March 1, 2019

List of Plants Where -Ash Contaminated Groundwater Exceeds Allowable State and/or Federal Limits

This table lists 88 plants in 25 states whose owners have posted notifications that the groundwater exceeds state and/or federal limits of contamination, without an alternate source demonstration, for one or more of the following toxic substances: Antimony, Arsenic, Barium, Beryllium, Cadmium, Chromium, Cobalt, Lead, Lithium, Molybdenum, Selenium, Thallium, and Radium 226 and 228 combined.

In addition, if the unit is a coal ash pond, the table indicates whether the ash pond is lined and whether the pond violates the federal aquifer separation standard, which requires five feet of separation from the base of the pond to the underlying groundwater. Owners/operators may attempt to show that an alternative source is responsible for the contamination.

Assessments of Corrective Measures must be initiated within 90 days of contamination notifications and must be completed within 90 to 150 days of initiation, and publicly posted 30 days after completion. Cleanup plans (“Assessment of Corrective Measures”) are required at all plants if the owners do not demonstrate that a source other than the regulated coal ash dumps caused the contamination.

Aquifer Alternate Corrective Contamination Found Presence Owner/ Separation Source Measures Name of Plant City State Above Federal and/or or Absence Operator Standard Determination Assessment State Groundwater Limits of Liner Compliance Report 1 Healy Power Plant Golden Valley Healy AK Antimony, arsenic, Unlined Non- Initiation Electric lithium, molybdenum, compliance 6/18/2018 Association and selenium *Report dated 8/18

2 E.C. Gaston Steam Alabama Power Wilsonville AL Arsenic, lithium, Unlined / Non- Plant molybdenum, radium Lined compliance 226 and radium 228

3 James H. Miller, Jr., Alabama Power Quinton AL Arsenic, cobalt, lithium Unlined Non- Electric Generating compliance Plant

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4 James M. Barry Alabama Power Bucks AL Arsenic, cobalt Unlined Non- Electric Generating compliance

Plant

5 Plant Greene Alabama Power Demopolis AL Arsenic, lithium Unlined Non- County compliance

6 William C. Gorgas Alabama Power Parrish AL Arsenic, lithium, Unlined Non- Electric Generating molybdenum compliance

Plant

7 Cholla Power Plant Arizona Public Joseph City AZ Arsenic, cobalt, fluoride, Unlined Non- Service Electric lithium, molybdenum compliance Company

8 Rawhide Energy Platte River Wellington CO Selenium, cobalt Unlined Non- Station Power compliance Authority for impoundme nts

9 Valmont Station Xcel Energy Boulder CO Cobalt, molybdenum, Unknown N/A Initiation lithium, selenium (landfill) 1/31/2019

10 C.D. McIntosh Lakeland Lakeland FL Radium 226 and radium Unknown N/A Initiation Power Plant Electric 228, arsenic, lithium (landfill) 2/12/2019

11 Crystal River Energy Duke Energy Crystal FL Arsenic, lithium, Unknown N/A Initiation Complex River molybdenum, radium (landfill) 1/14/2019 226 and radium 228

12 Deerhaven Gainesville Gainesville FL Lithium, molybdenum Unknown N/A Generating Regional (landfill) Station Utilities

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13 Plant Crist Gulf Power Pensacola FL Cobalt, radium 226 and N/A / Non- Yes, partial Initiation radium 228, Lined compliance 1/2019 molybdenum, mercury

14 Plant Smith Gulf Power Southport FL Arsenic, lithium, radium Unlined Non- Yes, partial Initiation 226 and radium 228 compliance 1/2019

15 St. John’s River Jacksonville Jacksonvill FL Radium 226 and radium Unknown N/A Initiation Power Park Electric e 228 (landfill) 1/13/2019 Authority

16 Power Cartersville GA Cobalt, (molybdenum) Unlined Non- Company compliance

17 Plant Hammond Rome GA Arsenic, cobalt, Unlined Non- Company molybdenum compliance

18 Plant McIntosh Georgia Power Rincon GA Cobalt, (lithium) Unlined Non- Company compliance

19 Georgia Power Juliette GA Cobalt Unlined Non- Company compliance

20 Plant Wansley Georgia Power Roopville GA Lithium Unlined Non- Company compliance

21 Plant Yates Georgia Power Newman GA Beryllium Unknown N/A Company (landfill)

22 Neal South Energy MidAmerican Salix IA Arsenic Unknown N/A Initiation

Center Energy Co. (landfill) 1/28/2019

23 Dallman Power City Water, Springfield IL Arsenic Unlined Non- Generating Station Light and compliance (and Lakeside Power Station)

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24 Joliet #9 Generating NRG Joliet IL Arsenic, lithium, Unlined Non- Station (Lincoln molybdenum compliance

Stone Quarry)

25 Powerton NRG Pekin IL Arsenic, barium, Unlined Compliance Generating Station selenium, thallium, molybdenum

26 Bailly Generating Northern Wheatfield IN Arsenic, cadmium Unlined Non- Initiation Station Indiana Public lithium, thallium compliance 12/6/2018 Service Company

27 Cayuga Generating Duke Energy Cayuga IN Arsenic, cadmium, Unlined Non- Initiation

Station chromium, cobalt, lead, compliance 1/14/2019 lithium, selenium, thallium, radium 226 and radium 228, molybdenum

28 Gallagher Duke Energy New IN Arsenic, molybdenum Unlined Non- Initiation Generating Station Albany compliance 1/14/2019

29 Gibson Generating Duke Energy Owensville IN Arsenic, cobalt, lithium, Unlined Non- Initiation Station molybdenum compliance 1/14/2019

30 R.M. Schahfer Northern Wheatfield IN Cobalt, lithium, Unlined Non- Initiation Generating Station Indiana Public molybdenum compliance (partial) Service 11/21/2018 Company

31 Wabash River Duke Energy Terre IN Chromium, radium 226 Unlined Non- Generating Station Haute and radium 228, arsenic, compliance cobalt, lead, lithium, molybdenum

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Big Sandy Plant Big Sandy Plant Louisa KY Beryllium, cobalt, Unlined Non- Yes N/A lithium compliance

32 D.B. Wilson Big Rivers Centertow KY Cobalt Unlined Non- Initiation Generating Station Electric n compliance 1/14/2019 Corporation

33 E.W. Brown Kentucky Harrodsbur KY Lithium, molybdenum Unlined Compliance Initiation Generating Station Utilities g 2/26/2019 Company

34 East Bend Electric Duke Energy Union KY Lithium Unknown N/A Initiation

Plant (landfill) 1/14/2019

35 Elmer Smith Station Owensboro Owensboro KY Molybdenum Unlined Compliance Municipal Utilities

36 Ghent Generating Kentucky Ghent KY Lithium, molybdenum Unlined Non- Initiation

Station Utilities compliance 2/26/2019 Company

37 Mill Creek Louisville Gas & Louisville KY Molybdenum, lithium Unlined Non- Initiation Generating Station Electric compliance 2/26/2019 Company

38 Sebree Generating Big Rivers Robards KY Lithium Unlined Non- Initiation Station Electric compliance 1/14/2019 Corporation

39 Trimble County Louisville Gas & Bedford KY Arsenic, lithium, Unlined / Non- Initiation

Generating Station Electric molybdenum, selenium Lined compliance 2/26/2019 Company

40 BC Cobb Power Consumers Muskegon MI Lithium, (others) Unlined Non- Plant Energy Co. compliance

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41 DE Karn Power Consumers Essexville MI Arsenic, (others) Unlined Non- Plant Energy Co. compliance

42 JB Sims Power Consumers Grand MI Cobalt, fluoride, lithium Unlined Non- Generation Plant Energy Co. Haven compliance

43 JC Weadock Power Consumers Essexville MI Arsenic, beryllium, Unlined Non- Plant Energy Co. lithium, (others) compliance

44 JH Campbell Power Consumers West Olive MI Arsenic, (others) Unlined Non- Plant Energy Co. compliance

45 River Rouge Power DTE Electric Co. River MI Arsenic, lithium Unlined Non- Plant Rouge compliance

John Twitty Energy City Utilities of Springfield MO Antimony Unknown N/A Yes N/A Center Springfield (landfill)

46 Labadie Energy Ameren Labadie MO Molybdenum Unlined Non-

Center compliance

47 Meramec Energy Ameren St. Louis MO Arsenic, molybdenum Unlined Non-

Center compliance

48 Rush Island Energy Ameren Festus MO Arsenic, molybdenum Unlined Non-

Center compliance

49 Sioux Energy Center Ameren West Alton MO Molybdenum Unlined Non- compliance

50 Red Hills Power Choctaw Ackerman MS Cobalt, lithium Unknown N/A Initiation Plant Generation (landfill) 1/30/2019 Limited Partnership, LLLP

51 Plant Victor Daniel Mississippi Escatawpa MS Lithium Unlined Non- Power compliance

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52 Colstrip Steam Talen Energy Colstrip MT Cobalt, lithium, Unlined Non-

Electric Station molybdenum compliance

53 Allen Steam Station Duke Energy Belmont NC Arsenic, beryllium, Unlined Non- Initiation cadmium, cobalt, compliance 1/14/2019 lithium, thallium

54 Asheville Steam Duke Energy Arden NC Cobalt, radium 226 and Unlined Non- Initiation

Electric Plant radium 228 compliance 1/14/2019

55 Belews Creek Steam Duke Energy Belews NC Arsenic, beryllium, Unlined Non- Initiation

Station Creek cobalt, lithium, radium compliance 1/14/2019 226 and radium 228, chromium

56 Buck Steam Station Duke Energy Salisbury NC Cobalt, lithium Unlined Non- Initiation compliance 1/14/2019

57 Cliffside Steam Duke Energy Cliffside NC Arsenic, cobalt, lithium, Unlined Non- Initiation

Station beryllium, radium 226 compliance 1/14/2019 and radium 228

58 Dan River Duke Energy Eden NC Arsenic, lithium Unlined Non- Initiation compliance 1/14/2019

59 H.F. Lee Energy Duke Energy Goldsboro NC Arsenic, cobalt, lithium Unlined Non- Initiation

Complex compliance 1/14/2019

60 L.V. Sutton Energy Duke Energy Wilmingto NC Arsenic, cobalt, lithium, Unlined Non- Initiation

Complex n molybdenum compliance 1/14/2019

61 Marshall Steam Duke Energy Terrell NC Arsenic, beryllium, Unlined Non- Initiation

Station cobalt, lithium, thallium, compliance 1/14/2019 radium 226 and radium 228

62 Roxboro Steam Duke Energy Semora NC Arsenic cobalt, lithium, Unlined Non- Initiation

Electric Plant molybdenum, selenium compliance 1/14/2019

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63 W.H. Duke Energy Robeson NC Arsenic, radium 226 and Unlined Non- Initiation Weatherspoon County radium 228 compliance 1/14/2019

Power Plant

64 Four Corners Power Arizona Public Fruitland NM Cobalt, fluoride, Unlined Non- Plant Service Co. molybdenum compliance

65 Conesville Plant American Coshocton OH Arsenic, lithium, Unlined Non- Electric Power molybdenum compliance

66 Northeastern 3&4 American Oologah OK Lithium Unlined Non- Power Station Electric Power compliance

67 Bruce Mansfield FirstEnergy Shippingpo PA Two contaminants Unlined Non- Initiation Plant (Little Blue rt (unnamed) compliance 1/14/2019 Run Disposal Facility)

68 Brunner Island Talen Energy York Haven PA Arsenic, lithium, Unlined Non- molybdenum compliance

69 Montour Talen Energy Washingto PA Cobalt, lithium Unlined Non- nville compliance

70 Cross Generating Santee Cooper Cross SC Cobalt Unknown N/A Station (landfill)

71 H.B. Robinson Duke Energy Hartsville SC Arsenic, lithium, radium Unlined Non- Initiation

Steam Electric Plant 226 and radium 228 compliance 1/14/2019

72 W.S. Lee Steam Duke Energy Williamsto SC Antimony, beryllium, Unlined Non- Initiation

Station n cobalt, lithium compliance 1/14/2019

73 Wateree South Carolina Eastover SC Arsenic, lithium Unlined Non- Generating Station Electric & Gas Compliance

74 H.W. Pirkey Power American Hallsville TX Cadmium, cobalt, Unlined Compliance Yes, partial Plant Electric Power lithium, mercury

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J. Robert Welsh American Pittsburg TX Lithium Unlined Compliance Yes N/A Power Plant Electric Power

75 Hunter Power Plant PacifiCorp Castle Dale UT Cobalt, lithium, Unknown N/A molybdenum (landfill)

76 Huntington Power PacifiCorp Huntington UT Chromium, Cobalt, Unknown N/A Plant lithium, molybdenum, (landfill) selenium

77 Intermountain Intermountain Delta UT Arsenic, chromium, Unlined Non- Initiation Generating Facility Power Service cobalt, lithium, compliance 10/15/2018 Corp molybdenum *Report 1/9/2019

78 Bremo Power Dominion Bremo VA Lithium Unlined Non- Initiation

Station Energy Bluff compliance 12/5/2018

79 Chesterfield Power Dominion Chester VA Arsenic, cobalt, lithium, Unlined Non- Initiation

Station Energy radium 226 and radium compliance (partial) 228, (molybdenum), 12/18/2018 (lead)

80 Clover Power Dominion Clover VA (Cobalt) Unlined Compliance

Station Energy

81 Possum Point Dominion Dumfries VA (Cobalt), (lithium) Unlined Non-

Power Station Energy compliance

82 Virginia City Hybrid Dominion St. Paul VA Lithium Unknown N/A

Energy Center Energy (landfill)

83 Yorktown Power Dominion Yorktown VA (Cobalt) Unknown N/A

Station Energy (landfill)

84 Mount Storm Power Dominion Mount WV Fluoride, molybdenum Unlined Compliance

Station Energy Storm

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85 Mountaineer Plant American Letart WV Lithium Unlined Compliance Electric Power

86 Dave Johnston PacifiCorp Glen Rock WY Arsenic, cadmium, Unlined Compliance

Power Plant molybdenum, radium 226 and radium 228

87 Jim Bridger Power PacifiCorp Point of WY Arsenic, cadmium, Unlined N/A

Plant Rocks cobalt, fluoride, lead, lithium, molybdenum, radium 226 and radium 228, selenium

88 Naughton Power PacifiCorp Kemmerer WY Cobalt, lithium, Unlined N/A &

Plant molybdenum, radium Compliance 226 and radium 228, selenium

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