Text

Cimarron Environmental Response Trust Facility Decommissioning Plan, Revision 2, Tables, Domestic Water Wells Near the Cimarron Site, Part 1
	ML21076A474
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Site:	07000925
Issue date:	02/26/2021
From:	; Environmental Properties Management, Enercon Services, Burns & McDonnell Engineering Co, Veolia Nuclear Solutions Federal Services
To:	; Office of Nuclear Material Safety and Safeguards, Cimarron Environmental Response Trust, NRC Region 4
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Preparer: D. Horne; Date: 02/1 5/2 1 Table 2 Revision 2 Reviewer: E. Dulle; Date: 02/1 5/21 Domestic Water Wells Near the Cimarron Site

{As of February 2021}

Well ID I Township I Range I Sect. I 10-acre Latitude I Longitude I Owner 1516681I 16N I 3 I 6 i SW-NW-NW i I I 35.8966 iI -97

56652 le I Porter

-------------T-------------T---------r---------r----------------r----------------r----------------r----------------------------------*

9908l 16N l 3 l 7 l SW-SW-NW l 35.879282l -97.566526l Not Avail.

t-------------t---------~--------+---------------+---------------+----------------r-----------------------------------

9909: 16N : 3 : 7 : SE-SW-NE : 35.879282: -97.555374:B. Williams

t-------------t---------~--------+---------------+---------------+---------------+----------------------------------- -

31196: 16N : 3 : 7 : NE-NE-NW : 35.884704: -97.559835:Wayne Mongotmery

+-------------+---------r---------+-----------------+-----------------+-----------------+------------------------------------ -

36001! 16N ! 3 ! 7 ! SE-SE-NE ! 35.879282! -97.550914!VAN FREE

-------------T-------------T---------r---------r----------------r----------------r----------------r----------------------------------*

90185l 16N : 3 : 7 : SW-SW-SW : 35.872054l -97.566525lLancaster

+-------------+---------~--------+---------------+---------------+---------------+-----------------------------------

109628: 16N : 3 : 7 : NE-SE-NE : 35.881089: -97.550914: MARLA PEEK

~-------------~---------~---------"-----------------"-----------------"-----------------'------------------------------------

109629! 16N ! 3 ! 7 ! NE-SE-NE ! 35.881089! -97.550914! MARLA PEEK

+-------------+---------r---------+-----------------+-----------------+-----------------+-----------------------------------* .

180261! 16N ! 3 ! 7 ! SE-NW-NE ! 35.88261 ! -97.55473 !Paul Bartholomew

r-------------r---------r---------r---------------,-----------------r----------------r----------------------------------*

9910l 16N : 3 : 8 : NE-NW-NE : 35.884704: -97.537427: Mr. & Mrs. Fabuion

t-------------t---------~--------+---------------+---------------+---------------+----------------------------------- -

9911: 16N : 3 : 8 : SW-NE-NE : 35.882897: -97.535197:Tom Stults

~-------------~---------~---------"-----------------'----------------------------------'------------------------------------ -

61569! 16N ! 3 ! 8 ! NW-NE-NE ! 35.884704! -97.535197:Steve Sheffield

+-------------+---------r---------r----------------r----------------r----------------r----------------------------------* -

_____ 138552 i____ 16N ----i--- 3----~--- 8---~--NE-NE-NE -~- 35.885083 -~--97.533867 -!-ROY NELSON---------------------

79203: 16N : 3 : 17 : SW-NE-NW : 35.868357: -97.544238:Marvin Quinn

t-------------t---------~--------+---------------+---------------+---------------+----------------------------------- -

90910: 16N : 3 : 17 : SW-NE-NW : 35.868357: -97.544238:Robert Hood

+-------------+--------- -----------------------------------------------------------------------------------------------* -

96351 ! 16N ! 3 ! 17 ! NE-SE-NE ! 35.867 ! -97 .533367 ! Brent Moroney

-------------T-------------+---------r---------r----------------r----------------r----------------r----------------------------------* -

_____ _!!~-~~-~i----~-~~----i----~----~---!.?.. __ ~ __ ,?_~:?~:-~~--~---3-~:~.?..?.?..~~~--:~_?:~.?..~.§.~?-~~~~-!-~~!P.. _______________________ _

124188: 16N : 3 : 17 : SE-NE-SE : 35.860733: -97.532717: Richardson Homes

t-------------t---------~--------+---------------+---------------+---------------+-.--------------------------------* -

174735: 16N : 3 : 17 : SE-SE-SE : 35.8577 : -97.53419 :Kirk Keller

+-------------+--------- ---------+-----------------+-----------------+-----------------+------------------------------------ -

9915! 16N ! 3 ! 18 ! SE-SW-SE ! 35.857519! -97.555373 ! Duffy Martin

r-------------r---------r---------r----------------r----------------r----------------r----------------------------------* -

9916l 16N : 3 : 18 l SE-SE-NE : 35.864748l -97.550913lBill Ellis

+-------------+---------~--------+---------------+---------------+--------------

32572 l 16N : 3 : 18 : NW-SE-SW :

7 ----------------------------------- -

35.859326: -97 .562063 l RC Vannostrand

~-------------~---------~---------'-----------------'-----------------'-----------------'------------------------------------ -

38607! 16N ! 3 ! 18 ! SW-NW-NW ! 35.868362! -97.566523! BRIAN SUM EARLL WELL #19

+-------------+---------r---------+-----------------+-----------------r----------------r----------------------------------* -

197831! 16N ! 3 ! 18 ! SE-SE-SE ! 35.85842 ! -97.55166 !Greg Ireton

r-------------r---------r---------r---------------,-----------------r----------------r----------------------------------* -

36002l 16N : 3 : 19 : SE-SE-NE : 35.850308: -97.550917lCHAD CHERRY

t-------------t---------~--------+---------------+---------------+---------------+----------------------------------- -

127541: 16N : 3 : 19 : SE-NW-NE : 35.8544: -97.55555:conrad

~-------------+--------- ------------------------------------------------------------'-----------------------------------* -

134152! 16N ! 3 ! 19 ! NE-SE-NE ! 35.852517! -97.551017:michelle Facility Decommissioning Plan - Rev 2 February 2021 Page 1 of 3

Preparer: D. Horne; Date: 02/15/21 Table 2 Revision 2 Reviewer: E. Dulle; Date: 02/15/21 Domestic Water Wells Near the Cimarron Site (As of February 2021}

Well ID I Township I Range I Sect. I 10-acre Latitude I Longitude I Owner 23135! 16N , 4 , 1 , NE-NE-NW , 35.898858! -97 .57722:Jerry Babb

*-------------+--------- ---------+-----------------+-----------------+-----------------+------------------------------------ -

31202: 16N ! 4 ! 1 ! _______________

r-------------T---------r--------"T" NW-NW-NE "T"! _______________

35.898858!"T" _______________

-97.57499:Jim Crowley "T" ___________________________________

89969: 16N : 4 : 1 : SW-SW-NE : 35.894053: -97.57499:NotAvailable

*-------------+---------~--------+---------------+---------------+--------------* ----------------------------------- -

38802: 16N : 4 : 2 : NW-NW-SW: 35.892173: -97.601725:CIMARRON APPALOOSA

-------------*-------------~---------L---------'-----------------'-----------------'----------------..1...----------------------------------* "

100123: 16N ! 4 ! 2 ! SE-SE-SW ! 35.8875: -97.594:Wayn Tompson

*-------------+--------- ---------+-----------------+-----------------+------- ----------+------------------------------------ -

110569: 16N ! 4 ! 2 ! NE-SE-SW ! 35.8879: -97.594167:Ed Lehr

r-------------T---------r--------"T"---------------"T"----------------r----------------,------------------------------------

129268: 16N : 4 : 2 : NW-SW-SE : 35.8878: -97.59354:Trace OIL

*-------------+---------~---------'-----------------'----------------+---------------+----------------------------------- -

180879: 16N : 4 : 2 ! NW-NW-SW! 35.89285: -97.60211:chris wheeler

-------------*-------------~---------L--------..1...----------------'----------------..L..---------------..L..----------------------------------* "

146005 ! 16N ! 4 ! 2 ! NW-SW-SE ! 35.88859 ! -97 .59377 ! Brent Gregory

~-------------+---------~---------t-----------------t-----------------+-----------------t------------------------------------ -

141974! 16N ! 4 ! 2 ! NW-SE-SE ! 35.88935! -97.58829:Summit Ranch

r-------------T---------r---------,-----------------.----------------,-----------------,------------------------------------

144812: 16N : 4 : 2 : NW-SW-NE : 35.89632 : -97.5927 :Rick Klein

t-------------t---------~--------+---------------+---------------+---------------+------------. --------------------- -

44811: 16N : 4 : 3 : NW-NE-SE : 35.892164: -97.606289:Veldon Zollinger Inc.

*-------------+--------- --------..&..----------------+-----------------+-----------------+------------------------------------ -

90924: 16N ! 4 ! 3 ! SE-NE-SE ! 35.890357: -97.604059:Thad Kinney

r-------------+---------r---------+----------------"T"----------------+----------------"T"----------------------------------- -

108469: 16N : 4 : 3 : SE-NE-SE : 35.89: -97.603Uerry A Payne

*-------------+---------~--------+---------------+---------------+---------------+----------------------------------- -

176245: 16N : 4 : 3 : NW-SE-SE : 35.88861: -97 .60667:2nd Hand Stare

-------------*-------------~---------L--------..L----------------L----------------L----------------L----------------------------------* .

76641! 16N ! 4 ! 12 ! SW-SW-SW ! 35.872182! -97.583914:Cimarron Corp/Kerr McGee Corp

*-------------+--------- ---------+-----------------+-----------------+-----------------+--------------------------------------*

87548! 16N ! 4 ! 12 ! SW-SW-SW ! 35.872182! -97.583914:Cimarron Corp/Kerr McGee Corp

r-------------T---------r--------"T"---------------"T"----------------r----------------r------------------------------------

150878: 16N : 4 : 12 : SW-SE-SE : 35.8722: -97.57151:Kenny Wood

*-------------+---------~--------+---------------+---------------+----------------r----------------------------------- -

197582: 16N : 4 : 12 : NE-SE-SE : 35.87391: -97.56771:Terry Swinford

-------------*-------------~---------L--------..L----------------L---------------..L---------------..L----------------------------------*

143552: 16N ! 4 ! 13 ! NE-NW-SW ! 35.86331 ! -97 .58282 ! Efrain Huerta

~-------------+---------~---------+-----------------+-----------------+-----------------+------------------------------------ -

9928: 16N ! 4 ! 14 ! SE-SW-SW ! 35.857697: -97.599501:Ben Ellis

r-------------T---------r---------r----------------,-----------------r----------------,------------------------------------ -

83070: 16N : 4 : 24 : NE-SW-SW : 35.845014: -97.581737!Mark Dees Facility Decommissioning Plan - Rev 2 February 2021 Page 2 of 3

Preparer: D. Horne; Date: 02/15/21 Table 2 Revision 2 Reviewer: E. Dulle; Date: 02/15/21 Domestic Water Wells Near the Cimarron Site (As of February 2021}

I Well ID I Township I Range I Sect. I 10-acre I Latitude I Longitude I Owner 146003! 17N ! 3 ! 30 ! SW-NW-SW ! 35.91746: -97.56775:John Kellog

+-------------+--------- -------------------------------------------------------------------------------------------*

142888: 17N ! 3 ! 30 ! NW-NW-SW! 35.91944! -97.56769:J

-------------T-------------T---------r--------"T" _______________ "T" _______________ "T" _______________ Keloog "T" __________________________________ ,

146002l 17N l 3 : 30 : SW-NW-SW : 35.91803: -97.56745:John Kellog

*-------------+---------~--------+---------------+-

3

+-------------- *----------------------------------*

l 30 : NE-NW-SW : 35.92013 l -97.56529 lJ Kelloog 169762: 17N :

~-------------~---------~---------'-----------------'-- ---------------'-----------------'-----------------------------------*

137644! 17N ! 3 ! 30 ! NE-NW-SW ! 35.91976 ! -97.5645 !John Kellog

+-------------+--------- -------------------------+-------------------------------------------------------------------*

137643! 17N ! 3 ! 30 ! SE-NW-SW ! 35.91843 ! -97.56444 !John Kellog 45177! 17N ! 4

-------------T-------------T---------r--------"T" SW-SW-SW "T"! _______________

! 25 ! _______________ -97.585097:Ed 35.914116!"T" _______________ Stanton "T" __________________________________ ,_

137647l 17N l 4 l 25 l SW-NW-SW : 35.91826 l -97.58573 : P Mc Vicker

*-------------+---------~--------+---------------+-

4 : 26 l NE-NE-NE :

+---------------+----------------------------------*

35.92664l -97.58718:Greg Williams 123592: 17N l

t-------------t---------~--------+---------------+---------------+---------------+--------- .------------------------*

129452: 17N : 4 : 26 l SW-SW-SE l 35.91371: -97.5933:Bob Heflin

-------------+--------- -------------------------------------------------------------------------------------------*

151667! 17N ! 4

-------------T-------------T---------r--------"T" NE-NE-SW "T"! _______________

! 26 ! _______________ -97.59653:J 35.92005!"T" _______________ Henrey "T" __________________________________ ,

153649l 17N l 4 l 26 l NE-SE-NW : 35.92365 l -97.59699 : Doug Lacey

t-------------+---------~--------+---------------+-

4 : 34 : NW-SW-SW l

+----------------r----------------------------------*

35.901324l -97.620669:Not Avail.

9563: 17N :

~-------------~---------~---------'-----------------'-!

35.90317: -97.589429:Conveying System & Mfg 9981! 17N ! 4 ! 35 ! SW-NE-SE

~-------------+--------- ---------+-----------------+-------------------------------------------------------------------*

22659! 17N ! 4

r-------------T---------r--------"T" NE-SW-SE "T"! _______________

! 35 ! _______________ -97.59166:Jerry 35.901363!"T" _______________ Corteway "T" __________________________________ ,

109655l 17N : 4 : 36 : NW-SW-SE : 35.9005: -97.575167:Jim Crowley

t-------------t---------~--------+---------------+---------------+---------------+----------------------------------*

109656: 17N : 4 : 36 : NW-SW-SE l 35.9005: -97.575167:Jim Crowley

~-------------~---------~---------'-----------------'-

! 4 ! 36 ! SE-SW-SE !

35.899: -97.57478:jim crowley 125433! 17N Notes:

Sect. - Section "Well ID" assigned by Oklahoma Water Resources Board Facility Decommissioning Plan - Rev 2 February 2021 Page 3 of 3

Preparer: D. Horne; Date: 02/15/21 Table 2 Revision 2 Reviewer: E. Dulle; Date: 02/15/21 Oil/Gas Wells Near the Cimarron Site (As of February 2021}

I Operator API Number Well Name Well No. Well Type SEC TWP RNG Quarter Section Number I I Abandoned Wells 3508322103 22182 JECH 1-35 35 17N 04W C-NE4-NW4-SW4 3508324273 23535 WIGEON 1-9H DRY 04 16N 03W SW-SE-SW-SW 3508320000 23358 DATIN 16-3-7 lHM OIL 16N 3W 16 NE-NE-NW-NW Active Wells 3508323995 23535 DAVIS FARMS 1-5 SWD 2DNC 05 16N 3W SW-SE-SW-SW 3508321337 7250 STUBBLEFIELD 1 OIL 07 16N 3W C-NE-SW 3508323211 19961 BUGG 1-7 OIL 07 16N 3W N-S-SE 3508323822 7250 MCKAIG 1 OIL 07 16N 3W C-S-SW-NE 3508323350 7250 STUBBLEFIELD 3 OIL 07 16N 3W C-NE-SW-SW 3508322932 19586 POPE 1-18 OIL 18 16N 3W NW-NE-NE 3508323917 22501 LIBERTY 1-18 OIL 18 16N 3W W-NE-SE-NE 3508322871 19961 BUGG 1-7 OIL 07 16N 3W SE-SE-SE 3508323359 21316 HARRIS 1 2DCm 13 16N 04W C-NW-NE 3508323778 17042 GERALD 1-24 GAS 24 17N 04W C-S2-SE-SE 3508323943 22501 LIBERTY 2-18 2DCm 18 16N 03W SW-NE-SW-NE 3508323974 23535 WOLF 1-29H OIL 29 17N 03W NE-SE-NW-NW 3508323974 23535 WOLF 1-29H OIL 29 17N 03W E2-SE-SW-SW 3508323998 23535 DAVIS FARMS 2-5H OIL 05 16N 03W S2-S2-SW-SW 3508323998 23535 DAVIS FARMS 2-5H OIL 05 16N 03W C-NW-NW 3508324004 23030 MCPHAIL 1-31H OIL 31 17N 03W SE-SW-SE-SE 3508324004 23030 MCPHAIL 1-31H OIL 31 17N 03W NW-NW-NE-NE 3508324024 22501 DUFFY 1-18 GAS 18 16N 03W NW-NW-NE-SE 3508324026 24435 ROTHER 16-4-11 lSWD 2DNC 11 16N 04W SW-SW-SE-SW 3508324042 23030 LOVE 1-31H OIL 31 17N 03W NW-NE-NW-NW 3508324054 23030 TONTZ 1-32H OIL 32 17N 03W N2-N2-NE-NE 3508324057 24432 ROTHER 16-4-11 2HM OIL 11 16N 04W SW-SW-SE-SW 3508324092 24432 FRICK 16-4-13 lHW OIL 13 16N 04W NW-NE-NW-NW 3508324094 23030 SNIPE 1-30H OIL 30 17N 03W NW-NW-NW-NW 3508324121 23030 TONTZ 2-29-32H OIL 32 17N 03W SW-SW-SE-SW 3508324121 23030 TONTZ 2-29-32H OIL 29 17N 03W NW-SW-SE-SW 3508324168 23535 TOUCAN 1-24H OIL 25 17N 04W NE-NE-NE-NE 3508324168 23535 TOUCAN 1-24H OIL 24 17N 03W NW-NE-NE-NE 3508324187 23030 GREGORY 1-10-3H OIL 10 17N 04W NE-NE-NE-NW 3508324187 23030 GREGORY 1-10-3H OIL 03 17N 04W NE-NE-NE-NW 3508324203 23535 WIGEON 1-4H OIL 04 16N 03W NE-NW-NW-NW 3508324203 23535 WIGEON 1-4H OIL 04 16N 03W SW-SE-SW-SW 3508324208 23030 FOX 2-16-9H OIL 09 16N 04W NE-NE-NW-NW 3508324208 23030 FOX 2-16-9H OIL 16 16N 04W NW-SW-NW-NE Facility Decommissioning Plan - Rev 2 February 2021 Page 1 of 2

Preparer: D. Horne; Date: 02/15/21 Table 2 Revision 2 Reviewer: E. Dulle; Date: 02/15/21 Oil/Gas Wells Near the Cimarron Site (As of February 2021}

I Operator API Number Well Name Well No. Well Type SEC TWP RNG Quarter Section Number I I 3508324229 24432 CIMARRON RIVER 16-4-12 lHW OIL 13 16N 04W NW-NE-NW-NW 3508324229 24432 CIMARRON RIVER 16-4-12 lHW OIL 12 16N 04W NE-NW-NW-NW 3508324263 24432 KAY ROTHER 16-4-14 lHW OIL 14 16N 04W NW-NE-NW-NE 3508324263 24432 KAY ROTHER 16-4-14 lHW OIL 12 16N 04W SE-SW-SE-SE 3508324268 24432 KAY ROTHER 16-4-14 lHM OIL 14 16N 04W NW-NE-NW-NE 3508324268 24432 KAY ROTHER 16-4-14 lHM OIL 14 16N 04W SW-SW-SE-SE 3508324280 23535 DAVIS FARMS 1-6H OIL 05 16N 03W SE-SW-SW-SW 3508324281 23030 FOX 3-16-9H OIL 16 16N 04W NE-SW-NW-NE 3508324294 24432 DATIN 16-3-7 lHM OIL 07 16N 03W SE-SE-SW-SW 3508324294 24432 DATIN 16-3-7 lHM OIL 07 16N 03W NE-NE-NW-NW 3508324325 23030 MOSIER 2-4H OIL 04 16N 04W NE-SE-NE-NW 3508324325 23030 MOSIER 2-4H OIL 04 16N 04W SW-SW-SW-SE 3508324406 21316 HARRIS SWD 2 2DCm 13 16N 04W NE-SW-NW-NE Notes API - API Well Number SEC - Section TWP- Township RNG - Range Data was taken from Well Completion List -Master located on https://oklahoma .gov/occ/divisions/oil-gas/oil-gas-data.

Accessed February 8, 2021.

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

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 Epi center Depth (km) Magnitude Maa. Tv oe 1 2021-02-06T10:01 :27.899Z 36.292 -97 .52033 6 km ESE of Covington, Oklahoma 7.28 3.36 ml 2021-02-05T17:48:45. 719Z 36 .289 -97 .51583 5 km WNW of Lucien, Oklahoma 6.67 4.2 mwr 2021-02-05T16: 17:37.1 O0Z 36.288167 -97 .51967 6 km WNW of Lucien, Oklahoma 6.59 3.65 ml 2021-02-05T16: 16:56.929Z 36.284833 -97.5115 5 km WNW of Lucien, Oklahoma 6.66 3.52 ml 2020-12-30T11 :04:44.286Z 37.708 -97.2403 3 km NE of Eastborough, Kansas 5 3.7 mwr 2020-12-23T21 :28: 14.519Z 36.534333 -98.98367 10 km NNE of Quinlan, Oklahoma 6.97 3.11 ml 2020-12-19T18:52:23.61 OZ 37.7205 -97.2149 5 km NE of Eastborough , Kansas 5 3.4 mb lg 2020-12-19T18:47:54.655Z 37.7156 -97.2279 4 km NE of Eastborough, Kansas 5 3.4 mwr 2020-12-1 0T00:53:25.719Z 36.529833 -98.98817 9 km NNE of Quinlan, Oklahoma 7.88 3.02 ml 2020-12-08T16:54:03.780Z 37.718 -97.2422 3 km NNE of Eastborough, Kansas 5 3 mb lg 2020-10-26T06:08:57.226Z 38.6838 -97.0718 0 km SSE of Hope, Kansas 5 3 mb lg 2020-10-24T02:49:00.783Z 38.7205 -97.0628 3 km NNE of Hope, Kansas 5 3 mb lg 2020-10-23T04:08:12.289Z 36.874 -97.44683 7 km N of Nardin, Oklahoma 7.56 3.32 ml 2020-10-23T01 :17:33.130Z 36.874333 -97.4485 7 km N of Nardin, Oklahoma 7.76 3.22 ml 2020-10-22T04:37:08.650Z 36.3645 -97.3445 9 km NNW of Perry, Oklahoma 6.95 3.1 ml 2020-10-21T14:33:28.399Z 36.2765 -97.49833 3 km W of Lucien, Oklahoma 7.31 3.17 ml 2020-09-20T10:54:54 .000Z 36 .128833 -97.59217 4 km SE of Marshall, Oklahoma 7.17 3.4 ml 2020-09-06T11 :08: 14.71 OZ 34.745 -97.573 7 km SSE of Erin Springs, Oklahoma 7 3.43 ml 2020-08-31T15: 18:24.660Z 36.361667 -98 .1515 3 km SE of Meno, Oklahoma 6.69 3.5 ml 2020-08-16T02:49:46.619Z 36.152667 -97 .66833 3 km W of Marshall, Oklahoma 5.16 3.09 ml 2020-08-14T08:27:17.579Z 36.358833 -97.34967 9 km NW of Perry, Oklahoma 7.05 3.2 ml 2020-08-05T10: 13: 10.859Z 36.290833 -98.17433 5 km N of Ames, Oklahoma 7.93 3.05 ml 2020-08-03T23: 13:45.670Z 36.357667 -97.3595 9 km NW of Perry, Oklahoma 7.56 3.44 ml 2020-07-15T15:07:21 .140Z 36.870167 -97.43367 7 km N of Nardin, Oklahoma 7 3.45 ml 2020-06-25T22:43:23.570Z 36.416 -98 .13367 18km SE of Helena, Oklahoma 7.92 3 ml 2020-06-22T21 :47:59 .909Z 36.865 -97.4355 15km WNW of Blackwell, Oklahoma 5 3.7 ml 2020-06-21 T03 : 15:41.689Z 36.358833 -97.35883 8km NW of Perry, Oklahoma 7.78 4.2 mwr 2020-06-18T18:38:13.869Z 35.520333 -96.78517 9km WNW of Prague, Oklahoma 7 3.04 ml 2020-06-03T23:00:27.260Z 36.354833 -97.357 10km NW of Perry, Oklahoma 7.71 3.41 ml 2020-05-24T14:53:59.740Z 36.3645 -98 .1585 23km SSE of Helena, Oklahoma 7.89 3.87 ml 2020-05-17T11 :10:49.119Z 34.9745 -97 .69883 18km S of Blanchard, Oklahoma 11 .2 3.05 ml 2020-05-08T01 :58:40.079Z 36.026667 -98 .0935 19km WSW of Hennessey, Oklahoma 5.75 3 ml 2020-05-04T19:34:22.679Z 36.0235 -98 .0955 19km WSW of Hennessey, Oklahoma 5.85 3.24 ml 2020-05-02T00:50: 10.330Z 35.1015 -97.78367 12km ENE of Chickasha, Oklahoma 9.63 3.26 ml 2020-04-25T03:59:36.250Z 36.862667 -97.43733 15km WNW of Blackwell, Oklahoma 5 3.33 ml 2020-04-04T03:33:08.050Z 36.376167 -97. 718 14km E of Enid, Oklahoma 5 3.6 mwr 2020-04-03T22:35:29.949Z 36.3745 -97.7205 15km ESE of Enid, Oklahoma 5 3.65 mwr 2020-04-01T18:40:38.159Z 35.144833 -95.352 2km ENE of Quinton, Oklahoma 8.84 3.05 ml 2020-03-29T18:07:28.260Z 36.690167 -97 .6865 13km SSE of Medford, Oklahoma 5 3.12 ml 2020-03-26T17:00:04.169Z 36.353667 -97.3545 10km NW of Perry, Oklahoma 6 3.36 ml 2020-03-22T17:50:50.454Z 38.699 -97 .1001 14km WNW of Herington, Kansas 5 3.1 mb lg 2020-03-19T08:42:03.189Z 35.105 -97.77083 11 km WSW of Blanchard, Oklahoma 8.43 3.02 ml 2020-03-12T05:33:48.607Z 38.7397 -97 .0401 11 km NW of Herington, Kansas 5 3.5 mb lg 2020-03-06T01 :42: 14.169Z 34.966833 -97.708 18km SSW of Blanchard, Oklahoma 10.2 3.38 ml 2020-02-08T23: 19: 15.275Z 37.0626 -97.9778 11 km SSE of Anthony, Kansas 5 3.5 mb lg 2020-02-07T02:42:26.079Z 35.098833 -95 .3885 2km SW of Quinton, Oklahoma 6.33 3.21 ml 2020-02-07T01 :49:01 .860Z 35.101333 -95 .3845 2km SW of Quinton, Oklahoma 5.82 3.24 ml 2020-01-29T23: 19:35. 733Z 38.3889 -96.9189 9km ENE of Marion, Kansas 5 3.1 mb lg 2020-01-19T19:08:42.322Z 38.0246 -97 .973 2km W of South Hutchinson, Kansas 5 4.5 mwr 2020-01-11T05:40:17.809Z 36.291833 -98 .17233 23km W of Waukomis, Oklahoma 4.01 3.44 ml 2020-01-01T07:04:14.31 oz 36.4115 -98.14467 19km SE of Helena, Oklahoma 7.8 3.08 ml 2019-12-30T05:57:55.689Z 36.874333 -97.91333 17km WNW of Medford, Oklahoma 7.35 3.73 ml 2019-12-25T11 :24:33.350Z 35.907333 -98.52317 12km WNW of Watonga, Oklahoma 7.53 3.38 ml 2019-12-15T16:09:05.679Z 35.799 -96.65467 4km N of Stroud, Oklahoma 7.09 3.59 ml 2019-12-03T21 :36: 15.380Z 35.140167 -95.32733 3km E of Quinton, Oklahoma 6.77 3.07 ml 2019-12-02T12: 12: 11 .259Z 35.538167 -96 .76133 8km NW of Prague, Oklahoma 9.66 3.75 ml 2019-11-27T15:43:06.669Z 35.847667 -98 .07233 12km W of Kingfisher, Oklahoma 6.58 3.05 ml 2019-11-24T11 :24:55.530Z 35.823667 -98.0975 15km WSW of Kingfisher, Oklahoma 6.3 3.48 ml Facility Decommissioning Plan - Rev 2 February 2021 Page 1 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 2019-11-22T21 :54:49.7002 36.290667 -98.18767 21 km NNE of Okeene, Oklahoma 6.01 3.57 ml 2019-11-22T21 :54:05.6602 36.294167 -98.19133 22km NNE of Okeene, Oklahoma 6.15 3.58 ml 2019-11-22T05:44:36.170Z 36.369333 -97.70783 15km E of Enid, Oklahoma 8.84 3.6 mwr 2019-11-11T23:21 :12.511Z 38.4752 -96.9101 16km NNE of Marion, Kansas 5 3 mb lg 2019-11-05T11 :03:56.21 OZ 36.7025 -97.66167 12km SSE of Medford, Oklahoma 7.38 3.06 ml 2019-11-03T02:08:58.556Z 38.0276 -97.9828 3km W of South Hutchinson, Kansas 2.21 3 mwr 2019-10-23T21 :39:04.7352 38.0193 -97.9773 3km WSW of South Hutchinson, Kansas 4.03 3.1 mb lg 2019-10-22T21 :03:58. 750Z 36.9295 -98.02467 24km S of Anthony, Kansas 6.5 3.67 ml 2019-10-21T16:09:15.339Z 35.132 -95.3495 2km N of Quinton, Oklahoma 5 3.13 ml 2019-10-08T19:47:35.759Z 36.031167 -98.08733 19km WSW of Hennessey, Oklahoma 6.2 3.01 ml 2019-10-08T19: 10:45.21 OZ 36.029333 -98.08867 19km WSW of Hennessey, Oklahoma 5.84 3.03 ml 2019-09-27T14:50:59.9792 36.475 -98.744 32km NW of Fairview, Oklahoma 8.22 3.45 ml 2019-09-21T23:38:10.449Z 35.897 -98.53183 12km WNW of Watonga, Oklahoma 5.29 3.09 ml 2019-09-21 T23:38:08. 730Z 35.8965 -98.5265 12km WNW of Watonga, Oklahoma 6.71 3.09 ml 2019-09-21T08:31 :33.894Z 37.1058 -97.5957 8km N of Caldwell, Kansas 5 3 mb lg 2019-09-17T06:44:43.250Z 36.922333 -97.4815 16km SE of Caldwell, Kansas 6.06 3.25 ml 2019-09-16T14:59:34.201 Z 38.359 -96.8849 11 km E of Marion, Kansas 5 3.2 mb lg 2019-09-16T07:37:27 .525Z 38.487 -96.7491 22km NW of Cottonwood Falls, Kansas 5 3.8 mb 2019-09-09T17:57:06.8302 36.427 -96.9045 13km NW of Pawnee, Oklahoma 6.62 3.25 ml 2019-09-02T22:08:39.000Z 36.928333 -97.4745 16km SE of Caldwell, Kansas 7.65 3.24 ml 2019-09-01T13:21 :06.651 Z 38.034 -97.9805 3km W of South Hutchinson, Kansas 3.13 3.1 mb lg 2019-08-29T08:39:35. 780Z 35.103167 -96 .3185 8km E of Holdenville, Oklahoma 3.02 3.03 ml 2019-08-18T09:07:13.009Z 35.127333 -95 .353 2km NNE of Quinton, Oklahoma 5.9 3.71 mwr 2019-08-18T08:45:29.680Z 38.0146 -98 .005 5km WSW of South Hutchinson, Kansas 5 4.1 mwr 2019-08-17T01 :03:39.3632 38.0204 -98 .0021 5km W of South Hutchinson, Kansas 5 3.1 mb lg 2019-08-16T13:10:49.9392 37.9952 * -98.0943 14km WSW of South Hutchinson, Kansas 5 3.1 mb lg 2019-08-16T12:59:10.201Z 38.0254 -97.9827 3km W of South Hutchinson , Kansas 5 4.2 mwr 2019-08-13T19:40:19.9292 36.701667 -97 .66233 12km SSE of Medford, Oklahoma 7.2 3.44 ml 2019-08-12T01 :26:45.8592 35.133833 -95 .35583 1km ENE of Quinton, Oklahoma 5 3.19 ml 2019-08-09T06:34:58.329Z 35.808167 -98 .11267 15km NW of Okarche, Oklahoma 7 3.43 ml 2019-08-07T23:38:24.539Z 35.831167 -98.09333 15km WSW of Kingfisher, Oklahoma 7 3.46 ml 2019-08-02T10:56:18.9692 36.361667 -98.15283 23km SSE of Helena, Oklahoma 7.18 3.37 mwr 2019-07-27T12:52:50.21 OZ 35.834333 -98.089 14km WSW of Kingfisher, Oklahoma 6.81 3.12 ml 2019-07-27T04:23:28.1 00Z 35.831 -98.09067 14km W of Kingfisher, Oklahoma 7.37 3.52 ml 2019-07-25T18: 10:23.1992 35.841667 -98.0785 12km W of Kingfisher, Oklahoma 7.47 3.35 ml 2019-07-25T09:39:49.439Z 35.842667 -98.07567 12km W of Kingfisher, Oklahoma 7.46 3.33 ml 2019-07-25T05:48: 18.660Z 35.843 -98.076 12km W of Kingfisher, Oklahoma 6.45 3.91 ml 2019-07-25T02:36:33.560Z 36.036167 -98.07717 17km WSW of Hennessey, Oklahoma 6.82 3.03 ml 2019-07-25T02:36:32.509Z 36.027833 -98.09117 19km WSW of Hennessey, Oklahoma 5.77 3.33 ml 2019-07-24T23:25:52.81 OZ 35.815167 -98.09283 12km W of Kingfisher, Oklahoma 7 3.16 ml 2019-07-09T14:44:09.019Z 35.837667 -98.07917 12km W of Kingfisher, Oklahoma 6.29 3.11 ml 2019-06-20T11 :23:03.6002 36.289167 -97 .51083 19km W of Perry, Oklahoma 7.26 3.02 ml 2019-06-14T03:15:21 .170Z 35.798833 -96 .6555 5km N of Stroud, Oklahoma 7.09 3.44 ml 2019-05-26T12:54:07.8902 36.7 -97 .6962 12km SSE of Medford, Oklahoma 5 3.1 mb lg 2019-05-18T09:55:36. 727Z 36.7037 -97.6626 13km SSE of Medford, Oklahoma 5 3.3 mwr 2019-05-17T20:33:15.683Z 36.6697 -97 .7055 15km S of Medford, Oklahoma 5 4.4 mwr 2019-05-16T22:53:43.486Z 35.98 -96.7982 2km WSW of Cushing, Oklahoma 5 3.1 mwr 2019-05-16T18:19:46.8262 35.0879 -96 .29 9km E of Holdenville, Oklahoma 5 3.3 mb lg 2019-04-30T04:51 :25.095Z 36.6971 -97.6852 12km SSE of Medford, Oklahoma 2.95 3.1 mwr 2019-03-22T22:36: 19.199Z 36.695667 -97.68717 11 km SSE of Medford, Oklahoma 7.44 3.19 ml 2019-03-0H00: 15:23.3502 35.7312 -97.566 11 km NW of Edmond, Oklahoma 5 3.1 mb lg 2019-02-28T02: 13:48.1402 36.2719 -97.4989 19km W of Perry, Oklahoma 5 3.2 mwr 2019-02-27T13:01 :06.160Z 36.8786 -97.9145 17km WNW of Medford , Oklahoma 6.76 3.2 mwr 2019-02-26T23:50:24. 770Z 36.878 -97 .9301 19km WNW of Medford, Oklahoma 5 3.8 mwr 2019-02-19T18:08: 10. 770Z 35.1046 -97 .8624 8km NE of Chickasha, Oklahoma 5 3 mb lg 2019-02-14T00:48:30.899Z 36.4105 -96 .8711 10km NW of Pawnee, Oklahoma 5 3.2 mb lg 2019-02-13T16:39:49.8902 35.5582 -97 .1129 8km NNE of Harrah, Oklahoma 5 3.4 mb lg 2019-01-25T18:32:40. 780Z 37.06 -97.3647 21 km E of Caldwell, Kansas 4.29 3.3 mwr Facility Decommissioning Plan - Rev 2 February 2021 Page 2 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 2019-01-21 T05:27:36 .080Z 36.3725 -98.1353 22km SSE of Helena, Oklahoma 5 3.3 mb lg 2019-01-17T03:55:06.320Z 37.0741 -97.975 10km SSE of Anthony, Kansas 10 3.1 ml 2019-01-16T03:34:30.470Z 37.0649 -97 .3543 22km S of Wellington, Kansas 5 4 mwr 2019-01-15113:28:02.21 oz 36.2129 -97.5715 26km WSW of Perry, Oklahoma 5 3.9 mwr 2019-01-14T08:20:07.540Z 36.2715 -97 .624 24km E of Waukomis, Oklahoma 5 3.6 mb lg 2019-01-06T10:38:29.5002 36.372 -98.1346 22km SSE of Helena, Oklahoma 5 3 mb lg 2018-12-29T04:05:57.890Z 36 .0998 -97.8674 3km ESE of Hennessey, Oklahoma 5 3 mb lg 2018-12-28112:32:28.9802 36.3858 -98.386 15km NNE of Fairview, Oklahoma 5 3.1 mb lg 2018-12-22T23:20:25.020Z 36.879 -97.9152 18km WNW of Medford, Oklahoma 7.21 3.1 ml 2018-12-17T07:42 :48.230Z 36.4566 -98.7897 34km NW of Fairview, Oklahoma 5 3 mb lg 2018-12-15121 :31 :04.050Z 36.2856 -97.5158 20km W of Perry, Oklahoma 4.86 3 mb lg 2018-12-15T06:09:27.520Z 36.4483 -98.778 33km NW of Fairview, Oklahoma 5 3.1 mb lg 2018-12-1 0T06:23:03.630Z 34.0395 -97.406 13km S of Wilson, Oklahoma 19.61 3 ml 2018-12-05116:55: 16. 730Z 36.1019 -97.8459 4km E of Hennessey, Oklahoma 5 3 mb lg 2018-12-05T02:02:59.100Z 36.4547 -98.8018 35km NW of Fairview, Oklahoma 5.79 3.2 ml 2018-12-02T00:12:48.870Z 36.4162 -96 .9059 12km NW of Pawnee, Oklahoma 7.17 3.1 mb lg 2018-11-30T23:56:05.550Z 37.3583 -97 .9744 9km NNE of Harper, Kansas 5.8 3.2 mb lg 2018-11-27T08:07:07.060Z 34.6387 -96.3223 14km NW of Coalgate, Oklahoma 6.07 3.2 ml 2018-11-26115:42:49.81 oz 34.053 -97.4342 12km S of Wilson, Oklahoma 6 3.1 ml 2018-11-26113:52:51 .5302 34.6437 -96.3232 15km NW of Coalgate, Oklahoma 5.68 3 ml 2018-11-26113:46: 12.6702 34.6358 -96.3272 14km NW of Coalgate, Oklahoma 5.8 3.1 ml 2018-11-25T22:24:48.620Z 35.233 -97.7888 6km SSE of Tuttle, Oklahoma 6 3 ml 2018-11-22123:01 :52.440Z 36.9198 -97.9274 21 km NW of Medford, Oklahoma 5 3.1 ml 2018-11-19118: 12:55.2802 35.0272 -97.623 12km SSE of Blanchard, Oklahoma 9.2 3 ml 2018-11-18104:57:58.21 oz 35.8532 -97.8183 10km E of Kingfisher, Oklahoma 6.54 3 ml 2018-11-16117:25: 19.9702 36.9648 -97.8413 19km NNW of Medford, Oklahoma 7.3 3 ml 2018-11-14T03:08:50.040Z 36.2908 -97.0122 19km NNE of Stillwater, Oklahoma 5.32 3.3 mb lg 2018-11-12118:39: 18. 780Z 36.4018 -96 .8737 9km NW of Pawnee, Oklahoma 5 3 mb lg 2018-11-05T00:53:57.000Z 35.2355 -97.7523 8km SE of Tuttle, Oklahoma 6.28 3.3 ml 2018-10-25110:26:01 .2002 35.9631 -97.2321 2km NE of Langston, Oklahoma 4.964 3 ml 2018-10-23T11 :29:00.6002 34.0524 -97.4131 12km S of Wilson, Oklahoma 6.535 3.4 ml 2018-10-22T18:33:30.9002 36.2176 -98.9302 20km N of Taloga, Oklahoma 3.965 3.1 ml 2018-10-1OT10:24:53.8002 35.6779 -97 .0834 10km E of Luther, Oklahoma 6.132 3.6 ml 2018-1 0-09T22: 32: 36.500Z 36.842 -97 .6888 5km NE of Medford, Oklahoma 2.542 3.5 ml 2018-10-03T09:28:05.100Z 36.2204 -98 .9368 20km N of Taloga, Oklahoma 5.54 3.3 ml 2018-10-03T07:36:41 .360Z 37.371 -97.984 10km NNE of Harper, Kansas 5 3.5 mb lg 2018-10-02T10:29:16.3002 36.2203 -98.9298 20km N of Taloga, Oklahoma 3.755 3 ml 2018-10-01 T00:33:23 .3002 37.1802 -97.4537 11 km SW of Wellington, Kansas 6.47 3 ml 2018-09-29112:45:47.4002 36.1793 -97.4823 21 km SW of Perry, Oklahoma 5.48 3.4 mwr 2018-09-28T07:07:08.700Z 35.0418 -97 .5829 12km SSE of Blanchard, Oklahoma 6.989 3 ml 2018-09-27T03:46:11.000Z 35.9603 -97.2337 2km NE of Langston, Oklahoma 6.707 3.3 ml 2018-09-27101 :55:52 .6002 36.2051 -98.921 18km NNE of Taloga, Oklahoma 6.133 3 ml 2018-09-26121 :47:49.000Z 34 .0505 -97.4332 12km S of Wilson, Oklahoma 6.384 3 ml 2018-09-26T07:37: 17.3002 36.1555 -98.2908 4km NNE of Okeene, Oklahoma 5.106 3 ml 2018-09-24119:46:05. 700Z 35.9609 -97.2376 2km NE of Langston, Oklahoma 6.085 3.1 ml 2018-09-19T05:15:16.000Z 35.8444 -97 .3384 8km ESE of Guthrie, Oklahoma 4.48 3 ml 2018-09-13118:30:50.000Z 36.8261 -98.4513 11 km NW of Cherokee, Oklahoma 3.145 3 ml 2018-09-13T07:43:31.750Z 37.3406 -97 .9786 7km NE of Harper, Kansas 5.3 3.1 mb lg 2018-09-11116:11 :29.400Z 36.2153 -97.5688 26km WSW of Perry, Oklahoma 6.708 3.3 ml 2018-09-09101 :48:38.5002 36.489 -98.7253 32km NW of Fairview, Oklahoma 7.712 3.5 ml 2018-09-08114:36:33.4002 36.4603 -98.7576 32km NW of Fairview, Oklahoma 7.664 3.5 mwr 2018-09-08T06:23:24.870Z 37.1983 -97.7742 23km ENE of Anthony, Kansas 6.46 3.7 mb 2018-08-31T04:44:29.930Z 37.3866 -97.9537 12km NNE of Harper, Kansas 5 3 mb lg 2018-08-30T20:37:08.1 0OZ 37.3356 -97 .8648 15km ENE of Harper, Kansas 5 3.9 mwr 2018-08-30T04:54: 14.1302 37.361 -97.851 17km ENE of Harper, Kansas 10.32 3.2 mb lg 2018-08-30T00: 12:55.8602 37.3722 -97.8452 18km ENE of Harper, Kansas 5 3.1 mb lg 2018-08-29T23:56:20.270Z 37.3549 -97.859 16km ENE of Harper, Kansas 9.75 3 mb lg 2018-08-29T03:04:06.600Z 36.4571 -98.8042 35km NW of Fairview, Oklahoma 4.87 3.2 mwr Facility Decommissioning Plan - Rev 2 February 2021 Page 3 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 2018-08-27T07:44:55.020Z 37.3656 -97.9945 9km NNE of Harper, Kansas 5 3.4 mb lg 2018-08-15T10:27:57.51 OZ 37.3567 -97.9802 8km NNE of Harper, Kansas 5 3 mb lg 2018-08-13T19:08:11 .500Z 34 .9882 -97.5381 16km W of Purcell, Oklahoma 3.692 3 ml 2018-08-13T18:01 :24.300Z 36.5158 -99 .0066 19km ENE of Mooreland, Oklahoma 5.93 3 ml 2018-08-08T23:07:43.200Z 36.2135 -97 .5522 25km WSW of Perry, Oklahoma 6.676 3 ml 2018-08-08T02:57:26.300Z 36.8451 -97 .6978 5km NE of Medford, Oklahoma 6.957 3.4 mwr 2018-08-06T10:39:22.600Z 36.4561 -98.7891 34km NW of Fairview, Oklahoma 6.28 3 ml 2018-08-03T20:58:21.400Z 36.482 -97 .7331 16km NE of Enid, Oklahoma 4.843 3.2 ml 2018-08-01T10:11 :14.000Z 35.0409 -97 .5912 12km SSE of Blanchard, Oklahoma 6.139 3.4 mwr 2018-07-31T05: 12:54 .700Z 36.7774 -98.6821 3km SSW of Alva, Oklahoma 11 .247 3.2 ml 2018-07-27T10:43:06.600Z 36.8475 -97.6964 5km NE of Medford, Oklahoma 6.883 3.3 ml 2018-07-27T10:06:44.1 00Z 36.6324 -98 .5139 19km SW of Cherokee, Oklahoma 6.325 3.1 ml 2018-07-26T21 :02:00.900Z 36.4462 -98 .7791 33km NW of Fairview, Oklahoma 7.796 3.3 ml 2018-07-26T20:42:49.000Z 35.7956 -97.1937 14km N of Luther, Oklahoma 5.407 3 ml 2018-07-24T22:35:57 .500Z 35.6707 -97.406 6km ENE of Edmond , Oklahoma 7.139 3.3 mwr 2018-07-24T21: 10:29.500Z 35.6711 -97.4003 7km ENE of Edmond, Oklahoma 6.654 3.2 ml 2018-07-20T21 :01 :54.600Z 35.8972 -97.2759 5km SSW of Langston, Oklahoma 6.659 3.1 ml 2018-07-20T19:46:56.300Z 35.8955 -97 .2745 5km SSW of Langston, Oklahoma 7.285 3 ml 2018-07-18T05: 19:28.400Z 36.6572 -98.467 14km SW of Cherokee, Oklahoma 7.343 3.2 ml 2018-07-18T04:48:52.000Z 36.6571 -98.4679 14km SW of Cherokee, Oklahoma 7.309 3 ml 2018-07-17T20:38:07.850Z 35.655 -97.4134 5km E of Edmond, Oklahoma 6 3.1 mb lg 2018-07-13T06:06:05.700Z 36.4543 -98.7663 32km NW of Fairview, Oklahoma 8.725 3.2 mwr 2018-07-1 0T11 :56:36.000Z 36.848 -97 .6983 5km NE of Medford, Oklahoma 7.906 3.1 ml 2018-07-1 0T07:18: 17.500Z 36.2977 -97 .5297 21 km W of Perry, Oklahoma 7.735 3.4 mwr 2018-07-07T21 :50:12.700Z 36.9859 -97.4955 11 km ESE of Caldwell, Kansas 5.353 3.4 ml 2018-07-02T21 :08:51.500Z 35.8906 -97 .2822 6km SSW of Langston, Oklahoma 6.136 3.5 ml 2018-07-02T12:28:04.200Z 35.9739 -97.7967 17km NE of Kingfisher, Oklahoma 5.676 3 ml 2018-07-02T00:03: 12.700Z 36.7628 -98.0658 25km E of Cherokee, Oklahoma 6.792 3.1 ml 2018-07-01 T02:58: 14.200Z 35.8891 -97 .2831 6km SSW of Langston, Oklahoma 6.283 3.2 ml 2018-06-30T06:28: 14.500Z 35.3761 -98.1118 15km W of Union City, Oklahoma 11 .976 3.1 ml 2018-06-27T14:04:25.230Z 37.2998 -97.4185 5km NW of Wellington, Kansas 5 3.2 mb lg 2018-06-22T23:38:20.000Z 36.6684 -98.7615 17km SSW of Alva, Oklahoma 6.545 3 ml 2018-06-22T03:29:55.200Z 36.1016 -97.8355 5km E of Hennessey, Oklahoma 5.048 3.2 mwr 2018-06-19T16:00:38.600Z 36.2788 -97.5072 19km W of Perry, Oklahoma 8.366 3.8 ml 2018-06-19T15:58:09.800Z 35.3674 -98.0687 11 km WSW of Union City, Oklahoma 6.614 3.1 ml 2018-06-18T22:21 :22.930Z 37.3495 -97.973 8km NE of Harper, Kansas 5 3.1 mb lg 2018-06-17T06: 16: 15.400Z 36.0677 -97.5723 12km N of Crescent, Oklahoma 6.252 3.3 ml 2018-06-15T20:56:08.600Z 36.0742 -97.5593 13km NNE of Crescent, Oklahoma 6.615 4 mwr 2018-06-11T19:20:31 .500Z 36.4909 -98.6218 27km NNW of Fairview, Oklahoma 5.851 3.1 ml 2018-06-09T13.:59:41.400Z 36.764 -98 .062 26km E of Cherokee, Oklahoma 9.5 4.4 mwr 2018-06-08T19: 14:00.400Z 36.286 -97.5107 20km W of Perry, Oklahoma 6.597 3.2 ml 2018-06-07T07:01 :54.1 ooz 36.286 -97.5091 19km W of Perry, Oklahoma 6.281 3.1 ml 2018-06-06T12:25:31 .000Z 36.2309 -97 .2945 6km S of Perry, Oklahoma 7.069 3 ml 2018-06-04T23: 16:44.700Z 36.817 -97 .6114 10km E of Medford, Oklahoma 5.712 3.1 ml 2018-06-04T11 :23:57.400Z 36.6968 -97 .6837 13km SSE of Medford, Oklahoma 6.788 3.2 mwr 2018-05-26T19:26:41 .500Z 35.9936 -96 .7497 1km ENE of Cushing, Oklahoma 4.372 3.2 ml 2018-05-23TO0: 15:49.000Z 35.6805 -97 .3925 8km ENE of Edmond, Oklahoma 5.467 3.4 ml 2018-05-17T20:05:45.000Z 36.0674 -97.5709 12km N of Crescent, Oklahoma 6.077 3.7 ml 2018-05-15T13:40:21.500Z 36.0725 -97 .5641 13km NNE of Crescent, Oklahoma 6.29 4 mwr 2018-05-14T09:22:25.1 00Z 36.0706 -97 .5685 13km N of Crescent, Oklahoma 8.172 3 ml 2018-05-14T07:25:00.600Z 36.0713 -97 .5655 13km NNE of Crescent, Oklahoma 6.858 4 mwr 2018-05-14T05:02:54.900Z 36.0718 -97.5679 13km N of Crescent, Oklahoma 7.949 3 ml 2018-05-13T23:28:48.300Z 36.0716 -97 .5655 13km N of Crescent, Oklahoma 7.435 3.7 mwr 2018-05-09T17:25: 15.500Z 36.5352 -98 .9636 24km ENE of Mooreland , Oklahoma 5.829 3 ml 2018-04-30T11 :01 :24.400Z 36.4609 -98.7946 35km NW of Fairview, Oklahoma 5.364 3.2 ml 2018-04-28T05:53:25.500Z 36.1026 -97 .8347 5km E of Hennessey, Oklahoma 5 3 ml 2018-04-26T19:23: 18.300Z 36.945 -97.6324 9km SSW of Caldwell, Kansas 6.767 3 ml 2018-04-25T14:52:58. 700Z 36.9404 -97.6368 10km SSW of Caldwell, Kansas 4.217 3 ml Facility Decommissioning Plan - Rev 2 February 2021 Page 4 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 2018-04-25T14:46:21.500Z 36 .947 -97.6251 9km S of Caldwell, Kansas 6.908 3 ml 2018-04-24T13: 17:48.000Z 36.4642 -96.8665 15km NNW of Pawnee, Oklahoma 5 3.4 ml 2018-04-21T14:26:02.100Z 36.1252 -97.2366 16km W of Stillwater, Oklahoma 5.233 3 ml 2018-04-20T19:53:34.100Z 36 .9394 -97.6233 10km S of Caldwell, Kansas 5 3.1 ml 2018-04-20T19:33:54.800Z 36.9424 -97 .6323 10km SSW of Caldwell, Kansas 5.863 3 ml 2018-04-20T19:28:49.100Z 36.9451 -97 .6185 9km S of Caldwell, Kansas 5.546 3.6 mwr 2018-04-19T10:32:44.000Z 36.0386 -97.9022 7km S of Hennessey, Oklahoma 5.6 3.1 ml 2018-04-19T07:20:05.600Z 36.036 -97.9043 8km S of Hennessey, Oklahoma 5.88 3.5 ml 2018-04-19T06:36:34.900Z 36.4506 -98.7849 34km NW of Fairview, Oklahoma 6.355 3.6 mwr 2018-04-17T08:57:59.200Z 35.7812 -98.576 16km WSW of Watonga, Oklahoma 2.863 3.1 ml 2018-04-14T02:46:34.090Z 38.0247 -97.9926 4km W of South Hutchinson, Kansas 5 3.2 mb lg 2018-04-09T10:22:20.300Z 36.2185 -97.5735 26km WSW of Perry, Oklahoma 4.935 4.6 mww 2018-04-09T09:26:31 .200Z 36.2151 -97.5686 26km WSW of Perry, Oklahoma 6.35 3.1 mwr 2018-04-08T22:26:24.500Z 36.2982 -97 .5311 21 km W of Perry, Oklahoma 6.796 3.1 ml 2018-04-08T07:25:32.970Z 37.199 -97.7747 23km ENE of Anthony, Kansas 6.21 3.5 ml 2018-04-07T16:21 :21.400Z 35.6721 -97.4039 7km ENE of Edmond, Oklahoma 6.916 3.5 ml 2018-04-07T12:23:23.800Z 36.2871 -97 .5092 19km W of Perry, Oklahoma 7.266 3.7 ml 2018-04-07T12: 16:03.300Z 36.2896 -97.5166 20km W of Perry, Oklahoma 5.791 4.6 mww 2018-04-07T09:48:03.500Z 36.2189 -97.5735 26km WSW of Perry, Oklahoma 6.271 3.3 ml 2018-04-06T15:21 :31.500Z 36.2884 -97 .5152 20km W of Perry, Oklahoma 8.169 3 ml 2018-04-06T15:07: 12.900Z 36.2854 -97.5106 19km W of Perry, Oklahoma 6.292 3.9 mwr 2018-04-06T15:05:26.600Z 36.2831 -97.5084 19km W of Perry, Oklahoma 7.996 3 ml 2018-04-05T08:51 :40.900Z 36.4671 -96.8676 15km NNW of Pawnee, Oklahoma 5.004 3.5 ml 2018-04-04T18: 17: 12.700Z 36.4665 -96.8674 15km NNW of Pawnee, Oklahoma 4.5 3.6 ml 2018-04-03T08:07:01 .000Z 36.0865 -97.5442 15km NNE of Crescent, Oklahoma 6.283 3.1 ml 2018-04-01 T01 :34:49. 700Z 35.378 -98.092 13km W of Union City, Oklahoma 7.15 3.1 ml 2018-03-24T17:07:57.000Z 36.8455 -97.7005 5km NE of Medford, Oklahoma 7.565 3 ml 2018-03-24T13:30:56.200Z 36.9938 -97.4917 11 km ESE of Caldwell, Kansas 6.718 3.2 ml 2018-03-24T08:19:47.500Z 36.6963 -97.6853 13km SSE of Medford, Oklahoma 8.475 3.3 ml 2018-03-24T07:06:02.900Z 36.4849 -97.7577 14km NE of Enid, Oklahoma 7.368 3.1 ml 2018-03-23T01 :43:09.600Z 35.8653 -96.6804 13km N of Stroud, Oklahoma 6.046 3 ml 2018-03-21T18:04:42.900Z 35.9725 -97.7941 17km NE of Kingfisher, Oklahoma 6.204 3 ml 2018-03-20T23:24:56.500Z 36.4534 -98 .7699 331<m NW of Fairview, Ol<lahoma 8.229 3.4 ml 2018-03-16T10:59:41.600Z 36.7131 -99 .386 25km ESE of Buffalo, Oklahoma 4.312 3 ml 2018-03-1 0T20:37:25.500Z 36.8425 -98.2396 14km NE of Cherokee, Oklahoma 6.311 3 ml 2018-03-09T20:32:47.300Z 36.4891 -97.7531 15km NE of Enid, Oklahoma 5.715 3.1 ml 2018-03-09T06: 16:45.500Z 36.4509 -98.7673 32km NW of Fairview, Oklahoma 7.245 3.6 ml 2018-03-08T10:48:21.430Z 38.0535 -97 .9539 2km WSW of Hutchinson, Kansas 10.63 3.4 mb lg 2018-03-06T19:46: 12. 700Z 36.9111 -98.328 17km N of Cherokee, Oklahoma 7.743 3.8 mwr 2018-03-05T06:35: 19.600Z 36.4845 -97 .7621 14km NE of Enid, Oklahoma 8.209 3 ml 2018-03-05T03:40:59.200Z 36.4833 -97.7491 15km NE of Enid, Oklahoma 8.229 4.2 mwr 2018-03-04T23: 17:17.400Z 36.478 -97.7411 15km NE of Enid, Oklahoma 8.103 4.2 mwr 2018-03-01 T20:26:59.230Z 38.042 -97.9875 4km WNW of South Hutchinson, Kansas 5 3.1 mb lg 2018-03-01T05:10:47.800Z 35.6888 -97.3051 10km WNW of Luther, Oklahoma 5.248 3.7 ml 2018-02-26T07:46:25. 700Z 36.2086 -97.4246 15km SW of Perry, Oklahoma 8 3 ml 2018-02-25T08:04:52.200Z 36.7557 -97 .5248 19km ESE of Medford, Oklahoma 8.174 3 ml 2018-02-24T21 :06:51.300Z 36.4519 -98.771 33km NW of Fairview, Oklahoma 8.133 3.3 ml 2018-02-24T11 :55:45.300Z 36.913 -97.6509 13km SSW of Caldwell, Kansas 7.686 3.6 ml 2018-02-22T09:54:50.400Z 36.2298 -97 .3408 8km SW of Perry, Oklahoma 8.201 3.1 ml 2018-02-21 TOO: 18:36.900Z 36.1239 -97 .8153 7km ENE of Hennessey, Oklahoma 7.394 3.4 ml 2018-02-18T04:44:48.600Z 35.7914 -98.5748 15km WSW of Watonga, Oklahoma 2.281 3.2 ml 2018-02-16T23:08:35.200Z 35.6892 -97.3031 10km WNW of Luther, Oklahoma 5.568 3.2 ml 2018-02-16T15:53:06.900Z 36.9554 -99 .3476 28km ENE of Buffalo, Oklahoma 2.882 3.1 ml 2018-02-16T13:21 :09.000Z 36.5336 -98.9685 23km ENE of Mooreland, Oklahoma 6.904 3.7 mwr 2018-02-16T07: 16:06.300Z 36.5355 -98 .9648 24km ENE of Mooreland, Oklahoma 6.753 3.4 ml 2018-02-13T03:34:37.000Z 36.0361 -97 .9017 8km S of Hennessey, Oklahoma 4.599 3.2 ml 2018-02-11 T11 :40:26.200Z 36.033 -97 .9069 8km S of Hennessey, Oklahoma 5.911 3.5 ml 2018-02-08T13:20:32.600Z 36.0363 -97.9003 8km S of Hennessey, Oklahoma 5.146 3 ml Facility Decommissioning Plan - Rev 2 February 2021 Page 5 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 2018-02-08T12:28:55.800Z 36.0415 -97 .8949 7km S of Hennessey, Oklahoma 3.768 3 ml 2018-02-07T16: 12:55.000Z 36.0403 -97.8983 7km S of Hennessey, Oklahoma 3.648 3.2 ml 2018-02-07T11: 11 :47 .550Z 37.2033 -97.816 19km ENE of Anthony, Kansas 5.65 3.1 ml 2018-02-05T08:25:39.400Z 36.0355 -97.9032 8km S of Hennessey, Oklahoma 6.871 3.2 mwr 2018-02-05T08:20:51.700Z 36.0325 -97.906 8km S of Hennessey, Oklahoma 6.411 3.7 mwr 2018-02-04T09:39:36.400Z 34.6722 -97.4959 18km SSW of Maysville, Oklahoma 4.425 3.2 ml 2018-01-28T20:09:25.1 00Z 36.8544 -97.4305 14km WNW of Blackwell, Oklahoma 5 3 ml 2018-01-23T06:42: 16. 700Z 36.9542 -97.3656 18km NNW of Blackwell, Oklahoma 7.988 3 ml 2018-01-23T06:33:23.900Z 36.9551 -97.3628 18km NNW of Blackwell, Oklahoma 8.029 3 ml 2018-01-22T10:45:33.300Z 36.153 -97.661 21 km ENE of Hennessey, Oklahoma 6.647 3.6 ml 2018-01-21T17:26:48.200Z 36.459 -98.8168 34km E of Mooreland, Oklahoma 6.01 3 ml 2018-01-16T05:03: 11.900Z 36.1229 -97.8083 8km E of Hennessey, Oklahoma 5 3.1 ml 2018-01-13T01 :04:08.1 00Z 35.6711 -97.4005 7km ENE of Edmond, Oklahoma 6.396 3.6 ml 2018-01-12T08:41 :40.200Z 36.876 -97.442 16km WNW of Blackwell, Oklahoma 7.578 3.1 ml 2018-01-07T10:55 :39 .550Z 35.1145 -95 .8344 20km NNW of McAlester, Oklahoma 5 3.1 ml 2018-01-03T04:00:29.800Z 36.1603 -98 .377 7km NW of Okeene, Oklahoma 5.667 3.4 ml 2018-01-02T17:43:49.200Z 36.1523 -97.6696 21 km ENE of Hennessey, Oklahoma 4.492 3.5 ml 2017-12-31T19:09:31 .700Z 36.1511 -97 .6653 21 km ENE of Hennessey, Oklahoma 6.059 3.2 ml 2017-12-30T04: 13:24.200Z 36.7203 -99.3909 24km ESE of Buffalo, Oklahoma 6.216 3.2 ml 2017-12-29T04:45:00.000Z 36.1543 -97.671 21 km ENE of Hennessey, Oklahoma 5.644 3.8 mwr 2017-12-28T20: 11 :14.1 00Z 35.4215 -97.024 6km ESE of McLoud, Oklahoma 5.133 3.7 ml 2017-12-21 T08:05:26.300Z 35.8917 -97 .2867 6km SSW of Langston, Oklahoma 6.946 3.1 ml 2017-12-21 T04 :22:24.600Z 35.8931 -97 .2909 6km SSW of Langston, Oklahoma 7.171 3.5 ml 2017-12-20T06:00:02 .200Z 36.15 -97.6687 21 km ENE of Hennessey, Oklahoma 5.047 3.5 ml 2017-12-19T23:58:02 .500Z 36.1513 -97.6721 20km ENE of Hennessey, Oklahoma 5 3 ml 2017-12-19T16:57:27.300Z 36.153 -97.6706 21 km ENE of Hennessey, Oklahoma 5 3.2 ml 2017-12-19T15:47:46.800Z 36.1542 -97.669 21 km ENE of Hennessey, Oklahoma 4.5 3.2 ml 2017-12-19T14:33:03.800Z 34 .9544 -97.8208 9km E of Ninnekah, Oklahoma 6.366 3 ml 2017-12-19T11 :26: 19.200Z 36.5457 -98.9637 24km ENE of Mooreland , Oklahoma 5 3.8 mwr 2017-12-18T13:47:21 .100Z 35.8904 -97.2816 6km SSW of Langston, Oklahoma 5.755 3 ml 2017-12-16T13:38 :16.500Z 35.889 -97.2831 6km SSW of Langston, Oklahoma 5.92 3 ml 2017-12-15T11 :41 :22.800Z 36 .5118 -98.6412 30km NNW of Fairview, Oklahoma 5 3.1 ml 2017-12-15T08:18:58.400Z 35.7956 -96.9594 12km NW of Chandler, Oklahoma 7.097 3 ml 2017-12-14T16:35:38.690Z 37.2027 -97 .812 20km ENE of Anthony, Kansas 5.57 3 ml 2017-12-14T16:29:21.660Z 37.2013 -97.812 20km ENE of Anthony, Kansas 4.52 3 ml 2017-12-1OT12:02:45.1 00Z 36.7016 -98.4297 8km SW of Cherokee , Oklahoma 5 3.5 ml 2017-12-1 0T11 :50:46.900Z 36.5034 -98.4645 18km WSW of Helena, Oklahoma 6.45 3.3 ml 2017-12-06T17:46:00.100Z 36.1543 -97.4844 23km SW of Perry , Oklahoma 7.568 3.2 ml 2017-12-05T04:26:38.200Z 36.3699 -97 .1259 17km ENE of Perry, Oklahoma 6.706 4.1 mwr 2017-12-05T00:31 :59.600Z 36.5837 -98 .5266 23km W of Helena, Oklahoma 3.432 3 ml 2017-12-01T22:05:07.1ooz 36.0121 -97.9287 11 km SSW of Hennessey, Oklahoma 4.7 3.1 ml 2017-12-01 T02:44:03.400Z 36.6396 -99.1881 22km N of Mooreland, Oklahoma 3.401 3 ml 2017-11-26T21: 11 :51 .000Z 36.1069 -97.8283 6km E of Hennessey, Oklahoma 6.266 3.4 ml 2017-11-21T14:04:39.500Z 34 .8772 -97 .6821 8km WNW of Lindsay, Oklahoma 2.363 3 ml 2017-11-20T05:55:38.900Z 36.0179 -97 .3284 10km NW of Langston, Oklahoma 6.031 3.2 ml 2017-11-19T08:20:31 .500Z 35.6697 -97 .391 8km ENE of Edmond, Oklahoma 6.031 3 ml 2017-11-19T08:12:50.900Z 35.6704 -97.3933 7km ENE of Edmond, Oklahoma 4.855 3.6 mwr 2017-11-18T18:41 :55.900Z 36.1326 -98 .9735 10km N of Ta loga, Oklah oma 3.83 3.1 ml 2017-11-17T06:48:14.300Z 36 .8739 -97.4438 16km WNW of Blackwell, Oklahoma 6.481 3.3 ml 2017-11-16T02:21 :40.400Z 36.3675 -98 .1585 22km SSE of Helena, Oklahoma 6.498 3.5 ml 2017-11-15T12:32:29.900Z 36.458 -98.7977 35km NW of Fairview, Oklahoma 6.044 3.2 ml 2017-11-09T08:45: 12.800Z 36.8999 -97.5166 16km SSE of Caldwell, Kansas 5.909 3.2 ml 2017-11-08T11 :47:16.200Z 36.2819 -97.5042 19km W of Perry, Oklahoma 7.338 3.5 mwr 2017-11-07T08:12:03.100Z 36.9172 -97.6473 13km SSW of Caldwell , Kansas 8.43 3.2 ml 2017-11-04T18:17:16.200Z 36.0344 -97 .906 8km S of Hennessey, Oklahoma 7.671 3.3 ml 2017-11-04T04:23:32 .900Z 36.3167 -96 .9693 15km W of Pawnee, Oklahoma 5.944 3 ml 2017-11 -04T01:17:10.00oz 36.1538 -97.4815 23km SW of Perry, Oklahoma 7.791 3 ml 2017-11-03T10:26:09.200Z 36.9108 -98.33 17km N of Cherokee, Oklahoma 4.978 3.1 ml Facility Decommissioning Plan - Rev 2 February 2021 Page 6 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 2017-11-02123:31 :31.300Z 36.9075 -98 .3337 17km N of Cherokee, Oklahoma 6.589 3.4 ml 2017-11-02T12:59:57.700Z 36.9096 -98 .3299 17km N of Cherokee, Oklahoma 9.847 3.7 ml 2017-11-02112:06: 17.300Z 36.0365 -97.9026 8km S of Hennessey, Oklahoma 6.282 3.5 ml 2017-11-02T04:29:24.700Z 36.3672 -98 .1587 22km SSE of Helena, Oklahoma 6.518 3.1 ml 2017-11-01120:54: 11 .600Z 36.0319 -97 .9082 8km S of Hennessey, Oklahoma 6.355 3.7 ml 2017-11-01T13: 19:39.300Z 36 .0263 -97.9121 9km S of Hennessey, Oklahoma 5.637 3.7 ml 2017-10-31T12: 18: 13.000Z 36.0343 -97 .9055 8km S of Hennessey, Oklahoma 5.823 3.2 ml 2017-10-31110:30:27.1 ooz 36 .0269 -97 .9106 9km S of Hennessey, Oklahoma 5.642 3.3 ml 2017-10-31T10:04:49.?00Z 36.0279 -97 .9102 9km S of Hennessey, Oklahoma 5.906 3 ml 2017-10-31109:50:51.400Z 36.0299 -97 .9075 8km S of Hennessey, Oklahoma 4.207 3.9 mwr 2017-10-31107:06:46.300Z 36 .0328 -97.9046 8km S of Hennessey, Oklahoma 6.444 3.1 ml 2017-10-30T14:49:48.800Z 36.5046 -98.4681 18km WSW of Helena, Oklahoma 5.698 3.3 ml 2017-10-25115: 17:48.200Z 36.2824 -97 .504 19km W of Perry, Oklahoma 7.408 3.1 ml 2017-10-24101 :36:27.400Z 36.0306 -97 .9068 8km S of Hennessey, Oklahoma 7.429 3.3 ml 2017-10-21116:03:47 .500Z 36.9603 -97 .7125 12km SW of Caldwell, Kansas 5.22 3.3 ml 2017-10-18T17:37:12.800Z 36.9137 -97 .6539 13km SSW of Caldwell, Kansas 7.695 3.1 ml 2017-10-16118:13:33.1 ooz 36.3059 -98 .1882 24km NNE of Okeene, Oklahoma 7.199 3 ml 2017-10-13T17:52:42.600Z 36.843 -99 .7192 7km W of Buffalo, Oklahoma 4.033 3 ml 2017-10-12T14:46:31.400Z 35.5993 -97.408 8km SE of Edmond, Oklahoma 4.791 3.3 ml 2017-10-11 T23:29:06.460Z 37.3475 -98.1347 11 km NW of Harper, Kansas 3.23 3.1 mb lg 2017-10-05T17:43:16.800Z 36.4575 -98.8179 34km E of Mooreland, Oklahoma 6.605 3 ml 2017-10-05T02:26:01 .200Z 36.4538 -98 .7737 33km NW of Fairview, Oklahoma 8.342 3 ml 2017-10-05T00:12:01 .000Z 36.4554 -98 .7686 33km NW of Fairview, Oklahoma 8.187 3.3 mwr 2017-10-04T22:06:43.600Z 36.4583 -98 .7619 32km NW of Fairview, Oklahoma 7.701 3.2 mwr 2017-10-01T19:43:43. 900Z 36.204 -97.4235 15km SW of Perry, Oklahoma 8.03 3.3 ml 2017-10-01 T05:48:37 .200Z 36.4575 -98 .7747 33km NW of Fairview, Oklahoma 6.167 3.5 ml 2017-09-28T04:56:33 .800Z 35.9915 -96.8025 3km WNW of Cushing, Oklahoma 5.225 3 ml 2017-09-28T03:56:54.050Z 37.3582 -98.1499 13km NW of Harper, Kansas 5 3.2 mb lg 2017-09-24101 :11 :37.500Z 36.3711 -97.125 17km ENE of Perry, Oklahoma 6.683 3.8 mwr 2017-09-20T06:02:18.600Z 35.5634 -96.7377 9km NNW of Prague, Oklahoma 5 3 ml 2017-09-19122:21 :38.1 ooz 36.4583 -98 .7977 35km NW of Fairview, Oklahoma 6.167 3.4 ml 2017-09-19122: 17:53. 700Z 36.4573 -98 .7991 35km NW of Fairview, Oklahoma 5.377 3.1 ml 2017-09-19T09:43:49.500Z 35.9907 -96.799 2km WNW of Cushing, Oklahoma 5.628 3.3 ml 2017-09-17118:53:00.700Z 35.7926 -96.9842 13km NW of Chandler, Oklahoma 6.254 3.5 ml 2017-09-16T23:26:58.400Z 35.8609 -96.6861 12km NNW of Stroud, Oklahoma 6.664 3.8 mwr 2017-09-15113:04:52.500Z 37.2798 -97.9665 5km E of Harper, Kansas 4.9 3 ml 2017-09-14119:10:48.?00Z 36.291 -97.5125 20km W of Perry, Oklahoma 7.742 3.4 ml 2017-09-14T05:49:37.800Z 36.7402 -98.3656 1km SSW of Cherokee, Oklahoma 7.992 3 ml 2017-09-14104: 14:41 .080Z 37.2788 -97 .9675 5km E of Harper, Kansas 4.96 3.4 ml 2017-09-14T03:40:29.600Z 36.2876 -97.5079 19km W of Perry, Oklahoma 7.302 3.3 ml 2017-09-12120: 10:25.500Z 36.7404 -98 .368 1km SSW of Cherokee, Oklahoma 7.519 3 ml 2017-09-11103:27:05.300Z 35.5637 -96 .7392 9km NNW of Prague, Oklahoma 5 3.6 mwr 2017-09-1 OTO?: 13:56.400Z 35.9918 -96 .804 3km WNW of Cushing, Oklahoma 5.961 3.3 ml 2017-09-09120:4 7:50. 700Z 35.9914 -96.8015 3km WNW of Cushing, Oklahoma 5.85 3.1 ml 2017-09-09111 :34:55.1ooz 36.641 -97.7026 18km S of Medford, Oklahoma 8.008 3 ml 2017-09-08T22:28:21.800Z 36.2872 -97 .5069 19km W of Perry, Oklahoma 6.887 3 ml 2017-09-08102:26:23. 700Z 36.6996 -97.683 12km SSE of Medford, Oklahoma 6.073 4.3 mwr 2017-09-06T03:20:54. 700Z 36.1711 -96.9168 14km ENE of Stillwater, Oklahoma 7.233 3.3 ml 2017-09-04T23:03:01 .300Z 35.6618 -97 .183 1km E of Luther, Oklahoma 5.179 3.7 ml 2017-08-31107:21 :16.520Z 37.5587 -97.7708 7km S of Cheney, Kansas 4.68 3.4 mb lg 2017-08-30T00:43:56.500Z 36.9357 -97 .8898 19km NW of Medford, Oklahoma 4.726 3 ml 2017-08-29117:23:52 .000Z 36.6135 -98.4002 13km WNW of Helena, Oklahoma 5.888 3.5 ml 2017-08-28116:16:17.500Z 36.2837 -97 .5043 19km W of Perry, Oklahoma 6.583 3.4 ml 2017-08-27121 :24:42 .590Z 35.7871 -98 .566 15km WSW of Watonga, Oklahoma 8.47 3.5 mb lg 2017-08-27115:01 : 15. 740Z 37.2495 -97 .565 17km W of Wellington, Kansas 4.53 3 ml 2017-08-25118:52:44. 780Z 36.3583 -98.2003 21 km SSE of Helena, Oklahoma 5 3.2 mb lg 2017-08-25T16:16:47.900Z 36.3621 -98 .1982 21 km SSE of Helena, Oklahoma 7.176 3 ml 2017-08-25111 :50:01 .800Z 36.9374 -97.885 19km NW of Medford, Oklahoma 5.368 3.1 ml Facility Decommissioning Plan - Rev 2 February 2021 Page 7 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 2017 23122 :45: 06. 700Z 35.9808 -97.1979 6km NE of Langston, Oklahoma 7.199 3.2 ml 2017-08-23118:03:54.5002 35.677 -97.4139 6km ENE of Edmond, Oklahoma 5.725 3.6 ml 2017-08-20T18:49:55.4002 35.8636 -96.6837 12km N of Stroud, Oklahoma 6.6 3.1 ml 2017-08-17T03:52:32.000Z 36.1238 -97.8157 7km ENE of Hennessey, Oklahoma 6.958 3.3 mwr 2017-08-15T17:13:16.11 OZ 36.9692 -99.3456 29km ENE of Buffalo, Oklahoma 5 3.1 mb lg 2017-08-15T17:05:10.71 OZ 36.9789 -99.3658 28km NE of Buffalo, Oklahoma 5 3.1 mb lg 2017-08-14T01 :06:52.1 00Z 36.4583 -98.7745 33km NW of Fairview, Oklahoma 6.239 3 ml 2017-08-12T08:51 :13.700Z 36.4571 -98.7807 34km NW of Fairview, Oklahoma 6.46 3 mb lg 2017-08-09T21 :15:30.9402 37.127 -97.6132 10km N of Caldwell, Kansas 6.08 3.7 mwr 2017-08-09T07: 13:36.5202 36.2333 -98.4083 7km ESE of Fairview, Oklahoma 5 3.2 mb lg 2017-08-06T02:38:02.370Z 37.2757 -97.618 12km S of Conway Springs, Kansas 4.46 3 ml 2017-08-05T20:13:00.71 OZ 37.271 -97.6243 13km S of Conway Springs, Kansas 2.94 3.4 ml 2017 05T03 :32:52. 030Z 37.1248 -97.615 10km N of Caldwell, Kansas 4.11 3.4 ml 2017-08-05T03: 14: 10.290Z 37.1268 -97.6168 10km N of Caldwell, Kansas 4.15 3.2 ml 2017-08-03T16:11 :46.400Z 35.6733 -97.4071 6km ENE of Edmond , Oklahoma 5.427 3.5 ml 2017-08-03T14:50:09.4002 35.8639 -96.6759 12km N of Stroud, Oklahoma 6.432 3.5 ml 2017-08-03T11 :05:40.8002 35.8352 -97 .391 5km SSE of Guthrie, Oklahoma 6.034 3.1 ml 2017-08-03T06:40:44.100Z 35 .6745 -97.403 7km ENE of Edmond, Oklahoma 5.767 3.3 mwr 2017-08-03T04:37:59.200Z 36.4554 -98 .7938 34km NW of Fairview, Oklahoma 6.599 3.3 ml 2017-08-03T04:33:51 .900Z 36.4564 -98.795 35km NW of Fairview, Oklahoma 6.503 3.2 ml 2017-08-03T02:56:37 .300Z 35.672 -97.4047 6km ENE of Edmond, Oklahoma 5.031 4.2 mwr 2017-08-02T22:16:37.700Z 35.6717 -97.4056 6km ENE of Edmond, Oklahoma 6.271 3 ml 2017-08-02T20:45:26.900Z 35.6704 -97.4038 7km ENE of Edmond, Oklahoma 6.477 3.3 ml 2017-08-02T07:49:32.800Z 35.6703 -97.4039 6km ENE of Edmond, Oklahoma 6.391 3.3 ml 2017-08-02T05: 18:52.4002 35.673 -97.4057 6km ENE of Edmond, Oklahoma 6.785 3.3 mwr 2017-08-02T02:42:17.800Z 35.669 -97.3985 7km ENE of Edmond, Oklahoma 6.698 3 ml 2017-08-01T19:43:48.4602 36.5374 -98.9612 24km ENE of Mooreland, Oklahoma 9.96 3.1 mwr 2017-08-01 T07:42 :22.100Z 36.4562 -98.8023 35km NW of Fairview, Oklahoma 6.446 3.1 ml 2017-08-01 T06:25: 12.600Z 37.1282 -97 .6122 10km N of Caldwell , Kansas 3.79 3.3 ml 2017-07-30T00:13:45.470Z 38 .0255 -98 .0035 5km W of South Hutchinson, Kansas 3.6 3 mb lg 2017-07-23T17:11 :23.900Z 36.7494 -98.0416 28km E of Cherokee, Oklahoma 7.302 3.3 ml 2017-07-21T12:52:38.4002 35.7986 -96.6506 5km N of Stroud, Oklahoma 6.198 3.3 ml 2017-07-21T11 :58:59.9002 36.9766 -99.3847 26km NE of Buffalo, Oklahoma 7.328 3.1 ml 2017-07-19T00:20:05.300Z 36.0399 -97 .1245 10km SW of Stillwater, Oklahoma 6.381 3.2 mwr 2017-07-18T21 :59:51.3002 35.8642 -96.6838 13km N of Stroud, Oklahoma 6.363 3.2 ml 2017-07-18T02:32:29.600Z 36.6176 -98.4197 15km WNW of Helena, Oklahoma 4.997 3.6 ml 2017-07-17T21 :06:34.2002 36.4454 -97.0626 25km S of McCord, Oklahoma 5.966 3.3 ml 2017-07-17T03:51 :18.700Z 35.8628 -96.6819 12km N of Stroud, Oklahoma 6.806 3.2 ml 2017-07-17T03:29:22.090Z 36.247 -98.4382 4km ESE of Fairview, Oklahoma 2.16 3.2 mb lg 2017-07-15T23: 11 :24.290Z 35.8595 -96.6881 12km NNW of Stroud, Oklahoma 3.3 3 mb lg 2017-07-14T15: 11 :32.300Z 36.0361 -97 .9013 8km S of Hennessey, Oklahoma 4.504 3 ml 2017-07-14T15:04:22.000Z 35.86 -96 .6992 12km NNW of Stroud, Oklahoma 5 3.4 ml 2017-07-14T14:17:50.8002 35.861 -96.6822 12km N of Stroud, Oklahoma 7.052 3.6 mwr 2017-07-14T14:04:50.9002 35.862 -96.6857 12km N of Stroud, Oklahoma 6.831 3.5 mwr 2017-07-14T13:47:35.3002 35 .8591 -96 .6833 12km N of Stroud, Oklahoma 6.813 4.2 mwr 2017-07-13T03:16:56.120Z 36.2834 -97 .5074 19km W of Perry, Oklahoma 3.26 3.3 mwr 2017-07-11T17:22:25.61 oz 37.2315 -97 .972 7km SE of Harper, Kansas 5.16 3.5 ml 2017-07-11 T08:37:34.500Z 36.3026 -96.6712 12km ESE of Pawnee, Oklahoma 2.986 3 ml 2017-07-09T08:59:43.140Z 36.1119 -98.7234 23km ENE of Taloga, Oklahoma 5.27 3 mb lg 2017-07-08T02:51 :23.680Z 36.3009 -96.6908 10km ESE of Pawnee, Oklahoma 7.29 3.4 mb lg 2017-07-06T15:22: 11. 700Z 36 .7659 -97.7631 5km SSW of Medford, Oklahoma 6.031 3.1 mwr 2017-07-01T11 :50:26.91 oz 36.6789 -98 .157 17km NE of Helena, Oklahoma 5 3.1 mb lg 2017-06-30T22:49:07.41 OZ 36.0076 -97.2371 7km NNE of Langston , Oklahoma 3.61 3.2 mb lg 2017-06-29T11 :31 :54.900Z 36.533 -98 .9667 23km ENE of Mooreland, Oklahoma 6.431 3.5 ml 2017-06-27T06:07:54.920Z 36.4723 -97.2848 20km N of Perry, Oklahoma 5 3.3 mb lg 2017-06-22T12:44:51.1702 37.2295 -97.9742 7km SE of Harper, Kansas 4.37 3.7 ml 2017-06-20T22:14:57.61 OZ 37.2747 -98 .13 9km W of Harper, Kansas 3.06 3.1 mb lg 2017-06-19T18: 10:57 .600Z 35.6176 -96.8946 9km S of Chandler, Oklahoma 5 3 ml Facility Decommissioning Plan - Rev 2 February 2021 Page 8 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 2017-06-17112:06:27.7502 35.012 -97.5951 15km SSE of Blanchard, Oklahoma 5.77 3.2 mb lg 2017-06-15107:35:15.3002 36.2848 -97.5067 19km W of Perry, Oklahoma 6.133 3.3 mwr 2017-06-1 0T07:01 :46.360Z 36.4373 -98.7528 30km NW of Fairview, Oklahoma 2.93 3.4 mwr 2017-06-1OT06:26:10.890Z 37.2345 -97.9848 6km SSE of Harper, Kansas 3.78 3.7 ml 2017-06-09112:25:29.3002 35.6372 -98.0396 11 km SSW of Okarche, Oklahoma 6.85 3.2 ml 2017-06-09112:23:51 .2002 36.6087 -97.7451 22km S of Medford, Oklahoma 6.887 3.1 ml 2017-06-08T03:09:37.1DOZ 36.871 -98.8188 15km WNW of Alva, Oklahoma 4.202 3.1 mwr 2017-06-07116:41 :18.000Z 36.2274 -98.4308 6km SE of Fairview, Oklahoma 6.153 3.2 mwr 2017-06-07T02:54:34.800Z 36.4584 -98 .795 35km NW of Fairview, Oklahoma 5.65 3.1 mwr 2017-06-04T18:08: 12.20oz 35.6811 -97.1817 2km NNE of Luther, Oklahoma 4.744 3 ml 2017-06-02114:02:22.4002 36.6987 -97 .6707 13km SSE of Medford, Oklahoma 5.646 3.1 ml 2017-06-01121 :55:09 .7002 36.4715 -98 .7472 32km NW of Fairview, Oklahoma 7.959 3.1 ml 2017-06-01121 :06:08.1 DOZ 36.4569 -98.7903 34km NW of Fairview, Oklahoma 5.108 3.5 ml 2017-06-01118:26:39.7402 37.2347 -97.9817 6km SE of Harper, Kansas 4.59 3.6 ml 2017-05-31T23:20:51.700Z 36.4562 -98 .7973 35km NW of Fairview, Oklahoma 6.12 3.1 ml 2017-05-31T20:05:29.700Z 36.6999 -98.427 8km SW of Cherokee, Oklahoma 4.867 3.2 ml 2017-05-31 T07:03:47.800Z 36.4032 -96 .8796 9km NW of Pawnee, Oklahoma 5 3.1 mwr 2017-05-30123: 12:22.8002 36.2809 -97 .5051 19km W of Perry, Oklahoma 6.718 3.8 mwr 2017-05-30117:50: 11.4002 36.4559 -98.8021 35km NW of Fairview, Oklahoma 6.434 3 ml 2017-05-30113:57:24.000Z 36.2826 -97 .5071 19km W of Perry, Oklahoma 5.525 3.7 mwr 2017-05-30T09:23: 14.9002 36.4575 -98.7966 35km NW of Fairview, Oklahoma 5.855 3 mwr 2017-05-29101 :28:05.5002 36.2168 -98.9332 19km N of Taloga, Oklahoma 3.001 3.1 ml 2017-05-26110:48:12.1 DOZ 35.84 -96.6911 10km NNW of Stroud, Oklahoma 6.438 3.1 ml 2017-05-25116:31 :15.700Z 35.2678 -97.8648 5km WSW of Tuttle, Oklahoma 7.208 3.2 ml 2017-05-24103:4 7:34. 700Z 36.5319 -98.9705 23km ENE of Mooreland, Oklahoma 7.204 3.1 ml 2017-05-21T14:06:15.6002 35.796 -97 .2005 14km N of Luther, Oklahoma 7.058 3.3 mwr 2017-05-20119:25:17.5002 35.874 -96 .64 13km SSW of Drumright, Oklahoma 5.542 3.1 ml 2017-05-19T07:32:49.590Z 37.235 -97.9828 6km SSE of Harper, Kansas 4.39 3.4 ml 2017-05-19101 :04:05.2002 36.8677 -98.8225 15km WNW of Alva, Oklahoma 4.355 3.2 ml 2017-05-16111 :29: 12.6002 36.6998 -98.4305 8km SW of Cherokee, Oklahoma 6.904 3.7 ml 2017-05-15T02:46:39.200Z 35.6178 -96 .8917 9km S of Chandler, Oklahoma 5 3.2 ml 2017-05-13121 :59:29.4002 36.6998 -98.4312 9km SW of Cherokee, Oklahoma 5.53 3.2 ml 2017-05-13113:55:05.2002 36.4771 -98.7385 32km NW of Fairview, Oklahoma 5.794 3.2 ml 2017-05-13T09:06:47.600Z 36.4801 -98.7407 33km NW of Fairview, Oklahoma 6.439 3 ml 2017-05-13T08:32:37.300Z 36.4782 -98.7365 32km NW of Fairview, Oklahoma 5.367 4.2 mwr 2017-05-13T08:20:49.000Z 36.4617 -98.7521 32km NW of Fairview, Oklahoma 5 3 ml 2017-05-12117:54:35.3002 36.4561 -98.7885 34km NW of Fairview, Oklahoma 5.269 3.4 ml 2017-05-12116:37:04.8002 36.4562 -98.7888 34km NW of Fairview, Oklahoma 5.832 3.6 ml 2017-05-12113: 15: 15.4002 36.4566 -98.7929 34km NW of Fairview, Oklahoma 5.57 3.2 ml 2017-05-09114:30:05.1 DOZ 36.6019 -97.6111 25km SSE of Medford, Oklahoma 7.987 3.4 ml 2017-05-07121 :39:53.5002 36.9197 -98.1299 27km SSW of Anthony, Kansas 7.514 3 ml 2017-05-07121 :08:21.1 DOZ 36.9182 -98.1294 27km SSW of Anthony, Kansas 8.274 3.3 ml 2017-05-07117:01: 14.6002 36.9202 -98.1295 27km SSW of Anthony, Kansas 9.898 3 ml 2017-05-07116:52:07.4002 36.6013 -97 .6169 25km SSE of Medford, Oklahoma 6.359 3.2 ml 2017-05-05111 :21 :07 .600Z 36.2183 -97 .5683 26km WSW of Perry, Oklahoma 6.602 3 ml 2017-05-04T23: 36 :4 7. 950Z 37.2278 -97 .8698 15km ESE of Harper, Kansas 4.28 3.7 ml 2017-05-04T23:33:09.000Z 35.7936 -97 .1923 14km N of Luther, Oklahoma 5.502 3.1 ml 2017-04-29109:48: 15.5002 36.6999 -97.6698 13km SSE of Medford, Oklahoma 8.594 3.3 mwr 2017-04-28101 :40:56.5002 36.4613 -98.7675 33km NW of Fairview, Oklahoma 4.806 3.2 ml 2017-04-28101 :23:47.6002 35.7991 -96.6522 5km N of Stroud, Oklahoma 7.112 3 ml 2017-04-26116:29: 12.9002 36.698 -97.6711 13km SSE of Medford, Oklahoma 6.452 3 ml 2017-04-26T00:46:30.600Z 36.4763 -98.7432 32km NW of Fairview, Oklahoma 8.292 3 ml 2017-04-25120: 16: 14.700Z 35.5926 -97.3733 7km N of Spencer, Oklahoma 4.606 3.3 ml 2017-04-25112:40:25.2002 36.8214 -97 .776 4km WNW of Medford, Oklahoma 1.129 3 ml 2017-04-25107:57: 12.1 DOZ 35.5902 -97.3731 7km N of Spencer, Oklahoma 5.187 3 ml 2017-04-24122: 13:34. 700Z 36.7908 -98.2712 8km ENE of Cherokee, Oklahoma 3.377 3.3 ml 2017-04-22T14:54:51 .500Z 36.7037 -97.6681 12km SSE of Medford, Oklahoma 8.292 3.6 ml 2017-04-22114:47:22.000Z 36.7033 -97.67 12km SSE of Medford, Oklahoma 6.009 3 ml Facility Decommissioning Plan - Rev 2 February 2021 Page 9 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 2017-04-20113:38: 14.600Z 36.3613 -98.1568 22km SSE of Helena, Oklahoma 4.868 3.2 ml 2017-04-20T04:33:06.500Z 36.7002 -97.6673 13km SSE of Medford, Oklahoma 7.984 3.1 ml 2017-04-18T13:27:30.800Z 36.2082 -97.4265 15km SW of Perry, Oklahoma 8.009 3 ml 2017-04-18T04:36:28.500Z 36.4315 -96.9094 14km NW of Pawnee, Oklahoma 4.183 3 ml 2017-04-16T09:57:04.1 00Z 36.2071 -97.4255 15km SW of Perry, Oklahoma 6.468 3.1 ml 2017-04-16T06:29:30.500Z 36.2055 -97.4246 15km SW of Perry, Oklahoma 8.094 3.5 ml 2017-04-13T11 :32:37.400Z 36.7013 -97.6729 12km SSE of Medford, Oklahoma 8.595 3.1 ml 2017-04-13T10:36:27. 900Z 36.7015 -97.6705 12km SSE of Medford, Oklahoma 9.879 3.2 mwr 2017-04-09T22:08:54.600Z 36.919 -98.1266 27km SSW of Anthony, Kansas 8.102 3 ml 2017-04-09T01 :47:31.900Z 36.214 -97.014 11 km NNE of Stillwater, Oklahoma 7.269 3.4 mwr 2017-04-07T14:56:33.000Z 36.4453 -98.7923 34km NW of Fairview, Oklahoma 6.222 3 ml 2017-04-07T10: 13:27.400Z 36.4418 -98.7823 33km NW of Fairview, Oklahoma 7.591 3.1 ml 2017-04-07T08:01 :09.500Z 36.5327 -98.971 23km ENE of Mooreland, Oklahoma 6.061 3.2 ml 2017-04-05T19:58:28.000Z 36.419 -96 .9144 13km NW of Pawnee, Oklahoma 5.282 3 ml 2017-04-05T08: 14:35.700Z 36.5069 -98.238 5km SSE of Helena, Oklahoma 7.572 3.3 ml 2017-04-05T00:09:49.100Z 35.9867 -97 .1955 7km NE of Langston, Oklahoma 7.562 3.3 ml 2017-04-04T23:49:52.400Z 35.9885 -97.1934 7km NE of Langston, Oklahoma 7.515 3.5 ml 2017-04-02T08: 10: 12.300Z 36.8363 -98.2782 11 km NE of Cherokee, Oklahoma 5.963 3 ml 2017-03-29T15:37:40. 700Z 36 .815 -97 .6114 10km E of Medford, Oklahoma 2.767 4.1 mwr 2017-03-28T04:25:25.700Z 36 .1239 -98.7321 22km ENE of Taloga , Oklahoma 5.552 3 ml 2017-03-25T20:38:44.300Z 36.6835 -97 .757 13km S of Medford, Oklahoma 8.301 3.8 mwr 2017-03-25T11 :44: 13.600Z 36.2746 -97.5636 24km W of Perry, Oklahoma 6.343 3 ml 2017-03-25T11 :33:12.400Z 36.2751 -97.5659 25km W of Perry, Oklahoma 6.72 3.1 ml 2017-03-25T11 :05:34.400Z 36.2757 -97.5625 24km W of Perry, Oklahoma 7.29 3.6 ml 2017-03-24T16:55:34.900Z 36.137 -97.8224 7km ENE of Hennessey, Oklahoma 5.655 3.6 ml 2017-03-24T04:50:58.400Z 35.7279 -97.1494 8km NNE of Luther, Oklahoma 5.666 3.1 ml 2017-03-22T14:00:09.1 00Z 35.8537 -96.6512 11 km N of Stroud, Oklahoma 4.708 3.7 mwr 2017-03-20T18:47:13.000Z 36.9185 -98.129 27km SSW of Anthony, Kansas 10.186 3.1 ml 2017-03-16T08:57:59.600Z 36.7011 -98.4288 8km SW of Cherokee, Oklahoma 6.118 3.8 ml 2017-03-15T19: 14:35.200Z 35.9008 -98.2878 12km ENE of Watonga, Oklahoma 6.871 3.4 ml 2017-03-15T15:16:47.500Z 36.4008 -96.8841 10km NW of Pawnee, Oklahoma 5 3.5 ml 2017-03-15T04:51 :56.200Z 36.4185 -98.1339 18km SE of Helena, Oklahoma 7.929 3.1 ml 2017-03-09T23:49:28.120Z 37.073 -97.983 9km SSE of Anthony, Kansas 7.53 3.2 ml 2017-03-08T22:30:20.800Z 36.4918 -98.8963 28km ENE of Mooreland, Oklahoma 5.196 3.8 ml 2017-03-07T20:51 :27.400Z 36.4227 -96 .9155 13km NW of Pawnee, Oklahoma 5.513 3 ml 2017-03-07T16:06:01.200Z 36.6997 -97.6783 12km SSE of Medford, Oklahoma 8.147 3.2 mwr 2017-03-07T16:03:09.400Z 36.6993 -97.6804 12km SSE of Medford, Oklahoma 7.988 3.3 ml 2017-03-05T12:09: 16.200Z 35.8996 -98.2899 12km ENE of Watonga, Oklahoma 5 3.2 ml 2017-03-04T16:08:38.1 00Z 35.6692 -97.3932 7km ENE of Edmond, Oklahoma 6.825 3 ml 2017-03-03T02:38:27.000Z 36.6646 -99.1271 25km NNE of Mooreland, Oklahoma 5.832 3.3 ml 2017-03-02T20:27:29.000Z 36.5278 -98.9756 22km ENE of Mooreland, Oklahoma 6.208 3.5 ml 2017-03-02T16:43:39.800Z 36 .5359 -98 .9643 24km ENE of Mooreland, Oklahoma 5.741 3.3 ml 2017 02T0O: 30 :40. 600Z 35.8428 -96.6459 10km N of Stroud, Oklahoma 5.952 3.3 ml 2017-03-01T19:49:55.300Z 36.4829 -98.763 34km NW of Fairview, Oklahoma 4.768 3.1 ml 2017-03-01 T05:25:22.600Z 36.4434 -98.7855 33km NW of Fairview, Oklahoma 7.462 3.4 ml 2017-02-25T17:31 :02.000Z 36.2145 -97.5568 25km WSW of Perry, Oklahoma 7.252 3.4 ml 2017-02-24T18:47:20.1 O0Z 36.4876 -97.7636 14km NE of Enid, Oklahoma 7.457 3 ml 2017-02-22T16:31 :46.670Z 37.227 -97.9745 8km SE of Harper, Kansas 4.09 3.4 ml 2017-02-22T08:57:35.400Z 36.7675 -97.6396 9km ESE of Medford, Oklahoma 8.799 3.4 ml 2017-02-21 T08:05:41 .200Z 36.5339 -98.9738 23km ENE of Mooreland, Oklahoma 6.377 3.1 ml 2017-02-16T15:33:07.300Z 36 .1266 -96.864 14km W of Yale, Oklahoma 6.207 3.3 mwr 2017-02-13T21 :39:58.870Z 37.0653 -97 .3763 20km E of Caldwell, Kansas 7.94 3.3 mb lg 2017-02-12T17:37:24.900Z 36.298 -96.6798 11 km ESE of Pawnee, Oklahoma 3.561 3.1 ml 2017-02-12T16:31 :50.100Z 37.3633 -98.1158 11 km NW of Harper, Kansas 6.35 3.1 mb lg 2017-02-11T11 :12: 19.700Z 36.3599 -98.1599 22km SSE of Helena, Oklahoma 7.955 3.1 ml 2017-02-08T22:20:43.41 OZ 37.0467 -97.3834 19km E of Caldwell, Kansas 3.62 3 mb lg 2017-02-08T01: 18:41.800Z 36.8736 -98.0954 26km ENE of Cherokee, Oklahoma 5.638 3 ml 2017-02-06T20:53:53. 700Z 36.4199 -96.8941 12km NW of Pawnee, Oklahoma 6.287 3.4 ml Facility Decommissioning Plan - Rev 2 February 2021 Page 10 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 2017-02-04T11 : 19:41. 900Z 36.8792 -98 .0093 25km WNW of Medford, Oklahoma 7.4 3.2 ml 2017-02-03T15:04: 12.400Z 36.5297 -98.9761 22km ENE of Mooreland , Oklahoma 5.982 3.2 ml 2017-02-02T01:58:10.300Z 36.29 -97 .5072 19km W of Perry, Oklahoma 3.67 3.2 ml 2017-01-31T19:49:39.220Z 36.5369 -98.9758 23km ENE of Mooreland, Oklahoma 10.09 3 mb lg 2017-01-30T16:55:33.900Z 36.7918 -97 .7296 1km SSE of Medford, Oklahoma 7.934 3 ml 2017-01-30T05:34:21.200Z 36.8704 -97.4489 16km WNW of Blackwell, Oklahoma 3.007 3.1 ml 2017-01-29T23:09:00.000Z 36.6995 -98.4304 8km SW of Cherokee, Oklahoma 6.59 3 ml 2017-01-28T03:54:00.300Z 36.1704 -97.2684 13km S of Perry, Oklahoma 7.993 3 ml 2017-01-27T09:51 :17.600Z 36.93 -97.6463 11 km SSW of Caldwell, Kansas 6.705 3.2 ml 2017-01-26T12:02:32.000Z 36.3863 -97 .701 15km E of Enid, Oklahoma 6.054 3.2 ml 2017-01-25T19:44: 15.400Z 36.6684 -97 .581 20km SE of Medford, Oklahoma 8.292 3 ml 2017-01-25T03:51 :31.500Z 36.271 -97.3808 8km WSW of Perry, Oklahoma 7.971 3.1 ml 2017-01-24T20:20:20.700Z 35.6253 -97.1719 4km SSE of Luther, Oklahoma 5 3 ml 2017-01-23T21 :21 :08.500Z 36.7658 -98.0675 25km E of Cherokee, Oklahoma 6.589 3.1 ml 2017-01-22T08:21 :00.500Z 36.4432 -96 .9735 19km NW of Pawnee , Oklahoma 3.94 3 ml 2017-01-19T21 :30:04.900Z 36.7629 -98.0624 26km E of Cherokee, Oklahoma 7.678 3.3 ml 2017-01-15T05: 19:46.900Z 36.4493 -98 .7751 33km NW of Fairview, Oklahoma 7.503 3.4 ml 2017-01-11T21 :34:27.500Z 36.5297 -98.98 22km ENE of Mooreland, Oklahoma 6.147 3.1 ml 2017-01-1 0T06:22:29.600Z 36.4174 -98.1347 18km SE of Helena, Oklahoma 5.866 3.3 ml 2017-01-09T20:39:59.900Z 36 .7026 -97.6719 12km SSE of Medford, Oklahoma 7.798 3.2 mwr 2017-01-08T02:02:36.900Z 36 .9138 -97.5796 13km S of Caldwell, Kansas 6.624 3 ml 2017-01-05T02:55 :34.300Z 35.6703 -97 .3995 7km ENE of Edmond, Oklahoma 7.069 3.1 ml 2017-01-02T19:44:23.000Z 36.4199 -96 .9186 13km NW of Pawnee, Oklahoma 3.044 3.5 ml 2017-01-02T15:28:40.1 00Z 36.3961 -96.8858 9km NW of Pawnee, Oklahoma 4.241 3.4 ml 2017-01-02T15:25:35.000Z 36.3968 -96 .8859 9km NW of Pawnee, Oklahoma 4.152 3.3 ml 2017-01-01 T06:43:01.400Z 36.2856 -97 .5017 19km W of Perry, Oklahoma 4.179 3 ml 2016-12-30T20: 12:44.900Z 36.2667 -97.3454 5km WSW of Perry, Oklahoma 6.352 3.1 ml 2016-12-29T23: 18:54.200Z 35.6733 -97 .396 7km ENE of Edmond, Oklahoma 5.717 3.2 ml 2016-12-29T23:18:41 .700Z 35.6699 -97.3975 7km ENE of Edmond, Oklahoma 6.68 3 ml 2016-12-28T04:14:22.200Z 36.4444 -98 .7774 33km NW of Fairview, Oklahoma 5.147 3.4 ml 2016-12-24T04:08:52.300Z 36.3993 -96.8885 10km NW of Pawnee, Oklahoma 4.53 3.6 ml 2016-12-24T02:24:35.300Z 36.5286 -98.9709 23km ENE of Mooreland, Oklahoma 5.56 3 ml 2016-12-23T21 :30:59.200Z 36.5311 -98.9679 23km ENE of Mooreland, Oklahoma 4.537 3.4 ml 2016-12-23T20:45:05.300Z 36.5341 -98.9667 23km ENE of Mooreland, Oklahoma 6.012 3.4 ml 2016-12-22T14:46:56.680Z 37.2285 -97.8685 15km ESE of Harper, Kansas 4.45 3.1 ml 2016-12-22T14:21 :44.700Z 35.6705 -97.4011 7km ENE of Edmond, Oklahoma 6.842 3.3 ml 2016-12-22T01 :58:57.000Z 36.4457 -98.7749 32km NW of Fairview, Oklahoma 6.072 3 ml 2016-12-20T14:03:07.200Z 36.1717 -96.7699 9km NW of Yale, Oklahoma 4.264 3.2 ml 2016-12-20T09:32: 19.400Z 34.6053 -96.2282 7km N of Coalgate, Oklahoma 4.796 3.1 ml 2016-12-20T05:03:26.1 00Z 36.4445 -98 .7802 33km NW of Fairview, Oklahoma 7.45 3.5 ml 2016-12-19T08:29:49.300Z 36.5359 -98.9646 24km ENE of Mooreland, Oklahoma 5.638 3.1 ml 2016-12-18T07:46:29.400Z 36.305 -96.6661 12km ESE of Pawnee, Oklahoma 3.032 3 ml 2016-12-18T05:52:59.800Z 35.6707 -97.3981 7km ENE of Edmond, Oklahoma 6.739 3.7 ml 2016-12-18T01 :03:20.000Z 36.3957 -97 .3251 12km NNW of Perry, Oklahoma 8.009 3.3 ml 2016-12-17T05:04:30.220Z 37.258 -97.8772 13km ESE of Harper, Kansas 4.59 3 ml 2016-12-16T23:06:32. 700Z 36.3888 -96 .7362 8km NE of Pawnee, Oklahoma 2.75 3.1 ml 2016-12-14T19:12:42.200Z 36.6713 -97 .7342 15km S of Medford, Oklahoma 7.968 3.2 ml 2016-12-12T05:08:17.500Z 36.4516 -98 .7747 33km NW of Fairview, Oklahoma 8.162 3.2 ml 2016-12-11T11 :53:32.500Z 36 .284 -97 .5081 19km W of Perry, Oklahoma 6.252 3.2 ml 2016-12-1OT18:38:34.900Z 36.5356 -98.9725 23km ENE of Mooreland, Oklahoma 6.907 3.2 ml 2016-12-1 0T08:07:01.400Z 36.3413 -97.9016 6km SSW of Enid, Oklahoma 6.931 3.4 mwr 2016-12-07T17:39:41 .500Z 36.2848 -97 .5061 19km W of Perry, Oklahoma 7.244 3 ml 2016-12-06T15:41 :37.900Z 36.1202 -96.7023 0km NNW of Yale, Oklahoma 5.011 3.2 mwr 2016-12-05T17:39: 11.400Z 36.2567 -97.4697 16km WSW of Perry, Oklahoma 8.533 3.3 ml 2016-12-05T08:58:31.000Z 36.0207 -96.7463 4km NNE of Cushing, Oklahoma 4.194 3.2 mwr 2016-12-05T03:22:55.700Z 36.3077 -96.6617 13km ESE of Pawnee, Oklahoma 3.538 3.8 mwr 2016-11-27T14:34:47.000Z 36.7655 -97 .5994 12km ESE of Medford, Oklahoma 7.995 3.6 ml 2016-11-25T15: 19:35. 700Z 36.8434 -97.7522 4km NNW of Medford, Oklahoma 7.893 4 mb Facility Decommissioning Plan - Rev 2 February 2021 Page 11 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 2016-11-24T16:34:06.6002 35.9931 -96.7981 2km WNW of Cushing, Oklahoma 5.707 3.6 ml 2016-11-24T08:18:29.6002 36.214 -96.981 12km NNE of Stillwater, Oklahoma 5.202 3.5 ml 2016-11-22T17:07:30.8002 36.8438 -97 .8332 9km WNW of Medford, Oklahoma 5.151 3 ml 2016-11-22T09:55:33.3002 36.0066 -96.7687 2km N of Cushing , Oklahoma 4.44 3.5 mwr 2016-11-19T11:38:54.1002 36.4459 -98 .7789 33km NW of Fairview, Oklahoma 6.897 3 ml 2016-11-19T03:05:28.9002 36.443 -98.7831 33km NW of Fairview, Oklahoma 7.323 3 ml 2016-11-15T12:04:46.4002 36.2936 -96 .6869 11 km ESE of Pawnee, Oklahoma 3.637 3 ml 2016-11-14T15:07:38.8002 36.4522 -98 .794 34km NW of Fairview, Oklahoma 5.902 3 ml 2016-11-14T14:41 :50.9002 36.3029 -96.6713 12km ESE of Pawnee, Oklahoma 2.843 3.3 ml 2016-11-14T00:30:00.9002 36.454 -98.7935 34km NW of Fairview, Oklahoma 6.24 3.1 ml 2016-11-12T16:39:41.1002 35.9886 -96 .8065 3km W of Cushing, Oklahoma 6.012 3.3 ml 2016-11-11T15:49:57 .0002 35.6826 -97 .0686 11 km ENE of Luther, Oklahoma 6.483 3.3 ml 2016-11-11T11 :12:36.4002 36.9461 -97 .891 20km NW of Medford, Oklahoma 6.267 3.3 ml 2016-11-11T08:54:43.4002 35.5734 -98.1395 17km WNW of El Reno, Oklahoma 6.362 3.4 ml 2016-11-11T00:08:05.2002 35.9862 -96 .8103 3km W of Cushing, Oklahoma 5.334 3.1 ml 2016-11-09T02:15:37.0002 36.9445 -97.8973 21 km NW of Medford, Oklahoma 5.943 3.7 mwr 2016-11-08T20:27:05.5002 36.4163 -97.3526 15km NNW of Perry, Oklahoma 7.081 3.3 ml 2016-11-07T13:43:17.4002 36.4723 -98.7498 33km NW of Fairview, Oklahoma 7.638 3.3 ml 2016-11-07T08:46:44.3002 35.4968 -97.3076 1km ENE of Nicoma Park, Oklahoma 6.544 3 ml 2016-11-07T07:33:59.6002 36.4564 -98 .7622 32km NW of Fairview, Oklahoma 7.944 4.1 mb 2016-11-07T04:52:35.6702 37.3738 -97 .735 8km WSW of Conway Springs, Kansas 2.03 3.1 mb lg 2016-11-07T01 :52:32.9002 36.0062 -96.7679 2km N of Cushing, Oklahoma 5.36 3 ml 2016-11-07T01 :44:24.5002 35.9907 -96 .803 3km W of Cushing, Oklahoma 4.43 5 mww 2016-11-06T19:43:07.6002 36.3665 -97.0732 21 km ENE of Perry, Oklahoma 5.898 3 ml 2016-11-06T03:20:43.7002 36.2505 -97.2196 7km SE of Perry, Oklahoma 7.873 3.4 mwr 2016-11-05T09:39:44.1002 36.3038 -96.671 12km ESE of Pawnee, Oklahoma 3.919 3.3 mwr 2016-11-04T23:06:44.9002 36.1495 -97.6595 21 km ENE of Hennessey, Oklahoma 5.368 3.3 ml 2016-11-02T15:10:43.7002 36.3001 -96.6744 12km ESE of Pawnee, Oklahoma 3.914 3.1 ml 2016-11-02T04:26:54.0002 36.3047 -96.6657 12km ESE of Pawnee, Oklahoma 4.349 4.4 mwr 2016-11-02T00:48:29.1002 36.1479 -97.6578 22km ENE of Hennessey, Oklahoma 4.489 3 ml 2016-11-02T00:20:59.9002 35.5673 -98.1261 15km WNW of El Reno, Oklahoma 3.687 3.3 ml 2016-11-02T00:10:05.5002 35.5692 -98.1286 16km WNW of El Reno, Oklahoma 4.705 3.1 ml 2016-10-31T03:27:03.9002 36.2856 -97.5073 19km W of Perry, Oklahoma 8.161 3.4 mwr 2016-10-31T02:53:27.7002 36.4327 -96.9085 14km NW of Pawnee, Oklahoma 4.506 3 ml 2016-10-30T19:26:46.4002 36.251 -97.2213 7km SE of Perry, Oklahoma 7.978 3.3 ml 2016-10-30T10:21 :02 .2002 36.3126 -97.0419 21 km N of Stillwater, Oklahoma 6.788 3.4 mwr 2016-10-29T11 :50:23.3002 36.5715 -97.3821 13km SSW of Tonkawa, Oklahoma 8.244 3.2 ml 2016-10-29T11 :44:53.5002 36.5707 -97 .3888 13km SSW of Tonkawa, Oklahoma 6.3 3.1 ml 2016-10-29T06:06:01 .8002 36.4008 -96 .8854 10km NW of Pawnee, Oklahoma 4.57 3.3 ml 2016-10-28T18:24:54.7002 36.4387 -96.8916 13km NW of Pawnee, Oklahoma 4.542 3.1 ml 2016-10-28T15:50:39.6002 36.7584 -98.0587 26km E of Cherokee, Oklahoma 7.412 3 ml 2016-10-27T06:08:39.0002 35.6579 -97.1556 3km E of Luther, Oklahoma 5.701 3.6 ml 2016-10-26T06:19:03.5002 36.3315 -97.5195 21 km WNW of Perry, Oklahoma 7.988 3.5 ml 2016-10-24T13:25:55.0202 37.1583 -97 .8237 18km E of Anthony, Kansas 4.78 3.5 ml 2016-10-24T00:33:34.2002 36.8173 -97.5462 16km E of Medford, Oklahoma 7.951 3.3 ml 2016-10-22T13:03: 13.8002 36.6502 -99 .0777 26km NNE of Mooreland, Oklahoma 4.666 3.1 ml 2016-10-21T22:54:31.7002 36.4427 -98.7844 33km NW of Fairview, Oklahoma 7.334 3.2 ml 2016-10-21T22:48:18.3002 36.4439 -98.7815 33km NW of Fairview, Oklahoma 7.321 3 ml 2016-10-21T20:47:39.4002 36.4449 -98.779 33km NW of Fairview, Oklahoma 7.396 3.4 mwr 2016-10-21 T20:33:56. 7002 36.4507 -98 .7752 33km NW of Fairview, Oklahoma 7.346 3.1 ml 2016-10-21T20:26:00.5002 36.4493 -98 .7758 33km NW of Fairview, Oklahoma 7.081 4 mwr 2016-10-21 T20:25:35. 7802 36.4642 -98.3036 9km SSW of Helena, Oklahoma 5 3.8 mb lg 2016-10-20T17:09:07.9002 35.8445 -97.372 6km SE of Guthrie, Oklahoma 6.061 3 ml 2016-10-20T12:14:07.9002 36.9295 -97.644 11 km SSW of Caldwell , Kansas 5.448 3.4 mwr 2016-10-19T22:54:14.0002 36.4793 -98.7937 36km NW of Fairview, Oklahoma 5.263 3.1 ml 2016-10-19T22:33:35.1002 36.7643 -97.7671 5km SSW of Medford, Oklahoma 7.977 3.1 mwr 2016-10-19T12:04:51.5002 36.4144 -96 .8699 10km NW of Pawnee, Oklahoma 5.117 3 ml 2016-10-19T07:06:29.4002 36.5225 -98 .3547 8km WSW of Helena, Oklahoma 6.587 3.1 ml Facility Decommissioning Plan - Rev 2 February 2021 Page 12 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 2016-10-18T04:04:41.170Z 35.6617 -97.4002 7km E of Edmond, Oklahoma 4.55 3 mb lg 2016-10-17T18:56:54.6002 35.8678 -96.6821 13km N of Stroud, Oklahoma 6.635 3 ml 2016-10-15T14:11 :20.200Z 36.3744 -97.7133 14km E of Enid, Oklahoma 4.967 3.1 ml 2016-10-14T11 :50:31.3002 36.5091 -99.0685 14km ENE of Mooreland, Oklahoma 5.916 3.2 ml 2016-10-13T02:48:41.500Z 36.7911 -98.3328 4km NNE of Cherokee, Oklahoma 6.164 3.3 mwr 2016-10-1 or21:55:10.00oz 36.4184 -98.1409 18km SE of Helena, Oklahoma 7.943 3 ml 2016-10-1 0T20:27:55.000Z 36.4362 -96.9028 14km NW of Pawnee, Oklahoma 3.839 3.2 ml 2016-10-1OT15:44: 10.800Z 36.4474 -98.7783 33km NW of Fairview, Oklahoma 7.864 3 ml 2016-10-09T20:07:22.800Z 36.5057 -99.066 14km ENE of Mooreland, Oklahoma 5.663 3 ml 2016-10-09T12:23:05.1 00Z 36.4171 -96.8917 11 km NW of Pawnee, Oklahoma 4.466 3.5 mwr 2016-10-08T11 : 10:29.400Z 36.4516 -98.7704 33km NW of Fairview, Oklahoma 7.995 3.3 ml 2016-10-06T10:53: 18.400Z 36.8215 -97.5453 16km E of Medford, Oklahoma 9.012 3.6 ml 2016-10-06T00:19:04.000Z 36.4197 -96.9174 13km NW of Pawnee, Oklahoma 4.167 3.4 ml 2016-10-05T16:45:59.100Z 36.4447 -98.7825 33km NW of Fairview, Oklahoma 7.707 3.2 ml 2016-10-05T16:01 :08 .300Z 35.8637 -96 .6823 12km N of Stroud, Oklahoma 5.947 3 ml 2016-10-05T15:02:26.4002 36.445 -98.7781 33km NW of Fairview, Oklahoma 7.231 3.3 mwr 2016-10-05T13:46:10.500Z 36.4608 -99.1555 5km ENE of Mooreland, Oklahoma 4.079 3 ml 2016-10-05T09:54:33.1DOZ 36.4065 -96.938 14km WNW of Pawnee , Oklahoma 5.796 3 ml 2016-10-04T13: 10:44.4002 35.8633 -96.6822 12km N of Stroud, Oklahoma 5.868 3.3 ml 2016-10-04T09:10:37.9002 36.4275 -96.9394 15km NW of Pawnee, Oklahoma 5.76 3.7 ml 2016-10-02T03:51 :09.900Z 36.2139 -97.5672 26km WSW of Perry, Oklahoma 6.321 3.2 ml 2016-09-30T05:45:36.100Z 36.5034 -99.0645 14km ENE of Mooreland, Oklahoma 6.418 3.3 ml 2016-09-29T18:08:35.2002 36.2779 -98.4064 6km E of Fairview, Oklahoma 5.754 3.1 mwr 2016-09-29T06:24:55.000Z 36.3761 -96.94 12km WNW of Pawnee, Oklahoma 5.926 3.1 ml 2016-09-27T06:09:59 .81 OZ 36.5093 -97.2556 19km SSE of Tonkawa, Oklahoma 2.15 3 mb lg 2016-09-26T23:30:51.600Z 36.8174 -98.2727 10km NE of Cherokee, Oklahoma 6.764 3.8 ml 2016-09-26T15:47:03.3002 36.0912 -97.4441 20km NE of Crescent, Oklahoma 6.995 3.4 ml 2016-09-24T22:41 :29.400Z 35.9798 -97 .1997 6km NE of Langston, Oklahoma 5.816 3.3 mwr 2016-09-23T08:28:17.800Z 36.42 -96.906 12km NW of Pawnee, Oklahoma 3.3 3 ml 2016-09-21 T06: 18:48.2002 35 .8531 -97.2346 10km S of Langston, Oklahoma 6.159 3.2 mwr 2016-09-20T18:40:07.5002 36 .9344 -97.9058 20km NW of Medford, Oklahoma 5.562 3.1 ml 2016-09-20T04:59: 10.800Z 36.9375 -97.906 21 km NW of Medford, Oklahoma 5.295 3.9 mwr 2016-09-18T18:30:34.6002 36.281 -97.5116 20km W of Perry, Oklahoma 6.939 3.2 ml 2016-09-17T06:18:53.3002 36.7021 -97.7395 11 km S of Medford, Oklahoma 6.358 3 ml 2016-09-17T06:08:07.700Z 36.8673 -98 .3474 12km N of Cherokee, Oklahoma 5.564 3.5 ml 2016-09-16T23:55:33.300Z 36.4595 -98.759 32km NW of Fairview, Oklahoma 7.683 3.9 ml 2016-09-16T18:01 :28.000Z 36.7824 -98.561 9km ESE of Alva, Oklahoma 5 3 ml 2016-09-14T22:43:57 .200Z 35.6691 -97.4022 7km ENE of Edmond, Oklahoma 7.304 3.2 ml 2016-09-14T17: 13:44.9002 36.451 -98.7703 32km NW of Fairview, Oklahoma 7.783 3.7 mwr 2016-09-13T17:45: 18.200Z 36 .7819 -97.8178 8km WSW of Medford, Oklahoma 6.784 3.3 ml 2016-09-13T16: 18:00.5802 37.3628 -98.0942 10km NW of Harper, Kansas 8.44 3.3 ml 2016-09-13T15:09: 14.400Z 36.7791 -97.8203 8km WSW of Medford, Oklahoma 5.781 3 ml 2016-09-13T02:15:21 .300Z 36.2466 -98.4464 3km SE of Fairview, Oklahoma 6.105 3.7 ml 2016-09-13T02:05:48.200Z 36.2452 -98.4476 3km SE of Fairview, Oklahoma 6.022 3.3 mwr 2016-09-12T21 :39: 14.500Z 36.4316 -96.9089 14km NW of Pawnee, Oklahoma 4.376 3 ml 2016-09-12T05:54: 12.700Z 36.4068 -96 .8542 8km NNW of Pawnee, Oklahoma 5.267 3 ml 2016-09-1 0T11 :38:25.7002 35.8799 -97 .1226 13km SW of Perkins, Oklahoma 4.673 3.2 ml 2016-09-09T22:51 :28.21 OZ 36.0947 -96.7449 4km WSW of Yale, Oklahoma 5 3.1 mb lg 2016-09-09T22:35:35.200Z 36 .7216 -98.3926 4km SW of Cherokee, Oklahoma 4.121 3 ml 2016-09-09T17:31 :40.900Z 36.3163 -96.9678 14km W of Pawnee, Oklahoma 6.846 3.7 ml 2016-09-09T02:06:29.1 DOZ 35.5166 -97.3974 1km WSW of Spencer, Oklahoma 7.481 3.5 mwr 2016-09-09T00:21 :33.200Z 36.3955 -97 .2956 11 km N of Perry, Oklahoma 6.527 3 ml 2016-09-08T21 :38:43.4002 36 .1683 -97.048 5km N of Stillwater, Oklahoma 6.014 3.1 ml 2016-09-08T21 :34:43.1 DOZ 36.1674 -97.0459 5km N of Stillwater, Oklahoma 5.942 3.2 ml 2016-09-08T21 :29:29.000Z 36.286 -97 .5077 19km W of Perry, Oklahoma 5.131 3.3 mwr 2016-09-07T21 :04:24.9002 36.9445 -97.9005 21 km NW of Medford, Oklahoma 4.378 3.3 ml 2016-09-07T02:26:50.500Z 36.4326 -96.908 14km NW of Pawnee, Oklahoma 4.444 3.1 mwr 2016-09-06T18:33:49.2002 36.9371 -97.9073 21 km NW of Medford, Oklahoma 4.881 3.5 ml Facility Decommissioning Plan - Rev 2 February 2021 Page 13 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 2016-09-06T17:49:45.040Z 36 .9241 -97 .9341 22km NW of Medford, Oklahoma 9.53 3.7 mb lg 2016-09-06T17:48:34 .200Z 36.9372 -97.9125 21 km NW of Medford, Oklahoma 4.448 3.9 mwr 2016-09-05T21 :15:46.200Z 36.3557 -97.4312 14km WNW of Perry, Oklahoma 5 3.1 ml 2016-09-04T20:03:06.900Z 36.038 -96 .7809 6km NNW of Cushing, Oklahoma 5.06 3.1 ml 2016-09-04T14:29:23.100Z 36.4299 -96.9211 14km NW of Pawnee, Oklahoma 8.137 3 ml 2016-09-04T12:56:04 .900Z 36.4124 -96.8891 11 km NW of Pawnee, Oklahoma 1.47 3 ml 2016-09-04T04:20:28.000Z 36.3195 -96.965 14km W of Pawnee, Oklahoma 5.972 3.2 ml 2016-09-04T03: 55 :46 .400Z 36 .0387 -96.7784 6km N of Cushing, Oklahoma 5.159 3.2 ml 2016-09-04T03: 15:56.400Z 36.4155 -96.8844 11 km NW of Pawnee, Oklahoma 3.551 3.1 ml 2016-09-03T23:56:36.600Z 36.4148 -96.8557 9km NNW of Pawnee, Oklahoma 8.275 3 ml 2016-09-03T20:50:24.700Z 36 .3118 -96.9725 15km W of Pawnee, Oklahoma 5.254 3 ml 2016-09-03T18:38:51 .900Z 36 .2137 -97.5725 26km WSW of Perry, Oklahoma 6.32 3 ml 2016-09-03T15:31 :40.900Z 36.4187 -96.8838 11 km NW of Pawnee, Oklahoma 6.47 3.4 ml 2016-09-03T14:47 :04 .200Z 36.4141 -96.8589 9km NNW of Pawnee, Oklahoma 8.304 3.3 ml 2016-09-03T12:58:37.800Z 36.-4233 -96 .9093 13km NW of Pawnee, Oklahoma 6.162 3.6 ml 2016-09-03T12: 16:22.200Z 36.4148 -96 .8522 9km NNW of Pawnee, Oklahoma 7.99 3.3 ml 2016-09-03T12:02:44.400Z 36.4251 -96 .9291 14km NW of Pawnee, Oklahoma 5.557 5.8 mww 2016-09-03T02:39:52.800Z 35 .6566 -97.1511 4km E of Luther, Oklahoma 5.522 3.4 ml 2016-09-03T01 :45:07 .600Z 36 .8523 -97 .6967 6km NNE of Medford, Oklahoma 6.897 3.4 ml 2016-09-01T11 :46:33.700Z 36.4395 -96.899 14km NW of Pawnee, Oklahoma 3.157 3 ml 2016-09-01 T06:25: 19.100Z 36.4848 -98.6026 26km NNW of Fairview, Oklahoma 6.563 3.2 ml 2016-09-01 T02: 19:51.020Z 37.0553 -97.5368 6km ENE of Caldwell, Kansas 5.6 3.1 ml 2016-08-31 T03: 24:22 .900Z 36.5266 -97.8801 14km N of Enid , Oklahoma 6.134 3.3 ml 2016-08-30T18:56:40.600Z 36 .6502 -97 .7088 17km S of Medford, Oklahoma 7.254 3.1 ml 2016-08-30T08:24:55.300Z 36 .9382 -97 .9103 21 km NW of Medford, Oklahoma 4.544 3 ml 2016-08-30T04: 03: 12.20oz 35.977 -97.2023 5km NE of Langston, Oklahoma 6.383 3.1 ml 2016-08-29T17:55:37.300Z 36.2152 -97.5665 26km WSW of Perry, Oklahoma 5.839 3 ml 2016-08-29T17:53:52.200Z 36.2144 -97 .5752 27km WSW of Perry, Oklahoma 6.221 3.6 ml 2016-08-27T08: 16:08 .1ooz 36.3742 -97.7229 14km E of Enid, Oklahoma 6.146 3.6 mwr 2016-08-24T10:08:56.1 00Z 36.0709 -96 .7515 6km SW of Yale, Oklahoma 3.708 3.3 ml 2016-08-20T02:32 :06 .500Z 36.5358 -98 .9594 24km ENE of Mooreland, Oklahoma 5.526 3.2 ml 2016-08-19T10:40:43.980Z 37.5673 -97.8095 7km SSW of Cheney, Kansas 1.52 3.5 mb lg 2016-08-17T13:34:28. 700Z 35.6775 -97.0794 10km E of Luther, Oklahoma 6.055 4 mwr 2016-08-17T02:39:05.800Z 36.2476 -98.4451 3km SE of Fairview, Oklahoma 6.075 3.3 mwr 2016-08-16T17:48:26.400Z 36.5139 -97.2135 20km SSE of Tonkawa, Oklahoma 6.343 3.1 ml 2016-08-16T06:08: 14.400Z 35.6569 -97.1528 3km E of Luther, Oklahoma 5.725 3.3 mwr 2016-08-15T12: 16:49.800Z 36.765 -97.6027 12km ESE of Medford, Oklahoma 7.168 3 ml 2016-08-15T11: 12: 14.900Z 36.4167 -97.3581 15km NNW of Perry, Oklahoma 7.596 3.1 ml 2016-08-14T12:22:21.900Z 36.8167 -97.6227 9km E of Medford, Oklahoma 6.603 3.5 ml 2016-08-14T03:22 :55.500Z 36.6599 -98.0868 20km NE of Helena, Oklahoma 6.637 3.1 ml 2016-08-12T09:04 :56.000Z 36.416 -97 .3574 15km NNW of Perry, Oklahoma 7.355 3.1 ml 2016-08-12T05:27: 10.400Z 36.6602 -98 .0867 20km NE of Helena, Oklahoma 6.419 3.6 mwr 2016-08-1OT16:34:53.800Z 35.6613 -97.1824 1km E of Luther, Oklahoma 5.246 3.5 ml 2016-08-1 0T11 :04:49.500Z 35 .6619 -97.1815 1km E of Luther, Oklahoma 5.429 3.6 mwr 2016-08-1 0T06: 36: 53 .300Z 36 .2138 -97.5587 25km WSW of Perry, Oklahoma 5.041 3.2 ml 2016-08-09T21 :54: 26. 100Z 36 .2137 -97 .5688 26km WSW of Perry, Oklahoma 6.444 3.2 mwr 2016-08-09T21 :46:41.400Z 36 .211 -97.57 26km WSW of Perry, Oklahoma 6.6 3.9 mwr 2016-08-09T21 :46:34.300Z 36.211 -97.575 27km WSW of Perry, Oklahoma 6.9 3.6 mb 2016-08-09T14:32 : 19.300Z 36.2842 -97.5094 19km W of Perry, Oklahoma 7.187 3.1 ml 2016-08-07T09: 13:53 .700Z 36.1772 -97.415 16km SW of Perry, Oklahoma 6.424 3 ml 2016-08-07T01 :45:44.400Z 36.4874 -98.4942 21 km WSW of Helena, Oklahoma 9.162 3.3 ml 2016-08-05T13:43: 12.10OZ 36.7108 -98.1088 22km ESE of Cherokee, Oklahoma 6.526 3.2 ml 2016-08-05T06:59:51.500Z 36 .7598 -98 .0742 25km E of Cherokee, Oklahoma 6.409 3 ml 2016-08-05TOO: 13: 07. 20oz 36.4682 -98.7508 32km NW of Fairview, Oklahoma 8.274 3.4 ml 2016-07-31T17:26:30.890Z 35.0752 -97.572 10km SE of Blanchard, Oklahoma 5.83 3.1 mb lg 2016-07-29T01 :35: 18.000Z 36 .2168 -97.5742 26km WSW of Perry, Oklahoma 4.725 3.6 mwr 2016-07-24T23:36:06 .900Z 36.4513 -98.7711 33km NW of Fairview, Oklahoma 7.745 3.1 ml 2016-07-24T08:09:07 .000Z 36.1281 -97 .0977 3km WNW of Stillwater, Oklahoma 5.922 3 ml Facility Decommissioning Plan - Rev 2 February 2021 Page 14 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 2016-07-22T22:21 :42.600Z 36.5866 -98.5431 24km SW of Cherokee, Oklahoma 7.43 3.4 ml 2016-07-22T13: 16:55.600Z 36.7926 -97.5467 16km E of Medford, Oklahoma 7.003 3.1 ml 2016-07-21T21 :33:30.900Z 36.3548 -97 .0908 19km ENE of Perry, Oklahoma 10.354 3.6 ml 2016-07-19T16: 12:30.000Z 36.2871 -97.511 20km W of Perry, Oklahoma 5.305 3.2 ml 2016-07-19T00:39:03.700Z 36.8213 -97 .6153 10km E of Medford, Oklahoma 6.924 3.4 ml 2016-07-18T18:54:34.000Z 36.0242 -97.5168 10km NE of Crescent, Oklahoma 5.732 3.2 ml 2016-07-17T08:04:46.900Z 36.2868 -97.5052 19km W of Perry, Oklahoma 5.898 3.1 ml 2016-07-17T04:22:40.700Z 36.2858 -97.5121 20km W of Perry, Oklahoma 6.244 3.5 ml 2016-07-17T04: 17:58.900Z 36.2841 -97.5138 20km W of Perry, Oklahoma 4.787 4.2 mwr 2016-07-16T16:21 :44.900Z 36.8871 -97.3216 9km NNW of Blackwell, Oklahoma 7.801 3 ml 2016-07-16T11 :47:58.800Z 35.9131 -97.3483 7km ENE of Guthrie, Oklahoma 4.872 3.1 ml 2016-07-15T00:00:01.200Z 36.3425 -97.6722 19km ESE of Enid, Oklahoma 6.149 3 ml 2016-07-14T05:52:49.900Z 35.4769 -97.3543 3km WSW of Nicoma Park, Oklahoma 6.824 3.4 ml 2016-07-13T21: 19:16.900Z 36.6758 -98.2662 11 km SE of Cherokee, Oklahoma 7.132 3.2 ml 2016-07-13T18:04:39.400Z 36.8423 -98.241 14km NE of Cherokee, Oklahoma 3.513 3 ml 2016-07-13T15:00:29.200Z 36.5402 -98.6728 29km S of Alva, Oklahoma 4.494 3 mwr 2016-07-11T20:28:57.700Z 35.9767 -97.1863 7km ENE of Langston, Oklahoma 5.816 3.1 ml 2016-07-09T23:34:32.200Z 35.8041 -97 .2429 15km S of Langston , Oklahoma 6.53 3.1 ml 2016-07-09T21 :40: 14. 700Z 36.4801 -98 .7348 32km NW of Fairview, Oklahoma 7.593 3.4 ml 2016-07-09T21 :21 :22.400Z 36.733 -98 .748 10km SW of Alva, Oklahoma 6.868 3 ml 2016-07-09T16:20:23.000Z 35.9787 -97 .2015 6km NE of Langston, Oklahoma 5 3.6 ml 2016-07-09T09:08:59 .900Z 36.708 -98 .1095 22km ESE of Cherokee, Oklahoma 6.004 3 ml 2016-07-09T07:10:38 .600Z 36.328 -97.5128 20km WNW of Perry, Oklahoma 7.417 3 ml 2016-07-09T04 :19:26 .600Z 36.4574 -98.7699 33km NW of Fairview, Oklahoma 6.526 3.3 ml 2016-07-09T02:51: 15.100Z 36.4552 -98 .767 33km NW of Fairview, Oklahoma 7.616 3.4 ml 2016-07-09T02:21 :34.1 00Z 36.4533 -98.7692 33km NW of Fairview, Oklahoma 7.913 3.1 ml 2016-07-09T02:04:27.400Z 36.4638 -98.7584 33km NW of Fairview, Oklahoma 7.242 4.4 mwr 2016-07-09T01 :01 :29.700Z 36.4766 -98.7449 33km NW of Fairview, Oklahoma 5.949 3.1 ml 2016-07-08T23:27:12 .200Z 36.4841 -98.7435 33km NW of Fairview, Oklahoma 6.701 3.1 ml 2016-07-08T22:29:38.000Z 36.4749 -98.7459 33km NW of Fairview, Oklahoma 6.356 4.2 mwr 2016-07-08T21 :31 :57 .600Z 36.4765 -98 .7387 32km NW of Fairview, Oklahoma 7.315 4.2 mwr 2016-07-08T19:06: 18.400Z 35.059 -97.6064 9km SSE of Blanchard , Oklahoma 5.875 3.4 ml LU1o-0/-0oT20:1 / :1o.100Z 37.3553 -98 .1952 16km WNW of Harper, Kansas 5 3.5 mb lg 2016-07-05T17:21 :57.400Z 36.2713 -97 .5711 25km W of Perry, Oklahoma 6.408 3.2 mwr 2016-07-05T04:58:53.600Z 35.851 -97.233 10km S of Langston, Oklahoma 6.549 3 ml 2016-07-04T21 :01 :44.100Z 35.8512 -97 .2321 10km SSE of Langston, Oklahoma 5.947 3 ml 2016-07-03T17:32: 15.800Z 36.1594 -96 .7365 6km NNW of Yale , Oklahoma 5.399 3.4 ml 2016-07-02T12: 10: 14. 700Z 36.8177 -97 .6184 10km E of Medford, Oklahoma 6.147 3.4 ml 2016-07-02T06:22:56.070Z 37.3709 -98 .0114 9km N of Harper, Kansas 6.59 3.3 mb lg 2016-07-02T05:04:53.300Z 36.8181 -97.6178 10km E of Medford, Oklahoma 6.022 3.2 ml 2016-07-01T07:26: 15.1ooz 36.2813 -97 .5159 20km W of Perry, Oklahoma 7.135 3.3 ml 2016-06-30T22:25:03. 700Z 36.4771 -98.7412 32km NW of Fairview, Oklahoma 7.694 3.5 mwr 2016-06-29T14: 15: 16.900Z 35.0083 -97 .795 13km ESE of Chickasha, Oklahoma 5.445 3 ml 2016-06-29T07:59:05.700Z 36.2842 -97.5126 20km W of Perry, Oklahoma 7.412 3.3 ml 2016-06-28T19:57:56.000Z 35.8562 -97 .2272 10km SSE of Langston, Oklahoma 5.641 3.6 mwr 2016-06-28T19:26:25.200Z 36.4736 -98.7464 31 km NW of Fairview, Oklahoma 6.961 3.2 ml 2016-06-28T03:25:08.000Z 36.7011 -98.6607 11 km S of Alva, Oklahoma 5.341 3.4 mwr 2016-06-28T02:50:10.900Z 36.5058 -99.0562 15km ENE of Mooreland, Oklahoma 5.883 3.1 ml 2016-06-26T19:48:54.800Z 36.0852 -97.6761 16km NNW of Crescent, Oklahoma 5.686 3 ml 2016-06-26T18:35:34.680Z 37.354 -98.2036 17km WNW of Harper, Kansas 5 3.4 mb lg 2016-06-25T18:03:22.440Z 37.0103 -97.558 4km ESE of Caldwell, Kansas 5.3 3.1 ml 2016-06-25T10:30:35.800Z 36.5024 -99.0565 15km ENE of Mooreland, Oklahoma 5.203 3.4 mwr 2016-06-25T04:34:53.1ooz 36.213 -97 .5668 26km WSW of Perry, Oklahoma 6.216 3.3 ml 2016-06-23T20:42:02.900Z 36.5335 -98.964 23km ENE of Mooreland, Oklahoma 6.114 3 ml 2016-06-23T11 :35:02.500Z 36.4754 -98.7434 32km NW of Fairview, Oklahoma 7.987 3 ml 2016-06-22T09:50:49.700Z 36.6763 -98 .7738 17km SW of Alva, Oklahoma 6.354 3.3 ml 2016-06-21T17:07:45.800Z 36.5073 -98.4792 19km WSW of Helena, Oklahoma 4.605 3.5 ml 2016-06-21 T01: 13:53.500Z 36.4534 -98.7719 33km NW of Fairview, Oklahoma 7.697 3.1 ml Facility Decommissioning Plan - Rev 2 February 2021 Page 15 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 2016-06-21TOO:10:30.400Z 36.4512 -98 .7708 33km NW of Fairview, Oklahoma 7.427 3.3 ml 2016-06-20T08:50:46.1 00Z 36.452 -98.7703 33km NW of Fairview, Oklahoma 7.027 3.4 mwr 2016-06-19T16:31 :54.700Z 36.8826 -97.3209 9km NNW of Blackwell, Oklahoma 7.201 3 ml 2016-06-19T01 :34:57.800Z 36.5871 -98.5399 24km SW of Cherokee, Oklahoma 6.257 3.3 ml 2016-06-18T21 :33: 15.000Z 35.5322 -97 .1115 6km NE of Harrah, Oklahoma 6.601 3.6 ml 2016-06-18T16:05:56.1 00Z 35.8028 -97.2487 15km S of Langston, Oklahoma 5.993 3.2 ml 2016-06-17T05:09: 14.900Z 35.6719 -97.4088 6km ENE of Edmond, Oklahoma 6.048 3.1 ml 2016-06-16T06: 15:04.1 ooz 36.3757 -97.7204 14km E of Enid, Oklahoma 4.825 3 ml 2016-06-15T21 :08:01.600Z 36.2186 -97.2848 7km S of Perry, Oklahoma 6.429 3.1 ml 2016-06-15T16:28:24.000Z 36.7211 -98.7324 11 km SSW of Alva, Oklahoma 6.661 3 ml 2016-06-15T15:43:53 .200Z 36.484 -99.0981 10km ENE of Mooreland, Oklahoma 5.725 3.3 ml 2016-06-15T14:36:28.400Z 36.7233 -98.7296 10km SSW of Alva, Oklahoma 6.117 3.3 ml 2016-06-15T14:30:57.500Z 36.7209 -98.7302 10km SSW of Alva, Oklahoma 6.725 3 ml 2016-06-14T06:33:30.200Z 36.6164 -98.4256 15km WNW of Helena, Oklahoma 6.115 3.1 ml 2016-06-14T02:55:29.400Z 36.2196 -97 .2844 7km S of Perry, Oklahoma 7.059 3 ml 2016-06-13T11 :52:08.600Z 36.4531 -98.7805 33km NW of Fairview, Oklahoma 5.875 3.2 ml 2016-06-12T19:44:33.500Z 35.8551 -97.2309 10km SSE of Langston, Oklahoma 5.983 3 ml 2016-06-12T10:15:25.500Z 35 .8575 -97.2246 10km SSE of Langston, Oklahoma 5.951 3.1 ml 2016-06-11 T07 :27:02.440Z 37.2038 -97.7357 22km SSW of Conway Springs, Kansas 7.75 3.2 mwr 2016-06-11 T01: 17: 18.500Z 36.4887 -98 .7261 32km NW of Fairview, Oklahoma 7.265 3.5 ml 2016-06-09T21 :58:36.300Z 36.2863 -97.5135 20km W of Perry, Oklahoma 6.897 3.6 ml 2016-06-09T11: 15:28.400Z 36.6032 -97 .6141 25km SSE of Medford, Oklahoma 6.567 3.3 ml 2016-06-09T08:02:02.1 00Z 36.4482 -98 .7801 33km NW of Fairview, Oklahoma 6.983 3.4 mwr 2016-06-08T16:50:41.700Z 36.4428 -96.8883 13km NNW of Pawnee, Oklahoma 6.632 3.9 ml 2016-06-07T16:54:37.400Z 35.6623 -97.4245 4km ENE of Edmond, Oklahoma 5.869 3.2 ml 2016-06-06T19:59:38.400Z 36.6697 -97.7414 15km S of Medford, Oklahoma 7.109 3 ml 2016-06-06T18:54:51.000Z 36.2534 -96.7622 10km SSE of Pawnee, Oklahoma 5 3.2 mwr 2016-06-06T18:52: 16.600Z 36.4268 -96.9184 14km NW of Pawnee, Oklahoma 8.602 3.3 mwr 2016-06-06T14:49:49.300Z 36.3744 -97.725 13km E of Enid, Oklahoma 6.369 3.2 ml 2016-06-06T00:35:33.100Z 35.5773 -97 .2849 1km N of Jones, Oklahoma 6.123 3.3 mwr 2016-06-05T17:08:17.840Z 37.1898 -97.9905 5km NE of Anthony, Kansas 5.15 3.4 ml 2016-06-04T04:43:27 .000Z 36.535 -98.9641 24km ENE of Mooreland, Oklahoma 6.111 3.1 ml 2016-06-04T01 :47:08.1 ooz 36.2686 -97.5731 25km W of Perry, Oklahoma o.3::s1 3.2 ml 2016-06-02T18:03:21 .300Z 36.4166 -98.1423 18km SE of Helena, Oklahoma 6.894 3.2 ml 2016-06-02T01 :28:54 .900Z 36.3756 -97.7246 13km E of Enid, Oklahoma 6.388 3.4 ml 2016-06-01T18: 13: 18.290Z 37.1913 -97 .9893 5km NE of Anthony, Kansas 4.99 3.1 ml 2016-06-01T06:20:56.500Z 36.8911 -97.3867 13km NW of Blackwell, Oklahoma 8.157 3.2 ml 2016-05-31T10:54:09.400Z 35.6541 -97.1549 3km ESE of Luther, Oklahoma 5.648 3.3 ml 2016-05-29T02:47:19.200Z 36.0815 -97 .3095 15km NNW of Langston, Oklahoma 5.871 3.5 ml 2016-05-28T04:59:30.500Z 36.1819 -96.9694 10km NE of Stillwater, Oklahoma 6.292 3 ml 2016-05-27T01 :26:34.900Z 36.4659 -98.7583 33km NW of Fairview, Oklahoma 6.916 3.2 ml 2016-05-26T01 :21 :26.500Z 35.7256 -97.1637 7km NNE of Luther, Oklahoma 5.581 3.3 ml 2016-05-25T06:09:59.500Z 36.4571 -98.7663 33km NW of Fairview, Oklahoma 7.265 3.2 ml 2016-05-23T01 :24:17.400Z 35.9781 -97 .2001 6km NE of Langston, Oklahoma 5.018 3.1 ml 2016-05-23T00:22: 57.400Z 35.9784 -97 .2001 6km NE of Langston, Oklahoma 5.168 3 ml 2016-05-22T12:00:46.000Z 36.3749 -97 .7227 14km E of Enid, Oklahoma 6.118 3.2 mwr 2016-05-21T14:46:06.1 ooz 36.5469 -97.0688 14km S of McCord, Oklahoma 5.229 3.2 ml 2016-05-20T05:41 :04.700Z 36.4821 -98 .7473 33km NW of Fairview, Oklahoma 5.783 3 ml 2016-05-20T02: 16:03.900Z 36.4731 -98.7452 32km NW of Fairview, Oklahoma 7.72 3.6 ml 2016-05-19T21 :17:08.500Z 35.8572 -97 .2254 10km SSE of Langston, Oklahoma 5.848 3.2 mwr 2016-05-19T15:55:35.400Z 35.9531 -97.3931 8km NNE of Guthrie, Oklahoma 6.297 3.1 ml 2016-05-16T21 :45:03.900Z 35.6683 -97.1532 3km E of Luther, Oklahoma 5.928 3.1 ml 2016-05-15T14:59:47.200Z 35.6655 -97.1642 2km E of Luther, Oklahoma 6.136 3.4 mwr 2016-05-15T07:23:06.800Z 36.3748 -97.7198 14km E of Enid, Oklahoma 5.848 3.6 ml 2016-05-14T22:39:30.900Z 36.5226 -98 .6957 31 km S of Alva, Oklahoma 5.923 3 ml 2016-05-14T03:39:27.500Z 35.0531 -97.5573 12km SW of Goldsby, Oklahoma 5 3.1 ml 2016-05-12T15:26:43.500Z 36.9528 -97 .9704 22km SSE of Anthony, Kansas 3.944 3 ml 2016-05-12T14:21: 16.200Z 36.2866 -97 .5146 20km W of Perry, Oklahoma 7.325 3.3 ml Facility Decommissioning Plan - Rev 2 February 2021 Page 16 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 2016-05-11T23:07:26.200Z 36.396 -97 .3243 12km NNW of Perry, Oklahoma 5 3.1 ml 2016-05-1OT17:27:16.8002 36 .2996 -96.819 4km SSW of Pawnee, Oklahoma 4.227 3.1 ml 2016-05-09T16: 10:04. 700Z 36.858 -98.1512 21 km ENE of Cherokee, Oklahoma 7.098 3 ml 2016-05-09T08:41 :54.300Z 36 .8231 -97 .7014 3km ENE of Medford, Oklahoma 5.378 3.1 ml 2016-05-09T00: 10:27.300Z 36.2679 -97 .5724 25km W of Perry, Oklahoma 5.364 3.4 ml 2016-05-08T21 : 19 :45.000Z 36.2692 -97 .5734 25km W of Perry, Oklahoma 5.969 3.3 mwr 2016-05-08T00:09:31.1 00Z 36.8167 -97 .6182 10km E of Medford, Oklahoma 6.144 3.1 mwr 2016-05-05T10:55:55.3002 36.688 -98 .2607 11 km SE of Cherokee, Oklahoma 6.007 3.5 ml 2016-05-05T01 :58:53.300Z 36.8869 -97.3185 9km NNW of Blackwell, Oklahoma 6.326 3 ml 2016-05-04T16:38:53.6002 36.4575 -98.7616 32km NW of Fairview, Oklahoma 7.494 3.2 ml 2016-05-04T12:20:25.9002 36.8731 -98.1372 23km NE of Cherokee, Oklahoma 5 3.3 ml 2016-05-03T10:35:01.6002 36.8124 -97.7986 5km W of Medford, Oklahoma 7.308 3 ml 2016-05-03T06:49:40.700Z 36.874 -98.1444 23km NE of Cherokee, Oklahoma 5.847 3.6 ml 2016-05-03T05:45:33.500Z 36 .8753 -98.1483 22km NE of Cherokee, Oklahoma 6.534 3.7 ml 2016-05-02T17:53:05.2002 35.7232 -97.1612 7km NNE of Luther, Oklahoma 6.275 3.1 ml 2016-05-02T13:44:52.9002 36.9204 -97.3528 14km NNW of Blackwell, Oklahoma 5.041 3 ml 2016-05-01T13:06: 11.500Z 36.4685 -98.7525 33km NW of Fairview, Oklahoma 8.139 3.7 ml 2016-05-01 T05:37:39.590Z 37.2093 -97.889 14km ENE of Anthony, Kansas 4.06 3.4 ml 2016-04-30T23: 16:24.4002 36.8608 -98.1514 21 km ENE of Cherokee, Oklahoma 6.464 3.2 ml 2016-04-30T19:39:28.5002 35.6625 -97.1762 1km E of Luther, Oklahoma 6.056 3 ml 2016-04-30T19:04:12.500Z 35.6613 -97.4249 4km E of Edmond, Oklahoma 6.039 3.1 ml 2016-04-30T03:34:05.600Z 35.5155 -97.3066 3km WNW of Choctaw, Oklahoma 5.943 3.2 ml 2016-04-29T22:45:03. 000Z 36 .8858 -97.3182 9km NNW of Blackwell, Oklahoma 4.647 3 ml 2016-04-29T21 :56:55.500Z 35 .7243 -97 .1692 7km NNE of Luther, Oklahoma 5 3.4 ml 2016-04-29T16:20:35.6002 35 .7304 -97.1577 8km NNE of Luther, Oklahoma 5.326 3.4 ml 2016-04-29T05:06:28.500Z 35 .5277 -96.7724 9km WNW of Prague, Oklahoma 5.2 3 ml 2016-04-29T03:48:50.300Z 36.8622 -98.0017 24km WNW of Medford, Oklahoma 4.978 3 ml 2016-04-28T02: 12:59.6002 36.2065 -97.3188 9km SSW of Perry, Oklahoma 5.071 3 ml 2016-04-27T21: 18:23.2002 35.7285 -97.159 8km NNE of Luther, Oklahoma 5.411 3 ml 2016-04-27T15:44:55.51 oz 35.7422 -97 .1777 9km N of Luther, Oklahoma 6.09 3.7 mwr 2016-04-27T11 :31 :20.900Z 35.5186 -97.0925 7km ENE of Harrah, Oklahoma 6.462 3 ml 2016-04-27T05: 19:24. 700Z 35.6612 -97.1777 1km E of Luther, Oklahoma 6.098 3 ml 2016-04-26T18:46:51.2002 35.7276 -97 .1616 7km NNE of Luther, Oklahoma 5 3.6 mwr 2016-04-26T15:44: 11 .900Z 35.5201 -97.0899 7km ENE of Harrah, Oklahoma 6.892 3.6 mwr 2016-04-26T06:25:56.500Z 36.4761 -98 .7447 33km NW of Fairview, Oklahoma 6.957 3.4 mwr 2016-04-26T06:25:44. 760Z 36.4563 * -98.6856 27km NW of Fairview, Oklahoma 5.73 3 mwr 2016-04-23T22:32:42.600Z 36 .2162 -97.5659 26km WSW of Perry, Oklahoma 4.964 3.4 ml 2016-04-23T08:36:23.500Z 35.335 -96.5376 17km NE of Seminole, Oklahoma 2.913 3 ml 2016-04-23T05:09:38.500Z 36.5208 -98.9837 21 km ENE of Mooreland, Oklahoma 4.743 3 ml 2016-04-21T18:32:42.8002 36.5316 -98.6872 30km S of Alva, Oklahoma 4.698 3.3 mwr 2016-04-21 T11 :22:38.000Z 36.4575 -96.8854 15km NNW of Pawnee, Oklahoma 1.743 3 ml 2016-04-21 T07:00:56.500Z 36.0902 -96.7369 4km SW of Yale, Oklahoma 4.573 3.3 ml 2016-04-20T14: 11 :44. 700Z 36.4593 -98.7711 33km NW of Fairview, Oklahoma 6.271 3.1 ml 2016-04-19T16:45:23.100Z 36.6492 -97 .7101 17km S of Medford, Oklahoma 7.161 3 ml 2016-04-17T09:59: 16.200Z 36.4157 -98 .1403 18km SE of Helena, Oklahoma 7.815 3.2 ml 2016-04-15T14:04:29.000Z 36.4691 -98 .841 32km E of Mooreland, Oklahoma 5.865 3.1 ml 2016-04-15T13:29:35.7002 36.4684 -98.8506 31 km E of Mooreland, Oklahoma 5.875 3 ml 2016-04-14T12: 10:05.1 00Z 36.1673 -96 .8051 11km WNW of Yale, Oklahoma 5.01 3 ml 2016-04-13T21 :33:16.600Z 36.9203 -97.3551 14km NNW of Blackwell, Oklahoma 7.476 3.5 ml 2016-04-12T17:02:51.5002 36.6229 -97.6924 20km S of Medford, Oklahoma 7.419 3.3 mwr 2016-04-12T15: 17: 17 .500Z 36.2844 -97.5187 20km W of Perry, Oklahoma 7.327 3.5 ml 2016-04-11T18:08:21.2002 36.4876 -98.5033 21 km WSW of Helena, Oklahoma 13.54 3.5 ml 2016-04-1OT16:24:57 .200Z 36.5217 -98.9795 22km ENE of Mooreland, Oklahoma 4.926 3.4 ml 2016-04-09T21 :55:44 .100Z 36.8987 -97.6768 11 km NNE of Medford, Oklahoma 5 3.4 mwr 2016-04-09T15:58:01.4002 36 .8259 -98.0141 25km W of Medford, Oklahoma 6.001 3 ml 2016-04-09T04:59:07 .200Z 35.5863 -97 .3896 7km N of Spencer, Oklahoma 6.792 3.1 ml 2016-04-08T20:30: 15.600Z 35.939 -96.762 5km S of Cushing, Oklahoma 3.41 3 ml 2016-04-08T10:49: 15.400Z 35.6612 -97.1709 2km E of Luther, Oklahoma 5.588 3.1 ml Facility Decommissioning Plan - Rev 2 February 2021 Page 17 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 2016-04-08110:00:31.200Z 35.663 -97.1606 3km E of Luther, Oklahoma 4.965 3.2 ml 2016-04-08109:37: 10.600Z 36.333 -97.1838 10km ENE of Perry, Oklahoma 6.305 3.1 ml 2016-04-08T05:20:01 .600Z 35.6631 -97 .1717 2km E of Luther, Oklahoma 5.792 3.1 ml 2016-04-07T22:27:30.400Z 35.6619 -97.1741 1km E of Luther, Oklahoma 6.106 4.2 ml 2016-04-07121 :06:25. 770Z 36.2124 -97.5716 26km WSW of Perry, Oklahoma 5 3.3 mwr 2016-04-07118:51 :26.200Z 36.4203 -98.1677 16km SSE of Helena, Oklahoma 7.284 3.1 ml 2016-04-07T08:29:32.800Z 36.4225 -98 .1706 16km SSE of Helena, Oklahoma 7.556 3.7 ml 2016-04-07T07:37:53.700Z 35.662 -97.1735 2km E of Luther, Oklahoma 5.297 3.6 ml 2016-04-07T07:36:24.300Z 35.6608 -97.1681 2km E of Luther, Oklahoma 5 3.1 ml 2016-04-07105: 58: 56 .300Z 35.6619 -97.1692 2km E of Luther, Oklahoma 5.088 3.3 ml 2016-04-06123:24:57.1ooz 36.2133 -97.5636 26km WSW of Perry, Oklahoma 6.214 3.4 mwr 2016-04-05119: 12: 14.300Z 35.9358 -96.7524 5km SSE of Cushing, Oklahoma 3.927 3 ml 2016-04-04115:24:32.900Z 36.2917 -97.0724 19km N of Stillwater, Oklahoma 5.527 3 ml 2016-04-04113:07:09.800Z 36.7285 -98.1566 18km E of Cherokee, Oklahoma 6.35 3.3 ml 2016-04-03101 :07:36.800Z 35.719 -97.1509 7km NNE of Luther, Oklahoma 5.549 3.2 ml 2016-04-03T00:59:36.1 00Z 35.7218 -97.1498 7km NNE of Luther, Oklahoma 5.589 3.3 ml 2016-04-02121 :20:01.800Z 35.6735 -97.3894 8km ENE of Edmond, Oklahoma 6.458 3.1 ml 2016-04-02121: 19:26.300Z 36.043 -97 .0097 7km NNE of Perkins, Oklahoma 6.008 3 ml 2016-03-31121 :31 :29.600Z 35.7193 -97 .1491 7km NNE of Luther, Oklahoma 5.918 3.2 mwr 2016-03-31121 :21 :23.000Z 35.7198 -97.1499 7km NNE of Luther, Oklahoma 4.117 3.2 mwr 2016-03-31121 :19:41.800Z 35.7142 -97.1527 6km NNE of Luther, Oklahoma 4.758 3 ml 2016-03-30115:57:36.800Z 36.6245 -97 .6879 20km SSE of Medford, Oklahoma 6.982 3.4 mwr 2016-03-30115:57:25.200Z 36.4684 -98 .7495 32km NW of Fairview, Oklahoma 6.687 3.2 ml 2016-03-29T22:05:49.500Z 36.4704 -98 .7501 32km NW of Fairview, Oklahoma 6.963 3.3 mwr 2016-03-29121: 12:46.080Z 36.4437 -98 .6976 27km NW of Fairview, Oklahoma 4.84 3.3 mwr 2016-03-29110: 19:44.700Z 35.9888 -97 .5725 4km NNE of Crescent, Oklahoma 5.556 3.6 mwr 2016-03-29T04:53:01 .200Z 35.99 -97 .5773 4km NNE of Crescent, Oklahoma 5.183 4.2 mwr 2016-03-27T23:28:22.800Z 36.6241 -97.6878 20km SSE of Medford, Oklahoma 6.854 3.2 ml 2016-03-27107: 19:53.800Z 36.9252 -97.3467 14km NNW of Blackwell, Oklahoma 6.962 3 ml 2016-03-27T06:09:23.900Z 36.5987 -97 .8359 22km N of Enid , Oklahoma 7.264 3.3 ml 2016-03-27106:01 :47.000Z 36.5995 -97 .8331 22km N of Enid, Oklahoma 7.205 3.3 mwr 2016-03-26116:07:26.700Z 36.8787 -98 .0113 26km WNW of Medford, Oklahoma 5 3 ml 2016-03-25T14.55.36 .900Z 35.7241 -97.165 7km NNE of Luther, Oklahoma 5.527 J ml 2016-03-24112:47:04.200Z 36.5194 -98 .9787 22km ENE of Mooreland, Oklahoma 4.639 3 ml 2016-03-23111 :45: 16.400Z 36.8672 -98 .341 12km N of Cherokee, Oklahoma 5.672 3.1 ml 2016-03-21 T23: 35: 30 .400Z 36.9006 -98.2661 18km NNE of Cherokee, Oklahoma 5 3 ml 2016-03-21122:41 :17.200Z 36.3705 -98.4457 11km NNE of Fairview, Oklahoma 7.396 3.1 ml 2016-03-20120:54:01 .100Z 36.2891 -97.5215 20km W of Perry, Oklahoma 7.619 3.2 ml 2016-03-20T08:29:55.300Z 36.4737 -98.5257 23km N of Fairview, Oklahoma 6.371 3.1 ml 2016-03-20107: 14:54. 700Z 36.1902 -96.7806 11 km NW of Yale, Oklahoma 6.776 3.3 ml 2016-03-19122: 59: 04. 400Z 35.9941 -97.1193 8km WNW of Perkins, Oklahoma 5.128 3.4 ml 2016-03-19121 :34:39.220Z 37.0948 -98.0283 6km S of Anthony, Kansas 6.27 3 ml 2016-03-19T20:28:54.300Z 36.6993 -98.6192 12km SSE of Alva, Oklahoma 7.195 3.2 ml 2016-03-18119:57:01 .300Z 35.4911 -96.9746 6km WSW of Meeker, Oklahoma 5.354 3 ml 2016-03-17T04:00:42.300Z 36.8279 -98.2815 10km NE of Cherokee, Oklahoma 5.663 3.1 ml 2016-03-17103:34: 18.200Z 36.8257 -98.2825 10km NE of Cherokee, Oklahoma 5.458 3.6 ml 2016-03-16123:01 :08.300Z 36.8337 -98.2972 10km NNE of Cherokee, Oklahoma 5.23 3 ml 2016-03-16T16:02:17.300Z 36.9164 -97.9872 25km WNW of Medford, Oklahoma 5.253 3.3 ml 2016-03-16105:31 :27.800Z 36.8392 -98.2791 11 km NE of Cherokee, Oklahoma 5.454 3.2 ml 2016-03-15110:12:45.600Z 36.6629 -97.2568 5km ESE of Tonkawa, Oklahoma 4.054 3.1 ml 2016-03-15103: 09: 04.300Z 35.8207 -96.8144 14km NNE of Chandler, Oklahoma 5.967 3.3 ml 2016-03-14110: 17:22.400Z 36.8389 -98.2762 11 km NE of Cherokee, Oklahoma 6.485 3.3 ml 2016-03-14101 :32:37.000Z 36.4685 -98.7485 32km NW of Fairview, Oklahoma 7.502 3.2 mwr 2016-03-13103:43:4 7.400Z 36.6048 -97.7723 22km S of Medford, Oklahoma 7.35 3.4 ml 2016-03-12101 :55:02.200Z 36.373 -97 .7223 14km E of Enid, Oklahoma 6.621 3.4 ml 2016-03-11113:03:38.000Z 35.7874 -96.9892 13km NW of Chandler, Oklahoma 6.275 3.1 ml 2016-03-11T07:32:11.400Z 35.9822 -96.8066 3km W of Cushing, Oklahoma 5.307 3.2 ml 2016-03-1OT23:47:24.600Z 36 .284 -97.641 23km E of Waukomis, Oklahoma 6.087 3.2 ml Facility Decommissioning Plan - Rev 2 February 2021 Page 18 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 2016-03-1 0T23:42:19.4902 36.287 -97.6458 22km E of Waukomis, Oklahoma 4.36 3.1 mb lg 2016-03-1OT18:13:13.7002 36.6753 -98.1644 17km NNE of Helena, Oklahoma 5.62 3 ml 2016-03-1OT13:56:34 .5002 36.5132 -98.7147 32km S of Alva, Oklahoma 5.36 3.1 ml 2016-03-1OT12:24:35.2002 36.2776 -97.5113 20km W of Perry, Oklahoma 6.58 3.1 ml 2016-03-1 0T08:16:44.1502 36.5179 -97 .7399 18km NE of Enid, Oklahoma 3.19 3 mb lg 2016-03-09T07:08:01 .3002 35.5404 -97.3094 3km SW of Jones, Oklahoma 6.253 3 ml 2016-03-09T03:45:48.2002 36.2793 -97 .513 20km W of Perry, Oklahoma 6.816 3.3 ml 2016-03-08T22:22:57.1002 35.6022 -97.123 9km SE of Luther, Oklahoma 5.588 3 ml 2016-03-08T09:28:42.0002 35.9192 -97.3388 8km ENE of Guthrie, Oklahoma 6.219 3.7 ml 2016-03-07T00:43:36.4002 36.471 -98.748 32km NW of Fairview, Oklahoma 5.997 3.6 mwr 2016-03-05T22:21 :32.4002 35.8629 -97.2123 9km SSE of Langston, Oklahoma 5 3 ml 2016-03-03T21 :49:35.4002 36.6381 -98.1437 15km NE of Helena , Oklahoma 6.049 3.1 ml 2016-03-03T18:09: 18.2002 36.2168 -97.291 8km S of Perry, Oklahoma 8.022 3 ml 2016-03-03T05:42:35.2002 36.4612 -98.7611 33km NW of Fairview, Oklahoma 7.598 3.9 ml 2016-03-03T05:16: 14.7002 36.6688 -97.7403 15km S of Medford , Oklahoma 6.429 3 ml 2016-03-02T23:31:48.1002 36.4751 -98 .742 32km NW of Fairview, Oklahoma 7.222 3.9 mwr 2016-03-02T08:22:51. 7002 36.47 -98.758 33km NW of Fairview, Oklahoma 6.95 3 ml 2016-03-02T06:54:40.5002 36.4626 -98.7591 33km NW of Fairview, Oklahoma 7.336 3.7 mwr 2016-03-02T06:05:30.6002 36.6685 -97.7419 15km S of Medford, Oklahoma 6.648 3.1 ml 2016-03-01T23:08:56.1002 35.7199 -97.1683 6km NNE of Luther, Oklahoma 5.351 3.4 ml 2016-02-29T09:53:54. 7002 36.5254 -98.9867 21 km ENE of Mooreland, Oklahoma 6.91 3.3 ml 2016-02-29T09:35:05.3002 36.5283 -98 .9828 22km ENE of Mooreland , Oklahoma 7.331 3.6 ml 2016-02-29T01 :58:31.9002 35.6636 -97 .3938 7km E of Edmond, Oklahoma 6.904 3 ml 2016-02-28T04:27:54.0002 36.4282 -97 .7232 14km ENE of Enid, Oklahoma 6.441 3 ml 2016-02-27T21 :34:40.5002 36.6671 -97 .7431 15km S of Medford, Oklahoma 7.151 3 ml 2016-02-27T21:02:38.1002 36.4736 -98.7528 33km NW of Fairview, Oklahoma 7.213 3.5 ml 2016-02-27T21 :02: 12.2002 36.4711 -98 .748 32km NW of Fairview, Oklahoma 7.281 3.3 ml 2016-02-27T05:07: 16.4002 36.2875 -97.5202 20km W of Perry, Oklahoma 6.914 3.5 mwr 2016-02-27T05:05:49.3002 36.287 -97.5192 20km W of Perry, Oklahoma 6.114 3.8 mwr 2016-02-26T10:30:49.4002 36.1337 -98.8066 17km NE of Taloga, Oklahoma 6.937 3.4 ml 2016-02-26T09:52 :44.6002 35.6698 -97.4138 6km ENE of Edmond, Oklahoma 6.839 3.3 ml 2016-02-25T20:45:15.7002 36.5297 -98.9767 22km ENE of Mooreland, Oklahoma 6.627 3.1 ml 2016-02-25T11 :39:03.6002 35.8763 -97 .3093 9km SSW of Langston, Oklahoma 7.862 3.6 rnwr 2016-02-25T09:55:31 .3002 35.7745 -97.4862 12km SSW of Guthrie, Oklahoma 7.177 3 ml 2016-02-24T11:29:47.1002 35.6718 -97.4179 5km ENE of Edmond, Oklahoma 6.396 3.4 ml 2016-02-23T16: 17:09.2002 35.6651 -97.3943 7km E of Edmond, Oklahoma 6.837 3 ml 2016-02-23T14: 16: 19.1002 35.6716 -97 .393 7km ENE of Edmond , Oklahoma 7.199 3.2 ml 2016-02-23T09:37:38.2002 35.6655 -97.4037 6km ENE of Edmond, Oklahoma 6.649 3 ml 2016-02-23T08:51 :58.9002 35.6617 -97.3941 7km E of Edmond , Oklahoma 6.261 3 ml 2016-02-23T08:44:33.5002 35.6645 -97.4049 6km E of Edmond, Oklahoma 6.57 3.7 mwr 2016-02-23T02:35: 15.5002 35.6654 -97.4023 7km ENE of Edmond, Oklahoma 7.466 3.6 ml 2016-02-23T02:06:55.8002 35.6633 -97 .3977 7km E of Edmond, Oklahoma 7.048 3 ml 2016-02-23T00:48:45. 7002 35.6669 -97.3994 7km ENE of Edmond, Oklahoma 6.42 3.2 ml 2016-02-22T16: 17:49.9002 36.3366 -96.9858 16km W of Pawnee, Oklahoma 3.747 3 ml 2016-02-22T15: 17:38.4002 36.4546 -98.7768 33km NW of Fairview, Oklahoma 7.888 3.4 mwr 2016-02-22T06:56:51.5002 35.9058 -97.4169 3km NNE of Guthrie, Oklahoma 5.984 3.1 ml 2016-02-21T05:11 :14.6002 36.406 -97 .543 26km WNW of Perry, Oklahoma 4.078 3 ml 2016-02-21 T02:02:05.9002 35.7193 -97.1696 6km NNE of Luther, Oklahoma 5.495 3.2 ml 2016-02-20T15: 16: 10.5002 36.259 -97.3568 7km WSW of Perry, Oklahoma 6.789 3 ml 2016-02-19T21 :16:48.2002 36.4775 -98.7433 33km NW of Fairview, Oklahoma 7.168 3.4 ml 2016-02-19T13:18:32.9002 36.5322 -98.6839 30km S of Alva, Oklahoma 5 3.1 ml 2016-02-19T11 :33:58.7002 35.6644 -97.401 7km E of Edmond, Oklahoma 6.852 3.2 ml 2016-02-19T08:04:39.7002 36.529 -98.6849 30km S of Alva, Oklahoma 5 3.5 ml 2016-02-18T14:33:01.0002 35.721 -97.1672 7km NNE of Luther, Oklahoma 6.503 3.5 ml 2016-02-17T18:59:42.1002 35.6626 -97.3902 8km E of Edmond, Oklahoma 6.802 3 ml 2016-02-17T18:15:02.5002 35.7232 -97.1624 7km NNE of Luther, Oklahoma 5.777 3.4 ml 2016-02-17T08:32:16.0002 36.4648 -98.7566 33km NW of Fairview, Oklahoma 2.273 3.1 ml 2016-02-17T08:31 :39.9002 36.4585 -98.7703 33km NW of Fairview, Oklahoma 7.308 3 ml Facility Decommissioning Plan - Rev 2 February 2021 Page 19 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 2016-02-17T08: 16:49.4002 35.7218 -97.1626 7km NNE of Luther, Oklahoma 5.83 3.3 ml 2016-02-17T01: 19:05.3002 36.4745 -98.7617 34km NW of Fairview, Oklahoma 7.594 3.1 ml 2016-02-16T23:04:38.2002 36.4562 -98.7489 31 km NW of Fairview, Oklahoma 1.101 3.3 ml 2016-02-16T04:20:07.0002 35.7209 -97.1648 7km NNE of Luther, Oklahoma 5.399 3.1 ml 2016-02-15T21:44:32.1002 36.2619 -97.3526 6km WSW of Perry, Oklahoma 7.6 3.3 ml 2016-02-15T19:27:31.9002 36.4704 -98.7628 33km NW of Fairview, Oklahoma 7.355 3.2 ml 2016-02-15T03:45:00.2002 36.4549 -98.7642 32km NW of Fairview, Oklahoma 7.263 3.2 ml 2016-02-15T01 :52:25.2002 36.4799 -98.7307 32km NW of Fairview, Oklahoma 4.653 3.2 ml 2016-02-14T22:42:58.6002 36.472 -98.7511 33km NW of Fairview, Oklahoma 10.137 3.4 ml 2016-02-14T11 :25:50.6002 36.2831 -97.7101 16km E of Waukomis, Oklahoma 4.975 3.5 mwr 2016-02-14T10:41 :54.0002 36.4663 -98.75 32km NW of Fairview, Oklahoma 4.316 3.1 ml 2016-02-14T04: 13:32.7002 36.5082 -98.7089 33km S of Alva, Oklahoma 7.593 3.8 ml 2016-02-14T01 :11 :17.3002 36.4673 -98.7589 33km NW of Fairview, Oklahoma 7.598 3.2 ml 2016-02-14T00:32: 16.0002 36.455 -98.7638 32km NW of Fairview, Oklahoma 5.781 3.7 ml 2016-02-13T21 :59:03.7002 36.466 -98.7563 33km NW of Fairview, Oklahoma 7.089 3 ml 2016-02-13T20:58:44.9002 36.0624 -97.4841 15km NE of Crescent, Oklahoma 5.324 3.2 ml 2016-02-13T20:55:32.1002 36.5244 -98.7027 31 km S of Alva, Oklahoma 7.763 3.3 ml 2016-02-13T20:18:05.0002 36.4648 -98.7596 33km NW of Fairview, Oklahoma 7.56 3 ml 2016-02-13T18:21 :20.2002 36.5188 -98.7021 31 km S of Alva, Oklahoma 3.889 3.7 ml 2016-02-13T17:44: 18.4002 36.5013 -98.718 33km NW of Fairview, Oklahoma 7.714 3.4 ml 2016-02-13T17:25:52.5002 36.8766 -97.789 9km NNW of Medford, Oklahoma 2.55 3.1 ml 2016-02-13T17: 17:39.1002 36.4812 -98.7392 33km NW of Fairview, Oklahoma 5 4 ml 2016-02-13T17:07:06.2902 36.4898 -98.709 31 km NW of Fairview, Oklahoma 8.31 5.1 mww 2016-02-11T19:49: 13.4002 36.4791 -98.7459 33km NW of Fairview, Oklahoma 7.118 3.1 ml 2016-02-11T18:32:58.8002 36.4787 -98.7524 33km NW of Fairview, Oklahoma 9.702 3.2 ml 2016-02-11T13: 18:24.4002 36.5113 -99.0049 19km ENE of Mooreland, Oklahoma 3.596 3 ml 2016-02-1 0T20:57:35.5402 37.0563 -97.8933 16km SE of Anthony, Kansas 7.12 3.1 ml 2016-02-09T15:38:58.4002 36.2597 -96.748 10km SSE of Pawnee, Oklahoma 5.1 3.4 ml 2016-02-08T08:02: 12.5002 35.54 -97 .3102 3km SW of Jones, Oklahoma 6.319 3.5 ml 2016-02-07T16:10:00.7002 35.9748 -97.1792 7km ENE of Langston, Oklahoma 7.801 3.6 ml 2016-02-06T21:59:54.1002 35.9734 -97.1795 7km ENE of Langston, Oklahoma 7.034 3.7 ml 2016-02-06T20:39:09.0002 36.8274 -97.7746 4km WNW of Medford, Oklahoma 5.834 3.4 mwr 2016-02-06T09: 19: 18.1 00Z 35.9737 -97. 1766 7km ENE of Langston, Oklahoma 6.962 3 :1 ml 2016-02-06T09: 13:47.6002 35.9745 -97.1806 7km ENE of Langston, Oklahoma 7.74 3.1 ml 2016-02-05T16:09:30.2002 36.5709 -97.8167 20km NNE of Enid, Oklahoma 6.884 3.5 ml 2016-02-05T16:06:24.0002 36.57 -97.814 20km NNE of Enid, Oklahoma 5.37 3.1 ml 2016-02-05T13:21 :43.6002 36.1753 -97 .2566 12km SSE of Perry, Oklahoma 7.369 3.1 ml 2016-02-05T11 :38:50.0002 36.3214 -97.5533 24km W of Perry, Oklahoma 5.668 3.1 ml 2016-02-04T20:27:39. 7002 35.9502 -97.3859 8km NNE of Guthrie, Oklahoma 6.315 3.3 ml 2016-02-03T23: 11 :28.0002 36.8143 -97.622 9km E of Medford, Oklahoma 5.686 3.5 ml 2016-02-03T07:00:42 .9002 35.9553 -97.3684 9km NNE of Guthrie, Oklahoma 5.732 3.2 ml 2016-02-02T13:32:25.5002 36.477 -98 .7416 32km NW of Fairview, Oklahoma 7.46 3.4 ml 2016-02-02T02:29:57 .6002 36.4777 -98.7442 33km NW of Fairview, Oklahoma 7.137 3.6 ml 2016-02-01 T09:45:23.6002 36.1242 -97.0618 1km NNW of Stillwater, Oklahoma 6.929 3 ml 2016-01-31 T08:56:46.4002 36.3879 -96.7162 9km NE of Pawnee, Oklahoma 6.967 3.5 ml 2016-01-30T22: 16:42.0002 36.4861 -98.7349 33km NW of Fairview, Oklahoma 7.497 3 ml 2016-01-30T19:20: 10.6002 35.4149 -96.5568 10km SW of Boley, Oklahoma 4.565 3.1 ml 2016-01-29T21 :58:07.6002 36.4831 -98.7478 33km NW of Fairview, Oklahoma 7.811 3.6 ml 2016-01-29T20:45:22.1002 36.4781 -98.7424 33km NW of Fairview, Oklahoma 2.924 3.2 ml 2016-01-29T20:27:47. 7002 36.4748 -98.7515 33km NW of Fairview, Oklahoma 7.989 3.4 ml 2016-01-29T17:47:12 .0002 36.4857 -98.7403 33km NW of Fairview, Oklahoma 8.215 3.4 ml 2016-01-28T16:33:07.4002 36.5004 -97.0742 20km S of McCord, Oklahoma 7.222 3.5 mwr 2016-01-28T15:07:45.4002 35.6915 -97.4648 4km NNE of Edmond, Oklahoma 5.888 3.1 ml 2016-01-28T00:50:33.3002 36.758 -98.0688 25km E of Cherokee, Oklahoma 6.455 3.2 ml 2016-01-26T06:24:49. 7002 36.9178 -97.9822 25km WNW of Medford, Oklahoma 5 3.2 mwr 2016-01-25T10:05:43.3002 35.8809 -97.337 7km E of Guthrie, Oklahoma 5 3 ml 2016-01-25T04:56:09.6002 35.8812 -97.3329 8km E of Guthrie, Oklahoma 4.872 3.4 ml 2016-01-24T22:52:58.4002 36.6625 -98.4647 14km SW of Cherokee, Oklahoma 11.241 3.3 ml Facility Decommissioning Plan - Rev 2 February 2021 Page 20 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 Maq. Tvoe 1 2016-01-24T18: 19:40.800Z 36.9408 -97 .8536 18km NW of Medford, Oklahoma 4.995 3 ml 2016-01-24T16:21 :56.600Z 36.482 -98 .7411 33km NW of Fairview, Oklahoma 5.901 3 ml 2016-01-24T10:01 :40.800Z 36.9319 -97 .6479 11 km SSW of Caldwell, Kansas 3.778 3.5 mwr 2016-01-24T06: 16:20.000Z 36.4499 -98 .3717 14km SW of Helena, Oklahoma 6.284 3 ml 2016-01-23T03:40:26.800Z 36.4971 -98 .7318 33km NW of Fairview, Oklahoma 7.742 3.1 ml 2016-01-22T12:41 :24.000Z 36.8675 -97 .9927 24km WNW of Medford, Oklahoma 5.599 3.1 ml 2016-01-22T11 :45:55.900Z 36.76 -98.0517 27km E of Cherokee, Oklahoma 5.895 3.2 ml 2016-01-22T10:59:08. 700Z 36.6028 -97 .8279 23km N of Enid, Oklahoma 6.85 3.7 ml 2016-01-22T08:45:04.800Z 36.4832 -98.7273 32km NW of Fairview, Oklahoma 5.027 3 ml 2016-01-22T08:22:03. 900Z 36.8342 -97 .9888 22km W of Medford, Oklahoma 6.495 3 ml 2016-01-22T06:05:01.600Z 35.8962 -97.2489 5km S of Langston, Oklahoma 5.91 3.1 ml 2016-01-22T05: 17:09.1 00Z 36.5248 -98 .6902 31 km S of Alva, Oklahoma 1.443 3.2 ml 2016-01-22T01: 15:42.500Z 35.671 -97.4167 5km ENE of Edmond, Oklahoma 6.302 3.2 ml 2016-01-21 T21 :05:04.600Z 36 .8347 -97.9844 22km W of Medford, Oklahoma 6.777 3 ml 2016-01-21T12:55:58.300Z 36.7924 -97 .882 13km W of Medford , Oklahoma 5.594 3 ml 2016-01-21 T08:27:58.400Z 36.5133 -98.6987 32km S of Alva, Oklahoma 5.692 3 ml 2016-01-20T08:55:58.000Z 35.7465 -97.3563 15km NE of Edmond, Oklahoma 5.936 3.6 ml 2016-01-20T04:41 :57.400Z 36.4563 -97 .7326 14km ENE of Enid, Oklahoma 7.766 3 ml 2016-01-19T23:57 :07 .300Z 36.827 -97 .7697 3km NW of Medford, Oklahoma 4.45 3.3 ml 2016-01-19T20:45:57.700Z 36.507 -98.7135 33km S of Alva, Oklahoma 7.478 3.8 mwr 2016-01-19T19:41 :57.200Z 36.5007 -98.7137 33km NW of Fairview, Oklahoma 6.357 3 ml 2016-01-18T16:41 :56.300Z 35.9526 -97.3894 8km NNE of Guthrie, Oklahoma 6.882 3 ml 2016-01-18T12:55:56.900Z 36.2761 -98.4096 6km E of Fairview, Oklahoma 8.309 4.1 ml 2016-01-18T01 :13:32.000Z 35.6719 -97.4155 6km ENE of Edmond, Oklahoma 6.381 3.2 ml 2016-01-17T08:51 :55.600Z 36.0751 -97.2038 13km WSW of Stillwater, Oklahoma 7.869 3.3 ml 2016-01-17T00:59:31.200Z 36.8662 -97.9984 24km WNW of Medford, Oklahoma 4.99 3.5 ml 2016-01-16T22:37:51 .200Z 36.7743 -97.8667 12km WSW of Medford, Oklahoma 5.92 3.1 ml 2016-01-16T00:36:51.200Z 36.4482 -98.3695 14km SW of Helena, Oklahoma 5.949 3 ml 2016-01-15T09:31 :51.400Z 36 .5851 -98.1352 12km ENE of Helena, Oklahoma 6.464 3 ml 2016-01-15T08:04:27.1 00Z 35.9593 -96.9113 11 km E of Perkins, Oklahoma 4.088 3.6 ml 2016-01-15T03:29:24.300Z 36.9498 -97.8217 17km NNW of Medford, Oklahoma 5.729 3.1 ml 2016-01-15T02:06:30.400Z 36.9509 -97 .8102 17km NNW of Medford, Oklahoma 5 3.3 ml 2016-01-14T23:15:31 .900Z 36.838 -8(.19/2 1!:>km NNW of Medford, Oklahoma 2.351 3.5 mwr 2016-01-14T22:41 :39.100Z 36 .7675 -97 .7725 5km SW of Medford, Oklahoma 6.003 3.4 ml 2016-01-14T12:55:03.200Z 36.4803 -98 .7542 34km NW of Fairview, Oklahoma 7.304 3.2 ml 2016-01-14T04:45:53.500Z 36.4813 -98 .7485 33km NW of Fairview, Oklahoma 9.489 3.1 ml 2016-01-13T18:22:31 .100Z 36.9535 -97.8334 18km NNW of Medford, Oklahoma 5.034 3 ml 2016-01-13T15:44:07.900Z 36.9368 -97.71 14km SW of Caldwell, Kansas 3.074 3.2 ml 2016-01-13T03:44:19.200Z 35.9516 -97.3918 8km NNE of Guthrie, Oklahoma 7.632 3.1 ml 2016-01-13T03: 14:21.900Z 35.6646 -97.3928 7km E of Edmond, Oklahoma 6.593 3 ml 2016-01-11T15:18:06 .200Z 36.5072 -98.7076 33km S of Alva, Oklahoma 6.609 3.4 ml 2016-01-11T14:16:12.200Z 36.4728 -98.756 33km NW of Fairview, Oklahoma 8.148 3.2 ml 2016-01-11T13:12:16.700Z 36.4723 -98.7575 33km NW of Fairview, Oklahoma 7.331 3 ml 2016-01-11T09:04:05.900Z 36.478 -98.7316 32km NW of Fairview, Oklahoma 5 3 ml 2016-01-11T04:17:32.800Z 36.4797 -98.7369 32km NW of Fairview, Oklahoma 5 3 ml 2016-01-11T02:01 :54.1 ooz 36.4755 -98.7625 34km NW of Fairview, Oklahoma 8.363 3.4 mwr 2016-01-1OT15: 12:01.900Z 36.6065 -98.1003 16km ENE of Helena, Oklahoma 7.389 3.1 ml 2016-01-09T16:50:05.800Z 36.5164 -98.6953 32km S of Alva, Oklahoma 6.05 3 ml 2016-01-08T18:43: 14.600Z 35.6632 -97 .3914 7km E of Edmond, Oklahoma 6.675 3.5 ml 2016-01-08T17:50:04.1 00Z 36.5072 -98 .7123 33km S of Alva, Oklahoma 7.828 3.5 ml 2016-01-08T17:08:42.800Z 36.711 -98.4298 8km SW of Cherokee, Oklahoma 3.629 3.1 ml 2016-01-08T16:57:48.800Z 36.5866 -98.4054 12km WNW of Helena, Oklahoma 7.407 3.1 ml 2016-01-08T16:46:49.200Z 36.4905 -98.7306 33km NW of Fairview, Oklahoma 7.465 3 ml 2016-01-08T14:01 :56.1 O0Z 36 .5095 -98.7148 33km S of Alva, Oklahoma 7.532 3.9 ml 2016-01-08T13:36:29.000Z 36.5137 -98 .7184 32km S of Alva, Oklahoma 10.447 3.8 mwr 2016-01-08T09:54:40.900Z 36.7305 -98.0145 26km WSW of Medford, Oklahoma 6.145 3.1 ml 2016-01-08T05:49:44. 700Z 36.3087 -96.6483 14km ESE of Pawnee, Oklahoma 6.768 3 ml 2016-01-08T05:37:45.1 0OZ 36.7064 -97.6317 14km SE of Medford, Oklahoma 5.33 3.5 ml Facility Decommissioning Plan - Rev 2 February 2021 Page 21 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 2016-01-08T01 :53:30.8002 36.4919 -98 .7296 33km NW of Fairview, Oklahoma 7.703 3 ml 2016-01-08TO0: 10:03.6002 36.4968 -98 .7259 33km NW of Fairview, Oklahoma 7.717 3 ml 2016-01-07T19:59:44.5002 36.5024 -98 .7108 33km S of Alva, Oklahoma 5 3.7 mwr 2016-01-07T18:34:35.1002 36.4707 -98 .7527 33km NW of Fairview, Oklahoma 9.378 3.4 ml 2016-01-07T18:00:26.3002 36.4698 -98 .7479 32km NW of Fairview, Oklahoma 5.696 3.4 ml 2016-01-07T13:40:59.2002 36.4819 -98 .7491 33km NW of Fairview, Oklahoma 9.828 3.7 ml 2016-01-07T10:48:41. 7002 36.4805 -98 .7499 33km NW of Fairview, Oklahoma 7.891 3.8 ml 2016-01-07T10: 12:52.3002 36.4747 -98.7422 32km NW of Fairview, Oklahoma 6.175 3.2 ml 2016-01-07T08:37: 11 .1002 36.4754 -98 .7342 32km NW of Fairview, Oklahoma 6.647 4.4 mwr 2016-01-07T08:06: 15.1002 36.4755 -98.7549 33km NW of Fairview, Oklahoma 8.698 3.9 ml 2016~01-07T08:02:30.9002 36.5014 -98 .723 33km NW of Fairview, Oklahoma 8.714 3.4 ml 2016-01-07T06:42:57.6002 35.6574 -97.406 6km E of Edmond , Oklahoma 6.829 3 ml 2016-01-07T06:38:33.8002 36.4843 -98.7372 33km NW of Fairview, Oklahoma 5.168 3.6 ml 2016-01-07T06:03:28.9002 36.5226 -98.6992 31 km S of Alva, Oklahoma 8.102 3.3 ml 2016-01-07T05:37:48.5002 36.4815 -98.7475 33km NW of Fairview, Oklahoma 7.603 3.1 ml 2016-01-07T05:19:47.5002 36.4843 -98.7382 33km NW of Fairview, Oklahoma 6.664 3.5 ml 2016-01-07T04:49:47.1002 36.4794 -98.7423 33km NW of Fairview, Oklahoma 8.284 3.6 ml 2016-01-07T04 :27:57.6002 36.4955 -98.7254 33km NW of Fairview, Oklahoma 4.058 4.7 mww 2016-01-07T04 :27:27.9002 36.486 -98 .7412 33km NW of Fairview, Oklahoma 7.093 4.4 mwr 2016-01-07T03:07: 10.2002 36.4901 -98.7294 33km NW of Fairview, Oklahoma 4.317 3.2 ml 2016-01-07T02:15:07.7002 35.6689 -97.4037 6km ENE of Edmond , Oklahoma 6.229 3.5 ml 2016-01-06T15:26: 12.2002 36.4892 -98.7304 33km NW of Fairview, Oklahoma 7.195 3.9 ml 2016-01-06T12:51: 12.2002 35.6618 -97.4121 6km E of Edmond, Oklahoma 5.076 3.2 ml 2016-01-06T10:40:29. 7002 36.7302 -98.0189 26km WSW of Medford, Oklahoma 6.336 3.2 ml 2016-01-06T06:51 :39.2002 35.6621 -97.3902 8km E of Edmond, Oklahoma 5.336 3.2 ml 2016-01-06T06: 19:25.3002 36.4885 -98 .7319 33km NW of Fairview, Oklahoma 9.409 4 ml 2016-01-06T01: 17:05.4002 35.6596 -97.3904 7km E of Edmond, Oklahoma 6.35 3 ml 2016-01-04T12:43:02.5002 36.0733 -97.201 13km WSW of Stillwater, Oklahoma 9.143 3.4 ml 2016-01-04T12:23:24.5002 36.0734 -97 .2023 13km WSW of Stillwater, Oklahoma 11.517 3.5 ml 2016-01-04T10:20:59.1002 36.0727 -97 .2042 13km WSW of Stillwater, Oklahoma 10.367 3.4 ml 2016-01-04T09:45:04.1002 36.0706 -97 .2026 13km WSW of Stillwater, Oklahoma 11 .605 3.3 ml 2016-01-03T21 :38:49.2002 36.0695 -97 .214 14km WSW of Stillwater, Oklahoma 4.965 3.3 ml 2016-01-03T20:56:29.000L 30.0702 -9/.2006 14km WSW of Stillwater, Oklahoma 9.838 3. *I ml 2016-01-02T21 :04:34.5002 36.2754 -97.4586 15km W of Perry, Oklahoma 6.582 3.3 ml 2016-01-02T20:26:40.4002 35.7431 -97.3569 14km NE of Edmond , Oklahoma 6.662 3.3 mwr 2016-01-02T13:46:06.5002 36.277 -97.4544 15km W of Perry, Oklahoma 6.501 3.1 ml 2016-01-02T05:08: 11 .5002 36.8214 -97.7101 2km NE of Medford , Oklahoma 5.561 3 ml 2016-01-02T00:02 :38.1002 36.4865 -98.7376 33km NW of Fairview, Oklahoma 7.779 3 ml 2016-01-01 T23: 15:58 .8502 35.9688 -97.4016 10km NNE of Guthrie, Oklahoma 5 3.2 mb lg 2016-01-01 T22:40 :26.6002 35.9533 -97 .3969 8km NNE of Guthrie, Oklahoma 6.886 3.1 ml 2016-01-01 T22:08 :04.7002 35.6661 -97 .3992 7km ENE of Edmond, Oklahoma 6.696 3 ml 2016-01-01 T20:28:07.6002 35.8209 -97.4362 6km S of Guthrie, Oklahoma 5.632 3.4 ml 2016-01-01 T11 :39:39.8002 35.6688 -97.4065 6km ENE of Edmond, Oklahoma 5.825 4 .2 mwr 2016-01-01T11 :25:04.5002 36.8042 -97.8514 10km W of Medford, Oklahoma 5.454 3 ml 2015-12-31T11 :35:26.4002 36.6123 -98 .8055 24km SSW of Alva, Oklahoma 6.285 3.2 ml 2015-12-31T03:26:38.5002 36.8328 -97.7676 4km NW of Medford, Oklahoma 5.41 3 ml 2015-12-30T18:13:45.4002 35.6648 -97.4018 7km E of Edmond, Oklahoma 7.184 3 ml 2015-12-30T11 :22:48.5002 35.9428 -97.2997 4km W of Langston, Oklahoma 7.69 3.2 ml 2015-12-30T07:32:48.6002 35.6656 -97.399 7km ENE of Edmond, Oklahoma 5.994 3.1 ml 2015-12-30T06:00:10.7002 36.5904 -98.3799 10km WNW of Helena, Oklahoma 5.458 3.3 ml 2015-12-30T03:45:08.2002 36.729 -98 .0094 26km WSW of Medford, Oklahoma 6.625 3.7 ml 2015-12-29T22:17:47.9002 35.9424 -97.2991 3km W of Langston, Oklahoma 6.66 3.3 ml 2015-12-29T21 :40:47.0002 35.6702 -97.4075 6km ENE of Edmond, Oklahoma 6.254 3.3 ml 2015-12-29T20:27:25.5002 35.6632 -97 .3978 7km E of Edmond, Oklahoma 6.286 3 ml 2015-12-29T20:24:42.8002 36.5036 -98.8963 28km ENE of Mooreland, Oklahoma 15.73 3 mb lg 2015-12-29T18:47:08.7002 35.6636 -97.4002 7km E of Edmond, Oklahoma 6.717 3.3 ml 2015-12-29T18:00:32.3002 35.6664 -97.4052 6km ENE of Edmond , Oklahoma 6.531 3 ml 2015-12-29T12:48: 14.1002 36.4455 -98 .7997 34km NW of Fairview, Oklahoma 4.985 3.1 ml Facility Decommissioning Plan - Rev 2 February 2021 Page 22 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 2015-12-29T11 :51 :02.600Z 35.6713 -97.413 6km ENE of Edmond, Oklahoma 5.967 3.3 ml 2015-12-29T11 :49:23.900Z 35.6694 -97.411 6km ENE of Edmond, Oklahoma 6.128 3.5 ml 2015-12-29T11 :39: 19.200Z 35.6654 -97.4054 6km ENE of Edmond, Oklahoma 6.532 4.3 mwr 2015-12-29T03:22 :35.300Z 36.8343 -98.281 11 km NE of Cherokee, Oklahoma 4.669 3 ml 2015-12-28T16:21 :32 .500Z 36.2902 -97.1243 14km E of Perry, Oklahoma 4.167 3.2 ml 2015-12-28T15:52:56.600Z 36.2629 -97.3543 6km WSW of Perry, Oklahoma 7.669 3.4 ml 2015-12-28T09:02:20.400Z 36.458 -98.7686 33km NW of Fairview, Oklahoma 7.239 3 ml 2015-12-28T03:59 :30 .600Z 35.6693 -97.4048 6km ENE of Edmond, Oklahoma 5 3.7 ml 2015-12-28T00:36:30.000Z 35.586 -97.3737 7km N of Spencer, Oklahoma 6.08 3.4 ml 2015-12-27T13:18:58.800Z 36.834 -97.7922 6km WNW of Medford, Oklahoma 5 3.5 ml 2015-12-26T19:41: 17 .800Z 35.5891 -97.3829 7km N of Spencer, Oklahoma 6.099 3.2 ml 2015-12-26T19:40: 15.700Z 35.5894 -97.3805 7km N of Spencer, Oklahoma 6.07 3 ml 2015-12-26T05:35 :05.700Z 36.0603 -97.5525 12km NNE of Crescent, Oklahoma 5.868 3 ml 2015-12-25T19:12:25.400Z 36.7287 -98.0118 26km WSW of Medford, Oklahoma 6.212 3.6 mwr 2015-12-25T13:45:26.600Z 36.7313 -98.0116 26km WSW of Medford, Oklahoma 5.127 3.1 ml 2015-12-24T22:21 :41 .900Z 35.8223 -97.4228 6km S of Guthrie, Oklahoma 2.803 3 ml 2015-12-24T15: 14:55.100Z 35.8186 -97.425 6km S of Guthrie, Oklahoma 5.855 3.4 ml 2015-12-24T15: 13:34.600Z 35.8186 -97.4268 6km S of Guthrie, Oklahoma 6.359 3.2 ml 2015-12-24T04:40:37.500Z 36.4861 -98 .5029 21 km WSW of Helena, Oklahoma 3.854 3.3 ml 2015-12-24T04:10:47.900Z 36.7598 -98.0725 25km E of Cherokee, Oklahoma 6.521 3.3 ml 2015-12-23T07:35:11.200Z 36.7123 -97 .5674 18km SE of Medford, Oklahoma 6.33 3 ml 2015-12-23T03:04:00.300Z 36.9488 -97.8446 18km NNW of Medford, Oklahoma 3.315 3.3 ml 2015-12-23T00:45:32.1 00Z 36.7599 -98.0722 25km E of Cherokee, Oklahoma 6.433 3.3 ml 2015-12-22T19:15:53.900Z 36.7577 -98.0696 25km E of Cherokee, Oklahoma 6.443 3 ml 2015-12-22T16:39:09.500Z 35.7432 -97 .3532 15km NE of Edmond, Oklahoma 5.58 3.5 ml 2015-12-21 T02:32:57.400Z 36.4869 -98.7262 32km NW of Fairview, Oklahoma 5 3 ml 2015-12-20T16: 18:58.600Z 36.5387 -97.1875 18km SE of Tonkawa, Oklahoma 6.424 3 ml 2015-12-19T01 :37: 15.100Z 36.7012 -97.986 25km WSW of Medford, Oklahoma 6.822 3.3 ml 2015-12-18T18:45:00.900Z 35.8944 -96.7415 10km SSE of Cushing, Oklahoma 4.904 3.2 ml 2015-12-18T08:06:07.1 00Z 36.1196 -97 .636 18km NNW of Crescent, Oklahoma 5 3.3 ml 2015-12-18T04:09:24.300Z 36.4971 -98.7304 33km NW of Fairview, Oklahoma 6.519 3.6 ml 2015-12-18T02:35:04.100Z 36.2926 -97 .5186 20km W of Perry, Oklahoma 6.634 3.4 ml 2015-12-18T02:03:25.1 00Z 35.9869 -96.799 2km W of Cushing, Oklahoma 5.563 3.7 ml 2015-12-17T15:56:06.300Z 36.2121 -97 .5533 25km WSW of Perry, Oklahoma 5.952 3.4 ml 2015-12-17T05:56: 11.400Z 35.9916 -97.2294 5km NNE of Langston, Oklahoma 5.588 3.1 ml 2015-12-16T09:20:34.700Z 35.6173 -97.0863 11 km ESE of Luther, Oklahoma 5.801 3.4 ml 2015-12-15T22:56:07.900Z 36.2125 -97.5543 25km WSW of Perry, Oklahoma 6.153 3.2 ml 2015-12-15T20:42:07.600Z 36.5302 -98.5909 28km W of Helena , Oklahoma 4.64 3.2 ml 2015-12-15T16:49: 11.400Z 36.7654 -98.0543 27km E of Cherokee, Oklahoma 6.29 3.3 ml 2015-12-15T09:57:48.800Z 36.2129 -97.554 25km WSW of Perry, Oklahoma 6.119 3.2 ml 2015-12-15T01 :07:48.900Z 36.7462 -98 .127 20km E of Cherokee, Oklahoma 6.32 3.1 ml 2015-12-14T06:54:41 .500Z 36.2836 -97.5096 19km W of Perry, Oklahoma 6.583 3.2 ml 2015-12-13T21 :00:07.500Z 36.2803 -97.5159 20km W of Perry, Oklahoma 7.584 3 ml 2015-12-13T15:24: 14.500Z 36.8675 -98.0032 24km WNW of Medford, Oklahoma 5.778 3 ml 2015-12-12T17:40:40.900Z 36.4466 -97.1198 23km NE of Perry, Oklahoma 6.667 3.4 ml 2015-12-12T12:39:57.900Z 36.28 -97.4563 15km W of Perry, Oklahoma 8.016 3.1 ml 2015-12-1 0T23:21 :45.300Z 36.2624 -97.357 6km WSW of Perry, Oklahoma 7.99 3.3 ml 2015-12-09T23:12:01.400Z 36.6037 -98.3492 9km NW of Helena, Oklahoma 3.966 3.3 ml 2015-12-09T02:14:05.600Z 36.7615 -97.6104 12km ESE of Medford, Oklahoma 6.409 3 ml 2015-12-08T02:04:39.400Z 36.9531 -97.8029 17km NNW of Medford, Oklahoma 3.856 3.5 ml 2015-12-08T00:30:30.300Z 36.9466 -97 .8224 17km NNW of Medford, Oklahoma 4.862 3.4 ml 2015-12-08T00:29:49.800Z 36.9432 -97.8095 16km NNW of Medford, Oklahoma 3.83 3 ml 2015-12-08T00:25:42.500Z 36.9373 -97.8253 16km NNW of Medford, Oklahoma 8.096 3.4 ml 2015-12-08T00:08:30.600Z 36.9451 -97 .815 16km NNW of Medford, Oklahoma 3.913 3.5 mwr 2015-12-06T18:29:50.700Z 36.7599 -98 .0659 25km E of Cherokee, Oklahoma 6.637 3.5 ml 2015-12-06T18:25:37.300Z 35.8485 -96.6504 11 km N of Stroud , Oklahoma 4.625 3.1 ml 2015-12-06T03:04:36.700Z 36.466 -98.7523 32km NW of Fairview, Oklahoma 4.099 3.1 ml 2015-12-06T01 :01 :41 .900Z 36.4703 -98.7606 33km NW of Fairview, Oklahoma 6.126 4 mwr Facility Decommissioning Plan - Rev 2 February 2021 Page 23 of 56

Preparer: D. Horne; Date: 02/15/21 Table 2 Revision 2 Reviewer: E. Dul le; 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. Tvoe 1 2015-12-05T21 :44:36.000Z 36.2 -97.4277 16km SW of Perry, Oklahoma 6.122 3.4 ml 2015-12-05T01 :14:18.900Z 34.8037 -97.8063 13km E of Rush Springs, Oklahoma 10.507 3.1 ml 2015-12-04T22:17:57.800Z 36.6136 -98.0533 20km ENE of Helena, Oklahoma 5.975 3.2 ml 2015-12-04T15:17:53.300Z 36.7635 -98 .055 26km E of Cherokee, Oklahoma 6.234 3.1 ml 2015-12-04T05:08:12 .900Z 36.8315 -98.2737 11 km NE of Cherokee, Oklahoma 4.986 3.2 mwr 2015-12-04T00:27:40.500Z 36.7605 -98.0523 27km E of Cherokee, Oklahoma 6.714 3.6 ml 2015-12-02T19:40:30.000Z 36.8265 -98.2839 10km NE of Cherokee, Oklahoma 5.307 3.4 ml 2015-12-02T06: 19:59.?00Z 36.7586 -98.0656 26km E of Cherokee, Oklahoma 6.77 3.1 ml 2015-12-01T17:36:39.1 ooz 36.7353 -98.7485 10km SW of Alva, Oklahoma 3.18 3 ml 2015-12-01T17:34:35.300Z 36.5074 -98 .7109 33km S of Alva, Oklahoma 1.255 3.1 ml 2015-12-01T00:46:31.900Z 36.6562 -98.4644 14km SW of Cherokee, Oklahoma 7.922 3.2 ml 2015-11-30T21 :28:44.400Z 36.9443 -97.8309 17km NNW of Medford, Oklahoma 5.264 3.3 mwr 2015-11-30T19:4 7: 11.400Z 36.3457 -99 .2157 10km S of Mooreland, Oklahoma 2.981 3.3 ml 2015-11-30T13:00:55.300Z 36.2814 -97.5075 19km W of Perry, Oklahoma 11.418 3.2 ml 2015-11-30T11 :50: 15.000Z 35.6679 -97 .3949 7km ENE of Edmond , Oklahoma 5.448 3.2 ml 2015-11-30T09:49:12.800Z 36.7509 -98.0561 26km E of Cherokee, Oklahoma 5.629 4.7 mwr 2015-11-29T10:17:42.400Z 36.5082 -99.029 17km ENE of Mooreland, Oklahoma 6.333 3 ml 2015-11-26T09:08:44.000Z 36.9559 -97 .8262 18km NNW of Medford, Oklahoma 6.286 3.2 ml 2015-11-26T09:04:55.700Z 36.382 -98.2791 18km S of Helena, Oklahoma 2.752 3 ml 2015-11-26T05: 14:50.500Z 36.3304 -97.7317 15km ESE of Enid, Oklahoma 5.466 3 ml 2015-11-26T05:06:37.200Z 36.3316 -97.7259 15km ESE of Enid, Oklahoma 5.438 3.1 ml 2015-11-26T00:56:02.500Z 36.9459 -97.8108 16km NNW of Medford , Oklahoma 4.784 3.1 mwr 2015-11-26T00:32:48.800Z 36.9465 -97.8139 17km NNW of Medford , Oklahoma 5.439 3.3 ml 2015-11-25T17:57:45.800Z 35.8638 -96.8725 16km SW of Cushing, Oklahoma 5.213 3 ml 2015-11-25T14:02:02.300Z 36.9448 -97 .8125 16km NNW of Medford, Oklahoma 4.103 3.3 ml 2015-11-25T00:43:50.800Z 36.8393 -98 .2691 12km NE of Cherokee, Oklahoma 4.864 4.1 mb 2015-11-24T02:47:40.600Z 36.8152 -98.2767 9km NE of Cherokee, Oklahoma 5.942 3 ml 2015-11-24T01 :13:55.200Z 36.8134 -98.2758 9km NE of Cherokee, Oklahoma 6.835 3.1 ml 2015-11-24T00:54:18.200Z 36.8179 -98 .2846 9km NE of Cherokee, Oklahoma 5.517 3.3 mwr 2015-11-23T21 :36:18.400Z 36.8326 -98 .2905 10km NE of Cherokee, Oklahoma 4.266 3.8 ml 2015-11-23T21 :17:46.500Z 36.8382 -98 .2762 11 km NE of Cherokee, Oklahoma 5.028 4.4 mwr 2015-11-23T18:31 :01.000Z 36.6528 -98.4777 15km SW of Cherokee, Oklahoma 7.427 3.2 ml 2015-11-22T08:12:32.1 00Z 36.6596 -98.4593 13km SW of Cherokee, Oklahoma 6.981 3 ml 2015-11-21T14:04:13.600Z 36.945 -97 .819 17km NNW of Medford, Oklahoma 4.068 3 ml 2015-11-20T23:09:28.400Z 36.6619 -98.4609 13km SW of Cherokee, Oklahoma 7.995 3.4 ml 2015-11-20T22:55:51.200Z 36.9413 -97.8259 17km NNW of Medford, Oklahoma 3.555 3.5 mwr 2015-11-20T22 :53:47.900Z 36.9456 -97.8471 18km NNW of Medford, Oklahoma 4.878 3.5 ml 2015-11-20T22:40:40.300Z 36.9483 -97.8276 17km NNW of Medford, Oklahoma 5 4.1 mwr 2015-11-20T21 :11 :13.800Z 36.7607 -98.0745 25km E of Cherokee, Oklahoma 6.697 3.4 ml 2015-11-20T15:42:32.400Z 36.5143 -98 .6089 29km NNW of Fairview, Oklahoma 5 3.3 ml 2015-11 -20T12:07:45.300Z 36.6547 -98.4654 14km SW of Cherokee, Oklahoma 5.727 3 ml 2015-11-20T11 :22:05.1 00Z 36.6534 -98.4733 15km SW of Cherokee, Oklahoma 7.096 3.5 ml 2015-11-20T08:06:01 .900Z 36.5129 -98 .6097 29km NNW of Fairview, Oklahoma 4.934 3.4 ml 2015-11-20T06:12:49.900Z 36.6535 -98.4719 15km SW of Cherokee, Oklahoma 6.69 3.7 ml 2015-11-19T14:24 :58.800Z 36.0788 -97 .5686 14km N of Crescent, Oklahoma 4.488 3.7 mwr 2015-11-19T13:25:10.600Z 36.071 -97.5836 13km N of Crescent, Oklahoma 4.87 3.2 ml 2015-11-19T12:03:10.000Z 36.6563 -98.4682 14km SW of Cherokee, Oklahoma 7.009 3.3 mwr 2015-11-19T09:46:22.000Z 36.6561 -98.4614 14km SW of Cherokee, Oklahoma 10.294 3.2 ml 2015-11-19T07:42:12.000Z 36.6602 -98.4594 13km SW of Cherokee, Oklahoma 5.914 4.7 mwr 2015-11-19T03:34:05.500Z 36.2833 -97.7102 16km E of Waukomis, Oklahoma 5.834 3 ml 2015-11-18T12:08:40.000Z 36.1212 -97.6437 19km NNW of Crescent, Oklahoma 4.858 3.4 mwr 2015-11-18T03:22:41 .900Z 36.7759 -97.7622 4km SW of Medford, Oklahoma 6.033 3.2 ml 2015-11-17T16:50:49.800Z 36.3686 -97.1309 16km ENE of Perry, Oklahoma 3.339 3.1 ml 2015-11-15T09:45:31.300Z 36.4696 -98.7549 33km NW of Fairview, Oklahoma 5.109 4.3 mwr 2015-11-14T16:40:46.400Z 36.1991 -97.4882 20km WSW of Perry, Oklahoma 6.399 3.1 ml 2015-11-13T20:47:22 .500Z 36.6941 -98.2615 10km SE of Cherokee, Oklahoma 6.218 3.1 ml 2015-11-13T01 :51: 16.800Z 36.9516 -97.8307 18km NNW of Medford, Oklahoma 2.703 3.4 ml 2015-11-12T10:48:13.200Z 36.9661 -97.8492 20km NNW of Medford, Oklahoma 5.457 3 ml Facility Decommissioning Plan - Rev 2 February 2021 Page 24 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 2015-11-12T09:24:27 .2002 35.9197 -97.3397 8km ENE of Guthrie, Oklahoma 5.495 3 ml 2015-11-11T14:54:55.9002 35.674 -97 .3996 7km ENE of Edmond, Oklahoma 5.986 3.4 ml 2015-11-11T10:38:16.9002 36.6949 -98.2619 10km SE of Cherokee, Oklahoma 6.004 3.4 ml 2015-11-11 T01:46:50.1002 36.9482 -97.8084 17km NNW of Medford, Oklahoma 1.118 3 ml 2015-11-11 T01 :39:03.6002 36.9471 -97.8262 17km NNW of Medford, Oklahoma 2.143 3.5 mwr 2015-11-1 0T23:12:45.9002 36.6716 -97.7326 15km S of Medford, Oklahoma 5.015 3.1 ml 2015-11-1OT19: 16:01 .5002 36.9447 -97.8257 17km NNW of Medford, Oklahoma 5 3 ml 2015-11-1OT19: 13:38.2002 36.9435 -97 .8231 17km NNW of Medford, Oklahoma 3.434 3.5 ml 2015-11-10T14:02:18.4002 36.9507 -97 .8335 18km NNW of Medford, Oklahoma 0.113 3.7 ml 2015-11-1OT13:36:45.6002 35.9825 -96.8077 3km W of Cushing, Oklahoma 4.339 3.3 mwr 2015-11-1OT13:11 :29.3002 36.4721 -98 .7516 33km NW of Fairview, Oklahoma 2.091 3.2 ml 2015-11-1 0T08:23:55.8002 36.7543 -98.0791 24km E of Cherokee, Oklahoma 6.1 3.5 ml 2015-11-10T01 :37:50.5002 36 .3193 -97 .5538 24km W of Perry, Oklahoma 6.25 3.5 ml 2015-11-09T22:42:06.6002 37.1223 -97 .6172 10km N of Caldwell, Kansas 4.27 3.6 mwr 2015-11-09T10:18:09.9002 36 .7605 -98 .0766 25km E of Cherokee, Oklahoma 6.516 3.7 ml 2015-11-09T06: 17:42.6002 36.8489 -97.6892 6km NE of Medford, Oklahoma 5 3 ml 2015-11-08T19:59:06.0002 35.9803 -96 .8185 4km W of Cushing, Oklahoma 4.192 3.5 ml 2015-11-08T08:29:00.0002 36.9466 -97.836 17km NNW of Medford , Oklahoma 2.954 3.4 ml 2015-11-08T04:04:21 .8002 36.9506 -97.8375 18km NNW of Medford, Oklahoma 3.666 3.5 ml 2015-11-07T23:43:27.9002 36.9439 -97.8401 17km NNW of Medford, Oklahoma 4.734 3.6 ml 2015-11-07T22: 13: 18. 7002 36.9498 -97.8386 18km NNW of Medford, Oklahoma 3.207 3.5 ml 2015-11-07T21 :07:31.0002 36.6241 -97.7214 20km S of Medford , Oklahoma 4.963 3.4 ml 2015-11-07T20: 10:55.8002 36.9412 -97.8353 17km NNW of Medford, Oklahoma 2.149 3 ml 2015-11-07T19:27:33.1002 36.6554 -98 .7167 17km SSW of Alva, Oklahoma 3.159 3 ml 2015-11-07T19:20:09.3002 36.9439 -97 .843 18km NNW of Medford, Oklahoma 5 3.1 ml 2015-11-07T18:40:58.0002 36.9482 -97.8369 18km NNW of Medford, Oklahoma 5 3.1 ml 2015-11-07T18:29: 13.4002 36.9468 -97 .8368 18km NNW of Medford, Oklahoma 3.905 3.8 mwr 2015-11-07T11 :31: 18.5002 36.9499 -97 .8361 18km NNW of Medford, Oklahoma 4.856 3 ml 2015-11-07T11 :11 :53.9002 36.9528 -97.8552 19km NNW of Medford, Oklahoma 5 4.1 mwr 2015-11-07T05:30:10.1002 36.4238 -97 .3357 15km NNW of Perry, Oklahoma 5 3 ml 2015-11-07T04:50:08.5002 36.2639 -97 .2395 5km ESE of Perry, Oklahoma 3.81 3.5 mb lg 2015-11-04T16:38:48 .8002 36.9444 -97.8404 17km NNW of Medford, Oklahoma 2.642 3.2 ml 2015-11-04T15:16:39.2002 36 .9436 -97.8458 *18km NNW of Medford, Oklahoma 2.888 3.2 ml 2015-11-04T02:48:06.4002 36 .2977 -97 .1748 10km E of Perry, Oklahoma 9.759 3 ml 2015-11-03T17:55:08.6002 36 .3207 -97 .5524 23km W of Perry, Oklahoma 3.917 3.1 ml 2015-11-03T16:32:03.5002 35 .9135 -97 .2423 3km SSE of Langston, Oklahoma 6.601 3.3 ml 2015-11-03T16:22:47.6002 36.7665 -98 .0791 24km E of Cherokee, Oklahoma 5.864 3.2 ml 2015-11-02T17:44:14.5002 35.9199 -97 .3269 7km WSW of Langston, Oklahoma 5 3 ml 2015-11-02T17:35:39.4002 35.9181 -97.3303 7km WSW of Langston, Oklahoma 7.158 3.7 ml 2015-11-02T16:57:36.7002 35.9198 -97.3312 7km WSW of Langston, Oklahoma 5.373 3.9 mwr 2015-10-31T06:14:04.9002 35.9872 -96 .7981 2km W of Cushing, Oklahoma 4.66 3.5 ml 2015-10-30T21 :37:58.6002 36.7355 -98 .752 10km SW of Alva, Oklahoma 4.242 3.3 ml 2015-10-30T20:20:20.3002 36.0739 -97.5736 13km N of Crescent, Oklahoma 4.673 3.6 mwr 2015-10-30T16:52:43 .6002 36.7804 -98 .652 3km SSE of Alva, Oklahoma 1.61 3.1 ml 2015-10-30T11 :37:06.3002 35.8561 -97.3552 6km ESE of Guthrie, Oklahoma 5.828 3.2 ml 2015-10-30T04:37:02.2202 37.1523 -97.6225 13km N of Caldwell, Kansas 4.62 3.4 mwr 2015-10-29T05:43:35.1002 36.4256 -97 .3401 15km NNW of Perry, Oklahoma 1.102 3 ml 2015-10-29T05:26:56.5002 36.134 -97.3028 17km S of Perry, Oklahoma 1.936 3.3 ml 2015-10-29T01:20:47.1002 35.8619 -97.3546 6km ESE of Guthrie, Oklahoma 3.84 3.5 ml 2015-10-28T11 :59:54.0002 36.7023 -97 .6965 12km SSE of Medford, Oklahoma 0.106 3.1 ml 2015-10-27T21 :03:56.0002 36.6553 -98.7187 17km SSW of Alva, Oklahoma 3.516 3.3 ml 2015-10-27T15:44:41 .2002 36.1762 -97.3871 15km SW of Perry, Oklahoma 4.798 3.1 ml 2015-10-27T10:48:59.7002 36.2139 -97 .5708 26km WSW of Perry, Oklahoma 5 3 ml 2015-10-27T09:13:35.1002 36.8285 -97 .7887 5km WNW of Medford, Oklahoma 2.531 3.4 ml 2015-10-27T03:06:49.3802 37.1217 -97.6213 10km N of Caldwell, Kansas 4.02 3.6 ml 2015-10-27T02:21 :47.5002 37.122 -97.6177 10km N of Caldwell, Kansas 3.87 3.3 ml 2015-10-26T06:34:00. 9002 36.3662 -97.7008 16km ESE of Enid, Oklahoma 5 3.4 ml 2015-10-25T05:05: 14.1002 36.1857 -98.811 21 km NE of Taloga, Oklahoma 7.132 3 ml Facility Decommissioning Plan - Rev 2 February 2021 Page 25 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 2015-10-24122:08:09.000Z 36.8302 -97 .7883 5km WNW of Medford, Oklahoma 5.446 3.5 ml 2015-10-24121 :13:07.800Z 36.8304 -97 .7932 5km WNW of Medford, Oklahoma 5.308 3.2 ml 2015-10-24116:27:02.430Z 37.2292 -97 .9598 8km SE of Harper, Kansas 2.72 3 ml 2015-10-24T05:57:56.500Z 36.7833 -97.5441 17km E of Medford, Oklahoma 5.562 3.2 ml 2015-10-22101 :33:33.200Z 36.9385 -98.0212 23km S of Anthony, Kansas 5.904 3.1 ml 2015-10-19115:42:09.500Z 36.8989 -97.6529 12km NE of Medford, Oklahoma 5 3.2 ml 2015-10-19105:22:51 .000Z 36.761 -98.0721 25km E of Cherokee, Oklahoma 4.089 3.2 ml 2015-10-19T04:55:29.400Z 36.7346 -97.8401 12km SW of Medford, Oklahoma 5.648 3.1 mwr 2015-10-19T00:08:50 .650Z 37.1192 -97.6185 9km N of Caldwell, Kansas 3.79 3 ml 2015-10-18T05:07:34.200Z 35.8532 -97.3492 7km ESE of Guthrie, Oklahoma 5.582 3.1 ml 2015-10-18T03:12:51.700Z 35.853 -97.35 7km ESE of Guthrie, Oklahoma 5.8 3.3 ml 2015-10-17T13:20:00.640Z 37.0575 -97.934 13km SE of Anthony, Kansas 5.82 3.4 mwr 2015-10-17112:12:49.970Z 37.0537 -97 .9413 13km SE of Anthony, Kansas 6.21 3.4 mwr 2015-10-17110: 15: 13.000Z 35.9768 -96.8208 4km W of Cushing, Oklahoma 4.29 3 ml 2015-10-15111 :28:02 .500Z 36.7589 -98 .0695 25km E of Cherokee, Oklahoma 6.489 3 ml 2015-10-15107:32:19.1ooz 36.1819 -97 .367 13km SSW of Perry, Oklahoma 6.512 3.1 ml 2015-10-15106:50:03.1O0Z 35.8566 -97 .3464 7km ESE of Guthrie, Oklahoma 4.847 3.5 ml 2015-10-14l23:56:26.100Z 36.3469 -96 .7753 2km ENE of Pawnee, Oklahoma 5 3 ml 2015-10-14l22:27:20.300Z 36.0745 -97.5824 13km N of Crescent, Oklahoma 4.494 3.4 ml 2015-10-14102: 18:36.300Z 35.9978 -96.7698 1km N of Cushing, Oklahoma 0.445 3.1 ml 2015-10-13118:51 :06.000Z 36.2783 -97 .5121 20km W of Perry, Oklahoma 8.378 3.2 ml 2015-10-12l22:52:06.300Z 36.5742 -97 .0936 12km SSW of McCord, Oklahoma 7.696 3.4 ml 2015-10-12117: 11 :35.300Z 36.5688 -97.0992 13km SSW of McCord, Oklahoma 4.868 3 ml 2015-10-12114:11 :16.000Z 36.329 -96.7763 2km ESE of Pawnee, Oklahoma 5.697 3 ml 2015-10-12110:22:58.480Z 37.2128 -97.9815 7km NNE of Anthony, Kansas 4.35 3 ml 2015-10-12l09:33:48.900Z 36.2842 -97.504 19km W of Perry, Oklahoma 5 3.2 ml 2015-10-12l08:29:27.600Z 36.7611 -98.0692 25km E of Cherokee, Oklahoma 6.378 3.3 ml 2015-10-11T23:46:15.750Z 37.0568 -97.9338 13km SE of Anthony, Kansas 5.95 3 ml 2015-10-11T10:27: 13.700Z 36.3205 -97 .5574 24km W of Perry, Oklahoma 7.824 3.5 mwr 2015-10-11T08:49:51 .300Z 36.5908 -98.3872 11 km WNW of Helena , Oklahoma 5 3.3 ml 2015-10-1 0l23:43:22 .800Z 35.9781 -96 .8184 4km W of Cushing , Oklahoma 4.689 3.3 ml 2015-10-1 0l22:20:55.400Z 35.9897 -96.7828 1km WNW of Cushing, Oklahoma 4.474 3 ml 2015-10-1 0l22:07:05.400Z 35.9862 -96 .7981 2km W of Cushing, Oklahoma 4.694 3.1 ml 2015-10-1 0l22:03:05.300Z 35.986 -96.8032 3km W of Cushing, Oklahoma 3.274 4.3 mwr 2015-10-10115:20:48.300Z 36.7234 -97 .9299 19km WSW of Medford , Oklahoma 5.716 3.5 mwr 2015-10-10109:20:43. 000Z 36.7187 -97.9311 20km WSW of Medford, Oklahoma 5.629 4.4 mwr 2015-10-10103:08:10.00oz 36.3573 -97 .3745 10km NW of Perry, Oklahoma 7.955 3.1 ml 2015-10-10101 :25:49.380Z 37.2142 -97 .9802 8km NNE of Anthony, Kansas 4.45 3.3 ml 2015-10-10101 :23:32.480Z 37.2123 -97 .9803 7km NE of Anthony, Kansas 4.16 3 ml 2015-10-10100:20:20.000Z 36.8414 -97 .8147 8km WNW of Medford, Oklahoma 5.819 3.4 ml 2015-10-09121 :57:50 .700Z 36.4906 -98 .7225 32km NW of Fairview, Oklahoma 2.342 3.4 ml 2015-10-09l09:13:52 .900Z 35.9355 -96.7741 5km S of Cushing, Oklahoma 3.565 3.1 ml 2015-10-08102:45:30.1 00Z 35.9923 -96.791 2km WNW of Cushing, Oklahoma 5 3 ml 2015-10-07l22:38:59.400Z 36.3656 -97.4514 16km WNW of Perry, Oklahoma 7.571 3 ml 2015-10-07111 :48:35.700Z 36.1182 -97 .3038 19km S of Perry, Oklahoma 5.982 3 ml 2015-10-06120:39:00. 700Z 36.9365 -98 .0359 24km S of Anthony, Kansas 4.974 3 ml 2015-10-06112:05:06.500Z 36.2667 -97.3407 5km WSW of Perry, Oklahoma 4.499 3.4 ml 2015-10-05l06:53:01 .800Z 36.7769 -98.1898 15km E of Cherokee, Oklahoma 6.033 3.8 ml 2015-10-05l06:52:50.400Z 36.7669 -98.1799 15km E of Cherokee, Oklahoma 6.282 3.4 ml 2015-10-04119:53:56.800Z 36.6364 -98.1943 12km NE of Helena, Oklahoma 6.095 3 ml 2015-10-03105:11 :58.340Z 37.1015 -97 .7032 11 km NW of Caldwell, Kansas 5.67 3.4 ml 2015-10-02112:57: 19.1 00Z 35.7996 -96.6805 6km NNW of Stroud, Oklahoma 4.475 3.2 ml 2015-10-02106:25:39. 700Z 36.3409 -97.0494 22km ENE of Perry, Oklahoma 2.956 3.1 ml 2015-10-02l05:58:52.800Z 36.6274 -98.2138 10km NNE of Helena, Oklahoma 6.41 3.5 mwr 2015-10-01107:47:33.000Z 36.2541 -97.2343 6km SE of Perry, Oklahoma 7.993 3.2 ml 2015-10-01 l05:56:35.500Z 36.252 -97.2268 6km SE of Perry, Oklahoma 5.983 3.7 mwr 2015-09-30108:28: 17 .300Z 36.7149 -98.4457 9km WSW of Cherokee, Oklahoma 4.911 3.3 ml 2015-09-29123: 17:28.800Z 36.6273 -98 .2122 10km NNE of Helena, Oklahoma 6.147 3.3 ml Facility Decommissioning Plan - Rev 2 February 2021 Page 26 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 2015-09-29T12:40:00. 700Z 36.6276 -98.2139 10km NNE of Helena, Oklahoma 6.186 3.1 ml 2015-09-28T12:58:31.700Z 36.8411 -98.2448 13km NE of Cherokee, Oklahoma 4.467 3 ml 2015-09-27T21 :59:43.650Z 35.9894 -96.8061 3km W of Cushing, Oklahoma 2.67 3.2 mb lg 2015-09-27T21 :59:43.31 OZ 35.9856 -96.797 2km W of Cushing, Oklahoma 5.1 3.6 ml 2015-09-27T13:42:47.200Z 36.9031 -97.9099 18km NW of Medford, Oklahoma 3.903 3 ml 2015-09-25T22:30:31.200Z 36.2657 -98.5337 4km W of Fairview, Oklahoma 7.105 3.2 ml 2015-09-25T06:02:58.000Z 36.5267 -98.4576 16km W of Helena, Oklahoma 0.799 3.4 ml 2015-09-25T01 :59:03.600Z 35 .9932 -96.7899 2km WNW of Cushing, Oklahoma 0.488 3.1 mwr 2015-09-25T01 :16:37.700Z 35.987 -96.7872 1km W of Cushing, Oklahoma 2.893 4 mwr 2015-09-24T08:29:25.600Z 36.7396 -98.3618 1km SSW of Cherokee, Oklahoma 7.733 3.2 ml 2015-09-23T04:05:24.700Z 35.5944 -97.4025 8km NNW of Spencer, Oklahoma 5.571 3.1 ml 2015-09-22T12:29:21 .800Z 36.2878 -97.5076 19km W of Perry, Oklahoma 4.629 3 ml 2015-09-22T09:22: 11.430Z 36.8302 -98.2355 13km NE of Cherokee, Oklahoma 5 3.3 mb lg 2015-09-22T06:33:53.000Z 36.2911 -98.1903 22km NNE of Okeene, Oklahoma 4.924 3.3 mwr 2015-09-21T19:50:27.600Z 36.2662 -98.5315 4km W of Fairview, Oklahoma 6.167 3.8 ml 2015-09-21T02:48:31.700Z 36.269 -98.5169 3km W of Fairview, Oklahoma 0.78 3.1 ml 2015-09-20T21 :39:56.100Z 35.901 -97.2545 4km S of Langston, Oklahoma 5 3.1 ml 2015-09-20T13:06:22 .500Z 35.9836 -96 .8064 3km W of Cushing, Oklahoma 4.789 3.2 ml 2015-09-20T11 : 17:52.620Z 37 .0495 -97 .915 15km SE of Anthony, Kansas 5.85 3 ml 2015-09-19T05:20:03.000Z 35 .9878 -96.7963 2km W of Cushing , Oklahoma 4.478 3.1 ml 2015-09-19T05: 16:26.600Z 35 .9861 -96.7964 2km W of Cushing , Oklahoma 4.573 3 ml 2015-09-19T04:20: 12. 700Z 36.3331 -96.791 1km ESE of Pawnee, Oklahoma 5 3.1 ml 2015-09-18T23:51 :56.31 OZ 36.8125 -97.8086 6km W of Medford, Oklahoma 3.11 3.1 mb lg 2015-09-18T13:10:02.780Z 36.2769 -97.5182 20km W of Perry, Oklahoma 5 3.2 mb lg 2015-09-18T12:35: 16.600Z 35.9931 -96.7997 3km WNW of Cushing, Oklahoma 0.208 4.1 mwr 2015-09-18T09:33:00.300Z 35.9834 -96 .7962 2km W of Cushing, Oklahoma 4.327 3 ml 2015-09-18T09: 16:55.900Z 35.9909 -96 .7943 2km WNW of Cushing, Oklahoma 5 3.2 mwr 2015-09-18T02: 12:00.440Z 37.473 -98.9575 27km SW of Pratt, Kansas 5.39 3.4 mwr 2015-09-17T15:03:29.500Z 36.8433 -97.8111 7km WNW of Medford, Oklahoma 4.889 3.1 ml 2015-09-16T19:34:02.1 00Z 36.2801 -97.5128 20km W of Perry, Oklahoma 9.424 3 ml 2015-09-16T15: 17:36.300Z 36.3334 -96 .7918 1km ESE of Pawnee, Oklahoma 5 3.3 ml 2015-09-16T12:09:52 .500Z 36.3288 -96.7891 1km SE of Pawnee, Oklahoma 3.093 3.2 mwr 2015-09-16T04:48:01.000Z 36.4802 -98.9418 24km E of Mooreland, Oklahoma 10.742 3.7 mwr 2015-09-16T02:30:01.900Z 35 .9778 -96.7949 2km WSW of Cushing, Oklahoma 4.019 3.7 mwr 2015-09-15T23:45:32.690Z 36.482 -98 .921 25km E of Mooreland, Oklahoma 5 3.6 ml 2015-09-15T22:57: 13.200Z 36.4821 -98.9374 24km ENE of Mooreland, Oklahoma 6.273 3.4 ml 2015-09-15T16:28:43.200Z 35 .671 -97.415 6km ENE of Edmond , Oklahoma 3.076 3.1 ml 2015-09-15T13:58:40.800Z 35.5128 -97.3032 3km WNW of Choctaw, Oklahoma 6.372 3 ml 2015-09-15T02:12:31.200Z 36.0732 -97.4407 19km NE of Crescent, Oklahoma 2.087 3 ml 2015-09-14T17:25:29.100Z 35.7437 -97 .3552 15km NE of Edmond , Oklahoma 5.391 3.3 ml 2015-09-14T07:04:30.200Z 36.2785 -97 .5116 20km W of Perry, Oklahoma 6.851 3.1 ml 2015-09-14T02:06:24.500Z 36.0713 -97.4386 19km NE of Crescent, Oklahoma 5.197 3.1 ml 2015-09-14T00:04:52. 700Z 36.0694 -97.439 19km NE of Crescent, Oklahoma 5.387 3.2 ml 2015-09-12T13:47:08.800Z 35.7444 -97.3549 15km NE of Edmond, Oklahoma 6.457 3.1 ml 2015-09-12T10:55:44.300Z 35.9853 -97 .5616 4km NE of Crescent, Oklahoma 6.369 3.2 ml 2015-09-12T00:55:33.250Z 37.059 -97.9318 13km SE of Anthony, Kansas 6.25 3.3 ml 2015-09-1OT19:26:57.300Z 36 .9027 -97.6825 11 km NNE of Medford, Oklahoma 6.56 3.4 mwr 2015-09-1OT18:41 :33.800Z 36.0301 -97.1221 10km NW of Perkins, Oklahoma 5.336 3.1 ml 2015-09-1 0T01 :05:28.000Z 36.1808 -97.4857 21 km SW of Perry, Oklahoma 5.638 3.3 ml 2015-09-09T03:42:48.800Z 36.1824 -97.4975 22km WSW of Perry, Oklahoma 3.473 3.5 mwr 2015-09-08T21 :26:20.400Z 36.178 -97.4857 21 km SW of Perry, Oklahoma 5.819 3.3 ml 2015-09-08T03:34:22.500Z 36.5293 -98.4921 19km W of Helena, Oklahoma 4.592 3 ml 2015-09-02T23:52:24.000Z 36.9389 -98.0182 23km S of Anthony, Kansas 5.589 3.4 ml 2015-09-02T14:01 :26.240Z 35.949 -96.781 4km SSW of Cushing, Oklahoma 3.7 3.3 mwr 2015-09-02T13:50:02.530Z 36.488 -98.511 22km WSW of Helena, Oklahoma 4.4 3.5 mwr 2015-09-01T18:00:46.400Z 35.9507 -96.7805 4km SSW of Cushing, Oklahoma 4.102 3 ml 2015-09-01 T11 :41 :00.080Z 37.0607 -97 .5232 8km ENE of Caldwell, Kansas 5.98 3.1 ml 2015-09-01 T09:43:50.000Z 35.9486 -96.7844 4km SSW of Cushing, Oklahoma 3.892 3.4 ml Facility Decommissioning Plan - Rev 2 February 2021 Page 27 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 MaQ. Tvoe 1 2015-08-31 T 14 :44: 09. 20oz 36.7851 -98.4536 9km WNW of Cherokee, Oklahoma 0.123 3.5 ml 2015-08-31T01 :04:03.2002 35.7457 -97 .359 14km NE of Edmond, Oklahoma 5 3 ml 2015-08-30112:19:23.9002 35.675 -97 .399 7km ENE of Edmond, Oklahoma 6.01 3.4 mwr 2015-08-30108:27:26.3002 36.8066 -98 .3452 5km N of Cherokee, Oklahoma 4.67 3.5 ml 2015-08-30106: 16: 10.3002 36.5111 -99.0493 16km ENE of Mooreland, Oklahoma 0.876 3.1 ml 2015-08-30101 :08:33.1 00Z 36.6379 -97.6453 20km SSE of Medford, Oklahoma 5.383 3 ml 2015-08-29114:39:05.9602 37.06 -97.5243 7km ENE of Caldwell, Kansas 5.91 3.1 ml 2015-08-29100:36: 19.100Z 36.0307 -97.1211 10km SSW of Stillwater, Oklahoma 5.016 3.1 ml 2015-08-28122:05:54.7002 36.076 -97 .5812 13km N of Crescent, Oklahoma 5.228 3.3 ml 2015-08-27100:56:22.9002 36.8497 -97.6976 5km NE of Medford, Oklahoma 4.476 3 ml 2015-08-26107:41 :06.000Z 36.9367 -97.6841 12km SSW of Caldwell, Kansas 5 3 ml 2015-08-26107:33:07.000Z 36.8844 -98.1341 24km NE of Cherokee , Oklahoma 0 3.4 ml 2015-08-26105:05:27.8002 36.2767 -97.2667 2km SE of Perry, Oklahoma 4.469 3.2 ml 2015-08-25122:04:53.2302 36.2788 -97.2812 1km SSE of Perry, Oklahoma 3.84 3 mb lg 2015-08-25112:59:25.3002 36.0338 -97 .1195 10km SSW of Stillwater, Oklahoma 3.263 3.3 mwr 2015-08-25112:18:37.000Z 36.8561 -97 .3994 11 km WNW of Blackwell, Oklahoma 5.381 3 ml 2015-08-25103:34:49.3002 36.0024 -97 .1037 7km WNW of Perkins, Oklahoma 2.442 3.1 ml 2015-08-24116:09:41.5902 35.829 -97.406 5km SSE of Guthrie, Oklahoma 5.8 3 ml 2015-08-23116:21 :35.3002 36.0299 -97.1194 9km NW of Perkins, Oklahoma 5.773 3.3 mwr 2015-08-23115:00:57.000Z 36.5972 -97.698 23km S of Medford, Oklahoma 6.835 3.3 ml 2015-08-23113:53:07.6602 36.282 -97.511 20km W of Perry, Oklahoma 3.55 3.1 mb lg 2015-08-23104:30: 12.4002 36.7647 -98 .5403 12km ESE of Alva, Oklahoma 2.12 3.4 ml 2015-08-22108:46:49.5002 36.8416 -97 .8271 9km WNW of Medford, Oklahoma 5.256 3.8 mwr 2015-08-20113: 17:54.9602 37.0535 -97 .9138 15km SE of Anthony, Kansas 6.26 3.4 ml 2015-08-20108:28: 11.4402 36.2877 -97.5317 21 km W of Perry, Oklahoma 1.11 3.3 mwr 2015-08-20100:49:17.7002 36.8484 -98.2548 13km NE of Cherokee, Oklahoma 3.933 3.5 ml 2015-08-20100:47:12.7002 36.8441 -98 .2687 12km NE of Cherokee, Oklahoma 4.001 3.6 mwr 2015-08-19123: 13:47.3002 36.5508 -98.4616 17km W of Helena, Oklahoma 5.227 3.3 ml 2015-08-18104:40:29.9302 36.2915 -97 .533 22km W of Perry, Oklahoma 6.84 3.3 ml 2015-08-17111 :53:56.4002 35.336 -96 .67 12km N of Seminole, Oklahoma 5.4 3.3 ml 2015-08-17110:57:32.1 ooz 36.8963 -97.686 10km NNE of Medford, Oklahoma 1.516 3.3 ml 2015-08-16111 :06:36.7002 36.9308 -97.6796 12km SSW of Caldwell, Kansas 2.167 3.1 ml 20 '15-08-*t 6108:49:50.7002 36.8398 -97 .8231 8km WNW of Medford, Oklahoma 4.25 3.4 ml 2015-08-16100:00:58 .3002 36.8433 -97 .8222 8km WNW of Medford, Oklahoma 3.382 3 ml 2015-08-15112:36:25.7002 35.984 -97 .5508 5km NE of Crescent, Oklahoma 5.372 3 ml 2015-08-15103:34: 22. oooz 36.4813 -98 .9184 26km E of Mooreland, Oklahoma 6.467 3.2 ml 2015-08-14121 :25:40.6002 36.8311 -97 .8011 6km WNW of Medford, Oklahoma 0.091 4.1 mwr 2015-08-13120:02:10.81 OZ 36.0809 -97.22 15km WSW of Stillwater, Oklahoma 5 3.3 mwr 2015-08-13117:15:03.9002 36.8478 -97.8797 13km WNW of Medford, Oklahoma 5 3.3 ml 2015-08-13114:48:09.7002 35.7455 -97.39 13km NE of Edmond , Oklahoma 6.15 3.1 ml 2015-08-13113:59:41 .8002 35.7451 -97.3894 13km NE of Edmond, Oklahoma 5 3.4 ml 2015-08-13104: 15:25.9902 36.2783 -97.5198 20km W of Perry, Oklahoma 5.4 3.1 mwr 2015-08-13100:36:59 .2002 36.8171 -97 .6173 10km E of Medford, Oklahoma 4.842 3 ml 2015-08-11104:49:06.5002 36.6214 -97.8112 21 km SSW of Medford, Oklahoma 5 3 ml 2015-08-10120:47:35.5602 36.9726 -97 .9597 21 km SSE of Anthony, Kansas 5 3.1 mb lg 2015-08-10117:39:38.3002 36.6773 -98.1522 17km NE of Helena, Oklahoma 5.705 3.5 ml 2015-08-10101 :44: 13.6002 36.9297 -97 .6816 13km SSW of Caldwell, Kansas 0.113 3 ml 2015-08-09116:26:34.3002 36.7893 -98.2648 9km ENE of Cherokee, Oklahoma 4.936 3.1 ml 2015-08-09107:05:33.2002 36.8348 -97.7968 6km WNW of Medford, Oklahoma 0.672 3.5 ml 2015-08-09102:56: 18.5002 35.439 -97.109 1km WNW of McLoud, Oklahoma 6.9 3.6 ml 2015-08-08113:57:32 .9502 37.0518 -97.9182 15km SE of Anthony, Kansas 6.98 3.2 ml 2015-08-08101 :48:09.4002 36.1999 -96 .7535 10km NNW of Yale, Oklahoma 4.327 3.3 ml 2015-08-07121 :43:03.000Z 35.937 -97.0753 5km SW of Perkins, Oklahoma 4.663 3 ml 2015-08-07114:51 :58.8002 36.6936 -98.664 12km S of Alva, Oklahoma 2.407 3.1 ml 2015-08-07103:04: 12.8002 35.4348 -96.5201 7km SSW of Boley, Oklahoma 3.501 3 ml 2015-08-06103:51: 14.5002 36.5353 -97 .8395 15km NNE of Enid, Oklahoma 4.69 3.1 ml 2015-08-05123:09:33. 7002 36.63 -97.812 20km SSW of Medford, Oklahoma 3.062 3.3 ml 2015-08-05115:55:11 .3002 36.6587 -97.7235 16km S of Medford, Oklahoma 8.782 3 ml Facility Decommissioning Plan - Rev 2 February 2021 Page 28 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 Maq. Tvpe 1 2015-08-05T14:23:48.920Z 36.2812 -97.5334 22km W of Perry, Oklahoma 5 3.2 mwr 2015-08-05T13:07:12.700Z 35.9209 -97.3349 7km WSW of Langston, Oklahoma 5.448 3.2 ml 2015-08-05T12:01: 12.600Z 36.8315 -97.8011 6km WNW of Medford, Oklahoma 2.567 3.5 ml 2015-08-05T07:48:02.300Z 36.5979 -97.6921 23km S of Medford, Oklahoma 6.021 4 ml 2015-08-05T07:30:01 .000Z 36.5972 -97.6914 23km S of Medford , Oklahoma 6.704 3.4 ml 2015-08-05T03:42:30.880Z 36.2883 -97.5218 20km W of Perry, Oklahoma 7.63 3.2 ml 2015-08-04T22:54:23.1 00Z 35.7955 -97.3163 13km SE of Guthrie, Oklahoma 0.106 3 ml 2015-08-04T18: 16:29.600Z 36.838 -97.804 7km WNW of Medford, Oklahoma 3.692 3.4 ml 2015-08-04T08:58:09.900Z 36.836 -98.2917 10km NNE of Cherokee, Oklahoma 4.303 3.2 ml 2015-08-03T22:08:40.900Z 36.689 -98.6069 13km SSE of Alva, Oklahoma 4.033 3.1 ml 2015-08-02T14:43:51.300Z 36.765 -98.542 11 km ESE of Alva, Oklahoma 6.3 3 ml 2015-08-01 T20:28:48.500Z 36.6836 -97.8592 17km SW of Medford, Oklahoma 6.607 3.3 mwr 2015-07-31T13:26:55. 700Z 36.0594 -97.2497 12km N of Langston, Oklahoma 2.195 3.3 ml 2015-07-31T01 :39:21.400Z 35.9798 -97.5559 4km NE of Crescent, Oklahoma 0.133 3.3 ml 2015-07-28T12:30:36.800Z 35.9851 -97.5565 4km NE of Crescent, Oklahoma 4.536 3.3 ml 2015-07-28T08:11 :57.500Z 36.2874 -97 .5162 20km W of Perry, Oklahoma 7.414 3.5 ml 2015-07-28T01 :18:27.200Z 35.9909 -97.5813 4km NNE of Crescent, Oklahoma 5.253 4.1 mwr 2015-07-28T00:24:03.400Z 35.9886 -97.5789 4km NNE of Crescent, Oklahoma 4.658 3.5 ml 2015-07-27T19:27:56.900Z 35.9885 -97.577 4km NNE of Crescent, Oklahoma 5 3 ml 2015-07-27T18: 12: 15.400Z 35.9889 -97.5717 4km NNE of Crescent, Oklahoma 5 4.5 mwr 2015-07-27T17:49:27.900Z 35.9908 -97.56 5km NE of Crescent, Oklahoma 4.01 3.8 mwr 2015-07-27T17:06:30.500Z 35.9875 -97.5606 4km NE of Crescent, Oklahoma 5.647 3.4 ml 2015-07-27T12:31 :46.600Z 35.9886 -97.5602 5km NE of Crescent, Oklahoma 5.68 3 ml 2015-07-27T09:25:04.800Z 36.8348 -97 .8067 7km WNW of Medford, Oklahoma 5 3.2 ml 2015-07-26T13:26:50.480Z 35.9983 -97.5691 5km NNE of Crescent, Oklahoma 4.19 3.2 mb lg 2015-07-26T11 :30:47.300Z 36.519 -99.009 19km ENE of Mooreland, Oklahoma 5 3.2 ml 2015-07-26T09:54:33.600Z 35.989 -97 .5694 4km NNE of Crescent, Oklahoma 5.468 3.6 mwr 2015-07-26T09: 15:05.500Z 35.95 -96.78 4km SSW of Cushing, Oklahoma 5.1 3 ml 2015-07-26T06:59:44.600Z 35.9877 -97.5661 4km NNE of Crescent, Oklahoma 5.964 3.2 ml 2015-07-25T11: 14:44.100Z 35.9902 -97 .5661 4km NNE of Crescent, Oklahoma 4.269 3.7 mwr 2015-07-25T08:47:53.100Z 36.3397 -96 .8201 1km W of Pawnee, Oklahoma 1.296 3 ml 2015-07-25T04:49:02.700Z 36.159 -96.948 11 km ENE of Stillwater, Oklahoma 4.2 3 ml 2015-07-25T04: 10:33.7002 36.6047 -97 .6 "149 24km SSE of Medford, Oklahoma 5.161 3.2 ml 2015-07-24T16:21 :23.000Z 36.8416 -98.2303 14km NE of Cherokee, Oklahoma 5.208 3.1 ml 2015-07-24T16:01 :01.700Z 36.296 -97 .5234 21 km W of Perry, Oklahoma 8.233 3.1 ml 2015-07-24T12:31 :13.900Z 36.615 -98.4056 14km WNW of Helena, Oklahoma 3.497 3.5 mwr 2015-07-23T17:33: 19.900Z 35.4476 -97 .1152 2km WNW of McLoud, Oklahoma 6.039 3 ml 2015-07-23T13:28:57.500Z 36.3404 -96.8037 0km N of Pawnee, Oklahoma 5 3.3 ml 2015-07-23T12:20:55.500Z 36.3439 -96.7945 1km NE of Pawnee, Oklahoma 4.323 3.3 ml 2015-07-22T10:48:27.300Z 36.6004 -97 .6848 23km S of Medford, Oklahoma 6.216 3.2 ml 2015-07-22T01 :19:30.800Z 36.8464 -98 .2284 15km NE of Cherokee, Oklahoma 0.149 3.2 ml 2015-07-21T18:24:08.200Z 36.8367 -98 .2445 13km NE of Cherokee , Oklahoma 5.338 3.5 ml 2015-07-21T13: 10:54.020Z 36.284 -97.638 23km E of Waukomis, Oklahoma 4 3 ml 2015-07-21 T11: 16: 13.800Z 36.837 -98.245 13km NE of Cherokee, Oklahoma 5 3.1 mwr 2015-07-21 T09:08:41.600Z 36.834 -98.25 12km NE of Cherokee, Oklahoma 4.946 3.5 ml 2015-07-21 T08:46:54.1 00Z 36.2821 -97.6428 22km E of Waukomis, Oklahoma 2.959 3.2 mwr 2015-07-21T07:38:28.900Z 36.2807 -97.4588 15km W of Perry, Oklahoma 1.106 3 ml 2015-07-21T05:02:04.400Z 36.6 -97.6892 23km S of Medford, Oklahoma 5.696 3.3 ml 2015-07-21T02:10:21.400Z 36.8477 -98 .2588 13km NE of Cherokee, Oklahoma 3.909 3.4 ml 2015-07-20T20:54:32.1 00Z 36.8458 -98.2516 13km NE of Cherokee, Oklahoma 5 3.7 mwr 2015-07-20T20:50: 16.000Z 36.3875 -96.8597 7km NW of Pawnee, Oklahoma 5 3.4 ml 2015-07-20T20: 19:03.400Z 36.842 -98.2593 13km NE of Cherokee, Oklahoma 4.079 4.4 mwr 2015-07-20T03:33:24.000Z 36.8713 -97.895 16km WNW of Medford , Oklahoma 3.961 3.1 ml 2015-07-17T12:30:37.800Z 36.5245 -98.4652 17km W of Helena, Oklahoma 4.632 3.6 mwr 2015-07-15T08:57: 15.900Z 35.9874 -97 .5652 4km NE of Crescent, Oklahoma 4.136 3.4 mwr 2015-07-14T10:58:51.900Z 35.8174 -97.4461 7km SSW of Guthrie, Oklahoma 4.783 3.2 ml 2015-07-14T08:22:15.000Z 34.9775 -97.6798 17km S of Blanchard, Oklahoma 4.776 3.2 mwr 2015-07-14T01 :33:58.700Z 35.7419 -97.5763 13km NW of Edmond, Oklahoma 6.169 3.4 ml Facility Decommissioning Plan - Rev 2 February 2021 Page 29 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 2015-07-12T22:37:21.7002 36.8682 -98.0086 25km WNW of Medford, Oklahoma 5.425 3.1 ml 2015-07-11T21:52:09.1002 36.5264 -98.4653 17km W of Helena, Oklahoma 5 3.1 ml 2015-07-11T09:23:35.3002 36.0247 -97 .1049 8km NW of Perkins, Oklahoma 3.855 3.7 mwr 2015-07-11T01 :21 :19.7002 36.294 -97.523 21 km W of Perry, Oklahoma 7.2 3.1 ml 2015-07-11T00:56:53.0002 36.2891 -97.5168 20km W of Perry, Oklahoma 7.44 3.6 ml 2015-07-1 0T23:09:16.7002 36.662 -98.2852 12km SSE of Cherokee, Oklahoma 5.426 3.7 mwr 2015-07-1 0T09:58:56.7002 36.5222 -98.4682 17km W of Helena, Oklahoma 4.243 3.5 ml 2015-07-09T06:45: 19.6002 35.6663 -97.0947 9km E of Luther, Oklahoma 5 3 ml 2015-07-08T16:33:28.7002 35.7412 -97 .3835 13km NE of Edmond, Oklahoma 6.21 3.4 ml 2015-07-08T01: 13:20.5002 36.8427 -97.8828 13km WNW of Medford, Oklahoma 5.499 3 ml 2015-07-07T10:53: 12.3002 35.7443 -97.3747 13km NE of Edmond, Oklahoma 5 3.1 ml 2015-07-06T06:20:39. 7002 35.7446 -97.3762 13km NE of Edmond , Oklahoma 5.581 3.3 ml 2015-07-04T21 :00:27.7002 36.52 -98.4749 18km W of Helena, Oklahoma 3.151 3.6 ml 2015-07-04T12:33:51.5002 36.7615 -97.5569 16km ESE of Medford , Oklahoma 5 3.1 ml 2015-07-04T11 :57:56.6002 36.281 -97.516 20km W of Perry, Oklahoma 5.7 3.3 mwr 2015-07-04T01 :05:22.7002 36.293 -96.861 7km SW of Pawnee, Oklahoma 3.8 3.4 mwr 2015-07-03T10:43:54.5002 36.757 -97 .565 16km ESE of Medford, Oklahoma 6.445 3 ml 2015-07-03T05:19:31.6002 36.2812 -97 .5192 20km W of Perry, Oklahoma 5 3.5 mwr 2015-07-02T22:40:35.0002 36.8242 -97 .7204 2km NNE of Medford, Oklahoma 4.914 3.1 ml 2015-07-02T20:28:37.2002 36.4207 -97.3336 15km NNW of Perry, Oklahoma 5 3.2 ml 2015-07-01T21 :59:53.8002 36.0707 -97.437 19km NE of Crescent, Oklahoma 5.508 3.3 ml 2015-07-01T17:15:47.9002 36.0912 -97.1003 4km SW of Stillwater, Oklahoma 3.848 3.5 mwr 2015-06-30T21 :42:00.3002 35.9159 -97.3133 6km WSW of Langston, Oklahoma 5.079 3.2 ml 2015-06-30T11 :20:07.6002 35.594 -97 .373 7km N of Spencer, Oklahoma 4.3 3.3 ml 2015-06-29T04:12:37.4002 36.9196 -97 .8632 17km NW of Medford, Oklahoma 0.165 3.5 ml 2015-06-29T02: 46: 07. 9002 36.9507 -97.6913 11 km SW of Caldwell, Kansas 5 3.1 ml 2015-06-28T22:38:25.4002 36.3203 -96.8228 2km SW of Pawnee, Oklahoma 3.41 3.1 ml 2015-06-28T15:36:50. 7002 36.0789 -97.5853 14km N of Crescent, Oklahoma 5.642 3.1 ml 2015-06-28T14:37: 15.4002 36.2889 -97.5203 20km W of Perry, Oklahoma 6.481 3.3 ml 2015-06-28T01 :35: 19.7002 36.6779 -98 .1617 17km NNE of Helena, Oklahoma 5 3.4 mwr 2015-06-27T22:49:06.8002 36.5909 -97 .5649 24km WSW of Tonkawa, Oklahoma 5.961 3.1 ml 2015-06-27T20:09: 16.4002 36.9449 -97.6328 9km SSW of Caldwell, Kansas 5.357 3 ml 2015-06-27T13:03:03.2002 36.5373 -97 .7295 20km NE of Enid, Oklahoma 4.994 3 ml 2015-06-27T03:31 :28.2002 36.7458 -98.2238 11 km E of Cherokee, Oklahoma 4.61 3.5 mwr 2015-06-27T02:38: 11. 7002 35.8769 -97.0439 10km S of Perkins, Oklahoma 5 3 ml 2015-06-27T00:56:43.0002 36.8519 -97.6976 5km NNE of Medford, Oklahoma 6.76 3.2 ml 2015-06-26T10:49:58.8002 35.74 -97.379 13km NE of Edmond, Oklahoma 4.8 3.4 ml 2015-06-26T10: 18:35. 7002 36.101 -97.344 19km NNW of Langston, Oklahoma 5 3.1 ml 2015-06-26T06: 19:23.2002 35.7436 -97.3771 13km NE of Edmond, Oklahoma 5.752 3.4 ml 2015-06-26T05:54:03.8002 35.7417 -97.3796 13km NE of Edmond, Oklahoma 5 3.7 mwr 2015-06-26T04:35:56.3002 35.739 -97.388 12km NE of Edmond , Oklahoma 4.9 3.5 mwr 2015-06-25T12:54:25.0002 35.8185 -97.4388 6km S of Guthrie, Oklahoma 4.04 3 ml 2015-06-25T06:03:06.8002 36.7312 -98.3156 4km SE of Cherokee, Oklahoma 5.73 3.1 nil 2015-06-23T17:37:55.4002 36.688 -98.6114 13km SSE of Alva, Oklahoma 4.526 3.4 ml 2015-06-22T22: 16:20.8002 35.743 -97 .3876 12km NE of Edmond, Oklahoma 5.534 3.9 mwr 2015-06-22T21 :09:27.9002 35.7499 -97.4005 12km NNE of Edmond, Oklahoma 5 3.5 ml 2015-06-22T21:06:30.1002 35.7477 -97.3989 12km NE of Edmond, Oklahoma 5.854 3.6 mwr 2015-06-22T19:47:26.9002 35.8169 -97.4468 7km SSW of Guthrie, Oklahoma 5.454 3.4 ml 2015-06-22T04:54: 12.6002 36.2134 -97 .5616 25km WSW of Perry, Oklahoma 5.625 3.4 mwr 2015-06-22T04:05:43.1002 35.7429 -97.394 12km NE of Edmond, Oklahoma 5.278 3 ml 2015-06-22T04:00:34.6002 35.7437 -97.3836 13km NE of Edmond, Oklahoma 6.181 3.2 mwr 2015-06-21T18:58: 12.0002 36.2855 -97.52 20km W of Perry, Oklahoma 6.33 3.3 ml 2015-06-21T17:51 :38.0002 36.2917 -96.8601 7km SW of Pawnee, Oklahoma 5 3.4 ml 2015-06-21T12:25:00.0002 36.5534 -97.1898 17km SE of Tonkawa, Oklahoma 6.12 3.1 ml 2015-06-21 T00:58:56.0002 35.7475 -97.4006 12km NNE of Edmond, Oklahoma 5.882 3.4 ml 2015-06-20T21 :07:02.4002 35.7428 -97.3843 13km NE of Edmond, Oklahoma 6.149 3.1 ml 2015-06-20T15:50:37.4002 36.2938 -97.5363 22km W of Perry, Oklahoma 6.006 3 ml 2015-06-20T11 :59:21.4002 36.2884 -96 .8624 7km SW of Pawnee, Oklahoma 5 3.3 ml Facility Decommissioning Plan - Rev 2 February 2021 Page 30 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 Lonaitude Epicenter Depth (km) Magnitude Maa. Tvoe 1 2015-06-20T11 :21: 16.0002 35.739 -97.3839 12km NE of Edmond, Oklahoma 5.35 3.4 mwr 2015-06-20T10:56:03.2002 35.7469 -97.3998 12km NE of Edmond, Oklahoma 5.589 3.3 mwr 2015-06-20T06:46:05.6002 35.7417 -97.3866 12km NE of Edmond, Oklahoma 5 3 ml 2015-06-20T06:26:01.2002 35.9022 -97.2608 4km S of Langston, Oklahoma 4.929 3.1 ml 2015-06-20T05:23:01 .5002 35.746 -97.3989 12km NE of Edmond, Oklahoma 5.376 3.4 ml 2015-06-20T05: 10:54. 9002 35.7392 -97.3865 12km NE of Edmond, Oklahoma 3 4 mwr 2015-06-20T04:36:05.6002 35.7446 -97.3924 12km NE of Edmond, Oklahoma 5.667 3.5 ml 2015-06-20T04:29:03.6002 35.7447 -97.3919 12km NE of Edmond, Oklahoma 5.649 3.6 ml 2015-06-19T21 :56:04.8002 36.8521 -98.276 13km NNE of Cherokee, Oklahoma 5.774 3.2 ml 2015-06-19T16:23:48.0002 36.1248 -97.2797 18km S of Perry, Oklahoma 3.542 3 ml 2015-06-19T13:16:07.7002 36.2957 -97.5337 22km W of Perry, Oklahoma 6.339 3.1 ml 2015-06-19T03:07:26.4002 36.2954 -97.5346 22km W of Perry, Oklahoma 5.16 3 ml 2015-06-18T23:10:17.0002 35.7735 -97.4843 12km SSW of Guthrie, Oklahoma 6.87 3.5 ml 2015-06-18T23:02:58.0002 35.7719 -97.4822 12km SSW of Guthrie, Oklahoma 7.019 3 ml 2015-06-18T22:29: 14.0002 36.3035 -96.6757 12km ESE of Pawnee, Oklahoma 5.015 3 ml 2015-06-17T19:21: 12.2002 36.2904 -97.5408 22km W of Perry, Oklahoma 6.433 3.1 ml 2015-06-17T19:17:08.7002 36.285 -97.523 21 km W of Perry, Oklahoma 6.008 4.3 mwr 2015-06-16T15:35:57.6002 36 .5158 -97.2814 18km S of Tonkawa, Oklahoma 4.871 3.1 ml 2015-06-16T03:59: 15.5202 36.511 -98.706 32km S of Alva, Oklahoma 5 3.1 ml 2015-06-16T02:20:36.9002 36.3028 -96.6614 13km ESE of Pawnee, Oklahoma 4.651 3.2 ml 2015-06-15T19:49:06.5602 37.0179 -97 .9107 18km SE of Anthony, Kansas 5 3.4 mb lg 2015-06-14T19: 10:44.0002 36.2924 -97.5306 21 km W of Perry, Oklahoma 6.02 3.3 mwr 2015-06-14T18: 17:09.0002 36.286 -97.5217 20km W of Perry, Oklahoma 6.278 4 mwr 2015-06-14T05:57:24.8002 36 .2884 -97.5251 21 km W of Perry, Oklahoma 6.462 3.2 ml 2015-06-13T20:54:42.6002 36 .2676 -97.3864 9km WSW of Perry, Oklahoma 7.12 3.3 mwr 2015-06-13T07:33:34.2002 36.5033 -97.1454 21 km SSW of McCord, Oklahoma 5.776 3 ml 2015-06-13T06:40: 12.2002 36.2972 -96.6676 13km ESE of Pawnee, Oklahoma 5 3.1 ml 2015-06-12T23:20:03.6002 36.296 -96.6732 12km ESE of Pawnee, Oklahoma 0.978 3.4 ml 2015-06-12T22:42:23.9002 36.3009 -96 .674 12km ESE of Pawnee, Oklahoma 0.355 3.7 mwr 2015-06-12T22:35:38.8002 35.5581 -97.1252 8km NNE of Harrah, Oklahoma 6.527 3.5 ml 2015-06-12T04:38:26.5002 36.292 -97.534 22km W of Perry, Oklahoma 6.1 3.6 mwr 2015-06-11T23:31 :37.9002 36.2829 -97.5185 20km W of Perry, Oklahoma 5.651 3.7 mwr 2015-06-11 T23:28:59 .6002 36.286 -97.5236 21 km W of Perry, Oklahoma 5.555 3.5 mwr 2015-06-11 T22:55:55.9002 36.8722 -98.8326 16km WNW of Alva, Oklahoma 2.518 3 ml 2015-06-11T10:18:18.0002 36.2932 -97.5259 21 km W of Perry, Oklahoma 5.658 3.2 ml 2015-06-11 T02:25: 13.4002 36.6241 -97.667 21 km SSE of Medford, Oklahoma 5 3 ml 2015-06-1OT13:05:08.9402 36.288 -97.518 20km W of Perry, Oklahoma 8 3.4 mwr 2015-06-09T19:47:56.6002 36.7434 -98.2235 11 km E of Cherokee, Oklahoma 4.753 3.3 ml 2015-06-09T01 :26:51.4002 36.286 -97.5312 21 km W of Perry, Oklahoma 6.171 3.7 mwr 2015-06-08T21 :36:58.5002 36.2852 -97.5219 21 km W of Perry, Oklahoma 2.959 3.9 mwr 2015-06-08T13:20: 16.0002 36.3916 -98 .6607 21 km NW of Fairview, Oklahoma 4.027 3.9 ml 2015-06-08T04:28: 16.2402 37.232 -97.9583 8km SE of Harper, Kansas 5.66 3.4 mb lg 2015-06-07T20:20:25.8602 36.844 -97.7617 4km NNW of Medford, Oklahoma 5 3.3 mb lg 2015-06-07T17:15:21 .0002 35.6767 -97.3974 7km ENE of Edmond, Oklahoma 5 3.5 ml 2015-06-07T12:56:06..9002 36.944 -97.6353 10km SSW of Caldwell, Kansas 6.509 3.1 ml 2015-06-06T15:55:26.0002 36.2515 -97.5339 22km W of Perry, Oklahoma 6.668 3 ml 2015-06-05T23: 12:47.4502 37.2648 -97.9213 9km ESE of Harper, Kansas 2.35 4.1 mwr 2015-06-05T23: 12:41.2702 37.2194 -97.9677 9km NE of Anthony, Kansas 5.11 3.6 mb 2015-06-05T22:53:05.1402 37.2214 -97.9528 9km SE of Harper, Kansas 7.36 3.2 mb lg 2015-06-05T18:31 :35.2002 36.1659 -96.9835 8km NE of Stillwater, Oklahoma 5.237 3.2 ml 2015-06-05T17:57:48.3002 36.6636 -98.2951 11 km SSE of Cherokee, Oklahoma 4.632 3.3 ml 2015-06-05T13:28: 17 .1002 36.3187 -97.5 191 20km W of Perry, Oklahoma 6.92 3 ml 2015-06-04T18:02:03.4002 35.7864 -96.9885 13km NW of Chandler, Oklahoma 6.06 3.4 ml 2015-06-04T10:49:03.0002 36.5145 -97.2556 18km SSE of Tonkawa, Oklahoma 6.23 3.2 ml 2015-06-04T00: 17:52.2002 36.8023 -98.5401 11 km E of Alva , Oklahoma 5 3.2 ml 2015-06-03T05:55:39.9002 35.7885 -96.9896 13km NW of Chandler, Oklahoma 6.854 3 ml 2015-06-03T05:28:28.0002 35.7866 -96.9874 13km NW of Chandler, Oklahoma 6.113 3.6 ml 2015-06-02T21 :34:56.2002 35.7877 -96.9885 13km NW of Chandler, Oklahoma 5.758 3.7 ml Facility Decommissioning Plan - Rev 2 February 2021 Page 31 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 MaQ. Type 1 2015-06-02T07:55:51.200Z 36.952 -97.618 8km S of Caldwell, Kansas 7.6 3.6 mwr 2015-06-02T06:45:22.400Z 36.9443 -97.6187 9km S of Caldwell, Kansas 5 3 ml 2015-06-02T04:58: 19. 700Z 36.2674 -98 .5366 5km W of Fairview, Oklahoma 8.433 3 ml 2015-06-02T04: 18:58. 100Z 36.2626 -97.3869 9km WSW of Perry, Oklahoma 7.077 3 ml 2015-06-02T00:58:09.260Z 37.0317 -97.9035 17km SE of Anthony, Kansas 5.35 3 mb lg 2015-06-01T21 :31 :56.500Z 35.7859 -96.9874 13km NW of Chandler, Oklahoma 6.55 3.3 ml 2015-06-01T19: 19:43.8002 35.788 -96.9872 13km NW of Chandler, Oklahoma 6.269 3.5 ml 2015-06-01T17:35:34.000Z 35.7887 -96.9871 13km NW of Chandler, Oklahoma 6.167 3.5 mwr 2015-06-01T15: 19:56.1 0OZ 35.9226 -97.3367 7km WSW of Langston, Oklahoma 5.973 3.1 ml 2015-05-31T20:18:22.000Z 36.7083 -98.6523 10km S of Alva, Oklahoma 4.869 3.1 ml 2015-05-3or21 : 1o: 24. 080z 37.0506 -97.9219 14km SE of Anthony, Kansas 5.19 3.2 mb lg 2015-05-30T11 :21 :40.050Z 37.0411 -97.9047 16km SE of Anthony, Kansas 5 3.6 mwr 2015-05-28T12:00:27.000Z 36.1356 -97.2794 17km S of Perry, Oklahoma 5.664 3.5 mwr 2015-05-28T00:38:21.200Z 35.7458 -97.3888 13km NE of Edmond, Oklahoma 5.778 3 ml 2015-05-27T19: 13:23.000Z 36.3055 -96.6613 13km ESE of Pawnee, Oklahoma 5.58 3.1 ml 2015-05-26T23:30:39.100Z 35.9247 -97.3447 8km NE of Guthrie, Oklahoma 5.752 3.1 ml 2015-05-26T22:27:45.600Z 36.5212 -99.0078 19km ENE of Mooreland, Oklahoma 7.24 3 ml 2015-05-26T17:30:44.700Z 36.2471 -97.5317 22km WSW of Perry, Oklahoma 6.973 3 ml 2015-05-26T16:00:07.9002 36.2981 -97.5599 24km W of Perry, Oklahoma 6.915 3 ml 2015-05-26T14:36:26.700Z 36 .2963 -97.5555 24km W of Perry, Oklahoma 7.26 3 ml 2015-05-26T13:50: 15.3002 36.2974 -97 .5585 24km W of Perry, Oklahoma 7.221 3 ml 2015-05-25T12:38:00.8002 35.597 -97.065 13km ESE of Luther, Oklahoma 5.9 3.2 ml 2015-05-24T21 :49:47.91 OZ 37.142 -97.6502 12km NNW of Caldwell, Kansas 6.41 3.4 mb lg 2015-05-23T18:44:28.3602 . 37.4294 -98.9535 30km SW of Pratt, Kansas 5 4 mwr 2015-05-23T15:11 :40.300Z 37.4447 -98.9522 29km SW of Pratt, Kansas 5 3.3 mb lg 2015-05-23T10:46:42.3002 36 .8495 -97 .6975 5km NE of Medford, Oklahoma 7.128 3.2 mwr 2015-05-22T10:57:29. 700Z 36.6184 -98.4082 14km WNW of Helena, Oklahoma 2.412 3.5 mwr 2015-05-22T07: 17: 15.1 00Z 36.5145 -99.0189 18km ENE of Mooreland, Oklahoma 5.876 3 ml 2015-05-21 T11 :03: 15. 700Z 35.9936 -97.2263 5km NNE of Langston, Oklahoma 4.498 3.3 ml 2015-05-21 T02:29: 13.3002 36.1086 -97.3114 18km NNW of Langston, Oklahoma 5.283 3 ml 2015-05-20T10:44:40.6002 36.5144 -99 .0086 19km ENE of Mooreland, Oklahoma 6.243 3.3 ml 2015-05-19T14:54:41 .8002 36.599 -98 .6603 22km S of Alva, Oklahoma 5 3 ml 2015-05-18T21 :45: 13.1 0OZ 36.9407 -97.6341 10km SSW of Caldwell, Kansas 4.659 3 ml 2015-05-18T16:46:50.000Z 35.8265 -97.2238 13km SSE of Langston, Oklahoma 6.318 3 ml 2015-05-18T07: 14:32.4002 36.607 -98.6922 22km S of Alva, Oklahoma 13.73 3.4 ml 2015-05-18T02:52:50.200Z 35.8082 -97.4452 8km SSW of Guthrie, Oklahoma 5.398 3.5 mwr 2015-05-18T02:01 :29.500Z 35.8142 -97.4517 7km SSW of Guthrie, Oklahoma 5.227 3 ml 2015-05-17T20:38:24.500Z 36.9597 -97.5921 8km S of Caldwell, Kansas 4.78 3.1 ml 2015-05-17T18:36:22.2002 35.826 -97.2249 13km SSE of Langston, Oklahoma 6.466 3.4 ml 2015-05-17T15:20:23.2002 36.554 -97.182 17km SE of Tonkawa, Oklahoma 8 3.2 ml 2015-05-16T14:25:17.830Z 35.6035 -97.071 13km ESE of Luther, Oklahoma 5 3 mb lg 2015-05-16T12:03:20.2002 35.6076 -97.0601 13km ESE of Luther, Oklahoma 3.7 3.3 ml 2015-05-15T05:29:54.800Z 36.3348 -96.8174 1km WSW of Pawnee, Oklahoma 5 3.1 ml 2015-05-14T18:39: 16.3002 35 .6682 -97 .3154 10km W of Luther, Oklahoma 3.727 3.2 ml 2015-05-14T10:04:32.71 OZ 37.0308 -97.9074 17km SE of Anthony, Kansas 5 3.3 mb lg 2015-05-14T04:08:45.900Z 36.9396 -97.8487 17km NW of Medford, Oklahoma 5 3.1 ml 2015-05-12T21 :31 :02.600Z 36 .3508 -97 .0811 19km ENE of Perry, Oklahoma 3.888 3.2 ml 2015-05-12T15:59:06.6002 36.5175 -98.9653 23km ENE of Mooreland , Oklahoma 3.522 3.1 ml 2015-05-10T21 :15:23.1302 36.764 -98.688 4km SSW of Alva, Oklahoma 8.2 3.3 ml 2015-05-1 0T04: 11 :25.300Z 36.6239 -97.6898 20km S of Medford, Oklahoma 6.368 3.3 ml 2015-05-1 0T02:57: 13.6002 36.0765 -97.4515 18km NE of Crescent, Oklahoma 4.137 3 ml 2015-05-1 0T01 :33:25.9002 36.8195 -97.7165 2km NE of Medford, Oklahoma 6.627 3.1 ml 2015-05-09T18:41 :40.600Z 36 .9602 -97.5881 8km SSE of Caldwell, Kansas 5.037 3 ml 2015-05-09T03:49:47.100Z 36.935 -97.6407 11 km SSW of Caldwell, Kansas 1.888 3.1 ml 2015-05-09T03:01 :22.1 00Z 36.9432 -97.6373 10km SSW of Caldwell, Kansas 5.644 3 ml 2015-05-08T23: 19:04.8002 36 .0256 -97 .1076 8km NW of Perkins, Oklahoma 5.081 3.2 ml 2015-05-08T23:05:01 .000Z 36.5151 -99.015 18km ENE of Mooreland, Oklahoma 7.567 3.1 ml 2015-05-08T16:43:53.3002 35.8186 -97.2418 14km S of Langston, Oklahoma 2.432 3.2 ml Facility Decommissioning Plan - Rev 2 February 2021 Page 32 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. Tvpe 1 2015-05-08114: 10:03.1 00Z 36.6033 -97.8236 23km NNE of Enid, Oklahoma 5.762 3.5 ml 2015-05-08101 :06:03.900Z 36.5129 -99 .0494 16km ENE of Mooreland, Oklahoma 14.442 3.2 ml 2015-05-07121 :31 :06.200Z 36.5085 -99 .0681 14km ENE of Mooreland, Oklahoma 7.986 3.3 ml 2015-05-07120:01 :24.290Z 37 .203 -98 .0355 5km N of Anthony, Kansas 8.53 3 mb lg 2015-05-07112:48:38.000Z 36.2982 -96.8807 8km WSW of Pawnee, Oklahoma 5 3.1 ml 2015-05-07102:48:50.000Z 35.6071 -97.0542 14km ESE of Luther, Oklahoma 4.28 3 ml 2015-05-07100:58:41.1 00Z 36.1202 -97.5764 18km N of Crescent, Oklahoma 3.332 3 ml 2015-05-06117: 11 :39.400Z 36.3196 -96.7527 5km ESE of Pawnee, Oklahoma 1.137 3.1 ml 2015-05-06114: 10:07.200Z 36.8752 -98.1615 21 km NE of Cherokee, Oklahoma 3.276 3.5 ml 2015-05-06111 :33:21 .300Z 35 .926 -97.345 8km NE of Guthrie, Oklahoma 4.9 3.1 ml 2015-05-06111 :06:08.300Z 35.9228 -97 .342 8km ENE of Guthrie, Oklahoma 3.747 3.4 ml 2015-05-06110:05:07.380Z 37.2721 -98 .0421 2km SW of Harper, Kansas 7.29 3.2 mb lg 2015-05-06109:29: 12.800Z 36.8714 -98.1544 22km NE of Cherokee, Oklahoma 6.744 3.1 ml 2015-05-06l09:12:17.570Z 37.224 -98 .1041 9km SW of Harper, Kansas 3.37 3 mb lg 2015-05-04l23:59:52.200Z 35.6001 -97.0543 14km ESE of Luther, Oklahoma 4.775 3.2 ml 2015-05-04l20:13:31.600Z 36.1157 -97 .2316 15km W of Stillwater, Oklahoma 5.06 3 ml 2015-05-04111 :04:40.400Z 36.3285 -96 .946 12km W of Pawnee, Oklahoma 2.523 3 ml 2015-05-04108: 15:01.300Z 36 .945 -97.639 10km SSW of Caldwell, Kansas 5.377 3 ml 2015-05-04102: 10: 19.000Z 36.513 -98.9824 21 km ENE of Mooreland, Oklahoma 5.398 3 ml 2015-05-04101 :30:06.500Z 36.7264 -97.9166 18km WSW of Medford, Oklahoma 4.12 3.5 ml 2015-05-02117:05:21.1 00Z 36.1381 -96.8551 14km W of Yale, Oklahoma 5.007 3 ml 2015-05-01 l07:32:54.900Z 36.5224 -98.991 21 km ENE of Mooreland, Oklahoma 4.2 3.8 mwr 2015-05-01 l07:26:29.400Z 35.8126 -97 .2417 14km S of Langston, Oklahoma 4.186 3.1 ml 2015-04-29120:30:58.000Z 36.2845 -97 .5163 20km W of Perry, Oklahoma 8.843 3 ml 2015-04-29116:42:26.600Z 36.2841 -97 .5182 20km W of Perry, Oklahoma 5.661 3.8 mwr 2015-04-29115:06: 15.1 O0Z 36.1825 -97.3258 12km SSW of Perry, Oklahoma 4.439 3.1 ml 2015-04-29l05:25:53.200Z 35 .7442 -97.3829 13km NE of Edmond, Oklahoma 5.696 3.2 ml 2015-04-28122: 18:54.480Z 37 .0208 -97.896 18km SE of Anthony, Kansas 7.74 3.6 mwr 2015-04-28l20:59:47.300Z 36 .2827 -97 .5113 20km W of Perry, Oklahoma 5.673 3.3 ml 2015-04-28l00:20:25.500Z 36.558 -98 .1517 10km E of Helena, Oklahoma 6.617 3 ml 2015-04-27122:22: 17.900Z 35 .918 -97.3256 7km WSW of Langston, Oklahoma 5.279 4.1 mwr 2015-04-27106:23: 12.800Z 36.2804 -97.5114 20km W of Perry, Oklahoma 6.789 3.1 ml 2015-04-26119:07:25.800Z 36.2833 -97.5131 20km W of Perry, Oklahoma 4.953 3.3 mwr 2015-04-26113:53:39.21 OZ 35.967 -97 .38 10km NNE of Guthrie, Oklahoma 6.1 3.1 ml 2015-04-26102:43: 16.300Z 36.2732 -96.9406 14km WSW of Pawnee, Oklahoma 4.877 3 ml 2015-04-26l02:29:21.600Z 35.971 -97.382 10km NNE of Guthrie, Oklahoma 4.7 3 ml 2015-04-26101 :43:58.800Z 36.2821 -96.91 11 km WSW of Pawnee, Oklahoma 5.015 3 ml 2015-04-25123: 13:04.300Z 36.4033 -97 .3326 13km NNW of Perry, Oklahoma 7.512 3.4 ml 2015-04-24122 :23:42. 700Z 35 .7474 -97 .3799 13km NE of Edmond, Oklahoma 5.461 3.2 ml 2015-04-24112:32:57.900Z 35 .585 -97.3725 6km N of Spencer, Oklahoma 6.588 3.6 ml 2015-04-24112:01 :09.700Z 36 .116 -97 .58 18km N of Crescent, Oklahoma 3.134 3 ml 2015-04-24106: 16:46.600Z 36.274 -97.463 15km W of Perry, Oklahoma 5.3 3 ml 2015-04-24106: 15:50.200Z 36.7392 -97 .5768 15km ESE of Medford, Oklahoma 3.53 3.2 mb lg 2015-04-23l06:20:40.500Z 36 .624 -97 .6568 21 km SSE of Medford, Oklahoma 5.85 3.7 mwr 2015-04-23105:21 :31 .600Z 36.629 -97 .654 20km SSE of Medford, Oklahoma 6.5 3.4 ml 2015-04-23l05:20:01.400Z 36 .6236 -97.6575 21 km SSE of Medford, Oklahoma 7.098 3 ml 2015-04-22l20:57:04.900Z 36 .9428 -97 .6334 10km SSW of Caldwell, Kansas 6.4 3.4 ml 2015-04-20112:08:31.400Z 36.849 -97 .88 13km WNW of Medford, Oklahoma 5.3 3.4 mwr 2015-04-19l06:28:14.400Z 35 .9188 -97 .3241 6km WSW of Langston, Oklahoma 5.631 3.5 mwr 2015-04-19105:27: 14.800Z 35 .953 -97 .3318 6km W of Langston, Oklahoma 3.16 4.2 mwr 2015-04-18118:34:04.800Z 36.9446 -97.6311 9km SSW of Caldwell, Kansas 5 3.4 mwr 2015-04-17116:48: 16.300Z 35.9196 -97.3268 7km WSW of Langston, Oklahoma 5.433 3.4 ml 2015-04-17110:42:24.000Z 35.9148 -97.4096 4km NNE of Guthrie, Oklahoma 5.977 3.1 ml 2015-04-17l09:37:02.600Z 35 .919 -97.3258 6km WSW of Langston, Oklahoma 5.134 3.3 ml 2015-04-17l09:08:05.800Z 35.9226 -97 .3308 7km WSW of Langston, Oklahoma 3.089 3.8 mwr 2015-04-17l08:37:11 .200Z 35.9211 -97.33 7km WSW of Langston, Oklahoma 4.359 3.6 mwr 2015-04-16115:49:45.820Z 36.5274 -98 .9408 25km ENE of Mooreland, Oklahoma 8.8 3.5 ml 2015-04-15119:12:36.800Z 36.3294 -97.5229 21 km WNW of Perry, Oklahoma 6.978 3.3 ml Facility Decommissioning Plan - Rev 2 February 2021 Page 33 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 2015-04-15T03:25:09.6002 36.3138 -97 .5153 20km W of Perry, Oklahoma 6.438 3 ml 2015-04-13T14:10:06.1002 36.5068 -99.0534 15km ENE of Mooreland, Oklahoma 9.177 3.5 ml 2015-04-13T12:38:59.7002 36.077 -97.5578 14km NNE of Crescent, Oklahoma 5.06 3.3 ml 2015-04-12T22:55:56.1002 35.949 -96 .775 4km S of Cushing, Oklahoma 4.45 3.5 ml 2015-04-12T12: 10:35.5002 36.7214 -97 .9331 20km WSW of Medford, Oklahoma 6.885 3.2 ml 2015-04-12T08:18:36.3002 35.8083 -97.4164 7km S of Guthrie, Oklahoma 5.262 3 ml 2015-04-12T00:42:03.3002 36.1195 -97.5644 18km N of Crescent, Oklahoma 5.518 3.4 ml 2015-04-11T18:58:39.6002 36.511 -99.0309 17km ENE of Mooreland, Oklahoma 7.231 3.1 ml 2015-04-1OT10:07:32.6002 35.811 -97.234 14km S of Langston, Oklahoma 5.75 3.2 ml 2015-04-09T18:40:31.7002 36.1254 -97.5508 19km NNE of Crescent, Oklahoma 5 3 ml 2015-04-09T09:29:39.9002 35.6249 -97.2047 4km SSW of Luther, Oklahoma 5.393 3.2 ml 2015-04-09T03:38:08.5002 36.7222 -97.8312 12km SW of Medford, Oklahoma 5.95 3 ml 2015-04-08T20:52:00.5002 35.8192 -97.4191 6km S of Guthrie, Oklahoma 2.487 4 mwr 2015-04-08T20:47:35.1002 35.8219 -97.424 6km S of Guthrie, Oklahoma 4.722 3.1 ml 2015-04-08T03: 15:48.1002 36.266 -97.2674 3km SE of Perry, Oklahoma 4.852 3 ml 2015-04-08T01 :47:51 .8002 36.1867 -97.0295 8km NNE of Stillwater, Oklahoma 4.65 3.2 ml 2015-04-08T01 :42: 11.9002 36.2826 -97.5171 20km W of Perry, Oklahoma 2.723 3 ml 2015-04-07T22: 10: 14.2002 36.5024 -97.1509 22km SSW of McCord, Oklahoma 6.822 3 ml 2015-04-07T21 :21 :24.2002 36.8895 -98.1974 20km NE of Cherokee, Oklahoma 4.651 3.3 ml 2015-04-07T17 :25: 12.0002 36.3306 -97.525 21 km WNW of Perry, Oklahoma 6.866 3.5 mwr 2015-04-07T03:52 : 17.1002 36.3699 -97.8308 5km SE of Enid, Oklahoma 5.734 3.1 ml 2015-04-06T15:37:00.9002 36.6331 -97 .6504 20km SSE of Medford, Oklahoma 6.364 3.1 ml 2015-04-06T15:30:23.6002 36.6338 -97 .6574 20km SSE of Medford, Oklahoma 5.226 3.9 mwr 2015-04-06T09:01 :41.9002 36.5112 -99 .0454 16km ENE of Mooreland, Oklahoma 8.848 3.2 ml 2015-04-06T01 :33:45.5502 37 .0546 -98 .0244 10km S of Anthony, Kansas 7.41 3 mb lg 2015-04-05T10:22:21.8002 36.4674 -97.322 19km N of Perry, Oklahoma 7.305 3.2 ml 2015-04-05T04:49: 13.5002 36.5043 -97.1452 21 km SSW of McCord, Oklahoma 6.907 3.1 ml 2015-04-04T16: 15:59.4002 35.9529 -96.7804 3km SSW of Cushing, Oklahoma 4.48 3 ml 2015-04-04T13:21 :17.0002 36.1176 -97.5717 18km N of Crescent, Oklahoma 5.047 4.1 mwr 2015-04-04T09: 11 :54.2002 36.3284 -97.5268 21 km WNW of Perry, Oklahoma 6.828 3 ml 2015-04-04T08:35:30.0002 36.3308 -97.5282 22km WNW of Perry, Oklahoma 6.088 3.4 mwr 2015-04-04T05:02:35.7002 36.1166 -97 .5719 18km N of Crescent, Oklahoma 5 3.3 mwr 2015-04-04T04 :10:30.1002 36.5113 -99.0518 15km ENE of Mooreland, Oklahoma 9.772 3.2 ml 2015-04-04T00:49:59.2002 36.1163 -97.5638 18km N of Crescent, Oklahoma 5.268 3.7 mwr 2015-04-04T00:48:01 .8002 36.9384 -97.634 10km SSW of Caldwell, Kansas 4.713 3 ml 2015-04-04T00:20:01 .6002 36 .9402 -97.6337 10km SSW of Caldwell, Kansas 5.394 3.4 ml 2015-04-03T21 :28:36.8002 36 .6888 -97 .6795 13km SSE of Medford, Oklahoma 5.977 3.4 ml 2015-04-03T20:54:00.8002 36.4872 -98.1516 12km ESE of Helena, Oklahoma 6.912 3.3 ml 2015-04-03T02: 16:49.6002 36.4876 -98.1637 11 km SE of Helena, Oklahoma 5.599 3.2 mwr 2015-04-02T03:58: 11 .0002 36.1186 -97.5638 18km N of Crescent, Oklahoma 5.428 3.4 ml 2015-04-02T03:05: 17.7002 36.1193 -97.5614 18km N of Crescent, Oklahoma 4.842 3.3 ml 2015-04-02T02: 10:47.9002 36.7753 -98.0307 26km W of Medford, Oklahoma 5.301 3.5 ml 2015-04-02T00:46: 14.2002 36.5989 -97 .605 25km SSE of Medford, Oklahoma 5.824 3.1 ml 2015-04-01T23:03: 14.6002 36.5967 -97.6077 25km SSE of Medford, Oklahoma 6.13 3.1 ml 2015-04-01T19:19:31.7002 36.122 -97.5648 18km N of Crescent, Oklahoma 5.459 3.2 ml 2015-03-31T16:23:07.0002 36.921 -97.7934 13km NNW of Medford, Oklahoma 2.634 3 ml 2015-03-31T15:21 :07.6002 36.6028 -97 .6158 24km SSE of Medford, Oklahoma 2.713 3.4 ml 2015-03-31T14:46:54.9002 36.3262 -97.5257 21 km W of Perry, Oklahoma 2.554 3 ml 2015-03-31 T03:42:40.4002 36.784 -98 .0176 25km W of Medford, Oklahoma 6.37 3 ml 2015-03-30T14: 17:34.2002 36.3569 -97.0974 18km ENE of Perry, Oklahoma 5 3 ml 2015-03-30T06:06: 15.2002 36.112 -97 .232 15km W of Stillwater, Oklahoma 5.147 3 ml 2015-03-30T05:57:32.0002 36.1145 -97 .2318 15km W of Stillwater, Oklahoma 5.499 3.1 ml 2015-03-29T05:06:01.1002 35.8139 -97.4515 7km SSW of Guthrie, Oklahoma 6.7 3 ml 2015-03-28T11 :23:09.0002 36.506 -99 .025 17km ENE of Mooreland, Oklahoma 7.081 3.1 ml 2015-03-28T11 :08:53.7002 36.5153 -99 .0166 18km ENE of Mooreland, Oklahoma 8.74 3.4 ml 2015-03-28T10: 12:06.4002 36.8513 -97.6991 5km NNE of Medford, Oklahoma 6.477 3.1 ml 2015-03-27T20:20:33.6802 37.0406 -97.9129 16km SE of Anthony, Kansas 7.48 3.1 mb lg 2015-03-27T16:39:03.7002 36.1138 -97 .2342 15km W of Stillwater, Oklahoma 4.778 3.3 ml Facility Decommissioning Plan - Rev 2 February 2021 Page 34 of 56

Preparer: D. Horne; Date: 02/15/21 Table 2 Revision 2 Reviewer: E. Du lle; 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 2015-03-27T10:32: 16.1 00Z 36.194 -97 .0065 9km NNE of Stillwater, Oklahoma 5.212 3 ml 2015-03-26T22: 16: 18.1 00Z 36.776 -98 .0271 26km W of Medford, Oklahoma 6.514 3.2 ml 2015-03-25T17:33:58.7002 35.65 -97 .3673 10km E of Edmond, Oklahoma 5.181 3.2 ml 2015-03-25T08:54:47.800Z 36.1171 -97 .3021 19km S of Perry, Oklahoma 5 3.1 ml 2015-03-25T03: 15: 16.800Z 36.2715 -97 .3781 8km WSW of Perry, Oklahoma 5.567 3.5 ml 2015-03-25TO0: 15:26.9002 36.5999 -97 .6278 24km SSE of Medford , Oklahoma 5.234 3.4 mwr 2015-03-25T00:10:57.300Z 36.7746 -98.0299 26km W of Medford, Oklahoma 6.728 3.2 ml 2015-03-24T23:53:17.700Z 36.4455 -97.7278 14km ENE of Enid, Oklahoma 4.545 3.2 ml 2015-03-24T23:45:59.400Z 36.4449 -97.7286 14km ENE of Enid, Oklahoma 4.766 3 ml 2015-03-24T20:25:04.900Z 36.3309 -97.5195 21 km WNW of Perry, Oklahoma 6.795 3.5 mb lg 2015-03-24T19:48:28.9002 36.7776 -98.0301 26km W of Medford, Oklahoma 6.513 4 ml 2015-03-24T15:35:55.6202 37.0868 -97.6332 6km NNW of Caldwell, Kansas 5 3.2 mb lg 2015-03-24T15:31 :51.490Z 37.105 -97.6504 8km NNW of Caldwell, Kansas 5.89 3.7 mwr 2015-03-24T14:31 :36.300Z 36.5423 -98.3807 9km W of Helena, Oklahoma 5 3.1 ml 2015-03-24T13:54:43. 700Z 36.0784 -97 .2242 15km WSW of Stillwater, Oklahoma 5.269 3.2 ml 2015-03-24T10:07: 14. 700Z 36 .5177 -99.0043 19km ENE of Mooreland, Oklahoma 7.408 3.3 ml 2015-03-24T09:45:37.000Z 36 .5166 -98.9862 21 km ENE of Mooreland, Oklahoma 5 3 ml 2015-03-24T09:39:13.700Z 36.5175 -98.9563 23km ENE of Mooreland, Oklahoma 0.416 3.5 ml 2015-03-24T00:27:27.900Z 36.3561 -97.1119 17km ENE of Perry, Oklahoma 0.835 3.7 mwr 2015-03-23T23:29:54.500Z 36.6336 -97 .6539 20km SSE of Medford, Oklahoma 2.588 3.9 mwr 2015-03-23T21 :41 :29.000Z 36.7829 -98.0248 26km W of Medford, Oklahoma 7.012 3 ml 2015-03-23T20:16: 15.300Z 36.1222 -97.5663 18km N of Crescent, Oklahoma 4.214 3.6 mwr 2015-03-23T17:17:30.6002 35.7913 -96.9873 13km NW of Chandler, Oklahoma 5.275 3.6 mwr 2015-03-23T16:23:42.5002 36.782 -98.0207 25km W of Medford, Oklahoma 5.76 3.3 ml 2015-03-23T16:18: 19.400Z 36.7831 -98.0238 26km W of Medford, Oklahoma 6.811 3.3 ml 2015-03-23T07:24:26. 700Z 36.782 -98 .0303 26km W of Medford, Oklahoma 6.601 3.6 ml 2015-03-22T22:45:22.900Z 36.3321 -97 .5171 21 km WNW of Perry, Oklahoma 6.626 3.4 ml 2015-03-22T11 :12:09.9002 36.3321 -97 .1971 9km ENE of Perry, Oklahoma 5 3.3 ml 2015-03-21T19:58:36 .000Z 36.2596 -97.2549 4km SE of Perry, Oklahoma 4.677 3.4 mwr 2015-03-21T19:57:37.000Z 36 .2578 -97.2504 4km SE of Perry, Oklahoma 4.976 3 ml 2015-03-21T10:58:45.6002 36.6065 -98.3812 11 km NW of Helena, Oklahoma 5.97 3.2 ml 2015-03-21T10:08:51.6002 36.3506 -97 .0884 19km ENE of Perry, Oklahoma 5 3.6 mwr 2015-03-20T09:00:40.300Z 36.58 -97.597 27km WSW of Tonkawa, Oklahoma 5.656 3.2 ml 2015-03-19T14:48:32 .100Z 36.6029 -97 .6077 25km SSE of Medford, Oklahoma 6.114 3.1 ml 2015-03-18T18: 13:34.5002 36.7794 -98 .0299 26km W of Medford, Oklahoma 6.489 3 ml 2015-03-17T23:45:32.500Z 36.5995 -97 .6222 25km SSE of Medford, Oklahoma 2.381 3.9 mwr 2015-03-17T05:50: 10.300Z 37.0062 -97.8195 19km W of Caldwell, Kansas 5 3.2 mb lg 2015-03-17T00:03:59.400Z 36.36 -97.1017 18km ENE of Perry, Oklahoma 4.799 3.1 ml 2015-03-16T22:46:09.300Z 35.8094 -97.2352 15km S of Langston, Oklahoma 7.112 3.4 ml 2015-03-16T15:28:46.9002 35.812 -97.2366 14km S of Langston, Oklahoma 5.73 3 ml 2015-03-16T14: 15:51 .5002 35.8121 -97.2395 14km S of Langston, Oklahoma 4.3 3 ml 2015-03-16T13:19:00.7002 35.8053 -97.233 15km S of Langston, Oklahoma 6.955 3.2 ml 2015-03-16T05:48:27.11 OZ 37.2107 -97 .8802 14km ENE of Anthony, Kansas 8.63 3.5 mb lg 2015-03-15T05: 10:04.200Z 36.2641 -97 .2792 2km SSE of Perry, Oklahoma 5.422 3.1 ml 2015-03-14T13:57:47 .000Z 36.7445 -97.6287 11 km SE of Medford , Oklahoma 5 3.1 ml 2015-03-13T10:04:26.5002 36 .9396 -97.635 10km SSW of Caldwell, Kansas 2.3 3.3 ml 2015-03-13T07:38:53.700Z 35.7455 -97 .3819 13km NE of Edmond, Oklahoma 6.194 3.1 ml 2015-03-13T06:49:04.200Z 35.744 -97 .3777 13km NE of Edmond, Oklahoma 5 3 ml 2015-03-12T20:34:02.100Z 36.6284 -97 .6667 20km SSE of Medford, Oklahoma 5.274 3.9 mwr 2015-03-12T10:40:26.1 00Z 36.8699 -98.1167 24km ENE of Cherokee, Oklahoma 5 3.1 ml 2015-03-11T14:44:42.800Z 36.1157 -97 .3075 19km S of Perry, Oklahoma 4.852 3.3 ml 2015-03-1 0T20:28:41.300Z 36.2651 -97.2761 2km SSE of Perry, Oklahoma 5.405 3 ml 2015-03-1 0T04:21 :04.500Z 36.7514 -97.5342 18km ESE of Medford, Oklahoma 6.58 3.3 mwr 2015-03-09T22:28:21 .000Z 35.541 -97.2425 4km SE of Jones, Oklahoma 6.048 3 ml 2015-03-09T10:48:57.000Z 35.8206 -97.4384 6km S of Guthrie, Oklahoma 4.897 3.1 mwr 2015-03-09T04:01 :23.000Z 35.8144 -97.4511 7km SSW of Guthrie, Oklahoma 5 3.2 ml 2015-03-09T03:24:40.400Z 35.815 -97.4481 7km SSW of Guthrie, Oklahoma 4.525 3.7 mwr 2015-03-08T22: 14:48.5002 36.2692 -97.2888 2km S of Perry, Oklahoma 5.586 3.3 ml Facility Decommissioning Plan - Rev 2 February 2021 Page 35 of 56

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