ML21076A477
Text
Attachment 9.2 - Remediation Duration Estimate Calculations: WA
Remediation and Water Treatment Duration Estimate Calculations WAA U>DCGL (Alluvium/Transition Zone/SSB)
GE-WAA-01 :04 Table 1: Retardation Calculation Bulk Density W_ml) 1.81 Porosity [n]1 0.3 Table 2: Remediation Pore Volume Calculation Area of Plume [A]
(ft2)
Porosity [n]1 732,905 0.3 Nitrate Kd (ml/g)2 0.6 Average Plume Thickness [b]3 (ft) 19 Pore Volume (ft3)
[PV = b*n*A]
4,177,559 R=i. + e.J::K.
n c:
Retardation 4.62 Pore Volume [PV)
(gallons) 31,248,138 Table 3: Estimated Initial A_g_ueous-Phase Contaminant Concentration I
I Qs I
- P' I. \\,~ \\(
Initial Aqueous-Phase Contaminant Concentration
(
Concentration Basis (mg/L)
Remarks
\\-
Incremental Averaging of Concentrations within Remediation Area 39.26 Average nitrate concentration Maximum Representative Concentration within Remediation Area 139.00 Representative nitrate concentration for WELL T-63 Table 4: Estimated Number of Pore Volumes to Achieve Remediation Goal (22.9 rt1g/_l,)_
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~
I Initial Aqueous-Phase Nitrate Cleanup Contaminant Concentration Concentration No. of Pore Volumes6 R
(mg/L) 4 (mg/L)5
(#PV = -R ln(Cleanup/lnitial)]
Remarks I
Pore volumes required to achieve cleanup goal and WAA U>DCG L - Nitrate 4.62 22.9 139 8.3 discontinue remediation Table 5: Estimated Time to Achieve Remediation Goal (22.~ u_g/_L)
No. of Pore Volumes
8.3 Definitions
ml-milliliters g-gram ft 3
- cubic feet Kd - distribution coefficient ug - microgram L - liter gpm - gallons per minute gpd - gallons per day Pore Volume (gallons) 31,248,138 DCGL - derived cleanup goal level ACL - alternative contaminant level Flow Rate Flow Rate Duration Estimate (gpm)7 (gpd)
Duration Estimate (days)
(months)
Remarks Time to achieve cleanup goal and 99 142,560 1,826 60.1 discontinue remediation.
Notes:
1Assumes 30% transmissve porosity for alluvial sand, as presented in the Technical Memorandum (TM002), September 10, 2018, page 3.
2Kd derived from previous studies as mentioned in the Technical Memorandum (TM002), September 10, 2018, page 4.
3Saturated zone thickness assumed to be 16 feet, as presented in the Technical Memorandum (TM002), September 10, 2018, page 5.
4Remediation will be discontinued when the nitrate groundwater concentration reaches the ACL (22.9 mg/L) 5The larger of the following is assumed as initial nitrate 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 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 located within the remediation area (see Iner. AWCA Calcs_Rev. C (09-05-18}.xlsx ). Initial aqueous-phase contaminant concentrations will be variable.
6Number of pore volumes assumes linear, reversible and instantaneous sorption, and may result in an underestimation of cleanup timeframe estimates.
7Flow 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 WAA U>DCGL (Alluvium/Transition Zone/SSB)
/
Uranium Table 1: Retardation Calculation Bulk Density (g/ml_l 1.81 Porosi!Y_[_r1}1 0.3 Table 2: Remediation Pore Volume Calculation Area of Plume [A]
(ft2)
Porosity (n]1 732,905 0.3 Uranium Kd
_{_rrll/_j}2 Average Plume Thickness (b]3 (ft) 19 R = 1 +~K n
a
/
/
19**"""" *
Retardation [R}
13.07 GeJ...J..10 Pore Volume (ft3)
Pore Volume [PV]
[PV= b*n*A]
(gallons) 4,177,559 31,248,138 Table 3: Estimated Initial A_g_ueous-Phase Contaminant Concentration
/
Initial Aqueous-Phase Contaminant Concentration
/
Concentration Basis (ug/L)
Remarks Incremental Averaging of Concentrations within Remediation Area 76.16 Average uranium concentration Maximum Representative Concentration within Remediation Area 177.80 Representative uranium concentration for WELL T-62
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<::::, - W AA U>DCGL - Uranium "ir o.-**~ l
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Table 4a: Estimated Number of Pore Volumes to Achieve Remediation Goal (119 ug/L)
Y1 Uranium Cleanup Initial Aqueous-Phase
~
Concentration Contaminant Concentration No. of Pore Volumes 6
E R
(ug/L) 4 (ug/L)5
[#PV = -R ln(Cleanup/lnitial)]
Remarks
~
Pore volumes required to achieve cleanup goal (DCGL) and C
13.07 119 178 5.2 discontinue remediation 0
~
Table Sa: Estimated Time to Achieve Remediation Goal (119 ug/L)
Cl
..J Pore Volume Flow Rate Flow Rate Duration Estimate
\\!)
u (gpm)7 Cl No. of Pore Volumes (gallons)
(gpd)
Duration Estimate (days)
(months)
Remarks Time to achieve cleanup goal (DCGL) and 5.2 31,248,138 99 142,560 1,150 37.9 discontinue remediation.
3.16 Table 4b: Estimated Number of Pore Volumes to Achieve Remediation Goal (30 ug/L)
Uranium Cleanup Initial Aqueous-Phase B
Concentration Contaminant Concentration No. of Pore Volumes6 e
R (ug/L)
(ug/L)5
[#PV = *R ln(Cleanup/lnitial)I Remarks
~
13.07 30 178 23.3 Pore volumes required to achieve cleanup goal (MCL) and C
0
~
Table Sb: Estimated Time to Achieve Remediation Goal (30 ug/L)
Cl
..J u
~
No. of Pore Volumes Definitions:
ml-milliliters g-gram ft 3
- cubic feet Kd - distribution coefficient ug - microgram pCi/L - picocu ries per liter L - liter gpm - gallons per minute gpd - gallons per day DCGL - derived cleanup goal level MCL - maximum contaminant level 23.3 Pore Volume Flow Rate Flow Rate (gallons)
(gpm)7 (gpd)
Duration Estimate (days) 31,248,138 99 142,560 5,097 Notes:
1Assumes 30% transmissve porosity for alluvial sand, as presented in the Technical Memorandum (TM002), September 10, 2018, page 3.
2Kd derived from previous studies as mentioned in the Technical Memorandum (TM002), September 10, 2018, page 4.
3Saturated zone thickness assumed to be 16 feet, as presented in t he Technical Memorandum (TM002), September 10, 2018, page 5.
Duration Estimate (months)
Remarks Time to achieve cleanup goal (MCL) and 167.6 discontinue remediation.
4Remediation will be discontinued when the uranium groundwater concentration reaches 119 ug/L, the equivalent of 180 pCi/L as calcuated in Uranium Activity vs. Mass Concentration_Rev. A (07-30-18}.xlsx, and 30 ug/L.
5The larger of the fol lowing 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 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 located within the remediation area (see Iner. AWCA Ca/cs_Rev. C (09-05-18}. xlsx ). Initial aqueous-phase contaminant concentrations will be variable.
6Number of pore volumes assumes linear, reversible and instantaneous sorption, and may result in an underestimation of cleanup timeframe estimates.
7Flow 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 requi red 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 WU-UP1 (SSA)
Table 1: Retardation Calculation Bulk Density Nitrate Kd (g/ml)
Porosity (n]1 (mf/g)2 1.81 0.1 0.6 Table 2: Remediation Pore Volume Calculation Average Plume Area of Plume [A]
Thickness (b]3 (ft2)
Porosity (n]1 (ft) 484,310 0.1 8
Pore Volume (ft3)
(PV = b*n*A]
387,448 R = 1 + Pi.lK" n
Retardation [R) 11.86 Pore Volume (PV]
(gallons) 2,898,111
~
Table 3: Estimated Initial A_g_ueous-Phase Contaminant Concentration
- "~"'-,
Initial Aqueous-Phase Contaminant Concentration Concentration Basis (mg/L)
Incremental Averaging of Concentrations within Remediation Area 203.88 Maximum Representative Concentration within Remediation Area 379.70 Remarks Average nitrate concentration Representative nitrate concentration for WELL 1321
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WU-UPl - Nitrate Table 4: Estimated Number of Pore Volumes to Achieve Remediation Goal (22.9 mg_/L)
Nitrate Cleanup Initial Aqueous-Phase Concentration Contaminant Concentration No. of Pore Volumes 6
R (mg/L)4 (mg/L) 5
[#PV = -R ln(Cleanup/lnitial)]
Remarks Pore volumes required to achieve cleanup goal and 11.86 22.9 380 33.3 discontinue remediation Table 5: Estimated Time to Achieve Remediation Goal (22.9 ug/L)
No. of Pore Volumes 33.3 Definitions:
ml - milliliters g-gram ft 3
- cubic feet Kd - distribution coefficient ug - microgram L-liter gpm - gallons per minute gpd - gallons per day Pore Volume (gallons) 2,898,111 DCGL - derived cleanup goal level ACL-alternative contaminant level Flow Rate Flow Rate Duration Estimate (gpm)7 (gpd)
Duration Estimate (days)
(months)
Remarks Time to achieve cleanup goal and 44 63,360 1,523 50.1 discontinue remediation.
Notes:
1Assumes 30% transmissve porosity for alluvial sand, as presented in the Technical Memorandum (TM002), September 10, 2018, page 3.
2 Kd derived from previous studies as mentioned in the Technical Memorandum (TM002), September 10, 2018, page 4.
3Saturated zone thickness assumed to be 8 feet, as presented in the Technical Memorandum (TM002), September 10, 2018, page 5.
4Remediation will be discontinued when the nitrate groundwater concentration reaches the ACL (22.9 mg/L).
5The larger of the following is assumed as initial nitrate 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 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 located within the remediation area (see Iner. AWCA Calcs_Rev. C {09-05-18).xlsx ). Initial aqueous-phase contaminant concentrations will be variable.
6Number of pore volumes assumes linear, reversible and instantaneous sorption, and may result in an underestimation of cleanup timeframe estimates.
7Flow rate is based on the nominal combined groundwater injection rate for extraction trenches GWI-UPl -02 through GWI-UPl-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 WU-UP1 (SSA)
Uranium Table 1: Retardation Calculation Bulk Density I (g/ml) 1.81 Porosity [n]1 0.1 Table 2: Remediation Pore Volume Calculation Area of Plume [A)
(ft2)
Porosity [n) 1 484,310 0.1 I
I Uranium Kd (mf/g)2 Average Plume Thickness [b]
3 (ft) 8 I
I I
I Pore Volume (ft3)
[PV = b*n*A]
387,448 R :;;;; 1 + !:.EK0 n
Retardation [RI 55.30 Pore Volume [PV)
(gallons) 2,898,111
/_,,., -
Table 3: Estimated Initial Agueous-Phase Contaminant Concentration Initial Aqueous-Phase Contaminant Concentration Concentration Basis (ug/L)
Remarks Incremental Averaging of Concentrat ions within Remediation Area 15.61 Average uranium concentration Maximum Representative Concentration within WU-UPl - Uranium Remed iation Area 22.11 Representative uranium concentration for WELL 1312 Table 4: Estimated Number of Pore Volumes to Achieve Remediation Goal (30 ug/L)
Uranium Cleanup Initial Aqueous-Phase Concentration Contaminant Concentration No. of Pore Volumes 6
R (ug/L) 4 (ug/L)s
[#PV = -R ln(Cleanup/lnitial)]
Remarks Pore volumes required to achieve cleanup goal (MCL) and 55.30 30 22 0.0 discontinue remediation Table 5: Estimated Time to Achieve Remediation Goal (30 !J_g{_I.)_
No. of Pore Volumes
0.0 Definitions
ml-milliliters g - gram ft 3 - cubic feet Kd - distribution coefficient ug - microgram L-liter gpm - gallons per minute gpd - gallons per day Pore Volume (gallons) 2,898,111 DCGL - derived cleanup goal level MCL - maximum contaminant level Flow Rate Flow Rate Duration Estimate (gpm)7 (gpd)
Duration Estimate (days)
(months)
Remarks Time to achieve cleanup goal (MCL) and 44 63,360 0
0.0 discontinue remediation.
Notes:
1Assumes 30% transmissve porosity for alluvial sand, as presented in the Technical Memorandum (TM002), September 10, 2018, page 3.
2Kd derived from previous studies as mentioned in the Technical Memorandum (TM002), September 10, 2018, page 4.
3Saturated zone thickness assumed to be 8 feet, as presented in the Technical Memorandum (TM002), September 10, 2018, page 5.
4Remediation will be discontinued when the uranium groundwater concentration reaches the MCL (30 ug/L).
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 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 located within the remediation area (see Iner. AWCA Calcs_Rev. C (09 18}.xlsx ). Initial aqueous-phase contaminant concentrations will be variable.
6Number of pore volumes assumes linear, reversible and instantaneous sorption, and may result in an underest imation of cleanup timeframe estimates.
7Flow rate is Jased on the nominal combined groundwater injection rate for extraction trenches GWI-UPl -02 through GWI-UPl -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. Est imates 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 WU-UP2-SSA Table 1: Retardation Calculation Bulk Density (g/ml)
Porosity [n]1 1.81 0.1 Table 2: Remediation Pore Volume Calculation Area of Plume [A]
(ft2)
Porosity [n)1 419,878 0.1 Nitrate Kd (ml/g) 2 0.6 Average Plume Thickness [b]3 (ft) 8 Pore Volume (ft3)
[PV= b*n*A]
335,903 R = 1 + p "'K*
n a
Retardation [R]
11.86 Pore Volume [PV]
(gallons) 2,512,551 Table 3: Estimated Initial Aqueous-Phase Contaminant Concentration
'-._'3/4.
~
/
Initial Aqueous-Phase Contaminant Concentration Concentration Basis (mg/L)
Remarks Incremental Averaging of Concentrations within
'~
-L WU-UP2 _ Nitrate Remediation Area 379.27 Average nitrate concentration Maximum Representative Concentration within Remediation Area 1,006.00 Representative nitrate concentration for WELL 1385 Table 4: Estimated Number of Pore Volumes to Achieve Remediation Goal (22.9 m_g_/L)
Nitrate Cleanup Initial Aqueous-Phase Concentration Contaminant Concentration No. of Pore Volumes 6
R (mg/L) 4 (mg/L)5
(#PV = -R ln(Cleanup/lnitial))
Remarks Pore volumes required to achieve cleanup goal and 11.86 22.9 1,006 44.9 discontinue remediation Table 5: Estimated Time to Achieve Remediation Goal g2.9 ug/L)
No. of Pore Volumes 44.9 Definitions:
ml - milliliters g-gram ft 3
- cubic feet Kd - distribution coefficient ug - microgram L-liter gpm - gallons per minute gpd - gallons per day Pore Volume (gallons) 2,512,551 DCGL - derived cleanup goal level ACL - alternative contaminant level Flow Rate Flow Rate Duration Estimate (gpm)7 (gpd)
Duration Estimate (days)
(months)
Remarks Time to achieve cleanup goal and 56 80,640 1,398 46.0 discontinue remediation.
Notes:
1Assumes 30% transmissve porosity for alluvial sand, as presented in the Technical Memorandum (TM002), September 10, 2018, page 3.
2Kd derived from previous studies as mentioned in the Technical Memorandum (TM002), September 10, 2018, page 4.
3Saturated zone thickness assumed to be 8 feet, as presented in the Technical Memorandum (TM002), September 10, 2018, page 5.
4Remediation will be discontinued when the nitrate groundwater concentration reaches the ACL (22.9 mg/L).
5The larger of the following is assumed as initial nitrate 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 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 located within the remediation area (see Iner. AWCA Calcs_Rev. C {09-05-18).xlsx ). Initial aqueous-phase contaminant concentrations will be variable.
6Number of pore volumes assumes linear, reversible and instantaneous sorption, and may result in an underestimation of cleanup timeframe estimates.
7Flow rate is based on the nominal combined groundwater injection rate for extraction trenches GWI-UPl-02 through GWI-UPl -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 WU-UP2-SSA Uranium Table 1: Retardation Calculation Bulk Density (g/ml)
Porosity [n)1 1.81 0.1 Table 2: Remediation Pore Volume Calculation Area of Plume [A]
(ft2)
Porosity [n]1 419,925 0.1 Uranium Kd (ml/g)2 3
Average Plume Thickness [b]
3 Pore Volume (ft3)
(ft)
[PV = b*n*A]
8 335,940 R =: l +~K, n
Retardation [R]
55.30 Pore Volume [PV]
(gallons) 2,512,831 I
I Table 3: Estimated Initial A_g_ueous-Phase Contaminant Concentration Initial Aqueous-Phase Contaminant Concentration Concentration Basis (ug/L)
Incremental Averaging of Concentrations within Remediation Area 26.34 Maximum Representative Concentration within Remediation Area 81.92 Remarks Average uranium concentration Representative uranium concentration for WELL 1381
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~~.........
I /.--~~--
WU-UP2 - Uranium
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Table 4: Estimated Number of Pore Volumes to Achieve Remediation Goal (30 ug/L)
Uranium Cleanup Initial Aqueous-Phase Concentration Contaminant Concentration No. of Pore Volumes 6
R (ug/L)4 (ug/L)5
[#PV = -R ln(Cleanup/lnitial)]
Remarks Pore volumes required to achieve cleanup goal (MCL) and 55.30 30 82 55.6 discontinue remediation Table 5: Estimated Time to Achieve Remediation Goal {1_0 ug/L)
No. of Pore Volumes 55.6 Definitions:
ml -milliliters g-gram ft 3
- cubic feet Kd - distribution coefficient ug - microgram L - liter gpm - gallons per minute gpd - gallons per day Pore Volume (gallons) 2,512,831 DCGL - derived cleanup goal level MCL - maximum contaminant level Flow Rate Flow Rate Duration Estimate (gpm)7 (gpd)
Duration Estimate (days)
(months)
Remarks Time to achieve cleanup goal (MCL) and 56 80,640 1,731 57.0 discontinue remediation.
Notes:
1Assumes 30% transmissve porosity for alluvial sand, as presented in the Technical Memorandum (TM002), September 10, 2018, page 3.
2Kd derived from previous studies as mentioned in the Technical Memorandum (TM002), September 10, 2018, page 4.
3Saturated zone thickness assumed to be 8 feet, as presented in the Technical Memorandum (TM002), September 10, 2018, page 5.
4Remediation will be discontinued when the uranium groundwater concentration reaches the MCL (30 ug/L).
5The larger of t he 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 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 located within the remediation area (see Iner. AWCA Calcs_Rev. C {09 18}.xlsx ). Init ial aqueous-phase contaminant concentrations will be variable.
6Number of pore volumes assumes linear, reversible and instantaneous sorption, and may result in an underestimation of cleanup timeframe estimates.
7Flow rate is based on the nominal combined groundwater injection rate for extraction trenches GWI-UPl-02 through GWI-UPl-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 wi ll be updated using system performance and groundwater monitoring data collected during the early stages of remedial operations.
Remediation and Water Treatment Duration Estimate Calculations WAA-WEST (Alluvium/Transition Zone/SSB)
(GE-WAA-05)
Table 1: Retardation Calculation Bulk Density (g/ml)
Porosity [n) 1 1.81 0.3 Table 2: Remediation Pore Volume Calculation Area of Plume [A]
(ft2)
Porosity [n) 1 397,843 0.3 Uranium Kd (ml/g)2 0.6 Average Plume Thickness [b]
3 (ft) 20 Pore Volume (ft3)
[PV = b*n*A]
2,387,058 R = l + P1c;, Kd n
Retardation [RI 4.62 Pore Volume [PV]
(gallons) 17,855,194 Table 3: Estimated Initial Aqueous-Phase Contaminant Concentration Initial Aqueous-Phase Contaminant Concentration Concentration Basis (ug/L)
Remarks Incremental Averaging of Concentrations within Remediation Area Average nitrate concentration Maximum Representative Concentration within Remediation Area 10.22 Representative nitrate concentration for WELL T-97 Table 4: Estimated Number of Pore Volumes to Achieve Remediation Goal (22.9 ug/L)
Nitrate Cleanup Initial Aqueous-Phase Concentration Contaminant Concentration No. of Pore Volumes 6
R (ug/L)4 (ug/L)5
[#PV = -R ln(Cleanup/lnitial)]
Remarks Pore volumes required to achieve cleanup goal (ACL) and 4.62 22.9 10.2 0.0 discontinue remediation Table 5: Estimated Time to Achieve Remediation Goal (22.9 ug/L)
No. of Pore Volumes
0.0 Definitions
ml - milliliters g - gram ft3 - cubic feet Kd - distribution coefficient ug - microgram L - liter gpm - gallons per minute gpd - gallons per day Pore Volume (gallons) 17,855,194 DCGL - derived cleanup goal level ACL - alternative contaminant level Flow Rate Flow Rate Duration Estimate (gpm)7 (gpd)
Duration Estimate (days)
(months)
Remarks Time to achieve cleanup goal (ACL) and 10 14,400 0.0 0.0 discontinue remediation.
Notes:
1Assumes 30% transmissve porosity for alluvial sand, as presented in the Technical Memorandum (TM002), September 10, 2018, page 3.
2Kd derived from previous studies as mentioned in the Technical Memorandum (TM002), September 10, 2018, page 4.
3Saturated zone thickness assumed to be 20 feet, as presented in the Technical Memorandum (TM002), September 10, 2018, page 5.
4Remediation will be discontinued when the nitrate groundwater concentration reaches the ACL (22.9 mg/L).
5The larger of the following is assumed as initial nitrate 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 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 located within the remediation area (see Iner. AWCA Ca/cs_ Rev. C (09-05-18).xlsx ). Initial aqueous-phase contaminant concentrations will be variable.
6Number of pore volumes assumes linear, reversible and instantaneous sorption, and may result in an underestimation of cleanup timeframe estimates.
7Flow rate is based on the nominal groundwater recovery rate for extraction well GE-BAl-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.
Remediation and Water Treatment Duration Estimate Calculations WAA-WEST (Alluvium/Transition Zone/SSB)
(GE-WAA-05)
Uranium Table 1: Retardation Calculation Bulk Density Uranium Kd (g/ml)
Porosity [n]1 (ml/g)2 1.81 0.3 2
Table 2: Remediation Pore Volume Calculation Average Plume Area of Plume [A]
Thickness [b]
3 (ft2)
Porosity [n]1 (ft) 397,843 0.3 20 R = l + !!..£1(.
n a
Retardation [Rl 13.07 Pore Volume (ft3)
Pore Volume [PV)
[PV = b*n*A]
(gallons) 2,387,058 17,855,194 I
/
I 15
/
Table 3: Estimated Initial A_g_ueous-Phase Contaminant Concentration
/
Initial Aqueous-Phase Contaminant Concentration Concentration Basis (ug/L)
Remarks Incremental Averaging of Concentrations within Remediation Area 45.95 Average uranium concentration Maximum Representative Concentration within Remediation Area 64.07 Representative uranium concentration for WELL T-97
/ (
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~\\~<'-<:__-
-WEST-Uranium
,) l ' - -WAA
...... '............. ___ *~-,;:_ __
Table 4: Estimated Number of Pore Volumes to Achieve Remediation Goal (30 u_g[_L)
Uranium Cleanup Initial Aqueous-Phase Concentration Contaminant Concentration No. of Pore Volumes6 R
(ug/L) 4 (ug/L)5
[#PV = -R ln(Cleanup/lnitlal)]
Remarks Pore volumes required to achieve cleanup goal (MCL) and 13.07 30 64 9.9 discontinue remediation Table 5: Estimated Time to Achieve Remediation Goal (30 u_g_/L)
No. of Pore Volumes
9.9 Definitions
ml-milliliters g-gram ft 3
- cubic feet Kd - distribution coefficient ug - microgram L-liter gpm - gallons per minute gpd - gallons per day Pore Volume (gallons) 17,855,194 DCGL - derived cleanup goal level MCL - maximum contaminant level Flow Rate Flow Rate Duration Estimate (gpm)1 (gpd)
Duration Estimate (days)
(months)
Remarks Time to achieve cleanup goal (MCL) and 10 14,400 12,294 404.2 discontinue remediation.
Notes:
1Assumes 30% transmissve porosity for alluvial sand, as presented in the Technical Memorandum (TM002), September 10, 2018, page 3.
2Kd derived from previous studies as mentioned in the Technical Memorandum (TM002), September 10, 2018, page 4.
3Saturated zone thickness assumed to be 20 feet, as presented in the Technical Memorandum (TM002), September 10, 2018, page 5.
4Remediation will be discontinued when the uranium groundwater concentration reaches the MCL (30 ug/L).
5The larger of the following is assumed as initial uranium concentration for estimating the groundwater remediation durat ion: (1) the maximum representative concentration reported for any well within 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 concentrations within the specified treatment area.
The incremental averaging is performed using isopleth contours developed using representative groundwater concentrat ions for monitor wells located within the remediation area (see Iner. AWCA Calcs_Rev. C {09-05-18).xlsx ).
Initial aqueous-phase contaminant concentrations will be variable.
6Number of pore volumes assumes linear, reversible and instantaneous sorption, and may result in an underestimation of cleanup timeframe estimates.
7Flow rate is based on the nominal groundwater recovery rate for extraction well GE-BAl-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.
Remediation and Water Treatment Duration Estimate Calculations
)
WAA-EAST (~lluvium/Transition Zone/SSB)
GE-WAA-14 & GE-WAA-15 Table 1: Retardation Calculation Bulk Density (g/ml) 1.81 Porosity_[nj1 0.3 Table 2: Remediation Pore Volume Calculation Area of Plume [A)
(ft' )
Porosity [n]1 827,431 0.3 Nitrate K,i (ml/g)'
0.6 Average Plume Thickness [b]3 (ft) 19 R =
l + ~
f(,
n Retardation lfil 4.62
- ~---\\
Pore Volume (ft3)
Pore Volume [PV)
[PV = b*n*A]
(gallons) 4,716,357 35,278,348 7
\\.,,-~>-
~
Table 3: Estimated Initial A_g_ueous-Phase Contaminant Concentration
~
1
- v 14 _.* r7
/
- -\\ "
1
= -"-.i Cis.:,f> /
/
/
,V ~~\\
) / ----~ij Initial Aqueous-Phase Contaminant Concentration Concentration Basis (mg/l)
Incremental Averaging of Concentrations within Remediation Area 55.44 Maximum Representative Concentration within Remediation Area 112.40 L
Remarks Average nitrate concentration Representative nitrate concentration for WELL T-59 0
I i c-~(C_
Table 4: Estimated Number of Pore Volumes to Achieve Remediation Goal (22.9 mg/L)
~
~ -------
/
- ~
Initial Aqueous-Phase Nitrate Cleanup Contaminant Concentration Concentration No. of Pore Volumes6 R
(mg/l)4 (mg/L)'
[#PV = -R ln(Cleanup/lnitial))
Remarks Pore volumes required to achieve cleanup goal and J
j
- te
_______ /
WAA-EAST - N1tra 4.62 22.9 112 7.4 discontinue remediat ion Table 5: Estimated Time to Achieve Remediation Goal (22.9 ug/L)
No. of Pore Volumes
7.4 Definitions
ml -milliliters g-gram ft 3
- cubic feet K,i - distribution coefficient ug - microgram L-liter gpm - gallons per minute gpd - gallons per day Pore Volume (gallons) 35,278,348 DCGL - derived cleanup goal level ACL - alternative contaminant level Flow Rate Flow Rate Duration Estimate (gpm)'
(gpd)
Duration Estimate (days)
(months)
Remarks Time to achieve cleanup goal and 20 28,800 9,003 296.1 discontinue remediation.
Notes:
' Assumes 30% transmissve porosity for alluvial sand, as presented in the Technical Memorandum (TM002), September 10, 2018, page 3.
21<,, derived from previous studies as mentioned in the Technica l Memorandum (TM002), September 10, 2018, page 4.
' saturated zone thickness assumed to be 19 feet, as presented in the Technical Memorandum (TM002), September 10, 2018, page 5.
4Remediation will be discontinued when the nitrate groundwater concentration reaches the ACL (22.9 mg/L).
5The larger of the following is assumed as initial nitrate 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 2011 through Q2 2017), (2) the concentration estimated by conducting incremental averaging of concent rations 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_Rev. C (09-05-18}.xlsx ). Initial aqueous-phase contaminant concentrations will be variable.
' Number of pore volumes assumes linear, reversible and instantaneous sorption, and may result in an underestimation of cleanup timeframe estimates.
7Flow rate is based on the nominal combined groundwater recovery rate for extraction wells GE-WAA-14 and GE-WAA-15.
- 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 WAA-EAST (Alluvium/Transition Zone/SSB)
GE-WAA-14 & GE-WAA-15 Uranium Table 1: Retardation Calculation Bulk Density (g/ml) 1.81 Porosity [n]1 0.3 Table 2: Remediation Pore Volume Calculation Area of Plume [A]
(ft2)
Porosity [n]1 827,431 0.3 I
I Uranium Kd (ml/g)2 Average Plume Thickness [b]3 (ft) 19 R =l +~ IC n
a
/
I I
Retardation [RI 15 I
I 13.07 Pore Volume (ft3)
Pore Volume [PV)
[PV = b*n*A)
(gallons) 4,716,357 35,278,348 Table 3: Estimated Initial Aqueous-Phase Contaminant Concentration II/
Initial Aqueous-Phase Contaminant Concentration Concentration Basis (ug/L)
Incremental Averaging of Concentrations within Remediation Area 39.88 Maximum Representative Concentration within Remediation Area 92.26 Remarks Average uranium concentration Representative uranium concentration for WELL T-59 I / ~\\ ( -"-)
,.\\' '
\\ ',., *,.. :*--.....
-..,_<*,::-:: ~-==* :.. :~-
WAA-EAST-Uranium
- -~
~---~
Table 4: Estimated Number of Pore Volumes to Achieve Remediation Goal (30 ug/L)
Uranium Cleanup Initial Aqueous-Phase Concentration Contaminant Concentration No. of Pore Volumes6 R
(ug/L) 4 (ug/L)5
[#PV = -R ln(Cleanup/lnitial))
Remarks Pore volumes required to achieve cleanup goal (MCL) and 13.07 30 92 14.7 discontinue remediation Table 5: Estimated Time to Achieve Remediation Goal (30 u~L)
No. of Pore Volumes 14.7 Definitions:
ml-milliliters g-gram ft 3
- cubic feet Kd - distribution coefficient ug - microgram L-liter gpm - gallons per minute gpd - gallons per day Pore Volume (gallons) 35,278,348 DCGL - derived cleanup goal level MCL - maximum contaminant level Flow Rate Flow Rate Duration Estimate (gpm),
(gpd)
Duration Estimate (days)
(months)
Remarks Time to achieve cleanup goal (MCL) and 20 28,800 17,981 591.2 discontinue remediation.
Notes:
1Assumes 30% transmissve porosity for alluvial sand, as presented in the Technical Memorandum (TM002), September 10, 2018, page 3.
2Kd derived from previous studies as mentioned in the Technical Memorandum (TM002), September 10, 2018, page 4.
3Saturated zone thickness assumed to be 19 feet, as presented in the Technical Memorandum (TM002), September 10, 2018, page 5.
4Remediation will be discontinued when the uranium groundwater concentration reaches the MCL (30 ug/L).
sThe larger of the following is assumed as initial uranium concentration for estimating the groundwater remediation durat ion: (1) the maximum representative concentration reported for any well within 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 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_Rev. C (09 18).xlsx ). Initial aqueous-phase contaminant concentrations will be variable.
6Number of pore volumes assumes linear, reversible and instantaneous sorption, and may result in an underest imation of cleanup timeframe estimates.
7Flow rate is based on the nominal combined groundwater recovery rate for extraction wells GE-WAA-14 and GE-WAA-15.
- 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. Est imates 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 WU-PBA (SSB)
Table 1: Retardation Calculation Bulk Density Nitrate Kd (g/ml)
Porosity [n]1 (ml/g)2 1.81 0.05 0.6 Table 2: Remediation Pore Volume Calculation Average Plume Area of Plume [A)
Thickness [b] 3 (ft2)
Porosity [n]1 (ft) 243,436 0.05 19 Pore Volume (ft3)
[PV= b*n"A) 231,264 R = l+&gd n
Retardation [Rl 22.72 Pore Volume [PV]
(gallons) 1,729,856
' '"'°
.* ~ ~
,._ G ETR-Wt.J-0 1A Table 3: Estimated Init ial A_g_ueous-Phase Contaminant Concentration Initial Aqueous-Phase Contaminant Concentration Concentration Basis (mg/L)
Remarks Incrementa l Averaging of Concentrations within Remediation Area 15.55 Average nitrate concentration Maximum Representative Concentration within Remediation Area 75.79 Representative nitrate concentration for WELL 1319B-3 r~
WU-PBA-Nitrate Table 4: Estimated Number of Pore Volumes to Achieve Remediation Goal (22.9 m_g_/L)
Initial Aqueous-Phase Nitrate Cleanup Contaminant Concentration Concentration No. of Pore Volumes 6
R (mg/L)4 (mg/L) 5
[#PV = -R ln(Cleanup/lnitial))
Remarks Pore volumes required to achieve cleanup goal and 22.72 52 76 8.6 discontinue remediation Table 5: Estimated Time to Achieve Remediation Goal (22.9 ug/L)
No. of Pore Volumes
8.6 Definitions
ml - milliliters g-gram ft 3
- cubic feet Kd - distribution coefficient ug - microgram L-liter gpm - gallons per minute gpd - gallons per day Pore Volume (gallons) 1,729,856 DCGL - derived cleanup goal level ACL - alternative contaminant level Flow Rate Flow Rate Duration Estimate (gpm)1 (gpd)
Duration Estimate (days)
(months)
Remarks Time to achieve cleanup goal and 5
7,200 2,056 67.7 discontinue remediation.
Notes:
1Assumes 30% transmissve porosity for alluvia l sand, as presented in the Technica l Memorandum (TM002), September 10, 2018, page 3.
2Kd derived from previous studies as mentioned in the Technical Memorandum (TM002), September 10, 2018, page 4.
3Saturated zone thickness assumed to be 19 feet, as presented in the Technical Memorandum (TM002), September 10, 2018, page 5.
4The nitrate remediation goal for the Sand stone B formation in the PBA is the ACL (52 mg/L).
5The larger of the following is assumed as initial nitrate concentration for estimating the groundwater remediation duration: (1) the maximum representative concentration reported for any well within the remediation area (determined using sampling resu lts 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 isopleth contours developed using representative groundwater concentrations for monitor wells located within the remediation area (see Iner. AWCA Calcs_Rev. C {09-05-18).x/sx ). Initial aqueous-phase contaminant concentrations will be varia ble.
6Number of pore volumes assumes linear, reversible and instantaneous sorption, and may result in an underestimation of cleanup timefra me estimates.
7Flow rate is based on the nominal groundwater recovery rate for extraction well GE-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.
Remediation and Water Treatment Duration Estimate Calculations WU-PBA (SSB)
Uranium Table 1: Retardation Calculation Bulk Density fg/ml 1.81 Table 2: Remediation Pore Volume Calculation Area of Plume [A)
(ft2)
Porosity [n)1 243,436 0_05 Uranium Kd (mlk' 2 Average Plume Thickness [b]3 (ft) 19
~
-:~~---------
R = l + f!..?. K,
n Retardation IBl 109_60 Pore Volume (ft3)
Pore Volume [PV) 0
[PV = b*n*A]
(gallons) 231,264 1,729,856 Table 3: Estimated Initial A_g_ueous-Phase Contaminant Concentration Initial Aqueous-Phase Contaminant Concentration Concentration Basis (ug/L)
Remarks Incremental Averaging of Concentrations within Remediation Area 34_69 Average uranium concentration Maximum Representative Concentration within
~
WU-PBA - Uranium Remediation Area 38.01 Representative uranium concentration for WELL 13198-1 Table 4: Estimated Number of Pore Volumes to Achieve Remediation Goal (30 ~L)
R 109.60 No. of Pore Volumes 25.9 Definitions:
ml-milliliters g-gram ft 3
- cubic feet Kd - distribution coefficient ug - microgram L-liter gpm - gallons per minute gpd - gallons per day Uranium Cleanup Concentration (ug/L) 4 30 Pore Volume (gallons) 1,729,856 DCGL - derived cleanup goal level MCL - maximum contaminant level Initial Aqueous-Phase Contaminant Concentration No. of Pore Volumes6 (ug/L) 5
[#PV = -R ln(Cleanup/lnitial))
Remarks Pore volumes required to achieve cleanup goal (MCL) and 38 25.9 discontinue remediation Flow Rate Flow Rate Duration Estimate (gpm),
(gpd)
Duration Estimate (davs)
(months)
Remarks Time to achieve cleanup goal (MCL) and 5
7,200 6,232 204.9 discontinue remediation.
Notes:
1Assumes 30% transmissve porosity for alluvial sand, as presented in the Technical Memorandum (TM002), September 10, 2018, page 3.
2Kd derived from previous studies as mentioned in the Technical Memorandum (TM002), September 10, 2018, page 4.
3Saturated zone thickness assumed to be 19 feet, as presented in the Technical Memorandum (TM002), September 10, 2018, page 5.
4Remediation will be discontinued when the uranium groundwater concentration reaches the MCL (30 ug/L).
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 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 located within the remediation area (see Iner. AWCA Calcs_Rev. C (09-05-18}.xlsx ). Initial aqueous-phase contaminant concentrations will be variable.
6Number of pore volumes assumes linear, reversible and instantaneous sorption, and may result in an underestimation of cleanup timeframe estimates.
7Flow rate is based on the nominal groundwater recovery rate for extraction well GE-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.
Remediation and Water Treatment Duration Estimate Calculations 1206-NORTH (Alluvium/Transition Zone/SSB)
Table 1: Retardation Calculation Bulk Density (g/ml) 1.81 Porosity.l!!J.1 0.11 Table 2: Remediation Pore Volume Calculation Bulk Saturated Plume Volume [V]
3 (tt3)
Porosity [n]1 27,396 0.11 Nitrate Kd
~lfg'2 0.6 Pore Volume (tt3)
[PV = V*n]
3,014 Pore Volume [PV]
(gallons) 22,541 R = l + f!.E K c.
n Retardation IBl 10.87 Table 3: Estimated Initial Agueous-Phase Contaminant Concentration Initial Aqueous-Phase Contaminant Concentration Concentration Basis (mg/L)
Remarks Incremental Averaging of Concentrations within Remediation Area 42.20 Average nitrate concentration Maximum Representative Concentration within Remediation Area 43.05 Representative nitrate concentration for WELL MWWA-09 Table 4: Estimated Number of Pore Volumes to Achieve Remediation Goal (22.9 mwL)
R 10.87 No. of Pore Volumes
6.9 Definitions
ml - milliliters g-gram ft3 - cubic feet Kd - distribution coefficient ug - microgram L-liter gpm - gallons per minute gpd - gallons per day Nitrate Cleanup Concentration (mg/L) 4 22.9 Pore Volume (gallons) 22,541 DCGL - derived cleanup goal level ACL - alternative contaminant level Initial Aqueous-Phase Contaminant Concentration No. of Pore Volumes6 (mg/L)s
[#PV = -R ln(Cleanup/lnitial)]
Remarks Pore volumes required to achieve cleanup goal and discontinue 43 6.9 remediation Flow Rate Flow Rate Duration Estimate (gpm)1 (gpd)
Duration Estimate (days)
(months)
Remarks Time to achieve cleanup goal and 8
11,520 13 0.5 discontinue remediation.
Notes:
1Assumes 11% transmissve porosity for BAl transition zone, as presented in Environmental Sequence Stratigraphy {ESS} and Porosity Analysis, Burial Area 1, dated April 6, 2018.
2Kd derived from previous studies as mentioned in the Technical Memorandum (TM002), September 10, 2018, page 4.
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-BA-01 and GETR-BAl-02, located within area of uranium groundwater contamination exceeding 30 ug/L.
4Remediation will be discontinued when the nitrate groundwater concentration reaches the ACL (22.9 mg/L).
5The larger of the following is assumed as initial nitrate 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 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 located within the remediation area (see Iner. AWCA Calcs_Rev. C (09-05-18).xlsx ). Initial aqueous-phase contaminant concentrations will be variable.
6Number of pore volumes assumes linear, reversible and instantaneous sorption, and may result in an underestimation of cleanup timeframe estimates.
7Flow rate is based on the nominal groundwater recovery rate for extraction trench GETR-WU-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.
Remediation and Water Treatment Duration Estimate Calculations 1206-NORTH (Alluvium/Transition Zone/SSB)
Uranium Table 1: Retardation Calculation Bulk Density (s/ml) 1.81 Porosity [n]1 0.11 Table 2: Remediation Pore Volume Calculation Bulk Saturated Plume Volume [V]3 (ft3)
Porosity [n]1 27,396 0.11 Uranium Kd (mlfg)2 Pore Volume (ft3)
[PV=V*n]
3,014 Pore Volume [PV]
(gallons) 22,541 R = t +~Ka n
Retardation IBJ.
50.36
,. --------*~--*...
~...
Table 3: Estimated Initial Aqueous-Phase Contaminant Concentration Initial Aqueous-Phase Contaminant Concentration Concentration Basis (ug/L)
Remarks Incremental Averaging of Concentrations within Remediation Area 248.49 Average uranium concentration Maximum Representative Concentration within Remediation Area 526.60 Representative uranium concentration for WELL MWWA-03 1206 North - Uranium Table 4a: Estimated Number of Pore Volumes to Achieve Remediation Goal (119 ug/L)
Uranium Cleanup Initial Aqueous-Phase
~
Concentration Contaminant Concentration No. of Pore Volumes6 E
R (ug/L)4 (ug/L)5
[#PV = -R ln(Cleanup/lnitial)J Remarks
~
Pore volumes required to achieve cleanup goal (DCGL) and C
0 50.36 119 527 74.9 discontinue remediation
~
0 Table Sb: Estimated Time to Achieve Remediation Goal (119 ug/L)
~
u Pore Volume Flow Rate Flow Rate Duration Estimate 0
No. of Pore Volumes (gallons)
(gpm)1 (gpd)
Duration Estimate (days)
(months)
Remarks Time to achieve cleanup goal (DCGL) and 74.9 22,541 8
11,520 147 4.9 discontinue remediation.
Table 4b: Estimated Number of Pore Volumes to Achieve Remediation Goal (30 ug/L)
Uranium Cleanup Initial Aqueous-Phase
~
Concentration Contaminant Concentration No. of Pore Volumes6 E
R (ug/L)
(ug/L) 5
[#PV = -R ln(Cleanup/lnitial)]
Remarks
~
50.36 30 527 144.3 Pore volumes required to achieve cleanup goal (MCL) and C
0
~
Table Sb: Estimated Time to Achieve Remediation Goal (30 ug/L) 0
....J u
~
No. of Pore Volumes Definitions:
ml-milliliters g-gram ft 3
- cubic feet Kd - distribution coefficient ug - microgram pCi/L - picocuries per liter L-liter gpm - gallons per minute gpd - gallons per day DCGL - derived cleanup goal level MCL - maximum contaminant level 144.3 Pore Volume Flow Rate Flow Rate Duration Estimate (gallons)
(gpm)7 (gpd)
Duration Estimate (days)
(months)
Remarks Time to achieve cleanup goal (MCL) and 22,541 8
11,520 282 9.3 discontinue remediation.
Notes:
1Assumes 11% transmissve porosity for BA1 transition zone, as presented in Environmental Sequence Stratigraphy (ESS) and Porosity Analysis, Burial Area 1, dated April 6, 2018.
2Kd derived from previous studies as mentioned in the Technical Memorandum (TM002), September 10, 2018, page 4.
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-BA-01 and GETR-BAl-02, located within area of uranium groundwater contamination exceeding 30 ug/L.
4Remediation will be discontinued when the uranium groundwater concentration reaches 119 ug/L, the equivalent of 180 pCi/L as calcuated in Uranium Activity vs. Mass Concentrotion_Rev. A (07-30-18).xlsx, and 30 ug/L.
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 remed iation 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 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_Rev. C (09 18).xlsx ). Initial aqueous-phase contaminant concentrations will be variable.
6Number of pore volumes assumes linear, reversible and instantaneous sorption, and may result in an underestimation of cleanup timeframe estimates.
7Flow rate is based on the nominal groundwater recovery rate for extraction trench GETR-WU-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.
Remediation and Water Treatment Duration Estimate Calculations WU-1348 (SSA)
Table 1: Retardation Calculation Bulk Density (g/ml)
Porosity [n] 1 1.81 0.1 Table 2: Remediation Pore Volume Calculation Area of Plume [A]
(ft2)
Porosity [n] 1 44,143 0.1 Nitrate Kd (ml/g)2 0.6 Average Plume Thickness [b] 3 (ft) 14 Pore Volume (ft3)
[PV = b*n*A]
61,800 R = 1+ p °Ka
- n Retardation [R]
11.86 Pore Volume [PV]
(gallons) 462,265 Table 3: Estimated Initial Aqueous-Phase Contaminant Concentration Initial Aqueous-Phase Contaminant Concentration Concentration Basis (ug/L)
Remarks Incremental Averaging of Concentrations within Remediation Area Average nitrate concentration Maximum Representative Concentration within Remediation Area 11.57 Representative nitrate concentration for WELL 1348 Table 4: Estimated Number of Pore Volumes to Achieve Remediation Goal (22.9 ug/L)
Initial Aqueous-Phase Nitrate Cleanup Contaminant Concentration Concentration No. of Pore Volumes 6
R (ug/L)4 (ug/L) 5
[#PV = -R ln(Cleanup/lnitial)]
Remarks Pore volumes required to achieve cleanup goal (ACL) and 11.86 30 12 0.0 discontinue remediation Table 5: Estimated Time to Achieve Remediation Goal (22.9 u_g_/L)
No. of Pore Volumes
0.0 Definitions
ml - milliliters g-gram ft 3
- cubic feet Kd - distribution coefficient ug - microgram L - liter gpm - gallons per minute gpd - gallons per day Pore Volume (gallons) 462,265 DCGL - derived cleanup goal level ACL - alternative contaminant level Flow Rate Flow Rate Duration Estimate (gpm)7 (gpd)
Duration Estimate (days)
(months)
Remarks Time to achieve cleanup goal (ACL) and 4
5,760 0
0.0 discontinue remediation.
Notes:
1Assumes 30% transmissve porosity for alluvial sand, as presented in the Technical Memorandum (TM002), September 10, 2018, page 3.
2Kd derived from previous studies as mentioned in the Technical Memorandum (TM002), September 10, 2018, page 4.
3Saturated zone thickness assumed to be 14 feet, as presented in the Technical Memorandum (TM002), September 10, 2018, page 5.
4Remediation will be discontinued when the nitrate groundwater concentration reaches the ACL (22.9 mg/L).
5The larger of the following is assumed as initial nitrate 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 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 located within the remediation area (see Iner. AWCA Calcs_Rev. C {09-05-18}.xlsx ). Initial aqueous-phase contaminant concentrations will be variable.
6Number of pore volumes assumes linear, reversible and instantaneous sorption, and may result in an underestimation of cleanup timeframe estimates.
7Flow 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.
Remediation and Water Treatment Duration Estimate Calculations WU-1348 (SSA)
WI~
Uranium Table 1: Retardation Calculation Bulk Density Uranium Kd (g/ml)
Porosity [n]1 (ml/g) 2 1.81 0.1 3
Table 2: Remediation Pore Volume Calculation Average Plume Area of Plume [A]
Thickness [b]3 (ft2)
Porosity [n]1 (ft) 44,143 0.1 14 Pore Volume (ft3)
[PV = b*n*A]
61,800 Pb R = 1 + -
Ka n.
Retardation [R]
55.30
~
Pore Volume [PV]
(gallons) 462,265
~
//
'/
~
/
l/
. -----.(
//
/
\\
- t,
\\ \\,
\\"
\\"'
Table 3: Estimated Initial Aqueous-Phase Contaminant Concentration
~~
\\
Initial Aqueous-Phase Contaminant Concentration Concentration Basis (ug/L)
Remarks
~----
Incremental Averaging of Concentrations within Remediation Area 56.79 Average uranium concentration Maximum Represent ative Concentration within Remediation Area 71.26 Representative uranium concentration for WELL 1348 WU-1348-Uranium Table 4: Estimated Number of Pore Volumes to Achieve Remediation Goal (30 ug/L)
Initial Aqueous-Phase Uranium Cleanup Contaminant Concentration Concentration No. of Pore Volumes 6
R (ug/L) 4 (ug/L) 5
[#PV = -R ln(Cleanup/lnitial)]
Remarks Pore volumes required to achieve cleanup goal (MCL) and 55.30 30 71 47.8 discontinue remediation Table 5: Estimated Time to Achieve Remediation Goal (30 ug_/L)
No. of Pore Volumes 47.8 Definitions:
ml - milliliters g - gram ft3 - cubic feet Kd - distribution coefficient ug - microgram L - liter gpm - gallons per minute gpd - gallons per day Pore Volume (gallons) 462,265 DCGL - derived cleanup goal level MCL - maximum contaminant level
-- ~
Flow Rate Flow Rate Duration Estimate (gpm)7 (gpd)
Duration Estimate (days)
(months)
Remarks Time to achieve cleanup goal (MCL) and 4
5,760 3,840 126.3 discontinue remediation.
Notes:
1Assumes 30% transmissve porosity for alluvial sand, as presented in the Technical Memorandum (TM002), September 10, 2018, page 3.
2Kd derived from previous studies as mentioned in the Technical Memorandum (TM002), September 10, 2018, page 4.
3Saturated zone thickness assumed to be 14 feet, as presented in the Technical Memorandum (TM002), September 10, 2018, page 5.
4Remediation will be discontinued when the uranium groundwater concentration reaches the MCL (30 ug/L).
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 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 located within the remediation area (see Iner. AWCA Calcs_Rev. C {09-05-18).xlsx ).
Initial aqueous-phase contaminant concentrations will be variable.
6Number of pore volumes assumes linear, reversible and instantaneous sorption, and may result in an underestimation of cleanup timeframe estimates.
7Flow 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.
Remediation and Water Treatment Duration Estimate Calculations WU-BA3 (SSA)
Table 1: Retardation Calculation R = 1 +.Pb'f<.
J'l.
G Bulk Density Nitrate Kd (g/ml)
Porosity [n]1 (ml/g)2 Retardation [R]
1.81 0.1 0.6 11.86 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 (mg/L)
Remarks Incremental Averaging of Concentrat ions within Remediation Area 54.02 Average nitrate concentration Maximum Representative Concentration within Remediation Area 76.09 Representative nitrate concentration for WELL 1351 WU-BA3 - Nitrate Table 4: Estimated Number of Pore Volumes to Achieve Remediation Goal (22.9 mg/L)
Initial Aqueous-Phase Nitrate Cleanup Contaminant Concentration Concentration No. of Pore Volumes6 R
(mg/L) 4 (mg/L)s
[#PV = -R ln(Cleanup/lnitial)]
Remarks Pore volumes required to achieve cleanup goal and 11.86 22.9 76 14.2 discontinue remediation Table 5: Estimated Time to Achieve Remediation Goal (22.9 u_g_/L)
No. of Pore Volumes 14.2 Definitions:
ml - milliliters g-gram ft 3
- cubic feet Kd - distribution coefficient ug - microgram L-liter gpm - gallons per minute gpd - gallons per day Pore Volume (gallons) 154,799 DCGL - derived cleanup goal level ACL - alternative contaminant level Flow Rate Flow Rate Duration Estimate (gpm)7 (gpd)
Duration Estimate (days)
(months)
Remarks Time to achieve cleanup goal and 8
11,520 191 6.3
0.5 Notes
discontinue remediation.
1Assumes 30% transmissve porosity for alluvial sand, as presented in the Technical Memorandum (TM002), September 10, 2018, page 3.
2Kd derived from previous studies as mentioned in the Technical Memorandum (TM002), September 10, 2018, page 4.
3Saturated zone thickness assumed to be 5 feet, as presented in the Technical Memorandum (TM002), September 10, 2018, page 5.
4Remediation will be discontinued when the nitrate groundwater concentration reaches the ACL (22.9 mg/L).
5The larger of the following is assumed as initial nitrate 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 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 located within the remediation area (see Iner. AWCA Calcs_Rev. C {09-05-18).xlsx ). Initial aqueous-phase contaminant concentrations will be variable.
6Number of pore volumes assumes linear, reversible and instantaneous sorption, and may result in an underestimation of cleanup timeframe estimates.
7Flow rate is based on the nominal water injection rate for injection trench GWI-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.
Remediation and Water Treatment Duration Estimate Calculations
~ U-BA3 (SSA) r--
Uranium Table 1: Retardation Calculation Bulk Density (g/ml) 1.81 Porosity l!!J.1 0.1 Table 2: Remediation Pore Volume Calculation Area of Plume [A]
(ft2)
Porosity [n] 1 41,390 0.1 Uranium Kd (ml/g)2 Average Plume Thickness [b) 3 (ft) 5 R = l + t:..l?.K,
n Retardation IB1 55.30 Pore Volume (ft3)
Pore Volume [PV)
[PV = b*n*A]
(gallons) 20,695 154,799
.I /
~ --------
~, \\J(I
/
~
~
/ /
\\ "'
I / / "-,, _,--------- --
~ ------ -~
Table 3: Estimated Initial A_g_ueous-Phase Contaminant Concentration
\\
I
~
,-"'-*\\
( ( r ',--- -
\\ ~ ~>,l\\ (_ ~'~, \\\\, \\\\
Initial Aqueous-Phase Contaminant Concentration Concentration Basis (ug/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
's WU-BA3 - Uranium Table 4a: Estimated Number of Pore Volumes to Achieve Remediation Goal (119 ug/L)
Uranium Cleanup Initial Aqueous-Phase 2l Concentration Contaminant Concentration No. of Pore Volumes 6
E R
(ug/L)4 (ug/L) 5
[#PV = -R ln(Cleanup/lnitial)l Remarks
~
55.30 119 875 110.3 Pore volumes required to achieve cleanup goal (DCGL) and C
0
~
Table Sa: Estimated Time to Achieve Remediation Goal (119 ug/L)
C 8
Pore Volume Flow Rate Flow Rate Duration Estimate C
No. of Pore Volumes hzallons) htPml 7
(gpd)
Duration Estimate (days)
(months)
Remarks Time to achieve cleanup goal (DCGL) and discontinue 110.3 154,799 8
11,520 1,482 48.8 remediation.
Table 4b: Estimated Number of Pore Volumes to Achieve Remediation Goal (30 ug/L)
Uranium Cleanup Initial Aqueous-Phase 2l Concentration Contaminant Concentration No. of Pore Volumes6 e
R (ug/L)
(uR/Ll 5
[#PV = -R ln(Cleanup/lnitiall]
Remarks
~
55.30 30 875 186.5 Pore volumes required to achieve cleanup goal (MCL) and C I Table Sb: Estimated Time to Achieve Remediation Goal (30 ug/L)
C
....I u
~
No. of Pore Volumes Definitions:
ml-milliliters g-gram ft 3
- cubic feet Kd - distribution coefficient ug - microgram pCi/L - picocuries per liter L-liter gpm - gallons per minute gpd - gallons per day DCGL - derived cleanup goal level MCL - maximum contaminant level 186.5 Pore Volume Flow Rate Flow Rate Duration Estimate (gallons)
(e;pm)1 (e;pd)
Duration Estimate (days)
(months) 154,799 8
11,520 2,506 82.4
6.9 Notes
1Assumes 30% transmissve porosity for alluvial sand, as presented in the Technical Memorandum (TM002), September 10, 2018, page 3.
2Kd derived from previous studies as mentioned in the Technical Memorandum (TM002), September 10, 2018, page 4.
3Saturated zone thickness assumed to be 5 feet, as presented in the Technical Memorandum (TM002), September 10, 2018, page 5.
Remarks Time to achieve cleanup goal (MCL) and discontinue remediation.
4Remediation will be discontinued when the uranium groundwater concentration reaches 119 ug/L, the equivalent of 180 pCi/L as calcuated in Uranium Activity vs. Mass Concentration_Rev. A (07-30-18).xlsx, and 30 ug/L.
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 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 located within the remediation area (see Iner. AWCA Ca/cs_Rev. C (09 18}.xlsx ). Initial aqueous-phase contaminant concentrations will be variable.
6Number of pore volumes assumes linear, reversible and instantaneous sorption, and may result in an underestimation of cleanup timeframe estimates.
7Flow rate is based on the nominal water injection rate for injection trench GWI-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.
0.1 - Initial and Maximum Influent Contaminant Concentration Cales. for BA1 and WA
MAXIMUM INFLUENT CONTAMINANT CONCENTRATION CALCULATION
SUMMARY
Cimarron Environmental Response Trust Remediation Extraction Area Well/Trench WU "1206 NORTH" GETR-WU-02 WU-PBA GE-WU-01 WU "1206 SOUTH" GETR-WU-01 GE-WAA-01 GE-WAA-02 WAA "U>DCGL" GE-WAA-03 GE-WAA-04 WAA "U<DCGL" WEST GE-WAA-05 GE-WAA-06 GE-WAA-07 GE-WAA-08 GE-WAA-09 WAA "BLUFF" GE-WAA-10 GE-WAA-11 GE-WAA-12 GE-WAA-13 GE-WAA-14 WAA "U<DCGL" EAST AREA A AREAS AREAC Notes:
SSA - Sandstone A SSA - Sandstone B TZ - Transition Zone GE-WAA-15 Initial Iq*Cmax Initial Iq Initial Influent Concer GETR-BA 1-01 GETR-BA 1-02 GE-BA1-02 GE-BA1-03 GE-BA1-04 GE-BA1-05 GE-BA1-06 GE-BA1-07 GE-BA1-08 GE-BA1-09 Iq*cmax Lq MaxlnfluentConcen gpm - gallons per minute ug/L - micrograms per liter mg/L-milligrams per liter Influent Flow Rate (aom) q 8
5 4
25 30 24 20 10 13 13 13 13 13 14 13 12 10 10 250 7
7 24 18 24 0
0 0
10 10 100 Adjusted Flow Rate Nitrate Uranium
/aom)
(mQ/L)
(UQ/L) q*%
Cmax Western Area 38.6 304 61.7 29.0 10.14 62.0 25.3 134 29.0 163 67.1 163 21.4 119 10.2 58.6 90.8 64.0 204 15.6 73.2 10.9 204 15.6 141 7.70 204 15.6 218 4.77 378 26.3 207 6.40 378 26.3 128 6.80 378 26.3 24.5 5.48 378 26.3 22.1 8.15 378 26.3 79.1 61.9 65.4 40.4 0
Burial Area 1 1,360 2,080 2,420 430 389 168 88.6 43.3 32.1 37.2 Weighted Weighted Fluoride Nitrate Uranium (mg/L)
(mg/L)
(ug/L) q*Cmax 7.03 309.12 2428.36 0.32 308.65 145.10 1.00 40.57 247.90 1.40 632.75 3354.50 2.62 869.40 4903.20 3.41 1610.88 3908.40 1.44 427.40 2380.60 0.45 102.40 586.40 3.26 1180.79 832.39 18.8 2652.00 202.80 2.6 951.99 142.09 18.8 2652.00 202.80 3.54 1833.00 100.10 18.8 2652.00 202.80 2.46 2829.71 62.01 7.80 4914.00 341.90 2.03 2692.43 83.20 7.80 4914.00 341.90 1.76 1794.94 95.20 7.80 5292.00 368.20 0.92 318.24 71.24 7.80 4914.00 341.90 0.84 265.32 97.80 7.80 4536.00 315.60 0.46 791.00 619.00 0.43 653.50 403.60 17612 20461 250 250 70.4 81.8 9,520.00 14,560.00 58,080.00 7,740.00 9,336.00 0.00 0.00 0.00 321.00 372.00 99929.00 100 999 Page 1 of 1 Weighted Fluoride (mQ/L) 56.26 1.58 4.01 35.00 78.60 81.84 28.80 4.50 42.38 244.40 33.93 244.40 46.02 244.40 31.98 101.40 26.39 101.40 24.64 109.20 11.96 101.40 10.08 93.60 4.60 4.30 526.9 250 2.11 Comments:
Governing Assumptions:
05/25/2017 Rev.C
- Maximum uranium, nitrate, and fluoride influent concentrations will not occur at time zero for extraction wells GE-WAA-6 through -13; however maximum uranium, nitrate, and fluoride influent concentrations will occur at time zero for all other extraction wells and trenches.
- lntitia/ (time zero) uranium, nitrate, and fluoride influent nitrate concentrations for GE-WAA-6 through -13 are based on representative SSBITZ/Alluvium concentrations.
- Future (time 't') uranium, nitrate, and fluoride influent nitrate concentrations for GE-WAA-6 through -13 are based on representative, upgradient (UP1 &
UP2) SSA concentrations. 100% of this SSA groundwater contribution is assumed to be driven by the proposed injection features (i.e., natural groundwater flux from SSA is assumed to be negligible).
- Linear, incremental concentration averaging along trench alignment using isoconcentration contours [see Iner. AWCA Cales Rev. B (08-15-18)].
- Interpolated concentrations calculated in Surfer [see Iner. AWCA Calcs_Rev.
B (08-15-1811.
- Linear, incremental concentration averaging along trench alignment using isoconcentration contours [see Iner. AWCA Cales Rev. B (08-15-18)1.
- Interpolated concentrations calculated in Surfer (see Iner. AWCA Calcs_Rev.
B (08-15-18)].
- Interpolated concentrations calculated in Surfer [see Iner. AWCA Calcs_Rev.
B (08-15-1811.
- Interpolated concentrations calculated in Surfer (see Iner. AWCA Calcs_Rev.
B (08-15-18)].
- Interpolated concentrations calculated in Surfer (see Iner. AWCA Calcs_Rev.
B (08-15-18)].
- Interpolated concentrations calculated in Surfer [see Iner. AWCA Calcs_Rev.
B (08-15-1811.
- Initial Influent Concentration: [SSB/TZ/Alluvium] interpolated concentrations calculated in Surfer [see Iner. AWCA Calcs_Rev. B (08 18)1
- Maximum Influent Concentration: [SSA] UP1 area-weighted incremental concentration averaging using isoconcentration contours [see Iner. AWCA Cales Rev. C (08-22-18)1.
- Initial Influent Concentration: [SSB/TZ/Alluvium] interpolated concentrations calculated in Surfer [see Iner. AWCA Calcs_Rev. B (08 18)1.
- Maximum Influent Concentration: [SSA] UP1 area-weighted incremental concentration averaging using isoconcentration contours [see Iner. AWCA Cales Rev. C (08-22-18)1.
- Initial Influent Concentration: [SSB/TZ/Alluvium] interpolated concentrations calculated in Surfer [see Iner. AWCA Calcs_Rev. B (08 18)1.
- Maximum Influent Concentration: [SSA] UP1 area-weighted incremental concentration averaging using isoconcentration contours [see Iner. AWCA Cales Rev. C (08-22-18)1.
- Initial Influent Concentration: [SSB/TZ/Alluvium] interpolated concentrations calculated in Surfer [see Iner. AWCA Calcs_Rev. B (08 18)1.
- Maximum Influent Concentration: [SSA] UP2 area-weighted incremental concentration averaging using isoconcentration contours [see Iner. AWCA Cales Rev. C (08-22-18)].
- Initial Influent Concentration: [SSB/TZ/Alluvium] interpolated concentrations calculated in Surfer [see Iner. AWCA Calcs_Rev. B (08 18)].
- Maximum Influent Concentration: [SSA] UP2 area-weighted incremental concentration averaging using isoconcentration contours (see Iner. AWCA Cales Rev. C (08-22-18)1.
- Initial Influent Concentration: [SSB/TZ/Alluvium) interpolated concentrations calculated in Surfer [see Iner. AWCA Calcs_Rev. B (08 18)1.
- Maximum Influent Concentration: [SSA) UP2 area-weighted incremental concentration averaging using isoconcentration contours (see Iner. AWCA Cales Rev. C /08-22-1811.
- Initial Influent Concentration: [SSB/TZ/Alluvium) interpolated concentrations calculated in Surfer (see Iner. AWCA Calcs_Rev. B (08 18)1.
- Maximum Influent Concentration: [SSA] UP2 area-weighted incremental concentration averaging using isoconcentration contours [see Iner. AWCA Cales Rev. C /08-22-1811
- Initial Influent Concentration: [SSB/TZ/Alluvium) interpolated concentrations calculated in Surfer [see Iner. AWCA Calcs_Rev. B (08 18)1
- Maximum Influent Concentration: [SSA) UP2 area-weighted incremental concentration averaging using isoconcentration contours [see Iner. AWCA Cales Rev. C (08-22-18)1
- Interpolated concentrations calculated in Surfer (see Iner. AWCA Calcs_Rev.
B (08-15-18)1.
- Interpolated concentrations calculated in Surfer [see Iner. AWCA Calcs_Rev.
B /08-15-18)1.
Governing Assumptions:
- Maximum uranium influent concentrations for all extraction wells and trenches will occur at time zero.
- Linear, incremental concentration averaging along trench alignment using isoconcentration contours (see Iner. AWCA Cales Rev. A (07-31-18).
- Linear, incremental concentration averaging along trench alignment using isoconcentration contours (see Iner. AWCA Cales Rev. A (07-31-18)
- Interpolated concentrations calculated in Surfer [see Iner. AWCA Calcs_Rev.
B (08-15-18)1
- Interpolated concentrations calculated in Surfer [see Iner. AWCA Calcs_Rev.
B (08-15-18)]
- Interpolated concentrations calculated in Surfer [see Iner. AWCA Calcs_Rev.
B (08-15-1811
- Interpolated concentrations calculated in Surfer [see Iner. AWCA Calcs_Rev.
B (08-15-18)1
- Interpolated concentrations calculated in Surfer (see Iner. AWCA Calcs_Rev.
B (08-15-18)1.
- Interpolated concentrations calculated in Surfer (see Iner. AWCA Calcs_Rev.
B (08-15-18)1.
- Interpolated concentrations calculated in Surfer [see Iner. AWCA Calcs_Rev.
B (08-15-18)1
- Interpolated concentrations calculated in Surfer [see Iner. AWCA Calcs_Rev.
B (08-15-18)).
0.2a - BA 1 Influent Concentration Decline Analysis
10/23/18 Note: the estimates provided below are preliminary in nature and will require revision during 90% Water Treatment Design Basis development associated with the Groundwater Remediation Project being conducted for the Cimarron Environmental Response Trust.
2000.IJ moo o
- J' 1 200 0
~
c::
C*
+:l ;
- 100(1 (1 C
0
(.)
E
- 5 C:
ft1
- J
- 300.0 600.0 400.(1 200.0
- 0. 0
---+-I ~I~:--
I I
BA1 Uranium Concentration Trends Combined Influent M on th s fr om Treatment Start 1h'EIGHTED AVERAGE
Remediation Area BA1-A1 (GETR-BA1-01 & GETR-BA1-02)
BA1-B1 (GE-BA1-02 through GE-BA1-04)
BA1-B2 (GE-BA1-02 through GE-BA1-04)
BA1-B3 (GE-BA1-02 through GE-BA1-04)
BA1-B3R (GE-BA1-02 through GE-BA1-04)
BA1 -C1 (GE-BA1-08 & GE-BA1-09)
BA1-C2 (GE-BA1-06 & GE-BA1-07)
BA1-C3 (GE-BA1-05 & GE-BA1-06)
Notes:
C -( (-Q/(PV*R))t t-oe C, - initial concentration C1 - final concentration Cmax - maximum concentration gpm - gallons per minute MCL - maximum contaminant level ug/L - micrograms per liter R - retardation PV - pore volume Q -flow rate AWCA - Area-weighted concentration averaging FWCA - Flow rate-weighted concentration averaging C;
C; (ug/L)
Source 1720 FWCA 1139 FWCA 556 FWCA1 11nitial concentration for Area B2 equals final concentration for Area B1.
21nitial concentration for Area B3R equals final concentration for Area B2.
Is C; representative Cmax Cmax of Cmax?
(ug/L)
Source (YIN) 1720 FWCA y
1139 FWCA y
556 FWCA 1 y
BA 1 - Uranium Flow Rate PV" PV Q
(gpm)
R4 (ft3)
(liters)
(liters/day) 14 50.4 90,021 2,549,098 76,314 66 13.1 619,099 17,530,908 359,765 66 13.1 Time Required for Initial Cone. to Reach Max. Level (days) 0 0
0 cubic foot=
gpm Cr (ug/L) 114 556 0.0 28.3168 5451 Combined Influent c,
(ug/L) 16.0 liters liters per day Time Required for Combined Influent Cone. to Reach MCL (months) 116 31nitial concentration for Area C2 equals flow rate-weighted average concentration decayed over the duration of Area C1 operation. Note that wells GE-BA1-06 and GE-BA1-07 are located in Area B1 ; consequently Area B1 parameters are used to calculate the concentration decay.
4Retardation (R) and pore volume (PV) taken from remediation duration estimate calculations [DRAFT _Remediation Duration Estimates_Rev. B (09-10-18).xlsx].
ium BA1-A1 (GETR-BA1-01 BA1-B1 (GE-BA1-02 BA1-B2 (GE-BA1-02 1-B3R (GE-BA1-02 BA1.C1 (GE-BA1-08 &
Area
& GETR-BA1-02 throu h GE-BA1-04 throu h GE-BA1-04 OU h GE-BA1-04 GE-BA1-09 c,
u /L 1720 1139 99 35 Cmax u /L 1720 1139 99 35 Flow Rate m
14 66 86 20 R
50.4 13.1 13.1 13.1 (liters) 2,549,098 17,530,908 10,368,706 7,091,039 Q
(liters/day) 76,314 359,765 468,785 109,020 Time Required for Initial Cone. to Reach Mn. Level months 0
Cumulative Time A
B B2 B3R (Months)
C1 0
1720.000000 1138.727273 34.650000 1
1689.199612 1085.602640 33.431728 2
1658.950773 1034.956411 32.256290 1629.243606 986.672962 31.122180 4
1600.068411 940.642064 30.027944 5
1571.415663 896.758629 28.972181 1543.276005 854.922472 27.953538 1515.640249 815.038082 26.970710 1488.499373 777.014404 26.022437 1461.844513 740.764631 25.107505 10 1435.666968 706.206006 24.224741 11 1409.958189 673.259631 23.373015 12 13B4.7097B3 641.850292 22.551235 13 1359.913505 611.9062B2 21.758348 14 1335.561259 5B3.359239 20.993338
~~ 15 1311.645093 556.1 43990
~
~~-
20.255226 16 12B8.157199 17 1265.089908 18 1242.435687 19 1220.187140 20 1198.337002 21 1176.87B139 22 1155.803544 23 1135.106336 24 1114. 779757 25 1094.B17171 26 1075.212058 27 1055.958019 28 1037.048765 29 1018.478123 30 1000.240029 31 982.328529 32 964.737773 33 947.462019 34 930.495625 35 913.833051 36 897.46B858 37 8B1.397702 38 B65.614335 39 850.113604 40 834.89044B 41
~
819.939895 ---*-~
99.36428523 42 805.257066 89.43727224 43 790.837165 80.50201989 44 776.675484 72.45944609 45 762.767399 65.2203675B 46 749.108369 58.70451095 47 735.693934 52.83962256 4B 722.519714 47.56066727 49 709.581407 42.80910729 50 696.B747B9 38.53225305 51 684.395711 34.68267898 52 672.140099 31.21769753 53 660.103950 28.0988859 54 64B.283335 25.29165989 55 636.674395 22.76489049 56 625.273337 20.49055859 57 614.076441 18.44344437 58 603.0B0050 16.60084759 59 592.280574 14.94233589 60 581.674486 13.4495182 61 571.25B323 12.10584083 62 561.0286B5 10.B96403B7 63 550.9B2231 9.807795999 iii,,*
64 541.115681 B.827945764 65 531.425813 7.945987704 66 521.909463 7.152141877 67 512.563525 6.43760541 68 503.3B4946 5.794454882 69 494.370730 5.215558464 70 485.517933 4.694496832 71 476.823666 4.225491989 72 468.285088 3.803343188 73 459.899412 3.423369265 74 451.663900 3.0B1356729 75 443.575863
- 2. 773513039 76 435.632661 2.496424547 77 427.831699 2.247018648 7R 4?n 17n4~[)
2.02252ll705 BA1.C2 (GE-BA1-06 &
GE-BA1-07 C -c
(-Q/(PV*R))t c oe Months Da s C2 WEIGHTED AVERAGE for A1/B1/C1 Areas 999.29 100 0
0.0 959.67 100 1
30.4 921.78 100 2
60.8 885.52 100 3
91.3 850.84 100 4
121.7 817.65 100 5
152.1 785.90 100 6
182.5 755.51 100 7
212.9 726.42 100 8
243.4 698.58 100 9
273.8 671.93 100 10 304.2 646.42 100 11 334.6 621.99 100 12 365.0 598.60 100 13 395.5 576.19 100 14 425.9 554.74 100 15 456.3 530.19 100 16 486.7 504.82 100 17 517.1 480.92 100 18 547.6 458.40 100 19 578.0 437.17 100 20 608.4 417,16 100 21 638.8 398.29 100 22 669.2 380.49 100 23 699.7 363.68 100 24 730.1 347.82 100 25 760.5 332.85 100 __ 2_6_
790.S 318.70 100 27 821.3 305.32 100 28 851.8 292.68 100 29 882.2 280.73 100 30 912.6 269.42 100 31 943.0 258.71 100 32 973.4 248.57 100 33 1003.9 238,97 100 34 1034.3 229.87 100 35 1064.7 221.24 100 36 1095.1 213.05 100 37 1125.5 205.28 100 38 1156.0 197.90 100 39 1186.4 190.89 100 40 1216.8 184.23 100 41 1247.2 189.65 100 42 1277.6 179.95 100 43 1308.1 171.05 100 44 1338.5 162.88 100 45 1368.9 155.36 100 46 1399.3 148.44 100 47 1429.7 142.05 100 48 1460.2 136.16 100 49 1490.6 130.70 100 50 1521.0 125.64 100 51 1551.4 120.95 100 52 1581.8 116.58 100 53 1612.3 112.51 100 54 1642.7 108.71 100 55 1673.1 105.16 100 56 1703.5 101.83 100 57 1733.9 98.71 100 58 1764.4 95.77 100 59 1794.B 93.00 100 60 1825.2 90.39 100 61 1855.6 87.91 100 62 18B6.0 85.57 100 63 1916.5 83.35 100 64 1946.9 81.23 100 65 1977.3 79.22 100 66 2007.7 77.30 100 67 203B.1 75.46 100 68 206B.6 73.70 100 69 2099.0 72.01 100 70 2129.4 70.39 100 71 2159.8 68.83 100 72 2190.2 67.33 100 73 2220.7 65.88 100 74 2251.1 64.49 100 75 22B1.5 63.14 100 76 2311.9 61.83 100 77 2342.3 60.56 100 78 2372.8 1 of 2 Months 3
4 5
6 7
8 9
10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 IIIDDI IIID1DII Ill I 91.3 121.7 152.1 182.5 212.9 243.4 I I I I
I 273.8 304.2 334.6 365.0 395.5 425.9 456.3 486.7 517.1 547.6 578.0 608.4 638.8 669.2 699.7 730.1 760.5 790.9 I I I I I
I I I I I
i I
i I
i I
I I
i I
I I '
I 1111 I I I
I EllD Months Da s for 83R Aea Notes 1--~---,--~--l -----------------
,---~---,---
3 o_0
_o 4
_, According to remediation duration calculations, the uranium MCL is achieved in Area C2 in 25.4 months.
2 60.8 3
91.3 4
121.7 5
152.1 6
182.5 7
212.9 8
243.4 9
273.8 10 304.2 11 334.6 12 365.0 13 395.5 14 425.9 15 456.3 16 486.7 17 517.1 18 547.6 19 57B.O 20 608.4 21 63B.B 22 669.2 According to remediation duration calculations, the uranium MCL is achieved in Area B3R in 22.6 months; however
~-2~3~
~6_9_9_.7-=-, groundwater extraction vvill continue in Area B3R to maintain the minimum treatment system flow rate.
24 730.1 25 760.5 26 790.9 27 821.3 28 851.8 29 882.2 30 912.6 31 943.0 32 973.4 33 1003.9 34 1034.3 35 1064.7 36 1095.1 37 1125,5
BA1-A1 (GETR-BA1-01 BA1-B1 (GE-BA1-02 1-B3R (GE-BA1-02 BA1-C1 (GE-BA1-08 &
BA1-C2 (GE-BA1-06 &
Area
& GETR-BA1-02 throu h GE-BA1-04 rou h GE-BA1-04 GE-BA1-09 GE-BA1-07 c,
u /L 1720 1139 99 35 emu u /L 1720 1139 99 35 Flow Rate m
14 66 86 20 R
50.4 13.1 13.1 13.1 (liters) 2,549,098 17,530,908 10,368,706 7,091,039 Q
(liters/day) 76,314 359,765 468,785 109,020 Time Required for Initial Cone. to Reach Max. Level months Cumulative Time A
B (Months)
B2 B3R C1 C2 79 412.646353 1.820468385 80 405.257011 1.63859405 81 397.999992 1.474889915 82 390.872926 1.32754068 83 383.873485 1.1 94912407 84 376.999385 1.075534394 85 370.248381 0.968082869 86 363.618268 0.871366316 87 357.106882 0.784312253 88 350.712097
- 0. 70595534 7 89 344.431825 0.635426707 90 338.264014 0.571944248 91 332.206652 0.51480402 92 326.257761 0.463372399 93 320.415397 0.417079067 94 314.677654 0.375410682 95 309.042657 0.337905187 96 303.508568 0.304146687 97 298.073578 0.273760839 98 292.735915 0.246410696 99 287.493833 0.221792976 100 282.345623 0.199634695 101 277.289603 0.179690142 102 272.324122 0.161738155 103 267.447559 0.145579665 104 262.658321 0.131 035494 105 257.954846 0.117944361 106 253.335596 0.1 06161 101 107 248.799064 0.095555051 108 244.343769 0.0860086 109 239.968256 0.07741589 110 235.671 096 0.069681637 111 231.450886 0.062720076 112 227.306248 0.056454012 113 223.235829 0.05081396 114 219.238300 0.045737379 115 215.312355 0.041167975 211.456713 0.037055078 117 207.670115 0.033353082 118 203.951325 0.030020934 119 200.299127 0.027021685 120 196.712330 0.024322077 121 193.189762 0.021892174 122 189.730274 0.019705031 123 186.332736 0.017736395 124 182.996038 0.015964437 125 179.719091 0.014369506 126 176.500825 0.012933917 127 173.340189 0.011641751 128 170.236151 0.010478679 129 167.187698 0.009431804 130 164.193834 0.008489517 131 161.253582 0.00764137 132 158.365981 0.006877957 133 155.530090 0.006190813 134 152.744981 0.005572318 135 150.009746 0.005015615 136 147.323491 0.004514528 137 144.685339 0.004063503 138 142.094430 0.003657538 139 139.549916 0.003292131 140 137.050967 0.00296323 141 134.596768 0.002667187 142 132.186516 0.002400721 143 129.819426 0.002160877 144 127.494723 0.001944994 145 125.211649 0.001750679 146 122.969459 0.001575777 147 120.767420 0.001418348 148 118.604813 0.001276648 149 116.480933 0.001149104
~.
150 t.
11 4.395085 0.001034303 C -( (-Q/(PV*R))t c oe Months Combined Influent Flow Da s AVERAGE Rate for A1/B1 /C1 Areas 59.34 100 79 2403.2 58.15 100 BO 2433.6 56.99 100 81 2464.0 55.86 100 82 2494.4 54.77 100 83 2524.9 53.70 100 84 2555.3 52.67 100 85 2585.7 51.66 100 86 2616.1 50.67 100 87 2646.5 49.71 100 88 2677.0 48.77 100 89 2707.4 47.85 100 90 2737.8 46.95 100 91 2768.2 46.07 100 92 2798.6 45.22 100 93 2829.1 44.38 100 94 2859.5 43.56 100 95 2889.9 42.75 100 96 2920.3 41.97 100 97 2950.7 41.19 100 98 2981.2 40.44 100 99 3011.6 39.70 100 100 3042.0 38.98 100 101 3072.4 38.26 100 102 3102.8 37.57 100 103 3133.3 36.88 100 104 3163.7 36.22 100 105 3194.1 35.56 100 106 3224.5 34.91 100 107 3254.9 34.28 100 108 3285.4 33.66 100 109 3315.8 33.05 100 110 3346.2 32.46 100 11 1 3376.6 31.87 100 112 3407.0 31.30 100 113 3437.5 30.73 100 114 3467.9 30.18 100 115 3498.3 100 116 3528.7 29.10 100 117 3559.1 28.58 100 118 3589.6 28.07 100 119 3620.0 27.56 100 120 3650.4 27.07 100 121 3680.8 26.58 100 122 3711.2 26.10 100 123 3741.7 25.63 100 124 3772.1 25.17 100 125 3802.5 24.72 100 126 3832.9 24.28 100 127 3863.3 23.84 100 128 3893.8 23.41 100 129 3924.2 22.99 100 130 3954.6 22.58 100 131 3985.0 22.18 100 132 4015.4 21.78 100 133 4045.9 21.39 100 134 4076.3 21.01 100 135 4106.7 20.63 100 136 4137.1 20.26 100 137 4167.5 19.90 100 138 4198.0 19.54 100 139 4228.4 19.19 100 140 4258.8 18.85 100 141 4289.2 18.51 100 142 4319.6 18.18 100 143 4350.1 17.85 100 144 4380.5 17.53 100 145 4410.9 17.22 100 146 4441.3 16.91 100 147 4471.7 16.61 100 148 4502.2 16.31 100 149 4532.6 16.02 100 150 4563.0 2 of2 Months Months Da s for 82/C2 Areas for 83R Aea Notes 64 38 1156.0 65 39 1186.4 66 40 1216.8 67 41 1247.2 68 42 1277.6 69 2099 43 1308.1 70 2129 44 1338.5 71 2159 45 1368.9 72 2190 46 1399.3 73 222 47 1429.7 74 48 1460.2 75 49 1490.6 76 50 1521.0
- 51 1551.4 78 52 1581.8 79 53 1612.3 80 54 1642.7 81 55 1673.1 82 56 1703.5 83 57 1733.9 84 58 1764.4 85 59 1794.8 86 60 1825.2 87 61 1855.6 88 267 62 1886.0 89 2707 63 1916.5 90 2737 64 1946.9 91 65 1977.3 92 66 2007.7 93 67 2038.1 94 68 2068.6 95 69 2099.0 96 70 2129.4 97 71 2159.8 98 72 21 90.2 99 73 2220.7 100 74 2251.1 101 3072.
75 2281.5 102 76 2311.9 103 77 2342.3 104 78 2372.8 105 79 2403.2 106 BO 2433.6 107 81 2464.0 108 82 2494.4 109 83 2524.9 110 84 2555.3 111 85 2585.7 112 86 2616.1 113 87 2646.5 114 88 2677.0 115 89 2707.4 116 90 2737.8 117 91 2768.2 118 92 2798.6 119 93 2829.1 120 94 2859.5 121 95 2889.9 122 96 4920.3 123 97 2950.7 124 98 2981.2 125 99 3011.6 126 100 3042.0 127 101 3072.4 128 102 3102.8 129 103 3133.3 130 104 3163.7 131 105 3194.1 132 106 3224.5 133 107 3254.9 134 108 3285.4 135 109 3315.8 According to remediation duration calculations, the uranium MCL is achieved in Area A in 149.1 months.
0.2b -WA Influent Concentration Decline Analysis
10/23/18 Note: the estimates provided below are preliminary in nature and will require revision during 90% Water Treatment Design Basis development associated with the Groundwater Remediation Project being conducted for the Cimarron Environmental Response Trust.
350.0 300.0 250.0
~ 200.0 C
Q -
~
C V u C
0 u E
- i
~ 150.0 100.0 50.0 00 I
1 t
l l
I
' ~
' ---~-'
I I
I I
' r--..... r----....................... r--....................... r.............__
~ ~
~
\\
~
~
Western Area Uranium Concentration Trends Combined Influent j
i
, I I I
I I
I I
wF IGHTFD AVERA GE I
wuPBA WU-1348 WAAU>DCGL I
1206--NORTH I
I WAA-WEST I
I I
WAA-Bl.LIFF I
WAA-EAST I
I I
I I
Uranium Concentration - Combined Influent Month 0: 81.8 ug/L Month 50: 48.5 ug/L Month 100: 31.6 ug/L Month 150: 20.8 ug/L
~
I
.......... r---............
I I
~
I
~ ----- ----- --
I Months from Treatment Start I
I I
I I I I
t-I I I I
I i I I
I I
i I
i I
I I
I I
! I I
10/23/18 Note: the estimates provided below are preliminary in nature and will require revision during 90% Water Treatment Design Basis development associated with the Groundwater Remediation Project being conducted for the Cimarron Environmental Response Trust.
350.0 300.0 250.0 01! 200.0 2..
2
~
C:
V u C:
0 u V
"'ro
~ 150.0 z
100.0 50.0 0.0 I
I I
I I
1,
~
I~ ----~ -
1~ I'----. ~
r--..
\\
I I
I I
I
~*
-... \\ I\\
I\\~
~
~
~
~~
I
~
I p...~
~
~
~
~
~
....... r--... r---.. ~
I'--. "'---
Western Area Nitrate Concentration Trends Combined Influent I
I I
I WEIGHTED AVERAGE I
I wu-PBA I
wU-1348 I
WAAU>DCGL 1206-IIIORTH WAA-WEST I
WM-BLUFF I
WAA-1-.ASI I I I
I I
I I
I I
I I Nit rate Concentration - Combined Influent Month 0: 70.5 mg/L Month 50: 72.4 mg/L Month 100: 30.2 mg/L Month 150: 13.3 mg/L i
I I
I l
I
~
I I
I I
~
I I
' ~
I
~
I
~
~
~
I'-..
"""' "' ~
I
~
~
r-----
I r---.. ~
~
~
I
~
I----.
I i---
r--,...
,-.... i---.
t---.. r---,.."--
--I"'--
r---.. i--...
Months from Treatment Start I
I I I i l
! i :
I l
t I I
l '
I I
I I
Remediation Area
~U-PBA (GE-WU-01)
WU-1348 (GETR-WU-01)
WAA U>DCGL (GE-WAA-01 through GE-WAA-04) 1206-NORTH (GETR-WU-02)
~AA-WEST (GE-WAA-05)
~AA-BLUFF (GE-WAA-06 through GE-WAA-13)
WAA-EAST (GE-WAA-14 & GE-WAA-15)
Remediation Area WU-PBA (GE-WU-01)
WU-1348 (GETR-WU-01)
WAA U>DCGL (GE-WAA-01 through GE-WAA-04) 1206-NORTH (GETR-WU-02)
WAA-WEST (GE-WAA-05)
WAA-BLUFF (GE-WAA-06 through GE-WAA-13)
WAA-EAST (GE-WAA-14 & GE-WAA-15)
Remediation Area WU-PBA (GE-WU-01)
WU-1348 (GETR-WU-01)
WAA U>DCGL (GE-WAA-01 through GE-WAA-04) 1206-NORTH (GETR-WU-02)
WAA-WEST (GE-WAA-05)
WAA-BLUFF (GE-WAA-06 through GE-WAA-13)
~AA-EAST (GE-WAA-14 & GE-WAA-15)
Notes:
C -( (-Q/(PV*R))t t-oe C1 - initial concentration C, - 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 Is C; representative C;
C; Cmax Cmax ofCma,?
(ug/L)
Source (ug/L)
Source (YIN) 29.0 SIC 29.0 SIC y
62.0 LWCA 62.0 LWCA y
147 FWCA 147 FWCA y
304 LWCA 304 LWCA y
58.6 SIC 58.6 SIC y
14.27 FWCA 22.29 AWCA/FWCA N
51.1 FWCA 51.1 FWCA y
Combined Treatment System Influent Flow Rate" Is C1 representative C;4 C;
Cma, 4
- Cma, of Cma,?
(mg/L)
Source (mg/L)
Source (YIN) 61.7 SIC 61.7 SIC y
11.6 11.6 y
35.8 FWCA 35.8 FWCA y
38.6 LWCA 38.6 LWCA y
10.2 10.2 y
h -
114 FWCA 313 AWCA/FWCA N
72.2 FWCA 72.2 FWCA y
Combined Treatment System Influent Flow Rate*
WATF - Fluoride Is C1 representative C;
C;
- Cma, Cma, of Cma,?
(mg/L)
Source (mg/L)
Source (Y/N) 0.32 SIC 0.32 SIC y
1.00 LWCA 1.00 LWCA y
2.27 FWCA 2.27 FWCA y
7.03 LWCA 7.03 LWCA y
0.45 SIC 0.45 SIC y
2.19 FWCA 11.93 AWCA/FWCA N
0.45 FWCA 0.45 FWCA y
WATF - Uranium Flow Rate Pv1,2,J (gpm)
R1 (ft3) 5 110 231,264.20 4
55.3 61,800.20 99 13.1 4,177,558.50 B
50.4 3,013.56 10 13.1 2,387,058.00 104 13.1 6,811,932.00 20 13.1 4,716,356.70 250 WATF - Nitrate Flow Rate pv1,Z,3 (gpm)
R1 (ft3) 5 22.7 231,264 4
11.9 61,800 99 4.62 4,177,559 8
10.9 3,014 10 4.62 2,387,058 104 4.62 6,811,932 20 4.62 4,716,357 250 1 Retardation (R) and pore volume (PV) taken from remediation duration estimate calculations [DRAFT _Remediation Duration Estimates_Rev. B (09-10-1 B).xlsx].
PV Q
(liters)
(liters/day) 6,548,662.10 27,254.95 1,749,983.90 21,803.96 118,295,088.53 539,648.05 85,334.38 43,607.92 67,593,843.97 54,509.90 192,892,1 16.06 566,903.00 133,552,129.40 109,019.81 PV Q
(liters)
(liters/day) 6,548,662 27,255 1,749,984 21,804 118,295,089 539,648 85,334 43,608 67,593,844 54,510 192,892,1 16 566,903 133,552,129 109,020 Time Required for Initial Cone. to Reach Max. Level (days)2 0
0 0
0 0
365 0
Time Required for Initial Cone. to Reach Max. Level (days)2 0
0 0
0 0
365 0
cubic foot=
gpm =
c, (ug/L) 24.4 26.0 29.9 13.9 44.2 8.7 38.4 c,
(mg/L) 26.8 0.20 0.40 0.00 4.61 22 32.3 28.3168 5451 Combined Influent c,
(ug/L) 20.8 Combined Influent c,
(mg/L) 13.27 liters liters per day Time Required for Combined Influent Cone. to Reach MCL (months) 107 Time Required for Combined Influent Cone. to Reach MCL (months) 2Based on forward particle tracking results for WU-UP1 and WU-UP2 injection components, and uranium and nitrate plume distribution depicted on isopleth maps, maxium uranium and nitrate groundwater concentrations will report to WAA "BLUFF" extraction wells approximately 1 year following intiation of water injection at UP1 and UP2.
3The WAA "BLUFF" pore voluem is inconsequential for remediation duration since the remediation timeframe for this area is predicated on UP1/UP2 remediation timeframe.
4Since intial nitrate groundwater concentrations for WU "1206 SOUTH" and WAA "U<DCGL" WEST are below the applicable remediation criteria, the highest representative nitrate concentration for any well in each area was used in the influent concentration decay analysis.
5The combined influent flow rate presented in the table reflects initial operating conditions. The influent flow rate is expected to decline over the course of the remediation campaign. Combined influent flow rates for each month of remediation are provided in the concentration decay analysis tables.
Western Area Combined Influent - Uranium WAA U>OCGL (GE-WAA-WEST (GE-WAA-WU-1348 (GETR-WU-WU-PBA (GE-WU-01)
WAA-01 through GE-Area WAA-04l
- 05)
- 01)
C; lug/L) 29.02 146.94 58.64 61.98 Cm.,
luo/Ll 29.02 146.94 58.64 61.98 Flow Rate (opm) 5 99 10 4
R 109.6 13.1 13.1 55.3 PV (liters) 6,548,662 118,295,089 67,593,844 1,749,984 Q
(litersldav) 27,255 539,648 54,510 21,804 Time Required for Initial Cone. to Reach Max. Level (months) 0 0
0 0
Cumulative Time (Months)
WU..PBA WAAU>DCGL WAA-WEST WU-1348 0
29.020000 146.936364 58.640000 61.975537 1
28.986497 145.384107 58.530011 61.552218 2
28.953032 143.848249 58.420228 61.131790 3
28.919606 142.328616 58.310652 60.714234 4
28.886219 140.825037 58.201281 60.299529 5
28.852870 139.337341 58.092114 59.887658 6
28.819559 137.865362 57.983153 59.478599 7
28.786287 136.408933 57.874396 59.072335 8
28.753054 134.967890 57.765843 58.668845 9
28.719859 133.542070 57.657494 58.268112 10 28.686702 132.131313 57.549348 57.870116 11 28.653583 130.735459 57.441405 57.474838 12 28.620503 129.354351 57.333664 57 082260 13 28.587461 127.987834 57.226125 56.692364 14 28.554457 126.635753 57.118788 56.305131 15 28.521491 125.297955 57.011653 55.920543 16 28.488563 123.974290 56.904718 55.538581 17 28.455673 122.664608 56.797984 55.159229 18 28.422822 121.368762 56.691450 54.782468 19 28.390008 120.086605 56.585116 54.408280 20 28.357232 118.817993 56.478981 54.036648 21 28.324493 117.562783 56.373045 53.667555 22 28.291793 116.320834 56.267309 53.300982 23 28.259130 115.092004 56.161770 52.936914 24 28.226506 113.876156 56.056429 52.575332 25 28.193918 112.673152 55.951286 52.216220 26 28.161369 111.482857 55.846340 51.859561 27 28.128857 110.305137 55.741592 51.505338 28 28.096382 109.139858 55.637039 51.153534 29 28.063945 107.986889 55.532683 50.804133 30 28.031545 106.846100 55.428522 50.457119 31 27.999183 105.717363 55.324557 50.112476 32 27.966858 104.600550 55.220786 49.770186 33 27.934571 103.495535 55.117211 49.430234 34 27.902321 102.402194 55.013829 49.092604 35 27.870108 101.320403 54.910642 48.757281 36 27.837932 100.250040 54.807648 48.424248 37 27.805793 99.190984 54.704847 48.093489 38 27.773692 98.143117 54.602239 47.764990 39 27.741627 97.106319 54.499824 47.438735 40 27.709600 96.080474 54.397601 47.114708 41 27.677609 95.065467 54.295569 46.792894 42 27.645656 94.061182 54.193729 46.473279 43 27.613739 93.067506 54.092079 46.155846 44 27.581859 92.084328 53.990621 45.840582 45 27.550016 91.111536 53.889353 45.527471 46 27.518210 90.149021 53.788274 45.216499 47 27.486440 89.196674 53.687386 44.907651 48 27.454708 88.254388 53.586686 44.600912 49 27.423011 87.322056 53.486175 44.296269 50 27.391352 86.399574 53.385853 43.993706 51 27.359729 85.486837 53.285719 43.693211 52 27.328142 84.583742 53.185773 43.394767 53 27.296592 83.690187 53.086015 43.098362 54 27.265078 82.806072 52.986443 42.803982 55 27.233601 81.931297 52.887058 42.511612 56 27.202160 81.065764 52.787860 42.221240 57 27.170755 80.209374 52.688848 41.932851 58 27.139387 79.362031 52.590021 41.646431 59 27.108055 78.523639 52.491380 41.361968 60 27.076759 77.694104 52.392924 41.079448 61 27.045499 76.873333 52.294652 40.798858 62 27.014275 76.061232 52.196565 40.520184 63 26.983087 75.257711 52.098662 40.243414 64 26.951936 74.462678 52.000942 39.968534 65 26.920820 73.676043 51.903406 39.695532 66 26.889740 72.897719 51.806053 39.424395 67 26.858696 72.127618 51.708882 39.155109 68 26.827688 71.365651 51.611893 38.887663 69 26.796716 70.611735 51.515087 38.622043 70 26.765779 69.865782 51.418462 38.358238 71 26.734878 69.127710 51.322018 38.096235 72 26.704013 68.397436 51.225755 37.836022 73 26.673183 67.674875 51.129673 37.577585 74 26.642389 66.959949 51.033771 37.320914 75 26.611631 66.252574 50.938048 37.065996 76 26.580908 65.552673 50.842506 36.812820 77 26.550221 64.860165 50.747142 36.561372 78 26.519569 64.174973 50.651958 36.311642 79 26.488952 63.497020 50.556952 36.063618 WAA-EAST (GE-WAA-WAA-BLUFF (GE-WAA-1206-NORTH (GETR-06 through GE-WAA-14 & GE-WAA-15) 131 WU-02) 51.13 14.27 303.55 51.13 22.29 303.55 20 104 8
13.1 13.1 50.4 133,552,129 192,892,116 85,334 109,020 566,903 43,608 0
365 0
WAA-EAST WAA-BLUFF 1206-NORTH 51.130000 14.269519 303.545455 51.032924 14.172219 222.932518 50.936032 14.075583 163.728058 50.839324 13.979605 120.246598 50.742800 13.884282 88.312562 50.646459 13.789608 64.859287 50.550301 13.695581 47.634527 50.454326 13.602194 34.984168 50.358533 13.509444 25.693380 50.262921 13.417327 18.869958 50.167491 13.325838 13.858640 50.072243 13.234973 10.178184 49.977175 13.144727 7.475151 49.882288 22.287500 5.489966 49.787581 22.135527 4.031989 49.693053 21.984591 2.961209 49.598705 21.834684 2.174797 49.504537 21.685799 1.597234 49.410547 21.537929 1.173054 49.316735 21.391 068 0.861525 49.223102 21.245208 0.632729 49.129646 21.100343 0.464694 49.036368 20.956465 0.341285 48.943267 20.813568 0.250649 48.850343 20.671646 0.184084 48.757595 20.530692 0.135197 48.665023 20.390698 0.099292 48.572627 20.251660 0.072923 48.480406 20.113569 0.053557 48.388361 19.976420 0.039334 48.296490 19.840206 0.028888 48.204794 19.704921 0.021216 48.113271 19.570558 0.015582 48.021923 19.437112 0.011444 47.930748 19.304575 0.008405 47.839746 19.172942 0.006173 47.748917 19.042207 0.004533 47.658260 18.912364 0.003329 47.567776 18.783405 0.002445 47.477463 18.655326 0.001796 47.387321 18.528120 0.001319 47.297351 18.401782 0.000969 47.207552 18.276305 0.000711 47.117923 18.151684 0.000522 47.028464 18.027912 0.000384 46.939176 17.904985 0.000282 46.850056 17.782895 0.000207 46.761106 17.661639 0.000152 46.672325 17.541209 0.000112 46.583712 17.421600 0.000082 46.495268 17.302807 0.000060 46.406991 17.184823 0.000044 46.318882 17.067645 0.000032 46.230941 16.951265 0.000024 46.143166 16.835679 0.000018 46.055558 16.720881 0.000013 45.968116 16.606865 0.000009 45.880841 16.493628 0.000007 45.793731 16.381162 0.000005 45.706786 16.269463 0.000004 45.620007 16.158526 0.000003 45.533392 16.048345 0.000002 45.446942 15.938916 0.000001 45.360656 15.830233 0.000001 45.274533 15.722290 0.000001 45.188575 15.615084 0.000001 45.102779 15.508609 0.000000 45.017146 15.402860 0.000000 44.931676 15.297832 0.000000 44.846368 15.193520 0.000000 44.761222 15.089920 0.000000 44.676238 14.987025 0.000000 44.591415 14.884833 0.000000 44.506753 14.783337 0.000000 44.422252 14.682534 0.000000 44.337912 14.582417 0.000000 44.253731 14.482984 0.000000 44.169710 14.384228 0.000000 44.085849 14.286146 0.000000 44.002147 14.188732 0.000000 C -c
(-Q/(PV*R))t t-oe I I Combined WEIGHTED Influent Flow AVERAGE Rate Months 81.84 250 0
78.59 250 1
76.03 250 2
73.97 250 3
72.30 250 4
70.90 250 5
69.71 250 6
68.67 250 7
67.74 250 8
66.90 250 9
66.13 250 10 65.40 242 11 84.71 242 12 67.89 242 13 67.22 242 14 66.58 242 15 65.95 242 16 65.33 242 17 64.72 242 18 64.13 242 19 63.54 242 20 62.96 242 21 62.38 242 22 61.82 242 23 61.26 242 24 60.70 242 25 60.15 242 26 59.61 242 27 59.07 242 28 58.54 242 29 58.01 242 30 57.49 242 31 56.98 242 32 56.47 242 33 55.96 242 34 55.46 242 35 54.96 242 36 54.47 242 37 53.99 242 38 53.51 242 39 53.03 242 40 52.56 242 41 52.09 242 42 51.63 242 43 51.17 242 44 50.72 242 45 50.27 242 46 49.113 242 47 49.39 242 48 48.95 242 49 48.52 242 50 48.09 242 51 47.67 242 52 47.25 242 53 46.84 242 54 46.43 242 55 46 02 242 56 45.62 242 57 45.22 242 58 44.82 242 59 44.43 242 60 44.05 242 61 43.66 242 62 43.28 242 63 42.91 242 64 42.54 242 65 42.17 242 66 41.80 242 67 41.44 242 68 41.08 242 69 40.73 242 70 40.38 242 71 40.03 242 72 39.69 242 73 39.35 242 74 39.01 242 75 38.68 242 76 38.35 242 77 38.02 242 78 37.70 242 79 1 of 2 Davs 0.0 30.4 60.8 91.3 121.7 152.1 182.5 212.9 243.4 273.8 304.2 334.6 365.0 395.5 425.9 I 456.3 I 486.7 517.1 I
547.6 578.0 I 608.4 638.8 669.2 699.7 730.1 760.5 790.9 821.3 851.8 882.2 912,6 943.0 973.4 1003.9 1034.3 1064.7 1095.1 1125.5 1156.0 1186.4 1216.8 1247.2 1277.6 1308.1 1338.5 1368.9 1399.3 1429.7 1460.2 1490.6 1521.0 1551.4 1581.8 1612.3 1642.7 1673.1 1703.5 1733.9 1764.4 1794.8 1825.2 1855.6 1886.0 1916.5 1946.9 1977.3 2007.7 2038.1 2068.6 2099.0 2129.4 2159.8 2190.2 2220.7 2251.1 2281.5 2311.9 2342.3 2372.8 2403.2 Notes According to remediation duration calculations for 1206 North, uranium and nitrate remediation goals (NRC and State Criteria) are both met at 9.3 months; however 1206 North groundwater extraction will continue until water injection in WU-BA3 is discontinued in Month 83.
According to remediation duration calculations for UP1 and UP2, uranium and nitrate remediation goals (NRC and State Criteria) are both met at 57 Months.
However, groundwater extraction will continue in the WAA "BLUFF" Area to maintain the minimum treatment system flow rate.
Western Area Combined Influent - Uranium WAA U>DCGL (GE-WAA-WEST (GE-WAA-WU-PBA (GE-WU-01)
WAA-01 through GE-Area WAA-041
- 05)
C; (ug/L) 29.02 146.94 58.64 Cm.,
(ug/Ll 29.02 146.94 58.64 Flow Rate (Qom) 5 99 10 R
109.6 13.1 13.1 PV (liters) 6.548,662 118,295,089 67,593,844 Q
(liters/day) 27,255 539,648 54,510 Time Required for Initial Cone. to Reach Max. Level (months) 0 0
0 Cumulative Time WU-PBA WAAU>DCGL WAA-WEST (Months) 80 26.458371 62.826228 50.462124 81 26.427825 62.162523 50.367474 82 26.397314 61.505830 50.273001 83 26.366839 60.856074 50.178706 84 26.336398 60.213181 50.084588 85 26.305993 59.577081 49.990646 86 26.275623 58.947700 49.896880 87 26.245288 58.324969 49.803290 88 26.214988 57.708815 49.709876 89 26.184723 57.099171 49.616637 90 26.154493 56.495968 49.523573 91 26.124298 55.899136 49.430683 92 26.094138 55.308610 49.337968 93 26.064012 54.724322 49.245427 94 26.033922 54.146207 49.153059 95 26.003866 53.574199 49.060864 96 25.973845 53.008233 48,968842 97 25.943858 52.448247 48,876993 98 25.913906 51.894176 46.765317 99 25.883989 51.345959 48.693812 100 25.854106 50.803533 48.602478 101 25.824257 50.266837 48.511317 102 25.794444 49.735811 48.420326 103 25.764664 49.210395 48.329505 104 25.734919 48.690530 48.238855 105 25.705208 48.176156 48.148376 106 25.675532 47.667216 48.058065 I
25.645890 47.163653 47.967925 108 25.616282 46.665410 47.877953 109 25.586708 46.172430 47.788150 110 25.557168 45.684658 47.698515 111 25.527663 45.202039 47,609049 112 25.498191 44.724518 47,519750 113 25.468754 44.252042 47.430619 114 25.439350 43.7B4557 47.341655 115 25.409981 43.322011 47.252858 116 25.3B0645 42.864351 47.164228 117 25.351344 42.411526 47 075764 118 25.322076 41.963485 46.987465 119 25.292842 41.520177 46.899333 120 25.263641 41.0B1552 46.811365 121 25.234475 40.647561 46.723563 122 25.205342 40.218154 46.635925 123 25.176242 39.793284 46.548452 124 25.147176 39.372902 46.461143 125 25.118144 38.956961 46.373997 126 25.089146 38.545414 46.287015 127 25.060180 38.138215 46.200196 128 25.031249 37.735318 46.1 13540 129 25.002350 37.336676 46.027047 130 24.973485 36.942247 45.940715 131 24.944654 36.551983 45.854546 132 24.915855 36.165843 45.768538 133 24.887090 35.783782 45.682692 134 24.858358 35.405757 45.597006 135 24.829659 35.031726 45.511482 136 24.800994 34.661646 45.426117 137 24.772361 34.295475 45.340913 138 24.743762 33.933173 45.255869 139 24,715195 33.574698 45.170984 140 24.686662 33.220011 45.086259 141 24.658161 32.869070 45.001692 142 24.629694 32.521836 44.917284 143 24.601259 32.178271 44.833034 144 24.572857 31.838335 44.748942 145 24.544488 31.501991 44.665008 146 24.516151 31.169199 44.581232 147 24.487848 30.839923 44.497613 148 24.459577 30.514126 44.414150 149 24.431338 30.191771 44.330844 150 24.403133 29.872820 44.247694 WU-1348 (GETR-WU-WAA-EAST (GE-WAA-WAA-BLUFF (GE-WAA-1206-NORTH (GETR-06 through GE-WAA-
- 01) 14 & GE-WAA-15) 13}
WU-02) 61.98 51.13 14.27 303.55 61.98 51.13 22.29 303.55 4
20 104 8
55.3 13.1 13.1 50.4 1,749,984 133,552,129 192,892,116 85,334 21,804 109,020 566,903 43,608 0
0 365 0
WU-1348 WAA-EAST WAA-BLUFF 1206-NORTH 35.817288 43.918604 14.091983 0,000000 35.572641 43.835220 13.995894 0.000000 35.329665 43.751994 13.900459 0.000000 35.088348 43.668926 13.805676 0,000000 34.848679 43.586015 13.711539 34.610648 43.503262 13.618043 34.374242 43.420667 13.525185 34.139451 43.338227 13.432961 33.906264 43.255945 13.341365 33.674670 43.173819 13.250394 33.444658 43.091848 13.160043 33.216216 43.010034 13.070308 32.989335 42.928374 12.981185 32.764004 42.846870 12.892670 32.540212 42.765520 12.804758 32.317948 42.684325 12.717446 32.097203 42.603284 12.630729 31.877965 42.522397 12.544603 31.660225 42.441663 12.459065 31.443972 42.361083 12.3741 10 31.229196 42.280656 12.289734 31.015887 42.200381 12.205934 30.804035 42.120259 12.122705 30.593631 42.040289 12.040043 30.364663 41.960471 11.957945 30.177123 41.880804 11.876407 29.971000 41.801289 11.795425 29.766285 41.721924 11.714995 29.562969 41.642710 11.635114 29.361041 41.563647 11.555777 29.160492 41.484734 11.476961 28.961314 41.405970 11.398723 28.763496 41.327356 11.320998 28.567029 41.248892 11.243803 28.371904 41.170576 11.167135 28.178111 41.092409 11.090989 27.985643 41.014391 11.015362 27.794489 40.936520 10.940252 27.604640 40.B58797 10.865653 27.416089 40.781222 10.791563 27.228B25 40.703795 10.717978 27.042841 40.626514 10.644895 26.858126 40.549380 10.572310 26.674674 40.472392 10.500221 26.492474 40.395551 10.428622 26.311520 40.318855 10.357512 26.131801 40.242306 10.286887 25.953309 40.165901 10.216744 40.089642 10.147078 40.013527 10.077888 39.937557 10.009170 39.861731 9.940920 39.786049 9.873135 39.710510 9.805813 39.635115 9.738950 39.559864 9.672543 39.484755 9.606588 39.409789 9.541083 39.334965 9.476025 39.260283 9.411411 39.185743 9.347237 39.111344 9.283500 39.037087 9.220199 38.962971 9.157329 38.888995 9.094887 38.815160 9.032872 38.741465 8.971279 38.667910 8.910106 38.594495 8.849350 38.521219 8.789009 38.448082 8.729079 C -c
(-Q/(PV*R))t t-oe I I Combined WEIGHTED Influent Flow AVERAGE Rate Months 37.38 242 80 37.08 242 81 36.74 242 82 36.43 242 83 36.12 242 84 35.82 242 85 35.51 242 86 35.22 242 87 34,92 242 88 34.62 242 89 34.33 242 90 34.05 242 91 33.76 242 92 33.48 242 93 33.20 242 94 32.92 242 95 32,65 242 96 32.37 242 97 32.10 242 98 31.84 242 99 31.57 242 100 31.31 242 101 31.05 242 102 30.80 242 103 30.54 242 104 30.29 242 105 30.04 242 106 242 107 29.55 242 108 29.31 242 109 29.07 242 110 28.83 242 111 28.60 242 112 28.36 242 113 28.13 242 11 4 27.91 242 11 5 27.68 242 116 27.48 242 11 7 27.23 242 118 27.01 242 119 26.80 242 120 26.58 242 121 26.37 242 122 26.16 242 123 25.95 242 124 25.74 242 125 25 53 242 126 25.33 242 127 24.72 238 128 24.52 238 129 24.33 238 130 24.13 2311 131 23.94 238 132 23.75 238 133 23.56 238 134 23.38 238 135 23.19 238 136 23.01 238 137 22.83 238 138 22.65 238 139 22.48 238 140 22.30 238 141 22.13 238 142 21.95 238 143 21.78 238 144 21.62 238 145 21.45 238 146 21.28 238 147 21.12 238 148 20.96 238 149 20.79 238 150 2 of2 Davs 2433.6 2464.0 2494.4 2524.9 2555.3 2585.7 2616. 1 2646.5 2677.0 2707.4 I 2737.8 2768.2 2798.6 2829.1 2859.5 2689.9 I 2920.3 2950.7 2961.2 I 3011.6 3042.0 3072.4 I 3102.8 31 33.3 3163.7 3194.1 3224.5 3254.9 3285.4 3315.8 3346.2 3376.6 3407.0 3437.5 3467.9 3498.3 3528.7
~
35 9.
3620.0 3650.4 3680.8 3711.2 3741.7 3772.1 3802.5 3832.9 3863.3 3893.8 3924.2 3954.6 3985.0 4015.4 4045.9 4076.3 4106.7 4137.1 4167.5 4198.0 4228.4 4258.8 4289.2 4319.6 4350.1 4380.5 4410.9 4441.3 4471.7 4502.2 4532.6 4563.0 Notes According to remediation duration calculations 1206 South, uranium and nitrate remediation goals (NRC and State Criteria) are both met at 126.3 Months According to remediation duration calculations for WU-PBA, uranium and nitrate remediation goals (NRC and State Criteria) are both met at 204.9 Months According to remediation duratio n calculations WAA U>DCGL, uranium and nitrate remediation goals (NRC and State Criteria) are both met at 167.6 Months According to remediation duratio n calculations WAA West, uranium and nitrate remediation goals (NRC and State Criteria) are both met at 404.2 Months According to remediation duration calculations WAA East, uranium and nitrate remediation goals (NRC and State Criteria) are both met at 591.2 Months
Western Area Combined Influent - Nitrate WAA U>DCGL (GE-WAA-WEST (GE-WAA-WU-1348 (GETR-WU-WU-PBA (GE-WU~1)
WAA-01 through GE-Area WAA~41
- 05)
- 01)
C; (ua/Ll 61.73 35.76 10.22 11.57 Cm.,
(ug/Ll 61.73 35.76 10.22 11.57 Flow Rate laPml 5
99 10 4
R 22.7 4.6 4.6 11.9 PV
!liters) 6,548,662 118,295,089 67,593,844 1,749,984 Q
(liters/davl 27,255 539,648 54,510 21,804 Time Required for Initial Cone, to Reach Max. Level lmonthsl 0
0 0
0 Cumulative Time (Months)
WU-PBA WAAU>DCGL WAA-WEST WU-1348 0
61.730000 35.761919 10.220000 11.570000 1
61.386971 34.703700 10.165877 11.206095 2
61.045849 33.676794 10.112040 10.853635 3
60.706622 32.680274 10.058489 10.512262 4
60.369280 31.713243 10.005221 10.181625 5
60.033812 30.774827 9.952235 9.861388 6
59.700209 29.864178 9.899530 9.551223 7
59.368460 28.980477 9.847104 9.250813 8
59.038554 28.122925 9.794955 8.959852 9
58.710481 27.290749 9.743083 8.678043 10 58.384232 26.483197 9.691485 8.405097 11 58.059795 25.699541 9.640161 8.140736 12 57.737162 24.939074 9.589108 7.884689 13 57.416321 24.201110 9.538326 7.636696 14 57.097263 23.484983 9.487813 7.396503 15 56.779978 22.790046 9.437567 7.163865 16 56.464456 22.115673 9.387588 6.938544 17 56.150687 21.461255 9.337873 6.720309 18 55.838662 20.826202 9.288421 6.508939 19 55.528371 20.209941 9.239231 6.304217 20 55.219805 19.611915 9.190302 6.105934 21 54.912952 19.031585 9.141632 5.913887 22 54.607805 18.468427 9.093219 5.727880 23 54.304354 17.921934 9.045063 5.547724 24 54.002589 17.391612 8.997162 5.373235 25 53.702501 16.876982 8.949515 5.204233 26 53.404080 16.377581 8.902120 5.040547 27 53.107318 15.892957 8.854976 4.882010 28 52.812205 15.422674 8.808082 4.728458 29 52.518732 14.966306 8.761436 4.579737 30 52.226889 14.523443 8.715037 4.435692 31 51.936669 14.093685 8.668883 4.296179 32 51.64806 1 13.676643 8.622975 4.161054 33 51.361 056 13.271942 8.577309 4.030178 34 51.075647 12.879216 8.531885 3.903419 35 50.791824 12.498111 8.486702 3.780647 36 50.509578 12.128284 8.441758 3.661736 37 50.228900 11.769400 8.397052 3.546565 38 49.949782 11.4211 35 8.352583 3.435017 39 49.672215 11.083176 8.308349 3.326977 40 49.396 190 10.755217 8.264349 3.222336 41 49.121699 10.436963 8.220583 3.120985 42 48.848734 10.128126 8.177048 3.022823 43 48.577285 9.828428 8.133744 2.927747 44 48.307345 9.537598 8.090669 2.835662 45 48.038905 9.255374 8.047822 2.746474 46 47.771957 8.981501 8.005203 2.660090 47 47.506492 8.715733 7.962809 2.576424 48 47.242502 8.457828 7.920639 2.495389 49 46.979979 8.207555 7.878693 2.416903 50 46.718915 7.964688 7.836969 2.340885 51 46.459302 7.729008 7.795465 2.267259 52 46.201131 7.500301 7.754182 2.195948 53 45.944395 7.278362 7.713117 2.126880 54 45.689085 7.062990 7.672270 2.059984 55 45.435195 6.853992 7.631639 1.995193 56 45.182715 6.651177 7.591223 1.932439 57 44.931638 6.454365 7.551022 1.871659 58 44.681957 6.263375 7.511033 1.812791 59 44.433663 6.078038 7.471256 1.755774 60 44.186748 5.898185 7.431689 1.700550 61 43.941206 5.723653 7.392332 1.647064 62 43.697028 5.554287 7.353184 1.595260 63 43.454207 5.389931 7.314243 1.545085 64 43.212736 5.230440 7.275508 1.496488 65 42.972606 5.075667 7.236978 1.449420 66 42.733810 4.925475 7.198653 1.403832 67 42.496342 4.779727 7.160530 1.359678 68 42.260193 4.638292 7.122609 1.316913 69 42.025357 4.501041 7.084889 1.275493 70 41.791825 4.367852 7.047369 1.235375 71 41.559591 4.238605 7.010047 1.196520 72 41.328648 4.113182 6.972923 1.158886 73 41.098988 3.991470 6.935996 1.122436 74 40.870604 3.873359 6.899264 1.087133 75 40.643489 3.758744 6.862727 1.052940 76 40.417636 3.647520 6.826383 1.019822 77 40.193039 3.539588 6.790232 0.987746 78 39.969689 3.434849 6.754272 0.956679 79 39.747581 3.333209 6.718503 0.926589 WAA-EAST (GE-WAA-WAA-BLUFF (GE-WAA-1206-NORTH (GETR-06 through GE-WAA-14 & GE-WAA-15) 131 WU~2) 72.23 114.10 38.64 72.23 312.75 38.64 20 104 8
4.6 4.6 10.9 133,552,129 192,892,116 85,334 109,020 566,903 43,608 0
0 0
WAA-EAST WAA-BLUFF 1206-NORTH 72.225000 114.100192 38.640000 71.837838 111.913425 9.249148 71.452751 109.768568 2.213942 71.069729 107.664818 0.529945 70.688760 105.601386 0.126851 70.309833 103.577501 0.030364 69.932937 101.592405 0.007268 69.558062 99.645353 0.001740 69.185196 97.735618 0.000416 68.814328 95.862483 0.000100 68.445449 94.025247 0.000024 68.078548 92.223223 0.000006 67.713613 90.455735 0.000001 67.350634 312.750000 0.000000 66.989601 306.756045 0.000000 66.630503 300.876965 0.000000 66.273330 295.110560 0.000000 65,918072 289.454670 0.000000 65.564719 283.907177 0.000000 65.213259 278.466004 0.000000 64.863683 273.129112 0.000000 64.515982 267.894504 0.000000 64.170144 262.760219 0.000000 63.826160 257.724334 0.000000 63.484020 252.784963 0.000000 63.143714 247.940257 0.000000 62.805232 243.188401 0.000000 62.468565 238.527617 0.000000 62.133702 233.956157 0.000000 61.800634 229.472311 0.000000 61.469352 225.074400 0.000000 61.1 39846 220.760776 0.000000 60.812106 216.529824 0.000000 60.486122 212.379959 0.000000 60.1 61887 208.309628 0.000000 59.839389 204.317306 0.000000 59.518620 200.401499 0.000000 59.1 99570 196.560739 0.000000 58.882231 192.793588 0.000000 58.566593 189.098636 0.000000 58.252647 185.474500 0.000000 57.940384 181.919820 0.000000 57.629794 178.433268 0.000000 57.320870 175.013536 0.000000 57.013601 171.659345 0.000000 56.707980 168.369438 0.000000 56.403997 165.142583 0.000000 56.1 01643 161.977571 0.000000 55.800911 158.873219 0.000000 55.501790 155.828362 0.000000 55.204273 152.841860 0.000000 54.908350 149.912596 0.000000 54.614014 147.039473 0.000000 54.321256 144.221413 0.000000 54.030067 141.457363 0.000000 53.740439 138.746287 0.000000 53.452363 136.087169 0.000000 53.165832 133.479014 0.000000 52.880836 130.920845 0.000000 52.597369 128.411705 0.000000 52.315421 125.950653 0.000000 52.034984 123.536768 0.000000 51.756050 121.169145 0.000000 51.478612 118.846899 0.000000 51.202661 116.569160 0.000000 50.928189 114.335074 0.000000 50.655189 112.143805 0.000000 50.383652 109.994532 0.000000 50.113570 107.886451 0.000000 49.844936 105.818772 0.000000 49.577743 103.790721 0.000000 49.311981 101.801538 0.000000 49.047644 99.850479 0.000000 48.784725 97.936812 0.000000 48.523214 96.059821 0.000000 48.263106 94.218803 0.000000 48.004391 92.413069 0.000000 47.747064 90.641943 0.000000 47.491116 88.904760 0.000000 47.236540 87.200872 0.000000 C -c
(-Q/(PV*R))t c oe I I Combined WEIGHTED Influent Flow AVERAGE Rate Months 70.47 250.00 0
68.16 250.00 1
66.59 250.00 2
65.22 250.00 3
63.92 250.00 4
62.66 250.00 5
61.43 250.00 6
60.22 250.00 7
59.05 250.00 8
57.89 250.00 9
56.77 250.00 10 55.67 242.00 11 54.59 242.00 12 146.73 242.00 13 143.91 242.00 14 141.15 242.00 15 138.44 242.00 16 135.79 242.00 17 133.19 242.00 18 130.64 242.00 19 128.15 242.00 20 125.70 242.00 21 123.30 242.00 22 120.95 242.00 23 118.65 242.00 24 116.39 242.00 25 114.18 242.00 26 112.01 242.00 27 109.89 242.00 28 107.81 242.00 29 105.76 242.00 30 103.76 242.00 31 101.80 242.00 32 99.88 242.00 33 98.00 242.00 34 96.15 242.00 35 94.34 242.00 36 92.56 242.00 37 90.82 242.00 38 89.12 242.00 39 87.45 242.00 40 85.81 242.00 41 84.20 242.00 42 82.63 242.00 43 81.08 242.00 44 79.57 242.00 45 78.09 242.00 46 76.63 242.00 47 75.21 242.00 48 73.81 242.00 49 72.44 242.00 50 71.09 242.00 51 69.78 242.00 52 68.49 242.00 53 67.22 242.00 54 65.98 242.00 55 64 76 242.00 56 63.57 242.00 57 62.40 242.00 58 61.25 242.00 59 60.12 242.00 60 59.02 242.00 61 57.94 242.00 62 56.88 242.00 63 55.84 242.00 --64 ___
54.82 242.00 65 53.82 242.00 66 52.84 242.00 67 51.88 242.00 68 50.93 242.00 69 50.01 242.00 70 49.10 242.00 71 48.21 242.00 72 47.34 242.00 73 46.49 242.00 74 45.65 242.00 75 44.83 242.00 76 44.02 242.00 77 43.23 242.00 78 42.45 242.00 79 1 of 2 Davs 0.0 30.4 60.8 91.3 121.7 152.1 182.5 212.9 243.4 273.8 304.2 334.6 365.0 395.5 425.9 456.3 486.7 517.1 547.6 578.0 608.4 638.8 669.2 699.7 730.1 760.5 790.9 821.3 851.8 882.2 912.6 943.0 973.4 1003.9 1034.3 1064.7 1095.1 1125.5 1156.0 1186.4 1216.8 1247.2 1277.6 1308, 1 1338.5 1368,9 1399.3 1429.7 1460.2 1490.6 1521.0 1551.4 1581.8 1612.3 1642.7 1673.1 1703.5 1733.9 1764.4 1794.8 1825.2 1855.6 1886.0 1916.5 1946-9 1977.3 2007.7 2038.1 2068.6 2099.0 2129.4 2159.8 2190.2 2220.7 2251.1 2281.5 2311.9 2342.3 2372.8 2403.2 Notes According to remediation duration calculations fo r 1206 North, uranium and nitrate remediation goals (NRC and State Criteria) are both met at 9.3 months; however 1206 North groundwater extraction will continue until water injection in WU-BA3 is discontinued in Month 83.
According to remediation duration calculations for UP1 and UP2, uranium and nitrate remediation goals (NRC and State Criteria) are both met at 57 Months.
However, groundwater extraction will continue in the WAA "BLUFF'" Area to maintain the minimum treatment system flow rate.
Western Area Combined Influent - Nitrate WAA U>DCGL (GE-WAA-WEST (GE-WAA-WU-PBA (GE-WU-01)
WAA-01 through GE-Area WAA-041
- 05) c, (U!I/Ll 61.73 35.76 10.22 Cm.,
rua/Ll 61.73 35.76 10.22 Flow Rate (gpm) 5 99 10 R
22.7 4.6 4.6 PV (liters) 6,548,662 118,295,089 67,593,844 Q
(liters/day) 27,255 539,648 54,510 Time Required for Initial Cone. to Reach Max. Level (months) 0 0
0 Cumulative Time (Months)
WU-PBA WAAU>DCGL WAA-WEST 80 39.526707 3.234577 6.682923 81 39.307060 3.138864 6.647531 82 39.088634 3.045983 6.612327 83 38.871421 2.955850 6.577309 84 38.655416 2.868385 6.542477 85 38.440611 2.783507 6.507829 86 38.226999 2.701141 6.473365 87 38.014575 2.6212 13 6.439083 88 37.803331 2.543649 6.404983 89 37.593261 2.468381 6.371063 90 37.384358 2.395340 6.337323 91 37.176616 2.324460 6.303762 92 36.970028 2.255678 6.270379 93 36.764589 2.188931 6.237172 94 36.560291 2.124159 6.204141 95 36.357128 2.061303 6.171285 96 36.155094 2.000308 6.138603 97 35.954183 1.941118 6.106094 98 35.754389 1.883679 6.073757 99 35.555705 1.827939 6.041592 100 35.358124 1.773849 6.009596 101 35.161642 1.721360 5.977771 102 34.966252 1.670424 5.946114 103 34.771947 1.620995 5.914624 104 34.578722 1.573028 5.883301 105 34.386571 1.526481 5.852144 106 34.195487 1.481312 5.821153 107 34.005465 1.437479 5.790325 108 33.816500 1.394943 5.759660 109 33.628584 1.353666 5.729158 110 33.441713 1.313610 5.698818 111 33.255880 1.274739 5.668638 112 33,071079 1.237019 5.638618 113 32.887306 1.200414 5.608757 114 32.704554 1.164893 5.579054 115 32.522817 1.130423 5.549508 116 32.342091 1.096973 5.520119 117 32.162368 1.064513 5.490885 118 31.983644 1.033013 5.461806 119 31.805914 1.002446 5.432882 120 31.629171 0.972783 5.404110 121 31.453410 0.943998 5.375491 122 31.278626 0.916064 5.347023 123 31.104813 0,888957 5.318707 124 30.931966 0.862652 5.290540 125 30.760079 0.837126 5.262522 126 30.589148 0.812355 5.234653 127 30.419167 0.788317 5.206931 128 30.250130 0.764990 5.179356 129 30.082032 0.742353 5.151927 130 29.914869 0.720386 5.124643 131 29.748634 0.699070 5.097504 132 29.583323 0.678384 5.070509 133 29.418931 0.658310 5.043656 134 29.255452 0.638830 5.016946 135 29.092882 0.619927 4.990377 136 28.931215 0.601583 4.963949 137 28.770447 0.583781 4.937661 138 28.610572 0,566507 4.911512 139 28.451585 0.549744 4.885501 140 28.293482 0.533476 4.859629 141 28.136257 0.517690 4.833893 142 27.979906 0.502372 4.808293 143 27.824424 0.487506 4.782830 144 27.669806 0.473080 4.757501 145 27.516047 0.459082 4.732306 146 27.363142 0.445497 4.707244 147 27.211088 0.432315 4.682316 148 27.059878 0.419522 4.657519 149 26.909508 0.407108 4.632854 150 26.759974 0.395061 4.608319 WU-1348 (GETR-WU-WAA-EAST (GE-WAA-WAA-BLUFF (GE-WAA-06 through GE-WAA-
- 01) 14 & GE-WAA-15) 131 11.57 72.23 114.10 11.57 72.23 312.75 4
20 104 11.9 4.6 4.6 1,749,984 133,552,129 192,892,116 21,804 109,020 566,903 0
0 0
WU-1348 WAA-EAST WAA-BLUFF 0.897446 46.983328 85.529639 0.869219 46.731474 83.890435 0.841880 46.480970 82.282648 0.815401 46.231809 80.705674 0.789754 45.983983 79.158924 0.764915 45.737486 77.641817 0.740856 45.492311 76.153786 0.717554 45.248449 74.694274 0.694985 45.005895 73.262734 0.673126 44.764641 71.858630 0.651955 44.524680 70.481436 0.631449 44.286005 69.130636 0.611589 44.048610 67.805725 0.592353 43.812488 66.506207 0.573722 43.577631 65.231593 0.555677 43.344033 63.981409 0,538199 43.111688 62.755184 0.521272 42.880587 61.552461 0.504876 42.650726 60.372788 0.488997 42.422097 59.215724 0.473617 42.194693 58.080835 0.458720 41.968509 56.967697 0.444292 41.743537 55.875893 0.430318 41.519770 54.805013 0.416784 41.297204 53.754657 0.403675 41.075830 52.724431 0.390978 40.855643 51.713951 0.378681 40.636637 50.722836 0.366771 40.418804 49.750716 0.355235 40.202139 48.797228 0.344062 39.986635 47.862013 0.333240 39.772287 46.944722 0.322759 39.559088 46.045011 0.312607 39.347031 45.162543 0.302775 39.136112 44.296989 0.293252 38.926323 43.448022 0.284028 38.717658 42.615327 0.275095 38.510112 41.798590 0.266443 38.303679 40.997507 0.258062 38.098352 40.211776 0.249946 37.894126 39.441104 0.242084 37.690994 38.685203 0.234470 37.488952 37.943788 0.227095 37.287992 37.216583 0.219953 37.088110 36,503315 0.213035 36.889299 35.803717 0.206334 36.691554 35.117527 0.199844 36.494869 34.444489 36.299238 33.784349 36.104656 33.136861 35.911118 32.501782 35.718616 31.878875 35.527146 31.267906 35.336703 30.668646 35.147281 30.080872 34.958874 29.504362 34.771477 28.938901 34.585084 28.384278 34.399691 27.840284 34.215292 27.306716 34.031881 26.783374 33.849453 26.270062 33.668003 25.766587 33.487525 25.272762 33.308016 24.788402 33.129468 24.313324 32.951878 23.847351 32.775239 23.390309 32.599547 22.942026 32.424798 22.502335 32.250985 22.071070 1206-NDRTH (GETR-WU-02) 38.64 38.6' II 10.9 85,334 43,608 C -c
(-Q/(PV*R))t c oe 0
I I Combined 1206-NORTH WEIGHTED Influent Flow AVERAGE Rate Months 0.000000 41.69 242.00 80 0.000000 40.95 242.00 81 0,000000 40.21 242.00 82 0.000000 39.50 242.00 83 40.07 242.00 84 39.36 242.00 85 311.66 242.00 86 37.98 242.00 87 37.30 242.00 88 36.64 242.00 89 35.99 242.00 90 35.36 242.00 91 34.74 242.00 92 34.12 242.00 93 33.53 242.00 94 32.94 242.00 95 32.36 242.00 96 31.79 242.00 97 31,24 242.00 98 30.69 242.00 99 30.16 242.00 100 29.64 242.00 101 29.12 242.00 102 28.62 242.00 103 28.12 242.00 104 27.64 242.00 105 27.16 242.00 106 26.69 242.00 107 26.23 242.00 108 25.78 242.00 109 25.34 242.00 110 24.91 242.00 111 24.48 242.00 112 24.07 242.00 113 23.66 242.00 114 23.26 242.00 115 22.86 242.00 116 22.48 242.00 117 22.10 242.00 118 21.73 242.00 119 21.36 242.00 120 21.00 242.00 121 20.65 242.00 122 20.31 242.00 123 19.97 242.00 124 19.63 242.00 125 1Q ~1
?A'J nn 126 18.99 242.00 127 18.98 238.00 128 18.67 238.00 129 18.36 238.00 130 18.06 238.00 131 17.77 238.00 132 17.47 238.00 133 17.19 238.00 134 16.91 238.00 135 16.63 238.00 136 16.36 238.00 137 16.10 238.00 138 15.84 238.00 139 15.58 238.00 140 15.33 238,00 141 15.09 238.00 142 14.85 238.00 143 14.61 238.00 144 14.38 238.00 145 14.15 238.00 146 13.92 238.00 147 13.70 238.00 148 13.49 238.00 149 13.27 238.00 150 2 of2 Days 2433.6 2464.0 2494.4 2524.9 2555.3 2585.7 2616.1 2646.5 2677.0 2707.4 2737.8 2768.2 2798.6 2829.1 2859.5 2889.9 2920.3 2950.7 2981.2 3011.6 3042.0 3072.4 3102.8 3133.3 3163.7 3194.1 3224.5 3254.9 3285.4 3315.8 3346.2 3376.6 3407.0 3437.5 3467.9 3498.3 3528.7 3559.1 3589T 3620.0 3650.4 3680.8 3711.2 3741.7 3772.1 3802.5 3832.9 3863.3 3893.8 3924.2 3954.6 3985.0 4015.4 4045.9 4076.3 4106.7 4137.1 4167.5 4198.0 4228.4 4258.8 4289.2 4319.6 4350.1 4380.5 4410.9 4441.3 4471.7 4502.2 4532.6 4563.0 Notes According to remediation duration calculations 1206 South, uranium and nitrate remediation goals (NRC and State Criteria) are both met at 126.3 Months According to remediation duration calculations for WU-PBA, uranium and nitrate remediation goals (NRC and State Criteria) are both met at 204.9 Months According to remediation duration calculations WAA U>DCGL, uranium and nitrate remediation goals (NRC and State Criteria) are both met at 167.6 Months According to remediation duration calculations WAA West, uranium and nitrate remediation goals (NRC and State Criteria) are both met at 404.2 Months According to remediation duration calculations WAA East, uranium and nitrate remediation goals (NRC and State Criteria) are both met at 591.2 Months 2.0a -Treatment System Effluent Criteria: BA1 and WA
Water Treatment Design Basis Cimarron Environmental Response Trust Constituent Source Groundwater Contaminant Limitation Rationale Treatment Objectives
,<:, "'":i,u
- ,;:a'
"'.,., ~¢:i "'~f. ~
- \\'!
- ! ',.....
-,'[;',
,!",,' 1s.:~ *:~ :.tl~.'.!<
,p ~l,
~
limitation Basis Injection Injection Injection Injection Injection Injection OPDES Permit Concentration Limits Criterion Criterion Criterion Criterion Criterion Criterion EPA DWEL 3
EPA DWEL' Cmea/
Sulfate Fe/Mn Adenosine Het erotrophic Anaerobic Reducing Reducing Tri phosphate Uranium1 Nitrate Fluoride pH Plate Count Growth Bacteria Bacteria (ATP)
LSI Molybdenum Boron Selenium Groundwater Extraction Process percent presence/
percent Stream
µg/L mg/L mg/ L S.U.
(colonies/ml) population '
absence population3 (colonies/ml) mg/L mg/L
µg/L BAl (Outfall 002) 54,77 530
-or-55 54 6,5
- 9,0 5300 515%
Absent Absent 5100,000
-0,5 - +05 50,20 57 WATF ND (1.0)
(Outfall 001) 58.97 Constituent Source
,i*. -
~
_,,;~
- <-*,:*,,;;,_~f' '/f:
.. r\\1,,.._,;,,, -.-
Limitation Rationale Treatment Additives Limitation Basis OPDES Permit Requirements General Quality Groundwater Extraction Process Stream BAl There shall be no discharge of a visible sheen of oil or globules of oil or grease on or in the water. Oil and grease shall not be present in (Outfall 002) quantities that adhere to stream banks and coat bottoms of watercourses. Surface waters of the State shall be maintained free from oil and grease and taste and odors. There shall be no discharge of floating solids or visible foam in other than trace amounts. The discharge shall not WATF contain chemical, physical, or biological substances in concentrations that are irritating to skin or sense organs or are toxic or cause illness upon (Outfall 001) ingestion by huma n beings.
Definitions:
Applicable Effluent Standards:
BAl
- Burial Area 1
- 1. Concentration limits specified in the OPDES permit CaC03 - calcium carbonate Cmean - mean pollutant effluent concentration calculated in OP DES permit.
Cone. - concentration
- 2. Injection Criterion 3, EPA DWEL
- 4. Cmcan presented in the OPDES permit Cm,ao Lead
µg/l 523,6 515,5 DWEL - Drinking water equivalent level EPA - Environmental Protection Agency Fe2- - ferrous iron
- 5. Average influent concentrations for WATF and BAl groundwater process streams 6, Water quality requirement specified in t he OPDES permit Rationale for Establishing Effluent Criteria:
Cm,ao Mercury
µg/l
,;o,2 LSI - Langelier Saturation Index mg/ L - milligrams pe r liter L Concentration limits specified in tne OPDES permit apply for uranium, nitrate, fluoride, and pH,
- 2. The injection criterion applies if:
Cm,.,
µg/l
,;17,3 Treatment Effluent Criteria Treatment Additives
~
Water Quality Objectives (for compliance and injection purposes)
Influent Cone,/
Injection Influent Injection Influent Criterion/
Influent Injection
- Cone, Cm,.,
Criterion Cone Cm,.,
Influent Cone, cm.,o
- Cone, Criterion Ortho-Sulfate Copper Manganese Chloridess Nickel Sodiums Zinc TDC Phosphate mg/L mg/l mg/L mg/l
µg/l mg/l
µg/L mg/L mg/L
- 251 50,03 50,10 580 5400 53,95 5100 514,3 51
- 240 50,01 50,54 582,6 54,34 56,31 Treatment Effluent Criteria Water Quality Objectives (for compliance and injection purposes)
Groundwater Constituents Injection Influent Injection Injection Cm.,,
Criterion Cm,ao Cm,a, Cone.
Influent Cone.
Criterion Criterion Cm,.,
Total Bicarbonate Cyanide TSS Ammonia Silver Alkalinity Alkalinity Potassium Magnesium Chromium mg/l mg/L
µg/l mg/l mg/L
µg/l (as CaC0 3)
(as caco,)
mg/L mg/l
µg/L 50,20 5463 5462 536,4
,;13,3
,;45
,;1,75 ss Sl80 522,3 5325 5294 5102 OPOES
- Oklahoma Pollutant Discharge Elimination System Si02 - silica dioxide
- a. Influent concentration data are not available but an injection criterion exists and the water t reatment process may affect the constituent concentration, characteristic, etc. (e.g., heterotrophic plate count, LSI, etc.)
s,u, - Standard Units
- b. If the injection criterion is less stringent than the corresponding influent concentration
~J Influent Cone./
Injection Influent Cone, Criterion TDS Total Iron mg/L mg/L 5959 51,53 51200 51
,~-* J Injection Criterion/
Influent Cone, Cm.,,
,;3340 5182 TDS
µg/L - micrograms per liter
- 3. EPA OWE ls apply if the water treatment process may affect the constituent concentration, influent concentration data are not availab le, the constituent is not referenced in the OPDES permit, and no other standard [i.e., USEPA MCL) exits (e.g., molybdenum, boron).
USEPA - United States Environmental Prot ection Agency WATF - Western Area Treatment Facility Notes:
- 4. The [mean presented in the OP DES permit applies if:
- a. Influent concentration data are not available but the water treatment process may affect the constituent concentration, characteristic, etc. of a regulated constituent (e.g., selenium).
- b. Influent concentration data are not available but an injection criterion exists and the water treatment process may affect the constituent concent ration, characteristic, etc. (e.g., copper).
- 5. The influent concentration applies if:
- a. An injection criterion exists, the water treatment process may affect the constituent concentration, characteristic, etc., and the influent concentration is more stringent than other standards (e.g., Cmcan) [e.g., sulfate).
- b. An injection criterion exists but the injection criterion is more stringent than the influent concentration (e.g., manganese - WATF process stream).
6.Water quality requirement specified in the OPDES permit applies if there are no other applicable criteria or standards \\e.g., total halogens) 1The maximum treatment effluent uranium concentration for re-injection or OPDES discharge is 30 µg/ L. Maximum concentration prior to nitrate removal is non-detect (1.0 µ.g/L detection limit).
2Anaerobic growth analysis is conducted by analyzing the population of sulfate reducing bacteria [SRB), as a percentage of the total microbial population, because SRB are the most probable, prolific and observable anaerobes in groundwater.
3EPA DWEL used for constituents for which groundwater data and Cmean levels are not available.
4Cmcan values presented in OP DES discharge permit used for constituents for which groundwater data are not available.
5Sodium and chloride concentrations in groundwater extracted from wells located near the Cimarron River may be significantly higher than t he concentrations reported for site monitoring wells.
~
,,,,.,, ~,~".:~J' Influent Injection Cone.
Criterion Dissolved Iron Silica mg/L mg/L (as Fe2' )
(as Si02) 50.56
<30 50.05
~,r',,:~-
µg/L
µg/L S59.7 S0,28 t
f
~$ ~-..c!
~
,,.a,*~
~
Injection Criterion OPDES Permit Requirement Tannin/
Lignln Temperature mg/L
<5 There can be no addition of heat from artificial sources to the water discharged at Outfalls 001 & 002 ICr,,;
~'.'.i:
t:,:*,v~~
OPDES Permit Cm,,,
cmcan Cm,.,
Requirement Bis 1,4, Dimethyl (2*Ethylhexyl)
Dichloroben2ene Phthalate Total Halogens
µg/L
µg/L
µg/L mg/L
,;3,29 S0,19 S881 SO,l Revision D 9/26118 2.0b-Treatment System Influent Characteristics: BA1 and WA
Water Treatment Design Basis Cimmaron Environmental Response Trust Groundwater Extraction Process Designated Stream Remediation Area "U>DCGL" AREA A BAl "U>DCGL" AREA B "U<DCGL" AREA C WAA U>DCGL WAA-WE5T
~
WAA "U<DCGL" EAST WATF WU-1206 "SOUTH" WU-PBA WAA"BLUFF" Definitions:
BAl - Burial Area 1
- c -degrees Celcius WU-1206 "NORTH" DCGL - Derived Concentration Goal Level gpm - gallons per minute LSI - Langelier Saturation Index mg/l
- milligrams per liter PBA - Process Building Area RSI - Rymer Stability Index s.u. - Standard Units TDS-Total Dissolved Solids TOC - Total Organic Carbon U - Uranium Concentration
µg/l
- micrograms per liter
µm - micrometer UPl - Uranium Pond 111 Area UP2 - Uranium Pond #2 Area WAA - Western Alluvial Area WU - Western Upland Area Flow Rates Nominal Range gpm gpm 14 10
- 26 66 30 - 90 20 10-40 99 60 -120 10 10 -30 20 20 - 60 4
1 - 5 5
1-5 104 90
- 210 8
3 - 15
(Maximum)
(Initial)
µg/L
µg/ l mg/l 1720 1720 2.35 1139 1139 0.27 34.7 34.7 0.06 147 147 35.8 58.6 58.6 10.2 51.1 51.1 72.2 62.0 62.0 11.57 29.0 29.0 61.7 14.27 22.29 114 304 304 38.6
- Nitrogen, Nitrate-Nitrite Fluoride Fluoride Bicarbonate Carbonate Hydroxide Phenolphthalein (Ma1Cimum)
(Initial)
(Maximum) pH LSI' RSI' Alkalinity Alkalinity Alkalinity Alkalinity mg/L m,/L m*/L s.u.
mg/l mg/L mg/L mg/L 2.35 0.72 0.72 7.12 0.00 7.10 439.32 0.94
~
1.00 0.27 0.49 0.49 7.09 D.16 6.76 460.92 1.53 1.00
~
0.06 0.43 0.43 7.24 0.89 5.93 480.00 35.8 2.27 2.3 6.96
-0.06 7.07 343.13 0.84 l.00 1.00 10.2 0.45 0.5 7.32 0.10 7.01 359.33 72.2 0.45 0.4 7.25 11.57 1.00 1.00 7.40
-0.44 8.28 277.00 61.7 0.32 0.3 6.93 312.75 2.19 11.93 7.06
-0.43 7.55 290.00 38.6 7.03 7.0 7.0S 0.25 6.55 579.50 1.26 1.00 1.00
- The averages presented in this summary are not necessarily representative of influent characteristics at all times. The actual characteristics of each process stream may vary based on the groundwater eictraction and injection components in operation at any given time
- With the exception of uranium, nitrate, and flouride concentrations, the data used to prepare this summary is limited to the most recent groundwater analytical results available for each sample location and paramete r, as specified in the MS Excel'-' workbook file entitled 2015-2-28 Comprehensive Analytical Data.xls1t.
- Influent characteristics for each process stream were estimated bv averaging concentrations reported for monitoring wells considered representative of each groundwater remediation area and extraction stream.
1 Total Alkalinity, Calcium and TOS concentrations used for LSI and RSI calcu lations at each location were taken from the same sampling event which occurred in either 2004, 200S, or 2007, depending on the location. Temperature and pH values used for LSI and RSI calculations were taken from the 2015 sampling event at each location 2Sodium and chloride concentrations in groundwater extracted from wells located near the Cimarron River may be significantly higher than the concentrations reported for site monitoring wells.
Influent Characteristics1 Total Alkalinity Aluminum Calcium Chlorides' Ferro us Iron Iron Magnesium Manganese mg/L
µg/L
µg/L mg/L mg/L
µg/L
µg/L
µg/l 436.46 80.59 108831.03 20.43 0.40 545.93 49279.31 633.23 462.96 62.57 163440.00 73.38 0.75 763.78 61892.00 436.98 481.00 26.70 186000.00 149.00 0.05 4740.00 64300.00 807.00 343.67 105.65 194200.00 99.37 0.05 107.53 77986.67 86.78 360.67 135666.67 94.40 0.05 346.50 38433.33 81.83 324.00 61.60 100.00 28.60 278.00 26.70 24700.00 3.72 0.05 100.00 9130.00 18.90 8.28 28533 182500.00 12.78 0.05 100.00 65550.00 9.04 16.55 580.50 156500.00 17.85 204.50 57300.00 160.25 Drtho-Phosphate Potassium Silica Sodium2 Sulfate mg/L
µg/L
µg/L
µg/L mg/L 0.20 605.21 24072.41 30758.62 50.54 0.13 2133.20 26132.00 91940.00 -
266.42 1930.00 26000.00 58400.00 338.00 0.20 3346.67 22266.67 115640.00 369.13 2930.00 17300.00 96200.00 169.23 270.00 1890.00 14700.00 15300.00 20.20 30.40 3580.00 21050.00 52250-00 148.40 0.20 2439.00 84050.00 72.80 TDS TOC Phosphorous mg/L mg/L mg/l 606.61 3.07 985.04
- 3. 79 1120.00 5.13 1235.33 7.19 944.00 4.D9 206.00 654.00 1281.50 5.91 B59.50 Methane mg/L O.o3 0.03 Temperature
- c 15.19 15.29 Revision D 9/26/18
~
13.79 14.85 14.97 16.90 19.47 1339 16.10 3.0 - Treated Water Injection Criteria
Water Treatment Design Basis Cimarron Environmental Response Trust limitation Basis Parameter Units limit Definitions:
BAl - Burial Area 1 CaC03 - calcium carbonate LSI - Langelier Saturation Index mg/L - milligrams per liter ml -milliliter mV - millivolt HOL Evaluat ion Nitrate mg/L ss ORP - oxidation-reduction potential Si02 - silica dioxide s.u. - standard units TDS - total dissolved solids TOC - total organic carbon TSS - total suspended solids
µg/l - micrograms per liter
µm - micrometer uS/cm - microSiemens per centimeter WATF - Western Area Treatment Facility WSE - Water Systems Engineering Inc.
..,c Evaluation Ch lorides mg/L SlOO vv,c Evaluation Ortho-Phosphate mg/L Sl VV,C vv,c VV>t
,-JL
,oc
,,,c Evaluation Evaluation Evaluation Evaluation Evaluation Evaluation Total Bicarbonate Calcium3 LSI TDC Alkalinity Alkalinity TDS mg/L mg/L mg/L mg/L (as caco, )
(as caco,)
mg/l Sl80
-0.5 - +0.5 Sl Sl80 S180 S4'1D BOLD - treated effluent is expected to exceed injection criterion. Pretreatment will be required prior to injection unless otherwise noted.
Injection Criteria WJL VVJL VVJL VVOL VVOL
,.,c VVOL Evaluation Evaluation Evaluation Evaluation Evaluation Evaluation Evaluation NDn-Total Carbonate Carbonate Conductivity ORP 1
Hardness Hardness Hardness Sodium Magnesium mg/L mg/L mg/L
µS/cm mV (as CaC03)
(as CaC03)
[as CaCO,)
mg/L mg/L
- 5750 150 - 220 Sl80 Sl80 sso sso Sl80 BOLD
- treated effluent ls expected to exceed injection criterion; however pretreatment will not be required initially. In-process monitoring results will be evaluated to assess the need for future pretreatment.
Notes:
- An underground injection control (UIC) permit will not be required for treated water injection; therefore there will be no permit requirements for the injectate.
- Results of the WSE evaluation were presented in a letter report entitled Injection Well Water Quality Criteria (dated 9/ 25/18)
- The criteria presented in this table apply only to treatment system effluents utilized for aquifer injection.
10RP is dependent on natural wat er chemistry and any induced subsurface treatment technologies employed.
2Treated effluent is expected to exceed injection criterion for BAl only.
3Treated effluent is elepected to exceed injection criterion for WATF only.
,.,c
,.,c VVJL VVJL
'J L
-,JL W>t VV>t Evaluation Evaluation Evaluation Evaluation Evaluation Evaluation Evaluation Evaluation Dissolved Tannin/
Potassium Iron Total lron2 Copper Manganese Sulfate' Silica Lignin mg/L mg/ L mg/l (as Fe2')
mg/ L mg/L mg/L mg/l (as Si02) mg/L ss so.oz Sl S0.04 S0.10 SlSO S30 S5 VVOt WSE Evaluation Evaluation Heterotrophic Anaerobic pH TSS TSS Plate Count Growth percent S.U.
µm mg/L
[colonies/ml) population 6.5 - 9.0 SlO S45 S300 515%
VV,t VV>t Evaluation Evaluation
~uirate
<e/Mn Reducing Reducing Bacteria Bacteria presence/
presence/
absence absence Absent Absent W>t Evaluation Allenosme Tri phosphate (ATP)
(colonies/m l)
Sl00,000 Revision D 9/26/18
Memorandum BURNS ~ MS:DONNELL Document No.: BMCD-GWREMED-TM006 Revision: A Date:
February 24, 2021 Jeff Lux, EPM To:
From:
John Hesemann, Bums & McDonnell Ashley Anstaett, Bums & McDonnell
Subject:
Basis of Design Addendum No. 2 for Groundwater Remediation An addendum to the Basis of Design for Groundwater Remediation (2018 BOD) 1 was prepared in February 2019 to review additional groundwater monitoring data and assess the potential need for revisions to the 2018 BOD to support detailed remediation design activities (i.e., 90%
Design). Since the February 2019 BOD Addendum (BOD Addendum No. 1)2 was issued, the original site remediation approach has transitioned to a phased approach, necessitating revisions to the remediation design and Facility Decommissioning Plan. Detailed (90%) design of the phased remediation approach will occur following completion and submittal of the Cimarron Facility Decommissioning Plan - Revision 2 (D. Plan-Rev.2)3*
This memorandum serves as Remediation BOD Addendum No. 2 to support remediation design activities (i.e., Preliminary Design activities) and preparation of D. Plan-Rev.2 for the Cimarron Environmental Response Trust (CERT) remediation project at the Cimarron Site located in Guthrie, Oklahoma (Site). The following analyses and evaluations, conducted to support revisions to the Remediation BOD, are documented in this memorandum:
Particle tracking analysis using the existing groundwater flow models Remediation area, capture zone, and pore volume estimation Area-weighted concentration averaging for uranium and nitrate Time-specific concentration averaging for nitrate Estimation of uranium groundwater remediation timeframes Estimation of uranium treatment timeframes for recovered groundwater Estimation of Uranium and nitrate influent concentrations 1 Burns & McDonnell Engineering Company, Inc. (2018). Basis of Design for Groundwater Remediation-Rev. C (Document No.: BMCD-GWREMED-TM00l). Kansas City: John Hesemann.
2 Burns & McDonnell Engineering Company, Inc. (2019). Basis of Design Addendum for Groundwater Remediation. (Document No.: BMCD-GWREMED-TM003). Kansas City: John Hesemann.
3 Bums & McDonnell Engineering Company, Inc. (2021). Cimarron Facility Decommissioning Plan - Revision 2.
Kansas City: John Hesemann.
Memorandum (cont,d)
February 24, 2021 Page 2 of 11 Estimation of Nitrate effluent concentrations BURNS ~ M~DONNELL The first phase (Phase I) of the phased remediation approach will remediate uranium to the derived concentration goal level (DCGL) required for NRC license termination. Phase I includes groundwater remediation in the Western Area (WA) and Burial Area #1 (BAI) at the Site. Phase I WA remediation areas include the Western Alluvial Area (WAA) U>DCGL, 1206-NORTH and Western Upland Burial Area #3 (WU-BA3). Phase I BAI remediation areas include BAI Areas A, B, and C (BAI-A through BAl-C). In the WA, the WAA U>DCGL and 1206-NORTH will be remediated via groundwater extraction and WU-BA3 will be remediated via treated water injection. In BAI, groundwater extraction will occur in BAI-A through BAl-C, and treated water injection will occur in BAI-A. Water treatment during Phase I will be limited to uranium removal via ion exchange. All groundwater will be treated at the Western Area Treatment Facility (WA TF) and treated water that is not injected will be discharged to the Cimarron River via Outfall 001. This BOD addendum is focused on the design evaluations and revisions required to implement Phase I remediation.
BOD revisions associated with the phased remediation approached required particle tracking analyses to estimate capture zones for alluvial extraction wells, and to estimate influent groundwater concentrations for uranium and nitrate. Since nitrate treatment will not be conducted during Phase I, an additional analysis of nitrate effluent concentration was conducted to confirm nitrate levels will not exceed the concentration anticipated to be acceptable to the Oklahoma Department of Environmental Quality (DEQ) [approximately 30 milligrams per liter (mg/L)]. None of the Phase I remediation component locations or pumping rates were altered; however, the elimination of remediation components in WA and BAI alluvial areas altered the capture zones of the components that were retained, thus altering the remediation areas and influent uranium and nitrate concentrations associated with these components. These changes in remediation areas resulted in changes to pore volumes and, consequently, timeframes for uranium remediation and treatment. Finally, because hydraulic capture zones within the W AA U>DCGL and BAl-B areas changed, the stagnation zone analyses were reperformed for these areas.
The methods used to perform the analyses, evaluations and estimations described above were similar to those used in the previous BOD development effort. BOD updates and/or revisions are detailed in the following sections.
Memorandum (cont,d)
February 24, 2021 Page 3 of 11 BURNS ~ M~DONNELL 1.0 Phased Remediation Approach - Phase I Components and Operating Conditions As stated above, updates to the remediation BOD are based on the infrastructure and operating conditions associated with Phase I of the phased remediation approach planned for the Site.
1.1 As stated above, WA remediation areas included in Phase I include W AA U>DCGL, 1206-NORTH, and WU-BA3. WAA U>DCGL includes extraction wells GE-WAA-01 through GE-WAA-04; 1206-NORTH includes extraction trench GETR-WU-02; and WU-BA3 includes injection trench GWI-WU-01. None of the groundwater extraction flow rates or treated water injection flow rates associated with these remediation components were altered from the 2018 BOD (see figure provided in Attachment 1.1).
Groundwater extracted from the WA remediation components identified above will be treated for uranium via ion exchange. Following treatment, a portion of the treated water (8 gallons per minute [gpm]) will be injected into WU-BA3 via GWI-WU-01. The remaining treated water will be combined with the treated BAl effluent not used for injection and discharged to Outfall 001.
Remediation for nitrate is not included as part of Phase I groundwater remediation.
However, the nitrate concentration discharged to Outfall 001 must be reported to the DEQ in accordance with anticipated Oklahoma Pollutant Discharge Elimination System (OPDES) permit requirements. Consequently, the estimation of influent nitrate groundwater concentrations for individual WA remediation components and areas, and the estimation of combined treated water effluent nitrate concentrations were required to update the remediation BOD.
1.2 All BA 1 remediation areas (BA 1-A, BA 1-B and BA 1-C) will be remediated as part of Phase I of the proposed remediation approach. Infrastructure and operating conditions associated with BAl-A and BAl-B were not altered from the 2018 Basis of Design.
BAl-A includes groundwater extraction trenches GETR-BAl-01 and GETR-BAl-02 and injection trenches GWI-BAl-01 through GWI-BAl-03 (see figure provided in.1 ).
BAl-B includes extraction wells GE-BAl-02, GE-BAl-03, and GE-BAl-04, and BAl-C includes extraction wells GE-BAl-05 and GE-BAl-06. BAl-B and BAl-C will operate until the maximum contaminant level (MCL) for uranium (30 micrograms per liter
[µg/L]) is achieved in Area C, at which point wells GE-BAl-05 and GE-BAl-06 will cease operation. The combined pumping capacity of GE-BAl-05 and GE-BAl-06 will
Memorandum (cont,d)
February 24, 2021 Page 4 of 11 BURNS ~ MSDONNELL then be distributed evenly among BAI-B wells GE-BAI-02 through GE-BAI-04. For the purposes of estimating water treatment influent uranium concentrations and treatment and remediation timeframes, BAI-Bis referred to as BA1-B3R once wells in BAI-Care no longer operational. The area and pore volume ofBA1-B3R differ from BAI-B due the change in hydraulic capture zone resulting from the shutdown ofBAl-C wells GE-BAI-05 and GE-BAI-06.
Water extracted from BA 1 will be routed to the WA TF for uranium removal via a dedicated ion exchange treatment train. Following treatment, a portion of the treated water (approximately 18 gpm) will be returned to BAI for re-injection via injection trenches GWI-BAI-01 through GWI-BAI-03. The remaining treated effluent will be combined with the WA uranium treatment effluent and discharged via Outfall 001.
2.0 Revised Remediation Simulation and Particle Tracking Analysis The particle tracking analyses for the alluvial remediation areas (WAA U>DCGL and BAI-B, BAI-C, and BA1-B3R) were updated to reflect the phased groundwater treatment approach described in Section 1.0. Figures depicting the updated particle tracking analysis outputs are provided in Attachment 2.0.
2.1 The particle tracking analysis for BAI was updated to reflect the elimination of extraction wells GE-BAI-07 through GE-BAI-09. In addition, the original BOD assumed GE-BAI-05 through GE-BAI-07 would initially remain idle. As discussed in Section 1.2, GE-BAI-02 through GE-BAI-06 will be operational at the start of Phase I operations.
Once the uranium MCL is achieved in Area C, GE-BAI-05 and GE-BAI-06 will cease operation and the combined pumping capacity of these wells will be distributed evenly among BAI-B wells GE-BAI-02 through GE-BAI-04, creating a new remediation area referred to as BA1-B3R. A forward particle tracking analysis was used for BAI since the remediation area is defined by the 30 µg/L uranium concentration contour (see.0). The only substantive change resulting from the modifications described above was a change in the boundary between Areas BA 1-B and BA 1-C, as defined by the capture zones of GE-BAI-04 and GE-BAI-06.
2.2 As shown on the WA particle tracking figure included in Attachment 2.0, the capture zone of the WAA U>DCGL expanded significantly in the easterly direction due to the elimination of the WAA-BLUFF extraction wells from Phase I of the phase remediation approach. Consequently, a larger portion of the W AA nitrate plume, and higher concentrations of nitrate, will be captured by WAA U>DCGL extraction wells. As stated above, recalculation of estimated influent nitrate groundwater concentrations for
Memorandum (cont,d)
February 24, 2021 Page 5 of 11 BURNS ~ M~DONNELL individual WA remediation components and areas was required to estimate nitrate concentrations in the combined WA TF effluent, and confirm compliance with anticipated OPDES permit requirements.
To accurately estimate influent uranium and nitrate groundwater concentrations for individual WAA U>DCGL extraction wells, a reverse particle tracking analysis was used to account for uranium and nitrate concentrations across the entire estimated capture zone for each well. Also, because nitrate concentrations for individual WAA U>DCGL extraction wells are anticipated to increase over time (i.e., nitrate concentrations increase with distance east of the WAA U>DCGL extraction well alignment), a time-specific averaging approach was used to estimate influent nitrate concentrations for these wells.
Time-specific averaging was not required for uranium since the highest uranium concentrations are located along the W AA U>DCGL extraction well alignment.
Likewise, time-specific averaging was not required for BA 1 remediation components since the highest uranium concentrations are located along the BA 1 extraction well alignment. Uranium and nitrate iso-concentration contours are presented on the WA particle tracking figure included in Attachment 2.0.
Remediation area and pore volume estimate calculations are discussed in Section 3.0 and area and time-specific concentration averaging for individual alluvial remediation components and areas is discussed in Section 4.0.
3.0 Revised Remediation Area and Pore Volume Estimates As discussed in Section 2.0, the capture zones of remediation components located in alluvial remediation areas WAA U>DCGL and BAl-B, BAl-C and BA1-B3R were altered as a result of the phased remediation approach. This necessitated the re-estimation of lateral extent (area) of each remediation area to support calculations of pore volume, influent concentration, and remediation and treatment timeframe.
3.1 Updated BAI remediation areas were calculated for BAl-B, BAl-C and BA1-B3R. As described in the 2018 BOD, the lateral extent of each remediation area was estimated based on the extent of the hydraulic capture zone within which uranium concentrations are at or above the MCL (30 µg/L) (see Attachment 3.1). The aquifer pore volume targeted for remediation in each area was estimated based on the lateral extent and saturated thickness of the area, estimated as described in the 2018 Technical
Memorandum (cont~d)
February 24, 2021 Page 6 of 11 BURNS ~ M~DONNELL Memorandum entitled Input Parameters for Updated Remediation Duration Estimates (2018 Input Parameters Memo )4.
3.2 Two separate remediation areas, one for uranium and another for nitrate, were estimated for the WAA U>DCGL area based on the updated particle tracking analysis results discussed above. Although nitrate is not a target constituent for Phase I groundwater remediation, it is necessary to establish nitrate "remediation areas" to estimate influent nitrate concentrations for the purposes described above. The uranium WAA U>DCGL remediation area was estimated based on the extent of the hydraulic capture zone in which uranium concentrations are at or above the MCL. The complete zone of W AA U>DCGL hydraulic capture was established as the nitrate remediation area. Uranium and nitrate remediation areas are depicted on the figures included in Attachment 3.2.
As described in the 2018 Input Parameters Memo, the updated W AA U>DCGL aquifer pore volumes targeted for remediation were calculated estimated based on the lateral extents of the uranium and nitrate remediation areas and the saturated thickness of the W AA U>DCGL area.
3.3 Uranium pore volumes were used to calculate area-weighted concentrations, influent concentrations and remediation and treatment durations. Nitrate pore volumes were used to calculate area-weighted concentrations, influent concentrations and effluent concentrations.
4.0 Revised Area-Weighted and Time-Specific Influent Concentration Estimates Area-weighted influent uranium concentrations were updated for remediation areas WAA U>DCGL, BAl-B, BAl-C and BA1-B3R using the same methodology described in the 2018 BOD. Area-weighted influent concentrations were used to support uranium remediation duration estimate calculations. Area-weighted influent nitrate concentrations were also updated for WAA U>DCGL and time-specific nitrate influent concentrations were calculated to support estimations of WA TF influent and effluent nitrate concentrations.
4.1 Uranium and nitrate (W AA U>DCGL only) isopleths and updated particle tracking outputs (Section 2.0) were used to conduct incremental groundwater concentration 4 Bums & McDonnell Engineering Company, Inc. (2018). Input Parameters for Updated Remediation Duration Estimates. Kansas City: John Hesemann.
Memorandum (cont,d)
February 24, 2021 Page 7 of 11 BURNS ~ M~DONNELL averaging within the capture zone of each alluvial remediation area (W AA U>DCGL, BAl-B, BAl-C and BA1-B3R). Results of the area-weighted averaging analysis completed for each remediation area are presented in Attachment 4.1.
4.2 Nitrate isopleths and updated particle tracking outputs (Section 2.0) were used to conduct incremental groundwater concentration averaging within time-specific (annual) capture zones of each WAA U>DCGL extraction well to account for increasing influent nitrate concentrations over the course of groundwater extraction. The time-specific concentrations were estimated by conducting incremental, area-weighted concentration averaging within the hydraulic capture zone of a given year. The entire W AA U>DCGL nitrate plume is anticipated to be captured within 5 years; therefore, time-specific concentration averaging was only performed for Years 1 through 5 (see Attachment 4.2).
The time-specific nitrate concentration estimates are considered conservative since the effects of dilution and dispersion are not accounted for in the analysis. As groundwater with elevated nitrate concentrations (located significant distances from the extraction wells) migrates toward the extraction wells, it will encounter and mix with groundwater with lower nitrate concentrations; however, the nitrate concentration estimated at the original plume location is assumed to persist over the entire groundwater capture flow path.
Influent nitrate concentrations were assumed to increase above the initial concentration for the following extraction wells:
GE-WAA the estimated initial nitrate influent concentration for this well is 32 mg/L; however, the concentration is assumed to increase as groundwater with higher nitrate concentrations, located to the east, are drawn toward the well. For the purposes of estimating W ATF influent concentrations, the influent nitrate concentration for this well is assumed to increase to a maximum of approximately 5 9 mg/L in Year 5 ( see.2).
GE-W AA the estimated initial nitrate influent concentration for this well is 31 mg/L; however, the concentration is also expected to increase as higher concentrations, located to the east, are drawn toward the well. For the purposes of estimating WA TF influent concentrations, the influent nitrate concentration for this well is assumed to increase to approximately 4 7 mg/L, during Year 3 of operation, then decline thereafter (see Attachment 4.2).
Memorandum (contJdJ February 24, 2021 Page 8 of 11 BURNS ~ MSDONNELL 4.3 Results from the incremental, area-weighted (and time-specific) averaging analysis for each applicable remediation area and groundwater extraction component are presented in Attachments 4.1 and 4.2. Calculation files in native (MS Excel) format can be provided to facilitate review of calculation methods (i.e., formulas, references, inputs, etc.) by Nuclear Regulatory Commission (NRC) and DEQ personnel.
5.0 Revised Remediation Duration Estimates Uranium remediation duration estimates were revised for the WAA U>DCGL, BAl-B, BAl-C, and BA1-B3R remediation areas using the remediation areas and pore volumes described in Section 3.0, in accordance with the calculation methodology and input parameters described in the 2018 BOD. The remediation duration estimate calculations and results for WAA U>DCGL, BAl-B, BAl-C, and BA1-B3R are included as Attachment 5.0. Remediation duration estimate calculation files in native (MS Excel) format can be provided to facilitate review of calculation methods (i.e., formulas, references, inputs, etc.) by NRC and DEQ personnel.
The duration estimates for BAl-B and BAl-C were evaluated for achievement of both the DCGL and MCL. The DCGL in BAl-B is achieved in approximately 36 months. BAl-C is already below the DCGL upon commencement of operation. The MCL is achieved in approximately 60 months in BAl-B and 108 months in BAl-C. As discussed in Section 1.2, BAl-C extraction components cease operation upon achievement of the MCL. The capacity is then evenly distributed across the wells operating in area B3, which continue to operate until the DCGL is achieved in BAI-A in order to maintain the minimum flow rate requirement for treatment. It is predicted that the uranium concentration in both BAl-B and BAl-C will be below the MCL upon commencement ofB3R operations.
6.0 Revised Nitrate Influent Concentration Estimates As discussed in Section 4.0, incremental groundwater concentration averaging was conducted within time-specific (annual) capture zones of each WAA U>DCGL extraction well to account for increasing influent nitrate concentrations over the course of remediation. Future maximum nitrate influent concentrations are anticipated to be higher than initial concentrations for wells GE-WAA-01 and GE-WAA-02, while future maximum nitrate influent concentrations are anticipated to be lower than initial concentrations for GE-WAA-03 and GE-WAA-04. Due to the potential for influent WAA U>DCGL nitrate concentrations to increase over time, time-specific influent nitrate concentrations for each WAA U>DCGL were factored into the influent nitrate concentration analysis. The process is described below in detail.
Memorandum (cont'd)
February 24, 2021 Page 9 of 11 BURNS ~ M~DONNELL 6.1 As described in Section 4.0, time-specific, area-weighted nitrate concentrations were calculated for each WAA U>DCGL extraction well for each of the first five years of groundwater extraction (i.e., C1, C2,..., Cs). The C1 concentration for each WAA U>DCGL extraction well was then compared to the nitrate concentration estimated via interpolation at each extraction component location (interpolation performed using the Surfer software application). The higher of the two concentrations was then selected as the representative initial concentration (Ci) for the extraction well. The highest of the time-specific nitrate concentrations for each well was established as the maximum nitrate concentration (Cmax). The time-specific nitrate concentrations for each WAA U>DCGL extraction well are presented in Attachment 4.2 and the Ci and Cmax nitrate concentration for each well are presented in Attachment 6.1.
6.2 Because groundwater is recovered from both the W AA U>DCGL and 1206-NORTH remediation areas in the WA, flow-rate weighted averaging was used to was used to calculate the estimated initial and time-specific influent nitrate concentrations for the combined influent WA treatment stream. The flow-rate weighted average calculations used to estimate the initial WA influent nitrate concentration were conducted in accordance with the methodology described in the 2018 BOD. The results of these calculations are summarized in Attachment 6.2. As shown in the attachment, the influent concentration for 1206-NORTH (extraction trench GETR-WU-02) is expected to decline below measurable levels by the end of Year 1. Calculation files in native (MS Excel) format can be provided to facilitate review of calculation methods (i.e., formulas, references, inputs, etc.) by NRC and DEQ personnel.
6.3 Flow rate-weighted average nitrate concentrations for the combined WA influent for Years 1 through 5 are summarized in Attachment 6.3. Although influent nitrate concentrations for GE-WAA-01 and GE-WAA-02 increase over time, results of the flow rate-weighted averaging reveals that the maximum combined WA influent nitrate concentration still occurs at time zero (i.e., Ci = Cmax). Calculation files in native (MS Excel) format can be provided to facilitate review of calculation methods (i.e.,
formulas, references, inputs, etc.) by NRC and DEQ personnel.
6.4 To model long-term nitrate concentrations for the WAA U>DCGL influent stream, and its contribution to the combined WA TF influent, the flow rate-weighted average, time-specific concentrations calculated for Years 1 through 4 were assumed as the initial nitrate influent concentration for each corresponding year. Due to the potential for influent nitrate concentrations to increase between Years 2 and 3, based on flow rate-
Memorandum (contJd)
February 24, 2021 Page 10 of 11 BURNS ~ M~DONNELL weighted averaging results (see Section 6.3), W AA U>DCGL influent nitrate concentrations during the first three years of operation were held constant and the first-order kinetic concentration decay model described in the 2018 BOD was not applied.
Following Year 3, the influent nitrate concentration was increased to the Year 4 time-specific concentration and the first-order kinetic concentration decay equation was applied to model continuous influent nitrate concentration reductions through the end of operations.
The concentration decay model was applied to the 1206-NORTH nitrate influent concentration from the start of operations, with no nitrate expected in the influent after month 13. The results of the WA nitrate influent concentration decay analysis are presented in Attachment 6.4. In addition, calculation files in native (MS Excel) format can be provided to facilitate review of calculation methods (i.e., formulas, references, inputs, etc.) by NRC and DEQ personnel.
7.0 Revised Uranium Influent Concentration Estimates Uranium influent concentrations were recalculated for WAA U>DCGL, BAl-B, BAl-C, and BA1-B3R. Using the same process described in the 2018 BOD, the uranium influent concentration calculations for WAA U>DCGL and BAl-B, BAl-C and BA1-B3R were updated using the revised remediation areas and pore volume estimates presented in Section 3.0. A decay analysis was performed in accordance with the 2018 BOD to estimate uranium flow rate weighted-average influent concentrations for each combined remediation area at the conclusion of remediation operations. Results of the WA influent uranium concentration estimates are presented in Attachment 6.3. Results of the WA uranium decay analysis, BAI uranium influent concentration estimates, and BAI uranium decay analysis are presented in Attachment 7.0.
8.0 Calculation of Combined WA, BAl Nitrate Effluent Concentration To determine the concentration of nitrate discharged at Outfall 001, a new flow rate-weighted average concentration was calculated for the initial nitrate concentration (Ci) and final nitrate concentration (Cf) once the WA treatment effluent is combined with the treatment effluent from BAI. Based on the proposed process, 8 gpm of nitrate-impacted water will be re-injected into the WA, via GWI-WU-0IA, and 18 gpm of treated effluent from BAI will be re-injected via GWI-BAl-01 through GWI-BAl-03. The combined WA/BAI nitrate flow weight-rated average nitrate concentration was therefore based on a combined flow rate of 181 gpm, equal to the sum of the WA and BA 1 groundwater extraction flow rates, minus the treated water injection flow rate for each area. As described in Sections 4.0 and 6.0, Ci is also projected to represent the maximum nitrate influent concentration during the treatment process. Results of the combined
Memorandum (cont,d)
BURNS ~ M~DONNELL February 24, 2021 Page 11 of 11 WA/BA 1 effluent nitrate concentration estimates and decay analysis are presented in Attachment 8.0.
9.0 Reassessment of Stagnation Zone Potential The potential for hydraulic stagnation in alluvial remediation areas exceeding the NRC uranium criterion (WAA U>DCGL and BAl-B) was reassessed in accordance with the methodology outlined in the 2018 BOD. The results of the stagnation zone analysis for WAA U>DCGL and BAl-B are presented in the figures included as Attachment 9.0. The figures indicate that the alternating operating scenarios should eliminate the potential for hydraulic stagnation.
Attachments:.1 - Remediation Area Extraction/Injection Components.0 - Particle Tracking Figures.1 - BA 1 Remediation Areas.2 - WA Remediation Areas.1 - Area-Weighted Concentration Averaging Results.2 - Time-Weighted Concentration Averaging Results.0- Remediation Duration Estimates.1 - Initial & Maximum Influent Concentrations.2 - Nitrate Influent Concentrations by Year.3 - Western Area Treatment Duration Analysis.4 - Western Area Nitrate Decay Analysis.0- BAI Uranium Analysis.0- Western Area, BAI Nitrate Effluent Analysis.0 - Stagnation Zone Analysis Figures