ML17270A066

Submission of the Land Application Report Required Under Conditions 14 and 15 of the Confirmatory Order of March 28, 2017 Modifying License No. SUA-1471, EA-16-114

ML17270A066
Person / Time
Site:	04008903
Issue date:	09/25/2017
From:	George G F Davis Wright Tremaine, LLP, Homestake Mining Co of California
To:	Document Control Desk, Office of Nuclear Material Safety and Safeguards, NRC/OE
References
EA-16-114
Download: ML17270A066 (404)

Text

DavisWright 1.!! Tremaine LLP September 25, 2017 BY OVERNIGHT MAIL AND ELECTRONIC MAIL Deputy Director 505 Montgomery Street Suite 800 San Francisco, CA 94111-6533 GERALD F. GEORGE 415.276.6526 tel 415.276.6599 fax geraldgeorge@dwt.com 4D -

Director, Office of Enforcement

[OE] U.S. Nuclear Regulatory Commission One White Flint North Division of Decommissioning 11555 Rockville Pike Uranium Recovery and Waste Programs [DUWP] Two White Flint North Rockville, MD 20852-2738 11545 Rockville Pike Rockville, MD 20852-2738 Re: Submission of the Land Application Report required under Conditions 14 and 15 of the Confirmatory Order of March 28, 2017 modifying License No. SUA-1471, EA-16-114

Dear Sir or Madam:

Attached is the Land Application Report required under Cond.itions 14 and 15 of the March 28, 2017 Confirmatory Order for the Homestake Grants facility.

If you have any questions, please contact me as soon as possible.

Sincerely, Gerald F. George Counsel for Homestake Mining Company of California cc: NRC Document Control Desk (Hard Copy) Patricia Holahan, Director of OE (email) Andrea Kock, Deputy Director ofDUWP (email) Matthew Meyer (email) Holton Bums (email) Clark Burton (email) Tom Wohlford (email) Michael McCarthy (email) Michelle Burgess (email) I Anchorage Bellevue Los Angeles I NewYork Portland San Francisco I Seattle Shanghai Washington.

D.C. oE'/J( I AJ/vf5SO I ;Viv/ 5 5 fl/ flt/();;-www.dwt.com I I I I I I I I I I I I I I I I I I I Randy Whicker Land Application Impact Assessment For: U.S. Nuclear Regulatory Commission By: Homestake Mining Company of California P. 0. Box 98 Grants, New Mexico 87020 And Hydro-Engineering, L.L.C. And Environmental Restoration Group September 2017 Brandon Weaver George L. Hoffman, P.E. Senior Health Physicist Environmental Restoration Group, Inc. Hydrologist Hydro-Engineering, L.L.C. Hydro-Engineering, L.L.C TABLE OF CONTENTS Page Number Executive Summary ..............................................................

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ES-I 1.0 Introduction

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................................... 1-1 2.0 3.0 4.0 Irrigati on ...........................

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.... 2-1 2.1 Irrigation Area s*************************************:****************************************

2-1 2.1.1 South Irri ga tion Area ......................

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...................... 2-1 2.1.2 North Irri ga tion Area ..........

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..... 2-1 2.2 Water Volume Applied ...........................

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....................... 2-2 2.3 C on s tituent Concentrations in Irri g ation Water ...................

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............ 2-3 2.3.1 Co n s tituent Concentrations in the South Irrigation Water. ........................ 2-3 2.3.2 Constituent Concentrations in the North Irrigation Water ......................... 2-6 2.4 Mas s R e mo va l ..........................

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................. 2-9 So il and Soil Moisture (Po re Water) Assessment..

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.............................. 3-1 3.1 Subsurface Conditions

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........................... 3-1 3.1.1 Section 33 ...............

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..... 3-1 3.1.2 Section 34 ..............

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3-2 3.1.3 Section 28 ......................

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..... 3-2 3.2 Back gro und Soil Concentrations

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.. 3-2 3.2.1 South Area Background Soils ...................................

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.... 3-3 3.2.2 North Area Background Soils ........................................................

............. 3-4 3.2.3 Mean Background Soil Concentrations

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................................... 3-4 3.3 Incre ase in So il Concentration s ..........................

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.......................... 3-4 3.3.1 Section 33 Center Pivot Soils ........................................................

............. 3-5 3.3.2 Sections 33 and 34 F lood Area Soils .........................

................................. 3-6 3.3.3 Section 28 Center Pivot Soils ..............

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.. 3-6 3.3.4 Spatial Variability

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.................................. 3-6 3.4 Comparison of Soil Co ncentrations with Risk-ba se d Re g ulatory Criteria ..... 3-8 3.5 Observed Soil Moisture Constituent Concentrations

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....... 3-11 3.5.1 Section 33 .................

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3-11 3.5.2 Section 34 ..........

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.... 3-13 3.5.3 Section 28 ...............

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3-13 3.6 Soil Health ............................

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...... 3-14 3.7 Summary of Soil Assessment

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....... 3-14 Assessment of Groundwater Impacts ...................

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........................... 4-1 4.1 4.2 Section 33 ...............................

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...................................... 4-1 Section 34 .................

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4-2 4.3 Section 28 ...........................

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4-3 Grants Reclamation Project La nd Applicat i o n Im pact Assessment I I I I I I I I I I I I I I I I I I I I I 1 1 I I I I *I I I I I I I I 5.0 6.0 7.0 1-1. 2-1. 2-2. 2-3. 3-1 3-2. 3-3. 3-4. 3-5. 3-6. 3-7. 3-8. 3-9. 3-10. 3-11. 4-1. 2-1. 2-2. 2-3. 2-4. 2-5. TABLE OF CONTENTS (continued)

Page Number Human Health Assessment

-Impacts to the Public from Irrigation Activities

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5-1 5.1 Radiological Health Assessment..

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5-1 5.2 Non-Radiological Health Assessment

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5-2 5.3 Summary .........................

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5-2 Conclusions

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6-1 References

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7-1 FIGURES Page Number Location of the Irrigation Areas ..................................................

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1-2 South Irrigation Supply Wells ............................

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...... 2-12 North Irrigation Supply Wells ............................

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2-13 Yearly Quantity of Water and Uranium Removed .....................................................

2-14 Section 33 Depth to Top of Basalt , Location of Lysimeters, Additional Alluvial Monitoring Wells and Cross Section ........................

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.............. 3-15 Section 33 Geologic Cross Section 33A-33A' ..........................

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3-16 Section 34 Depth to Top of Basalt , Location of Lysimeters, Additional Alluvial Monitoring Wells and Cross Section ..........

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...... 3-17 Section 34 Geologic Cross Section 34C-34C' ................................

............................ 3-18 Section 28 Depth to Top of Basalt , Location ofLysimeters , Additional Alluvial Monitoring Wells and Cross Section ..........

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3-19 Section 28 Geologic Cross Section 28B-28B' ..........................

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3-20 Location of Pre-Irrigation and Background Soil Samples in the South Irrigation Areas ........................................

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... 3-21 Location of Pre-Irrigation and Background Soil Samples in the North Irrigation Area .............

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............... 3-22 Locations of Soil Samples in the South Irrigation Areas ............................................

3-23 Locations of Soil Samples in the North Irrigation Area ......................................

...... 3-24 Locations of the Soil Moisture Lysimeters in the Irrigation Areas ....................

........ 3-25 Locations oflrrigation Groundwater Monitoring Wells ..........................

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.4-5 TABLES Page Number Quantities of Water and Areas Irrigated

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2-2 Summary of North and South Irrigation Supply Water Quality ....................

............... 2-3 2000 through 2012 South Irrigation Supply Water Quality ................................

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2-4 Ra-226+Ra-228 , Vanadium and Th-230 Values for the South Irrigation Supply Wells .......................................................................

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2-6 2000 through 2012 North Irrigation Supply Water Quality ..........................................

2-8 Grants R e clamation Project II Land Application Impact Assessment 2-6. 2-7. 3-1. 3-2. 3-3. 3-4. 3-5. 3-6. 3-7. 3-8. 3-9. A. B. C. D. E. F. G. TABLE OF CONTENTS (continued)

TABLES Page Number Ra-2 26+Ra-2 28, Vanadium and Th-230 Values for the North Irrigation Supply Wells .......................................................................................

...................................... 2-9 Quantities of Wa ter App lied to Nort h and South A rea s and Mass of Constituents Rem ove d ...........................................

.......................................................................... 2-1 1 Summary Statistics of Pre-Operational Soi l Samples for the Irrigation Areas .............

3-3 S umm ary Statistics of Surface and Subsurface Soil for the Irrigation Areas ...............

3-5 S ummar y Statistics for uranium in indi vi dual soil sa mple s b y irri gatio n area (mg/kg) . ......................................

................................................................................................ 3-7 Summary Statistics for selenium in indi vi dual soi l sa mple s b y irri gat ion area (mg/kg) .................................................

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...... 3-7 Excerpte d de scri ptiv e statistics for soi l in flood irrigation areas (pCi/g) .....................

3-8 Excerpte d de script ive stat istic s fo r soil in Central Pivot fields (pCi/g) ..................

...... 3-8 Excerp ted back g round d esc ripti ve s tati st ic s for metals (mg/kg) and radionuclides (pCi/g) in soil ...............................

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3-8 Summary of Ra-226 Soi l Data fro m the RI , pCi/g ..................................................... 3-1 1 Typical Land Tre atm ent F ield Lysi met er Key Concentrations, in mg/1 .....................

3-12 APPENDICES Page Number Irrig atio n Water Quality .......................................

........................................................ A-1 Soil Concentrations

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........................ B-I Soil Moisture Co ncentration s ...................................................................................

.... C-I Section 33 Irr igatio n Area Groundwat er Quality ......................................................... D-1 Section 34 Irrigation Area Groundwater Quality .................. , ....................

................... E-1 Section 28 Irrigation Area Groundwater Quality .....................................................

..... F-1 RESRAD Model Re s ult s .............................................................................................. G-1 Gr a nts R e cl a m a tion Proj e ct i ii L a nd Application Imp act A sse s s m e nt I I I I I I I I I I I I I I I I I I I I I I I I I I I I .I I I I I I I I I I I Executive Summary This report presents an assessment of impacts from the land application (irrigation program) at the Homestake Grants Reclamation Project. The assessment was conducted to comply with Condition 14 of the Confirmatory Order entered by the NRC on March 28 , 2017. The irrigation project was conducted by Homestake Mining Company of California (HMC) from 2000 through 2012 by irrigating an area ranging from 100 to 394 acres with water containing slightly elevated uranium and selenium concentrations. The irrigation program project plan (HMC , 1999) established an upper limit for the uranium concentration in irrigation water at the U.S. Nuclear Regulatory Commission (NRC) effluent standard of 0.44 milligrams per liter (mg/I) (10 CFR 20 , Appendix B). Selenium was set at a site-specific State of New Mexico Water Quality Control Commission standard of 0.12 mg/I (NMED DP-200 permit). These limits were reduced to upper limits of 0.16 and 0. I 0 mg/I for uranium and selenium respectively by NMED for the limited irrigation occurring from 2010 through 2012. The fields subject to irrigation are located in Sections 28 , 33 , and 34 in Township 12 North , Range 10 West near Grants , New Mexico. Figure 1-1 shows the locations of the four irrigation fields. Fields in Sections 28 and 33 were irrigated using a center pivot irrigation system. The field in Section 34 and a small field in Section 33 were irrigated by flooding.

The total amount of irrigation water applied to the fields from 2000 to 2012 was 9551 acre feet (ac-ft), with annual applications ranging from 201to1054 ac-ft. The background concentrations of uranium and selenium in the soil are averages of these constituents in samples collected in the fields prior to the irrigation program , and in samples collected outside of the irrigated area for background comparisons.

The background concentrations are compared to the concentration in each one-foot (ft) interval of the upper five feet of soil in irrigated areas , and each two-foot interval below five feet starting in 2009. The difference between the irrigated soil and background concentration is assumed to be the quantity of constituent added from the irrigation.

The uranium and selenium concentrations in the soil only increased in the upper few feet of the soil profile , showing that these constituents are not migrating deeper into the soil profile. The largest measured uranium and selenium concentrations in soils subject to land application have remained below New Mexico screening levels. Lysimeters installed within the soil profile in irrigation areas produced samples of soil pore water which defined constituent concentrations in the soil moisture , but are not a direct measurement of input to the groundwater.

In this document and referenced reports , the terms soil moisture and pore water are used to describe water within or extracted from the vadose zone. An evaluation of uranium and selenium movement in the soil moisture predicts that these constituents will not reach the groundwater at rates that would cause groundwater levels to exceed applicable site standards. Groundwater monitoring has indicated that the alluvial groundwater in the Section 33 center pivot had small increases in sulfate , TDS and chloride concentrations, but these small increases essentially dissipated after irrigation ended. No increases in uranium , selenium or other minor constituents were observed.

The groundwater in the Section 34 flood area has had small Gra n ts R ec l a m a ti o n Proj e ct ES-I L and A pplicati o n Impa c t Assess m e n t increases in sulfate, TDS, chloride and uranium concentrations that may be attributed to the flood irrigation , but these small increases are dissipating and should continue to decrease.

Because of the higher resident constituent concentrations in Section 28 groundwater, no increases in concentrations have been detected in the Section 28 center pivot area , but groundwater mass loading similar to those observed in Section 33 center pivot groundwater likely occurred.

Uranium levels in the soil do not pose a significant human health risk from a radiological dose perspective.

The dose to any member of the public from any exposure pathway is negligible , and this includes other radionuclides that may have been introduced by irrigation during the land application project (see Section 5.0). Potential radiation doses to the public were conservatively evaluated for an unlikely " worst-case" subsistence farming scenario 1:

• A hypothetical resident farmer living near the irrigated areas during the land application project (2000 -2012).

• A hypothetical future resident farmer living on and farming any of the formerly irrigated areas. Each analysis shows that the radiological dose to existing or future occupants of the land on and near the irrigation areas is extremely small -less than one percent respectively of the public dose limits given in I 0 CFR 20. 1301 and the average dose that the population receives from natural background and medical radiation exposures.

With respect to toxicity criteria, both uranium and selenium levels in the soil are well below applicable New Mexico screening levels. The monitoring of uranium and selenium concentrations in groundwater will continue as part of the ongoing monitoring program until post closure groundwater monitoring is complete in the area. 1 It was acknowledged in the Draft RI Report (EPA, 2016) that deed restrictions on agricultural land use are currently in effect in these areas, but this assessment included a remote possibility of failure of institutional controls beyond the foreseeable future. Grants Reclamation Project ES-2 Land Ap plic atio n Imp act Assessment I I I I I I I I I I I I I I I I I I I I I I I 'I I I I I I I I I I I I I I I 1.0 Introduction This land application report provides an assessment of impacts associated with the irrigation of fields supplied with water from impacted groundwater sources near the Homestake Grants Reclamation Project. The irrigation project was conducted by Homestake Mining Company of California (HMC) from 2000 through 2012. The irrigation program facilitated hay cultivation and stabilized the soil against wind erosion. Four fields were irrigated with water containing slightly elevated concentrations of uranium and selenium.

Figure 1-1 shows the locations of the four fields irrigated to aid groundwater restoration in the Off-site areas. The extent of the North Off-site uranium plume was reduced by approximately one mile and the uranium and selenium concentrations were also reduced in the South and North Off-site plumes. An evaluation of the potential impacts from the irrigation program was presented in HMC (1999). The results from monitoring of the irrigation program were reported in HMC (2001 a , 2004a , 2005a , 2006a , 2007a , 2008a , 2009a , 20 l Oa , 2011 a , 2012a , 2013a , 2014a and 2016). The remainder of this report is organized a s follows. Section 2 presents irrigation areas , quantity of water applied and constituent concentrations of the irrigation water.

Section 3 presents the soil and soil moisture (pore water) assessment.

Section 4 presents the assessment of the groundwater impacts. Section 5 discusses the potential effects from the irrigation on human health. The report ends with conclusions and references.

Tabulations of the irrigation water quality , soil , soil moisture and groundwater quality data are presented in appendices.

G rants Reclamati o n Project 1-1 La nd Applicatio n Impact A ssess m e nt 29 32 0 1 Acre -...* 21 100Acre Center 28 C nter Pivot"" 33 .534-8 3 53-1

• LJ Irrigation Area Boundary D PLSS Section Sample Location by Investigation Year

• 1998

• 1999 & 2000 (Flood Irrigation)

• 1999 & 2000 (Pivot Irrigation) 24 1 FIGURE 1-1. LOCATION OF THE IRRIGATION AREAS -------------------

I I I I I I I I I I I I I I I I I I I I 2.0 Irrigation South and North irrigation systems were used to apply water to the Sections 33 and 34 and Section 28 , respectively (see Figure 1-1 for location).

The project plan (HMC, 1999) established an upper limit for the uranium concentration in irrigation water at the NRC effluent standard of 0.44 milligrams per liter (mg/I) (10 CFR 20 , Appendix B). The maximum allowable concentration of selenium in the irrigation supply was set at a State of New Mexico Water Quality Control Commission site standard of 0.12 mg/I. Yearly average uranium and selenium concentrations in the irrigation water were below these limits during the irrigation program through 2009. The upper concentration limits in the irrigation supply were reduced to 0.16 and 0.1 mg/I for uranium and selenium , respectively , for the limited irrigation in 2010 through 2012. As necessary , adjustments were made in the irrigation supply well configuration and production rates to ensure that season averages met established limits. Yearly data and average s are discussed in the following sections. 2.1 Irrigation Areas Four fields have been irrigated with water con t aining slightly elevated concentrations of uranium and selenium.

Figure 1-1 shows the locations of the four irrigations field s. Groundwater from wells adjacent to these fields near the Grants Reclamation Project was applied to fields situated in portions of Sections 28 , 33 and 34 of Township 12 North , Range 10 West. Table 2-1 presents the water usage , total irrigated area , and location of the irrigated area by section for each year. The center pivot irrigation area in Section 28 was originally 60 acres with irrigation during 2002 , 2003 and 2004 and was expanded to 100 acres prior to the 2005 season. The Section 33 center pivot area was 150 acres and there was also a 24-acre flood area in Section 33 that was irrigated in 2004 , 2005 , 2008 and 2009. The flood irrigated area in Section 34 was 120 acre s. 2.1.1 South Irrigation Areas The South irrigation system con s isted of the three fields in Sections 33 and 34 and was supplied by a common pipe connecting the South irrigation supply wells (see Figure 2-1 for location of wells used to supply the South irrigation water s upply from 2000 through 2012). HMC (2013a) describes the wells that were used during each year of the irrigation.

The irrigation supply wells were completed in the alluvial aquifer with the following exceptions. Wells 482 , 483 , 493 , 498 , CW44 and CW45 are completed in the Middle Chinle aquifer. Also , well CW53 is completed in the Upper Chinle aquifer , wells CW29 and CW42 are completed in the Lower Chinle aquifer and well 943 is completed in the San Andre s aquifer. Well 943 was used in the last two years of irrigation of the Section 34 flood area. 2.1.2 North Irrigation Area Figure 2-2 shows the wells that supplied irrigation for the North irrigation in Section 28. Water from these \Veils was piped to the Section 28 center pivot for application of this water. All of the North irrigation supply wells are completed in the alluvial aquifer , except well 951 R which is completed in the San Andres aquifer and was used during the last two years of irrigation. Gra nt s R e cl a m atio n Proj e ct 2-1 La nd Ap pl ica t ion .I mp ac t Assessme n t

2.2 Water

Volume Applied Wat er u s age and the ar e a s to w hich irri g ation wa ter was applied v aried w ith the l ow est amount of irrigation w ater of 201 acr e feet (a c-ft) applied in 2 010 to 1 2 0 acre s in S e ction 34 to a ma x imum of 1054 ac-ft a pplied in 2008 to 394 acres in Sections 28, 3 3 and 34 (Tabl e 2-1 ). Table 2-1. Quantities of Water and Areas Irrigated YEAR WATER USAGE (AC-FT) IRRIGATED AREA (AC) AREA IRRIGATED 20<Xl 7 1 5 2 7 0 Sections 33 and 34 200 1 695 2 7 0 Sections 33 and 34 2002 995 330 Sections 28 , 33 an d 34 2003 949 330 Sections 28 , 33 and 34 2004 1 028 354 Sections 28 , 33 an d 34 2005 1 034 394 Sections 28 , 33 and 34 2006 83 7 370 Sections 28 , 33 an d 34 200 7 7 89 3 7 0 Sections 28, 33 and 34 2008 1 054 394 Sections 28 , 33 an d 34 2009 73 1 394 Sections 28 , 33 an d 34 2010 201 1 20 Sect i o n 34 2011 213 100 Section 28 2012 3 1 0 220 Section 28 and 34 N ote: Irrigated areas and quantitie s of w ater applied were pr es ented in HMC (2 01 3 a). Gra n ts R ec l a m a t io n Projec t 2-2 La nd Applica t ion Imp act Assess m ent I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I 2.3 Constituent Concentrations in Irrigation Water Water samples collected at the end of the pipeline at the flood outlet or center pivot represent the water quality of the combined active supply wells a t'the time when the samples were collected.

A summar y of the samples collected from the South and North irrigation water is presented in Table 2-2 and presents the range and mean of the concentrations for uranium , selenium , total dissolved s olids (TDS) and sulfate observed in the 2000-2012 in the irrigation water. This tabulation shows that the mean of all of the uranium measurements for the South area was 0.23 mg/I while the mean for the North was 0.24 mg/I. Selenium mean concentrations were similar in the South and North irrigation water at 0.08 and 0.05 mg/I respectively. The mean TDS and sulfate concentrations in the North irrigation water were slightly higher than those in the South irrigation water at 1833 and 790 mg/I , respectively.

Table 2-2. Summary of North and South Irrigation Supply Water Quality Uranium Selenium TDS Sulfate No. of Data Range Mean Range Mean Range Mean Range Mean Site Values (mg/I) (mg/I) (mg/I) (mg/I) (mg/I) (mg/I) (mg/I) (mg/I) South Irrigated 78 0.11-0.04-1390-561-Water 0.37 0.23 0.14 0.08 2000 1589 1020 683 North Irrigated 65 0.08-0.02-1160-455-Water 0.51 0.24 0.19 0.05 2240 1833 1020 790 Note: The May 14 , 2003 and April 21 , 2008 uranium values in the South and the May 14 , 2003 selenium value in the North were not used in the range or calculation of the mean because they were an order of magnitude smaller than the remainder of the values. 2.3.1 Constituent Concentrations in the South Irrigation Water A tabulation of uranium , selenium , TDS , sulfate , chloride and molybdenum concentrations is presented in Table 2-3 for the South irrigation water. This table shows the measured concentrations in the South irrigation water throughout each year of irrigation and also presents the average for each constituent for each year. The average of y early average uranium concentrations was 0.26 mg/I through 2009. The irrigation uranium concentration limit was reduced from 0.44 mg/I to 0.16 mg/I after 2009 , and the average uranium concentration in the irrigation water for 2010 and 2012 was reduced to 0.13 mg/I. Selenium concentrations were less than 0.1 mg/I and gradually decreased with time. All major and minor constituent water quality data for the South irrigation supply are listed in Table A.1-1 and Table A.1-2 , respectively , in Appendix A. With respect to irrigation water sourced from a number of wells , only two measurements for radium-226

+ radium-228 (Ra-226 + Ra-228), vanadium (V) and thorium-230 (Th-230) were collected (Appendix A Table A.1-2). Data show the South irrigation water concentrations were below site standards for these three constituents. All the major and minor constituent concentrations for all of the South i rrigation supply wells are reported in Appendix A , Tables A.1-3 and A.1-4. Data from each supply well provided additional evidence of the low concentrations for some of the minor constituents of Ra-226 , Ra-228 , V and Th-230. Water G r a nt s R e clam at i o n Proj ec t 2-3 L a nd Applic a tion Imp act A ssessme nt quality statistics from individual supply wells for Ra-226 + Ra-228 , V and Th-230 are listed in Table 2-4. The low concentrations of Ra-226 + Ra-228 , V and Th-230 indicate the irrigation application did not likely increase their concentration in the soil or groundwater in the South area. -Sample Uranium Selenium TDS Sulfate Chloride Molybdenum Year Date Ima/II Ima/II Ima/II (ma/II Ima/II Ima/II 81612000 0.26 0.12 1530 650 105 <0.03 8/15/2000 0.26 0.12 1550 660 106 <0.03 8/18/2000 0.28 0.12 1570 623 115 <0.03 8/19/2000 0.27 0.12 1550 612 109 <0.03 2000 8/24/2000 0.27 0.11 1530 608 106 <0.03 812712000 0.26 0.11 1530 601 103 <0.03 812912000 0.3 0.11 1580 624 109 <0.03 91212000 0.28 0.11 1550 615 104 <0.03 Average 0.27 0.12 1549 624 107 <0.03 4/20/2001 0.28 0.11 1620 693 120 <0.03 4/27/2001 0.27 0.12 1590 688 120 <0.03 5/6/2001 0.3 0.11 1630 597 108 0.06 5/10/2001 0.25 0.09 1590 580 103 <0.03 5/19/2001 0.28 0.1 1590 660 118 <0.03 5/24/2001 0.24 0.11 1500 664 116 <0.03 6/3/2001 0.27 0.1 1610 665 118 <0.03 2001 6/10/2001 0.27 0.1 157 0 659 113 <0.03 6/28/2001 0.27 0.11 1530 661 104 <0.03 7/5/2001 0.22 0.1 1480 655 94 <0.03 7/24/2001 0.21 0.09 1460 650 120 <0.03 8/29/2001 0.28 0.1 1600 693 114 0.41 9/1/2001 0.27 0.1 1610 573 128 <0.03 9/1/2001 0.21 0.1 1570 561 121 <0.03 9/17/2001 0.29 0.13 1600 634 100 <0.03 Average 0.26 0.1 1570 642 113 0.04 4/15/2002 0.21 0.09 1510 708 125 <0.03 4/16/2002 0.25 0.1 158 0 704 129 <0.03 5/8/2002 0.25 0.11 1600 678 -------5/8/2002 0.26 0.1 1580 737 --------2002 5/14/2002 0.25 0.09 1560 741 120 <0.03 7/3/2002 0.23 0.1 1560 694 135 0.05 7/3112002 0.23 0.1 1580 678 123 <0.05 10/2/2002 0.21 0.1 157 0 703 --------Average 0.23 0.1 1564 705 126 <0.03 5/14/2003

• 0.03 0.05 1390 663 98.5 <0.03 2003 9/18/2003 0.22 0.08 1600 732 --------Average 0.22 0.08 1600 732 --------5/4/2004 0.28 0.11 1550 703 130 <0.03 5/27/2004 0.25 0.08 1570 690 130 <0.03 2004 8/18/2004 0.27 0.08 1530 693 --------10/6/2004 0.23 0.08 1560 629 133 <0.03 Average 0.26 0.09 1553 679 131 <0.03 4/19/2005 0.25 0.06 1520 1020 247 <0.03 412012005 0.25 0.06 1510 996 235 <0.03 5/25/2005 0.23 0.06 1580 603 131 <0.03 6/1/2005 0.24 0.06 1520 661 129 <0.03 2005 8/8/2005 0.27 0.06 1500 621 --------9/26/2005 0.3 0.07 1550 659 124 <0.03 10/11/2005 0.29 0.07 1580 612 125 <0.03 10/24/2005 0.35 0.08 1610 683 144 <0.03 Average 0.27 0.06 1546 732 162 <0.03 G rants R ec lamation Proj ec t 2-4 Land Appli c ation Imp ac t A ssess m en t I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I Table 2-3. 2000 2012 South Supply Water Quality (continued)

Sample Uranium Selenium TDS Sulfate Chloride Molybdenum Year Date (mall) (mg/I) (mall) (mg/I) (mall) (mall) 4/10/2006 0.24 0.05 1520 654 134 <0.03 612612006 0.37 0.1 2000 875 192 007 2006 8/14/2006 0.27 0.07 1580 696 --------10/10/2006 0.29 0.07 1500 639 128 <0.03 Average 0.29 0.07 1650 716 151 0.04 4/12/2007 0.28 0.06 1630 668 136 <0.03 4/30/2007 0.27 0.06 1580 670 132 <0.03 2007 61412007 0.23 0.06 1540 654 125 <0.03 8/21/2007 0.3 0.05 1600 678 -------10/22/2007 0.31 0.06 1570 661 143 <003 Average 0.28 0.06 1584 666 134 <0.03 417/2008 *O 0521 0.073 1430 687 160 <0.03 4/21/2008 0.262 0.042 1560 728 99 <003 2008 61212008 0.254 0.048 1550 683 142 <0.03 9/24/2008 0.213 0.049 1660 710 148 <0.03 Average 0.24 0.05 1550 702 137 <0.03 5/6/2009 0.262 0.048 1560 669 ----<0.03 6/16/2009 0.213 0.047 1660 717 178 <0.03 2009 712412009 0.239 0.047 1700 694 146 <0.03 9/28/2009 0.232 0.059 1770 754 160 <0.03 Average 0.24 0.05 1673 709 161 <0.03 8/30/2010 0.129 0.044 1610 716 158 <0.03 9/8/2010 0.129 0.045 1660 709 154 <0.03 9/15/2010 0.118 0.048 1700 731 162 <0.03 9/22/2010 0.119 0.044 1700 735 170 <0.03 2010 10/1/2010 0.143 0.044 1750 756 174 <003 10/6/2010 0.159 0.048 1660 754 171 0.11 10/13/2010 0.156 0.044 1760 754 170 <0.03 10/27/2010 0.144 0.045 1760 751 173 <0.03 11/1/2010 0.128 0.045 1800 745 168 <0.03 Average 0.136 0.045 1711 739 167 <0.03 8/22/2012 0.115 0.036 1690 666 155 <0.03 8/31/2012 0.119 0.041 1710 707 164 <0.03 9/5/2012 0.118 0.038 1690 711 165 <0.03 2012 9/21/2012 0.109 0.05 1690 681 158 <0.03 9/25/2012 0.111 0.037 1680. 677 158 <0.03 10/11/2012 0.115 0.037 1670 686 161 <0.03 10/17/2012 0.122 0.045 1700 698 167 <0.03 Average 0.116 0.041 1690 689 161 <0.03 Note: One half of the d etec tion limit was used i n calculating the average for non-detection va lues. Year Date 2010 11/1/2010 2012 10/11/2012 Gra n ts R e clamation Proj ec t Land App li cation Impact Assessment Parameter Ra-226 Ra-228 (pCi/I) (pCi/I) -0.02 0.7 0.38 1.4 2-5 v (mg/I) <0.01 <0.01 Th-230 (pCi/I) 0.04 0.03 Table 2-4. Ra-226+Ra-228, Vanadium and Th-230 Values for the South Irrigation Supply Wells SOUTH IRRIGATION WELLS Ra-226+Ra-228 Vana dium Thori um-23 0 Range Mean Range Mean Range W ell No. of Data Values (pCi/I) (pCi/I) No. of Data Values (pCi/I) (pCi/I) No. of Data Va lues (pCi/I) 482 4 <1.2-<2.3 1.31 4 <0.01-0.004 0.005 4 0.008-<l 483 2 0.76-<2 0.88 2 <0.01-0.004 0.0045 2 0.02-<1 490 18 0.1-<2 0.67 18 0.003-<0.10 0.007 18 0-<1.0 491 5 <1.2-<2.0 0.76 5 0.003-<0.10 0.005 5 <0.2-<1.0 493 20 0.03-4.94 0.91 20 0.004-<0.01 0.005 20 0-<1 496 1 <2.3-<2.3 1.8 1 <0.01-<0.01 0.005 1 0.1-<0.2 497 2 1.19-<1.2 0.9 2 <0.01-<0.01 0.005 2 0.08-<0.2 498 2 0.97-<1.2 0.79 2 <0.01-<0.01 0.005 2 0.1-<0.2 538 1 <1.2-<1.2 0.6 1 <0.01-<0.01 0.005 1 <0.2-<0.2 540 2 <1.4-1.63 1.17 2 <0.01-<0.01 0.005 2 0.02-<0.2 541 1 <1.7-<1.7 0.85 1 <0.01-<0.01 0.005 1 0.5-0.S 631 2 <1.2-<1.3 0.63 2 <0.01-<0.01 0.005 2 0.6-1.1 632 4 <1.2-<2.2 0.75 4 <0.01-<0.01 0.0 05 4 <0.2-<0.2 644 2 <1.2-<1.2 0.6 2 <0.01-0.01 0.0075 2 <0.2-<0.2 647 2 <1.2-<2.3 0.875 2 <0.01-<0.01 0.005 2 <0.2-<0.2 648 6 0-<1.7 0.54 6 <0.01-<0.01 0.005 6 0-0.6 649 11 0-4.2 0.86 1 1 <0.0 1-<0.0 1 0.005 12 0.04-0.5 653 2 <1.2-<1.2 0.6 2 <0.01-<0.01 0.005 2 <0.2-<0.2 657 2 <0.38-<1.2 0.4 2 <0.01-<0.01 0.005 2 <0.052-<0.2 658 2 <0.172-<2.5 0.67 2 <0.01-<0.01 0.005 2 <0.0 7-<0.2 687 4 0.3-<1.2 0.6 4 <0.01-0.0 1 0.006 4 <0.2-1.2 855 6 <1.2-<2.3 0.7 6 <0.01-0.01 0.007 5 <0.2-1.3 862 7 0.42-2.11 0.88 7 <0.01-<0.01 0.005 7 0-<0.2 863 5 <1.2-<4.6 1.04 5 <0.01-<0.01 0.005 5 <0.2-0.8 865 6 0.24-<18.5 2.02 6 <0.01-0.01 0.005 6 0.06-0.2 866 5 <1.2-3.5 1.48 5 <0.01-<0.0 l 0.005 5 <0.2-0.6 869 5 <1.2-<5.2 1.21 5 <0.01-<0.01 0.005 5 <0.2-0.8 943 9 0.33-12.8 2.58 9 <0.01-<0.01 0.005 9 0.005-0.8 996 5 <0.53-<1.2 0.58 5 <0.01-<0.01 0.005 5 0-0.3 C W 29 6 <1.2-4.7 1.63 6 <0.01-<0.0 1 0.005 6 0.02-0.6 CW42 3 <1.2-<1.2 0.6 3 <0.01-<0.01 0.005 3 <0.2-<0.2 C W 44 4 0.78-<l.2 0.65 4 <0.01-<0.01 0.005 4 0.004-0.6 CW45 4 0.52-1.2 0.73 4 <0.01-<0.01 0.005 4 0.005-<0.2 CW53 3 0.63-<1.7 0.988 3 <0.01-<0.01 0.005 3 0-<0.2 TOTAL 163 0-<18.S 1.000 163 <0.01-0.01 0.005 163 0-1.3 Note: One half of the detection lim it was used in calculating the average for non-detection values. 2.3.2 Constituent Concentrations in the North Irrigation Water Mean (pCi/I) 0.18 0.26 0.13 0.18 0.11 0.10 0.09 0.10 0.10 0.06 a.so 0.85 0.10 0.10 0.10 0.2 0 0.1 2 0.10 0.06 O.Q7 a.so 0.30 0.07 0.23 0.11 0.28 0.40 0.16 0.12 0.17 0.10 0.2 0 0.08 0.23 0.1 7 Average yearly concentrations varied from 0.14 to 0.39 for uranium and 0.03 to 0.08 mg/I se lenium for the North irrig ation water over the irrigation program life (Table 2-5). Tem porar y permission to irrigate in the North irrigation area was granted from NMED in 2011 w ith established upper concentration limits of0.16 mg/L for uranium and 0.10 m g/L for sele nium. Table 2-5 also presents the low levels of Ra-226, Ra-228, V and Th-230 measured for the Section 28 irrigation water in 2011 and 2012. Water quality data from the North irri gatio n water are listed in Table 2-5. The average of yearly average uranium concentrations for the 2002 through 2009 irrigation seasons was 0.32 mg/I which was below the irrigation limit of 0.44 mg/I. The irrigation concentration limit for uranium Grants Reclamation Project 2-6 Land Application Impact Assessment I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I wa s reduced to 0.16 mg/ after 2009 and the y early average uranium concentration for the North irrigation area in 2011and2012 was 0.14 mg/I. Average selenium concentrations were less than 0.1 mg/I for each year of irrigation. All major and minor constituent water qualit y data for the North irrigation water are l isted in Append ix A , Tables A.2-1 and A.2-2. Ra-226 + Ra-228 , V and Th-230 activities or concentrations measured in samples of the North irrigation water were at low levels (Table 2-5). All major and minor constituent concentrations for all of the North irrigation supply wells are listed in Appendix A , Tables A.2-3 and A.2-4. Water quality statistics for Ra-226 + Ra-228 , V and Th-2 3 0 for the individual North irri g ation s uppl y wells are s hown in Table 2-6. Low concentrations of Ra 226 +Ra 228 , V and Th-230 in the water applied to the North irrigation areas indicates a low potential to increase their concentration in the soil or groundwater in the North area. G r a n ts R e clam a ti on P ro j ec t 2-7 La nd A ppli cation I mpac t Assessme n t

-Sample Uranium Selenium TDS Sulfate Chloride Molybdenum Year Date Cma/ll Cma/ll Cma/ll Cma/ll {ma/I) (mg/I) 2002 10/2/2002 0.23 0.08 2070 881 --------2003 5/14/2003 0.24 <0.005 2070 936 184 <0.03 5/4/2004 0.23 0.07 2120 933 190 <0.03 512712004 0.29 0.07 2110 950 170 <0.03 2004 8/18/2004 0.27 0.06 2140 956 --------10/6/2004 0.27 0.06 2090 838 194 <0.03 Averaqe 0.27 0.07 2115 919 185 <0.03 4/12/2005 0.48 0.11 2220 955 176 0.09 5/6/2005 0.51 0.12 2230 1010 192 0.11 512012005 0.33 0.08 2120 916 194 <0.03 5/27/2005 0.26 0.06 2050 907 176 <0.03 2005 6/3/2005 0.33 0.08 2040 926 182 <0.03 6/10/2005 0.33 0.07 2000 943 186 <0.03 6/17/2005 0.31 0.08 2100 899 167 <0.03 10/11/2005 0.28 0.06 2110 863 170 <0.03 Averaqe 0.35 0.08 2109 927 180 0.04 3/1/2006 0.35 0.08 2230 926 197 0.04 4/10/2006 0.35 0.09 2150 985 185 0.05 2006 612612006 0.3 0.07 1550 645 158 <0.03 8/14/2006 0.36 0.09 1980 928 --------10/2/2006 0.38 0.09 2020 925 161 0.07 Average 0.35 0.08 1986 882 175 0.04 4/1/2007 0.32 0.08 2130 904 173 <0.03 4/30/2007 0.41 0.09 2240 980 164 0.04 2007 612612007 0.32 0.08 2010 856 163 <0.03 8/17/2007 0.38 0.08 2130 978 --------10/10/2007 0.39 0.09 2100 885 184 0.04 Average 0.36 0.08 2122 921 171 0.04 4/1/2008 0.465 0.083 2050 1020 90 0.05 2008 61212008 0.285 0.059 1750 893 152 <0.03 9/24/2008 0.318 0.056 1950 867 157 <0.03 Average 0.36 0.07 1917 927 133 0.04 412012009 0.388 0.065 2035 913 171 0.05 61212009 0.308 0.064 1980 871 174 0.03 2009 712412009 0.369 0.061 2020 852 -------9/28/2009 0.45 0.079 2080 940 1 77 0.07 Averaqe 0.39 0.07 2029 894 174 0.05 6/17/2011 0.198 0.042 1490 672 135 <0.03 6/23/2011 0.251 0.043 1570 685 138 <0.03 6/29/2011 0.222 0.049 1490 676 138 <0.03 7/7/2011 0.113 0.028 1290 532 1 1 0 <0.03 7/15/2011 0.0837 0.015 1160 455 87 <0.03 7/19/2011 0.155 0.028. 1360 559 109 <0.03 7/28/2011 0.13 0.021 1270 523 104 <0.03 8/3/2011 0.132 0.022 1230 522 103 <0.03 2011 8/18/2011 0.0944 0.024 1450 682 118 <0.03 8/24/2011 0.114 0.027 1460 629 -------8/30/2011 0.107 0.025 1390 604 114 <0.03 9/6/2011 0.124 0.027 1420 612 127 <0.03 9/13/2011 0.104 0.026 1410 607 1 25 <0.03 9/20/2011 0.128 0.033 1470 626 130 <0.03 9/27/2011 0.128 0.034 1530 676 1 38 <0.03 10/7/2011 0.127 0.029 1490 639 133 <0.03 10/12/20 11 0.122 0.032 1470 636 132 <0.03 Average 0.14 0.03 1409 608 121 <0.03 G r a n ts Recla m at i on Project 2-8 Land Application I mpact Assessment I *I I I I I I I I I I I I I I I I I I Table 2-5. 2002 throu I Water Quali *continued Sample Uranium Selenium Sulfate Chloride Molybdenum Year Date II . m II m II /I m /I II 8/7/2012 0.149 0.033 1750 744 187 <0.03 8/15/2012 0.176 0.039 2010 857 198 <0.03 8/22/2012 0.146 0.034 1830 738 183 <0.03 8/28/2012 0.135 0.031 1760 719 181 <0.03 9/5/2012 0.123 0.030 1770 706 180 <0.03 9/12/2012 0.158 0.038 1860 744 186 0.05 2012 9/18/2012 0.147 0.033 1800 755 184 <0.03 9/25/2012 0.132 0.034 1810 672 170 <0.03 10/2/2012 0.145 0.035 1830 768 195 <0.03 10/11/2012 0.129 0.038 1860 741 189 0.03 10/17/2012 0.131 0.044 1880 770 200 <0.03 10/24/2012 0.132 0.035 1920 796 200 <0.03 10/31/2012 0.133 0.038 1920 814 206 <0.03 Avera e 0.14 0.036 1846 756 189 <0.03 Note: One half of the detection limit was used in calculating the average for non-detection va l ues. Table 2-5. 2002 throu I Water Quali concluded)

Parameter Ra-226 Ra-228 v Th-23 0 Year Date (pCi/I) (pCi/I) (mg/I) (pCi/I) 2011 10/12/2011 0.39 -0.4 <0.01 0.05 2012 10/2/2012 0.08 0.1 <0.01 0.05 a e -. a-+ a-, ana mm an -a ue s or t e ort rnga 100 UDDI V e s T bl 2 6 R 226 R 228 V d. i h N hi . f S d Th 230 V I I W II NORTH IRR I GATION WELLS Ra-226+Ra-228 Vanadium Thorium-230 Range Mean Mean Range Well No. of Data Values (pCi/I) (pCi/I) No. of Data Values Range (mg/I) (mg/I) No. of Data V a lu es (pCi/I) 634 3 <1.2-7.2 3.04 3 <0.01-<0.01 o.oos 3 0-0.2 6S9 12 <1.2-1.S 0.62 12 <0.01-<0.01 o.oos 12 0-0.2 88 1 6 0.12-2.46 1.23 6 <0.01-0.01 0.006 6 0-0.2 886 7 0.01-1.91 1.4 7 <0.0 1-<0.0 1 o.oos 7 0-<0.2 890 7 0.2S-2.0 0.96 7 <0.0l-<0.01 o.oos 7 0.1-0.2 9S1R 4 0.71-3.4 2.12 4 <0.01-<0.01 o.oos 4 0.0006-0.1 M16 1 2.0S-2.0S 2.0S 1 <0.01-<0.01 o.oos 1 0.04-0.04 MO 2 <l.2-<l.6 0.8S 2 <0.01-<0.01 o.oos 2 <0.2-<0.2 MQ 2 <1.2-<2.1 1.1 2 <0.01-<0.01 o.oos 2 <0.2-0.6 MR 3 <1.3-3.01 1.S 7 3 <0.01-<0.01 o.oos 3 0.009-0.4 MS 3 0.49-<1.8 0.93 3 <0.01-<0.01 o.oos 3 0-0.40 TOTAL so 0-7.2 l.2S so <0.01-0.01 o.oos so 0-0.6 Note: One half of the detection lim it was used in calculating the average for non-detection values. 2.4 Mass Removal Mean (pCi/I) 0.10 0.07 0.10 0.06 0.11 o.os 0.04 0.10 0.3S 0.17 0.17 0.10 The extraction of water during the i rrig ation program sig nific antly reduced the constituent of concern (COC) concentrations in the areas where the irrigation supp l y water was extracted. A series of Annua l Performance Reports document the changes in concentrations of constituents of concern (COCs) in the irrigat ion areas w i th time (HMC 2001b , 2002, 2003 , 2004b , 2005b , 2006b , 2007b , 2008b , 2009b , 2010b , 2011b , 2012b and 2013c). The mass (vol um e of water Gran ts R e c l amati o n Proje c t 2-9 Lan d Appl i c a tion I m p a ct Assess m e nt multiplied by the concentration) of a constituent is a measurement of the amount removed from the groundwater and the mass applied to the fields. Table 2-7 presents the gallons of water applied to the South and North areas for each year. A high of 280 million gallons (859 acre-feet) of water applied to the South irrigation in 2002 to a low of 43 million gallons (132 acre-feet) also applied in 2002 to Section 28 prior to this area being expanded to 100 acres (Table 2-7). This table also presents the average uranium , selenium and sulfate concentration in the water for each area and year, and also presents the mass removal of uranium , selenium , and sulfate through the irrigation program. The irrigation volume has been a significant portion of the total volume of groundwater with elevated COC concentrations collected from the Grants Reclamation Project (GRP) area. A total of 3.1 billion gallons of water was pumped from the irrigation supply wells from 2000 through 2012 , while the volume of groundwater collected from the On-site area (i.e., for treatment , not for irrigation) was 4. 7 billion gallons from 1978 through 2012 (see Table 2: 1-1 in the 2012 Annual Performance Report , HMC 2013c). Figure 2-3 shows yearly gallons of water used in the irrigation program in blue , with a significant reduction in volume for years 20 I 0 through 2012 due to the regulatory limits on the areas irrigated. The calculated mass of uranium removed from the groundwater by the irrigation programs is 6 , 704 pounds. Figure 2-3 also shows the pounds of uranium removed from the groundwater each y ear in yellow. The uranium removed from the groundwater in 2010 and 2011 is only slightly more than a tenth of the average removal for prior years. The uranium removed i n 2012 is slightly l arger than that occurring in 2010 and 2011 , but is still only slightly more than twenty percent of that removed in the least productive year (2001 ). Grants R e cl a m a tion Pro j ect 2-10 Land A ppli cat ion Im pac t Assess m e nt I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I , I I Table 2-7. Quantities of Water Applied to North and South Areas and Mass of Constituents Removed YEAR SYSTEM TOTAL VOLUME URANIUM SELENIUM SULFATE 2000 NORTH SOUTH TOTAL 2001 NORTH SOUTH TOTAL 2002 NORTH SOUTH TOTAL 2003 NORTH SOUTH TOTAL 2004 NORTH SOUTH TOTAL 2005 NORTH SOUTH TOTAL 2006 NORTH SOUTH TOTAL 2007 NORTH SOUTH TOTAL 2008 NORTH SOUTH TOTAL 2009 NORTH SOUTH TOTAL 2010 NORTH SOUTH TOTAL 2 01 1 NORTH SOUTH TOTAL 2012 NORTH SOUTH TOTAL NORTH TOTAL SOUTH TOTA L COMBINED TOTAL PUMPED (GAL) 233 , 130 , 506 233,130,506 226 , 288 , 102 226,288,102 43 , 009 , 402 280 , 538 , 597 323,547,999 50 , 242 , 801 258 , 642 , 901 308,885,702 59,431 , 173 275,436, 118 334,867 , 291 77 , 547 , 254 259 , 444,440 336,991,694 75 , 918 , 110 196 , 865 , 761 272 , 783,871 78 , 850 , 570 178 , 098 , 022 256,948,592 89 , 928 , 749 2 54 , 674 , 307 344,603,056 60 , 278 , 328 177 , 648 , 378 237,926,706 65 , 296 , 092 65,296,092 69,401 , 53 4 69,401,534 52 , 137 , 000 48 , 821 , 000 100,958,000 656 , 744 , 921 2,4 54 , 884 , 224 3 ,11 1,629,145 CONC. (MG/L) 0.27 0.26 0.23 0.23 0.24 0.22 0.27 0.26 0.35 0.27 0.35 0.29 0.36 0.28 0.36 0.24 0.39 0.24 0.1 36 0.14 0.14 0.116 MASS (LB) 525.4 525.4 491.1 491.1 82.6 538.6 621.2 100.7 475.0 575.6 133.9 597.8 731.7 226.6 584.7 811.3 221.8 4 7 6.5 698.3 236.9 416.3 653.2 270.2 510.2 780.4 1 96.2 355.9 552.1 74.1 74.1 81.1 81.1 60.9 47.3 108.2 1 , 610.9 5 , 092.8 6,703.8 NOTE: *= .0025 mg/I u sed as concentration to calculate load Gra n ts R e clam a t io n Proj ec t 2-11 Land A ppl i c a ti o n Impac t As s es s men t CONC. (MG/L) 0.12 0.1 0.08 0.1 *<.005 0.08 0.07 0.09 0.08 0.06 0.08 0.0 7 0.08 0.06 0.0 7 0.05 0.0 7 0.05 0.045 0.0 3 0.04 0.04 MASS (LB) 233.5 233.5 188.9 188.9 28.7 234.2 262.9 1.0 172.7 173.8 34.7 206.9 241.6 51.8 129.9 181.7 50.7 115.0 165.7 52.7 89.2 141.9 52.5 106.3 158.8 35.2 74.1 109.4 24.5 24.5 17.4 17.4 17.4 16.3 33.7 342.2 1 , 591.6 1,933.8 CONC. (MG/L) 624 642 88 1 7 05 936 732 919 679 92 7 732 882 716 921 666 927 702 894 7 09 739 59 7 756 689 MASS (LB) 1 , 214 , 286 1,214,286 1 , 2 12 , 646 1,212,646 316 , 28 4 1,650,893 1,967,177 392 , 543 1 , 580 , 334 1,972,877 455 , 89 7 1 , 561 , 090 2,016,987 600 , 044 1 , 585 , 232 2,185,276 558 , 922 1 , 176 , 577 1,735,499 606 , 180 990 , 08 1 1 , 596,261 695 , 850 1,492 , 312 2,188,162 449 , 817 1 , 051 , 344 1,501,161 402 , 781 402,781 345 , 844 345,844 329 , 00 7 280 , 778 609,785 4 , 750 , 389 1 4 , 198 , 354 18,948,743 150 AC * .J""

• N --LEGEND--

rJ" °'. IRRIGATION SUPPLY 'JELL N SCALE' 1*

• 1500' FIGURE 2-1. --------t 24 AC FLOOD RETURN TRENCH..--Jf w

.__ _ _, ""'.__ _ _, DATE* 4/11/17 C*\PRDJECTS\2017-06

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COUNTY ROAD 63 21 22 28 27 o 951R 100 ACRE CENTER PIVOT o+ 0 0 N I PLE SANT-V LLEY w ESTA ES c*\pro,Jl'cts\2017-06\INGS\!8CPl!01e o IRRIGATION SUPPLY \JELL Dt\TE* 04/11/17 FIGURE 2-2 , NORTH IRRIGATION SUPPLY \./ELLS

-< II) Ill ... < < 0 c 3 II) OQ" Ill -""" 350 , 000 , 000 300,000 , 000 250,000 , 000 200,000 , 000 150,000 , 000 100 , 000,000 50,000 , 000 0 2000200120022003200420052006200720082009201020112012 Year 900 800 700 -< II) Ill 600 c ... Ill 500 =* c 3 ::tJ 400 II) 3 0 < II) 300 2: c= 200 100 0 Figure 2-3. Yearly Quantity of Water and Uranium Removed *Total Volume (gal) Uranium Removed {lbs) -------------------

I I I I I I I I I I I I I I I I I I I 3.0 Soil and Soil Moisture (Pore Water) Assessment Soil samples have been collected with a hand auger from irrigated and non-irrigated soils and analyzed for uranium , selenium , and chloride concentrations to quantify the retention/adsorption of these constituents in the soil profile over time (see HMC 2001a , 2004a , 2005a , 2006a , 2007a , 2008a , 2009a , 2010a , 201la , 2012a , 2013a , 2014a and 2016 for details).

The concentration of* uranium and selenium retained in soil was then used to show the gain in concentrations with depth (see the above referenced reports for the tabulations of the gains and figures in Appendix B). Chloride was tracked as a conservative constituent and used as a contrast to observations of selenium retention in soil. Samples collected from adjacent , fallow areas were labeled as background samples. Investigators labeled the samples collected prior to irrigation from areas slated for irrigation as pre-operations samples. Those were also assumed to be at background.

Soil moisture concentrations were initially collected from lysimeters in the irrigated fields in 2009. Lysimeters were installed starting in 2009 in selected locations to collect the soil moisture (pore water) samples (see HMC 2010a , 201 la , 2012a , 2013a , 2014a and 2016 for details on the lysimeters).

Soil moisture content instruments were also added in the upper soil profile in Sections 28 and 34 areas in 2012 to measure the soil moisture content variations.

The soil moisture content instrument results (see HMC 2013a , 2014a and 2016) show the drying of the soil profile because irrigation ceased shortly after their installation.

The 2013 and 2014 irrigation reports and the 2016 Annual Performance Report contain information on these instruments , but the instruments and data are not discussed further in this report. 3.1 Subsurface Conditions An interval of basalt exists within the alluvial material in the Sections 28 and 33 irrigation areas , which is important because its properties are very different than the remainder of the alluvium.

The depth to the top of the basalt shows the thickness of alluvial material above the basalt (Figures 3-1 , 3-3 and 3-5). The basalt is present as a lava flow generally over a portion of the alluvium or over the Chin le Shale or other bedrock. Although the basalt occurs within or in contact with the alluvium , it has physical and hydraulic properties that are typically much different than those of the alluvium.

Cross sections illustrate the subsurface conditions down to the base of the alluvial aquifer as well as , the underlying lithologies.

3.1.1 Section

33 The depth of the alluvial material to the top of the basalt is presented in Figure 3-1 for the Section 33 area. This figure shows that the depth of the basalt below the land surface varies from less than 5 feet in the southwestern portion of Section 33 center pivot to greater than 20 feet in the southeastern portion of the pivot. The eastern limits of the basalt are shown in the eastern portion of Section 33 where the basalt is absen t as indicated by a cross-hatch pattern. Figure 3-1 shows the location of a cross section that extends from irrigation well 657 to San Andres well 907 in Section 4. Figure 3-2 shows the cross section indicating thickness of the alluvial material Gra nt s R e clamation Proj e ct 3-1 L a nd Applic a tion Imp a ct A ssess m e nt above the basalt and the thickness of the basalt. The base of the alluvial material is also shown on this cross section and the 2009 alluvial water-leve l elevation is also presented to show how much of the alluvial material is saturated.

The cross section also shows the alluvial wells with their completion interval and also the depth of installation of lysimeters along this cross s ection. The lysimeter water quality samp l e results are presented in Section 3.5. 3.1.2 Section 34 The Section 34 flood area is shown on the eastern portion of Figure 3-3 which also includes the Section 33 area. The 120-acre flood area is just south of Murray Acres and the basalt is not present under any of the Section 34 flood area. Figure 3-3 shows the location of a cross section which extends from well CW43 in the Section 33 flood area through the southern portion of the Section 34 flood area and into the western edge of Section 35. This cross section shows the depth to the alluvial aquifer and the base of the alluvial aquifer (see Figure 3-4). On the western side of the cross section shown in Figure 3-4 , the basalt is present and the e l evation of the base of the alluvium is higher than the surrounding water-leve l elevation in the alluvium.

The cross section shows the location of the West. Fau l t east of well CW37 , and also show s that the Upper Chinle aquifer subcrops against the alluvia l aquifer in the ea s tern edge of this cross section. Three lysimeter locations and installed depths are shown on the cross section figure. The soil moisture content instruments in Section 34 are adjacent to lysimeter L Y34-3 and are also shown on the cross section in Figure 3-4. The Section 33 flood area is also shown i n Figure 3-3 on the east side of Section 33. The 24-acre flood area is just south of Valle Verde and the basalt is present under all of the Section 33 flood area. The cross section shows the depth to the basalt and base of the alluvium in the Section 33 flood area (see Figure 3-4). 3.1.3 Section 28 Figure 3-5 shows the depth to basa l t in the Section 28 center pivot (North) area. The depth to basalt in this area generally increases from the southwest side of the center pivot where the depth to the top of the basa l t is approximately 10 feet to greater than 20 feet on the northeast side of the center pivot. The cross-hatch pattern shows where the basalt does not exist in the alluvial material in the far southeast corner of Section 28. Figure 3-6 presents the cross section from irrigation well 659 through well CW32 (see Figure 3-5 for location of this cross section). This cross section shows that the basalt extends down below the alluvial water l evel in the majority of the Section 28 center pivot area. The cross section a l so shows the completion of two lysimeters and the soil moisture content instruments located adjacent to L Y28-2 and L Y28-2M. 3.2 Background Soil Co n centrations Naturally-occurring uranium and selenium concentrations in unirrigated soi l s were determined in two studies. In 1998 , HMC characterized uranium and selenium concentrations in soi l s , prior to selecting fie l ds for the irrigation stud y. Additional pre-operational soil samples were collected in 1999 in Sections 33 and 34 prior to the start of irrigation.

Data for the pre-operation samples are reported in Appendix B. Figures 1-1and3-7 show the locations of the pre-irrigation soil samples whi l e Figure 3-7 also shows the locations of the background samp l es collected during Gran ts R e cl a m a tion P rojec t 3-2 Land A ppli ca tion Imp act A ssess m e nt I I I I I I I I I I I I I I I I I I I I I I I I I I I I I 1 1 I I I I I I the irrigation.

HMC has also collected and analyzed soil background samples outside of the irrigated areas during the irrigation program through 2010. The mean background s oil concentrations are considered to be well defined. No additional soil samples outside of the irrigation areas were collected in 2011 or 2012. The statistics for the pre-operational soil samples in Sections 28 , 33 and 34 are presented in Table 3-1 and the sample location s are presented on F igures 1-1 , 3-7 and 3-8. Table 3-1. Summary Statistics of Pre-Operational Soil Samples for the Irrigation Areas. Statistic Section 28 Section 33 Section 34 Number of samples 14 22 22 Depth Range 0-84 0-60 0-60 (inches)*

Analyte Analyte Analyte U (pCi/g) Se (mg/kg) U (pCi/g) Se U (pCi/g) Se (mg/kg) (mg/kg) Mean 0.34 0.07 0.57 0.10 1.6 0.25 Standard Deviation 0.24 0.06 0.29 0.07 1.2 0.21 Minimum 0.13 0.03 0.24 0.03 0.58 0.03 Maximum 1.06 0.18 1.23 0.2 5.85 0.8 Median 0.24 0.04 0.53 0.10 1.2 0.14 3.2.1 So u t h Area Background Soils The first soils investigation (RIM CON and Hydro-Engineering , 1998) was completed prior to the selection of irrigation areas. Surface and near-surface soil samples were collected inside and outside the fields slated for irrigation. Th e samp l es were analyzed for uranium an_d selenium concentrations and parameters to define soil types. Figure 3-7 shows the location of the operational soil samples in the South irrigation areas and also shows where additional background samples were collected in 2000 through 2010 outside of the irrigated areas (see HMC 2001 a , 2004a , 2005a, 2006a , 2007a , 2008a , 2009a , 201 Oa , 20 I I a and 20 I 2a for details on the additional background soil samples).

At the time of sampling , surface soi l s in Sections 28 , 33 , and 34 were placed in three general categories

loamy sand , sandy loam , and sandy clay loam , respectively. The percentage of clay in these soil s increased from Section 28 to 33 to 34 (RIM CON and Hydro-Engineering , I 998). The pre-operational and background soil sample data for Section 33 and 34 including pH , conductivity , calcium , magnesium , sodium , sodium adsorption ratio (SAR) and sulfate are reported in Appendix B. The Section 33 flood area samples are presented with the Section 34 flood soil data because the soil type in the Section 33 flood area is similar to the Section 34 flood area soil. A " 1998" in the comment column in the tables indicate the sample was taken during the I 998 background investigation.

Gra n ts R e clam a ti o n Proj ec t 3-3 Land A pp l i cat i o n Impa ct A ssessme nt

3.2.2 North

Area Background Soils Pre-operational and background samples from locations outside of the irrigated area were collected for the Section 28 North irrigation area (Figure 3-8). The pre-operational and background soil sampling results are tabulated in Appendix B. 3.2.3 Mean Background Soil Concentrations Mean background is defined as the average of the pre-irrigation and background concentrations ofconstituents in all such samples collected (see Tables B.1-1 , B.1-3 and B.2-1 in Appendix B for the mean background values). The mean background soil concentration data are tabulated by section and depth interval , and were updated with new data as they were obtained through 2010. These mean background values are used to calculate the retention of a constituent in the soil profile in the irrigated areas. Plots of the mean background concentration with depth in the soil profile are included in Appendix B, and compared to measured irrigated concentrations as discu s sed in the following section. The mean background concentrations of selenium are similar in Sections 28 and 33. Selenium concentrations in Section 34 are generally higher , presumably because of their association with clay soils. A statistical indication of the variability in uranium , selenium , and chloride levels in background soils includes coefficients of variation (100 x standard deviation/mean) ranging between 0 and 89 percent. 3.3 Increase in Soil Concentrations Uranium , selenium, molybdenum , calcium , magnesium , sodium , chloride , and sulfate levels were measured in soil samples from Sections 33 and 34 in 1999 (prior to irrigation) and after each of the 2000 through 2012 irrigation seasons. The pH , conductivity and SAR were also measured or calculated for the samples. All samples within each irrigation area were composited to give average concentrations for use in evaluating temporal changes over time as the irrigation project progressed.

With respect to spatial variability , the data are somewhat limited , but in 2009 , individual samples from various locations were analyzed separately for each irrigation area. A statistical description of these individual sampling data is provided in Section 3.3.4. Changes in soil chemistry between pre-irrigation samples and those collected after the first irrigation season in 2000 are described in HMC , 200la , 2004a , 2005a , 2006a , 2007a , 2008a , 2009a , 201 Oa , 2011 a , 2012a , 2013a , 2014a , 2016 and in this report. The statistics for the irrigated soil samples collected from 2000 through 2013 in Sections 28 , 33 and 34 are presented in Table 3-2. G rant s R ec lamation P rojec t 3-4 L a nd Application Imp act A sse s s m e n t I I I I I I I I I I I I I I I I I I I I I I I I I I I I 1* 1 1 I I I I I I I I Table 3-2. Summary Statistics of Surface and Subsurface Soil for Irrigation Areas Statistic Section 28 Section 33 Section 33 Section 34 Pivot Pivot Flood Flood Number 125 144 74 123 Analyte Analyte Analyte Analyte u Se u Se u Se u Se (mg/kg) (mg/kg) (mg/kg) (mg/kg) (mg/kg) (mg/kg) (mg/kg) (mg/kg) Mean 0.81 0.26 0.98 0.29 0.99 0.22 1.73 0.25 Standard 0.40 0.28 0.42 0.26 0.55 0.16 0.35 0.21 Deviation Minimum 0.35 0.05 0.42 0.05 0.13 0.05 0.31 0.03 Maximum 2.99 1 2.51 1 1.96 0.56 5.15 0.8 Median 0.74 0.15 0.69 0.19 1.10 0.21 1.26 0.14 3.3.1 Sections 33 Center Pivot Soils The location of soil samples collected after the irrigation season each year is shown in Figure 3-9 for the Section 33 center pivot. The composite soil sample results are presented in Table B.1-5 in Appendix B (see HMC 200la , 2004a, 2005a, 2006a , 2007a , 2008a , 2009a , 2010a , 201 la , 2012a , 2013a and 2014a for details of the soil sampling).

Figure B.1-1 in Appendix B presents a plot of the mean concentrations for the background which includes data through 2010 and irrigated soil uranium concentrations with depth for the Section 33 pivot soils for years 2006 , 2008 , 2010 and 2012. The mean background concentrations for Section 33 center pivot are also presented on this plot. Comparing the background mean concentrations to the soil data collected after irrigation began shows that the uranium concentrations increased the most in the upper two feet. The uranium soil concentration increase occurred in the upper six feet of the soil profile , indicating very little movement of uranium below this depth. On the average , the 2010 and 2012 soil concentrations (after ceasing the Section 33 irrigation) are slightly higher than the average in 2006 and 2008. A small increase in the selenium levels in the upper six feet was observed in the Section 33 pivot area soils (see Figure B.1-2). At depths greater than six feet , the irrigated soil selenium concentration in the soil profile is generally indistinguishable from background.

Meteoric water mobility tests were also conducted in 2015 to define the potential for constituents in the soil to become mobile as water comes in contact with the Section 33 center pivot soils. Table B.1-8 in Appendix B presents the water mobility test results for the Section 33 soils (see HMC 2016 for locations).

These tests generally indicate more mobility of constituents in the upper portion of the soil profile similar to the patterns shown by soil concentration measurements through 2013. G r a n ts R e clamati o n Proj ec t 3-5 La nd Application Imp act A ssess m e nt

3.3.2 Sections

33 and 34 Flood Area Soils The locations of the Sections 33 and 34 flood irrigation area soil samples are also presented on Figure 3-9 (see Tables B.1-6 and B.1-7 in Appendix B for the Section 33 and Section 34 flood area soil analyses).

Uranium concentrations versus depth for the Section 34 soils are shown on Figure B.1-3 in Appendix Band the concentration profiles illustrate that all of the increases above background are in the upper three feet of these clayey soils. Concentration profiles were not developed for the Section 33 flood area due to the limited data. The variability in the soil results makes it difficult to define any trends with time, and the concentrations in the upper three feet are fairly similar from 2006 through 2012. The clayey soils in Section 34 have a higher mean background concentration than the sandy soils in Section 33 and also retain more uranium in the upper soil interval s. Mean selenium concentrations are also higher both in background and irrigated soils in the clayey soils in Section 34 when compared with the Section 33 soils. Figure B.1-4 shows that the selenium concentrations increased above background in only the upper three feet of the Section 34 flood irrigated area soils. Table B.1-8 in Appendix B presents the meteoric water mobility test results for each foot interval below the land surface for the Sections 33 and 34 flood area soils. These tests generally show higher concentrations for the upper portion of the soil profile , indicating a larger potential for constituent movement from the upper portion of the soil profile. 3.3.3 Section 28 Center Pivot Soils The irrigated soil sampling locations are shown on Figure 3-10 for the Section 28 center pivot. The results from these samples are tabulated in Table B.2-3 in Appendix B. Figure B.2-1 shows a plot of the mean uranium soil concentrations for Section 28 soils with depth for background samples collected in 2006 , 2008 , 2010 and 2012. A small increase in mean uranium concentrations above the background was observed for the upper six feet of soil. The background and irrigated soil concentrations are similar below a depth of six feet. Selenium concentrations in the Section 28 sandy soils also on l y increased a small amount in the upper few feet. Figure B.2-2 presents the plot of the selenium soil concentrations for Section 28. Table B.2-4 in Appendix B presents the meteoric water mobility test results for each foot interval below the land surface for the Section 28 sandy soils. These tests generally show higher concentrations for the soils from the upper portion of the soil profile , indicating a larger potential for constituent movement from the upper portion of the soil profile. 3.3.4 Spatial Variability The spatial variability in uranium and selenium soil concentrations is of interest with respect to demonstrations of compliance with soil cleanup criteria.

Soil samples for a given irrigation area G r a n ts R e cl a mation P rojec t 3-6 L a nd A ppli c ation Imp ac t Assess m e n t I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I were nonnally composited during the land application program to represent average values , and there is a need to understand spatial variab i lity with respect to evaluating compliance with cleanup criteria for soils. The variability within and between irrigation areas was evaluated ba s ed on individual s oil samp l es that were collected and analyzed separately in 2009 for both uranium and selenium (HMC , 2012a). Summary statistics for these data are provided in Tables 3-3 and 3-4 below. Coefficient of variation (CV) values for individual locations across these irrigation areas ranged from 13.7% to 58.3%. Relative to proposed cleanup criteria for uranium (16 mg/kg) and s elenium (5.17 mg/kg) as discussed in the following section of this report , this amount of variation in concentrations across the irrigation areas is considered relatively low and concentrations relatively uniform. However , the data are somewhat limited in scope and the s ampling design was not intended to address issues of compliance with soil cleanup criteria.

Table 3-3. Summary Stat i stics for uranium in individual soil samples by irrigation area (me/ke) Area N Mean Median Minimum Maximum Std. Dev. Coef. Var. 95% UCL 34 Flood 9 4.1 4.0 1.6 5.5 1.2 28.5 4.9 34 BKG 9 3.4 3.3 1.7 4.7 0.9 27.8 4.1 33 Pivot 10 2.0 2.0 1.2 3.6 0.7 32.6 2.5 28 Pivot 8 1.6 1.4 1.1 3.5 0.8 48.1 2.3 33 BKG 4 1.0 1.0 0.8 1.1 0.1 13.7 1.2 Table 3-4. Summary Statistics for selenium in individual soil samples by irrigation area (me/ke) Area N Mean Median Minimum Maximum Std. Dev. Coef. Var. 95% UCL 34 Flood 9 1.0 1.0 0.4 1.4 0.3 28.4 1.2 33 Pivot 10 0.4 0.4 0.3 0.5 0.1 23.8 0.5 28 Pivot 8 0.4 0.4 0.2 0.9 0.2 48.5 0.6 33 BKG 4 0.3 0.3 0.2 0.6 0.2 58.3 0.6 34 BKG 9 0.7 0.6 0.2 1.3 0.3 48.3 0.9 In addition , individual soil samples collected by EPA (EPA , 2013) were also analyzed in a context of spatial variability within and between land application areas. Statistics for isotopic uranium (U-238 , U-234 , and U-235) and selenium within flood or pivot irrigation area s are provided in E PA's 2013 draft Human Health Risk Assessment Report (EPA , 2013), and in Appendix E of the EPA's Draft Remedial Investigation Report (EPA , 2016). Respectively excerpted data are reproduced below as Tables 3-5 and 3-6 , respectively.

Summary statistics for background soil concentrations of these constituents are also excerpted in Table 3-7 below. These data generally show similar CV values , ranging from about 13% to 85%. Again , this amount of spatial variability i s considered relatively low and concentrations relatively unifonn relative to the proposed cleanup criteria for uranium (16 mg/kg) and selenium (5.17 mg/kg) as discussed in the following section of this report. Gra nts R e clam a t ion Pro jec t 3-7 La nd A pplic a tion Im p ac t Assess m ent Table 3-5. Excerpted descriptive statistics for selenium (mg/kg) and radionuclides (pCi/g) in soils for flood irrigation areas Constituent N Mean Median Minimum Maximum Std. Dev. Coef. Var. 95% UCL Selenium 6 0.85 0.75 0.5 1.31 0.35 40.93 1.14 U-234 6 1.66 1.47 0.88 2.73 0.69 41.74 2.23 U-235 6 0.16 0.17 0.12 0.19 0.03 18.08 0.19 U-235 6 0.1 0.09 0.02 0.19 0.07 71.25 0.16 U-238 6 1.76 1.67 1.06 2.49 0.55 31.36 2.21 Table 3-6. Excerpted descriptive statistics for selenium (mg/kg) and radionuclides (pCi/g) in soils for center pivot irrigation fields Constituent N Mean Median Minimum Maximum Std. Dev. Coef. Var. 95% UCL Selenium 13 0.48 0.46 0.29 0.71 0.11 23.24 0.53 U-234 12 7 0.73 0.56 0.84 0.09 13.43 0.7 5 U-235 9 0.07 0.07 0.06 0.1 0.01 14.49 0.08 U-235 12 0.05 0.06 0.02 0.08 0.03 51.64 0.06 U-238 12 0.63 0.61 0.48 0.89 0.12 19.33 0.69 Table 3-7. Excerpted background descriptive statistics for selenium (mg/kg) and radionuclides (pCi/!!) in soil Constituent N Mean Median Minimum Maximum Std. Dev. Coef. Var. 95% UCL Selenium 12 0.55 0.4 0.35 2.03 0.47 85.18 0.8 U-234 5 0.91 0.88 0.6 1.22 0.24 26.67 1.14 U-235 12 0.1 0.1 0.06 0.12 0.02 18.82 0.11 U-235 5 0.06 0.06 0 0.12 0.05 81.62 0.11 U-2 38 5 0.95 0.89 0.73 1.21 0.21 21.76 1.15 3.4 Comparison of Soil Concentrations with Risk-based Regulatory Criteria This report summarizes all soil sampling data collected as part of the land application activities commissioned in 2000. Increases in uranium and se lenium concentrations in surface soil have been observed in each irrigation area , but the levels are below regulatory limits and screening threshold s established to protect human health. Soil sampling data for the land application irrigation areas demonstrate the following:

• No concentrations of uranium in soil exceeded the 2017 State of New Mexico Soil Screening Levels (SSL) of 234 mg/kg for residential land use [or 270 mg/kg to be protective of groundwater quality , assuming a dilution/attenuation factor (DAF) of 20 as recommended by the New Mexico Environment Department] (NMED , 2017). Grants R ec l a mation Project 3-8 Land Application Impa c t Assessment I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I

• No concentrations of uranium in soil exceeded the most recent (2017) EPA Regional SSL of 16 mg/kg for residential land use [o r 280 mg/kg for protection of groundwater qua I ity , assuming the E PA's default OAF of 20 (EPA , 1996)].2

• No concentrations of selenium in soil exceeded the State of New Mexico SSL of 391 mg/kg for residential land use [or 5.17 mg/kg to be protective of groundwater quality , assuming a OAF of 20 as recommended by the New Mexico Environmental Department (NMED, 2017)].

• The data indicate that uranium and selenium levels in soil within the irrigation areas would not pose an unacceptable health risk to future human receptors under any future land use practices.

It was acknowledged in the Draft RI Report (EPA , 2016) that deed restrictions on agricultural land use are currently in effect in these areas , but this assessment includes a remote possibility of failure of institutional controls beyond the foreseeable future. As required in 10 CFR 40 Appendix A , Criterion 6(6), a radium-226 benchmark evaluation to establish uranium clean-up levels in soil based on a radiological endpoint was performed and is presented in Section 5 of the Decommissioning and Reclamation Plan Update 2013 (HMC , 2013b ). That report was submitted to NRC i n 20 l3 and has been reviewed but has not been approved.

The soil clean-up level for uranium based on this benchmark evaluation is 404 pCi/g (597 mg/kg assuming a specific activity of 677 pCi/mg for natural uranium).

Since the soil clean-up level concentration for uranium is much greater than the SSL concentration for uranium , HMC proposed a uranium soil clean-up level equivalent to the NMED SSL activity concentration of 235 mg/kg (the residential SSL in effect at that time), which equates to an activity concentration of 159 pCi/g. Although irrigation area soil concentrations for uranium and selenium are below any current potentially applicable SSL on an individual basis (including recently updated SSLs from NMED and EPA), both NMED and EPA have risk assessment provisions if mult i ple contaminants are present. EPA's Risk Assessment Guidance for Superfund (RAGS) describes summation of risks for carcinogens, and calculation of a Hazard Index (HI) for non-carcinogens (EPA , 1989). Because SSLs for both uranium and selenium are based on non-cancer (toxicity) effects , the HI approach is appl i cable to the land application irrigation areas. NMED has adopted the same approach (NMED, 2017), and defines the HI as follows: S. H d I (HI) (cone,. i t e a z a r ndex = --SS L" Ris k A ss e ss menr G uidan ce f o r I n v es ti g atio n s and R emediaci o n Vo l ume I Marc h 2 0 1 7 cone v c o n e cone. J --* +--, + ... +--1 x l SS L , SS L , SSL 1 Equation 59 2 " EPA has selected a default DAF of 20 to account for contaminant dilution and attenuation during transport through the saturated zone to a compliance point (i.e., receptor we ll). At m o st sites, this adjustment w i ll more accurately reflect a co ntaminant's threat to ground water resources than assuming a DAF of 1 (i.e., no dilution or attenuation)

." (EPA, 1996). Grants R ecl am a t ion Proj ec t 3-9 L a nd Appli ca tion Im pac t Assess m en t For soils to be released from further regulatory consideration , the HI must be ::; 1 (unity). This HI approach for non-radiological health endpoints is analogous to the dose-based fractions" approach described for radiological health endpoints in 10 CFR 20 Appendi x B , as well as the " unity rule" for evaluation of compliance with soil cleanup criteria indicated in 10 CFR 40 , Appendix A , Criterion 6(6). Table 3-2 summarizes the soil data for uranium and selenium from 2000 to 2013. All soil sampling data are included in Appendix B. E xisting data indicate that the highest measured uranium concentration in soil was 5. 15 mg/kg , about three times low e r than the most restrictive regulatory limit considered protective of human health and the environment (16 mg/kg; EPA Regional SSL for residential land use , assuming EPA's default DAF of 20 for the groundwater pathway).

The highest selenium concentration was 1 mg/kg , approximately five times lower than the most re s trictive r e gulatory limit of 5.17 mg/kg (State of New Mexico SSL for protection of groundwater quality , a s suming a DAF of 20 per NMED , 2017). When the maximum uranium and selenium concentrations in soil for an y irrigation area are evaluated collectively against the most restrictive SSLs as noted above , the corresponding sum-of-fraction s calculation yields the followin g HI result: HI= 5.15 m g/kg + 1 6 mg/k g 1 mg/kg 5.17mg/k g 0.5 2 Because this result i s well below a value of one (unity), thi s evaluat i on indicates that the additive impacts for uranium and s elenium in soil associated with the land application program are well below current regulator y thresholds established to be protective of human health. In addition , this assessment does not include a subtraction of background concentrations and thus overestimates the true human health impacts of the land application irrigation program. Based on the above analysis , it is proposed that acceptable individual soil concentration criteria for release of the land application areas for unrestricted future use be set at the most restrictive current SSLs for uranium (16 mg/kg) and selenium (5. 17 mg/kg) (from E PA and NMED , re s pectively , each assuming a DAF of 20), and the HI calculation as defined above will be used to determine compliance with the limit for combined toxicity effect s from both constituents. Table 3-8 presents Ra-226 activity data for soil samples collected by the EPA as part of a background soil analysis program. These data were included in the Draft Human Health Risk Assessment (EPA , 2013) and Draft Remedial Investigation Report (E PA , 2016). Although the EPA s ampling program included samples collected throughout the overall project area , only tho s e samples from the former irrigation areas are relevant to thi s analysis.

A total of eighteen samples were collected by EPA with six samples from each of the center pivot sprinkler areas in Sections 28 and 33. Four samples were collected from the Section 34 flood irrigation area , and two samples were collected from the Section 33 flood irrigation area. The Ra-226 activity in all samples was below 5 pCi/g , the soil cleanup criterion for license termination and unrestricted future u s e as given in 10 CFR 40 , Appendix A. These results are consistent with the very low Ra-226 activities measured in irrigation supply water (Appendix B , Tables A.1-2 and A.2-2). G ran ts R e cl a mati o n Projec t 3-10 La nd Applicati on Im pact Assess m ent I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I T bl 3 8 S fR 226 S *1 D f h RI C"/ a e -. ummarv o a-OI ata rom t e 'P' l'g No. Data Section 33 Pivot No. Data Section 33 Flood No. Data Section 34 Flood N o. Data Section 28 Pivot Values Range I Mean Values Range I Mean Valu es Range I Mean Values Range I Mean 6 I.I -1.6 1 1.2 2 1.8 -2.41 2.1 4 2.4-3.ll 2.9 6 0.83 -1.2 I 1.0 3.5 Observed So il Moisture Constit u ent Concentrations Lysimeters were installed in the irrigation field areas to collect soil moisture samples and enable the measurement of the soil moisture constituent concentrations in 2009. The lysimeters were insta ll ed in augured holes at the desired depths. The porous cups were packed with a very fine flour sand to enhance their contact w i th the surrounding so il and the ability to pull moisture into the cup. A vacuum is placed on the lys i meter , which causes the soil moisture water to enter the cup. The soil moisture samples are then collected by purging the lysimeter cup. It is important to note that the fine sand around the lysimeters is typically installed w i th a slurry technique using distilled or deionized water. This places a zone of water with very low constituent concentrations around the lysimeters at installat i on. Because soil moisture typica ll y moves very slowly , particularly under drier conditions , the initial lys i meter samp l es may essentially recapture a portion of the water used in installation before i t has fully exchanged with or been replaced by the natural soi l moisture. The water quality results for the first few lysimeters samp l es collected frequently have sign i ficantly lower constituent concentrations than subsequent samples. The method of installing the l ysimeters may have affected the early l ysimeters sample concentrations and should be considered in interpreting the results. Lysimeters have been placed in each of the irrigation areas and Figure 3-11 (also Figure C-1 in Appendix C) shows the location and the name of the lysimeters.

The irrigation reports (HMC 2010a, 201la , 2012a , 2013a , 2014a and 2016) have presented the completion information with depths for the lysimeters a n d the litho l ogy of the alluvium at each lys i meter. Tables C-1 and C-2 in Appendix C present the soil moist u re concentration data collected from the lysimeters for the major and minor const i tuents respectively. Table 3-9 presents the yearly representative soil moist u re concentrations from each of the lysimeters. Samples from the lysimeters define the constituent concentrations in the soi l mo i sture at their respective depths but they do not define the amount of soil moisture or concentrations that will migrate to the groundwater table. Therefore , altho u gh the soi l moisture data reveals constit u ent concentrations in the soil profile , the groundwater quality data from we ll s provide a more useful and di r ect means of defining the current groundwater impacts. The successful collection of samples from the lys i meters a l so becomes increasingly difficult as the soil dries o u t and the l ysimeters may not remain operable.

3.5.1 Section

33 A tota l of eight l ysimeters were installed in Section 33 Center Pivot irrigation area. These lysimeters have been insta ll ed at five different l ocations. Figure 3-11 shows the five lysimeter locations in the Section 33 center pivot area. Lysimeters were placed in the a ll uvial mater i al above the basa l t except at t h e locat i ons L Y-3 a nd L Y-4 where lysimeters were also insta ll ed into the basalt. Lysimeters L Y-3 and LY-3M never y i elded a water samp l e. Figures C-2 through C-9 in Appendix C presents the plots of the soil mo i sture constituent concentrations for the Section 33 lysimeters. The uranium concentrat i ons in t h e Section 33 lysimeters are typically lower than the concentrations of the irrigation water and show a gradua l decreas i ng trend (Figure C-3 , C-5 , Gra nts R e cl a m a ti o n Proje c t 3-1 1 La nd App l i c ati o n Imp a ct A ssess m e nt and C-7 Appendi x C). Data from LY 4MU i s the e xception with uranium con c entration s abo v e the irrig ation water qualit y, however concentration s are d e clining (Fi g ure C-9 A ppendi x C). Selenium c oncentrations in the Secti o n 33 s oil moisture r e presented b y L Yl and L Y2 are higher than the irrigation water quality and s how increa s ing and de c rea s ing t rend s wi t h time (F i g u r e C-3 and C-5 Append ix C). Sel e nium concentrations s how an increa s ing trend in L Y 4 beginnin g in 201 land a simil a r increa s in g tr e nd i s obs e rv e d in the ch l orid e concentrations (Fi g ure C-6 a nd C-7 Appendix C). U ranium c oncentrations s ho w a decrea s in g trend in data al s o beginn i ng in 201 1. Table 3-9. Typica l Land Treatment Field Lysimeter Key Concentrations , in m2/I L YS I ME T E R NUM B E R YEA R U RA NIUM SE L ENIUM T D S SULFATE C H L ORIDE N I T R A T E M O LY BD ENUM LY34-I LY34-2 LY34-3 L Y28-I LY28-2 LY28-2M LY28-3 2010 2011 2012 2013 2014 2015 2010 2011 2012 2013 2014 2015 2010 2011 2012 2013 2014 2010 2011 2012 2013 2014 2015 2011 2012 2013 2014 2015 2010 201 1 2012 2013 2014 2010 201 1 2012 2013 2014 2015 G rant s Recla m at ion Project 0.33 0.06 SECTION 34 3500 4200 4800 4800 5400 5800 1 500 2000 2400 2400 2600 2750 0.35 0.08 0.35 0.35 0.34 0.26 0.22 0.38 0.08 0.1 0.1 0.06 0.3 0.27 0.4 0.39 0.4 0.2 0.16 0.2 0.1 8 0.08 0.07 0.78 0.65 0.3 0.16 0.06 0.04 0.34 0.34 0.38 0.33 0.8 0.6 1.2 1.2 0.6 0.5 0.06 0.05 0.07 0.08 0.06 4400 1 900 0.1 6 1 00 2900 0.06 4400 2200 0.05 4200 2000 0.06 4200 2000 0.01 4200 2500 0.08 2800 1 200 0.1 3 1 00 1100 0 18 5500 2600 0.14 4 300 1 900 0.16 4300 2000 SECT I ON 28 0.05 2700 1 300 0.07 2700 1 400 0.06 0.04 0.04 0.05 0.04 0.05 0.08 0.11 0.1 3 0.01 0.15 0.1 2 0.13 0.1 1 0.14 0.04 0.1 0.08 0.09 0.1 2900 2670 2 7 00 2900 6 1 00 5500 41 00 4500 4900 900 6000 6000 6700 6300 7000 5000 8000 8400 8500 8800 3-12 1300 1 200 1 300 1 500 3500 3200 2200 2500 3000 1 00 3200 3000 3300 3000 3500 2400 3600 4200 4 1 00 4250 La nd Applicat ion Imp act Assess m e n t 400 500 470 470 5 1 0 500 630 900 450 430 450 450 3 1 0 600 700 500 520 1 90 1 90 200 265 270 300 1 60 1 70 270 280 3 3 0 11 0 720 800 920 800 700 350 800 750 790 850 1 5 70 78 1 30 1 2 1 2 17 2 8 16 1 0 7 2 1 20 20 26 27 30 9 45 32 70 152 16 1 170 0.03 0.05 0.04 0.02 0.02 0.02 0.08 0.2 0.1 0.03 0.03 0.03 0.06 0.03 0.05 0.05 0.06 0.02 0.02 0.02 0.02 0.02 0.02 0.05 0.02 0.02 0.02 0.02 0.09 0.1 0.2 0.1 2 0.1 0.0 4 0.04 0.04 0.04 0.05 0.05 I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I Table 3-9. Land Treatment Field Lysimeter Key Concentrations, in mg/I (Continued)

LYSIMETER YEAR U RA NIUM SELENIUM TDS SULFATE C HLORID E NIT RAT E MOLYBDENUM NUM B E R S EC T I ON 33 LY! 2009 0.05 0.04 1 600 550 230 2 0.02 2010 0.05 0.11 2600 1200 350 1.3 0.02 2011 0.05 0.11 4100 1940 661 0.02 2012 0.05 0.15 4200 1 860 720 0.02 2013 0.05 0.18 4200 1820 880 6 0.02 20 1 4 0.03 0.1 3200 1 700 240 8 0.02 2015 0.03 0.1 2 3 500 1850 250 9 0.02 LY2 2011 0.063 0.16 4420 1980 493 0.03 20 1 2 0.05 0.1 5 4300 2000 500 0.02 20 1 3 0.06 0.15 4120 1 970 47 1 0.02 20 1 4 0.04 0.1 3 1 00 1500 270 1 6 0.02 LY4 2009 0.07 0.04 4200 2150 340 0.6 0.02 2010 0.08 0.05 4200 2 1 50 370 0.8 0.02 2011 0.03 0.08 3700 1900 500 0.02 20 1 2 0.03 0.1 3800 1800 540 0.02 2013 0.02 0.11 3480 1 790 579 1.1 0.02 2014 0.02 0.1 3 3700 1750 600 1.1 0.02 2015 0.01 0.15 3800 1850 630 1.9 0.02 LY4M U 2009 0.55 0.02 10000 5000 700 0.1 0.1 20 1 0 0.64 0.02 4 400 1000 740 3 0.04 20 11 0.65 0.02 4 300 1100 740 0.05 2012 0.59 0.02 4 100 1 200 750 0.06 2013 0.52 0.01 4 300 1240 770 8 0.06 20 1 4 0.44 0.02 4 450 1 200 750 9 0.07 2015 0.4 0.02 4 600 1300 790 8 0.09 LY4ML 2009 0.4 0.01 8000 3500 640 0.6 0.02 2010 0.4 0.02 3200 800 570 0.6 0.1 3.5.2 Section 34 Fo ur lysimeter s have been placed in the clay soi ls in Section 34 and 33 flood areas. Lys imeter s L Y34-1, L Y34-2 and L Y34-3 are in the Section 34 flood area while L Y34-4 is in the Section 33 flood area. Figure 3-11 shows the location of these ly s imeter s. Figures C-10 through C-15 in Ap pendi x C present the plots of t he soil moi s ture concentrations for the Section 34 l ysi meter s. T he uranium concentrations in the Section 34 soil moisture are gra duall y declining after termination of the land applicati o n irrigation program in this area. 3.5.3 Section 28 Fig ure 3-11 shows that five l ysimete r s were in s talled at three locations in Section 28. In addition to the allu via l lysimeter s at the L Y28-l and L Y28-2 lo ca tions , there are also two ba sa lt lysimeter (lysimeters L Y28-1M and L Y28-2M). Lysimeters L Y28-2 and L Y28-3 were reinstalled in 2011 w hile lysim ete r LY28-1M was not successfully washed out and made operable.

Tables C-1 and C-2 in Appendix C present the water quality re s ults obtained from the L Y28 ser ies oflysimeters.

Plots of the ly s imeter wate r qualit y are presented in F i g ure s C-16 through Grants Reclamation Project 3-1 3 Land Appl i cation Impact Assessment C-23. The uranium concentration in the Section 28 lysimeter samples have generally decreased since termination of irrigation in this area in 2012. Generally higher uranium concentrations were observed in the Section 28 lysimeters. 3.6 Soil Health Soil health was evaluated in the Land Application Closure Plan (HMC 2014b). Soil health considerations associated with the irrigation program are generally related to the effects of excess sodium on the soil's physical properties and salt buildup which can affect the ability of the soil to sustain vegetation or crops. The conclusions of this evaluation are summarized as follows:

• Based on the irrigation water quality , no long-term adverse effects related to sodium application in irrigation waters are ever expected to occur in these soils (see Tables A.1-1 , A.1-3 , A.2-1 and A.2-3 in Appendix A and Tables B.l-5 , B.1-6 , B.l-7 , and B.2-3 in Appendix B).

• The soil health , as related to salts and sodium, has not been adversely affected over the years , and is not expected to create long-term adverse effects when native vegetation is re-established.

3.7 Summary

of Soil Assessment The soil health of the HMC irrigated soils has not been significantly affected and formerly irrigated soils remain suitable for future agricultural uses. The maximum uranium soil concentration measured in irrigated areas was 5.15 mg/kg , far lower than the New Mexico screening level of 270 mg/kg for the protection of groundwater.

It is also lower than the most recent SSLs established by EPA in 2017 (16 mg/kg for residential land use, and 14 mg/kg to protect groundwater).

The maximum selenium soil concentration measured in irrigated areas is 1.32 mg/kg which is significantly less than the most restrictive NM SSL of 5.17 mg/kg. Although soil and soil moisture sample measurements reflect constituent concentrations within the soil profile , these data do not provide a measure of the rate and quality of irrigation area recharge to the groundwater.

Water quality sample data for wells in and adjacent to the land application areas is a more reliable measure of the groundwater impacts from the irrigation. Gran ts R ec l a m a tion P rojec t 3-1 4 Land A p plica tion lmpa c t Assess m e nt I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I CJ1. .,.. CJ1 !?>'='O Cb t) (0 '\. (0 ':l'f>I,

• CJ1 4 'b"-ro

• 15 SCALE: 1" = 900' C:\PllOISCT!l\2013-0l\IWW.T DATE: 1/8/13 'b'f>I, ro *5 @18 32 33 It:) t> ro'l5

• 2 150 AC CENTER PIVOT 9 robf,'b 32 o33 LEGEND LY1 EXISTING LYSDIETER LOCATION LY5 LYSDIETER LOCATION NEW ALLUVIAL MONITORING WELL DNE BASALT DOES NOT EXIST AT THIS LOCATION DEPTH TO TOP OF BASALT, FT 9 OBSERVED DEPTH TO TOP OF BASALT , FT 656 IRRIGATION SUPPLY WELL 33A-CROSS SECTION (liJ BASALT DOES NOT EXIST IN THIS AREA FIGURE 3-1. SECTION 33 DEPTH TO TOP or BASALT. HOMESTAKE MINING COMPANY GRANTS, NEW MEXICO LOCATION OF LYSDIETERS, ADDmONAL ALLUVIAL MONITORING wnu; AND CROSS SECTION. 3-1 5 33A 33A' 6560 657 --SECTION 33 CENTER PIVOT--1 551 553 907 6540 6520 6500 6480 6460 6420 6400 6380 6360 -LAND SURFACE .,,,. .... )'> .,,,..,,,.'7

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+ ... + ............ ]@ f [f Jlf llf lsASE OF ALLUVIUM CHINLE SHALE AILUVIAL BASALT BASE LIMITS or SANDSTONE

__ <;z__ QAl WATER LEVEL ...-EL£VATION (WU:) .,. ...... ...... / / /""'"., ...... ...... ///// ///// ///// ///// ///// ///// ///// .,,,..,,,. / / /-'---.,,,.-262' DEPTH l TO THE TOP OF SAN ANDRES , ... ,.. .. // // // // // .,,,..,,,.

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........ _ HOMESTAKE MINING COMPANY MIL.AN, NEW MEXICO LOWER CHINIE HYDRO-INCINllRJNC , LLC---DATE: 01/8/13 LIMITS or AQUIF'ER _ _":l_ LCH WU: f'IGURE 3-2. SECTION 33 GEOLOGIC CROSS SECTION 33A-33A' .... 3-1 6 I I I I I I I I I I I I I I I I I I I

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150 AC CENTER PIVOT 5 4 3015* 115:* oo f i 775

• 4 79400 sc.u. , ** 000* LEGEND C:\PltOISCT8'\IOIS-Ol\MSALT LY34-t LYWlld'l'D LOCA110M 868 ID:IGATIOM IUPPLY wmL .->" A&UfDOnD nu. .... 3000'1 .481400 D JO aAlil1' DOD NOT DlllT &T TBll LOCATION Dl:P'l'll

'IO TOP OP &U.UT , n 9 OIDllQD HPTll TO TOP Dr IAW.T , Pf MC-aoe8 llC'TIOM D.t.T'S! 1/0l/IS IOU. MOm'T'JD INITWUKIJfT LOCATION B.\MLT DOD MOT DlllT DI Tlll8 ADA ---FLOOD IRRIGATION 120 A C FLOOD "' @J in co 0 DN E 485400 ---1520' "' 0 O> 487400 FIGURE 3-3. SECTION 34 DEPTH TO TOP OF BASALT , LOCATION OF LYSIMETERS , ADDITIONAL ALLUVIAL MONITORING WELLS AND CROSS SECTION ---200' 489400 HOMESTAKE MINING COMPANY GRANTS , NR KUICO -

w 00 -6560 6540 6520 6500 6480 ..... "' :IE I t z 0 6460 ;:: ..... w 6440 6420 6400 6380 6360 SCALI: 1 *

• 550' 34C SE TION 33 "' tLOOD IRRIGATION CW43 LAND SU RFA C CW39 LY34-4 // LEGEND 'V CHINLE SHALE C:\itttOJ ECTS\2011-01\X..C D.t.Tt: 1/24/12 ------IC.ATION 34C' CW14 943 845 6560 CW37 LY34-1 6540 6520 6500 6480 ..... "' :IE BASE OF ALLUVIUM I t 6460 z 0 <J CHINLE SHALE -------704' DEPTH l TO THE TOP OF SAN ANDRES FIGURE 3-4. SECTION 34 GEOLOGIC CROSS SECTION 34C-34C' -------310' DEPTH l TO THE TOP OF MIDDLE CHINLE 6440 6420 6400 6380 6360 ;:: ... > w ..... w HOMESTAKE M I NING COMPANY GRANTS , NEW MEXICO -----

---

w ' 'D 0 ij 0 5 8 3 0 'O SCALI!: 1" = 500' C:\PllODC:l'S\IOIS-Of\IWW.T DATZ: 1/08/13 100 ACRE 14 ij 'O °-' ij o 7 0 10 '00:, 0 28B 0 12<0 FIGURE 3-5. SECTION 28 DEPTH TO TOP OF BASALT , LOCATION OF LYSIMETERS, ADDITIONAL ALLUVIAL MONITORING WELLS AND CROSS SECTION 0 0 ASANT VALLE / EST TES/// / / / co / co 7 LEGEND LY28-1L YSDlETER LOCATION SOD. MOISTURE INSTRUMENT LOCATION DNE BASALT DOES NOT BXIST AT TIDS LOCATION DEPTH TO TOP OF BASALT, FT 9 OBSERVED DBPTH TO TOP OF BASALT, FT 659 IRRIGATION SUPPLY WEU. 8B-CROSS SECTION / (/ J BASALT DOES NOT BXIST IN TIDS AREA HOMESTAKE MINING COMPANY GRANTS, NEW MEXICO

...J V) ::,; I t z 0 > ..... ...J ..... 6560 6540 6520 6500 6480 6460 6440 6420 6400 6380 6360 28B 28 CENTER PIVOT--28B' 659 881 886 CW-32 LAND SURFACE-, ;-;-77777 / / / / / / / / //////// //////// //////// //////// --ALLUVIAL BASE --i--ALLUVIUM Y28-2 Clay, Sand and Gravel ...... ...... / / / /

//////////////

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//////////////

OF ALLUVIUM ----------------------'Q. _L_CH --BASALT HOMESTAKE MINING COMPANY LIMITS or SANDSTONE MILAM, HEW MEXICO

// // // -----LOWER CHINLE HYDRO-ENGINEER/NC, LLC ---DATE: 01/8/13 LIMITS or AQUIFER __ 'q _ LCH WLE FIGURE 3-6. SECTION 28 GEOLOGIC CROSS SECTION 288-288 .... 3-2 0 I I I I I I I I I I I I I I I I I I I I_ -------------------

150 AC CENTER PIVOT + B .c *A

• 33-7 33-4

• 33-10

• 33-9 --LEGEND--t + BACl<GRClJND SAMPLE POINT

• PRE-IRRIGATION SOIL SAMPLE LOCATION N 24 AC FLOOD

• 33-1 3 4 3 S34-13 S34-9 S34-5* . S34-1 . S34-7

• S3-1 SCALE , 1* = 1500' DATE* 4/19/17 C*\PRDJECTS\2017-06

\D'JGS\SDILSAMP FIGURE 3-7. LOCATION OF PRE-IRRIGATION AND BACKGROUND SOIL SAMPLES IN THE SOUTH IRRIGATION AREAS VJ I N N 0 NE28-5 0 NE28-4 NE27-1 0 0 100 ACRE CENTER PIVOT + NE28-7 NE28-2 60 ACRE CENTER SCALE* I = 800' DollTEo 4/19/17 + c*\pro;.cts\2017-06\DVGS\SDILSAMP 0 0 S28-9 0 --LEGEND--

BACKGROUND SOIL SAMPLE LOCATION PRE-IRRIGATION SOIL SAMPLE LOCATION PLE SANT-V LLEY ESTA ES FIGURE 3-8. LOCATION OF PRE -IRRIGATION AND BACKGROUND SAMPLES IN THE NORTH IRRIGATION AREA -------------------

l_ -------------------

w t!.J w t N 32 33 150 AC CENTER PIVOT x x x x x x x x x x x xx x --LEG END--x x x x x X SECTION 34 FLOOD IRRIGATION SAMPLE POINT X SECTION 33 CENTER PIVOT SAMPLE POINT SECTION 33 FLOOD IRRIGA SAMPLE POINT LJ'd t 24 AC FLOOD 3 4 3 SCALE' 1* " !SOD' FIGURE 3-9. DATE* 4/19/17 C*\PROJECTS\2017

-06 \D'JGS\SOJLSAMP LOCATIONS OF SOIL SAMPLES IN THE SOUTH IRRIGATION AREAS 100 ACRE CENTER PIVOT 60 ACRE CENTER SCALE* 1 = 800' x DATEo 4/19/17 c*\pra,i-cts\2017

-06\D'WGS\SDILSAlf' x )Q< x x ")!.. x x x* x X xX XX XX Q x x x x ><x x * --LEGEND--

SOIL SAMPLE LOCATION PLE SANT-V LLEY ESTA ES FIGURE 3-1 0 , LOCATIONS OF SOIL SAMPLES IN THE NORTH IRRIGATION AREA -------------------

---

100 ACRE CENTER PIVOT / \ X LY3 150 AC CENTER PIVOT x LY4 LY4MU LY4ML X LYI \ LY3M X LYS 32 33 '-........_

\ ) LY2i1-t LY2B-1M x LY28-2H LY28-2 LY2B-3 x [.----,, \\x 24 AC ) CENTER PIVOT --FLOOD IRRIGATION 120 AC FLOOD ---HOMESTAKE MILL AND ADJACENT PROPERTIES

-GRANTS, NM -TD'w'NSHIP-118.12N, RANGE-lO'w' FIGURE 3-11. LOCATIONS OF THE SOIL MOISTURE LYSIMETERS IN THE IRRIGATION AREAS -----LARGE-TAIIJNGS-PILE DATE:9/6/17 SCALE: 1 "=1600' PAGE:

4.0 Assessment

of Groundwater Impacts Generall y, groundwater elevations in the land application areas are higher now than they were at the end of the irrigation program and this is primarily a result of other restoration activities.

This assessment is limited to potential impacts on groundwater quality. Figure 4-1 shows the locations of monitoring wells in each of the four former irrigation areas where time versus concentrations plots are presented in Appendices D , E and F respectively for the Sections 33 , 34 and 28 areas. The concentrations of the alluvial site standards are presented on the time series plots in these three appendices.

Site standards for the alluvial aquifer s et by the NRC and NMED are presented and discussed in Section 3 of the Annual Performance Reports (APR). Monitoring groundwater quality in the irrigated area is a very important part of assessing the impacts of the land application irrigation program. The map figures in Appendix D shows wells in Section 33 in addition to those that are shown in Figure 4-1 and other well locations for Section 34 are shown in Appendix E maps. Additional monitoring wells were added in Section 33 (wells 551 , 553 , and 554) in 2009 and in Section 34 (wells 555, 556 , 557) in 2010. As shown in Figure 4-1 , the well density for defining groundwater quality and the resulting groundwater monitoring program in Section 28 is adequate.

Groundwater monitoring data was used to identify and quantify any effects the irrigation program had on the groundwater system. Plots of concentrations versus time are presented for the irrigation area monitoring wells which are shown in blue on Figure 4-1 and wells upgradient of each irrigation area in a second time plot. The wells labeled in black on Figure 4-1 are the upgradient wells for each of the irrigation areas. While the soil sampling data discussed previously and presented in Appendix C are useful in confirming that measured COC concentrations are well below applicable regulatory levels or guidelines (such as SSLs), the groundwater monitoring program discussed in the following sections provides the most direct and reliable indication of irrigation impacts to the groundwater aquifers. The monitoring well data described in the following sections are the most useful information to assess the impacts to groundwater.

In contrast , the soil COC loading is only a qualitative indicator of the minor addition of COCs to the soil profile by irrigation.

4.1 Section

33 The likelihood of any groundwater impacts from irrigation can be assessed from the existing groundwater monitoring in the irrigation areas for Section 33 South pivot area (see Figure 4-1 for locations of wells 551 , 647 , 649 , 650 and 658 used in the time series plots) as shown in the groundwater monitoring data analysis (Appendix D). Additionally , the data described in Appendix D for the Section 33 irrigation area include the 24 acres of flood irrigation just south of the Valle Verde subdivision.

Irrigation in the Section 33 center pivot and flood irrigation areas ceased after the 2009 growing season , which therefore allowed the longest period of irrigation groundwater monitoring.

Figure D-1 in Appendix D shows the 2016 sulfate concentration contours for the alluvial aquifer in Section 33. All alluvial well sulfate concentrations are above 500 mg/Lin Section 33. The water quality sampling prior to 2000 and during the first few years can be interpreted as being representative of pre-irrigation (i.e., baseline) water quality since this was before the irrigation affects occurred in Section 33. The sulfate concentrations pre-and post-irrigation in the alluvial aquifer show little to no variation and were consistently above 500 mg/I. The sulfate Grants R ecla m atio n P rojec t 4-1 Land App li catio n Imp act Assess m e nt I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I concentrations in the alluvial aquifer in well 551 (located near the center of the pivot) have declined for the last two years to a level near the baseline sulfate concentration (see Figure D-2). Figure D-3 shows the similar sulfate concentrations in the wells upgradient of the Section 33 irrigation area. The TDS map and time plots (see Figures D-4 through D-6) show water quality results and trends that are very similar to tho s e observed for sulfate. Chloride (see Figures D-7 through D-9), which is considered a conservative constituent , shows concentration changes that are similar to those of sulfate and TDS. The monitoring of these three constituents shows that the Section 33 irrigation slightly affected the groundwater quality in this area but the small observed effects have nearly dissipated.

These concentrations in wells 649 and 650 likely are s till slightl y elevated from the irrigation in these areas and are expected to gradually decrease.

Uranium is considered the most important COC in the alluvial aquifer in all Off-site areas because it is the only constituent that exceeded the approved site standards for the alluvial aquifer in the Off-site areas. Concentration maps and time plot s are presented in Figures D-10 through D-12 of Appendix D. The 0.1 mg/L uranium contour in 2016 only extends into the northern portion of Section 32. The very small changes in uranium concentration in this area confirm that the uranium from the irrigation water did not migrate into the groundwater.

Selenium concentrations in the irrigation water also have not migrated to the Section 33 groundwater (see Figures D-13 through D-15). Molybdenum , nitrate , radium-226

+ radium-228 , vanadium and thorium-230 concentration s or activities in the irrigation water were low and Figures D-16 through D-26 are presented to illustrate that concentrations in the groundwater have remained low in this area with no discemable impacts by irrigation.

In conclusion , the irrigation program yielded only minor impacts to the sulfate , TDS and chloride concentrations in the alluvium and those impacts have dissipated resulting in near-background levels. No irrigation-related impacts have been observed with respect to the uranium , selenium , molybdenum , nitrate , radium-226

+ radium-228 , vanadium and thorium-230 concentrations or activities in the groundwater in Section 33. 4.2 Section 34 Figures 1-1 and 4-1 show the location of the Section 34 flood irrigation area. The discussion , concentration maps and concentration versus ti me plots are presented in Appendix E. Irrigation in this area ceased after the 2012 growing sea s on. Figure E-1 in Appendix E show s the location of the 120-acre flood irrigation area in Section 34. Alluvial groundwater is flowing to the west and northwest in the Section 34 area toward the Section 28 area. This figure also shows the 2016 s ulfate concentration contours for the alluvial aquifer. The pre-and post-irrigation sulfate concentrations in the alluvial aquifer were above 1000 mg/I. While the sulfate concentrations measured in wells 555 and 844 exceed the site standard of 1500 mg/I , recent measurements show a declining trend. Thus , any minor impacts that may have resulted from the irrigation program are expected to la st for only a few years. The sulfate concentration at well 846 exceeded the alluvial aquifer site standard of 1500 mg/I prior to the start of irrigation , and therefore the slightly higher concentration cannot be due to the irrigation program (Figure E-2). Figure E-3 s hows that the recent sulfate concentrations in the wells upgradient (see Figure 4-1 for well locations) of the Section 34 irrigation area are less than those in the irrigation area. The TDS concentration map and time plot (see Figures E-4 through E-6) show water quality changes that are very similar to those observed for sulfate. The TDS concentration s in wells 844 and 845 increased for a few years from 2011 through 2014. However , the TDS concentrations have Gra n ts R e clam a ti o n Proj ec t 4-2 La nd A ppli cation Imp ac t Assessme n t declined over the last couple of years , and any measurable impacts that may be attributable to the irrigation program are diminishing.

Chloride (see Figures E-7 through E-9), which is a conservative constituent , shows concentration changes that are similar to those of sulfate and TDS. Chloride concentrations exceed the alluvial site standard of 250 mg/I at wells 844 , 845 and 555 , but a recent decline in these concentration s also indicates that measurable impacts that may be attributable to the irrigation program are diminishing.

Uranium is the most important COC in the alluvial aquifer in this area. Concentration maps and time plots are presented in Figures E-10 through E-12 of Appendix E. With the exception of a single sample for well 556 , all of the recently measured Section 34 alluvial uranium concentrations are below the alluvial site standard of 0.16 mg/I. The site standard concentration is shown on Figures E-11 and E-12 in Appendix E. The time plot shows that the uranium concentration in well 844 had increased to a level slightly above the site standard in 2012 , but has since declined to below 0.1 mg/I. The timing of the uranium concentration increase in well 844 suggests that at lea s t s ome portion of the increase could have been attributable to the irrigation program. However, s ome of the change in uranium concentration in this well was likel y due to varying concentrations in the upgradient alluvial groundwater.

The higher uranium concentration in well 556 in 2016 is thought to be an outlier and was not confirmed by a sample collected in 2017. Therefore , the anomalous result in we! I 556 is not considered significant.

Water quality measurements in monitoring wells in Section 34 indicate that selenium has not migrated to groundwater as a result of the irrigation program (see Figures E-13 through E-15). The changes in selenium in well 846 are believed to be a result of historical seepage from impacts upgradient from the well and are not thought to be a function of the Section 34 irrigation due to the large distance between the well and irrigated area. Molybdenum, nitrate , radium-226

+ radium-228 , vanadium and thorium-230 concentrations in the irrigation water were low and Figures E-16 through E-26 are presented to illu s trate that concentrations in the groundwater have remained low. In conclusion , the data suggest small impacts to groundwater in Section 34 that may be attributable to the irrigation program , and that any such impact was relatively minor and is diminishing to levels consi s tent with background. The declining trends that best illustrate the recent changes in groundwater quality in Section 34 are shown in Figure E-11 with Figure E-8 showing similar trends. As shown in Figure E-11 , the maximum uranium concentration in well 844 occurred in 2012 with decreasing concentrations thereafter.

Groundwater quality in this area will continue to be monitored as part of HMC's monitoring efforts. 4.3 Section 28 The Section 28 pivot is located in an area underlain by groundwater that had previously been impacted by seepage from the Large Tailings Pile (L TP). This area has been referred in numerous HMC reports as the " North Off-Site Area." Therefore , groundwater impacts from the irrigation program are difficult to distinguish from the pre-existing elevated concentrations of COCs in this area. A discussion , concentration maps and concentration versus time plots are presented in Appendix F for the North pivot (Section 28) irrigation area. Irrigation in this area ceased after the 2012 growing season. Figure F-1 in Appendix F and Figure 4-1 shows the 100-acre center pivot in Section 28. This figure also shows the 2016 sulfate concentration contours for the alluvial aquifer. The pre-irrigation 1000 mg/I contour for sulfate in the alluvial aquifer extended to the west of the center pivot while the 2016 contour only extends to the eastern G r a n ts R ecla m a t i on Pro ject 4-3 La nd A p plicat ion Imp act Assess m e nt I I I I I I I I I I I I I I I* I I I I I I I I I I I I I I I I I I I I I I I portion of the North pivot. The sulfate concentrations in the alluvial aquifer in the northern and southern portions of the North pivot area are lower than those in the middle of the pivot (near well 886). It is impossible to determine from existing data whether a small increase in the sulfate concentrations is due to the North pivot irrigation or due to the effects from the higher concentrations that have migrated to this area from the east (see Figures F-2 and F-3). Figure 4-1 shows the locations of wells used in both of these figures. Some of the lower sulfate concentrations observed in wells 884 and 886 were due to the lower sulfate in injection water from well 951. The TDS map and time plot (see Figures F-4 through F-6) show very similar results as those observed for sulfate with the 2000 mg/I contour extending to the west of the North pivot. Chloride (see Figures F-7 through F-9), which is a conservative constituent , shows similar results as sulfate and TDS, with only one value in the North pivot area still above 200 mg/I. Uranium is the important constituent and the only constituent requiring restoration in the alluvial aquifer in this area. A map of the uranium concentrations in this area is presented in Figure l 0 and time plots of these concentrations are presented in Figures F-11 and F-12 in Appendix F. The 0.1 mg/I uranium contour depicted for 2016 extended west of the North pivot , but the concentrations west of the North pivot have been significantly reduced by the restoration program. Measured selenium concentrations in the area are also at levels where potential irrigation impacts would be indistinguishable from the seepage impacts in the North Off-Site area (see Figures F-13 and F-15). Molybdenum , nitrate , radium-226

+ radium-228 , vanadium and thorium-230 concentrations in the irrigation water were low and Figures F-16 through F-26 are presented to illustrate that concentrations have remained small in the groundwater in this area. In conclusion , measurable impacts to groundwater from the irrigation program in Section 28 are indeterminable.

However , it is reasonable to assume that , due to the similarities between the soils in Sections 28 and 33, the application of water containing elevated levels of uranium and selenium would not have adversely affected the groundwater in any significant way. Furthermore , the groundwater in the North Off-Site area is currently being remediated by HMC and the remediation is expected to continue in t his area for another two or three years. G rant s R e clam a tion Proj ec t 4-4 La nd Application Imp act A ssess m e nt

-100 ACRE CENTER PIVOT \ 150 AC CENTER PIVOT

• _,./ "--\ J [------,, \\ 24 AC ) CENTER PIVOT LARGE-TAIIJNGS-PILE

• LEGEND AREA MONITORING

\v'ELLS 3 UPGRADIENT MONITORING

\v'ELLS HOMESTAKE MILL AND ADJACENT PROPERTIES

-GRANTS, NM -TD'w'NSHIP-118.12N, RANGE-10\J DATE:9/18/17 FIGURE 4-1. LOCATIONS OF IRRIGATION GROUNDWATER MONITORING WEU.S SCALE: 1 *=1800' PAGE: ------------------

I I I I I I I I I I I I I I I I I I I 5.0 Human Health Assessment

-Impacts to the Public from Irrigation Activities

5.1 Radiological

Health Assessment This Section summarizes the results of an assessment of potential radiological impacts to the public associated with irrigation activities.

The assessment involves modeling of doses for two conservative (worst-case) exposure scenarios.

Doses to a member of the public due to assumed maximum net (above background) soil concentrations of uranium and its decay products, along with radium-228, were modeled using the RESRAD-OFFSITE computer code (ANL, 2016) for a rural residential farming scenario (considered to be the most conservative receptor scenario for unrestricted release land use). Although a resident farmer scenario was chosen for this assessment to represent the maximum plausible exposure to any member of the public, agricultural land use is not included in HMC's plans for the former land application areas. A detailed presentation of this modeling, including exposure pathways, model parameters and results, is provided in Appendix G. Receptor Exposure Modeling Scenarios Two site-specific resident farmer scenario layouts in RESRAD for the Section 34 flood irrigation area were modeled as shown in Figure G-1 (Appendix G). The Section 34 flood irrigation area was evaluated because soil concentrations are highest in this area. Both receptor scenarios modeled doses to a farmer living and working in the vicinity of a . contamination zone representing the Section 34 flood irrigation area (approximately 120 acres). The differences in the two scenarios primarily involve the location of the resident farmer's dwelling site. In both instances, direct or indirect consumption of plant life grown on the irrigated area is assumed, although the nature and size of the area would place substantial limitations on what could be grown, which essentially would be grain for cattle feed. The first receptor scenario (Scenario

1) places the farmer's home just outside and east/northeast of the contaminated zone, a downwind location relative to the Section 34 flood irrigation area and the strongest prevailing wind directions (Figure G-1). Scenario 1 is intended to conservatively model radiological doses to a hypothetical maximally exposed member of the public (in this case a resident farmer) from exposure pathways that could have existed during the period that land application irrigation was being conducted (2000 -2012). Agricultural fields are assumed to be grown on contaminated soils within the Section 34 flood irrigation area, and the resident farmer derives some sustenance (plant foods and livestock meat) from these agricultural areas. While this modeling assumption is not known to have occurred during the land application project, it is conservative in terms of evaluating exposures that could conceivably have occurred during the project. The second receptor scenario (Scenario

2) places the resident farmer's home at the center of the contaminated zone (Figure G-1 ), a circumstance that is unlikely to occur in the future. Under this scenario, both the receptor's dwelling site and all agricultural fields are situated within the zone of contaminated soils (representing the former Section 34 flood irrigation area). Scenario 2 represents the maximum possible radiological exposures to contaminated soils within the Section 34 flood irrigation area, i.e., a worst case scenario that is unlikely to occur in the future. Grants Reclamation Project 5-1 Land Application Impact Assessment Model Input P_arameters The assumed exposure/dose pathways and model input parameters are detailed in Appendix G. Generally applicable RESRAD-OFFSITE default values were used for most model parameters, but site-specific values were used where appropriate to adequately represent each receptor scenario and/or where site-specific data were available.

• Modeling Results and Conclusions The maximum total radiological dose to the resident farmer under Scenario I was less than 0.1 mrem/yr. The primary implication of this result is that the maximum potential dose to any member of the public living adjacent to any of the land application areas during the period that irrigation was conducted (between 2000 and 2012) would have been insignificant relative to the operational public dose limit given in 10 CFR 20.1301 (100 mrem/yr).

The maximum total radiological dose to the resident farmer under Scenario 2 was approximately 0.3 mrem/yr. The primary implication of this result is that the maximum potential dose to any future member of the public who may decide to build a dwelling within any of the land application areas and engage in sustenance farming would be insignificant relative to the dose limit for license termination and unrestricted future land use as given in 10 CFR 20.1402 (25 mrem/yr).

,, Under either of the above receptor scenarios, the potential dose to any member of the public(< 1 mrem/yr) would be negligible relative to the average radiation dose to the U.S. population from exposure to natural background radiation sources, estimated at 320 mrem/yr (NCRP, 2009). The maximum modeled dose to a maximally exposed member of the public as a result of the land application irrigation project is comparable to. the average radiation dose to the public from cooking with natural gas(< I mrem/yr).

5.2 Non-Radiological Health Assessment With respect to non-radiological impacts to human health, receptor exposures to metals or metalloids introduced by the land application irrigation project warrant evaluation, and the biological effects of concern are based on toxicity with respect to cancer risk or other health detriments.

This evaluation compared measured concentrations in soil against SSLs established by applicable regulatory agencies (NMED and/or EPA). These screening levels limit soil concentrations to levels determined by the agencies to be protective of human health. A detailed description of these comparisons is provided in Section 3.4 of this Report, and soil uranium and selenium concentrations are well below any applicable SSL. The conclusion of this assessment is that non-radiological constituents in the groundwater used to irrigate the land application areas do not pose significant health concerns, either past, present or future. 5.3 Suminary Potential radiation doses to the public were evaluated for:

• A hypothetical resident farmer living adjacent to the irrigated areas and deriving some sustenance from cultivation of crops and livestock in the Section 34 irrigated area (to represent maximum plausible public dose during the land application project);

and Grants Reclamation Project 5-2 Land Application Impact Assessment I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I

• A hypothetical resident farmer, living on and farming the Section 34 irrigated area (to represent maximum plausible public dose in the future) Each analysis shows that the radiological dose to past, present or future occupants of the land on and near the irrigation areas is negligible relative to applicable dose limits given in 10 CFR 20.1301 and 10 CFR 20.1402, and is extremely low (less than one percent) compared to the average dose that the population receives from natural background radiation exposures.

Grants Reclamation Project 5-3 Land Application Impact Assessment

6.0 Conclusions

Uranium and selenium concentrations increased in the upper few feet of the irrigated soils. The human health and safety impact of these increases is addressed in the last two paragraphs of this section. Constituent concentration increases in the soils have not been large enough to affect the soil health so future agricultural uses of these land application areas has not been impacted.

Constituent concentrations in the soil moisture samples from the lysimeters are not a direct measurement of groundwater impacts and therefore no conclusions relating to health and safety impacts to the public or future land uses were made from this data. Like the soil chemistry data, the lysimeter samples indicated constituent concentration increases in the upper few feet of the soil profile. However, the movement of these constituents through the soil profile is very slow and will not reach the groundwater at rates that would cause groundwater levels to exceed applicable site standards.

The groundwater quality results are a direct measurement of the groundwater impacts. The monitoring of the groundwater quality in the areas of the land application indicates the following:

1. A small increase in sulfate, TDS and chloride concentrations was observed in the Section 33 pivot due to the irrigation.

However, the small increases have nearly dissipated and no increase in uranium and selenium concentrations in the groundwater resulted from the irrigation.

2. Small groundwater impacts resulted from the Section 34 flood irrigation and those slight increases in the constituent concentrations in groundwater are gradually dissipating.

3. A small increase in sulfate, TDS and chloride concentrations in the groundwater likely occurred during the irrigation of the Section 28 center pivot area, but the increases were masked by the seepage impacts from the LTP. 4. The long-term irrigation impacts to sulfate, TDS and chloride concentrations in the groundwater should be so small that they are not detectable in the Section 28 center pivot area. 5. No measurable increase in uranium and selenium concentrations in the groundwater should result from the Section 28 center pivot irrigation.

The monitoring of concentrations of uranium and selenium will continue as part of the ongoing groundwater monitoring program. Residual concentrations of uranium and selenium associated with land application irrigation in the upper layers of irrigated soils are.significantly below any applicable SSLs, including those established in 2017 by NMED and by EPA. In terms of toxicological risks to human health, the soil sampling data confirm that the levels of these and other constituents from irrigation water have resulted in soil concentrations that are negligible.

Similarly, the maximum plausible radiological dose to any member of the public(< 1 mrem/yr) is well below applicable public dose limits given in 10 CFR 20.1301 and 20 .1402 and is also within the variabilify in natural background doses to the U.S public (about 320 mrem/yr on average).

Residual concentrations of uranium and selenium in soil associated with the land application irrigation project occur only within the upper few feet of the soil profile and are not migrating Grants Reclamation Project 6-1 Land Application Impact Assessment I I I I I I I I I I I I I I I I I I I I I I I ! I I I I I I I I I I I I I I I deeper into the soil profile. Both constituents, along with trace amounts of other measured water quality parameters occur at levels below any applicable SSLs or other regulatory criteria.

Grants Reclamation Project 6-2 Land Application Impact Assessment

7.0 References

Argonne National Laboratory (ANL). 2016. RESRAD-OFFSITE for Windows. Version 3.2. Homestake Mining Company, Environmental Restoration Group and Hydro-Engineering, February 1999, Evaluation of the Use of Alluvial Ground Water for Irrigation, Consulting Report for Homestake Mining Company, Grants, New Mexico. Homestake Mining Company, Environmental Restoration Group and Hydro-Engineering, 2001a, Evaluation of the Year 2000 Irrigation with Alluvial Ground Water, Consultants Report for Homestake Mining Company, Grants, New Mexico. Homestake Mining Company and Hydro-Engineering, L.L.C., 2001b, Ground-Water Monitoring and Performance Review for Homestake's Grants Project, NRC License SUA-1471, and Discharge Plan DP-200, 2000. Consulting Report for Homestake Mining Company of California.

Homestake Mining Company and Hydro-Engineering, L.L.C., 2002, Ground-Water Monitoring and Performance Review for Homestake's Grants Project, NRC License SUA-1471, and Discharge Plan DP-200, 2001. Consulting Report for Homestake Mining Company of California.

Homestake Mining Company and Hydro-Engineering, L.L.C., 2003, Ground-Water Monitoring and Performance Review for Homestake's Grants Project, NRC License SUA-1471, and Discharge Plan DP-200, 2002. Consulting Report for Homestake Mining Company of California.

Mining Company, Environmental Restoration Group and Hydro-Engineering, 2004a, Evaluation of the Year 2000 Through 2003 Irrigation with Alluvial Ground Water, Consultants Report for Homestake Mining Company, Grants, New Mexico. Homestake Mining Company and Hydro-Engineering, L.L.C., 2004b, Grants Reclamation Project, 2003 Annual Monitoring Report/Performance Review for Homestake's Grants Project Pursuant to NRC License SUA-1471 and Discharge Plan DP-200. Consulting Report for Homestake Mining Company of California.

Homestake Mining Company, Environmental Restoration Group and Hydro-EI?-gineering, 2005a, Evaluation of the Year 2000 Through 2004 Irrigation with Alluvial Ground Water, Consultants Report for Homestake Mining Company, Grants, New Mexico. Homestake Mining Company and Hydro-Engineering, L.L.C., 2005b, Grants Reclamation Project, 2004 Annual Monitoring Report/Performance Review for Homestake's Grants Project Pursuant to NRC License SUA-1471 and Discharge Plan DP-200. Consulting Report for Homestake Mining Company of California.

Grants Reclamation Project 7-J I Land Application Impact Assessment I I I I I I I I I I I I I I I I I I I I I I I ,I :. I I I I I I I I I I I I I Homestake Mining Company, Environmental Restoration Group and Hydro-Engineering, 2006a, Evaluation of the Year 2000 Through 2005 Irrigation with Alluvial Ground Water, Consultants Report for Homestake Mining Company, Grants, New Mexico. Homestake Mining Company and Hydro-Engineering, L.L.C., 2006b, Grants Reclamation . Project, 2005 Annual Monitoring Report/Performance Review for Homestake's Grants Project Pursuant to NRC License SUA-1471 and Discharge Plan DP-200. Consulting Report for Homestake Mining Company of California.

Homestake Mining Company, Environmental Restoration Group and Hydro-Engineering, 2007a, Evaluation of the Year 2000 Through 2006 Irrigation with Alluvial Groundwater, Consultants Report for Homestake Mining Company, Grants, New Mexico. Homestake Mining Company and Hydro-Engineering, L.L.C., 2007b, Grants Reelamation Project, 2006 Annual Monitoring Report/Performance Review for Homestake's Grants Project Pursuant to NRC License SUA-1471 and Discharge Plan DP-200. Consulting Report for Homestake Mining Company of California.

Homestake Mining Company, Environmental Restoration Group and Hydro-Engineering, 2008a, Evaluation of the Year 2000 Through 2007 Irrigation with Alluvial Ground Water, Consultants Report for Homestake Mining Company, Grants, New Mexico. Homestake Mining . Company and Hydro-Engineering, L.L.C., 2008b, Grants Reclamation Project, 2007 Annual Monitoring Report/Performance Review for Homestake's Grants Project Pursuant to NRC License SUA-1471 and Discharge Plan DP-200. Consulting Report for Homestake Mining Company of California.

Homestake Mining Company, Environmental Restoration Group and Hydro-Engineering, 2009a, Evaluation of the Year 2000 Through 2008 Irrigation with Alluvial Ground Water, Consultants Report for Homestake Mining Company, Grants, New Mexico. Homestake .Mining Company and Hydro-Engineering, L.L.C., 2009b, Grants Reclamation Project, 2008 Annual Monitoring Report/Performance Review for Homestake's Grants Project Pursuant to NRC License SUA-1471 and Discharge Plan DP-200. Consulting Report for Homestake Mining Company of California.

Homestake.Mining Company, Environmental Restoration Group and Hydro-Engineering, 2010a, Evaluation of the Year 2000 Through 2009 Irrigation with Alluvial Ground Water, Consultants Report for Homestake Mining Company, Grants, New Mexico. Homestake Mining Company and Hydro-Engineering, L.L.C., 2010b, Grants Reclamation Project, 2009 Annual Monitoring Report/Performance Review for Homestake's Grants Grants Reclamation Project 7-2 Land Application Impact Assessment Project Pursuant to NRC License SUA-1471 and Discharge Plan DP-200. Consulting Report for Homestake Mining Company of California.

Homestake Mining Company, Environmental Restoration Group and Hydro-Engineering, 201 la, Evaluation of the Year 2000 Through 2010 Irrigation with Alluvial Ground Water, Consultants Report for Homestake Mining Company, Grants, New Mexico. Homestake Mining Company and Hydro-Engineering, L.L.C., 201 lb, Grants Reclamation Project, 2010 Annual Monitoring Report/Performance Review for Homestake's Grants Project Pursuant to NRC License SUA-1471 and Discharge Plan DP-200. Consulting Report for Homestake Mining Company of California.

Homestake Mining Company, Environmental Restoration Group and Hydro-Engineering, 2012a, Evaluation of the Year 2000 Through 2011 Irrigation with Alluvial Ground Water, Consultants Report for Homestake Mining Company, Grants, New Mexico. Homestake Mining Company and Hydro-Engineering, L.L.C., 2012b, Grants Reclamation Project, 2011 Annual Monitoring Report/Performance Review for Homestake's Grants Project Pursuant to NRC License SUA-1471 and Discharge Plan DP-200. Consulting Report for Homestake Mining Company of California.

• Homestake Mining Company, Environmental Restoration Group and Hydro-Engineering, 2013a, Evaluation of the Year 2000 Through 2012 Irrigation with Alluvial Ground Water, Consultants Report for Homestake Mining Company, Grants, New Mexico. Homestake Mining Company, 2013b, Decommissioning and Reclamation Plan Update 2013b, NRC Source Materials License SUA-1471, Grants, New Mexico. Homestake Mining* Company and Hydro-Engineering, L.L.C., 2013c, Gnmts Reclamation Project, 2012. Annual Monitoring Report/Performance Review for Homestake's Grants Project Pursuant to NRC License SUA-1471 and Discharge Plan DP-200. Consulting Report for Homestake Mining Company of California.

Homestake Mining Company, Environmental Restoration Group and Hydro-Engineering, 2014a, Evaluation of the Year 2000 Through 2013 Irrigation with Alluvial Ground Water, Consultants Report for Homestake Mining Company, Grants, New Mexico. Homestake Mining Company, Environmental Restoration Group, Hydro-Engineering and RIMCON, 2014b, Land Application Closure Plan, Report Submitted to NMED and NRC, Grants, New Mexico. Homestake Mining Company, Environmental Restoration Group and Hydro-Engineering, .2016, Grants Reclamation Project 2015 Monitoring of Former Irrigation Areas, Consultants Report for Homestake Mining Company, Grants, New Mexico. Grants Reclamation Project 7-3 Land Application Impact Assessment I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I EPA, 2003. EPA Assessment of Risks from Radon in Homes. June 2003, Office of Radiation and indoor Air, U.S. Environmental Protection Agency, Washington, DC 20460. EPA, 2013. Draft Human Health Risk Assessment, Homestake Mining Co. Superfund Site, Cibola County, New Mexico. Risk and Site Assessment Section, United States Environmental Protection Agency, Region 6, June. EPA, 2016. EPA Draft Remedial Investigation Report. June 2016, Homestake Mining Company Superfund Site, U.S. Environmental Protection Agency, Washington, DC 20460. U.S. Environmental Protection Agency (EPA). 1989. Risk Assessment Guidance for Superfund, Volume I: Human Health Evaluation Manual (Part A). Interim Final. EPA/540/1-89/002.

December.

U.S. Environmental Protection Agency (EPA). 1996. Soil Screening Guidance:

Technical Background Document.

EPA/540/R95/128.

New Mexico Environment Department (NMED, 2017). Risk Assessment Guidance for Site Investigations and Remediation.

March 201 7. National Council on Radiation Protection and Measurements (NCRP). 2009. Ionizing Radiation Exposure of the Population of the United States. NCRP Report No. 160. NRC, 1992, NUREG/CR 5512: Residual Radioactive Contamination from Decommissioning, Final Report, U.S. Nuclear Regulatory commission, Washington, D.C. NRC, 2000. National Research Council, 2000, "Nutrient Requirements for Beef Cattle." National Academy Press, 500 Fifth Street NW, Lockbox 285, Washington, DC 20055. RIMCON and Hydro-Engineering, 1998. Soil Characterization and Attenuation Studies. Prepared for Homestake Mining Company, Grants, New Mexico. Grants Reclamation Project 7-4 Land Application Impact Assessment

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I I I I I I I I I I APPENDIX A IRRIGATION WATER QUALITY I I I I I I I I I L ____

I I I I I I I I I I I I I I I I I I I A.O A.I A.1-1 A.1-2 A.1-3 A.1-4 A.2-1 A.2-2 A.2-3 A.2-4 APPENDIX A TABLE OF CONTENTS IRRIGATION WATER QUALITY Page Number SOUTH IRRIGATION WATER SUPPLY ..........................................................................

A-1 NORTH IRRIGATION WATER SUPPLY ...........................................................................

A-1 TABLES Page Number WATER QUALITY FOR SOUTH IRRIGATION SUPPLY, MAJOR CONSTITUENTS.A-2

' WATER QUALITY FOR SOUTH IRRIGATION SUPPLY, MINOR CONSTITUENTS .A-5 WATER QUALITY FOR THE SOUTH IRRIGATION SUPPLY WELLS, MAJOR CONSTITUENTS

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A-8 WATER QUALITY FOR THE SOUTH IRRIGATION SUPPLY WELLS, MAJOR CONSTITUENTS

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A-59 WATER QUALITY FOR NORTH IRRIGATION SUPPLY, MAJOR CONSTITUENTS

..... . .............................................................................................................................................

A-97 WATER QUALITY FOR NORTH IRRIGATION SUPPLY, MINOR CONSTITUENTS

...... . ..............................................................

............................................................................

A-100 WATER QUALITY FOR THE NORTH IRRIGATION SUPPLY WELLS, MAJOR CONSTITUENTS

...................................................................................... ........ A-103 WATER QUALITY FORTHE NORTH IRRIGATION SUPPLY WELLS, MAJOR CONSTITUENTS

...............................................................................................

A-120 Grants Reclamation Project A-i Land Application Impact Assessment A.O South Irrigation Water Supply The South irrigation water was supplied by the South Off-site collection wells and piped to one of the South irrigation areas. The location of these collection wells is defined in Section 2 of this report. Table A.1-1 presents a tabulation of the water quality for the major constituents for the South irrigation water supply. The yearly average of the TDS, sulfate and chloride concentration (in units of mg/I) varied from 1546 to 1711, 624 to 739 and 107 to 167 respectively for the South irrigation water while the uranium and selenium varied from 0.12 to 0.29 and 0.04 to 0.12 respectively (see Table A.1-2).

• Additional South irrigation water quality data for the individual supply wells is tabulated in Tables A.1-3 and A.1-4 for the major and minor water quality parameters.

This data is useful because it presents additional water quality for some of the minor constituents to show the low levels in the supply wells.

• A.I North Irrigation Water Supply The North irrigation water was supplied by wells from the North Off-site area in Sections 27 and 28 (see Section 2 of this report for locations).

Table A.2-1 presents a tabulation of the water. quality for the major constituents for the North irrigation water supply. The yearly average of the TDS, sulfate and chloride concentrations, in units of mg/I, varied from 1409 to 2122, 608 to 936 and 121 to 189 respectively for the North irrigation water while the uranium and selenium varied from 0.14 to 0.39 and 0.03 to 0.08 respectively (see Table A.2-2). Additional North irrigation water quality data for the individual supply wells is tabulated in Tables A.2-3 and A.2-4' for the major and minor water quality parameters.

This data is useful because it presents additional water quality data for some of the minor constituents to show the low levels in the supply wells. *

• Grants Reclamation Project A-1 Land Application Impact Assessment I I I I I I I I I I I I I I I I I I

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Table A.1-1 Water Quality of the South Irrigation Major Constituents Sample Point Ca Mg K Na HC03 C03 Cl 504 TDS Cond(calc.)

lon_B Name Date Lab (mg/I) (mg/I) (mg/I) (mg/I) (mg/I) (mg/I) (mg/I) (mg/I) (mg/I) (micromhos/ (ratio) IRR 33/34 9/15/1999 HMC 9/15/1999 HMC 9/15/1999 HMC 9/15/1999 HMC 9/15/1999 HMC 5/3/2000 ENER 684 1460 712612000 ENER 619 1510 712812000 ENER 649 1520 8/6/2000 ENER 105 650 1530 8/15/2000 ENER 106 660 1550 8/18/2000 ENER 115 623 1570 8/19/2000 ENER 109 612 1550 8/24/2000 ENER 106 608 1530 812712000 ENER 103 601 1530 8/29/2000 ENER 109 624 1580 9/2/2000 ENER 104 615 1550

• 9/6/2000 ENER 696 1600 9/9/2000 HMC 114 670 1630 4/20/2001 ENER 120 693 1620 5/6/2001 ENER 108 597 1630 5/10/2001 ENER 103 580 1590 5/19/2001 ENER 118 660 1590 5/24/2001 ENER 116 664 1500 6/3/2001 ENER 118 665 1610 6/10/2001 ENER 113 659 1570 6/28/2001 ENER 104 661 1530 7/5/2001 ENER 93.6 655 1480 7/24/2001 ENER 120 650 1460 8/29/2001 ENER 114 693 1600 A-2 l __

Table A.1-1 Water Quality of the South Irrigation (cont'd.)

Major Constituents Sample Point Ca Mg K Na HC03 C03 Cl 804 TDS Cond(calc.)

lon_B Name Date Lab (mg/I) (mg/I) (mg/I) (mg/I) (mg/I) (mg/I) (mg/I) (mg/I) (mg/I) (micromhos/ (ratio) IRR 33/34 9/1/2001 ENER 128 573 1610 9/1/2001 ENER 121 561 1570 9/17/2001 ENER 99.8 634 1600 4/15/2002 ENER 125 708 1510 4/16/2002 ENER 129 704 1580 5/8/2002 ENER 678 1600 5/8/2002 ENER # 737 # 1580 5/14/2002 ENER 120 741 1560 7/3/2002 ENER 135 694 1560 7/31/2002 ENER 123 678 1580 10/2/2002 ENER 703 1570 5/14/2003 ENER 98.5 663 1390 9/18/2003 ENER 732 1600

• 2142 5/4/2004 ENER 130 703 1550 *2078 5/27/2004 ENER 130 690 1570

• 2000 8/18/2004 ENER 693 1530

• 2100 10/6/2004 ENER 133 629 1560

• 2087 4/20/2005 ENER 235 996 1510

• 2110 5/25/2005 ENER 131 603 1580

• 2124 8/8/2005 ENER 621 1500

• 2163 9/26/2005 ENER 124 659 1550

• 2100 10/11/2005 ENER 125 612 1580

• 2158 4/10/2006 ENER 134 654 1520

• 2297 6/26/2006 ENER 192 875 2000

• 2828 8/14/2006 ENER 696 1580

• 2257 10110/2006 ENER 128 639 1500

• 2266 4/12/2007 ENER 136 668 1630

• 2170 4/30/2007 ENER 132 670 1580

• 2168 6/4/2007 ENER 125 654 1540

• 2140 # Signifies Quality Control Sample

• Signifies Specific Conductivity from HMC A-3 -------------------

---

Table A.1-1 Water Quality of the South Irrigation (cont'd.)

Major Constituents Sample Point Ca Mg K Na HC03 C03 Cl S04 TDS Cond(calc.)

lon_B Name Date Lab (mg/I) (mg/I) (mg/I) (mg/I). (mg/I) (mg/I) (mg/I) (mg/I) (mg/I) (micromhos/ (ratio) IRR 33/34 8/20/2007 HMC 2245 8/21/2007 ENER 678 1600 10/22/2007 ENER 143 661 1570

• 2207 4nt2008 ENER 160 683 1550

• 2216 4/21/2008 ENER 99.0 687 1430

• 1867 6/2/2008 ENER 142 728 1560

• 2216 '

ENER 148 710 1660

• 2140 5/6/2009 ENER ---146 669 1560

• 2172 6/16/2009 ENER 160 717 1660

• 2343 11/1/2010 HMC 2450 8/22/2012 ENER 155 666 1690

• 2316 8/31/2012 ENER 164 707 1710 .* 2300 9/5/2012 ENER 165 711 1690

• 2311 9/21/2012 ENER 158 681 1690

• 2327 9/25/2012 ENER 158 677 1680

• 2331 10/11/2012 ENER 198 54.0 6.20 283 433 < 5.00 161 686 1670

• 2331 1.03 10/17/2012 ENER 167 *595 1700

• 2375 IRR 34F . 4/19/2005 ENER 247 1020 1520

• 2120 6/1/2005 ENER 129 661 1520

• 2152 10/24/2005 ENER 144 683 1610 *2239 8/30/2010 ENER 158 716 1610

• 2350 9/8/2010 ENER 154 709 1660

• 2279 9/15/2010 ENER 162 731 1700 *2342 9/22/2010 ENER 170 735 1700

• 2332 10/1/2010 ENER 174 756 1760 *2404 10/6/2010 ENER 171 754 1660 *2450 10/11/2010 HMC 2486 10/13/2010 ENER 170 754 1760 10/27/2010 ENER 173 751 1760

• 2456

• Signifies Specific Conductivity from HMC A-4 i -

Table A.1-2 Water Quality of the South Irrigation Minor Constituents Sample Point pH Unat Mo Se N03 Ra226 Ra228 v Th230 Name Date Lab (std. units) (mg/I) (mg/I) (mg/I) (mg/I) (pCi/I) (pCi/I) (mg/I) (pCi/I) IRR 33/34 5/3/2000 ENER 0.128 0.0880 7/26/2000 ENER 0.187 0.0630 712812000 ENER 0.233 0.0760 8/6/2000 ENER 0.259 < 0.0300 0.116 8/15/2000 ENER 0.264 < 0.0300 0.117 8/18/2000 ENER 0.278 < 0.0300 0.119 8/19/2000 ENER 0.271 < 0.0300 0.116 8/24/2000 ENER 0.269 < 0.0300 0.106 8127120.00 ENER 0.262 < 0.0300 0.111 8/29/2000 ENER 0.301 < 0.0300 0.106 9/2/2000 ENER 0.275 < 0.0300 0.108 9/6/2000 ENER 0.318 0.106 '/ 9/9/2000 HMC 0.275 < 0.0300 0.139 4/20/2001 ENER 0.282 < 0.0300 0.107 5/6/2001 ENER 0.304 0.0600 0.114 5/10/2001 ENER 0.252 < 0.0300 0.0910 5/19/2001 ENER 0.276 < 0.0300 0.0990 5/24/2001 ENER 0.242 < 0.0300 0.107 6/3/2001 ENER 0.266 < 0.0300 0.102 6/10/2001 ENER 0.273 < 0.0300 0.0990 6/28/2001 ENER 0.270 < 0.0300 0.110 7/5/2001 ENER 0.221 < 0.0300 0.0970 7/24/2001 ENER 0.210 < 0.0300 0.0940 8/29/2001 ENER Q.280 0.410 0.102 9/1/2001 ENER 0.272 < 0.0300 0.102. 9/1/2001 ENER 0.212 < 0.0300 0.0960 9/17/2001 ENER 0.292 < 0.0300 0.131 4/15/2002 ENER 0.206 < 0.0300 0.0930 4/16/2002 ENER 0.251 < 0.0300 0.101 A-5 -------------------

---

Table A.1-2 Water Quality of the South Irrigation (cont'd.)

Minor Constituents Sample Point pH Unat Mo Se N03 Ra226 Ra228 v Th230 Name Date Lab (std. units) (mg/I) (mg/I) (mg/I) (mg/I) (pCi/I) (pCi/I) (mg/I) (pCi/I) IRR 33/34 5/8/2002 ENER 0.252 0.107 5/8/2002 ENER # 0.255 # 0.101 5/14/2002 ENER 0.245 .< 0.0300 0.0910 7/3/2002 ENER 0.226 0.0500 0.0960 7/31/2002 ENER 0.230 < 0.0500 0.103 10/2/2002 ENER 0.208 0.0960 5/14/2003 ENER 0.0339 < 0.0300 0.0480 2.60 9/18/2003 ENER 0.221 0.0790 51412004 ENER 0.284 < 0.0300 0.112 512712004 ENER 0.249 < 0.0300 0.0830 8/18/2004 ENER 0.268 0.0800 2.65 10/6/2004 ENER 0.232 < 0.0300 0.0750 412012005 ENER 0.247 < 0.0300 0.0550 2.60 5/25/2005 ENER 0.234 < 0.0300 0.0590 2.80 8/8/2005 ENER 0.270 0.0620 2.80 9/26/2005 ENER 0.298 < 0.0300 0.0720 2.50 10/11/2005 ENER 0.290 < 0.0300 0.0670 3.10 4/10/2006 ENER 0.243 < 0.0300 0.0540 2.80 6/26/2006 ENER 0.369 0.0700 0.0950 5.50 8/14/2006 ENER 0.273 0.0720 2.80 10/10/2006 ENER 0.285 < 0.0300 0.0670" 2.30 4/12/2007 ENER 0.275 <; 0.0300 0.0610 2.90 4/30/2007 ENER 0.265 < 0.0300 0.0650 2.80 6/4/2007 ENER 0.232 < 0.0300 0.0630 3.00 8/21/2007 ENER 0.301 0.0510 2.90 10/22/2007 ENER 0.312 < 0.0300 0.0590 2.40 417/2008 ENER 0.254 < 0.0300 0.0480 2.99 4/21/2008 ENER 0.0521 < 0.0300 0.0730 3.75 6/2/2008 ENER 0.262 < 0.0300 0.0420 2.87 # Signifies Quality Control Sample A-6 Table A.1-2 Water Quality of the South Irrigation (cont'd.)

Minor Constituents Sample Point pH Unat Mo Se N03 Ra226 Ra228 v Th230 Name Date Lab (std. units) (mg/I) (mg/I) (mg/I) (mg/I) (pCi/I) (pCi/I) (mg/I) (pCi/I) IRR 33/34 9/24/2008 ENER 0.213 < 0.0300 0.0490 2.79 5/6/2009 ENER 0.262 < 0.0300 0.0480 2.31 6/16/2009 ENER 0.213 < 0.0300 0.0470 2.93 8/22/2012 ENER 0.115 < 0.0300 0.0360 3.00 8/31/2012 ENER 0.119 < 0.0300 0.0410 3.00 9/5/2012 ENER 0.118 < 0.0300 0.0380 3.20 9/21/2012 ENER 0.109 < 0.0300 0.0500 3.00 9/25/2012 ENER 0.111 < 0.0300 0.0370 3.20 10/11/2012 ENER 7.31 0.115 < 0.0300 0.0370 3.10 0.380 1.40 < 0.0100 0.0300 10/17/2012 ENER 0.122 < 0.0300 0.0450 3.20 IRR 34F 4/19/2005 ENER 0.248 < 0.0300 0.0560 2.60 6/1/2005 ENER 0.243 < 0.0300 0.0640 2.70 10/24/2005 ENER 0.351 < 0.0300 0.0800 2.50 8/30/2010 ENER 0.129 < 0.0300 0.0440 3.10 9/8/2010 ENER 0.129 < 0.0300 0.0450 3.00 9/15/2010 ENER 0.118 < 0.0300 0.0480 3.50 9/22/2010 ENER 0.119 < 0.0300 0.0440 3.40 10/1/2010 ENER 0.143 < 0.0300 0.0440 3.20 10/6/2010 ENER 0.159 < 0.0300 0.0480 2.90 10/13/2010 ENER 0.156 < 0.0300 0.0470 3.20 10/27/2010 ENER 0.144 < 0.0300 0.0450 A-7 -------------------

---

* -----TABLE A.1-3 WATER QUALITY FOR THE SOUTH IRRIGATION SUPPLY WELLS Major Constituents Sample Point Ca Mg K Na HC03 C03 Cl 804 TDS Cond(calc.)

lon_B Name Date Lab (mg/I) (mg/I) (mg/I) (mg/I) (mg/I) (mg/I) (mg/I) (mg/I) (mg/I) (micromhos/ (ratio) 0482 11/19/1980 HMC 240 1260 10/14/1981 HMC 285 606 170 1230 2690 3/1/1982 HMC 430 588 199 1300 2640 3/22/1982 EID 251 65.1 4.29 382 563 193 983 2265 0.980 3/22/1982 HMC 313 55.0 395 571 < 10.00 184 1056 2200 2102 1/20/1983 HMC 330 357 550 60.0 956 9/6/1983 HMC 2.80 4.00 3.90 317 456 0 163 834 1966 2292 1.04 10/27/1983 HMC -'---149 907 2020 11/10/1994 ENER 224 62.0 6.10 ' 275 560 < 0.100 191 725 1851

• 2417 0.957 4/11/1996 ENER 222 62.5 6.00 284 572 < 0.100 197 716 1906 *2699 0.963 2/6/1997 HMC 712512002 ENER 671 1860 9/4/2003 ENER 226 65.7 7.10 274 539 < 1.000 204 751 1850

• 2465 0.951 12/12/2003 ENER 208 671 1810

• 2556 5/25/2005 ENER 193 681 1750

• 2415 9/21/2005 ENER 219 65.4 6.50 278 445 < 1.000 184 664 1760

• 1266 1.08 10/11/2006 ENER 182 661 1690

• 2675 61412007 ENER 170 617 1600

• 2298 6/23/2008 ENER 156 684 1620

• 2300 10/1/2008 ENER 194 792 1930

• 2560 6/23/2009 ENER 193 717 1720

• 2443 5/26/2010 ENER 183 638 1740

• 2377 8/30/2010 ENER 187 664 1680

• 2250 11/3/2011 ENER 183 658 1700 *2294 9/24/2012 ENER 196 720 1820

• 2508 7/9/2013 ENER 260 670 1800

• 2425 5/14/2014 ENER 215 61.4 6.20 273 515 < 5.00 201 707 1770

• 2971 0.959 0483 9/19/1979 EID 623 262 211 12/10/1979 EID 481 277 2070

• Signifies Specific Conductivity from HMC A-8 TABLE A.1-3 WATER QUALITY FOR THE SOUTH IRRIGATION SUPPLY WELLS (cont'd.)

Major Constituents Sample Point Ca Mg K Na HC03 C03 Cl 804 TDS Cond(calc.)

lon_B Name Date Lab (mgll) (mgll) (mgll) (mgll) (mg/I) (mg/I) (mg/I) (mg/I) (mg/I) (micromhos/ (ratio) 0483 3/19/1980 EID ---------543 608 ---257 1930 8/7/1980 EID ---------545 632 ---263 2100 7/13/1981 HMC --------550 --------1870. 3800 9/9/1981 HMC ---------490 616 ------1640 3300 10/14/1981 HMC ---------360 618 ---210 1450 2950 2/24/1982 HMC 252 74.0 --425 244 < 10.00 184 1322 2510 3/1/1982 HMC ---------430 588 ---199 1300 2640 3/22/1982 HMC 342 69.0 *4.68 425 578 0

• 204 1129

• 2360 2444

• 0.970 12/6/1982 HMC --------------163 905 2080 9/6/1983 HMC --------------------------2252 9/6/1983 HMC ---------------------------2302 9/6/1983 HMC -----------------------2348 9/6/1983 HMC 171 45.0 3.51 329 392 0 156 777 1820 2306 0.960 7/24/1996 ENER 217 61.5 .5.40 308 565 < 0.100 198 711 1891

• 2526 0.992 2/6/1997 HMC 2/7/1997 ENER 8/9/2005 ENER ------------------191 661 1790

• 2481 9/;20/2005 ENER 224 65.6 5.80 264 523 < 1.000 191 648 1810

• 963 1.03 10/11/2006 ENER . ------------------177 632 1600 *2494 6/4/2007 ENER -----------------168 624 1650

• 2356 6/2/2008 ENER ---------------177 791 1730 *2477 10/1/2008 ENER ------------------194 815 1950

• 2620 7/20/2009 ENER -----------------186 733 1830 *2500 10/6/2009 ENER -----------------209 848 1980 *2683 6/15/2010 ENER ------------------187 656 1730 *2454 8/30/2010 ENER ---------------192 671 1720 *2450 1117/2011 ENER ----------------193 699 1800

• 2499 9/24/2012 ENER ------------------202 772 1890

• 2595 11/14/2013 ENER -----------------383 1280 3030 *Signifies Specific Conductivity*from HMC A-9 -------------------

---

TABLE A.1-3 WATER QUALITY FOR THE SOUTH IRRIGATION SUPPLY WELLS (cont'd.)

Major Constituents Sample Point Ca Mg K Na HC03 C03 Cl 504 TDS Cond(calc.)

lon_B Name Date Lab (mgll) (mgll) (mgll) (mgll) (mgll) (mgll) (mgll) (mgll) (mgll) (micromhosl (ratio) 0483 6/11/2014 ENER 209 775 1840

• 2546 9/10/2014 ENER 204 813 1890

• 2847 ' 5/12/2016 ENER 226 63.6 5.70 315 532 < 5.00 195 733 1850 2509 1.02 0490 12/30/1981 HMC 353 52.0 300 368 < 0.0100 170 1240 2740 12/30/1981 HMC 355 47.0 300 360 < 0.0100 213 1208 2/5/1982 HMC 411 445 571 < 0.0100 192 1307 2650 2/5/1982 HMC 393 455 561 < 0.0100 199 1316 2620 2/5/1982 HMC 395 455 571 < 0.0100 184 1307 2540 3/22/1982 HMC 334 67.0 390 555 < 10.00 184 1203 2520 2544 5/27/1982 HMC 177 1092 2380 5/27/1982 HMC 2843 5/27/1982 HMC 2913 5/27/1982 HMC 2913 12/30/1982 HMC 2649 12/30/1982 HMC 2610 12/30/1982 HMC 149 917 1930 2504 2111/1983 HMC 2511 2/11/1983 HMC 2511 2/11/1983 HMC 227 57.0 5.00 350 525 0 105 900 2060 2511 1.04 4/27/1983 HMC 2456 4/27/1983 HMC 2450 4/27/1983 HMC 213 937 2020 2450 6/27/1983 HMC 2417 6/27/1983 HMC 2357 6/27/1983 HMC 2351 6/27/1983 EID 225

• 5.00

• 22.0

• 342 340 *O 173

• 855 *1990 2346 1.07 9/2/1983 HMC 2252 9/2/1983 HMC 2369 9/2/1983 HMC 156 830 1970 2372

• Signifies Specific Conductivity from HMC A-10 TABLE A.1-3 WATER QUALITY FOR THE SOUTH IRRIGATION SUPPLY WELLS (cont'd.)

Major Constituents Sample Point Ca Mg K Na HC03 C03 Cl 504 TDS Cond{calc.)

lon_B Name Date Lab (mg/I) (mg/I) (mg/I) (mg/I) (mg/I) (mg/I) (mg/I) (mg/I) (mg/I) (micromhos/ (ratio) 0490 10/6/1983 HMC -------------------------1405 10/6/1983 HMC --------------------------1325 10/6/1983 HMC ------------------163 856 1990 1357 1/6/1984 HMC ----------------------2582 1/6/1984 HMC -----------------------2612 1/6/1984 HMC 337 31.0 5.00 350 537 0 156 855 1870 2628 1.12 4/10/1984 HMC --------------------------2601 4/10/1984 HMC -----------------------2601 4/10/1984 HMC -----------------177 873 1900 2601 6/14/1984 HMC ---------------------------2523 6/14/1984 HMC -------------------------2549 6/14/1984 HMC ------------------199 824 1760 2549 10/23/1984 HMC -------------------------2542 10/23/1984 HMC --------------------------2542 10/23/1984 HMC ------------------170 758 1920 2511 1/30/1985 HMC -----------------------2664 1/30/1985 HMC ------------------------2538 1/30/1985 HMC 312 14.0 5.00 340 562 . 0.0010 170 785 1490 2469 1.04 4/2/1985 HMC ------------------------2453 4/2/1985 HMC -----------------------2480 4/2/1985 HMC ------------------170 773 1830 2450 7/8/1985 HMC --------------------------2516 7/8/1985 HMC -----------------------' ---2516 7/8/1985 HMC -------------178 736 1860 2516 7/8/1985 HMC --------------------------1663 7/8/1985 HMC --------------------------1703 10/14/1985 HMC --------------------------2504 10/14/1985 HMC -----------------------2504 10/14/1985 HMC ------------------156 773 1600 2504 A-11 -------------------

--* -----------------TABLE A.1-3 WATER QUALITY FOR THE SOUTH IRRIGATION SUPPLY WELLS (cont'd.)

Major Constituents Sample Point Ca Mg K Na HC03 C03 Cl 504 TDS Cond(calc.)

lon_B Name Date Lab (mg/I) (mg/I) (mg/I) (mg/I) (mg/I) (mg/I) (mg/I) (mg/I) (mg/I) (micromhos/ (ratio) 0490 1/14/1986 HMC 2443 1/14/1986 HMC 2443 1/14/1986 HMC 2443 1/14/1986 HMC 300 22.0 5.00 305 580 < 0.0010 163 756 1850 2443 1.01 4/9/1986 HMC 2440 4/9/1986 HMC 170 864 1670 2440 7/14/1986 HMC 2456 7/14/1986 HMC 2426 7/14/1986 HMC 177 747 1760 2426 10/21/1986 HMC 1475 10/21/1986 HMC 1479 10/21/1986 HMC 177 757 1830 1457 10/21/1986 HMC 306 35.0 4.00 183 349 < 10.00 163 710 1790 1.03 1/28/1987 HMC 2538 1/28/1987 HMC 2511 1/28/1987 HMC 306 13.0 6.00 303 601 < 0.0010 170 789 1670 2511 0.950 4/14/1987 HMC 2483 4/14/1987 HMC 2483 4/14/1987 HMC 163 749 1690 2483 7/15/1987 HMC 2520 7/15/1987 HMC 191 771 1400 2518 10/20/1987 HMC 2516 10/20/1987 HMC 2516 10/20/1987 HMC 163 815 1870 2516 11/19/1987 HMC 2511 11/19/1987 HMC 2511 11/19/1987 HMC 2511 11/19/1987 EID 224 51.2 4.83 319 550 166 675 1884 1.06 11/19/1987 HMC 298 15.0 5.00 312 612 < 10.00 149 738 1890 2542 1.000 A-12 TABLE A.1-3 WATER QUALITY FOR THE SOUTH IRRIGATION SUPPLY WELLS (cont'd.)

Major Constituents Sample Point Ca Mg K Na HC03 C03 Cl 504 TDS Cond(calc.)

lon_B Name Date Lab (mg/I) (mg/I) (mg/I) (mg/I) (mg/I) (mg/I) (mg/I) (mg/I) (mg/I) (micromhos/ (ratio) 0490 2/9/1988 HMC 2480 2/9/1988 HMC 2450 2/9/1988 HMC 313 19.0 5.00 320 604 < 10.00 170 776 1870 2480 1.000 8/17/1988 HMC 191 749 1840 2811 10/12/1988 HMC 325 22.0 5.00 330 639 184 754 1720 2444 1.04 1/23/1989 HMC 2511 1/23/1989 HMC 278 33.0 5.00 312 492 < 10.00 184 813 1730 2511 0.990 6/15/1989 HMC 2556 6/15/1989 HMC 184 790 1630 2402 8/31/1989 HMC 2585 8/31/1989 HMC 204 20.0 5.00 342 360 < 10.00 170 1036 1590 2585 0.823 4/4/1990 HMC 758 1890 2587 10/23/1990 HMC 2614 10/23/1990 HMC 334 17.0 8.00 307 573 177 757 1900 2595. 4/30/1991 HMC 2555 4/30/1991 HMC 768 1990 2574 10/10/1991 HMC 2572 10/10/1991 HMC 330 4.00

• 3.80

• 299

• 530 *< 1.000 184 782

• 1880 . 2554 0.990 4/30/1992 HMC 2523 4/30/1992 HMC 811 1920 2572 10/22/1992 HMC 264 19.0 5.00 310 521 < 0.100 170 768 1890 2551 0.967 10/22/1992 HMC 2460 3/8/1993 HMC 252 16.0 5.00 318 337 < 0.100 191 853 1920 2503 0.971 1017/1993 ENER 731 1896 *2473 3/17/1994 ENER 230 53.6 3.90 281 543 < 0.100 194 689 1734 *2430 0.982 9/29/1994 ENER 690 1788 *2439 3/28/1995 ENER 232 67.0 5.00 278 560 < 0.100 193 677 1871

• 2582 1.02 10/19/1995 ENER 713 1881

• 2585 3/13/1996 ENER 256 69.0 5.20 274 583 < 0.100 208 870 1824

• 2585 0.909 \

• Signifies Specific Conductivity from HMC A-13 -------------------

---

TABLE A.1-3 WATER QUALITY FOR THE SOUTH IRRIGATION SUPPLY WELLS (cont'd.)

Major Constituents Sample Point Ca Mg K Na HC03 C03 Cl 504 TDS Cond(calc.)

lon_B Name Date Lab (mg/I) (mg/I) (mg/I) (mg/I) (mg/I) (mg/I) (mg/I) (mg/I) (mg/I) (micromhos/ (ratio) 0490 10/14/1996 ENER 734 1930

• 2715 2/7/1997 HMC 2/20/1997 HMC 2/20/1997 HMC 2/20/1997 HMC 2/20/1997 HMC 2/20/1997 HMC 2/20/1997 HMC 2/20/1997 HMC 2/20/1997 HMC 2/20/1997 HMC 2/20/1997 HMC 2/20/1997 ENER 3/17/1997 ENER 233 63.9 5.00 263 565 0 196 719 1894 0.956 10/16/1997 ENER 678 1830 3/10/1998 ENER 242 67.0 5.60 282 562 < 1.000 211 753 1910 0.972 3/10/1998 ENER # 237 # 66.0 # 5.50 # 281 # 566 # < 1.000 # 209 # 744 # 1930 # 0.965 10/6/1998 ENER 689 1930 3/3/1999 ENER 235 64.7 6.30 275 571 < 1.000 217 733 1910 0.948 10/13/1999 ENER 719 1870 3/8/2000 ENER 197 57.7 5.90 244 557 < 1.000 193 629 1880 0.915 3/8/2000 ENER # 213 # 60.3 # 6.80 # 257 # 558 # < 1.000 # 207 # 645 # 1870 # 0.947 10/18/2000 ENER 544 1870 10/18/2000 ENER # 576 # 1870 6/5/2001 ENER 702 1890 6/11/2002 ENER 715 1880 6/4/2003 ENER 226 65.1 6.10 272 540 < 1.000 200 695 1870

• 2525 0.987 6/4/2003 ENER # 223 # 64.0 # 6.10 # 273 # 540 # < 1.000 # 200 # 691 # 1800 # 0.983 5/20/2004 ENER 232 64.9 6.50 280 537 < 1.000 202 699 1850 *2547 1.01 # Signifies Quality Control Sample

• Signifies Specific Conductivity from HMC A -14 TABLE A.1".'3 WATER QUALITY FOR THE SOUTH IRRIGATION SUPPLY WELLS (cont'd.)

Major Constituents Sample Point Ca Mg K Na HC03 C03 Cl 504 TDS Cond(calc.)

lon_B Name Date Lab (mg/I) (mg/I) (mg/I) (mg/I) (mg/I) (mg/I) (mg/I) (mg/I) (mg/I) (micromhos/ (ratio) 0490 512512005 ENER 190 55.6 5.70 275 488 < 1.000 194 707 1790 *2475 0.927 9/19/2005 ENER # 211 # 58.9 # 5.00 # 250 # 503 #< 1.000 # 191 #-720 # 1920 # 0.920 9/19/2005 238 70.6 6.00 257 497 < 1.000 191 716 1900

• 1074 1.02 5/18/2006 ENER 200 58.0 6.10 319 520 7.00 230 701 1730 *2569 0.965 6/19/2006 ENER 222 62.6 6.40 293 512 < 1.000 188 118 1820

• 2718 1.02 6/19/2006 ENER # 218 # 61.9 # 6.40 # 282 # 513 # < 1.000 # 193 # 711 # 1830 # 0.990 10/1112006 ENER 723 1790

• 2671 6/4/2007 ENER 217 60.8 5.80 293 495 < 1.000 182 712 1790

• 1871 1.02 10/1/2007 ENER 655 1810

• 2442 ---10/1/2007 ENER # 656 # 1790 6/2/2008 ENER 245 68.3 5.60 320 465 < 1.000 185 832 1970

• 2526 1.06 6/2/2008 ENER # 244 # 68.0 # 5.50 # 314 # 467 # < 1.000 # 183 # 837 -# 1840 # 1.04 10/1/2008 ENER 876 2030

• 2680 6/1/2009 ENER 203 59.9 6.60 291 502 < 1.000 185 663 1690

• 2117 1.02 9/14/2009 EPA6 # 236 # 63.7 # 5.47 # 325 # 189 # 869 # 1860 9/14/2009 ENER 806 1900 6/15/2010 ENER 97.5 26.5 4.30 508 554 < 5.00 174 641 1680

• 2506 -1.06 8/30/2010 ENER 180 661 1310

• 2500 10/27/2010 ENER 832 2020

• 2698 6/8/2011 ENER 215 57.8 5.50 269 515 < 5.00 192 719 1780

• 2415 0.942 10/11/2011 ENER 712 1770 *2456 6/13/2012 ENER 231 61.7 5.80 271 501 < 5.00 181 683 1820

• 2451 1.03 10/3/2012 ENER 846 1910 *2674 11/4/2013 ENER 1370 2750 *3580 11/22/2013 ENER 199 761 1870 6/11/2014 ENER 218 942 . 2020

• 2696 5/21/2015 ENER 242 66.2 5.70 339 382 < 5.00 204 960 2140 *2832 1.01 10/15/2015 ENER 897 . 1950 *2648 5/12/2016 ENER 227 61.1 6.30 318 462 < 5.00 190 808 1930 2567 1.01 # Signifies Quality Control Sample

• Signifies Specific Conductivity from HMC A-15 -*------------------

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TABLE A.1-3 WATER QUALITY FOR THE SOUTH IRRIGATION SUPPLY WELLS (cont'd.)

Major Constituents Sample Point Ca Mg K Na HC03 C03 Cl S04 TDS Cond(calc.)

lon_B Name Date Lab (mg/I) (mg/I) (mg/I) (mg/I) (mg/I) (mg/I) (mg/I) (mg/I) (mg/I) (micromhos/ (ratio) 0490 10/21/2016 ENER 200 53.0 6.70 309 519 < 5.00 176 672 1750 3944 1.01 3/9/2017 ENER 201 1100 2170 2850 0491 12/30/1981 HMC 369 46.0 340 411 < 0.0100 199 1290 12/30/1981 HMC 376 52.0 340 384 < 0.0100 206 1306 2910 12/30/1981 HMC 381 50.0 355 403 < 0.0100 206 1272 3/22/1982 HMC 289 64.0 395 504 < 10.00 184 1100 2250 2312 10/25/1983 HMC 2547 10/25/1983 HMC 2544 10/25/1983 HMC 184 1414 2770 2483 4/3/1990 HMC 760 1680 2879 11/10/1994 ENER 232 60.0 4.20 296 584 < 0.100 193 741 1900 *2476 0.969 3/25/1996 ENER 286 75.2 4.50 387 531 < 0.100 301 1021 2547

• 3178 0.973 12/4/1996 ENER 318 85.9 4.80 467 427 < 0.100 412 1250 2960

• 3907 0.971 2/20/1997 HMC 2/20/1997 HMC 2/20/1997 HMC 2/20/1997 HMC 2/20/1997 HMC 2/20/1997 HMC 3/25/1997 ENER 1300 3010 8/27/1997 ENER 335 84.6 5.20 439 460 < 0.100 412 1190 2810 0.976. 3/26/1998 ENER 772 2050 8/24/1998 ENER 226 59.8 4.40 287 569 < 1.000 191 659 1900 1.01 8/22/2001 ENER 1200 3270 712512002 ENER 937 2510 9/4/2003 ENER 212 730 1940

• 2582 12/12/2003 ENER 217 751 1900 *2644 8/23/2004 ENER 779 1880 *2536 5/25/2005 ENER 211 666 1860

• 2467

• Signifies Specific Conductivity from HMC A-16 TABLE A.1-3 WATER QUALITY FOR THE SOUTH IRRIGATION SUPPLY WELLS (cont'd.)

Major Constituents Sample Point Ca Mg K Na HC03 C03 Cl 804 TDS Cond(calc.)

lon_B Name Date Lab (mg/I) (mg/I) (mg/I) (mg/I) (mg/I) (mg/I) (mg/I) (mg/I) (mg/I) (micromhos/ (ratio) 0491 9/21/2005 ENER 231 65.1 4.70 264 537 < 1.000 182 618 1760

• 1253 1.06 5/18/2006 ENER 214 61.3 4.80 273 531 7.00 239 619 1670

• 2506 0.970 6/4/2007 ENER 160 562 1540

• 2230 6/4/2007 ENER # 168 # 573 # 1560 6/23/2008 ENER 475 1180 2860 *3608 10/1/2008 ENER 123 495 1380

• 1970 6/23/2009 ENER 115 464 1280

• 1886 1017/2009 ENER ---485 1300

• 1947 5/26/2010 ENER 131 445 1320

• 1895 8/30/2010 ENER 136 461 1310

• 1910 6/13/2011 ENER 156 513 1380

• 1995 11/3/2011 ENER 513 1400

• 1996 9/24/2012 ENER 156 526 1420

• 2037 7/9/2013 ENER 160 534 1470

• 2085 5/14/2014 ENER 603 1660 3550

• 4600 9/18/2014 ENER 622 1750 3940 9/18/2014 ENER # 632 # 1780 # 3950 *# 4911 0493 9/5/1984 HMC 26.0 1.000 -2.00 363 281 43.0 530 1100 1766 1.02 1/16/1985 HMC 43.0 528 1110 4/2/1985 HMC 1680 4/2/1985 HMC 1648 4/2/1985 HMC 11.0 2.00 1.000 372 282 < 0.0010 35.0 575 1120 1680 0.960 7/8/1985 HMC 1663 7/8/1985 HMC 1703 7/8/1985 HMG 35.0 566 1150 1703 10/11/1985 HMC 1680 10/11/1985 HMC 1680 10/11/1985 HMC 35.0 543 1050 1680 1/14/1986 HMC 1722 # Signifies Quality Control Sample

• Signifies Specific Conductivity from HMC A-17 ------*-------------

---

TABLE A.1-3 WATER QUALITY FOR THE SOUTH IRRIGATION SUPPLY WELLS (cont'd.)

Major Constituents Sample Point Ca Mg K Na HC03 C03 Cl 504 TDS Cond(calc.)

lon_B Name Date Lab (mg/I) (mg/I) (mg/I) (mg/I) (mg/I) (mg/I) (mg/I) (mg/I) (mg/I) (micromhos/ (ratio) 0493 1/14/1986 HMC 1722 1/14/1986 HMC 17.0 1/14/1986 HMC 43.0 571 1100 1722 4/9/1986 HMC 1698 4/9/1986 HMC 1693 4/9/1986 HMC 57.0 765 1000 1680 7/14/1986 HMC 21.0 3.00 2.00 372 278 < 0.0010 57.0 574 950 2340 0.970 10/20/1986 HMC 1357 10/20/1986 HMC 1232 10/20/1986 HMC 170 577 1090 1219 10/20/1986 HMC 43.0 594 1040 1/28/1987 HMC 1722 1/28/1987 HMC 1722 1/28/1987 HMC 43.0 587 1160 1764 4/14/1987 HMC 1788 4/14/1987 HMC 1722 4/14/1987 HMC 35.0 527 1010 1724 7/16/1987 HMC 1628 7/16/1987 HMC 1635 7/16/1987 HMC 1635 7/16/1987 HMC 24.0 1.000 1.000 348 267 < 10.00 43.0 543 1000 1635 0.950 10/20/1987 HMC 1724 10/20/1987 HMC

• 1577 10/20/1987 HMC 21.0 622 1060 1648 11/19/1987 HMC 1693 11/19/1987 EID 8.00 0.900 1.57 399 263 92.2 549 1108

• 1722 0.970 11/19/1987 HMC 1708 11/19/1987 HMC 22.0 1.000 1.000 363 284 < 10.00 35.0 535 810 1708 0.990 2/9/1988 HMC 1688

• Signifies Specific Conductivity from HMC A-18 TABLE A.1-3 WATER QUALITY FOR THE SOUTH IRRIGATION SUPPLY WELLS (cont'd.)

Major Constituents Sample Point Ca Mg K Na HC03 C03 Cl 504 TDS Cond(calc.)

lon_B Name Date Lab (mg/I) (mg/I) (mg/I) (mg/I) (mg/I) (mg/I) (mg/I) (mg/I) (mg/I) (micromhos/ (ratio) 0493 2/9/1988 HMC 1676 2/9/1988 HMC 35.0 567 1000 1655 4/27/1988 HMC 1680 4/27/1988 HMC 43.0 588 820 1680 7/20/1988 HMC 1558 7/20/1988 HMC 21.0 1.000 2.00 393 278 50.0 591 780 1558 1.000 10/27/1988 HMC 43.0 623 1589 1/19/1989 HMC 1722 1/19/1989 HMC 43.0 625 1110 1722 6/15/1989 HMC 1680 6/15/1989 HMC 57.0 580 1150 1680 8/31/1989 HMC 1712 8/31/1989 HMC 22.0 3.00 2.00 427 264 17.0 50.0 676 1080 1680 0.980 10/27/1989 HMC 1080 4/4/1990 HMC 598 1180 1725 10/22/1990 HMC 22.0 1.000 6.00 387 268 57.0 550 1110 1734 4/30/1991 HMC 1766 4/30/1991 HMC 559 1170 1784 10/10/1991 HMC 22.0 3.00 2.00 400 262 < 0.100 50.0 650 1210 0.977 10/10/1991 BARR 6.90 1.30 1.000 376 244 < 1.000 48.0 487 1100

• 1792 1.08 4/13/1992 HMC 732 1240 1809 4/30/1992 HMC 675 1270 1826 11/2/1992 HMC 1827 11/2/1992 HMC 1758 11/2/1992 HMC 22.0 3.00 2.00 400 270 < 0.100 57.0 602 1220 1758 1.01 3/8/1993 HMC 28.0 2.00 2.00 400 275 < 0.100 57.0 656 1230 1805 0.961 12/10/1993 HMC 1890 3/15/1994 ENER 7.20 1.20 0.500 403 254 < 0.100 66.1 597 1177

• 1892 0.975 9/29/1994 HMC 672 1350 1885

• Signifies Specific Conductivity from HMC A-19 -------------------

---

TABLE A.1-3 WATER QUALITY FOR THE SOUTH IRRIGATION SUPPLY WELLS (cont'd.)

Major Constituents Sample Point Ca Mg K Na HC03 C03 Cl 504 TDS Cond(calc.)

lon_B Name Date Lab (mgll) (mgll) (mgll) (mgll) (mgll) (mgll) (mgll) (mgll) (mgll) (micromhosl (ratio) 0493 9/29/1994 ENER 622 1275

• 1885 11/14/1994 ENER 7.00 1.30 1.40 407 270 < 0.100 62.6 613 1238 *1680 0.960 11/21/1994 ENER 7.90 1.41 1.50 426 276 < 0.100 70.9 664 1294

• 1976 0.938 3/28/1995 ENER 7.60 1.60 1.40 419 257 4.30 66.0 666 1258

• 1986 0.935 10/16/1995 ENER 610 1264

• 2003 3/13/1996 ENER 8.30 1.70 1.50 411 257 4.40 73.2 655 1257

• 2068 0.921 10/14/1996 ENER 647 1300

• 2185 2/20/1997 HMC 2/20/1997 HMC 2/20/1997 HMC 2/20/1997 HMC 2/20/1997 HMC 2/20/1997 HMC 2/20/1997 HMC 2/20/1997 HMC 2/20/1997 HMC 2/20/1997 HMC 2/20/1997 HMC 2/20/1997 HMC 2/20/1997 HMC 2/20/1997 HMC 2/20/1997 HMC 2/20/1997 ENER 3/17/1997 ENER 7.70 1.50 1.60 396 263 0 69.0 630 1299 0.917 4/15/1997 ENER 7.80 1.50 1.50 427 270 0 63.2 619 1320 1.00 10/16/1997 ENER 604 1260 3/10/1998 ENER 8.90 1.70 1.80 443 268 < 1.000 84.0 695 1390 0.936 10/6/1998 ENER 674 1450 3/3/1999 ENER 10.4 2.10 2.60 473 274 4.20 99.5 752 1510 0.924

• Signifies Specific Conductivity from HMC A-20 TABLE A.1-3 WATER QUALITY FOR THE SOUTH IRRIGATION SUPPLY WELLS (cont'd.)

Major Constituents Sample Point Ca Mg K Na HC03 C03 Cl 804 TDS Cond(calc.)

lon_B Name Date Lab (mg/I) ,-(mg/I) (mg/I) (mg/I) (mg/I) (mg/I) (mg/I) (mg/I) (mg/I) (micromhos/ (ratio) 0493 10/13/1999 ENER 710 1450 10/13/1999 ENER # 696 # 1440 3/8/2000 ENER 8.30 1.70 3.20 432 275 < 1.000 88.3 638 1370 0.956 10/18/2000 ENER 499 1290 3/13/2001 ENER 722 1320 6/5/2001 ENER 639 1330 3/27/2002 ENER 719 1420 6/11/2002 ENER 668 1350 3/20/2003 ENER 737 1530 3/20/2003 ENER # 739 # 1520 6/4/2003 ENER 11.3 2.40 2.00 496 294 3.50 99.3 698 1510

• 2278 1.01 3/11/2004 ENER 733 1570 *2224 3/11/2004 ENER # 723 # 1560 5/20/2004 ENER 12.1 3.80 2.30 470 314 < 1.000 117 707 1560

• 2350 0.923 2/8/2005 ENER 743 1570 *2420 5/25/2005 ENER 9.80 1.70 1.60 557 320 < 1.000 109 688 1500 *2343 1.10 5/25/2005 ENER # 9.80 # 1.70 # 1.70 # 558 # 320 # < 1.000 # 112 # 691 # 1520 # 1.09 9/19/2005 ENER 9.80 1.90 1.60 458 311 6.00 111 648 1560

• 1397 0.940 2/13/2006 ENER 693 1620

• 2460. 2/13/2006 ENER # 681 # 1640 6/19/2006 ENER 12.0 2.20 2.20 500 364 < 1.000 122 692 1570

• 2589 0.947 2/5/2007 ENER 783 1600

• 2380 5/10/2007 ENER 11.5 2.10 1.90 558 357 < 1.000 123 658 1580 *2372 1.09 2/5/2008 ENER 732 1510 *2537 6/23/2008 ENER 12.8 2.60 1.80 552 365 1.000 113 669 1560 *2359 1.08 10/1/2008 ENER 684 1500 *2270 7/20/2009 ENER 13.0 2.60 1.70 583 367 < 1.000 126 673 1590 *2400 1.11 9/14/2009 ENER 12.2 2.50 1.70 561 371 7.00 133 734 1520 *2443 0.997 9/14/2009 EPA6 # 14.0 # 2.89 # 2.03 # 548 # 129 # 751 # 1460 # Signifies Quality Control Sample

• Signifies Specific Conductivity from HMC A-21 --------------------

---

TABLE A.1-3 WATER QUALITY FOR THE SOUTH IRRIGATION SUPPLY WELLS (cont'd.)

Major Constituents Sample Point Ca Mg K Na HC03 C03 Cl S04 TDS Cond(calc.)

lon_B Name Date Lab (mg/I) (mg/I) (mg/I) (mg/I) (mg/I) (mg/I) (mg/I) (mg/I) (mg/I) (micromhos/ (ratio) 0493 2/8/2010 ENER 774 1620

• 2662 6/15/2010 ENER 14.9 3.00 2.00 657 440 < 5.00 142 751 1720 *2645 1.10 10/27/2010 ENER 131 702 1630 *2476 2/7/2011 ENER 693 1550 *2466 2/7/2011.

ENER # 688 # 1550 6/8/2011 ENER 15.1 2.90 2.00 616 404 6.00 137 699 1630.

• 2510 1.10 3/6/2012 ENER 640 1720

• 2479 6/13/2012 ENER 16.6 3.10 1.90 590 407 < 5.00 132 707 1670

• 2537 1.06 9/20/2012 ENER 138 701 1630

• 1919 2/8/2013 HMC 697 1650 2503 7/8/2013 ENERr 14.8 3.00 2.10 575 416 < 5.00 141 689 1610

• 2492 1.03 2/12/2014 ENER 700 1660

• 2588 2/12/2014 ENER # 695 # 1670 6/16/2014 ENER 15.0 2.80 2.00 621 408 < 5.00 143 704 1620

• 2469 1.10 3/4/2015 ENER ---/' 676 1550

• 2384 . 3/4/2015 ENER # 679 # 1530

• 2384 5/21/2015 ENER 12.3 2.40 1.80 531 361 < 5.00 128 658 1540

• 2368 1.02 2/15/2016 ENER 677 1550 2393 7/11/2016 ENER 13.9 2.80 1.90 550 388 11.0 139 652 1600 2449 1.03 3/1/2017 ENER 688 1530 2393 0496 2/5/1997 ENER 228 57.9 6.20 297 451 0 174 841 1940 0.980 2/27/1997 HMC 2/27/1997 HMC 2/27/1997 HMC 2/27/1997 HMC 2/27/1997 HMC .. 2/27/1997 HMC 2/27/1997 HMC 3/4/1997 HMC # Signifies Quality Control Sample

• Signifies Specific Conductivity from HMC A-22 TABLE A.1-3 WATER QUALITY FOR THE SOUTH IRRIGATION SUPPLY WELLS (cont'd.)

Major Constituents Sample Point Ca Mg K Na HC03 C03 Cl 504 TDS Cond(calc.)

lon_B Name Date Lab (mg/I) (mg/I) (mg/I) (mg/I) (mg/I) (mg/I) (mg/I) (mg/I) . (mg/I) (micromhos/ (ratio) 0496 3/4/1997 HMC 3/4/1997 HMC 4/22/1997 ENER 225 56.0 6.00 308 455 0 174 827 1940 0.993 8/18/1997 ENER 838 1900 4/13/1998 ENER 219 56.0 6.00 305 571 < 1.000 184 816 1880 0.917 8/10/1998 ENER 764 1900 8/31/1999 ENER 736 1820 812212000 ENER 668 1870 8/22/2000 ENER # 666 # 1850 8/20/2001 ENER 640 1880 8/20/2001 ENER # 630 # 1880 8/12/2002 ENER 690 1780 8/12/2002 ENER # 698 # 1780 8/21/2003 ENER 203 736 1770

• 2343 8/17/2004 ENER 662 1590

• 2129 3/28/2005 ENER 139 565 1470

• 2122 9/26/2005 ENER 123 514 1410

• 2018 3/15/2006 ENER 133 534 1360

• 2152 3/26/2007 ENER 123 559 1310

• 1895 9/11/2007 ENER 134 569 1420

• 2015 3/31/2008 ENER 167 671 1510

• 2163 3/23/2009 ENER 173 634 1630 *2274 8/12/2009 ENER 182 666 1650

• 2410 10/6/2010 ENER 178 664 1690

• 2420 10/27/2010 ENER 179 664 1700 *2400 4/18/2011 ENER 181 675 1660 *2442 10/19/2011 ENER 176 663 1680

• 2400 5/7/2012 ENER / 170 652 1750 *2436 9/20/2012 ENER 170 650 1700

• 1853 # Signifies Quality Control Sample

• Signifies Specific Conductivity from HMC A-23 ---*----------------

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TABLE A.1-3 WATER QUALITY FOR THE SOUTH IRRIGATION SUPPLY WELLS (cont'd.)

Major Constituents Sample Point Ca Mg K Na HC03 C03 Cl 504 TDS Cond(calc.)

lon_B Name Date Lab (mg/I) (mg/I) (mg/I) (mg/I) (mg/I) (mg/I) (mg/I) (mg/I) (mg/I) (micromhos/ (ratio) 0496 3/6/2013 ENER 170 647 1670.

• 2434 11/14/2013 ENER 166 636 1700 4/1/2014 ENER 164 648 1690

• 2413 0497 2/27/1997 ENER 224 60.3 6.20 352 572 0 190 767 1910 1.03 3/4/1997 HMC 3/4/1997 HMC 3/6/1997 HMC 3/6/1997 HMC 3/6/1997 HMC 3/6/1997 HMC 3/6/1997 HMC 3/6/1997 HMC 3/12/1997 HMC 3/12/1997 HMC 3/12/1997 ENER 4/22/1997 ENER 218 55.3 6.20 334 583 0 185 747 1931 0.993 8/18/1997 ENER 760 1910 4/13/1998 ENER 221 58.0 6.00 333 508 < 1.000 188 779 1920 1.02 8/10/1998 ENER 752 1990 8/31/1999 ENER 748 1930 8/15/2000 ENER 699 1960 8/20/2001 ENER 680 2050 8/12/2002 ENER 747 2000 8/25/2003 ENER 215 851 2000

• 2648 8/17/2004 ENER 793 1920

• 2581 11/8/2004 ENER 176 713 1920

• 2607 2/2/2005 ENER 727 1910

• 2580 9/26/2005 ENER 170 676 1890

• 2583 1/10/2006 ENER 710 1840

• 2553

• Signifies Specific Conductivity from HMC A-24 TABLE A.1-3 WATER QUALITY FOR THE SOUTH IRRIGATION SUPPLY WELLS (cont'd.)

Major Constituents Sample Point Ca Mg K Na HC03 C03 Cl 504 TDS Cond(calc.)

lon_B Name Date Lab (mgll) (mgll) (mgll) (mg/I) (mg/I) (mg/I) (mg/I) (mgll) (mg/I) (micromhos/ (ratio) 0497 8/14/2006 ENER 184 671 1740

• 2.506 9/11/2007 ENER 181 721 1850 *2510 10/1/2008 HMC 73.0

• 186

• 721

• 1880 2083 7/20/2009 ENER 183 713 1810

• 2510 5/26/2010 ENER 185 729 1900 *2605 10/19/2011 ENER 172 702 1760

• 2422 10/9/2012 ENER 169 693 1830

• 2505 1117/2012 ENER 216 57.9 6.10 322 550 < 5.00 171 723 1830

• 2523 1.02 6/17/2013 ENER 171 673 1770 *2462 11/14/2013 ENER 175 664 1790 4/1/2014 ENER 187 801 1950

• 2689 6/11/2014 ENER 184 794 1920 *2590 7/10/2014 ENER 186 802 1820 *2597 11/13/2014 ENER 174 753 1860 *2574 12/23/2014 ENER 168 752 1850

• 2599 3/4/2016 ENER 291 78.3 7.40 374 476 < 5.00 213 1210 2390 3059 0.955 3/17/2017 ENER 270 72.6 6.60 354 483 < 5.00 191 1040 2240 2888 0.997 0498 3/12/1997 HMC 3/12/1997 ENER 1/19/2004 ENER 199 51.0 7.00 298 447 < 1.000 181 730 1830

• 2418 0.986 9/13/2004 ENER 206 745 1750 *2378 9/26/2005 ENER 153 623 1620

• 2286 8/14/2006 ENER 146 583 1460

• 2134 6/4/2007 ENER 163 602 1560

• 2292 6/23/2008 ENER 149 637 1500

• 2179 10/1/2008 ENER 157 613 1530

• 2192 .6/15/2009 ENER 175 646 1620

• 2318 5/26/2010 ENER 178 662 1740

• 2417 6/13/2011 ENER 178 666 1690

• 2320 *Signifies Specific Conductivity from HMC A-25 ----------... --------

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*------TABLE A.1-3 WATER QUALITY FOR THE SOUTH IRRIGATION SUPPLY WELLS (cont'd.)

Major Constituents Sample Point Ca Mg K Na HC03 C03 Cl 804 TDS Cond(calc.)

lon_B Name Date Lab (mg/I) (mg/I) (mg/I) (mg/I) (mg/I) (mg/I) (mg/I) (mg/I) (mg/I) (micromhos/ (ratio) 0498 71912012 ENER 166 639 1740 *2426 11/14/2013 ENER 161 632 1680 6/11/2014 ENER 84.0 332 1690 *2390 6/9/2015 ENER 167 646 1630

• 2785 71512016 ENER 151 36.6 5.60 260 539 < 5.00 120 505 1430 2026 0.961 0538 1/19/2004 ENER 188 53.0 6.60 323 409 < 1.000 161 823 1890

• 2473 0.984 9/13/2004 ENER 176 850 1750

• 2325 21712005 ENER 738 1660

• 2380 12/11/2006 ENER 763 1760

• 2405 4/30/2007 ENER 751 1740 *2353 3/31/2008 ENER 770 1680 *2244 6/15/2009 ENER 711 1710 512512010 ENER 726 1750 *2456 8/28/20fO ENER 178 705 1760

• 2440 4/18/2011 ENER 744 1740 *2424 5/9/2012 ENER 716 1830

• 2465 9/20/2012 ENER 179 01 721 1830

• 1972 3/18/2013 HMC 744 1750 2475 4/1/2014 ENER 734 1780

• 2456 7/18/2014 ENER 192 732 1770

• 2002 8/9/2016 ENER 188 727 1740 2453 0540 3/18/1997 HMC 1/20/2004 ENER 184 49.0 6.30 310 387 < 1.000 171 783 1820

• 2400 0.977 9/13/2004 ENER 193 808 1720 *2336 9/27/2005 ENER 159 729 1750 *2425 9/12/2007 ENER 165 862 1880

• 2580 10/1/2008 ENER 174 915 2020

• 2667 9/11/2009 ENER 175 812 1850

• 2500

• Signifies SJ)ecific Conductivity from HMC A -26 TABLE A.1-3 WATER QUALITY FOR THE SOUTH IRRIGATION SUPPLY WELLS (cont'd.)

Major Constituents Sample Point Ca Mg K Na HC03 C03 Cl S04 TDS Cond(calc.)

lon_B Name Date Lab (mg/I) (mg/I) (mg/I) (mg/I) (mg/I) (mg/I) (mg/I) (mg/I) (mg/I). (micromhos/ (ratio) 0540 3/1/2010 ENER 167 43.0 6.10 313 486 < 5.00 173 722 1670

• 2491 0.914. 5/25/2010 ENER 172 710 1770 *2484 8/28/2010 ENER 181 704 1780

• 2450 10/19/2011 ENER 183 735 1740 *2477 9/20/2012 ENER 188 755 1880

• 1973 5/3/2013 ENER 177 698 1830

• 3095 11/14/2013 ENER 179 695 1780 10/3/2014 ENER 192 740 1820

• 2514 5/14/2015 ENER 194 728 1790

• 2469 4/28/2016 ENER 92.0 28.3 5.00 142 298 < 5.00 78.0 267 814 1.03 8/4/2016 ENER 133 539 1400 1994 0541 2/9/2004 ENER 174 48.5 6.50 118 379 < 1.000 84.0 462 1140

• 1530 0.986 4/23/2004 HMC 1920 9/13/2004 ENER 129 614 1360

• 1775 9/26/2005 ENER 101 584 1410

• 1927 8/30/2006 ENER 92.0 598 1340

• 1860 8/22/2007 ENER 101 555 1400

• 1814 10/2/2008 ENER 95.0 554 1320

• 1802 7/21/2009 ENER 96.0 549 1390

• 1820 4/20/2010 ENER 117 655 1570

• 2085 6/15/2010 ENER 117 657 1590

• 2101 10/27/2010 ENER 103 592 1470

• 1970 9/20/2012 ENER 131 640 1500

• 1634 8/8/2013 ENER 156 628 1620

• 2201 7/21/2015 ENER 168 637 1570

• 2179 12/28/2016 ENER 150 635 1480 2028 0631 3/18/1997 HMC 3/18/1997 HMC

• Signifies Specific Conductivity from HMC A-27 -------------------

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TABLE A.1-3 WATER QUALITY FOR THE SOUTH IRRIGATION SUPPLY WELLS (cont'd.)

Major Constituents Sample Point Ca Mg K Na HC03 C03 Cl 504 TDS Cond(calc.)

lon_B Name Date Lab (mg/I) (mg/I) (mg/I) (mg/I) (mg/I) (mg/I) (mg/I) (mg/I) (mg/I) (micromhos/ (ratio) 0631 3/18/1997 HMC 3/18/1997 HMC 3/18/1997 H,MC 3/18/1997 HMC 3/18/1997 HMC 3/18/1997 HMC 3/30/1999 ENER 152 36.7 5.70 312 207 < 1.000 93.5 814 1650 1.06 3/31/1999 ENER 154 36.9 5.70 310 212 < 1.000 93.2 816 1640 1.05 10/28/1999 ENER 820 1570 9/6/2000 ENER 720 1520 5/4/2001 ENER 719 1590 9/17/2001 ENER 677 1540 5/8/2002 ENER 819 1560 10/2/2002 ENER 743 1550 5/27/2003 ENER 98.7 488 1550 9/18/2003 ENER 107 826 1570 *2077 5/13/2004 ENER 867 1650

• 2163 9/14/2004 ENER 847 1580

• 2122 3/28/2005 ENER 792 1580

• 2195 9/26/2005 ENER 105 788 1620

• 2202 3/15/2006 ENER 634 1510

• 2366 10/10/2006 ENER 128 797 1590

• 2370 5/1/2007 ENER 866 1730

• 2275 9/12/2007 ENER 133 854 1650

• 2262 3/31/2008 ENER 869 1650

• 2366 6/16/2009 ENER 848 1700

• 2416 7/21/2009 ENER 144 833 1720

• 2360 4/21/2010 ENER 838 1790 *2463 8/28/2010 ENER 162 1680 *2420

• Signifies Specific Conductivity from HMC A-28 TABLE A.1-3 WATER QUALITY FOR THE SOUTH IRRIGATION SUPPLY WELLS (cont'd.)

Major Constituents Sample Point Ca Mg K Na HC03 C03 Cl 504 TDS Cond(calc.)

lon_B Name Date Lab (mg/I) (mgll) (mgll) (mgll) (mgll) (mgll) (mgll) (mgll) (mg/I) (micromhosl (ratio) 0631 4/18/2011 ENER 817 1700 *2428 5/912012 ENER 779 1730

• 2415 912012012 ENER 166 792 1770

• 1878 11nt2012 ENER 172 40.7 6.30 343 324 < 5.00 163 778 1780

• 2414 1.03 3/6/2013 ENER 751 1710 *2404 4/1/2014 ENER 809 1780 *2462 12/27/2016 ENER 190 787 1800 2535 0632 3/18/1997 HMC 3/18/1997 HMC 3/18/1997 HMC 3/18/1997 HMC 3/18/1997 HMC 3/25/1999 ENER 156 36.1 6.00 320 201 < 1.000 114 823 1710 1.05 3/26/1999 ENER 156 35.9 6.00 316 199 < 1.000 113 824 1690 1.04 10/28/1999 ENER 874 1650 91612000 ENER 743 1550 9/17/2001 ENER 688 1580 101212002 ENER 746 1610 911812003 ENER 142 891 1710

• 2284 9/14/2004 ENER 157 36.0 6.70 322 220 < 1.000 137 887 1710

• 2268 0.962 2/3/2005 ENER 170 33.4 6.50 310 226 < 1.000 167 858 1750 *2334 0.946 5/1/2007 ENER 129 803 1680

• 2280 9/1212007 ENER 132 828 1610 *2260 3/31/2008 ENER 146 855 1580

• 2287 6/23/2009 ENER 147 824 1630

• 2323 7/21/2009 ENER 141 786 1690 *2290 412112010 ENER 142 797 1690

• 2328 8/2812010 ENER 145 782 1690

• 2310 4/1812011 ENER 147 798 1650

• 2285 *Signifies Specific Conductivity from HMC A-29 ----*---------------

---

TABLE A.1-3 WATER QUALITY FOR THE SOUTH IRRIGATION SUPPLY WELLS (cont'd.)

Major Constituents Sample Point Ca Mg K Na HC03 C03 Cl 804 TDS Cond(calc.)

lon_B Name Date Lab (mg/I) (mg/I) (mg/I) (mg/I) (mg/I) (mg/I) (mg/I) *(mg/I) (mg/I) (micromhos/ (ratio) 0632 5/9/2012 ENER ------------------141 749 1680

• 2296 9/20/2012 ENER ------------------140 747 1680

• 1806 3/6/2013 ENER ------------------147 755 1600

• 2290 4/1/2014 ENER -----------------151 748 1670

• 2314 0644 10/22/1996 ENER 150 35.9 5.70 281 179 < 0.100 97.0 840 1630

• 2281 0.985 4/15/1997 HMC 4/15/1997 HMC 4/15/1997 HMC 4/15/1997 HMC 4/15/1997 HMC 4/15/1997 HMC 4/15/1997 HMC 4/15/1997 HMC 4/15/1997 HMC 5/15/1997 ENER 179 39.0 6.20 305 174 0 123 934 1750 ---0.992 9/12/1997 ENER 186 41.1 6.40 315 172 < 0.100 130 984 1770 ---0.983 10/16/1997 ENER ------------------946 1780 5/14/1998 ENER 182 . 42.0 5.90 311 173 < 1.000 135 990 1820 ---0.961 10/20/1998 ENER --------------------987 1850 10/19/1999 ENER ---------------------961 1840 10/31/2000 ENER ---------------------954 1860 10/15/2001 ENER --------------------843 1900 10/16/2002 ENER -------------------879 1920 117/2004 ENER -----------------175 1000 1900

• 2544 . 612212004 ENER ------------------167 989 1970

• 2588 71612005 ENER ------------------170 941 1950

• 2506 8/30/2006 ENER ------------------171 891 1870

• 2570 9/12/2007 ENER ------------------170 873 1870

• 2601 10/1/2008 ENER ---------------174 826 1870

• 2551

• Signifies Specific Conductivity from HMC A-30 TABLE A.1-3 WATER QUALITY FOR THE SOUTH IRRIGATION SUPPLY WELLS (cont'd.)

Major Constituents Sample Point Ca Mg K Na HC03 C03 Cl S04 TDS Cond(calc.)

lon_B Name Date Lab (mg/I) (mg/I) (mg/I) (mg/I) . (mg/I) (mg/I) (mg/I) (mg/I) (mg/I) (micromhos/ (ratio) 0644 8/10/2009 ENER 180 784 1820

• 2650 5/25/2010 ENER 185 789 1820

• 2552 8/28/2010 ENER 177 738 1830

• 2510 7/11/2011 ENER 178 764 1780 *' *2488 9/20/2012 ENER 179 776 1830

• 1968 10/10/2014 ENER 172 700 1880

• 2569 8/1/2016 ENER 193 768 1800 2504 0647 1/10/1997 ENER 196 50.6 6.30 192 346 0 111 640 1470 1.01 3/4/1997 ENER 209 55.5 6.90 214 382 0 137 740 1700 0.959 4/15/1997 HMC 4/15/1997 HMC 4/15/1997 HMC 4/15/1997 HMC 4/15/1997 HMC 4/15/1997 HMC 4/15/1997 HMC 4/15/1997 HMC 4/15/1997 HMC 4/15/1997 HMC 4/17/1997 HMC 4/17/1997 HMC 4/17/1997 ENER 788 1710 7/9/1997 ENER 242 60.0 7.40 226 378 < 0.100 175 820 1790 0.958 1/21/1998 ENER 689 1480 7/21/1998 ENER 214 56.2 6.90 219 376 < 1.000 126 727 1820 1.00 12/17/1998 ENER 214 56.8 6.80 207 380 < 1.000 126 707 1700 1.000 7/21/1999 ENER 116 662 1510 3/7/2000 ENER 635 1430 9/6/2000 ENER 612 1470

• Signifies Specific Conductivity from HMC A-31 -------------------

---

TABLE A.1-3 WATER QUALITY FOR THE SOUTH IRRIGATION SUPPLY WELLS (cont'd.)

Major Constituents Sample Point Ca Mg K Na HC03 C03 Cl 504 TDS Cond(calc.)

lon_B Name Date Lab (mg/I) (mg/I) (mg/I) (mg/I) (mg/I) (mg/I) (mg/I) (mg/I) (mg/I) (micromhos/ (ratio) 0647 8/12/2002 ENER 642 1460 8/21/2003 ENER 104 645 1370

• 1803 4/23/2004 HMC 2010 8/19/2004 ENER 96.0 611 1330

• 1784 8/10/2005 ENER 92.0 541 1290

• 1771 10/4/2006 ENER 100.0 558 1380

• 1982 8/22/2007 ENER 83.0 562 1300

• 1759 10/2/2008 ENER 85.0 557 1230

• 1672 7/21/2009 ENER 98.0 566 1390

• 1810 11/6/2009 ENER 130 676 1510 *2076 6/15/2010 ENER 136 713 1650

• 2217 8/28/2010 ENER 128 665 1780

• 2160 10/30/2010 ENER 139 736 1670

• 2219 2/9/2011 ENER 137 738 1630

• 2224 5/11/2011 ENER 237 58.6 6.20 229 397 < 5.00 145 757 1640

• 2268 1.01 8/16/2011 ENER 145 774 1610 *2258 9/20/2012 ENER 140 728 .1700

• 1798 2/6/2013 HMC 215 55.4 5.50 210 414 < 5.00 143 733 1730 2280 0.936 8/8/2013 ENER 129 660 1670 8/27/2014 ENER 142 654 1550

• 2100 . 0648 1/10/1997 ENER 170 42.7 6.00 172 328 0 72.3 564 1270 1.02 3/4/1997 ENER 158 40.4 5.40 162 322 0 72.7 564 1290 0.964 4/17/1997 HMC 4/17/1997 HMC 4/17/1997 HMC 4/17/1997 HMC 4/17/1997 HMC 4/17/1997 HMC 4/17/1997 ENER 618 1300

• 1648 *Signifies Specific Conductivity from HMC *A-32 TABLE A.1-3 WATER QUALITY FOR THE SOUTH IRRIGATION SUPPLY WELLS (cont'd.)

Major Constituents Sample Point Ca Mg K Na HC03 C03 Cl 504 TDS Cond(calc.)

lon_B Name Date Lab (mg/I) (mg/I) (mg/I) (mg/I) (mg/I) (mg/I) (mg/I) (mg/I) (mg/I) (micromhos/ (ratio) 0648 4/17/1997 HMC 4/17/1997 HMC 4/22/1997 HMC 4/22/1997 HMC 4/22/1997 HMC 4/22/19_97 HMC 4/22/1997 HMC 4/22/1997 HMC 4/23/1997 HMC 7/9/1997 ENER 193 46.0 5.80 174 312 < 0.100 104 649 1390 0.980 11/24/1997 ENER 634 1360

• 1/21/1998 ENER 647 1360 7/21/1998 ENER 157 40.2 5.60 159 395 < 1.000 68.1 456 1280 1.02 12/17/1998 ENER 170 42.8 5.50 167 312 < 1.000 77.6 589 1310 0.990 7/21/1999 ENER 61.8 421 1030 10/28/1999 ENER 487 1110 1/24/2000 ENER 554 1250 9/6/2000 ENER 538 1270 5/4/2001 ENER 523 1290 5/4/2001 ENER # 520 # 1310 8/15/2001 ENER 570 1330 5/8/2002 ENER 587 1210 8/12/2002 ENER 526 1200 5/27/2003 ENER 59.4 516 1170 8/21/2003 ENER 62.5 526 1120

• 1541 4/23/2004 HMC 1600 5/13/2004 ENER 141 33.4 5.00 168 329 < 1.000 69.6 540 1160

• 1580 0.924 8/19/2004 ENER 510 1110

• 1532 3/23/2005 ENER 156 39.6 5.80 179 324 < 1.000 72.0 523 1180

• 1656 1.04 #Signifies Quality Control Sample

• Signifies Specific Conductivity from HMC A-33 --------------------

---

TABLE A.1-3 WATER QUALITY FOR THE SOUTH IRRIGATION SUPPLY WELLS (cont'd.)

Major Constituents Sample Point Ca Mg K Na HC03 C03 Cl 504 TDS Cond(calc.)

lon_B Name Date Lab (mg/I) (mg/I) (mg/I) (mg/I) (mg/I) (mg/I) (mg/I) (mg/I) (mg/I) (micromhos/ (ratio) 0648 8/10/2009 ENER 465 1110

• 1560 10/4/2006 ENER 538 1200

• 1712 5/1/2007 ENER 161 38.9 4.60 182 320 < 1.000 77.0 558 1270

• 1692 1.01 8/22/2007 ENER 578 1300

• 1826 4/10/2008 ENER 181 44.4 5.00 202 369 < 1.000 78.0 622 1250

• 1784 1.02 0649 1/16/1997 ENER 164 39.2 4.60 172 344 0 62.0 631 1370 0.926 3/4/1997 ENER 161 39.1 4.50 171 359 0 59.3 567 1300 0.971 4/17/1997 ENER 601 1240 4/23/1997 HMC 4/28/1997 HMC 4/29/1997 HMC 4/29/1997 HMC 4/29/1997 HMC 4/29/1997 HMC 4/29/1997 HMC 4/29/1997 HMC 5/2/1997 HMC 5/2/1997 HMC 5/2/1997 HMC 5/2/1997 HMC 5/2/1997 HMC 5/6/1997 ENER 7/9/1997 ENER 172 39.3 4.40 170 285 < 0.100 67.8 632 1270 0.979 1/21/1998 ENER 627 1260 1/21/1998 ENER # 616 # 1250 7/21/1998 ENER 155 37.3 4.30 176 287 < 1.000 51.1 581 1330 1.02 12/17/1998 ENER 148 35.5 4.10 164 294 < 1.000 49.5 543 1230 0.999 7/21/1999 ACZ # 540 # 1220 7/21/1999 ENER 554 1180 # Signifies Quality Control Sample *Signifies Specific Conductivity from HMC A-34 TABLE A.1-3 WATER QUALITY FOR THE SOUTH IRRIGATION SUPPLY WELLS (cont'd.)

Major Constituents Sample Point Ca Mg K Na HC03 C03 Cl 804 TDS Cond(calc.)

lon_B Name Date Lab (mg/I) (mg/I) (mg/I) (mg/I) (mg/I) (mg/I) (mg/I) (mg/I) (mg/I) (micromhos/ (ratio) 0649 7/21/1999 ENER # 577 # 1190 10/28/1999 ENER 559 1150 9/6/2000 ENER 606 1400 8/15/2001 ENER 470 1100 8/15/2001 ENER # 470 # 1120 8/12/2002 ENER 459 1090 8/2112003 ENER 49.7 477 1050

• 1430 4/23/2004 HMC . 1510 8/19/2004 ENER 126 30.3 4.40 164 343 < 1.000 54.0 477 1010

• 1439 0.937 3/28/2005 ENER 691 1660

• 2330 8/10/2005 ENER 131 31.6 3.70 176 320 < 1.000 47.0 441 1060

• 1500 1.07 10/4/2006 ENER 154 39.0 4.50 177 320 < 1.000 71.0 509 1240

• 1768 1.05 5/1/2007 ENER 534 1210

• 1672 8/22/2007 ENER 153 38.0 4.70 199 342 < 1.000 80.0 524 1300

• 1709 1.04 10/22/2007 ENER 164 44.1 5.10 208 391 < 1.000 93.0 564 1250

• 1837 1.01 4/10/2008 ENER 656 1210

• 1708 6/3/2008 ENER 610 1210

• 1740 10/2/2008 ENER 168 42.6 4.50 192 317 < 1.000 92.0 583 1300

• 1781 1.02 5/6/2009 ENER 606 1310

• 1832 6/16/2009 ENER 646 1350

• 1874 11/13/2009 ENER 194 44.6 4.60 200 334 < 1.000 117 667 1420

• 2004 0.977 4/20/2010 ENER 94.0 686 1470

• 1955 6/28/2010 ENER 697 1450

• 2001 8/28/2010 ENER 252 59.5 5.10 193 348 < 5.00 136 784 1730

• 2220 0.999 2/9/2011 ENER 106 689 1440

• 1968 4/18/2011 ENER 706 1470

• 1936 5/11/2011 ENER . 196 45.5 5.00 211 305 6.00 114 696 1460

• 1912 0.997 6/13/2011 ENER 698 1470

• 2012 8/16/2011 ENER 205 46.8 4.90 219 315 < 5.00 121 725 1450

• 1966 0.996 # Signifies Quality Control Sample

• Signifies Specific Conductivity from HMC A-35 -------------------

---

TABLE A.1-3 WATER QUALITY FOR THE SOUTH IRRIGATION SUPPLY WELLS (cont'd.)

Major Constituents Sample Point Ca Mg K Na HC03 C03 Cl 504 TDS Cond(calc.)

lon_B Name Date Lab (mg/I) (mg/I) (mg/I) (mg/I) (mg/I) (mg/I) (mg/I) (mg/I) (mg/I) (micromhos/ (ratio) 0649 3/13/2012 ENER 213 47.8 5.10 215 321 < 5.00 122 700 1560

• 2115 1.03 5/9/2012 ENER ---------------------713 1610

• 2118 7/9/2012 ENER ---------------------678 1540

• 2144 8/1/2012 ENER ------------------129 727 1570

• 2150 9/20/2012 ENER ------------------102 676 1440

• 1550 2/6/2013 HMC 214 49.6 5.00 207 333 < 5.00 132 728 1580 2128 0.975 3/6/2013 ENER ---------------------725 1570

• 2155 8/15/2013 ENER ------------------141 765 1680 4/1/2014 ENER ---------------------813 1850

• 2433 3/4/2015 ENER 283 64.6 5.10 231 373 < 5.00 190 902 1950

• 2567 0.974 2/22/2016 ENER 245 59.3 5.10 233 359 < 5.00 168 795 1770 2328 1.00 3/15/2017 ENER 238 56.0 5.00 223 377 < 5.00 151 771 1920 2265 0.987 0653 4/22/1997 ENER 205 51.2 6.40 346 344 0 176 827 1988 ---1.07 5/13/1997 HMC 5/13/1997 HMC 5/13/1997 HMC 5/13/1997 HMC 5/13/1997 HMC 5/13/1997 HMC 5/13/1997 HMC 5/13/1997 HMC 5/13/1997 HMC 5/13/1997 HMC 5/13/1997 HMC 5/13/1997 HMC 6/2/1997 ENER 201 50.2 6.20 342 345 0 180 914 2010 ---0.981 4/15/1998 ENER 196 50.0 6.00 337 360 < 1.000 172 907 1970 ---0.968 10/19/1998 ENER ---------------------888 1930 7/12/2000 ENER -------------------776 1920 *Signifies Specific Conductivity from HMC A -36

• -------------------

---

TABLE A.1-3 WATER QUALITY FOR THE SOUTH IRRIGATION SUPPLY WELLS (cont'd.)

Major Constituents Sample Point Ca Mg K Na HC03 C03 Cl 504 TDS

• Cond{calc.)

lon_B Name Date Lab {mg/I) {mg/I) {mg/I) {mg/I) (mg/I) {mg/I) (mg/I) (mg/I) (mg/I) (micromhos/ (ratio) 0657 5/13/1997 HMC 8/5/1999 ENER 180 48.2 6.70 164 326 < 1.000 91.3 550 1350 1.04 10/28/1999 ENER 640 1420 9/6/2000 ENER 635 1490 5/4/2001 ENER 614 1590 9/17/2001 ENER 597 1540 5/8/2002 ENER 701 1550 10/2/2002 ENER --663 1530 5/27/2003 ENER 179 839 1910 9/18/2003 ENER 145 723 1590

• 2098 4/23/2004 HMC 2160 5/13/2004 ENER 700 1640

• 2147 9/14/2004 ENER ---595 1430

• 1914 5/9/2005 ENER 695 1560

• 2131 9/26/2005 ENER 571 1410

• 1941 8/30/2006 ENER 691 1560 5/1/2007 ENER 655 1560

• 2093 8/22/2007 ENER 628 1600

• 2144 10/22/2007 ENER 637 1500

• 2066 4/10/2008 ENER 675. 1490

• 2063 5/6/2009 ENER 690 1580

• 2044 9/16/2009 ENER 733 1610

• 2228 9/16/2009 EPA6 # 224 # 59.2 # 6.06 # 214 # 132 # 751 # 1520 11/6/2009 ENER 144 736 1580

• 2257 4/21/2010 ENER 138 733 1700

• 2267 8/28/2010 ENER 135 720 1690

• 2200 5/11/2011 ENER 744 1650

• 2269 5/9/2012 ENER 727 1740

• 2285 5/13/2013 ENER 675 1610

• 2162 # Signifies Quality Control Sample

• Signifies Specific Conductivity from HMC A-38 TABLE A.1-3 WATER QUALITY FOR THE SOUTH IRRIGATION SUPPLY WELLS {cont'd.)

Major Constituents Sample Point Ca Mg K Na HC03 C03 Cl 504 TDS Cond(calc.)

lon_B Name Date Lab (mg/I) (mg/I) (mg/I) (mg/I) (mg/I) (mg/I) *(mg/I) (mg/I) (mg/I) (micromhos/ (ratio) 0657 8/8/2013 ENER ---------------------638 1590 0658 5/13/1997 HMC 5/13/1997 HMC 5/13/1997 HMC ------------------5/13/1997 HMC 4/13/1999 ENER 183 41.6 4.80 167 323 < 1.000 69.5 604 1340 ---1.00 10/28/1999 ENER ---------------------650 1280 9/2/2000 ENER ---------------------597 1310 9/17/2001 ENER ---------------------543 1310 10/2/2002 ENER ---------------------624 1300 9/18/2003 ENER ------------------63.0 617 1250

• 1644 4/23/2004 HMC ---------------------------1740 9/14/2004 ENER ------------------74.0 616 1240

• 1668 9/26/2005 ENER ------------------60.0 554 1180

• 1637 10/4/2006 ENER ------------------72.0 527 1270

• 1844 8/22/2007 ENER ------------------92.0 574 1400

• 1881 6/3/2008 ENER ---------------------597 1180

• 1613 10/2/2008 ENER ------------------76.0 617 1300

• 1779 6/16/2009 ENER ---------------------686 1410

• 1898 9/16/2009 ENER ------------------119 779 1630

• 2108 9/16/2009 EPA6 # 224 # 52.2 # 5.52 # 236 ------# 109 # 808 # 1580 11/9/2009 ENER ------------------126 812 1650

• 2274 4/20/2010 ENER ------------------103 735 1600

• 2097 8/28/2010 ENER ------------------130 693 1600

• 2140 10/27/2010 ENER -------------------96.0 696 1520

• 2038 2/9/2011 ENER ------------------78.0 620 1280

• 1788 5/11/2011 ENER 141 32.0 4.60 203 291 8.00 63.0 538 1130 *1627 1.03 6/13/2011 ENER ---------------------547 1140

• 1619 3/13/2012 ENER 144 32.9 4.40 195 285 < 5.00 62.0 524 1190

• 1662 1.06 # Signifies Quality Control Sample

• Signifies Specific Conductivity from HMC A-39 -------------------

---

TABLE A.1-3 WATER QUALITY FOR THE SOUTH IRRIGATION SUPPLY WELLS (cont'd.)

/ Major Constituents Sample Point Ca Mg K Na HC03 C03 Cl 804 TDS Cond(calc.)

lon_B Name Date Lab (mg/I) (mg/I) (mg/I) (mg/I) (mg/I) (mg/I) (mg/I) (mg/I) (mg/I) (micromhos/ (ratio) 0658 7/9/2012 ENER 534 1190

• 1650 8/1/2012 ENER 68.0 555 1180

• 1667 8/1/2012 ENER # 66.0 # 543 # 1190 9/20/2012 ENER 71.0 573 1230

• 1329 1117/2012 ENER 169 39.6 4.80 215 306 < 5.00 79.0 616 1340

• 1825 1.05 2/6/2013 HMC 145 33.3 4.40 188 308 < 5.00 73.0 593 1270 1750. 0.931 ' 10/29/2013 ENER 87.0 602 1300 2/25/2014 ENER 154 36.7 4.50 189 283 < 5.00 87.0 556 1240

• 1747 1.01 8/26/2014 ENER 105 600 1350

• 1859 2/19/2015 ENER 198 47.2 5.50 190 357 < 5.00 120 639 1440

• 1977 0.976 2/21/2017 ENER 181 45.5 4.80 178 365 < 5.00 115 571 1350 0.970 2/21/2017 ENER 1877 0687 10/4/1995 ENER 165 41.4 5.80 143 315 < 0.100 96.0 450 1151

• 1728 1.04 12/13/1995 ENER 212 54.5 6.40 238 332 < 0.100 0.0900 703 1677 *2326 1.27 3/12/1996 ENER 254 63.8 6.20 213 332 < 0.100 198 802 1581 *2326 0.986 7/29/1996 ENER 200 48.9 6.50 190 326 < 0.100 146 592 1460 *2208 1.03 11/11/1996 ENER 199 50.1 6.50 211 329 < 0.100 156 607 1520 *2208 1.04 6/3/1997 HMC 6/3/1997 HMC 6/3/1997 HMC 6/3/1997 HMC 6/3/1997 HMC 6/3/1997 HMC 6/3/1997 HMC 9/8/1997 ENER 701 1640 3/24/1998 ENER 225 57.0 6.70 238 355 < 1.000 168 709 1740 1.04 3/24/1998 ENER # 231 # 58.7 # 6.90 # 238 # 356 # < 1.000 # 176 # 723 # 1720 # 1.04 9/29/1998 ENER 648 1590 9/29/1999 ENER 748 1690 # Signifies Quality Control Sample * *Signifies Specific Conductivity from HMC A-40 TABLE A.1-3 WATER QUALITY FOR THE SOUTH IRRIGATION SUPPLY WELLS (cont'd.)

Major Constituents Sample Point Ca Mg K Na HC03 C03 Cl S04 TDS Cond(calc.)

lon_B Name Date Lab (mg/I) (mg/I) (mg/I) (mg/I) (mg/I) (mg/I) (mg/I) (mg/I) (mg/I) (micromhos/ (ratio) 0687 91612000 ENER 741 1810 9/25/2001 ENER 720 1850 712412002 ENER 817 1880 9/18/2003 ENER 128 657 1500

• 2000 4/23/2004 HMC 2040 9/14/2004 ENER 641 1480

• 1968 3/28/2005 ENER 554 1320

• 1875 9/26/2005 ENER 92.0 549 1380

• 1871 5/1/2007 ENER 593 1410

• 1892 0855 3/31/1995 ENER 125 30.0 5.30 281 233 < 0.100 87.0 729 1467 *2068 0.982 3/31/1995 ENER 120 29.0 5.20 279 220 < 0.100 86.0 725 1437

• 2081 0.977 11/17/1995 ENER 116 27.0 5.00 281 ;.... 209 < 0.100 86.0 705 1393

• 2119 0.992 1/11/1996 ENER 125 28.0 5.20 288 209 < 0.100 86.0 756 1489

• 2053 0.982 5/8/1996 ENER .. 127 28.3 5.70 290 205 < 0.100 96.2 759 1503

• 2197 0.979 11/19/1996 ENER 131 29.3 5.33 301 207 < 0.100 91.1 771 1500

• 2197 1.01 7/10/1997 HMC 7/10/1997 HMC 7/10/1997 HMC 7/10/1997 HMC 7/10/1997 HMC 7/11/1997 HMC 7/14/1997 HMC 7/14/1997 HMC 8/21/1997 ENER 798 1550 1/21/1998 ENER 799 1540 8/10/1998 ENER 787 1610 9/1/1999 ENER 754 1590 8/23/2000 ENER 725 1640 8/23/2001 ENER 700 1770

• Signifies Specific Conductivity from HMC A-41 -------------------

r-----------------------

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TABLE A.1-3 WATER QUALITY FOR THE SOUTH IRRIGATION SUPPLY WELLS (cont'd.)

Major Constituents Sample Point Ca Mg K Na HC03 C03 Cl 504 TDS Cond(calc.)

lon_B Name Date Lab (mg/I) (mg/I) (mg/I) (mg/I) (mg/I) (mg/I) (mg/I) (mg/I) (mg/I) (micromhos/ (ratio) 0855 7/24/2002 ENER 791 1670 8/19/2002 ENER 793 1720 8/21/2003 ENER 131 878 1630

• 1969 8/19/2004 ENER 863 1680

• 2269 2/7/2005 ENER 761 1620

• 2255 7/18/2007 ENER 767 1590 9/12/2007 ENER 820 1570

• 2240 0862 6/1/1995 ENER 209 57.0 5.30 312 451 < 0.100 174 824 1935 0.978 6/1/1995 HMC 2714 11/13/1995 ENER 200 53.0 5.40 320 384 < 0.100 170 844 1973

• 2649 0.991 1/26/1996 ENER 229 56.6 5.60 334 381 < 0.100 178 949 1965

• 2646 0.991 5/7/1996 ENER 210 53.6 5.80 318 377 < 0.100 182 858 1943

• 2587 0.989 12/2/1996 ENER 211 55.3 5.80 342 406 < 0.100 178 855 1930

• 2782 1.02 7/21/1997 HMC 7/21/1997 HMC 7/21/1997 HMC 7/21/1997 HMC 7/21/1997 HMC 7/21/1997 HMC 8/14/1997 ENER 1230 1920 8/17/1998 ENER 817 1880 9/1/1999 ENER 756 1890 8/22/2000 ENER 687 1930 8/20/2001 ENER 660 1980 8/19/2002 ENER 766 1980 8/21/2003 ENER 212 855 1950

• 2592 8/19/2004 ENER 219 847 1950

• 2609 2/2/2005 ENER 213 727 1950 *2564 9/27/2005 ENER 166 789 1950 *2652 *Signifies Specific Conductivity from HMC A-42 TABLE A.1-3 WATER QUALITY FOR THE SOUTH IRRIGATION SUPPLY WELLS (cont'd.)

Major Constituents Sample Point Ca Mg K Na HC03 C03 Cl 504 TDS Cond(calc.)

lon_B Name Date Lab (mg/I) (mg/I) (mg/I) (mg/I) (mg/I) (mg/I) (mg/I) (mg/I) (mg/I) (micromhos/ (ratio) 0862 1/10/2006 ENER 182 769 1870

• 2565 8/16/2006 ENER 105 912 1800

• 2539 1/31/2007 ENER 185 831 2010

• 2625 9/12/2007 ENER 187 783 1850

• 2575 1/14/2008 ENER 187 773 1870

• 2554 10/1/2008 ENER 177 769 1840 *2560 1/13/2009 ENER 185 804 1950

• 2621 712012009 ENER 178 749 1870 *2550 3/1/2010 ENER 194 52.1 5.80 322 531 < 5.00 181 773 1760

• 2637 0.935 5/25/2010 ENER 185 838 1970

• 2695 1/12/2011 ENER 185 839 1880

• 2055 10/19/2011 ENER 184 781 1820

• 2572 5/22/2012 ENER 177 736 1910

• 2557 5/3/2013 ENER 181 736 1870 *2733 1/28/2014 ENER 186 777 1850 *2570 6/11/2014 ENER 184 1540 1860 *2572 10/17/2014 ENER 174 719 1820 *2543 5/14/2015 ENER 192 749 1850

• 2539 5/6/2016 ENER 197 53.4 5.80 305 434 < 5.00 185 711 1820 2485 1.01 8/4/2016 ENER 142 568 1480 2045 10/24/2016 ENER 176 48.5 5.50 259 407 < 5.00 157 640 1600 2233 0.983 11/30/2016 ENER 145 675 1590 3/21/2017 ENER 163 44.2 6.10 238 356 < 5.00 137 685 1510 2183 0.923 0863 6/1/1995 ENER 209 58.0 5.90 322 378 < 0.100 178 800 1907

• 2877 1.05 11/13/1995 ENER 201 54.0 5.90 330 459 < 0.100 176 832 1998

• 2715 0.972 1/26/1996 ENER 229 58.0 6.10 345 456 < 0.100 180 922. 1994

• 2782 0.988 5/7/1996 ENER 211 55.7 6.50 339 453 < 0.100 180 835 1995

• 2833 1.00 12/2/1996 ENER 216 57.5 6.50 357 475 < 0.100 185 848 1960

• 2782 1.02 7/21/1997 HMC

• Signifies Specific Conductivity from HMC A-43 -------------------

---

TABLE A.1-3 WATER QUALITY FOR THE SOUTH IRRIGATION SUPPLY WELLS (cont'd.)

Major Constituents Sample Point Ca Mg K Na HC03 C03 Cl 504 TDS Cond(calc.)

lon_B Name Date Lab (mg/I) (mg/I) (mg/I) (mg/I) (mg/I) (mg/I) (mg/I) (mg/I) (mg/I) (micromhos/ (ratio) 0863 7/21/1997 HMC 7/22/1997 HMC 7/22/1997 HMC 7/22/1997 HMC 7/22/1997 HMC 8/12/1997 ENER ---------------------840 1950 8/17/1998 ENER ---------------------826 1950 8/17/1998 ENER ---------------------# 826 # 1940 9/1/1999 ENER ---------------------776 1950 812512000 ENER ---------------------789 1960 8/20/2001 ENER ---------------------670 1980 8/19/2002 ENER ---------------------761 1960 21212006 HMC --------------------------2349 8/16/2006 ENER ------------------97.0 893 1660

• 2465 9/12/2007 ENER -----------------174 732 1660

• 2388 9/20/2012 ENER ------------------179 674 1720

• 2120 0865 6/5/1995 ENER 263 60.0 7.10 322 240 < 0.100 165 1123 2281

• 2967 1.01 11/10/1995 ENER 257 56.2 6.90 334 251 < 0.100 160 1125 2297

• 3053 1.00 1/26/1996 ENER 284 60.5 6.90 314 254 < 0.100 174 1148 2283

• 2990 1.00 5/7/1996 ENER 270 56.7 7.30 328 245 < 0.100 168 1157 2274

• 2767 0.992 12/2/1996 ENER 275 58.6 7.50 342 264 < 0.100 170 1160 2230

• 2986 1.01 7/24/1997 HMC 7/24/1997 HMC 7/28/1997 HMC 7/28/1997 HMC 7/28/1997 HMC 7/28/1997 HMC 8/12/1997 ENER ---------------------1100 2180 8/17/1998 ENER ---------------------1060 2090 # Signifies Quality Control Sample

• Signifies Specific Conductivity from HMC A-44 TABLE A.1-3 WATER QUALITY FOR THE SOUTH IRRIGATION SUPPLY WELLS (cont'd.)

Major Constituents Sample Point Ca Mg K Na HC03 C03' Cl 804 TDS Cond(calc.)

lon_B Name Date Lab (mg/I) (mg/I) (mg/I) (mg/I) (mg/I) (mg/I) (mg/I) (mg/I) (mg/I) (micromhos/ (ratio) 0865 8/31/1999 ENER 986 2040 8/22/2000 ENER 842 1970 8/20/2001 ENER 760 1970 8/20/2002 ENER 790 1810 1/18/2006 HMC 2030 9/11/2007 ENER 151 708 1590

• 2205 10/1/2008 ENER 161 748 1630 *2220 8/10/2009 ENER 178 780 1780 *2550 3/1/2010 ENER 159 36.0 5.80 304 360 < 5.00 157 753 1570

• 2368 0.927 5/25/2010 ENER 172 837 1860

• 2399 8/28/2010 ENER 181 769 1900

• 2490 10/19/2011 ENER 165 764 1680

• 2398 9/20/2012 ENER ---164 737 1710

• 1818 10/17/2014 ENER 179 724 1800

• 2545

• 5/14/2015 ENER 199 737 1840

• 2541 8/20/2015 ENER 193 743 1830

• 2491 4/28/2016 ENER 200 45.3 7.90 323 425 < 5.00 200 780 . 1790 0.964 8/4/2016 ENER 175 698 1740 2440 0866 6/8/1995 ENER 220 59.0 6.90 334 519 < 0.100 187 887 2032

• 2687 0.947 11/10/1995 ENER 210 55.0 6.90 338 516 < 0.100 174 813 2046

• 2847 0.986 1/26/1996 ENER 235 59.9 6.80 326 521 < 0.100 192 854 2045

• 2782 0.977 5/7/1996 ENER 224 55.6 7.20 339 490 < 0.100 185 849 2024 *2839 0.992 11/22/1996 ENER 228 57.1 6.80 335 515 < 0.100 177 854 1990 *2847 0.987 8/5/1997 HMC 8/5/1997 HMC 8/5/1997 HMC 8/5/1997 HMC 8/5/1997 HMC 8/5/1997 HMC

• Signifies Specific Conductivity from HMC A-45 -------------------

---

TABLE A.1-3 WATER QUALITY FOR THE SOUTH IRRIGATION SUPPLY WELLS (cont'd.)

Major Constituents Sample Point Ca Mg K Na HC03 C03 Cl 804 TDS Cond(calc.)

lon_B Name Date Lab (mg/I) (mg/I) (mg/I) (mg/I) (mg/I) (mg/I) (mg/I) (mg/I) (mg/I) (micromhos/ (ratio) 0866 8/12/1997 ENER 821 2000 8/17/1998.

ENER 817 1960 8/31/1999 ENER 821 1980 8/31/1999 ENER # 782 # 1970 8/22/2000 ENER 716 1970 8/22/2000 ENER # 720 # 1960 8/23/2001 ENER 670 1940 8/19/2002 ENER 748 1870 1/18/2006 HMC 2338 9/11/2007 ENER 144 724 1660 *2322 10/1/2008 ENER 167 874 1940

• 2598 7/20/2009 ENER 168 721 1720

• 2400 9/11/2009 ENER 173 759 1780

• 2410 3/1/2010 ENER 165 38.5 7.30 308 464 < 5.00 168 706 1620

• 2419 0.918 5/25/2010 ENER 176 716 1760 *2478 10/19/2011 Ef\!ER 184 749 1740 *2574 9/20/2012 ENER 182 718 1860

• 1960 5/3/2013 ENER 173 674 1790

• 2713 8/5/2014 ENER 182 731 1830

• 2521 9/11/2014 ENER 183 723 1820

• 2521 10/17/2014 ENER 174 699 1790 . 10/21/2014 ENER 181 724 1830

• 2502 11/13/2014 ENER 178 708 1800

• 2522 12/23/2014 ENER 181 717 1810

• 2528 8/20/2015 ENER 184 742 1820 *2432 8/4i2016 ENER 183 836 1950 2618 11/39/2016 ENER 159 754 1900 3/3/2017 ENER 262 74.5 7.70 302 444 < 5.00 196 1050 2200 0.934 3/21/2017 ENER 194 51.3 6.40 294 443 < 5.00 168 811 1810 2488 0.924 # Signifies Quality Control Sample

• Signifies Specific Conductivity from HMC A-46 TABLE A.1-3 WATER QUALITY FOR THE SOUTH IRRIGATION SUPPLY WELLS (cont'd.)

Major Constituents Sample Point Ca Mg K Na HC03 C03 Cl 504 TDS Cond(calc.)

lon_B Name Date Lab (mgll) (mgll) (mgll) (mgll) (mg/I) (mg/I) (mg/I) (mg/I) (mg/I) (micromhos/ (ratio) 0869 7/20/1995 ENER 208 52.0 6.90 368 235 < 0.100 157 1018 2060

• 2813 1.05 11/13/1995 ENER 189 48.0 6.50 356 228 < 0.100 155 1003 2072

• 2779 1.00 1/12/1996 ENER 199 49.2 6.50 350 222 < 0.100 164 1055 2086

• 2715 0.971 5/8/1996 ENER 197 48.2 6.80 350 220 < 0.100 165 1033 2044

• 2843 0.981 11/19/1996 ENER 198 48.9 . 6.45 355 233 < 0.100 160 1021 2000

• 2781 0.997 4/17/1997 ENER 985 1980 8/11/1997 HMC 8/12/1997 HMC 8/12/1997 HMC 8/12/1997 HMC 8/12/1997 HMC 8/12/1997 HMC 8/12/1997 HMC 8/14/1997 HMC 8/14/1997 ENER 194 45.8 6.80 354 245 < 0.100 181 978 1980 0.984 4/14/1998 ENER 1010 1960 8/17/1998 ENER 180 45.2 7.20 350 264 < 1.000 161 891 1910 1.02 9/2/1999 ENER 912 1890 8/22/2000 ENER 800 1910 8/20/2001 ENER 690 1650 8/19/2002 ENER . 862 1960 8/21/2003 ENER 190 970 1930

• 2571 8/19/2004 ENER 205 960 1910

• 2523 217/2005 ENER 181 845 1800

• 2493 11/18/2005 ENER 171 867 1860

• 2561 12/11/2006 ENER 159 878 1870 *2522 4/30/2007 ENER 159 871 1930

• 2558 9/12/2007 ENER 171 880 1800

• 2550 3/31/2008 ENER 1760 *2486 *Signifies Specific Conductivity from HMC A-47 -------------------

---

*----'---TABLE A.1-3 WATER QUALITY FOR THE SOUTH IRRIGATION SUPPLY WELLS {cont'd.)

Major Constituents Sample Point Ca Mg K Na HC03 C03 Cl 504 TDS Cond(calc.)

lon_B Name Date Lab (mg/I) (mg/I) (mg/I) (mg/I) (mg/I) (mg/I) (mg/I) (mg/I) (mg/I) (micromhos/ (ratio) 0869 10/1/2008 ENER ------------------167 834 1820

• 2484 7/21/2009 ENER ------------------167 791 1820

• 2510 5/25/2010 ENER ------------------171 ' 783 1780 *2500 8/28/2010 ENER ------------------176 764 1740

• 2460 10/19/2011 ENER ------------------174 744 1690

• 2398 5/23/2012 ENER ------------------164 689 1760

• 2425 9/20/2012 ENER ------------------179 752 1760

• 1874 3/18/2013 HMC ------------------185 757 1770 2466 6/17/2013 ENER ------------------167 682 1770 *2444 7/18/2014 ENER ------------------181 754 1770

• 1890 0943 8/28/1956 UNK ---------378 305 < 0.100 88.0 563 6/15/1995 ENER 22.6 4.50 2.30 620 262 < 0.100 71.5 1066 2012

• 3102 1.00 6/15/1995 ENER 22.5 4.40 2.30 615 261 < 0.100 73.2 1053 2095

• 3102 1.00 6/12/1996 ENER 29.6 6.00 2.30 628 249 < 0.100 81.0 1189 2130 ---0.943 10/23/1996 ENER 31.4 6.60 . 2.60 641 320 < 0.100 83.5 1170 2080

• 3189 0.940 8/21/1997 ENER 9.20 5.60 2.90 654 215 5.80 91.0 1180 2040 ---0.954 10/20/1997 HMC 10/20/1997 HMC 10/20/1997 HMC 10/20/1997 HMC 10/21/1997 HMC 10/21/1997 HMC 10/21/1997 ENER 10/21/1997 ENER 8/18/1998 ENER 8.40 6.50 4.30 623 222 < 1.000 83.9 1100 1980 ---0.973 9/2/1999 ENER ---------------------1170 2070 9/2/1999 ENER --------------------# 1100 # 2020 8/23/2000 ENER ---------------------1070 2010 8/29/2001 ENER ------------------1000 2040 # Signifies Quality Control Sample

• Signifies Specific Conductivity from HMC A-48 TABLE A.1-3 WATER QUALITY FOR THE SOUTH IRRIGATION SUPPLY WELLS (cont'd.)

Major Constituents Sample Point Ca Mg K Na HC03 C03 Cl 504 TDS Cond(calc.)

lon_B Name Date Lab (mg/I) (mg/I) (mg/I) (mg/I) (mg/I) (mg/I) (mg/I) (mg/I) (mg/I) (micromhos/ (ratio) 0943 8/29/2001 ENER # 1000 # 2030 11/13/2002 ENER 1080 2010 10/27/2003 ENER 1090 2030

• 2899 3/9/2004 ENER 166 52.9 8.80 314 391 < 1.000 188 793 1830

• 2505 0.939 12/8/2004 ENER 690 1720

• 2315 4/19/2005 ENER 165 54.3 8.80 282 399 < 1.000 181 712 1680 *2365 0.951 12/5/2005 ENER 658 1690

• 2314. 3/16/2006 ENER 167 54.8 10.2 261 412 < 1.000 161 695 1670

• 2551 0.948 12/19/2006 ENER 191 62.4 9.80 282 298 < 1.000 188 716 1710 1.08 3/8/2007 ENER 178 58.5 9.20 310 403 < 1.000 175 753 1790

• 2420 1.01 12/3/2007 ENER 649 1700

• 2356 3/5/2008 ENER 181 56.2 9.40 288 422 < 1.000 177 742 1640

• 2411 0.965 9/16/2008 ENER 206 64.1 9.20 293 401 < 1.000 168 689 1650

• 2312 1.11 12/1/2008 ENER 666 1700

• 2344 6/15/2009 ENER 162 55.4 12.2 263 413 < 1.000 182 696 1670

• 2402 0.923 1217/2009 ENER 733 1670

• 2440 3/3/2010 ENER 176 56.0 8.70 302 467 < 5.00 171 697 1710

• 2494 0.985 6/22/2010 ENER 52.0 13.3 3.40 670 330 < 5.00 144 1150 2200

• 3378 0.980 8/5/2010 ENER 62.0 15.6 3.30 788 347 < 5.00 160 1330 2390

• 3502 1.02 9/21/2010 ENER 187 724 1700 *2425 10/27/2010 ENER 187 725 1740 *2446 12/6/2010 ENER

• 731 1770

• 2085 4/13/2011 ENER 195 60.6 10.00 316 439 < 5.00 185 713 1750

• 2497 1.05 1117/2011 ENER 686 1620

• 2384 8/16/2012 ENER 133 42.3 7.60 371 403 < 5.00 176 818 1850

• 2564 0.919 11/30/2012 ENER 182 784 1810

• 2480 2/19/2014 ENER 194 61.8 8.90 292 193 726 1760

• 2532 11/17/2014 ENER 195 61.3 8.90 283 449 < 5.00 200 737 1760

• 2497 0.958 2/17/2015 ENER 194 734 1790

• 2472 # Signifies Quality Control Sample

• Signifies Specific Conductivity from HMC A-49 ----*---------------

---

*-------TABLE A.1-3 WATER QUALITY FOR THE SOUTH IRRIGATION SUPPLY WELLS (cont'd.)

Major Constituents Sample Point Ca Mg K Na HC03 C03 Cl 804 TDS Cond(calc.)

lon_B Name Date Lab (mg/I) (mg/I) (mg/I) (mg/I) (mg/I) (mg/I) (mg/I) (mg/I) (mg/I) (micromhos/ (ratio) 0943 4/30/2015 ENER 189 58.6 9.30 283 444 < 5.00 205 746 1760

• 2434 0.932 8/7/2015 ENER 197 59.1 9.00 283 428 < 5.00 184 741 1730 *2397 0.980 10/8/2015 E.NER 1410 2640 12/10/2015 ENER 740 1780

• 2487 1/26/2016 ENER 189 61.4 8.50 283 446 < 5.00 191 722 1760 2521 0.968 2/25/2016 ENER 197 734 1770 2572 9/15/2016 ENER 181 1010 2010 2904 10/18/2016 ENER 980 1970 2857 2/10/2017 ENER 964 1920 3141 2/17/2017 ENER 167 948 1940 4217 2/28/2017 ENER 131 40.1 6.20 418 384 < 5.00 167 806 1950 2673 1.01 0996 9/18/1995 ENER 183 49.0 6.10 179 348 < 0.100 104 579 1346

• 1877 1.02 12/13/1995 ENER 219 57.6 6.80 227 372 < 0.100 116 748 1670

• 2251 1.03 3/12/1996 ENER 268 69.1 7.10 217 376 < 0.100 159 906 1687

• 2391 0.972 11/11/1996 ENER 228 59.0 6.90 229 378 < 0.100 136 794 1710

• 2391 *o.993 9/8/1997 ENER 206 50.0 6.00 178 325 < 0.100 98.1 656 1420 1.02. 11/8/1997 HMC 11/8/1997 HMC 11/8/1997 HMC 11/8/1997 HMC 11/8/1997 HMC 11/8/1997 HMC 11/8/1997 HMC 11/8/1997 HMC 11/19/1998 ENER 191 48.7 5.90 172 333 < 1.000 103 601 1490 1.01 9/29/1999 ENER 683 1470 9/29/1999 ENER # 642 # 1430 9/6/2000 ENER 697 1670 9/6/2000 ENER # 701 # 1690 # Signifies Quality Control Sample *Signifies Specific Conductivity from HMC A-50 TABLE A.1-3 WATER QUALITY FOR THE SOUTH IRRIGATION SUPPLY WELLS (cont'd.)

Major Constituents Sample Point Ca Mg K Na HC03 C03 Cl 504 TDS Cond(calc.)

lon_B Name Date Lab (mg/I) (mg/I) (mg/I) (mg/I) (mg/I) (mg/I) (mg/I) (mg/I) (mg/I) (micromhos/ (ratio) 0996 11/3/2000 ENER 215 58.1 6.10 178 332 < 1.000 103 748 1490 0.977 9/25/2001 ENER 610 1560 712412002 ENER 712 1570 9/18/2003 ENER 131 711 1560

• 2035 9i14/2004 ENER 119 646 1530

• 2030 9/26/2005 ENER 121 643 '1490

• 2048 8/30/2006 ENER 124 614 1470

• 1890 8/22/2007 ENER 101 606 1500

• 1960 9/16/2009 ENER 122 655 1470

• 2018 9/16/2009 EPA6 # 211 # 54.8 # 5.74 # 200 ' # 117 # 672 # 1470 11/9/2009 ENER 122 666 1470

• 2061 4/21/2010 ENER 123 674 1570

• 2103 8/27/2010 ENER 125 682 1530

• 2090 11/9/2011 ENER 124 684 1520

• 2044 9/20/2012 ENER 120 655 1550

• 1670 8/8/2013 ENER 134 602 1560 12/15/2016 ENER 143 591 1540 2117 CW29 6/5/1995 ENER 88.0 28.0 4.70 298 399 < 0.100 67.0 519 1417

• 1997 1.03 6nt1995 ENER 71.0 22.8 4.00 269 291 < 0.100 62.0 535 1059

• 1783 0.975 6/9/1995 ENER 73.0 22.7 3.90 260 233 < 0.100 57.3 546 1182

• 1808 1.01 11/13/1995 ENER 60.0 19.0 3.80 282 248 < 0.100 61.0 531 1148 1.00 11/13/1995 HMC 1809 10/14/1996 ENER 66.0 3.70 279 251 < 0.100 56.8 568 1160

• 1829 0.977 5/30/1997 ENER 537 1100 11/8/1997 ENER 64.7 19.7 4.30 279 253 < 0.100 59.0 537 1130 1.01 5/19/1998 ENER 543 1080 10/22/1998 HMC 10/22/1998 HMC ---10/28/1998 HMC # Signifies Quality Control Sample

• Signifies Specific Conductivity from HMC A-51 --*-----------------

---

*----TABLE A.1-3 WATER QUALITY FOR THE SOUTH IRRIGATION SUPPLY WELLS (cont'd.)

Major Constituents Sample Point Ca Mg K Na HC03 C03 Cl 504 TDS Cond(calc.)

lon_B Name Date Lab (mg/I) (mg/I) (mg/I) (mg/I) (mg/I) (mg/I) (mg/I) (mg/I) (mg/I) (micromhos/ (ratio) CW29 10/28/1998 HMC 10/28/1998 HMC 10/28/1998 HMC 10/28/1998 HMC 10/28/1998 HMC 11/5/1998 ENER 59.3 19.3 4.10 278 250 < 1.000 60.0 517 1080 1.01 6/3/1999 ENER 526 1140 6/21/2000 ENER 557 1100 6/6/2001 ENER 503 1050 612412002 ENER 479 1080 7/10/2003 ENER 103 28.4 4.50 300 232 < 1.000 79.5 612 1260

• 1828 1.10 21512004 108 698 1430 *2070 7/13/2004 ENER 115 30.5 5.50 323 243 < 1.000 127 741 1430

• 2040 0.975 5/17/2005 ENER 103 668 1450

• 2035 8/14/2006 ENER 118 32.9 5.00 313 260 < 1.000 110 665 1420

• 2064 1.05 4/30/2007 ENER 121 675 1530

• 2096 9/12/2007 ENER 130 35.6 5.30 312 287 < 1.000 126 728 1440

• 2088 0.986 3/31/2008 ENER 129 750 1500

• 2194 6/15/2009 ENER 124 33.7 5.0Q 324 300 < 1.000 134 703 1580 .

• 2185 0.992 5/25/2010 ENER 132 35.4 5.00 315 360 < 5.00 148 723 1630

• 2296 0.922 8/28/2010 ENER 147 704 1670 *2270 4/18/2011 ENER 156 728 1610

• 2272 7/18/2011 ENER 154 41.4 5.80 355 358 < 5.00 154 720 1610 *2294 1.05 5/22/2012 ENER 167 681 1800 *2323 3/19/2013 ENER 163 722 1630 *2340 6/17/2013 ENER 151 41.1 5.40 324 373 < 5.00 160 720 1640 *2330 0.975 10/3/2014 ENER 154 42.1 5.50 325 384 < 5.00 164 702 1680

• 2552 . 0.989 3/19/2015 ENER 712 1690 2419 8/19/2015 ENER 170 723 1690 *2389

• Signifies Specific Conductivity from HMC A-52 TABLE A.1-3 WATER QUALITY FOR THE SOUTH IRRIGATION SUPPLY WELLS (cont'd.)

Major Constituents Sample Point Ca Mg K Na HC03 C03 Cl 804 TDS Cond(calc.)

lon_B Name Date Lab (mg/I) . (mg/I) (mg/I) (mg/I) (mg/I) (mg/I) (mg/I) (mg/I) (mg/I) (micromhos/ (ratio) CW29 5/6/2016 ENER 149 41.0 5.00 274 320 < 5.00 142 604 1490 2186 1.04 3/20/2017 ENER 2339 3/20/2017 ENER 167 714 1650 CW42 11/11/1996 ENER 220 54.0 6.50 350 334 < 0.100 169 979 2070

• 2718 1.01 11/12/1996 ENER 152 40.8 5.20 300 275 < 0.100 115 787 1630

• 2045 0.999 1/23/1997 ENER 210 52.3 6.25 343 333 <O 168 946 1890 0.999 4/23/1997 ENER 226 54.6 6.50 351 349 0 174 1009 2101 0.986 9/29/1997 ENER 975 2060 4/14/1998 ENER 218 54.0 6.00 343 362 < 1.000 174 982 2070 0.970 9/28/1998 ENER 941 2050 12/6/1998 HMC 12/6/1998 HMC 12/6/1998 HMC 12/6/1998 HMC 12/6/1998 HMC 12/6/1998 HMC 12/6/1998 HMC 12/6/1998 HMC 12/6/1998 HMC 12/6/1998 HMC 9/2/1999 ENER 957 1990 9/6/2000 ENER 833 2000 9/27/2001 ENER 770 1980 10/2/2002 ENER 851 1920 7/17/2003 ENER 201 51.9 6.90 339 348 < 1.000 176 898 1930

• 2533 0.994 8/4/2004 ENER 836 1810 .* 2384 2/21/2005 ENER 744 1720

• 2347 12/13/2005 ENER 150 718 1720 *2380 8/16/2006 ENER 168 722 1630 *2354

• Signifies Specific Conductivity from HMC A-53 -------------------

---

TABLE A.1-3 WATER QUALITY FOR THE SOUTH IRRIGATION SUPPLY WELLS (cont'd.)

Major Constituents Sample Point Ca Mg K Na HC03 C03 Cl 804 TDS Cond(calc.)

lon_B Name Date Lab (mg/I) (mg/I) (mg/I) (mg/I) (mg/I) (mg/I) (mg/I) (mg/I) (mg/I) (micromhos/ (ratio) CW42 4/30/2007 ENER 635 1600

• 2166 9/13/2007 ENER 137 719 1540

• 2126 3/31/2008 ENER 741 1670

• 2417 10/1/2008 ENER 134 676 1480

• 2093 6/15/2009 ENER 148 687 1740 *2242 8/19/2009 ENER 167 710 1690

• 2388 5/25/2010 ENER 177 737 1750

• 2467 2128/2011 ENER 743 1750 *2445 7/18/2011 ENER 180 743 1770

• 2438 5/22/2012 ENER 638 1690

• 2483 6/17/2013 ENER 176 706 1720

• 2451 11/14/2013 ENER 175 701 1730 10/10/2014 ENER 185 730 1810

• 2441 8/18/2015 ENER 147 593 1450

• 2250 8/9/2016 ENER 183 710 1770 2476 8/24/2016 ENER 170 666 1650 2343 3/21/2017 ENER 732 1740 2418 CW44 2/26/1997 ENER 243 65.1 6.10 355 529 0 186 860 2040 1.04 4/22/1997 ENER 238 60.3 5.80 331 540 0 184 844 2059 0.993 5/15/1997 ENER r 242 60.7 5.90 338 542 0 198 860 2050 0.986 9/12/1997 ENER 251 64.0 6.20 348 531 < 0.100 208 909 2060 0.988 4/13/1998 ENER 233 61.0 6.00 333 540 < 1.000 186 849 2050 0.984 9/28/1998 ENER 834 2040 1217/1998 HMC 1217/1998 HMC 1217/1998 HMC 1217/1998 HMC 1217/1998 HMC 1217/1998 HMC *Signifies Specific Conductivity from HMC A-54 TABLE A.1-3 WATER QUALITY FOR THE SOUTH IRRIGATION SUPPLY WELLS {cont'd.)

Major Constituents Sample Point Ca Mg K Na HC03 C03 Cl 504 TDS Cond(calc.)

lon_B Name Date Lab (mg/I) (mg/I) (mg/I) (mg/I) (mg/I) (mg/I) (mg/I) (mg/I) (mg/I) (micromhos/

• (ratio) CW44 12/7/1998 HMC 1217/1998 HMC 1217/1998 HMC 1217/1998 HMC 12/17/1998 HMC 12/17/1998 HMC 12/17/1998 HMC 12/28/1998 HMC 12/28/1998 ENER 10/28/1999 ENER 826 1970 5/9/2000 ENER 816 1930 5/9/2000 ENER # 866 # 1950 8/15/2000 ENER 693 1930 5/4/2001 ENER # 718 # 2010 5/4/2001 ENER 723 2010 9/17/2001 ENER 695 1950 5/8/2002 ENER 822 1970 10/2/2002 ENER 783 1970 5/27/2003 ENER 195 780 1970 7/9/2003 ENER 237 65.0 5.70 334 533 < 1.000 197 777 1950

• 2590 1.04 7/22/2004 ENER 767 2070

• 2630 12/12/2005 ENER 163 712 1850

• 2549 8/14/2006 ENER 177 701 1740

• 2479 9/11/2007 ENER 174 722 1840

• 2498 6/9/2009 ENER 184 732 1840

• 2470 5/26/2010 ENER 181 732 1840

• 2523 8/9/2011 ENER 179 736 1800

• 2464 10/9/2012 ENER 180 718 1850

• 2505 11/14/2013 ENER 183 705 1830 # Signifies Quality Control Sample

• Signifies Specific Conductivity from HMC A-55 -------------------

--* -----------------TABLE A.1-3 WATER QUALITY FOR THE SOUTH IRRIGATION SUPPLY WELLS (cont'd.)

Major Constituents Sample.Point Ca Mg K Na HC03 C03 Cl 504 TDS Cond(calc.)

lon_B Name Date Lab (mgll) (mgll) (mgll) (mg/I) (mgfl) (mgll) (mgll) (mgll) (mgll) (micromhos/ (ratio) CW44 6/11/2014 ENER 199 789 1840

• 2526 9/9/2014 ENER 192 768 1860

• 2560 7/29/2015 ENER 199 887 2010 *2705 7/5/2016 ENER 232 56.9 6.00 294 458 < 5.00 171 848 1970 2569 0.968 12/1/2016 ENER 163 808 1840 2508 CW45 2/26/1997 ENER 255 63.3 5.80 364 445 0 180 984 2130 1.03 4/22/1997 ENER 235 56.3 5.30 346 460 0 172 946 2084 0.983 9/29/1997 ENER 848 1920 4/13/1998 ENER 222 56.0 5.00 333 447 < 1.000 175 899 2000 0.977 9/28/1998 ENER 837 1910 12/28/1998 HMC 1/7/1999 HMC 1/7/1999 HMC 1nt1999 HMC 1/7/1999 HMC 1/7/1999 HMC 1/19/1999 HMC 1/19/1999 HMC 1/19/1999 HMC 1/19/1999 HMC 1/19/1999 ENER 9/29/1999 ENER 778 1860 / 9/29/1999 ENER # 826 # 1860 8/15/2000 ENER 682 1780 9/26/2001 ENER 650 1730 10/2/2002 ENER 720 1810 7/16/2003 ENER 184 49.1 5.30 314 465 < 1.000 175 707 1740

• 2383 0.989 4/17/2004 HMC 2560 712212004 ENER 744 1950

• 2465 # Signifies Quality Control Sample

• Signifies Specific Conductivity from HMC A-56

• ' TABLE A.1-3 WATER QUALITY FOR THE SOUTH IRRIGATION SUPPLY WELLS (cont'd.)

Major Constituents Sample Point Ca Mg K Na HC03 C03 Cl 504 TDS Cond(calc.)

lon_B Name Date Lab (mg/I) (mg/I) (mg/I) (mg/I) (mg/I) (mg/I) (mg/I) (mg/I) (mg/I) (micromhos/ (ratio) CW45 4/11i2005 ENER 679 1720

• 2416 8/14/2006 ENER 186 665 1720

• 2500 3/26/2007 ENER 663 1580

• 2261 9/11/2007 ENER 183 713 1830 *2560 3/31/2008 ENER 792 1600 *2398 10/1/2008 ENER 185 721 1810

• 2501 6/2/2009 ENER 695 1680 *2437 5/26/2010 ENER 186 697 1820

• 2530 4/18/2011 ENER 706 1730

• 2485 8/9/2011 ENER 183 686 1710

• 2465 5/7/2012 ENER 670 .1770 *2492 111712012 ENER 187 49.1 5.00 358 548 < 5.00 183 681 1780

• 2516 1.02 3/6/2013 ENER 679 1710

• 2475 6/17/2013 ENER 171 645 1690 *2452 11/14/2013 ENER 173 645 1730

• 2393 11/13/2014 ENER 163 630 1660

• 2373 12/23/2014 ENER 157 614 1620

• 2352 3/31/2015 ENER 1.77 44.5 4.80 330 558 < 5.00 163 637 1670

• 2311 0.993 8/19/2015 ENER 638 1670

• 2368 3/4/2016 ENER 169 45.4 5.20 339 522 < 5.00 160 636 1660 2349 1.02 8/26/2016 ENER 617 1610 2304 3/24/2017 ENER 153 39.9 4.20 283 516 < 5.00 145 625 1530 2278 ,,, 0.907 CW53 1/22/1999 . HMC 1/26/1999 ENER ---612812004 ENER 59.2 15.0 3.30 484 446 < 1.000 129 784 1740

• 2518 0.928 12/12/2005 ENER 174. 641 1800

• 2504 10/11/2006 ENER 190 657 1810

• 3051 11/13/2007 ENER 190 698 1790 *2827 6/2/2008 ENER 195 745 1800 *2894

• Signifies Specific Conductivity from HMC A-57 -------------------

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TABLE A.1-3 WATER QUALITY FOR THE SOUTH IRRIGATION SUPPLY WELLS (cont'd.)

Major Constituents Sample Point Ca Mg K Na HC03 C03 Cl 804 TDS Cond(calc.)

lon_B Name Date Lab (mg/I) (mg/I) (mg/I) (mg/I) (mg/I) (mg/I) (mg/I) (mg/I) (mg/I) (micromhos/ (ratio) CW53 712012009 ENER 202 697 1980

• 3990 6/15/2010 ENER 158 601 1630 *2435 3/1/2011 ENER 179 665 1700

• 2650 9/20/2012 ENER 185 716 1910

• 2185 11/14/2013 ENER 186 705 1860 4/15/2014 ENER 190 707 1860

• 2894 9/10/2014 ENER 197 727 1900

• 2847 5/12/2016 ENER 61.9 14.5 2.60 643 681 < 5.00 191 704 1940 2840 1.03 10/21/2016 ENER 52.0 12.1 2.30 640 680 < 5.00 189 661 1970 5258 1.04

• Signifies Specific Conductivity from HMC A-58 TABLE A.1-4 WATER QUALITY FOR THE SOUTH IRRIGATION SUPPLY WELLS Minor Constituents Sample Point pH Unat Mo Se N03 Ra226 Ra228 v Th230 Name Date Lab (std. units) (mg/I) (mg/I) (mg/I) (mg/I) (pCi/I) (pCi/I) (mg/I) (pCi/I) 0482 5/14/1979 EID 0.300 11/19/1980 HMC 6.53 0.800 10/14/1981 HMC 2.95 2.35 0.440 4.20 0.600 3/1/1982 HMC 3.31 1.73 0.490 2.60 1.90 3/22/1982 EIO 2.59 1.47 . 0.245 2.10 3/22/1982 HMC 7.65 3.10 1.28 0.220 2.40 0.900 1/20/1983 HMC 0.640 0.0800 3.40 9/6/1983 HMC 8.00 1.33 0.460 0.120 1.80 0.200 0.0100 10/27/1983 HMC 7.40 1.53 0.460 0.0900 2.20 11/10/1994 ENER 7.71 0.221 0.100 0.0240 1.79 < 0.200 2.10 < 0.0100 < 0.200 4/11/1996 ENER 8.04 0.252 < 0.0300 0.0180 1.78 < 0.200 < 1.000 < 0.0100 < 0.200 7/25/2002 ENER 0.297 0.0800 0.0230 9/4/2003 ENER 7.96 0.282 0.0800 0.0200 2.00 0.500 12/12/2003 ENER 0.326 0.0800 0.0200 5tiSt2005 ENER 0.168 0.0600 0.0230 2.40 9/21/2005 ENER 7.37 0.180 0.0660 0.0250 2.30 < 1.000 < 1.000 0.0040 < 1.000 10/11/2006 ENER 0.236 0.0600 0.0300 2.40 61412007 ENER 0.150 0.0600 0.0230 2.40 6/23/2008 ENER 0.144 0.0500 0.0260 2.80 10/1/2008 ENER 0.121 0.0400 0.0280 3.20 6/23/2009 ENER 0.124 0.0500 0.0240 2.60 5/26/2010 ENER 0.139 0.0600 0.0200 1.80 8/30/2010 ENER 0.135 0.190 0.0230 1.90 11/3/2011 ENER 0.180 0.0700 0.0350 1.80 9/24/2012 ENER 0.129 0.0500 0.0240 2.40 7/9/2013 ENER 0.144 0.0600 0.0240 1.90 5/14/2014 ENER 7.31 0.145 0.0600 0.0210 1.80 0.140 1.30 < 0.0100 0.0080 0483 4/13/1978 EID 1.22 7/13/1978 EID 0.870 A-59 -------------------

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* ---------TABLE A.1-4 WATER QUALITY FOR THE SOUTH IRRIGATION SUPPLY WELLS {cont'd.)

Minor Constituents Sample Point pH Unat Mo Se N03 Ra226 Ra228 v Th230 Name Date Lab (std. units) (mg/I) (mg/I) (mg/I) (mg/I) (pCi/I) (pCi/I) (mg/I) (pCi/I) 0483 8/8/1978 EID 1.58 0.570 9/5/1978 EID 1.40 9/17/1979 EID 4.58 9/19/1979 EID 7.35 2.60 0.0800 1.60 12/10/1979 EID 7.71 12.3 3.80 0.852 3.47 3/19/1980 EID 6.29 11.4 2.86 1.08 4.65 8/7/1980 EID 7.44 11.3 4.93 1.28 7/13/1981 HMC 7.40 7.59 2.81 1.18 5.30 0.800 9/9/1981 HMC 7.50 6.53 2.63 0.750 4.50 0.400 10/14/1981 HMC 6.36 2.63 0.590 4.20 1.40 2/24/1982 HMC 7.60 2.90 2.46 0.550 2.60 0.500 3/1/1982 HMC 3.31 1.73 0.490 2.60 1.90 3/22/1982 HMC 7.50

• 3.62 1.67 0.340 2.70 1.10 12/6/1982 HMC 7.40 2.32 0.830 0.150 4.00 9/6/1983 HMC 6.91 1.39 0.620 0.0700 1.37 0.900 0.0100 7/24/1996 ENER 8:01 0.219 0.0800 0.0360 1.10 < 0.200 8/9/2005 ENER 0.176 0.0600 0.0310 2.30 9/20/2005 ENER 7.43 0.184 0.0700 0.0290 2.50 < 1.000 < 1.000 0.0040 < 1.000 10/1112006 ENER 0.210 0.0800 0.0300 2.20 6/4/2007 ENER 0.193 0.0700 0.0270 2.40 6/2/2008 ENER ---0.167 0.0600 0.0300 2:80 10/1/2008 ENER 0.130 0.0500 0.0350 3.20 7/20/2009 ENER 0.186 0.0600 0.0320 2.70 10/6/2009 ENER 0.148 0.0500 0.0310 3.30 6/15/2010 ENER 0.134 0.0600 0.0200 1.70 8/30/2010 ENER 0.136 0.0800 0.0240 1.70 1117/2011 ENER 0.140 0.0600 0.0340 1.70 9/24/2012 ENER 0.134 0.0500 0.0270 2.70 11/14/2013 ENE;R 0.143 0.0400 0.111 12.0

• Signifies Specific Conductivity from HMC A -60 TABLE A.1-4 WATER QUALITY FOR THE SOUTH IRRIGATION SUPPLY WELLS (cont'd.)

Minor Constituents Sample Point pH Unat Mo Se N03 Ra226 Ra228 v Th230 Name Date Lab (std. units) (mg/I) (mg/I) (mg/I) (mg/I) (pCi/I) (pCi/I) (mg/I) (pCi/I) . 0483 6/11/2014 ENER ---0.134 0.0500 0.0280 9/10/2014 ENER ---0.115 0.0500 0.0240 5/12/2016 ENER 7.40 0.205 0.0500 0.0330 1.90 0.360 0.400 < 0.0100 0.0200 0490 12130/1981 HMC 8.00 2.34 0.100 0.260 6.80 0.800 12/30/1981 HMC 8.00 2.43 0.120 0.270 7.20 0.800 2/5/1982 HMC ---3.52 1.97 0.470 3.40 2/5/1982 HMC ---3.10 2.12 3.65 3.70 0.800 2/5/1982 HMC ---3.20 1.91 0.390 3.50 0.800 3/22/1982 HMC 7.50 4.62 1.93 0.270 4.10 2.00 5/27/1982 HMC 7.60 3.27 1.03 0.320 3.70 12/30/1982 HMC 7.40 2.48 0.940 0.130 3.50 2/11/1983 HMC 7.70 2.28 1.80 0.0600 3.00 0.800 4/27/1983 HMC 7.90 2.18 1.18 0.0700 3.70 6/27/1983 HMC 7.20 2.06 1.20 0.0700

• 1.48 0.900 9/2/1983 HMC 7.70 1.95 1.06 0.0600 2.80 10/6/1983 HMC 7.50 1.85 1.05 0.0600 2.50 1/6/1984 HMC 7.20 1.66 0.960 0.0700 2.80 1.30 4/10/1984 HMC 7.60 1.85 1.18 0.130 7.50 6/14/1984 HMC 7.20 1.72 1.06 0.0900 13.6 10/23/1984 HMC 7.20 1.42 0.740 0.0800 13.1 1/30/1985 HMC 7.40 1.38 0.680 0.0600 2.90 1.10 4/2/1985 HMC

• 7.10 1.35 0.620 0.0600 4.00 7/8/1985 HMC 7.00 1.26 0.500 0.0200 5.40 10/14/1985 HMC 7.40 1.09 0.450 0.0600 5.80 1/14/1986 HMC 7.10 0.899 0.410 0.0600 3.70 0.400 4/9/1986 HMC 7.70 0.907 0.380 0.0500 6.60 7/14/1986 HMC 7.30 0.755 0.340 0.0200 6.30 10/21/1986 HMC 7.50 0.729 0.350 0.0100 3.20 10/21/1986 HMC 7.60 0.746 0.320 0.0100 5.70 1.70 **Signifies Specific Conductivity from HMC A-61 -------------------

--*-----------------

TABLE A.1-4 WATER QUALITY FOR THE SOUTH IRRIGATION SUPPLY WELLS (cont'd.)

Minor Constituents Sample Point pH Unat Mo Se N03 Ra226 Ra228 v Th230 Name Date Lab (std. units) (mg/I) (mg/I) (mg/I) (mg/I) (pCi/I) (pCi/I) (mg/I) (pCi/I) 0490 10/16/1997 ENER 0.297 0.0220 3/10/1998 ENER 7.80 0.357 0.140 0.0410 1.65 < 0.200 3/10/1998 ENER # 7.95 # 0.339 # 0.140 # 0.0400 # 1.57 # < 0.200 10/6/1998 ENER 0.376 0.0310 3/3/1999 ENER 7.82 0.325 0.140 0.0190 1.70 < 0.200 10/13/1999 ENER 0.287 0.0270 3/8/2000 ENER 8.00 0.263 0.120 0.0100 1.51 0.500 3/8/2000 ENER # 7.91 # 0.306 # 0.130 # 0.0050 # 1.83 # < 0.200 10/18/2000 ENER 0.228 0.0300 10/18/2000 ENER # 0.229 # 0.0276 6/5/2001 ENER 0.245 0.109 0.0270 6/11/2002 ENER 0.254 0.120 0.0310 6/4/2003 ENER 7.36 0.288 0.110 0.0320 2.00 < 0.200 < 1.000 < 0.0100 0.300 6/4/2003 ENER # 7.44 # 0.278 # 0.100 # 0.0320 # 2.00 # < 0.200 # 2.70 # < 0.0100 # 0.300 5/20/2004 ENER 7.67 0.324 0.120 0.0250 1.78 < 0.200 < 1.000 < 0.0100 < 0.200 5/25/2005 ENER 7.59 0.186 0.0800 0.0260 2.70 < 0.200 1.000 < 0.0100 < 0.200 9/19/2005 ENER # 7.64 # 0.227 # 0.0820 # 0.0290 # 2.80 # < 1.000 # < 1.000 # 0.0030 # < 1.000 9/19/2005 ENER 7.50 0.230 0.0810 0.0290 2.80 < 1.000 < 1.000 0.0030 < 1.000 5/18/2006 ENER 8.40 0.229 0.0900 0.0320 2.40 < 0.200 < 1.000 < 0.0100 < 0.200 .6/19/2006 ENER 7.42 0.262 0.0800 0.0330 2.60 < 0.200 < 1.000 < 0.0100 < 0.200 6/19/2006 ENER # 7.72 # 0.215 # 0.0900 # 0.0350 # 2.60 # < 0.200 # < 1.000 # < 0.0100 #< 0.200 10/11/2006 ENER 0.316 0.0700 0.0370 61412007 ENER 7.70 0.280 0.0790 0.0330 2.90 < 0.200 < 1.000 < 0.0100 < 0.200 10/1/2007 ENER 0.238 0.0700 0.0590 10/1/2007 ENER # 0.233 # 0.0800 # 0.0590 6/2/2008 ENER 7.60 0.337 0.0800 0.0400 4.20 0.100 -0.100 < 0.0100 0.100 6/2/2008 ENER . # 7.54 # 0.329 # 0.0800 # 0.0390 # 4.00 #. 0.0700 # 0.0200 # < 0.0100 # 0 10/1/2008 ENER 0.287 0.0700 0.0420 6/1/2009 ENER 7.21 0.148 0.0600 0.0220 2.10 0.250 0.400 < 0.0100 0.0600 # Signifies Quality Control Sample A-63 -*------------------

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TABLE A.1-4 WATER QUALITY FOR THE SOUTH IRRIGATION SUPPLY WELLS (cont'd.)

Minor Constituents Sample Point pH Unat Mo Se N03 Ra226 Ra228 v Th230 Name Date Lab (std. units) (mg/I) (mg/I) (mg/I) (mg/I) (pCi/I) (pCi/I) (mg/I) (pCi/I) 0490 9/14/2009 EPA6 # 0.0068 # 0.356 # 0.0787 # 0.0560

• 3.50 *< 0.130 *< 0.220 # < 0.0100 *< -0.0430 9/14/2009 ENER 0.316 0.0800 0.0400 6/15/2010 ENER 7.65 0.250 0.100 0.0310 1.90 0.0400 0.300 < 0.0100 -0.0400 8/30/2010 ENER 0.267 0.0900 0.0330 2.00 10/27/2010 ENER 0.273 0.0700 0.0380 6/8/2011 ENER 7.87 0.199 0.0600 0.0320 2.20 0.200 0.500 < 0.0100 0.0700 10/11/2011 ENER 0.211 0.0600 0.0320 6/13/2012 ENER 7.52 0.220 0.0600 0.0340 2.30 -0.0200 0.300 < 0.100 0.0500 10/3/2012 ENER 0.209 0.0700 0.0560 11/4/2013 ENER 0.0932 0.0400 0.110 11/22/2013 ENER 0.225 0.130 0.0370 6/11/2014 ENER 0.223 0.0600 0.0490 5/21/2015 ENER 7.46 0.129 < 0.0300 0.0470 4.20 0.100 0.600 < 0.0100 0.0600 10/15/2015 ENER 0.0718 < 0.0300 0.0290 5/12/2016 ENER 7.34 0.0848 0.0700 0.0330 2.40 0.220 0.200 < 0.0100 0.0080 10/21/2016 ENER 7.60 0.254 < 0.0400 0.0330 2.20 0.0500 0.400 < 0.0100 0.0300 3/9/2017 ENER 0.493 < 0.0300 0.0350 0491 12/30/1981 HMC 7.90 3.88 2.03 0.450 3.50 1.80 12/30/1981 HMC 8.00 3.99 2.00 0.420 3.50 1.80 12/30/1981 HMC 7.90 4.03 0.890 0.460 3.70 0.500 3/22/1982 HMC 7.55 3.10 0.220 0.180 5.30 1.10 10/25/1983 HMC 7.40 2.54 0.290 0.350 6.00 4/3/1990 HMC 0.577 0.0200 11/10/1994 ENER 7.79 0.955 0.170 0.0320 1.41 < 0.200 < 1.000 < 0.0100 < 0.200 3/25/1996 ENER 7.88 1.45 0.110 0.0720 3.29 0.500 < 1.000 < 0.0100 < 0.200 12/4/1996 ENER 7.85 0.735 0.100 0.106 6.89 < 0.200 < 1.000 < 0.0100 < 0.200 3/25/1997 ENER 0.791 < 0.100 0.108 8/27/1997 ENER 7.88 0.918 0.0800 0.0900 5.58 < 0.200 3/26/1998 ENER 1.58 0.270 0.0520 # Signifies Quality Control Sample

• Signifies Specific Conductivity from HMC A-64 TABLE A.1-4 WATER QUALITY FOR THE SOUTH IRRIGATION SUPPLY WELLS (cont'd.)

Minor Constituents Sample Point pH Unat Mo Se N03 Ra226 Ra228 v Th230 Name Date Lab (std. units) (mg/I) (mg/I) (mg/I) (mg/I). (pCi/I) (pCi/I) (mg/I) (pCi/I) 0491 8/24/1998 ENER 7.93 1.000 0.130 0.190 1.59 0.500 8/22/2001 ENER 0.660 0.0600 0.0960 712512002 ENER 0.898 0.0700 0.0680 9/4/2003 ENER 0.913 0.0700 0.0240 1.80 12/12/2003 ENER 0.966 0.0900 0.0150 8/23/2004 ENER 0.860 0.0800 0.0190 1.67 512512005 ENER 0.777 0.0800 0.0230 2.30 9/21/2005 ENER 7.52 0.725 0.0760 0.0220 2.10 < 1.000 < 1.000 0.0030 < 1.000 5/18/2006 ENER 8.38 0.601 0.0700 0.0270 2.30 < 0.200 < 1.000 < 0.0100 < 0.200 6/4/2007 ENER 0.522 0.0700 0.0320 2.20 6/4/2007 ENER # 0.508 # 0.0700 # 0.0320 # 2.30 6/23/2008 ENER 0.328 < 0.0300 0.173 12.5 10/1/2008 ENER 0.325 0.0500 0.0400 2.00 6/23/2009 ENER 0.318 0.0600 0.0380 1.60 10/712009 ENER 0.292 0.0500 0.0360 5/26/2010 ENER 0.258 0.0500 0.0310 1.50 8/30/2010 ENER 0.277 0.100 0.0280 1.60 6/13/2011 ENER 0.265 0.0500 0.0220 1.60 11/3/2011 ENER 0.230 0.0400 0.0220 9/24/2012 ENER 0.269 0.0500 0.0200 1.70 7/9/2013 ENER 0.291 0.0500 0.0230 1.80 5/14/2014 ENER 0.269 < 0.0300 0.233 13.0 9/18/2014 ENER 0.203 0.0900 0.210 18.0 9/18/2014 ENER # 0.198 # < 0.0300 # 0.208 # 16.0 0493 9/5/1984 HMC 7.60 < 0.0100 < 0.0100 < 0.0100 7.90 0.400 1/16/1985 HMC 8.00 < 0.0100 < 0.0100 0.0100 1.90 4/2/1985 HMC 7.90 < 0.0100 0.0200 0.0100 2.90 0.400 7/8/1985 HMC 7.40. < 0.0100 0.0200 0.0200 3.50 10/11/1985 HMC 8.00 < 0.0100 0.0100 0.0100 3.60 # Signifies Quality Control Sample A-65 -------------------

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TABLE A.1-4 WATER QUALITY FOR THE SOUTH IRRIGATION SUPPLY WELLS (cont'd.)

Minor Constituents Sample Point pH Unat Mo Se N03 Ra226 Ra228 v Th230 Name Date Lab (std. units) (mg/I) (mg/I) (mg/I) (mg/I) (pCi/I) (pCi/I) (mg/I) (pCi/I) 0493 1/14/1986 HMC 7.90 < 0.0100 0.0100 . 0.0400 3.50 4/9/1986 HMC 8.10 < 0.0100 0.0200 0.02QO 5.20 7/14/1986 HMC 8.00 0.305 0.0200 0.0200 7.60 0.300 10/20/1986 HMC 8.20 < 0.0100 0.0100 0.0100 6.30 10/20/1986 HMC 8.10 < 0.0100 0.0200 0.0100 6.30 1/28/1987 HMC 7.70 < 0.0100 0.0100 0.0400 4.70 4/14/1987 HMC 8.30 < 0.0100 0.0100 0.0300 1.80 7/16/1987 HMC 7.20 0.0848 0.0100 0:0400 3.60 0.300 10/20/1987 HMC 8.10 < 0.0100 0.0200 0.0400 2.50 11/19/1987 EID 0.0090 < 0.0100 0.0410 < 0.100 11/19/1987 HMC 7.90 < 0.0100 0.0100 0.0500 2.40 0.200 2/9/1988 HMC 8.00 < 0.0100 0.0100 O.OqOO 1.90 4/27/1988 HMC 8.10 < 0.0100 0.0200 0.0500 1.000 7/20/1988 HMC 8.00 0.0339 0.0200 0.0300 1.10 0.0200 10/27/1988 HMC 8.80 0.0254 0.0300 0.0600 1.000 1/19/1989 HMC 8.60 0.0678 0.0100 0.0600 1.000 6/15/1989 HMC 8.30 0.0424 0.0200 0.0100 0.700 8/31/1989 HMC 8.60 0.0170 < 0.0100 0.0100 0.800 0.100 < 0.0100 *O 4/4/1990 HMC 0.0170 0.0300 10/22/1990 HMC 7.80 0.0678 0.0100 0.0600 4.20

• 0.100 4/30/1991 HMC 0.059:4 0.0600 10/10/1991 HMC 8.00 0.0254 0.0100 0.0600 4.20 10/10/1991 BARR 7.69 0.0135 0.0200 0.0500. 1.10 0.200 4/13/1992 HMC 0.0254 0.120 4/30/1992 HMC 0.0254 0.110 11/2/1992 HMC 7.80 0.0254 0.0100 0.0900 4.80

• 1.50 3/8l1993 HMC 8.20 0.0148 0.0100 0.110 5.60 *< 0.200 3/15/1994 ENER 8.12 0.0180 0.100 0.0660 1.43 < 0.200 < 1.000 < 0.0100 < 0.200 9/29/1994 HMC 0.129

• Signifies Specific Conductivity from HMC A-66 TABLE A.1-4 WATER QUALITY FOR THE SOUTH IRRIGATION SUPPLY WELLS (cont'd.)

Minor Constituents Sample Point pH Unat Mo Se N03 Ra226 Ra228 v Th230 Name Date Lab (std. units) (mg/I) (mg/I) (mg/I) (mg/I) (pCi/I) (pCi/I) (mg/I) (pCi/I) 0493 9/29/1994 ENER 0.0210 0.168 11/14/1994 ENER 8.25 0.0190 < 0.0300 0.0530 1.26 < 0.200 < 1.000 < 0.0100 < 0.200 11/21/1994 ENER 8.27 0.0260 < 0.0300 0.172 1.28 0.400 3.00 < 0.0100 < 0.200 3/28/1995 ENER 8.47 0.0220 < 0.0300 0.111 1.41 < 0.200 10/16/1995 ENER 0.0220 0.102 3/13/1996 ENER 8.48 0.291 < 0.0300 0.155 1.67 < 0.200 10/14/1996 ENER 0.0276 .< 0.0300 0.136 1.6() ---3/17/1997 EN!:OR 8.25 0.0270 < 0.0300 0.144 1.49" < 0.200 4/15/1997 ENER 8.29 0.0340 0.0300 0.180 1.58 < 0.200 10/16/1997 ENER 0.0280 0.0880 3/10/1998 ENER 8:29 0.0420 < 0.0300 0.210 1.70 1.10 10/6/1998 ENER 0.0630 0.225 3/3/1999 ENER 8.43 0.0562 < 0.0300 0.231 1.77 < 0.200 10/13/1999 ENER 0.0552 0.261 10/13/1999 ENER # 0.0560 # 0.240 3/8/2000 ENER 8.16 0.0436 < 0.0300 0.179 1.68 0.200 10/18/2000 ENER 0.0307 0.148 3/13/2001 ENER 0.0500 < 0.0300 0.200 6/5/2001 ENER 0.0430 0.0500 0.178 3/27/2002 ENER 0.0560 < 0.0300 0.189 6/11/2002 ENER 0.0530 < 0.0300 0.169 3/20/2003 ENER 0.108 < 0.0300 0.229 3/20/2003 ENER # 0.106 # < 0.0300 # 0.216 6/4/2003 ENER 8.32 0.0929 < 0.0300 0.222 1.80 < 0.200 < 1.000 < 0.0100 0.300 3/11/2004 ENER 0.133 < 0.0300 0.190 3/11/2004 ENER # 0.126 # < 0.0300 # 0.184 5/20/2004 ENER 8.27 0.151 < 0.0300 0.196 1.86 < 0.200 < 1.000 < 0.0100 < 0.200 2/8/2005 ENER 0.185 < 0.0300 0.153 . 5/25/2005 ENER 8.07 0.159 < 0.0300 0.166 2.10 < 0.200 < 1.000 < 0.0100 < 0.200 # Signifies Quality Control Sample A-67 -------------------

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TABLE A.1-4 WATER QUALITY FOR THE SOUTH IRRIGATION SUPPLY WELLS (cont'd.)

Minor Constituents Sample Point pH Unat Mo Se N03 Ra226 Ra228 v Th230 Name Date Lab (std. units) (mg/I) (mg/I) (mg/I) (mg/I) (pCi/I) (pCi/I) (mg/I) (pCi/I) 0493 5/25/2005 ENER # 8.08 # 0.162 # < 0.0300 # 0.168 # 2.10 # < 0.200 # < 1.000 # < 0.0100 . # < 0.200 9/19/2005 ENER 8.55 0.158 0.0040 0.171 2.00 < 1.000 < 1.000 0.0040 < 1.000 2/13/2006 ENER 0.216 < 0.0300 0.188 2/13/2006 ENER # 0.216 # < 0.0300 # 0.184 6/19/2006 ENER 8.25 0;195 < 0.0300 0.176 2.00 < 0.200 < 1.000 < 0.0100 < 0.200 2/5/2007 ENER 0.250 < 0.0300 0.167 5/10/2007 ENER 8.25 . 0.225 < 0.0300 0.162 2.00 2.00 < 1.000 < 0.0100 < 0.200 2/5/2008 ENER 0.292 < 0.0300 0.134 6/23/2008 ENER 7.89 0.271 < 0.0300 0.135 2.00 0.100 0.100 < 0.0100 0 10/1/2008 ENER 0.170 < 0.0300 0.133 7/20/2009 ENER 8.00 0.242 < 0.0300 0.132 2.20. -0.0020 0.300 < 0.0100 0.0500 9/14/2009 ENER 8.15 0.230 < 0.0300 0.131

• 2.10 *< -0.0340 *< 0.130 < 0.0100 *< 0.0380 9/14/2009 EPA6 # 0.0080 # 0.268 # < 0.0500 # 0.172 # < 0.0100 2/8/2010 ENER 0,321 < 0.0300 0.109 6/15/2010 ENER 8.01 0.397 < 0.0300 0.112 2.10 -0.0300 0.400 < 0.0100 0.0200 10/27/2010 ENER 0.250 < 0.0300 0.125 2/7/2011 ENER 0.302 < 0.0300 0.110 2/7/2011 ENER # 0.295 # < 0.0300 # 0.111 6/8/2011 ENER. 8.24 0.332 < 0.0300 0.117 2.20 0.210 0.300 < 0.0100 0.0300 3/6/2012 ENER 0.171 0.0500 0.0310 6/13/2012 ENER 7.95 0.330 < 0.0300 0.104 2.10 0.0300 -0.100 < 0.100 -0.0040 9/20/2012 ENER 0.290 < 0.0300 0.121 2/8/2013 HMC 0.308 < 0.0300 0.119 . 7/8/2013 ENER 8.26 0.309 < 0.0300 0.0970 2.20 0.770 -0.300 < 0.0100 . 0.300 2/12/2014 ENER 0.383 < 0.0300 0.100 2/12/2014 ENER # 0.383 # < 0.0300 # 0.0980 6/16/2014 ENER 8.25 0.290 < 0.0300 0.200 2.10 0.150 -0.0500 < 0.0100 0.200 3/4/2015 ENER < 0.0003 < 0.0300 0.117 3/4/2015 ENER # 0.188 # < 0.0300 # 0.117 #Signifies Quality Control Sample

• Signifies Specific Conductivity from HMC A-68 TABLE A.1-4 WATER.QUALITY FOR THE SOUTH IRRIGATION SUPPLY WELLS (cont'd.)

Minor Constituents

'-Sample Point pH Unat Mo Se N03 Ra226 Ra228 v Th230 Name Date Lab (std. units) (mg/I) (mg/I) (mg/I) (mg/I) (pCi/I) (pCi/I) (mg/I) (pCi/I) 0493 5/21/2015 ENER 7.88 0.142 < 0.0300 0.110 2.20 -0.0200 1.10 < 0.0100 0.0040 2/15/2016 ENER 0.189 < 0.0300 0.115 7/11/2016 ENER 8.30 0.277 < 0.0300 0.103 2.10 0.340 4.60 < 0.0100 0.0020 311/2017 ENER 0.158 < 0.0300 0.105 0496 2/5/1997 ENER 7.90 0.900 0.0600 0.168 2.08 1.30 < 1.000 < 0.0100 < 0.200 4/22/1997 ENER 7.95 0.954 < 0.0300 0.103 1.57 < 0.200 8/18/1997 ENER 0.828 < 0.0300 0.141 4/13/1998 ENER 7.86 0.805 < 0.0300 0.137 1.63 0.200 8/10/1998 ENER 0.814 < 0.0300 0.107 8/31/1999 ENER 0.780 0.0960 8/22/2000 ENER 0.904 0.137 8/22/2000 ENER # 0.893 # 0.121 8/20/2001 ENER 0.520 0.0750 8/20/2001 ENER # 0.520 # 0.0800 8/12/2002 ENER 0.433 0.0920 8/12/2002 ENER # 0.435 # 0.0930 8/21/2003 ENER 0.326 < 0.0300 0.0650 1.70 8/17/2004 ENER 0.173 0.0630 1.87 3/28/2005 ENER 0.113 < 0.0300 0.0640 1.80 9/26/2005 ENER 0.0960 < 0.0300 0.0770 1.80 3/15/2006 ENER 0.0985 < 0.0300 0.102 1.70 3/26/2007 ENER 0.0606 < 0.0300 0.0800 1.80 9/11/2007 ENER 0.0940 < 0.0300 0.0760 1.70 3/31/2008 ENER 0.0629 < 0.0300 0.0610 2.36 3/23/2009 ENER 0.124 0.0600 0.0200 2:28 8/12/2009 ENER 0.101 < 0.0300 0.0390 1.90 10/6/2010 ENER 0.128 < 0.0300 0.0520 1:80 ---10/27/2010 ENER 0.139 < 0.0300 0.0490 4/18/2011 ENER 0.104 < 0.0300 0.0460 # Signifies Quality Control Sample A-69 -------------------

I --------------------TABLE A.1-4 WATER QUALITY FOR THE SOUTH IRRIGATION SUPPLY WELLS (cont'd.)

Minor Constituents Sample Point pH Unat Mo Se N03 Ra226 Ra228 v Th230 Name Date Lab (std. units) (mg/I) (mg/I) (mg/I) (mg/I) (pCUI) (pCi/I) (mg/I) (pCi/I) 0496 10/19/2011 ENER 0.123 < 0.0300 0.0500 1.90 5/7/2012 ENER 0.128 < 0.0300 0.0460 9/20/2012 ENER 0.168 < 0.0300 0.0380 2.10 3/6/2013 ENER 0.156 < 0.0300 0.0360 11/14/2013 ENER 0.117 < 0.0300 0.0370 2.20 4/1/2014 ENER 0.125 < 0.0300 0.0320 0497 212711991 ENER 7.60 1.49 < 0.0300 0.0600 1.52 < 0.200 < 1.000 < 0.0100 < 0.200 4/22/1997 ENER 7.95 1.34 < 0.0300 0.0380 1.30 < 0.200 8/18/1997 ENER 1.17 < 0.0300 0.0490 4/13/1998 ENER 7.99 1.15 < d.0300 0.0560 1.60 < 0.200 8/10/1998 ENER 1.21 < 0.0300 0.0470 8/31/1999 ENER 1.22 0.0560 8/15/2000 ENER 0.892 0.0690 8/20/2001 ENER 0.860 0.0590 8/12/2002 ENER 0.907 0.0670 8/25/2003 ENER 1.25 < 0.0300 0.0660 1.90 8/17/2004 ENER 1.46 < 0.0300 0.0480 1.76 11/8/2004 ENER* 1.35 < 0.0300 0.0430 2/2/2005 ENER ---1.37 < 0.0300 0.0420 9/26/2005 ENER 1.33 < 0.0300 0.0450 1.90 1/10/2006 ENER 1.26 < 0.0300 0.0410 8/14/2006 ENER 1,04 < 0.0300 0.0420 1.80 9/11/2007 ENER 1.05 < 0.0300 0.0370 1.90 10/1/2008 ENER 0.911 < 0.0300 0.0330 2.20 7/20/2009 ENER 0.988 < 0.0300 0.0360 2.30 5/26/2010 ENER 1.10 < 0.0300 0.0390 2.20 10/19/2011 ENER 0.814. < 0.0300 0.0350 . 2.10 10/9/2012 ENER 0.773 < 0.0300 0.0390 2.30 11/7/2012 ENER 7.73 0.750 0.0500 0.0380 2.40 0.240 A-70 TABLE A.1-4 WATER QUALITY FOR THE SOUTH IRRIGATION SUPPLY WELLS (cont'd.)

Minor Constituents Sample Point pH Unat Mo Se *N03 Ra226 Ra228 v Th230 Name Date Lab (std. units) (mg/I) (mg/I) (mg/I) (mg/I) * (pCi/I) (pCi/I) (mg/I) (pCi/I) 0497 6/17/2013 ENER 0.893 0.0300 0.0340 2.20 11/14/2013 ENER 0.859 < 0.0300 0.0370 5.20 4/1/2014 ENER 0.749 < 0.0300 0.0440 6/11/2014 ENER 0.833 < 0.0300 0.0450 7/10/2014 ENER 0.766 < 0.0300 0.0430 11/13/2014 ENER 0.800 < 0.0300 0.0440 12/23/2014 ENER 0.805 < 0.0300 0.0450 3/4/2016 ENER 7.29 0.596 < 0.0300 0.0550 3.00 0.190 1.000 < 0.0100 0.0800 3/17/2017 ENER 7.35 0.530 < 0.0300 0.0410 2.90 0.0001 0.0005 < 0.0100 0.0000 0498 1/19/2004 ENER 7.87 0.714 < 0.0300 0.0750 1.68 < 0.200 < 1.000 < 0.0100 < 0.200 9/13/2004 ENER 0.824 < 0.0300 0.0680 9/26/2005 ENER 0.660 < 0.0300 b.0710 1.80 8/14/2006 ENER o.474 < 0.0300 0.0810 1.60 6/4/2007 ENER 0.193 0.0500 0.0410 2.20 6/23/2008 ENER 0.420 < 0.0300 0.0630 2.20 10/112008 ENER 0.236 < 0.0300 0.0580 1.80 6/.15/2009 ENER 0.339 < 0.0300 0.0460 1.80 5/26/2010 ENER 0.275 < 0.0300 *0.0420 1.80 6/13/2011 ENER 0.394 < 0.0300 0.0390 1.90 7/9/2012 ENER 0.392 < 0.0300 0.0370 2.00 11/14/2013 ENER 0.504 < 0.0300 0.0390 1.90 6/11/2014 ENER 0.521 < 0.0300 0.0400 6/9/2015 ENER 0.205 < 0.0300 0.0520 1.80 7/5/2016 ENER 7.56 0.353 < 0.0300 0.0300 1.90 0.570 0.400 < 0.0100 0.100 0538 1/19/2004 ENER 7.95 . 0.906 < 0.0300 0.129 2.34 < 0.200 < 1.000 < 0.0100 < 0.200 9/13/2004 ENER 0.538 < 0.0300 0.157 2/7/2005 ENER 0.664 . 0.0840 3.70 12/11/2006 ENER 0.302 0.0500 4.90 A-71 -------------------

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*-------TABLE A.1-4 WATER QUALITY FOR THE SOUTH IRRIGATION SUPPLY WELLS (cont'd.)

Minor Constituents Sample Point pH Unat Mo Se N03 Ra226 Ra228 v Th230 Name Date Lab (std. units) (mg/I) (mg/I) (mg/I) (mg/I) (pCi/I) (pCi/I) (mg/I) (pCi/I) 0538 4/30/2007 ENER 0.324 0.0730 4.30 3/31/2008 ENER 0.222 0.0430 4.20 6/15/2009 ENER 0.205 0.0400 4.00 5/25/2010 ENER 0.141 0.0320 4.10 8/28/2010 ENER 0.142 < 0.0300 0.0300 3.80 4/18/2011 ENER 0.163 0.0350 4.20 5/9/2012 ENER 0.187 0.0390 3.90 9/20/2012 ENER 0.188 < 0.0300 0.0330 3/18/2013 HMC 0.174 0.0220 4.00 4/1/2014 ENER 0.211 0.0270 3.90 7/18/2014 ENER 0.223 < 0.0300 0.0270 8/9/2016 ENER 0.203 < 0.0300 0.0260 0540 1/20/2004 ENER 8.00 1.09 < 0.0300 0.129 1.82 0.400 < 1.000 < 0.0100 < 0.200 9/13/2004 ENER 0.756 < 0.0300 0.0720 9/27/2005 ENER 0.543 < 0.0300 0.0800 3.60 9/12/2007 ENER 0.586 < 0.0300 0.0670 3.70 10/1/2008 ENER 0.398 < 0.0300 0.0470 4.70 9/11/2009 ENER 0.305 < 0.0300 0.0450 4.10 3/1/2010 ENER 7.41 0.303 < 0.0300 0.0350 3.50 5/25/2010 ENER 0.346 < 0.0300 0.0360 3.60 8/28/2010 ENER 0.263 < 0.0300 0.0340 2.90 10/19/2011 ENER 0.321 < 0.0300 0.0420 3.40 9/20/2012 ENER 0.504 < 0.0300 0.0340 3.10 5/3/2013 ENER 0.480 < 0.0300 0.0370 11/14/2013 ENER 0.486 < 0.0300 0.0350 2.90 10/3/2014 ENER 0.111 < 0.0300 0.0250 . 0.100 5/14/2015 ENER 0.0515 0.0300 0.0290 4/28/2016 ENER 7.63 0.0231 < 0.0300 0.0070 1.20 0.230 1.40 < 0.0100 0.0200 8/4/2016 ENER 0.144 < 0.0300 0.0300 A-72 Sample Point Name 0541 0631 --TABLE A.1-4 WATER QUALITY FOR THE SOUTH IRRIGATION SUPPLY WELLS (cont'd.)

Minor Constituents Date Lab 2/9/2004 ENER 9/13/2004 ENER 9/26/2005 ENER 8/30/2006 ENER 8/22/2007 ENER 10/2/2008 ENER 7/21/2009 ENER 4/20/2010 ENER 6/15/2010 ENER 10/27/2010 ENER 9/20/2012 ENER 8/8/2013 ENER 7/21/2015 ENER 12/28/2016 ENER 3/30/1999 ENER 3/31/1999 ENER 10/28/1999 ENER 9/6/2000 ENER 5/4/2001 ENER 9/17/2001 ENER 5/8/2002 ENER 10/2/2002 ENER 5/27/2003 ENER 9/18/2003 ENER 5/13/2004 ENER 9/14/2004 ENER 3/28/2005 ENER 9/26/2005 ENER --pH (std. units) 7.18 7.90 7.93 -Unat (mg/I) 0.0619 0.0550 0.0732 0.0759 0.0787 0.0748 0.0926 0.180 0.207 0.142 0.116 0.0975 0.0963 0.0946 0.0233 0.0228 0.0284 0.0300 0.0280 0.0260 0.0240 0.0390 0.0313 0.0280 0.0290 0.0253 0.0265 0.0270 -Mo (mg/I) < 0.0300 < 0.0300 < 0.0300 < 0.0300 < 0.0300 < 0.0300 < 0.0300 < 0.0300 < 0.0300 < 0.0300 < 0.0300 < 0.0300 < 0.0300 . < 0.0300 < 0.0300 < 0.0300 0.650 < 0.0300 < 0.0300 < 0.0300 < 0.0300 --Se (mg/I) 0.0140 0.0320 0.0390 0.0310 0.0300 0.0290 0.0340 0.0450 0.0420 0.0340 0.0300 0.0260 0.0220 0.0270 0.282 0.265 0.250 0.190 0.223 0.229 0.211 0.194 0.178 0.207 0.213 0.202 0.214 0.234 -N03 (mg/I) 2.90 4.60 4.10 4.30 4.30 4.80 5.20 5.40 4.70 4.20 4.20 2.17 2.02 2.20 2.20 2.01 2.40 A-73 -Ra226 (pCi/I) 0.700 < 0.200 < 0.200 --Ra228 (pCi/I) < 1.000 < 1.000 1.10 -v (mg/I) < 0.0100 < 0.0100 < 0.0100 -Th230 (pCi/I) 0.500 0.600 1.10 -----

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TABLE A.1-4 WATER QUALITY FOR THE SOUTH IRRIGATION SUPPLY WELLS (cont'd.)

Minor Constituents Sample Point pH Unat Mo Se N03 Ra226 Ra228 v Th230 Name Date Lab (std. units) (mg/I) (mg/I) (mg/I) (mg/I) (pCi/I) (pCi/I) (mg/I) (pCi/I) 0631 3/15/2006 ENER 0.103 . < 0.0300 0.143 10/10/2006 ENER 0.0369 < 0.0300 0.236 2.70 5/1/2007 ENER 0.0342 < 0.0300 0.203 9/12/2007 ENER 0.0390 < 0.0300 0.196 3.10 3/31/2008 ENER 0.0779 < 0.0300 0.162 6/16/2009 ENER 0.0467 < 0.0300 0.139 7/21/2009 ENER 0.0500 < 0.0300 0.145 4.10 4/21/2010 ENER 0.0680 < 0.0300 0.115 8/28/2010 ENER 0.0687 < 0.0300 0.0980 4.00 4/18/2011 ENER 0.0932 < 0.0300 0.0920 5/9/2012 ENER 0.0875 < 0.0300 0.0780 9/20/2012 ENER 0.101 < 0.0300 0.0860 4.10 11nt2012 ENER 7.69 0.104 < 0.0300 0.0850 3.70 0.0300 3/6/2013 ENER 0.0908 < 0.0300 0.0790 4/1/2014 ENER -. 0.117 < 0.0300 0.0710 12/27/2016 ENER 0.154 < 0.0300 0.0460 0632 3/25/1999 ENER 7.66 0.0236 < 0.0300 0.330 2.48 0.200 < 1.000 < 0.0100 < 0.200 3/26/1999 ENER 7.73 0.0237 < 0.0300 0.327 2.48 < 0.200 < 1.000 < 0.0100 < 0.200 10/28/1999 ENER 0.0229 0.331 9/6/2000 ENER 0.0250 0.229 9/17/2001 ENER 0.0220 0.277 10/2/2002 ENER 0.0260 0.248 9/18/2003 ENER 0.0289 < 0.0300 0.281 2.70 9/14/2004 ENER 7.35 0.0299 < 0.0300 0.267 2.47 0.400 < 1.000 < 0.0100 < 0.200 2/3/2005 ENER 7.47 0.0328 < 0.0300 0.275 2.90 < 0.200 2.00. < 0.0100 < 0.200 5/1/2007 ENER 0.0322 < 0.0300 0.253 3.00 9/12/2007 ENER 0.0312 < 0.0300 0.247 2.90 3/31/2008 ENER 0.0348 < 0.0300 0.212 3.00 6/23/2009 ENER 0.0411 < 0.0300 0.198 3.50 A-74 TABLE A.1-4 WATER QUALITY FOR THE SOUTH IRRIGATION SUPPLY WELLS (cont'd.)

Minor Constituents Sample Point pH Unat Mo Se N03 Ra226 Ra228 v Th230 Name Date Lab (std. units) (mg/I) (mg/I) (mg/I) (mg/I) (pCi/I) (pCi/I) (mg/I) (pCi/I) 0632 7/21/2009 ENER 0.0456 < 0.0300 0.186 3.30 4/21/2010 ENER 0.0541 < 0.0300 0.166 3.30 8/28/2010 ENER 0.0599 < 0.0300 0.144 3.30 4/18/2011 ENER 0.0706 < 0.0300 0.141 3.60 5/9/2012 ENER 0.0757 < 0.0300 0.124 3.50 9/20/2012 ENER 0.0800 < 0.0300 0.139 3/6/2013 ENER 0.0851 < 0.0300 0.132 3.60

• 4/1/2014 ENER 0.0912 < 0.0300 0.112 3.60 0644 10/22/1996 ENER 8.02 0.0261 < 0.0300 0.456 2.49 < 0.200 . < 1.000 0.0100 < 0.200 5/15/1997 ENER 7.68 0.0150 < 0.0300 0.335 3.58 < 0.200 9/1211997 ENER 7.85 0.0150 < 0.0300 0.382 2.72 < 0.200 < 1.000 < 0.0100 < 0.200 10/16/1997 ENER _/--0.0180 0.439 5/14/1998 ENER 7.94 0.0175 < 0.0300 0.357 3.37 < 0.200 10/20/1998 ENER 0.0220 0.363 10/19/1999 ENER 0.0212 0.385 10/31/2000 ENER 0.0216 0.322 10/15/2001 ENER 0.0210 0.305 10/16/2002 ENER 0.0347 0.296 1/7/2004 ENER 0.0342 < 0.0300 0.226 3.74 612212004 ENER 0.0445 < 0.0300 0.244 3.80 7/6/2005 ENER 0.100 < 0.0300 0.197 4.20 8/30/2006 ENER 0.203 < 0.0300 0.0700 5.20 9/12/2007 ENER 0.155 < 0.0300 0.0420 4.70 10/1/2008 ENER 0.0928 < 0.0300 0.0370 4.76 8/10/2009 ENER 0.0831 < 0.0300 0.0360" 4.50 5/25/2010 ENER 0.0743 < 0.0300 0.0300 4.20 8/28/2010 ENER 0.0682 < 0.0300 0.0310 4.20 7/11/2011 ENER 0.0642 < 0.0300 0.0330 9/20/2012 ENER 0.0686 < 0.0300 0.0360 A-75 -*------------------

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TABLE A.1-4 WATER QUALITY FOR THE SOUTH IRRIGATION SUPPLY WELLS (cont'd.)

Minor Constituents Sample Point pH Unat Mo Se N03 Ra226 Ra228 v Th230 Name Date Lab (std. units) (mg/I) (mg/I) (mg/I). (mg/I) (pCi/I) (pCi/I) (mg/I) (pCi/I) 0644 10/10/2014 ENER 0.0570 < 0.0300 0.0310 8/1/2016 ENER 0.0431 < 0.0300 0.0270 0647 1/10/1997 ENER 7.72 0.0680 < 0.0300 0.0510 2.50 1.30 < 1.000 < 0.0100 < 0.200 3/4/1997 ENER 7.72 0.178 0.0600 0.0750 5.15 < 0.200 < 1.000 < 0.0100 < 0.200 4/17/1997 ENER 0.167 < 0.0300 0.0670 7/9/1997 ENER 8.12 d.167 < 0.0300 0.0680 4.90 < 0.200 1/21/1998 ENER 0.0959 < 0.0300 0.0630 7/21/1998 ENER 7.82 0.160 < 0.0300 0.0590 4.52 0.800 12/17/1998 ENER 8.02 0.180 < 0.0300 0.0640 4.22 0.200 7/21/1999 ENER 0.149 < 0.0300 0.0570 5.26 3/7/2000 ENER 0.0884 0.0510 9/6/2000 ENER 0.0580 0.0510 3.98 8/12/2002 ENER 0.0200 0.0560 3.33 8/21/2003 ENER 0.0302 < 0.0300 0.0460 3.50 8/19/200.f ENER 0.0376 < 0.0300 0.0390 8/10/2005 ENER 0.0388 < 0.0300 0.0380 2.80 10/4/2006 ENER 0.0552 < 0.0300 0.0380 2.60 8/22/2007 ENER 0.0387 < 0.0300 0.0320 2.70 10/2/2008 ENER 0.0274 < 0.0300 0.0310 2.67 7/21/2009 ENER 0.0294 < 0.0300 0.0320 2.76 11/6/2009 ENER 0.0408 < 0.0300 0.0290 2.70 6/15/2010 ENER 0.0540 < 0.0300 0.0380 3.30 8/28/2010 ENER 0.0431 < 0.0300 0.0390 3.10 10/30/2010 ENER 0.0492 < 0.0300 0.0400 2/9/2011 ENER 0.0505 < 0.0300 0.0450 5/11/2011 ENER 7.65 0.0482 < 0.0300 0.0440 3.70 0.0060 8/16/2011 ENER 0.0484 < 0.0300 0.0440 9/20/2012 ENER 0.0466 < 0.0300 0.0440 2/6/2013 HMC 7.38 0.0456 < 0.0300 0.0520 3.40 0.100 A-76 TABLE A.1-4 WATER QUALITY FOR THE SOUTH IRRIGATION SUPPLY WELLS (cont'd.)

Minor Constituents Sample Point pH Unat Mo Se N03 Ra226 Ra228 v Th230 Name Date Lab (std. units) (mg/I) (mg/I) (mg/I) (mg/I) * (pCi/I) (pCi/I) (mg/I) (pCi/I) 0647 8/8/2013 ENER 0.0439 < 0.0300 0.0370 8/27/2014 ENER 0.0429 < 0.0300 0.0300 0648 1/10/1997 ENER 7.74 0.0280 < 0.0300 0.0260 1.62 0.700 < 1.000 < 0.0100 < 0.200 3/4/1997 ENER 7.79 0.0440 < 0.0300 0.0370 2.55 < 0.200 < 1.000 < 0.0100 < 0.200 4/17/1997 ENER 0.0490 < 0.0300 0.0380 7/9/1997 ENER 8.01 0.0640 < 0.0300 0.0410 3.76 < 0.200 11/24/1997 ENER 0.0700 0,0480 1/21/1998 ENER 0.0718 < 0.0300 0.0490 7/21/1998 ENER 7.94 0.105 < 0.0300 0.0280 3.85 < 0.200 12/17/1998 ENER 7.93 0.0671 < 0.0300 0.0410 3.15 < 0.200 7/21/1999 ENER 0.0861 < 0.0300 0.0280 2.97 10/28/1999 ENER 0.0533 0.0530 1/24/2000 ENER 0.0790 0.0400 9/6/2000 ENER 0.0540 0.0400 3.66 5/4/2001 ENER 0.0535 0.0397 5/4/2001 ENER .# d.0528 # 0.0382 8/15/2001 ENER 0.0600 0.0420 3.44 5/8/2002 ENER 0.0250 0.0400 8/12/2002 ENER 0.0230 0.0320 2.55 5/27/2003 ENER 0.0243 0.210 0.0330 2.50 8/21/2003 ENER 0.0165 < 0.0300 0.0220 2.40 5/13/2004 ENER 7.58 0.0157 < 0.0300 0.0310 2.33 < 0.200 < 1.000 < 0.0100 < 0.200 8/19/2004 ENER 0.0135 0.0240 2.01 3/23/2005 ENER 7.85 0.0168 < 0.0300 0.0330 2.40 < 0.200 < 1.000 < 0.0100 0.600 8/10/2005 ENER 0.0132 0.0310 2.40 10/4/2006 ENER 0.0142 0.0350 2.40 5/1/2007 ENER 7.96 0.0140 < 0.0300 0.0330 2.50 < 0.200 < 1.000 < 0.0100 < 0.200 8/22/2007 ENER 0.0152 0.0350 2.30 4/10/2008 ENER 7.61 0.0131 < 0.0300 0.0370 2.20 -0.0500 -0.300 < 0.0100 0 # Signifies Quality Control Sample A-77 -------------------

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TABLE A.1-4 WATER QUALITY FOR THE SOUTH IRRIGATION SUPPLY WELLS (cont'd.)

Minor Constituents Sample Point pH Unat Mo Se N03 Ra226 Ra228 v Th230 Name Date Lab (std. units) (mg/I) (mg/I) (mg/I) (mg/I) (pCi/I) (pCUI) (mg/I) (pCi/I) 0649 1/16/1997 ENER 7.89 0.0120 < 0.0300 0.0070 0.930 < 0.200 < 1.000 < 0.0100 < 0.200 3/4/1997 ENER 7.65 0.0110 < 0.0300 0.0250 2.65 0.700 < 1.000 < 0.0100 < 0.200 4/17/1997 ENER 0.0100 < 0.0300 0.0210 7/9/1997 ENER 8.13 0.0110 < 0.0300 0.0200 2.66 < 0.200 1/21/1998 ENER 0.0756 < 0.0300 0.0310 1/21/1998 ENER # 0.0204 # < 0.0300 # 0.0260 7/21/1998 ENER 7.98 0.0121 < 0.0300 0.0210 2.94 < 0.200 12/17/1998 ENER 8.03 0.0149 < 0.0300 0.0220 2.42 0.200 7/21/1999 ACZ # 0.0145 # 0.0200 7/21/1999 ENER 0.0129 0.0240 7/21/1999 ENER # 0.0132 # 0.0230 10/28/1999 ENER 0.0160 0.0240 9/6/2000 ENER 0.0530 0.0500 8/15/2001 ENER 0.0440 0.0240 8/15/2001 ENER # 0.0450 # 0.0310 8/12/2002 ENER 0.0150 0.0280 8/21/2003 ENER 0.0156 < 0.0300 0.0140 2.10 8/19/2004 ENER 7.66 0.0160 < 0.0300 0.0170 2.23 < 0.200 < 1.000 < 0.0100 < 0.200 3/28/2005 ENER 0.438 < 0.0300 0.0930 8/10/2005 ENER 7.92 0.0174 < 0.0300 0.0230 2.00 < 0.200 < 1.000 < 0.0100 0.500 10/4/2006 ENER 7.49 0.0385 < 0.0300 0.0310 2.20 < 0.200 < 1.000 < 0.0100 < 0.200 5/1/2007 ENER 0.0246 < 0.0300 0.0250 8/22/2007 ENER 7.67 0.0589 < 0.0300 0.0290 1.90 0.700 10/22/2007 ENER 7.54 0.0894 < 0.0300 0.0290 2.20 0.700 < 0.0100 < 0.200 4/10/2008 ENER 0.0273 < 0.0300 0.0300 6/3/2008 ENER 0.0219 0.0270 10/2/2008 ENER 7.84 0.0254 < 0.0300 0.0320 2.30 -0.0400 -0.0700 < 0.0100 0.0600 5/6/2009 ENER 0.0184 < 0.0300 0.0300 6/16/2009 ENER

• 0.0195 0.0370 # Signifies Quality Control Sample A-78 TABLE A.1-4 WATER QUALITY FOR THE SOUTH IRRIGATION SUPPLY WELLS (cont'd.)

Minor Constituents Sample Point pH Unat Mo Se N03 Ra226 Ra228 v Th230 Name Date Lab (std. units) (mg/I) (mg/I) (mg/I) (mg/I) (pCi/I) (pCi/I) (mg/I) (pCi/I) 0649 11/13/2009 ENER 7.65 0.0235 < 0.0300 0.0380 2.40 -0.200 0.400 < 0.0100 0.0400 4/20/2010 ENER 0.0197 < 0.0300 0.0300 1.40 6/28/2010 ENER 0.0190 0.0320 8/28/2010 ENER 7.70 0.0246 < 0.0300 0.0520 1.80 0.0300 -0.0600 < 0.0100 0.0800 2/9/2011 ENER 0.0194 < 0.0300 0.0350 4/18/2011 ENER 0.0210 < 0.0300 0.0320 5/11/2011 ENER 7.78. 0.0199 < 0.0300 0.0320 1.50 0.0900 6/13/2011 ENER 0.0232 0.0350 8/16/2011 ENER 8.01 0.0211 < 0.0300 0.0340 1.70 0.0800 0.700 < 0.0100 0.0800 3/13/2012 ENER 7.45 0.0331 0.0400 0.0370 1.60 -0.0400 5/9/2012 ENER 0.0233 < 0.0300 0.0300 7/9/2012 ENER 0.0210 0.0350 8/1/2012 ENER 0.0225 < 0.0300 0.0400 9/20/2012 ENER 0.0230 < 0.0300 0.0330 2/6/2013 HMC 7.37 0.0262 < 0.0300 0.0450 1.70 0.180 3/6/2013 ENER 0.0248 0.0500 0.0320 8/15/2013 ENER 0.0239 < 0.0300 0.0370 4/1/2014 ENER 0.0308 < 0:0300 0.0410 3/4/2015 ENER 7.66 0.0290 < 0.0300 0.0380 3.50 0.190 0.800 < 0.0100 0.0400 2/22/2016 ENER 7.55 0.0302 < 0.0300 0.0360 2.40 3.50 0.700 < 0.0100 0.0800 3/15/2017 ENER 7.52 0.0261 < 0.0300 0.0280 2.90 0.0001 0.0004 < 0.0100 0.0001 0653 4/22/1997 ENER 8.05 0.806 < 0.0300 0.156 2.18 < 0.200 < 1.000 < 0.0100 < 0.200 6/2/1997 ENER 9.78 0.804 < 0.0300 0.215 2.31 < 0.200 4/15/1998 ENER 7.85 0.961 < 0.0300 0.196 2.64 0.500 10/19i1998 ENER 1.12 0.164 7/12/2000 ENER 1.08 0.142 9/6/2000 ENER 1.12 0.160 9/6/2000 ENER # 1.09 # 0.163 5/4/2001 ENER 1.12 0.129 # Signifies Quality .control Sample A-79 ---------*----------

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TABLE A.1-4 WATER QUALITY FOR THE SOUTH IRRIGATION SUPPLY WELLS (cont'd.)

Minor Constituents Sample Point pH Unat

• Mo Se N03 Ra226 Ra228 v Th230 Name Date Lab (std. units) (mg/I) (mg/I) (mg/I) (mg/I) (pCi/I) (pCi/I) (mg/I) (pCi/I) 0653 9/17/2001 ENER 0.965

• o.186 5/8/2002 ENER 0.968 0.151 10/10/2002 ENER 0.921 0.209 . 5/27/2003 ENER 0.0677 0.0700 0.0490 3.30 9/18/2003 ENER 0.950. < 0.0300 0.150 2.20 5/13/2004 ENER 1.02 < 0.0300 0.156 9/27/2004 ENER 0.873 0.156 1.92 217/2005 ENER 0.897 < 0.0300 0.128 3/23/2005 ENER 7.70 0.541 < 0.0300 0.0830 1.90 0.200 < 1.000 < 0.0100 0.500 12/11/2006 ENER 0.735 < 0.0300 ' 0.0770 9/12/2007 ENER 0.626 0.0690 3.80 10/1/2008 ENER 0.471 0.0530 4.10 7/21/2009 ENER 0.454 0.0490 4.20 5/25/2010 .ENER 0.419 0.0430 4.20 10/.19/2011 ENER 0.340 0.0490 2.00 10/22/2012 ENER 0.291 0.0310 3.80 6/17/2013 ENER .0.280 0.0320 4.00 11/14/2013 ENER 0.284 < 0.0300 0.0310 3.80 7/18/2014 ENER 0.256 < 0.0300 0.0280 8/1/2016 ENER 0.266 < 0.0300 0.0310 0657 8/5/1999 ENER 7.99 0.0450 < 0.0300 0.0340 1.79 < 0.200 < 1.000 < 0.0100 < 0.200 10/28/1999 ENER 0.0726 0.0440 9/6/2000 ENER 0.0p90 0.0520 3.89 5/4/2001 ENER 0.0714 0.0514 9/17/2001 ENER 0.0590 0.0580 . 3.40 5/8/2002 ENER 0.0560 0.0510 10/2/2002 ENER 0.0480 0.0550 3.26 5/27/2003 ENER 1.10 0.100 0.161 2.40 9/18/2003 ENER 0.0530 < 0.0300 0.0440 3.00 A-80 J TABLE A.1-4 WATER QUALITY FOR THE SOUTH IRRIGATION SUPPLY WELLS (cont'd.)

Minor Constituents Sample Point pH Unat Mo Se N03 Ra226 Ra228 v Th230 *Name Date Lab (std. units) (mg/I) (mg/I) (mg/I) (mg/I) (pCi/I) (pCi/I) (mg/I) (pCi/I) 0657 5/13/2004 ENER 0.0498 < 0.0300 0.0500 9/14/2004 ENER 0.0680 0.0390 4.49 5/9/2005 ENER 0.0536 < 0.0300 0.0400 9/26/2005 ENER 0.0689 0.0420 4.30 8/30/2006 ENER 0.0689 0.0360 3.10 5/1/2007 ENER 0.0566 < 0.0300 0.0320 8/22/2007 ENER 0.130 0.0310 2.90 10/22/2007 ENER 0.0641 0.0310 2.90 4/10/2008 ENER 0.0497 < 0.0300 0.0300 5/6/2009 ENER 0.0474 < 0.0300 0.0340 9/16/2009 ENER 0.0489 0.0400 3.50 9/16/2009 EPA6 # 0.0073 # 0.0582 # < 0.0500 # 0.0441

• 3.40 *< 0.0910 *< 0.290 # < 0.0100 *< 0.0520 11/6/2009 ENER 0.0477 < 0.0300 0.0380 3.70 4/21/2010 ENER 0.0517 < 0.0300 0.0440 3.70 8/28/2010 ENER 0.0476 < 0.0300 0.0440 3.90 5/11/2011 ENER 0.0534 < 0.0300 0.0460 5/9/2012 ENER 0.0592 < 0.0300 0.0350 5/13/2013 ENER 0.0622 < 0.0300 0.0390 8/8/2013 ENER 0.0568 0.0360 3.70 0658 4/13/1999 ENER 8.10 0.0073 < 0.0300 0.0200 0.440 < 0.200 2.30 < 0.0100 < 0.200 10/28/1999 ENER 0.0101 0.0350 9/2/2000 ENER 0.0140 0.0420 3.53 9/17/2001 ENER 0.0120 0.0530 2.60 10/2/2002 ENER 0.0110 0.0500 2.14 9/18/2003 ENER 0.0141 < 0.0300 0.0440 2.10 9/14/2004 ENER 0.0111 < 0.0300 0.0350 9/26/2005 ENER 0.0118 < 0.0300 0.0380 1.90 10/4/2006 ENER 0.0559 < 0.0300 0.0410 1.90 8/22/2007 ENER 0.0630 < 0.0300 0.0310 3.40 # Signifies Quality Control Sample *Signifies Specific Conductivity from HMC A-81 -------------------

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TABLE A.1-4 WATER QUALITY FOR THE SOUTH IRRIGATION SUPPLY WELLS (cont'd.)

Minor Constituents Sample Point pH Unat Mo Se N03 Ra226 Ra228 v Th230 Name Date Lab (std. units) . (mg/I) (mg/I) (mg/I) (mg/I) (pCi/I) (pCi/I) (mg/I) (pCi/I) 0658 6/3/2008 ENER 0.0161 0.0370 10/2/2008 ENER 0.0129 < 0.0300 0.0360 1.83 6/16/2009 ENER 0.0143 0.0430 9/16/2009 ENER 0.0158 < 0.0300 0.0480 2.23 9/16/2009 EPA6 # 0.0074 # 0.0205 #<0.0500 # 0.0575

• 2.20 *< 0.0890 *< 0.0830 # < 0.0100 *< 0.0710 11/9/2009 ENER 0.0170 < 0.0300 0.0510 2.60 4/20/2010 ENER 0.0157 < 0.0300 0.0500 2.20 8/28/2010 ENER 0.0358 < 0.0300 0.0390 3.00 10/27/2010 ENER 0.0156 < 0.0300 0.0460 2/9/2011 ENER 0.0140 < 0.0300 0.0410 5/11/2011 ENER 7.79 0.0111 < 0.0300 0.0380 1.90 0.0600 6/13/2011 ENER 0.0126 0.0390 3/13/2012 ENER 7.46 0.0113 < 0.0300 0.0380 2.00 0.0900 7/9/2012 ENER 0.0119 0.0350 8/1/2012 ENER 0.0101 < 0.0300 0.0400 8/1/2012 ENER # 0.0103 #< 0.0300 # 0.0420 9/20/2012 ENER 0.0104 < 0.0300 0.0390 1117/2012 ENER 7.65 0.0120 < 0.0300 0.0400 1.90 0.230 2/6/2013 HMC 7.40 0.0110 < 0.0300 0.0400 2.20 0.0200 10/29/2013 ENER 0.0102 < 0.0300 0.0340 2/25/2014 ENER 7.50. 0.0098 < 0.0300 0.0310 2.60 0.0600 8/26/2014 ENER 0.0128 < 0.0300 0.0350 2/19/2015 ENER 7.49 0.0192 < 0.0300 0.0330 2.90 1.90 2/21/2017 ENER 7.49 0.0149 < 0.0300 0.0260 3.70 0.0000 0.0000 < 0.0100 0.0000 0687 10/4/1995 ENER 7.95 0.0830 < 0.0300 0.0240 5.75 < 0.200 < 1.000 < 0.0100 < 0.200 12/13/1995 ENER 7.84 0.0740 < 0.0100 0.0370 11.5 < 0.200 < 1.000 < 0.0100 0.600 3/12/1996 ENER 7.74 0.0830 < 0.0300 0.0660 11.2 < 0.200 7/29/1996 ENER 7.57 0.141 0.0300 0.0440 9.73 0.200 1.000 0.0100 1.20 11/11/1996 ENER 8.02 0.142 < 0.0300 0.0540 .10.6 < 0.200 < 1.000 < 0.0100 < 0.200 # Signifies Quality Control Sample

• Signifies Specific Conductivity from HMC A-82 TABLE A.1-4 WATER QUALITY FOR THE SOUTH IRRIGATION SUPPLY WELLS (cont'd.)

Minor Constituents Sample Point pH Unat Mo Se N03 Ra226 Ra228 v Th230 Name Date Lab (std. units) (mg/I) (mg/I) (mg/I) (mg/I) (pCi/I) (pCi/I) (mg/I) (pCi/I) 0687 9/8/1997 ENER 0.145 0.0630 3/24/1998 ENER 7.96 0.175 < 0.0300 0.0830 10.1 < 0.200 3/24/1998 ENER # 7.91 # 0.162 # < 0.0300 # 0.0750 # 10.7 # < 0.200 9/29/1998 ENER 0.0270 0.0560 9/29/1999 ENER 0.219 0.0660 7.23 9/6/2000 ENER 0.206 0.0740 9.02 9/25/2001 ENER 0.173 0.0710 8.40 7/24/2002 ENER 0.121 0.0870 7.33 9/18/2003 ENER 0.106 < 0.0300 0.0490 6.70 9/14/2004 ENER 0.0983 0.0440 4.79 3/28/2005 ENER 0.108 < 0.0300 0.0390 9/26/2005 ENER 0.102 < 0.0300 0.0440 5.30 5/1/2007 ENER 0.117 < 0.0300 0.0380 0855 3/31/1995 ENER 7.74 0.0160 < 0.0300 0.215 1.61 < 0.200 < 1.000 0.0100 < 0.200 3/31/1995 ENER 7.75 0.0160 < 0.0300 0.222 1.84 < 0.200 < 1.000 0.0100 < 0.200 11/17/1995 ENER 8.01 0.0210 < 0.0300 0.256 2.89 0.300 < 1.000 < 0.0100 < 0.200 1/11/1996 ENER 7.99 0.0240 < 0.0300 0.241 3.22 < 0.200 <: 1.000 < 0.0100 < 0.200 5/8/1996 ENER 7.89 0.0200 < 0.0300 0.252 2.52 < 0.200 < 1.000 < 0.0100 1.30 11 /19/1996 ENER 7.94 0.0203 < 0.0300 0.222 2.50 1.30 < 1.000 < 0.0100 < 0.200 8/21/1997 ENER 0.0260 0.256 1/21/1998 ENER 0.0228 < 0.0300 0.281 8/10/1998 ENER 0.0228 0.242 9/1/1999 ENER 0.0273 0.283 8/23/2000 ENER 0.0290 0.330 8/23/2001 ENER 0.0300 0.290 7/24/2002 ENER 0.0360 0.300 8/19/2002 ENER 0.0370 0.307 8/21/2003 ENER 0.0383 < 0.0300 0.254 2.50 8/19/2004 ENER 0.0432 0.261 2.85 #Signifies Quality Control Sample A-83 -------------------

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TABLE A.1-4 WATER QUALITY FOR THE SOUTH IRRIGATION SUPPLY WELLS (cont'd.)

Minor Constituents Sample Point pH Unat Mo Se N03 Ra226 Ra228 v Th230 Name Date Lab (std. units) (mg/I) (mg/I) (mg/I) (mg/I) (pCi/I) (pCi/1) (mg/I) (pCi/I) 0855 21712005 ENER 0.0421 0.251 3.00 7/18/2007 ENER 0.0672 0.215 3.30 9/12/2007 ENER 0.0638 0.200 3.00 0862 6/1/1995 ENER 7.73 0.287 < 0.0300 0.123 2.94 0.600 < 1.000 < 0.0100 < 0.200 11/13/1995 ENER 7.72 0.261 < 0.0300 0.104 2.94 0.900 < 1.000 < 0.0100 < 0.200 1/26/1996 ENER 8.03 0.312 < 0.0300 0.112 3.16 < 0.200 < 1.000 < 0.0100 < 0.200 5/7/1996 ENER 7.83 0.433 < 0.0300 0.116 3.37 < 0.200 < 1.000 < 0.0100 < 0.200 12/2/1996 ENER 8.05 0.309 < 0.0300 0.109 2.93 0.300 < 1.000 < 0.0100 < 0.200 8/14/1997 ENER 0.320 0.0980 8/17/1998 ENER 0.367 0.0850 9/1/1999 ENER 0.417 0.0800 8/22/2000 ENER 0.574 0.0760 8/20/2001 ENER 0.480 0.0580 8/19/2002 ENER 0.600 0.0720 8/21/2003 ENER 0.732 < 0.0300 0.0700 2.40 8/19/2004 ENER 0.832 < 0.0300 0.0690 21212005 ENER 0.509 < 0.0300 0.0480 9/27/2005 ENER 0.664 < 0.0300 0.0590 3.90 1/10/2006 ENER 0.467 < 0.0300 0.0540 3.00 8/16/2006 ENER 0.594 < 0.0300 0.0540 3.80 1/31/2007 ENER 0.376 < 0.0300 0.0430 2.90 9/12/2007 ENER 0.625 < 0.0300 0.0470 3.20 1/14/2008 ENER 0.385 < 0.0300 0.0410 2.80 10/1/2008 ENER 0.462 < 0.0300 0.0390 3.55 1/13/2009 ENER 0.321 < 0.0300 0.0370 3.10 7/20/2009 ENER 0.480 < 0.0300 0.0450 3.39 3/1/2010 ENER 7.41 0.322 < 0.0300 0.0370 3.10 5/25/2010 ENER 0.300 < 0.0300 0.0420 3.70 1/12/2011 ENER 0.253 0.0300 0.0430 A-84 TABLE A.1.:.4 WATER QUALITY FOR THE SOUTH IRRIGATION SUPPLY WELLS (cont'd.)

Minor Constituents Sample Point pH Unat Mo Se N03 Ra226 Ra228 v Th230 Name Date Lab (std. units) (mg/I) (mg/I) (mg/I) (mg/I) (pCi/I) (pCi/I) (mg/I) (pCi/I) 0862 10/19/2011 ENER 0.265 < 0.0300 0.0460 5/22/2012 ENER 0.286 < 0.0300 0.0370 5/3/2013 ENER 0.288 < 0.0300 0.0420 1/28/2014 ENER 0.269 < 0.0300 0.0390 6/11/2014 ENER 0.288 < 0.0300 0.0380 10/17/2014 ENER 0.179 < 0.0300 0.0290 5/14/2015 ENER 0.189 < 0.0300 0.0300 5/6/2016 ENER 7.42 0.125 < 0.0300 0.0230 3.70 0.210 1.90 < 0.0100 -0.0200 8/4/2016 ENER 0.0970 < 0.0300 0.0240 10/24/2016 ENER 7.57 0.111 < 0.0300 0.0270 3.20 0.220 0.200 < 0.0100 0.0100 11/30/2016 ENER 0.0996 < 0.0300 0.0250 3/21/2017 ENER 7.46 0.0942 < 0.0300 0.0220 2.30 0.150 1.000 < 0.0100 i:J.200 0863 6/1/1995 ENER 7.86 1.18 < 0.0300 0.142 2.54 1.000 < 1.000 < 0.0100 < 0.200 11 /13/1995 ENER 7.83 1.06 < 0.0300 0.112 2.07 3.60 < 1.000 < 0.0100 < 0.200 1/26/1996 ENER 8.08 1.27 < 0.0300 0.107 2.49 < 0.200 < 1.000 < 0.0100 0.800 5/7/1996 ENER 7.70 1.81 < 0.0300 0.148 2.46 < 0.200 < 1.000 < 0.0100 < 0.200 12/2/1996 ENER 8.16 1.26 < 0.0300 0.101 2.02 < 0.200 < 1.000 < 0.0100 < 0.200 8/12/1997 ENER 1.19 0.0970 8/17/1998 ENER 1.25 0.0830 8/17/1998 ENER # 1.22 # 0.0820 9/1/1999 ENER 1.29 0.0820 8/25/2000 ENER 1.41 0.160 8/20/2001 ENER 1.20 0.110 8/19/2002 ENER 0.868 0.101 8/16/2006 ENER 0.134 < 0.0300 0.0470 4.60 9/12/2007 ENER 0.0287 < 0.0300 0.0270 4.30 9/20/2012 ENER 0.0350 < 0.0300 0.0220 0865 6/5/1995 ENER 7.65 0.183 < 0.0300 0.608 4.63 < 0.200 1.50 < 0.0100 < 0.200 #Signifies Quality Control Sample A-85 -------------------

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TABLE A.1-4 WATER QUALITY FOR THE SOUTH IRRIGATION SUPPLY WELLS (cont'd.)

Minor Constituents Sample Point pH Unat Mo Se N03 Ra226 Ra228 v Th230 Name Date Lab (std. units) (mg/I) (mg/I) (mg/I) (mg/I) (pCi/I) (pCi/1) (mg/I) (pCi/1) 0865 11/10/1995 ENER 7.99 0.188 < 0.0300 0.508 5.28 17.5 < 1.000 < 0.0100 0.200 1/26/1996 ENER 7.87 0.193 < 0.0300 0.535 4.64 < 0.200 < 1.000 < 0.0100 < 0.200 5/7/1996 ENER 7.64 0.305 < 0.0300 0.455 4.69 < 0.200 < 1.000 < 0.0100 < 0.200 12/2/1996 ENER 8.00 0.218 < 0.0300 0.466 4.27 < 0.200 < 1.000 < 0.0100 < 0.200 8/12/1997 ENER 0.293 0.423 8/17/1998 ENER 0.397 0.339 8/31/1999 ENER 0.460 0.306 8/22/2000 ENER 0.198 0.366 8/20/2001 ENER 0.170 0.250 8/20/2002 ENER 0.125 0.255 9/11/2007 ENER 0.151 < 0.0300 0.131 2.60 10/1/2008 ENER 0.128 < 0.0300 0.110 3.30 8/10/2009 ENER 0.242 < 0.0300 0.0770 3.10 3/1/2010 ENER 7.44 0.164 < 0.0300 0.0990 3.30 5/25/2010 ENER 0.216 < 0.0300 0.0720 3.80 8/28/2010 ENER 0.193 < 0.0300 0.0500 2.80 10/19/2011 ENER 0.204 < 0.0300 0.0850 3.00 9/20/2012 ENER 0.200 < 0.0300 0.0930 2.50 10/17/2014 ENER 0.172 < 0.0300 0.0430 5/14/2015 ENER 0.103 < 0.0300 0.0260 8/20/2015 ENER 0.0749 < 0.0300 0.0260 3.90 4/28/2016 ENER 7.60 0.0541 < 0.0300 0.0230 3.60 0.240 -0.0300 0.0100 0.0600 8/4/2016 ENER 0.0626 < 0.0300 0.0330 0866 6/8/1995 ENER 8.04 2.34 < 0.0300 0.165 0.500 0.300 1.70 < 0.0100 < 0.200 11/10/1995 ENER 7.99 1.91 < 0.0300 0.129 2.03 1.80 1.70 < 0.0100 0.600 1/26/1996 ENER 7.83 1.96 '< 0.0300 0.167 2.06 < 0.200 1.20 < 0.0100 < 0.200 5/7/1996 ENER 8.00 2.24 < 0.0300 0.142 2.28 < 0.200 < 1.000 < 0.0100 0.500 11/22/1996 ENER 7.79 1.91 < 0.0300 0.133 1.53

< 0.200 < 1.000 < 0.0100 < 0.200 8/1211997 ENER 1.95 0.128 A-86 TABLE A.1-4 WATER QUALITY FOR THE SOUTH IRRIGATION SUPPLY WELLS (cont'd.)

Minor Constituents Sample Point pH Unat Mo Se N03 Ra226 Ra228 v Th230 Name Date Lab (std. units) (mg/I) (mg/I) (mg/I) (mg/I) (pCi/I) (pCi/I) (mg/I) . (pCi/I) 0866 8/17/1998 ENER 2.13 0.106 8/31/1999 ENER 2.12 0.101 8/31/1999 ENER # 2.13 # 0.103 8/22/2000 ENER 2.06 0.162 8/22/2000 ENER #*2.09 # 0.159 8/23/2001 ENER 1.40 0.130 8/19/2002 ENER 0.933 0.163 9/11/2007 ENER 0.501 < 0.0300 0.0890 2.00 10/1/2008 ENER 0.302 < 0.0300 0.0590 4.40 7/20/2009 ENER 0.398 < 0.0300 0.0580 3.00 9/11/2009 ENER 0.380 < 0.0300 0.0510 3.20 3/1/2010 ENER 7.41 0.310 < 0.0300 0.0520 3.30 5/25/2010 ENER 0.450 < 0.0300 0.0450 2.80 10/19/2011 ENER 0.188 < 0.0300 0.0330 3.70 9/20/2012 ENER 0.684 < 0.0300 0.0370 2.10 5/3/2013 ENER 0.657 < 0.0300 0.0420 8/5/2014 ENER 0.636 < 0.0300 0.0370 2.60 9/11/2014 ENER 0.595 < 0.0300 0.0370 10/17/2014 ENER 0.564 < 0.0300 0.0370 10/21/2014 ENER 0.586 < 0.0300 0.0380 11/13/2014 ENER 0.520 < 0.0300 . 0.0360 12/23/2014 ENER 0.458 < 0.0300 0.0350 8/20/2015 ENER 0.608 < 0.0300 0.0380 2.80 8/4/2016 ENER 0.600 < 0.0300 0.0460 11/30/2016 ENER 0.453 < 0.0300 0.0460 3/3/2017 ENER 7.44 0.292 0.0400 0.0460 4.40 0.320 0.700 < 0.0100 0.0600 3/21/2017 ENER 7.40 0.355 < 0.0300 0.0340 3.50 0.170 0.500 < 0.0100 0.100 0869 7/20/1995 ENER 7.91 0.0300 < 0.0300 0.421 0.440 < 0.200 < 1.000 < 0.0100 0.500 11/13/1995 ENER 7.74 0.0290 < 0.0300 0.246 2.86 4.20 < 1.000 < 0.0100 0.500 # Signifies Quality Control Sample A-87 -------------------

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TABLE A.1-4 WATER QUALITY FOR THE SOUTH IRRIGATION SUPPLY WELLS (cont'd.)

Minor Constituents Sample Point pH Unat Mo Se N03 Ra226 Ra228 v Th230 Name Date Lab (std. units) (mg/I) (mg/I) (mg/I) (mg/I) (pCi/I) (pCi/I) (mg/I) (pCi/I)

• 0869 1/12/1996 ENER 8.16 0.0330 < 0.0300 0.337 3.05 0.300 < 1.000 < 0.0100 < 0.200 5/8/1996 ENER 8.03 0.0370 < 0.0300 0.376 2.89 < 0.200 < 1.000 < 0.0100 < 0.200 11/19/1996 ENER 8.06 0.0488 < 0.0300 0.292 3.06 2.10 < 1.000 < 0.0100 0.800 4/17/1997 ENER 0.0630 0.232 8/14/1997 ENER 7.87 0.0910 <*0.0300 0.273 2.91 < 0.200 4/14/1998 ENER 0.168 0.265 8/17/1998 ENER 7.75 0.230 < 0.0300 0.213 2.45 < 0.200 9/2/1999 ENER 0.408 0.190 8/22/2000 ENER 0.322 0.271 8/20/2001 ENER 0.0290 0.210 8/19/2002 ENER 0.427 0.242 8/21/2003 ENER 0.431 < 0.0300 0.226 2.60 8/19/2004 ENER 0.431 < 0.0300 0.180 21712005 ENER 0.216 < 0.0300 0.168 2.70 11/18/2005 ENER 0.228 < 0.0300 0.139 3.10 12/11/2006 ENER 0.253 < 0.0300 0.113 4.80 4/30/2007 ENER 0.315 < 0.0300 0.0960 5.00 9/12/2007 ENER 0.288 < 0.0300 0.0950 4.80 . 3/31/2008 ENER 0.302 < 0.0300 0.0700 5.81 10/1/2008 ENER 0.312 < 0.0300 0.0660 5.00 7/21/2009 ENER 0.337 < 0.0300 0.0570 5.20 5/25/2010 ENER 0.301 < 0.0300 0.0500 4.40 8/28/2010 ENER 0.310 < 0.0300 0.0440 4.10 10/19/2011 ENER 0.263 < 0.0300 0.0480 4.30 5/23/2012 ENER 0.254 < 0.0300 0.0470 9/20/2012 ENER 0.322 < 0.0300 0.0410 4.30 3/18/2013 HMC 0.280 < 0.0300 0.0320 6/17/2013 ENER 0.293 < 0.0300 0.0360 4.40 7/18/2014 ENER 0.276 0.0400 0.0550 3.40 A-88 TABLE A.1-4 WATER QUALITY FOR THE SOUTH IRRIGATION SUPPLY WELLS {cont'd.)

Minor Constituents Sample Point pH Unat Mo Se N03 Ra226 Ra228 v Th230 Name Date Lab (std. units) (mg/I) (mg/I) (mg/I) (mg/I) (pCi/I) (pCi/I) (mg/I) (pCi/I) 0943 8/28/1956 UNK 7.80 .0.600 6/15/1995 ENER 8.04 0.0171 < 0.0300 0.0530 8.56 < 0.200 3.00 < 0.0100 < 0.200 6/15/1995 ENER 8.04 0.0171 < 0.0300 0.0490 8.29 .11.2 1.60 < 0.0100 0.800 6/1211996 ENER 8.13 0.0290 < 0.0300 0.0620 9.36 < 0.200 < 1.000 < 0.0100 < 0.200 10/23/1996 ENER 8.25 0.0245 < 0.0300 0.0690 8.64 < 0.200 < 1.000 < 0.0100 < 0,_200 8/21/1997 ENER 8.68 0.0070 0.0500 < 0.0050 0.210 < 0.200 8/18/1998 ENER 8.29 0.0006 < 0.0300 < 0.0050 < 0.100 < 0.200 9/2/1999 ENER 0.0024 0.0060 9/2/1999 ENER # < 0.0003 # 0.0070 8/23/2000 ENER 0.0017 < 0.0050 8/29/2001 ENER < 0.0003 < 0.0050 8/29/2001 ENER # 0.0010 # 0.0050 11/13/2002 ENER 0.0010 < 0.0050 10/27/2003 ENER 0.0005 < 0.0050 3/9/2004 ENER 7.43 0.0180 < 0.0300 0.0290 5.25 0.300 12/8/2004 ENER 0.0136 0.0200 4/19/2005 ENER ' 7.66 0.0136 < 0.0300 < 0.0500 4.20 < 0.200 12/5/2005 ENER 0.0160 0.0270 3/16/2006 ENER 7.80 0.0179 < 0.0300 0.0290 4.00 0.400 12/19/2006 ENER 7.12 0.0149 < 0.0300 0.0220 3.80 < 0.200 3/8/2007 ENER 7.57 0.0184 < 0.0300 0.0280 4.20 0.600 12/3/2007 ENER 0.0185 0.0230 3/5/2008 ENER 7.48 0.0217 < 0.0300 0.0290 4.00 -0:0600 9/16/2008 ENER 7.40 0.0182 < 0.0300 0.0220 4.20 1.20 12/1/2008 ENER 0.0162 0.0220 6/15/2009 ENER 7.26 0.0187 < 0.0300 0.0220 4.00 0.180 121712009 ENER 0.0199 < 0.100 0.0240 3/3/2010 ENER 7.52 0.0229 < 0.0300 0.0290 5.20 0.120 612212010 ENER 7.74 0.0724 < 0.0300 0.0870 6.80 -0.0500 # Signifies Quality Control Sample A-89 ------------* -------

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TABLE A.1-4 WATER QUALITY FOR THE SOUTH IRRIGATION SUPPLY WELLS (cont'd.)

Minor Constituents Sample Point pH Unat Mo Se N03 Ra226 Ra228 v Th230 Name Date Lab (std. units) (mg/I) (mg/I) (mg/I) (mg/I) (pCi/I) (pCi/I) (mg/I) (pCi/I) 0943 8/5/2010 ENER 8.09 0.0753 < 0.0300 0.0870 9.40 0.0900 9/21/2010 ENER 0.0208 < 0.0300 0.0240 4.40 10/27/2010 ENER 0.0248 < 0.0300 0.0240 12/6/2010 ENER 0.0239 0.0220 4/13/2011 ENER 7.46 0.0220 < 0.0300 0.0250 4.20 0.330 1117/2011 ENER 0.0197 0.0200 8/16/2012 ENER 7.39 0.0484 < 0.0300 0.0470 4.30 0.560 -0.400 < 0.0100 0.0200 11/30/2012 ENER 0.0402 < 0.0300 0.0340 2/19/2014 ENER 7.19 0.0330 < 0.0300 0.0230 3.90 2.60 11/17/2014 ENER 7.26 0.0326 < 0.0300 0.0210 3.70 0.810 2.30 < 0.0100 0.0050 2/17/2015 ENER 0.0306 < 0.0300 0.0220 4/30/2015 ENER 7.30 0.0307 < 0.0300 0.0190 3.60 0.330 -0.200 < 0.0100 0.100 8/7/2015 ENER 7.38 0.0280 < 0.0300 0.0240 3.50 0.800 1.90 < 0.0100 0.0200 10/8/2015 ENER 0.0798 < 0.0300 0.0730 12/10/2015 ENER 0.0303 < 0.0300 0.0220 1/26/2016 ENER 7.35 0.0354 < 0.0300 0.0240 3.90 0.410 0.100 < 0.0100 0.200 2/25/2016 ENER 0.0356 < 0.0300 0.0260 9/15/2016 ENER 0.0805 < 0.0300 0.0550 10/18/2016 ENER 0.0960 < 0.0300 0.0760 2/10/2017 ENER 0.0861 < 0.0300 0.0570 2/17/2017 ENER 0.0898 < 0.0300 0.0600 2/28/2017 ENER 7.34 0.0707 < 0.0300 0.0420 4.30 0.330 1.20 < 0.0100 0.200 0996 9/18/1995 ENER 7.85 0.134 < 0.0300 0.0400 5.66 < 0.200 < 1.000 < 0.0100 0.300 12/13/1995 ENER 7.88 0.149 < 0.0100 0.0350 5.12 < 0.200 < 1.000 < 0.0100 < 0.200 3/12/1996 ENER 7.81 0.146 < 0.0300 0.0790 5.38 < 0.200 11/11/1996 ENER 8.00 0.168 < 0.0300 0.0830 4.75 < 0.200 < 1.000 < 0.0100 < 0.200 9/8/1997 ENER 7.98 0.0620 < 0.0300 0.0600 3.79 < 0.200 11119/1998 ENER 8.08 0.0640 < 0.0300 0.0620 3.59 < 0.200 9/29/1999 ENER 0.0754 0.0530 3.08 A -90 TABLE A.1-4 WATER QUALITY FOR THE SOUTH IRRIGATION SUPPLY WELLS (cont'd.)

Minor Constituents Sample Point pH Unat Mo Se N03 Ra226 Ra228 v Th230 Name Date Lab (std. units) (mg/I) (mg/I) (mg/I) (mg/I) (pCi/I) (pCi/I) (mg/I) (pCi/I) 0996 9/29/1999 ENER

1. 0.0670 # 0.0540 # 3.12 ---9/6/2000 ENER 0.172 0.0660 5.42 9/6/2000 ENER # 0.172 # 0.0700 # 5.55 11/3/2000 ENER 7.51 0.0795 < 0.0300 0.0769 4.85 < 0.200 < 1.000 < 0.0100 < 0.200 9/25/2001 ENER 0.0690 0.0840 5.20 7/24/2002 ENER 0.0350 0.0940 5.15 9/18/2003 ENER 0.0430 < 0.0300 0.0550 4.80 9/14/2004 ENER 0.0454 < 0.0300 0.0440 9/26/2005 ENER 0.0516 < 0.0300 . 0.0430 3.70 8/30/2006 ENER 0.0450 < 0.0300 0.0390 4.10 8/22/2007 ENER 0.0567 < 0.0300 0.0330 4.10 9/16/2009 ENER 0.0418 < 0.0300 0.0390 4.95 9/16/2009 EPA6 # 0.0073 # 0.0526 # < 0.0500 # 0.0478 *4.70 *< 0.360 *< 0.170 # < 0.0100 *< -0.0140 11/9/2009 ENER 0.0412 < 0.0300 0.0420 11.3 4/21/2010 ENER 0.0433 < 0.0300 0.0460 4.80 8/27/2010 ENER 0.0423 < 0.0300 0.0460 4.60 11/9/2011 ENER 0.0508 < 0.0300 0.0470 9/20/2012 ENER 0.0627 < 0.0300 0.0390 8/8/2013 ENER 0.0793 < 0.0300 0.0310 12/15/2016 ENER 0.0792 < 0.0300 0.0250 CW29 6/5/1995 ENER 7.86 0.0114 < 0.0300 0.0110 0.360 0.600 4.10 < 0.0100 < 0.200 6/7/1995 ENER 7.99 0.0155 < 0.0300 0.0340 0.830 0.400 < 1.000 < 0.0100 < 0.200 6/9/1995 ENER 7.98 0.0170 < 0.0300 0.0790 1.60 0.300 < 1.000 < 0.0100 0.600 11/13/1995 ENER 8.02 0.0110 < 0.0300 0.0230 0.390 1.000 10/14/1996 ENER 7.79 0.0144 < 0.0300 0.0160 0.460 . 0.400 < 1.000 < 0.0100 < 0.200 5/30/1997 ENER 0.0090 < 0.0140 11/8/1997 ENER 7.93 0.0120 < 0.0300 0.0170 0.430 < 0.200 5/19/1998 ENER 0.0164 0.0280 11/5/1998 ENER 7.85 0.0098 < 0.0300 0.0120 0.410 < 0.200 # Signifies Quality Control Sample

• Signifies Specific Conductivity from HMC A-91 -------------------

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TABLE A.1-4 WATER QUALITY FOR THE SOUTH IRRIGATION SUPPLY WELLS (cont'd.)

Minor Constituents Sample Point pH Unat Mo Se N03 Ra226 Ra228 v Th230 Name Date Lab (std. units) (mg/I) (mg/I) (mg/I) (mg/I) (pCi/I). (pCi/I) (mg/I) (pCi/I) CW29 6/3/1999 ENER 0.0123 0.0200 6/21/2000 ENER 0.0101 0.0272 6/6/2001 ENER 0.0150 0.0300 612412002 ENER 0.0150 0.0310 7/10/2003 ENER 8.16 0.0532 < 0.0300 0.155 1.80 < 0.200 < 1.000 < 0.0100 < 0.200 21512004 ENER 0.135 < 0.0300 0.173 7/13/2004 ENER 7.54 0.117 < 0.0300 0.170 2.21 < 0.200 5/17/2005 ENER 0.161 < 0.0300 0.152 2.30 8/14/2006 ENER 7.76 0.213 < 0.0300 0.155 2.40 < 0.200 4/30/2007 ENER 0.218 < 0.0300 0.133 2.80 j 9/12/2007 ENER 7.63 0.262 < 0.0300 0.125 2.50 < 0.200 3/31/2008 ENER 0.264 < 0.0300 0.117 3.22 6/15/2009 ENER 7.63 0.272 < 0.0300 0.103 2.90 0.150 5/25/2010 ENER 7.45 0.249 < 0.0300 0.0850 3.20 0.200 8/28/2010 ENER 0.237 < 0.0300 0.0830 3.20 4/18/2011 ENER 0.238 < 0.0300 0.0720 7/18/2011 ENER 7.97 0.239 < 0.0300 0.0630 3.10 0.0400 5/22/2012 ENER 0.298 < 0.0300 0.0370 3/19/2013 ENER 0.223 < 0.0300 0.0590 6/17/2013 ENER 7.80 0.212 < 0.0300 0.0530 3.40 2.80 10/3/2014 ENER 7.61 0.220 < 0.0300 0.0510 3.20 Oo180 3/19/2015 ENER 0.206 < 0.0300 0.0440 8/19/2015 ENER 0.186 < 0.0300 0.0510 3.30 5/6/2016 ENER 7.46 0.155 < 0.0300 0.0330 2.80 0.330 2.10 < 0.0100 0.0200 3/20/2017 ENER 0.180 < 0.0300 0.0390 CW42 11/11/1996 ENER 7.75 0.737 < 0.0300 0.368 2.25 < 0.200 < 1.000 < 0.0100 < 0.200 11/12/1996 ENER . 7.83 0.401 < 0.0300 0.246 2.11 . < 0.200 < 1-.000 < 0.0100 < 0.200 1/23/1997 ENER 7.74 0.740 < 0.0300 0.313 2.58 0.400 4/23/1997 ENER 7.84 0.879 < 0.0300 0.288 2.67 < 0.200 A-92 TABLE A.1-4 WATER QUALITY FOR THE SOUTH IRRIGATION SUPPLY WELLS (cont'd.)

Minor Constituents Sample Point pH Unat Mo Se N03 Ra226 Ra228 v Th230 *Name Date Lab (std. units) (mg/I) (mg/I) (mg/I) . (mg/I) (pCi/I) (pCi/I) (mg/I) (pCi/I) CW42 9/29/1997 ENER 0.755 < 0.0300 0.175 4/14/1998 ENER 8.10 1.01 < 0.0300 0.302 2.77 0.500 9/28/1998 ENER 1.18 < 0.0300 0.280 9/2/1999 ENER 1.02 0.220 9/6/2000 ENER 1.27 0.199 9/27/2001 ENER 1.18 0.215 10/2/2002 EN ER 1.01 0.232 7/17/2003 ENER 7.89 0.985 < 0.0300 0.247 2.50 < 0.200 < 1.000 < 0.0100 < 0.200 8/4/2004 ENER 0.813 < 0.0300 0.189 2.21 2/21/2005 ENER 0.736 < 0.0300 0.137 12/13/2005 ENER 0.746 < 0.0300 0.110 3.20 8/16/2006 ENER 0.621 < 0.0300 0.0920 3.80 4/30/2007 ENER 0.454 < 0.0300 0.109 9/13/2007 ENER 0.350 < 0.0300 0.108 3.20 3/31/2008 ENER 0.579 < 0.0300 0.0650 10/1/2008 ENER 0.249 < 0.0300 0.0980 3.10 6/15/2009 ENER 0.309 < 0.0300 0.0820 3.20 8/19/2009 ENER 0.220 < 0.0300 0.0540 4.40 5/25/2010 ENER 0.397 < 0.0300 0.0350 4.10 2128/2011 ENER 0.330 < 0.0300 0.0350 7/18/2011 ENER 0.355 < 0.0300 0.0370 3.80 5/22/2012 ENER 0.221 < 0.0300 0.0620 6/17/2013 ENER 0.282 < 0.0300 0.0380 3.70 11/14/2013 ENER 0.318 < 0.0300 0.0390 3.00 10/10/2014 ENER 0.324 < 0.0300 0.0330 8/18/2015 ENER 0.246 < 0.0300 0.0300 2.40 8/9/2016 ENER

< 0.0300 0.0290 8/24/2016 ENER 0.228 < 0.0300 0.0250 4.00 3/21/2017 ENER 0.205 < 0.0300 0.0240 A-93 -------------------

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TABLE A.1-4 WATER QUALITY FOR THE SOUTH IRRIGATION SUPPLY WELLS (cont'd.)

Minor Constituents Sample Point pH Unat Mo Se N03 Ra226 Ra228 v Th230 Name Date Lab (std. units) (mg/I) (mg/I) (mg/I) (mg/I) (pCi/I) (pCi/I) (mg/I) (pCi/I) CW44 2/26/1997 ENER 7.68 1.11 < 0.0300 0.0880 2.33 < 0.200 < 1.000 < 0.0100 < 0.200 4/22/1997 ENER 8.05 1.21 < 0.0300 0.0640 2.18 < 0.200 5/15/1997 ENER 7:68 1.41 < 0.0300 0.0800 2.36 < 0.200 9/12/1997 ENER 8.00 1.01 < 0.0300 0.0870 2.09 < 0.200 < 1.000 < 0.0100 0.600 4/13/1998 ENER 7.78 1.11 < 0.0300 0.0790 2.48 0.200 9/28/1998 ENER 1.29 < 0.0300 0.0790 10/28/1999 ENER 1.02 0.0960 5/9/2000 ENER 0.911 0.0880 5/9/2000 ENER # 0.973 # 0.102 8/15/2000 ENER 0.926 0.106 5/4/2001 ENER # 1.01 # 0.0730 5/4/2001 ENER 1.01 0.0730 9/17/2001 ENER 0.848 0.103 5/8/2002 ENER 0.846 0.0770 10/2/2002 ENER 0.824 0.0750 5/27/2003 ENER 1.05 0.0400 0.0690 2.10 7/9/2003 ENER 8.11 0.772 < 0.0300 0.0650 2.10 < 0.200 < 1.000 < 0.0100 < 0.200 7/22/2004 ENER 0.797 < 0.0300 0.0600* 2.03 12/12/2005 ENER 0.636 < 0.0300 0.0470 2.80 8/14/2006 ENER 0.662 < 0.0300 0.0520 2.70 9/11/2007 ENER 0.677 < 0.0300 0.0450 2.60 6/9/2009 ENER 0.492 < 0.0300 0.0330 0.600 5/26/2010 ENER 0.423 < 0.0300 0.0340 3.00 8/9/2011 ENER 0.384 < 0.0300 0.0320 3.10 10/9/2012 ENER 0.360 < 0.0300 0.0340 3.20 11 /14/2013 ENER 0.319 < 0.0300 0.0340 0.600 6/11/2014 ENER 0.303 < 0.0300 0.0340 9/9/2014 ENER 0.263 < 0.0300 0.0320 7/29/2015 ENER 0.248 < 0.0300 0.0400 3.30 # Signifies Quality Control Sample A-94 TABLE A.1-4 WATER QUALITY FOR THE SOUTH IRRIGATION SUPPLY WELLS (cont'd.)

Minor Constituents Sample Point pH Unat Mo Se N03 Ra226 Ra228 v Th230 Name Date Lab (std. units) (mg/I) (mg/I) (mg/I) (mg/I) (pCi/I) (pCi/I) (mg/I) (pCi/I) CW44 7/5/2016 ENER 7.47 0.265 < 0.0300. 0.0380 3.00 0.180 0.600 < 0.0100 0.0040 12/1/2016 ENER 0.221 < 0.0300 0.0350 CW45 2/26/1997 ENER 7.64 1.80 < 0.0300 0.274 1.07 < 0.200 < 1.000 < 0.0100 < 0.200 4/22/1997 ENER 8.03 1.79 < 0.0300 0.219 1.63 < 0.200 9/29/1997 ENER 1.68 < 0.0300 0.219 4/13/1998 ENER 8.02 1.90 < 0.0300 0.240 1.95 0.600 9/28/1998 ENER 2.05 < 0.0300 0.207 9/29/1999 ENER 1.88 0.176 9/29/1999 ENER # 1.95 # 0.167 8/15/2000 ENER 1.76 0.160 9/26/2001 ENER 1.71 0.115 10/2/2002 ENER 1.62 0.105 7/16/2003 ENER 8.07 1.52 < 0.0300 0.0720 1.10 < 0.200 < 1.000 < 0.0100 < 0.200 712212004 ENER 0.984 < 0.0300 0.107 1.85 4/11/2005 ENER 1.09 < 0.0300 0.0750 8/14/2006 ENER 1.04 < 0.0300 0.0400 1.80 3/26/2007 ENER 0.559 < 0.0300 0.0730 9/11/2007 ENER 1.04 < 0.0300* 0.0380 2.00 3/31/2008 ENER 0.605 < 0.0300 0.0620 10/1/2008 ENER 0.900 < 0.0300 0.0360 2.10 6/2/2009 ENER 0.520 < 0.0300 0.0510 5/26/2010 ENER 0.608 <: 0.0300 0.0430 1.70 4/18/2011 ENER 0.505 < 0.0300 0.0310 8/9/2011 ENER 0.440 < 0.0300 0.0220 1.000 5/7/2012 ENER 0.469 < 0.0300 0.0280 1117/2012 ENER 7.64 0.509 < 0.0300 0.0180 0.700 0.260 3/6/2013 ENER 0.476 < 0.0300 0.0300 6/17/2013 ENER 0.454 < 0.0300 0.0440 1.80 11/14/2013 ENER 0.482 < 0.0300 0.0390 1.80 # Signifies Quality Control Sample A-95 -------------------

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TABLE A.1-4 WATER QUALITY FOR THE SOUTH IRRIGATION SUPPLY WELLS (cont'd.)

Minor Constituents Sample Point pH Unat Mo Se N03 Ra226 Ra228 v Th230 Name Date Lab (std. units) (mg/I) (mg/I) (mg/I) (mg/I) (pCi/I) (pCi/I) (mg/I) (pCi/I) CW45 11/13/2014 ENER 0.354 < 0.0300 0.0420 12/23/2014 ENER 0.354 <*0.0300 0.0410 3/31/2015 ENER 7.57 0.435 < 0.0300 0.0440 1.80 0.220 0.300 < 0.0100 0.0050 8/19/2015 ENER 0.386 < 0.0300 0.0320 3/4/2016 ENER 7.43 0.396 < 0.0300 0.0320 1.40 0.200 1.000 < 0.0100 0.100 8/26/2016 ENER 0.391 < 0.0300 0.0310 3/24/2017 ENER 7.46 0.352 < 0.0300 0.0370 1.70 0.340 1.40 < 0.0100 0.100 CW53 6/28/2004 ENER 7.76 0.303 < 0.0300 0.0730 0.540 0.700 < 1.000 < 0.0100 < 0.200 12/12/2005 ENER 0.794 < 0.0300 0.0340 1.80 10/1112006 ENER 0.0972 < 0.0300 0.0200 1.80 11/13/2007 ENER 0.115 < 0.0300 0.0170 1.80 6/2/2008 ENER 0.0461 < 0.0300 0.0120 1.80 7/20/2009 ENER 0.0622 < 0.0300 0.0150 1.40 6/15/2010 ENER 0.244 < 0.0300 0.0250 1.80 3/1/2011 ENER 0.194 < 0.0300 0.0210 1.50 9/20/2012 ENER 0.119 < 0.0300 0.0270 11/14/2013 ENER 0.116 < 0.0300 0.0220 1.40 4/15/2014 ENER 0.0874 < 0.0300 0.0200 9/10/2014 ENER 0.102 < 0.0300 0.0180 5/12/2016 ENER 7.75 0.0850 < 0.0300 0.0180 1.40 0.230 0.500 < 0.0100 0.0080 10/21/2016 ENER 7.91 0.0640 < 0.0400 0.0160 1.70 0.130 0.500 < 0.0100 -0.0050 A-96 Table A.2-1 Water Quality of the North Irrigation Major Constituents Sample Point Ca Mg K Na HC03 C03 Cl 804 TDS Cond(calc.)

lon_B Name Date Lab (mg/I) (mg/I) (mg/I) (mg/I)* (mg/I) (mg/I) (mg/I) (mg/I) (mg/I) (micromhos/ (ratio) IRR28 9/15/1999 HMC 9/15/1999 HMC 10/2/2002 ENER 881 2070 5/14/2003 ENER 184 936 2070 51412004 ENER 190 933 2120

• 2701 512712004 ENER 170 950 2110

• 2733 8/18/2004 ENER 956 2140 *2726 10/6/2004 ENER 194 838 2090

• 2723 4/12/2005 ENER 176 955 2220

• 2867 5/6/2005 ENER 192 1010 2230

• 2887 512012005 ENER 194 916 2120

• 2693 512712005 ENER 176 907 2050

• 2678 6/3/2005 ENER 182 926 2040 6/10/2005 ENER 186 943 2000

• 2672 6/17/2005 ENER . 167 899 2100

• 2635 10/11/2005 ENER 170 863 2110

• 2751 3/1/2006 ENER 197 926 2230

• 2210 4/10/2006 ENER 185 985 2150

• 3061 6/26/2006 ENER 158 645 1550

• 2310 8/14/2006 ENER 928 1980

• 2671 10/2/2006 ENER 161 925 2020 10/2/2006 HMC 2824 4/11/2007 ENER 173 904 2130

• 2718 4/30/2007 ENER 164 980 2240 *_2828 6/26/2007 ENER 163 856 2010

• 2684 8/17/2007 ENER 978 2130

• 2734 10/10/2007 ENER 184 885 2100

• 2763 4/1/2008 ENER 90.0 1020 2050

• 2785 6/2/2008 ENER 152 893 1750

• 2523

• Signifies Specific Conductivity from HMC A-97 -------------------

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Table A.2-1 Water Quality of the North Irrigation (cont'd.)

Major Constituents Sample Point Ca Mg K Na HC03 C03 Cl 804 TDS Cond(calc.)

lon_B Name Date Lab (mg/I) (mg/I) (mg/I) (mg/I) (mg/I) (mg/I) (mg/I) (mg/I) (mg/I) (micromhos/ (ratio) IRR28 9/24/2008 ENER 157 867 1950

• 2547 4/20/2009 ENER 170 912 2020 *2697 4/20/2009 ENER # 171 # 913 # 2050 6/2/2009 ENER 175 874 1980

• 2610 6/2/2009 ENER # 173 # 868 # 1980 7/24/2009 ENER 852 2020 *2636 9/28/2009 ENER 177 940 2080

• 2753 6/17/2011 ENER 135 672 1490 *2093 6/23/2011 ENER 138 685 1570 *2200 6/29/2011 ENER 138 676 1490

• 2145 7/7/2011 ENER .110 532 1290 7/15/2011 ENER 87.0 455 1160

• 1630 7/19/2011 ENER 109 559 1360 7/28/2011 ENER 104 523 1270

• 1790 8/3/2011 ENER 103 522 1230

• 1785 8/18/2011 ENER 118 682 1450 *2045 8/24/2011 ENER 629 1460 .

• 1986 8/30/2011 ENER 114 604 1390 9/6/2011 ENER 127 612 1420. 9/13/2011 ENER 125 607 1410

• 1944 9/20/2011 HMC 130 626 1470 9/27/2011 ENER 138 676 1530

• 2151 1017/2011 ENER 133 639 1490 10/12/2011 ENER 210 59.9 7.10 204 384 < 5.00 132 636 1470

• 2107 1.04 8/7/2012 ENER 187 744 1750

• 2406 8/15/2012 ENER 198 857 2010

• 2665 8/22/2012 ENER 183 738 1830

• 2450 8/27/2012 ENER 179 714 1780

• 2443 8/28/2012 ENER 172 686 1780

• 2427 # Signifies Quality Control Sample

• Signifies Specific Conductivity from HMC A-98 Table A.2-1 Water Quality of the North Irrigation (cont'd.)

Major Constituents Sample Point Ca Mg K Na HC03 C03 Cl 504 TDS Cond(calc.)

lon_B Name Date Lab . (mg/I) (mg/I) (mg/I) (mg/I) (mg/I) (mg/I) (mg/I) (mg/I) (mg/I) (micromhos/ (ratio) Irr 28 8/28/2012 ENER 171 681 1750

• 2438 . 8/28/2012 ENER 181 719 1760

• 2422 8/28/2012 ENER 184 730 1720

• 2423 8/28/2012 ENER 181 717 1740

• 2423 9/5/2012 ENER 180 706 1770

• 2364 9/12/2012 ENER. 186 744 1860

• 2472 9/18/2012 ENER 184 755 1800

• 2462 9/25/2012 ENER 170 672 1810

• 2442 10/2/2012 ENER 247 71.0 9.00 245 460 < 5.oo* 195 768 1830

• 2475 0.995 10/11/2012 ENER 189 741 1860

• 2519 10/17/2012 ENER 200 770 1880

• 2522 10/24/2012 ENER 200 796 1920

• 2564 10/31/2012 ENER 206 814 1920

• 2502

• Signifies Specific Conductivity from HMC A-99 -------------------

---

Table A.2-2 Water Quality of the North Irrigation Minor Constituents Sample Point pH Unat Mo Se N03 Ra226 Ra228 v Th230 Name Date Lab (std. units) (mg/I) (mg/I) (mg/I) (mg/I) (pCi/I) (pCi/I) (mg/I) (pCi/I) IRR28 10/2/2002 ENER 0.233 0.0780 5/14/2003 ENER 0.237 < 0.0300 < 0.0050 4.20 5/4/2004 ENER 0.234 < 0.0300 0.0690 5/27/2004 ENER 0.294 < 0.0300 0.0700 8/18/2004 ENER 0.270 0.0640 4.73 10/6/2004 ENER 0.265 < 0.0300 0.0630 4/12/2005 ENER 0.478 0.0900 0.106 1.60 5/6/2005 ENER 0.510 0.110 0.118 7.80 5/20/2005 ENER 0.331 < 0.0300 0.0780 6.90 5/27/2005 ENER 0.262 < 0.0300 0.0620 6.70 6/3/2005 ENER 0.328 < 0.0300 0.0820 6.60 6/10/2005 ENER 0.326 < 0.0300 0.0720 6.40 6/17/2005 ENER 0.307 < 0.0300 0.0820 6.00 10/11/2005 ENER 0.277 < 0.0300 0.0630 6.70 3/1/2006 ENER 0.354 0.0400 0.0780 6.99 4/10/2006 ENER 0.350 0.0500 0.0850 6.80 6/26/2006 ENER 0.302 < 0.0300 0.0670 2.70 8/14/2006 ENER 0.357 0.0880 5.80 10/2/2006 ENER 0.377 0.0700 0.0870 5.50 4/11/2007 ENER 0.318 < 0.0300 0.0760 6.00 4/30/2007 ENER 0.414 0.0400 0.0890 8.10 6/26/2007 ENER 0.317 < 0.0300 0.0760 7.50 8/17/2007 ENER 0.380 0.0830 7.70 10/10/2007 ENER 0.389 0.0400 0.0900 7.40 4/1/2008 ENER 0.465 0.0500 0.0830 8.49 6/2/2008 ENER 0.285 < 0.0300 0.0590 6.20 9/24/2008 ENER 0.318 0.0300 0.0560 6.05 4/20/2009 ENER 0.389 0.0500 0.0650 7.10 4/20/2009 ENER # 0.387 # 0.0500 # 0.0650 # 6.80 # Signifies Quality Control Sample A-100 Table A.2-2 Water Quality of the North Irrigation (cont'd.)

Minor Constituents Sample Point pH Unat Mo Se *N03 Ra226 Ra228 v Th230 Name Date Lal> (std. units) (mg/I) (mg/I) (mg/I) (mg/I) (pCi/I) (pCi/I) (mg/I) (pCi/I) IRR28 6/2/2009 ENER 0.307 < 0.0300 0.0630 6.28 6/2/2009 ENER # 0.310 # 0.0300 # 0.0660 # 6.06 7/24/2009 ENER 0.369 0.0610 6.80 9/28/2009 ENER 0.450 0.0700 0.0790 6.30 6/17/2011 ENER 0.198 < 0.0300 0.0420 4.40 6/23/2011 ENER 0.251 < 0.0300 0.0430 4.50 6/29/2011 ENER 0.222 < 0.0300 0.0490 4.20 7/7/2011 ENER 7.90 0.113 < 0.0300 0.0280 4.20 7/15/2011 ENER 0.0837 < 0.0300 0.0150 4.40 7/19/2011 ENER 0.155 < 0.0300 0.0280 4.20 7/28/2011 ENER 0.130 < 0.0300 0.0210 4.50 8/3/2011 ENER 0.132 < 0.0300 0.0220 4.50 8/18/2011 ENER 0.0944 < 0.0300 0.0240 4.70 8/24/2011 ENER 0.114 0.0270 4.50 8/30/2011 ENER 0.107 < 0.100 0.0250 4.80 9/6/2011 ENER 0.124 < 0.0300 0.0270 4.50 9/13/2011 ENER 0.104 < 0.0300 0.0260 4.20 . 9/20/2011 HMC 0.128 < 0.0300 0.0330 4.40 9/27/2011 ENER 0.128 < 0.0300 0.0340 4.40 101712011 ENER 0.127 < 0.0300 0.0290 4.20 10/12/2011 ENER 7.86 0.122 < 0.0300 0.0320 4.40 0.390 -0.400 < 0.100 0.0500 8/7/2012 ENER 0.149 < 0.0300 0.0330 4.20 8/15/2012 ENER 0.176 < 0.0300 0.0390 4.30 8/22/2012 ENER 0.146 < 0.0300 0.0340 4.00 8/27/2012 ENER 0.142 < 0.0300 0.0320 < 0.100 8/28/2012 ENER 0.145 < 0.0300 0.0310 8/28/2012 ENER 0.141 < 0.0300 0.0320 8/28/2012 ENER 0.135 < 0.0300 0.0310 8/28/2012 ENER 0.136 < 0.0300 0.0310 # Signifies Quality Control Sample A-101 -------------------

---

Table A.2-2 Water Quality of the North Irrigation (cont'd.)

Minor Constituents Sample Point pH Unat Mo Se N03 Ra226 Ra228 v Th230 Name Date Lab (std. units) (mg/I) (mg/I) (mg/I) (mg/I) (pCi/I) (pCi/I) (mg/I) (pCi/I) Irr 28 8/28/2012 ENER 0.134 < 0.0300 0.0300 9/5/2012 ENER 0.123 < 0.0300 0.0300 4.30 9/12/2012 ENER 0.158 0.0500 0.0380 4.20 9/18/2012 ENER 0.147 < 0.0300 0.0330 4.00 9/25/2012 ENER 0.132 < 0.0300 0.0340 4.40 10/2/2012 ENER 7.29 0.145 < 0.0300 0.0350 3.90 0.0800 0.100 < 0.0100 0.0500 10/11/2012 ENER 0.129 0.0300 0.0380 10/17/2012 ENER 0.131 < 0.0300 0.0440 4.40 10/24/2012 ENER 0.132 < 0.0300 0.0350 < 0.100 10/31/2012 ENER 0.133 < 0.0300 0.0380 4.50 A-102 TABLE A.2-3 WATER QUALITY FOR THE NORTH IRRIGATION SUPPLY WELLS Major Constituents Sample Point Ca Mg K Na HC03 C03 Cl 504 TDS Cond(calc.)

lon_B Name Date Lab (mg/I) (mg/I) (mg/I) (mg/I) (mg/I) (mg/I) (mg/I) (mg/I) (mg/I) (micromhos/ (ratio) 0634 3/19/1997 HMC 3/19/1997 HMC 3/19/1997 HMC 3/19/1997 HMC 3/19/1997 ENER 3/19/1997 ENER 8/5/1999 ENER 243 66.6 9.20 279 509 < 1.000 189 780 2080 9/12/2000 ENER 914 2090 9/20/2001 ENER 812 2040 10/9/2002 ENER 984 2330 1/5/2004 ENER 200 872 2000 *2654 4/23/2004 HMC 2740 9/14/2004 ENER 831 1890

• 2504 10/11/2005 ENER 858 2030

• 2694 10/3/2006 ENER 870 1910

• 2657 10/10/2007 ENER 827 1980

• 2630 8/24/2008 ENER 751 1660

• 2220 7/22/2009 ENER 734 1760

• 2330 5/18/2010 ENER 906 1960

• 2602 6/14/2010 ENER 157 838 1890

• 2546 4/26/2011 ENER 223 1200 2460

• 3373 7/5/2011 ENER 180 921 2030

• 2910 7/28/2011 ENER 184 941 2010

• 2220 10/12/2011 ENER 219 1080 2310

• 3115 4/12/2012 ENER 212 962 2210

• 2934 8/27/2012 ENER 234 1150 2490

• 3244 11/23/2013 ENER 910 2050

• 2718 7/29/2014 ENER 206 902 2060

• 2190 4/22/2015 ENER 199 865 2000

• 2644

• Signifies Specific Conductivity from HMC A-103 -------------------

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TABLE A.2-3 WATER QUALITY FOR THE NORTH IRRIGATION SUPPLY WELLS (cont'd.)*

Major Constituents Sample Point Ca Mg K Na HC03 C03 Cl 504 TDS Cond(calc.)

lon_B Name Date Lab (mg/I) (mg/I) (mg/I) (mg/I) (mg/I) (mg/I) (mg/I) (mg/I) (mg/I) (micromhos/ (ratio) 0634 5/5/2015 ENER 209 932 2020

• 2691 6/16/2015 ENER 200 887 2040

• 2662 8/19/2015 ENER 204 888 2000

• 2665 9/29/2015 ENER 209. 888 1980

• 2622 1/11/2016 ENER 203 839 1940 2/18/2016 ENER 179 746 1810 2489 4/5/2016 ENER 203 58.6 7.20 231 388 < 5.00 161 700 1660 7/23/2016 ENER 92.0 391 1860 2461 10/21/201°6 ENER 237 64.2 7.70 265 423 < 5.00 181 786 1820 2441 11/30/2016 ENER 167 777 1740 3/20/2017 ENER 162 695 1620 2168 0659 5/13/1997 HMC *5/13/1997 HMC 5/13/1997 HMC 5/13/1997 HMC 5/13/1997 ENER 5/13/1997 ENER 8/5/1999 ENER 244 66.4 9.40 278 500 < 1.000 198 791 2070 9/12/2000 ENER 893 2060 9/20/2001 ENER 806 2010 10/9/2002 ENER 800 2070 1/5/2004 ENER 211 859 1990

• 2617 9/14/2004 ENER 267 71.9 8.80 288 459 < 1.000 196 983 2070

• 2690 10/12/2005 ENER 243 67.3 7.90 286 479 < 1.000 179 811 1940 *2580 10/3/2006 ENER 252 65.7 8.00 292 451 < 1.000 160 859 2020

• 2793 10/10/2007 ENER 234 62.3 8.50 295 463 < 1.000 157 839 2050 *2674 10/1/2008 ENER 213 60.4 7.10 273 408 < 1.000 140 756 1700 .

• 2310 7/22/2009 ENER 223 59.7 7.10 278 431 < 1.000 169 766 1810 *2430 5/19/2010 ENER 245 67.8 7.60 288 469 < 5.00 174 916 1960

• 2603

• Signifies Specific Conductivity from HMC A-104 TABLE A.2-3 WATER QUALITY FOR THE NORTH IRRIGATION SUPPLY WELLS {cont'd.)

Major Constituents Sample Point Ca Mg K Na HC03 C03 Cl 504 TDS Cond(calc.)

lon_B Name Date Lab (mg/I) (mg/I) (mg/I) (mg/I) (mg/I) (mg/I) (mg/I) (mg/I) (mg/I) (micromhos/ (ratio) 0659 6/14/2010 ENER 164 872 1950

• 2591 4/26/2011 ENER 247 1340 2710

• 3641 7/5/2011 ENER 186 939 2020

• 2877 7/28/2011 ENER 190 952 2040

• 2204 10/12/2011 ENER 282 79.6 9.20 356 447 < 5.00 225 1060 2270

• 3078 4/12/2012 ENER 208 896 2110

• 2922 8/27/2012 ENER 195 796 2370

• 3170 4/22/2015 ENER 200 897 2060

• 2778 5/5/2015 ENER 213 945 2070

• 2761 6/16/2015 ENER 204 923 2090

• 2753 8/19/2015 ENER 200 855 1960

• 2660 9/29/2015 ENER 216 934 2040

• 2611 2/18/2016 ENER 201 886 2030 2715 2/23/2016 ENER 262 71.4 7.70 288 490 < 5.00 206 891 2050 4/5/2016 ENER 248 68.6 7.90 277 469 < 5.00 200 857 1990 7/23/2016 ENER 185 744 1950 2589 10/21/2016 ENER 252 68.1 8.10 286 475 < 5.00 196 838 1970 2622 3/20/2017 ENER 189 806 1860 2427 0881 8/4/1995 ENER 244 61.0 6.90 276 472 < 0.100 171 823 1886 12/5/1995 ENER 240 60.5 6.70 264 479 < 0.100 155 791 1895 2/29/1996 ENER 260 64.8 7.30 273 481 < 0.100 188 892 1890 10/25/1996 ENER 262 67.1 7.50 279 490 < 0.100 175 873 1980 3/13/1997 ENER 841 1960 8/18/1997 HMC 8/18/1997 HMC 8/18/1997 HMC 8/18/1997 HMC 8/19/1997 HMC 8/19/1997 HMC *Signifies Specific Conductivity from HMC A-105 -------------------

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TABLE A.2-3 WATER QUALITY FOR THE NORTH IRRIGATION SUPPLY WELLS (cont'd.)

' Major Constituents Sample Point Ca Mg K Na -HC03 C03 Cl 804 TDS Cond(calc.)

lon_B Name Date Lab (mg/I) (mg/I) (mg/I) (mg/I) (mg/I) (mg/I) (mg/I) (mg/I) (mg/I) (micromhos/

-(ratio) 0881 8/19/1997 HMC 8/19/1997 HMC 8/19/1997 HMC 8/19/1997 ENER 8/27/1997 ENER 288 68.6 7.70 297 477 < 0.100 189 951 2070 3/11/1998 ENER 862 2050 9/26/1998 ENER 259 67.8 7.30 271 508 < 1.000 177 833 2080 9/28/1999 ENER 892 2110 9/27/2000 ENER 675 2090 9/20/2001 ENER 819 2050 10/3/2002 ENER 871 2100 1/5/2004 ENER 207 856 2010 *2656 4/23/2004 HMC 2710 9/14/2004 ENER 897 2070

• 2738 5/17/2005 ENER 759 1910

• 2556 10/11/2005 ENER 186 772 1910

• 2578 10/2/2006 ENER 168 800 .1850

• 2683 10/10/2007 ENER 183 857 2040

• 2713 4/1/2008 ENER 972 1950

• 2614 8/24/2008 ENER 148 781 1780

• 2370 4/20/2009 ENER 857 1890

• 2550 5/19/2010 ENER 162 915 2000 *2629 2/9/2011 ENER 177 964 2170 *2820 4/26/2011 ENER 208 1140 2370

• 3197 5/11/2011 ENER 270 77.0 8.70 318 471 < 5.00 196 1030 2210

• 2918 7/11/2011 ENER 183 960 2110 *2739 7/28/2011 ENER 191 969 2080 *2246 10/12/2011 ENER -288 78.8 9.20 348 447 < 5.00 229 1060 2300

• 3065 3/13/2012 ENER 204 969 2270 *2950

• Signifies Specific Conductivity from HMC A-106 TABLE A.2-3 WATER QUALITY FOR THE NORTH IRRIGATION SUPPLY WELLS (cont'd.)

Major Constituents Sample Point Ca Mg K Na HC03 C03 Cl 804 TDS Cond(calc.)

lon_B Name Date Lab (mg/I) (mg/I) (mg/I) (mg/I) (mg/I) (mg/I) (mg/I) (mg/I) (mg/I) (micromhos/ (ratio) 0881 7/27/2012 ENER 281 80.4 8.30 333 461 < 5.00 222 1070 2190

• 2935 11/1/2012 ENER 307 89.4 9.60 392 478 < 5.00 276 1260 2740

• 3557 2/8/2013 HMC 226 1060 2370 3075 10/30/2013 ENER 272 7i.5 8.80 337 446 < 5.00 209 967 2120 2/11/2014 ENER 202 913 2040

• 2790 8/26/2014 ENER 266 72.1 8.10 300 462 < 5.00 207 960 2160

• 2804 2/26/2015 ENER 276 73.6 7.80 296 467 < 5.00 202 950 1750

• 2844 2/18/2016 ENER 273 73.5 8.20 304 500 < 5.00 204 935 2110 2862 2/23/2017 ENER 250 68.0 7.90 289 475 < 5.00 196 856 2000 2640 0886 8/14/1995 ENER 286 76.0 7.70 334 511 < 0.100 177 1056 2282 12/5/1995 ENER 279 73.9 7.20 311 505 < 0.100 155 1007 2274 2/29/1996 ENER 318 82.6 8.00 325 498 < 0.100 198 1185 2284 10/25/1996 ENER 291 78.1 7.70 331 482 < 0.100 177 1100 2300 3/13/1997 ENER 1000 2220 6/23/1997 ENER 181 1030 2290 7/1/1997 ENER 171 919 2050 7/11/1997 ENER 193 718 1680 7/21/1997 ENER 277 72.4 7.80 327 483 < 0.100 175 945 2360 8/5/1997 ENER 178 970 2210 8/12/1997 ENER 286 66.5 7.50 312 450 < 0.100 182 1008 2270 8/19/1997 ENER 172 1030 2230 8/26/1997 HMC 8/26/1997 HMC 8/26/1997 HMC 8/26/1997 HMC 8/26/1997 HMC 8/26/1997 HMC 8/26/1997 HMC 8/26/1997 HMC *Signifies Specific Conductivity from HMC A-107 -------------------

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TABLE A.2-3 WATER QUALITY FOR THE NORTH IRRIGATION SUPPLY WELLS (cont'd.)

Major Constituents Sample Point Ca Mg K Na HC03 C03 Cl 804 TDS Cond(calc.)

lon_B Name Date Lab (mg/I) (mg/I) (mg/I) (mg/I) (mg/I) (mg/I) (mg/I) (mg/I) (mg/I) (micromhos/ (ratio) 0886 8/26/1997 HMC 8/26/1997 HMC 8/26/1997 HMC 8/26/1997 HMC 8/26/1997 HMC 8/27/1997 HMC 8/27/1997 HMC 8/27/1997 HMC 8/27/1997 ENER 8/27/1997 ENER 9/10/1997 ENER 292 73.9 8.00 320 505 < 0.100 196 1030 2240 9/12/1997 ENER 302 75.5 8.10 322 484 < 0.100 203 1069 2250 9/15/1997 ENER 1020 2240

• 2820 9/19/1997 ENER 1040 2200

• 2850 9/29/1997 ENER 158 981 2090 10/6/1997 ENER 1040 2110 10/6/1997 HMC 2760 10/15/1997 ENER 179 1020 2200

• 2870 10/21/1997 ENER 178 841 2200

• 2820 10/29/1997 ENER 198 1060 2290

• 2900 3/11/1998 ENER 1050 2370 9/26/1998 ENER 294 79.5 7.50 314 489 < 1.000 180 1040 2420 9/28/1999 ENER 1110 2400 9/27/2000 ENER 824 2370 9/20/2001 ENER 1050 2440 10/9/2002 -ENER 1050 2480 1/5/2004 ENER 210 1190 2440

• 3086 4/23/2004 HMC 3080 9/14/2004 ENER 1090 2360

• 2996

• Signifies Specific Conductivity from HMC A-108 TABLE A.2-3 WATER QUALITY FOR THE NORTH IRRIGATION SUPPLY WELLS (cont'd.)

Major Constituents Sample Point Ca Mg K Na HC03 C03 Cl 504 TDS Cond(calc.)

lon_B Name Date Lab (mg/I) (mg/I) (mg/I) (mg/I) (mg/I) (mg/I) (mg/I) (mg/I) (mg/I) (micromhos/ (ratio) 0886 10/11/2005 ENER 935 2170 *2745 7/23/2006 ENER 181 1160 2390

• 2930 10/2/2006 ENER 1100 2250 *3085 10/10/2007 ENER 150 874 1900

• 2580 8/24/2008 ENER 717 1530

• 2090 6/3/2009 ENER 99.0 680 1440

• 869 7/23/2009 ENER 654 1510

• 2050 5/18/2010 ENER 110 701 1530

• 2085 2/9/2011 ENER 147 904 1930

• 2593 4/26/2011 ENER 159 898 1990

• 2747 5/11/2011 ENER 254 66.2 7.50 282 439 < 5.00 160 939 1980

• 2638 7/11/2011 ENER 162 953 2000

• 2666 10/12/2011 ENER 285 77.0 8.00 322 398 < 5.00 177 1050 2150

• 2797 3/13/2012 ENER 176 991 2230 *2864 7/27/2012 ENER 274 69.8 7.70 305 420 < 5.00 178 1020 2060

• 2745 11/1/2012 ENER 277 77.4 8.20 321 431 < 5.00 229 1060 2410

• 3068 2/8/2013 HMC 190 970 2140 2803 11/15/2013 ENER 198 48.9 7.20 325 529 < 5.00 178 684 1800 2/11/2014 ENER 167 751 1760

• 2414 10/16/2014 ENER 250 66.2 7.00 281 445 < 5.00 178 865 1980

• 2626 2/26/2015 ENER 250 66.8 7.10 278 429 < 5.00 179 863 1570

• 2600 2/18/2016 ENER 284 77.8 7.90 311 488 < 5.00 193 1030 2210 2908 7/7/2016 ENER 279 73.7 7.70 302 466 < 5.00 192 978 2100 2826 3/3/2017 ENER 2798 0890 8/25/1995 ENER 210 54.0 7.00 241 406 < 0.100 144 738 1653 12/11/1995 ENER 232 56.0 6.60 255 397 < 0.100 141 791 1800 3/4/1996 ENER 235 58.4 6.50 235 401 < 0.100 160 859 1809 10/25/1996 ENER 245 61.7 7.10 265 437 < 0.100 161 843 1860 3/13/1997 ENER 825 1870

• Signifies Specific Conductivity from HMC A-109 -------------------

,..---------------------------------------------------------------TABLE A.2-3 WATER QUALITY FOR THE NORTH IRRIGATION SUPPLY WELLS (cont'd.)

Major Constituents Sample Point Ca Mg K Na HC03 C03 Cl 504 TDS Cond(calc.)

lon_B Name Date Lab (mg/I) (mg/I) (mg/I) (mg/I) (mg/I) (mg/I) * (mg/I) (mg/I) (mg/I) (micromhos/ (ratio) 0890 8/27/1997 ENER 266 63.5 7.40 274 443 < 0.100 179 876 1920 8/28/1997 HMC 9/2/1997 HMC 9/2/1997 HMC 9/2/1997 HMC 9/2/1997 HMC 9/2/1997 HMC 9/2/1997 HMC 9/2/1997 HMC 9/2/1997 HMC 9/3/1997 HMC 9/3/1997 ENER 9/3/1997 ENER 3/11/1998 ENER 808 1930 9/25/1998 ENER 240 61.7 6.90 254 460 < 1.000 165 782 2000 3/10/1999 ENER 256 64.4 8.40 264 472 < 1.000 187 863 1960 3/11/1999 ENER 259 65.5 8.50 269 474 < 1.000 185 875 2000 9/28/1999 ENER 837 1990 ---912712000 ENER 647 2010 9/20/2001 ENER 798 1970 10/9/2002 ENER 734 1920 1/5/2004 ENER 199 839 1930 *2563 4/23/2004 HMC 2520 9/14/2004 ENER 173 818 1860 *2464 10/11/2005 ENER 161 772 1890

• 2507 7/23/2006 ENER 170 861 1780

• 2410 10/3/2006 ENER 139 710 1790 *2485 10/10/2007 ENER 183 776 1870

• 2582 8/20/2008 ENER 164 802 1790 *2300

• Signifies Specific Conductivity from HMC A -110 TABLE A.2-3 WATER QUALITY FOR THE NORTH IRRIGATION SUPPLY WELLS (cont'd.)

Major Constituents Sample Point Ca Mg K Na HC03 C03 Cl 504 TDS Cond(calc.)

• lon_B Name Date Lab (mg/I) (mg/I) (mg/I) (mg/I) (mg/I) (mg/I) (mg/I) (mg/I) (mg/I) (micromhos/ (ratio) 0890 7/22/2009 ENER 174 787 1890

• 2460 . 5/18/2010 ENER 176 870 1950

• 2633 6/14/2010 ENER 177 850 1960

• 2626 4/26/2011 ENER 212 1060 2260 . .* 3190 7/5/2011 ENER 187 861 1960

• 2848 7/28/2011 ENER 190 863 1950

• 2168 10/12/2011 ENER 224 1060 2270

• 3066 4/12/2012 ENER 214 969 2200*

• 2973 8/27/2012 ENER 238 1090 2420

• 3159 4/30/2013 ENER 226 949 2250

• 3014 7/29/2014 ENER 205 859 1980

• 2110 4/22/2015 ENER 193 796 1890 *2490 5/5/2015 ENER 207 844 1900

• 2566 6/16/2015 ENER 195 812 1870

• 2500 8/19/2015 ENER 198 807 1880 *2494 9/29/2015 ENER 204 821 1890

• 2421 1/11/2016 ENER 167 670 1610 2/18/2016 ENER 170 675 1660 2315 4/5/2016 ENER 166 47.6 6.10 191 334 < 5.00 135 549 1360 7/23/2016 ENER 167 670 1880 2226 10/21/2016 ENER 196 55.1 7.00 210 338 < 5.00 151 654 1550 2108 0951R 10/29/1997 ENER 4/24/2012 ENER 147 536 1410 6/11/2012 ENER 139 520 1380

• 1973 8/16/2012 ENER 182 61.3 9.20 167 438 < 5.00 156 548 1490

• 2027 8/27/2012 ENER 156 " 555 1420 *2045 3/6/2013 ENER 205 67.3 . 9.60 195 425 < 5.00 169 581 1490

• 2107 12/18/2014 ENER 172 599 1530

• 2120 "le 2/17/2015 ENER 171 582 1510

• 2107

• Signifies Specific Conductivity from HMC A-111 -------------------

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TABLE A.2-3 WATER QUALITY FOR THE NORTH IRRIGATION SUPPLY WELLS (cont'd.)

Major Constituents Sample Point Ca Mg K Na HC03 C03 Cl 504 TDS Cond(calc.)

lon_B Name Date Lab (mg/I) (mg/I) (mg/I) (mgn) (mg/I) (mg/I) (mg/I) (mg/I) (mg/I) (micromhos/ (ratio) M9 3/3/2015 ENER 220 1280 2670

• 3331 6/11/2015 ENER 339 85.6 6.10 390 517 < 5.00 225 1290 2710

• 3378 10/1/2015 ENER 214 1420 2780

• 3545 3/16/2016 ENER 239 1330 2570 3282 M16 9/19/2006 ENER 399 105 9.10 340 411 < 1.000 191 1450 3000

• 3756 10/10/2007 ENER 200 1330 2800

• 3412 8/28/2008 ENER 195 1430 2780

• 3410 4/3/2009 ENER 203 1400 2850 *3466 712212009 ENER 374 94.9 8.50 374 444 < 1.000 195 1360 2770 *3420 5/18/2010 ENER 221 1470 2830 *3474 10/1/2015 ENER 225 1280 2570

• 3201 MO 7nt1995 ENER . 411 96.0 7.30 393 372 < 0.100 128 1626 3153 12/4/1995 ENER 399 98.0 7.10 376 362 < 0.100 116 1642 3119 6/24/1996 ENER 1755 3270 8/22/1996 ENER 1160 2540 12/20/1996 ENER 915 2350 3/12/1997 ENER 935 2190 10/21/1997 ENER 329 83.1 7.90 355 386 < 0.100 171 1350 2600 1/20/1998 ENER 1270 2530 1/20/1998 ENER # 1270 # 2520 7/21/1998 ENER 306 76.8 7.60 345 418 < 1.000 180 1200 2720 1/19/1999 ENER 1260 2550 1/19/1999 ENER # 1300 # 2580 7/21/1999 ACZ # 312 # 82.3 # 7.70 # 352 # 400 # < 2.00 # 190 # 1220 # 2630 7/21/1999 ENER 280 72.7 9.70 316 478 < 1.000 188 1020 2490 7/21/1999 ENER # 286 # 74.8 # 9.70 # 325 # 477 # < 1.000 # 191 # 1020 # 2490 1/27/2000 ENER 1180 2480 1/27/2000 ENER # 1160 # 2480 # Signifies Quality Control Sample

• Signifies Specific Conductivity from HMC A-113 -------------------

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TABLE A.2-3 WATER QUALITY FOR THE NORTH IRRIGATION SUPPLY WELLS (cont'd.)

Major Constituents Sample Point Ca Mg K Na HC03 C03 Cl 504 TDS Cond(calc.)

lon_B Name Date Lab (mg/I) (mg/I) (mg/I) (mg/I) (mg/I) (mg/I) (mg/I) (mg/I) (mg/I) (micromhos/ (ratio) MO 7/18/2000 ENER 299 76.9 7.47 304 493 < 1.000 185 1020 2510 91612000 HMC 9/6/2000 HMC 9/7/2000 HMC 91712000 HMC 9/7/2000 HMC 9/7/2000 HMC 9/11/2000 HMC 9/11/2000 HMC 9/12/2000 HMC 9/12/2000 HMC 9/12/2000 HMC 9/12/2000 HMC 9/20/2000 HMC 9/20/2000 ENER 3/12/2001 ENER 1090 2210 10/9/2001 ENER 911 2380 3/20/2002 ENER 1180 2460 3/20/2002 ENER # 1190 # 2460 10/14/2002 ENER 1050 2460 3/10/2003 ENER 1140 2530 3/10/2003 ENER # 1100 # 2520 10/13/2003 ENER 204 1190 2530

• 3127 3/11/2004 ENER 1210 2600

• 3198 10/13/2004 ENER 1220 2650

• 3260 3/14/2005 ENER 1380 2710

• 3341 10/11/2005 ENER 180 1280 2680

• 3326 3/2/2006 ENER ---1410 2910

• 3585 712012006 ENER 318 85.7 8.90 356 403 < 1.000 181 1210 2580

• 3270 # Signifies Quality Control Sample

• Signifies Specific Conductivity from HMC A-114 TABLE A.2-3 WATER QUALITY FOR THE NORTH IRRIGATION SUPPLY WELLS (cont'd.)

Major Constituents Sample Point Ca Mg K Na HC03 C03 Cl 504 TDS Cond(calc.)

lon_B Name Date Lab (mg/I) (mg/I) (mg/I) (mg/I) (mg/I) (mg/I) (mg/I) (mg/I) (mg/I) (micromhos/ (ratio) MO 10/2/2006 ENER 162 1470 2820

• 3660 3/8/2007 ENER 1440 2880 *3446 10/10/2007 ENER 198 1360 2870

• 3513 3/10/2008 ENER 1300 2420

• 3253 8/28/2008 ENER 168 1390 2640

• 1310 3/4/2009 ENER 1230 2430

• 3110 7/22/2009 ENER 186 1460 2970

• 3500 3/8/2010 ENER 1460 2740

• 3560 5/18/2010 ENER 184 1440 2870

• 3558 3/15/2011 ENER 996 2180

• 2839 10/10/2011 ENER 190 1020 2180

• 2833 10/2/2012 ENER 219 986 2170

• 2850 10/2/2012 ENER # 216 # 966 # 2160 3/4/2013 ENER 926 2170

• 2936 11/1/2013 ENER 213 917 2100

• 2822 3/19/2014 ENER 850 1980

• 2691 3/12/2015 ENER 1220 2550

• 3164 10/15/2015 ENER 224 1450 2660

• 3291 3/15/2016 ENER 1380 2650 3346 10/26/2016 ENER 208 1390 2640 3303 3/17/2017 ENER 1370 2700 3268 MQ 6/29/1995 ENER 278 76.0 6.40 373 404 < 0.100 174 1289 2680 5/15/1996 ENER 1288 2769 9/11/1996 ENER 280 80.0 8.10 369 459 < 0.100 181 1170 2580 12/20/1996 ENER 1110 2560 3/12/1997 ENER 1291 2730 10/21/1997 ENER 415 126 9.80 364 512 < 0.100 223 1500 3090 3/4/1998 ENER 1500 3020 10/22/1998 ENER 356 103 9.30 334 538 < 1.000 191 1200 2860 #Signifies Quality Control Sample

• Signifies Specific Conductivity from HMC A-115 -------------------

---

TABLE A.2-3 WATER QUALITY FOR THE NORTH IRRIGATION SUPPLY WELLS (cont'd.)

Major Constituents Sample Point Ca Mg K Na HC03 C03 Cl 504 TDS Cond(calc.)

lon_B Name Date Lab (mg/I) (mg/I) (mg/I) (mg/I) (mg/I) (mg/I) (mg/I) (mg/I) (mg/I) (micromhos/ (ratio) MQ 10/20/1999 ENER 1160 2530 9/20/2000 HMC 9/20/2000 HMC 9/20/2000 HMC 9/20/2000 HMC 9/20/2000 HMC 9/26/2000 HMC 9/26/2000 HMC 9/26/2000 HMC 9/26/2000 ENER 11/1/2000 ENER 1440 2730 10/22/2001 ENER 1180 2940 10/17/2002 ENER 1270 2850 1/12/2004 ENER 203 1420 2820

• 3471 10/15/2004 ENER 199 1370 2830

• 3514 4/12/2005 ENER 209 1270 2690

• 3387 9/26/2005 ENER 175 994 2290

• 3036 2/21/2006 ENER 183 1240 2520

• 3340 7/23/2006 ENER 190 1180 2410

• 3610 5/30/2007 ENER 206 1140 2590

• 3277 9/17/2007 ENER 190 1230 2380

• 3220 3/5/2008 ENER 197 1350 2630

• 3380 9/22/2009 ENER 205 1280 2580

• 3342 9/22/2010 ENER 211 1380 2820

• 3467 2/22/2011 ENER 212 1370 2690

• 3408 8/2/2011 ENER 339 85.4 7.30 388 442 < 5.00 210 1310 2540

• 3309 7/18/2012 ENER 378 93.0 8.50 382 464 < 5.00 209 1320 2770

• 3401 2/20/2013 ENER 206 1300 2780

• 3417 11 /23/2013 ENER 227 1390 . 2930

• 3584

• Signifies Specific Conductivity from HMC A-116 TABLE A.2-3 WATER QUALITY FOR THE NORTH IRRIGATION SUPPLY WELLS (cont'd.)

Major Constituents Sample Point Ca Mg K Na HC03 C03 Cl 504 TDS Cond{calc.)

lon_B Name Date Lab (mg/I) (mg/I) (mg/I) (mg/I) (mg/I) (mg/I) (mg/I) (mg/I) (mg/I) (micromhos/ (ratio) MQ 9/29/2014 ENER 234 1380 2710

• 3360 3/3/2015 ENER 217 1230 2580

• 3315 6/11/2015 ENER 348 86.6 7.70 354 481 < 5.00 227 1250 2650

• 3260 10/1/2015 ENER 234 1300 2640

• 3260 3/16/2016 ENER 226 1180 2430 3154 3/24/2017 ENER 207 1120 2330 3113 MR 7/14/1995 ENER 275 69.0 7.20 294 536 < 0.100 173 854 2077 12/4/1995 ENER 275 71.2 7.20 284 517 < 0.100 171 907 2090 8/22/1996 ENER 931 2190 12/20/1996 ENER 939 2190 3/12/1997 ENER 886 2130 10/21/1997 ENER 300 77.5 8.10 323 508 < 0.100 197 1040 2270 3/4/1998 ENER 1070 2320 10/22/1998 ENER 296 82.4 8.40 330 507 < 1.000 179 1000 2440 10/20/1999 ENER 1060 2380 9/26/2000 HMC 9/26/2000 HMC 9/26/2000 HMC 9/26/2000 HMC 9/26/2000 HMC 912612000 HMC 9/26/2000 HMC 9/26/2000 HMC ---9/27/2000 ENER 11/1/2000 ENER 1180 2370 10/22/2001 ENER 900 2370 11/11/2002 ENER 977 2380 1/19/2004 ENER 191 1080 2390

• 3005 11/10/2004 ENER 166 992 2390 *2994

• Signifies Specific Conductivity from HMC A-117 -------------------

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TABLE A.2-3 WATER QUALITY FOR THE NORTH IRRIGATION SUPPLY WELLS (cont'd.)

Major Constituents Sample Point Ca Mg K Na HC03 C03 Cl 504 TDS Cond(calc.)

lon_B Name Date Lab (mg/I) (mg/I) (mg/I) (mg/I) (mg/I) (mg/I) (mg/I) (mg/I) (mg/I) (micromhos/ (ratio) MR 4/11/2005 ENER 983 2210

• 2880 10/11/2005 ENER 196 801 1990

• 2664 4/10/2006 ENER 933 2080

• 3010 4/30/2007 ENER 1140 2500

• 3135 10/10/2007 ENER 189 1080 2460

• 3135 3/3/2009 ENER 1020 1960

• 2695 7/22/2009 ENER 159 968 2180

• 2750 3/10/2015 ENER 1050 2310

• 3007 4/14/2015 ENER 1000 2280

• 3000 8/7/2015 ENER 302 78.4 8.50 306 472 < 5.00 207 1120 2340

• 3001 3/15/2016 ENER 1110 2290 3015 9/8/2016 ENER 217 1100 2240 2865 3/20/2017 ENER 1010 2170 2914 MS 7/10/1995 ENER 249 64.0 7.80 266 567 < 0.100 181 679 1845 12/4/1995 ENER 239 65.4 7.60 250 583 < 0.100 173 670 1825 8/22/1996 ENER 835 2120 12/20/1996 ENER 808 2160 3/12/1997 ENER 787 1950 10/21/1997 ENER 263 72.1 8.60 281 544 < 0.100 206 823 2010 3/4/1998 ENER 779 1960 10/22/1998 ENER 238 69.6 8.70 269 552 < 1.000 187 705 1950 10/20/1999 ENER 720 1900 9/27/2000 HMC 9/27/2000 HMC 9/27/2000 HMC 9/27/2000 HMC 9/27/2000 HMC 9/27/2000 HMC 9/27/2000 HMC

• Signifies Specific Conductivity from HMC A-118 TABLE A.2-3 WATER QUALITY FOR THE NORTH IRRIGATION SUPPLY WELLS (cont'd.)

Major Constituents Sample Point Ca Mg K Na HC03 C03 Cl 504 TDS Cond(calc.)

lon_B Name Date Lab (mg/I) (mg/I) (mg/I) (mg/I) (mg/I) (mg/I) (mg/I) (mg/I) (mg/I) (micromhos/ (ratio) MS 9/28/2000 HMC ' 11/1/2000 ENER 810 1890 10/22/2001 ENER 616 1890 11/11/2002 ENER 677 1890 1/19/2004 ENER 193 725 1880

• 2509 11/10/2004 ENER 210 702 1890

• 2511 10/11/2005 ENER 176 629 1820

• 2432 10/2/2006 ENER 176 717 1790

• 2602 10/10/2007 ENER 201 664 1790

• 2477 8/28/2008 ENER 189 767 1820

• 2530 712212009 ENER 186 698 1820 *2450 6/8/2011 ENER 198 956 2130 *2804 7/5/2011 ENER 189 835 1920

• 2716 7/28/2011 ENER 189 748 1740

• 2060 10/12/2011 ENER 189 760 1850 *2554 4/12/2012 ENER 182 712 1810

• 2512 8/27/2012 ENER 195 799 1940 *2623 4/30/2013 ENER 193 820 2040 *2753 11/23/2013 ENER 206 954 2170

• 2909 6/30/2016 ENER 232 59.1 8.20 242 512 < 5.00 193 683 1840 2510 3/29/2017 ENER 188 685 1770 2445.

• Signifies Specific Conductivity from HMC A-119 -------------------

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-TABLE A.2-4 WATER QUAUTY FOR THE NORTH IRRIGATION SUPPLY WELLS Minor Constituents Sample Point pH Unat Mo Se N03 Ra226 Ra228 v Th230 Name Date Lab (std. units) (mg/I) (mg/I) (mg/I) (mg/I) (pCi/I) (pCi/I) * (mg/I) (pCi/I) 0634 8/5/1999 ENER 7.93 0.313 < 0.0300 0.0580 2.55 < 0.200 < 1.000 < 0.0100 < 0.200 9/12/2000 ENER ---0.302 ---0.0590 3.91 9/20/2001 ENER ---0.217 ---0.0560 3.20 10/9/2002 ENER ---0.396 ---0.113 7.10 1/5/2004 ENER ---0.223 < 0.0300 0.0520 3.54 9/14/2004 ENER ---0.154 ---0.0470 3.03 10/11/2005 ENER ---0.266 ---0.0600 4.80 10/3/2006 ENER ---0.226 ---0.0750 5.30 10/10/2007 ENER ---0.279 ---0.0810 6.00 8/24/2008 ENER ---0.215 ---0.0470 5.20 7/22/2009 ENER ---0.202 ---0.0480 5.10 5/18/2010 ENER ---0.426 ---0.0650 6.30 6/14/2010 ENER ---0.421 0.0400 0.0610 5.70 4/26/2011 ENER ---0.373 0.0400 0.0900 7/5/2011 ENER 7.93 0.336 < 0.0300 0.0730 5.20 7/28/2011 ENER ---0.379 0.0500 0.0630 10/12/2011 ENER ---0.273 0.0300 0.0750 5.30 4/12/2012 ENER ---0.305 0.0300 0.0940 8/27/2012 ENER ---0.339 0.0400 0.0740 11/23/2013 ENER ---0.258 ---0.105 5.10 7/29/2014 ENER ---0.254 < 0.0300 0.0520 4/22/2015 ENER ---0.230 < 0.0300 0.0500 5/5/2015 ENER ---0.265 < 0.0300 0.0500 6/16/2015 ENER ---0.235 < 0.0300 0.0460 8/19/2015 ENER ---0.246 < 0.0300 0.0430 9/29/2015 ENER ---0.254 < 0.0300 0.0460 1/11/2016 ENER ---0.224 0.0400 0.0430 2/18/2016 ENER ---0.186 < 0.0300 0.0330 4/5/2016 ENER 7.50 0.192 < 0.0300 0.0410 2.80 6.70 0.500 < 0.0100 0.200 A-120 TABLE A.2-4 WATER QUALITY FOR THE NORTH IRRIGATION SUPPLY WELLS (cont'd.)

Minor Constituents Sample Point pH Unat Mo Se N03 Ra226 Ra228 v Th230 Name Date Lab (std. units) (mg/I) (mg/I) (mg/I) (mg/I) (pCi/I) (pCi/I) (mg/I) (pCi/I) 0634 7/23/2016 ENER 0.215 < 0.0300 0.0410 10/21/2016 ENER 7.68 0.187 < 0.0400 0.0360 2.70 0.130 1.20 < 0.0100 -0.0400 11/30/2016 ENER 0.145 < 0.0300 0.0340 3/20/2017 ENER 0.155 < 0.0300 0.0280 0659 8/5/1999 ENER 7.93 0.301 < 0.0300 . 0.0610 3.44 < 0.200 < 1.000 < 0.0100 < 0.200 9/12/2000 ENER 0.275 0.0549 3.46 9/20/2001 ENER 0.200 0.0510 3.20 10/9/2002 ENER 0.234 0.0730 3.90 1/5/2004 ENER 0.216 < 0.0300 0.0470 3.28 9/14/2004 ENER 7.19 0.186 < 0.0300 0.0540 3.27 < 0.200 < 1.000 < 0.0100 < 0.200 10/12/2005 ENER 7.72 0.168 < 0.0300 0.0390 3.00 < 0.200 < 1.000 < 0.0100 < 0.200 10/3/2006 ENER 7.47 0.278 < 0.0300 0.0760 5.50 < 0.200 < 1.000 < 0.0100 < 0.200 10/10/2007 ENER 7.60 0.286 < 0.0300 0.0820 5.80 < 0.200 < 1.000 < 0.0100 < 0.200 10/1/2008 ENER 7.62 0.218 < 0.0300 0.0480 5.00 0.340 -0.100 < 0.0100 -0.300 7/22/2009 ENER 7.82 0.251 < 0.0300 0.0510 4.40 -0.200 1.50 < 0.0100 -0.0200 5/19/2010 ENER 7.82 0.415 0.0400 0.0650 5.80 -0.0500 0.200 < 0.0100 0.0600 6/14/2010 ENER 0.450 0.0400 0.0620 5.60 4/26/201.1 ENER 0.342 0.0400 0.0990 7/5/2011 ENER 8.00 0.351 0.0400 0.0700 4.70 7/28/2011 ENER 0.388 0.0500 0.0660 10/12/2011 ENER 7.88 0.271 0.0300 0.0710 5.70 0.410 -0.200 < 0.0100 0.200 4/12/2012 ENER 0.202 < 0.0300 0.0800 8/27/2012 ENER 0.319 0.0300 0.0720 4/22/2015 ENER 0.267 < 0.0300 0.0600 5/5/2015 ENER 0.296 < 0.0300 0.0530 6/16/2015 ENER 0.276 < 0.0300 0.0560 8/19/2015 ENER 0.269 < 0.0300 0.0490 9/29/2015 ENER 0.278 < 0.0300 0.0500 2/18/2016 ENER 0:257 < 0.0300 0.0480 A -121 -------------------

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TABLE A.2-4 WATER QUALITY FOR THE NORTH IRRIGATION SUPPLY WELLS (cont'd.)

Minor Constituents Sample Point pH Unat Mo Se N03 Ra226 Ra228 v Th230 Name Date Lab (std. units) (mg/I) (mg/I) (mg/I) (mg/I) (pCi/I) (pCi/I) (mg/I) (pCi/I) 0659 2/23/2016 ENER 7.45 0.253 0.0400 0.0460 3.60 0.0400 0.700 < 0.0100 -0.0010 4/5/2016 ENER 7.39 0.248 < 0.0300 0.0480 3.10 0.120 -0.300 < 0.0100 0.0300 7/23/2016 ENER 0.224 0.0300 0.0450 10/21/2016 ENER 7.72 0.208 < 0.0400 0.0390 2.70 0.0800 1.000 < 0.0100 0.0300 3/20/2017 ENER 0.194 < 0.0300 0.0370 0881 8/4/1995 ENER 7.84 0.173 < 0.0300 0.0570 2.80 < 0.200 1.000 < 0.0100 < 0.200 12/5/1995 ENER 7.59 0.165 < 0.0300 0.0450 2.69 < 0.200 2.00 < 0.0100 < 0.200 2/29/1996 ENER 7.89 0.170 . < 0.0300 0.0510 2.74 < 0.200 10/25/1996 ENER 8.12 0.250 < 0.0300 0.0780 3.52 0.400 <.1.000 < 0.0100 < 0.200 3/13/1997 ENER 0.311 0.0700 8/27/1997 ENER 7.92 0.253 < 0.0300 0.0630 3.63 < 0.200 3/11/1998 ENER 0.393 0.0870 9/26/1998 ENER 7.88 0.350 < 0.0300 0.0860 4.19 0.300 9/28/1999 ENER 0.426 0.0710 4.04 9/27/2000 ENER 0.341 0.0820 4.07 9/20/2001 ENER 0.237 0.0610 3.40 10/3/2002 ENER 0.242 0.0720 4.15 1/5/2004 ENER 0.227 < 0.0300 0.0490 3.66 9/14/2004 ENER 0.214 0.0540 3.26 5/17/2005 ENER 0.190 < 0.0300 0.0360 10/11/2005 ENER 0.170 < 0.0300 0.0390 2.70 10/2/2006 ENER 0.192 < 0.0300 0.0440 3.20 10/10/2007 ENER 0.347 < 0.0300 0.0960 6.60 4/1/2008 ENER 0.435 0.0400 0.0860 8/24/2008 ENER 0.276 0.0300 . 0.0580 5.70 4/20/2009 ENER 0.412 0.0500 0.0640 5/19/2010 ENER 0.482 0.0600 0.0690 6.50 2/9/2011 ENER 0.400 0.0400 0.0790 4/26/2011 ENER 0.417 0.0400 0.0880 A-122 (

TABLE A.2-4 WATER QUALITY FOR THE NORTH IRRIGATION SUPPLY WELLS (cont'd.)

Minor Constituents Sample Point pH Unat Mo Se N03 Ra226 Ra228 v Th230 Name Date Lab (std. units) (mg/I) (mg/I) (mg/I) (mg/I) (pCi/I) (pCi/I) (mg/I) (pCi/I) 0881 5/11/2011 ENER 7.59 0.463 0.0500 0.0790 6.00 0.0900 7/11/2011 ENER 0.394 0.0500 0.0710 5.00 7/28/2011 ENER 0.433 0.0600 0.0710 10/12/2011 ENER 7.82 0.297 0.0400 0.0780 9.30 6.80 3/13/2012 ENER 0.403 0.0500 0.0790 7/27/2012 ENER 7.40 0.373 0.0400 0.0820 . 6.00 0.0500 0.900 0.0100 0 11/1/2012 ENER 7.35 0.320 0.0400 Q.0920 7.00 -0.100 1.10 < 0.0100 0.0090 2/8/2013 HMC 0.370 0.0500 0.0960 10/30/2013 ENER 7.28 0.340 < 0.0300 0.0680 5.20 1.10 2/11/2014 ENER 0.279 < 0.0300 0.0580 8/26/2014 ENER 7.53 0.325 0.0400 0.0560 4.80 0.210 2/26/2015 ENER 7.46 0.347 0.0300 0.140 5.10 0.230 2/18/2016 ENER 7.38 0.308 0.0300 0.0420 7.90 0.0600 2.40 < 0.0100 0.200 2/23/2017 ENER 7.36 0.229 < 0.0300 0.0390 2.80 0.0001 0.0005 < 0.0100 0.0000 0886 8/14/1995 ENER 7.80 0.471 < 0.0300 0.0870 6.30 0.300 1.30 < 0.0100 < 0.200 12/5/1995 ENER 7.61 0.466 < 0.0300 0.0940 4.28 < 0.200 2.00 < 0.0100 < 0.200 2/29/1996 ENER 7.93 0.477 < 0.0900 0.118 6.78 < 0.200 10/25/1996 ENER 8.06 0.478 < 0.0300 0.126 6.34 0.600 < 1.000 < 0.0100 < 0.200 3/13/1997 ENER 0.583 0.0930 6/23/1997 ENER 0.543 0.0930 7/1/1997 ENER 0.347 0.0820 7/11/1997 ENER 0.0410 < 0.0300 0.0970 7/21/1997 ENER 8.17 0.505 < 0.0300 0.0840 5.23 < 0.200 --8/5/1997 ENER 0.369 0.0700 0.0850 8/12/1997 ENER 7.79 0.350 < 0.0300 0.0670 4.34 0.500 8/19/1997 ENER 0.468 0.0750 9/10/1997 ENER 7.92 0.478 < 0.0300 0.0960 5.69 < 0.200 9/12/1997 ENER 7.97 0.457 0.0400 0.0930 5.76 < 0.200 9/15/1997 HMC 7.40

• 0.370

• 0.0820

• Signifies Specific Conductivity from HMC A-123 -------------------

---

'------------TABLE A.2-4 WATER QUALITY FOR THE NORTH IRRIGATION SUPPLY WELLS (cont'd.)

Minor Constituents Sample Point pH Unat Mo Se N03 Ra226 Ra228 v Th230 Name *Date Lab (std. units) (mg/I) (mg/I) (mg/I) (mg/I) (pCi/I) (pCi/I) (mg/I) (pCi/I) 0886 9/19/1997 HMC 7.80

• 0.360 ---* 0.129 9/29/1997 ENER ---0.286 ---0.0730 10/6/1997 ENER 7.79 0.311 ---0.0810 10/15/1997 ENER 7.86 0.387 ---0.0800 10/2111997 ENER 7.99 0.369 ---0.0800 10/29/1997 ENER 7.80 0.490 ---0.0890 3/11/1998 ENER ---0.614 ---0.113 9/26/1998 ENER 7.89 0.611 0.0400 0.127 7.68 0.400 9/28/1999 ENER ---0.693 ---0.112 7.52 9/27/2000 ENER ---0.595 ---0.111 8.22 9/20/2001 ENER ---0.484 ---0.148 8.30 10/9/2002 ENER ---0.495 ---0.133 8.70 1/5/2004 ENER ---0.542 0.0400 0.130 9.26 9/14/2004 ENER ---0.493 ---0.104 7.02 10/11/2005 ENER ---0.408 ---0.0810 6.10 7/23/2006 ENER ---0.607 0.0800 0.129 8.60 10/2/2006 ENER ---0.508 ---0.117 9.00 10/10/2007.

ENER ---0.396 0.0300 0.102 8.30 8/24/2008 ENER ---0.244 ---0.0490 6.60 6/3/2009 ENER ---0.318 0.0300 0.0520 7.30 7/23/2009 ENER ---0.238 ---0.0460 5.20 5/18/2010 ENER ---0.294 0.0400 0.0410 5.80 2/9/2011 ENER ---0.353 0.0500 0.0590 4/26/2011 ENER ---0.398 0.0500 0.0680 5/11/2011 ENER 7.64 0.428 0.0400 0.0640 6.00 0.0700 7/11/2011 ENER ---0.397 0.0500 0.0630 5.70 10/12/2011 ENER 7.90 0.409 0.0500 0.0750 5.70 1.40 3/13/2012 ENER --0.433 0.0600 0.0750 7/27/2012 ENER 7.45 0.324 0.0300 0.0680 5.00 -0.100 0.0100 < 0.0100 0.0100

• Signifies Specific Conductivity from HMC A-124 TABLE A.2-4 WATER QUALITY FOR THE NORTH IRRIGATION SUPPLY WELLS (cont'd.)

Minor Constituents Sample Point pH Unat Mo Se N03 Ra226 Ra228 v Th230 Name Date Lab (std. units) (mg/I) (mg/I) (mg/I) (mg/I) (pCi/I) (pCi/I) (mg/I) (pCi/I) 0886 11/1/2012 ENER 7.33 0.352 0.0400 0.0890 7.00 0.110 1.80 < 0.0100 0.0600 2/8/2013 HMC 0.306 < 0.0300 0.0870 11 /15/2013 ENER 7.49 0.628 < 0.0300 0.0370 2.60 1.80 2/11/2014 ENER 0.156 < 0.0300 0.0340 10/16/2014 ENER 7.52 0.215 < 0.0300 0.0600 4.50 0.570 2/26/2015 ENER 7.51 0.229 0.0300 0.0370 4.40 0.160 2/18/2016 ENER 7.43 0.316 < 0.0300 0.0570 5.40 0.130 1.10 < 0.0100 0.0700 7/7/2016 ENER 7.55 0.320 < 0.0300 .0.0540 4.70 0.680 1.20 < 0.0100 -0.0300 0890 8/25/1995 ENER 8.14 0.101 < 0.0300 0.0370 2.26 0.300 < 1.000 < 0.0100 < 0.200 12/11/1995 ENER 7.89 0.133 < 0.0300 0.0450 2.65 0.200 < 1.000 < 0.0100 < 0.200 3/4/1996 ENER 7.99 0.109 < 0.0300 0.0460 2.72 < 0.200 10/25/1996 ENER 8.08 0'.145 < 0.0300 0.0640 3.07 0.600 < 1.000 < 0.0100 < 0.200 3/13/1997 ENER 0.214 0.0590 8/27/1997 ENER 7.91 0.168 < 0.0300 0.0540 2.70 < 0.200 3/11/1998 ENER 0.265 0.0770 9/25/1998 ENER 7.71 0.242 < 0.0300 0.0600 3.40 < 0.200 3/10/1999 ENER 7.78 0.250 < 0.0300 0.0630 3.13 0.700 < 1.000 < 0.0100 < 0.200 3/11/1999 ENER 8.04 . 0.254 < 0.0300 0.0550 < 0.100 0.200 < 1.000 < 0.0100 < 0.200 9/28/1999 ENER 0.274 0.0550 3.27 9/27/2000 ENER 0.226 0.0510 2.95 9/20/2001 ENER 0.165 0.0450 2.70 10/9/2002 ENER 0.132 0.0460 2.70 1/5/2004 ENER 0.161 < 0.0300 -0.0420 2.90 9/14/2004 ENER 0.145 < 0.0300 0.0430 10/11/2005 ENER 0.155 < 0.0300 0.0420 3.40 7/23/2006 ENER 0.156 < 0.0300 0.0520 3.50 10/3/2006 ENER 0.151 < 0.0300 0.0510 3.20 10/10/2007 ENER 0.203 < 0.0300 0.0620 . 4.20 8/20/2008 ENER 0.196 < 0.0300 0.0530 3.97 A-125 -------------------

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TABLE A.2-4 WATER QUALITY FOR THE NORTH IRRIGATION SUPPLY WELLS (cont'd.)

Minor Constituents Sample Point pH Unat Mo Se N03 Ra226 Ra228 v Th230 Name Date Lab (std. units) (mg/I) (mg/I) (mg/I) (mg/I) (pCi/I) (pCi/I) (mg/I) (pCi/I) 0890 7/22/2009 ENER 0.179 < 0.0300 0.0470 3.82 5/18/2010 ENER 0.324 < 0.0300 0.0580 5.10 6/14/2010 ENER 0.340 < 0.0300 0.0560 4.70 4/26/2011 ENER 0.281 < 0.0300 0.0760 7/5/2011 ENER 7.94 0.216 < 0.0300 0.0580 3.60 7/28/2011 ENER 0.242 < 0.0300 0.0510 10/12/2011 ENER 0.176 < 0.0300 0.0600 4.10 4/12/2012 ENER 0.296 < 0.0300 0.0920 8/27/2012 ENER o.213 < 0.0300 0.0590 4/30/2013 ENER 0.267 < 0.0300 0.0700 7/29/2014 ENER 0.209 0.0400 0.0440 4/22/2015 ENER 0.177 < 0.0300 0.0440 5/5/2015 ENER 0.207 < 0.0300 0.0380 6/16/2015 ENER 0.183 < 0.0300 0.0350 8/19/2015 ENER 0.192 0.0400 0.0360 9/29/2015 ENER 0.202 < 0.0300 0.0370 1/11/2016 ENER 0.139 < 0.0300 0.0280 2/18/2016 ENER 0.151 < 0.0300 0.0280 4/5/2016 ENER 7.35 0.139 < 0.0300 0.0290 2.10 2.00

-0.300 < 0.0100 0.100 7/23/2016 ENER 0.163 < 0.0300 0.0330 10/21/2016 ENER 7.50 0.113 < 0.0300 0.0260 2.60 0.150 0.100

< 0.0100 0.200 0951R 4/24/2012 ENER 0.0317 < 0.0300 0.0090 6/11/2012 ENER 0.0228 < 0.0300 0.0090 8/16/2012 ENER 7.45 0.0302 < 0.0300 0.0090 4.00 0.950 0.600 < 0.0100 0.100 8/27/2012 ENER 0.0286 < 0.0300 0.0070 3.20 3/6/2013 ENER 7.25 0.0377 0.0800 0.0090 4.00 1.70 12/18/2014 ENER 0.0796 0.0800 0.0120 2/17/2015 ENER 0.0502 < 0.0300 0.0100 4/30/2015 ENER 7.25 0.0374 < 0.0300 0.0070 3.90 0.610 0.100 < 0.0100 0.0500 A-126 TABLE A.2-4 WATER QUALITY FOR THE NORTH IRRIGATION SUPPLY WELLS (cont'd.)

Minor Constituents Sample Point pH Unat Mo Se N03 Ra226 Ra228 v Th230 Name Date Lab (std. units) (mg/I) (mg/I) (mg/I) (mg/I) (pCi/I) (pCi/I) (mg/I) (pCi/I) 0951R 817/2015 ENER 7.37 0.0312 < 0.0300 0.0080 3.70 1.30 2.10 < 0.0100 0.0006 8/10/2015 ENER 7.24 0.0323 < 0.0300 0.0090 4.00 0.730 2.20 < 0.0100 0.0600 10/8/2015 ENER 0.0304 < 0.0300 0.0080 2/19/2016 ENER 0.0339 < 0.0300 0.0080 9/1/2016 ENER 0.0358 < 0.0300 0.0100 10/17/2016 ENER 0.0362 < 0.0300 0.0070 2/16/2017 ENER 0.0348 < 0.0300 0.0070 M9

• 12/8/2003 ENER 5.68 3.71 0.383 6/21/2004 ENER 4.52 3.41 0.0530 < 0.100 .. 11 /8/2004 ENER 4.20 3.78 0.300 r 4/12/2005 ENER 4.62 3.76 0.298 4.20 9/26/2005 ENER 4.97 3.50 0.300 3.80 2/21/2006 ENER 4.87 3.82 0.260 3.60 9/14/2006 ENER 4.62 3.73 0.254 4.90 5/30/2007 ENER 4.68 3.42 0.234 3.80 9/18/2007 ENER 4.72 3.57 0.255 4.00 3/5/2008 ENER 4.01 2.90 0.267 4.60 9/22/2009 ENER 3.49 2.59 0.232 7.30 9/22/2010 ENER 3.80 2.75 0.225 5.10 2/22/2011 ENER 3.61 2.98 0.204 8/2/2011 ENER *7.92 3.85 3.04 0.207 5.70 0.410 5/17/2012 ENER 1.27 0.660 0.134 7/30/2012 ENER 7.70 1.59 1.02 0.134 8.20 9.40 2/20/2013 ENER 1.35 0.670 0.116 11/23/2013 ENER 5.12 7.02 0.201 12/17/2013 ENER 2.29 2.09 0.135 9/29/2014 ENER 3.60 3.55 0.220 3/3/2015 ENER 1.19 0.870 0.133 6/11/2015 ENER 7.44 1.66 1.16 0.154 5.90 0.260 A-127 -------------------

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TABLE A.2-4 WATER QUALITY FOR THE NORTH IRRIGATION SUPPLY WELLS (cont'd.)

Minor Constituents Sample Point pH Unat Mo Se N03 Ra226 Ra228 v Th230 Name Date Lab (std. units) (mg/I) (mg/I) (mg/I) (mg/I) (pCi/I) (pCi/I) (mg/I) (pCi/I) M9 10/1/2015 ENER 2.63 1.89 0.207 3/16/2016 ENER 1.08 0.770 0.112 M16 9/19/2006 ENER 7.51 0.904 0.100 0.146 18.4 < 0.200 10/10/2007 ENER 1.07 0.170 0.149 14.7 8/28/2008 ENER 1.09 0.170 0.124 12.9 4/3/2009 ENER 1.11 0.170 0.119 10.3 7/22/2009 ENER 7.11 1.10 0.180 0.123 13.6 0.250 1.80 < 0.0100 0.0400 5/18/2010 ENER 1.18 0.220 0.117 6.10 10/1/2015 ENER 0.673 0.140 0.0780 MO 7/7/1995 ENER 7.82 0.620 0.0500 0.264 20.6 0.600 < 1.000 < 0.0100 < 0.200 12/4/1995 ENER 7.64 0.529 0.0600 0.199 27.5 < 0.200 < 1.000 < 0.0100 < 0.200 6/24/1996 ENER 0.741 0.0600 0.250 < 0.200 8/22/1996 ENER 0.910 0.130 0.157 12/20/1996 ENER 0.523 0.110 0.0710 3/12/1997 ENER 0.445 0.0600 0.0730 10/21/1997 ENER 7.98 0.337 < 0.0300 0.106 12.3 < 0.200 1/20/1998 ENER 0.380 0.107 1/20/1998 ENER # 0.381 # 0.107 7/21/1998 ENER 7.85 0.374 0.0400 0.0870 10.00 < 0.200 1/19/1999 ENER 0.374 0.0930 1/19/1999 ENER # 0.376 # 0.0930 7/21/1999 ACZ # 7.70 # 0.343 # 0.0200 # 0.0710 # 10.2 # 0.140 7/21/1999 ENER 7.71 0.355 < 0.0300 0.0830 11.0 < 0.200 7/21/1999 ENER # 7.69 # 0.353 #< 0.0300 # 0.0800 # 10.4 # < 0.200 1/27/2000 ENER 0.376 0.0720 1/27/2000 ENER # 0.399 # 0.0740 7/18/2000 ENER 7.97 0.395 < 0.0300 0.0752 9.90 0.200 3/12/2001 ENER 0.280 < 0.0300 0.0600 # Signifies Quality Control Sample A-128 TABLE A.2-4 WATER QUALITY FOR THE NORTH IRRIGATION SUPPLY WELLS (cont'd.)

Minor Constituents Sample Point pH Unat Mo Se N03 Ra226 Ra228 v Th230 Name 4 Date Lab (std. units) (mg/I) (mg/I) (mg/I)-(mg/I) (pCi/I) (pCi/I) (mg/I) (pCi/I) MO 10/9/2001 ENER 0.284 < 0.0300 0.0673 3/20/2002 ENER 0.336 < 0.0300 0.0770 3/20/2002 ENER # 0.342 #< 0.0300 # 0.0700 10/14/2002 ENER 0.318 < 0.0300 0.0660 3/10/2003 ENER 0.408 < 0.0300 0.0680 3/10/2003 ENER # 0.389 # < 0.0300 # 0.0700 10/13/2003 ENER 0.353 < 0.0300 0.0550 15.1 3/11/2004 ENER 0.401 < 0.0300 0;0650 10/13/2004 ENER 0.410 < 0.0300 0.0730 17.1 3/14/2005 ENER 0.417 < 0.0300 0.0890 10/11/2005 ENER 0.445 < 0.0300 0.100 18.8 3/2/2006 ENER 0.726 < 0.0300 0.118 712012006 ENER 7.61 0.262 < 0.0300 0.0820 14.4 < 0.200 10/2/2006 ENER 0.476 < 0.0300 0.101 23.1 3/8/2007 ENER 0.417 < 0.0300 0.0920 10/10/2007 ENER 0.502 < 0.0300 0.103 22.8 3/10/2008 ENER 0.352 < 0.0300 0.0860 8/28/2008 ENER 0.474 < 0.0300 0.0880 19.5 3/4/2009 ENER 0.314 < 0.0300 0.0720 7/22/2009 ENER 0.564 < 0.0300 0.0890 22.5 ---3/8/2010 ENER 0.498 < 0.0300 0.0870 5/18/2010 ENER 0.530 < 0.0300 0.0890 18.0 3/15/2011 ENER 0.395 0.0400 0.0670 10/10/2011 ENER 0.326 0.0300 0.0710 5.50 10/2/2012 ENER 0.308 < 0.0300 0.0660 5.20 10/2/2012 ENER # 0.294 #< 0.0300 # 0.0680 # 5.30 3/4/2013 ENER 0.266 < 0.0300 0.0630 11/1/2013 ENER 0.264 < 0.0300 0.0580 4.80 3/19/2014 ENER 0.236 0.0300 0.048!) # Signifies Quality Control Sample A-129 ----------------------------------------------------

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TABLE A.2-4 WATER QUALITY FOR THE NORTH IRRIGATION SUPPLY WELLS (cont'd.)

Minor Constituents Sample Point pH Unat Mo Se N03 Ra226 Ra228 v Th230 Name Date Lab (std. units) (mg/I) (mg/I) (mg/I) (mg/I) (pCi/I) (pCi/I) (mg/I) (pCi/I) MO 3/12/2015 ENER 0.251 < 0.0300 0.0900 10/15/2015 ENER 0.267 < 0.0400 0.0650 10.00 3/15/2016 ENER 0.276 0.0800 0.0680 10/26/2016 ENER 0.243 < 0.0300 0.0680 9.40 3/17/2017 ENER 0.193 < 0.0300 0.0500 MQ 6/29/1995 ENER 7.55 1.02 0.120 0.562 13.8 < 0.200 < 1.000 < 0.0100 < 0.200 5/15/1996 ENER 0.947 0.170 0.599 9/11/1996 ENER 7.88 0.789 0.140 0.397 14.3 1.10 < 1.000 < 0.0100 0.600 12/20/1996 ENER 0.674 0.110 0.383 3/12/1997 ENER 0.810 0.100 0.593 10/21/1997 ENER 7.83 1.16 0.380 0.159 11.3 < 0.200 3/4/1998 ENER 1.42 0.280 0.231 10/22/1998 ENER 7.66 1.03 0.280 0.195 8.08 < 0.200 10/20/1999 ENER 0.965 0.300 0.133 11/1/2000 ENER 0.895 0.260 0.158 10/22/2001 ENER 1.55 0.360 0.335 10/17/2002 ENER 1.88 0.560 0.320 1/12/2004 ENER 2.61 0.970 0.341 7.65 10/15/2004 ENER 2.52 1.10 0.332 4/12/2005 ENER 1.63 0.700 0.327 10.4 9/26/2005 ENER 2.16 0.910 0.247 3.50 2/21/2006 ENER 2.31 1.24 0.271 7.40 7/23/2006 ENER 2.07 1.03 0.238 5.20 5/30/2007 ENER 2.66 1.55 0.278 6.60 9/17/2007 ENER 2.71 1.51 0.255 5.40 3/5/2008 ENER 2.01 0.900 0.202 8.60 9/22/2009 ENER 2:18 1.08 0.184 8.29 9/22/2010 ENER 1.61 0.560 0.139 9.40 2/22/2011 ENER 1.49 0.590 0.124 A-130 TABLE A.2-4 WATER QUALITY FOR THE NORTH IRRIGATION SUPPLY WELLS (cont'd.)

Minor Constituents Sample Point pH Unat Mo Se N03 Ra226 Ra228 v Th230 Name Date Lab (std. units) (mg/I) (mg/I) (mg/I) (mg/I) (pCi/I) (pCi/I) (mg/I) (pCi/I) MQ 8/2/2011 ENER 7.90 1.19 0.460 0.145 8.50 0.310 7/18/2012 ENER 7.31 0.991 0.190 0.107 9.10 -0.100 2/20/2013 ENER 0.956 0.170 0.105 11 /23/2013 ENER 1.37 0.990 0.104 9/29/2014 ENER 0.938 0.410 0.108 3/3/2015 ENER 0.823 0.320 0.0930 6/11/2015 ENER 7.40 0.874 0.380 0.110 5.60 0.320 10/1/2015 ENER 0.884 0.320 0.0990 3/16/2016 ENER 0.754 0.340 0.0830 3/24/2017 ENER 0.727 0.310 0.0680 MR 7/14/1995 ENER 7.74 0.453 < 0.0300 0.102 4.43 0.300 < 1.000 < 0.0100 < 0.200 12/4/1995 ENER 7.59 0.367 < 0.0300 0.137 4.54 0.400 < 1.000 < 0.0100 0.400 8/22/1996 ENER 0.605 < 0.0300 0.124 12/20/1996 ENER 0.523 < 0.0300 0.114 3/12/1997 ENER 0.555 < 0.0300 0.108 10/21/1997 ENER 7.97 0.552 < 0.0300 0.102 6.13 < 0.200 3/4/1998 ENER 0.646 0.0300 0.128 10/22/1998 ENER 7.78 0.573 0.0400 0.146 8.08 < 0.200 10/20/1999 ENER 0.648 0.0300 0.111 7.11 11/1/2000 ENER 0.612 0.102 6.90 10/22/2001 ENER 0.499 0.132 7.80 11 /11 /2002 ENER 0.458 0.126 6.70 1/19/2004 ENER 0.530 0.0500 0.131 7.42 11/10/2004 ENER 0.546 0.0500 0.107 4/11/2005 ENER 0.509 0.0500 0.100 10/11/2005 ENER 0.318 < 0.0300 0.0630 3.40 4/10/2006 ENER 0.463 0.0400 0.0930 413012007 ENER 0.750 0.0900 0.131 10/10/2007 ENER 0.757 0.0900 0.142 10.4 A-131 -------------------

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TABLE A.2-4 WATER QUALITY FOR THE NORTH IRRIGATION SUPPLY WELLS (cont'd.)

Minor Constituents Sample Point pH Unat Mo Se N03 Ra226 Ra228 v Th230 Name Date Lab (std. units) (mg/I) (mg/I) (mg/I) (mg/I) (pCi/I) (pCi/I) (mg/I) (pCi/I) MR 3/3/2009 ENER 0.595 0.0800 0.0760 7/22/2009 ENER 0.675 0.0900 0.0890 10.9 3/10/2015 ENER 0.385 0.0500 0.0770 . 4/14/2015 ENER 0.410 0.0500 0.0710 8/7/2015 ENER 7.48 0.434 0.0600 0.0790 5.90 0.310 2.70 < 0.0100 0.0090 3/15/2016 ENER 0.503 0.0800 0.0730 9/8/2016 ENER 0.430 0.0600 0.0650 4.50 3/20/2017 ENER 0.391 0.0500. 0.0530 MS 7/10/1995 ENER 7.74 0.0650 < 0.0300 0.0210 0.320 < 0.200 1.60 < 0.0100 < 0.200 12/4/1995 ENER 7.66 0.0525 < 0.0300 0.0170 1.51 < 0.200 < 1.000 < 0.0100 0.400 8/22/1996 ENER 0.373 < 0.0300 0.0890 12/20/1996 ENER 0.329 0.0400 0.0550 3/12/1997 ENER 0.368 0.0300 0.0560 10/21/1997 ENER 7.86 0.292 0.0500 0.0570 3.15 < 0.200 3/4/1998 ENER 0.217 < 0.0300 0.0440 10/22/1998 ENER 7.81 0.192 0.0200 0.0480 1.76 < 0.200 10/20/1999 ENER 0.150 < 0.0300 0.0320 11/1/2000 ENER 0.125 < 0.0300 0.0402 10/22/2001 ENER 0.0860 < 0.0300 0.0330 11/11/2002 ENER 0.0583 < 0.0300 0.0340 -1/19/2004 ENER 0.0582 < 0.0300 0.0480 2.12 11 /10/2004 ENER 0.0610 < 0.0300 0.0490 10/11/2005 ENER 0.0544 < 0.0300 0.0380 2.40 10/2/2006 ENER 0.0758 < 0.0300 0.0490. 2.40 10/10/2007 ENER 0.0779 < 0.0300 0.0600 2.10 8/28/2008 ENER 0.114 < 0.0300 0.0530 2.54 7/22/2009 ENER 0.104 < 0.0300 0.0460 2.17 6/8/2011 ENER 0.462 0.0700 0.0910 7/5/2011 ENER 7.94 0.302 0.0300 0.0690 3.30 A-132 TABLE A.2-4 WATER QUALITY FOR THE NORTH IRRIGATION SUPPLY WELLS (cont'd.)

Minor Constituents Sample Point pH Unat Mo Se N03 Ra226 Ra228 v Th230 Name Date Lab (std. units) (mg/I) (mg/I) (mg/I) (mg/I) (pCi/I) (pCi/I) (m_gll) (pCill) MS 7/28/2011 ENER 0.284 0.0400 0.0490 10/12/2011 ENER 0.188 < 0.0300 0.0490 2.60 4/12/2012 ENER 0.243 < 0.0300 0.0650 8/27/2012 ENER 0.288 < 0.0300 0.0500 4/30/2013 ENER 0.434 0.0500 0.0720 11/23/2013 ENER 0.0555 0.170 0.137 6/30/2016 ENER 7.41 0.175 < 0.0300 0.0260 1.30 0.390 0.100 < 0.0100 -0.0700 3/29/2017 ENER 0.162 < 0.0300 0.0230 A-133 -------------------

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I I I i ' 'I ' I I I I I I I APPENDIXB I SOIL CONCENTRATIONS I I I I I I I I -------------

APPENDIXB TABLE OF CONTENTS SOIL CONCENTRATIONS Page Number B.O IRRIGATION SOILS .......................................................................................................

.... B-1 B.I SOUTH IRRIGATION SOILS .............................................................................................

B-1 B.2 NORTH IRRIGATION SOILS ..................................

... _. ......................................................

B-1 FIGURES B.1-1 SECTION 33 SOIL URANIUM CONCENTRATIONS VS. DEPTH .................................

B-2 B.1-2 SECTION 33 SOIL SELENIUM CONCENTRATIONS VS. DEPTH ................................

B-3 B.1-3 SECTION 34 SOIL URANIUM CONCENTRATIONS VS. DEPTH .................................

B-4 B.1-4 SECTION 34 SOIL SELENIUM CONCENTRATIONS VS. DEPTH ................................

B-5 B.2-1 SECTION 33 SOIL URANIUM CONCENTRATIONS VS. DEPTH ...............................

B-23 B.2-2 SECTION 33 SOIL SELENIUM CONCENTRATIONS VS. DEPTH ..............................

B-24 TABLES B.1-1 PRE-OPERATIONAL AND BACKGROUND SOIL SAMPLE RES UL TS FOR SECTION 33 .........................................................................................................................

B-6 B.1-2 BACKGROUND SOIL ANALYSES, 2000-2010, FOR SECTION 33 CENTER PIVOT .. B-9 B.1-3 PRE-OPERATIONAL AND BACKGROUND SOIL SAMPLES FOR SECTIONS 33 AND 34 FLOOD AREAS .................................

'.: .......................................

B-10 B.1-4 BACKGROUND SOIL ANALYSES, 2000-2010, FOR SECTIONS 33 AND 34 FLOOD AREAS .............................................................................................................

B-14 B.1-5 IRRIGATION SOIL ANALYSES, 2000-2013, FOR SECTION 33 CENTER PIVOT ..... B-16 B.1-6 IRRIGATION SOIL ANALYSES, 2000-2013, FOR SECTION 33 FLOOD AREA ........ B-18 B.1-7 IRRIGATION SOIL ANALYSES, 2000-2013, FOR SECTION 34 FLOOD AREA ........ B-19 Grants Reclamation Project Land.Application Impact Assessment B-i I I I I I I I I I I I I I I I I I* I I I I I I I 11 I I I II I I I I I I I I I I I B.1-8 B.2-1 B.2-2 B.2-3 B.2-4 APPENDIXB TABLE OF CONTENTS SOIL CONCENTRATIONS TABLES (CONTINUED)

Page Number IRRIGATION SOIL METEORIC WATER MOBILITY TEST RESULTS, 2015, FOR SECTIONS 33 AND 34 ......................................................................................................

B-21 PRE-OPERATIONAL AND BACKGROUND SOIL SAMPLE RESULTS FOR SECTION 28 .......................................................................................................................

B-25 BACKGROUND SOIL ANALYSES, 2000-2010, FOR SECTION 28 CENTER PIVOT B-27 IRRIGATION SOIL ANALYSES, 2000-2013, FOR SECTION 28 CENTER PIVOT ..... B-28 IRRIGATION SOIL METEORIC WATER MOBILITY TEST RES UL TS, 2015, FOR SECTION 28 ........................................................................................................................

B-30 Grants Reclamation Project B-ii Land Application Impact Assessment B.O Irrigation Soils The soil data collected during the irrigation program are separated into the soils by area data for the South irrigation areas, Section 33 and 34 in Section B.1 and the North irrigation area, Section 28 in Section B.2. HMC (2013a) should be consulted for details of the soil data. B.1 South Irrigation Soils The soil information for the Section 33 center pivot is presented first in Tables B.1-1 and B.1-2 and the soil data for the Sections 33 and 34 flood areas area presented in Table B.1-3 and Table B.1-4. The irrigated soil concentrations are presented in Table B.1-5 for the Section 33 center pivot while the Sections 33 and 34 flood area soils data are in Tables B.1-6 and B.1-7, respectively.

Soil meteoric water mobility tests were conducted in 2015 on the Sections 33 and 34 soils and these results are presented in Table B.1-8 (see HMC 2016 for details on soil meteoric water mobility tests). Figure B.1-1 compares the background uranium soil concentrations with depth to the 2006, 2008, 2010 and 2012 irrigated soils concentrations in the Section 33 center piv_ot. This plot shows that uranium concentrations increased in the upper 6 feet of the soil profile but there was essentially no change below that depth. The soil selenium concentration also increased only in the upper 6 feet of the soil profile indicating that selenium is not moving downward in the Section 33 center pivot soils (see Figure B.1-2). Figure B.1-3 compares the background soil uranium concentrations with depth to the 2006, 2008, 2010 and 2012 irrigated soils concentrations in the Sec.tion 34 flood area. This plot shows that uranium concentrations increased in the upper 3 feet of these clay soils but are essentially unchanged below that depth. The soil selenium concentration in Figure B.1-4 also only increased in the upper 3 feet of the soil profile showing that selenium is not moving downward in the Section 34 soils beyond this depth. B.2 North Irrigation Soils The Section 28 center pivot soil data are presented in Tables B.2-1 and B.2-2. Table B.2-3 lists the soil concentrations for the Section 28 irrigated sandy soils. Soil meteoric water mobility tests were conducted in 2015 on the Section 28 soils and these results are presented in Table B.2-4 (see HMC 2016). Figure B.2-1 compares the background uranium soil concentrations with depth to the 2006, 2008, 2010 and 2012 irrigated soils concentrations in the Section 28 center pivot. This plot shows that uranium concentrations increased in the upper 6 feet of the soil profile but are essentially unchanged below that depth. Figure B.2-2 shows the soil. selenium concentration also increased in the upper 6 feet of the soil profile in the Section 28 center pivot soils. Grants Reclamation Project B-1 Land Application Impact Assessment

' -I I I I I I I I I I I I I 11 I I I I I I I I I I I I I I I I I I I I 1 1 I I I 0 0 1 2 3 4 5 6 7 OJ' u "' 't: ::I I.I) "C 8 c "' ..... 3: 9 0 Qi CCI ..c ... 10 0 11 12 13 14 15 16 17 Figure B.1-1.Section 33 Soil Uranium Concentrations vs. Depth Uranium Concen trat io n (mg/kg) 0.5 1 1.5 2 2.5 3 3.5 4 4.5 5 Bac kgro und -2006 -2008 -2010 -2012 B-2 0 0 1 2 3 4 5 6 7 QJ' u I'll 't: :I Ill 8 "C c I'll ..... ::t 9 0 CCI .r:. ... g. 10 0 11 12 13 14 15 16 17 Figure B.1-2. Section 33 Soil Selenium Concentrations vs. Depth Selenium Concentration (mg/kg) 0.1 0.2 0.3 0.4 0.5 0.6 0.7 0.8 0.9 1 1.1 1.2 Background

-2006 -2008 -2010 -2012 B-3 I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I .= cil u nl .... .... :I V'I "t:J c nl _. 3 0 Qi CCI ..c .... Q. Cll c 0.0 Figure B.1-3. Section 34 Soil Uranium Concentrations vs. Depth Uranium Concentration (mg/kg) 0.5 1.0 1.5 2.0 2.5 3.0 3.5 4.0 4.5 5.0 0 5 Background

-2006 6 -2008 -2010 7 -2012 8 B-4 I I' Figure B.1-4. Section 34 Soil Selenium I Concentrations vs. Depth Sel en i um C oncentrat i on (mg/kg) I 0.0 0.1 0.2 0.3 0.4 0.5 0.6 0.7 0.8 0.9 1.0 1.1 1.2 0 I I 1 I 2 I 3 I 4 I 5 B a ckgr o und I 41' u -2006 ... 6 -2008 "'C I c "' -2010 ..... :i: -2012 0 7 Qi co I ... Q. 41 0 8 I 9 I 10 I 11 I 12 I 13 I B-5 I I I Table B.1-1. Pre-Operations and Background Soil Samples Results for Section 33 I Dept h Interval ft Location ID Area m Comment S33-4 Treated 0-6 0.37 0.55 ----*I998 I I IS33-4 Treated 6-48 0.36 0.53 ----*1 998 S33-7 Treated 0-24 0.30 0.44 0.03 ----*I 998 S33-8 Treated 0-20 0.58 0.86 0.07 ----I998 S33-9 Untreated 0-24 0.56 0.83 O.I5 ----I998 I I I S33-IO Untreated O-I2 0.70 1.03 0.05 ----1998 33A Treated 0-6 0.24 0.36 0.10 I3 I999 33B Treated 0-6 0.56 0.82 0.20 7 1999 33C Treated 0-6 0.44 0.65 0.05 35 **I999 I I 0-I 133D U ntreated 0-6 0.49 0.73 0.20 22 1999 3301 U ntreated 0-6 0.77 1.14 0.20 18 2000 BG-I U ntreated 0-12 0.66 0.98 0.10 32 2001 , , I I BG-1 Untreated O-I 2 0.58 0.85 ----2 &#2002 BG-I U ntr ea ted O-I2 0.53 0.78 0.12 21 2003 BG-I Untreated 0-12 0.60 0.88 0.27 28 2004 BG-I U ntreated 0-12 0.53 0.78 0.18 27 2005 I I 'BG-I U ntreated 0-1 2 0.60 0.88 0.18 18 2006 BG-I Untreated 0-1 2 0.60 0.89 0.39 68 2007 BG-I U ntreated 0-12 0.49 0.72 0.2 I @170 2008 BG-I Untreated 0-1 2 0.69 1.0 2 O.I9 33 2009 I I !so-I U ntreated 0-12 0.68 1.00 0.17 60 20IO Mean 0.54 0.80 O.I5 27.43 SDY 0.14 0.20 0.09 I8.27 I I CY 25.28 25.28 64.28 67 I Dep th Interval ft Locat i o n ID Area in Comment I S33-4 Treated 6-48 0.36 0.03 ----*I 998 S33-7 Treated 0-24 0.30 0.44 0.03 ----*1 998 S33-8 Treated 0-20 0.58 0.86 0.07 ----1998 I S33-9 U ntreated 0-24 0.56 0.83 O. I5 ----1998 I S33-l 0 U ntreated I 2-30 0.38 0.56 0.03 ----*1998 BG-2 U ntr eated 12-24 0.51 0.76 0.20 29 200I 1-2 BG-2 U ntreated 12-24 0.40 0.59 ----8 #2002 I I BG-2 U ntr eated 1 2-24 0.35 0.52 O.I2 25 2003 BG-2 U ntreated 12-24 0.53 0.79 0.24 32 2004 BG-2 U ntreated 12-24 0.47 0.69 0.15 7I 2005 BG-2 U ntreated I2-24 0.60 0.88 0.16 2I 2006 I I I BG-2 Untreated 12-24 0.60 0.89 0.44 73 2007 BG-2 Untreated 12-24 0.41 0.6 1 0.23 @160 2008 BG-2 Untreated 12-24 0.49 0.73 0.15 25 2009 I I IBG-2 Un treated 12-24 0.50 0.74 O.I4 80 20IO Mean 0.47 0.6 9 O.I5 40.44 SDY 0.10 0.14 0.11 26.62 CY 20.71 20.7 1 72.04 66 I I I I B-6 I Table B.1-1. I Pre-Operations and Background Soil Samples Results for Section 33 (cont.) Dep th Interva l (ft) I Location ID Area in Comment I S33-4 Treated 6-48 0.53 ----*1998 S33-7 Treated 24-48 0.24 0.35 ----*1998 S33-8 Treated 20-48 0.35 0.52 0.03 ----*1998 I S33-9 Untreated 24-48 0.70 1.03 0.10 ----1998 1 S33-l0 Untreated 1 2-30 0.38 0.56 0.03 ----*1998 S33-I 0 U n treated 30-60 0.40 0.59 0.03 ----*1998 BG-3 Untreated 24-36 0.56 0.83 0.30 41 200 11 I 2-3 I BG-3 U ntr eated 24-36 0.45 0.66 8 #2002 BG-3 U n treated 24-36 0.45 0.67 0.12 22 2003 BG-3 Untreated 24-36 0.55 0.81 0.26 31 2004 BG-3 Untreated 24-36 0.53 0.79 0.15

@222 2005 1 I BG-3 Untreated 24-36 0.74 1.09 0.15 16 2006 BG-3 Untreated 24-36 0.58 0.86 0.27 63 2007 BG-3 U n treated 24-36 0.49 0.72 0.20 @180 2008 1 *I BG-3 Untreated 24-36 0.56 0.82 0.13 70 2009 BG-3 Untreated 24-36 0.58 0.86 0.19 40 2010 Mean 0.49 0.73 0.13 36.38 SOY 0.13 0.19 0.10 21.81 I CY 26.64 26.6 1 72.6 4 60 Dep th I Interval (ft) I Location ID Area in Comment S32-2 Un tr eated 24-48 0.26 0.39 <0.0 5 ----*1998 S33-2 U n treated 24-48 0.27 0.4 0.09 ----*1998 S33-4 T r eated 6-48 0.36 0.53 0.03 ----*1998 1 I 3-4 1 s33-7 T r eate d 24-48 0.24 0.35 0.03 ----*1998 S33-8 Treated 20-48 0.35 0.52 0.03 ----*1998 S33-9 U n treated 24-48 0.70 1.03 0.10 ----1998 S33-1 0 U n treate d 30-60 0.40 0.59 0.03 ----*1998 1 I BG-4 U n treated 36-48 0.68 1.0 1 0.15 60 2009 BG-4 U n treated 36-48 0.70 1.03 0.18 50 2010 Mean 0.44 0.65 0.08 55.00 S O Y 0.20 0.29 0.06 7.07 I CV 44.64 44.64 80.80 1 2.86 De p t h I Interva l ft Locatio n ID Area In Comment S33-I 0 U n treated 30-60 0.4 0 ----*1998 4-5 BG-5 U n treated 48-60 0.6 1 0.90 0.12 60 2009 BG-5 Un tr eated 48-60 0.64 0.94 0.1 7 60 20 1 0 I Mean 0.55 0.8 1 0.1 1 60.00 S O Y 0.1 3 0.19 0.07 0.00 CV 23.58 23.65 70.1 5 0.00 I De p t h I I nterva l ft Location ID Area i n Comment 5-7 BG-5-7 Untreated 6 0-72 0.35 0.08 2009 1 I BG-5-7 U n t r eated 6 0-72 0.46 0.11 50 2010 Mean 0.4 1 0.10 60.00 SOY 0.08 0.11 0.02 1 4.14 CV 1 8.86 18.86 22.33 23.57 I I I 8-7 I I I Table B.1-1. Pre-Operations and Background Soil Samples Results for Section 33 (cont.) I Dep th In terva l ft Locat i on ID A r ea m Co mm ent 7-9 BG-7-9 U n treated 72-96 2009 I BG-7-9 U n trea t ed 72-96 0.1 4 40 20 1 0 Mean 0.61 0.9 0 0.1 2 35.00 SDV 0.09 0.1 3 0.04 7.07 CV 1 5.01 1 5.0 1 30.74 20.20 I Dept h I n terva l ft Loca ti o n TD Area m Co mm e n t 9-1 1 BG-9-11 Un tr eate d 96-1 2 0 0.49 2009 I BG-9-11 Unt r eated 96-1 20 0.67 0.11 <30 2010 Mean 0.58 0.08 31.00 SDV 0.13 0.1 9 0.04 1.41 I CV 22.33 22.33 53.03 4.56 Dep th Seleni um Int erva l ft Locatio n ID A r ea m m /k m /k Co mm e n t I 11-1 3 BG-11-13 U n trea t ed 120-1 4 4 <0.05 40 2009 BG-11-1 3 Untreate d 120-1 44 0.06 <30 2010 Mean 0.45 0.03 35.00 SDV 0.10 0.14 0.02 7.07 I CV 21.43 2 1.43 98.99 20.20 De pth I In terva l ft Loca ti o n ID Area i n Co mm ent 1 3-1 5 BG-1 3-15 U ntr ea t ed 144-1 68 0.46 2009 BG-13-15 U n trea t e d 144-1 68 0.28 0.42 <30 2010 Mean 0.37 0.55 50.00 I SDV 0.1 2 0.1 8 0.03 28.28 CV 33.43 33.43 35.36 56.57 De p t h Sele nium ' I I nt erva l ft Locat i o n ID Area in m /k Co mm ent 1 5-1 7 BG-1 5-17 U n treate d 168-1 92 0.67 0.1 4 2009 BG-1 5-1 7 Untrea t e d 168-1 92 0.30 0.45 0.09 <30 2010 I Mean 0.49 0.72 0.12 50.00 SDV 0.26 0.38 0.04 28.28 CV 53.03 53.03 30.7 4 56.57 I @ = co n s i dered an o utl ier , did not u se * = 1 998 Se Reported as l ess than LLD of 0.05 mg/kg , u sed ** = 1 999 Se MDL= 0.1 R eporte d as l ess t h an MDL, u se d 0.05 m g/kg I # = 2002 Se MDL= 0.8 All data r e p orted as< MDL , did not u se CV= coefficient o f var i a ti on S D V =s t andard dev i at i on I I I I B-8 I I I 8.1-2. Background Soil Analyses, 2000-2010 , for Section 33 Center Pivot Sample U Se Mo pH Cond. Ca Mg Na SAR CJ S04 Site Date (mg/kg) (mg/kg) (mg/kg) (units) mmhos/crr (meq/l) (meq/l) (meq/l) (ratio) (mg/kg) (mg/kg) I SECTI O N 33 CENTE R PIVOT I BG-I J2/7/2000 1.14 0.20 <J 7.6 J.240 9.07 2.64 0.64 0.26 J8 <50 6/20/200J 0.98 O.JO J 7.9 0.23J 1.5 J 0.48 0.43 0.43 32 <300 J J/20/2002 0.85 <0.6 <J 7.8 0.450 3.5J 0.98 0.69 0.46 <4 <JOO J J/J 8/2003 0.78 0. J2 <J 7.8 0.700 4.J3 1.15 0.60 0.36 2J J60 J J/8/2004 0.88 0.27 <J 7.7 0.980 6.22 1.94 1.83 0.9 J 28 60 J J/5/2005 0.78 0.18 <J 8.J 0.835 5.20 1.54 1.60 0.87 27 570 J0/21/2006 0.88 O.J8 <I 7.9 J.060 6.04 1.69 1.87 0.95 J8 J60 J J/J 0/2007 0.89 0.39 <J 7.7 l.5JO 7.57 2.80 2.03 0.89 68 280 11/22/2008 0.72 0.2J J 8.0 0.883 6.J3 2.J 2 l.8 J 0.89 J70 820 J 0/22/2009 1.02 O.J9 <J 7.5 1.08 7.32 2.2J 1.78 0.8J 33 230 J2/J/2010 1.00 O.J7 2 7.8 0.98 6.35 2.22 2.25 1.09 60 440 BG-2 6/20/200J 0.76 0.20 <J 7.9 0.32 J 1.83 0.92 0.57 0.48 29 <300 J J/20/2002 0.59 <0.6 <J 7.7 J.250 7.58 3.04 3.56 1.54 8 <JOO J J/I 8/2003 0.52 O.J2 <J , 7.7 0.670 4.27 1.28 0.70 0.42 25 90 J J/8/2004 0.79 0.24 <J 7.8 0.690 4.05 1.45 1.22 0.74 32 70 J J/5/2005 0.69 O.J5 <J 8.J 0.745 4.24 1.45 J .4J 0.83 7J 2J40 J0/21/2006 0.88 O.J6 <J 8.0 0.757 3.63 1.60 1.47 0.90 2J J20 11/10/2007 0.89 0.44 <I 7.7 J.550 9.46 3.44 2.42 0.95 73 350 J J/22/2008 0.6J 0.23 2 8.0 0.809 5.05 2.2 J 1.73 0.90 J60 680 J 0/22/2009 0.73 O.J5 <J 7.6 1.07 7.78 2.8 J I.OJ 0.43 25 220 12/J/20 1 0 0.74 O.J4 <J 7.9 0.63 3.62 1.65 0.87 0.53 80 320 BG-3 6/20/200 J 0.83 0.30 <J 7.9 0.385 2.4J 1.12 0.48 0.36 4J 300 J J/20/2002 0.66 <0.6 <J 7.9 0.580 3.39 1.32 1.79 I. J 7 8 300 J J/18/2003 0.67 0.12 <J 7.7 0.620 3.77 1.39 0.70 0.43 22 70 J J/8/2004 0.8J 0.26 <J 7.8 0.720 4.J3 1.54 1.50 0.89 3J 80 J J/5/2005 . 0.79 O.J5 2 8.3 0.607 3.39 1.26 1.23 0.80 222 6 7 70 I 0/21/2006 1.09 O.J5 <J 8.0 1.080 5.54 2.55 2.20 1.09 J6 200 J J/J 0/2007 0.86 0.27 <J 7.7 1.740 J0.60 3.73 2.8J 1.05 63 300 J 1/22/2008 0.72 0.20 3 8.0 0.877 5.06 2.27 2.37 1.24 J80 870 J0/22/2009 0.82 O.J3 J 7.7 0.600 3.48 1.36 0.87 0.55 70 370 J2/l/20JO 0.86 O.J9 J 8.0 0.529 2.55 1.36 1.14 0.8 1 40 200 BG-4 I 0 1 22 1 2009 I.OJ O.J5 <J 7.7 0.578 3.33 1.40 0.95 0.6J 60 370 J2/J/20 JO 1.03 O.J8 2 8.0 0.656 3.32 1.59 1.58 I.OJ 50 340 BG-5 10/22/2009 0.90 0.12 <J 7.7 0.692 4.09 1.66 I. J 5 0.67 60 390 J2/J/20JO 0.94 O.J7 2 8.0 0.920 4.71 2.31 2.47 1.32 60 330 BG-5-7 10/22/2009 0.52 0.08 <J 7.9 0.508 2.86 1.09 0.80 0.56 70 350 J 2/l/20J 0 0.68 0.11 <J 7.9 0.635 3.53 1.48 1.34 0.84 50 360 BG-7-9 J 0/22/2009 0.80 0.09 <J 7.6 0.442 2.57 0.87 0.65 0.49 30 240 J 211/20 10 0.99 0.14 J 8.0 0.730 3.96 1.56 2.02 1.22 40 320 BG-9-J J J0/22/2 009 0.76 0.05 <J 7.6 0.426 2.47 0.8 1 0.63 0.49 32 230 12/J/20JO 0.99 O.J J 2 7.7 J.260 8.78 3.J5 2.9J I. J9 <30 380 BG-I J -J 3 J0/22/2009 0.56 <0.05 <J 7.7 0.335 1.96 0.59 0.55 0.48 40 300 J2/l/20 JO 0.56 0.06 J 7.7 0.953 5.48 2.08 3.09 1.59 <30 380 BG-J 3-J 5 J 0/22/2009 0.68 O.JO <J 7.6 0.3 J 8 1.69 0.50 0.57 0.54 70 540 J2/J/20JO 0.42 0.06 J 7.9 0.593 3.J3 1.24 1.89 1.28 <30 290 BG-J 5-J 7 J0/22/2009 0.99 O.J4 J 7.7 0.387 2.06 0.68 0.87 0.74 70 530 J2/l/20J 0 0.45 0.09 J 7.9 0.50J 2.74 1.00 1.48 1.08 <30 290 NOTE: 2000 Samp l e: J = 0 -6 inch es , 2 = 6 -J 8 inches and 3 = J 8 -36 inches 2001 thro u gh 2008 Sample: I= 0 -I ft , 2 = J -2 ft and 3 = 2 -3 ft; BG sam ple s are backgro u nd. B-9 I I I I I I I I I I I I I I I I I I I I I Table B.1-3. Pre-Operational and Background So il Samples for Sections 33 and 34 Flood Areas Location ID I I I Natural Uran i um I I I Selenium C h l o r ide Interval (ft) Area Deoth (in) I I mo/ko I (molko' (mo!ko' Com m ent S33-I Untreated 0-6 0.% 1.42 O.J3 ----J998 S33-J Untreated 6-24 1.23 1.82 O.J9 ----J998 I S33-2 Untreated 0-6 1.12 1.65 O.J8 ----J998 S33-2 ' Untreated 6-24 1.02 l.5J O.J9 ----1998 S3-J U n treated 0-14 0.70 1.03 O.J J ----J998 S34-J U ntr ea t ed 3-24 @5.85 @8.77 0.10 ----1998 S34-3 Treated 4-26 1.03 1.52 0.J J ----J998 I S34-5 Untreated 3-40 0.84 1.24 O.J4 ----J 998 S34-7 Untreated 3-28 0.78 I.I 5 0.06 ----J998 S34-8 Untreated 2-30 1.26 1.86 0.3J ----J998 S34-JO Untreated 3-28 I.OJ 1.49 O.J3 ----J998 S34-J J Untrea t ed 3-J 5 1.36 2.0J 0.03 ----*1998 I S34-J3 Untreated 4-J 8 @3.93 @5.8J O.J J ----J998 S34-J4 T r eated 4-24 0.79 I. J 7 O.J9 ----J998 34A T r eated 0-6 1.84 2.72 0.40 36 J 999 348 Treated 0-6 1.60 2.36 0.40 54 J 999 34C Treated 0-6 I. J8 J .75 0.30 79 J999 I 34D Treated 0-6 2.44 3.60 0.60 36 J999 34E Treated 0-6 1.56 2.3J 0.40 25 J999 0-J 34F Treated 0-6 2.05 303 0.80 68 J999 340 Treated 0-6 1.25 1.85 0.30 J3 J 999 34H Treated 0-6 2.29 3.38 0.70 43 1 999 I 34 1 Treated 0-6 0.67 0.99 O.J O 42 1 999 B G-J-34 U n trea t e d O-J 2 1.67 2.47 0.30 J OO 200 J BG-J-34 Untreated O-J2 0.30 0.45 7 #2002 B G-J-34 Untreated 0-J2 1.58 2.33 0.42 83 2003 B G-J-34 Untreated O-J2 1.89 2.79 0.75 J5J 2004 I BG-J-34 Untreated 0-J2 1.63 2.4J 0.53 @400 2005 I B G-J-33F Untreated 0-J2 1.06 1.56 0.47 30 2004 B G-J-33F Untreated O-J 2 0.76 1.12 0.25 76 2005 B G-J-33F Untrea t ed 0-J 2 1.05 1.55 0.56 24 2006 BG-J-34 Untrea t ed 0-J 2 207 3 06 0.69 @253 2006 B G-J-33F U n trea t ed 0-J 2 J.2J 1.79 0.38 64 2007 B G-J-34 Untrea t ed 0-J 2 2.23 3.30 0.74 @267 2007 BG-J-33F Untreated 0-J2 0.97 J .44 0.32 @220 2008 B G-J-34 Untreated O-J2 J.7J 2.52 0.57 @289 2008 BG-J-33F Untreated 0-J2 0.83 1.22 0.23 50 2009 I B G-J-34 Untreated O-J2 2.27 3.35 0.59 J35 2009 B F-J-33F U n tr e ated 0-J2 0.96 1.42 0.27 J 50 20JO BF-J-34 U n treate d 0-J2 2.2J 3.27 0.58 J 99 20 J O Mean 1.35 2.00 0.35 69.76 S DY 0.55 0.8 J 0.22 51.23 I CY 40.34 40.37 63.JO 73 I I I I I I I B-1 0 I Table B.1-3. Pre-Operational and Background Soil Samples for Sections 33 and 34 Flood Areas (cont.) I nterval (ft 1*2 Location ID S33*1 S33*2 S3*1 S34*1 534-3 534-5 534-7 534-8 534-10 534-11 534-13 534-13 534-14 BG-2 BG-2 BG-2 BG-2-34 BG-2-34 BG-2-33F BG-2-33F BG-2-33F B G-2-34 B G-2-33F BG-2-34 BG-2-33F BG-2-34 BG-2-3 3F BG-2-3 4 BG-2-3 3F B G2-34 Area Untreated Untreated Untreated Untrea ted Treated Untreated Untrea t ed Untreated Untrea ted Untreated Untrea ted U ntreated Treated U ntreated U ntr eated U ntreated Untreated Untreated Untreated Untreated Un treated U ntreated Untreated U ntreated Untreated Untreated Untrea ted Untreated U ntreated Untreated In terval (ft) I Location ID I Area 2-3 533-1 Untrea t ed SJ-I 534-1 534-5 534.7 534-8 534-13 533-2 534-11 534-1 4 BG-3 B G-3 BG-3 BG-3-34 BG-3-33F BG-3-34 BG-3-33 F B G-3-33F BG-3-34 BG-3-33F BG-3-34 BG-3-33F BG-3-34 BG-3-33 F BG-3-34 B G-3-33F BG-3-34 U ntr ea t ed Untreated U ntreated Untrea ted Untreated

Untreated Un treated Untreated Trea t ed Untreated U ntreated Untr eated Untreated Untreated U ntreated U ntreated U ntreated Untreated Untreated Untreated Untreated Untreated Untreated Untreated U ntreated Untreated 6-24 6-24 14-38 3-24 4-26 3-40 3-28 2-30 3-28 15-60 4-18 18-30 4-24 12-24 12-24 12-24 12-24 12-24 12-24 12-24 12-24 12-24 12-24 12-24 12-24 12-24 12-24 12-24 12-24 12-24 Mean SDV CV 1 4-38 24-36 3-40 28-40 30-60 18-30 24-48 15-60 30-90 24-36 24-36 24-36 24-36 24-36 24-36 24-36 24-36 24-3 6 24-36 24-36 24-36 24-36 24-36 24-36 24-36 24-36 Mean SDV CV B-11 1.02 0.71 @5.85 1.03 0.84 0.78 1.26 1.01 0.58 @3.93 0.68 0.79 1.30 0.36 0.99 1.38 1.65 0.88 0.62 0.78 @2.66 0.87 1.8 7 0.80 1.48 1.08 1.46 0.99 1.77 1.04 0.38 35.99 0.7 1 0.43 0.84 0.43 0.69 0.68 0.40 0.58 0.20 0.53 0.27 1.12 0.93 0.90 1.44 0.6 1 0.7 1 1.55 0.84 I.II 0.66 0.85 0.4 1 0.43 0.58 1.14 0.75 0.35 46.26 1.82 1.51 1.05 @877 1.52 1.24 1.15 1.86 1.49 0.86 @5.81 1.00 1.17 1.92 0.53 1.46 2.04 2.44 1.30 0.92 1.15 @3.93 1.29 2.67 1.18 2.19 1.60 2.15 1.46 2.6 1 1.54 0.55 35.57 1.95 1.05 0.64 1.24 0.64 1.02 1.00 0.59 0.86 0.30 0.79 0.40 1.66 1.38 1.33 2.13 0.90 1.05 2.29 1.24 1.64 0.97 1.26 0.61 0.63 0.86 1.69 1.12 0.52 46.20 0.19 0.19 0.09 0.10 0.11 0.14 0.06 0.31 0.13 0.03 0.11 0.14 0.19 0.20 0.35 0.68 0.69 0.39 0.20 0.35 @0.87 0.3 1 0.78 0.31 0.48 0.29 0.39 0.27 0.56 0.29 0.20 69.20 0.23 0.09 0.1 3 0.14 0.41 0.34 0.14 0.09 0.03 0.03 0.20 0.36 0.40 0.42 0.51 0.19 0.34 0.54 0.35 0.53 0.25 0.27 0.10 0.17 0.17 0.42 0.26 0.16 58.99 1 20 4 131 35 103 20 @219 57 @271 90 @257 70 168 1 20 284 100.1 7 75.64 76 120 4 141 @169 30 @354 8 1 14 @259 43 @246 @170 @2 1 0 40 159 110 265 91.55 77.99 85 Com ment 1998 1998 1998 1 998 1 998 1 998 19 98 1998 1998 *1998 1998 1998 1998 200 1 #2002 2003 2004 2005 2004 2005 2006 2006 2007 2007 2008 2008 2009 2009 2010 2010 Comment 1998 1 998 1998 1 998 1998 1998 1998 1 998 *1998 *1998 200 1 #2002 2003 2004 2004 2005 2005 2006 2006 2007 2007 2008 2008 2009 2009 2010 2010 I I I I I I I I I I I , I I I I I I I I I I Table B.1-3. Pre-Ope r ational and Background Soil Samples for Sect i ons 33 and 34 Flood Areas (cont.) I Interval ft L ocation ID Area Comme nt S34-l I Untreated 0.58 0.86 <0.05 1 998 S34-I U ntrea te d 0.39 0.58 0.068 1998 I S34-8 U ntre ated 30-60 0.69 102 0.34 1998 S33-I U ntre ated 24-48 1.32 195 0.23 1 998 S33-8 U ntrea te d 20-48 0.35 0.52 <0.05 1998 S33-9 U n trea t ed 24-48 0.70 1 03 0.1 0 1 998 S33-IO U ntr eated 30-60 0.40 0.59 <0.05 19 98 I 3-4 S34-14 Treated 30-90 0.2 0.3 <0.05 1998 S34-5 U ntreated 40-53 0.3 0.44 0.08 1 998 S33-2 U ntre a t ed 24-4 8 0.40 0.59 0.09 1 998 S32-2 Treated 24-48 0.39 0.58 <0.05 1998 BG-43-33F Untrea ted 24-36 0.59 0.87 0.12 1 2 2009 I BG-4-34 U n treated 24-36 0.37 0.55 0.10 1 35 2009 BG-4-33F U ntreated 36-48 0.64 0.94 0.1 6 40 20 1 0 BG-4-34 Untreate d 3 6-48 0.38 0.56 0.1 7 1 05.00 2010 Mean 0.51 0.76 0.15 73.00 SDV 0.27 0.40 0.08 56.80 I C V 5225 52.12 57.54 77.8 1 Inte rva l ft L ocat i on ID Area Comm ent I S34-l l Untreated 1 5-60 0.58 0.86 <0.05 1998 S34-I Untrea t ed 36-60 0.39 0.58 0.068 1998 534-8 Untreated 30-60 0.69 102 0.34 1998 S33-IO Untrea t ed 30-60 0.40 0.59 <0.05 1 998 S34-3 T r ea ted 50-90 0.2 0.3 <005 1 998 I 4-5 S34-14 Tr ea t ed 30-90 02 0.3 <0.05 1998 S34-5 T reated 40-53 0.76 1.12 0.07 1998 BG-5-33F Untreated 24-36 0.59 0.87 0.12 30 2009 BG-5-34 Untrea t ed 24-36 0.22 0.33 0.04 55 2009 BG-5-33F Untrea ted 48-60 0.39 0.58 <0.05 30 20 10 I BG-5-34 Un tre ated 48-60 0.35 0.52 0.11 156.00 20 1 0 Mean 0.43 0.64 0.1 2 67.75 SDV 020 0.29 0.11 60.00 CV 45.04 44.75 87.85 88.56 I Interval ft Loc at ion ID Area Co mment S34-5 Untreated 0.76 1.12 0.07 1 998 S34-l I Untreated 60-90 0.26 0.38 <0.05 1998 I 5-7 BG 5-7-33F U ntreat ed 60-72 0.28 0.42 0.05 60 2009 BG 5-7-34 U ntreated 60-72 0.21 0.3 1 0.04 33 2009 BG 5-7-33F U ntreated 60-72 0.35 0.52 <0.05 50 2010 BG 5-7-34 Untreated 60-72 0.35 0.52 0.09 79.00 2010 M ean 0.37 0.55 0.06 55.50 S D V 0.20 029 0.02 1 9.23 I CV 53.80 53.8 1 35.43 34.64 I I I I I B-1 2 I I T able B.1-3. Pre-Operationa l and Background Soi l Samples for Sections 33 and 34 Flood Areas (c ont.) I I nterval (ft) Location ID Area Co mment I S34-l I U ntrea ted 0.26 0.38 <0.05 1 998 BG 7-9-33F U ntreated 72-96 0.24 0.35 <0.05 70 2009 7-9 BG 7-9-34 Un treated 72-96 0.63 0.93 0.09 84 2009 BG 7-9-33F U ntr eated 72-96 0.22 0.33 <0.05 40 2010 BG 7-9-34 Untreated 72-96 0.55 0.8 1 0.1 2 51.00 2010 I M ean 0.38 0.56 0.1 I 61.25 SDV 0.19 0.29 0.02 19.59 CV 51.01 51.20 2 0.20 31.98 I Interval ft L ocation ID Area Co mment BG 9-1 1-33F Untreated 0.44 007 4 0 2009 9-1 I BG 9-1 1-34 U ntr ea t ed %-120 0.75 I.I I 0.1 7 139 200 9 BG 9-1 l-33F Untreated

%-1 20 0.18 0.27 <0.05 40 2010 BG 9-11-34 U ntreated 96-120 0.62 0.9 1 0.11 1 00 20 1 0 I Mean 0.46 0.68 0.12 79.75 SDV 0.27 0.39 0.05 48.58 C V 5 7.59 57.59 43.14 60.92 I Inte rval ft Locati o n ID Area Co mment BG 1 l-13-33F Untr eated 1.33 0.1 4 60 2009 1 1-13 BG I 1-13-34 Untr eated 1 20-144 1.26 1.3 I 15 0 2009 B G I l-1 3-33 F U ntr eate d 1 20-144 0.44 0.6 5 0.07 <30 20 1 0 I BG I 1-13-34 U ntr eated 1 20-144 0.83 1.23 0.14 63 20 1 0 Me an 0.76 1.12 0.42 9 1.00 SDV 0.2 1 0.31 0.60 51.12 CV 28.1 4 28.14 14 3.99 56.1 7 I Inte rval ft Locat io n ID Area Comme nt 1 3-15 B G 1 3-15-34 U ntre a t ed 0.65 0.96 0.53 2009 15-17 B G 15-1 7-34 Un tre a ted 0.66 0.97 0.27 62 2009 I @ = considered an o utlier , did n o t use * = 1 998 Se Re porte d as l ess than LLD of 0.05 mg/kg, u sed 0.025 # = 2002 Se MDL= 0.8 All data reported a s< MDL , did n ot u se CV = coefficient of variation I SDV =s tandard de via tion I I I I I I B-13 I I I I I I I I I I I I I I I I I I I I Table B.1-4. Background Soil Analyses, 2000-2010, for Sect ions 33 and 34 Flood Areas Samp l e Site BG-I BG-2 BG-3 BG-4 BG-5 BG-5-7 BG-7-9 BG-9-11 D ate 11/5/2004 11/8/2005 10/28/2 00 6 11110/2007 12/3/2008 10/27/2009 11/30/20 10 11/5/2004 11/8/2005 10/28/2006 11/1 0/2007 12/3/2008 10/27/2009 11/30/2010 1 1/5/2004 11/8/2005 10/28/2006 11/10/2007 1 2/3/2008 10/27/2009 11/30/2010 10/27/2009 11/30/20 10 10/27/2 009 11/30/2010 10 127/2009 11/3 0/20 10 10/27/2009 11/30/20 10 10 127/2009 11/3 0/2010 B G-11-1 3 10/27/2009 11/3 0/20 10 U Se Mo (mg/kg) (mg/kg) (mg/kg) 1.56 0.47 I 1.12 0.25 <I 1.55 0.56 <l 1.79 0.38 <I 1.44 0.32 <l 1.22 0.23 <I 1.42 0.27 <I 1.30 0.39 <I 0.92 0.20 <I 1.15 0.35 <I 1.29 0.3 1 <I 1.18 0.32 <I 1.60 0.29 <I 1.46 0.27 I 1.33 0.42 <I 0.90 0.19 <I 1.05 0.34 <I 1.24 0.35 <I 0.97 0.25 <I 0.61 0.10 I 0.86 0.17 I 0.87 0.12

<I 0.94 0.16 2 0.46 0.06 <I 0.58 <0.05 I 0.42 0.05 <I 0.52 <0.05 <I 0.35 <0.05 <I 0.33 <0.05 <I 0.44 0.07 <I 0.27 <0.05 <I 1.33 0.14 2 0.65 0.07 I pH Cond. Ca (units) mmhos/crr (meq/l) SECTION 33 FLOOD 7.8 0.770 3.49 7.8 0.962 5.1 6 7.9 0.70 2 2.93 7.8 0.800 4.30 7.9 1.1 50 6.04 8.0 0.464 2.66 7.7 0.728 3.25 7.8 0.820 4.42 7.8 0.829 4.1 3 7.8 0.4 70 1.94 7.8 0.810 4.24 7.8 0.840 4.92 8.0 0.651 2.53 7.7 0.755 3.1 7 7.8 0.940 5.1 3 7.8 1.11 0 5.74 7.9 0.677 2.88 7.8 0.710 3.80 7.8 0.840 4.66 7.9 0.93 3.66 7.8 0.987 3.29 8.0 I. I I 4.99 7.7 0.635 2.98 7.9 0.739 3.15 7.8 0.702 2.66 8.1 0.6 0 3 2.42 7.9 0.47 1 1.75 8.1 0.667 2.89 8.1 0.45 3 1.4 3 8.2 0.617 2.85 8.2 0.4 35 1.28 8.1 0.623 2.6 8 8.0 0.475 1.82 B-14 Mg Na (meq/l) (meq/l) 1.40 2.51 1.84 2.29 1.04 1.98 1.5 5 1.96 2.29 4.20 0.96 0.97 1.18 3.1 7 1.70 2.28 1.52 2.41 0.71 1.37 1.65 1.79 1.90 2.58 1.0 6 2.86 1.19 3.54 2.06 2.79 2.20 3.55 1.05 1.84 1.41 1.96 1.85 3.09 1.94 3.68 1.4 3 5.3 1 2.62 3.65 1.28 2.57 1.65 2.25 0.99 3.65 1.1 3 1.81 0.60 2.4 8 1.24 2.00 0.56 2.59 1.24 1.68 0.51 2.63 1.54 1.50 0.79 2.1 5 SAR (ra tio) 1.60 1.22 1.41 1.15 2.06 0.72 2.1 3 1.30 1.43 1.19 1.04 1.40 2.1 3 2.40 1.47 1.78 1.31 1.21 1.71 2.20 3.46 1.8 7 1.76 1.45 2.70 1.36 2.29 1.39 2.60 1.1 7 2.78 1.0 3 1.88 CI S04 (mg/kg) (mg/k g) --3 0 110 76 2720 24 100 64 140 220 1 2 00 50 250 150 73 0 35 120 10 3 1960 20 2 10 57 1 60 90 660 70 39 0 1 20 7 80 30 160 81 32 00 1 4 190 43 260 1 7 0 900 40 400 1 10 680 1 2 24 0 40 2 10 30 32 0 30 160 60 470 50 34 0 7 0 480 40 230 40 280 40 23 0 60 450 <30 140 Table B.1-4. Background Soil Analyses, 2000-2010, for Sectio n s 33 and 34 Flood Areas (cont.) Sample Site BG-I BG-2 BG-3 BG-4 BG-5 BG-5-7 BG-7-9 BG-9-11 Date 8/8/2001 11/22/2002 11/26/2003 11/3/2004 11/1 9/2005 10/28/2006 11110/2007 12/3/2008 10/30/2009 11/4/20 I 0 8/8/200 1 12/4/2002 11/26/2003 11/3/2004 11119/2005 10/28/2006 11/10/2007 12/3/2008 10/30/2009 11/4/20 10 8/8/2001 11/22/2002 11/26/2003 11/3/2 004 11/19/2005 10/28/2006 11/10/2007 12/3/2008 10/30/2009 11/4/2 010 10/30/2009 11/4/2010 10/30/2009 11/4/20 10 10/30/2009 1 114/20 10 10/3 0/2 00 9 11/4/2010 10/30/2009 11/4/2 010 BG-11-13 I 0/30/2009 11/4/20 10 BG-13-15 10/30/2 009 BG-15-17 I 0/30/2009 U Se Mo (mg/kg) (mg/kg) (mg/kg) 2.47 0.30 2 0.45 <0.6 <I 2.33 0.42 <I 2.79 0.75 <I 2.41 0.53 2 3.06 0.69 <I 3.30 0.74 2 2.52 0.57 I 3.35 0.59 <I 3.27 0.58 3 1.92 0.20 2 0.53 <0.6 <I 1.46 0.35 I 2.04 0.68 <I 2.44 0.39 2 3.93 0.87 <I 2.67 0.78 2 2.1 9 0.48 2 2.15 0.39 I 2.61 0.56 4 0.79 0.20 <I 0.40 <0.6 <I 1.66 0.36 <I 2.0 4 0.40 <I 2.1 3 0.51 2 2.29 0.54 <I 1.64 0.53 <I 1.26 0.27 <1 0.63 0.17 I 1.69 0.42 3 0.55 0.10 <1 0.56 0.17 I 0.33 0.04 <I 0.52 0.11 I 0.3 1 0.04 <I 0.52 0.09 2 0.93 0.09 <l 0.81 0.12 I I. I I 0.17 <I 0.9 1 0.11 2 1.26 1.31 <I 1.23 0.14 3 0.96 0.53 <I 0.97 0.27 <I pH Cond. Ca Mg Na (units) mmhos/crr (meq/l) (meq/l) (meq/l) SECTION 34 FLOOD 7.6 4.160 5.86 1.75 2.87 7.8 0.460 3.52 0.79 0.37 7.8 1.680 5.70 2.22 9.60 7.8 2.320 8.67 2.05 13.30 7.7 3.230 1 2.80 3.50 15.40 7.8 2.200 9.53 2.22 10.60 7.7 3.650 1 9.10 4.81 19.60 7.8 2.740 1 3.70 3.37 15.00 7.8 1.77 7.75 1.77 8.97 7.5 2.48 14.00 3.57 9.68 7.5 4.730 7.94 2.60 4.53 7.8 0.4 10 3.03 1.06 0.32 7.8 3.290 1 8.70 8.07 1 6.90 7.7 4.040 19.70 4.5 1 26.10 7.9 4.460 20.80 4.99 23.90 7.7 2.400 1 2.30 2.59 1 0.90 7.7 4.280 2 1.00 5.02 25.80 7.8 3.260 1 7.90 4.59 18.50 7.7 2.98 18.50 3.41 14.00 7.6 2.34 1 2.20 2.37 10.60 7.6 8.20 0 6.35 2.1 2 2.77 7.9 0.360 2.51 1.1 4 0.35 7.7 2.460 1 2.80 5.95 1 0.70 7.5 4.2 00 25.90 5.95 24.5 0 7.9 4.160 20.50 5.74 19.00 7.8 3.000 15.00 3.17 15.40 7.6 4.420 1 9.80 5.26 27.60 7.7 3.990 22.30 6.24 24.60 7.3 3.33 20.90 4.32 13.40 7.5 2.28 11.60 2.66 9.78 7.4 3.73 27.50 5.50 1 2.90 7.5 2.06 8.65 2.55 10.10 7.8 1.65 9.96 2.54 5.5 1 7.5 4.1 2 30.00 9.14 14.10 7.9 1.04 4.76 1.53 4.18 7.6 3.04 1 6.80 9.48 11.00 7.8 2 7.60 5.49 8.97 7.7 1.83 7.24 5.11 7.77 7.7 3.95 18.90 1 2.40 17.60 7.8 2.48 7.39 4.99 14.00 7.8 5.2 22.10 15.90 28.90 7.7 4.12 19.70 10.60 23.40 7.8 3.33 12.60 9.96 18.80 7.9 4.38 2 1.30 1 4.70 23.70 NOTE: 2000 Samp l e: I = 0 -6 inches , 2 = 6 -18 inche s and 3 = 18 -36 in che s 200 1 throu g h 2008 Samp l e: I = 0 -I ft, 2 = I -2 ft and 3 = 2 -3 ft; BG samp l es are background. B-15 SAR (ratio) 1.47 0.25 4.82 5.74 5.39 4.37 5.67 5.1 3 4.11 3.27 1.97 0.22 4.62 7.50 6.66 3.99 7.15 5.52 4.23 3.93 1.35 0.25 3.49 6.1 4 5.25 5.11 7.80 6.5 1 3.77 3.66 3.18 4.27 2.20 3.1 9 2.36 3.03 3.5 1 3.13 4.45 5.63 6.63 6.01 5.60 5.59 Cl S04 (m g/kg) (mg/kg) 100 800 7 <100 83 850 151 490 400 1 360 253 810 267 800 289 810 135 570 199 680 120 300 4 <100 131 670 220 280 349 1040 219 810 271 1 240 257 1040 168 830 284 800 1 20 100 4 <1 00 141 370 16 9 230 354 1 280 259 1 040 246 950 210 1 480 15 9 4 10 265 560 135 1720 105 200 55 18 9 1 56 810 33 190 79 330 84 360 51 230 139 520 100 360 150 1610 63 790 57 400 62 950 1 1 I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I 1 1 I I I I I I Sampl e Site P-1 P-2 P-3 Table 8.1-5. Irrigation Soil Analyses , 2000-2013, for Section 33 Center Piv o t U Se M o pH C ond. Ca Mg N a Dat e (m g/k g) (mg/k g) (mg/kg) (unit s) mmho s/c rr (m e q/l) (meq/l) (meq/l) SECT IO N 33 CENTER PI V O T 1 2/7/2000 0.93 0.3 7 <1 7.9 0.987 4.00 1.27 5.67 6115/2001 0.94 0.3 0 <I 8.0 1.2 3 0 3.77 1.48 7.48 11/20/2002 0.98 <0.6 <I 7.8 1.610 7.7 1 2.80 8.10 11/18/2003 1.36 0.28 <I 7.8 2.200 7.99 3.25 13.50 11/9/2004 1.78 0.45 <I 7.6 3.780 19.70 8.73 21.40 11/5/2005 1.45 0.3 1 <I 8.1 2.060 9.35 4.02 11.20 10/2 1/2006 1.87 0.36 <I 7.8 3.560 15.80 6.3 6 20.40 11/10/2007 1.67 0.44 <I 7.7 3.280 12.40 5.91 19.10 11/22/2008 1.41 0.41 I 8.0 2.6 3 0 10.70 5.07 17.10 10/612009 2.03 0.41 2 7.8 3.472 14.6 3 6.95 22.75 1 2/2/2010 1.87 0.35 <I 8.0 3.900 18.00 7.96 23.70 10/17/2011 1.56 0.4 2 2 7.7 5.240 17.30 IO.IO 37.40 11/14/2012 2.22 0.40 <I 8.3 4.230 21.70 10.70 22.90 12/16/2013 2.20 <I <I 7.6 4.450 24.40 12.10 21.40 1217/2000 0.81 0.45 <I 7.8 1.480 6.3 0 1.88 7.77 6115 1 2001 0.60 0.3 0 <I 7.9 1.120 4.3 2 1.45 6.11 11/20/2002 0.89 <0.6 <I 7.8 2.1 90 10.1 0 3.78 13.10 11118/2003 1.14 0.19 <l 7.9 2.690 10.3 0 3.86 16.10 11/9/2004 1.52 0.3 9 <I 7.6 4.3 00 19.40 10.80 27.50 11/5/2005 1.15 0.21 2 8.1 3.940 15.10 7.68 27.30 I 0/2 1/2006 1.62 0.15 <l 7.7 3.320 14.20 5.93 17.90 11/10/2007 1.34 0.30 <I 7.7 5.3 00 19.60 11.00 3 7.00 11/22/2008 1.37 0.35 I 8.0 3.600 13.40 6.30 25.80 10/6/2009 1.84 0.29 2 7.9 3.906 14.45 7.40 30.0 1 12/2/2010 2.16 0.25 <1 8.0 4.000 17.40 7.66 25.60 1011712011 1.19 0.19 2 7.8 3.900 13.80 7.3 6 24.80 11114/2012 2.51 0.34 <1 8.1 4.490 13.00 8.02 3 2.70 12116/201 3 1.60 <I <I 7.8 5.610 21.80 14.20 36.00 1217/2000 1.03 0.25 <I 7.6 1.720 8.35 2.29 8.3 3 6/15/200 I 0.54 0.10 <I 7.8 1.020 4.74 2.18 4.27 11/20/2002 0.68 <0.6 <I 7.7 2.400 11.70 5.3 4 11.60 11/18/200 3 1.00 0.18 <I 7.8 2.970 15.50 5.67 17.30 11/9/2004 1.15 0.38 <I 7.6 3.440 1 5.90 9.3 1 1 9.30 11/5/2005 1.00 0.30 I 8.0 4.500 1 8.70 1 0.50 147.00 1 0/2 1/2006 1.05 0.14 <1 7.8 3.500 13.90 6.17 19.70 11110/2007 1.30 0.39 <I 7.6 4.670 20.3 0 10.60 26.40 11/22/2008 1.27 0.3 3 3 7.9 3.600 14.80 7.10 2 3.1 0 10/6/2009 1.52 0.28 2 7.8 4.271 16.22 7.79 28.20 1 2/2/20 1 0 1.95 0.24 <I 8.0 3.9 1 0 17.00 8.06 24.40 10/17/2011 0.86 0.18 2 7.8 4.660 14.20 7.77 33.3 0 11/14/2012 1.58 0.24 <I 7.9 3.950 14.40 7.64 25.00 12116/20 1 3 1.20 <1 <l 7.8 5.870 22.70 16.40 38.90 B-16 SA R (ratio) 3.40 4.84 3.53 5.69 5.67 4.3 3 6.13 6.31 6.09 6.71 6.58 10.10 5.69 5.00 3.84 3.60 4.97 6.05 7.07 8.09 5.64 9.46 8.22 8.53 7.23 7.62 10.10 8.50 3.71 2.3 0 3.97 5.32 5.43 3 8.50 6.22 6.72 6.98 7.85 6.89 10.00 7.5 3 8.80 Cl S04 (mg/kg) (mg/kg) 26 98 1 23 500 13 300 55 590 IOI 1 90 51 460 1 09 1020 85 600 80 500 147 1059 IO I 9 1 0 202 940 69 2 100 51 1 3 10 46 290 109 500 1 4 600 82 710 155 200 94 420 142 900 187 900 11 4 11 30 243 1 405 102 850 177 950 195 3 700 133 1 530 36 2 10 67 400 34 1000 106 570 1 37 220 1 97 580 1 26 780 17 4 670 184 1220 279 972 154 1360 179 570 302 1600 139 2590 Table 8.1-5. Irrigation Soil Analyses, 2000-2013 , for Section 33 Center P i vot (con t.) Sample Site P-4 P-5 P-5-7 P-7-9 P-9-1 I P-11-13 Date 10/6/2009 12/2/2 010 10/17/2011 11/14/2012 12/16/2013 10/6/2009 12/2/2 010 10/17/20 11 11/14/2012 12/16/2013 10/6/2009 12/2/2010 1011712011 11/14/2012 12/16/2013 10/6/2009 12/2/2010 10/17/2011 11/14/2012 12/16/2013 I 0/6/2009 12/2/2010 10117/2011 11/14/2012 12/16/20 13 10 1 6 12 009 12/2/2010 10117/20 11 11/14/2012 12/16/2013 P-13-15 I 0/6/2009 12/2/2010 I 0117/201 I 11/14/2012

12/16/2013 P-1 5-17 I 0/6/2009 12/2/2010 I 0117/201 I 11114/2012 12/16/2013 U Se Mo (mg/kg) (mg/kg) (mg/kg) 1.32 0.27 2 1.52 0.2 6 <I 0.66 0.18 2 1.55 0.37 <I 1.40 <I <I 1.20 0.27 2 1.79 0.33 <I 0.79 0.17 2 1.20 0.2 4 <I 1.50 <I <I 0.95 0.2 0 2 0.89 0.16 <I 0.51 0.10 2 1.02 0.18 <I <I <I <I 0.85 0.22 2 0.67 0.10 <I 0.48 O.Q7 2 0.49 <0.05 <I <I <I <I 0.93 0.19 2 0.67 0.10 I 0.58 0.11 2 0.62 0.06 <I <I <I <I 0.96 0.12 I 0.56 0.10 <I 0.52 0.10 2 0.54 0.08 <I <I <I <I 0.80 0.14 I 0.61 0.10 <I 0.43 0.12 3 0.59 0.1 3 <I <I <I <I 0.83 0.19 I 0.84 0.1 2 <I 0.50 0.10 2 0.52 0.11 <I <I <I <I pH Cond. Ca Mg Na (units) mmhos/crr (meq/I) (meq/l) (me q/l) 7.8 4.113 17.19 7.87 24.92 8.0 3.750 18.90 7.76 20.80 7.8 3.150 13.90 6.25 17.40 7.9 3.650 17.20 7.90 19.20 7.6 4.580 25.40 11.20 16.70 7.9 3.426 14.81 7.20 19.76 8.0 3.720 17.10 7.85 21.00 77.0 3.030 15.10 7.89 14.20 7.8 2.660 17.10 7.14 7.64 7.5 5.030 35.30 12.40 11.70 7.9 2.799 11.03 5.33 17.07 8.0 2.640 1 2.50 5.72 13.00 7.9 1.040 4.16 1.88 4.11 7.9 2.040 12.70 4.97 6.13 7.6 2.630 15.60 5.40 7.30 7.8 2.198 11.01 5.23 10.78 8.1 1.850 8.26 3.23 8.05 8.1 1.42 3.76 2.77 7.36 8.1 0.649 2.96 0.97 2.08 7.7 1.49 7.59 2.50 5.62 7.9 2.086 1 3.89 6.24 6.12 7.9 2.680 13.10 4.05 4.63 7.9 2.800 9.66 7.28 14.10 8.0 0.632 2.78 0.97 2.36 7.6 1.670 9.24 3.00 5.63 8.0 1.449 9.2 5 4.13 2.86 8.0 1.140 6.69 1.86 2.70 7.9 1.15 4.36 2.27 4.68 8.0 1.59 8.60 3.32 6.01 7.6 1.82 9.67 3.20 6.22 8.0 1.4 3 5 9.42 4.24 2.72 8.0 1.440 9.12 2.58 3.4 7 7.5 1.420 6.54 3.23 5.67 7.8 1.250 7.73 3.26 2.64 7.7 1.3 10 6.05 2.60 4.85 8.0 1.847 14.18 5.62 3.13 8.0 1.380 9.83 2.73 3.17 7.7 1.710 8.29 3.88 6.75 7.9 0.749 3.58 1.62 1.89 7.8 2.160 9.65 4.90 8.04 NOTE: 2000 Sample: I = 0 -6 inches , 2 = 6 -18 inches and 3 = 18 -36 inches 2001 through 2008 Sample: I = 0 -I ft , 2 = I -2 ft and 3 = 2 -3 ft; BG samp l es are back g round. B-17 SAR (ratio) 7.17 5.70 5.48 5.42 3.90 6.10 5.95 4.19 2.19 2.40 5.78 4.31 2.37 2.06 2.30 3.71 3.36 4.07 1.48 2.50 1.97 1.58 4.84 1.74 2.30 1.20 1.31 2.57 2.46 2.50 1.1 1 1.43 2.57 1.13 2.30 I.OJ 1.26 2.74 1.17 3.00 Cl S04 (mg/kg) (mg/kg) 258 911 170 870 93 670 550 2300 531 982 163 884 167 1640 89 300 299 860 612 1210 145 696 91 670 133 600 212 870 227 407 85 557 72 400 126 350 90 620 29 204 86 619 59 370 87 420 110 700 35 251 83 393 51 270 122 670 47 340 60 251 90 329 36 180 52 420 120 360 42 208 70 345 30 160 44 360 161 250 118 305 I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I 1 1 I Table B.1-6. Irrigation Soil Analyses, 2000-2013, for Section 33 Flood Area S ampl e u Se Mo p H Co nd. Ca Mg Na SAR C l S it e Dat e (m g/kg) (m g/kg) (m g/k g) (unit s) mmh os/crr (m e q/I) (m e q/I) (m e q/I) (rati o) (m g/kg) SECTIO N 33 FLOOD F-1 11/5/2004 1.78 0.56 <I 7.6 2.8 1 0 1 9.1 0 7.2 1 1 1.30 3.1 1 114 1 1/8/2005 1.35 0.3 1 1 7.8 2.690 1 6.80 6.23 1 0.20 3.0 1 66 1 0/28/2006 1.7 6 0.41 <I 7.8 1.480 8.25 2.91 4.79 2.03 72 11/1 0/2007 1.69 0.45 <I 7.8 2.000 9.35 3.60 8.85 3.48 98 1 2/3/2008 1.7 0 0.43 2 8.0 1.7 80 7.42 2.68 11.20 4.98 8 9 1 0/5/2009 1.1 7 0.10 <I 8.1 0.493 1.37 0.48 3 03 3.1 5 1 20 11/30/2010 1.8 4 0.36 I 8.0 1.6 1 6.69 2.73 7.75 3.57 1 50 1 0/18/2011 1.63 0.33 2 7.7 1.7 1 7.98 3.23 7.35 3.1 0 201 F-2 11/5/2004 1.67 0.47 I 7.7 2.360 1 3.70 5.09 10.40 3.39 11 5 11/8/2005 1.1 4 0.24 <I 7.8 2.260 13.30 4.68 9.22 3.08 57 10/28/2006 1.24 0.26 <I 7.7 2.320 1 6.00 5.15 8.33 2.56 46 11/10/200 7 1.55 0.40 <I 7.8 3.0 70 1 6.9 0 6.58 1 3.00 3.79 63 1 2/3/2008 1.53 0.39 <I 7.7 2.650 21.7 0 7.48 1 3.7 0 3.59 46 1 0/5/2009 1.17 0.0 9 <I 8.1 0.727 1.9 8 0.85 4.15 3.49 80 11/30/2010 1.96 0.41 <I 7.9 1.1 7 4.63 1.7 6 5.6 1 3.14 1 5 0 10/18/201 1 1.53 0.33 3 7.6 1.64 1 0.50 3.62 5.50 2.07 1 63 F-3 11/5/2004 1.68 0.49 <I 7.7 2.400 18.40 6.52 11.60 3.28 11 5 11/8/2005 1.0 0 0.20 <I 7.8 2.670 17.80 5.9 1 1 0.70 3.1 1 4 1 1 0/28/2006 1.62 0.2 1 <I 7.7 1.840 10.90 3.38 5.93 2.22 52 1 1/1 0/2007 1.5 1 0.40 <1 7.7 2.0 1 0 11.50 4.06 7.97 2.86 52 1 2/3/2008 0.96 0.23 <I 7.7 2.890 19.90 6.91 1 2.00 3.28 50 1 01512009 0.67 0.0 8 3 8.2 0.705 2.1 3 0.98 4.1 0 3.29 80 1 1/30/2010 1.76 0.41 3 7.6 2.53 1 5.1 0 5.18 9.79 3.0 7 1 84 10/1 8/20 11 1.62 0.30 2 7.6 1.89 1 0.90 4.22 6.74 2.45 10 6 F-4 10/5/2009 0.38 <0.0 5 <I 8.5 0.528 1.23 0.86 2.87 2.8 1 70 11/30/20 1 0 0.32 <0.05 I 7.5 2.28 1 5.6 0 3.8 1 7.78 2.50 40 10/18/20 11 0.4 1 0.06 I 7.6 2.04 1 3.1 0 3.42 7.94 2.76 6 1 F-5 1 0/5/2009 0.33 <0.05 <1 8.4 0.538 1.22 1.02 2.8 1 2.66 50 11/30/2010 0.40 <0.0 5 <I 7.5 2.65 20.40 4.68 8.77 2.48 2 1 1 0/1 8/201 1 0.26 <0.05 2 7.6 1.35 6.76 1.7 1 6.66 3.24 28 F-5-7 1 0/5/2009 0.35 <0.05 <l 8.4 0.7 1 1.57 1.57 3.65 2.91 60 11/30/20 1 0 0.2 0 <0.05 <I 7.7 1.9 1 13.20 3.07 7.1 0 2.49 2 1 1 0/1 8/20 11 0.1 3 <0.05 <I 8.1 0.502 2.4 1 0.53 2.43 2.00 18 F-7-9 1 0/5/2009 0.27 <0.0 5 <I 8.6 0.44 I.O J 0.86 2.1 9 2.26 20 11/30/20 1 0 0.1 9 <0.05 <I 7.9 0.837 3.22 0.78 4.54 3.2 1 30 10/1 8/20 11 0.1 9 <0.05 I 8.0 0.7 1 7 3.4 1 0.8 1 3.25 2.24 20 F-9-11 10/5/2009 0.5 2 0.06 <I 8.5 0.53 4 1.1 3 1.00 2.78 2.69 4 0 11/30/20 1 0 0.23 <0.05 <I 8.0 0.733 3.02 0.8 0 3.7 1 2.68 3 8 10/1 8/20 11 0.2 1 <0.05 <I 8.1 0.62 8 2.7 0 0.69 2.8 6 2.20 3 7 F-11-13 11/3 0/20 1 0 0.27 <0.05 <I 8.1 0.569 2.35 0.65 2.79 2.28 40 1 0/18/201 1 0.2 1 <0.05 2 8.2 0.43 1.9 1 0.48 1.88 1.72 1 9 NOTE: 2000 Sam pl e: I = 0 -6 i n c h es, 2 = 6 -1 8 in ches an d 3 = 1 8 -36 inc h es 200 I throug h 2008 S ampl e: I = 0 -I ft , 2 = I -2 ft an d 3 = 2 -3 ft; BG s ampl es are backgro und. B-18 S04 (m g/kg) 190 12 1 0 1070 450 9 1 0 <50 840 820 150 620 970 390 1 670 <50 890 850 1 50 350 970 470 860 500 1070 920 680 430 400 500 750 290 500 350 1 58 1 70 220 174 230 240 200 250 120 Sample Site F-1 F-2 F-3 T able 8.1-7. Irrigation Soil Analyses , 2000-2013 , for Sect i on 34 Flood Area U Se Mo pH Cond. Ca Date (mg/kg) (mg/kg) (mg/kg) (units) mmhos/crr (meq/l) ------SECTION 34 FLOOD 1217/2000 3.35 0.68 <l 7.7 2.594 11.95 8/8/2001 2.72 0.50 2 7.8 5.090 10.90 I 1/22/2002 0.69 <0.6 <l 7.9 1.050 4.73 I I/26/2003 3.72 0.82 I 7.8 4.570 22.50 I I/4/2004 4.43 1.15 2 7.7 5.220 20.50 I I/I9/2 005 3.94 1.10 2 8.0 5.420 20.80 10/28/2006 4.88 0.95 <I 7.9 3.500 I2.20 11/10/2007 5.02 1.32 2 7.8 4.910 17.50 12/3/2008 4.38 1.14 1 7.7 4.430 19.40 10/8/2009 4.06 0.97 4 7.8 4.64 19.34 1 I/5/20IO 4.64 1.05 5 7.8 4.11 I8.90 10/19/201 I 5.I5 1.0 3 2 7.9 3.1 3 1 2.40 1 I/13/20I2 4.67 0.88 1 7.9 3.96 14.80 12/18/20I3 4.70 1.20 <1 7.8 6.56 25.80 I2/7/2000 2.22 0.37 <I 7.6 3.237 14.42 8/8/2001 1.88 0.40 2 7.6 4.970 8.20 I 1/22/2002 0.46 <0.6 <I 8.0 1.030 3.85 I 1/2612003 1.90 0.40 <I 7.8 5.020 25.20 11/4/2004 2.27 0.63 <I 7.6 5.370 23.80 1 I/19/2005 1.41 0.38 I 7.9 4.890 20.50 I0/28/2006 2.25 0.45 <I 7.6 3.610 I 2.90 11/10/2007 3.05 0.94 <I 7.7 5.770 21.20 I2/3/2008 2.70 0.68 I 7.8 4.240 21.60 10/812009 2.59 0.63 3 7.8 4.62 20.06 11/5/2010 2.83 0.57 3 7.7 4.56 22.10 10/19/20 11 2.90 0.57 <I 7.7 4.I4 16.00 I 1/13/20 I2 2.78 0.52 <I 7.8 2.64 9.99 12/18/2013 3.10 <I <I 7.6 6.83 28.30 1217/2000 1.62 0.03 <I 7.6 3.397 1 3.63 8/8/2001 1.15 0.30 <I 7.6 5.960 IO.IO 11/22/2002 0.42 <0.6 <l 8.0 0.930 3.63 11/26/2 003 1.08 O.I9 <I 7.8 4.420 23.90 l I/4/2004 1.40 0.37 <I 7.6 4.800 25.30 I I/I 9/2005 2.62 0.68 2 8.0 4.550 1 7.40 10/28/2006 1.21 0.28 <I 7.5 3.860 18.50 11/10/2007 1.75 0.64 <I 7.6 5.280 24.20 I2/3/2008 1.71 0.37 <I 7.8 4.410 23.00 10/8/2009 1.82 0.46 3 7.7 4.66 23.09 11/5/2010 1.96 0.39 2 7.7 4.09 24.40 I0/19/2011 1.13 0.22 <1 7.4 4.90 21.60 1 I/I3/20I2 1.40 0.24 <l 7.8 3.46 13.30 12/18/2013 1.40 <I <I 7.6 7.2 1 33.90 B-19 Mg Na (meq/l) (meq/l) 4.66 14.58 3.1 7 13.50 1.47 5.26 9.62 3I.60 8.98 40.40 8.64 37.60 5.72 22.90 8.05 35.00 9.10 33.40 8.50 30.29 8.52 24.30 5.74 19.00 6.75 27.30 I0.80 49.50 6.01 I8.58 2.25 8.57 1.12 6.06 8.0I 33.60 7.90 40.50 5.55 32.60 4.34 23.30 8.24 40.60 8.16 30.00 . 7.64 29.49 6.32 26.60 6.23 26.30 3.74 15.50 9.30 50.IO 5.02 22.21 3.25 9.83 1.5 3 4.90 6.53 25.80 7.39 34.90 5.78 32.90 5.I8 23.20 6.25 32.70 8.99 32.50 7.41 26.5 I 5.54 20.10 7.64 30.30 4.05 22.60 8.20 46.70 SAR (ratio) 5.03 5.09 2.99 7.89 I0.52 9.80 7.65 9.79 8.85 8.03 6.56 6.31 8.32 I 1.60 5.85 3.75 3.84 8.25 10.1 7 9.03 7.94 I0.60 7.78 7.85 7.06 7.89 5.92 11.50 6.75 3.80 3.05 6.61 8.63 9.66 6.74 8.38 8.I3 6.83 5.I9 7.92 7.67 I0.20 Cl S04 (mg/kg) (mg/kg) ---56 767 I82 900 I8 800 284 2620 398 680 4I6 5190 445 52IO 429 4400 392 7700 279 4002 2I9 7000 254 7700 317 7900 276 4450 78 1497 1 39 I400 IO 200 396 2480 390 370 352 3980 478 4230 560 4000 406 4900 388 4082 236 3600 456 8200 373 6300 465 3840 56 980 I70 1800 3 <1 00 302 I550 I66 210 560 5840 302 2340 337 I700 227 I810 430 3362 256 1500 301 3400 459 3300 565 2210 I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I Table B.1-7. Irrigation Soil Analyses, 2000-2013, for Section 34 Flood Area Sample Site F-4 F-5 F-5-7 F-7-9 F-9-11 F-11-13 F-13-1 5 Date 10/8/2 009 11/5/20 I 0 10/19/2011 11/13/2012 12/18/2013 10/8/2009 11/5/20 10 10/1 9/2011 11/1 3/2012 1 2/18/2013 10/8/2009 11/5/20 1 0 10/1 9/20 11 11/1 3/20 1 2 12/18/2013 I 0/8/2009 1 1/5/2010 10/19/20 1 1 11 113/2012 1 2118/20 1 3 I 0/8/2009 11/5/2010 10/19/2011 11/13/2012 1 2/18/2013 I 0/8/2 009 11/5/2010 10/1 9/2011 11/13/2012 12/18/2013 10/8/2009 U Se Mo (m g/kg) (mg/kg) (mg/kg) 0.95 0.2 1 3 0.87 0.13 2 0.8 1 0.07 1 0.8 8 0.12 <I <1 <1 <I 0.56 0.08 2 0.59 0.09 2 0.44 <0.05 <I 0.50 0.07 <I <I <I <I 0.35 0.05 I 0.44 0.09 I 0.36 <0.05 2 0.37 <0.05 <I <I <I <I 0.36 0.05 2 0.47 0.07 2 0.38 <0.05 2 0.37 <0.05 <1 <I <I <I 0.52 0.10 2 1.12 0.22 2 0.73 0.12 <I 0.96 0.10 <I 3.4 0 <I 4 1.06 0.11 2 0.72 0.13 2 0.68 0.06 2 1.24 0.11 <I <I <I <I 0.6 1 0.10 2 pH Cond. Ca Mg Na (units) mmhos/crr (me q/I) (meq/I) (meq/I) 7.7 3.49 19.12 5.37 1 7.90 7.6 3.33 20.00 6.07 1 5.50 7.4 4.96 23.50 7.93 27.50 7.7 4.29 2 1.40 6.41 25.40 7.5 5.49 28.30 7.70 3 1.70 7.8 3.11 15.88 4.81 15.79 7.6 3.66 26.00 7.46 15.80 7.6 3.78 20.70 8.38 1 7.1 0 7.7 3.30 19.00 5.58 16.40 7.6 4.58 26.10 8.50 22.80 8.1 1.92 9.7 1 3.13 9.09 7.8 1.83 8.66 3.48 9.02 7.8 7.79 16.3 0 7.93 11.20 7.9 1.19 4.9 1 1.78 5.82 7.7 2.40 I I.IO 4.10 1 0.80 8.1 1.27 4.42 1.77 6.69 7.8 1.46 6.0 1 2.40 7.70 8.1 8.05 3.64 2.09 5.03 7.6 1.6 3 6.3 1 3.19 8.10 7.7 1.78 6.03 2.90 9.9 1 7.9 1.70 7.56 3.13 8.10 7.6 2.84 16.40 9.50 I I.I Q 7.7 7.73 11.70 6.27 9.67 7.8 2.18 12.2 0 6.90 8.3 1 7.6 3.94 24.90 12.80 1 5.00 7.9 2.3'2 12.66 7.85 8.29 7.7 1.93 8.38 5.34 8.3 1 7.6 7.64 1 3.6 0 7.47 8.55 7.8 3.21 19.7 0 12.50 11.1 0 7.5 4.08 25.50 11.80 1 7.1 0 7.9 1.5 1 8.60 2.4 1 5.93 NOTE: 2000 Sample: 1 = 0 -6 inches , 2 = 6 -18 i n ches and 3 = 18 -36 inches 200 1 throu gh 2008 Samp l e: I = 0 -I ft, 2 = I -2 ft and 3 = 2 -3 ft; BG samp l es are backgrou n d. B-2 0 SAR (ratio) 5.32 4.29 6.94 6.81 7.50 4.9 1 3.86 4.48 4.68 5.50 3.90 3.66 3.22 3.18 3.90 4.06 3.75 2.97 3.72 4.70 3.78 3.0 8 3.23 2.69 3.50 2.8 5 3.17 2.63 2.77 3.90 2.53 Cl S04 (m g/kg) (mg/kg) 268 2 1 5 1 1 25 780 309 1700 287 2400 209 1340 1 38 861 67 1800 1 99 1500 1 71 860 1 54 660 70 459 33 184 87 730 111 420 62 207 76 568 50 260 56 1 77 11 6 430 30 1 87 6 1 540 69 400 45 430 97 1 560 48 1 390 76 1506 47 260 3 1 460 69 2800 48 1940 50 490 Table B.1-8. Irrigation Soil Meteoric Water Mobility Test Results, 2015, for Sections 33 and 34 Sam pl e S it e I 2 3 4 s 6 7 8 9 I O II 1 2 1 3 1 4 IS 1 6 17 Sample Site I 2 3 4 s 6 7 8 9 10 II 1 2 1 3 14 IS 16 17 18 19 20 21 22 23 24 2S 26 27 28 29 30 31 32 33 Date 8/2S/20 I S 8/2S/20 I S 8/2S/201S 8/2S/201S 8/2S/201S 8/2S/201S 8/2S/20 1 S 8/2S/20 1 S 8/2S/20 1 S 8/2S/20 IS 8/2S/20 IS 8/2S/201S 8/2S/20 IS 8/2S/201S 8/2S/201S 8/2S/201S 8/2S/20 1 S Date 8/2 1/20 1 s 8/2 1/20 IS 8/21/201S 812 1/201 s 8/2 1/20 1 S 8/2 1/20 I S 8/2 1/20 I S 8/2 1/20 1 S 8/2 1/20 I S 8/21/201S 8/2 1/201S 8/2 1/20 I S 8/2 1/20 I S 8/2 1/20 I S 8/2 1/201S 812 1/20 IS 8/2 1/20 1 S 8/2 1/20 I S 8/2 1/20 IS 8/2 1/20 I S 8/21/20 IS 8/2 1/20 IS 8/21/20 I S 8/21/20 IS 8/21/20 I S 8/2 1/20 I S 8121/20 I S 8/21/20 I S 8/2 1/20 I S 8/2 1/2 0 I S 8/2 1/20 I S 8/21/20 1 S 8/2 1/20 I S u (m g/I) 0.0468 0.0360 0.0089 O.OOS7 O.OOS2 0.0021 0.00 18 0.0026 0.0010 0.00 1 4 0.002 1 O.OO I S 0.00 1 3 0.00 1 4 0.00 1 4 O.OOIS 0.00 1 0 u (mg/I) O.OISI O.OOS6 0.0038 0.0032 0.0036 0.00 16 0.00 1 2 0.0012 0.0016 0.0018 0.0022 0.002S 0.0024 0.002 7 0.0030 0.0033 0.0023 0.0029 0.0023 0.002 7 0.002S 0.0028 0.0023 0.002S 0.0022 0.00 19 0.00 17 0.0018 0.00 17 0.0017 0.00 18 0.00 1 3 0.0 018 Se (mg/I) Mo (m g/I) pH (unit s) Ni trate/ Nitr it e (mg/I) SEC TION 33 CEN T E R PI VOT 0.0437 0.026S 0.08S7 0.069 1 0.08SO 0.0209 0.0086 0.0098 0.0091 0.0079 0.0 1 28 O.OOS8 0.0067 0.0073 O.O OS6 O.OISO 0.0 1 30 Se (m g/I) 0.02 <0.02 <0.02 <0.02 <0.02 <0.02 <0.02 <0.02 <0.02 <0.02 <0.02 <0.02 <0.02 <0.02 <0.02 <0.02 <0.02 Mo (mg/I) 7.89 7.94 7.97 8.11 7.87 7.96 8.1 9 8.28 8.04 8.1 0 7.98 8.26 8.03 8.26 8.20 8.24 8.20 pH (unit s) SEC TIO N 33 FLO OD 0.0084 <0.02 8.00 0.0088 <0.02 8.03 0.0068 <0.02 8.1 2 0.0041 <0.02 8.20 0.0036 <0.02 8.S4 0.00 43 <0.02 8.S3 0.003 1 <0.02 8.7 3 0.00 1 6 <0.02 8.93 0.0018 <0.02 8.99 0.00 1 6 <0.02 8.87 0.00 1 3 <0.02 8.9S O.OOIS 0.02 8.88 0.00 1 4 O.OS 8.6 7 0.0014 0.04 8.73 O.OOIS 0.04 8.7S 0.0014 0.03 8.76 O.OOIS 0.03 8.S6 0.0018 0.03 8.72 0.00 18 0.02 8.6S 0.0019 0.02 8.67 0.0020 0.02 8.63 0.0019 0.03 8.39 O.O OIS 0.03 8.42 0.00 18 0.02 8.31 0.0012 0.02 8.48 0.0023 0.03 8.36 0.00 17 0.03 8.46 0.00 17 0.03 8.57 0.00 17 0.02 8.6 1 O.OO I S <0.02 8.69 O.OO IS 0.02 8.68 0.0020 <0.02 8.81 0.00 11 <0.02 8.93 B-21 22.90 12.40 2.22 0.70 O.SO 0.4S 0.2S 0.28 0.22 0.40 0.78 0.6S 0.80 0.92 0.62 0.26 0.4 1 itrate/ N itrite (mg/I) 2.2 1 2.22 1.07 0.23 0.02 <0.02 <0.02 0.04 <0.02 <0.02 0.09 <0.02 <0.02 <0.02 <0.02 0.02 0.02 <0.02 <0.02 <0.02 0.08 <0.02 0.03 <0.02 <0.02 <0.02 0.04 <0.02 0.06 0.09 <0.02 0.06 0.02 TDS (mg/I) 2240 2180 2140 1 360 2020 730 342 344 266 264 1460 448 384 380 328 316 278 TDS (mg/I) 492 808 808 S08 424 326 222 1 78 IS2 16 6 170 18 4 1 90 172 1 92 188 2 16 202 206 2 1 2 214 224 224 2 1 8 208 240 240 236 200 2 1 2 222 1 90 1 28 C l S04 (m g/kg) (mg/kg) I l S.O 1 2SO 1 26.0 1260 243.0 1060 238.0 S80 312.0 9SO 189.0 240 S6.2 130 4S.9 1 40 36.S 100 32.0 110 43.0 840 28.S 230 20.9 1 80 22.0 210 32.1 I SO 49.7 1 20 40.9 11 0 Cl S04 (m g/kg) (mg/kg) 28.1 390 S7.8 890 41.S 460 19.9 280 IS.S 230 17.7 1 60 11.9 90 7.9 so 7.9 40 8.3 so 7.0 60 8.2 60 6.6 so 6.8 so 7.S 60 7.0 60 8.7 70 8.2 60 9.7 7 0 9.2 7 0 9.0 70 9.7 80 8.8 80 9.6 70 8.8 90 9.7 1 00 1 0.6 1 00 IO.I 1 00 8.8 90 9.1 90 9.3 90 7.6 70 4.4 60 I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I Table B.1-8. Irrigation Soil Meteoric Water Mobility Test Results , 2015, for Sections 33 and 34 Samp l e Site 1 2 3 4 5 6 7 8 9 10 1 1 12 13 14 15 16 17 18 19 20 2 1 22 23 24 25 26 27 28 29 30 31 3 2 33 34 35 Date 8/20/2015 8/20/2015 8/20/2015 8/20/2015 8/20/20 1 5 8/20/2 015 8/20/2015 8/20/2015 8/20/20 1 5 8/20/20 1 5 8/20/20 1 5 8/20/20 1 5 8/20/2015 8/20/2015 8/20/20 1 5 8/20/2015 8/20/20 1 5 8/20/2015 8/20/2015 8/20/2015 8/20/2015 8/20/2015 8/2 0/20 1 5 8/20/20 1 5 8/20/20 1 5 8/20/2015 8/20/2015 8/20/20 1 5 8/20/20 1 5 8/20/20 1 5 8/20/20 1 5 8/20/2015 8/20/2015 8/20/20 1 5 8/2 0/20 1 5 u (m g/1) 0.0996 0.0526 0.039 1 0.020 1 0.0 1 44 0.0071 0.0068 0.0050 0.0040 0.0043 0.0052 0.0060 0.0079 0.0060 0.0056 0.0059 0.007 1 0.0064 0.005 1 0.0053 0.0044 0.0043 0.006 0 0.0 0 56 0.0036 0.0025 0.0029 0.0025 0.002 1 0.0023 0.0026 0.0027 0.0030 0.0027 0.0025 Se (mg/1) Mo (mg/1) pH (units) SEC TIO N 34 FL OOD 0.0227 <0.02 7.75 0.0242 <0.02 7.74 0.0 1 28 <0.02 7.78 0.0086 <0.02 7.81 0.006 3 <0.02 8.09 0.0035 <0.02 8.34 0.0034 0.02 8.50 0.0027 0.02 8.49 0.0028 0.02 8.7 1 0.0027 0.03 8.68 0.0047 0.04 8.53 0.0052 0.04 8.25 0.0066 0.03 8.3 3 0.0069 0.03 8.42 0.0072 0.03 8.41 0.0061 0.03 8.40 0.0068 0.03 8.53 0.0053 0.03 8.63 0.0057 0.02 8.61 0.0057 <0.02 8.68 0.0055 0.02 8.65 0.0066 <0.02 8.73 0.0 052 0.03 8.74 0.0048 0.02 8.64 0.0056 0.02 8.66 0.0060 0.03 8.44 0.0060 <0.02 8.3 8 0.0052 0.02 8.66 0.0050 0.02 8.76 0.0055 0.02 8.62 0.0064 0.02 8.72 0.0061 0.03 8.69 0.0067 0.02 8.66 0.0048 0.03 8.64 0.0 0 5 0 <0.02 8.67 B-22 N i trate/ Ni trit e (m g/1) 9.60 5.87 3.1 6 0.39 0.1 7 <0.02 <0.02 <0.02 <0.02 <0.02 <0.02 <0.02 0.1 2 0.09 <0.02 <0.02 <0.02 <0.02 <0.02 <0.02 <0.02 <0.02 <0.0 2 <0.02 <0.02 0.65 0.53 0.05 0.02 <0.02 <0.02 <0.02 <0.02 <0.02 <0.02 TDS (m g/I) 2640 4500 3660 3130 1590 778 450 376 302 4 1 2 462 970 588 468 418 384 394 390 420 380 364 344 358 494 438 460 772 332 322 308 326 338 392 384 420 Cl S04 (mg/kg) (mg/kg) 1 07.0 1430 255.0 2750 269.0 2 1 70 2 1 2.0 1740 1 3 1.0 860 70.4 390 31. I 2 1 0 27.1 1 70 25.4 120 29.6 2 0 0 47.6 220 60.4 540 53.6 280 46.9 190 40.6 150 43.1 1 60 37.2 160 30.6 190 20.4 2 1 0 20.5 180 11.8 250 1 2.2 170 1 9.3 170 1 9.8 250 1 6.6 250 1 6.7 240 1 9.1 450 1 5.6 1 50 1 7.0 1 60 17.8 1 30 23.3 150 24.8 160 28.5 190 23.7 200 28.7 2 10 (JJ' u "' 't :I Ill c "' ..... 3: 0 Qi co ..c ... 0.0 0 1 2 3 4 5 6 7 8 9 g. 10 0 11 12 13 14 15 16 17 Figure B.2-1. Section 28 Soil Uranium Concentrations vs. Depth Ur an i um C on c entra t ion (mg/k g) 1.0 2.0 3.0 4.0 5.0 I /,' I (' ' l ' I (/ I I \ \ I f Backgro u nd -2006 -2008 -2010 -2012 I ' ' l I ' B-23 I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I 0 1 2 3 4 5 6 7 w u res -... ::s VI "C 8 c res _, 3 9 0 Qi al ..c ... 10 0 11 12 13 14 15 16 17 0.0 0.1 0.2 Fi gur e B.2-2. Section 28 Soil Selenium Concent r ation s vs. Depth Se l en iu m Conce nt ra t i on (mg/k g) 0.3 0.4 0.5 0.6 0.7 0.8 0.9 1.0 1.1 B-24 1.2 Backgr ound -2006 -2008 -2010 -2012 I Table B.2-1. Pre-Operational and Background Soil Sample Results for Section 28 I Locat i on ID I I I Natural U ranium I Selenium I C h l oride I Co mment Interval (ft) Area Depth (in) I (pCi/g) I mg/kg I mg/kg (mg/kg) S28*2 U ntr ea ted 0-40 @1.0 6 @I.57 0.14 ----I998 S28-3 U ntreated 4-22 0.23 0.34 0.18 ----I998 I S28-9 Treated 0-40 0.33 0.49 0.06 ----1 998 NE27-I U ntreated 0-6 0.34 0.50 O.D3 ----*1 998 NE28-2 Untreated 0-6 0.24 0.35 0.03 ----*1 998 NE28-4 Untreated 0-8 O. I 3 0.19 O.I6 ----I 998 NE28-5 U ntreated 0-12 0.50 0.74 0.IO ----I 998 I NE2 8-7 U ntreated 0-8 0.5I 0.75 O.I 2 ----1998 0-1 BG-I Untreated 0-12 2.02 @2.99 I4 #2002 BG-I U ntreated 0-12 0.35 0.5I 0.15 6 2003 BG-I U ntreated O-I2 0.60 0.88 0.22 I2 2004 BG-I U ntreat ed 0-1 2 0.32 0.47 0.1 2 @283 2005 I BG-I U ntreated 0-12 0.42 0.62 0.10 1 9 2006 BG-I U ntr eated 0-12 0.53 0.78 0.23 32 2007 BG-I Untreated 0-12 0.40 0.59 0.15 @220 2008 BG-I U n treated 0-1 2 0.75 I.II 0.16 60 2009 I BG-I U ntreated 0-12 0.44 0.65 0.16 30 2010 Mean 0.4 I 0.60 0.13 24.71 SDV 0.16 0.23 0.06 1 8.19 CV 38.87 38.90 45.51 74 I Locat i o n ID I I I Na tural Urani um I Se l enium I C hlorid e I Co mment Interval (ft) Area Deoth (in) I (oCi/Q) I m l!/l rn I mg/kg (mg/ko) S28-2 U n treated 0-40 @I.06 @1.57 0.14 ----1998 S28-3 U n treated 4-22 0.23 0.34 0.18 ----1 998 I S28-9 Treated 0-40 0.33 0.49 0.06 ----1 998 NE28-4 U ntreated 8-28 0.23 0.34 0.03 ----*1 998 NE28-7 U ntreated 8-24 0.23 0.34 0.05 ----1 998 BG-2 U ntr ea t ed 1 2-24 @11 0 @1.62 13 #2002 1-2 BG-2 Untreated 1 2-24 0.41 0.6 1 0.10 6 2003 BG-2 Untreated 1 2-24 0.52 0.77 0.22 14 2004 I BG-2 U ntreated 1 2-24 0.32 0.47 0.07 ----2005 BG-2 U ntreated 1 2-24 0.35 0.51 0.03 14 2006 BG-2 U ntreated 12-24 0.62 0.91 0.24 26 2007 BG-2 U ntreated 12-24 0.3 1 0.46 0.15 @240 2008 I BG-2 U ntreated 1 2-24 0.39 0.57 0.10 50 2009 BG-2 Untreated 1 2-24 0.27 0.40 0.13 40 20 10 Mean 0.35 0.52 0.11 23.29 SDV 0.1 2 0.18 0.07 1 6.21 I CV 34.20 34.1 9 60.66 70 Lo ca ti on ID I I I Na tural U ranium I Selenium I Chloride I Co mment Int erval (ft) A rea Depth (in) I (pCi/g) I mo/Im I mv/kv (mg/kg) S28-2 Untreated 0-40 @1.06 @1.57 0.14 ----1 998 I S28-9 Treated 0-40 0.33 0.49 0.06 ----1 998 NE27-I U ntr eated 24-80 0.14 0.2 1 0.03 ----*1 998 NE28-4 U ntr eated 28-84 0.22 0.32 0.03 ----*1998 NE28-5 Untreated 25-84 0.44 0.65 O.D3 ----*1998 NE28-7 U ntreated 24-48 0.14 0.2 1 0.03 ----*1 998 I BG-3 U n treated 24-36 @0.98 @1.45 1 3 #2002 2-3 BG-3 Untreated 24-36 0.36 0.53 0.12 I I 2003 BG-3 U n treated 24-36 0.55 0.8 1 0.19 IO 2004 BG-3 U ntr eated 24-36 0.37 0.55 0.07 @290 2005 I BG-3 U ntr ea t ed 24-36 0.39 0.58 0.06 16 2006 BG-3 Untreated 24-36 0.5 4 0.80 0.25 30 2007 BG-3 U ntreated 24-36 0.36 0.53 0.15 @270 2008 BG-3 U ntreated 24-36 0.38 0.56 0.11 70 2009 BG-3 U ntreated 24-36 0.30 0.45 0.13 60 2010 I Mean 0.35 0.51 0.10 30.00 SDV 0.1 3 0.19 0.07 24.99 CV 36.6 1 36.52 70.55 83 I I I B-2 5 I I I Table B.2-1. Pre-Operational and Background Soil Sample Resul t s for Section 28 (cont.) I Com m ent Interval ft Locat i on ID Area De th (in 3-4 BG-4 U ntr eated 36-4 8 2009 BG-4 Untreated 36-48 0.26 0.39 70 20 10 Mean 0.31 0.46 0.08 65.00 I SDV 0.06 0.09 0.0 1 7.07 CV 20.20 20.20 1 7.68 II Comme nt I Interval ft Location ID Area 4-5 B G-5 U ntr ea t ed 0.45 0.06 90 2009 BG-5 Untrea t e d 48-60 0.24 0.36 0.07 80 20 1 0 Mean 0.27 0.41 0.06 85.00 SDV 0.04 0.06 0.01 7.07 I CV 15.7 1 15.7 1 12.06 8 Co mment In terval ft L o cation ID Area 5-7 BG-5-7

• U ntr eated 0.42 0.62 0.08 100 2009 I BG-5-7 U ntreated 60-72 0.29 0.43 0.08 90 20 1 0 Mean 0.36 0.53 0.08 95.00 SDV 0.09 0.13 0.00 7.07 CV 25.59 25.59 000 I Co mm e nt Interval (ft Lo cation ID Area 7-9 BG-7-9 U ntr ea t ed 6 1 2009 BG-7-9 U ntr ea ted 0.30 0.44 0.09 1 40 2010 I Mea n 0.42 0.62 0.09 1 00.50 SDV 0.17 0.25 0.01 55.86 CV 40.24 40.24 8.32 56 Co mment I Interval ft Location ID A r ea 9-11 BG-9-11 U ntr eated 0.35 0.52 0.09 60 2009 BG-9-11 U ntrea ted 96-1 20 0.32 0.48 0.09 40 2 01 0 Mean 0.34 0.50 0.09 50.00 I SDV 0.02 0.03 0.00 14.14 CV 5.66 5.66 0.00 28 Co mment Interval ft Location ID Area I 11-13 BG-11-1 3 U ntre ated 0.97 0.1 2 1 5 2009 BG-11-13 U ntreat ed 0.44 0.65 0.1 2 30 20 1 0 Mean 0.55 0.8 1 0.1 2 22.50 SDV 0.15 0.23 0.00 10.61 CV 27.94 27.94 0.00 47 I Com ment Interval ft Lo c ation ID Area 13-15 BG-13-15 U ntre a t ed 0.60 0.08 70 2 009 I BG-1 3-15 U ntr ea t ed 144-1 68 0.68 0.1 3 50 20 1 0 Mean 0.43 0.64 0.11 60.00 SDV 0.04 0.06 0.04 1 4.14 CV 8.84 8.84 33.67 24 I Co mment Int erval ft Location ID Area 15-17 BG-15-17 U ntreat ed 0.84 0.10 70 2009 BG-1 5-1 7 U nt re at ed 1 68-1 92 0.37 0.54 0.09 40 20 1 0 Mean 0.47 0.69 0.10 55.00 I SDV 0.14 0.2 1 0.0 1 21.21 CV 30.74 30.74 7.44 39 @ = considered an outlier , did not use I *"" 1998 Sc Reported as Jess than LLD of0.05 mg/kg , used 0.0 2 5 # = 2002 Sc MDL= 0.8 A ll d ata reported as< MDL , did not u s e CV= coefficient of varia tion SDV =standard d e viation I I B-26 Table 8.2-2. Background Soil Analyses , 2000-2010 , for Sect i on 28 Center Pivo t Samp l e S i te BG-I BG-2 BG-3 BG-4 BG-5 BG-5-7 BG-7-9 BG-9-1 1 BG-11-1 3 BG-13-15 BG-1 5-1 7 Date 11/19/2002 1 112 4/2003 11111/2004 11115/2005 10/21/2006 11/10/2007 11/22/2008 10/15/2009 11/2/2010 11/19/2002 11/24/2003 11/1 1/2004 11/15/2005 10/2 1/2006 11/10 12 00 7 11/22/2008 10/15/2009 11/212010 11/1 9/2 002 1 112 4/2003 11/11/2004 11/15/2005 10 12 1/2 006 11/10/2007 1 1122/2008 10115 12 009 11/2/2010 10/15/2009 11/2/2 010 10/15/2009 11/2/2010 10/15/2009 1112/20 1 0 10115 1 2009 11/2/2010 10115 1 2009 11/2/20 1 0 1011 5 1 2009 11/2/2010 10/15/2009 11/2/2010 1011512009 11/2/2 010 U Se Mo pH Cond. Ca Mg Na (mg/kg) (mg/kg) (mg/kg) (u n its) mmhos/crr (meq/l) (meq/l) (meq/l) SECT I ON 28 CENTE R P I VOT 2.99 <0.6 2 8.0 0.82 3.33 0.91 4.20 0.51 0.15 <I 7.9 0.33 1.94 0.61 0.30 0.88 0.22 <I 7.4 1.16 6.93 1.99 3.91 0.47 0.12

<l 7.8 1.01 6.37 2.00 2.32 0.62 0.10 2 7.7 0.46 2.41 0.71 0.57 0.78 0.23 <I 7.7 0.7 1 4.19 1.35 0.95 0.59 0.15 I 7.8 0.44 2.56 0.77 0.88 1.11 0.16 2 7.9 0.507 2.83 0.96 1.10 0.65 0.16 <l 7.6 I. I 6.39 2.17 2.68 1.62 <0.6 <l 7.7 2.00 14.90 3.27 6.88 0.61 0.10 <I 8.0 0.35 1.69 0.8 1 0.60 0.77 0.22 <I 7.4 0.66 4.22 1.4 2 . 1.01 0.47 0.07 <I 8.0 0.73 3.71 1.58 1.50 0.51 <.0 5 1 7.8 0.53 2.22 0.95 0.89 0.91 0.24 <I 7.6 0.95 5.95 2.18 1.45 0.46 0.15 I 8.0 0.40 2.11 0.89 0.88 0.57 0.10 <l 8.0 0.658 3.20 1.31 1.82 0.40 0.13 <l 7.8 0.53 3.4 1 1.4 1 0.71 1.45 <0.6 <I 7.8 1.51 9.24 1.95 6.29 0.53 0.12 <l 8.0 0.53 2.10 1.26 1.80 0.81 0.19 <l 7.5 0.80 4.74 2.03 1.60 0.55 0.07 <l 7.9 1.05 5.09 2.43 3.0 3 0.58 0.06 1 7.9 0.44 1.33 0.68 1.25 0.80 0.25 <I 7.7 0.88 4.99 1.84 1.76 0.53 0.15 <I 8.1 0.493 1.96 0.95 1.95 0.56 0.11 1 8.1 0.708 2.71 1.50 2.33 0.45 0.13 <I 7.9 0.509 2.72 1.45 0.99 0.52 0.07 <I 8.3 0.603 2.22 1.55 1.56 0.39 0.09 <I 8.0 0.53 2.28 1.44 1.72 0.45 0.06 <I 8.4 0.563 1.67 1.27 2.28 0.36 0.07 <I 8.1 0.34 1.4 3 0.92 1.09 0.62 0.08 1 8.3 0.867 2.25 1.74 4.22 0.43 0.08 <l 8.1 0.542 1.95 1.34 2.1 9 0.79 0.08 <I 8.1 1.51 3.73 3.0 1 7.83 0.44 0.09 <I 8.1 0.953 2.39 1.72 5.53 0.52 0.09 <I 7.9 3.02 1 2.90 8.3 8 1 4.80 0.48 0.09 <I 7.9 1.51 5.89 3.7 1 7.1 9 0.97 0.1 2 1 7.8 2.82 19.70 10.40 6.74 0.65 0.12 <l 8.0 0.827 2.84 1.62 4.06 0.60 0.08 <I 7.9 0.636 2.77 1.15 1.93 0.68 0.1 3 <l 8.0 0.578 2.17 1.10 2.57 0.84 0.10 <l 7.9 1.27 4.48 1.79 6.2 5 0.54 0.09 <I 7.9 0.793 2.63 1.18 4.01 NOTE: 2000 Sample: I = 0 -6 inch es , 2 = 6 -1 8 in c he s and 3 = 18 -36 inche s 200 1 through 2008 S amp l e: I = 0 -I ft, 2 = 1 -2 ft and 3 = 2 -3 ft; BG sam p l es are b ackgro und. B-27 SAR (ratio) 2.88 0.26 1.85 1.13 0.45 0.57 0.68 0.79 1.30 2.28 0.53 0.60 0.92 0.70 0.71 0.71 1.21 0.45 2.66 1.39 0.86 1.56 1.25 1.95 1.62 1.61 0.68 1.14 1.26 1.88 1.01 2.99 1.7 1 4.27 3.86 4.54 3.2 8 1.74 2.72 1.38 2.01 3.53 2.91 Cl S04 (mg/kg) (mg/kg) 14 700 6 60 12 20 283 4380 19 80 32 118 220 1390 60 320 30 90 13 500 6 120 14 <10 405 5350 14 <50 26 99 240 1300 50 300 40 110 1 3 500 II 1 20 10 10 290 4340 16 70 30 120 270 1500 70 370 60 340 60 360 70 440 90 620 80 520 100 600 90 700 61 370 140 1180 60 420 40 400 15 540 30 230 70 480 50 320 70 560 40 400 I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I 1 , I I Sample Site N-1 N-2 N-3 Table B.2-3. Irrigation Soil Analyses, 2000-2013, for Section 28 Center Pivot U Se Mo pH Cond. Ca (units) mmho s/crr (meq/l) (mg/kg) (mg/kg) (mg/kg)

Date --* --* --* -. SECTION 28 CENTE R PIVOT 11/J 9/2002 2.99 <0.6 2 7.7 4.27 20.80 11/24/2003 0.8 1 0.18 <I 7.8 1.95 8.47 11/J 1/2004 0.89 0.37 <I 7.6 2.67 14.60 11/15/2005 0.68 0.17 <I 7.9 2.65 13.90 10/21/2006 I.I I 0.16 2 7.6 2.37 12.70 11/10/2007 1.14 0.47 <I 7.7 2.50 14.0 0 11/22/2008 1.17 0.39 I 7.9 2.90 16.90 1 0/9/2009 1.62 0.41 2 7.8 3.69 18.18 11/3/2010 1.37 0.27 2 7.8 4.29 23.00 10120/2011 0.73 0.22 <I 7.3 2.45 21.00 11/12/2012 1.15 0.39 I 7.7 1.33 5.90 12/17/2013 <I <I <I 7.6 4.10 29.20 11 119/2002 1.4 7 <0.6 <I 7.7 4.51 20.60 11/24/2003 0.70 0.16 <I 7.9 2.42 9.47 11/11/2004 0.80 0.23 <I 7.7 2.63 11.50 11/1 5/2005 0.74 0.15 <I 7.9 4.09 15.70 10/21/2006 1.14 0.09 2 7.7 2.56 12.50 11/10/2007 I.OJ 0.34 <I 7.6 3.11 17.60 11/2212008 I.OJ 0.24 I 7.8 3.27 18.40 10/9/2009 1.12 0.19 I 7.8 3.57 20.66 11/3/2010 1.24 0.20 2 7.5 4.13 22.00 10/20/2011 0.78 0.13 <I 7.6 2.18 18.50 11/1 2/2012 0.77 0.13 <I 7.7 1.88 11.70 1 2/1 7/2013 <I <I <I 7.8 3.58 27.10 11/1 9/2002 0.74 <0.6 <I 7.6 4.51 22.90 11/24/2003 0.57 0.13 <I 7.8 2.55 1 3.20 11/J 1/2004 0.70 0.23 <I 7.6 3.30 17.00 11/15/2005 0.58 0.12 <I 7.9 4.29 14.90 10/21/2006 1.06 0.08 2 7.8 3.58 15.20 11/10/2 007 0.92 0.25 <I 7.8 3.46 16.3 0 11/22/2008 I.O J 0.25 I 8.0 3.11 15.20 10/9/2009 1.24 0.20 I 8.0 4.1 3 1 8.94 11/3/2010 1.34 0.23 I 7.7 4.1 6 18.90 1 0/20/2011 0.75 0.08 I 7.7 2.50 18.90 11112/2012 1.07 0.15 <I 7.6 2.53 16.80 1 2117/2013 1.30 <I <I 7.9 4.92 25.20 B-28 Mg Na (meq/l) (m eq/l) -. 9.40 26.90 3.94 10.00 6.38 14.00 6.55 11.40 6.20 9.35 6.18 10.90 8.44 1 3.40 8.96 18.14 11.50 24.00 6.58 5.32 2.56 5.23 10.20 1 3.30 7.60 29.00 3.73 1 5.70 4.60 1 6.20 7.75 26.60 6.43 1 2.90 8.91 15.00 9.17 16.40 10.80 1 5.65 11.00 20.60 7.14 3.73 4.71 5.59 1 3.60 8.91 7.57 26.40 5.2 8 1 3.40 7.29 17.40 7.44 6.00 8.2 1 26.00 8.70 20.60 8.55 17.50 1 2.63 23.56 13.80 23.60 10.60 5.45 5.89 9.16 17.00 26.40 SAR (ratio) 6.92 4.01 4.32 3.57 3.04 3.43 3.73 4.87 5.78 1.43 2.54 3.0 0 7.72 6.11 5.71 7.77 4.16 4.12 4.42 3.97 5.07 1.04 1.95 2.00 6.76 4.41 4.99 1.80 7.60 5.83 5.08 5.72 5.84 1.42 2.72 5.70 Cl S04 (mg/kg) (mg/kg) ----* 48 3700 24 400 28 70 42 430 57 280 34 490 48 760 117 895 24 230 17 500 90 680 54 1020 68 3400 49 450 61 70 87 33 0 1 8 6 10 37 500 35 870 65 1011 1 21 890 II 770 29 580 15 890 39 1300 74 380 1 34 70 118 420 37 670 37 540 60 910 65 1 054 60 720 1 3 690 38 930 21 1570 Table B.2-3. Irrigation Soil Analyses , 2000-2013 , for Section 28 Center P i vot (cont.) Samp l e Site N-4 N-5 N-5-7 N-7-9 N-9-1 1 N-1 1-13 N-1 3-15 N-15-17 Date 10/9/2009 11/3/2010 10/20/201 1 11/12/2012 12117/2013 10/10/2009 11/3/2010 10/20/2011 11/12/2012 12117/2013 10/11/2009 11/3/2010 10 1 20 1 2011 11/12/2012 12/17/2013 10/12/2009 11/3/2010 10/20/2011 11/12/2012 12/17/2013 10/13/2009 11/3/2010 10 1 20 1 20 11 1 1/12/2012 12/17/2013 10/14/2009 11 1 3 1 20 1 0 10/20/2011 11/12/2012 12/17/20 1 3 10115 1 2009 11/3/2010 10/20/20 1 1 11/12/2012 12/17/20 1 3 10116 1 2009 11/3/2010 12117/2013 U Se Mo (mg/kg) (mg/kg) (mg/kg) 0.78 0.10 I 1.03 0.15 I 0.76 0.15 <I 0.72 0.10 <l <I <l <1 0.83 0.12 3 0.84 0.14 I 0.62 <0.05 <l 0.63 0.06 <I <I <I <I 0.71 0.08 2 0.71 0.13 I 0.48 <0.05 I 0.71 0.06 <I 1.30 <I <I 0.76 0.10 2 0.61 0.09 2 0.38 <0.05 <l 0.97 0.09 <l <I <I <I 0.47 0.08 2 0.67 0.16 1 0.39 <0.05 <I 0.52 0.07 <I <I <I <I 0.53 0.12 I 0.64 0.15 2 0.35 <0.05 <I 0.57 <0.05 <I <I <I <I 1.02 0.28 2 0.80 0.24 2 0.40 0.08 <I 0.51 0.07 <l <l <l <1 0.41 0.20 2 0.53 0.12 I <l <I <I pH Cond. Ca Mg Na (units) mmhos/crr. (meq/I) (meq/I) (meq/I) 8.1 3.47 12.67 9.14 22.18 7.9 2.98 11.70 6.84 17.50 7.8 2.75 15.00 10.70 10.70 7.8 1.88 9.28 3.97 7.50 7.9 4.10 21.20 13.10 20.10 8.2 3.77 1 1.46 8.43 27.17 7.9 3.26 IO.IO 5.1 1 22.80 8.0 2.49 8.29 6.90 14.50 8.0 1.33 4.37 2.64 6.65 8.2 1.52 3.28 2.60 9.69 8.2 3.41 9.95 6.13 22.89 7.9 3.27 10.30 5.73 21.00 8.0 2.69 7.56 5.29 17.60 8.0 1.83 5.81 3.99 9.22 8.0 5.83 20.00 14.70 43.00 8.0 3.90 14.73 10.58 23.32 7.9 2.52 6.57 4.19 16.90 8.0 2.66 10.70 7.25 1 4.40 7.8 3.23 14.20 7.90 17.20 7.9 4.42 1 3.50 9.00 31.00 8.0 3.46 1 4.26 7.59 1 8.29 7.8 3.26 14.50 9.27 17.00 7.9 2.58 1 2.10 9.1 2 10.80 7.7 2.75 11.50 6.24 1 3.90 7.8 6.11 23.70 1 6.60 41.40 7.9 2.68 10.01 4.34 15.14 7.7 3.35 16.60 7.81 15.00 7.9 1.86 7.72 3.80 9.00 7.5 2.48 12.40 5.94 10.40 7.7 5.60 26.20 9.10 35.60 7.8 3.40 14.0 1 6.45 19.97 7.7 2.74 1 3.20 4.90 13.60 7.7 2.29 11.50 4.65 10.30 7.5 2.72 13.20 5.21 13.00 7.5 4.99 25.10 7.90 31.70 7.8 3.04 14.16 6.43 1 6.08 7.8 2.08 9.00 3.35 4.5 1 7.8 2.4 1 8.96 2.90 16.0 0 NOTE: 2000 Sample: I= 0 -6 inches , 2 = 6 -18 inches and 3 = 18 -36 inches 2001 through 2008 Sample: I = 0 -I ft, 2 = I -2 ft and 3 = 2 -3 ft; BG sam ples are background. B-29 SAR (ratio) 6.39 5.75 2.98 2.91 4.90 9.22 8.27 5.26 3.55 5.60 9.69 7.42 6.94 4.17 10.30 6.54 7.29 4.81 5.17 9.20 6.13 4.93 3.32 4.67 9.20 5.88 4.29 3.75 3.43 8.50 6.17 4.52 3.62 4.28 7.80 4.75 4.51 6.60 Cl S04 (mg/kg) (mg/kg) 50 683 44 560 19 620 35 460 23 778 100 783 60 7 10 40 560 90 610 10 188 159 604 180 750 67 690 70 570 30 1090 140 871 130 1000 58 680 70 980 54 550 166 602 69 520 71 580 49 640 64 1 550 145 747 151 370 83 630 28 2700 95 777 136 948 90 440 84 520 93 680 62 847 92 620 70 500 54 311 I I I I I I I I I I I I I I I I I I Table B.2-4. Irrigation Soil Meteoric Water Mobility Test Results, 2015, for Section 28 Samp l e Site 1 2 3 4 5 6 7 8 9 10 1 1 12 13 14 15 17 Date 8/24/2015 8/24/2015 8/24/2015 8/24/2015 8/24/2015 8/24/2015 8/24/2015 8/24/2015 8/24/2015 8/24/2015 8/24/2015 8/24/2015 8/24/2015 8/24/2015 8/24/2015 8/24/2015 u (mg/I) 0.0225 0.0214 0.0241 0.0214 0.0130 0.0135 0.0141 0.0167 0.0086 0.0063 0.0054 0.0111 0.0078 0.0017 0.0020 0.0032 Se (mg/I) Mo (mg/I) Nitrate/ pH Nitrite (units) (m g/I) SECTI O N 28 CENTE R PIV O T 0.0094 0.03 8.11 3.58 0.0053 0.04 8.4 I 1.3 8 0.0205 <0.02 8.26 1.93 0.0090 <0.02 8.49 0.59 0.0051 <0.02 8.18 0.50 0.0032 <0.02 8.41 0.53 0.0067 <0.02 8.19 0.3 1 0.0124 <0.02 8.15 0.81 0.0100 <0.02 8.27 0.74 0.0050 <0.02 8.39 0.6 3 0.0050 <0.02 8.30 1.19 0.0058 0.02 7.96 0.83 0.0049 <0.02 8.29 0.56 0.0100 0.02 8.35 0.95 0.0130 0.03 8.21 1.55 0.0099 0.02 8.18 1.71 B-30 TDS (mg/I) 232 526 940 570 626 386 552 636 478 344 558 756 608 630 760 66 8 C l S04 (mg/kg) (mg/kg) 2.6 60 13.7 290 30.8 550 18.0 340 19.6 380 16.9 230 44.5 280 67.6 320 74.2 180 69.7 120 133.0 180 96.5 350 71.0 580 75.l 290 72.7 390 28.6 380 APPENDIXC SOIL MOISTURE CONCENTRATIONS FROM IRRIGATION L YSIMETERS

• 1 I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I C.O C-1 C-2 APPENDIXC TABLE OF CONTENTS SOIL MOISTURE CONCENTRATIONS FROM IRRIGATION LYSIMETERS Page Number IRRIGATION LYSIMETERS

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.... C-1 FIGURES LOCATIONS OF THE SOIL MOISTURE L YSIMETERS IN THE IRRIGATION AREAS ...............

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.......................... C-2 TDS, SULFATE AND CHLORIDE CONCENTRATIONS FROM LYl ..............

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... C-3 C-3 URANIUM , SELENIUM AND MOLYBDENUM CONCENTRATIONS FROM L Yl .... C-4 C-4 TDS , SULFA TE AND CHLORIDE CONCENTRATIONS FROM L Y2 ...........................

C-5 C-5 URANIUM, SELENJUM AND MOLYBDENUM CONCENTRATIONS FROM L Y2 .... C-6 C-6 TDS, SULFATE AND CHLORIDE CONCENTRATIONS FROM LY 4 ........................... C-7 C-7 URANIUM, SELENIUM AND MOLYBDENUM CONCENTRA TJONS FROM LY 4 .... C-8 C-8 TDS , SULFATE AND CHLORJDE CONCENTRATIONS FROM LY 4MU .....................

C-9 C-9 URANIUM, SELENIUM AND MOLYBDENUM CONCENTRATIONS FROM LY4MU ................................................................................................

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............................. C-IO C-10 TDS , SULFATE AND CHLORIDE CONCENTRATIONS FROM L Y34-1 ....................

C-11 C-11 URANIUM, SELENIUM AND MOLYBDENUM CONCENTRATIONS FROM LY34-1 .................

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...... C-12 C-12 TDS, SULFA TE AND CHLORIDE CONCENTRATIONS FROM L Y34-2 ....................

C-13 C-13 URANIUM, SELENIUM AND MOLYBDENUM CONCENTRATIONS FROM L Y34-2C-l 4 C-14 TDS , SULFATE AND CHLORIDE CONCENTRATIONS FROM L Y34-3 .................... C-15 C-15 URANIUM, SELENIUM AND MOLYBDENUM CONCENTRATIONS FROM L Y34-3 ..... ..................

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C-16 C-16 TDS, SULFA TE AND CHLORIDE CONCENTRATIONS FROM L Y28-1 ....................

C-17 C-17 URANIUM, SELENIUM AND MOLYBDENUM CONCENTRATIONS FROM L Y28-1 ..... .......................................................................................................................................

...... C-18 Grants Reclamation Project C-i Land App lication Imp act Assessment C-18 C-19 C-20 C-21 C-22 C-23 C-1 C-2 A PP EN DI XC T A BL E O F C O N T ENTS S OIL M O IS T U RE C O N C ENTRA TIO NS F RO M I RRJG A TIO N L YSIME T E R S FIGURES (c o n t inu e d) P a ge N umb e r TDS , SULFA T E AND CHLORJDE CONCENTRATIONS FROM L Y28-2 ....................

C-19 URANIUM, SELENIUM AND MOLYBDENUM CONCENTRATIONS FROM L Y28-2 ..... ................................

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................................. C-20 TDS , SULFATE AND CHLORJDE CONCENTRAT I ONS FROM L Y28-2M ................. C-21 URANIUM , SEL E NIUM AND MOLYBDENUM CONCENTRATIONS FROM L Y28-2M ................................

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............. C-22 TDS , SULFA TE AND CHLORJDE CONCENTRATIONS FROM L Y28-3 .................... C-2 3 URANIUM , SELENIUM AND MOLYBDENUM CONCENTRAT I ONS FROM L Y28-3 ...........

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.......... C-24 TABLES WATER QUALITY ANALYSIS FOR L YSIMETERS , MAJOR CONSTITUENTS

....... C-25 WATER QUALITY ANALYSIS FOR L YS I METERS , MINOR CONSTITUENTS

....... C-42 Grants R ecla mation Pro jec t C-ii Land Applica t io n Imp act Assessme nt I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I C.O Irrigation Lysimeters E ight lysimeters were initially installed in Section 33 center pivot area in 2009. Three of these lysimeters were installed in the basalt and five were installed in the alluvial material above the basalt (see HMC 2013a or other irrigation report for details in the lysimeter installations).

Figure C-1 shows the locations of the eight Section 33 lysimeters.

Three lysimeters were installed in Section 34 flood area while one was installed in the Section 33 flood area which was labeled L Y34-4. Five lysimeters were installed in the Section 28 pivot area with two of these lysimeter s installed into the basalt. Monthly or quarterly sampling frequency was conducted after installation through 2015. Some of the lysimeters produced water most sampling periods while others produced very little water. Table C-1 presents the water quality results of the soil moisture samples for the major constituents , presenting the data in the order of Sections 33 , 28 and 34. The minor constituents which includes the uranium and selenium data is presented in Table C-2. Figures C-2 through C-23 present plots of soil moisture concentrations with time for the lysimeters that produced several samples. This data defines concentrations in the alluvial soil moisture but are not a measurement of soil moisture concentration entering the ground water. The ground water monitoring data is the most direct data that is collected to define the impacts of the irrigation on the ground-water quality. In general , the uranium concentrations in the soil moisture have declined since the ceasing of the irrigation.

Gra n ts R ec l a m a t io n Pro j ec t C-1 L a nd Applicati o n Im pact A s s ess m e nt

(') I "' ---100 ACRE CENTER PIVOT 150 AC CENTER PIVOT ,,,,----( X LY4 LY4MU LY4ML '--......_

\

LY28-1M x LY28-2M LY28-2 LY28-3 x ,, \\x [r-24 AC CENTER PIVOT LY3M J x LYl X LYS 32 33 3 FLOOD IRRIGATION 120 AC FLOOD 4 3 HOMESTAKE MILL AND ADJACENT PROPERTIES

-GRANTS, NM -TD'w'NSHIP

-118.12N, RANGE-lO'w' FIGURE C-1 LOCATIONS OF THE SOIL MOISTURE LYSIMETERS IN THE IRRIGATION AREAS -----------LARGE-TAIUNGS-PILE DATE:9/6/17 SCALE: 1 "=1600' PAGE: -----

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4750 1000 4500 Legend 4250

• TDS 4000

• Sulfate

• Chloride 3750 800 3500 -g 3250 -g z 3000 0 Vl ....... z 2750 0 I-600 z UJ 2500 I-u z z UJ 0 2250 u u z UJ 0 0 2000 u UJ w _J 0 ::::> Vl 1750 0 _J 400 I Vl 1500 u 0 I-1250 1000 750 500 200 250 0 2010 2011 2012 2013 2014 2015 2016 FIG UR E C-2. TDS , SULFATE A ND CHLORIDE CONCENTRATIONS FROM LY1.

. Cl E z 0 -f-z UJ u z 0 u :::!: => z UJ 0 cc 0 () :::!: I olS :::!: => -z UJ _J UJ l/l :::!: => -z => 0.2 Legend

• Uranium

• Selenium

• Molybdenum 0.16 2009 Irrigation Water u -0.24 Se -0.05 Mo -<0.03 0.12 0.08 0.04 2010 2011 2012 2013 2014 2015 2016 FIGURE C-3. URANIUM, SELENIUM AND MOLYBDENUM CONCENTRATIONS FROM LY1. -------------------

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2010 2011 2012 2013 2014 2015 FIGURE C-4. TDS, SULFATE AND CHLORIDE CONCENTRATIONS FROM LY2.

.. Cl E V'l' z 0 f-z UJ u z 0 u ::E :::> z UJ 0 co 0 () ::E I clS O> ::E :::> -z UJ _J UJ V'l ::E :::> -z :::> 0.3 Legend

• Uranium

• Selenium .. Molybdenum 2009 Irrigation Water u -0.24 Se -0.05 Mo -<0.03 0.2 0.1 2010 2011 2012 2013 2014 2015 FIGURE C-5. URANIUM, SELENIUM AND MOLYBDENUM CONCENTRATIONS FROM LY2. -------------------

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4 750 4500 4250 4000 ::::::. 3750 O'l E -Vl' 3500 z 0 600 O'l E lfl' 3250 f-z z 0 -UJ u 3000 z f-Legend z UJ 0 u

• TDS u z () UJ I f-2750 -...J Lt _J :::::>

• Sulfate 0 u

• Chloride UJ 0 lfl 2500 ol:S lfl 0 f-2250 2009 Irrigation Water 0 _J 400 I TDS -1670 u 504-708 Cl -161 2000 1750 1500 1250 2009 2010 2011 2012 2013 2014 2015 2016 FIGURE C-6. TDS, SULFATE AND CHLORIDE CONCENTRATIONS FROM LY4.

---01 E z 0 z UJ u z 0 u :::E :::> z UJ 0 co 0 () :::E I <XS CX> :::E :::> -z UJ _J UJ lll :::E :::> -z :::> 0.25 Legend

• Uranium

• Selenium

• M o lybdenum 0.2 0.15 2009 Irrigation Water u -0.24 Se -0.05 0.1 Mo -<0.03 0.05 2009 2010 2011 2012 2013 2014 2015 2016 FIGURE C-7. URANIUM , SELENIUM AND MOLYBDENUM CONCENTRATIONS FROM LY4. -------------------

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16000 1000 2009 Irrigation Water TDS -1 670 Legend 504 -708

• TDS Cl -161

• Sulfate

• Chloride 900 12000 ::::::. -(/')' z 0 (/') -800 -I-z UJ I-u 8000 z z UJ 0 u u z UJ 0 () u I UJ CD _J 700 0 :::> (/') 0 cx:s _J I (/') u 0 I-4000 600 2010 2011 2012 2013 2014 2015 2016 FIGURE C-8. TDS, SULFATE AND CHLORIDE CONCENTRATIONS FROM LY4MU.

..

Ol E Ul z 0 -I-z LU u z 0 u ::E ::::> z LU 0 cc 0 () ::E I cX:S _.. 0 ::E ::::> -z LU ...J LU Ul ::E ::::> -z ::::> 0.8 Legend

• Uranium

• Se l en i um

• Molybd e num 2009 Irrigation Water 0.6 u -0.24 Se -0.05 Mo -<0.03 0.4 0.2 2010 2 011 2012 2013 2014 2015 2016 FIGURE C-9. URANIUM , SELENIUM AND MOLYBDENUM CONCENTRATIONS FROM LY4MU. -------------------

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8000 800 6000 600 -::::::::.

(/)' z (/)' 0 ...... z 0 ...... I-z UJ I-u 4000 400 d:i z 0 u u z UJ 0 () u ' UJ __. 0 __. _J :::> 02 (/) 0 _J :c (/) u 0 I-2000 Legend 200

• TDS

• Sulfate

• Chloride 2012 Irrigation Water TDS -1690 504 -689 Cl -161 0 0 2010 2011 2012 2013 2014 2015 2016 F IGURE C-10. TDS , SULFATE AND CHLORIDE CONCENTRATIONS FROM LY34-1.

0.5 -01 E 0.4 Vl' z 0 ...... f-z UJ u z 0 0.3 u ::E ::J z UJ Cl co 0 () ::E I _.. 0.2 N ::E ::J ...... z UJ ....J UJ Vl ::E' ::J ...... z 0.1 ::J Legend

• Uranium

• Selenium

• Molybdenum 2012 Irrigation Water u -0.116 Se -0.041 Mo-<0.03 2010 2011 2012 2013 2014 2015 FIGURE C-11. URANIUM , SE LE NIUM AND MOLYBD E NU M CONCENTRATIONS FROM LY34-1. 2016 -------------------

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6250 1000 6000 Legend 5750

• TDS 5500

• Sulfate 5250

• Chlo r ide 5000 800 4750 -4500 g 4250 ::::::. (/)' 4000 g z 0 (/) ...... 3750 600 z 0 350 0 I-z UJ 3250 I-u z z UJ 0 3000 u u z 0 UJ 27 5 0 () u I UJ ...... LL 2500 400 0 (..) _J ::J (/) 2250 0 c?:S _J I (/) 2000 u 0 I-1750 1500 1250 200 1000 750 2012 Irrigation Wate 500 TDS -1690 250 504-689 Cl -161 0 0 2010 2011 2012 2013 2014 2015 2016 FIGURE C-1 2. TDS, SULFATE AND CHLORIDE CONCENTRA T IONS FROM LY 3 4-2.

0.5 -O'l E 0.4 U)' z 0 -I-z UJ u z 0 0.3 u ::E :::> z UJ a co 0 () ::E ' _.. 0.2 .j>.. ::E :::> -z UJ _J UJ U) ::E :::> -z 0.1 :::> Legend

• Uranium

• Selenium

• Molybdenum 2012 Irrigation u -0.116 Se -0.041 Mo-<0.03 2010 2011 2012 2013 2014 2015 FIGURE C-13. URANIUM, SELENIUM AND MOLYBDENUM CONCENTRATIONS FROM LY34-2. 2016 -------------------

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7250 1200 7000 6750 Legend

• TDS 6500 6250

• Sulfate 6000

• Chloride 5750 5500 5250 -g 5000 ::::::.

4750 800 g z 0 4500 (/) z 4250 0 -I-4000 z LU 3750 I-u z z 3500 LU 0 u u z LU 3250 0 c;> I-u 3000 LU ...... Cl 01 _J :::> 2750 Ci'. (/) 0 cX:S 2500 _J I (/) 2250 Cl 400 u I-2000 1750 1500 1250 1000 750 500 250 0 2010 2011 2012 2013 2014 2015 FIGURE C-14. TDS, SULFATE AND CHLORIDE CONCENTRATIONS FROM LY34-3.

0.6 :::::::..

Ol E z 0 I-0.4 z LU u z 0 u :E :::> z LU 0 co '.'.:i 0 () :E I oe:s ...... O> :E :::> ...... z 0.2 LU ....I LU lll :E :::> ...... z :::> 2012 Irrigation Water Legend u -0.116

• Uranium Se -0.041

• Selenium Mo -<0.03

• Molybdenum 2010 2011 2012 2013 2014 FIGURE C-15. URANIUM, SELENIUM AND MOLYBDENUM CONCENTRATIONS FROM LY34-3. 2015 -------------------

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3500 400 3250 3000 2750 300 :::::. 2500 g -V>' 2250 g z 0 <fl -z 0 2000 I-z UJ I-u 1750 200 z z UJ 0 u u z 0 UJ 0 ...... 1500 u '-I UJ LL Cl _J :::> <fl 1250 0 ex:! _J ::r:: <fl Legend u Cl I-1000

• TDS

• Sulfate 100 750

• Chloride 500 2012 Irrigation Water TDS -1846 250 504 -756 Cl -189 0 0 2010 2011 2012 2013 2014 2015 2016 FIGURE C-16. TDS, SULFATE AND CHLORIDE CONCENTRATIONS FROM LY28-1.

0.25 ::::::::.

O'l E 0.2 Ul' z 0 I-z UJ u z 0 0.15 u :E :::> z UJ 0 cc 0 () :E I __.. 0.1 CX> :E :::> ...... z UJ _J UJ Ul :E :::> ...... z 0.05 :::> Legend

• Uranium

• Selenium

• M ol y b denum 2012 Irrig a ti o n Water u -0.14 Se -0.036 Mo -<0.03 2010 2011 20 1 2 2013 2014 2015 2016 FIGURE C-17. URANIUM, SELENIUM AND MOLYBDENUM CONCENTRATIONS FROM LY28-1. -------------------

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() I ..... co 6750 6500 6250 6000 5750 5500 5250 5000 -4750 Ol E (/)' 4500 z 4250 0 4000 I-3750 z lJ.J 3500 u z 3250 0 u lJ.J 3000 2750 ......J :::> 2500 Vl 2250 Vl 0 2000 I-1750 1500 1250 1000 750 500 250 0 2010 2011 2012 2013 2014 Legend

• TDS

• Sulfate

• Chloride 2012 Irrigation Water TDS -1846 504 -756 Cl -189 2015 800 600 -Vl z 0 -I-400 z lJ.J u z 0 u lJ.J 0 0 ......J ::c u 200 2016 FIGURE C-18. TDS, SULFATE AND CHLORIDE CONCENTRATIONS FROM L Y28-2.

1 -O'l E 0.8 (/')' z 0 ....... I-z UJ u z 0 0.6 u ::E :::> z UJ a co 0 0 ::E I N 0.4 0 ::E :::> ....... z UJ ...J UJ (/') ::E :::> ....... z 0.2 :::> Legend

• Uranium

• Selenium

• Molybdenum 2012 Irrigation Water u -0.14 Se -0.036 Mo -<0.03 2010 2011 2012 2013 2014 2015 FIGURE C-19. URANIUM, SELENIUM AND MOLYBDENUM CONCENTRATIONS FROM LY28-2. 2016 -------------------

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7750 7500 7250 7000 6750 6500 6250 6000 5750 ::::::.. 5500 5250 5000 z -0 4750 4500 r-4250 z (/) 600 z 0 ...... UJ 4000 u r-z z 3750 0 Legend u 3500 UJ

• TDS () ' 3250 N

• Sulfate __. ...J 3000 :::> (/) 2750 .. Chloride olS (/) 2500 2012 Irrigation Water Cl r-2250 TDS -1846 UJ u z 0 u UJ 400 Cl 0 ...J :r:: u 2000 504-756 1750 Cl -189 1500 1250 1000 750 500 250 0 2010 2011 2012 2013 2014 2015 FIGURE C-20. TDS, SULFATE AND CHLORIDE CONCENTRATIONS FROM LY28-2M.

0.5 :::::::..

01 E 0.4 vi' z 0 ...... f--z UJ u z 0 0.3 u :::E :::> z UJ Cl co >--' 0 () :::E r\J ol$ 0.2 N :::E :::> ...... z UJ -' UJ Vl :::E :::> ...... z 0.1 :::> Legend

• Uranium

• Selenium

• Molybdenum 2012 Irrigation Water u -0.14 Se -0.036 Mo-<0.03 2010 2011 2012 2013 2014 FIGURE C-21. URANIUM, SELENIUM AND MOLYBDENUM CONCENTRATIONS FROM LY28-2M. 2015 -------------------

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10000 1200 Legend e TDS

• Sulfate ----*---Chloride 1000 8000 -::::::. V>' 800 z 0 (/) 6000 z 0 ...... I-z UJ I-u 600 z z UJ 0 u u z UJ 0 () u N UJ (.,.) _J 4000 Cl ::::> (/) 0 _J 400 I (/) u Cl I-2000 200 2012 Irrigation Water TDS -1846 504 -756 Cl -189 0 0 2010 2011 2012 2013 2014 2015 2016 FIGURE C-22. TDS, SULFATE AND CHLORIDE CONCENTRATIONS FROM LY28-3.

. Ol E l/)' z 0 ....... I-z UJ u z 0 u ::E ::> z UJ 0 co 0 () ::E N ::E ::> ....... z UJ _J UJ l/) ::E ::> ....... z ::> 2 Legend

• Urani u m

• S eleni u m

• Mo lyb de num 1.6 2012 Irrigation Water u -0.14 Se -0.036 Mo -<0.03 1.2 0.8 0.4 2 01 0 2011 2 01 2 2013 2014 2015 2016 FIGURE C-23. URANIUM, SELENIUM AND MOLYBDENUM CONCENTRATIONS FROM L Y28-3. -------------------

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Table C-1 WATER QUALITY ANALYSIS FOR LYSIMETERS (cont.) Major Constituents Sample Point Ca Mg K Na HC03 C03 Cl 504 TDS Cond(calc.)

lon_B Name Date Lab (mg/I) (mg/I) (mg/I) (mg/I) (mg/I) (mg/I) (mg/I) (mg/I) (mg/I) (micromhos/ (ratio) LY1 7/22/2009 ENER 121 337 1240 8/13/2009 ENER 152 543 1530 9/23/2009 ENER 201 118 2.90 61.3 529 < 1.000 168 489 1500

• 2010 0.951 10/16/2009 ENER 179 508 1550

• 2082 11 /13/2009 EN ER 189 154 2.80 61.5 488 < 5.00 218 590 1560

• 2270 0.934 12/18/2009 ENER 230 141 2.60 60.1 467 < 5.00 235 647 1640

• 2338 0.922 12/30/2009 ENER 286 127 2.40 61.2 430 < 5.00 248 719 1770

• 2075 0.940 1/31/2010 ENER 266 770 1940 2/22/2010 ENER 275 814 1850

• 2560 3/25/2010 ENER 289 840 2100

• 2650 4/29/2010 ENER 313 927 2160

• 2750 5/31/2010 ENER 321 1020 2360

• 2870 6/30/2010 ENER 350 1200 2670

• 3136 7/27/2010 ENER 372 1370 2870

• 3310 12/16/2011 ENER 661 1940 4100

• 4640 1/31/2012 ENER 678 1930 4290

• 5036 2/29/2012 ENER 663 1900 4180

• 5012 4/30/2012 ENER 690 1910 4460

• 5033 5/31/2012 ENER 659 1890 4420

• 4993 6/30/2012 ENER 641 1890 4340

• 4941 7/27/2012 ENER 643 1900 4420

• 4910 8/31/2012 ENER 648 1850 4240

• 4944 9/28/2012 ENER 707 1860 4510

• 5017 10/31/2012 ENER 776 1880 4250

• 5082 11 /28/2012 ENER 825 1930 4220

• 5174 1/31/2013 ENER 855 1840 4170

• 5245 2/22/2013 ENER 892 1840 4320

• 5239 3/26/2013 HMC 882 1800 4320 5292 4/30/2013 ENER 907 1810 4390

• 5297

• Signifies Specific Conductivity from HMC c -25 Table C-1 WATER QUALITY ANALYSIS FOR LYSIMETERS

{cont.) Major Constituents Sample Point Ca Mg K Na HC03 C03 Cl 504 TDS Cond(calc.) lon_B Name Date Lab (mg/I) (mg/I) (mg/I) (mg/I) (mg/I) (mg/I) (mg/I) (mg/I) (mg/I) (micromhos/ (ratio) LY1 12/12/2013 ENER 287 1730 3340

• 3810 3/28/2014 ENER 266 1680 3230 6/27/2014 ENER 245 1660 3220 9/30/2014 ENER 234 1740 3170 12/2312014 ENER 233 1720 3350 3/3112015 ENER 256 1860 3500

• 3870 613012015 ENER 246 1870 3500

• 2932 913012015 ENER 248 1840 3410

• 3819 LY2 612412009 ENER 225 654 1720

• 2308 1211612011 ENER 593 1980 4420

• 5068 113112012 ENER 460 2130 4430

• 5013 313112012 ENER 421 2140 4480

• 4920 413012012 ENER 399 2160 4500

• 4988 513112012 ENER 374 2240 4420

• 4871 613012012 ENER 340 2140 4540 *4 844 712712012 ENER 596 2000 4470

• 5090 813112012 ENER 803 1640 4380

• 5351 912812012 ENER 597 1820 4310

• 4984 1112812012 ENER 482 2080 4310 ; 4831 1213012012 ENER 472 2000 4250

• 4892 113112013 ENER 471 1970 4120

• 4777 312812014 ENER 275 1530 3100 LY4 12/412008 ENER 269 1430 3180 12/5/2008 ENER 310 1700 3730 121812008 ENER 317 1720 3700 1211112008 ENER 336 1850 4100 1211212008 ENER 337 1860 4070 11712009 ENER 330 1870 4120

• Signifies Specific Conductivity from HMC c-26 -------------------

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Table C-1 WATER QUALITY ANALYSIS FOR LYSIMETERS (cont.) Major Constituents Sample Point Ca Mg K Na HC03 C03 Cl $04 TDS Cond(calc.)

lon_B Name Date Lab (mg/I) (mg/I) (mg/I) (mg/I) (mg/I) (mg/I) (mg/I) (mg/I) (mg/I) (micromhos/ (ratio) LY4 2/18/2009 ENER 702 138 5.20 412 783 < 1.000 353 2050 4150 0.984 3/20/2009 ENER 326 1940 4220 4/18/2009 ENER 336 1990 3970

• 4522 5/15/2009 ENER 328 1950 3990 6/10/2009 ENER 336 1880 3870

• 4370 6/24/2009 ENER 324 1920 4180

• 4503 7/22/2009 ENER 315 1990 4220 8/13/2009 ENER 354 2170 4380 912312009 ENER 728 142 3.50 392 842 < 1.000 339 2250 4530

• 4870 0.928 10/16/2009 ENER 340 2270 4240

• 5040 11 /13/2009 ENER 652 147 3.80 430 634 < 5.00 338 2220 4170

• 5100 0.957 12/18/2009 ENER 757 149 4.00 425 712 < 5.00 343 2260 4170

• 5096 1.00 12/30/2009 ENER 699 153 4.00 468 837 < 5.00 342 2260 4250

• 3091 0.962 1/31/2010 ENER 343 2210 4470 2/22/2010 ENER 331 2160 4140

• 5020 3/25/2010 ENER 339 2170 4520

• 5020 4/29/2010 ENER 357 2280 4400

• 5040 5/31/2010 ENER 349 2300 4410

• 5100 6/30/2010 ENER 357 2320 4570

• 5100 712712010 ENER 357 2270 4500

• 4900 8/31/2010 ENER 363 2190 4160

• 4900 9/30/2010 ENER 366 2170 3970 10/31/2010 ENER 381 2180 4110

• 4670 1 1/30/2010 ENER 383 2100 4150

• 4660 1/31/2011 ENER 411 1880 3220

• 4510 2/25/2011 ENER 424 2000 3820

• 4490 3/31/2011 ENER 464 2040 3350 5/26/2011 HMC 4490 8/31/2011 ENER 507 1890 3770

• 4515 *Signifies Specific Conductivity from HMC c -27 Table C-1 WATER QUALITY ANALYSIS FOR LYSIMETERS (cont.) Major Constituents Sample Point Ca Mg K Na HC03 C03 Cl 504 TDS Cond(calc.) lon_B Name Date Lab (mg/I) (mg/I) (mg/I) (mg/I) (mg/I) (mg/I) (mg/I) (mg/I) (mg/I) (micromhos/ (ratio) LY4 9/30/2011 ENER 508 1900 3740 10/31/2011 ENER 508 1920 3640 11/30/2011 ENER 499 1770 3800 1/31/2012 ENER 515 1810 3730 4/30/2012 ENER 540 1850 4090 5/31/2012 ENER 509 1770 4060 6/30/2012 ENER 517 1760 3260 7/27/2012 ENER 566 1810 3830 9/28/2012 ENER 541 1770 3790 11 /28/2012 ENER 591 1950 3760 12/30/2012 HMC 4513 3/26/2013 HMC 579 1790 3480 3/28/2014 ENER 597 1800 3670 6/27/2014 ENER 596 1700 3730 6/30/2015 ENER 625 1850 3790 LY4ML 4/18/2009 ENER 142 409 612412009 ENER 684 5510 12000 712212009 ENER 650 5460 11600 8/13/2009 ENER 663 5050 10400 9/23/2009 ENER 180 29.6 6.00 2180 1140 < 1.000 629 3460 7340

• 9310 0.981 10/16/2009 ENER 568 2570 5840

• 7904 11/13/2009 ENER 166 98.2 11.0 2820 1570 72.0 591 3930 7830

• 7250 1.10 12/18/2009 ENER 113 25.5 5.00 1520 11 90 < 5.00 562 1760 4520

• 6490 1 03 4/29/2010 ENER 571 1070 3700

• 5330 5/31/2010 ENER 567 917 3080 6/30/2010 ENER 581 907 3130 7/27/2010 ENER 574 866 3190 *4860 8/31/2010 ENER 588 851 3080

• 4820 9/30/2010 ENER 580 805 2980

• Signifies Specific Conductivity from HMC c ------------------

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T able C-1 WATER Q UALITY ANAL YSI S FO R LY S I ME T ER S (co n t.) Major C o n s tituents S a m pl e Point C a Mg K N a HC 0 3 C 0 3 Cl 504 T DS Cond(calc.) lon_B Na m e Date Lab (mg/I) (m g/I) (mg/I) (mg/I) (mg/I) (mg/I) (mg/I) (mg/I) (mg/I) (micromhos/ (ratio) LY4ML 10/31/2010 ENER 575 777 2970

• 4660 11/30/2010 E NER 566 751 3180

• 4670 4/29/2011 ENER 597 763 2520 10/31/2011 ENER 727 1150 4240 LY4MU 7/22/2009 ENER 660 3240 8210 8/13/2009 ENER 903 6990 139 0 0 9/23/2 0 09 ENER 263 90.0 14.0 3510 1580 < 1.000 712 6130 11700

• 13860 1.000 10/16/2009 ENER 592 4850 9780 11 /13/2009 EN ER 100.0 31.7 5.00 1790 1030 < 5.00 584 2210 5160

• 10600 1.08 1/31/2010 ENER 600 2010 5730 2/22/2 0 10 ENER 631 126 0 4630

• 6740 3/2 5/2010 E NER 634 920 45 0 0

• 6390 4/29/2010 ENER 674 742 4210

• 6200 5/31/2010 ENER 697 694 4090

• 6160 6/30/2010 ENER 711 675 4220

• 6150 7/2 7/2010 ENER 717 657 419 0

• 6050 8/31/2010 E NE R 722 662 4140

• 6140 9/30/2010 ENER 717 679 4210 10/31/2010 ENER 724 718 4080

• 6170 11/30/2010 ENER 724 760 4350

• 6280 1/31/2011 ENER 730 885 4160

• 6300 2/25/2011 E N E R 721 898 423 0

• 6340 4/29/2011 E NER 735 955 4310 5/26/2011 HMC 6410 6/30/2011 ENER 740 1050 4240

• 6460 7/1 5/2011 ENER 701 10 30 438 0

• 6460 8/31/2011 E NER 754 1090 4410

• 6582 9/30/2011 ENER 749 1140 4330

• 65 0 0 10/31/2011 HMC 6600

• Signifies Specific Conductivity fr o m HMC c -29 Table C-1 WATER QUALITY ANALYSIS FOR LYSIMETERS (cont.) Major Constituents Sampl e P o i n t Ca Mg K N a HCOJ C O J Cl 504 TDS Cond (cal c.) l on_B Nam e Da t e La b (mg/I) (mg/I) (mg/I) (mg/I) (mg/I) (mg/I) (mg/I) (mg/I) (mg/I) (m i cromhos/ (rat i o) LY4MU 11/30/2011 ENER 733 1130 4490 1/3 1/2012 E N ER 723 1170 4480

• 6667 2/29/2012 ENER 725 1180 4530

• 6600 3/31/2012 HMC 6585 4/30/2 0 12 ENER 721 1190 4 740

• 6600 5/3 1/20 12 ENER 723 12 2 0 4640

• 6589 6/3 0/20 12 ENER 691 116 0 4720 7/27/2 0 12 E N ER 775 1260 4550

• 6568 8/31/2012 ENER 75 9 1250 4820

• 6554 9/28/2 012 E N E R 736 1190 4 370

• 6519 10/3 1/2 012 ENER 757 1220 4 340

• 6 4 76 11 /28/2012 ENER 791 1300 4220

• 6513 1/31/2013 ENER 766 1240 4340 *6540 2/2 2/2 013 ENER 777 1240 4 2 70

• 6416 3/26/2 013 HMC 766 1230 4170 5467 4/3 0/2013 ENER 789 1250 4240

• 5137 12/1 2/2 013 E N ER 761 1250 4370

• 6454 3/28/20 1 4 E N ER 7 5 3 1 24 0 4 400 12/2 3/20 1 4 E N ER 731 122 0 45 10 3/31/2015 ENER 799 1240 4600 6/30/2015 ENER 782 1290 4520

• 5097 9/3 0/20 15 ENER 791 1260 446 0 *6404 11/11/2015 ENER 787 1270 4410 LY28-1 10/16/2009 ENER 101 358 852

• 1286 11/13/2 0 0 9 ENER 187 74.2 3.80 331 232 < 5.00 174 1040 18 5 0

• 2650 0.980 12/18/2 0 0 9 E N ER 308 6 1.7 3.40 3 45 399 < 5.00 184 1240 2320

• 3130 0.942 12/3 0/2009 ENER 298 61.4 3.20 354 378 < 5.00 180 1 22 0 2 4 6 0

• 3163 0.961 1/31/20 10 E N ER 187 13 50 25 5 0 2/22/2010 ENER 186 1350 2450

• 3250

• Signifies Specific Co nducti v ity from HMC c-30 -------------------

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Table C-1 WATER QUALITY ANALYSIS FOR LYSIMETERS (cont.) Major Constituents Sample Point Ca Mg K Na HC03 C03 Cl 504 TDS Cond(calc.)

lon_B Name Date Lab (mg/I) (mg/I) (mg/I) (mg/I) (mg/I) (mg/I) (mg/I) (mg/I) (mg/I) (micromhos/ (ratio) LY28-1 3/25/2010 ENER 183 1300 2660

• 3240 4/29/2010 ENER 190 1340 2580

• 3250 5/31/2010 ENER 191 1350 2550

• 3270 6/30/2010 ENER 197 1380 2650

• 3280 7/27/2010 ENER 20 1 1410 2670

• 3250 8/31/2010 ENER 200 1360 2610

• 3270 9/30/2010 ENER 192 1350 2700 10/31/2010 ENER 190 1330 2600

• 3290 11/30/2010 ENER 191 1310 2660

• 3300 1/31/2011 ENER 198 1400 2530

• 3260 2/25/2011 ENER 187 1290 2590

• 3240 3/29/2011 HMC 3410 4/29/2011 ENER 194 1340 2540

• 3220 5/26/2011 HMC 3200 6/30/2011 ENER 197 1350 2540

• 3220 7/15/2011 ENER 193 1330 2510

• 3200 8/31/2011 ENER 187 1350 2530

• 3200 9/30/2011 ENER 176 1370 2660

• 3290 10/31/2011 ENER 192 1390 2670

• 3470 11/30/2011 ENER 183 1380 2770 12/16/2011 ENER 181 1440 2830

• 3575 1/31/2012 ENER 179 1400 2630

• 3568 2129/2012 ENER 176 1380 2870

• 3540 4/30/2012 ENER 190 1360 3080

• 3658 5/31/2012 ENER 193 1400 3040

• 3594 6/30/2012 ENER 176 1310 3000

• 3547 7/27/2012 ENER 192 1400 2920

• 3538 8/31/2012 ENER 181 1360 3010

• 3542 9/28/2012 ENER 187 1370 2860

• 3526

• Signifies Specific Conductivity from HMC c -31 Table C-1 WATER QUALITY ANALYSIS FOR LYSIMETERS (cont.) Major Constituents Sample Point Ca Mg K Na HC03 C03 Cl 504 TDS Cond(calc.) lon_B Name Date Lab (mg/I) (mg/I) (mg/I) (mg/I) (mg/I) (mg/I) (mg/I) (mg/I) (mg/I) (micromhos/ (ratio) L Y28-1 10/31/2012 ENER 186 1380 2920

• 3558 11/28/2012 ENER 248 1180 2570

• 3297 12/30/2012 ENER 291 1280 2590

• 3524 1/31/2013 ENER 229 1070 2280

• 3295 2/22/2013 ENER 261 1190 26900

• 33.5 3/26/2013 HMC 266 1170 2680 3332 4/30/2013 ENER 270 1210 2670

• 3382 9/17/2013 ENER 261 11 80 2660

• 3377 12/12/2013 ENER 269 1240 2690

• 3380 3/28/2014 ENER 268 1 290 2710 6/27/2014 ENER 276 13 20 2720 12/23/2014 ENER 264 1240 2650 3/31/2015 ENER 276 1290 2680

• 3350 6/30/2015 ENER 278 1340 2670

• 2510 9/30/2015 ENER 354 1780 3470

• 4100 11/11/2015 ENER 339 1790 3380 LY28-1M 10/16/2009 ENER 114 84.0 440

• 698 LY28-2 10/16/2009 ENER 335 218 954

• 1580 5/26/2011 HMC 1240 10/31/2011 ENER 178 3280 5170

• 6660 11/30/2011 ENER 128 3560 6090 12/16/2011 ENER 139 3790 6100

• 7151 1/31/2012 ENER 144 3680 6110

• 6988 2/29/2012 ENER 149 3150 5350

• 6110 4/30/2012 ENER 107 3130 5630

• 6062 5/31/2012 ENER 90.0 3270 5500

• 6165 6/30/2012 ENER 102 3630 6310

• 6761 7/27/2012 ENER 156 4050 6690

• 7611

• Signifies Specific Conductivity from HMC c ------------------

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Table C-1 WATER QUALITY ANALYSIS FOR LYSIMETERS (cont.) Major Constituents Sample Point Ca Mg K Na HC03 C03 Cl 504 TDS Cond(calc.)

lon_B Name Date Lab (mg/I) (mg/I) (mg/I) (mg/I) (mg/I) (mg/I) (mg/I) (mg/I) (mg/I) (micromhos/ (ratio) LY28-2 8/31/2012 ENER 195 2940 5130

• 5980 9/28/2012 ENER 246 2580 4860

• 5437 10/31/2012 ENER 217 2300 4170

• 4840 11/28/2012 ENER 257 2270 3920

• 4641 12/30/2012 ENER 262 2160 3820

• 4591 1/31/2013 ENER 267 2160 3830

• 4594 2/22/2013 ENER 271 2060 3590

• 4429 3/26/2013 HM C 276 2070 3890 4470 4/30/2013 ENER 279 2120 3840

• 4509 9/17/2013 ENER 263 2280 4320

• 4894 12/12/2013 ENER 266 2510 4410

• 4964 3/28/2014 ENER 267 2490 4310 6/27/2014 ENER 284 2550 4410 12/23/2014 ENER 310 2710 4720 3/31/2015 ENER 365 2910 4910 6/30/2015 ENER 734 5750 4900 9/30/2015 ENER 277 2810 4860

• 5392 11/11/2015 ENER 331 2880 4910 LY28-2M 10/16/2009 ENER 158 255 773

• 1176 11 /13/2009 ENER 147 60.5 7.80 106 414 6.00 128 304 937

• 1560 1.01 12/18/2009 ENER 150 54.5 6.90 83.6 447 < 5.00 123 247 980

• 1482 0.980 12/3 0/2009 ENER 143 51.5 7.30 80.2 438 < 5.00 120 202 939

• 1544 1.01 1/31/2010 ENER 115 156 901 2/22/2010 ENER 113 132 756

• 1280 3/25/2010 ENER 107 111 858

• 1260 4/29/2010 ENER 120 106 778

• 1250 5/31/2010 ENER 110 95.0 787

• 1300 6/30/2010 ENER 112 93.0 847

• 1290 7/27/2010 ENER 109 89.0 842

• 1230 *Signifies Specific Conductivity from HMC c -33 Table C-1 WATER QUALITY ANALYSIS FOR LYSIMETERS (cont.) Major Constituents S a mp le Po i n t Ca M g K N a H C 03 C 0 3 Cl S04 TDS C o n d (ca lc.) l o n_B N am e Date La b (m g/I) (mg/I) (mg/I) (mg/I) (mg/I) (mg/I) (mg/I) (mg/I) (mg/I) (mi cromho s/ (ra tio) LY28-2M 8/31/2010 ENER 112 88.0 841

• 1260 9/30/2010 ENER 108 83.0 896 10/31/2010 ENER 110 84.0 891

• 1200 11/30/2010 ENER 108 83.0 956

• 1220 1/31/2 011 ENER 108 99.0 763

• 1230 2/25/20 11 ENER 111 9 6.0 8 13

• 1210 6/30/2 0 11 ENER 109 99.0 760

• 1190 7/15/2 0 11 ENER 104 97.0 753 *1160 8/31/2 0 11 E N ER 902 3540 7150

• 8320 9/3 0/2 0 11 ENER 86 5 3490 6850

• 8060 10/31/2011 ENER 801 3330 6450

• 7780 11/30/2011 ENER 696 2820 5760 12/16/2 011 ENER 651 2500 5000

• 5995 1/31/2 012 ENER 560 2110 4 080

• 5476 2/2 9/2 012 ENER 491 1890 3750

• 4986 4/30/2 0 12 ENER 412 1570 3570

• 4284 5/31/20 12 ENER 320 1090 258 0

• 3305 6/30/20 12 E N ER 2 48 725 1 900

• 2587 7/27/2 0 12 E N ER 210 483 1 4 7 0

• 204 4 8/31/2 0 12 ENER 777 3340 6760

• 8112 9/28/2012 ENER 774 2940 6240

• 7836 10/31/2 0 12 ENER 874 3120 65 30

• 8181 11 /28/2012 ENER 953 2470 6770

• 8672 12/30/2012 ENER 1030 3390 7140

• 1344 1/31/2013 ENER 1050 3470 7280

• 9181 2/22/2 013 ENER 1020 3560 734 0

• 9070 3/26/2 013 HMC 954 3540 7 5 50 8840 4/3 0/2013 ENER 919 35 9 0 7010

• 7171 9/17/2 0 13 ENER 848 3050 6180

• 8350 *Signifies Spec i fic Conductivity from HMC c-34 -------------------

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Table C-1 WATER QUALITY ANALYSIS FOR LYSIMETERS (cont.) Major Constituents Sample Point Ca Mg K Na HC03 C03 Cl S04 TDS Cond(calc.)

lon_B Name Date Lab (mg/I) (mg/I) (mg/I) (mg/I) (mg/I) (mg/I) (mg/I) (mg/I) (mg/I) (micromhos/ (ratio) LY28-2M 12/12/2013 ENER 834 3000 6170

• 7816 3/28/2014 ENER 813 2900 6290 LY28-3 10/16/2009 ENER 190 781 1710

• 2476 1 1 /13/2009 ENER 306 96.9 10.00 983 421 < 5.00 290 2300 4110

• 5560 1.05 12/18/2009 ENER 392 126 11.0 1200 399 < 5.00 318 3030 5220

• 6638 1.05 12/30/2009 ENER 426 126 11.0 1260 394 < 5.00 339 3260 5720

• 6961 1.03 1/31/2010 ENER 339 3380 5770 2/22/2010 ENER 344 3520 5880

• 7360 3/25/2010 ENER 347 3360 6360

• 7320 4/29/2010 ENER 350 3590 6340

• 7470 5/31/2010 ENER 410 3730 6600

• 7920 6/30/2010 ENER 471 3850 7210

• 8340 7/27/2010 ENER 597 3690 7160

• 8200 8/31/2010 ENER 786 3420 6660 10/31/2011 ENER 17 1 943 1950

• 2760 11/30/2011 ENER 353 2610 4830 12/16/2011 ENER 444 2910 5570

• 6614 1/31/2012 ENER 578 3420 6560

• 7946 2/29/2012 ENER 560 3390 6810

• 7983 4/30/2012 ENER 668 3590 8150

• 8922 5/31/2012 ENER 767 3730 8090

• 9556 6/30/2012 ENER 864 3640 8600

• 9967 7/27/2012 ENER 1150 3830 9000

• 10950 8/31/2012 ENER 1130 4310 9540

• 11460 9/28/2012 ENER 1150 4350 9830.

• 11790 10/31/2012 ENER 1170 4260 8950

• 11370 11128/2012 ENER 610 4240 8050

• 10000 12/30/2012 HMC 9920 1/31/2013 ENER 755 4240 8310

• 10330

• Signifies Specific Conductivity from HMC c -35 Table C-1 WATER QUALITY ANALYSIS FOR LYSIMETERS (cont.) Major Constituents Sample Point Ca Mg K Na HC03 C03 Cl 504 TDS Cond(calc.)

lon_B Name Date Lab (mg/I) (mg/I) (mg/I) (mg/I) (mg/I) (mg/I) (mg/I) (mg/I) (mg/I) (micromhos/ (ratio) LY28-3 2/22/2013 ENER 726 4110 8550

• 10250 3/26/2013 HMC 781 4340 8380 10240 4/30/2013 ENER 747 4300 9450

• 8585 9/17/2013 ENER 740 4080 8330

• 10180 12/12/2013 ENER 766 4190 8130

• 10090 12/30/2013 ENER 713 4210 8400 3/28/2014 ENER 777 4150 8370 6/27/2014 ENER 779 4090 8520 9/30/2014 ENER 824 4440 8650 12/23/2014 ENER 803 4090 8590 3/31/2015 ENER 851 4240 8700

• 10230 6/30/2015 ENER 832 4190 8620

• 8582 9/30/2015 ENER 873 4290 8820

• 10400 11/11/2015 ENER 908 4330 8560 LY34-1 10/16/2009 ENER 124 239 1060

• 1620 12/30/2009 ENER 292 77.1 2.50 543 667 < 5.00 310 1160 2630

• 3763 1.01 2/22/2010 ENER 321 1230 2760

• 3940 3/25/2010 ENER 326 1240 3120

• 4030 4/29/2010 ENER 359 1350 3130

• 4090 5/31/2010 ENER 353 1340 3050

• 4140 6/30/2010 ENER 362 1370 3250

• 4190 7/27/2010 ENER 362 1380 3220

• 3920 8/31/2010 ENER 362 1410 3490

• 4190 9/30/2010 ENER 375 1450 3530 10/31/2010 ENER 514 1910 5220

• 5390 11/30/2010 ENER 501 1890 4230

• 5360 1/31/2011 ENER 482 1910 4370

• 5310 2/25/2011 ENER 498 1970 4170

• 5400 3/31/2011 ENER 532 2080 4370

• 5400

• Signifies Specific Conductivity from HMC c ------------------

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Table C-1 WATER QUALITY ANALYSIS FOR LYSIMETERS (cont.) Major Constituents Sample Point Ca Mg K Na HC03 C03 Cl 504 TDS Cond(calc.)

lon_B Name Date Lab (mg/I) (mg/I) (mg/I) (mg/I) (mg/I) (mg/I) (mg/I) (mg/I) (mg/I) (micromhos/ (ratio) L Y34-1 4/29/2011 ENER 506 1980 4240

• 5420 6/30/2011 ENER 514 2040 4240

• 5430 7/15/2011 ENER 489 1970 4180

• 5640 8/31/2011 ENER 508 2030 4070

• 5760 9/30/2011 ENER 498 2030 4140

• 5580 10/31/2011 ENER 488 2040 4070

• 6620 11/30/2011 ENER 494 1960 4080 12/16/2011 ENER 501 2060 4210

• 5590 2/29/2012 ENER 476 1960 4000

• 5560 4/30/2012 ENER 491 1980 4670

• 5623 5/31/2012 ENER 465 1920 4330 6/30/2012 ENER 468 1900 3920

• 5598 7/27/2012 ENER 511 1970 4130

• 5254 8/31/2012 ENER 663 2460 5060

• 64 7 5 9/28/2012 ENER 524 2560 5130

• 6571 10/31/2012 ENER 426 2380 4970

• 6012 11/28/2012 ENER 436 2490 5090

• 6046 12/30/2012 ENER 445 2510 4810

• 6102 1/31/2013 ENER 451 2500 4810

• 6091 2/22/2013 ENER 437 2410 4920

• 6017 3/26/2013 HMC 464 2470 4990 4990 4/30/2013 ENER 462 2460 4690

• 4814 9/17/2013 ENER 471 2370 4600

• 6153 1 2/12/2013 ENER 479 2390 4920

• 6044 3/28/2014 ENER 497 2510 5090 6/27/2014 ENER 507 2530 5340 9/30/2014 ENER 535 2810 5460 12/23/2014 ENER 493 2640 5530 6/30/2015 ENER 526 2800 5830

• 5454

• S i gnifies Specific Conductivity from HMC c -37 Table C-1 WATER QUALITY ANALYSIS FOR LYSIMETERS (cont.) Major Constituents Sample Point Ca Mg K Na HC03 C03 Cl 504 TDS Cond(calc.) lon_B Name Date Lab (mg/I) (mg/I) (mg/I) (mg/I) (mg/I) (mg/I) (mg/I) (mg/I) (mg/I) (micromhos/ (ratio) LY34-1 9/30/2015 ENER 473 2780 6030

• 6996 LY34-2 10/16/2009 ENER 96.0 214 590

• 1000 11 /13/2009 ENER 175 69.4 12.3 354 457 < 5.00 315 676 1850

• 2950 0.985 12/18/2009 ENER 231 84.8 10.8 387 372 < 5.00 397 868 1220

• 3413 1.00 12/30/2009 ENER 192 85.6 11.8 436 567 < 5.00 377 799 2250

• 3339 0.977 1/31/2010 ENER 467 1020 2500 2/22/2010 ENER 514 1190 2960

• 4160 3/25/2010 ENER 515 1250 3460

• 4710 4/29/2010 ENER 653 1600 3720 5/31/2010 ENER 659 1710 3660 6/30/2010 ENER 723 1950 4180 7/27/2010 ENER 710 1910 4450

• 5660 8/31/2010 ENER 686 1550 3470 9/30/2010 ENER 651 1350 3640 10/31/2010 ENER 689 1880 3090

• 5650 11/30/2010 ENER 632 2220 4930

• 6060 1/31/2011 ENER 810 2770 5400

• 6970 2/25/2011 ENER 856 2900 6220

• 7500 3/31/2011 ENER 884 2940 6250

• 7620 4/29/2011 ENER 911 2930 6130 5/26/2011 HMC 7860 6/30/2011 ENER 939 2950 5980

• 7880 7/13/2011 HMC 5640 10/31/2011 ENER 57.0 124 464

• 786 11/30/2011 ENER 134 321 1130

• 7740 12/16/2011 ENER 143 400 1360

• 1913 1/31/2012 ENER 384 868 2440 2/29/2012 ENER 219 537 1860 8/31/2012 ENER 453 1910 3930

• 5085

• Signifies Specific Conductivity from HMC c ------------------

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Table C-1 WATER QUALITY ANALYSIS FOR LYSIMETERS (cont.) Major Constituents Sample Point Ca Mg K Na HC03 C03 Cl 804 TDS Cond(calc.) lon_B Name Date Lab (mg/I) (mg/I) (mg/I) (mg/I) (mg/I) (mg/I) (mg/I) (mg/I) (mg/I) (micromhos/ (ratio) LY34-2 9/28/2012 ENER 501 2170 4610

• 5584 10/31/2012 ENER 444 2320 4670

• 5557 11/28/2012 ENER 417 2230 4360

• 5307 12/30/2012 ENER 403 2110 4140

• 5077 1/31/2013 ENER 413 2100 4080

• 5168 2/22/2013 ENER 402 2010 4240

• 5080 3/26/2013 HMC 424 2040 4190 5052 4/30/2013 ENER 420 1990 4120

• 4023 9/17/2013 ENER 442 1960 4190

• 5288 12/12/2013 ENER 449 2000 4200

• 5246 3/28/2014 ENER 441 1980 4160 12/23/2014 ENER 456 1960 4320 9/30/2015 ENER 71.0 2520 4190

• 4926 11/11/2015 ENER 80.0 2840 4600 LY34-3 10/16/2009 ENER 96.0 102 637

• 920 11 /13/20 09 ENER 90.9 44.0 4.30 229 488 6.00 128 277 956

• 1660 1.04 12/18/2009 ENER 178 78.0 3.90 338 648 < 5.00 184 766 1900

• 2760 0.943 12/3 0/2009 ENER 234 105 4.70 456 680 < 5.00 211 904 2170

• 3030 1.12 1/31/2010 ENER 231 983 2410 2/22/2010 ENER 244 1030 2370

• 3350 3/25/2010 ENER 250 1020 2630

• 3460 4/29/2010 ENER 279 1100 2580

• 3520 5/31/2010 ENER 287 1120 2580

• 3610 6/30/2010 ENER 293 1120 2790

• 3680 7/27/2010 ENER 321 1220 2780

• 3700 8/31/2010 ENER 302 1130 2780

• 3780 9/30/2010 ENER 322 1210 2990 10/31/2010 ENER 315 1150 2330

• 3850 11/30/2010 ENER 323 1160 3030

• 3920 *Signifies Specific Conductivity from HMC c -39 Table C-1 WATER QUALITY ANALYSIS FOR LYSIMETERS (cont.) Major Constituents Samp le Po int C a Mg K N a H C 0 3 C 03 C l 50 4 TD S C o nd(ca l c.) l on_B N am e Dat e La b (mg/I) (mg/I) (mg/I) (m g/I) (mg/I) (m g/I) (mg/I) (mg/I) (m g/I) (micr om h os/ (ra ti o) L Y34-3 1/31/2011 ENER 314 1170 2990

• 3960 2/2 5/2 011 ENER 329 1040 35 30

• 3880 3/31/2011 ENER 394 1 050 2790

• 3860 4/29/2011 ENER 428 996 2850

• 3950 6/30/2 0 11 ENER 541 1010 2980

• 4100 7/1 5/2 0 11 ENER 566 1020 3050

• 4380 8/3 1/2 0 11 ENER 631 1 0 7 0 32 00

• 4570 9/3 0/2 0 11 ENER 620 1090 3210

• 4540 10/31/2011 ENER 580 1140 3080

• 45.1 11/3 0/20 11 E NER 603 1170 31 4 0 12/16/2 011 ENER 606 1250 3340

• 4640 1/31/2012 ENER 601 1290 3410

• 4748 2/29/2012 ENER 577 1280 3380 *4610 4/3 0/2 0 12 EN E R 552 1290 3600

• 4591 5/31/2 0 12 ENER 645 1 600 4100

• 5226 6/30/2 0 12 ENER 830 2150 5800

• 6719 7/27/2012 ENER 826 2310 5230

• 6765 8/31/20 1 2 ENER 1100 3310 7 0 9 0

• 8 9 25 9/2 8/20 1 2 ENER 871 285 0 59 00

• 7942 10/3 1/2012 ENER 742 2580 5450

• 6955 11/28/2 012 ENER 652 2 510 4570

• 6417 12/3 0/2 012 ENER 550 2270 4 580

• 6023 1/3 1/2013 ENER 466 2010 4320

• 5469 2/22/2 013 ENER 386 1700 3890

• 48.5 3/26/2013 HMC 401 1700 3860 4830 4/30/20 13 ENER 407 1720 3670

• 3763 9/171 20 13 ENER 537 2070 4480

• 5968 12/12/20 13 ENER 542 20 80 4 58 0

• 5 83 0 3/2 8/2 0 14 ENER 495 1930 4250

• S ignifies S p ecific C o n d uctivity from HMC C-40 -------------------

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Table C-1 WATER QUALITY ANALYSIS FOR LYSIMETERS (cont.) Major Constituents Sample Point Ca Mg K Na HC03 C03 Cl S04 TDS Cond(calc.)

lon_B Name Date Lab (mg/I) (mg/I) (mg/I) (mg/I) (mg/I) (mg/I) (mg/I) (mg/I) (mg/I) (micromhos/ (ratio) LY34-3 6/27/2014 ENER 547 2170 4610 LY34-4 10/16/2009 ENER 74.0 322 854

• 1245 11113/2009 EN ER 58.4 18.3 4.20 289 335 6.00 106 384 977

• 1660 1.03 12/18/2009 ENER 80.3 20.7 3.70 347 329 13.0 130 501 1260

• 1996 1.05 12/30/2009 ENER 110 22.6 3.40 331 295 8.00 146 608 1470

• 2038 0.998 1/31/2010 ENER 163 763 1630 7/27/2010 HMC 4850 8/31/2010 ENER 259 1350 2960

• 3930 9/30/2010 ENER 269 1480 3450 *Signifies Specific Conductivity from HMC c -41 TABLE C-2 WATER QUALITY ANALYSIS FOR LYSIMETERS (cont.) Minor Constituents Sample Point pH Unat Mo Se N03 Ra226 Ra228 v Th230 Name Date Lab (std. units) (mg/I) (mg/I) (mg/I) (mg/I) (pCi/I) (pCi/I) (mg/I) (pCi/I) LY1 712212009 ENER 0.0420 0.0400 0.0300 1.14 8/13/2009 ENER 0.0878 < 0.0300 0.0500 1.10 9/23/2009 ENER 7.77 0.0519 0.0300 0.0350 1.90 10/16/2009 ENER 0.0540 < 0.0300 0.0400 1.70 11/13/2009 ENER 8.17 0.0487 < 0.0300 0.0390 2.80 12/18/2009 ENER 7.81 0.0656 < 0.0300 0.0470 2.20 12/30/2009 ENER 7.80 0.0585 < 0.0300 0.0790 1.80 1/31/2010 ENER 0.0506 < 0.0300 0.0720 1.60 2/22/2010 ENER 0.0506 < 0.0300 0.0820 1.50 3/25/2010 ENER 0.0471 < 0.0300 0.105 1.40 4/29/2010 ENER 0.047 1 < 0.0300 0.0860 1.30 5/31/2010 ENER 0.0527 0.0300 0.116 1.20 6/30/2010 ENER 0.0574 < 0.0300 0.115 1.30 7/27/2010 ENER 0.0532 < 0.0300 0.127 1.30 12/16/2011 ENER 0.0496 < 0.0300 0.115 1/31/2012 ENER 0.0493 < 0.0300 0.142 2/29/2012 ENER 0.0447 < 0.0300 0.152 4/30/2012 ENER 0.0481 < 0.0300 0.149 5/31/2012 ENER 0.0445 < 0.0300 0.134 6/30/2012 ENER 0.0460 < 0.0300 0.129 7/27/2012 ENER 0.0442 < 0.0300 0.127 8/31/2012 ENER 0.0471 < 0.0300 0.143 9/28/2012 ENER 0.0443 < 0.0300 0.134 10/31/2012 ENER 0.0470 < 0.0300 0.168 11 /28/2012 ENER 0.0488 < 0.0300 0.150 1/31/2013 ENER 0.0467 < 0.0300 0.178 2/22/2013 ENER 0.0504 < 0.0300 0.187 4.70 3/26/2013 HMC 0.0475 < 0.0300 0.182 5.00 4/30/2013 ENER 0.0487 < 0.0300 0.174 c ------------------

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TABLE C-2 WATER Q U ALITY A N AL Y S IS F OR LYSI M E TER S (con t.) Min o r Constituents Sample Point pH Unat M o Se N 03 R a 226 Ra228 v Th230 Name D a te Lab (std. units) (mg/I) (mg/I) (mg/I) (mg/I) (pCi/I) (pCi/I) (mg/I) (pCi/I) LY 1 12/12/2013 ENER 0.0296 < 0.03 0 0 0.0780 7.80 3/28/2 014 ENER 0.02 8 7 < 0.03 0 0 0.0910 8.40 6/27/2014 ENER 0.0277 < 0.0300 0.100 8.10 9/30/2014 ENER 0.0257 < 0.03 0 0 0.0970 1 2/23/2014 ENER 0.0262 < 0.0300 0.103 3/31/2015 ENER 0.0268 < 0.0300 0.131 9.60 6/30/2015 ENER 0.0270 < 0.0300 0.124 9.30 9/30/2015 E NER 0.0259 < 0.0300 0.109 8.60 LY2 6/24/2009 ENER 0.0406 0.0400 0.0140 3.31 12/16/2011 ENER 0.0630 < 0.03 0 0 0.161 1/31/2012 ENER 0.06 52 < 0.0300 0.140 3/31/2 012 ENER 0.0 63 6 < 0.0 300 0.110 4/30/2012 ENER 0.0544 < 0.0300 0.124 5/31/2012 ENER 0.0475 < 0.0300 0.110 6/30/2012 ENER 0.0470 < 0.0300 0.100 7/27/2012 ENER 0.0538 < 0.0 3 0 0 0.171 8/31/2012 ENER 0.0758 < 0.03 0 0 0.2 7 1 9/28/2 0 12 ENER 0.0640 < 0.0 3 00 0.171 11/28/2012 ENER 0.0635 < 0.0300 0.131 12/30/2012 ENER 0.0563 < 0.0300 0.138 1/31/2013 ENER 0.0606 < 0.0300 0.148 3/28/2014 E NER 0.0 4 23 < 0.03 00 0.1 0 1 1 6.0 LY4 12/4/2008 ENER 0.0 5 66 < 0.0300 0.04 0 0 1.20 12/5/20 0 8 ENER 0.0624 < 0.03 0 0 0.0600 0.900 12/8/2008 ENER 0.0715 0.04 0 0 0.0460 0.600 12/11/2 00 8 EN E R 0.0 644 < 0.0300 0.0450 0.660 12/12/20 0 8 EN E R 0.0 641 < 0.030 0 0.0440 0.650 1/7/20 0 9 E NER 0.0813 < 0.03 0 0 0.04 10 0.870 c -43 TABLE C-2 WATER QUALITY ANALYSIS FOR LYSIMETERS (cont.) Minor Constituents Sample Point pH Unat Mo Se N03 Ra226 Ra228 v Th230 Name Date Lab (std. units) (mg/I) (mg/I) (mg/I) (mg/I) (pCi/I) (pCi/I) (mg/I) (pCi/I) LY4 2/18/2009 ENER 7.44 0.0655 < 0.0300 0.0410 1.40 312012009 ENER 0.0732 < 0.0300 0.0430 1.72 4/18/2009 ENER 0.0589 < 0.0300 0.0350 0.800 5/15/2009 ENER 0.0611 < 0.0300 0.0380 1.46 6/10/2009 ENER 0.0630 < 0.0300 0.0550 0.800 612412009 ENER 0.0621 < 0.0300 0.0500 0.560 712212009 ENER 0.0636 < 0.0300 0.0430 0.460 8/13/2009 ENER 0.0718 < 0.0300 0.0400 0.600 912312009 ENER 7.29 0.0664 < 0.0300 0.0340 0.500 10/16/2009 ENER 0.0701 < 0.0300 0.0310 0.500 11113/2009 EN ER 7.84 0.0652 < 0.0300 0.0330 0.600 12/18/2009 ENER 7.58 0.0651 < 0.0300 0.0310 0.500 12/30/2009 ENER 7.60 0.0643 < 0.0300 0.0340 0.600 1/31/2010 ENER 0.0702 < 0.0300 0.0380 0.500 2/22/2010 ENER 0.0732 < 0.0300 0.0350 0.500 3/25/2010 ENER 0.0720 < 0.0300 0.0360 0.500 4/29/2010 ENER 0.0699 < 0.0300 0.0380 0.600 5/31/2010 ENER 0.0833 < 0.0300 0.0540 0.600 6/30/2010 ENER 0.0766 < 0.0300 0.0420 0.600 7/27/2010 ENER 0.0707 < 0.0300 0.0420 0.700 8/31/2010 ENER 0.0708 < 0.0300 0.0420 0.800 9/30/2010 ENER 0.0682 < 0.0300 0.0450 1.10 10/31/2010 ENER 0.06 7 2 < 0.0300 0.0440 11/30/2010 ENER 0.0610 < 0.0300 0.0520 1/31/2011 ENER 0.0514 < 0.0300 0.0590 2/25/2011 ENER 0.0460 < 0.0300 0.0600 3/3112011 ENER 0.0421 < 0.0300 0.0570 8/31/2011 ENER 0.0295 < 0.0300 0.0670 9/30/2011 ENER < 0.0003 < 0.0300 < 0.0050 c-44 -------------------

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TABLE C-2 WATER QUALITY ANALYSIS FOR LYSIMETERS (cont.) Minor Constituents Sample Point pH Unat Mo Se N03 Ra226 Ra228 v Th230 Name Date Lab (std. units) (mg/I) (mg/I) (mg/I) (mg/I) (pCi/I) (pCi/I) (mg/I) (pCi/I) LY4 10/31/2011 ENER 0.0227 < 0.0300 0.0810 11/30/2011 ENER 0.0287 < 0.0300 0.0770 1/31/2012 ENER 0.0183 < 0.0300 0.0950 4/30/2012 ENER 0.0226 < 0.0300 0.0980 5/31/2012 ENER 0.0217 < 0.0300 0.0920 6/30/2012 ENER 0.0232 < 0.0300 0.0880 7/27/2012 ENER 0.0270 < 0.0300 0.0900 8/31/2012 ENER 0.0288 < 0.0300 0.104 9/28/2012 ENER 0.112 < 0.0300 < 0.0050 11/28/2012 ENER 0.0258 < 0.0300 0.108 3/26/2013 HMC 0.0169 < 0.0300 0.114 1.10 3/28/2014 ENER 0.0122 < 0.0300 0.119 1.10 6/27/2014 ENER 0.0118 < 0.0300 0.131 1.20 9/30/2014 ENER 0.0139 < 0.0300 0.134 6/30/2015 ENER 0.0105 < 0.0300 0.146 1.90 LY4ML 4/18/2009 ENER 0.0188 0.120 0.0050 0.200 6/24/2009 ENER 0.358 0.110 <. 0.0050 10.00 7/22/2009 ENER 0.552 0.0900 0.0100 0.0200 8/13/2009 ENER 0.421 0.0600 < 0.0050 < 0.100 9/23/2009 ENER 7.76 0.268 0.0400 0.0100 < 0.100 10/16/2009 ENER 0.244 0.0400 0.0060 < 0.100 11/13/2009 ENER 8.35 0.508 0.0900 0.0110 < 0.100 12/18/2009 ENER 7.55 0.214 < 0.0300 0.0050 < 0.100 4/29/2010 ENER 0.292 0.0500 0.0110 < 0.100 5/31/2010 ENER 0.463 0.0900 0.0150 < 0.100 6/30/2010 ENER 0.482 0.110 0.0120 < 0.100 7/27/2010 ENER 0.375 0.0900 0.0170 < 0.100 8/31/2010 ENER 0.366 0.0900 0.0150 < 0.100 9/30/2010 ENER 0.394 0.100 0.0130 < 0.100 c-45 j TABLE C-2 WATER QUALITY ANALYSIS FOR LYSIMETERS (cont.) Minor Constituents Sample Point pH Unat Mo Se N03 Ra226 Ra228 v Th230 Name Date Lab (std. units) (mg/I) (mg/I) (mg/I) (mg/I) (pCi/I) (pCi/I) (mg/I) (pCi/I) LY4ML 10/31/2010 ENER 0.394 0.100 0.0140 11/30/2010 ENER 0.453 0.140 0.0180 4/29/2011 ENER 0.461 0.570 0.0430 10/31/2011 ENER 0.660 0.0600 0.0260 LY4MU 7/22/2009 ENER 0.261 0.140 0.0100 0.0200 8/13/2009 ENER 0.596 0.160 0.0060 < 0.100 9/23/2009 ENER 7.68 0.563 0.120 0.0090 < 0.100 10/16/2009 ENER 0.557 0.100 0.0090 < 0.100 11 /13/2009 ENER 8.04 0.212 0.0300 0.0090 < 0.100 1/31/2010 ENER 0.504 0.0500 0.0100 < 0.100 2/22/2010 ENER 0.516 0.0500 0.0100 0.800 3/25/2010 ENER 0.574 0.0500 0.0100 1.80 4/29/2010 ENER 0.546 0.0400 0.0120 2.30 5/31/2010 ENER 0.626 0.0400 0.0130 3.20 6/30/2010 ENER 0.617 0.0400 0.0090 3.50 7/27/2010 ENER 0.600 0.0400 0.0110 3.50 8/31/2010 ENER 0.0395 0.350 0.0460 4.10 9/30/2010 ENER 0.691 0.0500 0.0060 3.80 10/31/2010 ENER 0.633 0.0400 0.0060 11/30/2010 ENER 0.628 0.0400 0.0100 1/31/2011 ENER 0.644 0.0400 0.0130 2/25/2011 ENER 0.662 0.0400 0.0140 4/29/2011 ENER 0.632 0.0500 0.0120 6/30/2011 ENER 0.649 0.0500 0.0180 7/15/2011 ENER 0.569 0.0600 0.0100 8/31/2011 ENER 0.582 0.0600 0.0100 9/30/2011 ENER 0.646 0.0600 0.0060 11/30/2011 ENER 0.640 0.0600 0.0180 1/31/2012 ENER 0.593 0.0600 0.0130 C-46 -------------------

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TABLE C-2 WATER QUALITY ANALYSIS FOR LYSIMETERS (cont.) Minor Constituents Sample Point pH Unat Mo Se N03 Ra226 Ra228 v Th230 Name Date Lab (std. units) (mg/I) (mg/I) (mg/I) (mg/I) (pCi/I) (pCi/I) (mg/I) (pCi/I) LY4MU 2/29/2012 ENER 0.610 0.0900 0.0170 4/30/2012 ENER 0.582 0.0600 0.0100 5/31/2012 ENER 0.600 0.0600 0.0110 6/30/2012 ENER 0.586 0.0600 0.0120 7/27/2012 ENER 0.592 0.0600 0.0050 8/31/2012 ENER 0.573 0.0600 < 0.0050 9/28f2012 ENER 0.145 0.0400 0.518 10/31/2012 ENER 0.554 0.0600 0.0060 11/28/2012 ENER 0.550 0.0600 < 0.0050 1/31/2013 ENER 0.544 0.0600 0.0060 2/22/2013 ENER 0.526 0.0700 0.0130 7.10 3/26/2013 HMC 0.491 0.0600 0.0050 7.10 4/30/2013 ENER 0.497 0.0600 0.0090 12/12/2013 ENER 0.463 0.0700 0.0090 9.90 3/28/2014 ENER 0.426 0.0700 0.0150 8.90 12/23/2014 ENER 0.449 0.0600 0.0140 3/31/2015 ENER 0.397 0.0800 0.0170 9.10 6/30/2 0 15 ENER 0.420 0.0900 0.0160 8.80 9/30/2015 ENER 0.370 0.0900 0.0130 8.10 11/11/2015 ENER 0.358 0.100 0.0090 8.50 LY28-1 10/16/2009 ENER 0.0224 0.0500 0.0100 2.60 11 /13/2009 ENER 8.19 0.0489 < 0.0300 0.0250 4.40 12/18/2009 ENER 7.77 0.131 < 0.0300 0.0310 0.900 12/30/2009 ENER 7.83 0.161 < 0.0300 0.0420 6.60 1/31/2010 ENER 0.149 < 0.0300 0.0370 6.70 2/22/2010 ENER 0.161 < 0.0300 0.0380 6.10 3/25/2010 ENER 0.161 < 0.0300 0.0400 7.90 4/29/2010 ENER 0.150 < 0.0300 0.0390 7.50 5/31/2010 ENER 0.194 0.0300 0.0490 7.60 C-47 TABLE C-2 WATER QUALITY ANALYSIS FOR LYSIMETERS (cont.) M i nor Con s tituents Sample Point pH Unat Mo Se N03 Ra226 Ra228 v Th230 Name Date Lab (std. units) (mg/I) (mg/I) (mg/I) (mg/I) (pCi/I) (pCi/I) (mg/I) (pCi/I) L Y 28-1 6/30/2010 ENER 0.1 83 < 0.0300 0.0410 7.20 7/27/20 1 0 ENER 0.171 < 0.0300 0.0440 8.00 8/31/2010 ENER 0.1 87 < 0.0300 0.0470 7.50 9/30/2 010 ENER 0.1 94 < 0.0300 0.0450 7.30 10/31/20 1 0 ENER 0.191 0.0800 0.0610 11/30/2010 ENER 0.168 < 0.0300 0.0470 1/31/2011 ENER 0.149 < 0.0300 0.0550 2/25/2011 ENER 0.1 3 5 0.0500 0.0590 4/29/2011 ENER 0.132 0.0400 0.0630 6/30/2011 ENER 0.11 1 < 0.0300 0.0670 7/15/201 1 ENER 0.1 1 2 < 0.0300 0.0570 8/31/2011 E NER 0.114 < 0.0300 0.0510 9/30/2011 ENER 0.137 < 0.0300 0.0500 10/31/201 1 ENER 0.128 < 0.0300 0.0780 11/30/2011 ENER 0.194 < 0.0300 0.0700 1 2/1 6/2011 ENER 0.193 < 0.0300 0.0540 1/3 1/20 1 2 ENER 0.198 < 0.0300 0.0 7 50 2/29/2012 ENER 0.210 < 0.0300 0.0650 4/30/20 1 2 ENER 0.200 < 0.0300 0.0560 5/31/20 1 2 ENER 0.206 < 0.0300 0.0590 6/30/2012 ENER 0.200 < 0.0300 0.0530 7/27/2012 ENER 0.202 < 0.0300 0.0500 8/31/2012 ENER 0.198 < 0.0300 0.0560 9/28/2012 ENER 0.206 < 0.0300 0.0490 10/3112012 ENER 0.201 < 0.0300 0.0560 11/28/2012 ENER 0.212 < 0.0300 0.0460 12/30/2012 ENER 0.195 < 0.0300 0.0430 1/31/2013 ENER 0.200 < 0.0300 0.0460 2/22/2013 ENER 0.203 < 0.0300 0.0460 2 1.0 C-48 -------------------

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TABLE C-2 WATER QUALITY ANALYSIS FOR LYSIMETERS (cont.) Minor Constituents Sample Point pH Unat Mo Se N03 Ra226 Ra228 v Th230 Name Date Lab (std. units) (mg/I) (mg/I) (mg/I) (mg/I) (pCi/I) (pCi/I) (mg/I) (pCi/I) LY28-1 3/26/2013 HMC 0.196 < 0.0300 0.0430 21.0 4/30/2013 ENER 0.188 0.0600 0.0380 9/17/2013 ENER 0.153 < 0.0300 0.0440 21.0 12/12/2013 ENER 0.131 < 0.0300 0.0340 21.0 3/28/2014 ENER 0.107 < 0.0300 0.0410 21.0 6/27/2014 ENER 0.0418 < 0.0300 0.0410 19.0 12/23/2014 ENER 0.0875 < 0.0300 0.0440 3/31/2015 ENER 0.0642 < 0.0300 0.0460 23.0 6/30/2015 ENER 0.0642 < 0.0300 0.0450 22.0 9/30/2015 ENER 0.0845 < 0.0300 0.0480 14.2 11/11/2015 ENER 0.0808 < 0.0300 0.0490 15.0 LY28-1M 10/16/2009 ENER 0.0009 0.160 0.0070 1.40 LY28-2 10/16/2009 ENER 0.0031 0.0500 0.0140 1.10 10/31/2011 ENER 0.415 0.180 0.0760 11/30/2011 ENER 0.770 0.0400 0.0430 12/16/2011 ENER 0.932 0.0600 0.0190 1/31/2012 ENER 0.884 0.0300 0.0310 2/29/2012 ENER 0.762 < 0.0300 0.0470 4/30/2012 ENER 0.641 < 0.0300 0.0470 5/31/2012 ENER 0.572 < 0.0300 0.0480 6/30/2012 ENER 0.533 < 0.0300 0.0480 7/27/2012 ENER 0.432 < 0.0300 0.0510 8/31/2012 ENER 0.867 < 0.0300 0.0510 9/28/2012 ENER 0.814 < 0.0300 0.0490 10/31/2012 ENER 0.624 < 0.0300 0.0530 11 /28/2012 ENER 0.521 < 0.0300 0.0560 12/30/2012 ENER 0.418 < 0.0300 0.0600 1/31/2013 ENER 0.411 < 0.0300 0.0660 C-49 TABLE C-2 WATER QUALITY ANALYSIS FOR LYSIMETERS (cont.) Minor Const i tuents Sample Point pH Unat Mo Se N03 Ra226 Ra228 v Th230 Name Date Lab (std. units) (mg/I) (mg/I) (mg/I) (mg/I) (pCi/I) (pCi/I) (mg/I) (pCi/I) LY2 8-2 2/22/2013 ENER 0.374 < 0.0300 0.0750 21.0 3/26/2013 HMC 0.328 < 0.0300 0.0770 22.0 4/30/2013 ENER 0.283 0.0600 0.0740 9/1 7/20 1 3 ENER 0.190 < 0.0300 0.0960 32.0 12/12/2013 ENER 0.136 < 0.0300 0.0870 30.0 3/28/2014 ENER 0.116 < 0.0300 0.0920 26.0 6/27/2014 ENER 0.249 < 0.0300 0.110 28.0 9/30/2014 ENER 0.110 < 0.0300 0.1 08 12/23/2014 ENER 0.0619 < 0.0300 0.1 1 2 3/31/2015 ENER 0.0483 < 0.0300 0.103 31.0 6/30/2015 ENER 0.0706 < 0.0300 0.107 32.0 9/30/2015 ENER 0.560 < 0.0300 0.170 < 0.100 11/11/2015 ENER 0.406 < 0.0300 0.11 1 10.00 LY28-2M 10/16/2009 ENER 0.0044 0.160 0.0110 1.80 11 /13/2009 ENER 8.15 0.0327 0.120 < 0.0050 2.30 12/18/2009 ENER 7.73 0.0567 0.100 < 0.0050 5.90 12/30/2009 ENER 7.87 0.0641 0.0900 < 0.0050 6.30 1/31/2010 ENER 0.0489 0.0900 < 0.0050 6.40 2/22/2010 ENER 0.0558 0.0900 0.0060 7.10 3/25/2010 ENER 0.0581 0.100 0.0070 7.40 4/29/2010 ENER 0.0552 0.0800 0.0060 7.60 5/31/2010 ENER 0.0619 0.110 0.0090 8.70 6/30/2010 ENER 0.01 1 7 < 0.0300 < 0.0050 9.00 7/27/2010 ENER 0.0502 0.0900 0.0080 10.00 8/3 1/2010 ENER 0.0504 0.0800 0.0080 9.7 0 9/30/2010 ENER 0.0534 0.100 0.0060 9.70 10/31/2010 ENER 0.0475 0.140 0.0090 11130/2010 ENER 0.0396 0.100 0.0090 1/31/2011 ENER 0.0480 0.100 0.0110 c ------------------

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TABLE C-2 WATE R QUALITY ANAL Y SIS FOR LYSIME TE RS (cont.) Minor Constituents Sample Point pH Unat Mo Se N03 Ra226 Ra228 v Th230 Name Date Lab (std. units) (mg/I) (mg/I) (mg/I) (mg/I) (pCi/I) (pCi/I) (mg/I) (pCi/I) LY28-2M 2/25/2011 ENER 0.0433 0.150 0.0130 6/30/2011 ENER 0.0368 0.130 0.0130 7/15/2011 ENER 0.0344 0.130 0.0080 8/31/2011 ENER 0.340 0.0400 0.150 9/30/2011 ENER 0.369 0.0500 0.133 10/31/2011 ENER 0.367 0.0600 0.153 11 /30/2011 E NER 0.334 0.0800 0.157 12/16/2011 ENER 0.263 0.0800 0.108 1/31/2012 ENER 0.222 0.0900 0.103 2/29/2012 ENER 0.199 0.0900 0.0840 4/30/2 0 12 ENER 0.153 0.0900 0.0720 5/31/2012 ENER 0.100 0.0900 0.0550 6/30/2012 ENER 0.0659 0.100 0.0370 7/27/2012 ENER 0.0512 0.100 0.0220 8/31/2012 ENER 0.444 0.260 0.109 9/28/2012 ENER 0.313 0.280 0.122 10/31/2012 ENER 0.346 0.230 0.150 11/28/2012 ENER 0.368 0.160 0.148 12/30/2012 ENER 0.334 0.180 0.155 1/31/2013 ENER 0.389 0.160 0.161 2/22/2013 ENER 0.382 0.150 0.158 54.0 3/26/2013 HMC 0.418 0.120 0.132 45.0 4/30/2013 ENER 0.401 0.110 0.124 9/17/2013 ENER 0.341 0.110 0.134 45.0 12/12/2013 ENER 0.338 0.110 0.0990 38.0 3/28/2014 ENER 0.330 0.100 0.110 32.0 LY28-3 10/16/2009 ENER 0.0875 0.100 0.0230 21.0 11 /13/2009 EN ER 8.11 0.487 0.100 0.0500 43.5 12/18/2009 ENER 7.87 0.553 < 0.0300 0.0420 53.7 c -51 TABLE C-2 WATER QUALITY ANALYSIS FOR LYSIMETERS (cont.) Minor Constituents S am pl e Po i nt pH U na t Mo Se N0 3 R a 226 Ra228 v T h230 Na me Dat e Lab (st d. un i t s) (mg/I) (mg/I) (mg/I) (mg/I) (p Ci/I) (pCi/I) (m g/I) (pCi/I) --LY28-3 12/30/2009 ENER 7.90 0.628 < 0.0300 0.0480 55.3 1131/2010 ENER ---0.694 < 0.0300 0.0490 60.0 2/22/2010 ENER ---0.758 < 0.0300 0.0520 63.7 3/25/2010 ENER ---0.707 < 0.0300 0.0450 58.9 4/29/2010 E N ER ---0.710 0.0500 0.05 80 52.0 5/31/2 010 ENER ---0.9 71 0.110 0.0940 54.0 6/30/2 01 0 ENER ---0.973 0.0 4 0 0 0.0 9 10 62.0 712712010 ENER ---0.7 8 1 < 0.0300 0.1 0 5 72.0 8/31/2 0 10 ENER ---0.8 0 9 < 0.0300 0.167 74.0 10/31/20 11 ENER ---0.0790 0.0500 0.0 15 0 11 /30/2 0 11 ENER ---0.5 87 0.0400 0.043 0 12/16/2011 ENER ---0.677 0.0400 0.0440 1131/2 012 ENER ---0.796 0.0500 0.0 8 80 2/29/2 01 2 ENER ---0.8 70 0.0600 0.0 7 30 4/30/2012 ENER ---0.8 64 0.0600 0.0840 5/31/2012 ENER ---0.929 0.0500 0.09 2 0 6/3 0/2 012 E N ER ---1.0 3 0.0 500 0.10 4 7/2 7/20 1 2 E N E R ---1.22 0.040 0 0.1 17 8/3 1/20 1 2 E N ER ---1.50 < 0.0 30 0 0.12 6 9/28/2012 ENER ---1.67 < 0.0300 0.1 44 10/31/2012 ENER ---1.55 < 0.0300 0.148 11/28/2012 ENER ---1.57 < 0.0300 0.0 580 1/31/2 013 ENER ---1.59 < 0.0300 0.0780 212212013 ENER --1.49 < 0.0300 0.0850 151 3/26/2013 HMC ---1.49 < 0.0300 0.0740 147 4/30/2 013 ENER ---1.4 2 0.0400 0.070 0 9/17/2 013 ENER ---1.0 1 0.0400 0.08 10 156 12/1 2/2 0 13 E N ER ---0.855 0.0 5 0 0 0.0 73 0 156 12/3 0/2013 ENER ---1.33 < 0.03 0 0 0.065 0 c ------------------

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TABLE C-2 WATER QUALITY ANALYSIS FOR LYSIMETERS (cont.) Minor Constituents Sample Point pH Unat Mo Se N03 Ra226 Ra228 v Th230 Name Date Lab (std. units) (mg/I) (mg/I) (mg/I) (mg/I) (pCi/I) (pCi/I) (mg/I) (pCi/I) LY28-3 3/28/2014 ENER 0.718 0.0500 0.08 1 0 160 6/27/2014 ENER 0.620 0.0600 0.0850 162 9/30/2014 ENER 0.696 0.0500 0.0800 12/23/2014 ENER 0.559 0.0600 0.0930 3/31/2015 ENER 0.437 0.0500 0.0990 1 7 5 6/30/2015 ENER 0.447 0.0500 0.100 177 9/30/2015 ENER 0.548 0.0500 0.0920 154 11/1 1/2015 ENER 0.439 0.0500 0.0870 154 LY34-1 10/16/2009 ENER 0.0837 0.0800 0.0090 2.80 1 2/30/2009 ENER 7.80 0.375 < 0.0300 0.0540 1 0.1 2/22/2010 ENER 0.368 0.0400 0.0470 11.7 3/25/2010 ENER 0.312 < 0.0300 0.0450 1 3.7 4/29/2010 ENER 0.279 < 0.0300 0.0460 1 4.5 5/31/2010 ENER 0.324 0.0500 0.0610 15.2 6/30/20 1 0 ENER 0.332 0.0400 0.0470 14.8 7/27/2010 ENER 0.272 0.0400 0.0450 1 5.0 8/31/2010 ENER 0.231 < 0.0300 0.0490 15.9 9/30/2010 ENER 0.317 < 0.0300 0.0610 30.0 10/31/2010 ENER 0.310 < 0.0300 0.0680 11/30/2010 ENER 0.339 < 0.0300 0.0720 1/31/2011 ENER 0.340 < 0.0300 0.0610 2/25/2011 ENER 0.362 < 0.0300 0.0780 3/31/2011 ENER 0.367 < 0.0300 0.0670 4/29/2011 ENER 0.401 0.0500 0.0940 6/30/2011 ENER 0.328 < 0.0300 0.0960 7/15/2011 ENER 0.345 0.0400 0.0880 8/31/2011 ENER 0.328 0.0600 0.0720 9/30/2011 ENER 0.292 0.0600 0.0680 10/31/201 1 ENER 0.284 0.0700 0.0720 c -53 TABLE C-2 WATER QUALITY ANALYSIS FOR LYSIMETERS (cont.) Min o r Constituents S a mpl e Po int pH Una t Mo Se N0 3 Ra2 2 6 Ra228 v T h 23 0 N a m e Date Lab (std. u nits) (mg/I) (mg/I) (mg/I) (mg/I) (pC i/I) (p C i/I) (mg/I) (pC i/I) LY34-1 11/30/2011 ENER 0.279 0.0700 0.0800 12/16/2 011 ENER 0.2 67 0.0800 0.0620 2/29/2012 ENER 0.285 0.0700 0.0760 4/30/2012 ENER 0.265 0.0600 0.0780 5/31/2 012 E N ER 0.279 0.0600 0.0730 6/30/2 0 12 ENER 0.2 7 1 0.06 0 0 0.06 60 7/2 7/2 0 12 ENER 0.178 < 0.03 00 0.0 56 0 8/31/2 0 12 ENER 0.309 < 0.0300 0.0870 9/28/20 12 ENER 0.377 < 0.0300 0.0 5 7 0 1 0/3 1/20 1 2 ENER 0.4 32 < 0.0300 0.05 4 0 11/2 8/2012 ENER 0.432 < 0.0300 0.0490 12/30/2012 ENER 0.420 < 0.0300 0.0500 1/31/2013 ENER 0.460 < 0.0300 0.0540 2/2 2/2 013 ENER 0.4 5 6 < 0.0300 0.05 9 0 69.0 3/26/2013 HMC 0.4 45 < 0.030 0 0.0540 68.0 4/30/2013 ENER 0.446 < 0.0300 0.0500 9/17/2 0 13 E N ER 0.353 < 0.03 00 0.05 7 0 72.0 1 2/1 2/20 1 3 ENER 0.340 < 0.0 3 00 0.0 5 00 72.0 3/2 8/2 0 14 ENER 0.330 < 0.0 30 0 0.06 00 78.0 6/27/2 0 14 ENER 0.350 < 0.0300 0.0670 78.0 9/30/2014 ENER 0.323 < 0.0300 0.0720 12/2 3/20 14 ENER 0.317 < 0.030 0 0.0820 6/30/2015 ENER 0.311 < 0.0300 0.08 6 0 115 9/3 0/2 0 15 ENER 0.212 < 0.030 0 0.0830 148 LY34-2 10/16/2009 ENER 0.0067 0.140 0.0060 < 0.100 11/13/200 9 ENER 8.34 0.0695 0.110 0.0 1 50 2.40 12/18/2 00 9 ENER 7.94 0.08 71 0.080 0 0.01 90 7.50 12/3 0/2 009 E N ER 7.98 0.0 876 0.1 00 0.0 21 0 8.3 0 1/31/2 0 1 0 ENER 0.0962 0.0800 0.0300 12.5 c-54 -------------------

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TABLE C-2 WATER QUALITY ANALYSIS FOR LYSIMETERS (cont.) Minor Constituents Sample Point pH Unat Mo Se N03 Ra226 Ra228 v Th230 Name Date Lab (std. units) (mg/I) (mg/I) (mg/I) (mg/I) (pCi/I) (pCi/I) (mg/I) (pCi/I) LY34-2 2/22/2010 ENER 0.118 0.0900 0.0330 9.40 3/25/2010 ENER 0.126 0.0800 0.0350 14.0 4/29/2010 ENER 0.142 0.0800 0.0440 12.0 5/31/2010 ENER 0.192 0.110 0.0550 11.4 6/30/2010 ENER 0.222 0.120 0.0600 12.8 7/27/2010 ENER 0.202 0.100 0.0590 12.1 8/31/2010 ENER 0.104 0.0500 0.0430 8.00 9/30/2010 ENER 0.0932 0.0400 0.0370 6.20 10/31/2010 ENER 0.195 0.0600 0.0600 11/30/2010 ENER 0.406 0.0700 0.0690 1/31/2011 ENER 0.379 0.0400 0.0700 2/25/2011 ENER 0.388 0.0500 0.0850 3/31/2011 ENER 0.389 0.0400 0.0830 4/29/2011 ENER 0.394 0.0900 0.114 6/30/2011 ENER 0.311 0.0400 0.113 10/31/2011 ENER 0.0861 0.260 0.0130 11/30/2011 ENER 0.184 0.300 0.0140 12/16/2011 ENER 0.169 0.210 0.0070 1/31/2012 ENER 0.183 0.120 0.0640 2/29/2012 ENER 0.0973 0.180 0.0100 8/31/2012 ENER 0.0998 0.0400 0.0450 9/28/2012 ENER 0.0642 < 0.0300 0.0580 10/31/2012 ENER 0.0660 < 0.0300 0.0560 11/28/2012 ENER 0.0706 < 0.0300 0.0510 12/30/20 1 2 ENER 0.0664 < 0.0300 0.0500 1/31/2013 ENER 0.0722 < 0.0300 0.0490 2/22/2013 ENER 0.0737 < 0.0300 0.0530 10.7 3/26/2013 HMC 0.0737 < 0.0300 0.0500 10.00 4/30/2013 ENER 0.0758 0.0400 0.0450 C-55 TABLE C-2 WATER QUALITY ANALYSIS FOR LYSIMETERS (cont.) Minor Constituents Sample Point pH Unat Mo Se N03 Ra226 Ra228 v Th230 Name Date Lab (std. units) (mg/I) (mg/I) (mg/I) (mg/I) (pCi/I) (pCi/I) (mg/I) (pCi/I) LY34-2 9/17/2013 ENER 0.0913 < 0.0300 0.0520 12.0 12/12/2013 ENER 0.0932 0.0300 0.0440 16.0 3/28/2014 ENER 0.0993 < 0.0300 0.0540 17.1 9/30/2014 ENER 0.0877 0.0300 0.0560 12/23/2014 ENER 0.122 0.0300 0.0710 9/30/2015 ENER 0.0576 < 0.0300 0.0100 1.50 11/11/2015 ENER 0.0704 < 0.0300 0.0080 1.80 LY34-3 10/16/2009 ENER 0.0051 0.130 0.0070 1.50 11 /13/2009 ENER 8.24 0.0749 0.210 0.0250 3.60 12/18/2009 ENER 7.91 0.239 0.0800 0.0420 7.10 12/30/2009 ENER 7.92 0.349 0.0600 0.0740 7.60 1/31/2010 ENER 0.269 0.0700 0.0600 9.20 2/22/2010 ENER 0.292 0.0700 0.0630 0.500 3/25/2010 ENER 0.282 0.0700 0.0640 10.5 4/29/2010 ENER 0.243 0.0600 0.0620 9.60 5/31/2010 ENER 0.291 0.0900 0.0880 9.60 6/30/2010 ENER 0.266 0.0600 0.0700 8.80 7/27/2010 ENER 0.254 0.0600 0.0710 8.20 8/31/2010 ENER 0.250 0.0500 0.0800 6.70 9/30/2010 ENER 0.287 0.0600 0.0730 5.00 10/3112010 ENER 0.275 0.120 0.103 11/30/2010 ENER 0.279 0.0500 0.0720 1/31/2011 ENER 0.285 0.0500 0.0920 2/25/2011 ENER 0.274 0.110 0.102 3/31/2011 ENER 0.224 0.0300 0.0620 4/29/2011 ENER 0.267 0.120 0.0940 6/30/2011 ENER 0.223 < 0.0300 0.103 7/15/2011 ENER 0.229 < 0.0300 0.0990 8/31/2011 ENER 0.266 0.0300 0.0710 C-56 -------------------

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TABLE C-2 WATER QUALITY ANALYSIS FOR LYSIMETERS (cont.) Minor Constituents Sample Point pH Unat Mo Se N03 Ra226 Ra228 v Th230 Name Date Lab (std. units) (mg/I) (mg/I) (mg/I) (mg/I) (pCi/I) (pCi/I) (mg/I) (pCi/I) LY34-3 9/30/2011 ENER 0.222 0.0300 0.0660 10/31/2011 ENER 0.201 0.0400 0.122 11/30/2011 ENER 0.274 0.0400 0.112 12/16/2011 ENER 0.288 0.0300 0.0770 1/31/2012 ENER 0.268 0.0400 0.0990 2/29/2012 ENER 0.291 0.0400 0.0930 4/30/2012 ENER 0.260 0.0400 0.0900 5/31/2012 ENER 0.339 0.0400 0.121 6/30/2012 ENER 0.458 0.0600 0.174 7/27/2012 ENER 0.436 0.0600 0.177 8/31/2012 ENER 0.544 0.0800 0.280 9/28/2012 ENER 0.536 0.0700 0.248 10/31/2012 ENER 0.509 0.0600 0.223 11/28/2012 ENER 0.467 0.0300 0.172 12/30/2012 ENER 0.427 0.0500 0.169 1/31/2013 ENER 0.412 0.0500 0.142 2/22/2013 ENER 0.384 0.0400 0137 15.9 3/26/2013 HMC 0.376 0.0400 0.133 16.0 4/30/2013 ENER 0.368 < 0.0300 0.122 9/17/2013 ENER 0.416 0.0600 0.173 15.0 12/12/2013 ENER 0.396 0.0700 0.149 19.6 3/28/2014 ENER 0.353 0.0600 0.158 15.7 6/27/2014 ENER 0.414 0.0700 0.199 5.30 LY34-4 10/16/2009 ENER 0.0261 0.280 0.0050 1.40 11 /13/2009 EN ER 8.38 0.0613 0.310 0.0110 4.20 12/18/2009 ENER 8.34 0.0714 0.280 0.0130 12.4 12/30/2009 ENER 8.36 0.0671 0.230 0.0180 15.8 1/31/2010 ENER 0.0574 0.270 0.0220 22.9 8/31/2010 ENER 0.0397 0.320 0.0480 49.0 c -57 Sample Point Name LY34-4 pH TABLE C-2 WATER QUALITY ANALYSIS FOR LYSIMETERS (cont.) Minor Constituents Date Lab (std. units) Unat (mg/I) Mo (mg/I) Se (mg/I) N03 (mg/I) Ra226 (pCi/I) Ra228 (pCi/I) v (mg/I) 9/30/2010 ENER 0.0749 0.460 0.0510 53.0 c -58 Th230 (pCi/I) -------------------

I I I I I I I I I I I I I 1 1 I I I I I I I I APPENDIXD GROUND WATER SECTION 33 IRRIGATION AREA CONCENTRATION MAPS AND PLOTS APPENDIX D TABLE OF CONTENTS GROUND WATER SECTION 33 IRRIGATION AREA CONCENTRATION MAPS AND PLOTS Page Number D.O D.l D.2 D.3 D.4 D.5 D.6 D.7 D.8 D.9 D.10 D-1 D-2 D-3 D-4 GROUND WAT E R SECTION 33 ..........................................

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D-1 S UL FA T E CONCENTRATIONS

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D-2 TDS CONCENTRATIONS

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................................... D-2 CHLORID E CONCENTRATIONS

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D-3 URANIUM CONCENTRATIONS

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...................................... D-3 SEL E NIUM CONCENTRATIONS

...................................................................... D-4 MOLYBD E NUM CONC E NTRATIONS

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............. D-4 NITRATE CONC E NTRATIONS

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D-4 Ra-226+Ra-228 CONC E NTRATIONS

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....... D-5 THORIUM-230 CONC E NTRATIONS

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..................................................... D-5 FIGURES 2016 SULFATE ALL U VIAL CONCENTRATIONS IN SECTION 33 , mg/I ..... D-6 S UL FAT E CONCENTRATION FOR WELLS 551 , 647 , 649 , 650 AND 658 .... D-7 SULFATE CONCENTRATION FOR WELLS 541 , 657 , 685 , 687 AND 996 .... D-8 2016 TDS ALLUVIAL CONCENTRATIONS IN SECTION 33 , mg/I ...............

D-9 D-5 TDS CONC E NTRATION FOR W E LLS 551 , 647 , 649 , 650 AND 658 ............

D-10 D-6 TDS CONC E NTRATION FOR W E LLS 541 , 657 , 685 , 687 AND 996 ............ D-11 D-7 2016 CHLORIDE ALLUVIAL CONCENTRATIONS IN SECTION 33 , mg/I ........ . ...................................................................

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D-12 D-8 CHLORID E CONCENTRATION FOR W E LLS 551 , 647 , 6 4 9 , 650 AND 658 ........ . ....................................

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............................ D-13 D-9 CHLORIDE CONCENTRATION FOR WELLS 541 , 657 , 685 , 687 AND 996 ..................................................................................................

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D-14 D-10 2016 URANIUM ALLUVIAL CONCENTRATIONS IN SECTION 33 , mg/I... ....... . ..................................................

............................................................................ D-15 G ran ts R ecla m at i on P roject D-i L a nd Ap p licatio n Imp act Assess m e n t I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I 1* I I I I I I I TABLE OF CONTENTS GROUND WATER SECTION 33 IRRIGATION AREA CONCENTRATION MAPS AND PLOTS Page Number FIGURES (CONTINUED)

D-11 URANIUM CONCENTRATION FOR WELLS 551 , 647 , 649 , 650 AND 658 ......... . .........................................................................................

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D-16 D-12 URANIUM CONCENTRATION FOR WELLS 541 , 657 , 685, 687 AND 996 ............................

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D-17 D-13 2016 SELENIUM ALLUVIAL CONCENTRATIONS JN SECTION 33 , mg/I ........ . ............................

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D-18 D-14 SELENIUM CONCENTRATION FOR WELLS 551, 647 , 649 , 650 AND 658 ............................................

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...... D-19 D-15 SELENIUM CONCENTRATION FOR WELLS 541 , 657, 685 , 687 AND 996 ............................

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D-20 D-16 2016 MOLYBDENUM ALLUVIAL CONCENTRATIONS IN SECTION 33, mg/I ...............................

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D-21 D-17 MOLYBDENUM CONCENTRATION FOR WELLS 551, 647 , 649, 650 AND 658 .........................................................................

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....................... D-22 D-18 MOLYBDENUM CONCENTRATION FOR WELLS 541 , 657, 685 , 687 AND 996 ...............

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.......... D-23 D-19 2016 NITRATE ALLUVIAL CONCENTRATIONS IN SECTION 33 , mg/I.... D-24 D-20 NITRATE CONCENTRATION FOR WELLS 551 , 647, 649, 650 AND 658 ... D-25 D-21 NITRATE CONCENTRATION FOR WELLS 541 , 657, 685 , 687 AND 996 ... D-26 D-22 2016 Ra-226+Ra-228 ALLUVIAL CONCENTRATIONS IN SECTION 33 , pCi/ID-27 D-23 Ra-226+Ra-228 CONCENTRATION FOR WELLS 551 , 647, 649 , 650 AND 658 ........................................................................................................

................ D-28 D-24 Ra-226+Ra-228 CONCENTRATION FOR WELLS 541 , 657, 685 , 687 AND 996 .....................

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D-29 TABLE OF CONTENTS Grants Reclamation Proj ec t D-ii Land App li cation I mpact Assessment GROUND WATER SECTION 33 IRRIGATION AREA CONCENTRATION MAPS AND PLOTS Page Number FIGURES (CONTINUED) 0-25 2016 VANADIUM ALLUVIAL CONCENTRATIONS IN SECTION 33, mg/I ...... . ...........

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............................. 0-30 0-26 2016 Th-230 ALLUVIAL CONCENTRATIONS IN SECTION 33 , pCi/I ........ D-31 TABLES D-1 SECTION 33 MONITORING WELL DATA ..........................................

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D-1 Grants R e clamation Proj ec t D-ii i La nd App licat ion Impa ct A ss e s sm e nt I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I D.O Ground Water Section 33 Section 33 ha s two irrigated areas , the 150 acre center pivot and 24 acre s of flood area. The Section 33 pivot existed o v er the Rio San Jose alluvium while the Section 33 flood area e x i s t s over both San Mateo and Rio San Jose alluvium. The 24 acre flood area is typically included in the Section 34 analysis because the soil properties in the Section 33 flood area are similar to those in the Section 34 flood area. However, the ground-water e v aluation for the Section 33 flood is included in the Section 33 ground-water evaluation.

Figure D-1 show s the location of the 3 new m o nitoring well s; 551 , 553 and 554. These wells were added in 2009 to further define the ground-water concentra t ions in this area. Wells 551 , 553 , 554 , 647 , 649 , 657 and 658 are used in evaluating the ground-water concentration s adjacent to the 150 acre center pivot w hil e alluvial well 650 is used to monitor the Section 3 3 flood area (see Table D-1 for well completion information). Well 648 has not had enough water in it the last few years to collect a sample. Table D-1. Section 33 Monitoring Well Data WELL CASING WATER LEVEL MP ABOVE BASE OF BASE OF PERFORA WELL NORTH. EAST DEPTH DIAM. DEP TH ELEV. LSD MP ELEV. ALLUVIUM ALLUVIUM TIONS SAT URA TED NAME COORD. COORD. (FT*MSP) (IN) DATE (FT*MSP) (FT*MSL) (FT) (FT*MSL) (FT-LSD) (FT*MSL) (FT-LSD) THICKNESS EXISTING ALLUVIAL WELLS 541 1539831 477236 1 20 1215/2011 91 6 4 6 4.62 6555.62 A 78-118 551 1 53 6 280 4 798001 13 0 121 5/201 1 99.31 6447.99 65 4 7.3 120 6 4 33 A 90-130 18 553 1534840 480510 120 1215/2011 104.22 6443.26 6547.4 8 110 6433 A 80-120 15 554 153 484 0 479110 1 40 5 1215/20 11 105.89 6441.28 2 6 54 7.17 130 6 4 11 A 100-14 0 29 647 153 6 623 478308 140 4.5 1215/2011 105.09 6446.82 1.4 6551.91 132 6418.5 A 80-1 4 0 26.7 6 4 8 153 4 730 478343 120 4.5 1215/20 1 1 130.2 6 4 17.59 2 6 54 7.79 120 6425.8 A 80-1 20 6.3 649 1534730 479798 124 4.5 1215/2011 102.87 6 44 0.42 0.3 6543.29 115 6 4 28 A 84-1 2 4 12.5 650 1 536779 482135 1 09 4.5 8/9/20 1 1 82.74 6 4 64.37 22 6547.11 103 6441.9 A 89-1 09 21.3 657 1 537497 478392 128 1215/2011 101.03 6 4 50.78 2.2 6551.81 120 6429.6 A 87-128 17.3 658 1 5 35 9 22 478436 130 121 5/201 1 107.3 6 44 2.88 0.4 6 5 50.1 8 129 6 42 0.8 A 89-1 30 20.9 685 1539098 478170 100 4.5 1215/2011 97.3 6 45 9.27 1.7 6556.57 116 6 4 38.9 A 60-1 00 17.5 687 153 9 011 477276 102 1215/2011 95.85 6 4 60.1 1 2.2 6555.96 120 6433.8 A 62-102 23.1 996 1537621 477989 138 1215/2011 49.6 6502.92 1.7 6552.52 136 64 1 4.8 A 126-136 32.7 Gra n ts R ec l a m a ti o n P rojec t D-1 L a n d Applicati o n Im pac t Assess ment D.1 Sulfate Concentrations The sulfate concentrations for the alluvial aquifer are presented in Figure D-1 for the Section 33 area. This figure shows the locations of all of the alluvial wells in this area and the 2016 alluvial sulfate concentrations in Section 33. The 2016 contour is presented in blue which shows sulfate concentrations greater than 500 mg/I to the east of this contour. Sulfate concentration data (2016) is also posted on the figure adjacent to each of the wells. The Section 33 center pivot is located in the Rio San Jose alluvial system. The Rio San Jose alluvial system receives water from the San Mateo alluvial system in the western portion of Section 28. The Rio San Jose alluvial system typically has a concentration gradient from the west-southwest to the northeast.

The location of the 500 mg/I sulfate concentration i n 2016 was similar in Sections 32 and 33 to contours in previous years. The movement of the concentration contour line to the east varies due to the amount of natural recharge to the Rio San Jose alluvial system on the west side. The San Andres aquifer also has a direct connection with the alluvial aquifer in the southeast portion of Section 32 and therefore has caused a sink to develop in the alluvial aquifer in this area due to the movement of alluvial groundwater into the San Andres aqu i fer. This would also tend to shift the sulfate contour to the west.

Figure D-2 shows the sulfate concentrations for alluvial wells 551 , 647 , 649 , 650 and 658 compared to the Grants site standard of 1500 mg/I. The small decrease in concentrat i on in alluvial well 551 , which is located in the center of the pivot , was observed in 2015 and 2016 which is thought to show the dissipating of effects of the Section 33 irrigation on the ground water in this area. Sulfate concentration in al l uvial we l l 649 , which is on the south side of the center pivot , slightly decreased in 2016 and is likely still showing a very small effect from the irrigation. Sulfate concentrations prior to the irrigation in 2000 and during the early years of irrigations were slightly lower in wells 647 , 649 and 658 than those observed in the last nine years. Figure D-3 shows the sulfate concentrations upgradient of the Section 33 irrigation area for alluvial wells 541 , 657 , 685 , 687 and 996 compared to the Grants site standard of 1500 mg/I. This plot shows very similar sulfate concentrations in these alluvial wells to those that have been observed in the Section 33 irrigation area , indicating that the water entering the Section 33 area should not change these sulfate concentrations.

This monitoring is thought to show a very small effect in sulfate concentrations on the Section 33 ground water due to the Section 33 irrigation.

The very small increase in sulfate concentration could also eas i ly be from the s l ightly higher sulfate concentrations that exist to the northwest in the Rio San Jose alluvial system , or also the shifting of higher concentrations to the west in Section 33. The sulfate concentration in well 551 was slightly higher than most of the Section 33 monitoring wells and likely shows sulfate increase due to the Section 33 irrigation. Fairly s teady concentrations had been observed in alluvial well 650 until an increase was observed in 2010. Well 650 is located on the southwest side of Section 33 flood area. This small increase could possibly be due to the Section 33 flood irrigation. Gran ts R ec lamation Pro je ct D-2 L a n d Ap p lica tion Imp act Assess m e n t I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I D.2 TDS Concentration s TDS concentrations have been monitored in Section 3 3 since 1997 when the original monitoring wells were drilled. Figure D-4 presents the TDS concentrations for 2016. Thi s figure shows the 2016 data and these values are listed adjacent to the wells. The 1 , 000 mg/I contour for TDS in 2016 is generally in the area of its location for previous years. The TDS concentrations to the north of Section 33 irrigation in the Rio San Jose alluvial system are similar to those in Section 33 center pivot area. Thi s indicates that the area to the north should not increase the alluvial TDS concentrations in the Section 33 center pivot area as this water moves to the south. Figure D-5 pre s ents the TDS concentrations for well s 551 , 647 , 649 , 650 and 658 with the TDS site standard of 2734 mg/I. This data shows that , in general , the TDS concentrations for well 649 gradually decreased in 2016 , but there had been an overall increase in well 649 over the previous nine years. T his very small increase could possibly be showing an effect on TDS in the alluvial aquifer from the Section 33 center pivot , along with the slightly higher concentrations observed in well 5 51 prior to 2015. Therefore , the small effect on the TDS concentrations in the alluvial ground water in Section 33 likely is defined by the slightly larger concentrations in wells 551 and 649. The slightly smaller TDS values in well 551 in 2015 and 2016 and the smaller TDS in well 649 in 2016 show that the small increase due to the Section 33 irrigation will be dissipated in the very near future. TDS concentrations were fairly steady in well 650 prior to a small increase since 2010 which could be due to this flood irrigation.

The TDS concentrations upgradient of the Section 33 irrigation area for alluvial wells 541 , 657 , 685 , 687 and 996 are presented in Figure D-6. This plot shows ver y similar TDS concentrations in these alluvial wells to those that have been observed in the Section 33 irrigation area. D.3 Chloride Concentrations The alluvial chloride concentrations are presented in Figure D-7 for 2016. This map shows that the 2016 chloride concentrations of>lOO mg/I extend to the south ofthe southern edge ofthe *center pivot. The chloride concentrations above 100 mg/I contour in 2016 are thought to be from the higher concentrations upgradient to the northwest of the pivot in the alluvial aquifer , and that only the chloride concentrations from wells 553 and 649 still show a small effect from the Section 33 irrigation. F igure D-8 presents the chloride concentrations for the monitoring wells in the Section 33 area compared to the site standard of 250 mg/I. This figure shows fairl y steady chloride concentrations but does show a small increase in chloride concentrations for the last nine years in well 649. A small decrease was observed in 2015 and 2016 in well 551 which is likely due to the ceasing of the Section 33 irrigation. The 2016 chloride concentrations in well 649 indicates the effects from the Section 33 irrigation will be over in this ground water in the very near future. The higher chloride concentrations in well 551 likely define the small increase due to Section 33 center pivot irrigation.

The chloride concentrations in alluvial well 650 could possibly be s howing the effects on the ground water from the Section 33 flood irrigation but the value is well within natural range of this constituent.

Gra n ts R e clam a t ion P rojec t D-3 La nd A pplic a tion Imp act Assess m e nt Figure D-9 shows the chloride concentrations upgradient of the Section 33 irrigation area for alluvial wells 541 , 657 , 685 , 687 and 996 compared to the Grants site standard of250 mg/I. This plot shows very similar chloride concentrations in these alluvial wells to those that have been observed in the Section 33 irrigation area. D.4 Uranium Concentrations Uranium is an important parameter because it is the main hazardous consti t uent of concern i n the irrigation water. Figure D-10 presents the 2016 uranium concentrations fo r the alluvial aqu i fer in the Section 33 area. The blue contours show that the uranium concentrations of 0.05 mg/I extended down to the western edge of Section 33 center pivot in 2016. A d ecrease in the area of significant uranium concentrations has occurred in the Section 33 with time due to the restoration efforts upgradient of this area. Figure D-11 presents the uranium concentrations versus time for the Section 33 alluvial wells and the alluvial site standard of 0.16 mg/I. This plot shows that the uranium concentrations for the ten years during the operation of the Section 33 center pivot and seven y ear s after ceasing irrigation have been relatively steady. Uranium concentrations in well 647 declined by the start of the irrigation program to concentrations observed recently.

The observed uranium concentrations do not indicate any measurable effect on the ground-water q uality that is attributable to the Section 33 center pivot irrigation.

The small and steady concentrations from alluvial well 650 do not indicate any uranium effects from the Section 33 flood system. The uranium concentrations up gradient of the Section 33 irrigation area for alluvial wells 5 4 1 , 657 , 685 , 687 and 996 are presented in Figure D-12. Recent uranium concentrations in these upgradient wells are slightl y higher than those that have been observed in t h e Section 33 irrigation area but are not expected to significantly change the uranium concentrations in Section 33. D.5 Selenium Concentrations Figure D-13 presents the 2016 se l enium concentrations for the alluvial aqu i fer in the Section 33 area. No iso-concentration contours exist on this figure for 2016 concentrations because the selenium concentrations are all very low. The 2016 concentrations are pos t ed by each well. Figure D-14 presents the selenium concentrations for the Section 33 monitoring wells. Selenium concentrations in the Section 33 monitoring wells have varied from 0.02 to 0.05 over this period of time with no consistent trends. These selenium concentration changes a r e not significant enough to determine if the Section 33 irrigation has had any effect on the selenium concentrations in the alluvial aquifer. Selenium concentrations have been steady in well 650. Figure D-15 shows the selenium concentrations upgradient of the Section 33 irrigation area for alluvial wells 541 , 657 , 685 , 687 and 996 compared to the Grants site standard of 0.32 mg/I. This plot shows very similar and small selenium concentrations in these alluvial wells to those that have been observed in the Section 33 irrigation area. Gra nt s R ecl am a tion Pro ject D-4 L a nd A ppli c ation Imp act A ssess m e nt I I I I I I I I I 1 1 I I I I I I I I I I I I I I I I I I I I I I I I I I I I 0.6 Molybdenum Concentrations The molybdenum concentrations for 2016 are presented in Figure 0-16 with all of these concentrations less than the detection limit for the molybdenum , which is 0.03 mg/I. This figure and Figures D-17 and D-18 , which shows the molybdenum concentrations with time and the site standard of 0.1 mg/I, shows that no effect on molybdenum concentrations has been observed from the Section 33 irrigation or upgradient of this area. D.7 Nitrate Concentrations The nitrate concentrations for 2016 are presented in Figure D-19. The highest measured concentration in 2016 in this area was 6.2 mg/I from well 650. Figures D-20 and D-21 present the nitrate concentrations (site standard of 12 mg/I) with time and shows that the nitrate concentrations generally have been fairly steady except for a gradual decline in nitrate concentrations in well 647. These nitrate concentrations do not indicate any observable impacts on alluvial nitrate concentrations as a result of the Section 33 irrigation.

0.8 Radium-226 plus Radium-228 The radium-226+radium-228 concentrations for 2016 are presented in Figure D-22. The highest measured radium concentration in 2016 in this area was 4.2 pCi/I from well 649 and this value is higher than representative values from this area. Figures D-23 and D-24 present the radium concentrations with time and shows that the radium levels vary significantly which is thought to be due to laboratory variations.

These radium concentrations do not indicate any observable impacts on alluvial aquifer as a result of the Section 33 irrigation which is expected because the irrigation water did not contain a significant level ofradium.

D.9 Vanadium Concentrations The vanadium concentrations for 2016 are presented in Figure D-25 with all of these concentrations less than the detection limit for the vanadium, which is 0.01 mg/I. This figure shows that no effect on vanadium concentrations have been observed from the Section 33 irrigation which is expected since the irrigation water did not contain vanadium.

0.10 Thorium-230 Concentrations The thorium-230 concentrations for 2016 are presented in Figure D-26. The highest measured thorium-230 concentration in 2016 in this area was 0.08 pCi/I from wells 553 and 649. These thorium-230 concentrations do not indicate any observable impacts on alluvial aquifer as a result of the Section 33 irrigation which is expected because the irrigation water did not contain a significant level of thorium. Gra nts Reclamation Pr oje ct 0-5 L a nd Application Imp act A ssess m e nt SCALE* l' = 1000' C\PRDJECTS\2017-06\

160CICW.-1RRIGA Tlc:tl DATE* 8/30/2017

....

635 *

• q,; 591 150 ----8 33

\1 \\ / \ \\ .. , \'\____ \ 10ot ....

• 661 * \ 795 963 ----.

FIGURE D-1. 2016 SULFATE CENTE PIVOT AND FLOOD IRRIGATION

/.--LEGEND LY1 EXISTING LYSDIETER LOCATION lb":>+) ALLUVIAL WELL 0.05 20111 S04 CONC., me/I. -500 CONTOUR AND IAllBL ALLUVIAL AQUIFER BOUNDARY ALLUVIAL CONCENTRATIONS IN SECTION 33, mg/L HOMESTAKE MINING COMPAN Y GRANTS, NEIJ MEXICO D-6 I I I I I I I I I I I I I I I I I I I

---

1500 Legend

• 5 5 1

• 647

• 649

• 650

• 658 Site Standard 1500 1000 ...._ O'I E ... w 0 -' ::::J CJ) 500 1995 1997 1999 2001 2003 2005 2007 2009 2011 2013 2015 2017 FIGURE D-2. SULFATE CONCENTRATIONS FOR WELLS 551 , 647 , 649 , 650 , AND 658.

1500 1000 ..._ C'I E ... LU 0 I _J 00 :::> Cf) 500 L egend

• 541

• 657

• 685

• 68 7

• 996 S i te S t a n da r d 15 00 1995 1997 1999 2001 2003 2005 2007 2009 2011 2013 2015 2017 FIGURE D-3. SULFATE CONCENTRATIONS FOR WELLS 541, 657 I 685, 687 AND 996. -------------------

I I I I I I I I I I I I I I I I SCALE* 1 * = 1000' D\PRC.JECTS'\2017--06\

1 600QAL-IRRIGATl[Jj DATE* 9/14/2017

'\.

1480 *

• q; 1540 / J * \ 150 1550 FIGURE D-4. 2016 TDS -28 \1 \\ '" \\ \ ,, \\____ 1940"" \ CENTE PIVOT AND FLOOD IRRIGA TIDN LEGEND LY1 EXISTING LYSDIBTER LOCATION ALLUVIAL WELL 0.05 20111 TDS CONC., mc/L -500 CONTOUR AND LABEL ALLUVIAL AQUIFER BOUNDARY ALLUVIAL CONCENTRATIONS IN SECTION 33, mg/L HOMESTAKE MINING COMPANY GRANTS, NEIJ MEXICO D-9 3000 2500 ...._ O'l E ' (J') 2000 0 -_J 0 (J') 0 w 1500 > 9 _J 0 0 (J') (J') -0 _J 1000 500 Legend

• 551 A 647

• 649

• 650

• 658 Site Standard 2734 1995 1997 1999 2001 2003 2005 2007 2009 2011 2013 2015 2017 FIGURE D-5. TDS CONCENTRATIONS FOR WELLS 551, 647, 649, 650, AND 658. -------------------

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3000 2500 ...........

O'I E ... CJ) 2000 0 1-4 _J 0 CJ) 0 w 1500 > 9 _J 0 CJ) CJ) 1-4 0 _J 1000 500 Legend

• 541

• 657

• 685

• 687

• 996 Site Standard 2734 1995 1997 1999 2001 2003 2005 2007 2009 2011 2013 2015 2017 FIGURE D-6. TDS CONCENTRATIONS FOR WELLS 541, 657, 685, 687 AND 996.

SCALE* 1' = 1000' D\PROJECTS\2017-06\

DATE* 9/1412017

'O 0 143. / J * \ 32 &33 5 4 120 -LEGEND 28 33 LYl EXISTING LYSDIETER LOCATION ALLUVIAL WELL 0.05 2015 CL CONC., mc/L -500 CONTOUR AND LABEL ALLUVIAL AQUIFER BOUNDARY FIGURE D-7. 2016 CHLORIDE ALLUVIAL CONCENTRATIONS IN SECTION 33, mg/L HOMESTAKE MINING COMPANY GRANTS, NE'W MEXICO D-12 I I I I I I I I I I I I I I I I I

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500 400 ..........

O'I 300 E ... Ll.J 0 1--1 C? O'.'. 0 w _J I 200 u 100 Legend

• 551 .. 647

• 649

• 650

• 658 Site Standa r d 250 1995 1997 1999 2001 2003 2005 2007 2009 2011 2013 2015 2017 F IGU R E D-8. CHLORIDE CONCENTRATION S FOR WELLS 5 5 1 , 647 , 649 , 6 5 0 , A ND 6 58.

500 400 ...._ O'I 300 E ... w 0 1----4 9 0::: 0 _J I 200 u 100 Legend

• 541 A 657

• 685

• 687

• 996 Site Standard 250 1995 1997 1999 2001 2003 2005 2007 2009 2011 2013 2015 2017 FIGURE D-9. CHLORIDE CONCENTRATIONS FOR WELLS 541, 657, 685, 687 AND 996. -------------------

I I I I I I I I I I I I I I I I I I I SCALE* l' = 1000' O\PRO JE CTS\2017-06\

l600QAL -IRRIGA DATE* 9/14/2017

.05 150 AC 0.03 * \ 5 4 ---' \\ ' 28 33 \\ ' \\ \ .... \\ __ _ o.o 3 \ CENTE PIVOT AND FLOOD IRRIGATION LEGEND LY1 EXISTING LYSDIETER LOCATION ALLUVIAL WELL 0.05 20111 URANIUM CONC., mc/L -500 CONTOUR AND IABEL ALLUVIAL AQUIFER BOUNDARY FIGURE D-10. 2016 URANWM ALLUVIAL CONCENTRATIONS IN SECTION 33 , mg/L HOMESTAKE MINING COMPANY GRANTS , NEIJ MEXICO D-1 5 0.5 0.4 ....._ O"I 0.3 E ... :E: :::> 1--1 9 z "' ::::> 0.2 Legend

• 551 64 7

• 649

• 650

• 6 5 8 S i te S t a n dard 0.16 1995 1997 1999 2001 2003 2005 2007 2009 2011 2013 2015 2017 FIGURE D-11. URANIUM CONCENTRATIONS FOR WELLS 551, 647, 649, 650, AND 658. -------------------

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0.5 0.4 ::::::::.

CJ) 0.3 E ... :E :::> ....... CJ z I -.J :::> 0.2 0.1 Legend

• 541 A 657

• 685

• 687

• 996 Site Standard 0.16 1995 1997 1999 2001 2003 2005 2007 2009 2011 2013 2015 2017 FIGURE D-12. URANIUM CONCENTRATIONS FOR WELLS 541, 657, 685, 687 AND 996 SCALE* 1' = 1000' O'\PRIJ..CCTS\2017-<16' 1600ll.llL-IRRIGA TICN DATE* 9/14/2017

..... (:)'t>i.

• 0.03 150 0.03 / J 0.03 * \ 5 4 -28 33

\ \\ \ ... , \\ __ _ 0.04 ., .. -:c-,-1 \ CENTE PIVOT AND FLOOD IRRIGATION

.__..... / LEGEND LY1 EXISTING LYSlllETBR LOCATION t>"'.>+:.

ALLUVIAL WELL 0.05 2018 SELENJUl( CONC., me/I. -500 CONTOUR AND LUllL ALLUVIAL AQUIFER BOUNDARY FIGURE D-13. 2016 SELENIUM ALLUVIAL CONCENTRATIONS IN SECTION 33, mg/L HOMESTAKE MINING COMPANY GRANTS, NE'W MEXICO D-18 I I I I I I I I I I I I I I I I I I I

___ , _______________

_ 0.5 0.4 ...._ O'I 0.3 E ... :::> 1--1 9 z w \0 ....J w Cf) 0.2 Legend

• 551

• 647

• 649

• 650

• 658 Site Standard 0.32 1995 1997 1999 2001 2003 2005 2007 2009 2011 2013 2015 2017 FIGURE D-14. SELENIUM CONCENTRATIONS FOR WELLS 551 , 647 , 649 , 650 , AND 658.

0.5 0.4 ..._ O'I 0.3 E ... :::) -0 z .:..i w 0 _J w 0.2 (/) Legend

• 541 A 657

• 685

• 687

• 996 S ite S tandard 0.32 1995 1997 1999 2001 2003 2005 2007 2009 2011 2013 2015 2017 FIGURE D-15. SELENIUM CONCENTRATIONS FOR WELLS 541, 657, 685, 687 AND 996. -------------------

I I I I I I I I I I I I I I I I I I I SCALE* 1' = 1000' D\PRDJECTS\2017-()6\

DATE* 9/14/2017

.....

<0.03 <0.03

• co --' \1 ' 28 33 / \ \\ ' \\ ...... \\___

• q) \ 5 4 <0.03 <0.03 /

/ <0.03 ----. :...-----CENTE PIVOT FLOOD IRRIGATION LEGEND LY1 EXISTING LYSDlETER LOCATION q,":>f:J ALLUVIAL WELL 0.05 20111 KOLYBDBNUK CONC., mc/L -500 CONTOUR AND LABEL FIGURE D-16. 2016 MOLYBDENUM AIJ.UVIAL CONCENTRATIONS IN SECTION 33, mg/L D-21 ALLUVIAL AQUIFER BOUNDARY HOMESTAKE MINING COMPANY GR ANTS , NE'w' MEX IC O 0.5 0.4 -.... 01 E 0.3 ... ::> z w 0 0 t!.J co N >-_J 0.2 0 Legend

• 551 A 647

• 649

• 650

• 658 S i te Sta n da r d 0.1 **** 1995 1997 1999 2001 2003 2005 2007 2009 2011 2013 2015 2017 FIGURE D-17. MOLYBDENUM CONCENTRATIONS FOR WELLS 551, 647, 649, 650, AND 658. -------------------

---

• ------0.5 0.4 '-O'l E 0.3 ... :::> z w 0 0 r!..i ca VJ 0.2 0 Legend

• 541 657

• 685

• 687

• 996 Site Standard 0.1 1995 1997 1999 2001 2003 2005 2007 2009 2011 2013 2015 2017 FIGURE D-18. MOLYBDENUM CONCENTRATIONS FOR WELLS 541, 657, 685, 687 AND 996.

SCALE* l' = 1000' Co\PROJECTS\2017-<16

\ 160CIQAL-IRRIGATIC>>I DATE* 9/14/2017 I I \ 32 33 5 4 150 3.4 FIGURE D-19. 2016 NITRATE -28 33 I \\ \\ \ .... \\ __ _ 6 \ CENTE PIVOT AND FLOOD IRRIGATION

..........-

/ LEGEND LY1 EXISTING LYSDIETER LOCATION q,0;,f:. ALLUVIAL WELL 0.05 2011S N03 CONC., me/I. -500 CONTOUR AND UBBL ALLUVIAL AQUIFER BOUNDARY ALLUVIAL CONCENTRATIONS IN SECTION 33, mg/L HOME STAKE MINING COMPANY GRAN T S, NE'W MEXICO D-24 I I I I I I I I I i I I I I I I I I I I

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30 20 --O'l E ... w I-0 t!..i I-'-" 1--1 z 10 Legend

• 551

• 647

• 649

• 650

• 658 Site Standard 12 1995 1997 1999 2001 2003 2005 2007 2009 2011 2013 2015 2017 FIGURE D-20. NITRATE CONCENTRATIONS FOR WELLS 551, 647, 649, 650 AND 658.

30 20 ...._ O'I E ... w 0 i!.l I-°' 1--1 z 10 Legend

• 541 ... 657

• 685

• 687

• 996 S i te S t a n da r d 12 1995 1997 1999 2001 2003 2005 2007 2009 2011 2013 2015 201 7 FIGURE D-21. NITRATE CONCENTRATIONS FOR WELLS 541, 657, 685, 687 AND 996. -------------------

I I 1 I I I I I I I I I I I I I I SCALE* 1 * = 1000' O\PROJECTS\2017-06\

DATE* 9/14/2017 I ! \ 32 33 5 4 2.6 -28 33

\1 ', \\ ' I '-I '-\\ \ .. , \'\__ \ 0. 7 ""

CENTE PIVOT AND FLOOD IRRIGATION LEGEND LY1 EXISTING LYSIKETER LOCATION 'b°-'t;, ALLUVIAL WELL 0.05 2016 Ra-226+Ra-228 CONC., pCi/L -500 CONTOUR AND LABEL ALLUVIAL AQUIFER BOUNDARY FIGURE D-22. 2016 Ra-226+Ra-228 ALLUVIAL CONCENTRATIONS IN SECTION 33, pCi/L HOMESTAKE MINING COMPANY GRANTS, NEW' MEXICO D-27

..._ CJ) E .... 00 N N I ro 0::: 0 + I N \.0 00 N N I ro 0::: 10 8 6 4 Legend

• 551 -* 647

• 649

• 650

• 658 Site Standard 5 1995 1997 1999 2001 2003 2005 2007 2009 2011 2013 2015 2017 FIGURE D-23. Ra-226+Ra-228 CONCENTRATIONS FOR WELLS 551, 647, 649, 650, AND 658. -------------------

---

10 8 ::::::::..

O"I E ... 6 00 N N I ro 0:: Cl + t!J "° '° N 4 N I ro 0:: 2 Legend 541 .--657

• 685

• 687

• 996 Site Standard 5 * -1995 1997 1999 2001 2003 2005 2007 2009 2011 2013 2015 2017 FIGURE D-24. Ra-226+Ra-228 CONCENTRATIONS FOR WELLS 541, 657, 685, 687 AND 996.

SCALE* 1 * = 1000' D'\PRll.JECTS\2017-<16

\ 1600CW.-IRRIGATIC>>I DATE* 9/1412017 I I \ 32 33 5 4 150 ..... ';; * <0.01 --\\ \\ " 28 33 \ \\ \\___ <0.01 "<;

\ CENTE PIVOT AND FLOOD IRRIGATION LEGEND LY1 mSTING LYSIMETER LOCATION !!>f;) t> 0.05 -500 ALLUVIAL WELL 20UI Vanadium CONC., mc/L CONTOUR AND LABEL ALLUVIAL AQUIFER BOUNDARY FIGURE D-25. 2016 VANADIUM ALLUVIAL CONCENTRATIONS IN SECTION 33, mg/L HOMESTAKE MINING COMPANY GRANTS, NEIJ MEXICO D-3 0 I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I SCALE* 1' = 1000' C\PRDJ£CTS\2017-o6\

1 600ClloL-IRRIGATl(tj DATE* 9/14/2017 I I \ 32 33 5 4 -0.07 -\1 28 33 \\ \\ \ .... \\___ 0 06 ""

\ CENTE PIVOT AND FLOOD IRRIGATION

..........-

/ LEGEND LY1 EXISTING LYSIKETER LOCATION 'b0;,f3 ALLUVIAL WELL 0.05 20111 Th-230 CONC., pCi/L -500 CONTOUR AND LABEL ALLUVIAL AQUIFER BOUNDARY FIGURE D-26. 2016 Th-230 HOMESTAKE MINING COMPANY ALLUVIAL CONCENTRATIONS IN SECTION 33, pCi/L GRANTS, NE\J MEXICO D-31 APPENDIXE GROUND WATER SECTION 34 IRRIGATION AREA CONCENTRATION MAPS AND PLOTS I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I APPENDIX E TABLE OF CONTENTS GROUND WATER SECTION 34 IRRIGATION AREA CONCENTRATION MAPS AND PLOTS Page Number E.O GROUND WATER SECTION 34 .........................

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E-1 E.1 SULFATE CONCENTRATIONS

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......................... E-1 E.2 TDS CONCENTRA TIONS ..........................

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E-2 E.3 CHLORIDE CONCENTRATIONS

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................. E-2 E.4 URANIUM CONCENTRATIONS

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E-3 E.5 SELENIUM CONCENTRATIONS

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...................................................... E-3 E.6 MOLYBDENUM CONCENTRATIONS

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.................................................. E-4 E.7 NITRATE CONCENTRATIONS

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.......... E-4 E.8 Ra-226+Ra228 CONCENTRA TIONS ...................................

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... E-4 E.9 VANADIUM CONCENTRATIONS

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E-4 E.10 THORIUM-230 CONCENTRATIONS

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.............. E-4 FIGURES E-1 20 16 SULFATE ALLUVIAL CONCENTRATIONS IN SECTION 34 , mg/I .............................................

.................................................... E-5 E-2 SULFA TE CONCENTRATION FOR WELLS 555 , 556 , 557 , 844 , 845 AND 846 ... .........................................................................

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E-6 E-3 SULFATE CONCENTRATION FOR WELLS AW , F, FB , GH AND SUB3 ...... E-7 E-4 2016 TDS ALLUVIAL CONCENTRATIONS IN SECTION 34, mg/I ................ E-8 E-5 TDS CONCENTRATION FOR WELLS 555 , 556 , 557 , 844 , 845 AND 846 ....... E-9 E-6 TDS CONCENTRATION FOR WELLS AW , F, FB , GH AND SUB3 ..............

E-10 E-7 2016 CHLORIDE ALLUVIAL CONCENTRATIONS IN SECTION 34 , mg/I ........................................

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................................................ E-1 I E-8 CHLORIDE CONCENTRATION FOR WELLS 555 , 556 , 557 , 844, 845 AND 846 ......................

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.. E-12 E-9 CHLORIDE CONCENTRATION FOR WELLS AW , F , FB , GH AND SUB3 .................................

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E-13 E-10 2016 URANIUM ALLUVIAL CONCENTRATIONS IN SECTION 34 , mg/I ..................................................

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... E-14 Gra nt s Reclamati on Project E-i Land Application Impa c t Assessment TABLE OF CONTENTS GROUND WATER SECTION 34 IRRIGATION AREA CONCENTRATION MAPS AND PLOTS Page Number FIGURES (CONTINUED)

E-11 URANIUM CONCENTRATION F OR W ELL S 555 , 556 , 557 , 844 , 845 AND 846 ..................................................

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E-15 E-1 2 URANIUM CONCENTRATION F OR WELLS AW , F, FB , GH AND SUB3 ...................................................

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E-16 E-13 2016 SELENIUM ALLUVIAL CONCENTRATIONS IN SECTION 34, mg/I ...............................................

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.................................. E-17 E-14 SELENIUM CONCENTRATION F OR WELLS 555 , 556 , 557 , 844 , 845 AND 846 ...........

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E-18 E-15 SELENIUM CONCENTRATION F OR W ELLS AW, F, F B , GH AN D SUB3 .........

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... E-19 E-16 2016 MOLYBDENUM ALLUVIAL CONCENTRATIONS IN SECTION 34, mg/I ...............................................................................

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........... E-20 E-17 MOLYBDENUM CONCENTRATION FOR W ELLS 555 , 556 , 557 , 844 , 845 AND 846 ...............

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................ E-21 E-18 MOLYBD ENUM CONCENTRATION FOR WELLS AW , F , FB , GH AND SUB3 .........................................................

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... E-22 E-19 2016 NITRATE ALLUVIAL CO NCENT RATIONS IN SECTION 34, mg/l.. ... E-23 E-20 NITRAT E CONCENTRATION FOR WELLS 555 , 556 , 557 , 844 , 845 AND 846 .... ...................................................

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............................. E-24 E-21 NITRATE CONCENTRATION F OR WELLS AW , F , F B , GH AND SUB3 ..........

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... E-25 E-22 2016 Ra226+Ra228 ALLUVIAL CONCENTRATIONS IN SECTION 34, pCi/l ...... ..............................................................................

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........... E-26 E-23 Ra-226+Ra-228 CONCENTRATION FOR WELLS 555 , 556 , 557 , 844 , 845 AND 846 ............................

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E-27 E-24 Ra-226+Ra-228 CONCENTRATION FOR WELLS AW , F , F B , GH AND SUB3 ............................................................

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E-2 8 Grants Reclamation Project E-ii La nd Applicatio n Imp act Assessment I I I I I I 1 1 I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I TABLE OF CONTENTS GROUND WATER SECTION 34 IRRIGATION AREA CONCENTRATION MAPS AND PLOTS Page Number FIGURES (CONTINUED)

E-25 2016 VANADIUM ALLUVIAL CONC E NTRATIONS IN SECTION 34 , mg/I .......................................................

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............................................................. E-29 E-26 2016 Th-230 ALLUVIAL CONC E NTRATIONS IN SECTION 34 , pCi/l ......... E-30 TABLES E-1 S E CTION 34 MONITORING W E LL DATA ..........................

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.... E-1 Gra n ts R e clam a ti o n Projec t E-iii L a nd Application Im pact A ssess m e nt E.O Section 34 The Section 34 irrigation consists of 120 acres of flood irrigation in the no rt heastern portion in Section 34. This irrigation is mainly in t h e northeast quarter of Section 34 and extends slight l y into the other 3 quarters of Section 34 as shown in F i gure E-1. The Section 34 flood area all exists over the San Mateo alluvial aquifer. Established background concentrations for the a ll uvial aquifer are therefore the appropriate ground-water standards for t hi s irrigation area and are shown on the time plots. Ground-water monitoring wells 555, 556 and 557 were added in 2010. Exis ting mon i toring we ll s 844 , 845 and 846 have been used to monitor the ground-water quality in this area (see Table E-1 for well data). F i gure E-1 shows that a zero saturation zone for the alluvial aquifer exists to the sout h of the Section 34 irrigation area , and San Mateo alluvial ground-wate r in this area is forced to move toward the west. The alluvial aquifer exists in the northern portion of Sectio n 3 to the south of the Section 34 irrigation but these two areas are only connected around the zero saturation boundary to the east of Felice Acres. The range of data from the South Felice Acres alluvia l we ll s in the southwestern portion of Section 35 and the northeastern portion of Section 3 are presented in a box for each of these areas to give additiona l water quality data in t h e area. Time plots of wells AW, F, FB , GH and SUB3 are included with the time p l ot of the Section 34 monitoring wells to show changes with concentrations upgradient of the Section 34 irrigation area (see Figure 4-1 for l ocations of wells used i n the two time ser ies plots). Tab le E-1. Sect i o n 34 Mo ni toring We ll Data MP DEPTH TO ELEV.TO CAS I NG WELL CAS I NG W A TER LEVEL ABOVE BAS E OF BASE OF PERFOR-WELL N O R T H. EAST. DEPTH DIAM DEPTH ELEV. LSD MP ELEV. AL L UVIUM ALLUVIUM ATIONS SATURATED NAME CO O RD. COO RD. (FT-MP) (I N) DATE (FT-MP) (FT-MSL) (FD (FT-MSL) (FT-L SD) (FT-MS L) (FT-LSD) THICKNESS SUB3 153 6 260 469420 64.0 6.0 111312 0 15 23.35 6533.72 00 6557 07 72 6465.1 A 56-72 46.6 F 1539906 469554 63.6 4.0 12/1312016 30.14 6534.66 1.2 6564.6 2 62 6501. 6 A 45-65 33.1 FB 1540417 466657 62.0 4.0 9/19/2016 31.41 6 534.25 2.0 6565.66 56 6505. 7 A 43-56 26.6 GH 1536 60 7 469509 69.2 4.0 12/12/2016 30.20 6 5 32.56 1.3 6562.76 67 6494.5 A 55-65 36.1 0644 1536376 467002 75.0 4.0 12/1312 0 16 35.64 6520.29 1.2 6556.13 70 6464.9 A 35-75 35.4 0645 1537260 467633 65.0 4.0 12/1312016 32.96 6524 09 1.7 6557.05 55 6500.4 A 45-65 23.7 AW 1540235 466015 156.0 6.0 12/19/2 016 32.15 6531.26 0.1 6563.43 63 6500.3 A

• 30.9 63 6463.3 u 66-155 67.9 0555 1536572 466236 100.0 5.0 2/16/2 016 40.95 6513.39 30.0 6554.34 100 6424. 3 A 60-90 69.0 0556 153 60 06 486164 100.0 5.0 2/10/2 0 16 47.19 650 8.83 2.8 6556.02 95 6458. 2 A 60-90 50.6 0557 1537204 48600 0 65.0 5.0 2/10/2016 41.55 6512.22 2.5 6553.77 55 6496.3 A 45-65 16.0 0646 1537219 484730 7 5.0 4.0 12/1312 016 43.84 6505.08 0.6 6548.92 65 6463.1 A 40-65 22.0 E.1 Su l fate Concentrations The su lfate concentrations for 2016 for the alluvia l aquifer in Section 34 are presented in Fig u re E-1. The blue contour shows the 2016 s ul fate concentrations with concentrations exceeding 1000 mg/I in the majority of the Section 34 Flood area. The 2016 sulfate concentrations are l i sted adjacent to each of the mon i toring we ll s. A light green pattern is shown on Figure E-1 where 2016 concentrations exceed the site standard of 1,500 mg/I. Grants Reclamation Proj ec t E-1 L a nd Ap plication Imp act A s sess m e nt I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I The sulfate concentrations in alluvial wells 844 and 845 prior to the start of the irrigation in 2000 were gradually declining with time while sulfate concentrations in monitoring well 846 were gradually increasing with time prior to the start of the irrigation program (see Figure E-2 for the 1995 through 2016 data and the sulfate site standard).

Sulfate concentrations in wells 844 and 845 have since exhibited a general increase during the period of irrigation , but their concentrations are significantly less than those observed prior to the mid-1990s. Overall sulfate concentrations in monitoring well 846 have increased during the operation of the irrigation program. Sulfate concentrations in monitoring wells 555 and 844 , which are adjacent to the flood irrigation area were both above the site standard of 1 , 500 mg/l in 2016. An increasing trend starting in late 2011 through 2012 has been observed in wells 844 and 845. This abrupt change in concentrations may be caused by the Section 34 irrigation.

A decreasing trend has been observed in well 845 since 2012 while the concentrations in well 844 have been steady. The sulfate concentrations are thought to be slightly affected by the Section 34 flood irrigation. The higher sulfate concentrations in well 846 are not thought have been influenced at all by the irrigation in Section 34. The sulfate concentrations with time for the alluvial aquifer upgradient of the Section 34 irrigation are presented in Figure E-3. This figure shows that the recent concentrations upgradient of Section 34 are smaller and fairly constant.

E.2 TDS Concentrations The TDS concentrations for 2016 are shown on the alluvial aquifer in Section 34 (see Figure E-4) with a blue contour. A light green pattern is shown on Figure E-4 where 2016 concentrations exceed the site standard of 2 , 734 mg/I. The TDS patterns versus time have shown fairly similar patterns to those of sulfate concentrations (see Figure E-5 which shows the site standard of 2734 mg/I). The TDS concentrations of monitoring wells 844 and 845 were 3500 and 2600 mg/I in 2016. The TDS concentrations in wells 844 and 845 show an increase in 2012 similar to the sulfate increase.

These increases in TDS concentrations are thought to be caused by the Section 34 irrigation. TDS concentrations in monitoring well 846 increased prior to irrigation and during the first five years of irrigation.

They became fairly steady from 2004 through 2009 and then increased at a higher rate for three years prior to becoming fairly steady. The irrigation in Section 34 is not thought to have affected the TDS in well 846 due to its distance from the irrigation area. The TDS concentrations with time for the upgradient wells east and northeast of the Section 34 irrigation are presented in Figure E-6. This figure shows that the recent concentrations upgradient of Section 34 are smaller and fairly constant.

E.3 Chloride Concentrations The chloride concentrations for 2016 are presented in Figure E-7 for the alluvial aquifer in this area. The chloride concentrations in alluvial wells 844 , 845 and 555 exceeded the site standard of 250 mg/I as shown by the I ight green pattern in Figure E-7 in the area of these wells. These exceedances are thought to be caused by the Section 34 irrigation. G r a nt s R e clamati on P ro j e ct E-2 La nd Application Imp act A sses sm e nt Figure E-8 shows the chloride concentrations for monitoring wells 555 , 556 , 557 , 844, 845 and 846 along with the chloride site standard of 250 mg/I. This figure shows chloride concentrations with time for each of these wells. These chloride concentrations were similar to the freshwater injection concentration and were thought to be due to the freshwater inject i on that occurred to the east of this area. The chloride concentrations in monitoring well s 555 , 844 and 845 had been relatively steady during the operation of the Section 34 flood irrigation , but increased in 20 1 2. The abrupt increase in chloride concentrations are thought to be from the Section 34 i rrigation.

A decline in chloride concentration in wells 844 and 845 were observed in 2016. Ch l oride concentrations in these three wells are expected to decline to below 250 mg/I in the near future after the affects from the irrigation have dissipated.

Chloride concentrations ha v e increased since 2000 in monitoring well 846. This increase is thought to be due to the alluvial water moving to the west and not a function of the irrigation program. The chloride concentrations with time for the upgradient wells east and northeast of the Sec t ion 34 irrigation are presented in Figure E-9. The upgradient concentrations have been fairly constant in recent y ears. E.4 Uranium Concentrations Figure E-10 presents 2016 uranium concentrations in the alluvial aquifer near the Section 34 irrigation area. Changes in uranium concentration have been small during the irrigation period. Figure E-11 presents the uranium concentrations versus time for wells 555 , 556 , 557 , 844 , 845 and 846. This shows fairly small uranium concentrations changes with a slight increase in 2004 through 2012 in well 844. This small increase could be due to higher levels moving into th i s area or it could be due to the Section 34 irrigation but all values in 2016 are les s than the site standard of 0.16 mg/I except well 556. The decline in uranium concentrations since the ceasing of irrigation indicates that the Section 34 irrigation caused the uranium increases in well 844. The higher value from well 556 in 2016 is thought to be an outlier and should not be given any significance until it is confirmed.

Figure E-12 presents the uranium concentrations versus time for upgradient wells AW , F , FB , GH and SUB3. This plot shows fairly similar uranium concentrations changes for the upgradient wells. E.5 Selenium Concentrations The selenium concentrations for 2016 are presented in Figure E-13 for the alluvial aquifer in the area of the Section 34 irrigation.

Selenium concentrations were all less than 0.1 mg/I in 2016 in the irrigation area with the exception of well 846. Figure E-14 presents the selenium concentrations showing an increase in selenium concentrations in 2002 and 2003 in wells 844 and 845 , respectively. The selenium site standard of 0.32 mg/I is shown on this figure for comparison with the observed data. An increase in selenium concentrations was observed in well 846 starting in 1996. The selenium concentrations are thought to be caused by variations in water coming into this area but the small increases in wells 844 and 845 could plausibly be a result of the irrigation program. Figure E-15 presents the selenium concentrations versus time G ran ts R ecla m a tion Pro jec t E-3 Land A p p l ica tion Imp act Assess m e nt I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I for upgradient wells and shows smaller selenium concentrations with time in the upgradient wells. E.6 Molybdenum Concentrations The molybdenum concentrations for 2016 are presented in Figure E-16 for the Section 34 area. All of the concentrations near the Section 34 irrigation are less than 0.03 mg/I, except for a value of 0.05 mg/I in well 846. Figures E-17 and E-18 shows the molybdenum concentrations versus time and shows that these concentrations have been low since the start of irrigation in 2000 and that the higher value in well 846 in 2016 is likely an outlier. Higher but declining molybdenum concentrations are shown in upgradient well AW which are not expected to affect the Section 34 irrigation area. E. 7 Nitrate Concentrations The nitrate concentrations are presented in Figures E-13, E-14 and E-15. Nitrate concentrations had stayed fairly steady and low in wells 844 and 845 during the irrigation operation but slightly increased after 2012. If this small increase is due to the irrigation it should dissipate in the near future. The nitrate concentrations in well 846 were on a significant increasing trend prior to irrigation and this trend has continued with the recent values some lower. Because the increasing trend predates irrigation, these changes are not thought to be a function of the irrigation program. The upgradient nitrate concentrations are small. E.8 Radium-226 plus Radium-228 Concentrations The radium-226

+ radium-228 concentrations for 2016 are presented in Figure E-22 for the Section 34 area. All of these concentrations near the Section 34 irrigation are less than the site standard of 5 pCi/I and as expected are not significant because the irrigation water did not contain significant levels. Figures E-17 and E-18 show the radium concentrations versus time and shows that these concentrations are generally low with a few higher values that are likely outliers.

E.9 Vanadium Concentrations The vanadium concentrations for 2016 are presented in Figure E-2.5 for the Section 34 area. All of these concentrations near the Section 34 irrigation are less than the detection level of 0.01 mg/I and not significant as expected because the irrigation water did not contain significant levels of vanadium. E.10 Thorium-230 Concentrations The thorium-230 concentrations for 2016 are presented in Figure E-26 for the Section 34 area. The largest concentration is 0.1 pCi/l near the Section 34 irrigation and is less than the site standard of 0.3 pCi/l and not significant as expected because the irrigation water did not contain significant levels. Grants Reclamation Project E-4 Land Application Impact Assessment FLOOD IRRIGATION 120 AC FLOOD 56

• "

• 764

• c$> 685

• 553 SCALE* 1 * = 1000' C\PRD..ECTS\2017-06

\ l6llOllAL-!RRIGAT!CNs.c34 DATE* 6/15/2017 485400 497 498 CIJ44' L 15' Q 'Jells Relnge 539-769 487400 FIGURE E-1. 2016 SULFATE LEGEND "II}< ALLUVIAL WELL 0.05 2018 804 CONC., mc/L -500 CONTOUR AND LABEL .,,._ >tatlO...,.

ALLUVIAL AQUIFER BOUNDARY ALLUVIAL CONCENTRATIONS IN SECTION 34, mg/L HOMESTAKE MINING COMPANY GRANTS, NEIJ MEXICO E-5 I I I I I I I I I I I I I I I I I I I

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.. w __J :::> (/) 3000 2500 2000 1000 500 x Legend

• 555 £ 556 * *

• x 557 844 845 846 ----Site Standard 1500

• 1995 1997 1999 2001 2003 2005 2007 2009 2011 2013 2015 2017 FIGURE E-2. SULFATE CONCENTRATIONS FOR WELLS 555, 556, 557, 844, 845 AND 846.

3000 L egend

• AW

• F 2500

• FB

• G H x SUB3 S i te Standard 1500 2000 ..._ C'I E x x ... w 1500 ; t;'1 I _, __J => (/) x 1000 500 1995 1997 1999 2001 2003 2005 2007 2009 2011 20 1 3 2015 2017 FIGURE E-3. SULFATE CONCENTRATIONS FOR WELLS AW, F ,FB, GH AND SUB3. -------------------

I I I I I I I I I I I I I I I I I I I SCALE* 1' = 1000' FLOOD IRRIGA TIDN 120 AC FLOOD 485400 487400 FIGURE E-4. 2016 TDS 1550 540, 862 , 865 & 10 R \Jells 1400-1940

• 1900

• 1840 ct

• 1700 c \Jells Ro.nge LEGEND lb.Jo ALLUVIAL WELL 0.05 2018 TDS CONC., ma/L -500 CONTOUR AND LABEL ALLUVIAL AQUIFER BOUNDARY D\PRD..ECTS'2017-06\

1 600QAL-IRRIGATIDN,..c34 ALLUVIAL CONCENTRATIONS IN SECTION 34, mg/L HOMESTAKE MINING COMPANY GRANTS, NEIJ MEXICO DATE* 8/14/2017 E-8

• 5000 Lege n d 4500

• 555 .. 556 (<

• 557 'f. x 4000

• 8 4 4 ...._

• 845 O'I x 846 E 3500 .... S i te S t a n da r d 27 3 4 A<--xx Xx l/) 0 :x* xx x 1-4 _J 0 3000 l/) 0 w 2500 t;'1 0 "' l/) 2000 l/) 1-4 0 _J 1500 1000 1995 1997 1999 2001 2003 2005 2007 2009 2011 2013 2015 2017 FIGURE E-5. TDS CONCENTRATIONS FOR WELLS 555, 556, 557 I 844, 845 AND 846. -------------------

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5000 4500 4000 ...._ O'I E ... 3500 Cf) 0 1--4 _J 3000 0 Cf) 0 w 2500 > _J t;"I 0 0 Cf) Cf) 2000 1--4 0 _J 1500 1000 Legend

• AW

• F

• FB

• GH x SUB3 Site Standard 2734 )( I x >< XX xx xx x x x 1995 1997 1999 2001 2003 2005 2007 2009 2011 2013 2015 2017 FIGURE E-6. TDS CONCENTRATIONS FOR WELLS AW , F , FB , GH AND SUB3.

FLOOD IRRIGATION 120 AC FLOOD 0 0 227 188 ." 134 SCALE* I' : 1000' O\PRll..EC T S'2017--o6' 1600llloL-IRRIGll Tlctlsec34 DATE* 8/1 4/2017 c \Jells Range 112-113 131-179 LEGEND 't>q}< ALLUVIAL WELL 0.05 20111 Cl CONC., ma/I. -500 CONTOUR AND IABEL 485400 487400 FIGURE E-7. 2016 CHLORIDE ALLUVIAL CONCENTRATIONS IN SECTION 34, mg/L E-11 ALLUVIAL AQUIFER BOUNDARY HOMESTAKE MINING COMPANY GRANTS, NE'W MEXICO I I I I I I I I I I I I I I I I I I I

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1 600 400 --O'I E UJ 0 1--4 0::: r,n 0 N _J I u 200 Legend

• SSS A SS6

• SS7

• 844

• 84S x 846 Site Standard 2SO I x )( x x x -X 1995 1997 1999 2001 2003 2005 2007 2009 2011 2013 2015 2017 FIGURE E-8. CHLORIDE CONCENTRATIONS FOR WELLS 555 , 556 , 557 , 844, 845 AND 846.

600 400 -.... rn E ... w 0 1--1 0:::: t;"I 0 w _J I u 200 Leg e n d

• AW .. F

• FB

• GH x SUB 3 S i te S ta n d ard 250 1995 1997 1999 2001 2003 2005 2007 2009 2011 2013 2015 2017 FIGURE E-9. CHLORIDE CONCENTRATIONS FOR WELLS AW, F, FB, GH AND SUB3. -------------------

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I I I I I I I I I I I I I I I I I I I SCALE* 1' = 1000' FLOOD IRRIGATION 120 AC FLOOD 485400 487400 497 498 C'J44' L 15' Q 'Jells RQnge LEGEND q,tl* ALLUVIAL WELL 0.05 2018 1JRANIU)( CONC., me/I. -500 CONTOUR AND LABEL ALLUVIAL AQUIFER BOUNDARY D\PRO..ECTS,2017

-06' 1600QAL-IRRIGA TICNs*c34 FIGURE E-10. 2016 URANIUM AllUVIAL CONCENTRATIONS IN SECTION 34, mg/L HOMESTAKE MINING COMPANY GRANTS , NE\o/ MEXICO DA TE* 8/14/2017 E-14

• 0.5 0.4 ...._ 0.3 O"I E ... ::::> -c;ri z V> 0.2 ::::> 0.1 Legend

• 555 A 556

• 557

• 844

• 845 x 846 Site Standard 0.16 1995 1997 1999 2001 2003 2005 2007 2009 2011 2013 2015 2017 FIGURE E-11. URANIUM CONCENTRATIONS FOR WELLS 555, 556, 557, 844, 845 AND 846. -------------------

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0.5 0.4 ...._ 0.3 O'I E ... :::> 1--1 c;n z °' 0.2 :::> Legend

• AW A F

• FB

• GH x SUB3 Site Standard 0.16 1995 1997 1999 2001 2003 2005 2007 2009 2011 2013 2015 2017 FIGURE E-12. URANIUM CONCENTRATIONS FOR WELLS AW, F, FB, GH AND SUB3.

FLOOD IRRIGATION 120 AC FLOOD 0.01 0.03-0.05 *

• 0.01

• 0.01 c.j7i* a 'Wells Ro.nge [o.o3-0.06 LEGEND

• ALLUVIAL WELL SCALE* 1' = 1000' D\PRD.£CTS'2017-o6' 1600fW.-IRRIGATillNHc34 DATE* 8/14/2 017 0.05 20111 SB CONC., ma/I. -500 CONTOUR AND LABEL 485400 487400 FIGURE E-13. 2016 SELENIUM ALLUVIAL CONCENTRATIONS IN SECTION 34, mg/L E-17 ALLUVIAL AQUIFER BOUNDARY HOMESTAKE MINING COMPANY GRANTS, NE'W MEXICO I I I I I I I I I I I I I I I I I I I

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0.5 0.4 ...........

O'I 0.3 E ... L :::> -r:i z Ll.J 00 _J Ll.J (J) 0.2 0.1 Legend

• 555 A 556

• 557

• 844

• 845 x 846 Site Standard 0.32 x Xx x x 'XX ,,)( xxx 1995 1997 1999 2001 2003 2005 2007 2009 2011 2013 2015 2017 FIGURE E-14. SELENIUM CONCENTRATIONS FOR WELLS 555, 556, 557, 844, 845 AND 846.

0.5 0.4 ...._ O'l 0.3 E ... :::> 1-1 c;i z w '-0 _J w 0.2 CJ) Legend

• AW

• F

• FB

• G H x 846 SUB3 1995 1997 1999 2001 2003 2005 2007 2009 2011 2013 2015 20 1 7 FIGURE E-15. SELENIUM CONCENTRATIONS FOR WELLS AW, F, FB, GH AND SUB3. -------------------

I I I I I I I I I I I. I I I I I I I I SCALE* 1' = 1000' FLOOD IRRIGATION 120 AC FLOOD 485400 487400 0.05 * <0.03 * <0.03

• <0.03 ti ' 'Jells Rcinge <0.03-0.04 1 ALL <0.03 LEGEND 't>.J< ALLUVIAL WELL 0.05 20HI KO CONC., mc/L -500 CONTOUR AND LUIEL ALLUVIAL AQUIFER BOUNDARY O\PRD.JECTS'2017-Q6' 1600QAL-IRRIGATIDNs.c34 FIGURE E-16. 2016 MOLYBDENUM ALLUVIAL CONCENTRATIONS IN SECTION 34, mg/L HOMESTAKE MINING COMPANY GRANTS, NE'w' MEXICO DATE* 8/14/2017 E-2 0

• 0.5 0.4 ...._ O'I E 0.3 ... :::> z w c;i 0 "' ca 0.2 0 Legend

• S SS

• SS6

• SS7

• 844

• 84S x 846 Site S tandard 0.1 1995 1997 1999 2001 2003 2005 2007 2009 2011 2013 2015 2017 FIGURE E-17. MOLYBDENUM CONCENTRATIONS FOR WELLS 555, 556, 557, 844, 845 AND 846. -------------------

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0.5 0.4 ..._ O'I E 0.3 ... :::> z w r;i 0 N co N >-_J 0.2 0 Legend

• AW A F

• FB

• GH x SUB3 Site Standard 0.1 1995 1997 1999 2001 2003 2005 2007 2009 2011 2013 2015 2017 FIGURE E-18. MOLYBDENUM CONCENTRATIONS FOR WELLS AW, F, FB, GH AND SUB3.

SCALE* l' = 1000' FLOOD IRRIGATION 120 AC FLOOD 25 6.0

• 7.9 485400 u 487400 540, 862, 865 a. 10 R \Jells 1.2-3.6 1.8

• 1.8

• 1.8 I 497 498. I C'IJ44' &. 15 Q \Jells Ro.nge j t.8-13.0 LEGEND 'bq}< ALLUVIAL WELL 0.05 2018 NOS CONC., ma/l. -500 CONTOUR AND IABEL ALLUVIAL AQUIFER BOUNDARY D\PRDJECTS'2017-o6' 1600QAL-IRIUGllTIONs.c34 FIGURE E-19. 2016 N03 HOMESTAKE MINING COMPANY GRANTS, NE'IJ MEXICO DATE* 8/14/2017 ALLUVIAL CONCENTRATIONS IN SECTION 34, mg/L E-23

• I I I I I I I. I I I I I I I I I I

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40 30 ...._ O'l E w 20 m Iv ... I-1--1 z 10 Legend

• 555 x A 556

• 557 ><

• 844 x )(-'

• 845 x 846 Site Standard 12 ,,x )< x )( x x x x x x _)( )( x 1995 1997 1999 2001 2003 2005 2007 2009 2011 2013 2015 2017 FIGURE E-20. NITRATE CONCENTRATIONS FOR WELLS 555, 556, 557 I 844, 845 AND 846.

40 30 ....._ O'l E ... LI.J 20 I-m N V> I-1--t z 10 Legend ---e---AW __._ F

• FB GH

• x SUB3 ----Site Standard 12 1995 1997 1999 2001 2003 2005 2007 2009 2011 2013 2015 2017 FIGURE E-21. NITRATE CONCENTRATIONS FOR WELLS AW, F, FB, GH AND SUB3. -------------------

I I I I I I I I I I I I I I I I I I I SCALE* l' = 1 000' FLOOD IR RIGA TIDN 120 AC FLOOD 1.3 *tt 485400 487400 2 AC E8-3 0.07-3.1 497, 498, C'JH &. 15 Cl 'Wells Ro.nge LEGEND 'bt}-ALLUVIAL WELL

• 0.05 20UI Ra-228+Ra-228 CONC., pCi/L -500 CONTOUR AND LABEL O'J'Rll.JECTS\2017-06\

1 600QN.. -IRRIGll TlllNsec34 DATE* 8/14/2017 FIGURE E-22. 2016 Ra-226+Ra-228 ALLUVIAL CONCENTRATIONS IN SECTION 34, pCi/L ALLUVIAL AQUIFER BOUNDARY HOMESTAKE MINING COMPANY GRANTS, NE'J MEXICO E-26 10 8 :----... u Cl. 6 ... ex:> N N I ro 0::: tn + .:.. _, \.0 N 4 N I ro 0::: 2 Legend

• SSS A-SS6

• SS7

• 844

• 84S x 846 Site Standard S x x __.. ---------X x----X t L ----x 1995 1997 1999 2001 2003 2005 2007 2009 2011 2013 2015 2017 FIGURE E-23. Ra-226+Ra-228 CONCENTRATIONS FOR WE LLS 555 , 556 , 557 , 844 , 845 AND 84 6. -------------------

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10 8 -..... u 0. 6 ... 00 N N I ro a:: t;'1 + IV 00 \0 N 4 N I ro a:: 2 Legend

• AW __. F

• FB

• GH x SUB3 S i te Standa rd 5 \ \ \ I x x 1995 1997 1999 2001 2003 2005 2007 2009 2011 2013 2015 2017 FIGURE E-24. Ra-226+Ra-228 CONCENTRATIONS FOR WELLS AW, F, FB, GH AND SUB3.

SCALE* 1' = 1000' FLOOD IRRIGATION 120 AC FLOOD <0.01 *tt1 485400 <0.01 u 487400 o.ll <0.01 497 498 C'J44' L 15' C 'Jells Ran11.e o.ll <O.ul LEGEND .,.Jf ALLUVIAL WELL 0.05 20UI Va CONC., me/I. -500 CONTOUR AND LlBBL ALLUVIAL AQUIFER BOUNDARY O\PRIJJECTS\2017-06

\ 1600llAL-IRRIGA TICJNsec34 FIGURE E-25. 2016 Vanadium ALLUVIAL CONCENTRATIONS IN SECTION 34, mg/L HOMESTAKE MINING COMPANY GRANTS, NEW' MEXICO DATE* 8/14/2017 E-29

• I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I SCALE* I' = 1000' FLOOD IRRIGATION 120 AC FLOOD 0.1 oqf 485400 487400

-0.03-0.1 497, 498 C'w'44 L 15' C 'w'ells Rnnge -0.02-0.2 LEGEND ALLUVIAL WELL 0.05 20111 Th-230 CONC., pCi/L -500 CONTOUR AND LABEL ALLUVIAL AQUIFER BOUNDARY 0 D\PRD.ECTS\2017-06\

1600QAL-IRRIGllTICINs.c34 DATE* 8/14/2017 FIGURE E-26. 2016 Th-230 ALLUVIAL CONCENTRATIONS IN SECTION 34, pCi/L HOMESTAKE MINING COMPANY GRANTS , NEW' MEXICO E-30 APPENDIXF GROUND WATER SECTION 28 IRRIGATION AREA CONCENTRATION MAPS AND PLOTS I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I APPENDIX F TABLE OF CONTENTS GROUND WATER SECTION 28 IRRIGATION AREA CONCENTRATION MAPS AND PLOTS Page Number F.O GROUND WAT E R SECTION 28 ..............................................

........................... F-1 F.1 SULFATE CONCENTRATIONS

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F-3 F.2 T DS CONCENTRATIONS

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................... F-3 F.3 CHLORIDE CONCENTRATIONS

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F-3 F.4 URANIUM CONCENTRATIONS

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F-4 F .5 SELENIUM CONCENTRATIONS

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.................... F-4 F.6 MOLYBDENUM CONCENTRATIONS

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F-4 F.7 NITRATE CONCENTRATIONS

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F-5 F.8 Ra-226+Ra-228 CONCENTRATIONS

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F-5 F.9 VANADIUM CONCENTRATIONS

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F-5 F.10 TH ORIUM-230 CONCENTRATIONS

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F-5 FIGURES F-1 2016 SULFATE ALLUVIAL CONCENTRATIONS IN SECTION 28 , mg/I ...........

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F-6 F-2 SULFATE CONCENTRATION FOR WELLS 881 , 882 , 884 , 886 , 890 AND 893 ...........

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................................. F-7 F-3 SULFATE CONCENTRATION FOR W ELLS MQ , MR, MS , MV , AND 885 ... F-8 F-4 2016 TDS ALLUVIAL CONCENTRATIONS IN SECTION 28 , mg/I ..........

...... F-9 F-5 T DS CONCENTRATION FOR WELLS 881 , 882 , 884 , 886 , 890 AND 893 ...............

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........................ F-10 F-6 T DS CONCENTRATION F OR W EL LS MQ, MR , MS, MV , AND 885 ...........

F-11 F-7 2016 CHLORIDE ALLUVIAL CONCENTRATIONS IN SECTION 28, mg/1 ..................

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............. F-12 F-8 CHLORIDE CONCENTRATION FOR WELLS 881 , 882 , 884 , 886 , 890 AND 893 ..............................

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F-13 F-9 CHLORIDE CONCENTRATION FOR WELLS MQ , MR, MS, MV, AND 885 .........................

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.. F-14 F-10 2016 URANIUM ALLUVIAL CONCENTRATIONS IN SEC TI ON 28 , m g/I ..........

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F-15 Grants Reclamation Project F-i Land App lication I mpact Assess men t TABLE OF CONTENTS GROUND WATER SECTION 28 IRRIGATION AREA CONCENTRATION MAPS AND PLOTS Page Number FIGURES (CONTINUED)

F-11 URANIUM CONCENTRATION FOR WELLS 881 , 882, 884 , 886 , 890 AND 893 .....................................................................................................

... F-16 F-12 URANIUM CONCENTRATION FOR WELLS MQ , MR , MS , MY , AND 885 ........................................................................

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....... F-17 F-13 2016 SELENIUM ALLUVIAL CONCENTRATIONS IN SECTION 28 , mg/l .......................

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............................. F-18 F-14 SELENIUM CONCENTRATION FOR WELLS 881 , 882 , 884 , 886 , 890 AND 893 .............................

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..... F-19 F-15 SELENIUM CONCENTRATION FOR WELLS MQ , MR , MS , MV , AND 885 ................................

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... F-20 F-16 2016 MOLYBDENUM ALLUVIAL CONCENTRATIONS I N SECTION 28 , mg/I ........................................................................................................

....................... F-21 F-17 MOLYBDENUM CONCENTRATION FOR WELLS 881 , 882 , 884, 886, 890 AND 893 ..................................

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............ F-22 F-18 MOLYBDENUM CONCENTRA TJON FOR WELLS MQ , MR , MS , MY , AND 885 .......................................................................

.................................................. F-23 F-19 2016 NITRATE ALLUVIAL CONCENTRATIONS IN SECTION 28 , mg/I ............................................................................................... F-24 F-20 NITRATE CONCENTRATION FOR WELLS 881 , 882 , 884 , 886 , 890 AND 893 ...................

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F-25 F-21 NITRATE CONCENTRATION FOR WELLS MQ , MR , MS, MY , AND 885 .............................................................................

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F-26 F-22 2016 Ra226+Ra228 ALLUVIAL CONCENTRATIONS IN SECTION 28 , pCi/l ...........................

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... F-27 F-23 Ra-226+Ra-228 CONCENTRATION FOR WELLS 881 , 882, 884 , 886, 890 AND 893 ..................................................

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.. F-28 F-24 Ra-226+Ra-228 CONCENTRATION FOR WELLS MQ , MR , MS , MY , AND 885 .....................

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.................................. F-29 Gran ts R e clamation Proj ec t F-ii Land A p pli c ation Imp ac t Assess m e nt I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I TABLE OF CONTENTS GROUND WATER SECTION 28 IRRIGATION AREA CONCENTRATION MAPS AND PLOTS Page Number FIGURES (CONTINUED)

F-25 2016 VANADIUM ALLUVIAL CONCENTRATIONS JN SECTION 28 , mg/I .................

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F-30 F-26 2016 Th-230 ALLUVIAL CONCENTRATIONS JN SECTION 28 , pCi/l ......... F-31 TABLES F-1 SECTION 28 MONITORING WELL DATA ................

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............. F-2 Grants Reclamation Proj ec t F-i ii Land Application Im pact Assess m ent F.O Section 28 The Section 28 area has consisted of 60 acres of center pivot irrigation from 2002 through 2004 , and, after expansion of the center pivot area, 100 irrigated acres from 2005 through 2009 and in 2011 and 2012. Figure F-1 shows the location of the 100 acre center pivot. The Sec t ion 28 irrigation area exists over the San Mateo alluvial aquifer which extends to the western port i on of Section 28. The San Mateo alluvium joins the Rio San Jose alluvium in the western portion of Section 28 and the background concentrations in the alluvial aquifer are the appropriate water sta ndards for the Section 28 irrigation zone. Numerous monitoring wells exist in this area and have been used to define the water quality changes with time (see Tab l e F-1). Usage of San Andres well 951R for fresh water injection replaced well 951 in 2012. The TDS , sulfate , and chloride concentrations in well 951 Rare naturally higher than the values in well 951. The main monitoring wells for the North irrigation area are wells 881 , 882 , 884 , 886 and 893. Additional wells are monitored for water quality changes down gradient of the center pivot which has very similar water quality to the alluvial aquifer in the center pivot area. Several wells are also monitored to define the water quality upgradient and to the east of the center pivot. T he well data for the numerous new H wells added to the area are not included in the Tab l e F-1 but are presented in the Annua l Performance Report. Gra nt s R e cl a mation Proj ec t F-1 Land Application Imp act Assessmen t I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I Table F-1. Section 28 Monitoring Well Data MP WELL CASING WATER LEVEL ABOVE WELL NORTH. EAST. DEPTH DIAM DEP I H ELEV. LSD MP ELEV. NAME COORD. COORD. (FT-MP) (IN) DATE (FT*M P) (FT-MSL) (FT) (FT*MSL) MQ 1543173 486326 98.0 5.0 3/16/2016 69.99 6504.31 1.6 6574.30 0688 1541257 483955 105.0 5.0 12/1312016 58.56 6504.06 2.9 6562.62 0633 154 146 7 479642 83.0 8.0 12/6/2011 32.40 6525.16 0.0 6557.56 0634 1541652 480362 103.0 4.5 12/1212016 70.82 6489.25 2.8 6560.07 0654 1541994 478636 120.0 4.5 12/1212016 71.45 6479.05 1.4 6550.50 0655 1541620 479830 96.0 8.0 4115/2010 7230 6485.88 6558.18 0656 1542578 478333 88.0 8.0 12/1212016 72.00 6482 07 655407 0659 1541689 480772 101.0 4.5 12/1212016 86.70 6473.47 2.0 6560.17 0680 1543850 478746 80.0 4.5 12/1212016 7325 6485.62 2.0 6558.87 0681 154067 6 482734 117.0 6.0 12/1312016 63.03 6497.49 2.1 6560.52 0 684 1540273 478499 143.0 6.0 10/13/2015 80.50 6472.78 2.0 6553.28 0881 1542034 481478 96.0 4.5 12/1212016 71.18 6493.86 2.0 6565 04 0882 1541404 482396 110.0 4.5 2/1812016 6130 6499.86 2.0 6561.16 0883 1540097 483039 100.0 5.0 11/30/2015 5708 6500.05 1.9 6557.13 0884 1542677 481498 90.0 5.0 2/18/2016 68.26 6497.84 1.0 6566.10 0885 154 19 19 483474 100.0 5.0 12/1212016 6380 6500.84 1.5 6564.64 0886 1542327 482487 90.0 5.0 12/1212016 67.40 6497.15 1.5 6564.55 0887 1543063 482469 67.0 5.0 12/1212016 59.54 6508.19 1.5 6567.73 0888 1542285 479335 105.0 5.0 12/1212016 74.43 6482.90 1.1 6557.33 0889 1540047 480222 65.0 5.0 11/30/2015 62.40 6487.23 1.5 6549.63 M16 1543252 485112 93.3 5.0 12/1212016 59.38 6511.21 1.4 6570.59 MO 1543620 485518 88.0 4.5 12/1212016 60.41 6512.48 2.0 6572.89 MR 1542609 483574 100.0 5.0 12/1212016 66.49 6499.77 1.8 6566.26 MS MT MV 1542607 485570 82.0 5.0 6/30/2016 59.60 6511.07 1.5 6570.67 1543221 483531 98.0 4.5 12/12/2016 6200 6505.43 2.3 6567.43 1542618 484418 105.0 4.5 12/1212016 64.51 6505.27 1.3 6569.78 DEPTH TO BASE OF ALLUVIUM (FT-LSD) 88 95 95 95 106 88 88 97 75 111 1 18 103 98 96 85 95 87 60 90 60 100 80 100 89 87 95 ELEV. TO CASING BASE OF PERFOR-ALLUV IUM AT I ONS SATURATED (FlMSL) (FT-LSD) THICKNESS 6484.7 A 56-98 19.6 6464.7 A 6 5-105 6462.6 A 1 1-83 6462.3 A 100 6443.1 A

---A 2 1-84 --A 6-88 6461.2 A 61-101 6461.9 A 6447.4 A 67-117 6433.3 A 143 6460.0 A 76-96 6461.2 A 6459.3 A 6480.2 A 56-88 6468.1 A 6476.1 A 6506.2 A 42-67 6466.2 A 75-10 5 6488.2 A 35-65 6469.2A 6490.9 A 45-85 6464.5 A 54-94 6480.2 A 52-82 6478.1 A 34-94 6473.5 A 75-105 39.3 62.6 27.0 36.0 12.3 3.8 50.1 39.5 33.8 38.7 40.8 17.7 327 21.1 2.0 16.7 0.0 42.0 21.6 35.3 30.9 27.3 31.8 Note: additional H wells have been added in the Section 28 area , see Annual Performance Report. Gra nts R ec lam ation Project F-2 Land Applicat i on Im pact Assessment F.1 Sulfate Concentrations Figure F-1 shows the sulfate concentrations for 2016 and the 1000 mg/I contour extends to the eastern edge of Section 28. In 2012 , the 1000 sulfate contour e x tended through the central portion of Section 28 pivot but has been reduced by the ground water rest o ration in this area. The sulfate concentration plots for wells 881 , 882 , 884 , 886 , 890 and 893 are shown on Figure F-2 with the site standard of 1500 mg/I. Well 890 is included with the North pivot monitoring wells because it shows the restoration that has occurred during the recent ground-water restoration west of the pivot. This figure shows that the sulfate concentrat i ons were decreased significantly in monitoring wells 884 and 886 in 2006 through 2008. These two wells are located in the north half of the pivot in Section 28 and show the reduction o f the sulfate concentrations along the northern edge in Section 28 due to fresh water injection to the north of these wells. Sulfate concentrations increased in these wells in 2011and2012 due to variation in the fresh water injection.

It is difficult to determine if the Section 28 center pivot irrigation had any effect on the sulfate concentrations in the alluvial aquifer in this area because higher concentrations exist in the North plume ground water. Sulfate concentration plots for wells MQ , MR , MS , MV and 885 which are upgradient of the Section 28 irrigation are shown on Figure F-3 with the site standard of 1500 mg/I. Concentrations from wells 885 and MS are similar to those in the Section 28 irrigation area while concentrations are some higher in the remainder of the wells in this plot. This figure shows that the sulfate concentrations upgradient of Section 28 could cause the concentrations to slightly increase in Section 28 with time. F.2 TDS Concentration s TDS concentrations for the alluvial aquifer in Section 28 are presented in Figure F-4 and shows the 2000 mg/I contour extending to the west side of the center pivot in 2016. The 2000 m g/I contour existed farther to the west prior to the start of the irrigation. Figur e F-5 shows similar declines in TDS concentrations relative to the site standard of 2734 mg/I in wells 884 and 886 as those observed for sulfate concentrations.

Some decrease in the last few y e ars has occurred after the increases in 2011 and 2012 due to the ground water restoration program (see the r ecent decline in well 890). Figure F-6 presents the TDS concentration plots for wells MQ , MR , MS , MV and 885 which are upgradient of Section 28. Concentrations from wells MQ and MR are slightly higher than those in the Section 28 irrigation area and could cause the concentrations to slightly increase in Section 28 with time. F.3 Ch l oride Concentrations The chloride concentrations in Section 28 are presented in Figure F-7 for 2016. The chloride contour of 200 mg/I extends to the western edge of the Section 28 pivot. The fresh water injection in this area (see Figures F-8 and F-9 for the time plots and the site standard of 250 mg/I) decreased the chloride concentrations in wells 884 and 886 in 2007 through 2009. The chloride concentrations in the fresh water injection supply increased from 60 to 150 mg/I in 2012 Gr a n ts R ec l a mation Proj ec t F-3 L a nd App li ca tion Imp act Assess m e nt I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I due to switching from well 951 to 951 R. The recent decline in well 890 is due to using the post treatment tank (PTT) water for ground-water restoration in this area. These plots also show that the chloride concentrations are only slightly higher upgradient of the irrigation area. F.4 Uranium Concentrations The uranium concentrations for the alluvial aquifer in Section 28 are presented in Figure F-7. This figure shows a green pattern which is the area where concentrations exceed the site standard of 0.16 mg/I in 2016. The pre-irrigation contour and pattern extended further to the west and southwest of the area than in the more recent 2016 mapp i ng which reflect s the Off-site restoration system operation in Section 28. Figure F-11 shows the decrease in concentrations that have been observed in monitoring well 884. The recent decreases in uranium concentrations observed in North collection supply well 890 shows the uranium restoration that has occurred near the western limit of the North plume. The North plume uranium concentrations make it very difficult to determine if any change in ground water uranium concentration is due to the center pivot irrigation.

Figure F-12 presents the uranium concentration plots for wells MQ , MR , MS , MY and 885 which are upgradient of Section 28. Uranium concentrations from well MQ are higher than those in the Section 28 irrigation area and cou ld cause the concentrations to slightly increase in Section 28 with time. F.5 Selenium Concentrations Figure F-13 presents the 2016 se l enium concentrations for the Section 28 area. T he selenium concentration contour of 0.1 mg/I extended to the western edge of Section 28 prior to irrigation and has been restored to the point where the contour does not extend to the western half of Section 27 in 2016. Figure F-14 presents the selenium concentration time plot for the Section 28 monitoring well s and shows the site standard of 0.32 mg/I. This plot shows a decline in the selenium concentrations in wells 884 and 886. Selenium concentrations are presently small in all of these wells. If any selenium effects on the ground water from the Section 28 irrigation occurred , they have dissipated.

The selenium plot of the wells upgradient of Section 28 shows some values slightly higher than the Section 28 values but are not significant relative to the site standard (s ee Figure F-15). F.6 Molybdenum Concentrations The molybdenum concentrations for the alluvial aquifer are presented in Figure F-16. This area shows very lo w molybdenum concentrations except for a small value in well MR and the area in western portion of Section 27 where the site standard is exceeded in a small area. Figures F-17 and F-18 show the molybdenum concentrations have been very small in the Section 28 monitor in g wells relative to the site standard of 0.1 mg/I but have been higher in upgradient well MQ (see Figure 4-1 for location of well MQ). This data shows that the alluvial ground-water G r a n ts R e clam a tion Pro j ec t F-4 La nd Application Im pact A s s ess ment molybdenum concentrations in the Section 28 area have not been affected by the application of water to this irrigation area. F. 7 Nitrate Concentrations The nitrate concentrations in 2016 only exceeded 10 mg/I to the northeast of Figure F-19 in a portion of the eastern half of Section 27 and adjacent to the zero saturation boundary. The nitrate concentrations that are slightly higher in the center pivot area are thought to be remnants from the higher values that existed in the northern portion of Section 28 prior to irrigation. Figures F-20 and F-21 present the nitrate concentrations with time and shows very small changes in nitrate concentrations except for the decreases in Section 28 wells 884 and 886 and upgradient wells MQ and MR. No effects on the ground water nitrate concentrations from the center pivot irrigation have been observed.

F.8 Radium-226 plus Radium-228 Concentrations The radium-226 plus radium-228 concentrations for the alluvial aquifer are presented in F i gure F-22. This map shows very low radium levels except for a few slightly higher values which are thought to be laboratory outliers.

Figures F-23 and F-24 show the radium concentrations have been small in the Section 28 and upgradient monitoring wells. This data shows that the alluvial ground-water radium concentrations in Section 28 have not been affected by the application of water to this irrigation area as expected because the irrigation water contained only low levels of radium. F.9 Vanadium Concentrations The vanadium concentrations in 2016 only exceeded the detection limit in one well in the Section 28 wells and this value is thought to be an outlier because values before and after this value are less than this value (see Figure F-25). The monitoring of vanadium concentrations in Section 28 show that vanadium in the alluvial ground water has not been affected b y the Section 28 irrigation as expected since vanadium concentrations in the irrigation water were very small. F.10 Thorium-230 Concentrations The thorium-230 concentrations for the alluvial aquifer are presented in Figure F-26. This map shows very low thorium levels except for a few slightly higher values which are thought to be l aboratory outliers.

The slightly higher values are be l ow the site standard and not supported by previous values from the wells. This data shows that the alluvial ground-water thorium levels in Section 28 have not been affected by the application of water to this irrigation area as expected because the thorium levels in the irrigation water were not significant.

Gran ts R e cl a m a tion Proj e ct F-5 L a nd A ppli cat ion Imp ac t Assess m e nt I I I I I I I I I I I I I I I I I I I

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.,., °' 100 ACRE CENTER PIVOT > NOTE1 NUMEROUS ADDITIONAL 0 .j' 718 28 33 H VELLS HAVE BEEN ADDED SEE ANNUAL PERFORMANCE REPORT ----1--_ 0, 843 946 732 778 716 ,. ! .,., +" o 0 .381 935 .... ".J' "! 7 8 3 654 0 786 838 "cf>o 654 SCALE* I' = BOO' 650 "--------C*\PRO.JECTS\2017-06\

1600CIAL-lllRIGA TllJN FIGURE F-1. 2016 SULFATE '0 978 0"' ti 762 '° 756 ----,. ... ti 0 ALLUVIAL CONCENTRATIONS IN SECTION 28, mg/L DATE* 6/16/17 / 0 672 1390 \. \)\)\) 4>"" 683 o -" o ASANT VALLE EST TES LEGEND "0;,t:I AIJ.UVIAL WEIJ. 0.05 2016 804 CONC., m1/L -500 CONTOUR AND LABEL ALLUVIAL AQUIFER BOUNDARY HOMESTAKE MINING COMPANY GRANTS, NE'w' MEXICO 1800 1600 1400 1200 ...._ CJ) E 1000 ... UJ I-.,, 800 .:., _J ::> Cf) 600 400 200 Legend

• 881

• 882 .& 884

• 886

• 890 x 893 Site Standard 1500 1995 1997 1999 2001 2003 2005 2007 2009 2011 2013 2015 2017 FIGURE F-2. SULFATE CONCENTRATIONS FOR WELLS 881, 882, 884, 886, 890 AND 893. -------------------

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1800 1600 1400 1200 :::::::::.

O'I E 1000 .. w I-..,, 800 Oo _J :::> l/) 600 Legend 400

• MQ

• MR

• MS

• MV 200

• 885 Site Standard 1500 1995 1997 1999 2001 2003 2005 2007 2009 2011 2013 2015 2017 FIGURE F-3. SULFATE CONCENTRATIONS FOR WELLS MQ, MR, MS, MV AND 885.

28 33 SCALE* 1* = BOO' Co\PROJECTS\2017-06\

1 600QllL -IRRIGI\ TIDN DATE* 9/18/17 100 ACRE CENTER PIVOT ., 1770 1900 1770 '/ 0 0 1980..._..., # .,oJ> v 0 0 0 1540 1820 1970 1550 FIGURE F-4. 2016 TDS 0 "'"1850 '° 1800 ALLUVIAL CONCENTRATIONS IN SECTION 28, mg/L J / 2640 0 "":J.., ALLlMAL WILL 0.05 2016 TDS CONC., m1/L -500 CONTOUR AND LABEL -ALLUVIAL AQUIFER BOUNDARY HOMESTAKE MINING COMPANY GRANTS, NE._, MEXICO -------------------

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3000 2500 2000 ............

O'I E ... 1500 (/) 7' 0 0 I-1000 Legend

• 881

• 882 A 884 500

• 886

• 890 x 893 Site Standard 2734 1995 1997 1999 2001 2003 2005 2007 2009 2011 2013 2015 2017 FIGURE F-5. TDS CONCENTRATIONS FOR WELLS 881, 882, 884, 886, 890 AND 893.

3000 2500 2000 ...........

O'I E ... 1500 l/) 7' 0 -I-1000 Legend

• MQ

• MR A MS 500

• MV

• 885 Site Standard 2734 1995 1997 1999 2001 2003 2005 2007 2009 2011 2013 2015 2017 FIGURE F-6. TDS CONCENTRATIONS FOR WELLS MQ, MR, MS, MV AND 885. -------------------

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7' "' 28 33 SCALE* 1' = 800' C*\PllDJECTS

\2017-06\ 16000AL-JRRJGA TIDN DATE* 9/18/17 0, 178 100 ACRE CENTER PI VDT "/ ---I 4'. 154 166 173 167 ... .,, ... 0 0 83 'bo}> 0 151 181 "<f'o 151 '° 187 / ----FIGURE F-7. 2016 CHLORIDE ALLUVIAL CONCENTRATIONS IN SECTION 28, mg/L J 0 LEGEND ALLUVIAL WELL 208 193 -"o 0.05 2016 CHLORIDE CONC., mc/L -500 CONTOUR AND LABEL ALLUVIAL AQUIFER BOUNDARY HOMESTAKE MINING COMPANY GRANTS, NE._, MEXICO 500 400 :::::::::.

O'I 300 E ... w 0 1--1 0:::: 7' 0 w _J I 200 u 100 L egend

• 88 1

• 88 2

• 884

• 886

• 890 x 89 3 S ite S tan dard 250 'f 1995 1997 1999 2001 2003 2005 2007 2009 2011 2013 2015 2017 FIGURE F-8. CHLORIDE CONCENTRATIONS FOR WELLS 881, 882, 884, 886, 890 AND 893. -------------------

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500 Legend

• MQ

• MR .. MS

• MV 400

• 885 Site Standard 250 ::::::::.

O'l 300 E ... w 0 ........ 0::: 7' 0 ....J I u 200 100 1995 1997 1999 2001 2003 2005 2007 2009 2011 2013 2015 2017 FIGURE F-9. CHLORIDE CONCENTRATIONS FOR WELLS MQ, MR, MS, MV AND 885.

28 33 SCALE* 1' = BOO' C*\PRDJECTS\2017-06\

1600llAL -IRRJGA TJDN DATE* 9/18/17 0, 0.17 100 ACRE CENTER PIVOT '/ '0 0.32 0.20 0;1 OA"32 .. 0.31 *" O 0 ntJ> 0 0 o/ .n)' !a 0.11 oo/ " "! 0 .18 0 0.08 0.19 °*21 .05 FIGURE F-10. 2016 URANIUM ALLUVIAL CONCENTRATIONS IN SECTION 28, mg/L LEGEND t>"J:. ALLUVIAL WEIJ. 0.05 2016 URANIU1I CONC., JDC/L -500 CONTOUR AND LABEL Sift llf'AJl1MJID

>0.11...,, ALLUVIAL AQUIFER BOUNDARY HOMESTAKE MINING COMPANY GRANTS, NEIJ MEXICO -------------------

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*----------

0.8 0.6 ..._ O'I E ' 0.4 :::> 1--f 7' z °' :::> Legend

• 881

• 882 .. 884

• 886

• 890 x 893 Site Standard 0.16 1995 1997 1999 2001 2003 2005 2007 2009 2011 2013 2015 2017 FIGURE F-11. URANIUM CONCENTRATIONS FOR WELLS 881, 882, 884, 886, 890 AND 893.

3.0 2.0 ....._ CJ) E ... :E => 1--1 71 z _, => 1.0 Legend

• MQ

• MR .. MS

• MV

• 885 S i te Standard 0.16 1995 1997 1999 2001 2003 2005 2007 2009 2011 2013 2015 2017 FIGURE F-12. URANIUM CONCENTRATIONS FOR WELLS MQ, MR, MS, MV AND 885. ---------*----------

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7' 00 SCALE* 1' = 800' C*\PRCJECTS\2017-06\

J600QAL-IRRIGA TICN DATE* 9/18/17 100 ACRE CENTER PIVOT 0, 0.02 "/ ----( .rr Om o.o4 o.o5 o .... 1i.05 .... 0.04 0 0 07 ° 0 u.05 " 0 0.01 !.J' "'! 0.05 0.03 0.04 0.04 \ .,o ""' 0.03 '0 0.05 0 "'""0.03 0<0.005/ ---FIGURE F-13. 2016 SELENIUM ALLUVIAL CONCENTRATIONS IN SECTION 28, mg/L -l"o 0.07 \ PL J 0 0.008 0.04 .t 0 0 +oo 0.07 0.03 0 03 ....... ' o "'o ASANT VALLE EST TES -ALLUVIAL AQUIFER BOUNDARY HOMESTAKE MINING COMPANY GRANTS, NE'J MEXICO 0.5 0.4 -...... O"I 0.3 E ... :E => ..........

7' z LU "' .....J LU Cf) 0.2 Leg end

• 8 81

• 882 A 884

• 886

• 890 x 893 S i te Standard 0.32 1995 1997 1999 2001 2003 2005 2007 2009 2011 2013 2015 2017 FIGURE F-14. SELENIUM CONCENTRATIONS FOR WELLS 881, 882, 884, 886, 890 AND 893. -------------------

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0.5 0.4 ..._ C"l 0.3 E ... ::J 1--t ...., z N Ll.J 0 _J Ll.J (/') 0.2 0.1 Legend

• MQ

• MR MS

• MV

• 885 Site Standard 0.32 1995 1997 1999 2001 2003 2005 2007 2009 2011 2013 2015 2017 FIGURE F-15. SELENIUM CONCENTRATIONS FOR WELLS MQ, MR, MS, MV AND 885.

28 33 SCALE* 1' = BOO' Co\PRO.JECTS\2017-06\

1600QAL-IRRIGA TIDN DATE* 9/18/17 +oo 100 ACRE CENTER PIVOT <0.03 \ PL VALLE \ EST TES ) /.; to.03 <0.03 <0.03 \0.04

<Oi3 ° 0 .p , !')> tt>q, <0.03

<:0.04 <0.04<0\3 #'(0 , 03 o./' <0.03

.. 4 0 0 '<0.03 0 _,<i'o ""' <0.03 JI;, <0.03 / --FIGURE F-16. 2016 MOLYBDENUM ALLUVIAL CONCENTRATIONS IN SECTION 28, mg/L <0.03 LEGEND ALLUVIAL WEIJ. 0.05 2016 llOLYBDINUK CONC., mc/L -500 CONTOUR AND L&BIL >0.10 -.II AL L UVIAL AQUIFER BOUNDARY HOMESTAKE MINING COMPANY GRANTS, NEIJ MEXICO -------------------

---

...._ O'l E .... ::E :::::> z w ..,, 0 ,:., ca "' >-_J 0 ::E 0.5 Legend

• 881 0.4

• 882 884

• 886

• 890 x 893 Site Standard 0.1 0.3 0.2 0.1 1 1--;.-, 1995 1997 1999 2001 2003 2005 2007 2009 2011 2013 2015 2017 FIGURE F-17. MOLYBDENUM CONCENTRATIONS FOR WELLS 881, 882, 884, 886, 890 AND 893.

0.5 0.4 ...._ O"I E 0.3 ... ::> z w 'T1 0 ,_, co ""' >-__J 0.2 0 Legend MQ

• MR M S

• MV

• 885 S i te Standard 0.1 1995 1997 1999 2001 2003 2005 2007 2009 2011 2013 2015 2017 FIGURE F-18. MOLYBDENUM CONCENTRATIONS FOR WELLS MQ, MR, MS, MV AND 885. -------------------

---

28 33 SCALE* 1' = BOO' Co\PROJECTS\2017-06\

1600QAL-IRRIGA TIDN DATE* 9/18/17 100 ACRE CENTER PIVOT > ---/.ii' 4.s 3 3 2*9 ..... "' 3.7X .. 0 0 *2.8 # .,.J> ..

2 .4 0 0 2.5 2.7 2.7 .J>" 0 7.9 0 1.6 0 "' 1.7 "cf'o 2.6 0.5 FIGURE F-19. 2016 NITRATE AIJ..UVIAL CONCENTRATIONS IN SECTION 28, mg/L \ / r J 1.6 ) 3 1.8

' 0 0 0 PL ASANT VALLE EST TES 0 LEGEND tit>:;,+:>

ALL'CMAL WEIJ. 0.05 2016 N03 CONC., m1/L -500 CONTOUR AND LABEL ALLUVIAL AQUIFER BOUNDARY HOMESTAKE MINING COMPANY GRANTS, NE'wl MEXICO 30 20 ...._ O'I E ... w ..., ,:.,, v. I-1--1 z 10 Legend

• 881

• 882 .. 884

• 886

• 890 x 893 Site Standard 12 1995 1997 1999 2001 2003 2005 2007 2009 2011 2013 2015 2017 FIGURE F-20. NITRATE CONCENTRATIONS FOR WELLS 881, 882, 884, 886, 890 AND 893. -------------------

---

30 20 ...........

O'l E ... UJ .,, ,:.., °' I-z 10 Legend

• MQ

• MR .. MS

• MV

• 885 Site Standard 12 1995 1997 1999 2001 2003 2005 2007 2009 2011 2013 2015 2017 FIGURE F-21. NITRATE CONCENTRATIONS FOR WELLS MQ, MR, MS, MV AND 885.

.,, ,!.., _, 28 33 SCALE* 1' = BOO' Co\PRDJECTS\2017-06\

1600Q#oL-IRRJGATillN DATE* 9/18/17 0, 100 ACRE CENTER PIVOT '/ ---OJ .,* l ,,, .... ,/'Ol,9 0.6 02.5 ..... 0 0.6 0 4.5 ..... 0" :.J' 0.4 1.8 .. 1.5 0.3 1.3 1.1 ,,,..,, "<Po 0 0.3 3.4 / #2.1 "---------FIGURE F-22. 2 0 16 Ra-226+Ra-228 ALLUVIAL CONC E NTRATIONS IN SECTION 28, pCi/L \ / r ) 4.1 .t 0 ... *.,.. o2,0 o PL ASANT V ALLE EST TES 0 LEGEND ALLUVIAL WEIJ. 1----iu.05 2016 Ra-226+Ra-228 CONC., pCi/L -500 CONTOUR AND LABEL -ALLUVIAL AQUIFER BOUNDARY HOMESTAKE MINING COMPANY GRANTS, NE'w' MEXICO -------------------

---

10 8 ...._ O'I E ... 6 CX) N N I ro a'.'. .,., + ..., 00 \0 N 4 N I ro a'.'. Legend

• 881

• 882 A 884

• 886

• 890 x 893 S i te Standard 5 1995 1997 1999 2001 2003 2005 2007 2009 2011 2013 2015 2017 FIGURE F-23. Ra-226+Ra-228 CONCENTRATIONS FOR WELLS 881, 882, 884, 886, 890 AND 893.

10 8 ::::::::..

O'I E ... 6 00 N N I ro a::: .,, + Iv "' \.0 N 4 N I ro a::: 2 Legen d

• MQ

• MR

• MS MV

• 88 5 S it e Standard 5 1995 1997 1999 2001 2003 2005 2007 2009 2011 20 1 3 2015 2017 FIGURE F-24. Ra-226+Ra-228 CONCENTRATIONS FOR WELLS MQ, MR, MS, MV AND 885. -------------------

---

..,, .:.. 0 28 33 SCALE* 1' = 800' C*\PROJECTS\2017

-06\ 160DQAL-IRRIGA TIDN DATE* 9/18/17 100 ACRE CENTER PIVOT ---\ I# <.O.Gl <O 01 <0.01 "'

'0 <0.01 r J , ... *"o<O.O o -' 0 01 ° """ , ... <0.01 <0.01 0 <0.01 <0.01 <0.01 \ ""-<0.01 FIGURE F-25. 2016 VANADIUM 0"

'° 0.02 ALLUVIAL CONCENTRATIONS IN SECTION 28, mg/L / <0.01 <0.01 0 0 *".. < ' 1 0 * .J> 0 0 "'0 PL ASANT VALLE EST TES 0 LEGEND ALLUVIAL WELL 0.05 2016 Vanadium CONC., iq/L -500 CONTOUR AND LABEL -ALLUVIAL AQUIFER BOUNDARY HOMESTAKE MINING COMPANY GRANTS, NEIJ MEXICO 28 33 SCALE* I' = 800' C*\PRDJECTS\2017-06\

1600QAL-IRRIGA TlllN DATE* 9/18/17 100 ACRE CENTER PIVOT / "'0.01 .,, 0.009 ... # -0.004 °

• 0.1 0 03 * :"1' "! 0.04 ' 0.1 -0.04 0.03 \ e,<f o ""' 0.2 FIGURE F-26. 2016 Th-230 Orf.> .. 0.1 '° 0.04 ALLUVIAL CONCENTRATIONS IN SECTION 28, pCi/L \ / r ) 0.06 .t 0 *"' 0 -0.07 i PL ASANT VALLE EST TES 0 LEGEND '3°-'+:> ALLUVIAL WELL 0.05 2016 Th-230 CONC., pCi/L -500 CONTOUR AND LABEL -ALLUVIAL AQUIFER BOUNDARY HOMESTAKE MINING COMPANY GRANTS, NEIJ MEXICO -------------------

I I I I I I I I I I I I I I I I I I I APPENDIX G DOSE ASSESSMENT FOR SECTION 34 FLOOD IRRIGATION AREA G.O G.l G.2 G.3 G.4 G-1 G-2 G-3 G-4 G-5 APPENDIXG TABLE OF CONTENTS DOSE ASSESSMENT FOR SECTION 34 FLOOD IRRIGATION AREA Page Number INTRODUCTION

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.... G-1 METHODS ............................................................................................................

G-1 MODEL INPUT PAAAMETERS

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G-1 MODELING RES UL TS ..........................................................

.............................. G-3 CONCLUSION

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.......... G-4 FIGURES MAP OF LAND APPLICATION IRRIGATION PROJECT AREAS AND 2014 WIND ROSE (TOP), SCENARIO 1 RESRAD MODELING LAYOUT (BOTTOM LEFT), AND SCENARIO 2 RESRAD MODELING LAYOUT (BOTTOM RlGHT) ................

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G-5 SCENARIO 1 RESRAD MODELING RES UL TS -DOSE BY RADIONUCLIDE , ALL PATHWAYS SUMMED ..............................................................................

G-6 SCENARIO 1 RESRAD MODELING RESULTS -DOSE BY PATHWAY, ALL RADIONUCLIDES SUMMED ........................................................

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........ G-6 SCENARIO 2 RESRAD MODELING RESULTS -DOS E BY RADIONUCLIDE , ALL PATHWAYS SUMMED ...........................................................

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G-7 SCENARIO 2 RESRAD MODELING RESULTS -DOS E BY PATHWAY , ALL RADIONUCLIDES SUMMED .............................................................................

G-7 Grants R ecla mation Proj ec t G-i L a nd Application Imp act Assessmen t 1 1 I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I G.O Introduction This Appendix provides an assessment of potential radiological impacts to the public associated with land application irrigation activities , and includes modeling of doses for two conservative (worst-case) exposure scenarios, each involving the Section 34 flood irrigation area (approximately 120 acres) as the uranium concentrations in soils across this area averaged higher than other irrigation areas at the termination of the land application program. A summary presentation of modeling results are provided in Section 5.0 of the main Report. G.1 Methods Doses to a member of the public due to assumed maximum net (above background) soil concentrations of uranium and its decay products , along with radium-228 , were modeled using the RESRAD-OFFSITE computer code (ANL , 2016) (hereafter referred to as " RESRAD" for brevity) for a rural residential farming scenario (considered to be the most conservative plausible receptor scenario). Aerial imagery and shape files of land application irrigation fields were used to create two site-specific receptor scenario layouts in RESRAD for the Section 34 flood irrigation area as shown in Figure G-1. For Scenario 1 , it was assumed that the nearest resident resides just outside (and downwind relative the strongest prevailing wind directions) of the irrigated contamination zone (Figure G-1 ). Scenario 1 is conservatively representative of maximum potential exposure conditions during the history of the land application project. Scenario 2 is the most conservative receptor scenario as it assumes that in the future , a resident farmer establishes a dwelling at the center of the contaminated zone and cultivates crops entirely within the contamination zone (Figure G-2). G.2 Model Input Parameters Exposure/Do se Pathway s The dose pathways used for the RESRAD modeling included external gamma radiation , inhalation of air particulates and radon , dietary ingestion of plants , meat and well water , and incidental ingestion of soil. Although most local residents obtain municipal (treated) water for domestic use , the drinking water pathway was included as it is conceptually possible that somebody could use well water for domestic purposes (past , present or future). Milk and aquatic food pathways were not used as these pathways are unrealistic for the site-specific receptor s cenarios considered. Occupancy Factors Outdoor occupancy working in the contaminated zone for the resident farmer receptor was conservatively assumed to be 2 , 000 hour0 days <br />0 hours <br />0 weeks <br />0 months <br />s/yr (22.8% of the time). Indoor occupancy inside the resident farmer's dwelling was assumed to be the RESRAD default of 4 , 380 hour0.0044 days <br />0.106 hours <br />6.283069e-4 weeks <br />1.4459e-4 months <br />s/yr (50% of the time). Ten percent of the time was assumed to be spent away from the site, and the remainder was distributed between agricultural fields and time outdoors near the dwelling location.

G r a n ts R e clamation P rojec t G-1 L a nd Application Imp ac t A ssess m e nt Contaminated Zone Soil Parameters The 2012 surface soi I data for the four irrigated areas indicates that the Section 34 flood irrigation area had the highest average uranium co n centration in the top one-foot layer. The maximum concentration was 4.67 mg/kg , and the respective net (above background) concentration was 2.67 mg/kg (equiva l ent to a radiometric concentration of 1.81 pCi/g). This maximum net concentration (l .81 pCi/g) was used to determine the U-238 , U-234 and U-235 soil concentrations.

Uranium-238 and U-234 each account for 48.9% of the rad i oactivity i n natural uranium , while U-235 accounts for 2.2%. Using these natural isotopic abundances , the concentrations of U-238 , U-234 and U-235 in contaminated zone soils were calculated to be 0.89 pCi/g for U-238 and U-234 , and 0.04 pCi/g for U-235. For conservatism , these concentrations were assumed to occur uniformly in the upper 2 meters of the soil profi l e across the 120-acre contaminated zone (this is the default contaminated soil thickness in RESRAD). Since Th-230 , Ra-226 and Ra-228 were not measured in soil samples from the Sect i on 34 flood irrigation area , these values were calculated based on average concentrations measured i n the irrigation water app l ied using the following steady-state equation:

[ 226 Ra ti/ =I Rax 1/ . x Yo 4 x1x10-3 (Equation I) / P s01/

• Where: lR a = Concentration of radium in irrigation water , 0.2 picocuries per liter (pC/L) for Ra-226 and 1.0 pCi/L for Ra-228 p s oil = Density of soil using the RESRAD default of 1.5 g/cm 3 l x 10-3 =conversion factor ( cm 3 to liters) 0.4 = Primary soil porosity (RESRAD default) The resulting estimated steady-state soil concentrations as used in the model were as follows:

• Th-230 = 0.00006 pCi/g

• Ra-226 = 0.0003 pCi/g

• Ra-228 = 0.002 pCi/g Long-lived decay products of these radionuclides (half-lives greater than 6 months) were assumed to be in equilibrium with the indicated parent radionuclide.

RESRAD default values were used for all other physical or hydrological model parameters relating to soil characteristics.

Hydrological and Meteorological Parameters The average precipitation used for the modeling was 0.27 meters/yr (l 0.5 inches) based on site-specific meteoro l ogical station (MET) data. Irrigation applied to the contaminated zone was assumed to be 0.3 meters/y r. MET data from 2014 was used for atmospheric transport modeling in RESRAD in the form of a " Star File" joint frequency distribution, a three-dimensional array describing atmospheric wind direction , speed , and stability (This Star File was previously used G ran ts R ecla m a tion Proj ec t G-2 L a nd A ppl ica t i on Imp act Assess m e nt I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I for MILDOS modeling at the site in response to December 16 , 2015 Requests for Additional Information from HMC by the NRC). RESRAD default values were used for all other hydrological and meteorological model parameters.

Other Model Parameters RESRAD default values were used for all model input parameters not noted above. G.3 Modeling Results Receptor Scenario 1 Scenario 1 modeling result s are shown in Figures G-2 and G-3. Figure G-2 shows the total dose by radionuclide from all exposure pathways to the rural resident farmer living just outside , and generally downwind from , the contaminated zone (representative of the Section 34 flood irrigation area). The maximum total dose occurs at time zero (t = 0 years) and is exceedingly small (::::: 0.1 mrem/yr), subsequently decreasing as wind and water erosion gradually removes contaminated topsoil from the contamination zone. The largest contributor radionuclide to the total dose is U-328 , primarily from external gamma radiation (Figure G-3) associated with its short-lived Th-234 and Pa-234 decay products (half-lives ranging from approximately 1 minute to 24 days). The dose from ingestion of based foods and meat is only slightly higher than that from incidental ingestion of soil and inhalation of radionuclides in air particulates , all of which are negligible. Radon dose is essentially absent given the extremely low concentrations of Ra-226 introduced to so il by flood irrigation. Scenario 1 modeling results indicate that the ma xim um potential dose to any member of the public living adjacent to any of the land application areas during the period that irrigation was conducted (between 2000 and 2012) would have been insignificant relative to the operational public dose limit given in 10 CFR 20.1301 (100 mrem/y r). For further comparison, the average radiation dose to the U.S. population from exposure to natural background radiation sources, estimated at 320 mrem/yr. The maximum modeled dose received by the resident farmer (::::: 0.1 mrem/yr) is comparable to the average radiation dose to the public from cooking with natural gas. Receptor Scenario 2 Scenario 2 modeling results are shown in Figures G-4 and G-5. Figure G-4 s hows the total dose by radionuclide from all exposure pathways to the rural resident farmer living at the center of the contaminated zone (representative of the Section 34 flood irrigation area). The maximum total do se occurs at time zero (t = 0 years) and while this dose(:::::

0.3 mrem/yr) is about 3 times higher than results for Scenario 1 , this dose is still exceedingly small relative to average doses to the U.S. public from natural background radiation sources (approximately 320 mrem/yr). The largest contributor radionuclide to the total dose is U-328, primarily from external gamma radiation (Figure G-5) associated with its short-lived Th-234 and Pa-234 decay products (half-lives ranging from approximately 1 minute to 24 days). The dose from ingestion of based foods is more pronounced under Scenario 2 versus Scenario 1 , but again these doses are Grants Reclamation Proje c t G-3 Land Application Imp act As sess m e nt not significant.

Doses from incidental ingestion of soi l , inhalation of radionuclides m air particulates , and radon are negligible.

Scenario 2 modeling results indicate that the maximum potential dose to any future member of the public that may decide to build a dwelling within any of the land application areas and engage in sustenance farming would be insignificant relative to the dose limit for license termination and unrestricted future land use as given in 10 CFR 20.1402 (25 mrem/yr). G.4 Conclusion RESRAD-OFFSITE modeling results based on very conservative assumptions indicates that the radiological dose to any member of the public from irrigation under the land application program in the HMC Grants Reclamation Project area (2000 -2012) would have been negligible , and the future potential for radiological doses to any member of the public from residual byproduct radionuclides in soil in any land application area is insi gnificant relative to the public dose limit given in 10 CFR 20.130 I. Grants R ecla m a tion Proj ect G-4 Land Application Imp act Assessme nt I I I I I I I I I I 1 1 I I! I I I I I I I I I I I I I I I I I I I I I I I I Figure G-1: Map of land application irrigation project areas and 2014 wind rose (top), Scenario 1 RESRAD modeling layout (bottom left), and Scenario 2 RESRAD modeling layout (bottom right). Grant s R e c l a m ation Projec t G-5 Land App li ca ti on I mpact Assess m e n t

.. 0.0 9 0.08 0.07 0.06 i 0.05 0.0 4 0.03 0.02 0.01 0.00 .. \ r--_ ------r----.l. I----1-w--I------HI-----.... ..... :\ JO!' -0 100 200 300 400 500 Years 600 700 -B-Pb-2 1 0 -'fl-Ra-22C --* Th-228 -A-Po-2 10

• Ra-228 -t-230

• U-2 34 -+--U-235 . ---------.... .... .._ 800 900 -II-u-na -A-Toti.I Figure G-2: Scenario 1 RESRAD modeling results -dose by radionuclide, all pathways summed. 0.06 0.05 .. 0.04 :;... 0.03 E 0.02 0.01 0.00 * \ '--!-...-. -------._ _ .... _ .. :..;;,: -r --... t-_ ------.... -... .. -*---0 100 200 300 400 500 Years 600 700 800 900 -B-Direct radiation from soi {w 1terbome) + I ngestion of Fish -B-R..son { .... terbome) -A-Plon t (Wl te rbome) -'fl-M e.t {w a terborne) M (* .. aterl>ome) -II-RAdon (direct & a.irbome) --* Soil

{w 1terborne) -A-Pion! { rect & a.irbome) -f-W1ter -....-Meat { & airborne)

• Direct riid'1&tion from soi {cflf ect & utorne) {cfr ect & iiirborne) Soil ingestion

{dr ect & a irborne) Figure G-3: Scenario 1 RESRAD modeling results -dose by pathway, all radionuclides summed. Grants Reclamation Project G-6 Land Application Imp act Assessment

-.. J ) 1000 1000 I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I ... :>. 0.30 0.25 0.20 0.15 E 0.10 0.05 0.00 I r-.........

,..__ ______ ----------..._

r-----__

• 0 --.... ""' 1 00 200 1---.. --------.... ':'. ------------, .__ .... x -300 400 500 Years -..!... -----------.... .... ::I[ x 600 700 800 -e-A c-22.7 Pb-210 -V-JU.22(1 ""* Th-228 ..... U-23 4 -ti-U-2l8 + P a-2 31 -A-P o-210 + IU-228 -+-230 -+-U-2:!5 T o .. --x 900 F igure G-4: Scen ario 2 RESRAD modeling res u l t s -do s e b y r ad i onu clide, a ll p a thwa y s su mmed. ... :>. 0.20 0.15

• 0.10 I--. '-------r-.-.-.. IE 0.05 0.00 0 [-A-__ -----... -100 200 300 . --400 *-500 Years -"'II' -. --_-. 600 700 800 -e-Direct raaia t ion from soil {w at erborne} + {waterborM

} -ti-fa:lon {dir ec t & Ubome} + lng a tion of Fis *"" Soil

• estion { .. *>t e rbome) _...._ Plant { *ect & uborne) -B-Rmdon t .. a t erbome) -f-W*ta -.-I.I.at (dir ec t & ubome} -A-Plan t (wa t erborne} ..... Dir ec t from soil {di r ect & airborne) (dir ec t & airborne} -Alo 900 -V-ll u t { .. *a terbome} -+-l nn..lation Soil ingatJOn (d se c t & a irborne} Fi gure G-5: Sc ena rio 2 RESRAD modeling re s ults -do s e by pathway , all r ad i onuclide s su mmed. Grants R ec l a mati on Projec t G-7 Land App l i cat i on I mpact Assess m en t 1 000 -* 1 000