ML22286A225

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Attachments 5 - 14, Drawings and Tables
ML22286A225
Person / Time
Site: 07000925
Issue date: 10/07/2022
From:
Burns & McDonnell Engineering Co, Cimarron Environmental Response Trust
To:
Office of Nuclear Material Safety and Safeguards
Shared Package
ML22287A079 List:
References
Download: ML22286A225 (42)


Text

Attachment 5 - WA Remediation Component Locations FIGURE 8-1 WESTERN AREA GROUNDWATER REMEDIATION AREAS FACILITY DECOMMISSIONING PLAN REVISION 3

^BURNS xkMSDONNELL environmental properties management. Lie LEGEND MONITOR WELL IN ALLUVIUM

+ MONITOR WELL IN SANDSTONE A

-f MONITOR WELL IN SANDSTONE B

+ MONITOR WELL IN SANDSTONE C f MONITOR WELL IN TRANSITION ZONE

-f PROPOSED MONITOR WELL EXTRACTION TEST WELL

© EXTRACTION WELL/SUMP

© INJECTION WELL A OUTFALL


GROUNDWATER EXTRACTION PIPING


TREATED WATER INJECTION PIPING GROUNDWATER EXTRACTION TRENCH


TREATED WATER INJECTION TRENCH


WESTERN AREA TREATMENT FACILITY

____ EXTRACTION, INJECTION, AND UTILITY CORRIDOR


WA DISCHARGE PIPING


100 pg/L URANIUM CONCENTRATION

____ WU-BA3 REMEDIATION AREA WAA U>DCGL REMEDIATION AREA 1206-NORTH REMEDIATION AREA SUBAREAS 1206 DRAINAGE PERFORATED PIPE I l EXCAVATION AREA NOTES

1) 180 picoCuries per liter (pCi/L) in the WAA U >

2022 BURNS & McDONNELL ENGINEERING COMPANY. INC.

DCGL, 1206-NORTH, and BA3 areas was calculated at 119 micrograms per liter (pg/L). The 100 pg/L isopleth is shown for conservatism.

2) BASEMAP: GOOGLE EARTH 2017 N

400 800 SCALE IN FEET Rev No: 0 Preparer: TJKIMMEL Date: 9/9/2022 Reviewer: EDULLE Date: 9/9/2022 Coordinate System NAD 1983 StatePlane Oklahoma North FIPS 3501 Feet l_______________ ____________________________________________________________ _ ; IT . . . i-.as-i.

Z:\Clients\ENS\CERT\_Clientlnfo\Sites\Database\Geospatial\Maps & Dwgs\ArcGIS\BMCD_Files\Arcdocs\2020\2022 - Decommissioning Plan\Figure 8-1_Western Area GW Remediation Areas

- Area and Linear-Weighted Averaging Results Water Treatment Design Basis Cimarron Environmental Response Trust 10/06/2022 Contour Averaqe (uq/L) 60 150 250 350 450 550 650 750 - - - - - - - - - - - Totals GWI-WU-01 (BA3) Actual Area 7,645 9,248 5,827 4,854 4,155 4,105 4,096 1,460 - - - - - - - - - " - 41,390 sq. ft.

Weiqhted Averaqe 458,700 1,387,200 1,456,750 1,698,900 1,869,750 2,257,750 2,662,400 1,095,000 - - - - - - - - - - - 311.34 ug/L URANIUM Uranium isopleths used: Sandstone A Uranium Contours (1 OOug/L)

Contour Average (ug/L) 110 130 150 170 190 210 230 250 270 290 310 330 350 370 390 410 430 450 460 Totals WU "1206 NORTH" 2,112 1,076 1,108 1,019 794 569 344 119 Actual Area 576 1,469 3,740 3,745 2,229 1,143 1,053 1,429 1,279 1,634 1,958 27,396 sq. ft.

(GETR-WU-01) 376,600 409,960 397,410 325,540 244,670 154,800 54,740 248.28 ug/L Weighted Averaqe 63,360 190,970 561,000 636,650 423,510 240,030 242,190 357,250 345,330 473,860 606,980 696,960 Uranium isooleths used: Sandstone B, Transition Zone, Alluvium Uranium Contours (20uq/L)

Contour Average (mg/L) 23 36 50 75 100 " - " " " " ' Totals GWI-WU-01 (BA3) Actual Area 1,266 21,074 3,245 14,043 1,763 - - - - - - - - - - - - - 39,627 sq. ft.

Weiqhted Averaqe 28,991 768,147 162,231 1,053,200 176,300 - - - - - - - - - - - - - - 50.79 mg/L NITRATE Nitrate isopleths used: Sandstone A Nitrate Contours (50mg/L)

Contour Averaqe (mq/L) 11 36 55 - - - - - - - - - - - - - - - Totals WU "1206 NORTH" - - - - - - - - - - - - - - - - 27,393 sq. ft.

Actual Area 3,765 17,051 6,578 (GETR-WU-01) - - - - - 37.47 mg/L Weighted Average 43,110 621,491 361,786 - - - - - - - - - - -

Nitrate isopleths used: Sandstone B, Transition Zone, Alluvium Nitrate Contours (50mg/L)

Notes:

mg/L - Milligrams per liter sq. ft. - Square feet ug/L - Micrograms per liter

1) Shapefiles used to generate the areas are saved: Z:\Clients\ENS\CERT\_Clientlnfo\Sites\Database\Geospatial\Maps & Dwgs\ArcGIS\BMCD_Files\Shapes\2020 Particle Tracking Model Updates\Scenario A
2) Surfer files for COC contours are saved here: Z:\Clients\ENS\CERT\104407_CERT-DECOM2018\Design\Deliverables\60% Design\Water Treatment Design Basis\Surfer Files

10/06/2022 Water Treatment Design Basis Cimarron Environmental Response Trust

Water Treatment Design Basis Cimarron Environmental Response Trust 10/06/2022 Ura nlum Fluoride Nitrate Weighted Weighted Weighted Segment Segment Length Cumulative Lenth Concentration Segment Segment Length Cumulative Lenth Concentration Segment Segment Length Cumulative Lenth Concentration Concentration Trench ID Concentration Trench ID Concentration Trench ID (NWtoSE) (ft) (ft) (ugfL) (NW to SE) (ft) (ft) (mg/L) (NW to SE) (f>>) (ft) (mg/L)

(ug/L/ft) (mg/Uft) (mg/Uft) 1 8.2 8.2 270 2,222.10  ; 1 2.7 2.7 4.75 12.73 1 348 34.8 10 348.00 2 9.1 17.3 290 2,639.00 2 11.0 13.7 5.25 57.65 2 61.8 96.6 30 1,853.70 GETR-WU-02 3 8.8 26.2 310 2,734.20 3 11.1 24.8 5.75 63.94 3 120.8 217.4 50 6,040.50 4 9.0 35.1 330 2,966.70 4 11.1 35.9 6.25 69.56 4 6.6 223.96 62 406.72 5 7.0 42.1 350 2,432.50 5 8.9 44.8 6.75 59.81 6 6.3 48.4 370 2,331.00 6 7.8 52.6 7.25 56.41 7 6.4 54.8 390 2,480.40 7 7.8 60.4 7.75 60.76 8 6.3 61.1 410 2,595.30 8 7.8 68.2 8.25 64.19 i 9 6.4 67.5 430 2.743.40 9 7.7 75.9 8.75 67.73 GETR-WU-02 10 6.3 73.8 450 2,844.00 10 9.2 85.1 9.25 85.01 11 10.0 83.8 470 4,714.10 11 18.1 103.2 8.75 158.46 i 12 6.9 90.7 450 3.100.50 12 19.7 122.9 8.25 162.28 13 6.4 97.1 430 2,734.80 13 10.9 133.8 7.75 84.55 14 6.3 103.4 410 2,583.00 GETR-WU-02 14 15.1 148.9 7.25 109.77 15 6.3 109.7 390 2,460.90 15 22.6 171.6 6.75 152.69 16 6.5 116.1 370 2.390.20 16 19.2 190.8 6.25 120.13 17 6.3 122.4 350 2,201.50 17 29.1 219.8 5.75 167.04 18 6.9 129.4 330 2,286.90 18 4.1 223.94 5.25 21.63 19 5.7 135.0 310 1,751.50 20 6.2 141.2 290 1,809.60 21 6.8 148.0 270 1,825.20 22 7.1 155.1 250 1,762.50 23 8.0 163.0 230 1,835.40 24 7.4 170.4 210 1,554.00 25 18.3 188.8 190 3,480.80 26 21.3 210.0 170 3,614.20 27 13,9 223.92 150 2,086.50 Groundwater Data Source (Formations) - Sandstone B/ Transition Zone / Alluvium Groundwater Data Source (Formations) - Sandstone B / Transition Zone / Alluvium Groundwater Data Source (Formations) - Sandstone B / Transition Zone / Alluvium Weighted Average = 304 ua/L Weighted Average = 38.6 mg/L

Water Treatment Design Basis Cimarron Environmental Response Trust 10/06/2022 Contour Average (ug/L) 0 10 25 35 50 70 90 110 130 140 . Totals I

GE-VYAA-05 285,057 111,947 68,515 43,451 48.816 30,729 18.532 16,985 22,961 2,485 . 649,478 sq. ft.

Weighted Average 1,119,472 1,712,866 1,520,795 2,440.788 2,151,017 1,667,911 1,868,344 2,984,868 347,965 24.35 ug/L Uranium isoplelhs used: Sandstone B, Transition Zone, Alluvium Uran um Contours (2Oug/L)

Contour Average (ug/L) 0 10 20 25 35 50 70 80 90 110 130 150 160 Totals 0 834,158 sq.ft GE-WAA-02 268,494 271,613 209 55,889 40,364 60,859 41,789 769 21,985 21,818 21.267 26,088 3,014 - Uranium 1

9 Weighted Average . 2,716,133 4,181 1,397,217 1,412,724 3,042,955 2,925,218 61,507 1,978,651 2,400.005 2.764,756 3.913,260 482,166 - - - - - 27.69 ug/L Influent Remediation URANIUM Uranium isopleths used: Sandstone B, Transition Zone, Alluvium Uran um Contours (2Oug/L) Avg. Weight Cone: Concentration Area:

Contour Average (uq/L) 0 10 20 25 35 50 70 90 100 110 120 130 150 170 190 210 230 240 250 270 290 310 330 350 370 390 410 430 450 470 Totals 90.89 ug/L Area: 4114396 2834531 sq.

o GE-WAA-03 Actual Area 22,063 94,900 137,583 219,874 204,059 244,741 407 315,104 7,968 288,441 200,502 102,259 57,926 35,402 21,617 7,428 4,866 3,437 2,897 2,742 2,504 1,231 1,199 1,019 794 569 344 119 2,097,586 sq.ft sq. ft 80,711 34,880 ft Weighted Average 807,105 697,605 2,372,512 4,815,417 10,993,714 14,284,143 22,026,729 40,717 34,661,438 956,165 37.497.266 30,075,294 17,384,016 11,006,018 7,434,508 4,971,925 1,782,722 1,216,378 927,955 840,026 849,884 826,389 430.962 443,741 397,293 325,425 244,554 154,688 55,817 99.41 ug/L o

0 Uranium isopleths used: Sandstone B, Transition Zone, Alluvium Uran um Contours (2Oug/L) a Contour Average (ug/L) 0 10 20 25 35 50 70 90 110 130 140 - - - - - Totals 1

Z>

GE-WAA-04 Actual Area 177,689 27,184 18 54,216 127,558 82,126 30,404 18,343 10,461 5,036 140 - - - 533,174 sq. ft Weighted Average 271.837 358 1,355,404 4,464.532 4,106,294 2,128.266 1,650,841 1,150,666 654,675 19,606 - - - - 29.64 ug/L I

Contour Average (mg/L) 0 11 36 75 125 175 - - - -

GE-WAA-05 310,925 50,877 25,363 167,744 83,372 11,198 . . - - 649,478 sq. ft Weighted Average 582,537 924,470 12,580,807 10,421,440 1,959,664 - - - - - - - 40.75 mg/L Nitrate isopleths used: Sandstone B, Transition Zone, Alluvium Nitra e Contours (50 mg/L)

- Totals 1$

Contour Average (mg/L) 0 11 36 50 75 100 125 0 834,158 sq.ft GE-WAA-02 349,117 138,782 87,805 1,019 199,276 710 57,448 . - - - -

Weighted Average . 1,589,052 3,200,503 50,969 14,945,688 71,044 7,180,970 - - - - - - - 32.41 mg/L Influent Nitrate NITRATE Avg. Weight Cone: Concentration Nitrate isopleths used: Sandstone B. Transition Zone. Alluvium Nitrate Contours (50 Remediation 100 - - - Totals 23.93 mg/L Area: 4114396 Contour Average (mg/L) 0 11 23 36 75 Area: N/A

. _ . - 2,097,586 sq. ft sq. ft GE-WAA-03 605.236 1,106.022 190,924 156,937 24,940 Weighted Average . 12,663,953 309,774 6,959,193 11,770,265 2,493,996 - - - - - - - 16.3 mg/L o

0 Nitrate isopleths used: Sandstone B, Transition Zone, Alluvium Nitrate Contours (50 mg/L)

Contour Average (mg/L) 0 11 36 75 . - - - - - - Totals 1

D GE-WAA-04 239,828 123,730 87,497 82,119 . . . . - 533,174 sq. ft Weighted Average 1,416,706 3,189.271 6,158,906 - - -

I Contour Average (ng/L] 0 15 25 - - - - -

GE-WAA-05 614,229 28,523 6,726 . - 649,478 sq. ft Weighted Average 427,840 168,161 - - - 0.92 ng/L Tc-99 isopleths used: Sandstone B, Transition Zone, Alluvium Tc-99 Contours (10 *J/L)

ILJ Contour Averaqe (nq/L) 0 15 25 - - - Totals 0 . . - - 834,158 sq. ft (Si GE-WAA-02 696,024 15,683 1

Weighted Average 1,836,769 392,069 - - - 2.67 ng/L Influent Nitrate Avg. Weight Cone: Concentration Tc-99 isopleths used: Sandstone B. Transition Zone, Alluvium Tc-99 Contours (10 nq/L) Remediation o - - - Totals 1.36 ng/L Area: 4114396 0 15 25 Area: N/A o . - - 2,097,586 sq. ft sq. ft GE-WAA-03 1,913,371 183.542 674 o . 2,753,125 16,838 -

0 Tc-99 isopleths used: Sandstone B, Transition Zone, Alluvium Tc-9< Contours (10 rg/L)

Q Contour Average (ng/L) 0 15 25 - - - - - Totals 1 GE-WAA-04 533,174 _ - - - - 533,174 sq. ft Weighted Average . . . . . - - - - 0 ng/L Tc-99 isopleths used: Sandstone B, Transition Zone. Alluvium Tc-9 Contours (10 ng/L)

Notes:

mg/L - MiBgrams per Her ng/L - Nanograms per l.ler sq. ft - Square feet ug/L - Micrograms per liter

Water Treatment Design Basis Cimarron Environmental Response Trust 10/06/2022 URANIUM - U>DCGL WAA 20 ug/l WITH 30 ug/l

Water Treatment Design Basis Cimarron Environmental Response Trust 10/06/2022 Contour Average (uq/L) Weight Avg. Cone.

A & B Areas 40 75 125 175 225 275 300 500 700 900 1100 1300 1500 1700 1900 2100 2300 2500 2700 2900 3100 3300 (ug/L) 65,025.00 61,870.20 56,226.72 51,789.98 48,168.06 45,160.58 42,458.02 38,022.00 31,589.90 26,849.50 22,616.00 18,650.00 14,901.30 12,142.80 9,776.00 7.556.80 4,921.50 1,317.20 -

65,025 3,154.80 5,643.48 4,436.74 3,621.92 3,007.48 2,702.56 4,436.02 6,432.10 4,740.40 4,233.50 3,966.00 3,748.70 2,758.50 2,366.80 2,219.20 2,635.30 3,604.30 1,317.20 - 823.74 126,192.00 423,261.00 554,592.50 633,836.00 676,683.00 743,204.00 1,330,806.00 3,216,050.00 3,318,280.00 3,810,150.00 4.362.600.00 4,873,310.00 4,137,750.00 4,023,560.00 4,216,480.00 5,534,130.00 8,289,890.00 3,293,000.00 -

76,285.00 70,230.00 60,391.47 52,830.16 45,744.90 39,380.10 33,620.00 23,813.91 17,329.20 13,843.30 10,910.70 8,287.20 7,034.20 5,972.60 4,994.20 4,116.50 3,249.70 2,265.70 1,278.00 609.50 221.80 172,912 32,745.50 15,934.22 10,623.38 6,364.80 5,760.10 9,806.09 6,484.71 3,485.90 2,932.60 2,623.50 1,253.00 1,061.60 978.40 877.70 866.80 984.00 987.70 668.50 387.70 215.30 6.50 248.16 67,864.00 Weighted Average 2,714,560.00 2,455,912.50 1,991,777.50 1,859,091.50 1,432,080.00 1,584,027.50 2,941,826.10 3,242,356.50 2,440,130.00 2,639,340.00 2.885,850.00 1,628,900.00 1,592,400.00 1.663,280.00 1.667,630.00 1,820,280.00 2,263,200.00 2.469,250.00 1,804,950.00 1,124,330.00 667,430.00 21,450.00 Areas derived from 50ug/L contours Areas derived from 200ug/L contours Notes:

mg/L - Milligrams per liter sq. ft. - Square feet ug/L - Micrograms per liter Area A

  • 65,025.0 sqft Area B -172,912.1 sqft URANIUM - Area BA1-A

- Remediation and Water Treatment Summary Schedule Preparer: E. Dulle; Date: 09/16/22 Figure 9 Revision 0 Reviewer: J. Hesemann; Date: 09/23/22 Remediation Schedule a; J- 2026 2027 2028 2029 2030 2031 2032 2033 2034 2035 2036 2037 2038 Remediation Area E c 1= o rn rM ro Psl ro '3- rM ro '3' rsj ro *3" CM ro rM ro Psl ro rM ro 'tf rM ro psl ro PM ro rt Psl a

pvl a cr a a a a a a cr a a a cr cr cr cr a cr cr cr cr cr a a a a a a a a a a a a a BAl-A 150 Time to Reduce Uranium to < NRC Criterion BA1-B 62 Time to Reduce Uranium to < NRC Criterion Water Treatment 126 Time Uranium Treatment System Operates Water Pumping & Injection 150 Time Pumping & Injection Continues WAA U>DCGL 135 Time to Reduce Uranium to < NRC Criterion 1206 North Time to Reduce Uranium to < NRC Criterion WU-BA3 48 Time to Reduce Uranium to < NRC Criterion Water Pumping & Treatment 135 Time Pumping & Uranium Treatment System Operates WU-BA3 Injection 48 Treated Water Injection Notes:

1Either treatment system may be bypassed if the concentration of uranium in the influent is less than 30 pg/L.

Facility Decommissioning Plan - Rev 3 Page 1 of 1

- Remediation Duration Estimate Calculations: BA1 Water Treatment Design Basis 9/29/2022 Cimmaron Environmental Response Trust Remediation and Water Treatment Duration Estimate Calculations BA1-A ("U>DCGL" Transition Zone / Sandstone B)

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

1.81 0.11 3 50.36 Table 2: Remediation Pore Volume Calculation Bulk Saturated Plume Volume [V]3 Pore Volume (ft3) Pore Volume [PV]

(ft3) Porosity [n]1 (PV = V*n] (gallons) 818,370 0.11 90,021 673,355 Table 3: Estimated Initial Aqueous-Phase Contaminant Concentration Initial Aqueous-Phase Contaminant Concentration Concentration Basis (pg/L) Remarks Incremental Averaging of Concentrations within Remediation Area 823.62 Average uranium concentration in Area A Maximum Representative Concentration within Remediation Area 2,975 Representative uranium concentration for TMW-09 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 (Pg/L)4 (pg/L)5 [#PV = -R ln(Cleanup/initial)] Remarks Pore volumes required to achieve cleanup goal 50.36 201 2,975 135.7 (DCGL) and discontinue remediation Table 5: Estimated Time to Achieve Remediation Goal (180 pCi/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 (DCGL) and discontinue 135.7 673,355 20,160 4,533 149.1 remediation.

Definitions: Notes:

ml - milliliters 1Assumes 11% transmissive porosity for BA1 transition zone, as presented in Environmental Sequence Stratigraphy (ESS) and Porosity Analysis, Burial Area 1, dated April 6, 2018.

g-gram 2Kd derived from previous studies as mentioned in the Technical Memorandum (TM007), September 2022, page 10.

pCi/L - picocuries per liter 3Plume volume calculated using Earth Volumtric Studio. Includes saturated volume of transition zone and Sandstone B formations within combined capture zone of extraction trenches GETR-BA1-01 and GETR-BA1-02, located within area of uranium ft3 - cubic feet groundwater contamination exceeding 30 pg/L.

Kd - distribution coefficient 4Remediation will be discontinued when the uranium groundwater concentration reaches 201 pg/L, the equivalent of 180 pCi/L as calculated in Uranium Activity vs. Mass Concentration (09-13-22) (ML22271A633).

ug - microgram sThe 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 (determined using L- liter 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 incremental averaging is performed using gpm - gallons per minute isopleth contours developed using representative groundwater concentrations for monitor wells located within the remediation area (see Incr. AWCA Calcs (09-09-22).xlsx). Initial aqueous-phase contaminant concentrations will be variable.

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

7FIow rate is based on the nominal combined groundwater recovery rate for extraction trenches GETR-BA1-01 and GETR-BA1-02.

- 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.

Water Treatment Design Basis 9/29/2022 Cimmaron Environmental Response Trust Remediation and Water Treatment Duration Estimate Calculations BA1-B ("U>DCGL" Alluvium)

Table 1: Retardation Calculation n **

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 Plume Area of Plume [A] Thickness [b]3 Pore Volume (ft3) Pore Volume [PV]

(ft2) Porosity [n]1 (ft) [PV = b*n*A] (gallons) 172,912 0.3 16 829,978 6,208,232 Table 3: Estimated Initial Aqueous-Phase Contaminant Concentration Initial Aqueous-Phase Contaminant Concentration Concentration Basis (Pg/L) Remarks Incremental Averaging of Concentrations within Remediation Area 248 Average uranium concentration in Area B Maximum Representative Concentration within Remediation Area 3,516.00 Representative uranium concentration forTMW-13 Table 4a: Estimated Number of Pore Volumes to Achieve Remediation Goal (180 pCi/L)

Uranium Cleanup Initial Aqueous-Phase No. of Pore Volumes6 Concentration Contaminant Concentration [#PV = -R R (pg/L)4 (Pg/L)5 ln(Cleanup/lnitial)] Remarks Pore volumes required to achieve cleanup goal (DGCL) and 13.07 201 3,516.00 37.4 discontinue remediation Table 5a: Estimated Time to Achieve Remediation Goal (180 pCi/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 (DGCL) and 37.4 6,208,232 86 123,840 1,875 61.7 discontinue remediation.

Definitions: Notes:

ml - milliliters Assumes 30% transmissive porosity for alluvial sand, as presented in the Technical Memorandum (TM007), September 2022, page 8.

g - gram 2Kd derived from previous studies as mentioned in the Technical Memorandum (TM007), September 2022, page 10.

ft3 - cubic feet Saturated zone thickness assumed to be 16 feet, as presented in the Technical Memorandum (TM007), September 2022, page 9.

Kd - distribution coefficient 4Remediation will be discontinued when the uranium groundwater concentration reaches 201 pg/L, the equivalent of 180 pCi/L as calcuated in Uranium Activity vs. Mass Concentration (09-13-22) (ML22271A633).

ug - microgram 5The 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 (determined using sampling results for monitoring events conducted from pCi/L - picocuries per liter 2011 through Q2 2017), (2) the concentration estimated by conducting incremental averaging of concentrations within the specified treatment area. The incremental averaging is performed using isopleth contours developed using representative groundwater concentrations for monitor wells L - liter located within the remediation area (see incr. AWCA Calcs (09-09-22).xlsx). Initial aqueous-phase contaminant concentrations will be variable.

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

gpd - gallons per day 7Flow rate is based on the nominal combined groundwater recovery rate for extraction wells GE-BA1-02 through GE-BA1-04.

DCGL- Derived Concentration Goal 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.

- Remediation Duration Estimate Calculations: WA Water Treatment Design Basis 9/29/2022 Cimmaron Environmental Response Trust Remediation and Water Treatment Duration Estimate Calculations WAA U>DCGL (Alluvium/Transition Zone/SSB)

Uranium Pb Table 1: Retardation Calculation n "

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 (pg/L) Remarks Incremental Averaging of Concentrations within Average uranium concentration [see Incr. AWCA Calcs_Scenario A-2 Remediation Area 91.04 (10-26-20)]

Maximum Representative Concentration within Remediation Area 177.80 Representative uranium concentration for WELL T-62 WAA U>DCGL- Uranium

) \ \ \ ----------------- -

Table 4a: Estimated Number of Pore Volumes to Achieve Remediation Goal (123 ug/L)

Uranium Cleanup Initial Aqueous-Phase (D

+->

Concentration Contaminant Concentration No. of Pore Volumes6 E R (Ug/L)4 (Ug/L )5 [#PV = -R ln(Cleanup/lnitial)] Remarks to LU C

o 13.07 123 178 4.8 Pore volumes required to achieve cleanup goal (DCGL) and discontinue remediation 4>

ro zs Q Table 5a: Estimated Time to Achieve Remediation Goal (123 ug/L)

_i e? Pore Volume Flow Rate Flow Rate Duration Estimate Q No. of Pore Volumes (gallons) (gpm)7 (gpd) Duration Estimate (days) (months) Remarks Time to achieve cleanup goal (DCGL) and 4.8 120,853,064 99 142,560 4,082 134.2 discontinue remediation.

Definitions: Notes:

ml - milliliters Assumes 30% transmissive porosity for alluvial sand, as presented in the Technical Memorandum (TM007), September 2022, page 8.

g-gram 2Kd derived from previous studies as mentioned in the Technical Memorandum (TM007), September 2022, page 10.

ft3-cubicfeet Saturated zone thickness assumed to be 16 feet, as presented in the Technical Memorandum (TM007), September 2022, page 9.

4Remediation will be discontinued when the uranium groundwater concentration reaches 123 pg/L, the equivalent of 180 pCi/L as calcuated in Uranium Activity vs. Mass Concentration (09-13-22) (ML22271A633).

Kd - distribution coefficient ug - microgram 5The 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.

L- liter The incremental averaging is performed using isopleth contours developed using representative groundwater concentrations for monitor wells located within the remediation area (see Incr. AWCA Calcs (09-09-22).xisx). Initial gpm - gallons per minute aqueous-phase contaminant concentrations will be variable.

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

DCGL- Derived Concentration Goal Level 7FIow rate is based on the nominal combined groundwater recovery rate for extraction wells GE-WAA-02 through GE-WAA-05.

- 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.

Water Treatment Design Basis 9/29/2022 Cimmaron Environmental Response Trust Remediation and Water Treatment Duration Estimate Calculations 1206-NORTH (Alluvium/Transition Zone/SSB)

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

1.81 0.11 3 50.36 Table 2: Remediation Pore Volume Calculation Bulk Saturated Plume Volume [V]3 Pore Volume (ft3) Pore Volume [PV]

(ft3) Porosity [n]1 [PV = V*n] (gallons) 27,396 0.11 3,014 22,541 Table 3: Estimated Initial Aqueous-Phase Contaminant Concentration Initial Aqueous-Phase Contaminant Concentration Concentration Basis (Pg/L) Remarks Incremental Averaging of Concentrations within Average uranium concentration [see Incr. AWCA Calcs_Scenario A-2 (10 Remediation Area 248.49 20)]

Maximum Representative Concentration within Remediation Area 526.60 Representative uranium concentration for WELL MWWA-03

/ j 1206 North - Uranium Table 4a: Estimated Number of Pore Volumes to Achieve Remediation Goal (123 ug/L)

Uranium Cleanup Initial Aqueous-Phase

+-1CD Concentration Contaminant Concentration No. of Pore Volumes6 E

4->> R (Ug/L)4 (Pg/L)5 [#PV = -R ln(Cleanup/lnitial)] Remarks LU C

Pore volumes required to achieve cleanup goal (DCGL) and o

+->> 50.36 123 527 73.2 discontinue remediation s_

3 Q

_i Table 5b: Estimated Time to Achieve Remediation Goal (123 ug/L)

CD U Pore Volume Flow Rate Flow Rate Duration Estimate Duration Estimate No. of Pore Volumes (gallons) (gpm)7 (gpd) (days) (months) Remarks Time to achieve cleanup goal (DCGL) and 73.2 22,541 8 11,520 143 4.8 discontinue remediation.

Definitions: Notes:

ml - milliliters Assumes 11% transmissive porosity for BA1 transition zone, as presented in Environmental Sequence Stratigraphy (ESS) and Porosity Analysis, Burial Area 1, dated April 6, 2018.

g-gram 2Kd derived from previous studies as mentioned in the Technical Memorandum (TM007), September 2022, page 10.

ft3 - cubic feet 3Plume volume calculated using Earth Volumtric Studio. Includes saturated volume of transition zone and Sandstone B formations within capture zone of extraction trench GETR-WU-01, located within area of uranium Kd - distribution coefficient groundwater contamination exceeding 30 pg/L.

ug - microgram 4Remediation will be discontinued when the uranium groundwater concentration reaches 123 pg/L, the equivalent of 180 pCi/L as calcuated in Uranium Activity vs. Mass Concentration (09-13-22) (ML22271A633).

pCi/L - picocuries per liter 5The 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 L- liter remediation area (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 gpm - gallons per minute 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 Incr.

gpd - gallons per day AWCA Calcs (09-09-22).xlsx). Initial aqueous-phase contaminant concentrations will be variable.

DCGL- Derived Concentration Goal Level 6Number of pore volumes assumes linear, reversible and instantaneous sorption, and may result in an underestimation of cleanup timeframe estimates.

7FIow rate is based on the nominal groundwater recovery rate for extraction trench GETR-WU-01.

- 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.

Water Treatment Design Basis 9/29/2022 Cimmaron Environmental Response Trust Remediation and Water Treatment Duration Estimate Calculations WU-BA3 (SSA)

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

1.81 0.1 3 55.30 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) 41,390 0.1 5 20,695 154,799 Table 3: Estimated Initial Aqueous-Phase Contaminant Concentration Initial Aqueous-Phase Contaminant Concentration Concentration Basis (Pg/L) Remarks Incremental Averaging of Concentrations within Remediation Area 311.34 Average uranium concentration Maximum Representative Concentration within Remediation Area 875 Representative uranium concentration for WELL 1351 Table 4a: Estimated Number of Pore Volumes to Achieve Remediation Goal (123 ug/L) X 1 WU-BA3-Uranium Uranium Cleanup Initial Aqueous-Phase CD 4 >> Concentration Contaminant Concentration No. of Pore Volumes6 CD E R (fig/L)4 (Ug/L)5 [#PV = -R ln(Cleanup/lnitial)j Remarks to LU 55.30 123 875 108.5 Pore volumes required to achieve cleanup goal (DCGL) and C

o

'+-*

CD L_

=5 o Table 5a: Estimated Time to Achieve Remediation Goal (123 ug/L) 1 Pore Volume Flow Rate Flow Rate Duration Estimate Duration Estimate u

o No. of Pore Volumes (gallons) (gpm)7 (gpd) (days) (months) Remarks Time to achieve cleanup goal (DCGL) and discontinue 108.5 154,799 8 11,520 1,458 48.0 remediation.

Definitions: Notes:

ml - milliliters 1Assumes 10% transmissive porosity for alluvial sand, as presented in the Technical Memorandum (TM007), September 2022, page 8.

g-gram 2Kd derived from previous studies as mentioned in the Technical Memorandum (TM007), September 2022, page 10.

ft3 - cubic feet Saturated zone thickness assumed to be 5 feet, as presented in the Technical Memorandum (TM007), September 2022, page 9.

Kd - distribution coefficient 4Remediation will be discontinued when the uranium groundwater concentration reaches 123 pg/L, the equivalent of 180 pCi/L as calcuated in Uranium Activity vs. Mass Concentration (09-13-22) (ML22271A633).

ug - microgram 5The 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 pCi/L - picocuries per liter area (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 L-liter treatment area. The incremental averaging is performed using isopleth contours developed using representative groundwater concentrations for monitor wells located within the remediation area (see Incr. A WCA Calcs gpm - gallons per minute (09-09-22).xlsx). Initial aqueous-phase contaminant concentrations will be variable.

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

DCGL - Derived Concentration Goal Level 7FIow rate is based on the nominal water injection rate for injection trench GWI-WU-01.

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.

0 - Nitrate Time-Weighted Concentration Averaging Results Water Treatment Design Basis 9/27/2022 Cimmaron Environmental Response Trust Total Area Contour Average Year . . Totals (sq. ft.) (mq/L) 23 36 50 75 100 Actual Area 1,266 20,770 3,245 12,788 1,763 - - 39,831 sq. ft.

1 39,831.36 Weiqhted Averaqe 28,982 757,061 162,231 959,107 176,318 - - 52.31 mg/L Actual Area - 304 - 1,255 - - - 1,559 sq.ft.

2 1,558.60 Weiqhted Averaqe - 11,082 - 94,092 - - - 67.48 mq/L GWI-WU-01 (BA3)

Actual Area - - - - - - - sq. ft.

3 -

Weiqhted Averaqe - - - - - - - -

Actual Area - - - - - - - sq. ft.

4 -

Weiqhted Averaqe - - - - - - - -

Actual Area - - - - - - - sq. ft.

5 -

Weiqhted Averaqe - - - - - - - -

NITRATE Nitrate isopleths used: Sandstone A Nitrate Contours (50mg/L)

Total Area Contour Average Year _ _ _ Totals (sq. ft.) (mq/L) 11 36 75 _

Actual Area 3,765 17,051 6,578 - - - - 27,393 sq. ft.

1 27,393.46 Weiqhted Averaqe 43,110 621,491 493,345 - - - - 42.27 mq/L Actual Area - - - - - - - sq. ft.

2 -

WU "1206 NORTH" Weiqhted Averaqe - - - - - - - -

(GETR-WU-01) Actual Area - - - - - - - sq. ft.

3 -

Weiqhted Averaqe - - - - - - - -

Actual Area - - - - - - - sq. ft.

4 -

Weiqhted Averaqe - - - - - - - -

Actual Area - - - - - - - sq. ft.

5 -

Weiqhted Averaqe - - - - - - - -

Nitrate isopleths used: Sandstone B, Transition Zone, Alluvium Nitrate Contours (50mg/L)

Notes:

mg/L - Milligrams per liter sq. ft. - Square feet

Water Treatment Design Basis 9/27/2022 Cimmaron Environmental Response Trust NITRATE^ -1206 NORTH - SCENARIO A - 50 mg/L WITH 22.9 mg/L - Colored bv

Water Treatment Design Basis 9/27/2022 Cimmaron Environmental Response Trust Total Area Contour Average Year Totals (sq. ft.) (mg/L) 0 11 36 75 125 175 _

Actual Area 89,356 45,748 19,864 83,668 - - - 238,636 sq.ft.

1 238,636.18 Weighted Average - 523,817 724,043 6,275,063 - - - 31.52 mg/L Actual Area 84,863 - - 54,477 8,931 - - 148,270 sq.ft.

2 148,269.81 Weighted Average - - - 4,085,738 1,116,333 - - 35.09 mg/L GE-WAA-05 Actual Area 59,024 - - 12,683 30,999 - - 102,706 sq.ft.

3 102,705.76 Weighted Average - - - 951,191 3,874,899 - - 46.99 mg/L Actual Area 41,497 - - 6,176 25,019 1,789 - 74,481 sq. ft.

4 74,480.97 Weighted Average - - - 463,207 3,127,380 313,100 - 52.41 mg/L Actual Area 36,185 5,128 5,498.68 10,741 18,423 9,408.94 - 85,385 sq. ft.

5 85,385.17 Weighted Average - 58,719 200,427 805,608 2,302,829 1,646,565 - 58.72 mg/L Nitrate isopleths used: Sandstone B, Transition Zone, Alluvium tJitrate Contours (50mg/L)

Total Area Contour Average Year 11 36 50 75 100 125 Totals (sq. ft.) (mg/L) 0 Actual Area 90,034 57,108 33,686 607 85,857 710 - 268,000 sq. ft.

1 268,000.40 Weighted Average - 653,882 1,227,837 30,326 6,439,262 71,044 - 31.43 mg/L Actual Area 95,033 - - 413 56,541 - 11,716 163,703 sq.ft.

2 163,702.53 Weighted Average - - - 20,644 4,240,592 - 1,464,491 34.98 mg/L GE-WAA-02 WAA U>DCGL (GE-WAA-02:GE-WAA-05)

Actual Area 62,424 - 12,891 - 32,709 108,025 sq.ft.

3 108,024.73 Weighted Average - - - - 966,852 - 4,088,640 46.8 mg/L Actual Area 41,682 3,642 37,552 - 42,817 - 13,023 138,715 sq. ft.

4 138,714.89 Weighted Average - 41,703 1,368,764 - 3,211,253 - 1,627,839 45.05 mg/L Actual Area 59,945 78,032 16,568 - 1,170 - - 155,715 sq.ft.

5 155,715.14 Weighted Average - 893,468 603,902 - 87,728 - - 10.18 mg/L NITRATE Nitrate isopleths used: Sandstone B, Transition Zone, Alluvium hJitrate Contours (50mg/L)

Total Area Contour Average Year Totals (sq. ft.) (mg/L) 0 11 23 36 75 100 _

Actual Area 58,801 55,598 - 65,727 126,079 24,940 - 331,146 sq.ft.

1 331,145.85 Weighted Average - 636,602 - 2,395,765 9,455,917 2,493,996 - 45.24 mg/L Actual Area 141,541 165,079 - 90,194 25,113 - - 421,927 sq. ft.

2 421,926.98 Weighted Average - 1,890,156 - 3,287,565 1,883,467 - - 16.74 mg/L GE-WAA-03 Actual Area 139,900 270,858 13,527 18,623 5,720 - - 448,629 sq. ft.

3 448,628.73 Weighted Average - 3,101,329 493,068 1,396,740 571,987 - - 12.4 mg/L Actual Area 92,197 334,451 - 16,380 25 - - 443,052 sq. ft.

4 443,052.43 Weighted Average - 3,829,462 - 1,228,490 2,522 - - 11.42 mg/L Actual Area 172,797 280,035 - - - - - 452,832 sq. ft.

5 452,832.14 Weighted Average - 3,206,404 - - - - - 7.08 mg/L Nitrate isopleths used: Sandstone B, Transition Zone, Alluvium Jitrate Contours (50mg/L)

Total Area Contour Average Year Totals (sq. ft.) (mg/L) 0 11 36 75 _ _ _

Actual Area 47,387 73,199 50,692 18,922 - - - 190,200 sq.ft.

1 190,199.96 Weighted Average - 838,124 1,847,735 1,419,181 - - - 21.58 mg/L Actual Area 63,610 22,181 17,011 20,351 - - - 123,153 sq.ft.

2 123,153.34 Weighted Average - 253,975 620,049 1,526,319 - - - 19.49 mg/L GE-WAA-04 Actual Area 48,953 12,840 9,043 15,255 - - - 86,091 sq. ft.

3 86,090.84 Weighted Average - 147,015 329,613 1,144,130 - - - 18.83 mg/L Actual Area 37,260.70 7,518.70 5,170 11,954.83 - - - 61,904 sq. ft.

4 61,903.91 Weighted Average - 86,089 188,435 896,612 - - - 18.92 mg/L Actual Area 42,617 7,992 5,581 15,636 - - - 71,826 sq.ft.

5 71,825.85 Weighted Average - 91,503 203,439 1,172,664 - - - 20.43 mg/L Nitrate isopleths used: Sandstone B, Transition Zone, Alluvium Nitrate Contours (50mg/L)

Notes:

mg/L - Milligrams per liter sq. ft. - Square feet

Water Treatment Design Basis 9/27/2022 Cimmaron Environmental Response Trust

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Water Treatment Design Basis Cimmaron Environmental Response Trust 9/27/2022

9/27/2022 Water Treatment Design Basis Cimmaron Environmental Response Trust

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

9/27/2022 Water Treatment Design Basis Cimmaron Environmental Response Trust Year 5 5.270.86 s (ft Omg/L NITRATE - U>DCGL Year 5 - SCENARIO A 50 mg/L WITH 22.9 mg/L - Colored by Year 1 - Nitrate Flow Rate-Weighted Concentration Averaging Results

Nitrate Flow Rate-Weighted Concentration Averaging Results 9/28/2022 Water Treatment Design Basis Influent Flow Adjusted Weighted Remediation Extraction Rate Flow Rate Nitrate Nitrate Year Area Well/Trench (gpm) (gpm) (mg/L) (mg/L) q q*% C, q*C, Comments:

-Initial Influent Concentration: Linear, incremental concentration averaging along trench alignment using isoconcentration contours [se

- 1 38.60 308.80 Incr. AWCA Calcs (09-09-22).

- 2 - -

1206-North GETR-WU-01 8 - 3 - -

- Maximum Influent Concentration: Nitrate concentration from year with highest TWCA concentration [see Incr. TWCA Calcs (09-09-22).

- 4 - -

- 5 - -

- 1 31.52 788.00 - Initial Influent Concentration: Nitrate concentrations from year 1 [see Incr. TWCA Calcs (09-09-22).

- 2 35.09 877.25 GE-WAA-05 25

- 3 46.99 1,174.75

- Maximum Influent Concentration: Nitrate concentration from year with highest TWCA concentration [see Incr. TWCA Calcs (09-09-22).

- 4 52.41 1,310.25

- 5 58.72 1,468.00

- 1 31.43 942.90 - Initial Influent Concentration: Nitrate concentrations from year 1 [see Incr. TWCA Calcs (09-09-22).

- 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 Incr. TWCA Calcs (09-09-22).

- 4 45.05 1,351.50 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 Incr. TWCA Calcs (09-09-22).

- 4 11.42 274.08

- 5 7.08 169.92

- 1 21.58 431.60 - Initial Influent Concentration: Nitrate concentrations from year 1 [see Incr. TWCA Calcs (09-09-22).

- 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 Incr. TWCA Calcs (09-09-22).

- 4 18.92 378.40

- 5 20.43 408.60 Initial £q*c, 107 0 4,082.42 Initial £q 107.00 Initial Influent Concentration 38.15 Notes:

gpm - gallons per minute mg/L - milligrams per liter ug/L - micrograms per liter 2 - WA Influent Concentration Analysis Results Western Area Treatment Duration Analysis 9/28/2022 Water Treatment Design Basis WATF - Uranium Time Required for Is C, Time Required for Combined Combined Influent representative Flow Initial Cone, to Influent Cone, to Reach c, Ci Cmax Cmax Cmax? Rate PV1 PV Q Reach Max. Level c, c, MCL Remediation Area (M9/L) Source (Mg/L) Source (Y/N) (gpm) R1 (ft3) (liters) (liters/day) (days)2 (pg/L) (pg/L) (months)

WAA U>DCGL (GE-WAA-02 through GE-WAA-05) 147 FWCA 147 FWCA Y 99 13.1 16,156,827 457,509,639 539,648 0 101.4 101.4 N/A 1206-NORTH (GETR-WU-01) 304 LWCA 304 LWCA Y 8 50.4 3,014 85,334 43,608 0 0.00 Combined Treatment System Influent Flow Rate" 107 WATF - Nitrate Time Required for Is C, Initial Cone, Combined representative to Reach Influent c, c, C2 C3 c5 Cmax Cmax Of Cmax? Flow Rate PV2 PV Q Max. Level c, c, Remediation Area (mg/L) Source (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-02 through GE-WAA-05) 38.1 FWCA 27 33 33 24 38.1 FWCA Y 99 4.62 23,452,057 664,087,208 539,648 0 19.82 19.82 1206-NORTH (GETR-WU-01) 38.6 FWCA - - - - 38.6 FWCA Y 8 10.9 3,014 85,334 43,608 0 0.00 Combined Treatment System Influent Flow Rate 107 WATF - Fluoride Is C; representative Ci Ci Cmax Cmax Cmax?

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

WAA U>DCGL (GE-WAA-02 through GE-WAA-05) 2.3 FWCA 2.3 FWCA Y 1206-NORTH (GETR-WU-01) 7.03 LWCA 7.03 LWCA Y r _r (-Q/{PV*R))t cubic foot = 28.3168 liters

^t^*0 gpm = 5451 liters per day Notes:

Cl - initial concentration Cf - final concentration Cmax - maximum concentration gpm - gallons per minute MCL - maximum contaminant level mg/L - milligrams per liter R - retardation R = i + Kd PV - pore volume n Q - flow rate AWCA - Area-weighted concentration averaging FWCA - Flow rate-weighted concentration averaging LWCA - Linear-weighted concentration averaging SIC - Surfer-interpolated concentration

'Retardation (R) and pore volume (PV) taken from [Remediation Duration Estimates (08-29-22)]. To more accurately represent influent concentration calculations, the remediation area was as the area for PV calculations.

2Retardation (R) and pore volume (PV) for nitrate taken from [Decay Analysis Pore Volumes (08-29-22)]. 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.

Western Area Uranium Influent Concentration Analysis 9/28/2022 Water Treatment Design Basis Western Area Combined Influent - Uranium WAA U>DCGL (GE-1206-NORTH (GETR-WAA-02 through GE-WU-01)

Area WAA-05)

C, (m<L) 146.94 304.00

^max 1 (ug/L) 146.94 304.00 Flow Rate (gpm) 99 8 R 13.1 50.4 PV (liters) 457.509.639 85.334 r _r J-Q/(PV*R))t Q

(liters/day) 539.648 43,608 Time Required for Initial Cone, to Reach Max. Level (months) 0 0 Combined Cumulative Time WEIGHTED Influent Flow WAA U>DCGL 1206-NORTH AVERAGE Rate Months Days Notes 0 146.936364 304.000000 158.68 107 0 0.0 1 146.533426 223.266349 152.27 107 1 30.4 2 146.131593 163.973233 147.47 107 2 60.8 3 145.730862 120.426662 143.84 107 3 91.3 4 145.331231 88.444806 141.08 107 4 121.7 According to remediation duration calculations for 1206 North, uranium DCGL is met at 4 8 months: however 1206 North 5 144.932695 64.956411 138.95 107 5 152.1 groundwater extraction will continue until water injection in WU-BA3 is discontinued in Month 48.

6 144.535251 47.705858 137.30 107 6 182.5 7 144.138898 35.036555 135.98 107 7 212.9 8 143.743632 25.731854 134.92 107 8 243.4 9 143.349449 18.898215 134.04 107 9 273.8 10 142.956348 13.879393 133.31 107 10 304.2 11 142.564325 10.193425 132.67 107 11 334.6 12 142.173376 7.486345 132.10 107 12 365.0 13 141.783500 5.498187 131.59 107 13 395.5 14 141.394693 4.038027 131.13 107 14 425.9 15 141.006952 2.965643 130.69 107 15 456.3 16 140.620274 2.178054 130.27 107 16 486.7 17 140.234657 1.599625 129.87 107 17 517.1 18 139.850097 1.174811 129.48 107 18 547.6 19 139.466591 0.862815 129.10 107 19 578.0 20 139.084138 0.633676 128.73 107 20 608.4 21 138.702733 0.465390 128.37 107 21 638.8 22 138.322374 0.341796 128.01 107 22 669.2 23 137.943058 0.251025 127.65 107 23 699.7 24 137.564782 0.184360 127.29 107 24 730.1 25 137.187544 0.135399 126.94 107 25 760.5 26 136.811340 0.099441 126.59 107 26 790.9 27 136.436168 0.073032 126.24 107 27 821.3 28 136.062024 0.053637 125.89 107 28 851.8 29 135.688907 0.039393 125.55 107 29 882.2 30 135.316813 0.028931 125.20 107 30 912.6 31 134.945739 0.021248 124.86 107 31 943.0 32 134.575683 0.015605 124.52 107 32 973.4 33 134.206641 0.011461 124.17 107 33 1003.9 34 133.838612 0.008417 123.83 107 34 1034.3 35 133.471591 0.006182 123.49 107 35 1064.7 36 133.105578 0.004540 123.15 107 36 1095.1 37 132.740568 0.003334 122.82 107 37 1125.5 38 132.376558 0.002449 122.48 107 38 1156.0 39 132.013548 0.001799 122.14 107 39 1186.4 40 131.651532 0.001321 121.81 107 40 1216.8 41 131.290509 0.000970 121.47 107 41 1247.2 42 130.930477 0.000712 121.14 107 42 1277.6 43 130.571431 0.000523 120.81 107 43 1308.1 44 130.213370 0.000384 120.48 107 44 1338.5 45 129.856292 0.000282 120.15 107 45 1368.9 46 129.500192 0.000207 119.82 107 46 1399.3 47 129.145069 0.000152 119.49 107 47 1429.7 According to remediation duration calculations for WU-BA3, uranium DCGL is met at 48.0 months. Groundwater 48 128.790919 0.000112 128.79 99 48 1460.2 extraction in 1206 North is discontinued.

49 128.437741 0.000000 128.44 99 49 1490.6 50 128.085532 0.000000 128.09 99 50 1521.0 51 127.734288 0.000000 127.73 99 51 1551.4 52 127.384007 0.000000 127.38 99 52 1581.8 53 127.034687 0.000000 127.03 99 53 1612.3 54 126.686325 0.000000 126.69 99 54 1642.7 55 126.338918 0.000000 126.34 99 55 1673.1 56 125.992464 0.000000 125.99 99 56 1703.5 57 125.646960 0.000000 125.65 99 57 1733.9 58 125.302403 0.000000 125.30 99 58 1764.4 59 124.958792 0.000000 124.96 99 59 1794.8 60 124.616122 0.000000 124.62 99 60 1825.2 61 124.274392 0.000000 124.27 99 61 1855.6 62 123.933600 0.000000 123.93 99 62 1886.0 63 123.593741 0.000000 123.59 99 63 1916.5 64 123.254815 0.000000 123.25 99 64 1946.9 65 122.916819 0.000000 122.92 99 65 1977.3 66 122.579749 0.000000 122.58 99 66 2007.7 67 122.243603 0.000000 122.24 99 67 2038.1 68 121.908379 0.000000 121.91 99 68 2068.6 69 121.574075 0.000000 121.57 99 69 2099.0 70 121.240687 0.000000 121.24 99 70 2129.4 71 120.908214 0.000000 120.91 99 71 2159.8 72 120.576652 o.oooooo! 120.58 99 72 2190.2 73 120.246000 0.000000 120.25 99 73 2220.7 74 119.916254 0.000000 119.92 99 74 2251.1 75 119.587412 0.000000 119.59 99 75 2281.5 76 119.259473 0.000000 119.26 99 76 2311.9 77 118.932432 0.000000 118.93 99 77 2342.3 78 118.606288 0.000000 118.61 99 78 2372.8 79 118.281039 0.000000 118.28 99 79 2403.2 80 117.956682 0.000000 117.96 99 80 2433.6 81 117.633214 0.000000 117.63 99 81 2464.0 82 117.310633 0.000000 117.31 99 82 2494.4 83 116.988937 0.000000 116.99 99 83 2524.9 84 116.668123 0.000000 116.67 99 84 2555.3 85 116.348189 0.000000 116.35 99 85 2585.7 86 116.029132 0.000000 116.03 99 86 2616.1 87 115.710950 0.000000 115.71 99 87 2646.5 88 115.393640 0.000000 115.39 99 88 2677.0 89 115.077201 0.000000 115.08 99 89 2707.4 90 114.761629 0.000000 114.76 99 90 2737.8 91 114.446923 0.000000 114.45 99 91 2768.2 92 114.133080 0.000000 114.13 99 92 2798.6 93 113.820097 0.000000 113.82 99 93 2829.1 94 113.507973 0.000000 113.51 99 94 2859.5 95 113.196704 0.000000 113.20 99 95 2889.9 96 112.886290 0.000000 112.89 99 96 2920.3 97 112.576726 0.000000 112.58 99 97 2950.7 98 112.268012 0.000000 112.27 99 98 2981.2 99 111.960143 0.000000 111.96 99 99 3011.6 100 111.653120 0.000000 111.65 99 100 3042.0 101 111.346938 0.000000 111.35 99 101 3072.4 102 111.041596 0.000000 111.04 99 102 3102.8 103 110.737091 0.000000 110.74 99 103 3133.3 104 110.433421 0.000000 110.43 99 104 3163.7 105 110.130584 0.000000 110.13 99 105 3194.1 106 109.828577 0.000000 109.83 99 106 3224.5 107 109.527398 0.000000 109.53 99 107 3254.9 108 109.227046 0.000000 109.23 99 108 3285.4 109 108.927517 0.000000 108.93 109 3315.8 110 108.628809 0.000000 108.63 99 110 3346.2 111 108.330921 0.000000 108.33 99 111 3376.6 112 108.033849 0.000000 108.03 99 112 3407.0 113 107.737593 0.000000 107.74 99 113 3437.5 114 107.442148 0.000000 107.44 99 114 3467.9 115 107.147514 0.000000 107.15 99 115 3498.3 116 106.853687 0.000000 106.85 99 116 3528.7 117 106.560667 0.000000 106.56 99 117 3559.1

Western Area Uranium Influent Concentration Analysis 9/28/2022 Water Treatment Design Basis Western Area Combined Influent - Uranium WAA U>DCGL (GE-1206-NORTH (GETR-WAA-02 through GE-WU-01)

Area WAA-05)

C, (pg/i) 146.94 304.00 Cmax

( M9/L) 146.94 304.00 Flow Rate (gpm) 99 8 R 13.1 50.4 PV (liters) 457,509,639 85,334 r _r _(-Q/(PV*R))t Q

(liters/day) 539,648 43,608 Time Required for Initial Cone, to Reach Max. Level (months) 0 0 Combined Cumulative Time WEIGHTED Influent Flow (Months) WAA U>DCGL 1206-NORTH AVERAGE Rate Months Days Notes 118 106.268450 0.000000 106.27 99 118 3589.6 119 105.977034 0.000000 105.98 99 119 3620.0 120 105.686418 0.000000 105.69 99 120 3650.4 121 105.396598 0.000000 105.40 99 121 3680.8 122 105.107573 0.000000 105.11 99 122 3711.2 123 104.819341 0.000000 104.82 99 123 3741.7 124 104.531899 0.000000 104.53 99 124 3772.1 125 104.245245 0.000000 104.25 99 125 3802.5 126 103.959378 0.000000 103.96 99 126 3832.9 127 103.674294 0.000000 103.67 99 127 3863.3 128 103.389992 0.000000 103.39 99 128 3893.8 129 103.106470 0.000000 103.11 99 129 3924.2 130 102.823725 0.000000 102.82 99 130 3954.6 131 102.541756 0.000000 102.54 99 131 3985.0 132 102.260560 0.000000 102.26 99 132 4015.4 133 101.980135 0.000000 101.98 99 133 4045.9 134 101.700479 0.000000 101.70 99 134 4076.3 135 101.421590 0.000000 101.42 99 135 4106.7 According to remediation duration calculations for WAA U>DCGL, uranium DCGL is met at 134.2 months 3 - BA1 Influent Concentration Analysis Results BA1 Influent Concentration Analysis 09/28/2022 Water Treatment Design Basis BA1 - Uranium Time Required for Is C, Time Required for Combined Combined Influent representative Initial Cone, to Reach Influent Cone, to Reach c, c, °f Cmax? Flow Rate PV1 PV Q Max. Level Cfat 150 months Cf at 150 Months MCL Cmax Remediation Area (M9/L) Source (M9/L) Source (Y/N) (gpm) R1 (ft3) (liters) (liters/day) (days) (pg/L) (pg/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 76,314 0 114 17.8 126 BA1-B3 (GE-BA1-02 through GE-BA1-04) 1,132.5 FWCA 1,132.5 FWCA Y 86 13 916,942 25,964,863 468,785 0 2.07 Combined Treatment System Influent Flow Rate 100 cubic foot = 28.3168 liters

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

Cl - initial concentration Cf - final concentration Cmax - maximum concentration gpm - gallons per minute MCL - maximum contaminant level ug/L - micrograms per liter R - retardation R = 1 + Kd n

PV - pore volume Q - flow rate FWCA - Flow rate-weighted concentration averaging Retardation (R) and pore volume (PV) taken from remediation duration estimate calculations [Remediation Duration Estimates (08-29-22)].

BA1 Uranium Influent Concentration Analysis 08/30/2022 Water Treatment Design Basis BA1 Combined Influent - Uranium BA1-A1 (GETR-BA1-01 BA1-B3 (GE-BA1-02 Area & GETR-BA1-02) through GE-BA1-04)

C, (pg/L) 1,720.0 1,132.5 Cmax

( M9/L) 1,720.0 1,132.5 Flow Rate (gpm) 14 86 R 50.4 13.1 PV r _r _(-Q/(PV*R))t (liters) 2,549,098 25,964,863 Q

(liters/day) 76,314 468,785 Area (ft2) _ 76,285 Time Required for Initial Cone, to Reach Max. Level (months) 0 0 ug/L Combined Cumulative Time WEIGHTED Influent Flow A B3 (Months) AVERAGE Rate Months Days Notes 0 1,720.0 1,132.5 1,214.79 100 - -

1 1,689.2 1,085.9 1,170.39 100 1 30.42 2 1,659.0 1,041.2 1,127.71 100 2 60.84 3 1,629.2 998.4 1,086.70 100 3 91.26 4 1,600.1 957.3 1,047.27 100 4 121.68 5 1,571.4 917.9 1,009.37 100 5 152.10 6 1,543.3 880.1 972.94 100 6 182.52 7 1,515.6 843.9 937.92 100 7 212.94 8 1,488.5 809.1 904.25 100 8 243.36 9 1,461.8 775.8 871.87 100 9 273.78 10 1,435.7 743.9 840.74 100 10 304.20 11 1,410.0 713.3 810.81 100 11 334.62 12 1,384.7 683.9 782.03 100 12 365.04 13 1,359.9 655.8 754.35 100 13 395.46 14 1,335.6 628.8 727.72 100 14 425.88 15 1,311.6 602.9 702.12 100 15 456.30 16 1.288.2 578.1 677.49 100 16 486.72 17 1,265.1 554.3 653.80 100 17 517.14 18 1,242.4 531.5 631.00 100 18 547.56 19 1,220.2 509.6 609.08 100 19 577.98 20 1,198.3 488.6 587.98 100 20 608.40 21 1,176.9 468.5 567.68 100 21 638.82 22 1,155.8 449.2 548.14 100 22 669.24 23 1,135.1 430.7 529.34 100 23 699.66 24 1,114.8 413.0 511.25 100 24 730.08 25 1,094.8 396.0 493.84 100 25 760.50 26 1,075.2 379.7 477.07 100 26 790.92 27 1,056.0 364.1 460.94 100 27 821.34 28 1,037.0 349.1 445.40 100 28 851.76 29 1,018.5 334.7 430.44 100 29 882.18 30 1,000.2 320.9 416.04 100 30 912.60 31 982.3 307.7 402.17 100 31 943.02 32 964.7 295.1 388.82 100 32 973.44 33 947.5 282.9 375.96 100 33 1,003.86 34 930.5 271.3 363.56 100 34 1,034.28 35 913.8 260.1 351.63 100 35 1,064.70 36 897.5 249.4 340.13 100 36 1,095.12 37 881.4 239.1 329.05 100 37 1,125.54 38 865.6 229.3 318.38 100 38 1,155.96 39 850.1 219.9 308.09 100 39 1,186.38 40 834.9 210.8 298.18 100 40 1,216.80 41 819.9 202.1 288.62 100 41 1,247.22 42 805.3 193.8 279.41 100 42 1,277.64 43 790.8 185.8 270.53 100 43 1,308.06 44 776.7 178.2 261.97 100 44 1,338.48 45 762.8 170.8 253.72 100 45 1,368.90 46 749.1 163.8 245.76 100 46 1,399.32 47 735.7 157.1 238.08 100 47 1,429.74 48 722.5 150.6 230.68 100 48 1,460.16 49 709.6 144.4 223.53 100 49 1,490.58 50 696.9 138.5 216.64 100 50 1,521.00 51 684.4 132.8 209.99 100 51 1,551.42 52 672.1 127.3 203.58 100 52 1,581.84 53 660.1 122.1 197.39 100 53 1,612.26 54 648.3 117.0 191.41 100 54 1,642.68 55 636.7 112.2 185.64 100 55 1,673.10 56 625.3 107.6 180.07 100 56 1,703.52 57 614.1 103.2 174.70 100 57 1,733.94 58 603.1 98.9 169.51 100 58 1,764.36 59 592.3 94.9 164.49 100 59 1,794.78 60 581.7 90.9 159.65 100 60 1,825.20 61 571.3 87.2 154.97 100 61 1,855.62 I 62 561.0 83.6 150.45 100 62 1,886.04 According to remediation duration calculations, the uranium DCGL is achieved in Area B in 61.7 months.

63 551.0 80.2 146.09 100 63 1,916.46 64 541.1 76.9 141.87 100 64 1,946.88 65 531.4 73.7 137.79 100 65 1,977.30 66 521.9 70.7 133.85 100 66 2,007.72 67 512.6 67.8 130.04 100 67 2,038.14 68 503.4 65.0 126.35 100 68 2,068.56 69 494.4 62.3 122.79 100 69 2,098.98 70 485.5 59.7 119.35 100 70 2,129.40 71 476.8 57.3 116.02 100 71 2,159.82 72 468.3 54.9 112.79 100 72 2,190.24 73 459.9 52.7 109.67 100 73 2,220.66 74 451.7 50.5 106.66 100 74 2,251.08 75 443.6 48.4 103.74 100 75 2,281.50 76 435.6 46.4 100.91 100 76 2,311.92 77 427.8 44.5 98.18 100 77 2,342.34 78 420.2 42.7 95.53 100 78 2,372.76 79 412.6 40.9 92.96 100 79 2,403.18 80 405.3 39.2 90.48 100 80 2,433.60 81 398.0 37.6 88.08 100 81 2,464.02 82 390.9 36.1 85.75 100 82 2,494.44 83 383.9 34.6 83.49 100 83 2,524.86 84 377.0 33.2 81.30 100 84 2,555.28 85 370.2 31.8 79.18 100 85 2,585.70 86 363.6 30.5 77.13 100 86 2,616.12 87 357.1 29.2 75.14 100 87 2,646.54 88 350.7 28.0 73.21 100 88 2,676.96 89 344.4 26.9 71.34 100 89 2,707.38 90 338.3 25.8 69.52 100 90 2,737.80 91 332.2 24.7 67.76 100 91 2,768.22 92 326.3 23.7 66.05 100 92 2,798.64 93 320.4 22.7 64.40 100 93 2,829.06 94 314.7 21.8 62.79 100 94 2,859.48 95 309.0 20.9 61.23 100 95 2,889.90 96 303.5 20.0 59.72 100 96 2,920.32 97 298.1 19.2 58.25 100 97 2,950.74 98 292.7 18.4 56.82 100 98 2,981.16 99 287.5 17.7 55.43 100 99 3,011.58 100 282.3 16.9 54.09 100 100 3,042.00 101 277.3 16.2 52.78 100 101 3,072.42 102 272.3 15.6 51.51 100 102 3,102.84 103 267.4 14.9 50.28 100 103 3,133.26 104 262.7 14.3 49.08 100 104 3,163.68 105 258.0 13.7 47.91 100 105 3,194.10 106 253.3 13.2 46.78 100 106 3,224.52 1 of 2

BA1 Uranium Influent Concentration Analysis 08/30/2022 Water Treatment Design Basis BA1 Combined Influent - Uranium BA1-A1 (GETR-BA1-01 BA1-B3 (GE-BA1-02 Area & GETR-BA1-02) through GE-BA1-04)

C, (Mg/L) 1,720.0 1,132.5 Cmax (Mg/L) 1,720.0 1,132.5 Flow Rate (gpm) 14 86 R 50.4 13.1 PV r _r o(-0/(PV*R))t (liters) 2,549,098 25,964,863 '-t M)e Q

(liters/day) 76,314 468,785 Area (ft2) _ 76,285 Time Required for Initial Cone, to Reach Max. Level (months) 0 0 ug/L Combined Cumulative Time WEIGHTED Influent Flow A B3 (Months) AVERAGE Rate Months Days Notes 107 248.8 12.6 45.68 100 107 3,254.94 108 244.3 12.1 44.61 100 108 3,285.36 109 240.0 11.6 43.57 100 109 3,315.78 110 235.7 11.1 42.56 100 110 3,346.20 111 231.5 10.7 41.57 100 111 3,376.62 112 227.3 10.2 40.61 100 112 3,407.04 113 223.2 9.8 39.68 100 113 3,437.46 114 219.2 9.4 38.78 100 114 3,467.88 115 215.3 9.0 37.89 100 115 3,498.30 116 211.5 8.6 37.03 100 116 3,528.72 117 207.7 8.3 36.20 100 117 3,559.14 118 204.0 7.9 35.39 100 118 3,589.56 119 200.3 7.6 34.59 100 119 3,619.98 120 196.7 7.3 33.82 100 120 3,650.40 121 193.2 7.0 33.07 100 121 3,680.82 122 189.7 6.7 32.34 100 122 3,711.24 123 186.3 6.4 31.62 100 123 3,741.66 124 183.0 6.2 30.93 100 124 3,772.08 125 179.7 5.9 30.25 100 125 3,802.50 126 176.5 5.7 29.59 100 126 3,832.92 Combined influent concentration reaches MCL in 126 months 127 173.3 5.4 28.95 100 127 3,863.34 128 170.2 5.2 28.32 Too-1 128 3,893.76 129 167.2 5.0 27.71 100 129 3,924.18 130 164.2 4.8 27.11 100 130 3,954.60 131 161.3 4.6 26.53 100 131 3,985.02 132 158.4 4.4 25.96 100 132 4,015.44 133 155.5 4.2 25.41 100 133 4,045.86 134 152.7 4.1 24.87 100 134 4,076.28 135 150.0 3.9 24.34 100 135 4,106.70 136 147.3 3.7 23.83 100 136 4,137.12 137 144.7 3.6 23.33 100 137 4,167.54 138 142.1 3.4 22.84 100 138 4,197.96 139 139.5 3.3 22.36 100 139 4,228.38 140 137.1 3.2 21.90 100 140 4,258.80 141 134.6 3.0 21.44 100 141 4,289.22 142 132.2 2.9 21.00 100 142 4,319.64 143 129.8 2.8 20.56 100 143 4,350.06 144 127.5 2.7 20.14 100 144 4,380.48 145 125.2 2.6 19.73 100 145 4,410.90 146 123.0 2.4 19.32 100 146 4,441.32 147 120.8 2.3 18.93 100 147 4,471.74 148 118.6 2.3 18.54 100 148 4,502.16 149 116.5 2.2 18.16 100 149 4,532.58 150 114.4 2.1 17.80 100 150 4,563.00 According to remediation duration calculations, the uranium DCGL is achieved in Area A in 149.1 months.

2 of 2 4 - WA-BA1 Nitrate Combined Effluent Analysis Results Western Area, BA1 Effluent Analysis 12/7/2020 60% Water Treatment Design Input BA1, Western Area - Nitrate Combined Is C; representative Combined Effluent Combined Effluent Ci Ci Cmax Cmax of Cmax? PV1 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-B3 (GE-BA1-02 through GE-BA1-04) 0 0 13 916,942 25,964,863 BA1-B3R (GE-BA1-02 through GE-BA1-04) 0 0 - 13 366,168 10,368,706 22.09 22.09 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-01) 38.60 FWCA 38.60 FWCA Y 10.87 3,014 85,334 Notes:

Cl - 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 (09-09-22)].

Western Area, BA1 Effluent Concentration Analysis 10/5/2022 Water Treatment Design Basis Western Area, BA1 Combined Effluent - Nitrate WAA U>DCGL (GE- BA1 Q Re- WA Q-1206-NORTH (GETR-WAA-02 through GE- BA1 Injection Reinjection Area WU-01)

WAA-05) (9P_mj (gpm) c1 (mg/L) 38.12 38.60 0.00 C2 (mg/L) 27.46 0.00

^3 (mg/L) 32.86 0.00 28 8 c4 (mg/L) 33.48 0.00 c5 (mg/L) 23.76 0.00 Flow Rate (gpm) 99 8 100 R 4.6 10.9 PV (liters) 664,087,208 85,334 Q

(liters/day) 539,648 43,608 r _r_o('Q/(pv*R))t 1

Time Required for Initial Cone, to Reach Max. Level (months) 0 0 INFLUENT BA1-WA Cumulative Time WEIGHTED Combined (Months) WAA U>DCGL 1206-NORTH AVERAGE Effluent Months Days Notes 0 38.117374 38.600000 38.15 22.09 0 0.0 Year 1 Cone.

1 38.117374 9.239573 35.96 20.82 1 30.4 2 38.117374 2.211651 35.43 20.51 2 60.8 3 38.117374 0.529397 35.31 20.44 3 91.3 4 38.117374 0.126720 35.28 20.42 4 121.7 5 38.117374 0.030333 35.27 20.42 5 152.1 6 38.117374 0.007261 35.27 20.42 6 182.5 7 38.117374 0.001738 35.27 20.42 7 212.9 8 38.117374 0.000416 35.27 20.42 8 243.4 9 38.117374 0.000100 35.27 20.42 9 273.8 10 38.117374 0.000024 35.27 20.42 10 304.2 11 38.117374 0.000006 35.27 20.42 11 334.6 12 38.117374 0.000001 35.27 20.42 12 365.0 13 27.456667 0.000000 25.40 14.71 13 395.5 Year 2 Cone.

14 27.456667 0.000000 25.40 14.71 14 425.9 15 27.456667 0.000000 25.40 14.71 15 456.3 16 27.456667 0.000000 25.40 14.71 16 486.7 17 27.456667 0.000000 25.40 14.71 17 517.1 18 27.456667 0.000000 25.40 14.71 18 547.6 19 27.456667 0.000000 25.40 14.71 19 578.0 20 27.456667 0.000000 25.40 14.71 20 608.4 21 27.456667 0.000000 25.40 14.71 21 638.8 22 27.456667 0.000000 25.40 14.71 22 669.2 23 27.456667 0.000000 25.40 14.71 23 699.7 24 27.456667 0.000000 25.40 14.71 24 730.1 25 32.858081 0.000000 30.40 17.60 25 760.5 Year 3 Cone.

26 32.858081 0.000000 30.40 17.60 26 790.9 27 32.858081 0.000000 30.40 17.60 27 821.3 28 32.858081 0.000000 30.40 17.60 28 851.8 29 32.858081 0.000000 30.40 17.60 29 882.2 30 32.858081 0.000000 30.40 17.60 30 912.6 31 32.858081 0.000000 30.40 17.60 31 943.0 32 32.858081 0.000000 30.40 17.60 32 973.4 33 32.858081 0.000000 30.40 17.60 33 1003.9 34 32.858081 0.000000 30.40 17.60 34 1034.3 35 32.858081 0.000000 30.40 17.60 35 1064.7 36 32.858081 0.000000 30.40 17.60 36 1095.1 37 33.477071 0.000000 30.97 17.93 37 1125.5 Year 4 Cone., Reset to t = 0 38 33.298427 0.000000 30.81 17.84 38 1156.0 39 33.120736 0.000000 30.64 17.74 39 1186.4 40 32.943993 0.000000 30.48 17.65 40 1216.8 41 32.768194 0.000000 30.32 17.55 41 1247.2 42 32.593332 0.000000 30.16 17.46 42 1277.6 43 32.419404 0.000000 30.00 17.37 43 1308.1 44 32.246404 0.000000 29.84 17.27 44 1338.5 45 32.074327 0.000000 29.68 17.18 45 1368.9 46 31.903168 0.000000 29.52 17.09 46 1399.3 47 31.732923 0.000000 29.36 17.00 47 1429.7 48 31.563586 0.000000 31.56 18.27 48 1460.2 1206 North Discontinued 49 31.395153 0.000000 31.40 18.18 49 1490.6 50 31.227618 0.000000 31.23 18.08 50 1521.0 51 31.060978 0.000000 31.06 17.98 51 1551.4 52 30.895227 0.000000 30.90 17.89 52 1581.8 1 of 3

Western Area, BA1 Effluent Concentration Analysis 10/5/2022 Water Treatment Design Basis Western Area, BA1 Combined Effluent - Nitrate WAA U>DCGL (GE- BA1 Q Re- WA Q-1206-NORTH (GETR-WAA-02 through GE- BA1 Injection Reinjection Area WU-01)

WAA-05) (9Pm) (oem)

Ci (mg/L) 38.12 38.60 0.00 C2 (mg/L) 27.46 0.00

^3 (mg/L) 32.86 0.00 28 8 c4 (mg/L) 33.48 0.00 c5 (mg/L) 23.76 0.00 Flow Rate (gpm) 99 8 100 R 4.6 10.9


PV (liters) 664,087,208 85,334 Q

(liters/day) 539,648 43,608 c _r J-Q/(PV*R))t Time Required for Initial Cone, to Reach Max. Level (months) 0 0 INFLUENT BA1-WA Cumulative Time WEIGHTED Combined (Months) WAA U>DCGL 1206-NORTH AVERAGE Effluent Months Days Notes 53 30.730360 0.000000 30.73 17.79 53 1612.3 54 30.566373 0.000000 30.57 17.70 54 1642.7 55 30.403262 0.000000 30.40 17.60 55 1673.1 56 30.241020 0.000000 30.24 17.51 56 1703.5 57 30.079645 0.000000 30.08 17.41 57 1733.9 58 29.919130 0.000000 29.92 17.32 58 1764.4 59 29.759472 0.000000 29.76 17.23 59 1794.8 60 29.600667 0.000000 29.60 17.14 60 1825.2 61 29.442708 0.000000 29.44 17.05 61 1855.6 62 29.285593 0.000000 29.29 16.95 62 1886.0 63 29.129315 0.000000 29.13 16.86 63 1916.5 64 28.973872 0.000000 28.97 16.77 64 1946.9 65 28.819259 0.000000 28.82 16.68 65 1977.3 66 28.665470 0.000000 28.67 16.60 66 2007.7 67 28.512502 0.000000 28.51 16.51 67 2038.1 68 28.360350 0.000000 28.36 16.42 68 2068.6 69 28.209011 0.000000 28.21 16.33 69 2099.0 70 28.058478 0.000000 28.06 16.24 70 2129.4 71 27.908750 0.000000 27.91 16.16 71 2159.8 72 27.759820 0.000000 27.76 16.07 72 2190.2 73 27.611685 0.000000 27.61 15.99 73 2220.7 74 27.464340 0.000000 27.46 15.90 74 2251.1 75 27.317782 0.000000 27.32 15.82 75 2281.5 76 27.172005 0.000000 27.17 15.73 76 2311.9 77 27.027007 0.000000 27.03 15.65 77 2342.3 78 26.882782 0.000000 26.88 15.56 78 2372.8 79 26.739327 0.000000 26.74 15.48 79 2403.2 80 26.596638 0.000000 26.60 15.40 80 2433.6 81 26.454710 0.000000 26.45 15.32 81 2464.0 82 26.313539 0.000000 26.31 15.23 82 2494.4 83 26.173122 0.000000 26.17 15.15 83 2524.9 84 26.033454 0.000000 26.03 15.07 84 2555.3 85 25.894531 0.000000 25.89 14.99 85 2585.7 86 25.756350 0.000000 25.76 14.91 86 2616.1 87 25.618906 0.000000 25.62 14.83 87 2646.5 88 25.482196 0.000000 25.48 14.75 88 2677.0 89 25.346215 0.000000 25.35 14.67 89 2707.4 90 25.210959 0.000000 25.21 14.60 90 2737.8 91 25.076426 0.000000 25.08 14.52 91 2768.2 92 24.942610 0.000000 24.94 14.44 92 2798.6 93 24.809508 0.000000 24.81 14.36 93 2829.1 94 24.677117 0.000000 24.68 14.29 94 2859.5 95 24.545432 0.000000 24.55 14.21 95 2889.9 96 24.414450 0.000000 24.41 14.13 96 2920.3 97 24.284167 0.000000 24.28 14.06 97 2950.7 98 24.154579 0.000000 24.15 13.98 98 2981.2 99 24.025682 0.000000 24.03 13.91 99 3011.6 100 23.897474 0.000000 23.90 13.84 100 3042.0 101 23.769949 0.000000 23.77 13.76 101 3072.4 102 23.643106 0.000000 23.64 13.69 102 3102.8 103 23.516938 0.000000 23.52 13.62 103 3133.3 104 23.391445 0.000000 23.39 13.54 104 3163.7 105 23.266621 0.000000 23.27 13.47 105 3194.1 106 23.142463 0.000000 23.14 13.40 106 3224.5 2 of 3

Western Area, BA1 Effluent Concentration Analysis 10/5/2022 Water Treatment Design Basis Western Area, BA1 Combined Effluent - Nitrate WAA U>DCGL (GE- BA1 Q Re- WA Q-1206-NORTH (GETR-WAA-02 through GE- BA1 Injection Reinjection Area WU-01)

WAA-05) (gpm) (gpm)

Ci (mg/L) 38.12 38.60 0.00 C2 (mg/L) 27.46 0.00

^3 (mg/L) 32.86 0.00 28 8 c4 (mg/L) 33.48 0.00 c5 (mg/L) 23.76 0.00 Flow Rate (gpm) 99 8 100 R 4.6 10.9 PV (liters) 664,087,208 85,334 Q

(liters/day) 539,648 43,608 r =r J-Q/(PV*R))t T

Time Required for Initial Cone, to Reach Max. Level (months) 0 0 INFLUENT BA1-WA Cumulative Time WEIGHTED Combined (Months) WAA U>DCGL 1206-NORTH AVERAGE Effluent Months Days Notes 107 23.018967 0.000000 23.02 13.33 107 3254.9 108 22.896131 0.000000 22.90 13.26 108 3285.4 109 22.773950 0.000000 22.77 13.18 109 3315.8 110 22.652421 0.000000 22.65 13.11 110 3346.2 111 22.531540 0.000000 22.53 13.04 111 3376.6 112 22.411305 0.000000 22.41 12.97 112 3407.0 113 22.291711 0.000000 22.29 12.91 113 3437.5 114 22.172756 0.000000 22.17 12.84 114 3467.9 115 22.054435 0.000000 22.05 12.77 115 3498.3 116 21.936746 0.000000 21.94 12.70 116 3528.7 117 21.819684 0.000000 21.82 12.63 117 3559.1 118 21.703247 0.000000 21.70 12.57 118 3589.6 119 21.587432 0.000000 21.59 12.50 119 3620.0 120 21.472235 0.000000 21.47 12.43 120 3650.4 121 21.357652 0.000000 21.36 12.36 121 3680.8 122 21.243681 0.000000 21.24 12.30 122 3711.2 123 21.130318 0.000000 21.13 12.23 123 3741.7 124 21.017560 0.000000 21.02 12.17 124 3772.1 125 20.905404 0.000000 20.91 12.10 125 3802.5 126 20.793846 0.000000 20.79 12.04 126 3832.9 127 20.682884 0.000000 20.68 11.97 127 3863.3 128 20.572513 0.000000 20.57 11.91 128 3893.8 129 20.462732 0.000000 20.46 11.85 129 3924.2 130 20.353536 0.000000 20.35 11.78 130 3954.6 131 20.244923 0.000000 20.24 11.72 131 3985.0 132 20.136890 0.000000 20.14 11.66 132 4015.4 133 20.029433 0.000000 20.03 11.60 133 4045.9 134 19.922550 0.000000 19.92 11.53 134 4076.3 135 19.816237 0.000000 19.82 11.47 135 4106.7 3 of 3