ML21076A477
| ML21076A477 | |
| Person / Time | |
|---|---|
| Site: | 07000925 |
| Issue date: | 02/26/2021 |
| From: | Environmental Properties Management, Enercon Services, Burns & McDonnell Engineering Co, Veolia Nuclear Solutions Federal Services |
| To: | Office of Nuclear Material Safety and Safeguards, Cimarron Environmental Response Trust, NRC Region 4 |
| Shared Package | |
| ML21076A479 | List:
|
| References | |
| Download: ML21076A477 (51) | |
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 n c:.
R=i. + e.J::K Table 1: Retardation Calculation Bulk Density Nitrate Kd 1
W_ml) Porosity [n] (ml/g)2 Retardation 1.81 0.3 0.6 4.62 Table 2: Remediation Pore Volume Calculation Average Plume Area of Plume [A] Thickness [b]3 Pore Volume (ft3) Pore Volume [PV) 1 (ft2) Porosity [n] (ft) [PV = b*n*A] (gallons)
I 732,905 0.3 19 4,177, 559 31,248, 138
,~ \(
Table 3: Estimated Initial A_g_ueous-Phase Contaminant Concentration I Qs I. \
Initial Aqueous-Phase Contaminant
(
I ;P' 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,)_
)
~
~____/
I Initial Aqueous-Phase Nitrate Cleanup Contaminant Concentration 6 Concentration No. of Pore Volumes 4 5 I R (mg/L) (mg/L) (#PV = -R ln(Cleanup/lnitial)] Remarks 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)
Pore Volume Flow Rate Flow Rate Duration Estimate No. of Pore Volumes (gallons) (gpm)7 (gpd) Duration Estimate (days) (months) Remarks Time to achieve cleanup goal and 8.3 31,248,138 99 142,560 1,826 60.1 discontinue remediation.
Definitions: Notes:
1 ml-milliliters Ass umes 30% transmissve porosity for alluvial sand, as presented in the Technica l Memorandum (TM002), September 10, 2018, page 3.
2 g-gram Kd derived from previous studies as mentioned in the Technical Memorandum (TM002), September 10, 2018, page 4.
3 3 ft - cubic feet Saturated zone thickness assumed to be 16 feet, as presented in the Technical Memorandum (TM002), September 10, 2018, page 5.
4 Kd - distribution coefficient Remediation will be discontinued when the nitrate groundwater concentration reaches the ACL (22.9 mg/L) 5 ug - microgram The 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 L - liter sampling results for monitoring events conducted from 2011 through Q2 2017), (2) the concentration estimated by conducti ng incremental averaging of concentrations within the specified treatment area . The incremental averaging is performed gpm - gallons per minute 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 gpd - gallons per day variable.
6 DCGL - derived cleanup goal level Number of pore volumes assumes linear, reversible and in stantaneous sorption, and may result in an underestimation of cleanup timeframe estimates.
7 ACL - alternative contaminant level Flow rate is based on the nominal combined groundwater recovery rate for extraction wells GE-WAA-01 through GE-WAA-04.
- Remediation durations presented herein are estimates and do not account for all factors contributing to the actual time required to remediate plumes via groundwater injection and extraction. Estimates will be updated using system performance and groundwater monitoring data collected during the early stages of remedia l operations.
Remediation and Water Treatment Duration Estimate Calculations /
WAA U>DCGL (Alluvium/Transition Zone/SSB)
Uranium R = 1 +~K n a
/
Table 1: Retardation Calculation Bulk Density Uranium Kd 19 **"""" *
/
(g/ml_l Po rosi!Y_[_r1}1 _{_rrll/_j}2 Retardation [R}
1.81 0.3 13.07 GeJ...J..10 Table 2: Remediation Pore Volume Calculation Average Plume 3
Area of Plume [A] Thickness (b] Pore Volume (ft3) Pore Volume [PV]
1 (ft2) Porosity (n] (ft) [PV= b*n*A] (gallons) 732,905 0.3 19 4,177,559 31,248,138 Table 3: Estimated Initial A_g_ueous-Phase Contaminant Concentration Initial Aqueous-Phase Contaminant Concentration
/
/
Concentration Basis Incrementa l Averaging of Concentrations within Remediation Area (ug/L) 76.16 Average uranium concentration Remarks
- o .-**~
/
l Ma ximum Representative Concentration within
! \ \ \\(
I \ ' \._ .,
Remediation Area 177.80 Representative uranium concentration for WELL T-62
\, <~<::::, - W AA U>DCGL - Uraniu m Table 4a: Estimated Number of Pore Volumes to Achieve Remediation Goal (119 ug/L) Y1 **----- "ir Uranium Clea nup Initial Aqueous-Phase 6
Concentration Contaminant Concentration No. of Pore Volumes
~ 4 E R (ug/L) (ug/L)5 [#PV = -R ln(Cleanup/lnitial)] Remarks
~ Pore volumes required to achieve cleanup goal (DCGL) and C
0 13.07 119 178 5.2 discontinue remediation
~
Cl Table Sa: Estimated Time to Achieve Remediation Goal (119 ug/L)
..J
\!) Pore Volume Flow Rate Flow Rate Duration Estimate u
Cl No. of Pore Volumes (gallons) (gpm)7 (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 Remediat ion Goal (30 ug/L)
Uranium Cleanup Initial Aqueous-Phase 6
B Concentration Contaminant Concentration No. of Pore Volumes 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 Cl
~ Table Sb: Estimated Time to Achieve Remediation Goal (30 ug/L)
..J Pore Volume Flow Rate Flow Rate Duration Estimate u
~ No. of Pore Volumes (gallons) (gpm)7 (gpd) Duration Estimate (days) (months) Remarks Time to achieve cleanup goal (MCL) and 23.3 31,248,138 99 142,560 5,097 167.6 discontinue remediation .
Definitions: Notes:
1 ml-milli liters Assumes 30% transmissve porosity for all uvial sand, as presented in the Technical Memorandum (TM002), Sept ember 10, 2018, page 3.
2 g-gram Kd derived from previous studies as mentioned in the Technical Memorandum (TM002), September 10, 2018, page 4.
3 3 ft - cubic feet Saturated zone thickness assumed to be 16 feet, as presented in t he Technical Memorandum (TM002), September 10, 2018, page 5.
4 Kd - distribution coefficient Remediation wil l 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 ug - microgram 30 ug/L.
pCi/L - picocu ries per liter 5
L - liter The larger of the fol lowing is assumed as initial uranium concentration for estimating the groundwater remediation duration: (1) the ma ximum representative concentration reported for any well within the gpm - gallons per minute remediation area (determ ined using sampling results for monitoring events conducted from 2011 through Q2 2017), (2) the concentration estimated by conducting incremental averaging of concentrations w ithin the specified treatment area . The incremental averaging is performed using isopleth contours developed using representative groundwater concentrations for monitor we ll s located within the remediation area gpd - gallons per day (see Iner. AWCA Ca/cs_Rev. C (09-05-18}. xlsx ). Initial aqueous-phase contaminant concentrations will be variable.
DCGL - derived cleanup goal level 6
MCL - maximum contaminant level Number of pore volumes assumes linear, reversible and instantaneous sorption, and may result in an underestimation of cleanup timefram e estimates.
7 Flow rate is based on the nominal combined groundwater recovery rate for extraction wells GE-WAA-01 through GE-WAA-04.
- Remediation durations presented herein are estimates and do not account for all factors contributing to the actual time requi red to remediate plumes via groundwater injection and extraction . Estimates w ill 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)
R = 1 + P i.lK" Table 1: Retardation Calculation n -
Bulk Density Nitrate Kd 1
(g/ml) Porosity (n] (mf/g)2 Retardation [R) 1.81 0.1 0.6 11.86 Table 2: Remediation Pore Volume Calculation Average Plume 3
Area of Plume [A] Thickness (b] Pore Volume (ft3) Pore Volume (PV]
1 (ft2) Porosity (n] (ft) (PV = b*n*A] (gallons) 484,310 0.1 8 387,448 2,898,111
~
Table 3: Estimated Initial A_g_ueous-Phase Contaminant Concentration '-
'~, ___ ;"~"'-,
Initial Aqueous-Phase Contaminant Concentration '~ 0 j "'
Concentration Basis Remarks ~-- ~ -- WU-UPl - Nitrat e Incremental Averaging of Concentrations within Remediation Area (mg/L) 203.88 Average nitrate concentration
~ - - -------
Maximum Representative Concentration within Remediation Area 379.70 Representative nitrate concentration for WELL 1321 Table 4: Estimated Number of Pore Volumes to Achieve Remediation Goal (22.9 mg_/L)
Nitrate Cleanup Initial Aqueous-Phase 6
Concentration Contaminant Concentration No. of Pore Volumes 4 5 R (mg/L) (mg/L) [#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)
Pore Volume Flow Rate Flow Rate Duration Estimate No. of Pore Volum es (gallons) (gpm)7 (gpd) Duration Estimate (days) (months) Remarks Time to achieve cleanup goal and 33.3 2,898,111 44 63,360 1,523 50.1 discontinue remediation .
Definitions: Notes:
1 ml - milliliters Assumes 30% transmissve porosity for alluvial sand, as presented in the Technical Memorandum (TM002), Sept ember 10, 2018, page 3.
2 g-gram Kd derived from previous stud ies as mentioned in the Technical Memorandum (TM002), September 10, 2018, page 4.
3 3 ft - cubic feet Saturated zone thickness assumed to be 8 feet, as presented in the Technical Memorandum (TM002), September 10, 2018, page 5.
4 Kd - distribution coefficient Remediation will be discontinued when the nitrate groundwater concentration reaches the ACL (22 .9 mg/L) .
5 ug - microgram The larger of the following is assumed as initial nitrate conce ntration for estimating the groundwater remediation duration : (1) the maximum representative concentration reported for any well within the L- liter remediation area (determined using sampling results for monitoring events conducted from 2011 th rough Q2 2017), (2) t he concentration estimated by conducting incremental averaging of concentrations within gpm - gallons per minute the specified treatment area . The incremental averaging is performed using isopleth contours developed using representative groundwater concentrations for monitor wells located within t he remediation area gpd - gallons per day (see Iner. AWCA Calcs_ Rev. C {09-05-18).xlsx ). Initial aqueous-phase contaminant concentrations wi ll be variab le.
6 DCGL - derived cleanup goal level Number of pore volumes assumes linear, reversible and instantaneous sorption, and may result in an underestimation of cleanup timeframe estimates.
7 ACL- alternative contaminant level Flow rate is based on the nominal combined groundwater injection rate for extraction trenches GWI-UPl -02 th rough GWI-UP l-04.
- Remediation durations presented herein are estimates and do not account for all factors contributing to the actua l time required to remediate plumes via groundwater injection and extraction. Estimates will be updated using system performance and groundwater monitoring data collected during the ea rly stages of remedial operations .
Remediation and Water Treatment Duration Estimate Calculations WU-UP1 (SSA)
Uranium R :;;;; 1 + !:.EK0 Table 1: Retardation Calculation n Bulk Density (g/ml)
I Porosity [n]
1 II Uranium Kd (mf/g)2 II II Retardation [RI
/ _,,., -
1.81 0.1 55 .30 Table 2: Remediation Pore Volume Calculation .....____
Average Plume 3
Area of Plume [A) Thickness [b] Pore Volume (ft3) Pore Volume [PV) 1 (ft2) Porosity [n) (ft) [PV = b*n*A] (gallons) 484,310 0.1 8 387,448 2,898,111 Table 3: Estimated Initial Agueous-Phase Contaminant Concentration Initial Aqueous-Phase Contaminant Concentration Concentration Basis (ug/L) Remarks Incrementa l Averag ing of Concentrat ions within Remediati on Area 15.61 Average uranium concentration Maximum Represent ative Concentration within WU-UPl - Ura nium Remed iation Area 22 .11 Representative uranium concentrat ion for WELL 1312 Table 4: Estimated Number of Pore Volumes to Achieve Remediation Goal (30 ug/L)
Uranium Cleanup Initial Aqueous-Phase 6
Concentration Contaminant Concentration No. of Pore Volumes 4
R (ug/L) (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.)_
Pore Volume Flow Rate Flow Rate Duration Estimate No. of Pore Volumes (gallons) (gpm)7 (gpd) Duration Estimate (days) (months) Remarks Time to achieve cleanup goal (MCL) and 0.0 2,898,111 44 63,360 0 0. 0 discontinue remediation .
Definitions: Notes:
1 ml-milliliters Assumes 30% transmissve porosity for alluvial sand, as presented in the Technical Memorandum (TM002), September 10, 2018, page 3.
2 g - gram Kd derived from previous studies as mentioned in the Technica l Memorandum (TM002), September 10, 2018, page 4.
3 3 ft - cubic feet Saturated zone thickness assumed to be 8 feet, as presented in the Technica l Memorandum (TM002), September 10, 2018, page 5.
4 Kd - distributi on coefficie nt Remediation will be discontinued when the uranium groundwater concentration reaches the MCL (30 ug/L).
5 ug - microgram The larger of the following is assumed as in itia l uranium concentration for estimating the groundwater remediat ion durat ion : (1) the maximum representative concentration reported for any well within the remediation area L- liter (determined using sampling result s for monitoring events conducted from 2011 through Q2 2017), (2) the concentration estimated by conducting incrementa l averaging of concentrations within the specified treatment area .
gpm - gal lons per minute The incremental averaging is performed using isopleth contours developed using representative groundwater concentrations for monitor wells located within the remediat ion area (see Iner. AWCA Calcs_Rev. C (09 gpd - ga llons per day 18}.xlsx ). Initia l aqueous-phase contaminant concentrations will be variable.
6 DCGL - derived cleanup goa l level Number of pore volumes assumes li near, revers ible and instantaneous sorption, and may result in an underest imation of cl eanup timeframe estimates .
7 MCL - maximum contam inant level Flow rate is Jased on the nomina l combined groundwate r injection rate for extraction t renches GWI-UPl -02 through GWI-UPl -04.
- Remed iation durations presented herein are estimates and do not account for all factors contributing to the actual time required to remediate plumes via groundwater inj ection and extraction. Est imates will be updated using system performance and groundwater monitoring data collected during the early stages of remedia l operations .
Remediation and Water Treatment Duration Estimate Cal culations WU-UP2-SSA R = 1 + pn"'K*a Table 1: Retardation Calculation Bulk Density Nitrate Kd 1 2 (g/ml) Porosity [n] (ml/g) Retardation [R]
1.81 0.1 0.6 11.86 Table 2: Remediation Pore Volume Calculation Average Plume Area of Plume [A] 3 Thickness [b]3 Pore Volume (ft ) Pore Volume [PV]
1 (ft2) Porosity [n) (ft) [PV= b*n*A] (gallons) 419,878 0.1 8 335,903 2,512,551
/ . .- , .""
Table 3: Estimated Initial Aqueous-Phase Contaminant Concentration '-._'3/4.
Initial Aqueous-Phase ~ ""'"* ....
'~
Contaminant Concentration ", ...................... ,
- WU-UP2 _ Nitrate Concent ration Basis (mg/L) Remarks -L Incremental Averaging of Concentrations within 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 6
Concentration Contaminant Concentration No. of Pore Volumes 4
R (mg/L) (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)
Pore Volume Flow Rate Flow Rate Duration Estimate No. of Pore Volumes (gallons) (gpm)7 (gpd) Duration Estimate (days) (months) Remarks Time to achieve cleanup goal and 44.9 2,512,551 56 80,640 1,398 46.0 discontinue remediation.
Definitions: Notes:
1 ml - milliliters Assumes 30% transmissve porosity for alluvial sand, as presented in the Technical Memorandum (TM002), September 10, 2018, page 3.
2 g-gram Kd derived from previous studies as mentioned in the Technical Memorandum (TM002), September 10, 2018, page 4.
3 ft 3 - cubic feet Saturated zone thickness assumed to be 8 feet , as present ed in the Technical Memorandum (TM002), September 10, 2018, page 5.
4 Kd - distribution coefficient Remediation will be discontinued when the nit rate groundwater concentration reaches the ACL (22.9 mg/L) .
5 ug - microgram The larger of the following is assumed as initial nitrate concentration for estimating the groundwater remediatio n du ration : (1) the maximum representat ive concentration reported for any well within the L- liter remediation area (determined using sampling results for monitoring events conducted from 2011 through Q2 2017), (2) t he co ncentration estimated by conducting incremental averaging of concentrations within gpm - gallons per minute the specified treatment area. The incremental averaging is performed using isopleth contours developed using re presentative groundwater concentrations for monitor wells located within t he remediation area gpd - gallons per day (see Iner. A WCA Calcs_Rev. C {09-05-18).xlsx ). Initial aqueous-phase contaminant concentrations will be variable.
6 DCGL - derived cleanup goal level Number of pore volumes assumes linear, reversible and instantaneous sorption, and may result in an underestimat ion of cleanup timeframe estimates.
7 ACL - alternative contaminant level Flow 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 estimat es 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 remedi al operations.
Remediation and Water Treatment Duration Estimate Calculations WU-UP2-SSA Uranium R =: l +~K, Table 1: Retardation Calculation n "
Bulk Density Uranium Kd (g/ml) Porosity [n) 1 (ml/g)2 Retardation [R] I 1.81 0.1 3 55.30 I Table 2: Remediation Pore Volume Calculation Average Plume 3
Area of Plume [A] Thickness [b] Pore Volume (ft3) Pore Volume [PV]
1 (ft2) Porosity [n] (ft) [PV = b*n*A] (gallons) 419,92 5 0. 1 8 335,940 2, 512,831 Table 3: Estimated Initial A_g_ueous-Phase Contaminant Concentration Initial Aqueous-Phase Contaminant Concentration Concentration Basis Incremental Ave raging of Concentrati ons within (ug/L) Remarks
. --....__*,,'~>
Remediation Area 26.34 Average uranium concentration Maximum Representat ive Concentration within / .~~.........L..-....'!..> WU-UP2 - Uranium I / -*.--~~ - - \
Remediation Area 81.92 Representative uranium concentrat ion for WELL 1381 Table 4: Estimated Number of Pore Volumes to Achieve Remediation Goal (30 ug/L)
Uranium Cleanup Initial Aqueous-Phase 6
Concentration Contaminant Concentration No. of Pore Volumes 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)
Pore Volume Flow Rate Flow Rate Duration Estimate No. of Pore Volumes (gallons) (gpm)7 (gpd) Duration Estimate (days) (months) Remarks Time to achieve cleanup goal (MCL) and 55.6 2,512,831 56 80,640 1,731 57.0 discontinue remediation.
Definitions: Notes:
1 ml -mi lliliters Assumes 30% transmissve porosity for alluvial sand, as presented in the Technical Memorandum (TM002), September 10, 2018, page 3.
2 g-gram Kd derived from previous studies as mentioned in the Technical Memorandum (TM002), September 10, 2018, page 4.
3 3 ft - cubic feet Saturated zone thickness assumed to be 8 feet, as presented in the Technica l Memorandum (TM002), September 10, 2018, page 5.
4 Kd - distri bution coefficient Remediation wi ll be discontinued when the uranium groundwater concentration reaches the MCL (30 ug/L).
5 ug - microgram The larger of t he fo llowing is assumed as initial uranium concentration for estimating the groundwater remediation durat ion: (1) the maximum representative concentration reported for any we ll within the remediation area L - liter (determined using sampling results for monitoring events conducted from 2011 through Q2 2017), (2) the concentration estimated by conducting incremental averaging of concentrations within the specified treatment area.
gpm - gallons per minute The incremental averaging is performed using isopleth contours developed using representative groundwater concentrations for monitor wel ls located within the remed iation area (see Iner. AWCA Calcs_Rev. C {09 gpd - gallons per day 18}.xlsx ). Init ial aqueous-phase contaminant concentrations wi ll be variable .
6 DCGL - derived cleanup goa l level Number of pore volumes assumes linear, reversible and instantaneous sorption, and may result in an underestimation of cleanup timeframe estimates.
7 MCL - maximum contam inant leve l Flow rate is based on the nomina l combined groundwater injection rate for extraction trenche s GWI-UPl-02 through GWI-UPl-04.
- Remediation durations presented herein are estimates and do not account for all factors contributing to the actua l time req ui red to remediate plumes via groundwater injection and extraction. Esti mates wi ll be updated using system performance and groundwater mon itoring 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)
R =l + P1c;, Kd Table 1: Retardation Calculation n Bulk Density Uranium Kd 1 2 (g/ml) Porosity [n) (ml/g) Retardation [RI 1.81 0.3 0.6 4.62 Table 2: Remediation Pore Volume Calculation Average Plume 3
Area of Plume [A] Thickness [b] Pore Volume (ft3) Pore Volume [PV]
1 (ft2) Porosity [n) (ft) [PV = b*n*A] (gallons) 397,843 0.3 20 2,387,058 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 6
Concentration Contaminant Concentration No. of Pore Volumes 4 5 R (ug/L) (ug/L) [#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)
Pore Volume Flow Rate Flow Rate Duration Estimate No. of Pore Volumes (gallons) (gpm)7 (gpd) Duration Estimate (days) (months) Remarks Time to achieve cleanup goal (ACL) and 0.0 17,855,194 10 14,400 0.0 0.0 discontinue remediation.
Definitions: Notes:
1 ml - milliliters Assumes 30% transmissve porosity for alluvial sand, as presented in the Technical Memorandum (TM002), September 10, 2018, page 3.
2 g - gram Kd derived from previous studies as mentioned in the Technical Memorandum (TM002), September 10, 2018, page 4.
3 ft3 - cubic feet Saturated zone thickness assumed to be 20 feet, as presented in the Technical Memorandum (TM002), September 10, 2018, page 5.
4 Kd - distribution coefficient Remediation will be discontinued when the nitrate groundwater concentration reaches the ACL (22 .9 mg/L).
5 ug - microgram The larger of the following is assumed as initial nitrate concentration for estimating the groundwater remediation duration: (1) the maximum representative concentration L - liter reported for any well within the remediation area (determined using sampling results for monitoring events conducted from 2011 through Q2 2017), (2) the concentration gpm - gallons per minute estimated by conducting incremental averaging of concentrations within the specified treatment area. The incremental averaging is performed using isopleth contours gpd - gallons per day 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 DCGL - derived cleanup goal level aqueous-phase contaminant concentrations will be variable.
6 ACL - alternative contaminant level Number of pore volumes assumes linear, reversible and instantaneous sorption, and may result in an underestimation of cleanup timeframe estimates.
7 Flow rate is based on the nominal 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 R = l + !!..£1(.
n a
/
Table 1: Retardation Calculation 15 Bulk Density Uranium Kd (g/ml) Porosity [n] 1 (ml/g)2 Retardation [Rl 1.81 0.3 2 13.07 Table 2: Remediation Pore Volume Calculation Average Plume 3
Area of Plume [A] Thickness [b] Pore Volume (ft3) Pore Vol ume [PV) 1 (ft2) Porosity [n] (ft) [PV = b*n*A] (gallons) ,. -----
397,843 0.3 20 2,387,058 17,855,194 /
I I
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 Remed iation Area 64.07 Representative uranium concentration for WELL T-97 ,)~\~<' l '-<:__-- -
- ~-,;:_ __ WAA -WEST- Uranium Table 4: Estimated Number of Pore Volumes to Achieve Remediation Goal (30 u_g[_L)
Uranium Cleanup Initial Aqueous-Phase Contaminant Concentration 6 Concentration No. of Pore Volumes 4 5 R (ug/L) (ug/L) [#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)
Pore Volume Flow Rate Flow Rate Duration Estimate No. of Pore Volumes (gallons) (gpm)1 (gpd) Duration Estimate (days) (months) Remarks Time to achieve cleanup goal (MCL) and 9.9 17,855,194 10 14,400 12,294 404.2 discont inue remediation .
Definitions: Notes:
1 ml-milliliters Assumes 30% tran smissve porosity for alluvial sand, as presented in the Technical Memorandum (TM002), September 10, 2018, page 3.
2 g-gram Kd derived from previous studies as mentioned in the Technical Memorandum (TM002), September 10, 2018, page 4.
3 3 ft - cubic feet Saturated zone thickness assumed to be 20 feet, as presented in the Technical Memorandum (TM002), September 10, 2018, page 5.
4 Kd - distribution coefficient Remediation will be discontinued when the uranium groundwater concentration reaches the MCL (30 ug/L).
5 ug - microgram The larger of the following is assumed as initial uranium concentration for estimating the groundwater remediation du rat ion : (1) the maximum representative concentration reported for any well within the remediation area L- liter (determined using sampling result s for monitoring events conduct ed from 2011 through Q2 2017), (2) the concentration estimated by conducting incremental averaging of concentrations within th e specified treatment area .
gpm - gallons per minute 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 ).
gpd - gallons per day Initial aqueous-phase contaminant concentrations will be va riable .
6 DCGL - derived cleanup goal level Number of pore volumes assumes linear, reversible and instantaneous sorption, and may result in an underest imation of cl eanup timeframe estimates.
7 MCL - maximum contaminant level Flow 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 . 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 )
WAA-EAST (~lluvium/Transition Zone/SSB) GE-WAA-14 & GE-WAA-15 R = l + ~ f( ,
- ~---\
Table 1: Retardation Calculation n "
Bulk Density Nitrate K,i 1
(g/ml) Porosity_[nj (ml/g)' Retardation lfil 1.81 0.3 0.6 4.62 Table 2: Remediation Pore Volume Calculation Average Plume *v 14 _.* r
\.,,-~>-
. 7 /
~
- -\" - ---
1
= - "- . i 7
Area of Plume [A) 3 3 Thickn ess [b] Pore Volume (ft ) Pore Volume [PV) 1 (ft' ) Porosity [n] (ft) [PV = b*n*A] (gallons) 827,431 0.3 19 4,716,357 35,278,348
) / ----~ij 1 . C is .:,f> / /
Table 3: Estimated Initial A_g_ueous-Phase Contaminant Concentration
~~\
Initial Aqueous-Phase Contaminant Concentration L / ,V Concentration Basis (mg/l) Remarks c-~(C_
~ ;~ ~
Incremental Averaging of Concentrations w ithin 0 I
Remediation Area 55.44 Average nitrate concentration Maximum Representative Concentration within
~i Remediation Area 112.40 Table 4: Estimated Number of Pore Volumes to Achieve Remediation Goal (22.9 mg/L)
Representative nitrate concentration for WELL T-59
., - / '
Initial Aqueous-Phase Nitrate Clea nup Contaminant 6
Concentration Concentration R (mg/l) 4 (mg/L)'
No. of Pore Volumes
[#PV = -R ln(Cleanup/lnitial)) Remarks Pore volumes re quired to achieve cleanup goal and _______/
J jWAA-EAST - N1tra
- te 4.62 22.9 112 7.4 discontinue remedia t ion Table 5: Estimated Time to Achieve Remediation Goal (22.9 ug/L)
Pore Volume Flow Ra te Flow Rate Duration Estimate No. of Pore Volumes (gallons) (gpm)' (gpd) Duration Estimate (days) (months) Remarks Time to achiev e cleanup goal and 7.4 35,278,348 20 28,800 9,003 296.1 discontinue remediation.
Definitions: Notes:
ml -mill iliters ' Assumes 30% transmissve porosity for alluvial sand, as presented in the Technical Memorandum (TM002), September 10, 2018, page 3.
2 g-gram 1<,, derived from previous studies as mention ed in the Technica l Memorandum (TM002), September 10, 2018, page 4.
3 ft - cubi c feet ' saturated zone thickness assumed to be 19 feet, as presented in the Technical Memorandum (TM002), September 10, 2018, page 5.
4 K,i - distribution coefficient Remediation will be discontinued w hen the nitrat e groundwater con centration reaches the ACL (22.9 mg/L).
ug - microgram 5 The larger of the following is assumed as initial nitrate concentration fo r estimating th e groundwater remediation duration: (1) the maximum represent ati ve concentration reported for any well within the remed iation area (determined using sampling results for L-liter monitoring events conducted from 2011 through Q2 2017), (2) the concentration estimated by conducting incremental averaging of concent rations w ithin the specified treatment area. The incremental averaging is performed using isopleth contours developed using gpm - gallons per minute representative groundwater concentrations for monitor wells located within the remediation area (see Iner. AWCA Calcs_Rev. C (09-05-18}.xlsx ). Initial aqueou s-phase contaminant concentrations will be variable.
gpd - ga llons per day DCGL - derived cleanup goal level ' Number of pore volumes assumes linear, reversible and instantaneous sorption, and may result in an underestimation of cleanup timeframe estimate s.
7 ACL - alternative contaminant level Flow rate is based on the nominal combined groundwater recovery rate for extraction wells GE-WAA-14 and GE-WAA-15.
- Remediation duration s presented herein are estimates and do not account for all factors contributing to the actual time required to remedi ate plumes via groundwater injection and extraction . Estimates will be updated using system performance and groundwater monitoring data collected during the early stages of remedial operation s.
Remediation and Water Treatment Duration Estimate Calculations WAA-EAST (Alluvium/Transition Zone/SSB) GE-WAA-14 & GE-WAA-15 Uranium
- Table 1: Retardation Calculation R =l +~ n ICa 15 /
Bulk Density (g/ml) 1.81 Porosity [n]
0.3 1
II Uranium Kd (ml/g)2 II II Retardation [RI 13.07 Table 2: Remediation Pore Volume Calculation Average Plume Area of Plume [A] 3 Thickness [b] Pore Volume (ft3) Pore Volume [PV)
(ft2) Porosity [n]
1 (ft) [PV = b*n*A) (gallons) .----
827,431 0.3 Table 3: Estimated Initial Aqueous-Phase Contaminant Concentration 19 4,716,357 35,278,348 II/
I Initial Aqueous-Phase
/
Concentration Basis Incrementa l Averaging of Concentrations within Remediation Area Contaminant Concentration (ug/L) 39.88 Average uranium concentration Remarks
~\ (
,.\' ---
-"-)
\ ',., '
-.. ,_<*,::-:: ~-==* :. :~-
Maximum Representative Concentration within Remediation Area 92.26 Representative uranium concentration for WELL T-59 WAA-EAST- Uranium
- -~ ~---~ .....
Table 4: Estimated Number of Pore Volumes to Achieve Remediation Goal (30 ug/L)
Uranium Cleanup Initial Aqueous-Phase Contaminant Concentration 6 Concentration No. of Pore Volumes 4 5 R (ug/L) (ug/L) [#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)
Pore Volume Flow Rate Flow Rate Duration Estimate No. of Pore Volumes (gallons) (gpm), (gpd) Duration Estimate (days) (months) Remarks Time to achieve cleanup goal (MCL) and 14.7 35,278,348 20 28,800 17,981 591.2 discontinue remediation.
Definitions: Notes:
1 ml-milliliters Assumes 30% transmissve porosity for alluvial sand, as presented in the Technical Memorandum (TM002), September 10, 2018, page 3.
2 g-gram Kd derived from previous studies as mentioned in the Techn ical Memorandum (TM002), September 10, 2018, page 4.
3 3 ft - cubic feet Saturated zone thickness assumed to be 19 feet, as presented in the Technical Memorandum (TM002), September 10, 2018, page 5.
4 Kd - distribution coefficient Remediation will be discontinued when the uranium groundwater concentration reaches the MCL (30 ug/L) .
ug - microgram 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 L- liter (determined using sampling results for monitoring events conducted from 2011 through Q2 2017), (2) the concentration estimated by conducting incremental averaging of concentrations within the specified treatment area .
gpm - gallons per minute The incremental averaging is performed using isopleth contours developed using representative groundwater concentrations for mon itor wells located within the remediation area (see Iner. AWCA Calcs_Rev. C (09 gpd - gallons per day 18).xlsx ). Initia l aqueous-phase contaminant concentrations will be variable.
6 DCGL - derived cleanup goal level Number of pore volumes assumes linear, reversible and instantaneous sorption, and may result in an underest imation of cl eanup timeframe estimates.
7 MCL - ma ximum contaminant level Flow 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 ext raction. 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 R = l+&gd n
"'°
.* ~ ~
,._ G E TR -Wt.J-0 1A 1
(g/ml) Porosity [n] (ml/g)2 Retardation [Rl 1.81 0.05 0.6 22.72 Table 2: Remediation Pore Volume Calculation Average Plume Area of Plume [A) 3 Thickness [b] Pore Volume (ft3) Pore Volume [PV]
1 (ft2) Porosity [n] (ft) [PV= b
- n"A) (gallons) 243,436 0.05 19 231,264 1,729,856 r~
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 w ith in Remediation Area 15.55 Average nitrate concentration WU-PBA- Nitrate Ma ximum Representative Concentration within Remediation Area 75.79 Representative nitrate concentration for WELL 1319B-3 Table 4: Estimated Number of Pore Volumes to Achieve Remediation Goal (22.9 m_g_/L)
Initial Aqueous-Phase Nitrate Cleanup Contaminant 6
Concentration Concentration No. of Pore Volumes 4 5 R (mg/L) (mg/L) [#PV = -R ln(Cleanup/lnitial)) Remarks Pore volume s required to achieve cleanup goal and 22 .72 52 76 8.6 discontinue remediation Table 5: Estimated Time to Achieve Remediat ion Goal (22.9 ug/L)
Pore Volume Flow Rate Flow Rate Duration Estimate No. of Pore Volumes (gallons) (gpm)1 (gpd) Duration Estimate (days) (months) Remarks Time to achieve cleanup goal and 8.6 1,729,856 5 7, 200 2,056 67 .7 discontinu e remediation.
Definitions: Notes:
1 ml - milliliters Assumes 30% transmissve porosity for all uvia l sand, as prese nted in the Technica l Memorandum (TM002), Se ptembe r 10, 2018, page 3.
2 g-gram Kd derived from previous studies as mentioned in the Techn ical Memorandum (TM002), September 10, 201 8, page 4.
3 3 ft - cubic feet Saturated zone thickness assumed to be 19 feet, as presented in the Technical Memorandum (TM002) , September 10, 2018, page 5.
4 Kd - distribution coefficient The nitrate reme d iation goa l for the Sand stone B formation in the PBA is the ACL (52 mg/L).
ug - microgram 5 The large r of the following is assumed as initial nitrate concentration for estimating the groundwater remediation du ra tion: (1) the maximum repre sentative concentration reported for any well within the remediation area (determined using sampling L - liter resu lts for mon itoring events conducted from 2011 through Q2 2017), (2) the concentration estimated by conducting incremental averagi ng of concentra t ions within the specified treatment area. The incremental averaging is performed using isopleth gpm - gallons pe r minute contours developed using representative groundwater co ncentrations fo r monitor wells located within the remediation area (see Iner. AWCA Calcs_Rev. C {09-05-18).x/sx ). Initia l aqueous-pha se contaminant concentrations w ill be varia ble .
gpd - gallons per day 6
DCGL - derived cleanup goal leve l Number of pore vo lumes assumes line ar, reversible and instantaneous so rption, and may result in an und erestimation of cleanup timefra me estimate s.
7 ACL - alternative contaminant level Flow rate is based on the nominal groundwater re covery ra t e for extraction we ll GE-WU-01.
- Remediation durations pre se nted herein are estimate s and do not account for all factor s contributing to the actual time required t o rem ediat e plumes via groundwate r injection and extraction . Estimates will be updated usi ng system performan ce and groundwat er monitoring data collected du ring the early stages of rem edial operations.
Remediation and Water Treatment Duration Estimate Calculations WU-PBA (SSB)
Uranium ~ -:~~---------
R = l + f!..?. K ,
Table 1: Retardation Calculation n "-
Bulk Density Uranium Kd Retardation IBl 2
fg/ml (mlk' 1.81 109_60 Table 2: Remediation Pore Volume Calculation Area of Plume [A)
Average Plume Thickness [b]3 Pore Volume (ft3) Pore Volume [PV) 0 1
(ft2) Porosity [n) (ft) [PV = b*n*A] (gallons) 243,436 0_05 19 231,264 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 Concentratio ns 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)
Uranium Cleanup Initial Aqueous-Phase Concentration Contaminant Concentration No. of Pore Volumes6 4 5 R (ug/L) (ug/L) [#PV = -R ln(Cleanup/lnitial)) Remarks Pore volumes required to achieve cleanup goal (MCL) and 109.60 30 38 25 .9 discontinue remediation Pore Volume Flow Rate Flow Rate Duration Estimate No. of Pore Volumes (gallons) (gpm), (gpd) Duration Estimate (davs) (months) Remarks Time to achieve cleanup goal (MCL) and 25.9 1,729,856 5 7,200 6,232 204.9 discontinue remediation.
Definitions: Notes:
1 ml-milliliters Assumes 30% transmissve porosity for alluvial sand, as presented in the Technical Memorandum (TM002), September 10, 2018, page 3.
2 g-gram Kd derived from previous studies as mentioned in the Technical Memorandum (TM002), September 10, 2018, page 4.
3 3 ft - cubic feet Saturated zone thickness assumed to be 19 feet, as presented in the Technical Memorandum (TM002), September 10, 2018, page 5.
4 Kd - distribution coefficient Remediation will be discontinued when the uranium groundwater concentration reaches the MCL (30 ug/L) .
5 ug - microgram The larger of the following is assumed as initial uranium concentration for estimating the groundwater remediation duration: (1) the maximum representative concentration reported for any well within the remediation area L- liter (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 gpm - gallons per minute 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 gpd - gallons per day aqueous-phase contaminant concentrations will be variable.
6 DCGL - derived cleanup goal leve l Number of pore vol umes assumes linear, reversible and instantaneous sorption, and may result in an underestimation of cleanup timeframe estimates.
7 MCL - maximum contam inant level Flow rate is based on the nominal groundwater recovery rate for extraction we ll 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)
R = l + f!.E K c.
Table 1: Retardation Calculation n Bulk Density Nitrate Kd 1
(g/ml) Porosity .l!!J. ~lfg'2 Retardation IBl 1.81 0.11 0.6 10.87 Table 2: Remediation Pore Volume Calculation Bulk Saturated Plume 3
Volume [V] Pore Volume (tt3) Pore Volume [PV]
1 (tt3) Porosity [n] [PV = V*n] (gallons) 27,396 0.11 3,014 22,541 Table 3: Estimated Initial Agueous-Phase Contaminant Concentration Initial Aqueous-Phase Contaminant Concentration Concentration Basis (mg/L) Remarks Incremental Averaging of Concentrations w ithin 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)
Nitrate Cleanup Initial Aqueous-Phase Concentration Contaminant Concentration 6 No. of Pore Volumes 4
R (mg/L) (mg/L)s [#PV = -R ln(Cleanup/lnitial)] Remarks Pore volumes required to achieve cleanup goal and discontinue 10.87 22.9 43 6.9 remediation Pore Volume Flow Rate Flow Rate Duration Estimate No. of Pore Volumes (gallons) (gpm)1 (gpd) Duration Estimate (days) (months) Remarks Time to achieve cleanup goal and 6.9 22,541 8 11,520 13 0.5 discontinue re mediation.
Definitions: Notes:
1 ml - milliliters Assumes 11% transmissve porosity for BAl transition zone, as presented in Environmental Sequence Stratigraphy {ESS} and Porosity Analysis, Burial Area 1, dated April 6, 2018.
2 g-gram Kd derived from previous studies as mentioned in the Technical Memorandum (TM002), September 10, 2018, page 4.
3 ft3 - cubic feet Plume volume calculated using Earth Volumtric Studio. Includes saturated volume of transition zone and Sandstone B form ations within combined capture zone of extraction trenches GETR-BA-01 and GETR-BAl-02, Kd - distribution coefficient located within area of uranium groundwater contamination exceeding 30 ug/L.
4 ug - microgram Remediation will be discontinued when the nitrate groundwater concentration reaches the ACL (22.9 mg/L) .
5 L- liter The 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 gpm - gallons per minute 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 gpd - gallons per day 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 DCGL - derived cleanup goal level Calcs_Rev. C (09-05-18).xlsx ). Initial aqueous-phase contaminant concentrations will be variable.
6 ACL - alternative contaminant level Number of pore volumes assumes linear, reversible and instantaneous sorption, and may result in an underestimation of cleanup t imeframe estimates.
7 Flow 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 req uired to remediate plumes via groundwater injection and extraction. Estimat es 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 R =t +~Ka Table 1: Retardation Calculation n Uranium Kd
,. --------*~--*... ~ ...
Bulk Density 1
(s/ml) Porosity [n] (mlfg)2 Retardation IBJ.
1.81 0.11 50.36 Ta ble 2: Remediation Pore Volume Calculation Bulk Saturated Plume Volume [V]
3 3 Pore Volume (ft ) Pore Volume [PV]
1 (ft3) Porosity [n] [PV=V*n] (gallons) 27,396 0.11 3,014 22,541 Table 3: Estimated Initial Aqueous-Phase Contaminant Concentration Initial Aqueous-Phase Contaminant Concentration Concentration Basis (ug/L) Remarks Incremental Averag ing of Concentrations within Remediation Area 248.49 Average uranium concentration Maximum Representative Concentration with in Remediation Area 526.60 Represent ative 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 Volumes 6
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 remedia tio n
~::,
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 Pore Volume Flow Rate Flow Rate Duration Estimate u
~ No. of Pore Volumes (gallons) (gpm)7 (gpd) Duration Estimate (days) (months) Remarks Time to achieve cleanup goal (MCL) and 144.3 22,541 8 11,520 282 9.3 discontinue remediation.
Definitions: Notes:
1 ml-milliliters Assumes 11% transmissve porosity for BA1 transition zone, as presented in Environmental Sequence Stratigraphy (ESS) and Porosity Analysis, Buria l Area 1 , dated April 6, 2018.
2Kd derived from previous studies as mentioned in the Technical Memorandum (TM002), September 10, 2018, page 4.
g-gram 3 3 ft - cubic feet Plume vo lume calculated using Earth Volumtric Studio. Includes saturated volume of transition zone and Sandstone B formations with in co mbined capture zone of extraction trenches GETR-BA-01 and GETR-BAl-02, located Kd - distribution coefficient within area of uranium groundwater contamination exceeding 30 ug/L.
ug - microgram 4
pCi/L - picocuries per liter Remediation will be discontinued when the uranium groundwater concentration reaches 119 ug/L, the equivalent of 180 pCi/L as calc uated in Uran ium Activity vs. Mass Concentrotion_Rev. A (07-30-18).xlsx, and 30 ug/L.
5 L- liter The larger of the following is assumed as initial uranium concentration for estimating the groundwater remediation duration : (1) the maximum representative concentration reported for any well within the remed iation area gpm - gallons pe r minute (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.
gpd - gallons per day 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 DCGL - derived cleanup goal level 18).xlsx ). Initial aqueous-phase contaminant concentrations will be variable.
6 MCL - maximum contaminant level Number of pore volumes assumes linear, reversible and instantaneous sorption, and may result in an underestimation of cleanup timeframe estimates.
7 Flow rate is based on the nominal 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 collect ed during the early stages of remedial operations.
Remediation and Water Treatment Duration Estimate Calculations WU-1348 (SSA)
R = 1+ p °Ka Table 1: Retardation Calculation *n Bulk Density Nitrate Kd 1
(g/ml) Porosity [n] (ml/g)2 Retardation [R]
1.81 0.1 0.6 11.86 Table 2: Remediation Pore Volume Calculation Average Plume 3
Area of Plume [A] Thickness [b] Pore Volume (ft3) Pore Volume [PV]
1 (ft2) Porosity [n] (ft) [PV = b*n*A] (gallons) 44,143 0.1 14 61,800 462,265 Table 3: Estimated Initial Aqueous-Phase Contaminant Concentration Initial Aqueous-Phase Contaminant Concentration Concentration Basis (ug/L) Remarks Incrementa l 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 6
Concentration Concentration No. of Pore Volumes 4 5 R (ug/L) (ug/L) [#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)
Pore Volume Flow Rate Flow Rate Duration Estimate No. of Pore Volumes (gallons) (gpm)7 (gpd) Duration Estimate (days) (months) Remarks Time to achieve cleanup goal (ACL) and 0.0 462,265 4 5,760 0 0.0 discontinue remediation.
Definitions: Notes:
1 ml - milliliters Assumes 30% transmissve porosity for alluvial sand, as presented in the Technical Memorandum (TM002), September 10, 2018, page 3.
2 g- gram Kd derived from previous studies as mentioned in the Technical Memorandum (TM002), September 10, 2018, page 4.
3 3 ft - cubic feet Saturated zone thickness assumed to be 14 feet, as presented in the Technical Memorandum (TM002), September 10, 2018, page 5.
4 Kd - distribution coefficient Remediation will be discontinued when the nitrate groundwater concentration reaches the ACL (22.9 mg/L) .
5 ug - microgram The larger of the following is assumed as initial nitrate concentration for estimating the groundwater remediation duration : (1) the maximum representative L - liter concentration reported for any well within the remediation area (determined using sampling results for monitoring events conducted from 2011 through Q2 2017), (2) gpm - gallons per minute the concentration estimated by conducting incremental averaging of concentrations within the specified treatment area. The incremental averaging is performed using gpd - gallons per day isopleth contours developed using representative groundwater concentrations for monitor wells located within the remediation area (see Iner. AWCA Calcs_Rev. C {09-DCGL - derived cleanup goal level 05-18}.xlsx ). Initial aqueous-phase contaminant concentrations will be variable.
6 ACL - alternative contaminant level Number of pore volumes assumes linear, reversible and instantaneous sorption, and may result in an underestimation of cleanup timeframe estimates.
7 Flow rate is based on the nominal 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 Pb R = 1+- Ka Table 1: Retardation Calculation n.
Bulk Density Uranium Kd 1 2 (g/ml) Porosity [n] (ml/g) Retardation [R]
1.81 0.1 Table 2: Remediation Pore Volume Calculation 3
Average Plume 3 3
~ .. .,
55.30 ~
~ /
//
'/
l/ / /
.(
\ *t, \ \,
Area of Plume [A] Thickness [b] Pore Volume (ft ) Pore Volume [PV] /
(ft2) 44,143 Porosity [n]
0.1 1
(ft) 14
[PV = b*n*A]
61,800 (gallons) 462,265
\"\"'
Table 3: Estimated Initial Aqueous-Phase Contaminant Concentration Initial Aqueous-Phase Contaminant
~~ \
Concentration Basis Incremental Averagi ng of Concentrations within Concentration (ug/L) Remarks ~----
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 6
Concentration Concentration No. of Pore Volumes 4 5 R (ug/L) (ug/L) [#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)
-- ~
Pore Volume Flow Rate Flow Rate Duration Estimate No. of Pore Volumes (gallons) (gpm)7 (gpd) Duration Estimate (days) (months) Remarks Time to achieve cleanup goal (MCL) and 47.8 462,265 4 5,760 3,840 126.3 discontinue remediation.
Definitions: Notes:
1 ml - milliliters Assumes 30% transmissve porosity for alluvial sand, as presented in the Technical Memorandum (TM002), September 10, 2018, page 3.
2 g - gram Kd derived from previous studies as mentioned in the Technical Memorandum (TM002), September 10, 2018, page 4.
3 ft3 - cubic feet Saturated zone thickness assumed to be 14 feet, as presented in the Technical Memorandum (TM002), September 10, 2018, page 5.
4 Kd - distribution coefficient Remediation will be discontinued when the uranium groundwater concentration rea ches the MCL (30 ug/L) .
5 ug - microgram The larger of the following is assumed as initial uranium concentration for estimating the groundwater remediation duration: (1) the maximum representative L - liter concentration reported for any well within the remediation area (determined using sampling results for monitoring events conducted from 2011 through Q2 2017), (2) the gpm - gallons per minute concentration estimated by conducting incremental averaging of concentrations within the specified treatment area. The incremental averaging is performed using isopleth gpd - gallons per day contours developed using representative groundwater concentrations for monitor wells located within the remediation area (see Iner. AWCA Calcs_Rev. C {09-05-18).xlsx ).
DCGL - derived clea nup goal level Initial aqueous-phase contaminant concentrations will be variable.
6 MCL - maximum contaminant level Number of pore volumes assumes linear, reversible and instantaneous sorption, and may result in an underestimation of cleanup timeframe estimates.
7 Flow rate is based on the nominal 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)
R = 1 + .P b'f< .
J'l. G Table 1: Retardation Calculation Bulk Density Nitrate Kd 1
(g/ml) Porosity [n] (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] 3 Thickness [b] Pore Volume (ft3) Pore Volume [PV]
1 (ft2) Porosity [n] (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 6 Concentration No. of Pore Volumes 4
R (mg/L) (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)
Pore Volume Flow Rate Flow Rate Duration Estimate No. of Pore Volumes (gallons) (gpm)7 (gpd) Duration Estimate (days) (months) Remarks Time to achieve cleanup goal and 14.2 154,799 8 11,520 191 6.3 discontinue remediation.
0.5 Definitions
Notes:
1 ml - milliliters Assumes 30% transmissve porosity for alluvial sand, as presented in the Technical Memorandum (TM002), September 10, 2018, page 3.
2 g- gram Kd derived from previous studies as mentioned in the Technical Memorandum (TM002), September 10, 2018, page 4.
3 ft 3 - cubic feet Saturated zone thickness assumed to be 5 feet, as presented in the Technical Memorandum (TM002), September 10, 2018, page 5.
4 Kd - distribution coefficient Remediation will be discontinued when the nitrate groundwater concentration reaches the ACL (22.9 mg/L).
5 ug - microgram The larger of the following is assumed as initial nitrate concentration for estimating the groundwater remediation duration: (1) the maximum representative concentration L- liter reported for any well within the remediation area (determined using sampling results for monitoring events conducted from 2011 through Q2 2017), (2) the concentration gpm - gallons per minute estimated by conducting incremental averaging of concentrations within the specified treatment area. The incremental averaging is performed using isopleth contours gpd - gallons per day developed using representative groundwater concentrations for monitor wells located within the remediation area (see Iner. AWCA Calcs_Rev. C {09-05-18).xlsx ). Initial DCGL - derived cleanup goal level aqueous-phase contaminant concentrations will be variable.
6 ACL - alternative contaminant level Number of pore volumes assumes linear, reversible and instantaneous sorption, and may result in an underestimation of cleanup timeframe estimates.
7 Flow rate is based on the nominal 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)
Uranium Table 1: Retardation Calculation R = l + t:..l?.K ,
n "
r--
. .I Bulk Density Porosity l!!J.
1 Uranium Kd (ml/g)2 Retardation IB1
/
~ -------- ~ ~,~ \J(I (g/ml) 1.81 0.1 55.30 Table 2: Remediation Pore Volume Calculation Average Plume
//
/
--- \ "'
Area of Plume [A] Thickness [b) 3 Pore Volume (ft3) Pore Volume [PV) I / / "-,, _,--------- -- -
- ------ -~
1 (ft2) Porosity [n] (ft) [PV = b*n*A] (gallons)
~
( ( r '~,--- -
41,390 0.1 5 20,695 154,799 Table 3: Estimated Initial A_g_ueous-Phase Contaminant Concentration Concentration Basis Initial Aqueous-Phase Contaminant Concentration (ug/L) Remarks
\ \
~ ~>,l\ (_ ~'~, \ ,\\
I ,-"'-*\
- Incremental Averaging of Concentrations within Remediation Area 311 .34 Average uranium concentration Maximum Representative Concentration wit hin 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 6
Concentration Contaminant Concentration No. of Pore Volumes 2l 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
~
C Table Sa: Estimated Time to Achieve Remediation Goal (119 ug/L) 8C No. of Pore Volumes Pore Volume hzallons)
Flow Rate htPml 7
Flow Rate (gpd) Duration Estimate (days)
Duration Estimate (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 C
....I Table Sb: Estimated Time to Achieve Remediation Goal (30 ug/L)
Pore Volume Flow Rate Flow Rate Duration Estimate u
~ No. of Pore Volumes (gallons) (e;pm)1 (e;pd) Duration Estimate (days) (months) Remarks Time to achieve cleanup goal (MCL) and discontinue 186.5 154,799 8 11,520 2,506 82.4 remediation.
6.9 Definitions
Notes:
1 ml-milliliters Assumes 30% transmissve porosity for alluvial sand, as presented in the Technical Memorandum (TM002), September 10, 2018, page 3.
2 g-gram Kd derived from previous studies as mentioned in the Technical Memorandum (TM002), September 10, 2018, page 4.
3 3 ft - cubic feet Saturated zone thickness assumed to be 5 feet, as presented in the Technical Memorandum (TM002), September 10, 2018, page 5.
Kd - distribution coefficient 4 Remediation will be discontinued when the uranium groundwater concentration reaches 119 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.
ug - microgram 5
pCi/L - picocuries per liter The larger of the following is assumed as initial uranium concentration for estimating the groundwater remediation duration: (1) t he maximum representative concentration reported for any well within the remediation area L- liter (determined using sampling results for monitoring events conducted from 2011 through Q2 2017), (2) the concentration estimated by conducting incremental averaging of concentrations within the specified treatment area .
gpm - ga llons per minute 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 gpd - gallons per day 18}.xlsx ). Initial aqueous-phase contaminant concentrations will be variable.
6 DCGL - derived cleanup goal level Number of pore volumes assumes linear, reversible and instantaneous sorption, and may result in an underestimation of cleanup timeframe estimates.
7 MCL - maximum contaminant level Flow 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 05/25/2017 CONCENTRATION CALCULATION
SUMMARY
Rev.C Cimarron Environmental Response Trust Influent Flow Adjusted Weighted Weighted Weighted Remediation Extraction Rate Flow Rate Nitrate Uranium Fluoride Nitrate Uranium Fluoride Area Well/Trench (aom) /aom) (mQ/L) (UQ/L) (mg/L) (mg/L) (ug/L) (mQ/L) q q*% Cmax q*Cmax Comments:
Governing Assumptions:
- 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 Western Area 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).
WU "1206 NORTH" GETR-WU-02 - Linear, incremental concentration averaging along trench alignment using 8 -- 38 .6 304 7.03 309.12 2428.36 56.26 isoconcentration contours [see Iner. AWCA Cales Rev. B (08-15-18)].
WU-PBA GE-WU-01 - Interpolated concentrations calculated in Surfer [see Iner. AWCA Calcs_Rev.
5 -- 61 .7 29.0 0.32 308.65 145.10 1.58 B (08-15-1811.
WU "1206 SOUTH" GETR-WU-01 - Linear, incremental concentration averaging along trench alignment using 4 -- 10.14 62.0 1.00 40.57 247.90 4.01 isoconcentration contours [see Iner. AWCA Cales Rev. B (08-15-18)1.
GE-WAA-01 - Interpolated concentrations calculated in Surfer (see Iner. AWCA Calcs_Rev.
25 -- 25.3 134 1.40 632.75 3354.50 35.00 B (08-15-18)].
- Interpolated concentrations calculated in Surfer [see Iner. AWCA Calcs_Rev.
GE-WAA-02 WAA "U>DCGL" 30 -- 29.0 163 2.62 869.40 4903 .20 78.60 B (08-15-1811.
- Interpolated concentrations calculated in Surfer (see Iner. AWCA Calcs_Rev.
GE-WAA-03 24 -- 67.1 163 3.41 1610.88 3908.40 81.84 B (08-15-18)].
- Interpolated concentrations calculated in Surfer (see Iner. AWCA Calcs_Rev.
GE-WAA-04 20 -- 21.4 119 1.44 427.40 2380.60 28 .80 B (08-15-18)].
- Interpolated concentrations calculated in Surfer [see Iner. AWCA Calcs_Rev.
WAA "U<DCGL" WEST GE-WAA-05 10 -- 10.2 58.6 0.45 102.40 586.40 4 .50 B (08-15-1811.
- Initial Influent Concentration: [SSB/TZ/Alluvium] interpolated concentrations calculated in Surfer [see Iner. AWCA Calcs_Rev. B (08 -- 90.8 64 .0 3.26 1180.79 832.39 42.38 18)1 GE-WAA-06 13
- Maximum Influent Concentration: [SSA] UP1 area-weighted incremental concentration averaging using isoconcentration contours [see Iner. AWCA 204 15.6 18.8 2652 .00 202 .80 244 .40 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 -- 73 .2 10.9 2 .6 951.99 142.09 33.93 18)1.
GE-WAA-07 13
- Maximum Influent Concentration: [SSA] UP1 area-weighted incremental concentration averaging using isoconcentration contours [see Iner. AWCA 204 15.6 18.8 2652.00 202 .80 244.40 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 -- 141 7.70 3.54 1833.00 100.10 46 .02 18)1 .
GE-WAA-08 13
- Maximum Influent Concentration: [SSA] UP1 area-weighted incremental concentration averaging using isoconcentration contours [see Iner. AWCA 204 15.6 18.8 2652.00 202.80 244.40 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 GE-WAA-09 13
-- 218 4.77 2.46 2829.71 62.01 31.98 18)1.
- Maximum Influent Concentration: [SSA] UP2 area-weighted incremental concentration averaging using isoconcentration contours [see Iner. AWCA 378 26.3 7.80 4914.00 341.90 101.40 Cales Rev. C (08-22-18)].
WAA "BLUFF"
- Initial Influent Concentration: [SSB/TZ/Alluvium] interpolated concentrations calculated in Surfer [see Iner. AWCA Calcs_Rev. B (08 GE-WAA-10 13
-- 207 6 .40 2 .03 2692.43 83.20 26.39 18)].
- Maximum Influent Concentration: [SSA] UP2 area-weighted incremental concentration averaging using isoconcentration contours (see Iner. AWCA 378 26.3 7 .80 4914.00 341 .90 101.40 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 GE-WAA-11 14
-- 128 6.80 1.76 1794.94 95.20 24.64 18)1.
- Maximum Influent Concentration: [SSA) UP2 area-weighted incremental concentration averaging using isoconcentration contours (see Iner. AWCA 378 26.3 7.80 5292.00 368.20 109.20 Cales Rev. C /08-22-1811.
- Initial Influent Concentration: [SSB/TZ/Alluvium) interpolated concentrations calculated in Surfer (see Iner. AWCA Calcs_Rev. B (08 -- 24.5 5.48 0.92 318.24 71 .24 11 .96 18)1.
GE-WAA-12 13
- Maximum Influent Concentration: [SSA] UP2 area-weighted incremental concentration averaging using isoconcentration contours [see Iner. AWCA 378 26.3 7.80 4914.00 341.90 101 .40 Cales Rev. C /08-22-1811
- Initial Influent Concentration: [SSB/TZ/Alluvium) interpolated concentrations calculated in Surfer [see Iner. AWCA Calcs_Rev. B (08 -- 22.1 8.15 0.84 265.32 97.80 10 .08 18)1 GE-WAA-13 12
- Maximum Influent Concentration: [SSA) UP2 area-weighted incremental concentration averaging using isoconcentration contours [see Iner. AWCA 378 26.3 7.80 4536.00 315.60 93 .60 Cales Rev. C (08-22-18)1
- Interpolated concentrations calculated in Surfer (see Iner. AWCA Calcs_Rev.
GE-WAA-14 10 WAA "U<DCGL" EAST
-- 79.1 61.9 0.46 791.00 619.00 4 .60 B (08-15-18)1 .
- Interpolated concentrations calculated in Surfer [see Iner. AWCA Calcs_Rev.
GE-WAA-15 10
-- 65.4 40.4 0.43 653.50 403 .60 4.30 B /08-15-18)1.
Initial Iq*Cmax 250 0 17612 20461 526.9 Initial Iq 250 250 250 Initial Influent Concer 70.4 81 .8 2.11 Governing Assumptions:
Burial Area 1 - Maximum uranium influent concentrations for all extraction wells and trenches will occur at time zero.
- Linear, incremental concentration averaging along trench alignment using AREA A GETR-BA 1-01 7 -- -- 1,360 -- -- 9,520.00 -- isoconcentration contours (see Iner. AWCA Cales Rev . A (07-31-18) .
- Linear, incremental concentration averaging along trench alignment using GETR-BA 1-02 7 -- -- 2,080 -- -- 14,560.00 -- isoconcentration contours (see Iner. AWCA Cales Rev . A (07-31-18)
- Interpolated concentrations calculated in Surfer [see Iner. AWCA Calcs_Rev.
GE-BA1-02 24 -- -- 2,420 -- -- 58,080.00 -- B (08-15-18)1 AREAS - Interpolated concentrations calculated in Surfer [see Iner. AWCA Calcs_Rev.
GE-BA1-03 18 -- -- 430 -- -- 7,740.00 -- B (08-15-18)]
- Interpolated concentrations calculated in Surfer [see Iner. AWCA Calcs_Rev.
GE-BA1-04 24 -- -- 389 -- -- 9,336.00 -- B (08-15-1811
- Interpolated concentrations calculated in Surfer [see Iner. AWCA Calcs_Rev.
GE-BA1-05 0 -- -- 168 -- -- 0 .00 -- B (08-15-18)1
- Interpolated concentrations calculated in Surfer (see Iner. AWCA Calcs_Rev.
GE-BA1-06 0 -- -- 88 .6 -- -- 0.00 -- B (08-15-18)1.
- Interpolated concentrations calculated in Surfer (see Iner. AWCA Calcs_Rev.
AREAC GE-BA1-07 0 -- -- 43.3 -- -- 0.00 -- B (08-15-18)1.
- Interpolated concentrations calculated in Surfer [see Iner. AWCA Calcs_Rev.
GE-BA1-08 10 -- -- 32 .1 -- -- 321 .00 -- B (08-15-18)1
- Interpolated concentrations calculated in Surfer [see Iner. AWCA Calcs_Rev.
GE-BA1-09 10 -- -- 37.2 -- -- 372.00 -- B (08-15-18)) .
Iq*cmax 100 99929 .00 Lq 100 MaxlnfluentConcen 999 Notes:
SSA - Sandstone A SSA - Sandstone B TZ - Transition Zone gpm - gallons per minute ug/L - micrograms per liter mg/L- milligrams per liter Page 1 of 1 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.
BA1 Uranium Concentration Trends Combined Influent 2000 . IJ 1
- h'EIGHTED AVERAGE 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
---+-I~I~:--
I 200 .0 I
- 0. 0 M on th s fr om Treatment Start
BA 1 - Uranium Time Required for Is C; Time Required for Combined Combined Influent representative Initial Cone. to Reach Influent Cone. to Reach C; C; Cmax Cmax of Cmax? Flow Rate PV" PV Q Max. Level Cr c, MCL Remediation Area (ug/L) Source (ug/L) Source (YIN) (gpm) R4 (ft3) (liters) (liters/day) (days) (ug/L) (ug/L) (months)
BA1-A1 (GETR-BA1-01 & GETR-BA1-02) 1720 FWCA 1720 FWCA y 14 50.4 90,021 2,549,098 76,314 0 114 BA1-B1 (GE-BA1-02 through GE-BA1-04) 1139 FWCA 1139 FWCA y 66 13.1 619,099 17,530,908 359,765 0 556 BA1-B2 (GE-BA1-02 through GE-BA1-04) 556 FWCA 1 556 FWCA 1 y 66 13.1 0 0.0 BA1-B3 (GE-BA1-02 through GE-BA1-04) 16.0 116 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) cubic foot= 28.3168 liters C -(
t- oe
(-Q/(PV*R))t gpm 5451 liters per day Notes:
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 1
1nitial concentration for Area B2 equals final concentration for Area B1.
2 1nitial concentration for Area B3R equals final concentration for Area B2.
3 1nitial 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.
4 Retardation (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 & BA1.C2 (GE-BA1-06 &
Area & GETR-BA1-02 throu h GE-BA1-04 throu h GE-BA1-04 OU h GE-BA1-04 GE-BA1-09 GE-BA1-07 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
C -c (-Q/(PV*R))t (liters/day) 76,314 359 ,765 468,785 109 ,020 c oe Time Required for Initial Cone. to Reach Mn. Level months 0 Months Da s Months IIIDDI IIID1DII Months Da s Cumulative Time (Months) 0 A
1720.000000 B
1138.727273 B2 B3R C1 34.650000 C2 WEIGHTED AVERAGE 999.29 100 for A1/B1/C1 Areas 0 0 .0 for 83R Aea 1--~---,--~--l Notes 1 1689.199612 1085 .602640 33.431728 959.67 100 1 30.4 2 1658.950773 1034.956411 32 .256290 921.78 100 2 60.8 1629.243606 986 .672962 31.122180 885.52 100 3 91.3 4
5 1600.068411 1571.415663 940.642064 896 .758629 30.027944 28.972181 850 .84 817.65 100 100 4
5 121 .7 152.1 1543.276005 854.922472 27.953538 785.90 100 6 182.5 1515.640249 815.038082 26.970710 755.51 100 7 212.9 1488.499373 777.014404 26.022437 726.42 100 8 243.4 1461.844513 740.764631 25.107505 698.58 100 9 273.8 10 1435 .666968 706.206006 24.224741 671.93 100 10 304.2 11 1409.958189 673 .259631 23.373015 646.42 100 11 334.6 12 13B4.7097B3 641.850292 22.551235 621.99 100 12 365.0 13 1359.913505 611.9062B2 21.758348 598.60 100 13 395.5 14 1335.561259 5B3 .359239 20.993338 576.19 100 14 425.9
~~ 15 1311 .645093 556 .1 43990 ~ ~~- 20.255226 554.74 100 15 456 .3 Ill 16 12B8.157199 530.19 100 16 486.7 I 17 18 19 1265.089908 1242.435687 1220.187140 504.82 480.92 458.40 100 100 100 17 18 19 517.1 547.6 578.0 3
4 91 .3 121 .7
- I 20 1198.337002 437.17 100 20 608.4 5 152.1 I 21 1176.87B139 417,16 100 21 638.8 6 182.5 I 22 1155.803544 398.29 100 22 669.2 7 212.9 I 23 1135.106336 380 .49 100 23 699.7 8 243.4 I 24 1114.779757 363.68 100 24 730.1 9 273.8 I 25 1094.B17171 347.82 100 _ _2 25
_6_ 760.5 10 304.2 I 26 1075.212058 332.85 100 790.S 11 334.6 I 27 1055.958019 318.70 100 27 821 .3 12 365.0 I 28 1037.048765 305.32 100 28 851 .8 13 395.5 29 1018.478123 292.68 100 29 882.2 14 425.9 30 1000.240029 280.73 100 30 912.6 15 456.3 31 982.328529 269.42 100 31 943.0 16 486.7 32 964.737773 258.71 100 32 973.4 17 517.1 33 947.462019 248.57 100 33 1003.9 18 547.6 34 930.495625 238,97 100 34 1034.3 19 578.0 35 913.833051 229.87 100 35 1064.7 20 608.4 36 897.46B858 221.24 100 36 1095.1 21 638.8 II
---*-~
37 8B1.397702 213.05 100 37 1125.5 22 669.2 38 B65.614335 205.28 100 38 1156.0 23 699.7 39 850.113604 197.90 100 39 1186.4 24 730.1 I 40 834.89044B 190.89 100 40 1216.8 25 760.5 I 41 ~ 819.939895 99 .36428523 184.23 100 41 1247.2 26 790.9 I , - - -~- --,---o_ _ o _, According to remediation duration calculations , the uran ium MCL is achieved in Area C2 in 25.4 months .
42 805.257066 89 .43727224 189.65 100 42 1277.6 27 0
3 4 43 44 790.837165 776 .675484 80.50201989 72 .45944609 179.95 171.05 100 100 43 44 1308.1 1338.5 28 29 2
3 60.8 91.3 I
45 762 .767399 65.2203675B 162.88 100 45 1368.9 30 4 121 .7 46 749 .108369 58.70451095 155.36 100 46 1399.3 31 5 152.1 47 735.693934 52 .83962256 148.44 100 47 1429.7 32 6 182.5 4B 722.519714 47 .56066727 142.05 100 48 1460.2 33 7 212.9 49 50 709.581407 696.B747B9 42.80910729 38 .53225305 136.1 6 130.70 100 100 49 50 1490.6 1521 .0 34 35 i I 8
9 243.4 273.8 51 684.395711 34.68267898 125.64 100 51 1551 .4 36 i 10 304.2 52 672.140099 31.21769753 120.95 100 52 1581 .8 37 I 11 334.6 53 660.103950 28.0988859 116.58 100 53 1612.3 38 12 365.0 54 64B .283335 25.29165989 112.51 100 54 1642.7 39 i 13 395.5 55 636 .674395 22.76489049 108.71 100 55 1673.1 40 I 14 425.9 56 625 .273337 20.49055859 105.16 100 56 1703.5 41 I 15 456.3 57 614.076441 18.44344437 101 .83 100 57 1733.9 42 I 16 486.7 58 603.0B0050 16.60084759 98.71 100 58 1764.4 43 i 17 517.1 59 592.280574 14.94233589 95.77 100 59 1794.B 44 18 547.6 60 61 581 .674486 571 .25B323 13.4495182 12.10584083 93.00 90.39 100 100 60 61 1825.2 1855.6 45 46 19 20 57B.O 608.4 I
62 561.0286B5 10.B96403B7 87.91 100 62 18B6.0 47 I 21 63B.B 63 550.9B2231 9.807795999 85.57 100 63 1916.5 48 I 22 669.2 iii,,*
64 According to remediation duration calculations , the uranium MCL is achieved in Area B3R in 22 .6 months; however 541 .115681 B.827945764 83.35 100 64 1946.9 49 ~ -2~3 ~ - ~ 6_ 9_9_.7-=-, groundwater extraction vvill continue in Area B3R to ma intain the minimum treatme nt system flow rate .
65 531.425813 7.945987704 81.23 100 65 1977.3 50 24 730.1 66 521 .909463 7.152141877 79.22 100 66 2007.7 51 I 25 760.5 67 512 .563525 6 .43760541 77.30 100 67 203B.1 52 26 790.9 68 503.3B4946 5.794454882 75.46 100 68 206B.6 53 1111 27 821 .3 69 494.370730 5.215558464 73.70 100 69 2099.0 54 28 851 .8 70 485.517933 4.694496832 72.01 100 70 2129.4 55 I 29 882.2 71 476.823666 4.225491989 70.39 100 71 2159.8 56 I 30 912.6 72 468.285088 3.803343188 68.83 100 72 2190.2 57 31 943.0 73 459.899412 3.423369265 67.33 100 73 2220.7 58 32 973.4 74 451.663900 3.0B1356729 65.88 100 74 2251.1 59 33 1003.9 75 76 443.575863 435.632661 2.773513039 2.496424547 64.49 63.14 100 100 75 76 22B1 .5 2311 .9 60 61 34 35 1034.3 1064.7 I
77 427.831699 2.247018648 61 .83 100 77 2342.3 62 I 36 1095.1 7R 4? n 17n4~[) 2.02252ll705 60.56 100 78 2372.8 63 EllD 37 1125,5 1 of 2
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
-( (-Q/(PV*R))t (liters/day) 76 ,314 359 ,765 468 ,785 109,020 Cc oe Time Required for Initial Cone. to Reach Max. Level months Months Da s Months Months Da s Cumulative Time Combined A B B2 B3R C1 C2 Influent Flow (Months)
AVERAGE Rate for A1/B1 /C1 Areas for 82/C2 Areas for 83R Aea Notes 79 412.646353 1.820468385 59.34 100 79 2403.2 64 38 1156.0 80 405.257011 1.63859405 58.15 100 BO 2433.6 65 39 1186.4 81 397.999992 1.474889915 56.99 100 81 2464.0 66 40 1216.8 82 390.872926 1.32754068 55.86 100 82 2494.4 67 41 1247.2 83 383.873485 1.1 94912407 54.77 100 83 2524.9 68 1277.6 42 84 376.999385 1.075534394 53.70 100 84 2555.3 69 2099 43 1308.1 85 370.248381 0.968082869 52.67 100 85 2585.7 70 2129 44 1338.5 86 363.618268 0.871366316 51 .66 100 86 2616.1 71 2159 45 1368.9 87 357.106882 0.784312253 50.67 100 87 2646.5 72 2190 1399.3 46 88 350.712097 0.70595534 7 49.71 100 88 2677.0 73 222 47 1429.7 89 344.431825 0.635426707 48.77 100 89 2707.4 74 48 1460.2 90 338.264014 0.57 1944248 47.85 100 90 2737.8 75 49 1490.6 91 332.206652 0.5 1480402 46.95 100 91 2768.2 76 50 1521.0 92 326.257761 0.463372399 46.07 100 92 2798.6 - 51 1551.4 93 320.415397 0.417079067 45.22 100 93 2829.1 78 52 158 1.8 94 314.677654 0.375410682 44.38 100 94 2859.5 79 53 1612.3 95 309.042657 0.337905 187 43.56 100 95 2889.9 80 54 1642.7 96 303.508568 0.304146687 42.75 100 96 2920.3 81 55 1673.1 97 298.073578 0.273760839 41.97 100 97 2950.7 82 56 1703.5 98 292.735915 0.246410696 41.19 100 98 2981 .2 83 57 1733.9 99 287.493833 0.221792976 40.44 100 99 3011 .6 84 58 1764.4 100 282.345623 0.199634695 39.70 100 100 3042.0 85 59 1794.8 101 277.289603 0.179690 142 38.98 100 101 3072.4 86 60 1825.2 102 272.324122 0.161738 155 38.26 100 102 3102.8 87 61 1855.6 103 267.447559 0.145579665 37.57 100 103 3133.3 88 267 62 1886.0 104 262.65832 1 0.131 035494 36.88 100 104 3163.7 89 2707 63 1916.5 105 257.954846 0.117944361 36.22 100 105 3194.1 90 2737 64 1946.9 106 253.335596 0.1 06161 101 35.56 100 106 3224.5 91 65 1977.3 107 248.799064 0.095555051 34.91 100 107 3254.9 92 66 2007.7 108 244.343769 0.0860086 34.28 100 108 3285.4 93 67 2038.1 109 239.968256 0.07741589 33.66 100 109 3315.8 94 68 2068.6 110 235.671 096 0.069681637 33.05 100 110 3346.2 95 69 2099.0 111 231.450886 0.062 7200 76 32.46 100 11 1 3376.6 96 70 2129.4 112 227.306248 0.056454012 31.87 100 112 3407.0 97 71 2159.8 113 223.235829 0.05081396 31.30 100 113 3437.5 98 72 21 90.2 114 219.238300 0.045737379 30.73 100 114 3467.9 99 73 2220.7 115 215.312355 0.041167975 30.18 100 115 3498.3 100 74 2251 .1 211.456713 0.037055078 100 116 3528.7 101 3072. 75 2281 .5 117 207.670115 0.033353082 29.10 100 117 3559.1 102 76 2311 .9 118 203.951325 0.030020934 28.58 100 118 3589.6 103 77 2342.3 119 200.299127 0.027021685 28.07 100 119 3620.0 104 78 2372.8 120 196 .712330 0.024322077 27.56 100 120 3650.4 105 79 2403.2 121 193 .189762 0.021892174 27.07 100 121 3680.8 106 BO 2433.6 122 189 .730274 0.019705031 26.58 100 122 3711 .2 107 81 2464.0 123 186.332736 0.017736395 26.10 100 123 3741 .7 108 82 2494.4 124 182.996038 0.015964437 25.63 100 124 3772.1 109 83 2524.9 125 179.719091 0.014369506 25.17 100 125 3802.5 110 84 2555.3 126 176.500825 0.012933917 24.72 100 126 3832.9 111 85 2585.7 127 173.340189 0.011641751 24.28 100 127 3863.3 112 86 2616.1 128 170.236151 0.010478679 23.84 100 128 3893.8 113 87 2646.5 129 167.187698 0.009431804 23.41 100 129 3924.2 114 88 2677.0 130 164.193834 0.008489517 22.99 100 130 3954.6 115 89 2707.4 131 16 1.253582 0.00764 137 22.58 100 131 3985.0 116 90 2737.8 132 158.365981 0.006877957 22.18 100 132 4015.4 117 91 2768.2 133 155.530090 0.006190813 21.78 100 133 4045.9 118 92 2798.6 134 152.744981 0.005572318 21.39 100 134 4076.3 119 93 2829.1 135 150.009746 0.005015615 21.01 100 135 4106.7 120 94 2859.5 136 147.323491 0.004514528 20.63 100 136 4137 .1 121 95 2889.9 137 144.685339 0.004063503 20.26 100 137 4167.5 122 96 4920.3 138 142.094430 0.003657538 19.90 100 138 4198.0 123 97 2950.7 139 139.549916 0.003292 131 19.54 100 139 4228.4 124 98 2981.2 140 137.050967 0.00296323 19.19 100 140 4258.8 125 99 3011 .6 141 134 .596768 0.002667187 18.85 100 141 4289.2 126 100 3042.0 142 132.186516 0.002400721 18.51 100 142 4319.6 127 101 3072 .4 143 129.819426 0.002160877 18.18 100 143 4350.1 128 102 3102.8 144 127.494723 0.001944994 17.85 100 144 4380.5 129 103 3133.3 145 125.211649 0.001750679 17.53 100 145 4410.9 130 104 3163.7 146 122.969459 0.001575777 17.22 100 146 4441 .3 131 105 3194.1 147 120.767420 0.001418348 16.91 100 147 4471.7 132 106 3224.5 148 118.604813 0.001276648 16.61 100 148 4502.2 133 107 3254.9 149 116.480933 0.001149104 16.31 100 149 4532.6
~. 150 t . 11 4.395085 0.00 1034303 16.02 100 150 4563.0 134 135 108 109 3285.4 3315 .8 According to remediation duration calculations, the uran ium MCL is achieved in Area A in 149 .1 months . ,,
2 of2 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.
Western Area Uranium Concentration Trends Combined Influent 350 .0 , I I
I I ' I j i I I I I I
! I I I I ' I I - wF IGHTFD AV ERA GE I - wuPBA I
- WU -1348 I
I I
300.0 - WAAU>DCGL .
1 I 1206--NO RTH I I
I WAA-WEST WAA-Bl.LIFF I
I '
I
- WAA-EAST t I I I ! I 250 .0 l
Uranium Concentrat ion - Combined Influent Month 0: 81.8 ug/L Month 50: 48 .5 ug/L t- I I
Month 100: 31.6 ug/L Month 150: 20.8 ug/L I
l I
~ 200 .0 C
-Q
~C I
V u
C u
0 I
E i
- i
~ 150.0 I
I
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' r--..... r----.
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......... r......... ....__
100.0 -*- **-
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I 50.0
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I 00 Months from Treatment Start 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.
Western Area Nitrate Concentration Trends Combined Influent 350.0 I I II I I
I I I I I I !
I I - WEIGHTED AVERAGE I I I I
- wu-PBA 300.0
~* -...
I - wU-1348
\
I
- WAAU>DCGL I
I\ I 1206-IIIORTH WAA-WEST I
I 250.0 I\~ I - WM-BLUFF i
l
~ I - WAA-1-.ASI
~
i I !
I I I I l t
~ I I I Nit rate Concentration - Combined Influent I
' I I I
~~
Month 0: 70.5 mg/L !
-::;- Month 50: 72.4 mg/L I
01! 200.0 Month 100: 30.2 mg/L 2..
2 Month 150: 13.3 mg/L l
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V u ~ i I I
I I l I
~
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u 0 I I
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~ 150.0 - ---
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0.0
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Months from Treat ment Start
WATF - Uranium Time Required for Is C; Time Required for Combined Combined Influent representative Initial Cone. to Reach Influent Cone. to Reach Pv1,2,J Max. Level c, c, C; C; Cmax Cmax ofCma,? Flow Rate PV Q MCL Remediation Area (ug/L) Source (ug/L) Source (YIN) (gpm) R1 (ft3) (liters) (liters/day) (days) 2 (ug/L) (ug/L) (months)
~U-PBA (GE-WU-01) 29.0 SIC 29.0 SIC y 5 110 231 ,264.20 6,548,662.10 27 ,254.95 0 24.4 WU-1348 (GETR-WU-01) 62.0 LWCA 62.0 LWCA y 4 55.3 61 ,800.20 1,749,983.90 21,803.96 0 26.0 WAA U>DCGL (GE-WAA-01 through GE-WAA-04) 147 FWCA 147 FWCA y 99 13.1 4,177,558 .50 118,295,088.53 539 ,648.05 0 29.9 1206-NORTH (GETR-WU-02) 304 LWCA 304 LWCA y B 50.4 3,013.56 85 ,334.38 43 ,607.92 0 13.9 20.8 107
~AA-WEST (GE-WAA-05) 58.6 SIC 58.6 SIC y 10 13.1 2,387 ,058.00 67,593,843 .97 54,509.90 0 44.2
~AA-BLUFF (GE-WAA-06 through GE-WAA-13) 14.27 FWCA 22.29 AWCA/FWCA N 104 13.1 6 ,811 ,932.00 192,892 ,1 16.06 566 ,903.00 365 8.7 WAA-EAST (GE-WAA-14 & GE-WAA-15) 51.1 FWCA 51.1 FWCA y 20 13.1 4,716 ,356.70 133,552,129.40 109,019.81 0 38.4 Combined Treatment System Influent Flow Rate" 250 WATF - Nitrate Time Required for Is C 1 Time Required for Combined Combined Influent representative Initial Cone. to Reach Influent Cone. to Reach C;4 4 pv1,Z,3 Max. Level c, c, C; Cma, Cma, of Cma,? Flow Rate PV Q MCL Remediation Area (mg/L) Source (mg/L) Source (YIN) (gpm) R1 (ft3) (liters) (liters/day) (days) 2 (mg/L) (mg/L) (months)
WU-PBA (GE-WU-01) 61.7 SIC 61.7 SIC y 5 22.7 231,264 6,548,662 27,255 0 26.8 WU-1348 (GETR-WU -01) 11.6 - 11.6 - y 4 11.9 61,800 1,749,984 21 ,804 0 0.20 WAA U>DCGL (GE-WAA-01 through GE-WAA-04) 35.8 FWCA 35.8 FWCA y 99 4.62 4,177,559 118,295,089 539 ,648 0 0.40 1206-NORTH (GETR-WU-02) 38.6 LWCA 38.6 LWCA y 8 10.9 3,014 85,334 43,608 0 0.00 13.27 ----
WAA-WEST (GE-WAA-05) 10.2 - 10.2 - y 10 4.62 2,387 ,058 67 ,593,844 54,510 0 4.61 h -
WAA-BLUFF (GE-WAA-06 through GE-WAA-13) 114 FWCA 313 AWCA/FWCA N 104 - - -
4.62 6,811 ,932 192,892,1 16 566 ,903 365 22 WAA-EAST (GE-WAA-14 & GE-WAA-15) 72.2 FWCA 72.2 FWCA y 20 4.62 4,716,357 133,552,129 109,020 0 32.3 Combined Treatment System Influent Flow Rate* 250 WATF - Fluoride Is C1 representative C; C; Cma, Cma, of Cma,?
Remediation Area (mg/L) Source (mg/L) Source (Y/N)
WU-PBA (GE-WU-01) 0.32 SIC 0.32 SIC y WU-1348 (GETR-WU-01) 1.00 LWCA 1.00 LWCA y WAA U>DCGL (GE-WAA-01 through GE-WAA-04) 2.27 FWCA 2.27 FWCA y 1206-NORTH (GETR-WU-02) 7.03 LWCA 7.03 LWCA y WAA-WEST (GE-WAA-05) 0.45 SIC 0.45 SIC y WAA-BLUFF (GE-WAA-06 through GE-WAA-13) 2.19 FWCA 11 .93 AWCA/FWCA N
~AA-EAST (GE-WAA-14 & GE-WAA-15) 0.45 FWCA 0.45 FWCA y cubic foot= 28.3168 liters Ct--( (-Q/(PV*R))t gpm = 5451 liters per day oe Notes:
C 1 - 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 1Retardation (R) and pore volume (PV) taken from remediation duration estimate calculations [DRAFT_Remediation Duration Estimates_Rev. B (09-10-1 B).xlsx].
2 Based 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.
3 The WAA "BLUFF" pore voluem is inconsequential for remediation duration since the remediation timeframe for this area is predicated on UP1/UP2 remediation timeframe.
4 Since 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 .
5 The 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-BLUFF (GE-WAA-WAA-WEST (GE-WAA- WU-1348 (GETR-WU- WAA-EAST (GE-WAA- 1206-NORTH (GETR-WU-PBA (GE-WU-01) WAA-01 through GE- 06 through GE-WAA-
- 05) 01) 14 & GE-WAA-15) WU-02)
Area WAA-04l 131 C;
lug/L) 29.02 146.94 58.64 61.98 51.13 14.27 303.55 Cm.,
luo/Ll 29.02 146.94 58.64 61.98 51.13 22.29 303.55 Flow Rate (opm) 5 99 10 4 20 104 8 R 109.6 13.1 13.1 55.3 13.1 13 .1 50.4 PV (liters) 6,548,662 118,295,089 67,593,844 1,749,984 133 ,552,129 192,892,116 85,334 C -c Q
(litersldav) 27,255 539,648 54,510 21,804 109,020 566,903 43,608 t- oe (-Q/(PV*R))t Time Required for Initial Cone. to Reach Max. Level (months) 0 0 0 0 0 365 0 Cumulative Time (Months)
WU..PBA WAAU>DCGL WAA-WEST WU-1348 WAA-EAST WAA-BLUFF 1206-NORTH II Combined WEIGHTED Influent Flow AVERAGE Rate Months Davs Notes 0 29.020000 146.936364 58.640000 61.975537 51.130000 14.269519 303.545455 81.84 250 0 0.0 1 28.986497 145.384107 58 .530011 61 .552218 51.032924 14.172219 222.932518 78.59 250 1 30.4 2 28 .953032 143.848249 58 .420228 61 .131790 50.936032 14.075583 163 .728058 76.03 250 2 60.8 3 28.919606 142.328616 58 .310652 60.714234 50.839324 13.979605 120.246598 73.97 250 3 91 .3 4 28.886219 140.825037 58 .201281 60.299529 50.742800 13.884282 88.312562 72.30 250 4 121 .7 5 28.852870 139.337341 58.092114 59.887658 50.646459 13 .789608 64.859287 70.90 250 5 152. 1 6 28.819559 137.865362 57.983153 59.478599 50.550301 13.695581 47.634527 69.71 250 6 182.5 7 28 .786287 136.408933 57.874396 59.072335 50.454326 13.602 194 34.984168 68.67 250 7 2 12 .9 8 28.753054 134.967890 57.765843 58.668845 50.358533 13.509444 25.693380 67.74 250 8 243.4 9 28.719859 133.542070 57.657494 58.268112 50.262921 13.417327 18.869958 66.90 250 9 273.8 According to remediation duration calculations for 1206 North , uranium and nitrate remediation goals (NRC and State Criteria) are both met at 9.3 months ;
10 however 1206 North groundwater extractio n will continue until water inje ction in WU-BA3 is discontinued in Month 83.
28 .686702 132 .131313 57. 549348 57.870116 50.167491 13.325838 13.858640 66.13 250 10 304 .2 11 28.653583 130.735459 57.44 1405 57.474838 50.072243 13.234973 10.178184 65.40 242 11 334.6 12 28.620503 129.354351 57.333664 57 082260 49.977175 13.144727 7.475151 84.71 242 12 365 .0 13 28.587461 127.987834 57.226125 56.692364 49.882288 22.287500 5.489966 67.89 242 13 395 .5 14 28.554457 126.635753 57.118788 56.30513 1 49.787581 22.135527 4.031989 67.22 242 14 425 .9 15 28.521491 125.297955 57.011653 55.920543 49.693053 21.984591 2 .961209 66.58 242 15 I 456 .3 16 28.488563 123.974290 56.904718 55.538581 49.598705 21.834684 2 .174797 65.95 242 16 I 486 .7 17 28.455673 122.664608 56.797984 55.159229 49 .504537 21 .685799 1.597234 65.33 242 17 517.1 18 28.422822 121.368762 56.69 1450 54.782468 49.410547 21.537929 1.173054 64.72 242 18 I 547.6 19 28.390008 120.086605 56.585116 54.408280 49.316735 21.391 068 0.861525 64.13 242 19 578 .0 20 28.357232 118.817993 56.478981 54.036648 49 .223102 21 .245208 0.632729 63.54 242 20 I 608 .4 21 28.324493 117.562783 56.373045 53.667555 49.129646 21.100343 0.464694 62.96 242 21 638.8 22 28.291793 116.320834 56.267309 53.300982 49.036368 20.956465 0.341285 62.38 242 22 669.2 23 28.259130 115.092004 56.161770 52.936914 48.943267 20.813568 0.250649 61.82 242 23 699.7 24 28.226506 113.876156 56 .056429 52 .575332 48.850343 20.671646 0.184084 61.26 242 24 730.1 25 28.193918 112.673152 55 .951286 52.216220 48.757595 20.530692 0.135197 60.70 242 25 760.5 26 28.161369 111.482857 55.846340 51.859561 48.665023 20.390698 0.099292 60.15 242 26 790.9 27 28.128857 110.305137 55.741592 51.505338 48 .572627 20.251660 0.072923 59.61 242 27 821 .3 28 28.096382 109.139858 55.637039 51.153534 48.480406 20.113569 0.053557 59.07 242 28 851 .8 29 28.063945 107.986889 55.532683 50.804133 48.388361 19.976420 0.039334 58.54 242 29 882 .2 30 28.031545 106.846100 55.428522 50.457119 48 .296490 19.840206 0.028888 58.01 242 30 912 ,6 31 27.999183 105.717363 55.324557 50.112476 48.2 04794 19.704921 0.021216 57.49 242 31 943.0 32 27.966858 104.600550 55.220786 49.770186 48.113271 19.570558 0.015582 56.98 242 32 973.4 33 27.934571 103.495535 55.117211 49.430234 48 .021923 19.437112 0.011444 56.47 242 33 1003.9 34 27.902321 102.402194 55.013829 49.092604 47.93 0748 19.304575 0.008405 55.96 242 34 1034.3 35 27.870108 101 .320403 54.910642 48.75728 1 47.839746 19.172942 0.006173 55.46 242 35 1064.7 36 27.837932 100.250040 54.807648 48.424248 47.748917 19.042207 0.004533 54.96 242 36 1095.1 37 27.805793 99.190984 54.704847 48.093489 47.658260 18.912364 0.003329 54.47 242 37 1125.5 38 27.773692 98.143117 54.602239 47.764990 47.567776 18.783405 0.002445 53.99 242 38 1156.0 39 27.741627 97.106319 54.499824 47.438735 47.477463 18.655326 0.001796 53.51 242 39 1186.4 40 27.709600 96.080474 54.397601 47.114708 47.387321 18.528120 0.001319 53.03 242 40 1216.8 41 27.677609 95.065467 54.295569 46.792894 47.297351 18.401782 0.000969 52.56 242 41 1247.2 42 27.645656 94.061182 54.193729 46.473279 47.207552 18.276305 0.000711 52.09 242 42 1277.6 43 27.613739 93.067506 54.092079 46.155846 47.117923 18.151684 0.000522 51.63 242 43 1308.1 44 27.581859 92.084328 53 .990621 45.840582 47.028464 18.027912 0.000384 51.17 242 44 1338.5 45 27.550016 91.111536 53.889353 45.527471 46 .939176 17.904985 0.000282 50.72 242 45 1368.9 46 27.5 18210 90.149021 53.788274 45.216499 46 .850056 17.782895 0.000207 50.27 242 46 1399.3 47 27.486440 89 .196674 53.687386 44.907651 46 .761106 17.661639 0.000152 49.113 242 47 1429.7 48 27.454708 88.254388 53.586686 44.600912 46.672325 17.541209 0.000112 49.39 242 48 1460.2 49 27.423011 87.322056 53.486175 44.296269 46.583712 17.421600 0.000082 48.95 242 49 1490.6 50 27.391352 86.399574 53 .385853 43.993706 46.495268 17.302807 0.000060 48.52 242 50 1521 .0 51 27.359729 85.486837 53.285719 43.693211 46.406991 17.184823 0.000044 48.09 242 51 1551.4 52 27.328142 84.583742 53.185773 43.394767 46 .318882 17.067645 0.000032 47.67 242 52 1581 .8 53 27.296592 83.690187 53.086015 43.098362 46 .230941 16.951265 0.000024 47.25 242 53 1612.3 54 27.265078 82.806072 52.986443 42.803982 46.143166 16.835679 0.000018 46.84 242 54 1642.7 55 27.233601 81 .931297 52.887058 42.511612 46.055558 16.720881 0.000013 46.43 242 55 1673.1 56 27.202160 81.065764 52.787860 42.221240 45 .968116 16.606865 0.000009 46 02 242 56 1703.5 According to remediation duration calculations for UP1 and UP2 , uran ium and nitrate remediation goals (NRC and State Criteria) are both met at 57 Months .
57 58 27.170755 27.139387 80.209374 79 .362031 52.688848 52.590021 41 .93285 1 41.646431 45.880841 45.793731 16.493628 16.381162 0.000007 0.000005 - 45.62 45.22 242 242 57 58 1733.9 1764.4 However, groundwater extraction will continue in the WAA "BLUFF" Area to maintain the minimum treatment system flow rate .
59 27.108055 78.523639 52.491380 41.361968 45.706786 16.269463 0.000004 44.82 242 59 1794.8 60 27.076759 77.694104 52.392924 41. 079448 45.620007 16.158526 0.000003 44.43 242 60 1825.2 61 27.045499 76.873333 52.294652 40.798858 45 .533392 16.048345 0.000002 44.05 242 61 1855.6 62 27.014275 76.061232 52.196565 40.520184 45.446942 15.938916 0.000001 43.66 242 62 1886.0 63 26.983087 75.257711 52.098662 40.243414 45 .360656 15.830233 0.000001 43.28 242 63 1916.5 64 26.951936 74.462678 52.000942 39.968534 45 .274533 15.722290 0.000001 42.91 242 64 1946.9 65 26.920820 73.676043 51 .903406 39.695532 45 .188575 15.615084 0.000001 42.54 242 65 1977.3 66 26.889740 72.897719 51 .806053 39.424395 45.102779 15.508609 0.000000 42.17 242 66 2007.7 67 26.858696 72.127618 51.708882 39.155109 45.017 146 15.402860 0.000000 41.80 242 67 2038.1 68 26.827688 71.365651 51.611893 38.887663 44.931676 15.297832 0.000000 41.44 242 68 2068.6 69 26.796716 70.611735 51.515087 38.622043 44.846368 15.193520 0.000000 41.08 242 69 2099.0 70 26.765779 69.865782 51.418462 38.358238 44.761222 15.089920 0.000000 40.73 242 70 2129.4 71 26.734878 69 .127710 51.322 018 38.096235 44.676238 14.987025 0.000000 40.38 242 71 2159.8 72 26.704013 68.397436 51.225755 37.836022 44.591415 14.884833 0.000000 40.03 242 72 2190.2 73 26.673183 67.674875 51.129673 37.577585 44.506753 14.783337 0.000000 39.69 242 73 2220.7 74 26.642389 66.959949 51.033771 37.320914 44.422252 14.682534 0.000000 39.35 242 74 2251 .1 75 26.611631 66.252574 50.938048 37.065996 44.337912 14.582417 0.000000 39.01 242 75 2281 .5 76 26.580908 65.552673 50.842506 36.812820 44.253731 14.482984 0.000000 38.68 242 76 2311 .9 77 26.550221 64.860165 50.747142 36.56 1372 44.169710 14.384228 0.000000 38.35 242 77 2342.3 78 26.519569 64.174973 50.651958 36.311642 44.085849 14.286146 0.000000 38.02 242 78 2372.8 79 26.488952 63.497020 50 .556952 36.063618 44.002147 14.188732 0.000000 37.70 242 79 2403.2 1 of 2
Western Area Combined Influent - Uranium WAA U>DCGL (GE- WAA-BLUFF (GE-WAA-WAA-WEST (GE-WAA- WU-1348 (GETR-WU- WAA-EAST (GE-WAA- 1206-NORTH (GETR-WU-PBA (GE-WU-01) WAA-01 through GE- 06 through GE-WAA-
- 05) 01) 14 & GE-WAA-15) WU-02)
Area WAA-041 13}
C; (ug/L) 29.02 146.94 58.64 61.98 51.13 14.27 303.55 Cm.,
(ug/Ll 29.02 146.94 58.64 61.98 51.13 22.29 303.55 Flow Rate (Qom) 5 99 10 4 20 104 8 R 109.6 13.1 13. 1 55.3 13.1 13 .1 50.4 PV (liters) 6 .548 ,662 118 ,295,089 67,593 ,844 1,749,984 133,552 ,129 192,892,116 85,334 C -c (-Q/(PV*R))t Q
(liters/day) 27 ,255 539,648 54,510 21 ,804 109 ,020 566,903 43 ,608 t- oe Time Required for Initial Cone. to Reach Max. Level (months) 0 0 0 0 0 365 0 I
Cumulative Time WU-PBA WAAU>DCGL WAA-WEST WU-1348 WAA-EAST WAA-BLUFF 1206-NORTH I Combined WEIGHTED Influent Flow (Months)
AVERAGE Rate Months Davs Notes 80 26.458371 62.826228 50.462124 35.817288 43.918604 14.091983 0,000000 37.38 242 80 2433.6 81 26.427825 62.162523 50.367474 35.572641 43.835220 13.995894 0.000000 37.08 242 81 2464.0 82 26.397314 61.505830 50.273001 35 .329665 43.751994 13.900459 0.000000 36.74 242 82 2494.4 83 26 .366839 60.856074 50.178706 35.088348 43.668926 13.805676 0,000000 36.43 242 83 2524.9 84 26.336398 60.213181 50.084588 34.848679 43.586015 13.711539 36.12 242 84 2555.3 85 26.305993 59.577081 49.990646 34.610648 43.503262 13.618043 35.82 242 85 2585.7 86 26.275623 58.947700 49.896880 34.374242 43.420667 13.525185 35.51 242 86 2616. 1 87 26.245288 58.324969 49.803290 34.139451 43.338227 13.432961 35.22 242 87 2646.5 88 26.214988 57.708815 49.709876 33 .906264 43.255945 13.341365 34,92 242 88 2677.0 89 26.184723 57.099171 49.616637 33 .674670 43 .173819 13.250394 34.62 242 89 2707.4 90 26.154493 56.495968 49.523573 33.444658 43.091848 13.160043 34.33 242 90 I 2737.8 91 26.124298 55.899136 49.430683 33.216216 43 .010034 13.070308 34.05 242 91 2768.2 92 26.094138 55.308610 49.337968 32 .989335 42 .928374 12.981185 33.76 242 92 2798.6 93 26.064012 54.724322 49.245427 32.764004 42.846870 12.892670 33.48 242 93 2829.1 94 26.033922 54.146207 49. 153059 32.540212 42 .765520 12 .804758 33.20 242 94 2859.5 95 26.003866 53.574199 49.060864 32 .317948 42 .684325 12.717446 32.92 242 95 2689.9 96 25.973845 53.008233 48,968842 32.097203 42.603284 12.630729 32,65 242 96 I 2920.3 97 25.943858 52.448247 48 ,876993 31.877965 42 .522397 12.544603 32.37 242 97 2950.7 98 25.913906 51.894 176 46.765317 31 .660225 42.441663 12.459065 32.10 242 98 2961 .2 99 25.883989 51.345959 48.693812 31.443972 42.361083 12.3741 10 31.84 242 99 I 3011.6 100 25.854106 50.803533 48.602478 31.229196 42.280656 12 .289734 31.57 242 100 3042. 0 101 25.824257 50.266837 48.511317 31 .015887 42 .200381 12.205934 31.31 242 101 3072.4 102 25.794444 49.735811 48.420326 30.804035 42.120259 12.122705 31.05 242 102 I 3102.8 103 25.764664 49.210395 48.329505 30 .593631 42.040289 12.040043 30.80 242 103 31 33.3 104 25.734919 48.690530 48.238855 30.364663 41.960471 11.957945 30.54 242 104 3163.7 105 25.705208 48.176156 48.148376 30.177123 41 .880804 11.876407 30.29 242 105 31 94. 1 106 25.675532 47.667216 48.058065 29 .971000 41 .801289 11.795425 30.04 242 106 3224.5 I 25.645890 47.163653 47.967925 29.766285 41 .721924 11.714995 . ;* 242 107 3254.9 108 25.616282 46.665410 47.877953 29.562969 41 .642710 11.635114 29.55 242 108 3285.4 109 25.586708 46 .172430 47.788150 29.361041 41.563647 11.555777 29.31 242 109 3315.8 110 25.557 168 45.684658 47.698515 29.160492 41.484734 11.476961 29.07 242 110 3346.2 111 25.527663 45.202039 47 ,609049 28.961314 41.405970 11.398723 28.83 242 111 3376.6 112 25.498 191 44.724518 47,519750 28.763496 41.327356 11.320998 28.60 242 112 3407.0 113 25.468754 44.252042 47.430619 28.567029 41.248892 11.243803 28.36 242 113 3437.5 114 25.439350 43.7B4557 47.341655 28.371904 41.170576 11.167135 28.13 242 11 4 3467.9 115 25.409981 43.322011 47.252858 28.178111 41.092409 11.090989 27.91 242 11 5 3498.3 116 25.3B0645 42.864351 47.164228 27.985643 41.014391 11.015362 27.68 242 11 6 3528.7
~
117 25.351344 42 .411526 47 075764 27.794489 40.936520 10.940252 27.48 242 11 7 118 25.322076 41.963485 46.987465 27.604640 40.B58797 10.865653 27.23 242 118 35 9.
119 25.292842 41.520177 46.899333 27.416089 40.781222 10.791563 27.01 242 119 3620.0 120 25.263641 41.0B1552 46.8 11365 27.228B25 40.703795 10.717978 26.80 242 120 3650.4 121 25.234475 40.647561 46.723563 27.042841 40.626514 10.644895 26.58 242 121 3680.8 122 25.205342 40.218154 46.635925 26.858126 40.549380 10.5723 10 26.37 242 122 3711.2 123 25.176242 39.793284 46.548452 26.674674 40.472392 10.500221 26.16 242 123 3741 .7 124 25.147176 39.372902 46.461143 26.492474 40.395551 10.428622 25.95 242 124 3772. 1 125 25 .118144 38.956961 46 .373997 26.3 11520 40.318855 10.357512 25.74 242 125 3802.5 126 25.089146 38.545414 46.287015 26 .131801 40.242306 10.286887 25 53 242 126 3832.9 127 25.060180 38.1382 15 46 .200196 25.953309 40.16590 1 10 .216744 25.33 242 127 3863.3 According to remediation du ra tion calculations 1206 South, uranium and nitrate remediation goals (NR C and State Crite ria) a re both met at 126.3 Months 128 25.031249 37.7353 18 46.1 13540 40.089642 10.147078 24.72 238 128 3893.8 129 25.002350 37.336676 46.027047 40.013527 10.077888 24.52 238 129 3924.2 130 24.973485 36.942247 45.940715 39.937557 10.009170 24.33 238 130 3954.6 131 24.944654 36.551983 45.854546 39.861731 9.940920 24.13 2311 131 3985.0 132 24.915855 36.165843 45.768538 39.786049 9.873135 23.94 238 132 4015.4 133 24.887090 35 .783782 45.682692 39.710510 9.805813 23.75 238 133 4045.9 134 24.858358 35.405757 45.597006 39.635 115 9.738950 23.56 238 134 4076.3 135 24.829659 35.031726 45.511482 39.559864 9.672543 23.38 238 135 4106.7 136 24.800994 34.661646 45.426117 39.484755 9.606588 23.19 238 136 4137.1 137 24.772361 34.295475 45.340913 39.409789 9.541083 23.01 238 137 4167.5 138 24.743762 33.933173 45.255869 39.334965 9.476025 22.83 238 138 4198.0 139 24,715195 33 .574698 45.170984 39.260283 9.411411 22.65 238 139 4228.4 140 24.686662 33.220011 45.086259 39.185743 9.347237 22.48 238 140 4258.8 141 24.658161 32.869070 45.001692 39.111344 9.283500 22.30 238 14 1 4289.2 142 24.629694 32.521836 44.917284 39.037087 9.220199 22.13 238 142 4319.6 143 24.601259 32.178271 44.833034 38.962971 9.157329 21.95 238 143 4350.1 144 24.572857 31 .838335 44.748942 38.888995 9.094887 21.78 238 144 4380.5 145 24.544488 31.501991 44.665008 38.815160 9.032872 21.62 238 145 4410.9 146 24.516151 31.169199 44.581232 38.741465 8.971279 21.45 238 146 4441 .3 147 24.487848 30.839923 44.497613 38.667910 8.910106 21.28 238 147 4471 .7 148 24.459577 30.514126 44.414150 38.594495 8.849350 21.12 238 148 4502.2 149 24.431338 30.191771 44.330844 38.521219 8.789009 20.96 238 149 4532.6 150 24.403133 29.872820 44.247694 38.448082 8.729079 20 .79 238 150 4563.0 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 Acco rding to remediation duratio n calculations WAA West, uran ium and nitrate remediation goals (NRC and State Criteria) are both met at 404 .2 Months Acco rding to remediation duration calculations WAA East, uranium and nitrate remediation goals (NRC and State Criteria) are both met at 59 1.2 Months 2 of2
Western Area Combined Influent - Nitrate WAA U>DCGL (GE- WAA-BLUFF (GE-WAA-WAA-WEST (GE-WAA- WU-1348 (GETR-WU- WAA-EAST (GE-WAA- 1206-NORTH (GETR-WU-PBA (GE-WU~1) WAA-01 through GE- 06 through GE-WAA-
- 05) 01) 14 & GE-WAA-15) WU~2)
Area WAA~41 131 C;
(ua/Ll 61.73 35.76 10.22 11.57 72.23 114.10 38.64 Cm.,
(ug/Ll 61.73 35.76 10.22 11.57 72.23 312.75 38.64 Flow Rate laPml 5 99 10 4 20 104 8 R 22.7 4.6 4.6 11.9 4.6 4.6 10.9 PV
!liters) 6,548,662 118,295 ,089 67,593,844 1,749 ,984 133,552,129 192,892 ,116 85,334 Q C -c (-Q/(PV*R))t (liters/davl 27,255 539,648 54,510 21 ,804 109 ,020 566,903 43 ,608 c oe Time Required for Initial Cone, to Reach Max. Level lmonthsl 0 0 0 0 0 0 0 I
Cumulative Time WU-PBA WAAU>DCGL WAA-WEST WU-1348 WAA-EAST WAA-BLUFF 1206-NORTH I Combined WEIGHTED Influent Flow (Months) AVERAGE Rate Months Davs Notes 0 61.730000 35 .761919 10.220000 11.570000 72.2250 00 114.100192 38 .640000 70.47 250.00 0 0.0 1 61.386 97 1 34.703700 10. 165877 11.206095 71.837838 111 .913425 9.249148 68.16 250.00 1 30.4 2 61. 045849 33.676794 10.112040 10.853635 71.452751 109.768568 2.213942 66.59 250.00 2 60.8 3 60.706622 32.680274 10.058489 10 .512262 71 .069729 107.664818 0.529945 65.22 250.00 3 91.3 4 60.369280 31 .713243 10.005221 10 .181625 70.688760 105.601386 0.126851 63.92 250.00 4 121 .7 5 60.033812 30.774827 9.952235 9.861388 70.309833 103 .577501 0.030364 62.66 250.00 5 152.1 6 59.700209 29 .864178 9.899530 9.551223 69 .932937 101.592405 0.007268 61.43 250.00 6 182 .5 7 59.368460 28 .980477 9.847104 9.250813 69.558062 99 .645353 0.001740 60.22 250.00 7 212.9 8 59.038554 28.122925 9.794955 8.959852 69.185196 97.735618 0.000416 59.05 250.00 8 243.4 9 58.710481 27.290749 9.743083 8.678043 68.814328 95 .862483 0.000100 57.89 250.00 9 273.8 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 ;
10 304.2 howeve r 1206 North groundwater extraction will continue until water injection in WU-BA3 is discontinued in Month 83 .
58.384232 26.483197 9.691485 8.405097 68.445449 94.025247 0.000024 56.77 250.00 10 11 58.059795 25.699541 9.640161 8.140736 68.078548 92 .223223 0.000006 55.67 242.00 11 334.6 12 57.737162 24.939074 9.589 108 7.884689 67.713613 90.455735 0.000001 54.59 242.00 12 365.0 13 57.416321 24.201110 9.538326 7.636696 67.350634 312.750000 0.000000 146.73 242.00 13 395.5 14 57.097263 23.484983 9.4878 13 7.3965 03 66.989601 306.756045 0.000000 143.91 242.00 14 425.9 15 56.779978 22.790046 9.437567 7.163865 66.630503 300.876965 0.000000 141.15 242.00 15 456.3 16 56.464456 22.115673 9.387588 6.938544 66.273330 295.110560 0.000000 138.44 242.00 16 486.7 17 56.150687 21.461255 9.337873 6.720309 65,918072 289.454670 0.000000 135.79 242.00 17 517.1 18 55.838662 20.826202 9.288421 6.508939 65 .564719 283.907177 0.000000 133.19 242.00 18 547.6 19 55.528371 20.209941 9.239231 6.304217 65.213259 278.466004 0.000000 130.64 242.00 19 578.0 20 55.219805 19.611915 9. 190302 6.105934 64.863683 273.129112 0.000000 128.15 242.00 20 608.4 21 54.912952 19.031585 9.141632 5.913887 64.5 15982 267.894504 0.000000 125.70 242.00 21 638.8 22 54.607805 18.468427 9.093219 5.727880 64. 170144 262.760219 0.000000 123.30 242.00 22 669.2 23 54.304354 17.921934 9.045 06 3 5.547724 63.826160 257.724334 0.000000 120.95 242.00 23 699.7 24 54.002589 17.391612 8.997 162 5.373235 63.484020 252.784963 0.0 00000 118.65 242.00 24 730.1 25 53 .702501 16.876982 8.949515 5.204233 63 .1 43714 247.940257 0.000000 116.39 242.00 25 760.5 26 53.404080 16.377581 8.902120 5.040547 62.805232 243.188401 0.000000 114.18 242.00 26 790.9 27 53.107318 15.892957 8.854976 4.882010 62.468565 238.527617 0.000000 112.01 242.00 27 821.3 28 52.812205 15.422674 8.808082 4.728458 62. 133702 233.956157 0.000000 109.89 242.00 28 851.8 29 52.518732 14.966306 8.761436 4.579737 61.800634 229.472311 0.000000 107.81 242.00 29 882.2 30 52.226889 14.523443 8.715037 4.435692 61.469352 225.074400 0.000000 105.76 242.00 30 912.6 31 51.936669 14.093685 8.668883 4.296179 61 .1 39846 220. 7607 76 0.000000 103.76 242.00 31 943.0 32 51.648 06 1 13.676643 8.622975 4.161054 60.812106 216.529824 0.000000 101.80 242.00 32 973.4 33 51.361 056 13.271942 8.577309 4.030178 60.486122 212.379959 0.000000 99.88 242.00 33 1003.9 34 51.075647 12.879216 8.531885 3.903419 60 .1 61887 208.309628 0.000000 98.00 242.00 34 1034.3 35 50 .791824 12.498111 8.486702 3.780647 59 .839389 204.317306 0.000000 96.15 242.00 35 1064.7 36 50.509578 12.128284 8.441758 3.661736 59.518620 200.401499 0.000000 94.34 242.00 36 1095.1 37 50.228900 11.769400 8.397052 3.546565 59 .1 99570 196.560739 0.000000 92.56 242.00 37 1125.5 38 49.949782 11.4211 35 8.352583 3.435017 58.882231 192.793588 0.000000 90.82 242.00 38 1156.0 39 49.672215 11.083176 8.308349 3.326977 58.566593 189 .098636 0.000000 89.12 242.00 39 1186.4 40 49.396 190 10.755217 8.264349 3.222336 58 .252647 185.474500 0.000000 87.45 242.00 40 1216.8 41 49.121699 10.436963 8.220583 3.120985 57.940384 181.919820 0.000000 85.81 242.00 41 1247.2 42 48.848734 10.128126 8.177048 3.022823 57.629794 178.433268 0.000000 84.20 242.00 42 1277.6 43 48.577285 9.828428 8.133744 2.927747 57.320870 175 .013536 0.000000 82.63 242.00 43 1308, 1 44 48 .307345 9. 537598 8.090669 2.835662 57.013601 171.659345 0.000000 81.08 242.00 44 1338.5 45 48. 038905 9.255374 8.047822 2.746474 56 .707980 168.369438 0.000000 79.57 242.00 45 1368 ,9 46 47.771957 8.981501 8.005203 2.660090 56.403997 165.142583 0.000000 78.09 242.00 46 1399.3 47 47.506492 8.715733 7.962809 2.576424 56 .1 01643 161.977571 0.000000 76.63 242.00 47 1429.7 48 47.242502 8.45782 8 7.920639 2.495389 55 .800911 158.873219 0.000000 75.21 242.00 48 1460.2 49 46.979979 8.207555 7.878693 2.416903 55 .501790 155 .828362 0.000000 73.81 242.00 49 1490.6 50 46.718915 7.964688 7.836969 2.340885 55.204273 152 .841860 0.000000 72.44 242.00 50 1521 .0 51 46.459302 7.729008 7.795465 2.267259 54.908350 149.912596 0.000000 71.09 242.00 51 1551.4 52 46.201131 7.500301 7.754182 2.195948 54.614014 147.039473 0.000000 69.78 242.00 52 1581 .8 53 45.944395 7.278362 7.713 117 2.126880 54.321256 144.221413 0.000000 68.49 242.00 53 1612.3 54 45 .689085 7.062990 7.672270 2.059984 54.030067 141.457363 0.000000 67.22 242.00 54 1642.7 55 45 .43 5195 6.853992 7.631639 1.995193 53 .740439 138.746287 0.000000 65.98 242.00 55 1673.1 56 45.1827 15 6.651177 7.591223 1.932439 53.452363 136.087169 0.000000 64 76 242.00 56 1703.5 Accordin g to remediation duration calculations for UP 1 and UP2, uranium and nitrate remediation goals (NRC and State Criteria ) are both met at 57 Months .
57 63.57 242.00 57 1733.9 However, groundwater extraction will co ntinue in the WAA "BLUFF'" Area to maintain the minimum treatment system flow rate.
44 .931638 6.454365 7. 55 1022 1.871 659 53 .165832 133.4790 14 0.000000 58 44.681957 6.263375 7.511033 1.812791 52 .880836 130.920845 0.000000 62.40 242.00 58 1764.4 59 44.433663 6.078038 7.471256 1.755774 52 .597369 128.411705 0.000000 61.25 242.00 59 1794.8 60 44.186748 5.898185 7.43168 9 1.700550 52 .31542 1 125.950653 0.000000 60.12 242.00 60 1825.2 61 43.941206 5.723653 7.392332 1.647064 52 .034984 123.536768 0.000000 59.02 242.00 61 1855.6 62 43.697028 5.554287 7.353 184 1.595260 51 .756050 121. 169145 0.000000 57.94 242.00 62 1886.0 63 43.454207 5.389931 7.314243 1.545085 51.478612 118.846899 0.000000 56.88 242.00 - -64___ 191 6.5 63 64 43.212736 5.230440 7.275508 1.496488 51 .20266 1 116 .569160 0.000000 55.84 242.00 1946-9 65 42.972606 5.075667 7.236978 1.449420 50.928189 114.335074 0.000000 54.82 242.00 65 1977.3 66 42.7338 10 4.925475 7.198653 1.403832 50.655189 112.143805 0.000000 53.82 242.00 66 2007.7 67 42.496342 4.779727 7.160530 1.359678 50.383652 109.994532 0.000000 52.84 242.00 67 2038.1 68 42.260193 4.638292 7.122609 1.316913 50.113570 107.886451 0.000000 51.88 242.00 68 2068.6 69 42.025357 4.501041 7.084889 1.275493 49 .844936 105 .8187 72 0.000000 50.93 242.00 69 2099.0 70 41.791825 4.367852 7.047369 1.235375 49 .577743 103.790721 0.000000 50.01 242.00 70 2129.4 71 41 .559591 4.238605 7.010047 1.196520 49.311981 101.801538 0.000000 49.10 242.00 71 2159.8 72 41.328648 4.113 182 6.972923 1. 158886 49.047644 99.850479 0.000000 48.21 242.00 72 2190.2 73 41.098988 3.991470 6 .935996 1.122436 48.784725 97.936812 0.000000 47.34 242.00 73 2220.7 74 40 .870604 3.873359 6.899264 1.087133 48.523214 96.059821 0.000000 46.49 242.00 74 2251.1 75 40.643489 3.758744 6.862727 1.052940 48.263106 94.2 18803 0.000000 45.65 242.00 75 2281.5 76 40.417636 3.647520 6.826383 1.019822 48.004391 92.413 069 0.000000 44.83 242.00 76 2311 .9 77 40.193039 3.539588 6. 790232 0.987746 47.747064 90.641943 0.000000 44.02 242.00 77 2342.3 78 39.969689 3.434849 6.754272 0.956679 47 .491116 88 .9047 60 0.000000 43.23 242.00 78 2372.8 79 39.747581 3.333209 6.718503 0.9265 89 47.236540 87.200872 0.000000 42.45 242.00 79 2403.2 1 of 2
Western Area Combined Influent - Nitrate WAA U>DCGL (GE- WAA-BLUFF (GE-WAA-WAA-WEST (GE-WAA- WU-1348 (GETR-WU- WAA-EAST (GE-WAA- 1206-NDRTH (GETR-WU-PBA (GE-WU-01) WAA-01 through GE- 06 through GE-WAA-
- 05) 01) 14 & GE-WAA-15) WU-02)
Area WAA-041 131 c,
(U!I/Ll 61.73 35.76 10.22 11.57 72.23 114.10 38.64 Cm.,
rua/Ll 61.73 35.76 10.22 11.57 72.23 312.75 38.6' Flow Rate (gpm) 5 99 10 4 20 104 II R 22.7 4.6 4.6 11.9 4.6 4.6 10.9 PV (liters) 6,548 ,662 118 ,295 ,089 67 ,593,844 1,749,984 133,552 ,129 192,892 ,116 85 ,334 Q C -c (-Q/(PV*R))t (liters/day) 27 ,255 539,648 54,510 21 ,804 109 ,020 566 ,903 43 ,608 c oe Time Required for Initial Cone. to Reach Max. Level (months) 0 0 0 0 0 0 0 Cumulative Time WU-PBA WAAU>DCGL WAA-WEST WU-1348 WAA-EAST WAA-BLUFF 1206-NORTH I
I Combined WEIGHTED Influent Flow (Months) AVERAGE Rate Months Days Notes 80 39.526707 3.234577 6.682923 0.897446 46 .983328 85.529639 0.000000 41.69 242.00 80 2433.6 81 39.307060 3.138864 6.647531 0.869219 46 .731474 83 .890435 0.000000 40.95 242.00 81 2464.0 82 39.088634 3.045983 6.612327 0.841880 46.480970 82 .282648 0,000000 40.21 242.00 82 2494.4 83 38 .871421 2.955850 6.577309 0.815401 46 .231809 80.705674 0.000000 39.50 242.00 83 2524.9 84 38 .655416 2.868385 6.542477 0.789754 45 .983983 79 .158924 40.07 242.00 84 2555.3 85 38.440611 2.783507 6.507829 0.764915 45.737486 77.641817 39.36 242.00 85 2585.7 86 38.226999 2.701141 6.473365 0.740856 45.492311 76.153786 311.66 242.00 86 2616.1 87 38.014575 2.6212 13 6.439083 0.717554 45.248449 74.694274 37.98 242.00 87 2646.5 88 37.803331 2.543649 6.404983 0.694985 45 .005895 73.262734 37.30 242.00 88 2677.0 89 37.593261 2.468381 6.371063 0.673126 44.764641 71.858630 36.64 242.00 89 2707.4 90 37.384358 2.395340 6.337323 0.651955 44.524680 70.481436 35.99 242.00 90 2737.8 91 37.176616 2.324460 6.303762 0.631449 44.286005 69 .130636 35.36 242.00 91 2768.2 92 36.970028 2.255678 6.270379 0.611589 44 .048610 67.805725 34.74 242.00 92 2798.6 93 36.764589 2.188931 6.237172 0.592353 43 .812488 66 .5 06207 34.12 242.00 93 2829.1 94 36.560291 2.124159 6.204141 0.573722 43.577631 65 .231593 33.53 242.00 94 2859.5 95 36.357 128 2.061303 6.171285 0.555677 43 .344033 63 .981409 32.94 242.00 95 28 89.9 96 36.155094 2.000308 6.138603 0,538199 43 .111688 62.755184 32.36 242.00 96 2920.3 97 35.954183 1.941118 6.106094 0.521272 42 .880587 61 .552461 31.79 242.00 97 2950.7 98 35.754389 1.883679 6.073757 0.504876 42.650726 60.372788 31,24 242.00 98 2981 .2 99 35.555705 1.827939 6.041592 0.488997 42.422097 59 .215724 30.69 242.00 99 3011.6 100 35.358124 1.773849 6.009596 0.473617 42 .194693 58 .080835 30.16 242.00 100 3042.0 101 35.161642 1.721360 5.977771 0.458720 41 .968509 56 .967697 29.64 242.00 101 3072.4 102 34.966252 1.670424 5.946114 0.444292 41 .743537 55.875893 29.12 242.00 102 3102.8 103 34.771947 1.620995 5.914624 0.430318 41 .519770 54.805013 28.62 242.00 103 3133.3 104 34.578722 1.573028 5.883301 0.416784 41.297204 53.754657 28.12 242.00 104 3163.7 105 34.386571 1.526481 5.852144 0.403675 41 .075830 52 .724431 27.64 242.00 105 3194.1 106 34.195487 1.481312 5.821153 0.390978 40 .855643 51 .713951 27.16 242.00 106 3224.5 107 34.005465 1.437479 5.790325 0.378681 40.636637 50.722836 26.69 242.00 107 3254.9 108 33.816500 1.394943 5.759660 0.366771 40.418804 49 .750716 26.23 242.00 108 3285.4 109 33.628584 1.353666 5.729158 0.355235 40.202139 48.797228 25.78 242.00 109 3315.8 110 33.441713 1.313610 5.698818 0.344062 39.986635 47.862013 25.34 242.00 110 3346.2 111 33.255880 1.274739 5.668638 0.333240 39.772287 46.944722 24.91 242.00 111 3376.6 112 33,071079 1.237019 5.638618 0.322759 39.559088 46 .045011 24.48 242.00 112 3407. 0 113 32.887306 1.200414 5.608757 0.312607 39.347031 45.162543 24.07 242.00 113 3437.5 114 32.704554 1.164893 5.579054 0.302775 39 .136112 44 .296989 23.66 242.00 114 3467.9 115 32.522817 1.130423 5.549508 0.293252 38.926323 43.448022 23.26 242.00 115 3498.3 116 32.342091 1.096973 5.520119 0.284028 38.717658 42 .615327 22.86 242.00 116 3528.7 117 32 .162368 1.064513 5.490885 0.275095 38.510112 41.798590 22.48 242.00 117 3559.1 118 31.983644 1.033013 5.461806 0.266443 38.303679 40.997507 22.10 242.00 118 3589T 119 31 .805914 1.002446 5.432882 0.258062 38.098352 40.211776 21.73 242.00 119 3620.0 120 31.629171 0.972783 5.404110 0.249946 37 .894126 39.441104 21.36 242.00 120 3650.4 121 31.453410 0.943998 5.375491 0.242084 37 .690994 38.685203 21.00 242.00 121 3680.8 122 31.278626 0.916064 5.347023 0.234470 37.488952 37 .943788 20.65 242.00 122 3711 .2 123 31.104813 0,888957 5.318707 0.227095 37 .287992 37 .216583 20.31 242.00 123 3741 .7 124 30.931966 0.862652 5.290540 0.219953 37 .088110 36,503315 19.97 242.00 124 3772.1 3802.5 125 30.760079 0.837126 5.262522 0.213035 36.889299 35.803717 19.63 242.00 125 36.691554 35 .117527 1Q ~1 ?A'J nn 126 3832.9 126 30.589148 0.812355 5.234653 0.206334 127 30.4 19167 0.788317 5.206931 0.199844 36.494869 34.444489 18.99 242.00 127 3863.3 According to remediation duration calculatio ns 1206 South, uran ium and nitrate remediation goals (NRC and State Criteria ) are both met at 126. 3 Months 128 30.250130 0.764990 5.179356 36.299238 33.784349 18.98 238.00 128 3893.8 129 30.082032 0.742353 5.151927 36 .104656 33.136861 18.67 238.00 129 3924.2 130 29.914869 0.720386 5.124643 35 .911118 32.501782 18.36 238.00 130 3954.6 131 29.748634 0.699070 5.097504 35 .718616 31.878875 18.06 238.00 131 3985.0 132 29.583323 0.678384 5.070509 35.527146 31.267906 17.77 238.00 132 4015.4 133 29.4 18931 0.658310 5.043656 35.336703 30.668646 17.47 238.00 133 4045.9 134 29.255452 0.638830 5.016946 35.147281 30.080872 17.19 238.00 134 4076.3 135 29.092882 0 .619927 4.990377 34.958874 29 .504362 16.91 238.00 135 4106.7 136 28.931215 0.601583 4.963949 34.771477 28 .938901 16.63 238.00 136 4137.1 137 28.770447 0.583781 4.937661 34.585084 28.384278 16.36 238.00 137 4167.5 138 28.610572 0,566507 4.911512 34.399691 27 .840284 16.10 238.00 138 4198.0 139 28 .451585 0.549744 4.885501 34 .215292 27.306716 15.84 238.00 139 4228.4 140 28.293482 0.533476 4.859629 34.031881 26.783374 15.58 238.00 140 4258.8 141 28.136257 0.517690 4.833893 33.849453 26.270062 15.33 238,00 141 42 89.2 142 27.979906 0.502372 4.808293 33.668003 25.766587 15.09 238.00 142 4319.6 143 27.824424 0.487506 4.782830 33.487525 25 .272762 14.85 238.00 143 4350.1 144 27.669806 0.473080 4.757501 33.308016 24 .788402 14.61 238.00 144 4380.5 145 27.516047 0.459082 4.732306 33.129468 24 .313324 14.38 238.00 145 4410.9 146 27.363142 0.445497 4.707244 32.951878 23.847351 14.15 238.00 146 4441 .3 147 27.211088 0.432315 4.682316 32.775239 23.390309 13.92 238.00 147 4471 .7 148 27.059878 0.419522 4.657519 32.599547 22.942026 13.70 238.00 148 4502.2 149 26.909508 0.407108 4.632854 32.424798 22 .502335 13.49 238.00 149 4532.6 150 26.759974 0.395061 4.608319 32 .250985 22 .07 1070 13.27 238.00 150 4563.0 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 of2 2.0a -Treatment System Effluent Criteria: BA1 and WA Water Treatment Design Basis Revision D Cimarron Environmental Response Trust 9/26118 Treatment Effluent Criteria Constituent Source Groundwater Contaminant Treatment Additives Limitation Rationale Treatment Objectives ,<:, "'":i,u ::,;:a' "'.,., ~¢:i "'~f. ~ :;:\'!:! ' ,..... - ,'[;', ,!",
,' 1s.:~ *:~ :.tl~.'.!< ,p ~l, ~
Water Quality Objectives (for compliance and injection purposes)
~J
~
,,,, .,, ~,~".:~J' t , .a,*~ f
~$ ~-..c!
- ~
Influent Cone,/ Injection Influent Cone. /
~
~
limitation Basis Inj ection Injection Injection Injection Injection Injection Influent Injection Influent Criterion/ Influent Injection Injection Influent Injection Injection 3
OPDES Permit Concentration Limits Criterion Criterion Criterion Criterion Criterion Criterion EPA DWEL EPA DWEL' Cmea/ Cone, Cm,., Criterion Cone Cm,., Influent Cone, cm.,o Cone, Criterion Influent Cone, Criterion Cone. Criterion Criterion OPDES Permit Requirement Su lfate Fe/Mn Adenosine Het erotrophic Anaerobic Reducing Reducing Tri phosphate Ortho- Dissolved Tannin/
1 Uranium Nitrate Fluoride pH Plate Count Growth Bacteria Bacteria (ATP) LSI Molybdenum Boron Selenium Su lfate Copper Manganese Ch loridess Nickel Sodiums Zinc TDC Phosphate TDS Tota l Iron Iron Silica Lignln Temperature Groundwater Extraction Process percent presence/ percent mg/L mg/L Stream µg/L mg/L mg/ L S.U. (co lonies/m l) population ' absence population 3
(colonies/ml) _,_ mg/L mg/L µg/L mg/L mg/l mg/L mg/l µg/l mg/l µg/L mg/L mg/L mg/L mg/L (as Fe 2
') (as Si0 2 ) mg/L ----
BAl 54,77 ;;251 50,03 50,10 580 5400 53,95 5959 51,53 50.56 (Outfa ll 002) 530 There can be no addition of heat from artificial sources
-or- 55 54 6,5
- 9,0 5300 515% Absent Absent 5100,000 -0, 5 - +05 50,20 57 5100 514,3 51 <30 <5 to the water discharged at Outfalls 001 & 002 WATF ND (1 .0) 58.97 ;;240 50,01 50,54 582,6 54,34 56,31 512 00 51 50.05 (Outfall 001)
Treatment Effluent Criteria Constituent Source
,i*. - ~
_, _,,;~ :.: ,, *<-*,:*, ,;; ,_~f' '/f: ,, . r\1 ,,.._,;,,, -.- Water Quality Objectives (for compliance and injection purposes) ,~-* J ~ ,r',,:~- ICr ,,; ~'.'.i: t:,:*,v~~
Limitation Rationale Treatment Additives Groundwater Constituents Injection Injection Influe nt Injection Injection OPDES Permit Limitation Basis Criterion/
OPDES Permi t Requirement s Cm,ao Cm,ao Cm,., Cm.,, Criterion Cm,ao Cm,a, Cone. Influent Cone. Criterion Criterion Cm,., Cm.,, Cm,ao cm.. o Cm,,, Cm,., Requirement Influent Cone, cmca n Total Bicarbonate Bis 1,4, Dimethyl General Qua lity Lead Mercury Thallium Cyanide TSS Ammonia Si lver Alkalinity Alkalinity Potassium Magnesium Chromium Calcium Ba rium Arsenic Cadmium (2*Ethylhexyl) Dichloroben2ene Phthalate Total Halogens mg/l mg/L Groundwater Extraction Process (as CaC0 3 ) (as caco,)
Stream ---- µg/l µg/l µg/l µg/l mg/l mg/L µg/l mg/L mg/l µg/L mg/L mg/L µg/L µg/L µg/L µg/L µg/L mg/L 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 523,6 50,20 5463 5462 536,4 5180 (Outfall 002) quant ities that adhere to stream banks and coat bottoms of watercourses. Surface waters o f 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 ,;o,2 ,;17,3 ,;13,3 ,;45 ,;1,75 ss Sl80 ,;3340 S59 .7 S0,28 ,;3,29 S0,19 S881 SO,l WATF contain chemical, physica l, or biological substances in concentrations that are irritating to skin or sense organs or are toxic or cause illness upon ingestion by huma n beings. 515,5 522,3 5325 5294 5102 5182 (Outfall 001)
Definitions: Applicable Effluent Standards:
BAl
- Burial Area 1 1. Concentration limits specified in the OPDES permit CaC0 3 - calcium carbonate 2. Injection Cri t erion Cmean - mean pollutant effluent co ncentration calculated in OP DES permit. 3, EPA DWEL Cone. - concentration 4. Cmcan presented in the OPDES permit DWEL - Drinking water equivalent level 5. Average influent concentrations for WATF and BAl groundwater process streams EPA - Environmenta l Protection Agency 6, Water quality requirement specified in t he OPDES permit 2
Fe - - ferrous iron LSI - Langelier Saturation Index Rationale for Establishing Effluent Criteria:
mg/ L - milligrams pe r liter L Concentration limits specified in tne OPDES permit apply for uranium, nitrate, fluoride , and pH, OPOES
- Oklahoma Pollutant Discharge Elimination System 2. The injection criterion applies if:
Si0 2 - silica dioxide a. Influent concentration data are not available but an injectio n 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 t he injection criterion is less stringent than the corresponding influent concentration TDS
- Total Disso lved Solids 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).
TDC* Total Organic Carbon 4. The [mean presented in the OP DES permit applies if:
TSS -Total Suspended Solids a. Influent concentration data are not available but the water treatment process may affect the constituent concentration, characteristic, etc. of a r egulated constituent (e.g., selenium).
µg/L - micrograms per lit er 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).
USEPA - United States Environmenta l Prot ection Agency 5. The influent concentration applies if:
WATF - Western Area Treatmen t Facil ity a. An injection criterion exists, t he 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 appl ies if there are no other appl icable criteria or standa rd s \e.g., total halogens)
Notes :
1 The maximum treatme nt effluent uranium concentration for re-inje ction or OPDES discharge is 30 µg/ L. Maximum concentration prior to nitrate removal is non-detect (1 .0 µ.g/L detection limit) .
2 Anaerobic growth ana lysis is conducted by analyzing the popu lation 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.
3 EPA DWEL used for constituents fo r which groundwater data and Cmean levels are not available.
4 Cmcan va lues presented in OP DES discharge permit used for constituents for which groundwater data are not available.
5 Sodium and chloride concentration s in groundwater extracted from wells located near the Cimarron River may be significantly higher than t he concentrations reporte d for site monitoring we lls.
2.0b-Treatment System Influent Characteristics: BA1 and WA Revision D 9/26/18 Water Treatment Design Basis Cimmaron Environmenta l Response Trust 1
Influent Characteristics Flow Rates Nitrogen, Nitrogen, Total Total Nitrate- Nitrate- Drtho-Bicarbonate Carbonate Hydroxide Phenolphtha lein Total Sodi um 2
Sulfate TDS TOC Phosphorous Methane Temperatu re Uranium Uranium Nitrite Nitrite Fluoride Fluoride Iron Magnesium Manganese Phosphate Potassium Silica Groundwater Alkalinity Aluminum Calci um Chlorides' Ferro us Iron *c (Initial) (Ma ximum) pH LSI' RSI ' Alkalinity Alkalinity Alkalinity Alka linity
µg/L µg/L µg/L mg/L mg/L mg/L mg/l mg/ L Extraction Process Designated Nominal Range (Initial) (Maximum) (Initial) (Ma1Cimum) mg/L mg/L µg/L µg/ L µg/l mg/L mg/L mg/L mg/L mg/L µg/L µg/L 15.19 mg/l 50.54 606.61 3.07 Stream Remediation Area gpm gpm µg/L µg/ l mg/l mg/L m,/L m*/L s.u.
1.00 436.46 80.59 108831.03 20.43 0.40 545.93 49279.31 633 .23 0.20 605.21 24072.41 30758.62 - --- 15.29 "U>DCGL" AREA A 14 10
- 26 1720 1720 2.35 2.35 0.72 0.72 7.12 0.00 7.10 439.32 0.94 ~ - 0.75 763.78 61892.00 436.98 0 .13 2133.20 26132.00 91940.00 - 266.42 985.04 -
- 3. 79
- - ~
0.27 0.49 0.49 7.09 D.16 6.76 460.92 1.53 1.00 ~ 462.96 62.57 163440.00 73.38 1930.00 26000.00 58400.00 338.00 1120.00 5.13 BAl "U>DCGL" AREA B 66 30 - 90 1139 1139 0.27 186000.00 149.00 0.05 4740.00 64300.00 807.00 5.93 480.00 481.00 26.70 369.13 1235.33 7.19 O.o3 13.79 "U<DCGL" AREA C 20 10-40 34.7 34.7 0.06 0.06 0.43 0.43 7.24 0.89 77986.67 86.78 0.20 3346.67 22266.67 115640.00 1.00 343.67 105.65 194200.00 99.37 0.05 107.53 14.85 35.8 2.27 2.3 6.96 -0.06 7.0 7 343.13 0.84 l.00 2930.00 17300.00 96200.00 169.23 944.00 WAA U>DCG L 99 60 -120 147 147 35.8 135666.67 94.40 0.05 346.50 38433.33 81.83 0.10 7.01 359.33 360.67 270.00 4.D9 0.03 14.97 WAA-WE5T 10 10 -30 58.6 58.6 10.2 10.2 0.45 0.5 7.32 100.00 28.60 324.00 61.60 16.90
~
51.1 51.1 72.2 72.2 0.45 0.4 7.25 18.90 1890.00 14700.00 15300.00 20.20 206.00 --
WAA "U<DCGL" EAST 20 20 - 60 26.70 24700.00 3.72 0.05 100.00 9130.00
-0.44 8.28 277.00 278.00 30.40 654 .00 19.47 WATF WU-1206 "SOUTH" 4 1-5 62.0 62.0 11.57 11.57 1.00 1.00 7.40 -
8.28 1339 29.0 61.7 61.7 0.32 0.3 6.93 - 9.04 3580.00 21050.00 52250-00 148.40 1281.50 5.91 WU-PBA 5 1-5 29.0 12.78 0.05 100.00 65550.00 22.29 114 312.75 2.19 11.93 7 .06 -0.43 7.55 290.00 28533 16.55 182500.00 160.25 0.20 2439.00 84050.00 72.80 B59.50 16.10 WAA"BLUFF" 104 90
- 210 14.27 156500.00 17.85 204.50 57300.00 0.25 6.55 579.50 1.26 1.00 1.00 580.50 WU-1206 "NORTH" 8 3 - 15 304 304 38.6 38.6 7.03 7.0 7.0S Definitions:
BAl - Burial Area 1
- c - degrees Celcius DCG L - Derived Concentration Goal Level gpm - gallons per minute LSI - La ngelier Saturation Index mg/l
- milligrams per liter PBA - Process Building Area RS I - Rymer Stability Index s.u. - Standa rd Units TDS- Total Dissolved Solids TOC - Total Organic Ca rbon U - Uranium Concentration
µg/l
- micrograms per liter
µm - microme ter UPl - Uranium Pond 111 Area UP2 - Uranium Pond #2 Area WAA - Western Alluvial Area WU - Western Upland Area eictraction and injection components in operation at any given at all times. The actual characte ristics of each process stream may vary based on the groundwater
- The averages presented in this summary are not necessarily representative of influent characteristics ti me sample location and pa ramete r, as specified in the MS Excel '-' workbook file this summary is limited to the most recent groundwater analytical results available for each
- With t he exception of uranium, nitrate, and flouride concentrations, t he data used to prepare entitled 2015-2-28 Comprehensive Analytical Data.xls1t .
are a and extraction stream.
reported for monitoring we lls considered re presentative of each groundwater remediation
- Influent characteristics for each process stream were estimated bv averaging concentrations on the location. Te mperature and pH values used for LSI and RSI 1 were taken from the same sampling event which occurred in either 2004, 200S, or 2007, depending Total Alkal inity, Calcium and TOS concentratio ns used for LSI and RSI calcu la tions at each location calculations were taken from the 2015 sampling event at each location wells.
2 Cimarron River may be significantly higher than the concentrations reported fo r site monitoring Sodium and chloride concentrations in groundwater extracted from wells located near the 3.0 - Treated Water Injection Criteria Revision D Water Treatment Design Basis 9/26/18 Cimarron Environmental Response Trust Injection Criteria HOL .. ,c vv,c VV,C vv,c VV>t ,-JL ,oc ,,,c WJL VVJL VVJL VVOL VVOL ,.,c VVOL ,.,c ,.,c VVJL VVJL 'J L -,JL W>t VV>t VVOt VV,t VV>t W>t limitation Basis Evaluation Eva luation Evaluation Evaluation Evaluation Evaluation Evaluatio n Eval uation Evaluation Evaluation Eva luation WSE Evaluation Evaluation Evaluation Evaluation Evaluation Evaluat ion Evaluation Evaluation Evaluation Evaluation Evaluation Evaluation Evaluation Evaluation Eval uation Eva luation Evaluation Evaluation NDn-
~uirate <e/Mn Allenosme Dissolved Tannin/ Heterotrophic Ana erobic Reducing Reducing Tri phosphate Parameter Ortho- Total Bicarbonate Total Carbonate Carbonate 3 1 Potassium Iron Total lron 2 Copper Manganese Sulfate' Silica Lignin pH TSS TSS Plate Count Growth Bacteria Bacteria (ATP)
Nitrate Ch lorides Phosphate Calcium LSI TDC Alkalinity Alkalinity TDS Conductivity ORP Hardness Hardness Hardness Sodium Magnesium mg/ L percent presence/ presence/
mg/L mg/L mg/L mg/L mg/L mg/L Units mg/ L mg/L mg/L (as Si0 2 ) mg/L S .U. µm mg/L [colonies/ml) population absence absence (colonies/m l) mg/L mg/L mg/L mg/L ---- mg/L (as caco, ) (as caco,) mg/l µS/cm mV (as CaC0 3 ) (as CaC0 3 ) [as CaCO,) mg/L mg/L mg/l (as Fe 2 ') mg/l sso ss so.oz S30 S5 6.5 - 9.0 SlO S45 S300 515% Absent Absent Sl00, 000 limit ss SlOO Sl Sl80 -0.5 - +0.5 Sl Sl80 S180 S4'1D :5750 150 - 220 Sl80 Sl80 sso Sl80 Sl S0.04 S0.10 SlSO Definitions:
BAl - Burial Area 1 CaC0 3 - calcium carbonate LSI - Langelier Saturation Index mg/L - milligrams per liter m l -milliliter mV - millivolt ORP - oxidation-reduction potential Si0 2 - silica dioxide s.u. - standard un its TDS - total dissolved solids TOC - total organic carbon TSS - total suspe nded solids
µg/l - micrograms per liter
µm - micrometer uS/cm - microSiemens per centimeter WATF - Western Area Treatment Facility WSE - Wa t er Systems Engineering Inc.
BOLD - treated effluent is expected to exceed injection criterion. Pretreatment will be required prior to injection unless otherwise noted .
BOLD - treated effluent ls expected to exceed injection criterion; however pretreatment will not be requ ired 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 requ irements for the injectate.
- Results of the WSE eva luation were presented in a letter report entitled Injection Well Water Quality Criteria (dated 9/ 25/18)
- The crite ria presented in this table apply only to treatment system effluents utilized for aquifer injection.
1 0RP is dependent on natural wat er chem istry and any induced subsurface treatment technologies employed.
2 Treated effluent is expected to exceed injection criterion for BAl only.
3 Treated effluent is elepected to exceed injection criterion for WATF only.
Memorandum BURNS ~ MS:DONNELL Document No.: BMCD-GWREMED-TM006 Revision: A Date: February 24, 2021 To: Jeff Lux, EPM 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) BURNS ~ M~DONNELL February 24, 2021 Page 2 of 11
- Estimation of Nitrate effluent concentrations 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 WAA 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) BURNS ~ M~DONNELL February 24, 2021 Page 3 of 11 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 WAA 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 Attachment 1.1 ).
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) BURNS ~ MSDONNELL February 24, 2021 Page 4 of 11 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 Attachment 2.0). 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 WAA 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) BURNS ~ M~DONNELL February 24, 2021 Page 5 of 11 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) BURNS ~ M~DONNELL February 24, 2021 Page 6 of 11 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 WAA 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 WAA 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 WAA 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 (WAA 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) BURNS ~ M~DONNELL February 24, 2021 Page 7 of 11 averaging within the capture zone of each alluvial remediation area (WAA 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 WAA 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 WATF influent concentrations, the influent nitrate concentration for this well is assumed to increase to a maximum of approximately 59 mg/L in Year 5 (see Attachment 4.2).
- GE-WAA 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 BURNS ~ MSDONNELL February 24, 2021 Page 8 of 11 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) BURNS ~ M~DONNELL February 24, 2021 Page 9 of 11 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 WAA 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) BURNS ~ M~DONNELL February 24, 2021 Page 10 of 11 weighted averaging results (see Section 6.3), WAA 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:
Attachment 1.1 - Remediation Area Extraction/Injection Components Attachment 2.0 - Particle Tracking Figures Attachment 3 .1 - BA 1 Remediation Areas Attachment 3 .2 - WA Remediation Areas Attachment 4.1 - Area-Weighted Concentration Averaging Results Attachment 4.2 - Time-Weighted Concentration Averaging Results Attachment 5.0- Remediation Duration Estimates Attachment 6.1 - Initial & Maximum Influent Concentrations Attachment 6.2 - Nitrate Influent Concentrations by Year Attachment 6.3 - Western Area Treatment Duration Analysis Attachment 6.4 - Western Area Nitrate Decay Analysis Attachment 7.0- BAI Uranium Analysis Attachment 8.0- Western Area, BAI Nitrate Effluent Analysis Attachment 9.0 - Stagnation Zone Analysis Figures