ML21274A052
| ML21274A052 | |
| Person / Time | |
|---|---|
| Site: | 07000925 |
| Issue date: | 10/01/2021 |
| From: | Lux J Environmental Properties Management |
| To: | Robert Evans, James Smith Document Control Desk, Office of Nuclear Material Safety and Safeguards |
| References | |
| Download: ML21274A052 (14) | |
Text
October 1, 2021 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 Mr. Robert Evans U.S. Nuclear Regulatory Commission 1600 East Lamar Blvd; Suite 400 Arlington, TX 76011-4511 Re: Docket No. 07000925; License No. SNM-928 Cimarron Environmental Response Trust 2021 Annual Environmental Monitoring Data
Dear Sirs:
Solely as Trustee for the Cimarron Environmental Response Trust (CERT), Environmental Properties Management LLC (EPM) submits herein the data obtained from the 2021 annual environmental monitoring sampling event. Groundwater samples were collected from 29 monitor wells and surface water samples were collected from 2 surface water locations in accordance with the Cimarron Radiation Protection Plan (RPP), Section 15, Environmental Monitoring.
All samples were analyzed for gross alpha activity, gross beta activity, isotopic uranium (both mass concentration and activity concentration), nitrate, and fluoride. Environmental samples have been analyzed for isotopic uranium activity concentration since 1988 (for more than 30 years). EPM noted that at low total uranium concentrations, the uncertainty associate with analytical results was at times greater than the reported concentration. At times, the process of converting isotopic activity to isotopic mass to calculate enrichment (expressed in terms of mass concentration) led to wide swings in the enrichment of water samples collected from the same location.
EPM and Enercon Services personnel responsible for implementation of the radiation protection program conducted a test to see if the uncertainty associated with isotopic analysis could be reduced. Groundwater samples were collected and analyzed for isotopic activity concentration 9400 Ward Parkway
- Kansas City, MO 64114 Tel: 405-642-5152
- jlux@envpm.com
by method HASL 300 (alpha spectroscopic analysis) and for isotopic mass concentration by method EPA 200.8 (inductively coupled plasma mass spectroscopy, or ICP-MS).
On May 4, 2017, EPM submitted a technical memorandum entitled Analysis of Analytical Method for Uranium Enrichment Determination (ML17128A093) to the U. S. Nuclear Regulatory Commission (NRC) and the Oklahoma Department of Environmental Quality (DEQ). This technical memorandum demonstrated that analysis of water samples for isotopic mass concentration produces results with significantly less uncertainty than analysis of water samples for isotopic activity concentration. With the exception of the annual environmental monitoring program sampling events, EPM has always had water samples analyzed only for isotopic mass concentration.
Section 15 of the RPP requires analysis for isotopic uranium but does not specify a method. The cost of analysis for isotopic activity concentration is approximately 2.5 times the cost for isotopic mass concentration. Consequently, environmental monitoring samples will in the future be analyzed only for isotopic mass concentration.
If you have any questions or desire clarification, please call me at (405) 641-5152.
Sincerely, Jeff Lux, P.E.
Project Manager cc: Michael Broderick, Oklahoma Department of Environmental Quality NRC Public Document Room 9400 Ward Parkway
- Kansas City, MO 64114 Tel: 405-642-5152
- jlux@envpm.com
Cimarron Environmental Response Trust 2021 Annual Environmental Monitoring Data Lab or Lab Total Activity/ Data Area Sample No Coll Date Parameter Uncertainty Units MDL Result Concentration Review Qual 1201 7/7/2021 Fluoride 0.30 0.015 MG/L 0.033 1201 7/7/2021 Nitrogen, Nitrate/Nitrite 0.23 MG/L J 0.085 1201 7/7/2021 ALPHA 3.08 4.73 PCI/L U 8.18 1201 7/7/2021 BETA 18.6 5.91 PCI/L 9.17 1201 7/7/2021 Uranium233/234 2.74 1.09 PCI/L 0.914 1201 7/7/2021 Uranium235/236 0.03 0.245 PCI/L U 0.567 1201 7/7/2021 Uranium238 1.61 0.876 4.32 PCI/L 0.906 1201 7/7/2021 Uranium235 0.05 0.00423 UG/L J 0.01 SURFACE 1201 7/7/2021 Uranium238 6.72 0.337 6.77 UG/L 0.067 WATER 1202 7/1/2021 Fluoride 0.22 0.0133 MG/L 0.033 1202 7/1/2021 Nitrogen, Nitrate/Nitrite ND MG/L U 0.085 1202 7/1/2021 ALPHA 0.32 2.59 PCI/L U 4.72 1202 7/1/2021 BETA 26.2 5.55 PCI/L 7.99 1202 7/1/2021 Uranium233/234 0.41 0.547 PCI/L U 0.889 1202 7/1/2021 Uranium235/236 0.07 0.323 PCI/L U 0.563 1202 7/1/2021 Uranium238 0.71 0.522 1.20 PCI/L 0.658 1202 7/1/2021 Uranium235 ND 0.00334 UG/L U 0.01 1202 7/1/2021 Uranium238 0.54 0.0352 0.54 UG/L 0.067 MWWA03 7/8/2021 Fluoride 3.71 0.135 MG/L 0.165 MWWA03 7/8/2021 Nitrogen, Nitrate/Nitrite ND MG/L U 0.017 MWWA03 7/8/2021 ALPHA 254.00 19 PCI/L 4.53 MWWA03 7/8/2021 BETA 48.1 4.06 PCI/L 3.4 1206NORTH MWWA03 7/8/2021 Uranium233/234 248.00 9.37 PCI/L 1 MWWA03 7/8/2021 Uranium235/236 15.0 2.57 PCI/L 0.544 MWWA03 7/8/2021 Uranium238 35.6 3.56 299 PCI/L 0.741 MWWA03 7/8/2021 Uranium235 5.34 0.269 UG/L 0.1 MWWA03 7/8/2021 Uranium238 106 5.29 111 UG/L 0.335 Page 1 of 12
Cimarron Environmental Response Trust 2021 Annual Environmental Monitoring Data Lab or Lab Total Activity/ Data Area Sample No Coll Date Parameter Uncertainty Units MDL Result Concentration Review Qual MWWA09 7/8/2021 Fluoride 3.85 0.129 MG/L 0.033 MWWA09 7/8/2021 Nitrogen, Nitrate/Nitrite 1.86 MG/L 0.085 MWWA09 7/8/2021 ALPHA 55.6 8.66 PCI/L 4.12 MWWA09 7/8/2021 BETA 26.6 3.17 PCI/L 3.09 1206NORTH MWWA09 7/8/2021 Uranium233/234 62.2 4.61 PCI/L 0.828 MWWA09 7/8/2021 Uranium235/236 3.61 1.25 PCI/L 0.328 MWWA09 7/8/2021 Uranium238 24.3 2.89 90.1 PCI/L 0.62 MWWA09 7/8/2021 Uranium235 1.34 0.0692 UG/L 0.05 MWWA09 7/8/2021 Uranium238 74.5 3.73 75.8 UG/L 0.067 1351 7/8/2021 Fluoride 1.03 0.036 MG/L 0.033 1351 7/8/2021 Nitrogen, Nitrate/Nitrite 34.1 MG/L 0.85 1351 7/8/2021 ALPHA 1,590 45.8 PCI/L 4.23 1351 7/8/2021 BETA 292.00 9.9 PCI/L 3.8 1351 7/8/2021 Uranium233/234 1,130 39.2 PCI/L 2.71 1351 7/8/2021 Uranium235/236 58.7 10 PCI/L 2.1 1351 7/8/2021 Uranium238 305 20.4 1,494 PCI/L 2.34 1351 7/8/2021 Uranium235 22.6 1.14 UG/L 0.4 1351 7/8/2021 Uranium238 849 42.5 872 UG/L 2.68 WUBA3 1351DUP 7/8/2021 Fluoride 1.04 0.0363 MG/L 0.033 1351DUP 7/8/2021 Nitrogen, Nitrate/Nitrite 33.4 MG/L 0.85 1351DUP 7/8/2021 ALPHA 964 39.3 PCI/L 4.63 1351DUP 7/8/2021 BETA 260 11.7 PCI/L 3.77 1351DUP 7/8/2021 Uranium233/234 1,100 28.8 PCI/L 1.96 1351DUP 7/8/2021 Uranium235/236 65.5 7.84 PCI/L 1.16 1351DUP 7/8/2021 Uranium238 283 14.6 1,449 PCI/L 1.59 1351DUP 7/8/2021 Uranium235 22.7 1.14 UG/L 0.4 1351DUP 7/8/2021 Uranium238 840 42 863 UG/L 2.68 Page 2 of 12
Cimarron Environmental Response Trust 2021 Annual Environmental Monitoring Data Lab or Lab Total Activity/ Data Area Sample No Coll Date Parameter Uncertainty Units MDL Result Concentration Review Qual 1352 7/8/2021 Fluoride 0.47 0.0191 MG/L 0.033 1352 7/8/2021 Nitrogen, Nitrate/Nitrite 39.3 MG/L 0.85 1352 7/8/2021 ALPHA 62.9 9.36 PCI/L 4.23 1352 7/8/2021 BETA 37.1 3.92 PCI/L 3.59 1352 7/8/2021 Uranium233/234 36.2 3.26 PCI/L 0.733 1352 7/8/2021 Uranium235/236 2.31 0.933 PCI/L 0.447 1352 7/8/2021 Uranium238 35.4 3.21 73.9 PCI/L 0.529 1352 7/8/2021 Uranium235 0.90 0.048 UG/L 0.05 1352 7/8/2021 Uranium238 123 6.15 124 UG/L 0.335 1354 7/8/2021 Fluoride 0.29 0.0145 MG/L 0.033 1354 7/8/2021 Nitrogen, Nitrate/Nitrite 255 MG/L 8.5 1354 7/8/2021 ALPHA 6.97 3.55 PCI/L 5.53 1354 7/8/2021 BETA 40.8 3 PCI/L 2.98 WUBA3 1354 7/8/2021 Uranium233/234 0.39 0.606 PCI/L U 0.998 1354 7/8/2021 Uranium235/236 0.03 0.269 PCI/L U 0.622 1354 7/8/2021 Uranium238 0.13 0.37 0.49 PCI/L U 0.641 1354 7/8/2021 Uranium235 0.01 0.00338 UG/L J 0.01 1354 7/8/2021 Uranium238 1.19 0.0634 1.20 UG/L 0.067 1356 7/8/2021 Fluoride 1.03 0.036 MG/L 0.033 1356 7/8/2021 Nitrogen, Nitrate/Nitrite 4.85 MG/L 0.17 1356 7/8/2021 ALPHA 768 33.2 PCI/L 3.96 1356 7/8/2021 BETA 211 8.37 PCI/L 3.56 1356 7/8/2021 Uranium233/234 555 18.4 PCI/L 1.52 1356 7/8/2021 Uranium235/236 27.10 4.55 PCI/L 0.943 1356 7/8/2021 Uranium238 218 11.6 800 PCI/L 1.33 1356 7/8/2021 Uranium235 14.20 0.713 UG/L 0.25 1356 7/8/2021 Uranium238 782 39.1 796 UG/L 1.68 Page 3 of 12
Cimarron Environmental Response Trust 2021 Annual Environmental Monitoring Data Lab or Lab Total Activity/ Data Area Sample No Coll Date Parameter Uncertainty Units MDL Result Concentration Review Qual T62 7/7/2021 Fluoride 3.65 0.122 MG/L 0.033 T62 7/7/2021 Nitrogen, Nitrate/Nitrite 6.57 MG/L 0.17 T62 7/7/2021 ALPHA 153 14.4 PCI/L 4.83 T62 7/7/2021 BETA 44.0 3.95 PCI/L 3.53 T62 7/7/2021 Uranium233/234 97.0 5.08 PCI/L 0.909 T62 7/7/2021 Uranium235/236 3.53 1.1 PCI/L 0.471 T62 7/7/2021 Uranium238 29.6 2.81 130 PCI/L 0.556 T62 7/7/2021 Uranium235 2.38 0.12 UG/L 0.05 T62 7/7/2021 Uranium238 107 5.37 109 UG/L 0.335 T64 7/7/2021 Fluoride 5.98 0.2 MG/L 0.066 T64 7/7/2021 Nitrogen, Nitrate/Nitrite 8.49 MG/L 0.17 T64 7/7/2021 ALPHA 453 24.4 PCI/L 4.05 T64 7/7/2021 BETA 72.8 4.99 PCI/L 3.83 WAA T64 7/7/2021 Uranium233/234 422 14.6 PCI/L 1.38 U>DCGL T64 7/7/2021 Uranium235/236 22.7 3.77 PCI/L 0.774 T64 7/7/2021 Uranium238 61.1 5.57 506 PCI/L 1.24 T64 7/7/2021 Uranium235 8.08 0.409 UG/L 0.2 T64 7/7/2021 Uranium238 182 9.08 190 UG/L 0.335 T70R 7/7/2021 Fluoride 0.83 0.0299 MG/L 0.033 T70R 7/7/2021 Nitrogen, Nitrate/Nitrite 1.71 MG/L 0.085 T70R 7/7/2021 ALPHA 91.8 11.7 PCI/L 4.34 T70R 7/7/2021 BETA 21.4 3.42 PCI/L 4 T70R 7/7/2021 Uranium233/234 127 6.28 PCI/L 0.853 T70R 7/7/2021 Uranium235/236 5.58 1.49 PCI/L 0.656 T70R 7/7/2021 Uranium238 21.3 2.58 154 PCI/L 0.596 T70R 7/7/2021 Uranium235 2.76 0.139 UG/L 0.05 T70R 7/7/2021 Uranium238 53.3 2.67 56.1 UG/L 0.067 Page 4 of 12
Cimarron Environmental Response Trust 2021 Annual Environmental Monitoring Data Lab or Lab Total Activity/ Data Area Sample No Coll Date Parameter Uncertainty Units MDL Result Concentration Review Qual T76 7/7/2021 Fluoride 2.73 0.0918 MG/L 0.033 T76 7/7/2021 Nitrogen, Nitrate/Nitrite 17.6 MG/L 0.425 T76 7/7/2021 ALPHA 155 15.8 PCI/L 4.2 T76 7/7/2021 BETA 59.6 4.7 PCI/L 3.38 T76 7/7/2021 Uranium233/234 158 7.13 PCI/L 0.845 T76 7/7/2021 Uranium235/236 7.08 1.7 PCI/L 0.572 T76 7/7/2021 Uranium238 54.2 4.19 219 PCI/L 0.832 T76 7/7/2021 Uranium235 2.92 0.147 UG/L 0.05 T76 7/7/2021 Uranium238 145 7.23 148 UG/L 0.335 T77 7/8/2021 Fluoride 0.63 0.0237 MG/L 0.033 T77 7/8/2021 Nitrogen, Nitrate/Nitrite 1.60 MG/L 0.085 T77 7/8/2021 ALPHA 45.0 6.9 PCI/L J 6.38 T77 7/8/2021 BETA 13.4 3.13 PCI/L 4.53 WAA T77 7/8/2021 Uranium233/234 88.4 7.49 PCI/L 1.84 U>DCGL T77 7/8/2021 Uranium235/236 3.63 1.78 PCI/L 1.33 T77 7/8/2021 Uranium238 15.9 3.22 108 PCI/L 1.37 T77 7/8/2021 Uranium235 1.43 0.0735 UG/L 0.05 T77 7/8/2021 Uranium238 43.4 2.17 44.8 UG/L 0.067 T79 7/8/2021 Fluoride 0.76 0.0277 MG/L 0.033 T79 7/8/2021 Nitrogen, Nitrate/Nitrite 0.30 MG/L 0.085 T79 7/8/2021 ALPHA 79.1 5.92 PCI/L 2.25 T79 7/8/2021 BETA 16.0 2.18 PCI/L 2.93 T79 7/8/2021 Uranium233/234 96.4 6.04 PCI/L 0.774 T79 7/8/2021 Uranium235/236 4.19 1.43 PCI/L 0.673 T79 7/8/2021 Uranium238 16.5 2.52 117 PCI/L 0.762 T79 7/8/2021 Uranium235 1.93 0.0981 UG/L 0.05 T79 7/8/2021 Uranium238 49.9 2.5 51.8 UG/L 0.067 Page 5 of 12
Cimarron Environmental Response Trust 2021 Annual Environmental Monitoring Data Lab or Lab Total Activity/ Data Area Sample No Coll Date Parameter Uncertainty Units MDL Result Concentration Review Qual T82 7/8/2021 Fluoride 0.40 0.0174 MG/L 0.033 T82 7/8/2021 Nitrogen, Nitrate/Nitrite ND MG/L U 0.017 T82 7/8/2021 ALPHA 13.9 4.12 PCI/L 5.33 T82 7/8/2021 BETA 7.28 1.91 PCI/L 2.75 WAAWEST T82 7/8/2021 Uranium233/234 21.9 3.13 PCI/L 0.926 T82 7/8/2021 Uranium235/236 0.78 0.743 PCI/L U 0.784 T82 7/8/2021 Uranium238 6.05 1.67 28.7 PCI/L 0.803 T82 7/8/2021 Uranium235 0.30 0.0154 UG/L 0.01 T82 7/8/2021 Uranium238 19.5 0.975 19.8 UG/L 0.067 1314 7/6/2021 Fluoride 0.32 0.0154 MG/L 0.033 1314 7/6/2021 Nitrogen, Nitrate/Nitrite 1.39 MG/L 0.085 1314 7/6/2021 ALPHA 2.73 2.62 PCI/L U 3.84 1314 7/6/2021 BETA 1.06 2.14 PCI/L U 3.75 1314 7/6/2021 Uranium233/234 1.19 0.68 PCI/L 0.64 1314 7/6/2021 Uranium235/236 0.00 0.208 PCI/L U 0.309 1314 7/6/2021 Uranium238 0.34 0.41 1.53 PCI/L U 0.55 1314 7/6/2021 Uranium235 ND 0.00335 UG/L U 0.01 BA1A 1314 7/6/2021 Uranium238 1.04 0.0567 1.04 UG/L 0.067 SANDSTONE TMW08 7/7/2021 Fluoride 0.44 0.0183 MG/L 0.033 B
TMW08 7/7/2021 Nitrogen, Nitrate/Nitrite 1.92 MG/L 0.085 TMW08 7/7/2021 ALPHA 320 9.99 PCI/L 2.52 TMW08 7/7/2021 BETA 159 5.19 PCI/L 2.8 TMW08 7/7/2021 Uranium233/234 206 10.1 PCI/L 1.33 TMW08 7/7/2021 Uranium235/236 11.0 2.66 PCI/L 1.23 TMW08 7/7/2021 Uranium238 166 9.08 383 PCI/L 1.15 TMW08 7/7/2021 Uranium235 3.98 0.202 UG/L 0.1 TMW08 7/7/2021 Uranium238 405 20.2 409 UG/L 0.67 Page 6 of 12
Cimarron Environmental Response Trust 2021 Annual Environmental Monitoring Data Lab or Lab Total Activity/ Data Area Sample No Coll Date Parameter Uncertainty Units MDL Result Concentration Review Qual 02W42 7/7/2021 Fluoride 0.49 0.0198 MG/L 0.033 02W42 7/7/2021 Nitrogen, Nitrate/Nitrite 0.36 MG/L 0.085 02W42 7/7/2021 ALPHA 924 41.4 PCI/L J 4.81 02W42 7/7/2021 BETA 378 14 PCI/L 4.3 02W42 7/7/2021 Uranium233/234 1,030 34.8 PCI/L 3.47 02W42 7/7/2021 Uranium235/236 68.3 10 PCI/L 2.49 02W42 7/7/2021 Uranium238 522 24.8 1,620 PCI/L 3.17 02W42 7/7/2021 Uranium235 23.6 1.19 UG/L 0.4 BA1A 02W42 7/7/2021 Uranium238 1,530 76.5 1,554 UG/L 2.68 SANDSTONE 02W27 7/7/2021 Fluoride 0.56 0.0216 MG/L 0.033 B
02W27 7/7/2021 Nitrogen, Nitrate/Nitrite 3.59 MG/L 0.085 02W27 7/7/2021 ALPHA 61.8 10.3 PCI/L 4.36 02W27 7/7/2021 BETA 21.9 4.4 PCI/L 4.22 02W27 7/7/2021 Uranium233/234 64.1 4.89 PCI/L 0.968 02W27 7/7/2021 Uranium235/236 3.58 1.33 PCI/L 0.786 02W27 7/7/2021 Uranium238 28.8 3.28 96.5 PCI/L 0.636 02W27 7/7/2021 Uranium235 1.14 0.0596 UG/L 0.05 02W27 7/7/2021 Uranium238 80.2 4.01 81.3 UG/L 0.067 02W09 7/6/2021 Fluoride 1.22 0.0421 MG/L 0.033 02W09 7/6/2021 Nitrogen, Nitrate/Nitrite ND MG/L U 0.017 02W09 7/6/2021 ALPHA 3.91 3.48 PCI/L U 4.99 BA1A 02W09 7/6/2021 BETA 7.88 3.25 PCI/L 4.5 TRANSITION 02W09 7/6/2021 Uranium233/234 3.55 1.24 PCI/L 0.921 ZONE 02W09 7/6/2021 Uranium235/236 0.09 0.349 PCI/L U 0.587 02W09 7/6/2021 Uranium238 2.49 1.06 6.13 PCI/L 0.912 02W09 7/6/2021 Uranium235 0.09 0.00542 UG/L 0.01 02W09 7/6/2021 Uranium238 7.71 0.386 7.80 UG/L 0.067 Page 7 of 12
Cimarron Environmental Response Trust 2021 Annual Environmental Monitoring Data Lab or Lab Total Activity/ Data Area Sample No Coll Date Parameter Uncertainty Units MDL Result Concentration Review Qual 02W28 7/6/2021 Fluoride 0.72 0.0265 MG/L 0.033 02W28 7/6/2021 Nitrogen, Nitrate/Nitrite 0.88 MG/L 0.085 02W28 7/6/2021 ALPHA 239 21.3 PCI/L 4.63 02W28 7/6/2021 BETA 77.1 6.85 PCI/L 3.05 02W28 7/6/2021 Uranium233/234 149 7.13 PCI/L 0.852 02W28 7/6/2021 Uranium235/236 8.54 1.91 PCI/L 0.328 02W28 7/6/2021 Uranium238 86.2 5.42 244 PCI/L 0.655 02W28 7/6/2021 Uranium235 3.36 0.169 UG/L 0.05 02W28 7/6/2021 Uranium238 263 13.1 266 UG/L 0.335 TMW09 7/7/2021 Fluoride 0.65 0.0242 MG/L 0.033 TMW09 7/7/2021 Nitrogen, Nitrate/Nitrite 2.32 MG/L 0.085 TMW09 7/7/2021 ALPHA 1,690 24.3 PCI/L 2.05 BA1A TMW09 7/7/2021 BETA 569 9.5 PCI/L 2.75 TRANSITION TMW09 7/7/2021 Uranium233/234 967 35.7 PCI/L 2.2 ZONE TMW09 7/7/2021 Uranium235/236 61.1 10 PCI/L 2.59 TMW09 7/7/2021 Uranium238 639 29 1,667 PCI/L 2.53 TMW09 7/7/2021 Uranium235 22.6 1.14 UG/L 0.4 TMW09 7/7/2021 Uranium238 1,910 95.6 1,933 UG/L 2.68 TMW09DUP 7/7/2021 Fluoride 0.65 0.0242 MG/L 0.033 TMW09DUP 7/7/2021 Nitrogen, Nitrate/Nitrite 2.37 MG/L 0.085 TMW09DUP 7/7/2021 ALPHA 1,630 24 PCI/L 2.66 TMW09DUP 7/7/2021 BETA 612 9.75 PCI/L 3.07 TMW09DUP 7/7/2021 Uranium233/234 1,000 39.1 PCI/L 3.28 TMW09DUP 7/7/2021 Uranium235/236 50.5 9.8 PCI/L 1.47 TMW09DUP 7/7/2021 Uranium238 676 32.1 1,727 PCI/L 2.94 TMW09DUP 7/7/2021 Uranium235 22.9 1.15 UG/L 0.4 TMW09DUP 7/7/2021 Uranium238 1,940 97.2 1,963 UG/L 2.68 Page 8 of 12
Cimarron Environmental Response Trust 2021 Annual Environmental Monitoring Data Lab or Lab Total Activity/ Data Area Sample No Coll Date Parameter Uncertainty Units MDL Result Concentration Review Qual TMW13 7/6/2021 Fluoride 0.58 0.0221 MG/L 0.033 TMW13 7/6/2021 Nitrogen, Nitrate/Nitrite ND MG/L U 0.017 TMW13 7/6/2021 ALPHA 723 31.4 PCI/L J 4.59 TMW13 7/6/2021 BETA 364 12.1 PCI/L 3.99 TMW13 7/6/2021 Uranium233/234 721 24.3 PCI/L 1.5 TMW13 7/6/2021 Uranium235/236 50.3 7.18 PCI/L 1.46 TMW13 7/6/2021 Uranium238 420 18.6 1191 PCI/L 1.18 TMW13 7/6/2021 Uranium235 14.6 0.733 UG/L 0.25 TMW13 7/6/2021 Uranium238 1130 56.5 1145 UG/L 1.34 02W32 7/6/2021 Fluoride 0.58 0.0222 MG/L 0.033 02W32 7/6/2021 Nitrogen, Nitrate/Nitrite ND MG/L U 0.017 02W32 7/6/2021 ALPHA 114 13.5 PCI/L 4.79 02W32 7/6/2021 BETA 59.4 5.68 PCI/L 3.71 BA1B 02W32 7/6/2021 Uranium233/234 82.0 5.15 PCI/L 0.746 SOUTH 02W32 7/6/2021 Uranium235/236 5.01 1.44 PCI/L 0.634 02W32 7/6/2021 Uranium238 52.8 4.13 140 PCI/L 0.465 02W32 7/6/2021 Uranium235 1.96 0.0993 UG/L 0.05 02W32 7/6/2021 Uranium238 160 8.01 162 UG/L 0.335 02W32DUP 7/6/2021 Fluoride 0.65 0.0243 MG/L 0.033 02W32DUP 7/6/2021 Nitrogen, Nitrate/Nitrite ND MG/L U 0.017 02W32DUP 7/6/2021 ALPHA 127 16.1 PCI/L 4.97 02W32DUP 7/6/2021 BETA 51.7 6.3 PCI/L 4.59 02W32DUP 7/6/2021 Uranium233/234 73.9 5.67 PCI/L 0.833 02W32DUP 7/6/2021 Uranium235/236 3.90 1.47 PCI/L 0.418 02W32DUP 7/6/2021 Uranium238 46.4 4.49 124 PCI/L 0.624 02W32DUP 7/6/2021 Uranium235 1.95 0.0988 UG/L 0.05 02W32DUP 7/6/2021 Uranium238 160 8.01 162 UG/L 0.335 Page 9 of 12
Cimarron Environmental Response Trust 2021 Annual Environmental Monitoring Data Lab or Lab Total Activity/ Data Area Sample No Coll Date Parameter Uncertainty Units MDL Result Concentration Review Qual 02W16 7/7/2021 Fluoride 0.41 0.0176 MG/L 0.033 02W16 7/7/2021 Nitrogen, Nitrate/Nitrite ND MG/L U 0.017 02W16 7/7/2021 ALPHA 10.2 4.71 PCI/L 4.85 02W16 7/7/2021 BETA 5.52 2.78 PCI/L 4.14 BA1B 02W16 7/7/2021 Uranium233/234 10.1 2.11 PCI/L 1.04 SOUTH 02W16 7/7/2021 Uranium235/236 1.94 1.07 PCI/L 0.828 02W16 7/7/2021 Uranium238 7.03 1.77 19.1 PCI/L 0.886 02W16 7/7/2021 Uranium235 0.25 0.0131 UG/L 0.01 02W16 7/7/2021 Uranium238 20.3 1.02 20.6 UG/L 0.067 02W08 7/6/2021 Fluoride 0.60 0.0229 MG/L 0.033 02W08 7/6/2021 Nitrogen, Nitrate/Nitrite ND MG/L U 0.017 02W08 7/6/2021 ALPHA 71.6 12.5 PCI/L 4.83 02W08 7/6/2021 BETA 22.8 4.37 PCI/L 3.82 02W08 7/6/2021 Uranium233/234 52.5 4.1 PCI/L 0.633 02W08 7/6/2021 Uranium235/236 3.51 1.21 PCI/L 0.626 02W08 7/6/2021 Uranium238 33.0 3.25 89.0 PCI/L 0.581 02W08 7/6/2021 Uranium235 1.20 0.0624 UG/L 0.05 BA1B 02W08 7/6/2021 Uranium238 101 5.07 102 UG/L 0.335 NORTH 02W06 7/6/2021 Fluoride 0.53 0.0209 MG/L 0.033 02W06 7/6/2021 Nitrogen, Nitrate/Nitrite ND MG/L U 0.017 02W06 7/6/2021 ALPHA 318 11.2 PCI/L 3.43 02W06 7/6/2021 BETA 105 4.41 PCI/L 3.01 02W06 7/6/2021 Uranium233/234 181 7.57 PCI/L 0.794 02W06 7/6/2021 Uranium235/236 12.9 2.25 PCI/L 0.305 02W06 7/6/2021 Uranium238 111 5.91 305 PCI/L 0.455 02W06 7/6/2021 Uranium235 4.75 0.24 UG/L 0.1 02W06 7/6/2021 Uranium238 361 18 366 UG/L 0.67 Page 10 of 12
Cimarron Environmental Response Trust 2021 Annual Environmental Monitoring Data Lab or Lab Total Activity/ Data Area Sample No Coll Date Parameter Uncertainty Units MDL Result Concentration Review Qual 02W17 7/6/2021 Fluoride 0.35 0.016 MG/L 0.033 02W17 7/6/2021 Nitrogen, Nitrate/Nitrite ND MG/L U 0.017 02W17 7/6/2021 ALPHA 29.6 3.46 PCI/L 2.28 02W17 7/6/2021 BETA 13.4 1.58 PCI/L 1.91 02W17 7/6/2021 Uranium233/234 31.2 3.16 PCI/L 0.753 02W17 7/6/2021 Uranium235/236 1.28 0.781 PCI/L 0.751 02W17 7/6/2021 Uranium238 17.5 2.36 50.0 PCI/L 0.455 02W17 7/6/2021 Uranium235 0.67 0.0335 UG/L 0.01 02W17 7/6/2021 Uranium238 51.8 2.59 52.5 UG/L 0.067 02W35 7/6/2021 Fluoride 0.34 0.0159 MG/L 0.033 02W35 7/6/2021 Nitrogen, Nitrate/Nitrite ND MG/L U 0.085 02W35 7/6/2021 ALPHA 62.2 5.07 PCI/L 2.34 02W35 7/6/2021 BETA 31.2 2.34 PCI/L 2.29 BA1B 02W35 7/6/2021 Uranium233/234 57.5 5.11 PCI/L 1.08 NORTH 02W35 7/6/2021 Uranium235/236 3.15 1.36 PCI/L 0.695 02W35 7/6/2021 Uranium238 33.7 3.91 94.4 PCI/L 0.716 02W35 7/6/2021 Uranium235 1.59 0.0812 UG/L 0.05 02W35 7/6/2021 Uranium238 119 5.96 121 UG/L 0.335 02W44 7/6/2021 Fluoride 0.53 0.0207 MG/L 0.033 02W44 7/6/2021 Nitrogen, Nitrate/Nitrite ND MG/L U 0.017 02W44 7/6/2021 ALPHA 28.9 2.95 PCI/L 1.82 02W44 7/6/2021 BETA 25.1 2.11 PCI/L 2.25 02W44 7/6/2021 Uranium233/234 30.0 3.75 PCI/L 0.929 02W44 7/6/2021 Uranium235/236 2.17 1.18 PCI/L 0.826 02W44 7/6/2021 Uranium238 21.2 3.15 53.4 PCI/L 0.668 02W44 7/6/2021 Uranium235 0.60 0.0302 UG/L 0.01 02W44 7/6/2021 Uranium238 49.4 2.47 50.0 UG/L 0.067 Page 11 of 12
Cimarron Environmental Response Trust 2021 Annual Environmental Monitoring Data Lab or Lab Total Activity/ Data Area Sample No Coll Date Parameter Uncertainty Units MDL Result Concentration Review Qual 02W43 7/6/2021 Fluoride 0.50 0.0198 MG/L 0.033 02W43 7/6/2021 Nitrogen, Nitrate/Nitrite ND MG/L U 0.085 02W43 7/6/2021 ALPHA 68.4 11 PCI/L 4.64 02W43 7/6/2021 BETA 32.0 4.29 PCI/L 3.4 BA1B 02W43 7/6/2021 Uranium233/234 48.5 3.31 PCI/L 0.473 NORTH 02W43 7/6/2021 Uranium235/236 3.13 0.955 PCI/L 0.442 02W43 7/6/2021 Uranium238 32.5 2.71 84.1 PCI/L 0.386 02W43 7/6/2021 Uranium235 1.18 0.0611 UG/L 0.05 02W43 7/6/2021 Uranium238 95.4 4.77 96.6 UG/L 0.067 Page 12 of 12