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{{#Wiki_filter:environmental properties management, LLC December 15, 2022 Mr. James Smith U.S. Nuclear Regulatory Commission 11555 Rockville Pike Rockville, MD 20852-2738 Mr. Paul Davis Oklahoma Department of Environmental Quality 707 North Robinson Oklahoma City, OK 73101 Re: Docket No. 07000925; License No. SNM-928 Cimarron Environmental Response Trust Proposal to Abandon Monitor Wells T-99, T-100, and 1371 - 1373 - Corrected
{{#Wiki_filter:properties management, LLCenvironmental
 
December 15, 2022
 
Mr. James Smith U.S. Nuclear Regulatory Commission 11555 Rockville Pike Rockville, MD 20852-2738
 
Mr. Paul Davis Oklahoma Department of Environmental Quality 707 North Robinson Oklahoma City, OK 73101
 
Re: Docket No. 07000925; License No. SNM-928 Cimarron Environmental Response Trust Proposal to Abandon Monitor Wells T-99, T-100, and 1371 - 1373 - Corrected


==Dear Sirs:==
==Dear Sirs:==
Solely as Trustee for the Cimarron Environmental Response Trust (CERT), Environmental Properties Management LLC (EPM) submits herein a proposal to abandon certain monitor wells at the Cimarron Site. Five monitor wells (Monitor Wells T-99, T-100, and 1371 through 1373) were installed near the Cimarron River in December 2014 as part of the 2014 Design Investigation project. EPM requests approval to abandon these monitor wells from both the U. S.
Solely as Trustee for the Cimarron Environmental Response Trust (CERT), Environmental Properties Management LLC (EPM) submits herein a proposal to abandon certain monitor wells at the Cimarron Site. Five monitor wells (Monitor Wells T-99, T-100, and 1371 through 1373) were installed near the Cimarron River in December 2014 as part of the 2014 Design Investigation project. EPM requests approval to abandon these monitor wells from both the U. S.
Nuclear Regulatory Commission (NRC) and the Oklahoma Department of Environmental Quality (DEQ).
Nuclear Regulatory Commission (NRC) and the Oklahoma Department of Environmental Quality (DEQ).
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* Nitrate - 22.9 milligrams per liter (mg/L)
* Nitrate - 22.9 milligrams per liter (mg/L)
* Fluoride - 4 mg/L Prior to 2014, the extent of groundwater exceeding State Criteria had not been defined for any of these contaminants of concern (COCs). The 2014 Design Investigation completed the delineation of these contaminants in groundwater.
* Fluoride - 4 mg/L Prior to 2014, the extent of groundwater exceeding State Criteria had not been defined for any of these contaminants of concern (COCs). The 2014 Design Investigation completed the delineation of these contaminants in groundwater.
Cimarron Environmental Response Trust Proposal to Abandon Monitor Wells T-99, T-100, 1371 and 1372


Cimarron Environmental Response Trust Proposal to Abandon Monitor Wells T-99, T-100, 1371 and 1372 Thirty-five (35) additional monitor wells were installed site-wide during the 2014 Design Investigation, and groundwater samples were collected from over 60 monitor wells for laboratory analysis.
Thirty-five (35) additional monitor wells were installed site-wide during the 2014 Design Investigation, and groundwater samples were collected from over 60 monitor wells for laboratory analysis.
Monitor Wells T-99 and T-100 Numerous flood events have occurred since Monitor Wells T-99 and T-100 (in the Western Alluvial Area) were installed. The deposition of sand during flood events has reconfigured the topography in the area surrounding these wells, resulting in the accumulation of sand around both wells. The following pictures show that all but 10-12 inches of the protector pipe for Monitor Well T-99 and all but 18-20 inches of the protector pipe for Monitor Well T-100 have been buried in sand. Re-grading the area to remove the sand is impractical; subsequent flood events will continue to bury them. EPM believes these wells should be abandoned before they are completely buried.
Monitor Wells T-99 and T-100 Numerous flood events have occurred since Monitor Wells T-99 and T-100 (in the Western Alluvial Area) were installed. The deposition of sand during flood events has reconfigured the topography in the area surrounding these wells, resulting in the accumulation of sand around both wells. The following pictures show that all but 10-12 inches of the protector pipe for Monitor Well T-99 and all but 18-20 inches of the protector pipe for Monitor Well T-100 have been buried in sand. Re-grading the area to remove the sand is impractical; subsequent flood events will continue to bury them. EPM believes these wells should be abandoned before they are completely buried.
Monitor Well T-99                                   Monitor Well T-100 contains a map showing the locations of these monitor wells and the analytical data obtained from samples collected from these monitor wells. Monitor Well T-99 has yielded groundwater averaging 33 mg/L nitrate and 36 ug/L uranium. Monitor Well T-100 has yielded groundwater averaging 26 mg/L nitrate and 29 ug/L uranium. Fluoride concentrations are less than 1 mg/L for groundwater in both wells. The concentration of uranium in both wells is far below the DCGL, but the concentration of uranium exceeds the MCL in T-99. The concentration of nitrate exceeds State Criteria in both monitor wells.
 
Monitor Well T-99 Monitor Well T-100 contains a map showing the locations of these monitor wells and the analytical data obtained from samples collected from these monitor wells. Monitor Well T-99 has yielded groundwater averaging 33 mg/L nitrate and 36 ug/L uranium. Monitor Well T-100 has yielded groundwater averaging 26 mg/L nitrate and 29 ug/L uranium. Fluoride concentrations are less than 1 mg/L for groundwater in both wells. The concentration of uranium in both wells is far below the DCGL, but the concentration of uranium exceeds the MCL in T-99. The concentration of nitrate exceeds State Criteria in both monitor wells.
EPM believes that there is no reason to maintain these two monitor wells. They are no longer sampled on a regular basis, and they do not serve any purpose in the decommissioning of the site because they are far outside of the extent of uranium exceeding the NRC Criterion. Additionally, because they are within the area in which nitrate (and uranium in T-99) exceed the State Criterion, they dont complete the delineation of the respective dissolved plumes to those levels.
EPM believes that there is no reason to maintain these two monitor wells. They are no longer sampled on a regular basis, and they do not serve any purpose in the decommissioning of the site because they are far outside of the extent of uranium exceeding the NRC Criterion. Additionally, because they are within the area in which nitrate (and uranium in T-99) exceed the State Criterion, they dont complete the delineation of the respective dissolved plumes to those levels.
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Cimarron Environmental Response Trust Proposal to Abandon Monitor Wells T-99, T-100, 1371 and 1372 Monitor Wells 1371 Through 1373 Numerous flood events have occurred since Monitor Wells 1371, 1372, and 1373 (in Burial Area
Page 2 of 4 Cimarron Environmental Response Trust Proposal to Abandon Monitor Wells T-99, T-100, 1371 and 1372
 
Monitor Wells 1371 Through 1373 Numerous flood events have occurred since Monitor Wells 1371, 1372, and 1373 (in Burial Area
#1) were installed. The deposition of sand and the scouring of channels during flood events has reconfigured the topography in the area surrounding these wells, creating ridges and gullies in the path to these wells. Re-grading the area to level the terrain is impractical; subsequent flood events will continue to both scour and deposit sand. These monitor wells are now a challenge to access on an annual basis when groundwater sampling crews obtain depth-to-water measurements for all monitor wells on the Site. EPM believes that paths to these wells should be cleared and the wells abandoned before ridges and scour-channels make it still more difficult to access the wells. contains a map showing the locations of these monitor wells and the analytical data obtained from samples collected from these monitor wells. Monitor 1371 has yielded groundwater averaging 27 ug/L uranium. Monitor Well 1373 has yielded groundwater averaging 43 ug/L uranium. Monitor Well 1372 has yielded groundwater averaging 10 ug/L uranium. Both nitrate and fluoride concentrations are less than 1 mg/L for groundwater in both wells. The concentration of uranium in all three wells is far below the DCGL.
#1) were installed. The deposition of sand and the scouring of channels during flood events has reconfigured the topography in the area surrounding these wells, creating ridges and gullies in the path to these wells. Re-grading the area to level the terrain is impractical; subsequent flood events will continue to both scour and deposit sand. These monitor wells are now a challenge to access on an annual basis when groundwater sampling crews obtain depth-to-water measurements for all monitor wells on the Site. EPM believes that paths to these wells should be cleared and the wells abandoned before ridges and scour-channels make it still more difficult to access the wells. contains a map showing the locations of these monitor wells and the analytical data obtained from samples collected from these monitor wells. Monitor 1371 has yielded groundwater averaging 27 ug/L uranium. Monitor Well 1373 has yielded groundwater averaging 43 ug/L uranium. Monitor Well 1372 has yielded groundwater averaging 10 ug/L uranium. Both nitrate and fluoride concentrations are less than 1 mg/L for groundwater in both wells. The concentration of uranium in all three wells is far below the DCGL.
EPM believes that there is no reason to maintain these two monitor wells. They are no longer sampled on a regular basis, and they do not serve any purpose in the decommissioning of the site because they are far outside of the extent of uranium exceeding the NRC Criterion. There is no nitrate or fluoride in Burial Area #1 and Monitor Well 1373 does not complete the delineation of the uranium in groundwater to the State Criterion.
EPM believes that there is no reason to maintain these two monitor wells. They are no longer sampled on a regular basis, and they do not serve any purpose in the decommissioning of the site because they are far outside of the extent of uranium exceeding the NRC Criterion. There is no nitrate or fluoride in Burial Area #1 and Monitor Well 1373 does not complete the delineation of the uranium in groundwater to the State Criterion.
Well Abandonment Upon approval by the NRC and the DEQ, all five wells will be abandoned in accordance with Oklahoma Water Resources Board regulations. Assuming approval by both agencies is received by the end of September 2022, the work will be completed during 2022, being funded by budget Task 6, Out of Scope Work. 93.2% of the cost will be paid out of the Federal Environmental Cost Account and 6.8% of the cost will be paid out of the State Environmental Cost Account.
Well Abandonment Upon approval by the NRC and the DEQ, all five wells will be abandoned in accordance with Oklahoma Water Resources Board regulations. Assuming approval by both agencies is received by the end of September 2022, the work will be completed during 2022, being funded by budget Task 6, Out of Scope Work. 93.2% of the cost will be paid out of the Federal Environmental Cost Account and 6.8% of the cost will be paid out of the State Environmental Cost Account.
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Cimarron Environmental Response Trust Proposal to Abandon Monitor Wells T-99, T-100, 1371 and 1372 If you have any questions or desire clarification, please call me at (405) 641-5152.
Sincerely,


Cimarron Environmental Response Trust Proposal to Abandon Monitor Wells T-99, T-100, 1371 and 1372 If you have any questions or desire clarification, please call me at (405) 641-5152.
Jeff Lux, P.E.
Sincerely, Jeff Lux, P.E.
Project Manager
Project Manager cc: Robert Evans, US Nuclear Regulatory Commission, Region IV Michael Broderick, Oklahoma Department of Environmental Quality Attachments:
 
cc: Robert Evans, US Nuclear Regulatory Commission, Region IV Michael Broderick, Oklahoma Department of Environmental Quality
 
Attachments:
* Attachment 1 - Monitor Wells T-99 and T-100 Map and Data
* Attachment 1 - Monitor Wells T-99 and T-100 Map and Data
* Attachment 2 - Monitor Wells 1371, 1372, and 1373 Map and Data Page 4 of 4
* Attachment 2 - Monitor Wells 1371, 1372, and 1373 Map and Data


Cimarron Environmental Response Trust Proposal to Abandon Monitor Wells T-99, T-100, 1371 and 1372 ATTACHMENT 1 MONITOR WELLS T-99 AND T-100 MAP AND DATA
Page 4 of 4 Cimarron Environmental Response Trust Proposal to Abandon Monitor Wells T-99, T-100, 1371 and 1372


1,040 Feet MAP PRODUCED
ATTACHMENT 1 MONITOR WELLS T-99 AND T-100 MAP AND DATA 1,040 Feet MAP PRODUCED
* 5/39019 Document Path: Z:\Clients\ENS\CERT\_Clientlnfo\Sites\Database\Geospatial\Maps & Dwgs\ArcGIS\BMCD_Files\Arcdocs\2018\2018 Base Maps\2018 Base Map 17X22.mxd
* 5/39019


Cimarron Environmental Response Trust Analytical Data for Monitor Wells T-99 and T-100 Monitor                                          Total Date        Analyte      Result                  DL    Unit Qual Well                                          Uranium T-99      12/16/2014                    0.552                0.033  mg/L Fluoride T-100      12/16/2014                    0.772                0.033  mg/L 11/6/2018                      37.3                  1.7  mg/L 12/16/2014                      22.3                0.425  mg/L 3/26/2015                      24.1                0.850  mg/L 2/18/2016                      36.8                0.850  mg/L 5/9/2016                        46.6                0.850  mg/L 8/9/2016                        38.4                1.700  mg/L 10/17/2016                      31.4                1.700  mg/L Nitrate/Nitrite 2/7/2017                        30.8                0.425  mg/L 4/19/2017                      18.1                0.425  mg/L T-99 8/1/2017                        34.3                1.700  mg/L 11/8/2017                      40.8                0.850  mg/L 2/6/2018                        46.2                1.700  mg/L 5/9/2018                        37.2                0.850  mg/L 8/21/2018                      18.9                1.700  mg/L 33.1  Mean 46.6  Maximum 9.3  Standard Deviation (a) 51.7  Mean + 2a 11/6/2018                      21.3                  0.85  mg/L 12/16/2014                      49.3                0.850  mg/L 3/26/2015                      51.6                1.700  mg/L  J+
Document Path: Z:\\Clients\\ENS\\CERT\\_Clientlnfo\\Sites\\Database\\Geospatial\\Maps & Dwgs\\ArcGIS\\BMCD_Files\\Arcdocs\\2018\\2018 Base Maps\\2018 Base Map 17X22.mxd Cimarron Environmental Response Trust Analytical Data for Monitor Wells T-99 and T-100
2/18/2016                      32.3                0.425  mg/L 5/9/2016                        25.4                0.850  mg/L 8/9/2016                        14.6                0.850  mg/L 10/17/2016                      21.9                0.425  mg/L Nitrate/Nitrite 2/7/2017                        27.3                0.425  mg/L 4/19/2017                      22.5                0.850  mg/L T-100 8/1/2017                        25.4                1.700  mg/L 11/8/2017                      18.7                0.850  mg/L 2/6/2018                        20.6                1.700  mg/L 5/9/2018                        16.0                0.850  mg/L 8/21/2018                      20.7                1.700  mg/L 26.3  Mean 51.6  Maximum 11.2  Standard Deviation (a) 48.7  Mean + 2a Page 1 of 2


Cimarron Environmental Response Trust Analytical Data for Monitor Wells T-99 and T-100 Monitor                                        Total Date       Analyte   Result                   DL   Unit Qual Well                                        Uranium 12/16/2014     Uranium-238  48.1       48.1      0.067  ug/L 3/26/2015     Uranium-238  46.6      46.6      0.067  ug/L 2/18/2016     Uranium-238  36.8       36.8      0.067  ug/L 5/9/2016       Uranium-238  35.1      35.1      0.067  ug/L 8/9/2016       Uranium-238  33.2      33.2      0.067  ug/L 10/17/2016     Uranium-238  35.1       35.1      0.067  ug/L 2/7/2017       Uranium-235  0.288      35.088      0.010  ug/L 2/7/2017       Uranium-238  34.8                  0.067  ug/L 4/19/2017     Uranium-235  0.290      35.790      0.010  ug/L 4/19/2017     Uranium-238  35.5                  0.067  ug/L 8/1/2017      Uranium-235  0.260      32.260      0.010  ug/L 8/1/2017      Uranium-238  32.0                  0.067  ug/L 11/8/2017      Uranium-235  0.269      32.769      0.010  ug/L T-99 11/8/2017      Uranium-238  32.5                  0.067  ug/L 2/6/2018      Uranium-235  0.286      33.686      0.010  ug/L 2/6/2018      Uranium-238  33.4                  0.067  ug/L 5/9/2018      Uranium-235  0.303      34.503      0.010  ug/L 5/9/2018      Uranium-238  34.2                  0.067  ug/L 8/21/2018      Uranium-235  0.205      25.705      0.010  ug/L 8/21/2018      Uranium-238  25.5                  0.067  ug/L 11/6/2018      Uranium-235  0.312      34.612      0.01  ug/L 11/6/2018      Uranium-238  34.3                  0.067  ug/L 35.7  Mean 48.1   Maximum 5.6  Standard Deviation (a) 46.9  Mean + 2a 12/16/2014    Uranium-238  30.8       30.8      0.067  pci/L 3/26/2015      Uranium-238  31.6       31.6      0.067  ug/L   J 4/19/2017      Uranium-235  0.189      24.789      0.010  ug/L 4/19/2017      Uranium-238  24.6                  0.067  ug/L T-100 29.1  Mean 31.6   Maximum 3.7  Standard Deviation (o) 36.5  Mean + 2a Page 2 of 2
Monitor Date Analyte Result Total Well Uranium DL Unit Qual T-99 12/16/2014 Fluoride 0.552 0.033 mg/L T-100 12/16/2014 0.772 0.033 mg/L 11/6/2018 37.3 1.7 mg/L 12/16/2014 22.3 0.425 mg/L 3/26/2015 24.1 0.850 mg/L 2/18/2016 36.8 0.850 mg/L 5/9/2016 46.6 0.850 mg/L 8/9/2016 38.4 1.700 mg/L 10/17/2016 31.4 1.700 mg/LNitrate/Nitrite 2/7/2017 30.8 0.425 mg/L T-99 4/19/2017 18.1 0.425 mg/L 8/1/2017 34.3 1.700 mg/L 11/8/2017 40.8 0.850 mg/L 2/6/2018 46.2 1.700 mg/L 5/9/2018 37.2 0.850 mg/L 8/21/2018 18.9 1.700 mg/L 33.1 Mean 46.6 Maximum 9.3 Standard Deviation (a) 51.7 Mean + 2a 11/6/2018 21.3 0.85 mg/L 12/16/2014 49.3 0.850 mg/L 3/26/2015 51.6 1.700 mg/L J+
2/18/2016 32.3 0.425 mg/L 5/9/2016 25.4 0.850 mg/L 8/9/2016 14.6 0.850 mg/L 10/17/2016 21.9 0.425 mg/LNitrate/Nitrite 2/7/2017 27.3 0.425 mg/L T-100 4/19/2017 22.5 0.850 mg/L 8/1/2017 25.4 1.700 mg/L 11/8/2017 18.7 0.850 mg/L 2/6/2018 20.6 1.700 mg/L 5/9/2018 16.0 0.850 mg/L 8/21/2018 20.7 1.700 mg/L 26.3 Mean 51.6 Maximum 11.2 Standard Deviation (a) 48.7 Mean + 2a


Cimarron Environmental Response Trust Proposal to Abandon Monitor Wells T-99, T-100, 1371 and 1372 ATTACHMENT 2 MONITOR WELLS 1371, 1372, AND 1373 MAP AND DATA
Page 1 of 2 Cimarron Environmental Response Trust Analytical Data for Monitor Wells T-99 and T-100


Monitor Wells to be Abandoned
Monitor
                                                                                                                                      -I3S5       +-1356 02W35           <>>3?     ->>B2M
 
                                                                    -*G2W34             r02W36
Well Date Analyte Result TotalUranium DL Unit Qual 12/16/2014 Uranium-238 48.1 48.1 0.067 ug/L 3/26/2015 Uranium-238 46.6 46.6 0.067 ug/L 2/18/2016 Uranium-238 36.8 36.8 0.067 ug/L 5/9/2016 Uranium-238 35.1 35.1 0.067 ug/L 8/9/2016 Uranium-238 33.2 33.2 0.067 ug/L 10/17/2016 Uranium-238 35.1 35.1 0.067 ug/L 2/7/2017 Uranium-235 0.288 35.088 0.010 ug/L 2/7/2017 Uranium-238 34.8 0.067 ug/L 4/19/2017 Uranium-235 0.290 35.790 0.010 ug/L 4/19/2017 Uranium-238 35.5 0.067 ug/L 8/1/2017 Uranium-235 0.260 32.260 0.010 ug/L 8/1/2017 Uranium-238 32.0 0.067 ug/L T-99 11/8/2017 Uranium-235 0.269 32.769 0.010 ug/L 11/8/2017 Uranium-238 32.5 0.067 ug/L 2/6/2018 Uranium-235 0.286 33.686 0.010 ug/L 2/6/2018 Uranium-238 33.4 0.067 ug/L 5/9/2018 Uranium-235 0.303 34.503 0.010 ug/L 5/9/2018 Uranium-238 34.2 0.067 ug/L 8/21/2018 Uranium-235 0.205 25.705 0.010 ug/L 8/21/2018 Uranium-238 25.5 0.067 ug/L 11/6/2018 Uranium-235 0.312 34.612 0.01 ug/L 11/6/2018 Uranium-238 34.3 0.067 ug/L 35.7 Mean 48.1 Maximum 5.6 Standard Deviation (a) 46.9 Mean + 2a 12/16/2014 Uranium-238 30.8 30.8 0.067 pci/L 3/26/2015 Uranium-238 31.6 31.6 0.067 ug/L J 4/19/2017 Uranium-235 0.189 24.789 0.010 ug/L T-100 4/19/2017 Uranium-238 24.6 0.067 ug/L 29.1 Mean 31.6 Maximum 3.7 Standard Deviation (o) 36.5 Mean + 2a
                                                                        *-02W2l             t02W24       -*-02VVl3     +G2W*4   *^11 G2VV22       -Cu%V'7   -C2W06 i02-VC7   *02VS'03
 
                                                                                              *021715
Page 2 of 2 Cimarron Environmental Response Trust Proposal to Abandon Monitor Wells T-99, T-100, 1371 and 1372
                                                                              ** OZ/v'22
 
                              ; ' ' * -v> *.       "'A iVQiWOI
ATTACHMENT 2 MONITOR WELLS 1371, 1372, AND 1373 MAP AND DATA Monitor Wells to be Abandoned
 
-I3S5 +-1356
 
02W35 <>>3? ->>B2M
 
-*G2W34 r02W36
 
*-02W2l t02W24 -*-02VVl3 +G2W*4 *^11
 
G2VV22 -Cu%V'7 -C2W06 i02-VC7 *02VS'03
 
** OZ/v'22*021715
 
; ' ' * -v> *. "'A iVQiWOI
* V-H
* V-H
                                                                                                                                                                            #115 2018 BASE MAP - BA1 AREA CIMARRON ENVIRONMENTAL RESPONSE TRUST CIMARRON SITE, OKLAHOMA
                                                                                                                                                                  ^BURNS VVMEDONNELL.
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Cimarron Environmental Response Trust Analytical Data for Monitor Wells 1371,1372, and 1373 Monitor                                           Total Date      Analyte      Result                Unit   Qual Well                                           Uranium 1371                                       0.41                 mg/L 1372         12/16/2014   Fluoride         0.42                  mg/L 1373                                        0.37                  mg/L 1371                                        0.05                 mg/L     U 1372        12/16/2014   Nitrate-Nitrite 0.05                  mg/L    U 1373                                       0.05                 mg/L     u 12/16/2014   Uranium-238     30.8     30.8       ug/L 3/23/2015     Uranium-238     31.3     31.3       ug/L Uranium-235       0.2                 ug/L 4/19/2017                                21.5 Uranium-238     21.3                 ug/L 1371 27.9 Mean 31.3 Maximum 5.5 Standard Deviation (o) 38.9 Mean + 2a 12/16/2014   Uranium-238     10.5     10.5       ug/L 3/23/2015     Uranium-238       8.8       8.8       ug/L Uranium-235       0.1                 ug/L     J 4/19/2017                                8.8 Uranium-238       8.8                 ug/L 1372 9.4 Mean 10.5 Maximum 1.0 Standard Deviation (or) 11.3 Mean + 2o Page 1 of 2
#115
 
2018 BASE MAP - BA1 AREA CIMARRON ENVIRONMENTAL RESPONSE TRUST CIMARRON SITE, OKLAHOMA
 
^BURNS VVMEDONNELL.
 
210 280 iFeet
 
Document Path: Z:\\Clients\\ENS\\CERT\\_Clientlnfo\\Sites\\Database\\Geospatial\\Maps & Dwgs\\ArcGIS\\BMCD_Fi!es\\Arcdocs\\2018\\2018 Base Maps\\2018 Base Map - BA1 11x17.mxd Cimarron Environmental Response Trust Analytical Data for Monitor Wells 1371,1372, and 1373
 
Monitor Total Unit Qual Well Date Analyte ResultUranium 1371 0.41 mg/L 1372 0.42 mg/L12/16/2014 Fluoride 1373 0.37 mg/L 1371 0.05 mg/L U 1372 0.05 mg/L U12/16/2014 Nitrate-Nitrite 1373 0.05 mg/L u 12/16/2014 Uranium-238 30.8 30.8 ug/L 3/23/2015 Uranium-238 31.3 31.3 ug/L
 
4/19/2017 Uranium-235 0.2 21.5 ug/LUranium-238 21.3 ug/L 1371 27.9 Mean
 
31.3 Maximum 5.5 Standard Deviation (o) 38.9 Mean + 2a 12/16/2014 Uranium-238 10.5 10.5 ug/L 3/23/2015 Uranium-238 8.8 8.8 ug/L
 
4/19/2017 Uranium-235 0.1 8.8 ug/L JUranium-238 8.8 ug/L 1372 9.4 Mean
 
10.5 Maximum 1.0 Standard Deviation (or) 11.3 Mean + 2o
 
Page 1 of 2 Cimarron Environmental Response Trust Analytical Data for Monitor Wells 1371,1372, and 1373
 
Monitor Total
 
Well Date Analyte ResultUranium Unit Qual 12/16/2014 Uranium-238 31.2 31.2 ug/L 3/23/2015 Uranium-238 29.0 29.0 ug/L U 2/17/2016 Uranium-238 57.5 57.5 ug/L 5/9/2016 Uranium-238 55.1 55.1 ug/L 8/11/2016 Uranium-238 64.3 64.3 ug/L 10/18/2016 Uranium-238 33.8 33.8 ug/L 12/15/2016 Uranium-235 0.3 27.9 ug/L 12/15/2016 Uranium-238 27.6 ug/L 2/7/2017 Uranium-235 0.4 31.3 ug/L 2/7/2017 Uranium-238 30.9 ug/L 4/19/2017 Uranium-235 0.3 25.3 ug/L 4/19/2017 Uranium-238 25.0 ug/L 8/2/2017 Uranium-235 0.5 44.1 ug/L 1373 8/2/2017 Uranium-238 43.6 ug/L 11/9/2017 Uranium-235 0.4 37.6 ug/L 11/9/2017 Uranium-238 37.2 ug/L 2/7/2018 Uranium-235 0.7 64.4 ug/L 2/7/2018 Uranium-238 63.7 ug/L 5/8/2018 Uranium-235 0.8 68.6 ug/L 5/8/2018 Uranium-238 67.8 ug/L 8/27/2018 Uranium-235 0.4 28.9 ug/L 8/27/2018 Uranium-238 28.5 ug/L 11/7/2018 Uranium-235 0.5 40.3 ug/L 11/7/2018 Uranium-238 39.8 ug/L 42.6 Mean 68.6 Maximum 15.3 Standard Deviation (o) 73.1 Mean + 2o


Cimarron Environmental Response Trust Analytical Data for Monitor Wells 1371,1372, and 1373 Monitor                                        Total Date      Analyte  Result                  Unit  Qual Well                                        Uranium 12/16/2014    Uranium-238  31.2      31.2        ug/L 3/23/2015    Uranium-238  29.0      29.0        ug/L    U 2/17/2016    Uranium-238  57.5      57.5        ug/L 5/9/2016      Uranium-238  55.1      55.1        ug/L 8/11/2016    Uranium-238  64.3      64.3        ug/L 10/18/2016    Uranium-238  33.8      33.8        ug/L 12/15/2016    Uranium-235  0.3                  ug/L 27.9 12/15/2016    Uranium-238  27.6                  ug/L 2/7/2017      Uranium-235  0.4                  ug/L 31.3 2/7/2017      Uranium-238  30.9                  ug/L 4/19/2017      Uranium-235  0.3                  ug/L 25.3 4/19/2017      Uranium-238  25.0                  ug/L 8/2/2017      Uranium-235  0.5                  ug/L 44.1 8/2/2017      Uranium-238  43.6                  ug/L 1373 11/9/2017    Uranium-235  0.4                  ug/L 37.6 11/9/2017    Uranium-238  37.2                  ug/L 2/7/2018      Uranium-235  0.7                  ug/L 64.4 2/7/2018      Uranium-238  63.7                  ug/L 5/8/2018      Uranium-235  0.8                  ug/L 68.6 5/8/2018      Uranium-238  67.8                  ug/L 8/27/2018      Uranium-235  0.4                  ug/L 28.9 8/27/2018      Uranium-238  28.5                  ug/L 11/7/2018    Uranium-235  0.5                  ug/L 40.3 11/7/2018    Uranium-238  39.8                  ug/L 42.6  Mean 68.6  Maximum 15.3  Standard Deviation (o) 73.1  Mean + 2o Page 2 of 2}}
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Revision as of 15:07, 15 November 2024

Cimarron Environmental Response Trust, Proposal to Abandon Monitor Wells T-99, T-100, and 1371 - 1373 - Corrected
ML22350A072
Person / Time
Site: 07000925
Issue date: 12/15/2022
From: Lux J
Environmental Properties Management
To: Davis P, James Smith
Document Control Desk, Office of Nuclear Material Safety and Safeguards, State of OK, Dept of Environmental Quality (DEQ)
References
Download: ML22350A072 (1)
v • d • e


Text

properties management, LLCenvironmental

December 15, 2022

Mr. James Smith U.S. Nuclear Regulatory Commission 11555 Rockville Pike Rockville, MD 20852-2738

Mr. Paul Davis Oklahoma Department of Environmental Quality 707 North Robinson Oklahoma City, OK 73101

Re: Docket No. 07000925; License No. SNM-928 Cimarron Environmental Response Trust Proposal to Abandon Monitor Wells T-99, T-100, and 1371 - 1373 - Corrected

Dear Sirs:

Solely as Trustee for the Cimarron Environmental Response Trust (CERT), Environmental Properties Management LLC (EPM) submits herein a proposal to abandon certain monitor wells at the Cimarron Site. Five monitor wells (Monitor Wells T-99, T-100, and 1371 through 1373) were installed near the Cimarron River in December 2014 as part of the 2014 Design Investigation project. EPM requests approval to abandon these monitor wells from both the U. S.

Nuclear Regulatory Commission (NRC) and the Oklahoma Department of Environmental Quality (DEQ).

The NRC noted that the heading for the table that listed analytical data for Monitor Wells 1371, 1372, and 1372 in the September 8, 2022, letter proposing to abandon these monitor wells did not include 1373. This submittal is a corrected version of that September 8, 2022, letter.

Background

The NRC Criterion of 180 picocuries per liter (pCi/L) for uranium in groundwater was established and stipulated in License SNM-928 in 1995. Prior to 2014, the extent of uranium in groundwater exceeding the NRC Criterion had been defined. However, the DEQ had not established remediation criteria for uranium, nitrate, and fluoride until after the CERT was established in 2011. The State Criteria for these contaminants are:

  • Uranium - 30 micrograms per liter (pg/L)
  • Nitrate - 22.9 milligrams per liter (mg/L)
  • Fluoride - 4 mg/L Prior to 2014, the extent of groundwater exceeding State Criteria had not been defined for any of these contaminants of concern (COCs). The 2014 Design Investigation completed the delineation of these contaminants in groundwater.

Cimarron Environmental Response Trust Proposal to Abandon Monitor Wells T-99, T-100, 1371 and 1372

Thirty-five (35) additional monitor wells were installed site-wide during the 2014 Design Investigation, and groundwater samples were collected from over 60 monitor wells for laboratory analysis.

Monitor Wells T-99 and T-100 Numerous flood events have occurred since Monitor Wells T-99 and T-100 (in the Western Alluvial Area) were installed. The deposition of sand during flood events has reconfigured the topography in the area surrounding these wells, resulting in the accumulation of sand around both wells. The following pictures show that all but 10-12 inches of the protector pipe for Monitor Well T-99 and all but 18-20 inches of the protector pipe for Monitor Well T-100 have been buried in sand. Re-grading the area to remove the sand is impractical; subsequent flood events will continue to bury them. EPM believes these wells should be abandoned before they are completely buried.

Monitor Well T-99 Monitor Well T-100 contains a map showing the locations of these monitor wells and the analytical data obtained from samples collected from these monitor wells. Monitor Well T-99 has yielded groundwater averaging 33 mg/L nitrate and 36 ug/L uranium. Monitor Well T-100 has yielded groundwater averaging 26 mg/L nitrate and 29 ug/L uranium. Fluoride concentrations are less than 1 mg/L for groundwater in both wells. The concentration of uranium in both wells is far below the DCGL, but the concentration of uranium exceeds the MCL in T-99. The concentration of nitrate exceeds State Criteria in both monitor wells.

EPM believes that there is no reason to maintain these two monitor wells. They are no longer sampled on a regular basis, and they do not serve any purpose in the decommissioning of the site because they are far outside of the extent of uranium exceeding the NRC Criterion. Additionally, because they are within the area in which nitrate (and uranium in T-99) exceed the State Criterion, they dont complete the delineation of the respective dissolved plumes to those levels.

Page 2 of 4 Cimarron Environmental Response Trust Proposal to Abandon Monitor Wells T-99, T-100, 1371 and 1372

Monitor Wells 1371 Through 1373 Numerous flood events have occurred since Monitor Wells 1371, 1372, and 1373 (in Burial Area

  1. 1) were installed. The deposition of sand and the scouring of channels during flood events has reconfigured the topography in the area surrounding these wells, creating ridges and gullies in the path to these wells. Re-grading the area to level the terrain is impractical; subsequent flood events will continue to both scour and deposit sand. These monitor wells are now a challenge to access on an annual basis when groundwater sampling crews obtain depth-to-water measurements for all monitor wells on the Site. EPM believes that paths to these wells should be cleared and the wells abandoned before ridges and scour-channels make it still more difficult to access the wells. contains a map showing the locations of these monitor wells and the analytical data obtained from samples collected from these monitor wells. Monitor 1371 has yielded groundwater averaging 27 ug/L uranium. Monitor Well 1373 has yielded groundwater averaging 43 ug/L uranium. Monitor Well 1372 has yielded groundwater averaging 10 ug/L uranium. Both nitrate and fluoride concentrations are less than 1 mg/L for groundwater in both wells. The concentration of uranium in all three wells is far below the DCGL.

EPM believes that there is no reason to maintain these two monitor wells. They are no longer sampled on a regular basis, and they do not serve any purpose in the decommissioning of the site because they are far outside of the extent of uranium exceeding the NRC Criterion. There is no nitrate or fluoride in Burial Area #1 and Monitor Well 1373 does not complete the delineation of the uranium in groundwater to the State Criterion.

Well Abandonment Upon approval by the NRC and the DEQ, all five wells will be abandoned in accordance with Oklahoma Water Resources Board regulations. Assuming approval by both agencies is received by the end of September 2022, the work will be completed during 2022, being funded by budget Task 6, Out of Scope Work. 93.2% of the cost will be paid out of the Federal Environmental Cost Account and 6.8% of the cost will be paid out of the State Environmental Cost Account.

(The rest of this page was left blank intentionally.)

Cimarron Environmental Response Trust Proposal to Abandon Monitor Wells T-99, T-100, 1371 and 1372 If you have any questions or desire clarification, please call me at (405) 641-5152.

Sincerely,

Jeff Lux, P.E.

Project Manager

cc: Robert Evans, US Nuclear Regulatory Commission, Region IV Michael Broderick, Oklahoma Department of Environmental Quality

Attachments:

  • Attachment 1 - Monitor Wells T-99 and T-100 Map and Data
  • Attachment 2 - Monitor Wells 1371, 1372, and 1373 Map and Data

Page 4 of 4 Cimarron Environmental Response Trust Proposal to Abandon Monitor Wells T-99, T-100, 1371 and 1372

ATTACHMENT 1 MONITOR WELLS T-99 AND T-100 MAP AND DATA 1,040 Feet MAP PRODUCED

  • 5/39019

Document Path: Z:\\Clients\\ENS\\CERT\\_Clientlnfo\\Sites\\Database\\Geospatial\\Maps & Dwgs\\ArcGIS\\BMCD_Files\\Arcdocs\\2018\\2018 Base Maps\\2018 Base Map 17X22.mxd Cimarron Environmental Response Trust Analytical Data for Monitor Wells T-99 and T-100

Monitor Date Analyte Result Total Well Uranium DL Unit Qual T-99 12/16/2014 Fluoride 0.552 0.033 mg/L T-100 12/16/2014 0.772 0.033 mg/L 11/6/2018 37.3 1.7 mg/L 12/16/2014 22.3 0.425 mg/L 3/26/2015 24.1 0.850 mg/L 2/18/2016 36.8 0.850 mg/L 5/9/2016 46.6 0.850 mg/L 8/9/2016 38.4 1.700 mg/L 10/17/2016 31.4 1.700 mg/LNitrate/Nitrite 2/7/2017 30.8 0.425 mg/L T-99 4/19/2017 18.1 0.425 mg/L 8/1/2017 34.3 1.700 mg/L 11/8/2017 40.8 0.850 mg/L 2/6/2018 46.2 1.700 mg/L 5/9/2018 37.2 0.850 mg/L 8/21/2018 18.9 1.700 mg/L 33.1 Mean 46.6 Maximum 9.3 Standard Deviation (a) 51.7 Mean + 2a 11/6/2018 21.3 0.85 mg/L 12/16/2014 49.3 0.850 mg/L 3/26/2015 51.6 1.700 mg/L J+

2/18/2016 32.3 0.425 mg/L 5/9/2016 25.4 0.850 mg/L 8/9/2016 14.6 0.850 mg/L 10/17/2016 21.9 0.425 mg/LNitrate/Nitrite 2/7/2017 27.3 0.425 mg/L T-100 4/19/2017 22.5 0.850 mg/L 8/1/2017 25.4 1.700 mg/L 11/8/2017 18.7 0.850 mg/L 2/6/2018 20.6 1.700 mg/L 5/9/2018 16.0 0.850 mg/L 8/21/2018 20.7 1.700 mg/L 26.3 Mean 51.6 Maximum 11.2 Standard Deviation (a) 48.7 Mean + 2a

Page 1 of 2 Cimarron Environmental Response Trust Analytical Data for Monitor Wells T-99 and T-100

Monitor

Well Date Analyte Result TotalUranium DL Unit Qual 12/16/2014 Uranium-238 48.1 48.1 0.067 ug/L 3/26/2015 Uranium-238 46.6 46.6 0.067 ug/L 2/18/2016 Uranium-238 36.8 36.8 0.067 ug/L 5/9/2016 Uranium-238 35.1 35.1 0.067 ug/L 8/9/2016 Uranium-238 33.2 33.2 0.067 ug/L 10/17/2016 Uranium-238 35.1 35.1 0.067 ug/L 2/7/2017 Uranium-235 0.288 35.088 0.010 ug/L 2/7/2017 Uranium-238 34.8 0.067 ug/L 4/19/2017 Uranium-235 0.290 35.790 0.010 ug/L 4/19/2017 Uranium-238 35.5 0.067 ug/L 8/1/2017 Uranium-235 0.260 32.260 0.010 ug/L 8/1/2017 Uranium-238 32.0 0.067 ug/L T-99 11/8/2017 Uranium-235 0.269 32.769 0.010 ug/L 11/8/2017 Uranium-238 32.5 0.067 ug/L 2/6/2018 Uranium-235 0.286 33.686 0.010 ug/L 2/6/2018 Uranium-238 33.4 0.067 ug/L 5/9/2018 Uranium-235 0.303 34.503 0.010 ug/L 5/9/2018 Uranium-238 34.2 0.067 ug/L 8/21/2018 Uranium-235 0.205 25.705 0.010 ug/L 8/21/2018 Uranium-238 25.5 0.067 ug/L 11/6/2018 Uranium-235 0.312 34.612 0.01 ug/L 11/6/2018 Uranium-238 34.3 0.067 ug/L 35.7 Mean 48.1 Maximum 5.6 Standard Deviation (a) 46.9 Mean + 2a 12/16/2014 Uranium-238 30.8 30.8 0.067 pci/L 3/26/2015 Uranium-238 31.6 31.6 0.067 ug/L J 4/19/2017 Uranium-235 0.189 24.789 0.010 ug/L T-100 4/19/2017 Uranium-238 24.6 0.067 ug/L 29.1 Mean 31.6 Maximum 3.7 Standard Deviation (o) 36.5 Mean + 2a

Page 2 of 2 Cimarron Environmental Response Trust Proposal to Abandon Monitor Wells T-99, T-100, 1371 and 1372

ATTACHMENT 2 MONITOR WELLS 1371, 1372, AND 1373 MAP AND DATA Monitor Wells to be Abandoned

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2018 BASE MAP - BA1 AREA CIMARRON ENVIRONMENTAL RESPONSE TRUST CIMARRON SITE, OKLAHOMA

^BURNS VVMEDONNELL.

210 280 iFeet

Document Path: Z:\\Clients\\ENS\\CERT\\_Clientlnfo\\Sites\\Database\\Geospatial\\Maps & Dwgs\\ArcGIS\\BMCD_Fi!es\\Arcdocs\\2018\\2018 Base Maps\\2018 Base Map - BA1 11x17.mxd Cimarron Environmental Response Trust Analytical Data for Monitor Wells 1371,1372, and 1373

Monitor Total Unit Qual Well Date Analyte ResultUranium 1371 0.41 mg/L 1372 0.42 mg/L12/16/2014 Fluoride 1373 0.37 mg/L 1371 0.05 mg/L U 1372 0.05 mg/L U12/16/2014 Nitrate-Nitrite 1373 0.05 mg/L u 12/16/2014 Uranium-238 30.8 30.8 ug/L 3/23/2015 Uranium-238 31.3 31.3 ug/L

4/19/2017 Uranium-235 0.2 21.5 ug/LUranium-238 21.3 ug/L 1371 27.9 Mean

31.3 Maximum 5.5 Standard Deviation (o) 38.9 Mean + 2a 12/16/2014 Uranium-238 10.5 10.5 ug/L 3/23/2015 Uranium-238 8.8 8.8 ug/L

4/19/2017 Uranium-235 0.1 8.8 ug/L JUranium-238 8.8 ug/L 1372 9.4 Mean

10.5 Maximum 1.0 Standard Deviation (or) 11.3 Mean + 2o

Page 1 of 2 Cimarron Environmental Response Trust Analytical Data for Monitor Wells 1371,1372, and 1373

Monitor Total

Well Date Analyte ResultUranium Unit Qual 12/16/2014 Uranium-238 31.2 31.2 ug/L 3/23/2015 Uranium-238 29.0 29.0 ug/L U 2/17/2016 Uranium-238 57.5 57.5 ug/L 5/9/2016 Uranium-238 55.1 55.1 ug/L 8/11/2016 Uranium-238 64.3 64.3 ug/L 10/18/2016 Uranium-238 33.8 33.8 ug/L 12/15/2016 Uranium-235 0.3 27.9 ug/L 12/15/2016 Uranium-238 27.6 ug/L 2/7/2017 Uranium-235 0.4 31.3 ug/L 2/7/2017 Uranium-238 30.9 ug/L 4/19/2017 Uranium-235 0.3 25.3 ug/L 4/19/2017 Uranium-238 25.0 ug/L 8/2/2017 Uranium-235 0.5 44.1 ug/L 1373 8/2/2017 Uranium-238 43.6 ug/L 11/9/2017 Uranium-235 0.4 37.6 ug/L 11/9/2017 Uranium-238 37.2 ug/L 2/7/2018 Uranium-235 0.7 64.4 ug/L 2/7/2018 Uranium-238 63.7 ug/L 5/8/2018 Uranium-235 0.8 68.6 ug/L 5/8/2018 Uranium-238 67.8 ug/L 8/27/2018 Uranium-235 0.4 28.9 ug/L 8/27/2018 Uranium-238 28.5 ug/L 11/7/2018 Uranium-235 0.5 40.3 ug/L 11/7/2018 Uranium-238 39.8 ug/L 42.6 Mean 68.6 Maximum 15.3 Standard Deviation (o) 73.1 Mean + 2o

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