ML21076A466

Cimarron Environmental Response Trust Facility Decommissioning Plan, Revision 2, Tables, Historical Earthquakes in Oklahoma Greater than 3.0 Magnitude (as of February 9, 2021), Part 2

ML21076A466
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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
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Preparer: D. Horne; Date: 02/15/21 Table 2 Revision 2 Reviewer: E. Dulle; Date: 02/15/21 Historical Earthquakes in Oklahoma Greater than 3.0 Magnitude (As of February 9, 2021)

Date and Time Latitude Longitude Epicenter Depth (km) Magnitude MaQ. Tvpe 1 2015-03-08T17:02:01 .300Z 36.6146 -97.6436 22km SSE of Medford, Oklahoma 5.559 3 ml 2015-03-08T16:48:08.400Z 35.6348 -97.274 7km N of Jones, Oklahoma 5.823 3.3 mwr 2015-03-08T13:51 :33.800Z 36.6304 -97 .6542 20km SSE of Medford, Oklahoma 5.401 3 ml 2015-03-07T22:46:50.500Z 36.6269 -97.6678 20km SSE of Medford, Oklahoma 5.417 3.1 mwr 2015-03-07T21 :11 :47.200Z 36.5974 -97.6328 24km SSE of Medford, Oklahoma 5.878 3.7 mwr 2015-03-07T20:44:05.300Z 36.5987 -97.6196 25km SSE of Medford, Oklahoma 5.692 3 ml 2015-03-06T08:59: 15.800Z 36.6241 -97.673 21 km SSE of Medford, Oklahoma 6.374 3.1 ml 2015-03-05T21 :01 :04.700Z 36.195 -97.2892 10km S of Perry, Oklahoma 5.04 3 ml 2015-03-05T20:59:41.350Z 36.7917 -98.2629 9km ENE of Cherokee, Oklahoma . 9.39 3.3 mb lg 2015-03-05T20:33:09.000Z 36.8123 -98.2732 9km NE of Cherokee, Oklahoma 5.449 3.2 ml 2015-03-05T09:51 :06.200Z 36.8115 -98.2774 9km NE of Cherokee, Oklahoma 5.182 3.1 ml 2015-03-03T20:05:24.700Z 36.1634 -96.9948 7km NE of Stillwater, Oklahoma 4.464 3 ml 2015-03-03T15:56:01.250Z 37.1983 -97.9048 12km ENE of Anthony, Kansas 9.91 3.8 mb lg 2015-03-03T12:06: 13.1 00Z 36.0569 -97 .5158 13km NNE of Crescent, Oklahoma 5 3.4 ml 2015-03-02T20:06:30.900Z 36.2209 -97.6541 22km ESE of Waukomis, Oklahoma 3.917 3.2 ml 2015-03-02T19:07:53.1 00Z 36.2235 -97.6451 23km ESE of Waukomis, Oklahoma 3.222 3 ml 2015-03-01 T08:58:54.400Z 35.9501 -96.7749 3km S of Cushing, Oklahoma 4.673 3 ml 2015-03-01T02:47:20.81 OZ 37.091 -97.847 17km ESE of Anthony, Kansas 7.27 3.5 mb lg 201 s-03-01 roo:o5: 12.20oz 35.9531 -96.7739 3km S of Cushing, Oklahoma 3.88 3.2 ml 2015-02-28T20:01 :04.000Z 36.1272 -97.2771 18km S of Perry, Oklahoma 4.646 3.1 ml 2015-02-27T20:23: 10.300Z 36.2661 -97.3809 8km WSW of Perry, Oklahoma 6.809 3.3 ml 2015-02-26T07:32:52 .300Z 36.3933 -97 .287 11 km N of Perry, Oklahoma 6.755 3 ml 2015-02-25T17:58:06.600Z 36.2462 -97 .6035 26km E of Waukomis, Oklahoma 3.963 3.1 mb lg 2015-02-25T17:30:38.200Z 36.9467 -97.6276 9km S of Caldwell, Kansas 7.001 3 ml 2015-02-25T02:08:22.400Z 36.8681 -98 .2988 13km NNE of Cherokee, Oklahoma 5 3.3 ml 2015-02-24T18:30:10.20oz 36.6005 -97 .622 24km SSE of Medford, Oklahoma 7.067 3.4 ml 2015-02-23T17:05:22.800Z 36 .9431 -97.6272 10km S of Caldwell, Kansas 5 3 ml 2015-02-21T12:42:40.200Z 35.4813 -96.9471 4km WSW of Meeker, Oklahoma 6.161 3 ml 2015-02-21 T06:45 :43. 700Z 36.6002 -97 .6284 24km SSE of Medford, Oklahoma 3.267 3 ml 2015-02-21T04:47:08.300Z 36 .3981 -97 .2972 12km N of Perry, Oklahoma 6.096 3.1 ml 2015-02-20T09:57:59.200Z 36 .5337 -98.2088 5km ESE of Helena, Oklahoma 5 3.1 ml 2015-02-20T03:24: 13.600Z 35.8179 -97.4206 6km S of Guthrie, Oklahoma 6.23 3.2 ml 2015-02-19T04:06: 15.040Z 35.8874 -97.2677 6km S of Langston, Oklahoma 2.23 3.-1 ml 2015-02-18T21 :44:46.000Z 36.537 -97 .0485 15km S of McCord, Oklahoma 5.48 3 mb lg 2015-02-18T21 :36:47.400Z 36.5993 -97 .6289 24km SSE of Medford, Oklahoma 5 3.1 ml 2015-02-18T19:29:13.700Z 36.5578 -98.1574 10km E of Helena, Oklahoma 5.872 3.2 ml 2015-02-18T19:10:17.500Z 36.5571 -98.1557 10km E of Helena, Oklahoma 5.535 3.4 ml 2015-02-17T17: 13: 19.1 00Z 36.5323 -98.2136 5km ESE of Helena, Oklahoma 4.514 3.6 ml 2015-02-17T15:21 :48.300Z 36.0172 -97.0367 4km N of Perkins , Oklahoma 4.2 3 ml 2015-02-16T12:54: 13.000Z 36.8131 -98.2783 9km NE of Cherokee, Oklahoma 3.512 3.5 ml 2015-02-16T09:50:26.200Z 35.8175 -97.449 7km SSW of Guthrie, Oklahoma 5.274 3.5 mwr 2015-02-15T18:27:08.430Z 37.1866 -97 .8997 12km ENE of Anthony, Kansas 5 3.6 mwr 2015-02-15T13:15:38.700Z 36.5986 -97 .6191 25km SSE of Medford, Oklahoma 5.723 3 ml 2015-02-15T06:42:49.500Z 36.5966 -97.6376 24km SSE of Medford, Oklahoma 5.214 3.3 ml 2015-02-15T04:22:05.1 00Z 36.5984 -97.6223 25km SSE of Medford, Oklahoma 5.317 3.3 ml 2015-02-14T19:52:08.000Z 36.5975 -97 .6293 25km SSE of Medford, Oklahoma 5.419 3.1 ml 2015-02-14T18:09:22.590Z 37.0208 -97 .9057 18km SE of Anthony, Kansas 6 3 mb lg 2015-02-14T17:23:04.900Z 36.5979 -97.6329 24km SSE of Medford, Oklahoma 3.53 3.6 ml 2015-02-14T17:13:21.900Z 36.5972 -97.6316 25km SSE of Medford, Oklahoma 5 3.2 ml 2015-02-14T16:39:04.600Z 36.5983 -97 .6289 24km SSE of Medford, Oklahoma 5 3.8 ml 2015-02-13T17:42:40.900Z 36.9518 -97.6244 9km S of Caldwell, Kansas 6.991 3.4 mwr 2015-02-12T17:45:09.700Z 36.8911 -97.8886 16km NW of Medford, Oklahoma 3.437 3.5 ml 2015-02-12T04:51 :50.700Z 36.1864 -97 .0284 8km NNE of Stillwater, Oklahoma 4.77 3.2 ml 2015-02-11T23:56:32.300Z 36 .7003 -97.8236 14km SW of Medford, Oklahoma 5.788 3.1 ml 2015-02-11T22:31 :23.400Z 36 .8113 -98.2776 9km NE of Cherokee, Oklahoma 5.839 3.3 ml 2015-02-11T17:23:58.700Z 36.6992 -97.8262 14km SW of Medford, Oklahoma 5.36 3.1 ml 2015-02-1 OT20:23:36.500Z 36.8383 -97.8133 7km WNW of Medford, Oklahoma 5.965 3 ml 2015-02-1 OT07:32:36.000Z 37.1923 -98.0212 4km NNE of Anthony, Kansas 5 3.6 mb lg Facility Decommissioning Plan - Rev 2 February 2021 Page 36 of 56

Preparer: D. Horne; Date: 02/15/21 Table 2 Revision 2 Reviewer: E. Dulle; Date: 02/15/21 Historical Earthquakes in Oklahoma Greater than 3.0 Magnitude (As of February 9, 2021)

Date and Time Latitude Longitude Epicenter Depth (km) Magnitude Maa. Tvoe 1 2015-02-09T20:30:23.500Z 36.6081 -98.3483 9km NW of Helena, Oklahoma 5 3 ml 2015-02-08T10: 15: 13.400Z 35 .8587 -97.3455 7km ESE of Guthrie, Oklahoma 6.041 3.1 ml 2015-02-08T04:41 :38. 700Z 36.256 -97.264 4km SSE of Perry, Oklahoma 6.1 3.3 ml 2015-02-08T04: 03: 37. 600Z 36 .943 -97.622 9km S of Caldwell, Kansas 4 3.2 ml 2015-02-07T18:40:49.500Z 36.2611 -97.2763 3km SSE of Perry, Oklahoma 5.405 3.9 mwr 2015-02-06T17:20:20.300Z 36.1264 -97.2791 18km S of Perry, Oklahoma 5 3.3 ml 2015-02-06T17:11 :55.600Z 36.7309 -98.3345 3km SE of Cherokee, Oklahoma 4.066 3.1 ml 2015-02-06T16:49:05.800Z 36.7311 -98 .3342 3km SE of Cherokee, Oklahoma 4.383 3.4 ml 2015-02-06T15:31 :08.500Z 35.5456 -96.7584 9km NW of Prague, Oklahoma 4.959 3.1 ml 2015-02-05T22:48:24.1 00Z 36.9461 -97.6193 9km S of Caldwell, Kansas 2.135 3.4 ml 2015-02-05T22:24: 15.500Z 36 .8119 -98 .2803 9km NE of Cherokee, Oklahoma 6.974 3.3 ml 2015-02-05T15:08:40.800Z 36 .8147 -98.2915 8km NE of Cherokee, Oklahoma 4.381 4.2 mwr 2015-02-05T07:06:46.900Z 36 .5333 -98.2166 4km ESE of Helena, Oklahoma 4.89 3.4 mwr 2015-02-05T05:09:21.900Z 36.8162 -98.2863 9km NE of Cherokee, Oklahoma 5.537 3.3 ml 2015-02-05T01 :36:01 .200Z 36.8909 -97.8942 17km WNW of Medford , Oklahoma 5 3.2 mb lg 2015-02-04T18:20:48.040Z 36.814 -98.289 8km NE of Cherokee, Oklahoma 4.6 3.2 ml 2015-02-04T15:20:55.10OZ 36 .311 -98.1639 24km W of Waukomis, Oklahoma 7.446 3.1 ml 2015-02-04T13:20:31.880Z 37.1893 -97.9011 12km ENE of Anthony, Kansas 5 3.4 mwr 2015-02-04T09: 12:35.900Z 36.8093 -98.3525 6km N of Cherokee, Oklahoma 4.764 3 ml 2015-02-03T22: 19: 14.370Z 37.0922 -97.6568 7km NNW of Caldwell , Kansas 5 3.4 mb lg 2015-02-03T12:37:27.81 OZ 36.8402 -98.3987 10km NNW of Cherokee, Oklahoma 5 3.8 mb lg 2015-02-03T12:37:17.400Z 36.81 -98 .2847 8km NE of Cherokee, Oklahoma 6.324 3.5 ml 2015-02-02T22:09:36.850Z 36.264 -97 .285 2km S of Perry, Oklahoma 6.9 3.5 ml 2015-02-02T13:34:21.?00Z 36.6491 -97 .6634 18km SSE of Medford, Oklahoma 4.88 3.1 ml 2015-02-01T18:06:04.000Z 36.9454 -97.6297 9km SSW of Caldwell, Kansas 4.842 3.7 mwr 2015-01-30T14:24:22.1 0OZ 36 .8078 -98 .3641 5km N of Cherokee, Oklahoma 3.798 3.6 mwr 2015-01-30T00:07:31.600Z 35.5882 -97 .3994 7km NNW of Spencer, Oklahoma 6.97 3.2 ml 2015-01-29T21 :55:09.300Z 36 .3091 -98.1676 24km W of Waukomis, Oklahoma 6.79 3 ml 2015-01-29T20:44:42 .200Z 36 .9447 -97.6307 9km SSW of Caldwell, Kansas 6.031 3.3 ml 2015-01-29T20:21 :38. 71 OZ 37 .1852 -97.8565 15km ENE of Anthony, Kansas 5 3.4 mwr 2015-01-29T19:38:30.800Z 35 .5391 -96.7613 9km NW of Prague, Oklahoma 5 3.3 ml 2015-01-29T05:58: 18.090Z 37.1005 -97.6359 7km NNW of Caldwell, Kansas 6.49 3.1 mb lg 2015-01-29T03:33:26.900Z 37.0832 -97.633 6km NNW of Caldwell, Kansas 5 3.1 mb lg 2015-01-28T17:42:02 .620Z 37.2079 -97.8753 15km ENE of Anthony, Kansas 5 3 mb lg 2015-01-28T15:48:35 .10OZ 36.6159 -97.705 21 km S of Medford, Oklahoma 4.912 3 ml 2015-01-28T13:22:37 .800Z 36.8092 -98.3628 6km N of Cherokee, Oklahoma 3.778 3 ml 2015-01-28T09:33:50.000Z 35.5399 -97 .2314 5km NE of Choctaw, Oklahoma 6.809 3.2 ml 2015-01-28T05:39:46.200Z 36.1271 -97.2758 18km S of Perry, Oklahoma 5.131 3.2 mb lg 2015-01-27T17:47:01.600Z 36.2556 -97.2621 4km SSE of Perry, Oklahoma 4.905 3 ml 2015-01-27T16:55: 17.?00Z 36.631 -97.7064 19km S of Medford, Oklahoma 5.438 3.2 ml 2015-01-27T16: 10:55.700Z 36.9543 -97.6184 8km S of Caldwell, Kansas 7.886 3.1 ml 2015-01-27T15:58:40.1 OOZ 36.6288 -97 .7124 19km S of Medford, Oklahoma 5 4 mwr 2015-01-27T11 :36:36.600Z 36.2589 -97.2787 3km SSE of Perry, Oklahoma 5 3.5 mb lg 2015-01-27T11 :31 :09.800Z 36 .2618 -97.2643 3km SE of Perry, Oklahoma 3.408 4.2 mwr 2015-01-27T07:38:05.1 00Z 37.0817 -97.6618 7km NW of Caldwell, Kansas 4.21 3.4 mb lg 2015-01-27T05:28:53.580Z 37 .0805 -97.6717 7km NW of Caldwell, Kansas 5.68 3.1 mb lg 2015-01-26T23:46:23.200Z 36.5572 -98.6461 27km S of Alva, Oklahoma 13.733 3.1 mb lg 2015-01-26T21 :45:13.900Z 35.8082 -97.4173 7km S of Guthrie, Oklahoma 6.034 3.2 mb lg 2015-01-26T19:30:44.?00Z 36 .8479 -97 .7016 5km NNE of Medford, Oklahoma 6.863 4.2 ml 2015-01-26TO0: 18:29.500Z 36 .2309 -97 .5771 26km WSW of Perry, Oklahoma 6.084 3.2 mb lg 2015-01-25T09:36:32.200Z 36 .9524 -97.6149 8km S of Caldwell, Kansas 5.737 3.7 mwr 2015-01-25T07:29:34.200Z 36 .1268 -97 .2785 18km S of Perry, Oklahoma 4.762 3.2 mb lg 2015-01-24T20:38:45.400Z 36.8215 -97.7019 3km ENE of Medford, Oklahoma 5 3.4 ml 2015-01-24T15:36:46.500Z 36.8067 -98.3602 5km N of Cherokee, Oklahoma 4.565 3.4 mwr 2015-01-24T02:23:24.400Z 36.367 -98.057 16km W of Enid, Oklahoma 7 3.6 mb lg 2015-01-23T21 :49:00.000Z 36.6544 -97.6395 18km SSE of Medford, Oklahoma 5.084 3.2 ml 2015-01-23T04:00:41.4 ?OZ 37 .0946 -97.6561 8km NNW of Caldwell, Kansas 5.07 3.7 mb lg 2015-01-22T05:36:27 .600Z 36 .1299 -97.2733 17km S of Perry, Oklahoma 5.09 3.1 mb lg Facility Decommissioning Plan - Rev 2 February 2021 Page 37 of 56

Preparer: D. Horne; Date: 02/15/21 Table 2 Revision 2 Reviewer: E. Dulle; Date: 02/15/21 Historical Earthquakes in Oklahoma Greater than 3.0 Magnitude (As of February 9, 2021) 1 Date and Time Latitude Longitude Epicenter Depth (km) Magnitude Ma~. Tvoe 2015-01-22T03:23:22.3002 36.9312 -97.6441 11 km SSW of Caldwell, Kansas 2.275 3.1 ml 2015-01-20T15:27:03.3002 36.9395 -97.6179 10km S of Caldwell, Kansas 1.649 3.5 mwr 2015-01-20T00:25:47.4002 36.8046 -98.1662 17km ENE of Cherokee, Oklahoma 6.086 3.1 mb lg 2015-01-19T21 :17:09.9002 36.2881 -96.8017 5km S of Pawnee, Oklahoma 3.966 3 ml 2015-01-19T14:48: 13.4002 36.2908 -96.811 5km S of Pawnee, Oklahoma 3.947 3.4 mb lg 2015-01-19T10:19:20.2002 36.8025 -98.1959 15km ENE of Cherokee, Oklahoma 4.268 3.8 mwr 2015-01-19T09:54:31.6602 37.2146 -97 .8723 15km ENE of Anthony, Kansas 5 3.5 mwr 2015-01-19T01 :01 :03.3002 36.8175 -97.709 2km ENE of Medford, Oklahoma 4.946 3.8 ml 2015-01-18T23:54:38.8002 36.9745 -97.8559 21 km NNW of Medford, Oklahoma 5 3.1 ml 2015-01-18T16:23:04.6002 36.7234 -97.8273 12km SW of Medford, Oklahoma 4.952 3 mb lg 2015-01-18T10:17:26.7002 36.7989 -98.2708 9km ENE of Cherokee, Oklahoma 6.003 3.1 mb lg 2015-01-17T22:42 :13.2002 35.8936 -97.2665 5km S of Langston, Oklahoma 6.898 3.2 ml 2015-01-17T17:47:26.1002 36.2888 -96.8061 5km S of Pawnee, Oklahoma 5 3.1 mb lg 2015-01-17T06:33:41.4002 36.603 -98.2171 7km NE of Helena, Oklahoma 5 3.4 mb lg 2015-01-17T01 :04:17.1002 36.93 -98.0313 24km S of Anthony, Kansas 5 3.2 ml 2015-01-16T22:29:34.0002 36.6032 -97.6125 25km SSE of Medford, Oklahoma 5.645 3.4 ml 2015-01-16T13:41 :31.6002 36.4888 -99 .0853 12km ENE of Mooreland, Oklahoma 7.684 3.1 ml 2015-01-16T06:53:31 .3002 36.9377 -97.9071 21 km NW of Medford, Oklahoma 4.546 3 ml 2015-01-16T03:58:19.4002 35.8155 -97.4399 7km S of Guthrie, Oklahoma 6 3.1 mb lg 2015-01-15T18:47:20.8002 36.9524 -97 .6149 8km S of Caldwell, Kansas 5.049 3.6 ml 2015-01-15T07:47:28.1002 36.715 -97.8734 16km SW of Medford, Oklahoma 5.58 3.1 mb lg 2015-01-15T07:36:31.2002 36.3294 -97.5209 21 km WNW of Perry, Oklahoma 7.045 3.3 ml 2015-01-15T06:57:07.4002 36 .9518 -97 .6158 8km S of Caldwell, Kansas 5 3 ml 2015-01 -14T18:23:11.8002 35.8765 -97.2447 7km S of Langston, Oklahoma 5.269 3 ml 2015-01-14T03:45:52.0002 36.7276 -98.3125 4km SE of Cherokee, Oklahoma 4.915 3.3 ml 2015-01-14T01 :42:36.0002 36.3318 -97.516 20km WNW of Perry, Oklahoma 7.158 3.1 ml 2015-01-14T00:46:27.6002 36.7537 -97 .5552 16km ESE of Medford, Oklahoma 5 3.1 mb lg 2015-01-14T00:06:42.4002 35 .8085 -97.4146 7km S of Guthrie, Oklahoma 6.712 3 mb lg 2015-01-13T09:59:46.4002 36.8175 -97.7066 2km ENE of Medford, Oklahoma 5.5 3.6 mb lg 2015-01-13T02: 10:25.2002 35.8755 -97.2394 7km S of Langston, Oklahoma 6.577 3.1 ml 2015-01-11T10:28:21.9002 35.805 -97.4063 8km SSE of Guthrie, Oklahoma 6.686 3.4 mwr 2015-01-1OT16:36:26.2602 37.1703 -97.9438 7km ENE of Anthony, Kansas 5 3.2 mb lg 2015-01-1OT13:27:25.0002 36.23 -97.57 26km WSW of Perry, Oklahoma 5 3.2 ml 2015-01-1OT08:39:19.1002 36.9163 -97.7994 13km NNW of Medford, Oklahoma 3.081 3 ml 2015-01-1 0T06: 14:03.3002 36.2699 -97.2469 4km ESE of Perry, Oklahoma 5.329 3.2 mb lg 2015-01-1 0T05:06:52 .6002 36.2627 -97.2732 3km SSE of Perry, Oklahoma 4.949 3.1 mb lg 2015-01-1 0T04:26:07.5002 35.8136 -97.4153 7km S of Guthrie, Oklahoma 7.063 3 ml 2015-01-09T16:51 :50.4002 36.2886 -96.8926 9km SW of Pawnee, Oklahoma 4.898 3.3 ml 2015-01-09T16:39:48. 7002 36.2842 -96.9784 16km WSW of Pawnee, Oklahoma 5.284 3.5 ml 2015-01-09T06:53:57.2002 35.8159 -97.4212 7km S of Guthrie, Oklahoma 7.452 3.1 ml 2015-01-09T06 :44: 16 .4002 35.8143 -97.418 7km S of Guthrie, Oklahoma 6.593 3.5 mwr 2015-01-08T22:03:42.2002 36.5852 -98.4708 18km WNW of Helena, Oklahoma 5 3 ml 2015-01-08T05:06:59.8002 36.8723 -98.1351 23km ENE of Cherokee, Oklahoma 7.034 3 ml 2015-01-07T19:41 :37.9002 35.8173 -97.4291 6km S of Guthrie, Oklahoma 6.933 3.8 mwr 2015-01-06T23: 10:48.3002 36.6932 -97.6764 13km SSE of Medford, Oklahoma 4.809 3 ml 2015-01-06T18:28:04.2002 36.2592 -97.2609 4km SE of Perry, Oklahoma 5.572 3.1 ml 2015-01-06T15:45: 15.3002 36.2591 -97.26 4km SE of Perry, Oklahoma 5.456 3.1 ml 2015-01-05T22:27:39.8002 36.2603 -97 .2616 4km SE of Perry, Oklahoma 4.356 3.6 mwr 2015-01-05T22:06:43.6002 36.2611 -97.2623 3km SE of Perry, Oklahoma 5 3.6 mwr 2015-01-05T13:52:06. 7002 36.7453 -98 .1112 21 km E of Cherokee, Oklahoma 6.522 3.1 ml 2015-01-05T12:57:34.8302 37.0214 -98.0891 15km SSW of Anthony, Kansas 5 3 mb lg 2015-01-05T12: 14: 19.8002 36.7411 -98.1117 21 km E of Cherokee, Oklahoma 6.598 3.5 ml 2015-01-04T21 :37 :01.3002 35.8196 -97.4362 6km S of Guthrie, Oklahoma 6.604 3.6 mwr 2015-01-04T10:55:39.8002 37.2454 -98.0233 4km S of Harper, Kansas 4.87 3.5 mb lg 2015-01-03T18:28:4 7 .2002 36.853 -98.2769 13km NNE of Cherokee, Oklahoma 6.269 3 ml 2015-01-03T16:54:48.4002 36.6592 -97.6265 18km SSE of Medford, Oklahoma 5 3.4 ml 2015-01-03T12: 16:30.6002 36.8466 -97 .8137 8km WNW of Medford, Oklahoma 6.076 3.4 ml 2015-01-02T16:52:28.5002 36.2859 -96.8989 10km SW of Pawnee, Oklahoma 4.005 3 ml Facility Decommissioning Plan - Rev 2 February 2021 Page 38 of 56

Preparer: D. Horne; Date: 02/15/21 Table 2 Revision 2 Reviewer: E. Dulle; Date: 02/15/21 Historical Earthquakes in Oklahoma Greater than 3.0 Magnitude (As of February 9, 2021)

Date and Time Latitude Longitude Epicenter Depth (km) Magnitude Maa. Tvoe 1 2015-01-02T09:23:24.200Z 36.7301 -98.3055 5km ESE of Cherokee, Oklahoma 5.566 3.1 ml 2015-01-02T00: 19:33.3002 36.8885 -98.2399 18km NE of Cherokee, Oklahoma 6.652 3.1 ml 2015-01-01T14:44:08.5002 36.8137 -97.71 2km ENE of Medford, Oklahoma 3.2 3.6 ml 2015-01-01T12:05:49.1 00Z 36.929 -97.4929 15km SE of Caldwell, Kansas 6.535 3.1 ml 2015-01-01T00:26:09.600Z 36.6558 -97.6348 18km SSE of Medford, Oklahoma 5.319 3 ml 2014-12-31T07: 19:10.20oz 36.7211 -98.1713 16km ESE of Cherokee, Oklahoma 5.836 3.1 ml 2014-12-30T21 :37:24.9002 36.7251 -98.3084 5km SE of Cherokee, Oklahoma 5.485 3.8 ml 2014-12-30T21 :24:51 .100Z 36.7255 -98.3075 5km SE of Cherokee, Oklahoma 5.55 3.9 ml 2014-12-30T15:11 :50.1 00Z 36.5709 -98 .3251 5km WNW of Helena, Oklahoma 5 3.1 ml 2014-12-30T12:43:58.9002 36.3619 -97.4506 16km WNW of Perry, Oklahoma 6.495 3.1 ml 2014-12-30T11 :05:53.5002 36.6252 -97.7233 20km S of Medford, Oklahoma 6.548 3 ml 2014-12-29T17:50:55.000Z 36.7545 -98.1778 15km E of Cherokee, Oklahoma 5 3.1 ml 2014-12-29T16: 15:55.2002 36.8363 -97.8757 13km WNW of Medford, Oklahoma 4.874 3.3 ml 2014-12-29T08:30:05.1 ooz 36.361 -97.4511 16km WNW of Perry, Oklahoma 5 3 ml 2014-12-28T10:02 :56. 700Z 35.8147 -97.4181 7km S of Guthrie, Oklahoma 7.123 3 ml 2014-12-27T16:39:57.000Z 36.2837 -96.8918 9km SW of Pawnee, Oklahoma 4.466 3.4 ml 2014-12-27T11: 17:14.5002 35.9107 -97.2513 3km S of Langston, Oklahoma 4.832 3 ml 2014-12-27T03:21 :36.200Z 35.8143 -97.4177 7km S of Guthrie, Oklahoma 6.738 3 ml 2014-12-26T18:03:37.5002 35.8104 -97.416 7km S of Guthrie, Oklahoma 5.483 3.1 ml 2014-12-26T17:12:57.3002 36.8021 -98.1623 18km ENE of Cherokee, Oklahoma 5 3 ml 2014-12-25T23:11 :36.400Z 36 .368 -97 .0684 21 km ENE of Perry, Oklahoma 1.98 3.9 ml 2014-12-25T20:32:49.500Z 35.8124 -97.4167 7km S of Guthrie, Oklahoma 6.945 3.5 mwr 2014-12-23T20:35:28.400Z 36.8913 -97.6911 10km NNE of Medford, Oklahoma 5.554 3 ml 2014-12-22T11 :12:38.3002 36.2766 -97 .2252 5km ESE of Perry, Oklahoma 6.162 3 ml 2014-12-22T07:45:07.01 OZ 37.2649 -97.9365 8km ESE of Harper, Kansas 6.02 3.5 mb lg 2014-12-22T05:05:53.500Z 36.0671 -97 .3586 16km NW of Langston, Oklahoma 6.97 3 ml 2014-12-22T03:40:56.800Z 36 .8024 -98.1933 15km ENE of Cherokee, Oklahoma 5 3.6 mwr 2014-12-21T18:42:55 .3002 36 .6285 -97.7101 19km S of Medford, Oklahoma 4.018 3.4 ml 2014-12-21T18:36:00.1 ooz 36.6267 -97 .7149 20km S of Medford, Oklahoma 4.664 3.4 ml 2014-12-21T15:44:05.8002 36.9379 -97.7253 14km SW of Caldwell, Kansas 1.487 3.3 ml 2014-12-21 T08 :53 :23.400Z 36.5278 -98.227 4km ESE of Helena, Oklahoma 4.215 3 ml 2014-12-21T05:59 :04.1 00Z 36.761 -97.5719 15km ESE of Medford , Oklahoma 7.594 3.1 ml 2014-12-21T01: 17:09.4002 36.1751 -97.3867 15km SW of Perry, Oklahoma 5.187 3 ml 2014-12-19T13: 18:08.2002 36.7564 -97.5659 15km ESE of Medford, Oklahoma 4.474 3.3 ml 2014-12-18T23:06:54.000Z 36.1511 -97.4904 23km SW of Perry, Oklahoma 4.659 3.4 mwr 2014-12-16T17: 18:35.6002 36.8689 -98.1236 24km ENE of Cherokee, Oklahoma 5.638 3.1 ml 2014-12-16T17:01 :26.800Z 36.8676 -98.1224 24km ENE of Cherokee, Oklahoma 5.69 3.4 ml 2014-12-15T18:22:17.000Z 35.4929 -96.8293 6km E of Meeker, Oklahoma 6.581 3 ml 2014-12-15T17:01 :56. 700Z 36.1821 -97.3721 14km SSW of Perry, Oklahoma 5.78 3.2 ml 2014-12-15T02:32:50. 700Z 36.3126 -96.7571 5km SE of Pawnee, Oklahoma 4.047 3 ml 2014-12-14T22:22:55.200Z 36.3274 -97.5262 21 km W of Perry, Oklahoma 6.641 3.2 ml 2014-12-14T21 :18:20.5002 36.3187 -96 .7553 4km ESE of Pawnee, Oklahoma 4.679 4 mwr 2014-12-14T21 :07:13.4002 36.3245 -97.5351 22km W of Perry, Oklahoma 6.649 3.1 ml 2014-12-14T16:09:47.5002 36.3274 -97.5343 22km W of Perry, Oklahoma 5.511 3 ml 2014-12-14T15:48:41.6002 36.3258 -97 .5324 22km W of Perry, Oklahoma 6.423 3.8 ml 2014-12-14T10: 19:54.7002 36.3176 -96 .7569 4km ESE of Pawnee, Oklahoma 5.221 3.1 ml 2014-12-14T09:14:21.1 DOZ 36.8706 -98.1272 24km ENE of Cherokee, Oklahoma 5.413 3.9 mwr 2014-12-14T05:01 :42.300Z 36.3251 -97.5296 22km W of Perry, Oklahoma 6.574 3 ml 2014-12-13T09:51 :30.700Z 36.3241 -97.5347 22km W of Perry, Oklahoma 6.495 3.6 ml 2014-12-12T19:48:36.9002 36.2623 -97.0378 16km N of Stillwater, Oklahoma 5.088 3.3 ml 2014-12-12T11 :31 :46.400Z 36.3524 -97.091 19km ENE of Perry, Oklahoma 8.474 3.3 ml 2014-12-11T20:51 :03.200Z 36.8707 -98.1223 24km ENE of Cherokee, Oklahoma 5.615 3.4 ml 2014-12-11T19:57:45.8002 36.9511 -97 .7998 17km NNW of Medford, Oklahoma 5 3.1 ml 2014-12-11T07:53:49.400Z 36.7616 -98.0542 27km E of Cherokee, Oklahoma 3.663 3.8 mwr 2014-12-1OT17:43:23. 700Z 36.1473 -97.0076 5km NE of Stillwater, Oklahoma 5.516 3 ml 2014-12-1OT16:47:45.3002 36.8722 -98.1235 24km ENE of Cherokee, Oklahoma 5.318 3 ml 2014-12-1OT10:09: 13.900Z 35.8176 -97.4329 6km S of Guthrie, Oklahoma 4.865 3.1 ml 2014-12-1 0T06:39:25.200Z 36.8405 -97.8152 8km WNW of Medford, Oklahoma 5.651 3.1 ml Facility Decommissioning Plan - Rev 2 February 2021 Page 39 of 56

Preparer: D. Horne; Date: 02/15/21 Table 2 Revision 2 Reviewer: E. Dulle; Date: 02/15/21 Historical Earthquakes in Oklahoma Greater than 3.0 Magnitude (As of February 9, 2021)

Date and Time Latitude Longitude Epicenter Depth (km) Magnitude Maa. Tvoe 1 2014-12-09T08:38:01.3002 36.751 -97.556 17km ESE of Medford, Oklahoma 4.531 3.2 ml 2014-12-09T06:28:33.1002 35.8188 -96 .8213 14km NNE of Chandler, Oklahoma 6.036 3.7 ml 2014-12-08T14:05:51.8002 35.7378 -97.5863 13km NW of Edmond, Oklahoma 6.978 3.2 ml 2014-12-07T22:13:08.3002 35.8197 -97.4393 6km S of Guthrie, Oklahoma 5.147 3.6 mwr 2014-12-07T20:57:22 .5002 34.1752 -96.7559 9km N of Madill, Oklahoma 5 3 ml 2014-12-06T07:04:22 .1002 36.7612 -98 .0514 27km E of Cherokee, Oklahoma 5.8 3.2 ml 2014-12-05T03:54:22.5002 36.023 -97.0946 7km NW of Perkins, Oklahoma 4.007 3.7 mwr 2014-12-04T23:29:58.8002 35.8999 -97 .2543 5km S of Langston, Oklahoma 4.961 3.1 ml 2014-12-04T18:04:17.8002 36.758 -97 .5781 14km ESE of Medford, Oklahoma 5 3.5 ml 2014-12-04T11 :34:52.3002 36.2871 -97.4335 13km W of Perry, Oklahoma 7.177 3 ml 2014-12-04T09:47:43.5202 37.1969 -98 .0016 5km NNE of Anthony, Kansas 6.68 3.1 mb lg 2014-12-04T08:38:29.4002 36.4207 -97 .2902 14km N of Perry, Oklahoma 7.671 3 ml 2014-12-04T06:39:43.3002 35.8197 -97.4383 6km S of Guthrie, Oklahoma 5 3.2 mwr 2014-12-03T13:33:33.6002 36.5021 -99 .0279 17km ENE of Mooreland, Oklahoma 6.661 3.7 ml 2014-12-02T16:25:53.5002 36.1767 -97 .2641 12km S of Perry, Oklahoma 4.973 3 ml 2014-12-02T12:40:13.5202 37.2621 -97 .6335 14km S of Conway Springs, Kansas 7.78 3 mb lg 2014-12-02T12:04:29.4002 35.671 -97 .3788 9km ENE of Edmond, Oklahoma 7.103 3.4 mwr 2014-12-01T17:57:28.7002 36.4955 -99.0834 12km ENE of Mooreland, Oklahoma 8.502 3.3 mwr 2014-11-30T12:18:58.7002 35.6727 -97 .3788 9km ENE of Edmond, Oklahoma 6.265 3.3 mwr 2014-11-30T10:24:44.4002 36.6028 -97 .6068 25km SSE of Medford, Oklahoma 5.684 4 mwr 2014-11-30T08:54:36.0002 36.6013 -97 .7654 22km S of Medford, Oklahoma 5 3 ml 2014-11-30T06:59:56.0002 35.5382 -96.7714 9km NW of Prague, Oklahoma 6.89 3.6 mwr 2014-11-28T08:36:36.1002 36.6286 -97 .981 27km NNW of Enid, Oklahoma 5.846 3 ml 2014-11-28T03:35:25.9002 36.8192 -97.711 2km NE of Medford, Oklahoma 4.853 3 ml 2014-11-27T00:54:23.9002 36.5886 -97 .8084 22km NNE of Enid, Oklahoma 6.198 3.1 ml 2014-11-26T19:29:19.0002 35.8173 -97.4303 6km S of Guthrie, Oklahoma 5.551 3 ml 2014-11-26T16:54:04.4002 36.1146 -97.3101 19km S of Perry, Oklahoma 4.272 3.1 ml 2014-11-26T14:56:40.6002 35.8153 -97.419 7km S of Guthrie, Oklahoma 5.314 3.3 ml 2014-11-26T09:14:25.8002 36.8171 -97.7105 2km ENE of Medford, Oklahoma 5.37 3 ml 2014-11-25T23:32:55.2002 36.8106 -97.8672 11 km W of Medford, Oklahoma 5.575 3.5 ml 2014-11-25T22:04:21.8002 35.8184 -97.4304 6km S of Guthrie, Oklahoma 4.818 3.4 mwr 2014-11-25T14:43:40.0002 36.8201 -97.7191 1km NE of Medford, Oklahoma 4.129 3.6 mwr 2014-11-25T01 :43:39.3002 36.8567 -97.8444 11km WNW of Medford, Oklahoma 3.901 3 ml 2014-11-25T0O: 16:51.7002 35.8167 -97.4363 6km S of Guthrie, Oklahoma 5 3 ml 2014-11-24T19:05:57.5002 36.8728 -98.3353 13km N of Cherokee, Oklahoma 5.326 3.7 mwr 2014-11-24T14:08: 10.3002 36.3264 -97.5278 21 km W of Perry, Oklahoma 6.869 3 ml 2014-11-24T08:28:31.0002 35.816 -97.433 7km S of Guthrie, Oklahoma 6.17 3.5 ml 2014-11-24T07:17:17.4002 36.118 -97 .2475 17km W of Stillwater, Oklahoma 3.956 3 ml 2014-11-24T06:55:53.7002 36.327 -97.5289 22km W of Perry, Oklahoma 7.374 3.4 ml 2014-11-24T06:36:08.6002 36 .3276 -97.531 22km W of Perry, Oklahoma 5 3.8 mwr 2014-11-23T04:50:23.2002 35.4947 -97 .2623 0km ESE of Choctaw, Oklahoma 6.846 3 ml 2014-11-23T04:25:58.4002 36.8291 -97.8669 12km WNW of Medford, Oklahoma 5 3.4 ml 2014-11-22T18:31 :34.8002 36.5947 -97.6484 24km SSE of Medford, Oklahoma 4.483 3.1 ml 2014-11-22T14:54:45.6002 36.6375 -97.7712 19km S of Medford, Oklahoma 6.09 3 ml 2014-11-22T14:36:06.3002 36.64 -97 .7734 18km S of Medford, Oklahoma 6.197 3.5 ml 2014-11-22T09:39:29.0002 36.7562 -97.5783 14km ESE of Medford, Oklahoma 5.106 3.7 ml 2014-11-22T02:39:42.0002 36.1182 -97.4354 23km SW of Perry, Oklahoma 5.784 3.1 ml 2014-11-21T14:56:17.2002 36.8791 -98.2434 17km NE of Cherokee, Oklahoma 4.459 3 ml 2014-11-21T13:03:42.4002 36.8464 -97.8961 15km WNW of Medford, Oklahoma 5.469 3.3 ml 2014-11-19T14: 17:29.5002 36.9952 -97.9171 20km SSE of Anthony, Kansas 7.63 3.2 mb lg 2014-11-19T13:28:52.7002 36.1967 -96.7209 9km NNW of Yale, Oklahoma 5.266 3 ml 2014-11-19T12: 19:02.1002 36.8446 -97 .8991 15km WNW of Medford, Oklahoma 5 3.1 ml 2014-11-19T04:06:50.9002 36.5897 -98.2562 4km NNE of Helena, Oklahoma 6.164 3.1 ml 2014-11-19T03:34:24.7002 35.9281 -97.4407 5km NNW of Guthrie, Oklahoma 5.895 3.3 ml 2014-11-18T21:43:55.1002 36.2809 -96 .9742 16km WSW of Pawnee, Oklahoma 5 3.4 ml 2014-11-18T16:16:07.6002 36.8659 -98.3346 12km N of Cherokee, Oklahoma 5 3.6 ml 2014-11-17T20:40:52 .3002 36.4215 -97.037 22km WNW of Pawnee, Oklahoma 5 3 ml 2014-11-17T02:21 :01 .6502 37.1918 -98.0232 4km N of Anthony, Kansas 5.57 3.1 mb lg Facility Decommissioning Plan - Rev 2 February 2021 Page 40 of 56

Preparer: D. Horne; Date: 02/15/21 Table 2 Revision 2 Reviewer: E. Dulle; Date: 02/15/21 Historical Earthquakes in Oklahoma Greater than 3.0 Magnitude (As of February 9, 2021) 1 Date and Time Latitude Longitude Epicenter Depth (km) Magnitude Maa. Tvoe 2014-11-16T22:41 :49.6002 36.2796 -97.2361 4km ESE of Perry, Oklahoma 2.806 3.3 ml 2014-11-16T10:32:40.4002 36.2777 -96.9308 13km WSW of Pawnee, Oklahoma 4.902 3.2 ml 2014-11-16T08:59:12.5702 37.1778 -98.019 2km NNE of Anthony, Kansas 6.26 3.1 mb lg 2014-11-16T07:26:40.1002 36.0649 -97 .3241 14km NNW of Langston, Oklahoma 4.743 3.4 ml 2014-11-15T13:39:57 .6002 36.6169 -97.7098 21 km S of Medford, Oklahoma 6.204 3.4 ml 2014-11-15T10:18: 13.4702 37.2293 -98 .0328 6km S of Harper, Kansas 6.4 3.8 mwr 2014-11-14T15:41 :54.7002 36.0238 -97.0914 7km NW of Perkins, Oklahoma 4.651 3 ml 2014-11-14T11:58:31 .1002 36.6258 -98 .0001 25km ENE of Helena, Oklahoma 3.524 3.6 ml 2014-11-14T07:43:23.8002 36.8431 -97.8774 13km WNW of Medford, Oklahoma 4.849 3 ml 2014-11-14T07:34:56.8002 36.8442 -97.8855 14km WNW of Medford, Oklahoma 4.438 3.1 ml 2014-11-14T07: 10: 19.8002 36.8477 -97.8768 13km WNW of Medford, Oklahoma 4.874 3 ml 2014-11-14T07:06:51.0002 36.8455 -97.8767 13km WNW of Medford, Oklahoma 5.159 3.3 ml 2014-11-14T03:54:32.5002 36.1653 -96.9009 15km ENE of Stillwater, Oklahoma 5.856 3 ml 2014-11-13T14:34:23.8002 36.7532 -97 .5616 16km ESE of Medford, Oklahoma 4.265 3.2 ml 2014-11 -13T01 :28:31.3002 35.3504 -96.5389 16km SSW of Boley, Oklahoma 3.079 3.6 mwr 2014-11-12T21 :40:00.5502 37.2713 -97.6206 13km S of Conway Springs, Kansas 4.03 4.9 mww 2014-11-12T21 :37:11.0002 36.6485 -97.6016 21 km SE of Medford, Oklahoma 5.37 3.1 ml 2014-11-11T23:17:11 .7002 36.765 -97.5605 16km ESE of Medford, Oklahoma 6.813 3 ml 2014-11-11T14:09:41.9002 36.7559 -97.5648 16km ESE of Medford , Oklahoma 5.173 3.5 ml 2014-11-1 0T02:30:56 .7002 36.7555 -97.5646 16km ESE of Medford, Oklahoma 4.062 3.5 ml 2014-11-1 0T02: 11 :30.3002 36.0242 -97.093 7km NW of Perkins, Oklahoma 4.74 3.1 ml 2014-11-09T20:10:18.9002 36.0244 -97 .0975 8km NW of Perkins, Oklahoma 3.412 3.8 mwr 2014-11-09T18:39:54.7002 36.3306 -97.5206 21 km WNW of Perry, Oklahoma 5 3.1 ml 2014-11-09T12:55:44.7002 36.2761 -97.2619 2km ESE of Perry, Oklahoma 7.026 3.1 ml 2014-11-09T01 :20:39.2002 36.7135 -98.0413 27km NE of Helena, Oklahoma 4.733 3 ml 2014-11-09T00:35:15.5002 36.3298 -97.5266 21 km WNW of Perry, Oklahoma 11.185 3.3 mwr 2014-11-08T10: 10: 18.5002 36.3933 -97.2978 11 km N of Perry, Oklahoma 6.373 3 ml 2014-11-08T09:28:00.8002 36.1734 -96.8468 14km WNW of Yale, Oklahoma 5.264 3 ml 2014-11-07T20:08:51.4002 36.6065 -97.8147 23km SSW of Medford, Oklahoma 5.876 3.2 ml 2014-11-06T01 :35:02. 7902 37.2082 -98.039 6km N of Anthony, Kansas 10.67 3.2 mb lg 2014-11-05T10:07:27.4002 37.1979 -98.0516 5km NNW of Anthony, Kansas 8.09 3.2 mb lg 2014-11-05T02:05:38.7002 36.5865 -97.7806 22km NNE of Enid, Oklahoma 5 3 ml 2014-11-04T23:13:50.3002 35.4607 -97.0329 5km ENE of McLoud, Oklahoma 6.261 3.2 ml 2014-11-04T16:46:37 .2002 36.5872 -97.7776 23km NNE of Enid, Oklahoma 5 3 ml 2014-11-04T04:16:48.7002 36.7535 -97.5583 16km ESE of Medford, Oklahoma 4.322 3 ml 2014-11 -03T22:16:50.9002 35.7762 -97.4563 11 km SSW of Guthrie, Oklahoma 4.906 3 ml 2014-11-03T07:10:32.5002 35.6073 -97.2105 6km SSW of Luther, Oklahoma 6.009 3.3 ml 2014-11-03T05:58:29.1002 35.6063 -97.2121 6km SSW of Luther, Oklahoma 5.941 3 ml 2014-11-02T00:58:36.1002 36.8427 -97.7538 4km NNW of Medford, Oklahoma 3.653 3.1 ml 2014-11-01T06:03:16.0002 36.0481 -97 .2529 11 km N of Langston, Oklahoma 5 3 mwr 2014-10-31 T06:22:59.4002 36.4912 -99.0812 12km ENE of Mooreland, Oklahoma 7.446 3.4 mwr 2014-10-31T00:49:33.9002 36.6076 -97.6706 22km SSE of Medford, Oklahoma 3.584 3.1 ml 2014-10-31 T00:39:28.3002 35.9662 -97.3781 10km NNE of Guthrie, Oklahoma 4.542 3.2 ml 2014-10-30T18:57:02.1002 36.045 -97.2577 11 km N of Langston, Oklahoma 3.793 3.3 mwr 2014-10-29T16:53:31.6002 35.7338 -97.5268 10km NNW of Edmond, Oklahoma 5.947 3.1 mwr 2014-10-29T00:29:08.9002 36.1112 -97.4324 22km NE of Crescent, Oklahoma 2.988 3.1 ml 2014-10-27T10:42:30.3002 36.4996 -99.0809 12km ENE of Mooreland, Oklahoma 7.121 3.5 ml 2014-10-26T18:23:10.0002 36.4904 -99.0885 11 km ENE of Mooreland, Oklahoma 8.649 3.7 ml 2014-10-25T20:21 :10.3002 36.5062 -99.0278 17km ENE of Mooreland, Oklahoma 5 3.1 ml 2014-10-25T17:10:54.3002 35.5446 -97.2373 5km NNE of Choctaw, Oklahoma 6.819 3.2 ml 2014-10-25T12:36:15.0002 35.8596 -97.3044 10km SSW of Langston, Oklahoma 5 3.1 ml 2014-10-23T07:06:03.0002 36.6797 -97.7149 14km S of Medford, Oklahoma 3.899 3.1 ml 2014-10-22T23:48:07.7602 37 .0294 -97.8876 18km SE of Anthony, Kansas 5.9 3.3 mb lg 2014-10-22T22:31 :29.8002 36.4994 -99.0632 14km ENE of Mooreland, Oklahoma 7.259 3.2 ml 2014-10-22T15:58:22.2002 36.5028 -99.0603 14km ENE of Mooreland, Oklahoma 6.907 3.5 ml 2014-10-21 T11 :55:43.9802 37.0377 -97 .8947 17km SE of Anthony, Kansas 5.15 3 mb lg 2014-10-21 T08:55:46.2002 36.6352 -97.7001 19km S of Medford, Oklahoma 3.93 3 ml 2014-10-21 T00:46: 17.8002 36.7435 -97.8837 15km WSW of Medford, Oklahoma 2.392 3.3 ml Facility Decommissioning Plan - Rev 2 February 2021 Page 41 of 56

Preparer: D. Horne; Date: 02/15/21 Table 2 Revision 2 Reviewer: E. Dulle; Date: 02/15/21 Historical Earthquakes in Oklahoma Greater than 3.0 Magnitude (As of February 9, 2021) 1 Date and Time Latitude Longitude Epicenter Depth (km) Magnitude Maa. Tvoe 2014-10-20T20:34:16.000Z 35.4166 -96.5579 10km SW of Boley, Oklahoma 4.833 3.5 ml 2014-10-20T15:35:29.5002 36.6799 -98 .1,584 17km NE of Helena, Oklahoma 3.764 3 ml 2014-10-20T14:25:02.61 OZ 37.0422 -97.9304 15km SE of Anthony, Kansas 4.81 3.1 mb lg 2014-10-19T17:11 :17.000Z 36.4931 -99.0461 15km ENE of Mooreland, Oklahoma 3.988 3 ml 2014-10-19T03:04:01 .000Z 36.2797 -96.9232 12km WSW of Pawnee, Oklahoma 6.007 3 ml 2014-10-19T01 :49:44.1 00Z 36.2821 -96.9302 12km WSW of Pawnee, Oklahoma 5 3 ml 2014-10-19T01 :16:13.1 00Z 36.2852 -96.9284 12km WSW of Pawnee, Oklahoma 4.364 3.4 ml 2014-10-18T19:26:13.2002 36.2042 -97.5339 24km WSW of Perry, Oklahoma 4.83 3 ml 2014-10-18T12:34:23.8002 36.5076 -99 .0579 15km ENE of Mooreland, Oklahoma 5 3 ml 2014-10-17T16:56:42 .3002 36.2135 -97.5384 24km WSW of Perry, Oklahoma 5 3.3 ml 2014-10-17T16:4 7:41 .7002 36.5133 -99.0507 16km ENE of Mooreland, Oklahoma 6.113 3.2 ml 2014-10-17T15: 11 :23.4002 35.8185 -97.415 6km S of Guthrie, Oklahoma 5 3.2 ml 2014-10-17T12:51 :54.9002 36.5098 -99.0321 17km ENE of Mooreland, Oklahoma 5 3.1 ml 2014-10-17T12:43:48.8002 36.5052 -99.0832 13km NE of Mooreland, Oklahoma 6.954 3 ml 2014-10-17T08:49:37.800Z 36.5042 -99 .0668 14km ENE of Mooreland , Oklahoma 7.754 3.1 ml 2014-10-15T12:33:39.3002 36.3337 -97.5823 26km W of Perry, Oklahoma 5 3 ml 2014-10-15T09:51 :16.2002 36.5032 -99.0519 15km ENE of Mooreland, Oklahoma 7.859 3.5 ml 2014-10-14T18:28:32.1 00Z 36.3507 -97.0931 18km ENE of Perry, Oklahoma 4.531 3.1 ml 2014-10-14T06:26:18.800Z 36.6573 -97.9028 22km SW of Medford, Oklahoma 2.337 3.3 ml 2014-10-14T05:06:01 .300Z 35.813 -97.4106 7km S of Guthrie, Oklahoma 3.158 3.1 ml 2014-10-14T04:55:44.800Z 36.5189 -98.4728 18km W of Helena, Oklahoma 3.502 3.3 ml 2014-10-14T01 :18:06.8002 35.4777 -97.3543 3km WSW of Nicoma Park, Oklahoma 6.238 3 ml 2014-10-13T16:03: 11.5902 36.82 -97.718 2km NE of Medford, Oklahoma 3.4 3 ml 2014-10-13T12:24:54.2002 35.7341 -97.5254 9km NNW of Edmond, Oklahoma 5 3.2 mwr 2014-10-13T08:58:19.500Z 36.6512 -97.9235 24km SW of Medford, Oklahoma 5 3.1 ml 2014-10-13T01 :44:30.100Z 36.2869 -96.9192 11 km WSW of Pawnee, Oklahoma 7.708 3.2 ml 2014-10-12T19:40:43.000Z 36.6702 -98.3018 10km SSE of Cherokee, Oklahoma 3.506 3 ml 2014-10-12T16:03:25.8402 37.2385 -97.9767 6km SE of Harper, Kansas 8.02 3.2 mb lg 2014-10-1OT17:26:20.5002 35 .7476 -97.1228 11 km NE of Luther, Oklahoma 3.562 3.1 ml 2014-10-1OT16: 18:24. 7002 35 .7503 -97.1212 11 km NE of Luther, Oklahoma 3.267 3.2 mwr 2014-10-1OT13:51 :21.000Z 35 .9466 -96.7594 4km S of Cushing, Oklahoma 5 4.2 mwr 2014-10-1 0T07:38:35.400Z 35.8181 -97.4177 6km S of Guthrie, Oklahoma 4.687 3 ml 2014-10-1 0T04:58:51.090Z 37.009 -97 .976 16km SSE of Anthony, Kansas 5.5 3.2 mb lg 2014-10-08T19:44:12.6002 36 .1773 -97.2558 12km SSE of Perry, Oklahoma 5.222 3.3 mwr 2014-10-08T01 :48:28.000Z 35.7505 -97.1204 11 km NE of Luther, Oklahoma 4.566 3.2 mwr 2014-10-07T23:57:39.400Z 35.944 -96.779 4km SSW of Cushing, Oklahoma 3.342 3 ml 2014-10-07T16:51: 13.1 00Z 35.9474 -96.7642 4km S of Cushing, Oklahoma 5.28 4 mwr 2014-10-07T12:03:52.7002 36.3156 -97.0331 20km W of Pawnee, Oklahoma 7.933 3.1 ml 2014-10-05T10:24:50.9002 35.8171 -97.422 6km S of Guthrie, Oklahoma 4.776 3 ml 2014-10-05T01 :10:31 .6002 36.6154 -98.3578 10km NW of Helena, Oklahoma 5.674 3.2 ml 2014-10-04T20:23:08.900Z 36.8451 -97.8812 13km WNW of Medford, Oklahoma 5.711 3.1 ml 2014-10-04T14:11 :24.4002 36.3083 -96.9706 15km WSW of Pawnee, Oklahoma 5 3 ml 2014-10-03TOO: 19: 11.2002 36.8499 -97 .8521 11 km WNW of Medford, Oklahoma 4.152 3.1 ml 2014-10-02T22:50:48.990Z 37.2431 -97 .9651 7km SE of Harper, Kansas 5 3.1 mb lg 2014-10-02T18:35:43.0802 37 .2397 -97 .9766 6km SE of Harper, Kansas 5 3.4 mb lg 2014-10-02T18:03:43.4902 37.2324 -97 .9748 7km SE of Harper, Kansas 5 3.1 mwr 2014-10-02T18:02:55.3502 37 .2332 -97.9668 7km SE of Harper, Kansas 5 3.5 mwr 2014-10-02T18:01 :24.4002 37.2447 -97 .9553 7km SE of Harper, Kansas 5 4 .3 mwr 2014-10-01 T22: 15:01 .2002 35.8158 -97.4202 7km S of Guthrie, Oklahoma 4.556 3 ml 2014-10-01T19:24: 16.000Z 36.8599 -97.861 12km WNW of Medford, Oklahoma 4.493 3 ml 2014-10-01T18:18:55.3002 36.7654 -97.9862 23km WSW of Medford, Oklahoma 5 3.6 ml 2014-10-01 T06: 11 :05.1302 37.2592 -97 .9429 7km ESE of Harper, Kansas 5 3.3 mb lg 2014-10-01 T00:33:29.2602 37.3919 -95.3825 12km WNW of Parsons, Kansas 9.22 3 mb lg 2014-09-30T22: 12: 10.4002 35.5909 -97.3945 7km NNW of Spencer, Oklahoma 6.518 3 ml 2014-09-30T16:47:57.8402 37.2469 -97 .984 5km SE of Harper, Kansas 5 3.1 mb lg 2014-09-30T15:24:31.2402 37.2491 -97.9718 6km SE of Harper, Kansas 5 3.1 mb lg 2014-09-30T14:55:04.6502 37.2212 -97.9626 9km NE of Anthony, Kansas 3.22 3.8 mwr 2014-09-30T12:30:25.91 OZ 37.2481 -97.9352 9km ESE of Harper, Kansas 5 3.3 mb lg Facility Decommissioning Plan - Rev 2 February 2021 Page 42 of 56

Preparer: D. Horne; Date: 02/15/21 Table 2 Revision 2 Reviewer: E. Dulle; Date: 02/15/21 Historical Earthquakes in Oklahoma Greater than 3.0 Magnitude (As of February 9, 2021)

Date and Time Latitude Longitude Epicenter Depth (km) Magnitude Ma~. Tvoe 1 2014-09-30T06:21 :59.800Z 36.1727 -97.2471 13km SSE of Perry, Oklahoma 4.141 3 ml 2014-09-30T06:06:01 .100Z 36.2142 -97 .5356 23km WSW of Perry, Oklahoma 3.953 3.2 mwr 2014-09-30T05: 35: 36 .800Z 36.2093 -97.5363 24km WSW of Perry, Oklahoma 5 3 ml 2014-09-30T03:01 :25.900Z 36.2237 -97.5535 24km WSW of Perry, Oklahoma 2.2 4 mwr 2014-09-29T14:43:39.500Z 36.0776 -97.23 14km N of Langston, Oklahoma 3.999 3.1 ml 2014-09-28T02:26:03.000Z 36.3908 -97.152 16km NE of Perry, Oklahoma 5 3.2 ml 2014-09-27T12:29:20.100Z 35.8264 -97.4327 5km S of Guthrie, Oklahoma 4.442 3.1 ml 2014-09-27T12: 14:49.100Z 35.82 -97.4318 6km S of Guthrie, Oklahoma 5 3.4 mwr 2014-09-26T13:27:38.500Z 36.3028 -96.9742 15km WSW of Pawnee, Oklahoma 5 3.2 ml 2014-09-24T05:49:33.700Z 36.4035 -96.7616 8km NNE of Pawnee, Oklahoma 5.417 3.5 mwr 2014-09-23T13:37: 10.900Z 34.6213 -97.556 24km S of Lindsay, Oklahoma 5 3 ml 2014-09-23T10:34:00.900Z 35.8184 -97.4203 6km S of Guthrie, Oklahoma 5 3 ml 2014-09-23T07:58:02.800Z 35.4467 -96.5259 6km SW of Boley, Oklahoma 3.893 3.3 ml 2014-09-22T19:28:34.700Z 34.6292 -97.5457 23km SSE of Lindsay, Oklahoma 5 3.6 ml 2014-09-21 T00:36: 12.1 00Z 35.8207 -97.4231 6km S of Guthrie, Oklahoma 4.772 3.1 ml 2014-09-20T07: 10: 18.800Z 36 .822 -97 .7235 1km NNE of Medford, Oklahoma 3.693 3 ml 2014-09-19T17:23:17.800Z 35.8185 -97.4199 6km S of Guthrie, Oklahoma 4.281 3.6 mwr 2014-09-19T10:55 :21.000Z 36.8209 -97.7187 2km NE of Medford , Oklahoma 4.408 3 ml 2014-09-1 9T05: 08:02. 900Z 36.1779 -97.2593 12km SSE of Perry, Oklahoma 5 3.3 ml 2014-09-19T01 :34 :34.600Z 36.6022 -97.6084 25km SSE of Medford, Oklahoma 5.26 3.3 ml 2014-09-19T01 :31 :53.500Z 36.6028 -97.6131 25km SSE of Medford, Oklahoma 4.564 3.8 mwr 2014-09-19T00:08:03.200Z 35.818 -97.4225 6km S of Guthrie, Oklahoma 4.488 3 ml 2014-09-18T19:52:32.000Z 36.2725 -97 .2529 3km ESE of Perry, Oklahoma 3.288 3.2 ml 2014-09-18T07:12:40.400Z 36.1813 -97 .2693 12km S of Perry, Oklahoma 5.214 3.8 mwr 2014-09-17T13:21 :54.600Z 36.1783 -97.2639 12km S of Perry, Oklahoma 3.334 3.3 mwr 2014-09-17T12:02:55.1 00Z 36.1468 -96.8081 10km WNW of Yale, Oklahoma 7.48 3.2 ml 2014-09-17T11 :58:26.1 00Z 36.1479 -96.8049 10km WNW of Yale, Oklahoma 7.234 3 ml 2014-09-17T11 :09:05.200Z 36.846 -97.8781 13km WNW of Medford, Oklahoma 5.581 3.2 ml 2014-09-16T22:35:03.900Z 36.8204 -97 .715 2km NE of Medford, Oklahoma 4.238 3.2 ml 2014-09-16T06: 16:30.400Z 35.8204 -97.4227 6km S of Guthrie, Oklahoma 4.452 3 ml 2014-09-15T20: 14: 12.500Z 35.8203 -97.4257 6km S of Guthrie, Oklahoma 4.966 3.2 ml 2014-09-15T20:08:03.300Z 35.8141 -97.4275 7km S of Guthrie, Oklahoma 4.82 3.9 mwr 2014-09-15T13:27:40.1 00Z 36.6337 -97.9813 27km NNW of Enid, Oklahoma 4.009 3.1 ml 2014-09-15T09:21 :22.400Z 36.8405 -98.2455 13km NE of Cherokee, Oklahoma 3.551 3.1 ml 2014-09-15T00: 11: 16.500Z 35.8164 -97.4177 6km S of Guthrie, Oklahoma 4.324 3.1 ml 2014-09-14T12:01 :02.500Z 36.6289 -97.9818 27km NNW of Enid, Oklahoma 5 3.5 mwr 2014-09-14T04: 10:05.1 00Z 36.1785 -97.2678 12km S of Perry, Oklahoma 5.267 3.3 ml 2014-09-13T20:01 :07.600Z 36.1963 -97.4148 15km SW of Perry, Oklahoma 5 3 ml 2014-09-13T16:58: 10.1 00Z 36.2223 -97 .5547 25km WSW of Perry, Oklahoma 3.186 3.2 ml 2014-09-13T08:22:30.600Z 36 .6233 -97.6933 20km S of Medford, Oklahoma 4.68 3.4 ml 2014-09-12T14:41 :55.900Z 36.1839 -97.2705 11 km S of Perry, Oklahoma 3.746 3.7 mwr 2014-09-1 0T00: 11 :42. 700Z 36.9682 -97.7852 17km WSW of Caldwell, Kansas 7.509 3.3 ml 2014-09-09T19:49:28.000Z 36 .1783 -96.9684 10km NE of Stillwater, Oklahoma 5.993 3 ml 2014-09-09T10:06:44.100Z 36.217 -97 .3944 12km SW of Perry, Oklahoma 11.684 3 ml 2014-09-09T09:06:46.500Z 36.1976 -97.4119 15km SW of Perry, Oklahoma 5 3.4 mwr 2014-09-08T21 :02: 14.900Z 36 .8539 -97.8867 14km WNW of Medford, Oklahoma 6.175 3.5 ml 2014-09-08T18:04:22.500Z 36.8141 -97 .7236 1km NE of Medford, Oklahoma 3.021 3.6 ml 2014-09-08T16:21 :34.000Z 36.821 -97.7216 1km NE of Medford, Oklahoma 5 3.9 mwr 2014-09-08T15:23:30.570Z 37.305 -97 .6059 10km SSE of Conway Springs, Kansas 5.4 3.2 mb lg 2014-09-08T 12: 56: 52. 900Z 37.2625 -97.6346 14km S of Conway Springs, Kansas 5 3.4 mwr 2014-09-08T01 :52:57.600Z 36.82 -97 .7158 2km NE of Medford, Oklahoma 4.742 3.1 ml 2014-09-06T18:53:59.1 00Z 36.6357 -97.7 19km S of Medford, Oklahoma 5 3.4 mwr 2014-09-04T23:32:05.600Z 36.1983 -97.4191 15km SW of Perry, Oklahoma 5 3.3 mwr 2014-09-04T23:02:42 .200Z 36 .1973 -97.4039 14km SW of Perry, Oklahoma 3.702 3 ml 2014-09-04T11 :41 :20.400Z 36.5792 -97 .6055 27km SSE of Medford, Oklahoma 5 3.4 ml 2014-09-02T08:05: 10.300Z 36.5191 -98.4726 18km W of Helena, Oklahoma 4 .12 3.4 ml 2014-09-02T04: 58: 06.600Z 36.7184 -97 .9189 19km WSW of Medford, Oklahoma 13.438 3.3 ml 2014-09-01T18:31 :06.300Z 36.7266 -97 .9132 18km WSW of Medford, Oklahoma 5 3.2 ml Facility Decommissioning Plan - Rev 2 February 2021 Page 43 of 56

Preparer: D. Horne; Date: 02/15/21 Table 2 Revision 2 Reviewer: E. Dulle; Date: 02/15/21 Historical Earthquakes in Oklahoma Greater than 3.0 Magnitude (As of February 9, 2021)

Date and Time Latitude Longitude Epicenter Depth (km) Magnitude Ma~. Tvoe 1 2014-09-01T17:36: 12.6002 36.9043 -97.7616 11 km NNW of Medford, Oklahoma 5 3 ml 2014-09-01111 :46:49.2002 36.1954 -97.4061 14km SW of Perry, Oklahoma 3.956 3 ml 2014-08-31122:04:51.8002 35.5875 -97.3212 3km NW of Jones, Oklahoma 5.289 3.1 ml 2014-08-31118:49:01.4002 35.5881 -97.3216 3km NW of Jones, Oklahoma 4.861 3.2 ml 2014-08-31116:57:17.0002 36.625 -97.9865 26km ENE of Helena, Oklahoma 4.917 3.4 ml 2014-08-31 T07:20: 19.8002 36.6189 -97.9985 25km ENE of Helena, Oklahoma 5.217 3.4 mwr 2014-08-29115:39:25.3002 35.8189 -97.4313 6km S of Guthrie, Oklahoma 3.61 3.2 ml 2014-08-29109:52: 13.5002 36.2212 -97.5554 25km WSW of Perry, Oklahoma 3.488 3 ml 2014-08-29103:01 :27.0602 36.254 -97.4547 15km WSW of Perry, Oklahoma 4 .74 3.1 mb lg 2014-08-27115:44:24.8002 36.0942 -97.2286 15km W of Stillwater, Oklahoma 4.814 3.2 ml 2014-08-27110:36:00.0602 35 .94 -96.8084 6km SW of Cushing, Oklahoma 2.49 3 mb lg 2014-08-26116:05: 10.0002 35.8168 -97.4346 6km S of Guthrie, Oklahoma 5 3.1 mwr 2014-08-25121 :41 :07.3002 36.1175 -97.3161 19km S of Perry, Oklahoma 5.084 3.3 ml 2014-08-25100: 10:05.0402 37.3657 -98 .1573 14km NW of Harper, Kansas 7.67 3 mb lg 2014-08-23111 :22: 12.8002 36.7201 -97 .9197 19km WSW of Medford, Oklahoma 5 3.3 ml 2014-08-23111 :06:34.0002 35.8135 -97.4358 7km S of Guthrie, Oklahoma 5.243 3 mwr 2014-08-22T19:23: 10.6002 36.8594 -98 .2553 14km NE of Cherokee, Oklahoma 3.362 3.1 ml 2014-08-20116:33:58.8402 37.2456 -97.9612 7km SE of Harper, Kansas 6.7 3.1 mb lg 2014-08-20112:38:06.2002 35.8829 -97.2688 7km S of Langston, Oklahoma 5 3 ml 2014-08-20112:27:40.2002 36.8571 -97.8673 13km WNW of Medford, Oklahoma 5 3 ml 2014-08-20111 :31 :59.3002 35.886 -97.2634 6km S of Langston, Oklahoma 4.887 3.3 ml 2014-08-20111 :01 :39.4002 35.8832 -97.2625 6km S of Langston, Oklahoma 4.463 3.1 ml 2014-08-19112:41 :35. 7002 35.7727 -97.4677 12km SSW of Guthrie, Oklahoma 4.51 4.4 mwr 2014-08-18119:14:24.3002 36.6317 -98 .188 12km NE of Helena, Oklahoma 5 3.4 ml 2014-08-18102:50:09.2002 35.372 -96.487 13km S of Boley, Oklahoma 5 3.5 mwr 2014-08-18101 :25:57.4002 36.8395 -98.2541 13km NE of Cherokee, Oklahoma 3 3.7 mwr 2014-08-17116:35:07.7002 36.8527 -97.8712 13km WNW of Medford, Oklahoma 4.808 3.1 ml 2014-08-17115:59:05.6002 36.8584 -97.8714 13km WNW of Medford, Oklahoma 5 3.1 mwr 2014-08-17106:31 : 10.3002 36.8516 -97 .8693 13km WNW of Medford, Oklahoma 5 3.2 mwr 2014-08-17106: 18:43.2002 36.8605 -97 .873 13km WNW of Medford, Oklahoma 5.009 3.4 mwr 2014-08-16110:54:24.8002 36.8611 -97 .8714 13km WNW of Medford, Oklahoma 6.097 3.4 ml 2014-08-14114:15:31.6002 35.8614 -97.3225 9km ESE of Guthrie, Oklahoma 5.117 3.2 ml 2014-08-13115:44:28.1002 36.6268 -97 .685 20km SSE of Medford, Oklahoma 5.645 3.3 ml 2014-08-12112:34:19.1002 36.044 -97.514 12km NE of Crescent, Oklahoma 5 3 ml 2014-08-1 0T22:29:04.2802 36.2885 -97.1224 14km E of Perry, Oklahoma 5 3.3 ml 2014-08-10114:54:27.2802 36.859 -97.863 12km WNW of Medford, Oklahoma 5 3.3 ml 2014-08-08120:58:40.1002 35.8156 -97.4221 7km S of Guthrie, Oklahoma 3.815 3 ml 2014-08-08120:45:37.8002 35.8142 -97.4172 7km S of Guthrie, Oklahoma 4.161 3 ml 2014-08-08120:21 :56.8002 35.8158 -97.4201 7km S of Guthrie, Oklahoma 3.897 3.3 mwr 2014-08-08118:07:48.1002 35.82 -97.429 6km S of Guthrie, Oklahoma 5 3.3 ml 2014-08-07116:39:21.4002 36.8175 -97.9961 23km W of Medford, Oklahoma 5.393 3.2 ml 2014-08-07116:03:44.4002 35.5776 -97.277 1km NE of Jones, Oklahoma 5.313 3 ml 2014-08-06T16:06:44.6902 36.581 -97 .606 27km SSE of Medford, Oklahoma 5 3 ml 2014-08-05T17:09:56.8902 36.818 -97.989 22km W of Medford, Oklahoma 4.2 3.3 ml 2014-08-04T18:23:01.5002 35.5977 -97.4066 8km SE of Edmond, Oklahoma 6.39 3.2 mwr 2014-08-04115:30:42.7602 35.815 -97.42 7km S of Guthrie, Oklahoma 3.7 3.3 mwr 2014-08-03117: 11:06.1002 35.614 -96.9408 11 km SSW of Chandler, Oklahoma 5.595 3.1 ml 2014-08-03112:21 :26.6002 35.8178 -97.4241 6km S of Guthrie, Oklahoma 3.775 3 ml 2014-08-03104:57:57.6002 35.772 -97.477 12km SSW of Guthrie, Oklahoma 6.7 3.2 ml 2014-08-02101 :44: 30 .4002 36.773 -98.069 25km E of Cherokee, Oklahoma 5.8 3.1 ml 2014-08-01T14:44:27.7002 36.7621 -98 .0439 27km E of Cherokee, Oklahoma 11.68 3.2 mwr 2014-08-01T14: 19:21.1002 36.7498 -98 .0449 27km E of Cherokee, Oklahoma 4.6 3.1 mwr 2014-07-31123:28:20.0002 36.5823 -97.6107 27km SSE of Medford, Oklahoma 5.287 3.2 ml 2014-07-31106:09:30. 7002 36.3006 -97.543 22km W of Perry, Oklahoma 4.996 3.2 ml 2014-07-30123:48:03.3002 35.7185 -97.432 8km NNE of Edmond, Oklahoma 5 3.2 ml 2014-07-30116:46:59.0802 35.718 -97.426 8km NNE of Edmond, Oklahoma 5 3.3 ml 2014-07-30116:21 :32.9402 35.719 -97.427 8km NNE of Edmond, Oklahoma 5.1 3.3 mwr 2014-07-29T02:46:36.0002 36.7561 -98 .0453 27km E of Cherokee, Oklahoma 5.287 4.3 mwr Facility Decommissioning Plan - Rev 2 February 2021 Page 44 of 56

Preparer: D. Horne; Date: 02/15/21 Table 2 Revision 2 Reviewer: E. Dulle; Date: 02/15/21 Historical Earthquakes in Oklahoma Greater than 3.0 Magnitude (As of February 9, 2021)

Date and Time Latitude Longitude Epicenter Depth (km) Magnitude Maa. Tvoe 1 2014-07-28T22:26:50.800Z 36.7469 -98.408 4km W of Cherokee, Oklahoma 4.76 3.3 ml 2014-07-28T15:08:04.220Z 36.747 -98.406 4km W of Cherokee, Oklahoma 4.2 3 ml 2014-07-27T22: 19:20.000Z 36 .144 -96 .809 10km WNW of Yale, Oklahoma 0.046 3.2 ml 2014-07-26T10:57: 10.970Z 37.1081 -97.7961 18km WNW of Caldwell, Kansas 3.12 3.4 mb lg 2014-07-25T04:56:51 .600Z 36.662 -98 .28 12km SSE of Cherokee, Oklahoma 0.7 3.4 mwr 2014-07-23T05:58: 13.200Z 35.8779 -97.3059 8km SSW of Langston, Oklahoma 4.988 3.1 ml 2014-07-23T02:02:26.400Z 35.8782 -97.3091 8km SSW of Langston, Oklahoma 5.264 3.3 mwr 2014-07-20T12:24:58.230Z 37.3394 -98.0905 8km NW of Harper, Kansas 6.15 3.3 mb lg 2014-07-20T00:24:58.390Z 37.2344 -97 .9489 8km SE of Harper, Kansas 5.58 3 mb lg 2014-07-18T13:41 : 13.000Z 36.675 -98.2098 15km SE of Cherokee, Oklahoma 5 3.3 ml 2014-07-18T01 :37:28.000Z 36 .121 -97.3193 18km S of Perry, Oklahoma 4.963 3 ml 2014-07-17T10:40:43.190Z 37.1223 -97 .7918 19km WNW of Caldwell, Kansas 5 3.6 mb lg 2014-07-15T10:47:53.900Z 36.7496 -97.7474 6km S of Medford, Oklahoma 4.844 3 ml 2014-07-15T09:08:40. 900Z 35.5243 -97.1588 3km N of Harrah, Oklahoma 6.653 3.9 mwr 2014-07-15T07: 19:17.300Z 35.524 -97.1543 3km NNE of Harrah, Oklahoma 6.546 3.5 mwr 2014-07-14T16:50: 14.400Z 35.8721 -97.3092 9km SSW of Langston, Oklahoma 5.117 3.3 mwr 2014-07-14T07: 15:51.100Z 36.713 -97.888 17km SW of Medford, Oklahoma 5 3.9 mwr 2014-07-13T14:51 :02.200Z 35.8588 -97.3237 9km ESE of Guthrie, Oklahoma 4.825 3 ml 2014-07-12T17:34:27.600Z 35.858 -97.3253 9km ESE of Guthrie, Oklahoma 4.997 3.1 ml 2014-07-12T17: 11 :46. 700Z 35 .8637 -97.321 9km E of Guthrie, Oklahoma 4.047 4 mwr 2014-07-12T11 :27:26.400Z 35.8628 -97 .3124 10km E of Guthrie, Oklahoma 5 3.2 ml 2014-07-11T12: 17:05.500Z 36.56 -97 .8367 18km NNE of Enid, Oklahoma 6.398 3.4 ml 2014-07-09T02: 10:04.440Z 37.1046 -97 .7864 17km WNW of Caldwell, Kansas 3.43 3 mwr 2014-07-07T14:38:21 .500Z 34.0713 -97.468 10km SSW of Wilson, Oklahoma 7.727 3.2 ml 2014-07-07T07:44: 13.900Z 36.6773 -98.2108 15km ESE of Cherokee, Oklahoma 3.615 3.2 ml 2014-07-07T06:53:06.300Z 36.7575 -98.0487 27km E of Cherokee, Oklahoma 6.034 3 ml 2014-07-06T15:22:05.600Z 36.7273 -97.893 16km WSW of Medford, Oklahoma 5 3.1 ml 2014-07-06T04: 10:46.1 00Z 36.7497 -97.7497 6km SSW of Medford, Oklahoma 4.821 3.3 ml 2014-07-06T01 :44: 18.700Z 36.2157 -97.5417 24km WSW of Perry, Oklahoma 4.925 3.3 ml 2014-07-04T20:48:01.900Z 36.7233 -97.9285 19km WSW of Medford, Oklahoma 5 3 ml 2014-07-04T04:55:09.700Z 36.894 -97 .3706 12km NW of Blackwell, Oklahoma 7.049 3.2 ml 2014-07-03T20:24:20.000Z 36.7602 -98.0515 27km E of Cherokee, Oklahoma 3.975 3 ml 2014-07-03T20: 14:54 .300Z 35.9358 -97.0745 5km SW of Perkins, Oklahoma 4.656 3.2 ml 2014-07-03T16:09:03.400Z 36.3842 -96.9309 12km WNW of Pawnee, Oklahoma 5 3 ml 2014-07-03T14:43:41 .600Z 36.7556 -98.0476 27km E of Cherokee, Oklahoma 5 3.1 ml 2014-07-01T14:22:07.200Z 36.5831 -97.8189 21 km NNE of Enid, Oklahoma 5 3.1 ml 2014-07-01 T08:20:34.500Z 36.6507 -97.9586 26km SW of Medford, Oklahoma 5 3.2 ml 2014-07-01 T07:42:52.800Z 35.8247 -97.0749 16km SSW of Perkins, Oklahoma 5.643 3 ml 2014-06-30T11 :03:51.600Z 35.8858 -97 .2658 6km S of Langston, Oklahoma 4.511 3.2 ml 2014-06-30T01 :30:44.300Z 36.8531 -97 .8543 11 km WNW of Medford, Oklahoma 4.476 3 ml 2014-06-29T16:29:47.700Z 35.5958 -97.4041 8km NNW of Spencer, Oklahoma 5.501 3 ml 2014-06-28T06:08:44.700Z 36.6833 -98.2613 11 km SE of Cherokee, Oklahoma 4.962 3 ml 2014-06-27T22:35:04.800Z 36.7186 -97.9033 18km WSW of Medford, Oklahoma 6.063 3.7 mwr 2014-06-27T20: 18:34.700Z 36.5649 -97.8371 19km N of Enid, Oklahoma 5 3.1 ml 2014-06-27T15:09:02 .800Z 35.8856 -97.3103 8km SW of Langston, Oklahoma 5 3.6 mwr 2014-06-27T12:36:57.600Z 35.8856 -97.3125 8km SW of Langston, Oklahoma 5.472 3.3 ml 2014-06-27T07: 10:46.200Z 35.8839 -97 .2608 6km S of Langston, Oklahoma 4.761 3.5 ml 2014-06-26T23:28:03.400Z 35.8863 -97 .2626 6km S of Langston, Oklahoma 5 3.7 mwr 2014-06-26T14:02:50.200Z 36.8682 -97 .6881 7km NNE of Medford, Oklahoma 1.593 3.2 mwr 2014-06-26T07:57: 16.200Z 36.7578 -98 .0499 27km E of Cherokee, Oklahoma 5.716 3 ml 2014-06-26T07:45:55.500Z 36.755 -98.0469 27km E of Cherokee, Oklahoma 5.768 3.2 ml 2014-06-26T06: 13:30.1 00Z 35.7749 -97.4912 12km SSW of Guthrie, Oklahoma 6.166 3.3 mwr 2014-06-26T05:41 :27.200Z 35.7674 -97.4762 12km N of Edmond, Oklahoma 6.414 3.1 ml 2014-06-26T05:38:57.1 00Z 35.7683 -97.4845 12km N of Edmond, Oklahoma 6.301 3.5 mwr 2014-06-26T05:26:44.900Z 35.7716 -97.491 13km N of Edmond, Oklahoma 6.584 3.6 mwr 2014-06-25T13:09:45.300Z 36.6384 -98 .1073 17km NE of Helena , Oklahoma 5.716 3.3 ml 2014-06-24T17:38: 10.300Z 36.871 -97 .694 7km NNE of Medford, Oklahoma 5 3 ml 2014-06-24T16:57:30.700Z 36.884 -97.3773 12km NW of Blackwell, Oklahoma 6.14 3.2 ml Facility Decommissioning Plan - Rev 2 February 2021 Page 45 of 56

Preparer: D. Horne; Date: 02/15/21 Table 2 Revision 2 Reviewer: E. Dulle; Date: 02/15/21 Historical Earthquakes in Oklahoma Greater than 3.0 Magnitude (As of February 9, 2021)

Date and Time Latitude Longitude Epicenter Depth (km) Magnitude Maa. Tvoe 1 2014-06-24T14: 15:56.400Z 36.5993 -97.6136 25km SSE of Medford, Oklahoma 5.574 3 ml 2014-06-23T13:44:59.400Z 36.8512 -97.856 11 km WNW of Medford, Oklahoma 5.627 3.4 mwr 2014-06-23T09:48:01.000Z 36.8534 -97.8595 12km WNW of Medford, Oklahoma 6.102 3.3 ml 2014-06-23T07:42:06.1 00Z 35 .7739 -97.4785 12km SSW of Guthrie, Oklahoma 5.386 3.2 ml 2014-06-21T01 :57:14.000Z 36.7197 -97.8843 16km SW of Medford, Oklahoma 5 3 ml 2014-06-20T23:10:55.900Z 36.7256 -97 .903 17km WSW of Medford , Oklahoma 5 3.9 mwr 2014-06-20T14:46: 18.500Z 35.975 -97.1779 7km ENE of Langston, Oklahoma 6.489 3.3 mwr 2014-06-20T12:46:48.200Z 35.5994 -97.4093 8km SE of Edmond, Oklahoma 4.67 3.1 ml 2014-06-18T19:44:41.600Z 35.9756 -97.1794 7km ENE of Langston, Oklahoma 5.627 3.2 ml 2014-06-18T19: 11 :33.000Z 36.723 -97.9006 17km WSW of Medford, Oklahoma 4.583 3.6 ml 2014-06-18T18:42:26.1 00Z 35.9772 -97.1898 Oklahoma 5 3.2 ml 2014-06-18T17:44:40.1 00Z 36.721 -97.8958 17km WSW of Medford, Oklahoma 4.087 3 ml 2014-06-18T17:26:33.200Z 35.9774 -97.1813 7km ENE of Langston, Oklahoma 5 3.1 ml 2014-06-18T14:08:33.800Z 35.9758 -97.1758 7km ENE of Langston, Oklahoma 5.964 3.2 mwr 2014-06-18T10:53:02.400Z 35.5956 -97.3924 8km N of Spencer, Oklahoma 5 4.1 mwr 2014-06-18T10:30:18.?00Z 35 .5974 -97.4001 8km NNW of Spencer, Oklahoma 5.315 3 ml 2014-06-18T07:08:01 .300Z 35.9772 -97 .1835 7km ENE of Langston, Oklahoma 5.569 3.4 ml 2014-06-17T16:29: 12.600Z 35.5908 -97 .374 7km N of Spencer, Oklahoma 5.053 3 ml 2014-06-16T11 :25:12 .?00Z 35.5866 -97.3804 7km N of Spencer, Oklahoma 6.536 3.3 ml 2014-06-16T10:47:35.600Z 35.5935 -97.3969 8km NNW of Spencer, Oklahoma 5 4 .3 mwr 2014-06-16T10:31 :07.400Z 35.5925 -97.4027 8km NNW of Spencer, Oklahoma 6.67 3.5 mwr 2014-06-15T17:33:01.600Z 36.8326 -97.6391 8km ENE of Medford, Oklahoma 1.891 3 ml 2014-06-15T13:51 :25.900Z 36.8663 -97.8567 12km WNW of Medford, Oklahoma 5.259 3 ml 2014-06-14T22:55:07 .900Z 36.6037 -97 .6234 24km SSE of Medford, Oklahoma 5 3.3 ml 2014-06-11T09:42:29.600Z 36.9293 -97.6495 12km SSW of Caldwell, Kansas 9.121 3 ml 2014-06-1OT15:13:51.000Z 35.7155 -97.4288 8km NNE of Edmond, Oklahoma 5.322 3.1 ml 2014-06-1 OTO? :19:55.000Z 35.7168 -97.4282 8km NNE of Edmond, Oklahoma 5 3.1 ml 2014-06-02T23:08:02.900Z 35.7188 -97.4244 8km NNE of Edmond, Oklahoma 5.301 3.1 ml 2014-06-02T22:35:20.900Z 35.7182 -97.4267 8km NNE of Edmond, Oklahoma 5.262 3.2 ml 2014-06-02T17:38:54.?00Z 35.4943 -97.2576 1km ESE of Choctaw, Oklahoma 5.97 3.2 ml 2014-06-01T19:54: 18.300Z 35.5032 -97 .2361 3km ENE of Choctaw, Oklahoma 5 3.6 mwr 2014-06-01 T05:50:09 .100Z 35.4185 -96 .5057 8km SSW of Boley, Oklahoma 5 3.1 ml 2014-05-31T10:18:06.400Z 35.4929 -97.2515 1km ESE of Choctaw, Oklahoma 7.087 3.7 mwr 2014-05-30T22:44:56.700Z 36.4797 -97.9665 12km NW of Enid, Oklahoma 4.487 3.1 ml 2014-05-30T21 :42:02.200Z 36.6009 -98.3799 11 km WNW of Helena, Oklahoma 6.447 3.3 mwr 2014-05-30T14:32: 16.1 00Z 36.8131 -97 .7597 2km WNW of Medford, Oklahoma 3.187 3.4 ml 2014-05-25T09:10:34.900Z 36.7981 -97 .6673 6km E of Medford, Oklahoma 5 3 ml 2014-05-22T02:46: 10.300Z 35.7777 -97.4679 11 km SSW of Guthrie, Oklahoma 5.755 3.5 mwr 2014-05-21T23: 19:07.740Z 35.9048 -97.2834 5km SSW of Langston, Oklahoma 7.35 3 mb lg 2014-05-20T13:59:28.200Z 35.4984 -97.2409 2km E of Choctaw, Oklahoma 6.884 3.1 ml 2014-05-20T07:30: 18.800Z 35.4902 -97 .2458 2km ESE of Choctaw, Oklahoma 7.482 3.4 mwr 2014-05-20T05:42:38.600Z 35.4815 -97.2476 2km SE of Choctaw, Oklahoma 7.552 3.3 ml 2014-05-20T03:58:31.900Z 35.4855 -97 .2545 1km SE of Choctaw, Oklahoma 7.538 3.2 ml 2014-05-19T06:29:08.400Z 36.0915 -97 .0687 2km SSW of Stillwater, Oklahoma 4.02 3 ml 2014-05-19T04: 16:03.600Z 36.1096 -97.445 22km NE of Crescent, Oklahoma 6.299 3.2 ml 2014-05-18T18:53:47.000Z 36.5923 -97.7994 22km NNE of Enid, Oklahoma 5 3 ml 2014-05-18T08:29:25.800Z 35.808 -96.9371 12km NNW of Chandler, Oklahoma 5 3.2 ml 2014-05-17T20:54:31.400Z 36.0946 -97 .0702 2km SSW of Stillwater, Oklahoma 2.555 3.2 ml 2014-05-17T10:47:05.300Z 36.2794 -97.2612 2km ESE of Perry, Oklahoma 5 3.1 ml 2014-05-16T20:00:00.700Z 36.161 -96.8595 15km WNW of Yale, Oklahoma 8.104 3.1 ml 2014-05-16T03:35:07.000Z 34.429 -96.3119 14km SW of Coalgate, Oklahoma 5 3 ml 2014-05-15T20:23:21.300Z 35.7762 -97.4786 12km SSW of Guthrie, Oklahoma 6.907 3.4 mwr 2014-05-15T00:28:52.700Z 36.7981 -97.6599 7km ESE of Medford, Oklahoma 3.415 3.3 ml 2014-05-14T16:06:26.300Z 36.8762 -97 .6651 9km NE of Medford, Oklahoma 5 3.1 ml 2014-05-13T21 :39: 11.?00Z 36.1386 -96.8939 15km E of Stillwater, Oklahoma 5 3.3 ml 2014-05-12TO0: 13:03.600Z 36.309 -96 .6745 8km S of Pawnee, Oklahoma 5.42 3 ml 2014-05-11T19:29:34.500Z 36.9073 -97.6624 12km NNE of Medford, Oklahoma 5 3 ml 2014-05-11T07:50:50.400Z 36.5831 -97.6101 27km SSE of Medford, Oklahoma 5.834 3 ml Facility Decommissioning Plan - Rev 2 February 2021 Page 46 of 56

Preparer: D. Horne; Date: 02/15/21 Table 2 Revision 2 Reviewer: E. Dulle; Date: 02/15/21 Historical Earthquakes in Oklahoma Greater than 3.0 Magnitude (As of February 9, 2021) 1 Date and Time Latitude Longitude Epicenter Depth (km) Magnitude MaQ. Tvoe 2014-05-09T18:52:47.000Z 36.5833 -97 .618 26km SSE of Medford, Oklahoma 3.998 3.9 mwr 2014-05-08T20:40:32.800Z 36.5773 -97.6271 27km SSE of Medford, Oklahoma 5 3.5 mwr 2014-05-08T15:08:57.000Z 36.4531 -97.0432 24km WNW of Pawnee, Oklahoma 4.768 3 ml 2014-05-08T04: 32: 45. 300Z 36.6307 -97.828 21 km SSW of Medford, Oklahoma 5.017 3.2 ml 2014-05-07T18:57:02.700Z 36.3905 -97.1517 16km NE of Perry, Oklahoma 2.49 3.2 ml 2014-05-06T06:08: 10.400Z 35.9039 -97.2645 4km S of Langston , Oklahoma 4.776 3.2 ml 2014-05-03T09:39:07.700Z 36.6039 -97 .8367 23km N of Enid, Oklahoma 5 3.6 ml 2014-05-02T19:44:20.500Z 35.5903 -97.3994 7km NNW of Spencer, Oklahoma 5.534 3.2 mwr 2014-05-02T10:29:20.400Z 35.876 -97 .2988 8km SSW of Langston, Oklahoma 6.351 3 ml 2014-05-02T05:46:03.200Z 36.0768 -97 .5536 14km NNE of Crescent, Oklahoma 4.67 3.2 ml 2014-05-01T19:07:30.500Z 36.2757 -97 .2521 3km ESE of Perry, Oklahoma 4.131 3.1 ml 2014-05-01T10:04:07.900Z 35.8112 -96 .9361 13km NNW of Chandler, Oklahoma 4.433 3.4 mwr 2014-04-30T21 :26:00.1 00Z 36.0656 -97 .0474 5km S of Stillwater, Oklahoma 1.117 3.1 ml 2014-04-30T19:46:10.700Z 36.5971 -97 .6807 23km SSE of Medford, Oklahoma 5.613 3.4 ml 2014-04-30T08:06:52.200Z 36.7764 -98.073 25km E of Cherokee, Oklahoma 4.476 3 ml 2014-04-30T07 :48: 08. 600Z 36.6037 -97 .8342 23km N of Enid, Oklahoma 6.092 3.1 ml 2014-04-28T02:26:40.600Z 36.1057 -97.0443 1km SE of Stillwater, Oklahoma 7.036 3.2 ml 2014-04-27T00:22:29.000Z 36.0752 -97.5579 14km NNE of Crescent, Oklahoma 4.633 3 ml 2014-04-25T23:54:44.800Z 36.1521 -97 .2949 15km S of Perry, Oklahoma 3.073 3 ml 2014-04-25T07:38:49.600Z 36.5989 -97 .8271 23km NNE of Enid, Oklahoma 6.478 3.2 ml 2014-04-24T17:46: 19.000Z 36.7676 -98.715 6km SW of Alva , Oklahoma 5 3.2 ml 2014-04-23T15:35:33.300Z 36.7133 -98 .5923 12km SSE of Alva, Oklahoma 7.962 3.1 ml 2014-04-22T09:57:07.000Z 35.5935 -97.3795 7km N of Spencer, Oklahoma 5.913 3.3 ml 2014-04-21T18: 16:08. 700Z 36.6033 -97.8421 23km N of Enid, Oklahoma 5.822 3.2 ml 2014-04-20T19:31 :32.200Z 35.7724 -97.4718 12km SSW of Guthrie, Oklahoma 7.193 3.3 ml 2014-04-20T19:13:41.500Z 35.7717 -97.4829 12km SSW of Guthrie, Oklahoma 5.846 3 ml 2014-04-20T19:07: 13.100Z 35.774 -97.4821 12km SSW of Guthrie, Oklahoma 6.717 3.7 mwr 2014-04-19T10:43: 10.300Z 36.2777 -97.2517 3km ESE of Perry, Oklahoma 4.157 3.8 mwr 2014-04-17T11 :50:07.600Z 36.6797 -98.217 14km ESE of Cherokee, Oklahoma 3.008 3.6 ml 2014-04-14T13: 17:58.600Z 35.7751 -97.4839 12km SSW of Guthrie, Oklahoma 7.45 3.1 ml 2014-04-13T20:02:21 .1O0Z 35.7712 -97.4831 13km N of Edmond, Oklahoma 5.896 3.5 ml 2014-04-13T17:00: 15.500Z 35.7698 -97.4793 12km N of Edmond, Oklahoma 5.737 3.4 ml 2014-04-12T16:13:15.800Z 35.8899 -97.2681 6km S of Langston, Oklahoma 3.075 3.3 ml 2014-04-12T05:32 :52.200Z 36.274 -97.2478 4km ESE of Perry, Oklahoma 5 3.6 mwr 2014-04-12T02:53:38.300Z 35.7673 -97.4814 12km N of Edmond, Oklahoma 5.251 3 ml 2014-04-11 T05: 17:50.900Z 35.8922 -97.2738 6km SSW of Langston , Oklahoma 5.105 3 ml 2014-04-1OT18: 18:44.1 00Z 36.2889 -96.9539 14km WSW of Pawnee, Oklahoma 8.621 3.1 ml 2014-04-1OT18:00:48.000Z 36.2894 -96.952 14km WSW of Pawnee, Oklahoma 8.204 3.7 ml 2014-04-1OT16:53:47 .300Z 36.2888 -96.951 14km WSW of Pawnee, Oklahoma 7.988 3.1 ml 2014-04-1 0T08:20:41.400Z 35.7809 -97.4845 12km SSW of Guthrie, Oklahoma 5 3.5 ml 2014-04-1 0T08: 19:43.700Z 35.7689 -97.4827 12km N of Edmond, Oklahoma 5.537 3.4 mwr 2014-04-1 0T07:35:40.500Z 35 .7772 -97.4827 12km SSW of Guthrie, Oklahoma 6.837 3.2 ml 2014-04-1 0T07:33 :57.100Z 35 .7745 -97.4826 12km SSW of Guthrie, Oklahoma 7.04 4 mwr 2014-04-1 0T04:48: 14.200Z 36 .3944 -97 .1483 17km NE of Perry, Oklahoma 5.282 3.2 ml 2014-04-09T21 :09:30.500Z 35.3745 -96 .638 13km SSE of Prague, Oklahoma 6.033 3.2 ml 2014-04-09T17:27:50.400Z 35.7766 -97.483 12km SSW of Guthrie, Oklahoma 6.832 3 ml 2014-04-09T03: 36: 06.900Z 35.8937 -97.2926 6km SSW of Langston, Oklahoma 4.667 3.2 ml 2014-04-07T18:01 :42. 000Z 35.8927 -97.2932 6km SSW of Langston, Oklahoma 5.316 3.1 ml 2014-04-07T16:03:03.900Z 35.8913 -97.2752 6km SSW of Langston, Oklahoma 5.131 4.2 mwr 2014-04-07T05:59:34.800Z 36.2853 -96.9806 16km WSW of Pawnee, Oklahoma 4.134 3 ml 2014-04-07T03:25:34.000Z 36.8409 -98.2775 11 km NE of Cherokee, Oklahoma 5 3.4 mwr 2014-04-07T01 :0 1:03.200Z 35.8893 -97.2706 6km SSW of Langston, Oklahoma 5 3.1 ml 2014-04-06T14:58:54.900Z 35.8902 -97.2691 6km SSW of Langston, Oklahoma 5 3.8 mwr 2014-04-06T14:25:09.800Z 35 .8928 -97 .2676 5km S of Langston, Oklahoma 5 3 ml 2014-04-05T 12 :42:16. 900Z 36.1312 -97.6308 20km N of Crescent, Oklahoma 2.174 3.8 mwr 2014-04-05T10:54:55.800Z 36.0788 -97.5462 14km NNE of Crescent, Oklahoma 3.877 3 ml 2014-04-04T18:54: 18.800Z 35 .8887 -97.2837 6km SSW of Langston, Oklahoma 5 3.1 mwr 2014-04-04T06:42:34.500Z 35.8949 -97.268 5km SSW of Langston, Oklahoma 4.176 3 ml Facility Decommissioning Plan - Rev 2 February 2021 Page 47 of 56

Preparer: D. Horne; Date: 02/15/21 Table 2 Revision 2 Reviewer: E. Dulle; Date: 02/15/21 Historical Earthquakes in Oklahoma Greater than 3.0 Magnitude (As of February 9, 2021)

Date and Time Latitude Longitude Epicenter Depth (km) Magnitude Maa. Tvoe 1 2014-04-04103: 15:41.8002 35.8913 -97.2734 6km SSW of Langston, Oklahoma 5 3.1 ml 2014-04-04102:23:47. 700Z 35.8941 -97.2682 5km SSW of Langston, Oklahoma 5.22 3.5 ml 2014-04-03T20:58:39.500Z 36.6805 -98.2169 14km ESE of Cherokee, Oklahoma 5 3.1 ml 2014-04-03120:33: 11 .900Z 36.4478 -97 .0683 25km S of McCord, Oklahoma 5 3.1 ml 2014-04-03116:56:50.5002 35.8905 -97.2703 6km SSW of Langston, Oklahoma 4.797 3.3 ml 2014-04-02107: 10:02.200Z 35.495 -97.2503 1km E of Choctaw, Oklahoma 7.176 3 ml 2014-04-02100:56:25. 900Z 36.6221 -97.6348 22km SSE of Medford, Oklahoma 5 3.3 ml 2014-04-01T17:07: 13. 700Z 35.8842 -97 .285 7km SSW of Langston, Oklahoma 5 3.2 ml 2014-04-01 T07:07:43 .220Z 35.8993 -97.2614 5km S of Langston, Oklahoma 6.38 3 mb lg 2014-03-31 T23:59:47.800Z 35.887 -97 .2621 6km S of Langston, Oklahoma 5 3 ml 2014-03-31T17:17:59.4702 35.794 -96 .978 13km NW of Chandler, Oklahoma 3.4 3.2 ml 2014-03-30114:09:59.4002 36.1255 -97 .6398 19km NNW of Crescent, Oklahoma 3.903 4.1 mwr 2014-03-30112:49:42.000Z 36.13 -97 .6359 20km N of Crescent, Oklahoma 5 3.4 ml 2014-03-30l08:42:36.400Z 36.1352 -97.6257 20km N of Crescent, Oklahoma 2.483 3.9 mwr 2014-03-30108:10:31 .800Z 36.1317 -97 .628 20km N of Crescent, Oklahoma 2.277 3.3 mwr 2014-03-30l08:07:05.200Z 36.1371 -97.624 20km N of Crescent, Oklahoma 2.535 3.3 mwr 2014-03-30l06:59:28.400Z 36.125 -97.644 19km NNW of Crescent, Oklahoma 5 3.3 ml 2014-03-30106:51 :56.300Z 36.1309 -97 .6291 20km N of Crescent, Oklahoma 4.831 4.2 mwr 2014-03-30106:37:43.700Z 36.1288 -97.6404 19km NNW of Crescent, Oklahoma 4.656 3.3 ml 2014-03-30l05:49:29.400Z 35.4911 -97.2465 2km ESE of Choctaw, Oklahoma 7.509 3 ml 2014-03-30l03:55:33.500Z 36.1288 -97 .6438 20km NNW of Crescent, Oklahoma 5 3.5 mwr 2014-03-30l03:08:30.800Z 35.4923 -97 .2471 2km ESE of Choctaw, Oklahoma 7.403 3.4 mwr 2014-03-29106: 11 : 18. 900Z 35.4906 -97 .2415 2km ESE of Choctaw, Oklahoma 7.049 3.1 ml 2014-03-28123: 16:24.3002 36.1673 -96 .9819 8km NE of Stillwater, Oklahoma 6.983 3.2 ml 2014-03-28117:56: 11.20oz 36.1257 -97.6329 19km N of Crescent, Oklahoma 0.393 3.1 ml 2014-03-27120:05: 16.600Z 35.897 -97.286 6km SSW of Langston, Oklahoma 4.6 3.2 ml 2014-03-25114:01: 19.1ooz 35.7427 -97.5558 12km NW of Edmond, Oklahoma 6.016 3 mwr 2014-03-24123:32:46. 700Z 35.7693 -96 .6517 2km NNE of Stroud, Oklahoma 5.761 3 ml 2014-03-22119:42:12.21 oz 36.8124 -97.5915 12km E of Medford, Oklahoma 4.1 3.3 ml 2014-03-22119: 15:54.4002 36.638 -97 .661 19km SSE of Medford, Oklahoma 5 3 ml 2014-03-22110:24:25.6802 37.0752 -97.8436 18km ESE of Anthony, Kansas 6.54 3 mb lg 2014-03-22103:05:58.31 oz 35.888 -97.299 7km SSW of Langston, Oklahoma 4.5 3.9 mwr 2014-03-22l03:02:35.480Z 35.888 -97 .29 7km SSW of Langston, Oklahoma 4.5 3.1 ml 2014-03-22103:01 :32.160Z 35.892 -97.279 6km SSW of Langston, Oklahoma 5 3 ml 2014-03-22l02:30:33.900Z 35.896 -97.27 5km SSW of Langston, Oklahoma 4.5 3.1 ml 2014-03-21T17:30:16.7302 37.0895 -97.8455 17km ESE of Anthony, Kansas 10.95 3 mb lg 2014-03-21109:05:46.1 00Z 36.0796 -97.5493 14km NNE of Crescent, Oklahoma 4.296 3 ml 2014-03-20l22:42:32.200Z 36.5675 -97.8247 19km NNE of Enid, Oklahoma 3.66 3.3 ml 2014-03-20114:39: 17.800Z 35.891 -97.275 6km SSW of Langston, Oklahoma 5 3.3 ml 2014-03-20105: 12:23.8002 36.6376 -97.6716 19km SSE of Medford, Oklahoma 6.715 3.1 ml 2014-03-19120:15:32.000Z 35.949 -96.918 10km ESE of Perkins, Oklahoma 1.6 3.4 mwr 2014-03-19111 :23:14.200Z 36.079 -97.5501 14km NNE of Crescent, Oklahoma 3.7 3.1 ml 2014-03-19108: 54: 30. oooz 36.0765 -97.5495 14km NNE of Crescent, Oklahoma 4.258 3.1 ml 2014-03-19l08:28:31 .130Z 36.6079 -97 .652 23km SSE of Medford, Oklahoma 5 3.1 mb lg 2014-03-17123:38:19.1 ooz 36.0799 -97.5474 14km NNE of Crescent, Oklahoma 4.023 3 ml 2014-03-17118:45:55.2602 35.893 -97.275 6km SSW of Langston, Oklahoma 5.1 3.1 ml 2014-03-17l08:13:38.040Z 35.496 -97 .307 1km ENE of Nicoma Park, Oklahoma 7.01 3.4 ml 2014-03-16l08:46:20.180Z 37.1918 -97.8992 12km ENE of Anthony, Kansas 3.08 3.7 mwr 2014-03-15119:27:05.1602 36.632 -97.669 20km SSE of Medford, Oklahoma 5 3 ml 2014-03-14102: 22: 14. 440Z 36.02 -97 .11 8km NW of Perkins, Oklahoma 4.4 3.1 ml 2014-03-12119:35:26.4602 37.1783 -97.8728 14km E of Anthony, Kansas 5 3.2 mb lg 2014-03-12109:50:25.1ooz 37.1966 -97 .8858 13km ENE of Anthony, Kansas 3.1 3.3 mb lg 2014-03-11T12:55:27.71 oz 35.89 -97.282 6km SSW of Langston, Oklahoma 4.89 3.4 mwr 2014-03-10114: 11 :20.200Z 36.1251 -96 .9075 13km E of Stillwater, Oklahoma 4.334 3.5 ml 2014-03-09117:05:54.000Z 35.4919 -97 .2474 2km ESE of Choctaw, Oklahoma 7.29 3 ml 2014-03-08121 :50:55.000Z 35.796 -96.976 13km NW of Chandler, Oklahoma 5 3.3 ml 2014-03-08101 :34:12.920Z 35.89 -97.281 6km SSW of Langston, Oklahoma 5 3.1 ml 2014-03-08101 :29:04.480Z 35.889 -97 .284 6km SSW of Langston, Oklahoma 4.7 3 ml Facility Decommissioning Plan - Rev 2 February 2021 Page 48 of 56

Preparer: D. Horne; Date: 02/15/21 Table 2 Revision 2 Reviewer: E. Dulle; Date: 02/15/21 Historical Earthquakes in Oklahoma Greater than 3.0 Magnitude (As of February 9, 2021)

Date and Time Latitude Longitude Epicenter Depth (km) Magnitude Maa. Tvoe 1 2014-03-05114:17:06.3902 35.593 -97.383 7km N of Spencer, Oklahoma 6.4 3.3 mwr 2014-03-02114:55:46.9002 36.5442 -97.0499 14km S of McCord, Oklahoma 3 3 ml 2014-03-02104:21 :46.1 ooz 35.636 -97.041 14km ESE of Luther, Oklahoma 4.4 3.5 ml 2014-02-27110:14:01.000Z 36.5438 -97.0616 15km S of McCord, Oklahoma 7.75 3.4 ml 2014-02-27100:19: 10.00oz 36.4476 -97.0735 25km S of McCord, Oklahoma 0.001 3.2 ml 2014-02-26119:44:37.000Z 36.5906 -97.8097 22km NNE of Enid , Oklahoma 5 3 ml 2014-02-26119:30:33.000Z 36.675 -97.693 15km SSE of Medford , Oklahoma 5 3.4 ml 2014-02-26118: 18:02.000Z 36.5865 -97.8125 21 km NNE of Enid, Oklahoma 5.172 3 ml 2014-02-24116:44:59.4402 35.817 -96.943 13km NNW of Chandler, Oklahoma 4.3 3.2 ml 2014-02-24100:11 :32.520Z 36.171 -96 .9786 9km NE of Stillwater, Oklahoma 5 3.1 ml 2014-02-23l09 :15:41.110Z 36.036 -97.341 12km NW of Langston, Oklahoma 5 3.3 mwr 2014-02-23107 :23: 32. 700Z 36.0353 -97.3362 12km NW of Langston, Oklahoma 5 3 ml 2014-02-23l04:44:35.800Z 36.175 -96.981 9km NE of Stillwater, Oklahoma 5 3.2 ml 2014-02-23103:11 :38.800Z 36.103 -97.081 2km SW of Stillwater, Oklahoma 5 3 ml 2014-02-21121 :38:49.6502 35.781 -97.4745 11 km SSW of Guthrie, Oklahoma 5.17 3.1 ml 2014-02-21114:26: 12.000Z 36.8695 -97.8886 15km WNW of Medford, Oklahoma 5 3.2 ml 2014-02-19116:44:56.9802 35.777 -97.466 11 km SSW of Guthrie, Oklahoma 6.1 3.1 ml 2014-02-18112 :16:44.0202 35.77 -97.459 12km SSW of Guthrie, Oklahoma 5.14 3.2 ml 2014-02-18111 :53:51.1402 35.777 -97.467 11 km SSW of Guthrie, Oklahoma 5.03 3.4 ml 2014-02-17114:19: 13.770Z 35 .775 -97.475 12km SSW of Guthrie, Oklahoma 4.4 3 ml 2014-02-17112:57:39.000Z 35.772 -97.463 12km SSW of Guthrie, Oklahoma 5 3.1 ml 2014-02-17105:02: 11.780Z 35.777 -97.466 11 km SSW of Guthrie, Oklahoma 5.39 3.2 ml 2014-02-17T04:54:59.000Z 35.776 -97.469 12km SSW of Guthrie, Oklahoma 7.4 3.8 mwr 2014-02-16101 :51 :47.800Z 35.781 -97.477 11 km SSW of Guthrie, Oklahoma 5 3.3 ml 2014-02-15l23:20:46.200Z 37.2918 -97.6446 10km S of Conway Springs, Kansas 5 3.1 mb lg 2014-02-15100: 19: 12.990Z 35.7818 -97.4807 11 km SSW of Guthrie, Oklahoma 5 3.1 ml 2014-02-14120:46: 15.500Z 35.7756 -97.4693 12km SSW of Guthrie, Oklahoma 5 3 ml 2014-02-12112:41 :37.000Z 36.9963 -97.9271 19km SSE of Anthony, Kansas 10.42 3.4 ml 2014-02-11T08:49:21.400Z 36.1265 -97.2952 18km S of Perry, Oklahoma 7.78 3 ml 2014-02-11T03:19:54.040Z 36.8657 -97.7345 6km N of Medford, Oklahoma 5 3 ml 2014-02-10123:37:39.000Z 35.8162 -96.9324 13km NNW of Chandler, Oklahoma 5 3.5 mwr 2014-02-09102 :16:02.000Z 35.893 -97.292 6km SSW of Langston, Oklahoma 5 4.1 mwr 2014-02-06112:48:08.6302 36.7464 -98.2949 5km E of Cherokee, Oklahoma 4.45 3.3 ml 2014-02-05123: 15:40.000Z 36.8361 -97.7503 3km NNW of Medford, Oklahoma 10.649 3.5 ml 2014-02-04115:59:51.2702 36.1286 -97.3101 17km S of Perry, Oklahoma 5 3 ml 2014-02-04114:08: 17.140Z 37 .1428 -97 .7874 20km NW of Caldwell, Kansas 5 3.3 mb lg 2014-02-03l09:03:21.580Z 37.132 -97.7684 18km NW of Caldwell, Kansas 5 3.6 mwr 2014-02-01 l09:08:02.300Z 35.9505 -96.9074 11 km ESE of Perkins, Oklahoma 5 3.6 mwr 2014-01-31115:52:56.5702 36.6532 -98.2081 13km NNE of Helena, Oklahoma 8.82 3.1 ml 2014-01-30T04:50:30.580Z 35.947 -96.9153 11 km ESE of Perkins, Oklahoma 5.77 3.2 ml 2014-01-29l02:24:06.740Z 35.943 -96.908 11 km ESE of Perkins, Oklahoma 5 3.2 ml 2014-01-29102:07: 14.740Z 35.9446 -96.9111 11 km ESE of Perkins, Oklahoma 5 3 ml 2014-01-28115:05:01.5902 35.6 -97 .389 8km N of Spencer, Oklahoma 5.5 3 ml 2014-01-26106:38: 18.200Z 35.1097 -96.1792 15km SSE of Wetumka , Oklahoma 2.54 3.1 ml 2014-01-09l23:07:37.170Z 35.8184 -96.9338 13km NNW of Chandler, Oklahoma 2.66 3 ml 2014-01-09l03:26:53.060Z 35.5421 -96 .773 10km NW of Prague, Oklahoma 3.21 3.8 ml 2014-01-04123:33:32.000Z 36.129 -97.322 18km S of Perry, Oklahoma 5 3.7 mb lg 2014-01-04121 :26: 17.000Z 35.819 -96.94 14km NNW of Chandler, Oklahoma 5 3.2 mb lg 2014-01-04120:35:30.1ooz 36.8398 -98.3576 9km N of Cherokee, Oklahoma 2.988 3.5 mb lg 2014-01-04105:27:24. 900Z 35.557 -97.234 4km ESE of Jones, Oklahoma 5.1 3 ml 2014-01-02117:20:26.8502 36.127 -96.895 14km E of Stillwater, Oklahoma 4.4 3.2 ml 2014-01-02113: 19:32.000Z 36.1226 -97.3227 18km S of Perry, Oklahoma 5 3.1 ml 2013-12-29108: 14:36.5002 35.8914 -97.2966 7km SSW of Langston, Oklahoma 5 3.7 mwr 2013-12-29102:41 :02.400Z 36 .958 -97.67 9km SW of Caldwell , Kansas 5.2 3.6 mwr 2013-12-28114:26:52.3002 36.1404 -97.3219 16km S of Perry, Oklahoma 5 3.3 ml 2013-12-27122:19:37.1 ooz 35.6835 -97 .3826 9km ENE of Edmond, Oklahoma 3.553 3.1 ml 2013-12-25110:30:37.6002 35.6012 -97 .3837 8km N of Spencer, Oklahoma 5.95 3 ml 2013-12-25T03:08:17.11 oz 35.6818 -97.3931 8km ENE of Edmond, Oklahoma 5 3.7 mb lg Facility Decommissioning Plan - Rev 2 February 2021 Page 49 of 56

Preparer: D. Horne; Date: 02/15/21 Table 2 Revision 2 Reviewer: E. Dulle; Date: 02/15/21 Historical Earthquakes in Oklahoma Greater than 3.0 Magnitude (As of February 9, 2021)

Date and Time Latitude Longitude Epicenter Depth (km) Magnitude Maa. Tvoe 1 2013-12-22116:28:29.1902 36.469 -97 .047 23km S of McCord, Oklahoma 5 3.2 ml 2013-12-17113:23:39.6402 35.4 -96.648 10km SSE of Prague, Oklahoma 3.3 3.4 ml 2013-12-16115:09:53.9002 37.1297 -97.7758 18km NW of Caldwell, Kansas 5 3.8 mwr 2013-12-08106:27:32.9802 35.6045 -97.3971 9km SE of Edmond, Oklahoma 6.18 3.3 ml 2013-12-07123:58: 18.6702 35.6077 -97.399 8km SE of Edmond, Oklahoma 6.73 3.2 ml 2013-12-07119:26:30.1 ooz 35.6089 -97.3975 8km SE of Edmond, Oklahoma 6.431 3 ml 2013-12-07118: 10:24.5902 35.6073 -97.3863 9km ESE of Edmond, Oklahoma 8.44 4.5 mwr 2013-12-06T00:37:13.850Z 36.8747 -97.9889 23km WNW of Medford, Oklahoma 5 3.1 ml 2013-12-02107:21 :52.6202 35.611 -97 .378 9km N of Spencer, Oklahoma 9.01 3.1 ml 2013-12-02107:10:54.51 oz 35.611 -97.379 9km N of Spencer, Oklahoma 8.66 3.2 ml 2013-11-30121 :13:39.000Z 35.8934 -97 .2957 6km SSW of Langston, Oklahoma 5 3 ml 2013-11-27107:36:25.6102 36.5849 -97.8446 21 km N of Enid, Oklahoma 5.26 3 ml 2013-11-26121 :43:55.4402 35.602 -97.378 8km N of Spencer, Oklahoma 6.6 3 ml 2013-11-22114:33:58.5002 36.1792 -96.9537 11 km NE of Stillwater, Oklahoma 3.11 3.6 ml 2013-11-18108:37:41.9002 36.183 -96 .958 11 km NE of Stillwater, Oklahoma 5 3.2 ml 2013-11-15l00:17:32.160Z 35.5898 -97.3808 7km N of Spencer, Oklahoma 5.21 3 mb lg 2013-11-12l23:04:00.700Z 35.388 -96.656 11 km SSE of Prague, Oklahoma 2.1 3.2 ml 2013-11 -12l04:00:58.590Z 36.5875 -97.8382 21 km N of Enid, Oklahoma 5.76 3.4 mb lg 2013-11-11121: 15:06.0602 35.7156 -97.4383 7km NNE of Edmond, Oklahoma 5 3.3 ml 2013-11-11111 :07:08.6002 35.721 -97.4311 8km NNE of Edmond, Oklahoma 5 3.2 ml 2013-11-1 0T23:25:00.270Z 35.722 -97.4302 8km NNE of Edmond, Oklahoma 5.03 3.5 ml 2013-11-08T05:52:59.400Z 35.5919 -97 .3874 7km N of Spencer, Oklahoma 5 3.3 ml 2013-11-08l05:50:05.500Z 35.5911 -97.3809 7km N of Spencer, Oklahoma 5 3.3 ml 2013-11-05T08:32:48.270Z 35.5873 -97.4172 8km NNW of Spencer, Oklahoma 5 3.2 mb lg 2013-11-05T04:01 :34.690Z 35.6038 -97.3715 8km N of Spencer, Oklahoma 5 3.8 mwr 2013-11-04T01 :52:02.020Z 35.599 -97.3863 8km N of Spencer, Oklahoma 5.821 3.3 mb lg 2013-11-02115:30:26.500Z 35.5948 -97.3899 8km N of Spencer, Oklahoma 5 3 ml 2013-11-02114: 19:01.700Z 35 .611 -97.361 8km NW of Jones, Oklahoma 5 3.4 mwr 2013-11-02l12:04:14.300Z 35.598 -97 .378 8km N of Spencer, Oklahoma 5.77 3.2 ml 2013-11-02T09:36:45.200Z 35.598 -97.367 8km N of Spencer, Oklahoma 5 3.5 mwr 2013-10-26T03:04:22.21 oz 36.5133 -97 .8752 13km N of Enid, Oklahoma 4.94 3 ml 2013-10-20109: 17:47.370Z 36.648 -97.829 19km SSW of Medford, Oklahoma 5 3.1 ml 2013-10-12l03:25:23.590Z 34.086 -96 .579 16km NE of Kingston, Oklahoma 5 3 ml 2013-10-08110:48:21.300Z 36.726 -98 .006 25km WSW of Medford, Oklahoma 3.43 3.2 ml 2013-10-05T07:11 :49.600Z 36.58 -97 .8159 21 km NNE of Enid, Oklahoma 5.12 3.3 ml 2013-10-02T00:38:52 .21 oz 36.594 -97.831 22km N of Enid , Oklahoma 4.2 3.5 ml 2013-10-01123:28:41.950Z 36.593 -97 .836 22km N of Enid, Oklahoma 5 3.1 ml 2013-10-01119:26:15.460Z 36.592 -97 .837 22km N of Enid, Oklahoma 5 3.2 ml 2013-09-26105: 17: 12.1 ooz 35.5896 -97.3751 7km N of Spencer, Oklahoma 6.07 3.2 ml 2013-09-23113:56:25.540Z 33.946 -97.161 4km WNW of Marietta, Oklahoma 5 3.4 ml 2013-09-23111 :40:40.000Z 33.9544 -97.1107 2km NNE of Marietta, Oklahoma 8.933 3.2 ml 2013-09-15T05:58: 13.900Z 35.4085 -96.5427 10km SSW of Boley, Oklahoma 4.88 3.1 ml 2013-08-1 0l08:44:27.270Z 35.569 -97.289 0km NNW of Jones, Oklahoma 5.9 3.3 ml 2013-08-08l22:46:29.350Z 36.863 -97.994 24km WNW of Medford, Oklahoma 5 3.2 ml 2013-08-08T06:57:51.000Z 35.3482 -96.5676 16km NE of Seminole, Oklahoma 3.93 3.3 ml 2013-08-01 T02:39:23.000Z 35.5179 -97.1282 4km NE of Harrah, Oklahoma 12.32 3 ml 2013-07-31T02:43:37.000Z 35.573 -97.302 1km WNW of Jones, Oklahoma 7 3 ml 2013-07-27T20:23:39.400Z 36.66 -97.387 7km WSW of Tonkawa, Oklahoma 5 3.3 ml 2013-07-24111 :52:05.000Z 35.373 -96.481 13km S of Boley, Oklahoma 8.6 3.5 ml 2013-07-01T09: 11 :38.000Z 36.636 -97 .683 26km NE of Enid, Oklahoma 4 3.5 ml 2013-07-01T08: 19:24.000Z 36.673 -97.668 19km NE of Enid, Oklahoma 7.9 3.2 ml 2013-06-30102:55:58.000Z 34.097 -96.548 9km E of Madill, Oklahoma 5 3 ml 2013-06-27T00:38:03.020Z 35.474 -97.112 4km ESE of Harrah, Oklahoma 10.8 3.4 ml 2013-06-26121 :00:50.500Z 35.96 -96.907 11 km E of Perkins, Oklahoma 5 3 ml 2013-06-24T23:07:49.490Z 34.47 -96.283 9km SW of Coalgate, Oklahoma 5 3.2 ml 2013-06-18112 :42 :49. O00Z 35.477 -97.115 8km NNE of McLoud, Oklahoma 13.5 3.2 ml .

2013-06-17T06:39:01.000Z 35.463 -97.116 4km NNW of McLoud, Oklahoma 7.4 3.3 ml 2013-06-16122:35:04.000Z 35.566 -97.292 8km W of Luther, Oklahoma 6.1 3.2 ml Facility Decommissioning Plan - Rev 2 February 2021 Page 50 of 56

Preparer: D. Horne; Date: 02/15/21 Table 2 Revision 2 Reviewer: E. Dulle; Date: 02/15/21 Historical Earthquakes in Oklahoma Greater than 3.0 Magnitude (As of February 9, 2021)

Date and Time Latitude Longitude Epicenter Depth (km) Magnitude Maa. Tvoe 1 2013-06-16118:06: 17.5902 35.568 -97.309 6km E of Jones, Oklahoma 7.1 3.6 ml 2013-06-16111 :49:50.9002 35.408 -96.471 9km S of Boley, Oklahoma 3.6 3 ml 2013-06-16T08:08:37.500Z 35.565 -97.308 1km W of Jones, Oklahoma 7.2 3.1 ml 2013-06-10122:24:31.000Z 35.466 -97.009 8km ENE of McLoud, Oklahoma 6.6 3.3 ml 2013-06-09107: 12:32.3802 35.615 -97.262 5km NNE of Jones, Oklahoma 7.2 3.7 mblg 2013-06-07T06:52:28.500Z 35.01 -96.308 Oklahoma 16.7 3 ml 2013-05-27l07:58:20.400Z 34.075 -96.59 15km ENE of Kingston, Oklahoma 6.7 3.2 ml 2013-05-20101 :46:35.000Z 35.666 -97.105 8km E of Luther, Oklahoma 5.5 3.2 ml 2013-04-28l03:06:42 .200Z 34.135 -96.808 13km ENE of Dickson, Oklahoma 5 3.5 ml 2013-04-27120:14:27 .200Z 35.656 -97.126 6km E of Luther, Oklahoma 6.6 3.4 ml 2013-04-25104:58:39.5902 35.667 -97.126 5km NE of Luther, Oklahoma 6.8 3 ml 2013-04-24122:54:33.1ooz 35.669 -97.112 8km ENE of Luther, Oklahoma 5.3 3 ml 2013-04-24118:04:22.1702 35 .69 -97.089 10km ENE of Luther, Oklahoma 5 3.3 ml 2013-04-23119:33:58.5402 35.679 -97.104 8km ENE of Luther, Oklahoma 6.6 3.1 ml 2013-04-22l00:00:22 .500Z 35.612 -97.258 6km NE of Jones, Oklahoma 5.5 3 ml 2013-04-17116:51 :01.800Z 35.686 -97.083 12km E of Luther, Oklahoma 6.8 3.2 ml 2013-04-17116:25:39.2402 35.685 -97.082 10km ENE of Luther, Oklahoma 7 3.2 ml 2013-04-17l14:56:16.300Z 35.659 -97.123 7km NE of Luther, Oklahoma 7.7 3.2 ml 2013-04-17101 :14:04.3002 35.659 -97.125 5km ENE of Luther, Oklahoma 7.7 3.4 ml 2013-04-16121 :51 :21.21 oz 35.663 -97.12 6km E of Luther, Oklahoma 2.3 3.6 ml 2013-04-16121 :03:04.5802 35.533 -96.764 8km NW of Prague, Oklahoma 5 3.3 ml 2013-04-16117:09:01 .720Z 35.679 -97.107 8km ENE of Luther, Oklahoma 2.5 3.3 ml 2013-04-16117:07: 19.5502 35.673 -97.114 7km E of Luther, Oklahoma 2.3 3.7 ml 2013-04-16116:47:50.9402 35.668 -97.115 7km E of Luther, Oklahoma 6.9 3.3 ml 2013-04-16116:44:05.000Z 35.671 -97.119 10km ESE of Luther, Oklahoma 7.1 3.5 ml 2013-04-16110:20:27. 790Z 35.684 -97.093 Oklahoma 6.5 3.3 ml 2013-04-16110:16:53.000Z 35.681 -97.098 8km ENE of Luther, Oklahoma 7 4 .2 mwr 2013-04-16l07:16:42.700Z 35.674 -97.106 8km E of Luther, Oklahoma 6.9 3.6 ml 2013-04-16107: 15:30.4002 35.672 -97.108 8km E of Luther, Oklahoma 7 3 ml 2013-04-16106:56:29. 700Z 35.686 -97.089 12km ENE of Luther, Oklahoma 6.2 4.4 mwr 2013-03-21116:34:35.000Z 35.467 -97.396 1km N of Midwest City, Oklahoma 5 3.2 ml 2013-03-21115:56:41.6802 35.492 -97.381 4km NNE of Midwest City, Oklahoma 10.5 3.3 ml 2013-03-16119:39:12.000Z 35.521 -96.783 9km WNW of Prague, Oklahoma 5 3 ml 2013-03-11T17:32:18.490Z 35.417 -96.548 9km SSW of Boley, Oklahoma 5 3.2 mblg 2013-03-06118:24:54.9202 35.545 -96.719 10km NW of Prague, Oklahoma 5 3.4 mblg 2013-03-04110:22:54.1602 34.191 -96.681 6km SSE of Tishomingo, Oklahoma 5 3.5 mblg 2013-02-27119:51: 12. 760Z 35.46 -97.335 3km SSW of Nicoma Park, Oklahoma 5 3.5 mblg 2013-01 -16120:51 :43.000Z 35.592 -97.356 6km WNW of Jones, Oklahoma 5 3.2 ml 2013-01-16106:26:35.2702 35.619 -97.337 Oklahoma 5 3.2 mblg 2013-01-04101 :59:20.000Z 35.38 -96.515 Oklahoma 5 3.5 mwr 2012-12-16116:46:07.000Z 36.128 -96.855 Oklahoma 5 3.1 ml 2012-12-12118:37:00.000Z 35.37 -96.496 Oklahoma 5 3 ml 2012-12-12103:30: 15.000Z 35.532 -96.759 Oklahoma 5 3.1 ml 2012-11-17104:48:58.000Z 36.661 -97.381 Oklahoma 5 3 ml 2012-10-28104:00:34.000Z 35.422 -96.537 Oklahoma 3.3 3.3 ml 2012-10-21110:44:15.000Z 35.653 -97.215 Oklahoma 5 3.4 ml 2012-10-17104:42:40.000Z 35 .67 -97 .111 Oklahoma 5 3.2 mblg 2012-10-09T08:49:07.000Z 36.083 -97.386 Oklahoma 8.9 3.3 ml 2012-09-30119: 17:17.000Z 35.523 -96.779 Oklahoma 5 3 ml 2012-09-09101 :58:52 .000Z 35.375 -96.537 Oklahoma 2.5 3.4 ml 2012-08-18103:30:11.000Z 35 .53 -96.777 Oklahoma 3.2 3.3 ml 2012-08-07110:47:50.000Z 35.395 -96 .587 Oklahoma 5 3 ml 2012-07-31116:03:40.000Z 35.558 -96 .754 Oklahoma 3 3.1 ml 2012-07-30119:35:06.000Z 35.497 -96 .824 Oklahoma 5 3.4 ml 2012-07-03116: 11 :37.000Z 35.585 -97.331 Oklahoma 5 3.2 ml 2012-06-14120:24:28.000Z 35.407 -97.434 Oklahoma City urban area, Oklahoma 1.9 3.1 ml 2012-06-13122:44:32.000Z 35.46 -96.7 Oklahoma 3 3.1 ml 2012-06-13106:21 :36.590Z 35.552 -97.264 Oklahoma 5 3.3 mblg Facility Decommissioning Plan - Rev 2 February 2021 Page 51 of 56

Preparer: D. Horne; Date: 02/15/21 Table 2 Revision 2 Reviewer: E. Dulle; Date: 02/15/21 Historical Earthquakes in Oklahoma Greater than 3.0 Magnitude (As of February 9, 2021)

Date and Time Latitude Longitude Epicenter Depth (km) Magnitude Maa. Tvoe 1 2012-05-11104:37:50.000Z 35.512 -96.788 Oklahoma 5 3.2 ml 2012-05-1 0T21 :14:31 .000Z 35.51 -96.781 Oklahoma 5 3.8 mwr 2012-04-30117: 14:01 .000Z 35.53 -96.76 Oklahoma 5 3.2 ml 2012-04-28102: 14:25.000Z 35 .534 -96.748 Oklahoma 5 3.1 ml 2012-04-21112:45:25.000Z 35.58 -97 .07 Oklahoma 5 3.2 ml 2012-04-16108:12:00.000Z 35.53 -96.759 Oklahoma 4.4 3.8 mwr 2012-04-14107:35:58.000Z 34.944 -96.001 Oklahoma 5 3 ml 2012-04-12112:10:04.000Z 35.523 -96.774 Oklahoma 5 3.1 mblg 2012-04-06116:20:28.000Z 35.72 -97.159 Oklahoma 5 3.1 ml 2012-04-03107:34:00.000Z 34.635 -95.875 Oklahoma 5 4.1 mb 2012-03-31111 :54:11 .000Z 35.437 -96.574 Oklahoma 5 3.3 mblg 2012-03-10110:11 :42.000Z 35.446 -96.572 Oklahoma 0.9 3.1 ml 2012-02-29122:20:42.000Z 35.725 -97.168 Oklahoma 4.9 3 mblg 2012-02-07116:29:29.000Z 35.395 -96.524 Oklahoma 5 3.3 ml 2012 17113:26:43.000Z 35 .378 -96.546 Oklahoma 3.6 3 ml 2012-01-03110 :56:58 .000Z 35 .536 -96.75 Oklahoma 3.6 3.4 ml 2011-12-31108 :07:17 .000Z 35.391 -96.52 Oklahoma 5 3.6 ml 2011 25114: 10:41 .000Z 35.398 -96.53 Oklahoma 5 3.6 ml 2011-12-09116:46:50.000Z 35.475 -96.855 Oklahoma 5 3 ml 2011-12-03104:42: 12.000Z 35 .525 -96 .768 Oklahoma 9.3 3.3 ml 2011-11-27111 :52:26.000Z 35.728 -97.166 Oklahoma 5 3.1 ml 2011-11-25121 :24:29.000Z 35 .512 -96.746 Oklahoma 3.8 3.4 ml 2011-11-25120:09:47.000Z 35.461 -96 .881 Oklahoma 0.1 3.4 ml 2011-11-24121: 11 :04.000Z 35.563 -96.788 Oklahoma 6.2 3.4 mwr 2011-11-21121 :46:09.000Z 35 .503 -96.81 Oklahoma 5 3 ml 2011-11-18107:41 :08.000Z 35.541 -96.762 Oklahoma 7.4 3.3 ml 2011-11-16117: 10:52.000Z 35 .505 -96 .803 Oklahoma 5 3.2 ml 2011-11-14105:31 :42.000Z 35 .521 -96.782 Oklahoma 3.1 3.2 ml 2011-11-13109:49: 12.000Z 35.457 -96 .876 Oklahoma 4.8 3.2 ml 2011-11-12101 :41 :03.000Z 35.532 -96 .753 Oklahoma 6.2 3.2 ml 2011-11-12101: 18:43.000Z 35.545 -96.73 Oklahoma 3.9 3.1 ml 2011-11-11119:19:16.000Z 35.537 -96.753 Oklahoma 3.6 3.2 ml 2011-11-10108:36:38.000Z 35.487 -96 .85 Oklahoma 3.3 3.2 md 2011-11-09115:21 :02.000Z 35 .513 -97 .39 Oklahoma City urban area, Oklahoma 3.1 3 md 2011-11-09112 :08 :36.000Z 35.534 -96.761 Oklahoma 5 3.4 ml 2011-11-08119:05 : 18.000Z 35 .526 -96 .77 Oklahoma 3 3.5 mwr 2011-11~08103:05:07.oooz 35.52 -96.786 Oklahoma 5 3.1 ml 2011-11-08102:46:57.000Z 35.531 -96.788 Oklahoma 5 4.8 mwr 2011-11-07117:09:52 .000Z 35 .506 -96.798 Oklahoma 5 3.2 ml 2011-11-07113:50:20 .000Z 35.477 -96.856 Oklahoma 3.1 3.1 md 2011-11-07108:12:35 .000Z 35 .512 -96.786 Oklahoma 3.1 3.1 md 2011-11-07102:38:20 .000Z 35 .533 -96.75 Oklahoma 5 3.1 ml 2011-11-07101 :26:31 .000Z 35 .518 -96 .786 Oklahoma 3.1 3.3 mblg 2011-11-07101: 17: 13.000Z 35 .522 -96.778 Oklahoma 4 3 md 2011-11-06118:26:57.000Z 35.473 -96.869 Oklahoma 3.1 3.1 md 2011-11-06117:52 :35.000Z 35.494 -96 .828 Oklahoma 3.1 3.4 mwr 2011-11-06115:07:07.000Z 35.484 -96.856 Oklahoma 5 3.8 mwr 2011-11 -06111 :03:52.000Z 35.496 -96 .838 Oklahoma 5 3.1 ml 2011-11 -06110:52:35.000Z 35 .537 -96 .779 Oklahoma 3.1 3.6 mwr 2011-11-06109:39:57.000Z 35.469 -96.865 Oklahoma 5 3.7 mwr 2011-11-06109:22:04 .000Z 35.485 -96.844 Oklahoma 5 3.5 ml 2011-11-06108:14:13.000Z 35 .525 -96 .771 Oklahoma 5.6 3.1 ml 2011-11-06108:04:56 .2702 35.585 -96.836 Oklahoma 5 3 mblg 2011-11-06107:38:31 .7102 35 .517 -96 .834 Oklahoma 5 3.6 mblg 2011-11-06107:32:41 .000Z 35.48 -96.847 Oklahoma 5 3.2 ml 2011-11-06106:31: 11 .000Z 35.479 -96.859 Oklahoma 5 3.7 mwr 2011-11-06104:53:59.000Z 35 .546 -96.749 Oklahoma 5 3.3 ml 2011-11-06104:31 :50.000Z 35.522 -96.776 Oklahoma 5 3.9 ml Facility Decommissioning Plan - Rev 2 February 2021 Page 52 of 56

Preparer: D. Horne; Date: 02/15/21 Table 2 Revision 2 Reviewer: E. Dulle; Date: 02/15/21 Historical Earthquakes in Oklahoma Greater than 3.0 Magnitude (As of February 9, 2021)

Date and Time Latitude Longitude Epicenter Depth (km) Magnitude Maa. Tvoe 1 2011-11-06T04:08 :13.000Z 35.515 -96 .789 Oklahoma 5 3 ml 2011-11-06T04:03:42.000Z 35.521 -96 .771 Oklahoma 5 4 ml 2011-11-06T03:53:10.000Z 35.532 -96 .765 Oklahoma 5.2 5.7 mww 2011-11-06T01 :03:58.000Z 35.546 -96 .749 Oklahoma 5 3 ml 2011-11-05T14:36 :30.380Z 35.518 -96 .778 Oklahoma 5 3.6 ml 2011-11-05T13:42:26.000Z 35.53 -96 .766 Oklahoma 5 3.2 ml 2011-11-05T11 :24: 15.000Z 35 .525 -96 .773 Oklahoma 5 3.4 ml 2011-11-05T09: 12:11.000Z 35.528 -96 .766 Oklahoma 5 3.3 ml 2011-11-05T07:27:19.000Z 35.544 -96 .765 Oklahoma 3.2 3.3 ml 2011-11-05T07: 12:45.000Z 35.55 -96 .764 Oklahoma 3.1 4.8 mwr 2011-10-28T09: 18:46.000Z 35 .525 -97.386 Oklahoma City urban area, Oklahoma 5 3.4 mblg 2011-10-28T06:24:57.000Z 35.518 -97.38 Oklahoma City urban area, Oklahoma 3.2 3.2 mblg 2011-10-05T10:40:27.000Z 35.504 -97 .232 Oklahoma 3.8 3 ml 2011-09-12T15:35:28.000Z 35.629 -97 .244 Oklahoma 3.4 3.3 ml 2011-09-06T00: 19:06.000Z 35.466 -97 .045 Oklahoma 5 3 ml 2011-08-31T19:58:25.000Z 35.498 -97 .25 Oklahoma 3.1 3 ml 2011-08-18116:50:52.000Z 34.881 -97 .744 Oklahoma 5 3 ml 2011-08-01T01 :20:07.000Z 35.522 -97.226 Oklahoma 5 3 ml 2011-03-31T05:41 :30.000Z 35.439 -96 .53 Oklahoma 1.1 3.2 mwr 2011-03-11T10:56:23.000Z 35.45 -97.087 Oklahoma 5 3.1 mblg 2011-01-15T10:51 :30.000Z 35.509 -97.222 Oklahoma 3.4 3.4 mblg 2010-12-28T01 :49:24.000Z 34.696 -95 .893 Oklahoma 5 3.1 md 2010-12-24T10:49:07.000Z 34.69 -96 .361 Oklahoma 5 3 md 2010-12-12T01 :07:56.000Z 35.431 -96 .981 Oklahoma 5 3.2 mwr 2010-11 -28T13:46:26.000Z 35.619 -97.239 Oklahoma 3.4 3.3 md 2010-11-28103:28:43.000Z 35.612 -97.242 Oklahoma 2.5 3.5 mblg 2010-11-28T03:26:47.000Z 35.654 -97 .224 Oklahoma 5 3 mblg 2010-11-24T23:45: 13.000Z 35 .614 -97.24 Oklahoma 6.2 3.1 mblg 2010-11-24T22:48:30.000Z 35.612 -97.246 Oklahoma 5 3.9 mwr 2010-10-25T20:53: 13.000Z 34.874 -97.741 Oklahoma 5 3.2 mblg 2010-10-13T14:06:30.000Z 35.192 -97.32 Oklahoma 13 4.4 mwc 2010-10-01122:39:14.000Z 34.861 -96.029 Oklahoma 5 3.1 mblg 2010-09-25T12: 19:26.000Z 34.109 -96.715 Oklahoma 5 3.3 mblg 2010-09-19T22:01 :47.000Z 35.611 -97.246 Oklahoma 5 3.5 mwr 2010-09-16121 :41 :34.000Z 35.609 -97 .243 Oklahoma 4 3.3 mwr 2010-09-15T20:03:53.000Z 35.609 -97 .242 Oklahoma 4.2 3.1 mblg 2010-09-04T16:22:09.000Z 35.611 -97.24 Oklahoma 3.3 3.3 mblg 2010-09-01 T00:46:31.000Z 35.611 -97.235 Oklahoma 3.1 3.1 mblg 2010-08-02T09:52 :19.000Z 35.559 -97.241 Oklahoma 3.2 3.4 mblg 2010-06-14T21 :33:56 .500Z 34.865 -97.676 Oklahoma 5 3.1 md 2010-05-07T12:44:57 .000Z 35 .528 -97.299 Oklahoma 5.2 3.4 mblg 2010-04-15T13:22:36.000Z 34.631 -96.268 Oklahoma 0.9 3.2 mblg 2010-04-15T00:49:51.360Z 34.705 -96 .398 Oklahoma 5 3 mblg 2010-04-12T04:04:48.000Z 35.611 -97 .122 Oklahoma 5 3 mblg 2010-04-08T12:42:43.000Z 35.523 -97.284 Oklahoma 0.4 3.4 mblg 2010-03-22T02:37:18.31 OZ 35.556 -96 .75 Oklahoma 8 3.7 mwr 2010-03-13T09:02:44.41 OZ 35.387 -98 .113 Oklahoma 5 3.1 mblg 2010-03-11T23:57:29.51 oz 35.475 -98 .123 Oklahoma 6.4 3.4 mblg 2010-03-11T10:54:25.000Z 35.401 -98 .06 Oklahoma 5 3 md 2010-03-11T08:11 :01.900Z 35 .378 -98.046 Oklahoma 5 3 md 2010-03-1 0T06:04:35.61 OZ 35.599 -96.769 Oklahoma 5 3.1 mblg 2010-03-05T20:35: 13.750Z 35 .582 -96.784 Oklahoma 5 3.1 mblg 2010-02-27T22:22:27 .31 oz 35.553 -96.752 Oklahoma 5 4.1 mwr 2010-02-26T09:02:07 .600Z 35.616 -97.064 Oklahoma 5.7 3.1 mblg 2010-02-19T16: 12:48.820Z 35.668 -97.05 Oklahoma 5 3 mblg 2010-02-15T03:32:26.400Z 35 .557 -97.298 Oklahoma 3.3 3 mwr 2010-02-13T05:30:55.780Z 35 .53 -97.272 Oklahoma . 8.1 3.2 mwr 2010-01-24T07: 14:52.230Z 35 .502 -97 .245 Oklahoma 6 3.6 mwr Facility Decommissioning Plan - Rev 2 February 2021 Page 53 of 56

Preparer: D. Horne; Date: 02/15/21 Table 2 Revision 2 Reviewer: E. Dulle; Date: 02/15/21 Historical Earthquakes in Oklahoma Greater than 3.0 Magnitude

{As of February 9, 2021)

Date and Time Latitude Longitude Epicenter Depth (km) Magnitude Maa. Tvoe 1 2010-01-17113:33:43. 71 oz 35.553 -97.221 Oklahoma 5 3 mblg 2010-01-15115:27:02.320Z 35.555 -97.249 Oklahoma 8 3.7 mwr 2010-01-15115:18:26.350Z 35.576 -97.25 Oklahoma 8 3.8 mwr 2010-01-14110:05:34 .150Z 35.539 -97.238 Oklahoma 5 3.3 mblg 2009-12-20T05:05:21 .340Z 35.554 -97.267 Oklahoma 5 3.1 mblg 2009-12-13108: 38: 25. 880Z 35.587 -97.285 Oklahoma 5 3.6 mblg 2009-12-12111 :34:05.450Z 35.556 -97.316 Oklahoma 5 3.1 mblg 2009-12-07117:44:25.180Z 35.556 -97.25 Oklahoma 5 3.5 mblg 2009-11-29101 :36:58 .630Z 35.563 -97.275 Oklahoma 5 3 mblg 2009-11-17T04:00: 17.??OZ 34.462 -97.532 Oklahoma 5 3.1 mblg 2009-11-16111 :12: 37. 140Z 35.482 -97.228 Oklahoma 5 3 mblg 2009-11-14111: 13:01.340Z 35.494 -97.204 Oklahoma 5 3.1 mblg 2009-10-23103:56:29. 730Z 35.804 -97.029 Oklahoma 5 3 mblg 2009-08-28T02:09:06.000Z 35.565 -97.29 Oklahoma 5 3.5 mblg 2009-08-27108:22: 14. 530Z 34 .942 -96.618 Oklahoma 5 3.4 mblg 2009-07-22T02:25:59.800Z 35.742 -96.944 Oklahoma 5 3.3 mblg 2009-07-01117:14:48 .240Z 35.547 -97.169 Oklahoma 5 3.4 mblg 2009-06-26121 :23: 13.750Z 36.361 -97.467 Oklahoma 5 3.7 mblg 2009-06-14T21 :31 :09.020Z 35 .659 -96.85 Oklahoma 5 3.4 mblg 2009-03-08T13:06 :39.940Z 35.446 -97.456 Oklahoma City urban area, Oklahoma 5 3.4 mblg 2009-02-25T04:14:15.330Z 34.735 -96 .036 Oklahoma 5 3.3 mblg 2009-02-22T09: 43: 06. 7 50Z 36.369 -98.087 Oklahoma 5 3.2 mblg 2009-02-03T10:23: 10.01 OZ 34.589 -96.34 22km NW of Coalgate, Oklahoma 5 3.1 mblg 2009-01-28T11 :19:09.470Z 35.163 -97.871 Oklahoma 5 3.4 mblg 2008-10-30T16:25:00.670Z 35.443 -97 .118 Oklahoma 5 3.1 mblg 2008-10-14T03:07:28.030Z 35 .766 -100.714 Texas Panhandle region 5 3.7 mwr 2008-10-12T12:08 :15. ??OZ 35.621 -100.315 Texas Panhandle region 5 3 mblg 2008-06-09T22 :59: 4 7 .120Z 35.346 -96 .767 Oklahoma 5 3.1 md 2007-10-07T13:54 :21 .550Z 34.51 -100.146 Texas Panhandle region 5 3.1 mblg 2007-09-27T15:21 :02 .060Z 35.471 -100 .108 Texas Panhandle region 5 3 mblg 2007-05-27T21 :03:22 .11 OZ 35.149 -95.976 Oklahoma 5 3.2 md 2006-10-06T22: 13: 16.780Z 34 .122 -97 .625 Oklahoma 5 3.5 mblg 2006-04-05T18:46:23.140Z 34.069 -97 .314 Oklahoma 5 3 mblg 2006-03-15T08:30:25.860Z 35 .091 -96.3 Oklahoma 5 3 md 2005-04-22T05: 17: 04. 090Z 34 .179 -95.192 Oklahoma 5 3 mblg 2004-11-22T23:42:13.450Z 34 .864 -97.672 Oklahoma 5 3 mblg 2004-06-08T00:15:09.990Z 34 .233 -97.254 Oklahoma 5 3.5 mblg 2002-10-20T02:18:13.000Z 34.274 -96.079 Oklahoma 5 3.4 mblg 2002-05-31T09:57 :10.02oz 34.025 -97.619 Oklahoma 5 3.3 mblg 2002-02-08T16:07 :13.600Z 34.727 -98.361 Oklahoma 5 3.8 mblg 2001-07-24T14:02:35.000Z 37.7 -97 Kansas 5 3 mblg 1999-10-25T23:19:58.370Z 36.846 -99 .659 Oklahoma 26.1 3 mblg 1998-10-30T17:41 :22.200Z 36 .8 -97.6 Oklahoma 5 3.5 mblg 1998-07-07T18:44:44.460Z 34.719 -97.589 Oklahoma 5 3.2 mblg 1998-04-28T14:13:01.680Z 34 .782 -98.416 Oklahoma 5 3.9 mb 1997-09-06T23:38:00.91 OZ 34.66 -96.435 Oklahoma 5 4.5 mblg 1997-02-15T09: 08: 55 .460Z 34.973 -100.569 Texas Panhandle region 5 3.2 mblg 1997-02-12T23:53:10.770Z 34.947 -100.89 Texas Panhandle region 5 3 mblg 1996-11-23T10:54:18.500Z 35 .04 -100 .504 Texas Panhandle region 5 3 mblg 1995-09-15T00:31 :33.260Z 36.87 -98.69 Oklahoma 5 4.1 mblg 1995-06-01 T04:49 :29.320Z 34 .287 -96.732 Oklahoma 5 3 mblg 1995-04-05T05:31 :16.230Z 35.2 -99.028 Oklahoma 5 3 mblg 1995-01-18T15:51 :39.420Z 34 .774 -97 .596 Oklahoma 5 4.2 mblg 1994-04-29T03:28:58.680Z 36.25 -98.09 Oklahoma 5 3 mblg 1993-01-14T17:06:10.450Z 36.595 -98.275 Oklahoma 5 3.1 mblg 1992-12-17T07:18:04.270Z 34.744 -97.581 Oklahoma 5 3.6 mblg 1991-01-24T05:00:26.900Z 36.378 -97.3 Oklahoma 5 3 mblg 1990-11-15T11 :44:41.400Z 34.76 -97.59 Oklahoma 5 3.9 mblg Facility Decommissioning Plan - Rev 2 February 2021 Page 54 of 56

Preparer: D. Horne; Date: 02/15/21 Table 2 Revision 2 Reviewer: E. Dulle; Date: 02/15/21 Historical Earthquakes in Oklahoma Greater than 3.0 Magnitude (As of February 9, 2021)

Date and Time Latitude Longitude Epicenter Depth (km) Magnitude Maa. Tvoe 1 1989-07-20T06:07:50.420Z 36.434 -98.876 Oklahoma 5 3.1 mblg 1987-12-08T01 :42:40.3002 36.055 -98.024 Oklahoma 5 3.7 mblg 1987-01-24T16:08: 17.000Z 35.828 -98 .097 Oklahoma 5 3.1 mblg 1985-09-18T15:54:04.6402 33.548 -97.051 central Texas 5 3.3 mblg 1984-02-03T04:38:27 .11 OZ 34.657 -97 .394 Oklahoma 5 3.2 mblg 1982-05-03T07:54:50.000Z 34.07 -96.38 Oklahoma 5 3 mblg 1981-07-11T21 :09:22.5402 34.884 -97.677 Oklahoma 5 3.5 mblg 1980-11-02T10:00:49.3002 35.472 -97.777 Oklahoma 8 3 1980-06-09T22:37:09.900Z 35.513 -101.082 Texas Panhandle region 5 3.4 1979-09-13T00:49: 19.8002 35.219 -99 .518 Oklahoma 5 3.4 1979-06-07T07:39:35.600Z 35.187 -99.812 Oklahoma 5 3 1976-04-19T04:42:42.200Z 36.134 -99.841 Oklahoma 5 3.5 1976-04-16T18:59:44.2002 36.107 -99.875 Oklahoma 5 3.4 1975-11-29T14:29:40.9002 34 .521 -97.347 Oklahoma 5 3.5 lg 1975-1 o-12To2:58: 11.20oz 34 .816 -97.406 Oklahoma 20 3.2 lg 1975-09-13T01 :25:02 .8002 34.139 -97 .369 Oklahoma 5 3.4 lg 1974-02-15T13:33:49.2002 36.5 -100.693 Oklahoma 24 4.5 mb Notes:

Km - kilometers Source: USGS Earthquake Hazards Program https://earthquake.usgs.gov/earthquakes/map Facility Decommissioning Plan - Rev 2 February 2021 Page 55 of 56

Preparer: D. Horne; Date: 02/15/21 Table 2 Revision 2 Reviewer: E. Dulle; Date: 02/15/21 Historical Earthquakes in Oklahoma Greater than 3.0 Magnitude .

(As of February 9, 2021)

I1 Date and Time I I Latitude Longitude I Epicenter I I Depth (km) Magnitude Ma9. Type I 1 I

Magnitude Type = The method or algorithm used to calculate the preferred magnitude for the event See table below.

Magnitude Distance Magnitude Type Range Range Comments Based on the duration of shaking as measured by the time decay of the amplitude of the seismogram . Often used to compute magnitude from seismograms with Duration (Md or md) <4 0 - 400 km "clipped" waveforms due to limited dynamic recording range of analog instrumentation, which makes it impossible to measure peak amplitudes .

The original magnitude relationship defined by Richter and Gutenberg for local earthquakes in 1935. It is based on the maximum amplitude of a seismogram Local (ML Ml, or ml) 2 - 7.5 O - 600 km recorded on a Wood-Anderson torsion seismograph. A lthough these instruments are no longer widely in use, ML values are calculated using modern instrumentation with appropriate adiustments .

Short-period surface wave 150 - 1100 A magnitude for regional earthquakes based on the amplitude of the Lg surface 3.5 - 7 (mb_ Lg, mb_lg , or MLg) km waves as recorded on short-period instruments.

15 - 100 Based on the amplitude of P body-waves as recorded on short-period instruments Short-period body wave (mb) 4-7 degrees that are most sensitive to waves with a period of about 1 s.

Twenty-second surface wave 20 - 160 A magnitude for distant earthquakes based on the amplitude of Rayleigh surface 5 - 8.5 (Ms or Ms_20) degrees waves measured at a period near 20 sec.

l:3ased on the scalar seIsmIc-moment ot tne eartnquaKe , as aeterminea oy a moment-tensor inversion. Mwb - Mw based on moment tensor inversion of long-Moment (generic notation Mw period (~10- 100 s) body-waves (P- and SH). Mwc -- Moment magnitude derived or mw. Specific types denoted from a centroid moment tensor inversion of intermediate- and long-period body- and Mwb or mwb, Mwc or mwc, > 3.5 all surface-waves . Mwr -- Moment magnitude derived from a moment tensor inversion Mwr or mwr, and Mww or of complete waveforms at regiona l distances (less than ~13 degrees). Sometimes mww) called RMT. Mww -- Moment magnitude derived from a centroid moment tensor inversion of the W-nhase .

Based on an estimate of moment calculated from the integra l of the displacement of Moment (Mi or Mwp) 5-8 all the P wave recorded on broadband instruments .

Based on the seismic energy radiated by the earthquake as estimated by integration Energy (Me) > 3.5 all of digital waveforms Facility Decommissioning Plan - Rev 2 February 2021 Page 56 of 56

Preparer: A Anstaett; Date: 2/23/21 Table 2 Revision 2 Rev iewer: E. Dul le; Date: 2/25/21 Monitor Well Inventory- 02W Wells Screened Interval Date TD BGS TOC Elev Well Site Area Formation {BGS)

Installed Top Bottom (ft.) (ft. AMSL) 02W01 BA#l Transition Zone 7/15/2002 8.2 17.7 20 943.73 02W02 BA#l Transition Zone 7/15/2002 7.7 17.2 20 941.35 02W03 BA#l Alluvium by Escarpment 7/15/2002 5.2 14.7 17 940.22 02W04 BA#l Alluvium by Escarpment 7/16/2002 6.2 15.7 18 939.27 02W05 BA#l Alluvium w/ clays 7/16/2002 6.2 15.7 19 938.62 02W06 BA#l Alluvium 7/17/2002 6.9 21.2 24 938.67 02W07 BA#l Alluvium 7/17/2002 7.5 21.7 25 939.14 02W08 BA#l Alluvium 7/17/2002 8.9 23.2 26 939.45 02W09 BA#l Transition Zone 7/18/2002 7.9 22.2 25 948.44 02W10 BA#l Transition Zone 7/18/2002 5.9 20.2 23 944.49 02W11 BA#l Alluvium 7/18/2002 5.7 25.2 28 940.04 02W12 BA#l Alluvium w/ clays 7/19/2002 5.4 24.9 26 940.21 02W13 BA#l Transition Zone 7/19/2002 9.5 23.7 26 939.52 02W14 BA#l Alluvium 7/19/2002 6.2 25.7 29 939.96 02W15 BA#l Alluvium by Escarpment 7/22/2002 7.9 12.7 15 938.50 02W16 BA#l Alluvium 7/22/2002 7.2 16.7 20 937.83 02W17 BA#l Alluvium 7/22/2002 8.5 22.7 25 939.01 02W18 BA#l Alluvium 7/23/2002 6.2 25.7 29 939.26 02W19 BA#l Alluvium 7/23/2002 8.3 22.5 25 939.44 02W20 BA#l Transition Zone by Escarpment 7/23/2002 8.5 22.7 26 950.81 02W21 BA#l Alluvium 7/25/2002 10.5 24.7 27 939.19 02W22 BA#l Alluvium 7/26/2002 6.2 16.2 19 937.73 02W23 BA#l Alluvium 7/26/2002 7.9 22.2 25 937.86 02W24 BA#l Alluvium 7/26/2002 5.2 24.7 28 939.24 02W25 BA#l Sandstone B 7/29/2002 11.5 31.0 32 957.38 02W26 BA#l Transition Zone 7/29/2002 9.9 24.2 28 951.85 02W27 BA#l Sandstone B 7/30/2002 10.2 19.7 22 944.97 Facility Decommissioning Plan - Rev 2 February 2021 Page 1 of 2

Preparer: A. Anstaett; Date: 2/23/21 Table 2 Revision 2 Rev iewer: E. Dul le; Date: 2/25/21 Monitor Well Inventory - 02W Wells Screened Interval Date TDBGS TOC Elev Well Site Area Formation (BGS)

Installed Top Bottom (ft.) (ft. AMSL) 02W28 BA#l Transition Zone 7/30/2002 11.5 23.0 26 946.41 02W30 BA#l Sandstone B 7/31/2002 10.2 22.7 25 946.64 02W32 BA#l Alluvium w/ clays 7/31/2002 6.4 20.7 24 939.70 02W33 BA#l Alluvium by Escarpment 8/1/2002 5.2 14.7 17 937.87 02W34 BA#l Alluvium 8/1/2002 5.2 24.7 28 938.59 02W35 BA#l Alluvium 8/1/2002 6.2 25.7 29 938.45 02W36 BA#l Alluvium 8/2/2002 5.2 24.7 27 938.68 02W37 BA#l Alluvium 8/2/2002 5.2 24.7 27 938.87 02W38 BA#l Alluvium 8/2/2002 5.7 26.2 26 940.08 02W39 BA#l Transition Zone by Escarpment 8/2/2002 7.5 21.7 25 950.14 02W40 BA#l Sandstone B 8/5/2002 15.5 29.7 32 954.62 02W41 BA#l Sandstone B 8/5/2002 13.1 27.3 31 953.50 02W42 BA#l Sandstone B 8/5/2002 7.2 27.7 31 951.21 02W43 BA#l Alluvium 8/6/2002 8.2 27.2 30 939.06 02W44 BA#l Alluvium 8/6/2002 6.7 26.2 29 939.00 02W45 BA#l Alluvium 8/6/2002 8.2 27.7 31 939.22 02W47 BA#l Sandstone B 8/7/2002 10.2 29.7 32 957.14 02W48 BA#l Sandstone C 9/25/2002 34.6 54.5 60 938.99 02W50 BA#l Sandstone B 8/8/2002 13.2 32.7 36 961.14 02W51 BA#l Sandstone B 8/9/2002 9.2 33.7 37 962.18 02W52 BA#l Sandstone B 8/12/2002 13.7 33.5 37 960.86 02W53 BA#l Sandstone B 8/16/2002 5.2 19.7 23 943.76 02W62 BA#l Alluvium 9/25/2002 5.5 25.0 28 938.53 Facility Decommissioning Plan - Rev 2 February 2021 Page 2 of 2

Preparer: A. Anstaett; Date: 02/23/21 Table 2 Revision 2 Reviewer: E. Dulle; Date: 02/25/21 Monitor Well Inventory - 1300 Series Wells Screened Interval Date TD BGS TOC Elev Well Site Area Formation (BGS)

Installed Top Bottom (ft.) (ft. AMSL) 1311 SW of U-Pond 1 Sandstone A 2/21/1985 25.00 40.00 42 .70 996.10 1312 W of U-Pond 1 Sandstone A 2/21/1985 21.00 36.00 39.20 992.66 1313 N of U-Pond 1 Sandstone A 2/25/1985 23.00 38.00 38.00 995.09 1314 S of BA #1 Trenches Sandstone B 2/13/1985 30.00 45.00 50.00 972.01 1315R N of BA#l Trenches Sandstone B 7/25/2002 10.50 24.70 25.00 949.05 1316R NW of BA#l Trenches Sandstone B 7/30/2002 10.20 24.70 25.00 946.45 1319B-1 E of U Building Sandstone B 3/25/2003 65.00 79.50 80.00 1009.65 1319B-3 E of U Building Sandstone B 4/1/2003 65.00 79.50 80.00 1011.22 1319B-4 E of U Building Sandstone B 7/19/2003 65.00 79.50 80.00 1009.46 1320 W of U-Pond #2 . Sandstone A 1/20/1989 28.50 38.50 41.30 1001.74 1321 W of U-Pond #2 Sandstone C 1/25/1989 111.50 121.60 124.40 1001.73 1324 E of BA #4 Sandstone A 2/8/1989 25.00 35.00 35.00 997.63 1331 NW of BA #2 Sandstone A 3/11/1989 12.20 22.20 25.00 978.34 1335A W of BA #4 Sandstone A 5/21/1996 43.40 998.70 1336A N of U-Pond #2 Sandstone A 5/18/1994 18.00 28.00 31.00 988.29 1337 NE of U-Pond #2 Sandstone A 2/12/1997 24.00 34.00 34.50 994.45 1338 NE of U-Pond #2 Sandstone B 2/12/1997 49.00 59.00 59.50 994.24 1340 NE of U-Pond #1 Sandstone A 2/16/1997 20.00 30.00 30.50 984.83 1341 NE of U-Pond #1 Sandstone B 2/16/1997 50.00 60.00 60.50 984.78 1343 Center near River Alluvium 9/29/1997 8.50 23.50 24.50 941.58 1344 East near River Alluvium 9/29/1997 8.30 23.30 24.30 937.90 1345 N of U-Pond #1 Sandstone B 4/8/2003 45.00 59.50 60.00 988.97 1346 N of U-Pond #2 Sandstone B 4/9/2003 45.00 59.50 60.00 991.50 1347 N of U-Pond #2 Sandstone A 4/9/2003 24.50 39.50 40.00 996.33 1348 S of 1206 Drainage Sandstone A 4/10/2003 15.00 34.50 35.00 999.54 1350 E of 1206 Drainage Sandstone A 4/11/2003 10.00 19.50 20.00 992.91 1351 E of 1206 Drainage Sandstone A 4/11/2003 5.00 14.50 15.00 982.44 Facility Decommissioning Plan - Rev 2 February 2021 Page 1 of 3

Preparer: A Anstaett; Date: 02/23/21 Table 2 Revision 2 Reviewer: E. Dulle; Date: 02/25/21 Monitor Well Inventory- 1300 Series Wells Screened Interval Date TD BGS TOC Elev Well Site Area Formation {BGS)

Installed Top Bottom (ft.) (ft. AMSL) 1352 E of 1206 Drainage Sandstone A 4/11/2003 12.00 21.50 22.00 985.60 1354 E of 1206 Drainage Sandstone A 7/8/2003 15.50 30.50 30.50 989.34 1355 E of 1206 Drainage Sandstone A 7/8/2003 23.50 38.00 38.50 995.92 1356 E of 1206 Drainage Sandstone A 7/7/2003 10.00 19.50 20.00 985.21 1357 E of 1206 Drainage Sandstone A 7/22/2003 12.25 26.75 27.25 990.53 1358 E of 1206 Drainage Sandstone A 7/22/2003 9.00 23.50 24.00 989.60 1359 E of 1206 Drainage Sandstone A 10/16/2003 7.00 17.00 17.00 984.05 1360 E of 1206 Drainage Sandstone A 10/16/2003 8.00 18.00 18.40 985.20 1361 North of BA #1 Alluvium 9/27/2012 7.00 29.50 29.50 940.28 1362 North of BA #1 Alluvium 5/14/2013 7.50 27.50 27.90 939.95 1363 North of BA #1 Alluvium 5/13/2013 3.40 28.40 28.90 939.72 1364 North of BA #1 Alluvium 5/13/2013 7.20 27.20 27.70 939.47 1365 North of BA #1 Alluvium 5/13/2013 8.30 28.30 28.80 939 .66 1366 North of BA #1 Alluvium 5/13/2013 3.00 28.00 28.50 940.30 1367 North of BA #1 Alluvium 12/9/2014 7.85 27.85 28.35 939.26 1368 North of BA #1 Alluvium 12/9/2014 9.00 29.00 30.50 940.15 1369 North of BA #1 Alluvium 12/10/2014 10.00 30.00 30.50 939.98 1370 North of BA #1 Alluvium 12/10/2014 6.75 26.75 28.50 939.20 1371 North of BA #1 Alluvium 12/9/2014 10.50 25.50 26.00 935.32 1372 North of BA #1 Alluvium 12/9/2014 5.70 25.70 27.50 937.52 1373 North of BA #1 Alluvium 12/9/2014 9.00 24.00 24.50 935.52 1377 NE of BA #2 Sandstone A 11/7/2014 16.72 26.72 30.00 988.71 1378 NNE of BA #2 Sandstone A 11/7/2014 9.25 19.25 23.00 979.24 1379 N of BA #2 Sandstone A 11/7/2014 9.97 19.97 22.00 981.16 1381 W of U-Pond #2 Sandstone A 10/28/2014 20.73 30.73 31.50 997.25 1382 W of U-Pond #2 Sandstone B 10/28/2014 54.35 67.60 65.00 997.40 1383 E of U-Pond #2 Sandstone A 10/29/2014 36 .20 46.20 49.00 1002.26 Facility Decommissioning Plan - Rev 2 February 2021 Page 2 of 3

Preparer: A. Anstaett; Date: 02/23/21 Table 2 Revision 2 Reviewer: E. Dulle; Date: 02/25/21 Monitor Well Inventory- 1300 Series Wells Screened Interval Date TDBGS TOC Elev Well Site Area Formation (BGS)

Installed Top Bottom (ft.) (ft. AMSL) 1384 E of U-Pond #2 Sandstone B 10/29/2014 54.97 64.97 68.00 1002.07 1385 N of U-Pond #2 Sandstone A 10/31/2014 26.82 36.82 40.00 993.89 1386 N of U-Pond #2 Sandstone B 10/30/2014 50.70 65.70 70.00 993.83 1387 NE of U-Pond #2 Sandstone A 11/3/2014 9.45 19.45 22.00 981.48 1388 NE of U-Pond #2 Sandstone B 11/3/2014 31.83 46.83 50.00 981.11 1389 NE of U-Pond #2 Sandstone A 10/31/2014 19.45 29.45 33.00 987.94 1390 NE of U-Pond #2 Sandstone B 10/31/2014 41.06 56.56 60.00 987.84 1391 E of U-Pond #2 Sandstone B 11/3/2014 29.51 44.51 47.00 973.69 1392 Near 1336A Sandstone B 10/29/2014 54.25 64.25 69.00 987.43 1393 Near 1346 Sandstone A 10/29/2014 25.90 35.90 39.00 992.48 1394 Near 1347 Sandstone B 10/30/2014 52.25 67.25 70.00 997.21 1395 W of UPl Sandstone A 11/18/2017 12.1 27.1 27.5 986.25 1396 N of UPl Sandstone A 11/18/2017 9.5 24.5 24.9 987.17 1397 NNE of UPl Sandstone A 11/19/2017 9.6 24.6 25.0 982.33 1398 E of UPl Sandstone A 11/19/2017 7.6 27.6 28.0 984.95 1399 SW of UPl Sandstone A 11/18/2017 17.1 32.1 32.5 989.91 Facility Decommissioning Plan - Rev 2 February 2021 Page 3 of 3

Preparer: A. Anstaett; Date: 02/23/21 Table 2 Revision 2 Reviewer: E. Dulle; Date: 02/25/21 Monitor Well Inventory - 1400 Series Wells Screened Interval Date TD BGS TOC Elev Well Site Area Formation (BGS)

Installed Top Bottom (ft.) (ft. AMSL) 1400 W of UPl Sandstone A 11/18/2017 7.2 22.2 22.6 982.38 1401 In NW UP2 Sandstone A 11/16/2017 23.1 43.1 43.5 1002.16 1402 In NE UP2 Sandstone A 11/17/2017 19.6 39.6 40.0 1002.23 1403 E of UP2 Sandstone A 11/20/2017 10.6 30.6 31.0 986.84 1404 N end of GETR-BAl-01 BAl Transition Zone 11/14/2017 11.3 21.3 21.7 941.47 1405 Center of GETR-BAl-01 BAl Transition Zone 11/14/2017 11.2 26.2 26.6 944.43 1406 Send of GETR-BAl-01 BAl Transition Zone 11/15/2017 14.1 24.1 24.5 948.62 1407 Center of GWI-BAl-01 Top of Sandstone B 11/15/2017 5.6 10.6 11.0 957.85 1408 N of GWI-BAl-01 Top of Sandstone B 11/15/2017 5.3 10.3 10.7 957.23 1409 N of GWI-BAl-01 Bottom of Sandstone B 11/15/2017 10.4 25.4 25.8 957.32 Facility Decommissioning Plan - Rev 2 February 2021 Page 1 of 1

Preparer: A. Anstaett; Date: 02/23/21 Table 2 Revision 2 Reviewer: E. Dulle; Date: 02/25/21 Monitor Well Inventory -T-Series Wells Screened Interval Date TD BGS TOC Elev Well Site Area Formation (BGS)

Installed Top Bottom (ft.) (ft. AMSL)

T-51 Western Alluvium Alluvium 4/1/2003 5.00 19.50 19.50 940.30 T-52 Western Alluvium Alluvium 4/2/2003 16.50 26.50 27 .00 938.98 T-53 Western Alluvium Alluvium 4/2/2003 12.00 27.00 27.00 938.49 T-54 Western Alluvium Alluvium 4/2/2003 6.00 15.50 16.00 940.11 T-55 Western Alluvium Alluvium 4/2/2003 6.00 15.50 16.00 938.57 T-56 Western Alluvium Alluvium 4/2/2003 5.00 14.50 15.00 937.76 T-57 Western Alluvium Alluvium 4/2/2003 4.00 19.00 19.50 939.31 T-58 Western Alluvium Alluvium 4/2/2003 5.00 19.50 20.00 939.88 T-59 Western Alluvium Alluvium 4/3/2003 7.00 26.00 27.00 938.00 T-60 Western Alluvium Alluvium 4/3/2003 7.00 26.50 27.00 937.84 T-61 Western Alluvium Alluvium 4/3/2003 5.00 24.50 25.00 937.94 T-62 Western Alluvium Alluvium 7/7/2003 4.80 19.30 19.80 941.16 T-63 Western Alluvium Alluvium 7/7/2003 8.80 23.30 23.80 940.51 T-64 Western Alluvium Alluvium 7/21/2003 7.50 17.00 17.50 943.54 T-65 Western Alluvium Alluvium 7/22/2003 7.50 22.00 22.50 941.06 T-66 Western Alluvium Alluvium 3/2/2004 10.00 29.50 30.00 940.03 T-67 Western Alluvium Alluvium 3/2/2004 9.00 28.50 29.00 940.55 T-68 Western Alluvium Alluvium 4/15/2004 7.30 27.30 27.80 939.92 T-69 Western Alluvium Alluvium 4/16/2004 7.00 26.50 27.00 940.09 T-70R Western Alluvium Alluvium 5/24/2004 8.00 27.50 28.00 940.98 T-72 Western Alluvium Alluvium 5/24/2004 8.00 27.50 28.00 939 .86 T-73 Western Alluvium Alluvium 5/25/2004 8.50 28.50 28.50 939.56 T-74 Western Alluvium Alluvium 5/25/2004 11.50 31.50 31.50 941.52 T-75 Western Alluvium Alluvium 5/25/2004 8.00 28.00 939.73 T-76 Western Alluvium Alluvium 5/26/2004 8.00 28.00 28.00 939.21 T-77 Western Alluvium Alluvium 5/26/2004 8.50 28.50 28.50 938.92 Decommissioning Plan - Rev 2 February 2021 Page 1 of 2

Preparer: A. Anstaett; Date: 02/23/21 Table 2 Revision 2 Reviewer: E. Dulle; Date: 02/25/21 Monitor Well Inventory - T-Series Wells Screened Interval Date TD BGS TOC Elev Well Site Area Formation (BGS)

Installed Top Bottom (ft.) (ft. AMSL)

T-78 Western Alluvium Alluvium 5/27/2004 8.00 28.00 28.00 939.22 T-79 Western Alluvium Alluvium 5/27/2004 7.00 27.00 27.00 938.31 T-81 Western Alluvium Alluvium 5/27/2004 8.00 28.00 28.00 939.59 T-82 Western Alluvium Alluvium 5/28/2004 8.00 28.00 28.00 940.80 T-83 Western Alluvium Alluvium 6/9/2005 6.00 26.00 26.00 939.51 T-84 Western Alluvium Alluvium 4/11/2011 3.00 27.50 28.00 939 .38 T-85 Western Alluvium Alluvium 4/11/2011 6.00 31.00 31.50 939.37 T-86 Western Alluvium Alluvium 4/11/2011 2.00 27.00 27.50 939.18 T-87 Western Alluvium Alluvium 4/12/2011 4.00 29.00 29.50 938.81 T-88 Western Alluvium Alluvium 4/12/2011 2.50 27.50 28.00 938.99 T-89 Western Alluvium Alluvium 4/12/2011 6.50 31.50 32.00 939.12 T-90 Western Alluvium Alluvium 4/12/2011 3.50 28.50 29.00 939.46 T-91 Western Alluvium Alluvium 9/30/2012 5.00 27.00 27.50 938.07 T-92R Western Alluvium Alluvium 12/5/2024 7.50 27.50 28.00 936.14 T-93 Western Alluvium Alluvium 5/8/2013 3.80 28.80 29.30 938.91 T-94 Western Alluvium Alluvium 5/8/2013 7.40 27.40 27.90 942.21 T-95 Western Alluvium Alluvium 5/8/2013 6.90 26.90 27.40 939.18 T-96 Western Alluvium Alluvium 5/8/2013 6.60 26.60 27.10 939.66 T-97 Western Alluvium Alluvium 12/4/2014 8.10 28.10 29 .50 941.55 T-98 Western Alluvium Alluvium 12/4/2014 8.66 28.66 29 .50 941.30 T-99 Western Alluvium Alluvium 12/4/2014 7.25 27.25 30.00 941.23 T-100 Western Alluvium Alluvium 12/8/2014 8.45 28.45 29.50 940.69 T-101 Western Alluvium Alluvium 12/5/2014 6.33 26.33 28.50 940.69 T-102 Western Alluvium Alluvium 12/5/2014 7.40 27.40 28.00 938.77 T-103 Western Alluvium Alluvium 12/5/2014 6.63 26.63 28 .00 939.52 Decommissioning Plan - Rev 2 February 2021 Page 2 of 2

Preparer: A. Anstaett; Date: 02/23/21 Table 2 Revision 2 Reviewer: E. Dulle; Date: 02/25/21 Monitor Well Inventory - TMW-Series Wells Screened Interval Date TD BGS TOC Elev Well Site Area Formation (BGS)

Installed Top Bottom (ft.) (ft. AMSL)

TMW-01 BA#l Sandstone B 8/13/1999 10.9 25.9 29 952.80 TMW-02 BA#l Sandstone B 8/17/1999 14.8 29.4 33 959.88 TMW-05 BA#l Transition Zone 8/9/1999 8.2 22.7 27 943.32 TMW-06 BA#l Transition Zone 8/17/1999 6.8 16.4 20 948.69 TMW-07 BA#l Transition Zone 8/26/1999 4.8 14.4 18 941.52 TMW-08 BA#l Sandstone B 8/26/1999 9.8 24.4 28 950.71 TMW-09 BA#l Transition Zone 8/30/1999 7.6 22.1 22 945.67 TMW-13 BA#l Alluvium 11/16/1999 8.5 18.5 21 939.97 TMW-17 BA#l Sandstone C 4/18/2000 36.0 46.0 49 948.78 TMW-18 BA#l Sandstone B 5/10/2000 11.0 18.0 20 941.34 TMW-19 BA#l Alluvium 4/17/2000 5.0 10.0 12 941.37 TMW-20 BA#l Sandstone B 5/5/2000 9.0 23.0 27 956.84 TMW-21 BA#l Sandstone B 5/9/2000 12.0 22.0 25 953.93 TMW-23 BA#l Sandstone C 5/17/2000 30.4 40.4 40 940.17 TMW-24 BA#l Alluvium 5/15/2000 15.5 25.5 29 939.09 TMW-25 BA#l Sandstone B 5/16/2000 9.0 23.5 27 954.44 Decommissioning Plan - Rev 2 February 2021 Page 1 of 1

Preparer: A. Anstaett; Date: 02/23/21 Table 2 Revision 2 Reviewer: E. Dulle; Date: 02/25/21 Monitor Well Inventory - Miscellaneous Wells Screened Interval Date TD BGS TOC Elev Well Site Area Formation (BGS)

Installed Top Bottom (ft.) (ft. AMSL)

GE-WA-01 Western Alluvium Alluvium 9/29/2012 4.5 27.0 27 944.08 MWWA-03 Western Alluvium Transition Zone 12/15/2005 9.0 14.0 14 947.53 MWWA-09 Western Alluvium Transition Zone 12/16/2005 7.5 12.5 12.5 947.70 TMP-UP2-01 S of GWI-UP2-01D? Sandstone A 11/20/2017 19.6 39.6 40 1002.40 TMP-UP2-02 N of GWI-UP2-01D? Sandstone A 11/17/2017 19.3 39.3 40 1002.52 TR-01 UPl Sandstone A 11/21/2017 19.8 29.8 30 987.15 TR-02 UPl Sandstone A 11/16/2017 15.1 25.1 25 997.68 TR-03 UPl Sandstone A 11/16/2017 16.4 26.4 26 986.56 TR-04 UP2 Sandstone A 11/2/2017 20.5 30.5 31 1003.20 TR-OS UP2 Sandstone A 11/6/2017 20.0 30.0 30 997.62 TR-06 BAl Sandstone B 10/13/2017 16.0 26.0 26 959.83 TR-07 BAl Sandstone B 10/10/2017 16.0 26.0 26 960.09 TR-08 BAl Transition Zone 10/20/2017 11.8 21.8 22 944.44 TR-09 BAl Transition Zone 10/20/2017 14.0 24.0 24 948.60 TR-10 BAl Transition Zone 10/20/2017 14.0 24.0 24 949.45 Decommissioning Plan - Rev 2 February 2021 Page 1 of 1

Preparer: E. Ah lemeyer; Date: 02/17/21 Table 5 Revision 0 Reviewer: E. Dulle; Date: 02/17/21 Project Transportation Emissions Estimate Total Project Emissions (tons)

Description Criteria Pollutants CO 2e NOx co voe PM 10 PM2.s SO 2 Construction engine emissions 6.93 1.87 0.54 0.30 0.29 0.00 322 Unpaved roads -- -- -- 65.79 6.58 -- --

Paved roads -- -- -- 4.37 1.07 -- --

Earthmoving -- -- -- 17.93 3.73 -- --

On-Road tailpipe 13.67 69.28 8.10 0.86 0.73 9.59E-02 6,037 Total emissions 20.60 71.15 8.65 89.25 12.41 0.10 6,359 Facility Decommissioning Plan - Rev 2 February 2021 Page 1 of 1

Preparer: J. Wilson; Date: 01/10/21 Reviewer: J. Luey; Date: 01/13/21 Table 8 Revision 0 Uranium Treatment Train Valve Arrangements WA TRAIN AT WATF Initial Second Third Vessel Vessel Vessel Sequence Sequence Sequence Lead Vessel VSL-101 VSL-102 VSL-103 Lag Vessel VSL-102 VSL-103 VSL-101 Polish Vessel VSL-103. VSL-101 VSL-102 VALVE ID VALVE POSITION I I I V-101 OPEN CLOSED CLOSED V-102 CLOSED OPEN CLOSED V-104 OPEN CLOSED OPEN V-105 OPEN OPEN OPEN V-106 CLOSED CLOSED OPEN V-108 OPEN OPEN CLOSED V-112 OPEN CLOSED CLOSED V-119 CLOSED OPEN CLOSED V-120 CLOSED CLOSED OPEN V-123 OPEN OPEN OPEN V-131 CLOSED OPEN OPEN V-132 OPEN OPEN OPEN Note: After the Third Sequence, the Valve Arrangement Restores the Initial Vessel Sequence, and the Process Starts Over.

Facility Decommissioning Plan - Rev.2 February 2021 Page 1 of 2

Preparer: J. Wilson; Date: 01/10/21 Reviewer: J. Luey; Date: 01/13/21 Table 8 Revision 0 Uranium Treatment Train Valve Arrangements BAl TRAIN AT WATF Initial Second Third Vessel Vessel Vessel Sequence Sequence Sequence Lead Vessel VSL-151 VSL-152 VSL-153 Lag Vessel VSL-152 VSL-153 VSL-151 Polish Vessel VSL-153 VSL-151 VSL-152 VALVE ID VALVE POSITION I I I V-150 CLOSED CLOSED OPEN V-151 OPEN CLOSED CLOSED V-152 CLOSED OPEN CLOSED V-153 OPEN OPEN OPEN V-154 OPEN CLOSED OPEN V-155 OPEN OPEN OPEN V-157 CLOSED CLOSED OPEN V-158 OPEN OPEN CLOSED V-159 OPEN OPEN OPEN V-162 OPEN CLOSED CLOSED V-169 CLOSED OPEN CLOSED V-180 CLOSED OPEN OPEN Note: After the Third Sequence, the Valve Arrangement Restores the Initial Vessel Sequence, and the Process Starts Over.

Facility Decommissioning Plan - Rev.2 February 2021 Page 2 of 2

Preparer: E. Ahlemeyer; Date: 01/19/21 Table 8 Revision 2 Reviewer: E. Dulle; Date: 01/28/21 In-Process Groundwater Monitoring Locations Remediation M on itoring 1 Plume Segment Uranium Nitrate Fluoride DTW Area Location 02W27 ---- ---- ---- Q 02W30 A ---- ---- Q 02W40 Q ---- ---- Q 02W41 A ---- ---- Q 02W42 A ---- ---- Q Sandstone B 02W47 ---- ---- ---- Q 1316R ---- ---- ---- Q TMW-01 A ---- ---- Q TMW-08 A ---- ---- Q BAl -A TMW-25 A ---- ---- Q 02W02 Q ---- ---- Q 02W03 Q ---- ---- Q 02W28 A ---- ---- Q 02W39 A ---- ---- Q Transition Zone 1315R Q ---- ---- Q 1404 Q ---- ---- Q 1405 Q ---- ---- Q TMW-07 A ---- ---- Q TMW-09 Q ---- ---- Q 02W04 A ---- ---- Q South of GE-BAl-02 02W32 Q ---- ---- Q TMW-13 Q ---- ---- Q 02W07 Q ---- ---- Q Nort h of GE-BAl-02 / 02W08 Q ---- ---- Q South of GE-BAl-03 02W14 A ---- ---- Q 02W19 Q ---- ---- Q BAl-B 02W18 A ---- ---- Q 02W37 A ---- ---- Q North of GE-BAl-03 /

02W38 A ---- ---- Q South of GE-BAl-04 02W44 Q ---- ---- Q 1410 Q ---- ---- Q 02W43 A ---- ---- Q North of GE-BAl-04 /

1361 Q ---- ---- Q South of GE-BAl-05 1411 Q ---- ---- Q Facility Decommissioning Plan - Rev 2 February 2021 Page 1 of 2

Preparer: E. Ahlemeyer; Date: 01/19/21 Table 8 Revision 2 Reviewer: E. Dulle; Date: 01/28/21 In-Process Groundwater Monitoring Locations Remediation Monitoring 1 Plume Segment Uranium Nitrate Fluoride DTW Area Location 1363 Q ---- ---- Q North of GE-BAl-05 /

BAl-C 1365 A ---- ---- Q South of GE-BAl-06 1412 Q ---- ---- Q IMWWA-09 Q Q Q Q 1206-NORTH I I MWWA-03 I Q I Q I Q I Q I T-62 Q Q Q Q T-63 Q Q A Q T-64 Q ---- Q Q T-65 Q Q A Q T-66 A Q A Q T-68 Q A ---- Q T-69 A Q ---- Q WAA U>DCGL T-72 Q A ---- Q T-75 A ---- ---- Q T-76 A A A Q T-77 A ---- ---- Q T-79 A ---- ---- Q T-84 A Q ---- Q T-104 Q A A Q T-105 Q A A Q 1351 Q Q ---- Q 1352 Q Q ---- Q 1356 Q A ---- Q WU-BA3 1358 ---- A ---- Q 1359 A A ---- Q 1360 A ---- ---- Q Notes:

1 Sampling and DTW measurement will be performed prior to startup, one month after startup, and on the first business day of each quarter thereafter.

-The quarterly analysis of specific COCs for groundwater samples collected at specific locations will be discontinued once the concentration of that COC is below the corresponding State Criterion for four consecutive quarters. Annual analysis will be discontinued once the COC concentration is below the corresponding State Criterion for two consecutive years.

COC - contaminant of concern DTW - depth to water Q - quarterly A - annually Facility Decommissioning Plan - Rev 2 February 2021 Page 2 of 2

Preparer: E. Lloyd; Date: 01/10/21 Reviewer: J. Luey; Date: 01/31/21 Table 8 Revision O In-Line Monitoring Flow Nitrate Instrument Process Sampled Material pH Appendix Drawing (gpm) (mg/L) ID Tank 101 Influent AE100 P115 SHT 1 - 01 (pre-acidification) X WA Train Influent X FIT100 P115 SHT 2 - 05 (post-acidification) X AE101 P115 SHT 2 - 05 Tank 105 BA 1 Influent WATF Ion Phase 1 AE130 P115 SHT 3- 02 Exchange K-3 (pre-acidification) X Phase 1 BA 1 Train Phase I X FIT150 P115 SHT 4 - 06 Influent X AE151 P115 SHT 4 - 05 (post-acidification)

Outfall 001 X FIT103 P115 SHT 5 - 05 X FIT1005 P200 C2 Nitrate System Influent X AE1010 P200 C2 WATF Tank A Influent X AE1055A P201 ES Biodenitrification K-5 Tank B Influent X AE1055B P201 CS Phase II X AE1100 P203 CS Nitrate System Effluent X AE1210A P207 CS Lead Vessel Influent P215 SHT 2 - E7 X AE200 (pre-acidification)

BA1 - Phase II Lead Vessel Influent X FIT 200 K-7 P215 SHT 2 - 05 (post-acidification) X AE201 P215 SHT 2 - 06 Outfall 002 - Phase II X FIT 202 P215 SHT 3 - 04 Note: "Sample IDs" are not required for real-time in-line measurements.

Defin itions: gpm - gallons per minute mg/L - milligrams per liter Facility Decommissioning Plan - Rev.2 February 2021 Page 1 of 1

Preparer: E. Lloyd ; Date: 01/10/21 Table 8 Revision 0 Reviewer: J. Luey ; Date: 01/31 /21 In-Process Treatment System Monitoring Weekly Sampling for Analysis Nitrate Fluoride pH U-235 & 238 Tc-99 by Process Sampled Material Sample ID by EPA by EPA Sample Port ID Appendix Drawing (field) by EPA 200.8 HASL300 353.2 300.0 WA Train Influent (pre-acid addition) WATF Pre Acid/51-1 X X X X X 51-1 PllS SHT 1- E6 WA Train Influent (post-acid addition) WATFl Post Acid/51-2 X 51-2 PllS SHT 1 - ES First Cycle WATFl Lead Eff/S1-3 X X 51-3 PllS SHT 2- D4 WA Train Lead Vessel Effluent Second Cycle WATFl Lead Eff/S1-4 X X 51-4 PllS SHT 2-D3 Phase I & 2- *.-**"',:.

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Preparer: E. Lloyd; Date: 01/10/21 Table 8 Revision 0 Reviewer: J. Luey; Date: 01/31/21 In-Process Treatment System Monitoring Weekly Sampling for Analysis Notes: Sam les to be collected the first business da of each week.

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• The WATF effluent will initially be sampled on a weekly basis; once consistent compliance with discharge criteria has been demonstrated, the WATF effluent sampling frequency will be reduced to semi-monthly (see Table 8-3c).

Note: If an ion exchange skid is installed at BA 1 for Phase II, the BA ion exchange skid at WATF may then be used to treat groundwater from the Western Area extraction wells.

Facility Decommissioning Plan - Rev.2 February 2021 Page 2 of 2

Preparer: E. Ahlemeyer; Date: 01 /19/21 Table 8 Revision 0 Reviewer: E. Dulle ; Date: 01 /27/21 In-Process Treatment System Monitoring Discharge Injection System Monitoring lnstrumenU Flow pH U-235/U-238 Nitrate Fluoride Location Sample ID Sample Port Appendix Drawing (gpm) by EPA 4500 by EPA 200.8 by EPA 300.0 by EPA 300.0 ID Western Area & X FIT-103 BA 1 Combined Outfall 001 P115 PHASE I J-3 Discharge X X X X S-WAE SHT5 - 05 GWI-BA1-01A X FT-2101 GWI-BA 1-02A X FT-2102 BA1 Injection 1-4 P105 GWI-BA 1-03A X FT-2103 All 3 Wells X X X X S-BAI Western Area X FT-1101 P104 GWI-WU-01A 1-4 Injection X X X X S-WAI P103 Notes: Discharge samples are collected on the first business day of the month and the first Lim its: pH - 6.5 - 9.0 standard units business day following the 14th day of the month. Uranium - 30 micrograms per liter Discharge monitoring reports to be submitted by the 15th of each month. Fluoride - 10 milligrams per liter Definitions: gpm - gallons per minute COC - contaminant of concern Facility Decommissioning Plan - Rev 2 February 2021 Page 1 of 1

Preparer: E. Lloyd; Date: 01 /10/21 Reviewer: J. Luey; Date: 01/31 /21 Table 8 Revision 0 In-Process Treatment System Monitoring Waste Characterization Sampling Sampled Material Sample ID I BA1-01-01 BA1-01-02 1st Batch of Spent Resin Phase I & II -

BA1-01-XX Resin Mixture from Treatment Skid for - - - - - - - - - - - - - - - -

BA1-02-01 the Burial Area #1 2nd Batch of Spent BA1-02-02 Resin BA1-02-XX WA1-01-01 WA1-01-02 Phase I -

1st Batch of Spent Resin Resin Mixture from the Treatment S k i d - - - - - - - - - - - - - - - -

for the Western Area WA1-01-XX WA1-02-01 2nd Batch of Spent WA1-02-02 Resin WA1-02-XX WA2-01-01 WA2-01-02 Phase II -

1st Batch of Spent Resin Resin Mixture from the 2nd Treatment - - - - - - - - - - - - - - - -

Skid for the Western Area (if required)

WA2-01-XX WA2-02-01 2nd Batch of Spent WA2-02-02 Phase II Biomass Resin WA2-02-XX Minimum of 1 Sample (If Biodenitrification per Consignment is Installed)

Notes: 1. All samples will be analyzed for U-235 & U-238 by EPA 200.8 and Tc-99 by HASL 300.

2. Once homogeneity of uranium in processed resin has been established, one sample per resin vessel will suffice for waste characterization.

3. Phase II: Both Tc-99 and uranium must be non-detectable for biomass solids to be disposed of as non-radioactive industrial waste.

Facility Decommissioning Plan - Rev.2 February 2021 Page 1 of 1

Preparer: E. Ahlemeyer; Date: 01 /19/2 1 Table 8 Revision 2 Reviewer: E. Dul le; Date: 01/27/21 Post-Remediation Groundwater Monitoring Locations Monitoring Area Location Uranium I Nitrate Fluoride 02W02 X BAl-A 02W28 X Transition Zone 1315R X r - - - - - - - - + - - - - - + - - -- -+--- -----t------fl TMW-09 X 02W08 X 02W19 X BAl-B 1410 X 02W43 X 1411 X BAl-C 11412 X IMWWA-03 X X X X 1206-NORTH MWWA-09 X X X X T-62 X X X T-104 X X X WAA U>DCGL T-105 X X X T-68 X X X X X WU-BA3 11351 1356 X 1360 X Notes:

1 If Tc-99 is< 900 pCi/L in the first four quarterly samples, analysis for Tc-99 will be discontinued.

2 Assurning all infraslruclure is inslalled, rnoniloring will be conducled at the monitoring locations in areas designated as part of Phase II.

Tc technetium-99 Facility Decommissioning Plan - Rev 2 February 2021 Page 1 of 1

Table 16 Revision 2 Preparer: B. Weis; Date: 02/26/21 Pre-Construction Cost Estimate Reviewer: J. Hesemann; Date: 02/26/21 Description 2021 2022 Ql-Q2 2023 1 Administration la EPM (Fee) $180,000 $180,000 $90,000 lb Outside Services $20,000 $20,000 $10,000 le EPM (Other Direct Costs) $16,000 $16,000 $8,000 2 License Compliance 2a EPM $160,000 $160,000 $80,000 2b Enercon $327,924 $377,113 $188,556 2c Burns & McDonnell $100,000 $80,000 $40,000 2d Annual Environmental $14,800 $14,800 $14,800 3 NRC Fees $800,000 $800,000 $400,000 4 Decommissioning 4a EPM $120,000 $120,000 $60,000 4b Burns & McDonnell D. Plan Revisions $100,000 RAI Responses $120,000 $50,000 $25,000 BAl Redox Evaluation $100,000 $100,000 $50,000 Site Maintenance $90,000 $80,000 $40,000 Final Design $380,000 $50,000 $30,000 Prepare Requests for Bids $110,000 Procurement (Bidding & Contracting) $140,000 $35,000 Project Execution Planning $120,000 $30,000 $20,000 Other (Permitting, Utilities, PM) $120,000 $70,000 $30,000 4c Enercon $205,391 $236,200 $118,100 Facility Decommissioning Plan - Rev 2 February 2021 Page 1 of 2

Table 16 Revision 2 Preparer: B. Weis; Date: 02/26/21 Pre-Construction Cost Estimate Reviewer: J. Hesemann; Date: 02/26/21 Description 2021 2022 Q1-Q2 2023 4d Veolia D. Plan Revisions $70,000 RAI Responses $246,308 Final Design $352,154 $391,000 Prepare Requests for Bids $151,640 Response to RFls (Bidding) $122,000 Procurement (Final negotiations & Award) $121,000 5 ODEQ Agency Fees Sa ODEQ Fees (includes OPDES Permit Fees) $36,000 $36,000 $18,000 6 Total Preconstruction Phase Costs $3,680,598 $3,214,775 $1,500,456

• Pre-construction phase costs shown are estimated funds to be incurred from January 1, 2021 through June 31, 2023.

Facility Decommissioning Plan - Rev 2 February 2021 Page 2 of 2

Table 16 Revision 2 Preparer: B. Weis; Date: 02/26/21 Construction Cost Estimate Reviewer: J. Hesemann; Date: 02/26/21 Item Description Q3-Q4 2023 Ql 2024 1 Administration la EPM $90,000 $45,000 lb Outside Services - BMcD, legal support $10,000 $5,000 le Other Direct Costs $8,000 $4,000 2 License Compliance 2a EPM $100,000 $50,000 2b Enercon $326,812 $163,406 2c Burns & McDonnell $40,000 $20,000 3 NRC Fees $150,000 $75,000 4 Decommissioning 4a EPM Support $70,000 $35,000 4b Enercon Support $118,100 $59,050 4c Veolia Support Construction & Fabrication Support $415,000 Startup Support $142,000 4d Burns & McDonnell Support Site Maintenance $40,000 $20,000 Other (Utilities, PM) $30,000 $25,000 4e Burns & McDonnell Capital Construction Costs i Site Civil Injection & Extraction Wells and Trenches $369,392 $717,054 Piping & Utilities $718,345 $1,394,433 Injection Skids $94,100 $182,665 Other Site Civil (Roads, Drainage, Erosion, Restoration, Survey, etc.) $501,164 $972,847 ii Site Electrical and Controls $366,520 $711,480 iii BAl Facility BAl Facility Civil $45,260 $87,857 Balance of BAl Facility $240,058 $123,666 iv WA Treatment Facility WA Treatment Facility Civil $121,240 $235,348 Ion Exchange Skids (2) $2,042,656 Resin Processing Equipment $379,259 $195,376 Facility Decommissioning Plan - Rev 2 February 2021 Page 1 of 2

Table 16 Revision 2 Preparer: B. Weis; Date: 02/26/21 Construction Cost Estimate Reviewer: J. Hesemann; Date: 02/26/21 Item Description Q3-Q4 2023 Ql 2024 Balance of WA Treatment Facility $2,228,113 $1,147,816 v Startup $238,590 vi Direct Capital Construction Costs Subtotal $7,106,106 $6,007,133 vii General Conditions/ CM (25%) $1,776,526 $1,501,783 viii Engineering During Construction (10%) $710,611 $600,713 ix Bonds & Permits (1%) $72,000 $61,000 X Indirect Captial Construction Costs Subtotal $2,559,137 $2,163,497 xi Total Capital Construction Cost $10,245,157 $8,660,868 5 ODEQ Agency Fees Sa ODEQ Fees (includes OPDES Permit Fees) $16,000 $8,000 6 Total Construction Phase Costs $11,659,069 $9,312,324

• Facility costs include equipment not specifically listed such as foundations, pavement, earthwork, etc.

Facility Decommissioning Plan - Rev 2 February 2021 Page 2 of 2

Table 16 Revision 2 Preparer: B. Weis; Date: 02/26/21 Groundwater Remediation Cost Estimate Reviewer: J. Hesemann; Date: 02/26/21 Item Description Q2-Q4 2024 2025 2026 2027 2028 2029 2030 2031 1 Administration la EPM Fee $135,000 $180,000 $180,000 $180,000 $180,000 $180,000 $180,000 $180,000 lb Outside Services - BMcD, legal support $15,000 $20,000 $20,000 $20,000 $20,000 $20,000 $20,000 $20,000 le Other Direct Costs $12,000 $16,000 $16,000 $16,000 $16,000 $16,000 $16,000 $16,000 2 License Compliance 2a EPM $150,000 $170,000 $160,000 $160,000 $160,000 $160,000 $160,000 $160,000 2b Enercon $477,298 $636,397 $636,397 $636,397 $636,397 $636,397 $636,397 $636,397 2c Burns & McDonnell $60,000 $80,000 $80,000 $80,000 $80,000 $80,000 $80,000 $80,000 3 NRC Fees $300,000 $280,000 $240,000 $240,000 $240,000 $240,000 $240,000 $240,000 4 Decommissioning 4a EPM Support $105,000 $125,000 $120,000 $120,000 $120,000 $120,000 $120,000 $120,000 4b Remediation/ Treatment Labor and Support $411,117 $548,156 $548,156 $548,156 $548,156 $548,156 $548,156 $548,156 4c Treatment Facility Electric $89,316 $119,090 $119,090 $119,090 $119,090 $119,090 $119,090 $119,090 4d IX Resin $94,491 $94,491 $70,868 $82,680 $70,868 $70,868 $70,868 $82,680 4e 6M HCI - Uranium System pH Adjustment $42,343 $42,343 $42,343 $42,343 $42,343 $42,343 $42,343 $42,343 4f Spent Resin Disposal $128,755 $128,755 $103,718 $117,071 $103,718 $103,718 $103,718 $117,071 4g Maintenance Allowance (Burns & McDonnell) $60,000 $80,000 $80,000 $80,000 $80,000 $80,000 $80,000 $80,000 4h In-Process Groundwater Monitoring $19,304 $25,738 $25,738 $25,738 $25,738 $25,738 $25,738 $25,738 4i In-Process Treatment Monitoring $111,596 $148,794 $148,794 $148,794 $148,794 $148,794 $148,794 $148,794 4j Post-Remediation Groundwater Monitoring 4k Final Status Survey Plan 41 Final Status Survey 4m Final Status Survey Report 4n License Termination 5 ODEQ Fees Sa ODEQ Fees (includes OPDES Permit Fees) $27,000 $36,000 $36,000 $36,000 $36,000 $36,000 $36,000 $36,000 6 Total Year Operational Phase Costs $2,238,220 $2,730,764 $2,627,105 $2,652,269 $2,627,105 $2,627,105 $2,627,105 $2,652,269 Facility Decommissioning Plan - Rev 2 February 2021 Page 1 of 3

Table 16 Revision 2 Preparer: B. Weis; Date : 02/26/21 Groundwater Remediation Cost Estimate Reviewer: J. Hesemann; Date : 02/26/21 Item Description 2032 2033 2034 2035 Ql-Q3 2036 Q4 2036 I 2037 2038 Ql-Q3 2039 1 Administration la EPM Fee $180,000 $180,000 $180,000 $180,000 $135,000 $45,000 $180,000 $180,000 $135,000 lb Outside Services - BMcD, legal support $20,000 $20,000 $20,000 $20,000 $15,000 $5,000 $20,000 $20,000 $15,000 le Other Direct Costs $16,000 $16,000 $16,000 $16,000 $12,000 $4,000 $16,000 $16,000 $12,000 2 License Compliance 2a EPM $160,000 $160,000 $160,000 $160,000 $120,000 $50,000 $200,000 $200,000 $150,000 2b Enercon $636,397 $636,397 $636,397 $636,397 $477,298 $81,981 $327,924 $327,924 $245,943 2c Burns & McDonnell $80,000 $80,000 $80,000 $80,000 $60,000 $10,000 $40,000 $40,000 $20,000 3 NRC Fees $240,000 $240,000 $240,000 $240,000 $180,000 $50,000 $200,000 $200,000 $150,000 4 Decommissioning 4a EPM Support $120,000 $120,000 $120,000 $120,000 $90,000 $35,000 $140,000 $140,000 $105,000 4b Remediation/ Treatment Labor and Support $548,156 $548,156 $548,156 $548,156 $411,117 4c Treatment Facility Electric $119,090 $119,090 $119,090 $119,090 $59,544 4d IX Resin $70,868 $70,868 $70,868 $82,680 $35,434 4e 6M HCI - Uranium System pH Adjustment $42,343 $42,343 $42,343 $42,343 $42,343 4f Spent Resin Disposal $103,718 $103,718 $103,718 $117,071 $63,660 4g Maintenance Allowance (Burns & McDonnell) $80,000 $80,000 $80,000 $80,000 $80,000 $20,000 $80,000 $80,000 $60,000 4h In-Process Groundwater Monitoring $25,738 $25,738 $25,738 --

$25,738 $19,304 4i In-Process Treatment Monitoring $148,794 $148,794 $147,799 $147,467 $110,600 4j Post-Remediation Groundwater Monitoring $5,275 $21,100 $21,100 $15,825 4k Final Status Survey Plan $21,995 $7,332 41 Final Status Survey $14,600 $43,801 4m Final Status Survey Report $28,801 4n License Termination 5 ODEQ Fees Sa ODEQ Fees (includes OPDES Permit Fees) $36,000 $36,000 $36,000 $36,000 $27,000 $8,000 $32,000 $32,000 $24,000 6 Total Year Operational Phase Costs $2,627,105 $2,627,105 $2,626,110 $2,650,942 $1,938,299 $314,256 $1,279,019 $1,278,956 $1,005,370 Facility Decommissioning Plan - Rev 2 February 2021 Page 2 of 3

Table 16 Revision 2 Preparer: B. Weis; Date: 02/26/21 Groundwater Remediation Cost Estimate Reviewer: J. Hesemann; Date: 02/26/21 Life of Project Item Description Q4 2039 Q1-Q3 2040 Subtotal/ Total 1 Administration la EPM Fee $45,000 $135,000 $2,970,000 lb Outside Services - BMcD, legal support $5,000 $15,000 $330,000 le Other Direct Costs $4,000 $12,000 $264,000 2 License Compliance 2a EPM $25,000 $75,000 $2,740,000 2b Enercon $81,981 $245,943 $9,266,655 2c Burns & McDonnell $10,000 $30,000 $1,150,000 3 NRC Fees $60,000 $180,000 $4,000,000 4 Decommissioning 4a EPM Support $25,000 $75,000 $2,040,000 4b Remediation/ Treatment Labor and Support $6,851,950 4c Treatment Facility Electric $1,458,850 4d IX Resin $968,535 4e 6M HCI - Uranium System pH Adjustment $550,459 4f Spent Resin Disposal $1,398,412 4g Maintenance Allowance (Burns & McDonnell) $20,000 $60,000 $1,340,000 4h In-Process Groundwater Monitoring $321,726 4i In-Process Treatment Monitoring $1,856,608 4j Post-Remediation Groundwater Monitoring $63,300 4k Final Status Survey Plan $29,327 41 Final Status Survey $58,401 4m Final Status Survey Report $9,600 $38,401 4n License Termination $58,701 $58,701 5 ODEQ Fees Sa ODEQ Fees (includes OPDES Permit Fees) $10,000 $30,000 $586,000 6 Total Year Operational Phase Costs $295,581 $916,644 $38,341,325 Facility Decommissioning Plan - Rev 2 Page 3 of 3 February 2021

Preparer: B. Weis; Date: 02/26/21 Table 16 Revision 2 Reviewer: J. Hesemann; Date: 02/26/21 Decommissioning Cost Estimate Summary Item Description 2024 2025 2026 2027 2028 2021 2022 2023

$ 216,000 $ 216,000 $ 216,000 $ 216,000 $ 216,000 $ 216,000 $ 216,000 $ 216,000 1 Administration 2 License Compliance Is 602,724 $ 631,913 $ 790,168 $ 920,104 Is 886,397 $ 876,397 $ 876,397 $ 876,397 I  !'

$ 800,000 $ 800,000 $ 550,000 $ 375,000 $ 280,000 $ 240,000 $ 240,000 $ 240,000 3 NRC Fees li 4 Decomissionin g $ 2,025,874 $ 1,530,862 $ 11,569,357 $ 10,003,840  !$ 1,312,367 $ 1,258,708 $ 1,283,872 $ 1,258,708

! 'l l 5 ODEQ Fees $ 36,000 $ 36,ooo Is 34,000 j $ 35,000 i$ 36,000 $ 36,000 $ 36,000 $ 36,000 I

I I I 6 Total Year Cost (in 2021 Dollars) $ 3,680,598 $ 3,214,ns I$ 13,159,525 i$ 11,sso,s44 I$ 2,730,764 $ 2,627,105 $ 2,652,269 $ 2,627,105 Facility Decommission ing Plan - Rev 2 Page 1 of 3 February 2021

Table 16 Revision 2 Preparer: B. Weis; Date: 02/26/21 Decommissioning Cost Estimate Summary Reviewer: J. Hesemann; Date: 02/26/21 Item Description ._. H,~H.Y.V.-

~~,.,,,=v.

2029 2030 2031 2032 2033 2034 2035 2036 2037 1 Administration $ 216,000 $ 216,000 $ 216,000 $ 216,000 $ 216,000 $ 216,000 $ 216,000 $ 216,000 $ 216,000 2 License Compliance $ 876,397 $ 876,397 $ 876,397 $ 876,397 $ 876,397 $ 876,397 $ 876,397 $ 799,279 $ 567,924 3 NRC Fees $ 240,000 $ 240,000 $ 240,000 $ 240,000 $ 240,000 $ 240,000 $ 240,000 $ 230,000 $ 200,000 4 Decomissioning $ 1,258,708 $ 1,258,708 $ 1,283,872 $ 1,258,708 $ 1,258,708 $ 1,257,713 $ 1,282,545 $ 972,277 $ 263,095

! l 5 ODEQ Fees $ 36,000 $ 36,000 $ 36,000 $ 36,ooo Is 36,000 $ 36,000 $ 36,000 1 $ 35,000 $ 32,000 6 :Total Year Cost (in 2021 Dollars) $ 2,627,105 $ 2,627,105 $ 2,652,269 $ 2,621,1os I$ 2,627,105 $ 2,626,110 I$ 2,650,942 $ 2,252,555 $ 1,279,019 Facility Decommissioning Plan - Rev 2 February 2021 Page 2 of 3

Table 16 Revision 2 Preparer: B. Weis; Date: 02/26/21 Decommissioning Cost Estimate Summary Reviewer: J. Hesemann; Date: 02/26/21 Life of Project Item Description 2038 2039 2040 Subtotal/ Total 1 Administration $ 216,000 $ 216,000 $ 162,000 $ 4,266,000 2 License Compliance $ 567,924 $ 532,924 $ 350,943 $ 15,414,866 3 NRC Fees $ 200,000 ; $ 210,000 $ 180,000 $ 6,225,000 i

4 Decomissioning $ 263,032 . $ 308,027 $ 193,701 $ 41,102,682 I

s ODEQ Fees $ 32,000 $ 34,000 $ 30,000 $ 700,000 6 Total Year Cost (in 2021 Dollars) $ 1,278,956 ; $ 1,300,951 $ 916,644 $ 67,708,547 Contingency 25%: $16,927,137 Project Cost with Contingency in 2021 Dollars: $84,635,684 Facility Decommissioning Plan - Rev 2 February 2021 Page 3 of 3