ML21076A454

Cimarron Environmental Response Trust Facility Decommissioning Plan, Revision 2, Appendix K - Compiled, Part 5

ML21076A454
Person / Time
Site:	07000925
Issue date:	02/26/2021
From:	Environmental Properties Management, Enercon Services, Burns & McDonnell Engineering Co, Veolia Nuclear Solutions Federal Services
To:	Office of Nuclear Material Safety and Safeguards, Cimarron Environmental Response Trust, NRC Region 4
Shared Package
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Attachment 4.2 - Time-Weighted Concentration Averaging Results Time Area Weighted Concentration Averaging - Nitrate 60% Water Treatment Design Input Total Area Year Contour Average (ug/L) Totals s . ft. 0 11 36 75 125 175 Actual Area 89,356 45,748 19,864 83,668 1 238,636.18 Wei hted Avera 523 817 724,043 6,275 063 84,863 54,477 8,931 2 148,269.81 GE-WAA-01 Wei 4,085 738 1,116,333 59,024 12,683 30,999 3 102,705.76 Wei 951 ,191 3,874,899 41,497 6,176 25,019 4 74,480.97 Wei 463 ,207 3,127,380 36,185 10,741 18,423 200,427 805,608 2,302,829 1,646 565 0 36 50 75 100 125 Totals s . ft.

90,034 57,108 33,686 607 85,857 710 268,000 s . ft.

1 268,000.40 Wei 653,882 1,227,837 30,326 6 439,262 71 044 31.43 ug/L 95,033 413 56,541 11 ,716 2 163,702.53 Wei 20,644 4,240,592 1,464,491

~ GE-WAA-02 0 62,424 12,891 32 ,709 I

3 108,024.73 iw I

4 138,714.89 Wei Wei 41,682 37,552 1,368,764 966,852 42 ,817 3,211 ,253 4,088,640 13,023 1,627,839 (9

..-- 59,945 16,568 1,170 0

I 603 902 87,728 i

w I

Totals S2, 0 11 23 36 75 100

_J (9 58,801 55,598 65,727 126,079 24,940 1 331 ,145.85

(_) Wei 636 602 2 395 765 9 455 917 2 493 996 0

I\ 141,541 165,079 90,194 25,113

, 2 421 ,926 .98 Wei 1 890 156 3 287 565 1 883 467 GE-WAA-03 i 3 448,628.73 Wei 139,900 270,858 3 101 329 13,527 493 068 18,623 1 396 740 5,720 571 987 92,197 334,451 16,380 25 4 443,052.43 Wei 3 829 462 1 228 490 2 522 172,797 0 11 36 75 Totals 47,387 73,199 50,692 18,922 1 190,199.96 Wei 838 124 1847735 1419181 63,610 22,181 17,011 20,351 2 123,153.34 Wei 253 975 620 049 1 526 319 GE-WAA-04 48,953 12,840 9,043 15,255 3 86,090.84 Wei 329 613 1 144 130 5,170 , 54.

4 61,903.91 Wei 188 435 896 612 5,581 15,636 203 439 1 172 664

Time Area-Weighted Concentration Averaging - Nitrate 60% Water Treatment Design Inputs

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Time Area-Weighted Concentration Averaging - Nitrate 60% Water Treatment Design Inputs

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NITRATE - U>DCGL Year 4 - SCENARIO A 50 mg/L WITH 22 .9 mg/L- Colored by Year NITRATE- U>DCGL Year 3 - SCENARIO A 50 mg/L WITH 22.9 mg/L- Colored by Year

Time Area-Weighted Concentration Averaging - Nitrate 60% Water Treatment Design Inputs Yeai r5 Ja 2 :J S(ft Omg/l NITRATE - U>DCGL Year 5 - SCENARIO A 50 mg/L WITH 22.9 mg/L- Colored by Year

.0 - Remediation Duration Estimates Remediation and Water Treatment Duration Estimate Calculations WAA U>DCGL (Alluvium/Transition Zone/SSB)

Uranium Table 1: Retardation Calculation Bulk Density Uranium Kd (g/ml) Porosity [n] 1 (ml/g) 2 Retardation [R]

1.81 0.3 2 13.07 Table 2: Remediation Pore Volume Calculation Average Remediation Area Remediation Area [A] Thickness [b] 3 Pore Volume (ft3 ) Pore Volume [PV]  ;

(ft2) Porosity [n]

1 '

(ft) [PV = b*n*A] (gallons) 2,834,531 0.3 19 16,156,827 120,853,064 Table 3: Estimated Initial Aqueous-Phase Contaminant Concentration Initial Aqueous-Phase Contaminant Concentration Concentration Basis (µg/L) Remarks Incremental Averaging of Concentrations within Average uranium concentration [see Iner. AWCA Calcs_Scenario A-2 Remediation Area 91.04 (10-26-20)] I Maximum Representative Concentration within Remediation Area 177.80 Representative uranium concentration for WELL T-62 Table 4a: Estimated Number of Pore Volumes to Achieve Remediation Goal (119 ug/L)

\ WAA U>DCGL - Ura mum.

Uranium Cleanup Initial Aqueous-Phase

~ ' Concentration Contaminant Concentration No. of Pore Volumes 6 C'0 E R (µg/L)4 (µg/L)s (#PV = -R ln(Cleanup/lnitial)] Remarks

-.=

w VI ' Pore volumes required to achieve cleanup goal (DCGL) and C:

0 13.07 119 178 5.2 discontinue remediation

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J 0 Table Sa: Estimated Time to Achieve Remediation Goal (119 ug/L)

....I

~ Pore Volume Flow Rate Flow Rate Duration Estimate Duration Estimate u

C No. of Pore Volumes (gallons) (gpm)7 (gpd) (days) (months) Remarks Time to achieve cleanup goal (DCGL) and 5.2 120,853,064 99 142,560 4,448 146.3 discontinue remediation .

12.19 Definitions: Notes:

ml - milliliters 1 Assumes 30% transmissive porosity for alluvial sand, as presented in the Technical Memorandum (TM002), September 10, 2018, page 3.

2 g- gram Kd derived from previous studies as mentioned in the Technical Memorandum (TM002), September 10, 2018, page 4.

ft 3 - cubic feet 3 Saturated zone thickness assumed to be 19 feet, as presented in the Technical Memorandum (TM002), September 10, 2018, page 5.

Kd - distribution coefficient 4 Remediation will be discontinued when the uranium groundwater concentration reaches 119 µg/L, the equivalent of 180 pCi/L as calcuated in Uranium Activity vs. Mass Concentration_Rev.

A (07 ug - microgram 18).xlsx pCi/L - picocuries per liter 5

L - liter The larger of the following is assumed as initial uranium concentration for estimating the groundwater remediation duration: (1) the maximum representative concentration reported for any well within gpm - gallons per minute the remediation area (determined using sampling results for monitoring events conducted from 2011 through Q2 2017), (2) the concentration estimated by conducting incremental averaging of gpd - gallons per day concentrations within the specified treatment area. The incremental averaging is performed using isopleth contours developed using representative groundwater concentrations for monitor wells located within the remediation area (see Iner. AWCA Calcs_Scenario A {10-14-20).xlsx ). Initial aqueous-phase contaminant concentrations will be variable.

DCGL - derived cleanup goal level MCL - maximum contaminant level 6 Number of pore volumes assumes linear, reversible and instantaneous sorption, and may result in an underestimation of cleanup timeframe estimates.

7 Flow rate is based on the nominal combined groundwater recovery rate for extraction wells GE-WAA-01 through GE-WAA-04.

- Remediation durations presented herein are estimates and do not account for all factors contributing to the actual time required to remediate plumes via groundwater injection and extraction. Estimates will be updated using system performance and groundwater monitoring data collected during the early stages of remedial operations.

Remediation and Water Treatment Duration Estimate Calculations BA1-B Area 83 ("U>DCGL" Alluvium)

Table 1: Retardation Calculation Bulk Density Uranium K,i (g/ml) Porosity [nl 1 (ml/gj2 Retardation [RI 1.81 0.3 2 13.07 Table 2: Remediation Pore Volume Calculation Average Plume Area of Plume [Al Thickness [bl 3 Pore Volume (tt3) Pore Volume [PVI (ft2) 1 Porosity [nl (ft) [PV = b*n*AI (gallons) 76,285 0.3 16 366,168 2,738,937 Table 3: Estimated Initial Aqueous-Phase Contaminant Concentration Initial Aqueous-Phase Contaminant Concentration Concentration Basis (µg/L) Remarks Incremental Averaging of Concentrations within Remediation Area 485.5 Average uranium concentration in Area B3 Maximum Representative Concentration within Remediation Area 3,516 .00 Representative uranium concentration for TMW-13 Table 4: Estimated Number of Pore Volumes to Achieve Remediation Goal (180 pCi/L)

Initial Aqueous-Phase Uranium Cleanup Contaminant I

Concentration Concentration No. of Pore Volumes 6 R (µg/L)4 (µg/L)s [#PV = -R ln(Cleanup/lnitial)I

' Remarks Pore volumes required to achieve cleanup goal 13.07 201 3,516.00 37.4 (DCGL).

Table 5: Estimated Number of Pore Volumes to Achieve MCL {30 µg/L)

Initial Aqueous-Phase Uranium Cleanup Contaminant Concentration Concentration No. of Pore Volumes 6 R (µg/L)4 (µg/L)s [#PV = -R ln(Cleanup/lnitial)] Remarks 13.07 30 3,516.00 62.2 Pore volumes required to achieve MCL.

Table 6: Estimated Time to Achieve Remediation Goal (201 µg/L)

Pore Volume Flow Rate Flow Rate Duration Estimate No. of Pore Volumes (gallons) (gpm)7 (gpd) Duration Estimate (days) (months) Remarks Time to achieve cleanup goal 37.4 2,738,937 66 95,040 1,078 35.5 (DCGL).

Table 7: Estimated Time to Achieve MCL (30 µg/L)

Pore Volume Flow Rate Flow Rate Duration Estimate No. of Pore Volumes (gallons) (gpm)7 (gpd) Duration Estimate (days) (months) Remarks 62.2 2,738,937 66 95,040 1,794 59.0 Time to achieve MCL.

Definitions: Notes:

ml - milliliters 1 Assumes 30% transmissive porosity for alluvial sand, as presented in the Technical Memorandum (TM002), September 10, 2018, page 3.

2 g - gram Kd derived from previous studies as mentioned in the Technical Memorandum (TM002), September 10, 2018, page 4.

ft 3 - cubic feet 3 Saturated zone thickness assumed to be 16 feet, as presented in the Technical Memorandum (TM002), September 10, 2018, page 5.

Kd - distribution coefficient 4 Remediation will be discontinued when the uranium groundwater concentration reaches 30 µg/L.

ug - microgram 5 The larger of the following is assumed as initial uranium concentration for estimating the groundwater remediation duration: (1) the maximum representative concentration reported for any well within the remediation area pCi/L - picocuries per liter (determined using sampling results for monitoring events conducted from 2011 through Q2 2017), (2) the concentration estimated by conducting incremental averaging of concentrations within the specified treatment area . The L - liter incremental averaging is performed using isopleth contours developed using representative groundwater concentrations for monitor wells located within the remediation area (see Iner. AWCA Calcs_Scenario A (10-14-20).xlsx ).

gpm - gallons per minute Initial aqueous-phase contaminant concentrations will be variable.

6 gpd - gallons per day Number of pore volumes assumes linear, reversible and instantaneous sorption, and may result in an underestimation of cleanup timeframe estimates.

DCGL- derived cleanup goal level 7Flow rate is based on the nominal combined groundwater recovery rate for extraction wells GE-BAl-02 through GE-BAl-04.

MCL - maximum contaminant level - Remediation durations presented herein are estimates and do not account for all factors contributing to the actual time required to remediate plumes via groundwater injection and extraction. Estimates will be updated using system performance and groundwater monitoring data collected during the early stages of remedial operations.

Remediatio n and Water Treatment Duration Estimate Calculation s BA1-C Area C3 ("U<DCGL " Alluvium)

Table 1: Retardation Calculation Bulk Density Uranium Kd \

(g/ml) 1 2 Porosity [n] (ml/g) Retardation [R]

1.81 0.3 2 13.07 Table 2: Remediation Pore Volume Calculation Average Plume Area of Plume [A] Thickness [b) 3 Pore Volume (ft3) Pore Volume [PV]

(ft2) Porosity [n] 1 (ft) [PV = b*n*A] (gallons) 96,627 0.3 19 550,774 4,119,789 Table 3: Estimated Initial Aqueous-Phase Contaminant Concentration Initial Aqueous-Phase Contaminant Concentration Concentration Basis (µg/L) Remarks Incremental Averaging of Concentrations within Average uranium concentration in Area C3 [see Iner.

Remediation Area 59.0 AWCA Cales Scenario A-2 (10-26-20))

Maximum Representative Concentration within Representative uranium concentration for 1361 Remediation Area 172.90 Note: 1361 is located within Area Bl.

Table 4: Estimated Number of Pore Volumes to Achieve Remediation Goal (180 pCi/L)

Initial Aqueous-Phase Uranium Cleanup Contaminant Concentration Concentration No. of Pore Volumes6 R (µg/L)4 (µg/L)s (#PV = -R ln(Cleanup/lnitial)] Remarks Pore volumes required to achieve cleanup goal 13.07 201 172.90 0.0 (DCGL) and discontinue remediation Table 5: Estimated Number of Pore Volumes to Achieve MCL (30 ug/L)

Initial Aqueous-Phase Uranium Cleanup Contaminant Concentration Concentration No. of Pore Volumes6 R {µg/L)4 (µg/L)s (#PV = -R ln(Cleanup/lnitial)] Remarks 13.07 30 172.90 22.9 Pore volumes required to achieve MCL.

Table 6: Estimated Time to Achieve Remediation Goal (201 µg/L)

Pore Volume Flow Rate Flow Rate Duration Estimate No. of Pore Volumes (gallons) (gpm)1 (gpd) Duration Estimate (days) (months) Remarks Time to achieve cleanup goal 0.0 4,119,789 20 28,800 0 0.0 (DCGL).

Table 7: Estimated Time to Achieve MCL (30 ug/L)

Pore Volume Flow Rate Flow Rate Duration Estimate No. of Pore Volumes (gallons) (gpm)7 (gpd) Duration Estimate (days) (months) Remarks Time to achieve MCL and 22.9 4,119,789 20 28,800 3,274 107.7 discontinue remediation.

Definitions: Notes:

ml - millil iters 1 Assumes 30% transmissive porosity for alluvial sand, as presented in the Technical Memorandum (TM002), September 10, 2018, page 3.

g - gram 2 Kd derived from previous studies as mentioned in the Technical Memorandum (TM002), September 10, 2018, page 4.

ft 3 - cubic feet 3 Saturated zone thickness assumed to be 19 feet, as presented in the Techn ical Memorandum (TM002),

September 10, 2018, page 5.

Kd - distribution coefficient 4 Remediation will be discontinued when the uranium groundwater concentration reaches 30 µg/L.

ug - microgram 5 The larger of the following is assumed as initial uranium concentration for estimating the groundwater pCi/L - picocuries per liter remediation duration: (1) the maximum representative concentration reported for any well within (determined using sampling results for monitoring events conducted from 2011 through Q2 2017), the remediation area L- liter (2) the concentration estimated by conducting incremental averaging of concentrations within incremental averaging is performed using isopleth contours developed using representative groundwater the specified treatment area. The gpm - gal lons per minute concentrations for monitor wells located within the remediation area (see Iner. AWCA Calcs_Scenari Initial aqueous-phase contaminant concentrations will be variable. o A (10-14-20).xls x ).

gpd - gallons per day 6 Number of pore volumes assumes linear, reversible and instantaneous sorption, and may result in an underestimation of cleanup timeframe estimates.

DCGL - derived cleanup goal level 7 Flow rate is based on the nominal combined groundwater recovery rate for extraction wel ls GE-BAl-08 and GE-BAl-09 .

MCL - maximum contaminant level - Remediation durations presented herein are estimates and do not account for all factors contributing to the actual time required to remediate plumes via groundwater injection and extraction. Estimates system performance and groundwater monitoring data collected during the early stages of remedial will be updated using operations.

Remediation and Water Treatment Duration Estimate Calculations BA1 -B Area B3R ("U>DCGL" Alluvium)

Table 1* Retardation Calculation Bulk Density Ura nium Kd 1

(g/ml) Porosity [nl (ml/g)2 Retardation [RI 1.81 0 .3 2 13.07 Table 2* Remediation Pore Volume Calculation Avera ge Plume Area of Plume (A) Thickness (b]3 Pore Volume (ft3) Pore Volume (PV]

(ft2)8 1 Porosity [nl (ft) [PV = b*n*AI (gallons) 172,912 0.3 16 829,978 6,208,232 Table 3: Estimated Initial Aqueous-Phase Contaminant Concentration Initial Aqueous-Phase Contaminant Concentration Area -weighted 83 Concentration Basis (µg/L) Re marks cone. @ t =0 Incremental Averaging of Concentrations within Average uranium concentration in Area B3 at remediation Remediation Area 0.0 time 't' 485.5 3 Maximum Representa t ive Concentration within Representati ve uranium concentration for TMW-13 at Remediation Area 0.59 remediation time 't' Tab le 4a: Est imated Number of Pore Volumes to Achieve Remediation Goal (180 pCi/L)

Uranium Cleanup Initial Aqueous-Phase No. of Pore Volumes 6

Concentration Contaminant Concentration [#PV = -R Days of Area B3R Days of Area B3 +

R (µg/L)4 (µg/L)5 ln(Cleanup/lnitial)I Remarks PV (liters) Q (liters/day) Remediation B3R Remediation 13.07 201 0.59 0.0 Pore volumes required to achieve cleanup goal (DGCL) and 23502309.7 33841015475 0 3,274 cubic foot = 28.3168 liters Table Sa : Estimated Time t o Achieve Remediation Goa l (180 pCi/L) liters per day= 5451 gallons per min .

Pore Volume Flow Rate Flow Rate Duration Estimate No. of Pore Volumes (gallons) (gpm)1 (gpd) Duration Estimate {days) (months) Remarks Time to achieve cleanup goal {DGCL) and 0.0 6,208,232 86 123,840 0 0.0 discontinue remediation .

Table 4b: Estimated Number of Pore Volumes to Achieve Remediation Goal (30 ug/L)

Uranium Cleanup Initial Aqueous-Phase No. of Pore Volumes 6

.l!!

ro Concentration Contaminant Concentration [#PV"' -R

-w~E R (µg/L)4 {µg/L)s ln(Cleanup/lnitial)I Remarks C: 13.07 30 0.59 0.0

.g Pore volumes required to achieve MCL.

ro

5 Table Sb: Estimated Time to Achieve Remediation Goal (30 ug/L) 0

~

u Pore Volume Flow Rate Flow Rate

~ Duration Estimate No. of Pore Volumes (gallons) (gpm)1 (gpd) Duration Estimate (days) (months) Remarks 0.0 6,208,232 86 123,840 0.0 0.0 Time to MCL and discontinue remediation.

Definitions: Notes:

ml - milliliters 1 Assumes 30% transmissive porosity for alluvial sand, as presented in the Technical Memorandum {TM002), September 10, 2018, page 3.

g- gram 2 Kd derived from previous studies as mentioned in the Technical Memorandum {TM002), September 10, 2018, page 4 .

ft 3 - cubic feet 3 Saturated zone thickness assumed to be 16 feet, as presented in the Technica l Memorandum (TM002), September 10, 2018, page 5.

Kd - distribution coefficient 4 Remediation will be discontinued when the uran ium groundwater concentration reaches 30 µg/L.

ug - microgram 5 The larger of the following is assumed as initial uranium concentration for estimating the groundwater remediation duration: (1) the maximum representative concentration reported pCi/L - picocuries per liter for any well within the remediation area (determined using sampling results for mon itoring events conducted from 2011 through Q2 2017), (2) the concentration estimated by conducting incremental averaging of concentrations within the specified treatment area. The incremental averaging is L - liter performed using isopleth contou rs developed using representative groundwater concentrations for monitor wells located within the remediation area (see Iner. AWCA Calcs_Scenario A (10-14-20).xlsx ). Initial aqueous-phase contaminant concentrations will be variable.

gpm - gallons per minute gpd - gallons per day 6 Number of pore volumes assumes linear, reversible and instantaneous sorption, and may resu lt in an underestimation of cleanup timeframe estimates.

7 DCGL- derived cleanup goal level Flow rate is based on the nominal combined groundwater recovery rate for extraction wells GE- BAl-02 through GE-BAl-04.

MCL - maximum contaminant level 8rhe total capture area and PV will be larger when wells 1-4 are pumping at 86 gpm and wells 5 & 6 are idle; however, the pore volume used in this calculation is limited to the area exceeding 30 ug/L. Although concentration s in Areas Band C wi ll be below 30 ug/L at the t ime B3R begins, this is consistent with previous calculations .

- Remediation durations presented herein are estimates and do not account for all factors contributing to the actual time required to remediate plumes via groundwater injection and extraction . Estimates will be updated using system performance and groundwater monitoring data collected du ring the early stages of remed ial operati ons.

.1 - Initial & Maximum Influent Concentrations Initial Influent Concentrations 60% Water Treatment Design Input ImIuent 1-Iow A0JUStea weIgntea Remediation Extractio n Rate Flow Rate Nitrate Uranium Fluoride Nitrate Weighted Weighted Area Well/Trench (gpm) (gpm) (mg/L) (ug/L) (mg/L) (mg/L) Uranium (ug/L) Fluoride (mg/L) q q*% Cmax q *Cmax Comments:

Governing Assumptions:

Western Area

-Maximum nitrate concentrations will increase throuah vear 5. Maximum uranium and fluoride concentrations for oumoina wells and trench will occur at time

-- - Initial Influent Concentration: Linear, incremental concentration averaging along trench alignment using isoconcentration contours (see Iner. TWCA 38.60 304 .00 7.03 308.80 2,432 .00 56 .26 Cales Scenario A-2 (10-26-20) and WA - INF Cone. Cales - N tab below].

1206-NORTH GETR-WU-02 - Maximum Influent Concentration: [SSB/TZ/Alluvium] GETR-WU-02 capture zone area-weighted incremental concentration averaging using

-- 38 .60 304 .00 7.03 308.80 2,432 .00 56 .26 isoconcentration contours (see Iner. AWCA Calcs_Scenario A-2 (10-26-20)]. Nitrate concentration from year with highest TWCA concentration (see Iner.

8 TWCA Cales Scenario A-2 (10-26-20) and WA- INF Cone. Cales - N tab below] .

-- 31 .52 - Initial Influent Concentration : Uran ium interpolated concentrati ons calculated in Surfer (see Iner. AWCA Calcs_Scenario A-2 (10-26-20)]. Nitrate 134.18 1.40 788 .00 3,354.50 35.00 concentrations from vear 1 [see Iner. TWCA Cales Scenario A /10-26-20) and WA - INF Cone. Cales - N tab belowl.

GE-WAA-01 - Maximum Influent Concentration: [SSB/TZ/Alluvium] GE-WAA-01 capture zone area-weighted incremental concentration averaging using isoconcentration

-- 58 .72 134.18 1.40 1,468.00 3,354.50 35.00 contours (see Iner. AWCA Calcs_Scenario A-2 (10-26-20)] . Nitrate concentration from year with highest TWCA concentration (see Iner. TWCA 25 Cales Scenario A /10-26-20) and WA - INF Cone. Cales - N tab belowl.

-- - Initial Influent Concentration: Uranium interpolated concentrations calculated in Surfer (see Iner. AWCA Calcs_Scenario A-2 (10-26-20)]. Nitrate 31.43 163.44 2.62 942.90 4,903.20 78.60 concentrations from vear 1 [see Iner. TWCA Cales Scenario A-2 /10-26-20) and WA - INF Cone. Cales - N tab below1.

GE-WAA-02 - Maximum Influent Concentration: [SSB/TZ/Alluvium] GE-WAA-02 capture zone area-weighted incremental concentration averaging using isoconcentration

-- 46.80 163.44 2.62 1,404 .00 4 ,903 .20 78.60 contours (see Iner. AWCA Calcs_Scenario A-2 (10-26-20)]. Nitrate concentration from year with highest TWCA concentration (see Iner. TWCA 30 Cales Scenario A-2 /10-26-20\ and WA - INF Cone. Cales - N tab below1.

WAA U>DCGL

-- - Initial Influent Concentration: Uranium interpolated concentrations calculated in Surfer (see Iner. AWCA Calcs_Scenario A-2 (10-26-20)]. Nitrate 67 .13 162.85 3.41 1,611 .12 3,908.40 81 .84 concentration interoolated from Surfer rsee Iner. AWCA Cales Scenario A-2 /10-26-20\l and WA - INF Cone. Cales - N tab belowl .

GE-WAA-03 - Maximum Influent Concentration: [SSB/TZ/Alluvium] GE-WAA-03 capture zone area-weighted incremental concentration averaging using isoconcentration

-- 67 .13 162.85 3.41 1,611 .12 3,908.40 81 .84 contours (see Iner. AWCA Calcs_Scenario A-2 (10-26-20)] . Nitrate concentration from year with highest TWCA concentration (see Iner. TWCA 24 Cales Scenario A-2 /10-26-20\ and WA - INF Cone. Cales - N tab below1.

-- - Initial Influent Concentration: Uranium interpolated concentrations calculated in Surfer (see Iner. AWCA Calcs_Scenario A-2 (10-26-20)]. Nitrate 21.58 119.03 1.44 431.60 2,380.60 28 .80 concentrations from vear 1 fsee Iner. TWCA Cales Scenario A-2 (10-26-20) and WA - INF Cone. Cales - N tab below].

GE-WAA-04 - Maximum Influent Concentration: [SSB/TZ/Alluvium] GE-WAA-04 capture zone area-weighted incremental concentration averaging using isoconcentration

-- 21.58 119.03 1.44 431.60 2,380.60 28.80 contours (see Iner. AWCA Calcs_Scenario A-2 (10-26-20)]. Nitrate concentration from year with highest TWCA concentration [see Iner. TWCA 20 Cales Scenario A-2 /10-26-20\ and WA - INF Cone. Cales - N tab belowl.

Initial Lq*cmax 107 0 4,082.42 16,978 .70 280 .50 Initial 1q 107.00 107.00 107.00 Initial Influent Concentration 38 .15 158.68 2.62 Burial Area 1 Governing Assumptions:

- Maximum uranium influent concentrations for all extraction wells and trenches will occur at time zero.

BA1-A GETR-BA1-01 7 -- -- 1,360.00 -- -- 9,520.00 -- - Linear, incremental concentration averaoinQ alonQ trench alionment usinQ isoconcentration contours see Iner. AWCA Cales Rev. C (12-17-19).

GETR-BA1-02 7 -- -- 2,080 .00 -- -- 14,560.00 -- - Linear incremental concentration averaoino alono trench alionment usino isoconcentration contours see Iner. AWCA Cales Rev. C (12-17-19).

GE-BA1-02 24 -- -- 2,420.00 -- -- 58,080.00 -- - Interpolated concentrations calculated in Surfer see Iner. AWCA Cales Rev. C (12-17-19 BA1 -B GE-BA1 -03 18 -- -- 430.00 -- -- 7,740.00 -- - Interpolated concentrations calcu lated in Surfer see Iner. AWCA Cales Rev. C 12-17-19 GE-BA1-04 24 -- -- 389.00 -- -- 9,336.00 -- - Interpolated concentrations calcu lated in Surfer see Iner. AWCA Cales Rev. C 12-17-19 BA1-C GE-BA1-05 10 -- -- 168.00 -- -- 1,680.00 -- - Interpolated concentrations calculated in Surfer see Iner. AWCA Cales Rev. C 12-17-19 GE-BA1-06 10 -- -- 88 .60 -- -- 886.00 -- - Interpolated concentrations calculated in Surfer see Iner. AWCA Cales Rev. C 12-17-19 Lq*cmax 100 -- 101 ,802 .00 --

Jq -- 100.00 --

Max Influent Concentration -- 1,018.02 --

Notes:

gpm - gallons per minute mg/L - milligrams per liter SSA - Sandstone A SSA - Sandstone B TZ - Transition Zone ug/L - micrograms per liter Page 1 of 1

.2 - Nitrate Influent Concentrations by Year Average Nitrate Concentration by Year 60% Water Treatment Design Inputs lntluent t-lOW A0JUStea vveIgntea Remediation Extraction Rate Flow Rate Nitrate Nitrate Area (gpm) (gpm) Year (mg/L) (mg/L)

Well/Trench q q*o/o Ct q*Ct Comments:

-1mt1a1 1nt1uent {;oncentrat1on: Linear, incremental concentration averaging along trench aIIgnment using IsoconcentratIon contours 1 38.60 308 .80 [see Iner. AWCA Calcs_Scenario A-2 (10-26-20).

-- 2 -- --

1206-North GETR-WU-02 8 -- 3 -- -- - Maximum Influent Concentration: Nitrate concentration from year with highest TWCA concentration [see Iner. TWCA Cales -

-- 4 -- -- Scenario A-2 (10-26-20).

-- 5 -- --

-- 1 31 .52 788.00 - Initial Influent Concentration: Nitrate concentrations from year 1 [see Iner. TWCA Cales - Scenario A-2 (10-26-20).

-- 2 35.09 877.25 GE-WAA-01 25

-- 3 46.99 1,174.75 - Maximum Influent Concentration: Nitrate concentration from year with highest TWCA concentration [see Iner. TWCA Cales -

-- 4 52.41 1,310.25 Scenario A-2 (10-26-20).

-- 5 58.72 1,468.00

-- 1 31.43 942.90 - Initial Influent Concentration: Nitrate concentrations from year 1 [see Iner. TWCA Cales - Scenario A-2 (10-26-20).

-- 2 34.98 1,049.40 GE-WAA-02 30 -- 3 46.80 1,404.00 - Maximum Influent Concentration: Nitrate concentration from year with highest TWCA concentration [see Iner. TWCA Cales -

-- 4 45.05 1,351 .50 Scenario A-2 (10-26-20).

WAA U > DCGL -- 5 10.18 305.40

-- 1 67.13 1,611 .12 - Initial Influent Concentration: Nitrate concentration interpolated from Surfer.

-- 2 16.74 401 .76 GE-WAA-03 24 -- 3 12.40 297.60 - Maximum Influent Concentration: Nitrate concentration from year with highest nitrate concentration [see Iner. TWCA Cales -

-- 4 11.42 274.08 Scenario A-2 (10-26-20) .

-- 5 7.08 169.92

-- 1 21.58 431.60 - Initial Influent Concentration: Nitrate concentrations from year 1 [see Iner. TWCA Cales - Scenario A-2 (10-26-20).

-- 2 19.49 389.80 GE-WAA-04 20 -- 3 18.83 376.60 - Maximum Influent Concentration: Nitrate concentration from year with highest TWCA concentration [see Iner. TWCA Cales -

-- 4 18.92 378.40 Scenario A-2 (10-26-20) .

-- 5 20.43 408.60 Initial Lq*Ct 107 0 4,082.42 Initial Lq 107.00 Initial Influent Concentration 38.15 Notes:

gpm - gallons per minute mg/L - milligrams per liter ug/L - micrograms per liter

.3 - Western Area Treatment Duration Analysis Western Area Treatment Duration Analysis 60% Water Treatment Design Input 12/7/2020 WATF - Uranium Time Required for lsC; Time Required for Combined Combined Influent representative Flow Initial Cone. to Influent Cone. to Reach C; C; Cmax Cmax of Cmax? Rate PV1 PV Q Reach Max. Level C1 c, MCL Remediation Area ( µg/L) Source ( µg/L) Source (Y/N) (gpm) R1 (ft3) (liters) (liters/day) (days) 2 ( µg/L) ( µg/L) (months)

WAA U>DCGL (GE-WAA-01 through GE-WAA-04) 147 FWCA 147 FWCA y 99 13.1 16,156,827 457,509 ,639 539 ,648 0 97.3 1206-NORTH (GETR-WU-02) 304 LWCA 304 LWCA y 8 97.3 N/A 50.4 3,014 85,334 43,608 0 0.00 combined Treatment System lnfl uent Flow Rate* 107 WATF - Nitrate Time Required for Is C; Initial Cone. Combined representative to Reach Max. Influent C; C; C2 C3 Cs Cmax Cmax of Cmax? Flow Rate PV2 PV Q Level c, (mg/L) Source C1 Remediation Area (mg/L) (mg/L) C4 (mg/L) (mg/L) (mg/L) Source (Y/N) (gpm) R2 (ft3) (liters) (liters/day) (days) (mg/L) (mg/L)

WAA U>DCGL (GE-WAA-01 through GE-WAA-04) 38.1 FWCA 27 33 33 24 38.1 FWCA y 99 4.62 23,452,057 664,087,208 539,648 0 18.29 1206-NORTH (GETR-WU-02) 38.6 FWCA -- -- -- - 38.6 FWCA y 18.29 8 10.9 3,014 85,334 43,608 0 0.00 Combined Treatment System In fluent Flow Rate 107 WATF - Fluoride lsC; representative C; C; Cmax Cmax Of Cmax?

Remediation Area (mg/L) Source (mg/L) Source (Y/N)

IWAA U>DCGL (GE-WAA-01 through GE-WAA-04) 2.3 FWCA 2.3 FWCA y 1206-NORTH (GETR-WU-02) 7.03 LWCA 7.03 LWCA y

.-( (-Q/(PV*R))t Ct- oe cubic foot= 28.3168 liters gpm = 5451 liters per day Notes:

C; - initial concentration C1- final concentration Cmax - maximum concentration gpm - gallons per minute MCL - maximum contaminant level mg/L - milligrams per liter R - retardation PV - pore volume Q -flow rate AWCA - Area-weighted concentration averaging FWCA - Flow rate-weighted concentration averaging LWCA - Linear-weighted concentration averaging SIC - Surfer-interpolated concentration 1

Retardation (R) and pore volume (PV) taken from [Remediation Duration Estimates - Scenario A-2 (11-3-20)]. To more accurately represent influent concentration calculations, the remediation area was as the area for PV calculations.

2 Retardation (R) and pore volume (PV) for nitrate taken from [Decay Analysis Pore Volumes - Scenario A-2 (11-3-20)) . Total area of capture zone used to calculate PV. This pore volume is not representative of the capture zone for associated with Years 1 through 4; however, pore volume is not used to determine influent concentration for Years 1 through 3 and the difference in pore volume between Years 4 and 5 PV is negligible.

Page 1 of 1

.4 - Western Area Nitrate Decay Analysis Western Area Nitrate Influent Concentration Analysis 12f7/2020 60% Water Treatment Design Input Western Area Combined Influent - Nitrate WAA U>DCGL (GE-1206-NORTH (GETR-WAA-01 through GE-WU-02)

Area WAA-04) c, (mg/L) 38.12 38.60 C2 (mg/L) 27.46 -

C3 (mg/L) 32.86 -

c.

(mg/L) 33.48 -

Cs (mg/L) 23.76 -

Flow Rate (gpm) 99 8 It 4.6 10.9 PV (liters) 664 ,087 ,208 85,334 Q r -C (-Q/(PV*R))t (liters/day) 539,648 43,608 ""t- oe Time Required for Initial Cone. to Reach Max. Level (months) 0 0 Combined Cumulative Time WEIGHTED Influent Flow (Months) 1 WAAU>DCGL 38.117374 1206-NORTH 9.239573 AVERAGE 35.96 Rate I

107.00 II Months 1'

Days 30.4 Notes 2 38.117374 2.211651 35.43 107.00 2 60.8 3 38.117374 0.529397 35.31 107.00 3 91.3 4 38.117374 0.126720 35.28 107.00 4 121 .7 5 38.117374 0.030333 36.27 107.00 5 152.1 6 38.117374 0.007261 35.27 107.00 6 182.5 7 38.117374 0.001738 36.27 107.00 7 212.9 8 38.117374 0.000416 35.27 107.00 8 243.4 9 38.117374 0.000100 36.27 107.00 9 273 .8 10 38.117374 0.000024 35.27 107.00 10 304.2 11 38.117374 0.000006 35.27 107.00 11 334.6 12 14 38.117374 27.456667 0.000001 0.000000 35.27 25.40 107.00 I

107,00 "

12 14 365.0 425.9 15 27.456667 0.000000 25.40 107.00 15 456.3 16 27 .456667 0.000000 25.40 107.00 16 486.7 17 27.456667 0.000000 25.40 107.00 17 51 7.1 18 27.456667 0.000000 25.40 107.00 18 547.6 19 27.456667 0.000000 25.40 107.00 19 578.0 20 27.456667 0.000000 25.40 107.00 20 608.4 21 27.456667 0.000000 25.40 107.00 21 638.8 22 27.456667 0.000000 25.40 107.00 22 669.2 23 27.456667 0.000000 -25.40 . 107.il0 23 699.7 24 27.456667 0.000000 25.40 107.00 24 730.1

• e; 1111111 I

• I I 26 32.858081 0.000000 30.40 107.00 26 790.9 27 32.858081 0.000000 30.40 107.00 27 821.3 28 32.858081 0.000000 30.40 107.00 28 851 .8 29 32.858081 0.000000 30*_40 107.00 29 882.2 30 32.858081 0.000000 30.40 107.00 30 912.6 31 32.858081 0000000 30.40 107.00 31 943 .0 32 32.858081 0.000000 30.40 107.00 32 973.4 33 32.858081 0.000000 30.40 107.00 33 1003.9 34 32.858081 0.000000 30.40 107.00 34 1034.3 35 32.858081 0.000000 30.40 107.00 35 1064.7 36 32.858081 0.000000 30.40 107.00 36 1095.1 1 11 I I ti ,. -.. ,_

38 33.298427 ' 0 .000000 30.81 107.00 38 1156.0 39 33.120736 0.000000 30.64 107.00 39 1186.4 40 32.943993 0 .000000 30.48 107.00 40 1216.8 41 32.768194 0.000000 30.32 107.00 41 1247.2 42 32.593332 0.000000 30.16 107.00 42 1277.6 43 32.41 9404 0.000000 30.00 107.00 43 1308.1 44 32.246404 0.000000 29.84 107.00 44 1338.5 45 32.074327 0.000000 29.68 107.00 45 1368.9 46 31.903168 0 000000 29.52 107.00 46 1399.3 47 31.732923 0.000000 29.36 107.00 47 1429.7 48 31.563586 0.000000 1111111 29.20

• I 107.00

' ' II ..

48 1460.2

• • • • ,. I .,

50 31.227618 0 000000 31.23 99.00 50 1521 .0 51 31. 060978 0.000000 31.06 99.00 51 1551 .4 52 30.895227 0.000000 30.90 99.00 52 1581 .8 53 30.730360 0.000000 30.73 99.00 53 1612.3 54 30.566373 0000000 30.57 99.00 54 1642.7 55 30.403262 0.000000 30.40 99.00 55 1673.1 56 30.241020 0.000000 30.24 99.00 56 1703.5 57 30.079645 0.000000 30.08 99.00 57 1733.9 58 29.919130 0.000000 29.92 99.00 58 1764.4 -

59 29.759472 0.000000 29.76 99.00 59 1794.8 60 29.600667 0.000000 29.60 99.00 60 1825.2 61 29.442708 0.000000 Z9.44 99.00 61 1855.6 62 29.285593 0.000000 29.29 99.00 62 1886.0 63 29.129315 0.000000 29.13 99.00 63 1916.5 64 28.973872 0.000000 28.97 99.00 64 1946.9 65 28.819259 0.000000 28.82 99.00 65 1977.3 66 28.665470 0.000000 28.67 89.00 66 2007.7 67 28.512502 0.000000 28.51 99.00 67 2038.1 68 28.360350 0.000000 28.36 99.00 68 2068.6 69 28.209011 0.000000 28.21 99.00 69 2099 .0 70 28.058478 0.000000 28.06 99.00 70 2129.4 71 27.908750 0.000000 27.91 99.00 71 2159 .8 72 27.759820 0.000000 27.76 99.00 72 2190 .2 73 27.611685 0.000000 27.61 99.00 73 2220.7 74 27.464340 0.000000 27.46 99.00 74 2251 .1 75 27.317782 0.000000 27.32 99.00 75 2281.5 76 27.172005 0.000000 27.17 99.00 76 2311.9 77 27 .027007 0.000000 27.03 99.00 77 2342.3 1 of2

Western Area Nitrate Influent Concentration Analysis 1217/2020 60% Water Treat ment Design Input Western Area Combined Influent* Nitrate WM U>DCGL (GE-1206-NORTH (GETR-WM--01 through GE-wu--021 Area WM--04) c, (mg/L) 38.12 38.60 c,

(mg/L) 27.46 -

c, (mg/L) 32.86 -

c, (mg/L) 33.48 -

c, (mg/L) 23.76 -

Flow Rate (gpm) 99 8 R 4.6 10.9 PV (liters) 664,087,208 85,334 Q -( (-Q/(PV*R))t (litersldayl 539,648 43 ,608 Ct- oe Time Required for Initial Cone. to Reach Max. Level (monthsl 0 0 Combined Cumulative Time WEIGHTED Influent Flow (Monthsl WM U>DCGL 1206-NORTH AVERAGE Rate Months Days Notes 78 26.882782 0.000000 26.88 99.00 78 2372.8 79 26.739327 0.000000 26.74 99.00 79 2403.2 80 26.596638 0.000000 26.60 99.00 80 2433.6 81 26.454710 0.000000 26.45 99.00 81 2464.0 82 26.313539 0.000000 26.31 99.00 82 2494.4 83 26.173122 0.000000 26.17 99.00 83 2524.9 84 26.033454 0.000000 26.03 99.00 84 2555.3 85 25.894531 0.000000 25.89 99.00 85 2585.7 86 25.756350 0.000000 25.76 99.00 86 2616.1 87 25.618906 0.000000 25.62 99.00 87 2646.5 88 25.482196 0 000000 25.48 99.00 88 2677.0 89 25.346215 0.000000 25.35 99.00 89 2707.4 90 25.210959 0.000000 25.21 99.00 90 2737.8 91 25.076426 0.000000 25.08 99.00 91 2768.2 92 24.942610 o 000000 24.94 99.00 92 2798.6 93 24.809508 0 .000000 24.81 99.00 93 2829.1 94 24.677117 0 .000000 24.68 99.00 94 2859.5 95 24.545432 0 .000000 24.55 99.00 95 2889.9 96 24 .414450 0 .000000 24.41 99.00 96 2920.3 97 24.284167 0 .000000 24.28 99.00 97 2950.7 98 24.154579 0.000000 24.15 99.00 98 2981.2 99 24.025682 0.000000 24.03 99.00 99 3011.6 100 23.897474 0.000000 23.90 99.00 100 3042.0 101 23.769949 0.000000 23.77 99.00 101 3072.4 102 23.643 106 0.000000 23.64 99.00 102 3102.8 103 23.516938 0.000000 23.52 99.00 103 3133.3 104 23.391445 0.000000 23.39 99.00 104 3163 .7 105 23.266621 0.000000 23.27 99.00 105 3194.1 106 23.142463 0.000000 23.14 99.00 106 3224.5 107 23.018967 0.000000 23.02 99.00 107 3254.9 108 22.896131 0.000000 22.90 99.00 108 3285.4 109 22 .773950 0.000000 22.77 99.00 109 3315.8 110 22 .652421 0.000000 22.65 99.00 110 3346.2 111 22.531540 0.000000 22.53 99.00 111 3376.6 112 22.411305 0.000000 22.41 99.00 112 3407.0 113 22.291711 0000000 22.29 99.00 113 3437.5 114 22 .172756 0 .000000 22.17 99.00 114 3467.9 115 22 .054435 0.000000 22.05 99.00 11 5 3498.3 116 21 .936746 0.000000 21.94 99.00 116 3528.7 117 21.819684 0.000000 21.82 99.00 117 3559.1 118 21 .703247 0.000000 21.70 99.00 118 3589.6 119 21.587432 0.000000 21.59 99.00 119 3620.0 120 21.472235 0.000000 21.47 99.00 120 3650.4 121 21.357652 0.000000 21.3& 99.00 121 3680.8 122 21.243681 0.000000 21.24 99.00 122 3711 .2 123 21.130318 0.000000 21.13 99.00 123 3741 .7 124 21.017560 0.000000 21 .02 99.00 124 3772.1 125 20.905404 0.000000 20.91 99.00 125 3802.5 126 20.793846 0.000000 20.79 99.00 126 3832.9 127 20.682884 0.000000 20.68 99.00 127 3863.3 128 20.572513 0.000000 20.57 99.00 128 3893.8 129 20.462732 0.000000 20.46 99.00 129 3924.2 130 20.353536 0.000000 20.35 99.00 130 3954.6 131 20.244923 0.000000 20.24 99.00 131 3985.0 132 20.136890 0.000000 20.14 99.00 132 4015.4 133 20.029433 0.000000 20.03 99.00 133 4045.9 134 19.922550 0.000000 19.92 99.00 134 4076 .3 135 19.816237 0.000000 19.82 99.00 135 4106 .7 136 19.710491 0.000000 19.71 99.00 136 4137.1 137 19.605310 0.000000 19.61 99.00 137 4167 .5 138 19.500690 0.000000 19.50 99.00 138 4198 .0 139 19.396628 0.000000 19.40 99.00 139 4228 .4 19.293122 0.000000 140 4258.8 140 141 19.1 90167 0.000000

- 19.29 1!1.19 99.00 99.00 141 4289.2 142 19.087763 0.000000 19.09 99.00 142 4319 .6 143 18.985904 0 .000000 18.99 99.00 143 4350.1 144 18.884590 0.000000 18.88 99.00 144 4380 .5 145 18.783815 0.000000 18.78 99.00 145 4410 .9 146 18.683579 0.000000 18.68 99.00 146 4441.3 147 18.583878 0.000000 18.58 99.00 147 4471.7 148 18.484708 0.000000 18.48 99.00 148 4502 .2 149 18.386068 0.000000 18.39 99.00 149 4532 .6 150 18.287954 0.000000 18.29 99.00 150 4563 .0 2 of 2

12/7/2020 Western Area Uranium Influent Concentration Analysis 60% Water Treatment Design Input Western Area Combined Influent - Uranium WAA U>DCGL (GE-1206-NORTH (GETR-WAA-01 through GE-WU-02)

Area WAA-04) c, (1,19/L) 146.94 304.00 Cmu

( 1,19/L) 146.94 304.00 Flow Rate (gpm) 99 8 R 13.1 50.4 PV (liters) 457 ,509 ,639 85,3 34 Q -( (-Q/(PV*R))t (liters/day) 539 ,648 43 ,608 Ct- oe 1,me Kequ,rea Tor Initial Cone. to Reach MaK. Level (months) 0 0 Cumulative Time (Months) WAAU>DCGL 1206-NORTH AVERAGE Rate Days Notes 0 146 .936364 304.000000 158.68 0 .0 1 146 .533426 223.266349 152.27 30.4 2 146.131593 163.973233 147.47 60.8 145.730862 120 .426662 143.84 91 .3 145.331231 88.444806 141.08 121 .7 144 .535251 141.394693 141.006952 2.965643 15 456.3 16 140.620274 2 .178054 16 486.7 17 140.234657 1.599625 17 517.1 18 139.850097 1.174811 18 547.6 19 139.466591 0.862815 129.10 19 578.0 20 139.084138 0.633676 128.73 20 608.4 21 138.702733 0.465390 128.37 21 638.8 22 138.322374 0.341796 128.01 22 669.2 23 137.943058 0.251 025 127.65 23 699.7 24 137.564782 0 .184360 127.29 24 730.1 25 137.187544 0 .135399 126.94 25 760.5 26 136.811340 0 .099441 126.59 26 790.9 27 136.436168 0 .073032 126.24 27 82 1.3 28 136.062024 0.053637 125.89 28 85 1.8 29 135.688907 0.039393 125.55 29 882 .2 30 135.316813 0.028931 125.20 30 912 .6 31 134 .945739 0 .021248 124.86 31 943.0 32 134.575683 0.015605 124.52 32 973.4 33 134.206641 0.011461 124.17 33 1003.9 34 133.8386 12 0 .008417 123.83 34 1034.3 35 133.471591 0 .006182 123.49 35 1064.7 36 133.105578 0.004540 123.15 36 1095.1 37 132 .740568 0 .003334 122.82 37 1125.5 38 132 .376558 0 .002449 122.48 38 11 56.0 39 132 .013548 0 .001799 122.14 39 1186.4 40 131.651532 0.00132 1 121.81 40 121 6.8 41 131.290509 0 .000970 121.47 41 1247.2 42 130 .930477 0.000712 121.14 42 1277.6 43 130 .571431 0.000523 43 1308.1 44 130.2 13370 1338.5 45 0.000000 0.000000 126.338918 0.000000 56 125.992464 0.000000 56 1703.5 57 125.646960 0.000000 57 1733.9 58 125 .302403 0.000000 58 1764.4 59 124.958792 0.000000 59 1794.8 60 124.616122 0.000000 124.62 60 1825.2 61 124.274392 0 000000 124.27 61 1855.6 62 123.933600 0.000000 123.93 62 1886.0 63 123.593741 0.000000 123.59 63 1916.5 64 123 .254815 0.000000 123.25 64 1946.9 65 122.91 681 9 0.000000 122.92 65 1977.3 66 122 .579749 0 000000 122.58 66 2007.7 67 122.243603 0.000000 122.24 67 2038.1 68 121 .908379 0.000000 121.91 68 2068.6 69 121 .574075 0. 000000 121.57 69 2099.0 70 121 .240687 0 .000000 121.24 70 2129.4 71 120 .908214 0 .000000 120.91 71 2159.8 72 120.576652 0 .000000 120.58 72 2190.2 73 120 .246000 0.000000 120.25 73 2220.7 74 119.916254 0 000000 119.92 74 2251 .1

Western Area Uranium Influent Concentration Analysis 12/7/2020 60% Water Treatment Design Input Western Area Combined Influent - Uranium WM U>DCGL (GE-1206-NORTH (GETR-WAA-01 through GE-WU-02)

Area WAA-04\

C;

(µg/L) 146.94 304.00 Cm.,

( 119/L) 146.94 304.00 Flow Rate (gpm) 99 8 R 13.1 50.4 PV (liters) 457,509 ,639 85,334 Q -( (-Q/(PV*R))t (liters/dayl 539,648 43 ,608 Cr oe 1,me Kequ,rea tor Initial Cone. to Reach Max. Level (months) 0 0 Cumulative Time WEIGHTED (Months) WAAU>DCGL 1206-NORTH AVERAGE Rate Months Days Notes 75 119 .587412 0 .000000 119.59 75 2281 .5 76 119.259473 0.000000 119.26 76 2311 .9 77 118.932432 0.000000 118.93 77 2342.3 78 118.606288 0.000000 118.61 78 2372 .8 79 118.281039 0.000000 11B.28 79 2403.2 80 117.956682 0.000000 117.96 80 2433.6 81 117.633214 0 000000 117.63 81 2464.0 82 117.310633 0 000000 117.31 82 2494.4 83 116.988937 0.000000 116.99 83 2524.9 84 116.668123 0.000000 116.67 84 2555.3 85 116.348189 0.000000 116.35 85 258 5.7 86 116.029132 0.000000 116.03 86 2616 .1 87 115.710950 0.000000 115.71 87 2646.5 88 115.393640 0 000000 115.39 88 2677.0 89 115.077201 0.000000 115.08 89 2707.4 90 114.761629 0.000000 114.76 90 2737.8 91 114.446923 0 000000 114.45 91 2768.2 92 114.133080 0.000000 114.13 92 2798.6 93 113 .820097 0.000000 113.82 93 2829.1 94 113.507973 0.000000 113.51 94 2859.5 95 113.196704 0.000000 113.20 95 2889.9 96 112.886290 0.000000 112.89 96 2920.3 97 112.576726 0.000000 112.58 97 2950.7 98 112.268012 0.000000 112.27 98 2981.2 99 111 .960143 0.000000 111 .96 99 3011.6 100 111 .653120 0.000000 111 .65 100 3042.0 101 111 .346938 0.000000 111 .35 101 3072.4 102 111 .041596 0.000000 111 .04 102 31 02.8 103 110.737091 0.000000 110.74 103 3133.3 104 110.433421 0.000000 110.43 104 3163. 7 105 110.130584 0 000000 11 0.13 105 3194.1 106 109.828577 0.000000 109.83 106 3224.5 107 109 .527398 0.000000 109.53 107 3254.9 108 109 .227046 0.000000 109.23 108 3285.4 109 108.927517 0.000000 108.93 109 3315.8 110 108 .628809 0.000000 108.63 11 0 3346.2 111 108 .33092 1 0.000000 108.33 111 3376.6 112 108 033849 0.000000 108.03 112 3407.0 113 107.737593 0.000000 107.74 113 3437.5 114 107.442148 0.000000 107.44 11 4 3467.9 115 107 .147514 0.000000 107.15 115 3498.3 116 106.853687 0.000000 . 106.85 116 3528.7 117 106.560667 0.000000 106.56 117 3559.1 118 106.268450 0.000000 106.27 118 3589.6 119 105 .977034 0.000000 105.98 11 9 3620.0 120 105.686418 0.000000 105.69 120 3650.4 121 105.396598 0.000000 105.40 121 3680 .8 122 105.107573 0.000000 105.11 122 3711.2 123 104.819341 0.000000 104.82 123 374 1.7 124 104.531899 0.000000 104.53 124 3772.1 125 104.245245 0.000000 104.25 125 3802. 5 126 103.959378 0.000000 103.96 126 3832.9 127 103.674294 0.000000 103.67 127 3863.3 128 103.389992 0.000000 103.39 128 3893.8 129 103 .106470 0 000000 103.11 129 3924.2 130 102 .823725 0. 000000 102.82 130 3954.6 131 102.541756 0. 000000 102.54 131 3985.0 132 102.260560 0.000000 102.26 132 4015.4 133 101 .980135 0.000000 101.98 133 4045.9 134 101.700479 0.000000 101.70 134 4076.3 135 101.421590 0.000000 101.42 135 4106.7 136 101 .143465 0 000000 101 .14 136 4137.1 137 100.866104 0.000000 100.87 137 4167.5 138 100.589503 0. 000000 100.59 138 4198.0 139 100.313660 0.000000 100.31 139 4228.4 140 100.038574 0 000000 100.04 140 4258.8 141 99.764242 0.000000 99.76 141 4289.2 142 99.490663 99.49 142 431 9 .6 143 99.217833 99.22 143 4350.1 144 98.945752 98.95 144 4380.5 145 98.674417 98.67 145 4410.9 146 148 98.403826 97.864869 0.000000 0.000000 98.40 146 148 4441 .3 4502.2

~ ~

149 97.596498 0.000000 149 4532.6 150 97.328863 0.000000 150 4563.0

.0 - BA1 Uranium Analysis BA1 Influent Concentra tion Analysis 60% Water Treatment Design Input 12/7/2020 BA1 - Uranium Is C; Time Required for Time Required for Combined Combined Influent representat ive C; Initial Cone. to Reach Influent C; Cmax C max Of Cmax? Flow Rate PV2 Cone. to Reach PV Q Max. Level C 1 months Ci@ 150 Months Remediatio n Area (µg/L) Source ( µg/L) Source (Y/N) R2 MCL (gpm) (tt3) (liters) (liters/day) (days) ( µg/L) ( µg/L) (months)

BA1-A1 (GETR-BA1-01 & GETR-BA1-02) 1,720.0 FWCA 1,720.0 FWCA y 14 50 90,021 2,549,098 BA1-B3 (GE-BA1-02 through GE-BA1-04) 76,314 0 114 1,138.7 FWCA 1,138.7 FWCA y 66 13 366,168 10,368,706 359,765 0 BA1-B3R (GE-BA1-02 through GE-BA1-04) 1 1 0.19 12.4 AWCA 12.4 AWCA y 16.1 118 86 13 366,168 10,368,706 468,785 BA1-C3 (GE-BA1-05 & GE-BA1-06) 0 0.15 128.3 FWCA 128.3 FWCA y 20 13 550,774 15,596,157 109,020 0 Combined Treatment System Influent Flow Rate 22.13 100 Cc-(oe (-Q/(PV*R))t cubic foot= 28.3168 liters gpm 5451 liters per day Notes:

C; - initial concentratio n C 1 - final concentratio n Cmax - maximum concentratio n gpm - gallons per minute MCL - maximum contaminant level ug/L - micrograms per liter R - retardation PV - pore volume Q - flow rate AWCA - Area-weight ed concentratio n averaging FWCA - Flow rate-weighte d concentratio n averaging 1

lnitial concentratio n for Area 83R equals final concentratio n for Area 83. Calculation of PV for BA 1 are based on 30 ug/L contour lines. The PV used for Area 83R will be larger than value used here, due to increased pumping capacity of wells 1-4 upon discontinuat ion of Area C3. However, Area 83 PV was used as an estimate, as no areas will exceed 30 ug/L when Area C3 is discontinued .

2 Retardation (R) and pore volume (PV) taken from remediation duration estimate calculations [Remediatio n Duration Estimates - Scenario A (10-22-20)] .

BA1 Uranium Influent Concentration Analysis 60% Water Treatment Design Input 12/7/2020 BA1 Combined Influent - Uranium IBA1-A1 (Gt:IK-BA1-01 lt:IAl-BJ ll.:it:-t:IAl-02 IBA1 -t:l;jK ll.:it:-t:IAl-02 lt:IAl-CJ ll.:it:-t:IAl-05 &

Area & GETR-BA1-02) through GE-BA1-04) through GE -BA1-04) GE-BA1-06) c,

( µg/L) 1,720.0 1,138.7 12.4 128.3 Cmax

( µg/L) 1,720.0 1,138.7 12.4 128.3 Flow Rate (gpm) 14 66 86 20 R

50.4 13.1 13.1 13.1

.-v (liters) C -c (-Q/(PV*R))t Q

2,549,098 10,368,706 10,368,706 15,596 ,157 c oe (liters/day) 76,314 359,765 468,785 109,020 Area (ft2)

-- 76,285 172 ,912 96,627 11me KequIred for Initial Cone. to Reach Max. Level (months) 0 0 0 0 ug/L Months Days Months Days Cumulative Time Combinea (Months) A BJ 83R CJ WEIGHTED Influent Flow (for A11B3/C3 AVERAGE Rate Areas) (for B3R Area) 0 1,720.000 1,138.727 Notes 128.300 1,018 .02 100 1 1,689.200 1,050.361 126.229 954.97 100 1 30.42 2 1,658 95 1 968.852 124 .191 896.53 100 2 60.84 3 1,629.244 893.668 122.187 842.35 100 3 91.26 4 1,600.068 824.319 120 .214 792.10 100 4 121 .68 -

5 1,571 416 760.351 118 .274- 745 .48 100 5 152.10 -

6 1,543.276 701 .347 116 .365 702 .22 100 6 182 .52 7 1,515640 646.922 114.486 662.06- - 100 8 1,488.499 7 2 12.94 596.720 112 .638 624.75 100 9 1,461.845 8 243.36 550.414 110 .820 590.10 100 9 273.78 10 1,435 667 507.702 109.031 557.88__ 100 10 304.20 11 1,409.958 468 .303 107.271 527.93 100 11 334.62 12 1,384 .710 431 .963 105.540 500.06 100 12 365.04 13 1,359 914 398.442 103.836 -

474.13 100 13 395.46 14 1,335 .56 1 367 .523 102 .160 449.98 100 14 425.88 15 1,311.645 339.002 100.511 427.47 100 15 456.30 16 1,288.157 312 .696 98.889 406.50 100 16 486.72 17 1,265.090 288.430 97.292 386.93 100 17 517.14 18 1,242 436 266 .048 95.722 368.68 100 18 547.56 19 1,220 .187 245.402 94.177 351 .63 100 19 577 .98 20 1,198.337 226 .359 92.657 335.70 100 20 608.40 21 1,176.878 208 .793 91 .161 320.80 100 21 638.82 22 1,155.804 192 .591 89.689 306.86 100 22 669.24 23 1,135.106 177.645 88.242 293 .81 100 23 699.66 24 1,114 780 163.860 86.817 281 .58 100 24 730.08 25 1,094.817 151 .144 85.416 270.11 100 25 760.50 26 1,075.212 139.415 84.037 259.35 100 26 790.92 27 1,055.958 128 .597 82.681 249.24 100 27 821 .34 28 1,037 .049 118.617 81 .346 239.74 100 28 851 .76 29 1,018.478 109.413 80.033 230.81 100 29 882.18 30 1,000.240 100.922 78.741 222.39 100 30 91 2.60 31 982.329 93.090 77.470 214.46 100 31 943.02 32 964.738 85.866 76.220 206.98 100 32 973.44 33 947.462 79.203 74.989 199.92 100 33 1,003.86 34 930.496 73.057 73.779 193,24 100 34 1,034 .28 35 913.833 67.388 72.588 186.93 100 35 1,064.70 36 897.469 62.158 71.416 180,95 100 36 1,095.12 37 881.398 57.335 70.263 175.29 100 37 1,1 25.54 38 865.614 52.886 69.129 169.92 100 38 1,1 55.96 39 850 .114 48.782 68.013 164.81 100 39 1,186.38 40 834.890 44.996 66.915 159.97 100 40 1,216.80 41 819.940 41.504 65.835 155.35 100 41 1,247.22 42 805.257 38.284 64.773 150.96 100 42 1,277.64 43 790.837 35.313 63.727 146,77 100 43 1,308.06 44 776.675 32.572 62.698 142.77 100 44 1,338.48 45 762 .767 30.045 61 .686 138.95 100 45 1,368.90 46 749 .108 27.713 60.691 135.30 100 46 1,399.32 47 735 .694 25.563 59.711 131 .81 100 47 1,429.74 48 722 .520 23.579 58.747 128.46 100 48 1,460.16 49 709 .581 21 .749 57.799 125.26 100 49 1,490.58 50 696 .875 20.062 56.866 122.18 100 50 1,521 .00 51 684.396 18.505 55.948 119.22 100 51 1,551.42 52 672.140 17.069 55.045

- 116.37 100 52 1,581 .84 53 660.104 15.744 ~ 113.64 100 53 1,612.26 -

54 648.283 14.522 53.282 111 .00 100 54 1,642.68 55 636.674 13.395 52.422 108.46 100 55 1,673.10 56 625.273 12.356 51 .576 106.01 100 56 1,703.52 57 614 076 11 .397 50.743 103.64 100 57 1,733.94 58 603.080 10.513 49.924 ~ -35 100 58 1,764.36 59 592 .281 9.697 49.118 99.14 100 59 1,794.78 60 581 .674 8.944 48.325 97.00 100 60 1,825.20 61 571 .258 8.250 47.545 94.93 100 61 1,855.62 62 561 029 7.610 46.778 92.92 100 62 1,886.04 63 550.982 7.020 46.023 90.97 100 63 1,916.46 64 541 .116 6.475 45.280 89.09 100 64 1,946.88 65 531.426 5.972 44.549 87.25 100 65 1,977.30 66 521 .909 5.509 43.830 85.47 100 66 2,007.72 67 512 .564 5.081 43.122 83.74 100 67 2,038.14 68 503.385 4.687 42.426 82.05 100 68 2,068.56 69 494.371 4.323 41.742 80.41 100 69 2,098.98 70 485.518 3.988 41 .068 78.82 100 70 2,129.40 71 476.824 3.678 40.405 77.26 100 71 2, 159.82 72 468.285 3.393 39.753 75.75 100 72 2,190.24 1 of 3

BA1 Uranium Influent Concentration Analysis 60% Water Treatment Design Input 1217/2020 BA1 Combined Influent - Uranium CAl*A1 \'-'Cl~*CAI-VI CAl*l:IJ \'-'C-DAI-U~ *CAI-U~ CAl*\;J \\>C*C>AI-V<> &

Area & GETR-BA1 -02) through GE-BA1--04) through GE-BA1-04) GE-BA1-06) c,

( µg/L) 1,720.0 1,138.7 12.4 128.3 Cmax

( µg/L) 1,720.0 1,138.7 12.4 128.3 Flow Rate (gpm) 14 66 86 20 R

50.4 13.1 13.1 13.1 C -c l'V (liters) (-Q/(PV*R))t Q

2,549 ,098 10,368,706 10,368,706 15,596,157 t- oe (liters/day) 76,314 359,765 468 ,785 109,020 Area (ft2)

-- 76,285 172 ,912 96,627 IIme t-<equ,rea ror Initial Cone. to Reach Max. Level (months) 0 0 0 0 ug/L Months Days Months Days Cumulative Time combined A BJ B3R CJ WEIGHTED Influent Flow (for A1/B3/C3 (Months)

AVERAGE Rate Areas) (for B3R Area) Notes 73 459.899 3.130 39.111 74.27 100 73 2,220.66 74 451 .664 2.887 38.480 72.83 100 74 2,251.08 75 443.576 2.663 37.858 71 .43 100 75 2,281.50 76 435.633 2.456 37.247 70.06 100 76 2,311.92 77 427.832 2.266 36.646 68.72 100 77 2,342 .34 78 420.170 2.090 36.055 67.41 100 78 2,372.76 79 412 .646 1.928 35.473 66 .14 100 79 2,403.18 80 405 .257 1.778 34.900 64.89 100 80 2,4 33.60 81 398 .000 1.640 34.337 63.67 100 81 2,464.02 82 390.873 1.513 33.782 62.48 100 82 2,494.44 83 383 .873 1.395 33.237 61.31 100 83 2,524.86 84 376.999 1.287 32.701 60.17 100 84 2,555.28 85 370.248 1.187 32.173 59.05 100 85 2,585.70 86 363 .618 1.095 31 .653 57 .96 100 86 2,6 16 .12 87 357.107 1.010 31 .142 56.89 100 87 2,646.54 88 350 .712 0.932 30.640 55.84 100 ----

88 2,676.96 89 344.432 0.859 30.145 54.82 100 -

89 2,707.38 90 338.264 0.793 29.659 53.81 100 90 2,737.80 91 332.207 0.731 29.180 52.83 100 91 2,768.22 92 326.258 0.674 28.709 51.86 100 92 2,798.64 93 320.415 0.622 28.245 50.92 100 93 2,829.06 94 314 .678 0.574 27.789 49.99 100 94 2,859.48 95 309.043 0.529 27.341 49.08 100 95 2,889.90 96 303 .509 0.488 26.900 48.19 100 96 2,920.32 97 298 .074 0.450 26.465 47.32 100 97 2,950.74 98 292.736 0.415 26.038 46.46 100 98 2,981.16 99 287.494 0.383 25.618 45.63 100 99 3,011 .58 100 282 .346 0 .353 25.204 44.80 100 100 3 ,042.00 101 277.290 0.326 24.798 44.00 ,- 100 101 3 ,072.42 102 272.324 0.301 24.397 43.20 100 102 3 ,102.84 103 267.448 0 .277 24.003 42.43 100 103 3,133.26 104 262.658 0.256 23.616 41.66 100 104 3,163.68 105 257.955 0 .236 23.235 40.92 100 105 3,194.1 0 106 253.336 0 .218 22.860 40.18 100 106 3,224.52 -

107 248.799 0.201 22.491 39.46 109' 239.968 11.204 43.23 100 100 I

107 3,254.94 109 3,315.78 1 30.42 110 235.671 10.084 41 .67 100 110 3,346.20 2 6 0.84 111 231.451 9.077 40.21 100 111 3,376.62 3 91 .26 112 227.306 8.170 38.85 100 112 3,407.04 4 121.68 113 223 .236 7.354 37.58 100 113 3,437.46 5 152 .10 114 219.238 6 .619 36.39 100 114 3,467.88 6 182 .52 115 215.312 5.958 35.27

- - - 100 115 3,498.30 7 212.94 116 211.457 5.363 34.22

- - - 100 11 6 3,528.72 8 243.36 117 207 .670 4.827 33.22 -

100 11 7 3,559.14 9 273.78 118 203.951 4.345 32.29 100 118 3,589.56 10 304.20 119 200.299 3.911 31.40 100 119 3,619.98 11 334.62 120 196.712 3.520 30.57 100 120 3,650.40 12 365.04 121 193.190 3.168 29.77 100 121 3,680.82 13 395.46 122 189 .730 2.852 29.01 100 122 3,71 1.24 14 425.88 123 186.333 2.567 28.29 100 123 3,741 .66 15 456.30 124 182.996 2.310 27.61 100 124 3,772.08 16 486.72 125 179.719 2.080 26.95 100 125 3,802 .50 17 517.14 126 176.501 1.872 26.32 100 126 3,832 .92 18 547.56 127 173.340 1.685 25.72 100 127 3,863.34 19 577.98 128 170.236 1.516 25.14 100 128 3,893.76 20 608.40 129 167.188 1.365 24.58 100 129 3,924.18 21 638.82 130 164.194 1.229 24.04 100 130 3,954.60 22 669.24 131 161.254 1.106 23]3 - 100 131 3,985.02 23 699.66 132 158.366 0.995 23.03 100 132 4,015.44 24 730.08 133 155.530 0.896 22.54 100 133 4,045.86 25 760.50 134 152.745 0.806 22.08

- 100 134 4,076.28 26 790.92 135 150.010 0.726 21 .63 - -

100 135 4 ,1 06.70 27 821 .34 136 147.323 0 .653 21 .19 100 136 4,137.12 28 851 .76 -

137 144.685 0.588 20.76 100 137 4,167.54 29 882.18 138 142.094 0.529 20.35 100 138 4 ,1 97.96 30 912.60 139 139.550 0.476 19.95 100 139 4,228.38 31 943.02 140 137.051 0.429 19.56 100 140 4 ,258.80 32 973.44 141 134 .597 0.386 19.18 100 141 4,289.22 33 1,003.86 142 132 .187 0.347 18.80 100 142 4,319.64 34 1,034.28 143 129.819 0.313 18.44 100 143 4,350.06 35 1,064.70 144 127.495 0.281 18.09 100 144 4,380.48 36 1,095.12 145 125.212 0.253 17.75 100

- - - - 145 4,410.90 37 1,1 25.54 146 122 .969 0.228 17.41 100 146 4,441.32 38 1,1 55.96 2 of 3

BA1 Uranium Influent Concentration Analysis 60% Water Treatment Design Input 12/7/2020 BA1 Combined Influent - Uranium lt>Al-A1 (<>Cll"<-t>A1-01 t>Al-B3 \bC-t>Al-02 lt>RI-ClJt< \\>C-ORl-02 lt>RI-(.;J \\>C-OR i-11:, &

Area & GETR-BA1-02) through GE-BA1-04) through GE-BA1-04) GE-BA1-06)

C;

( µg/L) 1,720.0 1,138.7 12.4 128.3 Cmax

( µg/L) 1,720.0 1,138.7 12.4 128.3 Flow Rate (gpm) 14 66 86 20 R

50.4 13.1 13.1 13.1 C -c r-v (liters) (-Q/(PV*R))t 2,549,098 10,368,706 10,368 ,706 15,596,157 t- oe Q

(liters/day) 76,314 359,765 468 ,785 109,020 Area (ft')

-- 76,285 172 ,912 96,627 l ,me Required for Initial Cone. to Reach Max. Level (months) 0 0 0 0 ug/L Months I Days Months I Days Cumulative Time vomDmed A 83 B3R C3 WEIGHTED Influent Flow (for A1183/C3 (Months)

AVERAGE Rate Areas) (for 83R Area) Notes 147 120.767 0.205 147 I 4,471 .74 17.08 100 39 I 1,186.38 148 118.605 0.185 16.76 100 148 I 4,502 .1 6 40 I 1,2 16.80 149 116.481 0.166 16.45 100 II 149 I 4,532 .58 41 I 1,247.22 3 of 3

.0-Western Area, BA1 Combined Nitrate Effluent Analysis Western Area, BA1 Effluent Analysis 12/7/2020 60% Water Treatment Design Input BA1, Western Area - Nitrate Combined Is Ci representative Combined Effluent Combined Effluent 1

Ci Ci Cmax Cmax of Cmax? PV PV Ci Cmax Remediation Area (mg/L) Source (mg/L) Source (Y/N) R1 (ft3) (liters) (mg/L) (mg/L)

BA1-A1 (GETR-BA1-01 & GETR-BA1-02) 0 -- 0 -- -- 50 90,021 2,549,098 BA1-83 (GE-BA1-02 through GE-BA1-04) 0 -- 0 -- -- 13 366,168 10,368,706 BA1-B3R (GE-BA1-02 through GE-BA1-04) 0 -- 0 -- -- 13 366,168 10,368,706 20.87 20.87 BA1-C3 (GE-BA1-05 & GE-BA1-06) 0 -- 0 -- -- 13 550,774 15,596,157 WAA U>DCGL (GE-WAA-01 through GE-WAA-04) 38.12 FWCA 38.12 FWCA y 4.62 23,452,057 664,087,208 1206-NORTH (GETR-WU-02) 38.60 FWCA 38.60 FWCA y 10.87 3,014 85,334 cubic foot=

C -(

28 .3168 liters

(-Q/(PV*R))t t- oe gpm 5451 liters per day Notes:

Ci - initial concentration Cmax - maximum concentration gpm - gallons per minute mg/L - milligrams per liter R - retardation PV - pore volume FWCA - Flow rate-weighted concentration averaging 1

Retardation (R) and pore volume (PV) taken from [Decay Analysis Pore Volumes - Scenario A-2 (11-3-20)].

Western Area, BA1 Effluent Concentration Analysis 60% Water Treatment Design Input 12/7/2020 Western Area, BA1 Combined Effluent - Nitrate WAA U>DCGL (GE- BA1 Q Re- WAQ-1206-NORTH (GETR-Area WAA-01 through GE- BA1 Injection Reinjection WU-02)

WAA-04) loom) loom)

C1 (mg/L) 38.12 38.60 0.00 C2 (mg/L) 27.46 .. 0.00 C3 (mg/L) 32.86 .. 0.00 18 8 C4 (mg/L) 33.48 -- 0.00 Cs (mg/L) 23.76 -- 0.00 Flow Rate (gpm) 99 8 100 R:

4.6 10.9 r-v (liters) 664 ,087,208 85,334 Q

(liters/day) 539 ,648 43 ,608 C -c (-Q/(PV*R))1 t- oe 11me KequIrea ror Initial Cone. to Reach Max. Level (months) 0 0 cumulative Time wn;;1unlCU Dl\l*VYI\

(Months)

I 1

WAA U>DCGL 38 .117374 1206-NORTH

• o1I I I I I 9.239573 AVERAGE 35.96 Combined 19.67 Months I

1 Days 30.4

- . Notes 2 38 .117374 2.211651 35.43 19.38 2 60 .8 3 38 .117374 0.529397 35.31 19.31 3 91 .3 4 38 .117374 0.126720 35.28 19.30 4 121 .7 5 38.117374 0.030333 35.27 19.29 5 152.1 6 38.117374 0.007261 35.27 19.29 6 182.5 7 38 .117374 0.001738 35.27 19.29 7 212.9 8 38 .117374 0.000416 35.27 19.29 8 243.4 9 38.117374 0.000100 35.27 19.29 9 273.8 10 38 .117374 0.000024 35.27 19.29 10 304 .2 11 38 .117374 0.000006 35.27 19.29 11 334 .6 12 38.117374 0.000001 35.27 19.29 12 365 .0 13 27 456667 0 000000 25.40 13.89 13 395 5 Year2 Cone 14 27.456667 0.000000 25.40 13.89 14 425 .9 15 27.456667 0.000000 25.40 13.89 15 456 .3 16 27.456667 0.000000 25.40 13.89 16 486.7 17 27.456667 0.000000 25.40 13.89 17 517.1 18 27.456667 0.000000 25.40 13.89 18 547.6 19 27.456667 0.000000 25.40 13.89 19 578 .0 20 27.456667 0.000000 25.40 13.89 20 608 .4 21 27.456667 0.000000 25.40 13.89 21 638.8 22 27.456667 0.000000 25.40 13.89 22 669.2 23 27.456667 0.000000 25.40 13.89 23 699.7 24 27.456667 0.000000 25.40 13.89 24 730.1 25 I 32 858081 0 000000 30 .40 16.63 25 760 5 Year 3 Cone 26 32.858081 0.000000 30.40 16.63 26 790.9 27 32.858081 0.000000 30.40 16.63 27 821 .3 28 32.858081 0.000000 30.40 16.63 28 851 .8 29 32.858081 0.000000 30.40 16.63 29 882.2 30 32 .858081 0.000000 30.40 16.63 30 912 .6 31 32.858081 0.000000 30.40 16.63 31 943 .0 32 32.858081 0.000000 30.40 16.63 32 973 .4 33 32.858081 0.000000 30.40 16.63 33 1003.9 34 32.858081 0.000000 30.40 16.63 34 1034.3 35 32.858081 0.000000 30.40 16.63 35 1064.7 36 32.858081 0.000000 30.40 16.63 36 1095.1 37 I 33 477071 j 0 000000 I 30 .97 16.94 37 1125.5 Year 4 Cone .. Reset tot= O 38 33 .298427 0.000000 30.81 16.85 38 1156.0 39 33 .120736 0.000000 30.64 16.76 39 1186.4 40 32 .943993 0.000000 30.48 16.67 40 1216.8 41 32.768194 0.000000 30.32 16.58 41 1247.2 42 32.593332 0.000000 30.16

• 16.49 42 1277.6 43 32 .419404 0.000000 30.00 16.41 43 1308.1 44 32.246404 0.000000 29.84 16.32 44 1338.5 45 32.074327 0.000000 29.68 16.23 45 1368.9 46 31.903168 0.000000 29.52 16.15 46 1399.3 47 31.732923 0.000000 29.36 16.06 47 1429.7 48 31.563586 0.000000 29.20 15.97 48 1460.2 1 of 4

Western Area, BA1 Effluent Concentration Analysis 12n,2020 60% Water Treatment Design Input Western Area, BA1 Combined Effluent - Nitrate WAA U>DCGL (GE- BA1 Q Re- WAQ-1206-NORTH (GETR-Area WAA-01 through GE- BA1 Injection Re injection WU-02)

WAA-04) faom) loom) c, (mglL) 38.12 38.60 0.00 C2 (mglL) 27.46 -- 0.00 C3 (mglL) 32.86 .. 0.00 18 8 C4 (mglL) 33.48 .. 0.00 Cs (mglL) 23.76 -- 0.00 Flow Rate (gpm) 99 8 100 t(

4.6 10.9 r"V (liters) 664,087,208 85,334 a

(Iiterslday) 539,648 43,608 C -c (-Q/(PV*R))1 c oe Time RequIrea tor Initial Cone. to Reach Max. Level (months) 0 0 cumulative Time CIAl*VVA (Months) 50

. WAA U>DCGL 31.227618 1206-NORTH lI I I I I I 0.000000 AVERAGE

, I 31,23 Combined 17.08 Months 50 Days 1521 .0 Notes I

51 31.060978 0.000000 31.06 16.99 51 1551 .4 52 30 .895227 0 000000 30.90 16.90 52 1581 .8 30.730360 53 0.000000 30.73 16.81 53 1612.3 54 30.566373 0.000000 30.57 16.72 54 1642.7 55 30.403262 0.000000 30.40 16.63 55 1673.1 56 30 .241020 0 000000 30.24 16.54 56 1703.5 57 30.079645 0.000000 30,08 16.45 57 1733.9 58 29.919130 0.000000 29.92 16.36 58 1764.4 59 29.759472 0.000000 29.76 16.28 59 1794 .8 60 29.600667 0.000000 29.60 16.19 60 1825.2 61 29.442708 0.000000 29.44 16.10 61 1855.6 62 29.285593 0.000000 29.29 16.02 62 1886.0 63 29.129315 0.000000 29.13 15.93 63 1916 .5 64 28.973872 0 000000 28.97 15.85 64 1946.9 65 28.819259 0.000000 28.82 15.76 65 1977.3 66 28.665470 0.000000 28.67 15.68 66 2007.7 67 28.512502 0.000000 28.51 15.60 67 2038.1 68 28.360350 0.000000 28.36 15.51 68 2068.6 69 28.209011 0.000000 28.21 15.43 69 2099.0 70 28 058478 0.000000 28.06 15.35 70 2129.4 71 27.908750 0.000000 27.91 15.27 71 2 159.8 72 27.759820 0 000000 27.76 15.18 72 2 190.2 73 27.611685 0.000000 27.61 15.10 73 2220.7 74 27.464340 0.000000 27.46 15.02 74 2251 .1 75 27.317782 0.000000 27.32 14.94 75 2281 .5 76 27.172005 0.000000 27.17 14.86 76 2311 .9 77 27.027007 0.000000 27.03 14.78 77 2342.3 78 26.882782 0.000000 26.88 14.70 78 2372.8 79 26 .739327 0.000000 26.74 14.63 79 2403.2 80 26.596638 0.000000 26.60 14.55 80 2433.6 81 26.454710 0.000000 26.45 14.47 81 2464.0 82 26.313539 0.000000 26.31 14.39 82 2494.4 83 26.173122 0.000000 26.17 14.32 83 2524.9 84 26.033454 0.000000 26.03 14.24 84 2555.3 85 25.894531 0.000000 25.89 14.16 85 2585.7 86 25.756350 0.000000 25.76 14.09 86 2616.1 87 25.618906 0.000000 25.62 14.01 87 2646.5 88 25.482196 0.000000 25.48 13.94 88 2677.0 25.346215

- - 89 0.000000 25.35 13.86 89 2707.4 90 25.210959 0.000000 25.21 13.79 90 2737.8 91 25.076426 0 000000 25.08

- 24-:i4

- - 13.72 91 2768.2 92 24.942610 0.000000 13.64 92 2798.6 93 24.809508 0.000000 24.81 13.57 93 2829.1 94 24.677117 0.000000 24.68 13.50 94 2859.5 95 24.545432 0.000000 24.55 13.43 95 2889.9 f-96 24.414450 0.000000 24.41 ~.35 96 2920.3 97 24.284167 0.000000 24.28 13.28 97 2950.7 98 24.154579 0.000000 24.15 13.21 98 2981 .2 2 of 4

Western Area, BA1 Effluent Concentration Analysis 12/7/2020 60% Water Treatment Design Input Western Area, BA1 Combined Effluent - Nitrate WAA U>DCGL (GE- BA1 Q Re- WAQ-1206-NORTH (GETR-Area WAA-01 through GE- BA1 Injection Re injection WU-02}

WAA-041 faom) faoml C1 (mg/L) 38.12 38.60 0.00 C2 (mg/L) 27.46 - 0.00 C3 (mg/L) 32.86 - 0.00 18 8 C4 (mg/L) 33.48 - 0.00 Cs (mg/L) 23.76 -- 0.00 Flow Rate (gpm) 99 8 100 t(

4.6 10.9 l"'V (liters) 664 ,087 ,208 85,334 Q

(liters/day) 539,648 43,608 C -c (-Q/(PV*R))1 c oe 11me Requ1rea tor Initial Cone. to Reach Max. Level (months) 0 0 cumulative Time nc,..,nlCU BA1-VVA (Months) WAA U>DCGL 1206-NORTH AVERAGE Combined Months Days Notes 99 24.025682 0.000000 24.03 13.14 99 3011 .6 100 23.897474 0.000000 23.90 13.07 100 3042 .0 101 23.769949 0.000000 23.77 13.00 101 3072 .4 102 23.643106 0 000000 23.64 12.93 102 3102 .8 103 23.516938 0.000000 23.52 12.86 103 3133 .3 104 23.391445 0.000000 23.39 12.79 104 3163 .7 105 23.266621 0.000000 23.27 12.73 105 3194 .1 106 23.142463 0 000000 23.14 12.66 106 3224 .5 107 23.018967 0.000000 23.02 12.59 107 3254 .9 108 22.896 131 0.000000 22.90 12.52 108 3285 .4 109 22.773950 0.000000 22.77 12.46 109 3315 .8 110 22.652421 0 000000 22.65 12.39 110 3346 .2 111 22.531540 0.000000 22.53 - - -12~32 111 3376 .6 112 22 .411305 0.000000 22.41 12.26 112 3407 .0 113 22.291711 0.000000 22.29 12.19 113 3437. 5 114 22.172756 0 000000 22.17 12.13 114 3467 .9 115 22.054435 0.000000 22.05 12.06 115 3498 .3 116 21.936746 0.000000 21.94 12.00 116 3528 .7 117 21.819684 0.000000 21.82 11.93 117 3559 .1 118 21.703247 0.000000 21.70 11.87 118 3589 .6 119 21.587432 0.000000 21.59 11.81 119 3620 .0 120 21 .472235 0 000000 21.47 11.74 120 3650 .4 121 21 .357652 0.000000 21.36 11.68 121 3680 .8 122 21.243681 0.000000 21.24 11 .62 122 3711 .2 123 21.130318 0.000000 21.13 11.56 123 3741 .7 124 21.017560 0.000000 21.02 11.50 124 3772.1 125 20.905404 0.000000 20.91 11.43 125 3802 .5 126 20.793846 0.000000 20.79 11.37 126 3832.9 127 20.682884 0.000000 20.68 11.31 127 3863 .3 128 20.572513 0.000000 20.57 11.25 128 3893 .8 129 20.462732 0.000000 20.46 11.19 129 3924 .2 130 20.353536 0.000000 20.35 11.13 130 3954 .6 131 20.244923 0.000000 20.24 11.07 131 3985 .0 132 20.136890 0.000000 20.14 11.01 132 4015 .4 133 20.029433 0.000000 20.03 10.96 133 4045.9 134 19.922550 0.000000 19.92 10.90 134 4076.3 135 19.816237 0.000000 19.82 10.84 135 4106 .7 136 19.710491 0.000000 19.71 10.78 136 4137 .1 137 19.605310 0.000000 19.61 10.72 137 4167 .5 138 19.500690 0.000000 19.50 10.67 138 4198 .0 139 19.396628 0.000000 19.40 10.61 139 4228 .4

~ - - --- --

140 19.293122 0.000000 19.29 10.55 140 4258 .8 141 19.190167 0.000000 19.19 10.50 141 4289.2 142 19.087763 0.000000 19.09 10.44 142 4319.6 143 18.985904 0.000000 18.99 10.38 143 4350.1 144 18.884590 0.000000 18.88 10.33 144 4380.5 145 18.783815 0.000000 18.78 10.27 145 4410.9 146 18.683579 0.000000 18.68 10.22 146 4441 .3 147 - 18.583878 0.000000 18.58 10.16 147 4471 .7 148 18.484708 0.000000 18.48 10.11 148 4502.2 3of 4

Western Area, BA1 Effluent Concentration Analysis 12/7/2020 60% Water Treatment Design Input Western Area, BA1 Combined Effluent - Nitrate WAA U>DCGL (GE- BA1 Q Re- WAQ-1206-NORTH (GETR-Area WAA-01 through GE- BA1 Injection Reinjection WU-02)

WAA-04I faam) faam) c, (mg/L) 38.12 38.60 0.00 C2 (mg/L) 27.46 - 0.00 C3 (mg/L) 32.86 - 0.00 18 8 C4 (mg/L)

Cs 33.46 - 0.00 (mg/L) 23.76 .. 0.00 Flow Rate (gpm) 99 8 100 I'(

4 .6 10.9 t'V (liters) 664 ,087,208 85,334 Q

(liters/day) 539,648 43 ,608 C -c (-Q/(PV*R))1 c oe 11me 1<equIrea tor Initial Cone. to Reach Max. Level (months) 0 0 CumuIat1ve Time nc1un1cu tlAl*WA (Months) WAA U>DCGL 1206-NORTH AVERAGE Combined Months Days Notes 149 18.386068 0 .000000 18.39 10.06 149 4532.6 150 18.287954 0.000000 18.29 10.00 150 4563.0 4 of 4

.0 - Stagnation Zone Analysis Nominal Pumping Scenario Operating Scenario 1 Operating Scenario 2 FIGURE 8-5 WESTERN AREA PARTICLE TRACKING 2020 STAGNATION ZONE ANALYSIS FACILITY DECOMMISSIONING PLAN REVISION 2

~ BURNS

~ M£DONNELL

~

environmental rroperties management, LLC LEGEND MONITOR WELL IN ALLUVIUM

+ MONITOR WELL IN TRANSITION ZONE

+ PROPOSED MONITOR WELL STAGNATION ZONE PARTICLE

• TRACKING START LOCATION EXTRACTION WELL STAGNATION ZONE PARTICLE TRAVEL PATH

- GROUNDWATER EXTRACTION TRENCH c_j

~

z

~

~

0

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NOTES CJ 1) THE DISTANCE BETWEEN ARROWS z REPRESENTS THE DISTANCE THE ARTICLE

~

w TRAVELS IN 60 DAYS.

w z 2) GPM - GALLONS PER MINUTE.

az 3) BASEMAP: GOOGLE EARTH 2017 w

...J

...J w

z 0 125 250 z

0 0

(J

~ SCALE IN FEET cl:i (f) z Rev No: 2 11'.

J

£0 Preparer: BELOCKWOOD Date: 2/16/2021 N

0 Reviewer: EDULLE Date: 2/16/2021 N

Z:\Clients\ENS\CERT\_Clientlnfo\Sites\Database\Geospatial\Maps & Dwgs\ArcGIS\BMCD_Files\Arcdocs\2020\2022 - Decommissioning Plan\Figure 8-5_WA GW Remed. Forward Particle Tracking - Stag. Zone Analysis (2020) Coordinate System NAO 1983 StatePlane Oklahoma North FIPS 3501 Feet

FIGURE 8-4 BURIAL AREA #1 PARTICLE TRACKING 2020 STAGNATION ZONE ANALYSIS FACILITY DECOMMISSIONING PLAN REVISION 2

~ BURNS

~ M£DONNELL

~

environmental properties management LLC Nominal Pumping Scenario Operating Scenario 1 Operating Scenario 2 LEGEND MONITOR WELL IN ALLUVIUM

+ MONITOR WELL IN SANDSTO NE C

.. MONITOR WELL IN TRANSITION ZONE EXTRACTION WELL PARTICLE ADDED FOR STAGNATION

• ZONE ANALYSIS STAGNATION ZONE PARTICLE TRAVEL PATH NOTES

1) THE DISTANCE BETWEEN ARROWS Z:\Clients\ENS\CERT\_Clientlnfo\Sites\Database\Geospatial\Maps & Dwgs\ArcGIS\BMCD_Fil REPRESENTS THE DISTANCE THE ARTICLE es\Arcdocs\2020\2022 - Decommissioning Plan\Figure 8-4_BA1 GW Remed. Forward Particle Tracking - Stag. Zone Analysis (2020) TRAVELS IN 60 DAYS.

2) GPM - GALLONS PER MINUTE.

3) BASEMAP: GOOGLE EARTH 2017 0 90 180 I

SCALE IN FEET Rev No: 2 Preparer: BELOCKWOOD Date: 2/16/2021 Reviewer: EDULLE Date: 2/16/2021 Coordinate System NAO 1983 StatePlane Oklahoma North FIPS 3501 Feet