67 proven and potential cases displayed in this spreadsheet

Only the 63 coal ash cases are summarized beginning in row 78 The 4 oil ash cases are at the bottom of the sheet

Site Name # Category Media State Utility Landowner ThirdParty? Offsite Site Size (acres) Coal

Ash FGD Solids FSS Other (list) Type Former Mine / Quarry? Liner Liner

Type LCS Sat. Ash? Year Opened Year

Closed On

NPL? Facility Closed Monitoring

Continues

Salem Acres Site (Massachusetts Electric Company) 1 I GW MA Mass. Electric Non-utility No informatio n Yes 0.6 CCW no no sewage sludge, tannery wastes, MSW LF No no n/a No informatio n 1952 1969 Yes Yes No

City of Beverly/Vitale Brothers Fly Ash Pit (New

England Electric) 2 I GW MA New England Electric Non-utility Yes Yes 18 CCW no no appliances, scrapped autos LF Sand and Gravel no n/a Yes 1950 1975 No No No information

Don Frame Trucking, Inc. Fly Ash Landfill (Niagara Mohaw k) 3 I GW NY Niagare Mohawk Non-utility No informatio n Yes no information CCW no no other materials including yard sweepings LF No informati on No

informati on No

informati on No

informatio n No

informatio n No

informati on No No Reportedly

Virginia Electric Power Co. (VEPCO) Possum Point 4 I GW VA Dominion Dominion No No 40 RCC no no Oil Ash IMP No no n/a no No informatio n No

informati on No Yes No information

PEPCO Morgantown Generating Station Faulkner Off-site Disposal Facility 5 I GW MD Mirant Mirant No No 181 RCC no no no LF No informati on Partial No

informati on Partial No

informatio n 1970 Active No No Yes

Virginia Power Yorktown Power Station Chisman Creek Disposal Site 6 I GW VA Dominion Dominion No informatio n Yes 27 CCW no no Pet Coke LF Sand and Gravel no n/a No informatio n 1957 1974 Yes No Yes

Hyco Lake, Roxboro 7 I SW NC Progress Energy Progress

Energy No No 3750 CCW no no no IMP No no n/a no 1964 Active No Yes No information Georgia Power Company, Plant Bowen, Cartersville, GA 8 I SW GA Southern Southern No No 245 CCW no no no IMP No no n/a no 1968 Active No No NoDepartment of Energy - Oak Ridge Y12 Plant Chestnut Ridge Operable Unit 2 DOE Oak Ridge Reservation, Oak Ridge, Tennessee 9 I SW TN DOE DOE No No 8.5 CCW no no no IMP No no n/a no 1955 1967 Yes No Yes

South Carolina Electric & Gas Canadys Plant, South Carolina 10 I GW SC SCANA SCANA No No 175 CCW no no no IMP No no n/a no 1974 Active No Yes Yes

Belew s Lake, North Carolina 11 I SW NC Duke Energy Duke Energy No No 3863 CCW no no no IMP No no n/a no 1973 Active No No No information

U.S. Department of Energy Savannah River Project, South Carolina 12 I SW SC DOE DOE No No no information CCW no no no IMP No no n/a no 1952 No informati on Yes No No information

EPA-HQ-RCRA-2009-0640-DRAFT-0346.xls - 67 Cases Page 1 of 27 Natural Resource Technology, Inc.67 proven and potential cases displayed in this spreadsheet

Only the 63 coal ash cases are summarized beginning in row 78 The 4 oil ash cases are at the bottom of the sheet

Site Name # Category Media State Utility Landowner ThirdParty? Offsite Site Size (acres) Coal

Ash FGD Solids FSS Other (list) Type Former Mine / Quarry? Liner Liner

Type LCS Sat. Ash? Year Opened Year

Closed On

NPL? Facility Closed Monitoring

Continues
Dairy Power Cooperative E.J. Stoneman Generating Station Ash Disposal Pond, W isconsin 13 I GW WI Dairyland Dairyland No No 22 CCW no no no IMP No no n/a Yes 1950 1987 No No Yes

WE PCO Highway 59 Landfill, Wi sconsin 14 I GW WI We Energies We Energies No Yes 23 CCW no no no LF Sand and Gravel no n/a Yes 1969 1979 No No Yes

Alliant (Formerly W isconsin Power & Light) Nelson Dewey Ash Disposal Facility, W isconsin 15 I GW WI Alliant Alliant No No 24 CCW no no no IMP No no n/a Yes 1958 2001 No No Yes

WE PCO Cedar-Sauk Landfill, Wi sconsin 16 I GW WI We Energies We Energies No Yes 28 CCW no no no LF Sand and Gravel no n/a No 1969 1979 No No Yes

Wi sconsin Electric Power Co. (W EPCO) Port W ashington Facility, Wi sconsin (Druecker) 17 I GW WI We Energies We Energies Yes Yes 15 CCW no no no LF Rock no n/a Yes 1948 1971 No No Yes Lansing Board of W ater & Light (LBW L) North Lansing Landfill, Michigan 18 I GW MI LBW L LBW L No Yes 27 CCW no no no LF Sand and Gravel no n/a Yes 1980 1997 No No Yes

Northern Indiana Public Service Corp. (NIPSCO) Yard 520 Landfill Site (Brown's Landfill) Tow nship of Pines, Porter County, IN 19 I GW IN Nisource Nisource No informatio n Yes 45 CCW no no no LF No Partial Clay no 1965 2001 No No Yes

Brandy Branch Reservoir, Texas 20 I SW TX AEP AEP No No 1257 no no no no IMP No no n/a No 1983 Active No No No information

Southwestern Electric Power Company W elsh Reservoir, Texas 21 I SW TX AEP AEP No No 1465 CCW no no no IMP No no n/a No 1976 Active No No No information Texas Utilities Electric Martin Creek Reservoir, Texas 22 I SW TX TXU TXU No No 5020 CCW no no no IMP No no n/a No 1974 Active No No No information

Basin Electric Power Cooperative W. J. Neal Station Surface Impoundment, North Dakota 23 I GW ND Basin Electric Power Coop. Basin Electric

Power Coop. No No 44 CCW no no no IMP No no n/a no 1955 1988 No Yes No
Cooperative Power Association/United Power Coal Creek Station Surface Impoundments, North Dakota 24 I GW ND Great River Energy Great River

Energy No No 220 no Yes no Mill rejects, small amounts of bottom ash. IMP No Retrofit Composi te no 1978 Active No No Yes

K.R. Rezendes South Main Street Ash Landfill, Freetown, Massachusetts 25 II GW MA PG&E Non-utility No informatio n Yes 31.5 CCW no no no LF Sand and Gravel no n/a no 1975 2001 No No No information
oil ash site, see below AES Creative Resources W eber Ash Disposal Site, New

York 27 II GW NY AES AES No Yes 12.1 CCW no no no LF No Yes PVC Yes no 1978 2001 No No Yes Central Hudson Gas and Electric Corporation Danskammer W aste Management Facility, New York 28 II GW NY Dynegy Dynegy No No no information CCW no no no LF No informati on No

informati on No

informati on No

informatio n No

informatio n No

informati on No No

informati on No information

EPA-HQ-RCRA-2009-0640-DRAFT-0346.xls - 67 Cases Page 2 of 27 Natural Resource Technology, Inc.67 proven and potential cases displayed in this spreadsheet

Only the 63 coal ash cases are summarized beginning in row 78 The 4 oil ash cases are at the bottom of the sheet

Site Name # Category Media State Utility Landowner ThirdParty? Offsite Site Size (acres) Coal

Ash FGD Solids FSS Other (list) Type Former Mine / Quarry? Liner Liner

Type LCS Sat. Ash? Year Opened Year

Closed On

NPL? Facility Closed Monitoring

Continues C.R. Huntley Fly ash Landfill, New York 29 II GW NY NRG NRG No No no information CCW no no no LF No informati on No

informati on No

informati on No

informatio n No

informatio n No

informati on No No

informati on No information
Elrama Plant, Pennsylvania 30 II GW PA Reliant Reliant No Yes 22 CCW no Poz-OTec no LF Coal no n/a No 1979 No informati on No No

informati on No information Tennessee Valley Authority - Bull Run Steam Plant, Oak Ridge, Tennessee 31 II SW TN TVA TVA No No 49 RCC no no no IMP No no n/a No 1965 Active No No No
Tennessee Valley Authority W idow s Creek Fossil Fuel Plant, Alabama 32 II GW AL TVA TVA No No 310 CCW no no no IMP No no n/a No 1950 Active No No No

Tennessee Valley Authority Colbert Fossil Fuel Plant, Alabama 33 II GW AL TVA TVA No No See Notes CCW no no no IMP No Retrofit Clay no 1975 Active No No Yes

Duke Power Allen Steam Generating Plant, North Carolina 34 II GW NC Duke Energy Duke Energy No No 170 CCW no no no IMP No no n/a No 1973 Active No No Yes Cinergy East Bend Scrubber Sludge Landfill, Kentucky 35 II GW KY Duke Energy Duke Energy No No 213 no no Yes bottom ash and mill rejects IMP/LF No Partial n/a No 1981 Active No No Yes
Florida Power and Light Lansing Smith Plant, Florida 36 II GW FL Southern Southern No No 172 CCW no no no IMP No no n/a No 1965 Active No No No information oil ash site, see below oil ash site, see below oil ash site, see below Commonwealth Edison Powerton Plant - Mahoney Landfill, Pekin, Tazewell County, Illinois 40 II GW IL Midwest Generation Uncertain Yes Yes 40 CCW no no no LF Sand and Gravel Yes Poz-OPac Yes 1972 1982 No No informati on No information Xcel Energy/Southern Minnesota Municipal Power Agency - Sherburne County (Sherco) Generating Plant Becker, Minnesota 41 II GW MN Xcel Xcel No No 62 CCW Yes no no IMP No Yes Clay No 1976 No informati on No No

informati on No information

Alliant Rock River Ash Disposal Facility, W isconsin 42 II GW WI Alliant Alliant No No 17 CCW no no no LF No no n/a Yes 1954 2007 No No Yes Michigan City Site, Michigan City, Indiana 43 II GW IN Nisource Nisource No No no information CCW no no no IMP No informati on No

informati on No

informati on No

informatio n No

informatio n No

informati on No No

informati on No information
Bailly Generating Station, Indiana 44 II GW IN Nisource Nisource No No 14 CCW no no no IMP/LF No Retrofit HDPE no 1962 Active No No Yes Alliant Edgewater 1-4 Ash Disposal Site, W isconsin 45 II GW WI Alliant Alliant No No 17 CCW no no no LF No no n/a Yes 1969 1986 No No Yes Wi sconsin Power Supply Company (W PSC) Pulliam Ash Disposal Site, Wi sconsin 46 II GW WI Integrys Integris No No 80 CCW no no no LF No no n/a Yes 1971 1986 No No Yes Central Illinois Light Co. Duck Creek Station , Illinois 47 II GW IL Ameren Ameren No No 140 CCW no no no IMP No no n/a no No informatio n 2009 No No Yes

Illinois Power Company Hennepin Power Station Illinois 48 II GW IL Dynegy Midwest Generation Dynegy Midwest

Generation No No 68 CCW no no no IMP No no n/a No 1952 1996 No No Yes

Illinois Power Company Havanna Power Plant, Illinois 49 II GW IL Dynegy Midwest Generation Dynegy Midwest

Generation No No 30 CCW no no no IMP No no n/a No 1977 1994 No Yes No

EPA-HQ-RCRA-2009-0640-DRAFT-0346.xls - 67 Cases Page 3 of 27 Natural Resource Technology, Inc.67 proven and potential cases displayed in this spreadsheet

Only the 63 coal ash cases are summarized beginning in row 78 The 4 oil ash cases are at the bottom of the sheet

Site Name # Category Media State Utility Landowner ThirdParty? Offsite Site Size (acres) Coal

Ash FGD Solids FSS Other (list) Type Former Mine / Quarry? Liner Liner

Type LCS Sat. Ash? Year Opened Year

Closed On

NPL? Facility Closed Monitoring

Continues Dairyland Power Alma On-Site Fly Ash Landfill, W isconsin 50 II GW WI Dairyland Dairyland No No 56 CCW no no no LF No no n/a Yes 1947 1986 No No Yes Dairyland Power Alma Off-Site Fly Ash Landfill, W isconsin 51 II GW WI Dairyland Dairyland No Yes 29 CCW no no no LF No Yes Clay no 1983 2007 No No Yes

Illinois Power Vermillion Power Station, Illinois 52 II GW IL Dynegy Midwest Generation Dynegy Midwest

Generation No No 12 CCW no no no IMP No Yes See notes no 1989 Active No No Yes

Central Illinois Public Service Company Hutsonville Power Station, Illinois 53 II GW IL Ameren Ameren No No 22 CCW no no no IMP No no n/a Yes 1968 2000 No No Yes

Illinois Power Company W ood River Power Station, Illinois 54 II GW IL Dynegy Midwest Generation Dynegy Midwest

Generation No No 60 CCW no no no IMP No Partial See notes Partial no 1978 Active No No Yes

R.M. Schahfer Generating Station, IN 55 II GW IN Nisource Nisource No No 230 CCW no Yes no LF No Partial Composi te Partial no 1984 Active No No Yes

Coffeen/W hite & Brewer Trucking Fly Ash Landfill, Illinois 56 II GW IL Ameren Non-utility yes Yes 40 CCW no no no LF No no n/a Yes 1977 1997 No No Yes

Southern Indiana Gas and Electric Company (SIGECO) A.B. Brown Generating Station, Indiana 57 II GW IN Vectren Vectren No No 130 no yes no no LF No Partial Clay No informatio n 1979 No

informati on No No Yes

Cincinnati Gas & Electric Co. Miamiview

Landfill, Ohio 58 II GW OH Duke Energy Duke Energy No Yes 100 CCW no no no LF Sand and Gravel Yes Clay no 1983 1997 No Yes No Indiana Power & Light Petersburg Generating Station, Indiana 59 II GW IN AES/IPL AES/IPL No No 75 no no Poz-OTec no LF No no n/a no 1976 Active No No No information
Hoosier Energy Merom Generating Station Coal Combustion W aste Landfill, Indiana 60 II GW IN Hoosier Energy Hoosier Energy No No 190 CCW no Poz-OTec no LF No Partial Clay Yes 1982 Active No No Yes

Cinergy W .C. Beckjord Station, Ohio 61 II GW OH Duke Energy Duke Energy No No 34 CCW no no no IMP No no n/a no 1956 1985 No No Yes

Lemberger Landfill, W isconsin 62 II GW WI Manitowoc Pub. Utilities Non-utility No informatio n Yes 21 CCW no no MSW LF Sand and Gravel no n/a No informatio n 1940 1976 Yes No Yes

Conesville Fixed FGD Sludge Landfill, Ohio 63 II GW OH AEP AEP No No 50 no no Yes No LF No no n/a no 1976 1988 No Yes No Muscatine County Landfill, Iowa 64 II GW IA No information Non-utility No informatio n Yes no information CCW no no No information LF No informati on no n/a Yes 1964 1973 No No informati on No information

Dave Johnston Power Plant, Wyoming 65 II GW WY Pacificorp Pacificorp No No 50 CCW no no no LF No no n/a No No informatio n No

informati on No No

informati on No information

EPA-HQ-RCRA-2009-0640-DRAFT-0346.xls - 67 Cases Page 4 of 27 Natural Resource Technology, Inc.67 proven and potential cases displayed in this spreadsheet

Only the 63 coal ash cases are summarized beginning in row 78 The 4 oil ash cases are at the bottom of the sheet

Site Name # Category Media State Utility Landowner ThirdParty? Offsite Site Size (acres) Coal

Ash FGD Solids FSS Other (list) Type Former Mine / Quarry? Liner Liner

Type LCS Sat. Ash? Year Opened Year

Closed On

NPL? Facility Closed Monitoring

Continues

Montana-Dakota Utilities R.M. Heskett Station, North Dakota 66 II GW ND MDU Resources MDU Resources No No 15 CCW no no no LF No no n/a no 1954 1989 No No Yes

Arizona Public Service Co. Cholla Steam Electric Generating Station, Arizona 67 II GW AZ APS APS No No no information CCW no no no IMP No informati on No

informati on No

informati on No

informatio n No

informatio n No

informati on No No No information

EPA-HQ-RCRA-2009-0640-DRAFT-0346.xls - 67 Cases Page 5 of 27 Natural Resource Technology, Inc.67 proven and potential cases displayed in this spreadsheet

Only the 63 coal ash cases are summarized beginning in row 78 The 4 oil ash cases are at the bottom of the sheet

Site Name

Salem Acres Site (Massachusetts Electric Company)

City of Beverly/Vitale Brothers Fly Ash Pit (New

England Electric)

Don Frame Trucking, Inc. Fly Ash Landfill (Niagara Mohaw k)

Virginia Electric Power Co. (VEPCO) Possum Point

PEPCO Morgantown Generating Station Faulkner Off-site Disposal Facility

Virginia Power Yorktown Power Station Chisman Creek Disposal Site

Hyco Lake, Roxboro Georgia Power Company, Plant Bowen, Cartersville, GADepartment of Energy - Oak Ridge Y12 Plant Chestnut Ridge Operable Unit 2 DOE Oak Ridge Reservation, Oak Ridge, Tennessee

South Carolina Electric & Gas Canadys Plant, South Carolina

Belew s Lake, North Carolina

U.S. Department of Energy Savannah River Project, South Carolina Potential for Receptors (Via GW ) Number of

Potential Receptors Any

Exceedance Offsite

Exceedance? MCL

Exceedance? Other

Exceedance? Receptor &

Exceedance Receptor &

Offsite Receptor &

Offsite MCL Receptor &

Onsite Receptor &

Onsite MCL Remediation

Performed Cap CCP Removal Alt. GW Supply GW Extraction Barrier W all

No 0 0 no no 0 0 0 0 0 Yes No Yes No No No

Yes 5 1 0 Onsite Onsite 1 0 0 1 1 Yes No Yes No No No

Yes No information 1 1 no Offsite 1 1 0 0 0 Yes Clay No 1 well No No

No 0 0 0 no no 0 0 0 0 0 Yes No Yes No No No

Yes 1 1 0 Onsite Onsite 1 0 0 1 1 Yes Yes No No No Yes

Yes 55 1 1 Offsite Offsite 1 1 1 0 0 Yes Soil No 55 homes Yes No

n/a 0 0 no no 0 0 0 0 0 Yes No No No No No

n/a 0 0 no no 0 0 0 0 0 Yes No Yes No No No

No 1 0 Onsite Onsite 0 0 0 0 0 Yes No No No No No

Yes 3 1 0 Onsite Onsite 1 0 0 1 1 Yes No Partial No No Yes

n/a 0 0 no no 0 0 0 0 0 Yes No No No No No

No 0 0 no no 0 0 0 0 0 No information

EPA-HQ-RCRA-2009-0640-DRAFT-0346.xls - 67 Cases Page 6 of 27 Natural Resource Technology, Inc.67 proven and potential cases displayed in this spreadsheet

Only the 63 coal ash cases are summarized beginning in row 78 The 4 oil ash cases are at the bottom of the sheet

Site Name

Dairy Power Cooperative E.J. Stoneman Generating Station Ash Disposal Pond, W isconsin

WE PCO Highway 59 Landfill, Wi sconsin

Alliant (Formerly W isconsin Power & Light) Nelson Dewey Ash Disposal Facility, W isconsin

WE PCO Cedar-Sauk Landfill, Wi sconsin

Wi sconsin Electric Power Co. (W EPCO) Port W ashington Facility, Wi sconsin (Druecker) Lansing Board of W ater & Light (LBW L) North Lansing Landfill, Michigan
Northern Indiana Public Service Corp. (NIPSCO) Yard 520 Landfill Site (Brown's Landfill) Tow nship of Pines, Porter County, IN

Brandy Branch Reservoir, Texas

Southwestern Electric Power Company W elsh Reservoir, Texas Texas Utilities Electric Martin Creek Reservoir, Texas
Basin Electric Power Cooperative W. J. Neal Station Surface Impoundment, North Dakota Cooperative Power Association/United Power Coal Creek Station Surface Impoundments, North Dakota K.R. Rezendes South Main Street Ash Landfill, Freetown, Massachusetts oil ash site, see below AES Creative Resources W eber Ash Disposal Site, New

York Central Hudson Gas and Electric Corporation Danskammer W aste Management Facility, New York Potential for

Receptors (Via GW ) Number of

Potential Receptors Any

Exceedance Offsite

Exceedance? MCL

Exceedance? Other

Exceedance? Receptor &

Exceedance Receptor &

Offsite Receptor &

Offsite MCL Receptor &

Onsite Receptor &

Onsite MCL Remediation

Performed Cap CCP Removal Alt. GW Supply GW Extraction Barrier W all

Yes 50 1 1 Offsite Offsite 1 1 1 0 0 Yes Clay Partial 1 village well and some private wells No No

Yes 50 1 1 no Offsite 1 1 0 0 0 Yes PVC Partial 14 wells No No

Yes 2 1 0 Onsite Onsite 1 0 0 1 1 Yes GCL No No No No

Yes 2 1 1 Onsite Offsite 1 1 0 0 1 Yes PVC No No Yes No

Yes 30 1 0 no Onsite 1 0 0 1 0 Yes PVC No 1 well No No

No 1 1 Onsite Offsite 0 0 0 0 0 Yes Soil No No Yes Yes

Yes 340 1 1 Offsite Offsite 1 1 1 0 0 Yes Clay No 340 wells No No

n/a 0 0 no no 0 0 0 0 0 Yes No No No No No

n/a 0 0 no no 0 0 0 0 0 Yes No No No No No
n/a 0 0 no no 0 0 0 0 0 Yes No No No No No

Yes 5 1 0 Onsite Onsite 1 0 0 1 1 Yes Clay Partial No No No

No 1 0 Onsite Onsite 0 0 0 0 0 Yes No No No No No

No 1 0 Onsite no 0 0 0 0 0 Yes Partial No No No No

Yes 15 1 0 no Onsite 1 0 0 1 0 Yes LLDPE No No No No

No 1 0 no Onsite 0 0 0 0 0 No information

EPA-HQ-RCRA-2009-0640-DRAFT-0346.xls - 67 Cases Page 7 of 27 Natural Resource Technology, Inc.67 proven and potential cases displayed in this spreadsheet

Only the 63 coal ash cases are summarized beginning in row 78 The 4 oil ash cases are at the bottom of the sheet

Site Name C.R. Huntley Fly ash Landfill, New York Elrama Plant, Pennsylvania Tennessee Valley Authority - Bull Run Steam Plant, Oak Ridge, Tennessee Tennessee Valley Authority W idow s Creek Fossil Fuel Plant, Alabama
Tennessee Valley Authority Colbert Fossil Fuel Plant, Alabama
Duke Power Allen Steam Generating Plant, North Carolina Cinergy East Bend Scrubber Sludge Landfill, Kentucky Florida Power and Light Lansing Smith Plant, Florida oil ash site, see below oil ash site, see below oil ash site, see below Commonwealth Edison Powerton Plant - Mahoney Landfill, Pekin, Tazewell County, Illinois Xcel Energy/Southern Minnesota Municipal Power Agency - Sherburne County (Sherco) Generating Plant Becker, Minnesota Alliant Rock River Ash Disposal Facility, W isconsin Michigan City Site, Michigan City, Indiana Bailly Generating Station, Indiana Alliant Edgewater 1-4 Ash Disposal Site, W isconsin Wi sconsin Power Supply Company (W PSC) Pulliam Ash Disposal Site, Wi sconsin Central Illinois Light Co. Duck Creek Station , Illinois

Illinois Power Company Hennepin Power Station Illinois

Illinois Power Company Havanna Power Plant, Illinois Potential for Receptors (Via GW ) Number of

Potential Receptors Any

Exceedance Offsite

Exceedance? MCL

Exceedance? Other

Exceedance? Receptor &

Exceedance Receptor &

Offsite Receptor &

Offsite MCL Receptor &

Onsite Receptor &

Onsite MCL Remediation

Performed Cap CCP Removal Alt. GW Supply GW Extraction Barrier W all

No 1 0 Onsite Onsite 0 0 0 0 0 No information

No 0 0 no no 0 0 0 0 0 No information

No 1 0 no Onsite 0 0 0 0 0 Yes No No No No No

No 0 0 no no 0 0 0 0 0 No

No 1 0 no Onsite 0 0 0 0 0 Yes No No No No No

No 0 0 no no 0 0 0 0 0 No

No 1 0 no Onsite 0 0 0 0 0 No

No 0 0 no no 0 0 0 0 0 No

No 1 0 no Onsite 0 0 0 0 0 No information

No 1 0 no Onsite 0 0 0 0 0 No information

No 1 0 Onsite Onsite 0 0 0 0 0 Yes Soil No No No No

No 1 0 Onsite no 0 0 0 0 0 No information

Yes 20 1 1 Onsite Offsite 1 1 0 0 1 Yes No Yes No No No

Yes 20 1 0 no Onsite 1 0 0 1 0 Yes Clay No No No No

No 1 0 no Onsite 0 0 0 0 0 Yes Soil No No No No

No 1 0 no Onsite 0 0 0 0 0 Pending

No 1 0 no Onsite 0 0 0 0 0 Yes No No No No No

No 1 0 no Onsite 0 0 0 0 0 Yes Soil No No No No

EPA-HQ-RCRA-2009-0640-DRAFT-0346.xls - 67 Cases Page 8 of 27 Natural Resource Technology, Inc.67 proven and potential cases displayed in this spreadsheet

Only the 63 coal ash cases are summarized beginning in row 78 The 4 oil ash cases are at the bottom of the sheet

Site Name Dairyland Power Alma On-Site Fly Ash Landfill, W isconsin Dairyland Power Alma Off-Site Fly Ash Landfill, W isconsin

Illinois Power Vermillion Power Station, Illinois

Central Illinois Public Service Company Hutsonville Power Station, Illinois
Illinois Power Company W ood River Power Station, Illinois
R.M. Schahfer Generating Station, IN
Coffeen/W hite & Brewer Trucking Fly Ash Landfill, Illinois

Southern Indiana Gas and Electric Company (SIGECO) A.B. Brown Generating Station, Indiana
Cincinnati Gas & Electric Co. Miamiview

Landfill, Ohio Indiana Power & Light Petersburg Generating Station, Indiana Hoosier Energy Merom Generating Station Coal Combustion W aste Landfill, Indiana

Cinergy W .C. Beckjord Station, Ohio

Lemberger Landfill, W isconsin

Conesville Fixed FGD Sludge Landfill, Ohio Muscatine County Landfill, Iowa
Dave Johnston Power Plant, Wyoming Potential for Receptors (Via GW ) Number of

Potential Receptors Any

Exceedance Offsite

Exceedance? MCL

Exceedance? Other

Exceedance? Receptor &

Exceedance Receptor &

Offsite Receptor &

Offsite MCL Receptor &

Onsite Receptor &

Onsite MCL Remediation

Performed Cap CCP Removal Alt. GW Supply GW Extraction Barrier W all
No 1 0 no Onsite 0 0 0 0 0 Yes Clay No No No No
Yes 6 1 0 no Onsite 1 0 0 1 0 Yes Clay No No No No

No 0 0 no no 0 0 0 0 0 No

No 1 0 no Onsite 0 0 0 0 0 Pending HDPE No No Yes No

No 1 0 no Onsite 0 0 0 0 0 Yes No Yes No No No

No 1 0 no Onsite 0 0 0 0 0 Yes Geomembrane No No No No

No 1 0 Onsite Onsite 0 0 0 0 0 Yes Clay No No No No

Yes 1 1 0 Onsite Onsite 1 0 0 1 1 Yes No No No No Yes

No 1 0 no Onsite 0 0 0 0 0 Yes Clay No No No No
No 0 0 no no 0 0 0 0 0 No

No 1 0 Onsite Onsite 0 0 0 0 0 Yes Soil No No See Notes No

Yes 30 1 0 Onsite Onsite 1 0 0 1 1 Yes No No No Yes No

Yes 23 0 0 no no 0 0 0 0 0 Yes Yes No No Yes Yes

No 1 0 Onsite Onsite 0 0 0 0 0 Yes Clay No No No No
Yes 8 1 0 no Onsite 1 0 0 1 0 No information

No 0 0 no no 0 0 0 0 0 No information

EPA-HQ-RCRA-2009-0640-DRAFT-0346.xls - 67 Cases Page 9 of 27 Natural Resource Technology, Inc.67 proven and potential cases displayed in this spreadsheet

Only the 63 coal ash cases are summarized beginning in row 78 The 4 oil ash cases are at the bottom of the sheet

Site Name

Montana-Dakota Utilities R.M. Heskett Station, North Dakota
Arizona Public Service Co. Cholla Steam Electric Generating Station, Arizona Potential for Receptors (Via GW ) Number of

Potential Receptors Any

Exceedance Offsite

Exceedance? MCL

Exceedance? Other

Exceedance? Receptor &

Exceedance Receptor &

Offsite Receptor &

Offsite MCL Receptor &

Onsite Receptor &

Onsite MCL Remediation

Performed Cap CCP Removal Alt. GW Supply GW Extraction Barrier W all

Yes 2 1 0 Onsite Onsite 1 0 0 1 1 Yes Clay No No No No

No 0 0 no no 0 0 0 0 0 No information

EPA-HQ-RCRA-2009-0640-DRAFT-0346.xls - 67 Cases Page 10 of 27 Natural Resource Technology, Inc.67 proven and potential cases displayed in this spreadsheet

Only the 63 coal ash cases are summarized beginning in row 78 The 4 oil ash cases are at the bottom of the sheet

Site Name

Salem Acres Site (Massachusetts Electric Company)

City of Beverly/Vitale Brothers Fly Ash Pit (New

England Electric)

Don Frame Trucking, Inc. Fly Ash Landfill (Niagara Mohaw k)

Virginia Electric Power Co. (VEPCO) Possum Point

PEPCO Morgantown Generating Station Faulkner Off-site Disposal Facility

Virginia Power Yorktown Power Station Chisman Creek Disposal Site

Hyco Lake, Roxboro Georgia Power Company, Plant Bowen, Cartersville, GADepartment of Energy - Oak Ridge Y12 Plant Chestnut Ridge Operable Unit 2 DOE Oak Ridge Reservation, Oak Ridge, Tennessee

South Carolina Electric & Gas Canadys Plant, South Carolina

Belew s Lake, North Carolina

U.S. Department of Energy Savannah River Project, South Carolina Remedial Activities Mitigation Notes Approximately 11,000 cubic yards of fly ash removed from the site in 1995 and about 1,000 cubic yards of fly ash from the adjacent wetland in 1999. Interim remedial actions in the 1980s included capping the wastes and constructing slurry walls. Remediat 235-acre landfill w ith a small fly ash pile; listed on NPL for contaminated sludge ponds, but these contained other wastes. Removed from NPL list in 2001.

Fly ash removed, site redesigned to protect wetlands Fly ash migrated dow n a stream to W enham Lake, and was reportedly removed. No water quality exceedances reported at the water treatment plant that draws from the lake. Closure request submitted in 2007 A water supply well was abandoned and the building connected to a public wa ter supply. It is reported that the NY State Department of Environmental Conservation (NYSDEC) required the landfill be capped w ith 10-7 clay Solids were dredged from the unlined pond and placed in a second lined facility. Remedial measures at the site included closure and capping of older units (1996), installation of liners in newer units (1993), installation of a slurry wall to prevent ground water migration (1994), and rehabilitation of a portion of a stream (1995).
Remediation included a groundwater collection and treatment system, construction of a low-permeability soil cap, a soil cover, alternate water supply for 55 nearby homes, and relocating a portion of the tributary. Changed from wet to dry ash handling system. All fish advisories removed in 2001. Vacuumed ash from the creek, grouted and filled the sinkhole, and grouted portions of the dike. Stabilized ash pond dam, reconstructed wetlands. Completed under USEPA ROD Plant converted to dry ash management in 1990. The filled coal ash pond (FCAP) is one of many operable units comprising the Oak Ridge NPL site.

About 80% of the ash was mined from the pond for beneficial reuse, and a slurry wall was installed in 1996. A dewatering system was added in 2007. A slurry wall was also constructed at the pond that replaced the pond that is subject of the damage case report.

Dry ash handling system introduced in 1984 and ash basin discharge was rerouted so it did not enter the lake. Fly ash currently managed in a landfill. Fish advisory for selenium rescinded in 2000
Note: This facility had no contaminant directly related to its case, it was considered due to impact on the local species. Other contaminants detected include radionuclide, VOCs, pesticides, herbicides, nitrates, and metals.

EPA-HQ-RCRA-2009-0640-DRAFT-0346.xls - 67 Cases Page 11 of 27 Natural Resource Technology, Inc.67 proven and potential cases displayed in this spreadsheet

Only the 63 coal ash cases are summarized beginning in row 78 The 4 oil ash cases are at the bottom of the sheet

Site Name

Dairy Power Cooperative E.J. Stoneman Generating Station Ash Disposal Pond, W isconsin

WE PCO Highway 59 Landfill, Wi sconsin

Alliant (Formerly W isconsin Power & Light) Nelson Dewey Ash Disposal Facility, W isconsin

WE PCO Cedar-Sauk Landfill, Wi sconsin

Wi sconsin Electric Power Co. (W EPCO) Port W ashington Facility, Wi sconsin (Druecker) Lansing Board of W ater & Light (LBW L) North Lansing Landfill, Michigan
Northern Indiana Public Service Corp. (NIPSCO) Yard 520 Landfill Site (Brown's Landfill) Tow nship of Pines, Porter County, IN

Brandy Branch Reservoir, Texas

Southwestern Electric Power Company W elsh Reservoir, Texas Texas Utilities Electric Martin Creek Reservoir, Texas
Basin Electric Power Cooperative W. J. Neal Station Surface Impoundment, North Dakota Cooperative Power Association/United Power Coal Creek Station Surface Impoundments, North Dakota K.R. Rezendes South Main Street Ash Landfill, Freetown, Massachusetts oil ash site, see below AES Creative Resources W eber Ash Disposal Site, New

York Central Hudson Gas and Electric Corporation Danskammer W aste Management Facility, New York Remedial Activities Mitigation Notes

Discontinued use; installed cover (1- foot clay, 1 foot sand, and 6-inch topsoil) in 1989. Consolidated ash to 10-acre area away from residences. Replaced village well and provided village water to affected residences. Saturated ash excavation and placement of a PVC cap over the landfill completed in 2000/2001. Alternative drinking water source (municipal water supply) was provided to approximately 10 homes and our commercial buildings. Coal ash was removed from a one-acrea area w here it was known to be placed below water table.

Capping began in 1997 Changed to dry ash disposal in 1996. A clay barrier cap was placed over the site in 1982, a groundwater extraction system was operated at the site from 1984 until 1997. The cap was upgraded to w ith a geosynthetic material (30-mil PVC) and an upper drainage layer in 1997. Site Capped. One water supply replaced. Contaminated private well was located about 250 feet from fill area. Slurry wall with gradient control system. Soil cap planned but not constructed as of 2009. Remediation system for an adjacient superfund site appears to be capturing dow ngradient plume. Site is in urban area serviced by municipal water; no potable wells within one mile. Alternative groundwater supplies provided between 2003 and 2005. In 2006/2007, both portions of the landfill we re capped with 2-feet of clay covered by topsoil, in accordance w ith IDEM requirements. Discharge from the coal pile was diverted to the FGD system to mitigate any effects that discharge may have had on the fish population in the reservoir. Site should not be a CCW damage case because neither CCW or effluent from a CCW pond was ever directed to this cooling water resevoir. Eliminated discharge of efflunet from fly ash impoundments to reservoir. Eliminated discharge of efflunet from fly ash impoundments to reservoir; lined some ponds. In 1990, ash was consolidated to a 22- acre footprint and then capped w ith 18- inch engineered clay cover and an 18- inch layer of top soil, w hich was seeded and mulched. 8/31/95 report - As attributable to landfill, but Cd, Cu, Pb in city we ll not tied to site (Zn also in city well). Also, USEPA Reg. VIII Rem Site Ass Decision (3-3-00) stated no Assessment required The ponds were relined with a composite geosynthetic/clay liners between 1987 and 1993. A partial cap of unknow n design is reported for this site. MADEP reportedly required additional site monitoring wells and surface water sampling w hen the monitoring program was modified. The property ow ner is currently proposing to build a retail complex over the site. Closed and capped in 2001. Cap features a 60-mil LLDPE barrier between 120 mil geotextile layers.

EPA-HQ-RCRA-2009-0640-DRAFT-0346.xls - 67 Cases Page 12 of 27 Natural Resource Technology, Inc.67 proven and potential cases displayed in this spreadsheet

Only the 63 coal ash cases are summarized beginning in row 78 The 4 oil ash cases are at the bottom of the sheet

Site Name C.R. Huntley Fly ash Landfill, New York Elrama Plant, Pennsylvania Tennessee Valley Authority - Bull Run Steam Plant, Oak Ridge, Tennessee Tennessee Valley Authority W idow s Creek Fossil Fuel Plant, Alabama
Tennessee Valley Authority Colbert Fossil Fuel Plant, Alabama
Duke Power Allen Steam Generating Plant, North Carolina Cinergy East Bend Scrubber Sludge Landfill, Kentucky Florida Power and Light Lansing Smith Plant, Florida oil ash site, see below oil ash site, see below oil ash site, see below Commonwealth Edison Powerton Plant - Mahoney Landfill, Pekin, Tazewell County, Illinois Xcel Energy/Southern Minnesota Municipal Power Agency - Sherburne County (Sherco) Generating Plant Becker, Minnesota Alliant Rock River Ash Disposal Facility, W isconsin Michigan City Site, Michigan City, Indiana Bailly Generating Station, Indiana Alliant Edgewater 1-4 Ash Disposal Site, W isconsin Wi sconsin Power Supply Company (W PSC) Pulliam Ash Disposal Site, Wi sconsin Central Illinois Light Co. Duck Creek Station , Illinois

Illinois Power Company Hennepin Power Station Illinois

Illinois Power Company Havanna Power Plant, Illinois Remedial Activities Mitigation Notes

The only source of information identified for this facility was the 1988 Report to Congress In the mid-1970s, repairs were made and wastewater was routed through the impoundment’s NPDES permitted outfall. Exceedances were reportedly in a ditch adjacient to the impoundment.

Exceedance was reportedly in an ungradient well. Remediation listed is for metal cleaning wa ste basin: discontinued using small pond (which is not an ash impoundment) for acid cleaning in 1990s. Have abandoned know n leaking ponds and put in clay liner to catch coal pile runoff The damage case report is based either on concentrations near a 2-acre, clay-lined basin used to store metal cleaning wastes or a we ll screened in coal ash; inclusion of this facility as a damage case on this basis is questionable. Regardless, monitoring This facility does not appear to belong on the damage case list based on low

ash indicator concentrations in groundwater. Installed seepage collection to address seeps in some areas around landfill. The damage case attributed groundwater issues at this facility to the scrubber sludge landfill but a follow-up assessment performed by the utility identified the impoundment as the source of the issues. Groundwater is locally saline at depth

The only source of information identified for this facility was the 1988 Report to Congress
The only source of information identified for this facility was the 1988 Report to Congress Landfill capping began 2004 and finished 2007, included 2 feet of soil wi th 6-inch topsoil cover. Plant converted to natural gas in 2000

In 1978, the impoundments were dredged, then lined w ith HDPE over clay There are also two small landfills on site that do not appear th be the basis of the damage case assessment, both landfills are closed and capped. Landfill closed w ith clay cap in 1986 after construction of a new , upgraded landfill.

removed from service and replaced wi th lined facility.
The impoundments were removed from service and dewatered in 1996. Ash is now sluiced to a lined coal ash impoundment. There were two seperate unlined impoundments at this site. Concentrations of boron and sulfate at the 38-acre east impoundment rapidly decreased in most monitoring wells after the facility was dewatered. Concentrations have decreased more slowly at the
The impoundment was capped with native soils in 1994. Ash is now sluiced to a lined coal ash impoundment. Site closure obtained in 2009. There are no groundwater quality exceedances associated w ith the lined impoundment.

EPA-HQ-RCRA-2009-0640-DRAFT-0346.xls - 67 Cases Page 13 of 27 Natural Resource Technology, Inc.67 proven and potential cases displayed in this spreadsheet

Only the 63 coal ash cases are summarized beginning in row 78 The 4 oil ash cases are at the bottom of the sheet

Site Name Dairyland Power Alma On-Site Fly Ash Landfill, W isconsin Dairyland Power Alma Off-Site Fly Ash Landfill, W isconsin

Illinois Power Vermillion Power Station, Illinois

Central Illinois Public Service Company Hutsonville Power Station, Illinois
Illinois Power Company W ood River Power Station, Illinois
R.M. Schahfer Generating Station, IN
Coffeen/W hite & Brewer Trucking Fly Ash Landfill, Illinois

Southern Indiana Gas and Electric Company (SIGECO) A.B. Brown Generating Station, Indiana
Cincinnati Gas & Electric Co. Miamiview

Landfill, Ohio Indiana Power & Light Petersburg Generating Station, Indiana Hoosier Energy Merom Generating Station Coal Combustion W aste Landfill, Indiana

Cinergy W .C. Beckjord Station, Ohio

Lemberger Landfill, W isconsin

Conesville Fixed FGD Sludge Landfill, Ohio Muscatine County Landfill, Iowa
Dave Johnston Power Plant, Wyoming Remedial Activities Mitigation Notes 2-foot clay cap w ith 6-inch topsoil cover placed on the landfill in 1986. Ash is now placed in a facility with a synthetic liner and a leachate collection system Ash was originally slurried to the landfill.

Constructed over a shale bedrock unit w hich has very low hydraulic conductivity; slurry walls inside the berms, built at time of construction, are keyed into the bedrock. Facility is in an area of extensive former coal mining activity. The utility is planning construction of a synthetic cap and a trench to intercept impacted groundwater. In 1997-1998, ash was excavated from two unlined cells and lined cells were constructed in those areas. In 1999 the plant converted to a dry ash handling system and most ash is reportedly sold for beneficial reuse.
Site reclosed in 1998/1999 w ith membrane cap Built new landfill cell (1997) w ith composite liner and leachate collection system Cells A-D were capped from 1980 to 1990, Cell E was capped in 1997. Caps consist of 3 feet of clay w ith hydraulic conductivity of 10-7 cm/s. No aquifer at this site. Groundwater monitored in clay or sand seams. Slurry wall was installed in the NE corner of the original landfill in late 1987. Groundwater pumps have been installed in two wells in the NE corner for the last 10 years. Closed and capped in 1996

Area 2 was constructed with an underdrain to intercept in-flow ing perched GW ; the company also installed a toe-drain at Area 1 to intercept perched GW seeping from landfill. Modified ash hauling methods in Area 2 to prevent incidental ash to a perimeter ditch. There are two ash landfills at this site, Area 1 is a closed 101 acre site constructed in 1982, and Area 2A is an active 89 acre site constructed in 1994 w hich will soon be replaced by a new landfill that w ill also have a liner and underdrain system. The Ash sluicing ceased in 1985. Interceptor well installed 1993 toprohibit sulfate plume from reaching offsite public supply wells. The one public supply well that was located on-site has been abandoned. The receptor count includes a municipal water supply well field.

Remediation completed by September 1996 and included wastes relocation; landfill capping; slurry wall construction; leachate collection and groundwater treatment system installations; and implementing groundwater monitoring and use restrictions. Former gravel pit, was used as an open dump from 1940 to 1970. In 1976 and 1977, an estimated 1,750 to 2,500 cubic yards of fly ash was transported to the site monthly and used as daily cover.

2-foot clay cap w ith 6-inch topsoil cover placed on the landfill in 1988.

The only source of information identified for this facility was the 1988 Report to Congress

EPA-HQ-RCRA-2009-0640-DRAFT-0346.xls - 67 Cases Page 14 of 27 Natural Resource Technology, Inc.67 proven and potential cases displayed in this spreadsheet

Only the 63 coal ash cases are summarized beginning in row 78 The 4 oil ash cases are at the bottom of the sheet

Site Name

Montana-Dakota Utilities R.M. Heskett Station, North Dakota
Arizona Public Service Co. Cholla Steam Electric Generating Station, Arizona Remedial Activities Mitigation Notes Site was closed and capped in 1989/1990. Clay cap constructed per North Dakota Department of Health guidance, and cap re vegetated in 1990. Rural water supplies provided to the only two landowners within 1/4 mile of the site.
Shallow groundwater in area reportedly has low quality due to natural causes.

EPA-HQ-RCRA-2009-0640-DRAFT-0346.xls - 67 Cases Page 15 of 27 Natural Resource Technology, Inc.54 proven and potential coal ash cases with groundwater impacts displayed in this spreadsheet

Oil ash and surface water cases are not displayed here

Site Name # Category Media State Utility Landowner ThirdParty? Offsite Site Size (acres) Coal

Ash FGD Solids FSS Other (list) Type Former Mine / Quarry? Liner Liner

Type LCS Sat. Ash? Year Opened Year

Closed On

NPL? Facility Closed Monitoring

Continues Potential for

Receptors (Via GW )

Salem Acres Site (Massachusetts Electric Company) 1 I GW MA Mass. Electric Non-utility No informatio n Yes 0.6 CCW no no sewage sludge, tannery wastes, MSW LF No no n/a No informatio n 1952 1969 Yes Yes No No

City of Beverly/Vitale Brothers Fly Ash Pit (New

England Electric) 2 I GW MA New England Electric Non-utility Yes Yes 18 CCW no no appliances, scrapped autos LF Sand and Gravel no n/a Yes 1950 1975 No No No information Yes

Don Frame Trucking, Inc. Fly Ash Landfill (Niagara Mohaw k) 3 I GW NY Niagare Mohawk Non-utility No informatio n Yes no information CCW no no other materials including yard sweepings LF No informati on No

informati on No

informati on No

informatio n No

informatio n No

informati on No No Reportedly Yes

Virginia Electric Power Co. (VEPCO) Possum Point 4 I GW VA Dominion Dominion No No 40 RCC no no Oil Ash IMP No no n/a no No informatio n No

informati on No Yes No information No

PEPCO Morgantown Generating Station Faulkner Off-site Disposal Facility 5 I GW MD Mirant Mirant No No 181 RCC no no no LF No informati on Partial No

informati on Partial No

informatio n 1970 Active No No Yes Yes

Virginia Power Yorktown Power Station Chisman Creek Disposal Site 6 I GW VA Dominion Dominion No informatio n Yes 27 CCW no no Pet Coke LF Sand and Gravel no n/a No informatio n 1957 1974 Yes No Yes Yes

South Carolina Electric & Gas Canadys Plant, South Carolina 10 I GW SC SCANA SCANA No No 175 CCW no no no IMP No no n/a no 1974 Active No Yes Yes

Dairy Power Cooperative E.J. Stoneman Generating Station Ash Disposal Pond, W isconsin 13 I GW WI Dairyland Dairyland No No 22 CCW no no no IMP No no n/a Yes 1950 1987 No No Yes Yes

WE PCO Highway 59 Landfill, Wi sconsin 14 I GW WI We Energies We Energies No Yes 23 CCW no no no LF Sand and Gravel no n/a Yes 1969 1979 No No Yes Yes

Alliant (Formerly W isconsin Power & Light) Nelson Dewey Ash Disposal Facility, W isconsin 15 I GW WI Alliant Alliant No No 24 CCW no no no IMP No no n/a Yes 1958 2001 No No Yes Yes

EPA-HQ-RCRA-2009-0640-DRAFT-0346.xls - 54 Groundwater Cases Page 16 of 27 Natural Resource Technology, Inc.54 proven and potential coal ash cases with groundwater impacts displayed in this spreadsheet

Oil ash and surface water cases are not displayed here

Site Name # Category Media State Utility Landowner ThirdParty? Offsite Site Size (acres) Coal

Ash FGD Solids FSS Other (list) Type Former Mine / Quarry? Liner Liner

Type LCS Sat. Ash? Year Opened Year

Closed On

NPL? Facility Closed Monitoring

Continues Potential for

Receptors (Via GW )

WE PCO Cedar-Sauk Landfill, Wi sconsin 16 I GW WI We Energies We Energies No Yes 28 CCW no no no LF Sand and Gravel no n/a No 1969 1979 No No Yes Yes

Wi sconsin Electric Power Co. (W EPCO) Port W ashington Facility, Wi sconsin (Druecker) 17 I GW WI We Energies We Energies Yes Yes 15 CCW no no no LF Rock no n/a Yes 1948 1971 No No Yes Yes Lansing Board of W ater & Light (LBW L) North Lansing Landfill, Michigan 18 I GW MI LBW L LBW L No Yes 27 CCW no no no LF Sand and Gravel no n/a Yes 1980 1997 No No Yes No

Northern Indiana Public Service Corp. (NIPSCO) Yard 520 Landfill Site (Brown's Landfill) Tow nship of Pines, Porter County, IN 19 I GW IN Nisource Nisource No informatio n Yes 45 CCW no no no LF No Partial Clay no 1965 2001 No No Yes Yes

Basin Electric Power Cooperative W. J. Neal Station Surface Impoundment, North Dakota 23 I GW ND Basin Electric Power Coop. Basin Electric

Power Coop. No No 44 CCW no no no IMP No no n/a no 1955 1988 No Yes No Yes
Cooperative Power Association/United Power Coal Creek Station Surface Impoundments, North Dakota 24 I GW ND Great River Energy Great River

Energy No No 220 no Yes no Mill rejects, small amounts of bottom ash. IMP No Retrofit Composi te no 1978 Active No No Yes No

K.R. Rezendes South Main Street Ash Landfill, Freetown, Massachusetts 25 II GW MA PG&E Non-utility No informatio n Yes 31.5 CCW no no no LF Sand and Gravel no n/a no 1975 2001 No No No information No

AES Creative Resources W eber Ash Disposal Site, New

York 27 II GW NY AES AES No Yes 12.1 CCW no no no LF No Yes PVC Yes no 1978 2001 No No Yes Yes Central Hudson Gas and Electric Corporation Danskammer W aste Management Facility, New York 28 II GW NY Dynegy Dynegy No No no information CCW no no no LF No informati on No

informati on No

informati on No

informatio n No

informatio n No

informati on No No

informati on No information No C.R. Huntley Fly ash Landfill, New York 29 II GW NY NRG NRG No No no information CCW no no no LF No informati on No

informati on No

informati on No

informatio n No

informatio n No

informati on No No

informati on No information No
Elrama Plant, Pennsylvania 30 II GW PA Reliant Reliant No Yes 22 CCW no Poz-OTec no LF Coal no n/a No 1979 No informati on No No

informati on No information No Tennessee Valley Authority W idow s Creek Fossil Fuel Plant, Alabama 32 II GW AL TVA TVA No No 310 CCW no no no IMP No no n/a No 1950 Active No No No No

Tennessee Valley Authority Colbert Fossil Fuel Plant, Alabama 33 II GW AL TVA TVA No No See Notes CCW no no no IMP No Retrofit Clay no 1975 Active No No Yes No

Duke Power Allen Steam Generating Plant, North Carolina 34 II GW NC Duke Energy Duke Energy No No 170 CCW no no no IMP No no n/a No 1973 Active No No Yes No Cinergy East Bend Scrubber Sludge Landfill, Kentucky 35 II GW KY Duke Energy Duke Energy No No 213 no no Yes bottom ash and mill rejects IMP/LF No Partial n/a No 1981 Active No No Yes No
Florida Power and Light Lansing Smith Plant, Florida 36 II GW FL Southern Southern No No 172 CCW no no no IMP No no n/a No 1965 Active No No No information No Commonwealth Edison Powerton Plant - Mahoney Landfill, Pekin, Tazewell County, Illinois 40 II GW IL Midwest Generation Uncertain Yes Yes 40 CCW no no no LF Sand and Gravel Yes Poz-OPac Yes 1972 1982 No No informati on No information No

EPA-HQ-RCRA-2009-0640-DRAFT-0346.xls - 54 Groundwater Cases Page 17 of 27 Natural Resource Technology, Inc.54 proven and potential coal ash cases with groundwater impacts displayed in this spreadsheet

Oil ash and surface water cases are not displayed here

Site Name # Category Media State Utility Landowner ThirdParty? Offsite Site Size (acres) Coal

Ash FGD Solids FSS Other (list) Type Former Mine / Quarry? Liner Liner

Type LCS Sat. Ash? Year Opened Year

Closed On

NPL? Facility Closed Monitoring

Continues Potential for

Receptors (Via GW ) Xcel Energy/Southern Minnesota Municipal Power Agency - Sherburne County (Sherco) Generating Plant Becker, Minnesota 41 II GW MN Xcel Xcel No No 62 CCW Yes no no IMP No Yes Clay No 1976 No informati on No No

informati on No information No

Alliant Rock River Ash Disposal Facility, W isconsin 42 II GW WI Alliant Alliant No No 17 CCW no no no LF No no n/a Yes 1954 2007 No No Yes No Michigan City Site, Michigan City, Indiana 43 II GW IN Nisource Nisource No No no information CCW no no no IMP No informati on No

informati on No

informati on No

informatio n No

informatio n No

informati on No No

informati on No information No
Bailly Generating Station, Indiana 44 II GW IN Nisource Nisource No No 14 CCW no no no IMP No Retrofit HDPE no 1962 Active No No Yes Yes Alliant Edgewater 1-4 Ash Disposal Site, W isconsin 45 II GW WI Alliant Alliant No No 17 CCW no no no LF No no n/a Yes 1969 1986 No No Yes Yes Wi sconsin Power Supply Company (W PSC) Pulliam Ash Disposal Site, Wi sconsin 46 II GW WI Integrys Integris No No 80 CCW no no no LF No no n/a Yes 1971 1986 No No Yes No Central Illinois Light Co. Duck Creek Station , Illinois 47 II GW IL Ameren Ameren No No 140 CCW no no no IMP No no n/a no No informatio n 2009 No No Yes No

Illinois Power Company Hennepin Power Station Illinois 48 II GW IL Dynegy Midwest Generation Dynegy Midwest

Generation No No 68 CCW no no no IMP No no n/a Yes 1952 1996 No No Yes No

Illinois Power Company Havanna Power Plant, Illinois 49 II GW IL Dynegy Midwest Generation Dynegy Midwest

Generation No No 30 CCW no no no IMP No no n/a No 1977 1994 No Yes No No Dairyland Power Alma On-Site Fly Ash Landfill, W isconsin 50 II GW WI Dairyland Dairyland No No 56 CCW no no no LF No no n/a Yes 1947 1986 No No Yes No Dairyland Power Alma Off-Site Fly Ash Landfill, W isconsin 51 II GW WI Dairyland Dairyland No Yes 29 CCW no no no LF No Yes Clay no 1983 2007 No No Yes Yes

Illinois Power Vermillion Power Station, Illinois 52 II GW IL Dynegy Midwest Generation Dynegy Midwest

Generation No No 12 CCW no no no IMP No Yes See notes no 1989 Active No No Yes No

Central Illinois Public Service Company Hutsonville Power Station, Illinois 53 II GW IL Ameren Ameren No No 22 CCW no no no IMP No no n/a Yes 1968 2000 No No Yes No

Illinois Power Company W ood River Power Station, Illinois 54 II GW IL Dynegy Midwest Generation Dynegy Midwest

Generation No No 60 CCW no no no IMP No Partial See notes Partial no 1978 Active No No Yes No

R.M. Schahfer Generating Station, IN 55 II GW IN Nisource Nisource No No 230 CCW no Yes no LF No Partial Composi te Partial no 1984 Active No No Yes No

Coffeen/W hite & Brewer Trucking Fly Ash Landfill, Illinois 56 II GW IL Ameren Non-utility yes Yes 40 CCW no no no LF No no n/a Yes 1977 1997 No No Yes No

Southern Indiana Gas and Electric Company (SIGECO) A.B. Brown Generating Station, Indiana 57 II GW IN Vectren Vectren No No 130 no yes no no LF No Partial Clay No informatio n 1979 No

informati on No No Yes Yes

EPA-HQ-RCRA-2009-0640-DRAFT-0346.xls - 54 Groundwater Cases Page 18 of 27 Natural Resource Technology, Inc.54 proven and potential coal ash cases with groundwater impacts displayed in this spreadsheet

Oil ash and surface water cases are not displayed here

Site Name # Category Media State Utility Landowner ThirdParty? Offsite Site Size (acres) Coal

Ash FGD Solids FSS Other (list) Type Former Mine / Quarry? Liner Liner

Type LCS Sat. Ash? Year Opened Year

Closed On

NPL? Facility Closed Monitoring

Continues Potential for

Receptors (Via GW ) Cincinnati Gas & Electric Co. Miamiview

Landfill, Ohio 58 II GW OH Duke Energy Duke Energy No Yes 100 CCW no no no LF Sand and Gravel Yes Clay no 1983 1997 No Yes No No Indiana Power & Light Petersburg Generating Station, Indiana 59 II GW IN AES/IPL AES/IPL No No 75 no no Poz-OTec no LF No no n/a no 1976 Active No No No information No
Hoosier Energy Merom Generating Station Coal Combustion W aste Landfill, Indiana 60 II GW IN Hoosier Energy Hoosier Energy No No 190 CCW no Poz-OTec no LF No Partial Clay Yes 1982 Active No No Yes No

Cinergy W .C. Beckjord Station, Ohio 61 II GW OH Duke Energy Duke Energy No No 34 CCW no no no IMP No no n/a no 1956 1985 No No Yes Yes

Lemberger Landfill, W isconsin 62 II GW WI Manitowoc Pub. Utilities Non-utility No informatio n Yes 21 CCW no no MSW LF Sand and Gravel no n/a No informatio n 1940 1976 Yes No Yes Yes

Conesville Fixed FGD Sludge Landfill, Ohio 63 II GW OH AEP AEP No No 50 no no Yes No LF No no n/a no 1976 1988 No Yes No No Muscatine County Landfill, Iowa 64 II GW IA No information Non-utility No informatio n Yes no information CCW no no No information LF No informati on no n/a Yes 1964 1973 No No informati on No information Yes

Dave Johnston Power Plant, Wyoming 65 II GW WY Pacificorp Pacificorp No No 50 CCW no no no LF No no n/a No No informatio n No

informati on No No

informati on No information No

Montana-Dakota Utilities R.M. Heskett Station, North Dakota 66 II GW ND MDU Resources MDU Resources No No 15 CCW no no no LF No no n/a no 1954 1989 No No Yes Yes

Arizona Public Service Co. Cholla Steam Electric Generating Station, Arizona 67 II GW AZ APS APS No No no information CCW no no no IMP No informati on No

informati on No

informati on No

informatio n No

informatio n No

informati on No No No information No

EPA-HQ-RCRA-2009-0640-DRAFT-0346.xls - 54 Groundwater Cases Page 19 of 27 Natural Resource Technology, Inc.54 proven and potential coal ash cases with groundwater impacts displayed in this spreadsheet

Oil ash and surface water cases are not displayed here

Site Name

Salem Acres Site (Massachusetts Electric Company)

City of Beverly/Vitale Brothers Fly Ash Pit (New

England Electric)

Don Frame Trucking, Inc. Fly Ash Landfill (Niagara Mohaw k)

Virginia Electric Power Co. (VEPCO) Possum Point

PEPCO Morgantown Generating Station Faulkner Off-site Disposal Facility

Virginia Power Yorktown Power Station Chisman Creek Disposal Site

South Carolina Electric & Gas Canadys Plant, South Carolina

Dairy Power Cooperative E.J. Stoneman Generating Station Ash Disposal Pond, W isconsin

WE PCO Highway 59 Landfill, Wi sconsin

Alliant (Formerly W isconsin Power & Light) Nelson Dewey Ash Disposal Facility, W isconsin Number of Potential Receptors Any

Exceedance Offsite

Exceedance? MCL

Exceedance? Other

Exceedance? Receptor &

Exceedance Receptor &

Offsite Receptor &

Offsite MCL Receptor &

Onsite Receptor &

Onsite MCL Remediation

Performed Cap CCP Removal Alt. GW Supply GW Extraction Barrier W all

0 0 no no 0 0 0 0 0 Yes No Yes No No No

5 1 0 Onsite Onsite 1 0 0 1 1 Yes No Yes No No No

No information 1 1 no Offsite 1 1 0 0 0 Yes Clay No 1 well No No

0 0 0 no no 0 0 0 0 0 Yes No Yes No No No

1 1 0 Onsite Onsite 1 0 0 1 1 Yes Yes No No No Yes

55 1 1 Offsite Offsite 1 1 1 0 0 Yes Soil No 55 homes Yes No

3 1 0 Onsite Onsite 1 0 0 1 1 Yes No Partial No No Yes

50 1 1 Offsite Offsite 1 1 1 0 0 Yes Clay Partial 1 village well and some private wells No No

50 1 1 no Offsite 1 1 0 0 0 Yes PVC Partial 14 wells No No

2 1 0 Onsite Onsite 1 0 0 1 1 Yes GCL No No No No

EPA-HQ-RCRA-2009-0640-DRAFT-0346.xls - 54 Groundwater Cases Page 20 of 27 Natural Resource Technology, Inc.54 proven and potential coal ash cases with groundwater impacts displayed in this spreadsheet

Oil ash and surface water cases are not displayed here

Site Name

WE PCO Cedar-Sauk Landfill, Wi sconsin

Wi sconsin Electric Power Co. (W EPCO) Port W ashington Facility, Wi sconsin (Druecker) Lansing Board of W ater & Light (LBW L) North Lansing Landfill, Michigan
Northern Indiana Public Service Corp. (NIPSCO) Yard 520 Landfill Site (Brown's Landfill) Tow nship of Pines, Porter County, IN

Basin Electric Power Cooperative W. J. Neal Station Surface Impoundment, North Dakota Cooperative Power Association/United Power Coal Creek Station Surface Impoundments, North Dakota K.R. Rezendes South Main Street Ash Landfill, Freetown, Massachusetts AES Creative Resources W eber Ash Disposal Site, New

York Central Hudson Gas and Electric Corporation Danskammer W aste Management Facility, New York C.R. Huntley Fly ash Landfill, New York Elrama Plant, Pennsylvania Tennessee Valley Authority W idow s Creek Fossil Fuel Plant, Alabama
Tennessee Valley Authority Colbert Fossil Fuel Plant, Alabama
Duke Power Allen Steam Generating Plant, North Carolina Cinergy East Bend Scrubber Sludge Landfill, Kentucky Florida Power and Light Lansing Smith Plant, Florida Commonwealth Edison Powerton Plant - Mahoney Landfill, Pekin, Tazewell County, Illinois Number of Potential Receptors Any

Exceedance Offsite

Exceedance? MCL

Exceedance? Other

Exceedance? Receptor &

Exceedance Receptor &

Offsite Receptor &

Offsite MCL Receptor &

Onsite Receptor &

Onsite MCL Remediation

Performed Cap CCP Removal Alt. GW Supply GW Extraction Barrier W all

2 1 1 Onsite Offsite 1 1 0 0 1 Yes PVC No No Yes No

30 1 0 no Onsite 1 0 0 1 0 Yes PVC No 1 well No No

1 1 Onsite Offsite 0 0 0 0 0 Yes Soil No No Yes Yes

340 1 1 Offsite Offsite 1 1 1 0 0 Yes Clay No 340 wells No No

5 1 0 Onsite Onsite 1 0 0 1 1 Yes Clay Partial No No No

1 0 Onsite Onsite 0 0 0 0 0 Yes No No No No No

1 0 Onsite no 0 0 0 0 0 Yes Partial No No No No

15 1 0 no Onsite 1 0 0 1 0 Yes LLDPE No No No No

1 0 no Onsite 0 0 0 0 0 No information

1 0 Onsite Onsite 0 0 0 0 0 No information

0 0 no no 0 0 0 0 0 No information

0 0 no no 0 0 0 0 0 No

1 0 no Onsite 0 0 0 0 0 Yes No No No No No

1 0 no Onsite 0 0 0 0 0 No

1 0 Onsite no 0 0 0 0 0 No

0 0 no no 0 0 0 0 0 No
1 0 no Onsite 0 0 0 0 0 No information

EPA-HQ-RCRA-2009-0640-DRAFT-0346.xls - 54 Groundwater Cases Page 21 of 27 Natural Resource Technology, Inc.54 proven and potential coal ash cases with groundwater impacts displayed in this spreadsheet

Oil ash and surface water cases are not displayed here

Site Name Xcel Energy/Southern Minnesota Municipal Power Agency - Sherburne County (Sherco) Generating Plant Becker, Minnesota Alliant Rock River Ash Disposal Facility, W isconsin Michigan City Site, Michigan City, Indiana Bailly Generating Station, Indiana Alliant Edgewater 1-4 Ash Disposal Site, W isconsin Wi sconsin Power Supply Company (W PSC) Pulliam Ash Disposal Site, Wi sconsin Central Illinois Light Co. Duck Creek Station , Illinois

Illinois Power Company Hennepin Power Station Illinois

Illinois Power Company Havanna Power Plant, Illinois Dairyland Power Alma On-Site Fly Ash Landfill, W isconsin Dairyland Power Alma Off-Site Fly Ash Landfill, W isconsin

Illinois Power Vermillion Power Station, Illinois

Central Illinois Public Service Company Hutsonville Power Station, Illinois
Illinois Power Company W ood River Power Station, Illinois
R.M. Schahfer Generating Station, IN
Coffeen/W hite & Brewer Trucking Fly Ash Landfill, Illinois

Southern Indiana Gas and Electric Company (SIGECO) A.B. Brown Generating Station, Indiana Number of Potential Receptors Any

Exceedance Offsite

Exceedance? MCL

Exceedance? Other

Exceedance? Receptor &

Exceedance Receptor &

Offsite Receptor &

Offsite MCL Receptor &

Onsite Receptor &

Onsite MCL Remediation

Performed Cap CCP Removal Alt. GW Supply GW Extraction Barrier W all

1 0 no Onsite 0 0 0 0 0 No information

1 0 Onsite Onsite 0 0 0 0 0 Yes Soil No No No No

1 0 Onsite no 0 0 0 0 0 No information

20 1 1 Onsite Offsite 1 1 0 0 1 Yes No Yes No No No

20 1 0 no Onsite 1 0 0 1 0 Yes Clay No No No No

1 0 no Onsite 0 0 0 0 0 Yes Soil No No No No

0 0 no no 0 0 0 0 0 Pending

1 0 no Onsite 0 0 0 0 0 Yes No No No No No

1 0 no Onsite 0 0 0 0 0 Yes Soil No No No No
1 0 no Onsite 0 0 0 0 0 Yes Clay No No No No
6 1 0 no Onsite 1 0 0 1 0 Yes Clay No No No No

0 0 no no 0 0 0 0 0 No

1 0 no Onsite 0 0 0 0 0 Pending HDPE No No Yes No

1 0 no Onsite 0 0 0 0 0 Yes No Yes No No No

1 0 Onsite Onsite 0 0 0 0 0 Yes Geomembrane No No No No

1 0 Onsite Onsite 0 0 0 0 0 Yes Clay No No No No

1 1 0 Onsite Onsite 1 0 0 1 1 Yes No No No No Yes

EPA-HQ-RCRA-2009-0640-DRAFT-0346.xls - 54 Groundwater Cases Page 22 of 27 Natural Resource Technology, Inc.54 proven and potential coal ash cases with groundwater impacts displayed in this spreadsheet

Oil ash and surface water cases are not displayed here

Site Name
Cincinnati Gas & Electric Co. Miamiview

Landfill, Ohio Indiana Power & Light Petersburg Generating Station, Indiana Hoosier Energy Merom Generating Station Coal Combustion W aste Landfill, Indiana

Cinergy W .C. Beckjord Station, Ohio

Lemberger Landfill, W isconsin

Conesville Fixed FGD Sludge Landfill, Ohio Muscatine County Landfill, Iowa
Dave Johnston Power Plant, Wyoming

Montana-Dakota Utilities R.M. Heskett Station, North Dakota
Arizona Public Service Co. Cholla Steam Electric Generating Station, Arizona Number of Potential Receptors Any

Exceedance Offsite

Exceedance? MCL

Exceedance? Other

Exceedance? Receptor &

Exceedance Receptor &

Offsite Receptor &

Offsite MCL Receptor &

Onsite Receptor &

Onsite MCL Remediation

Performed Cap CCP Removal Alt. GW Supply GW Extraction Barrier W all

1 0 no Onsite 0 0 0 0 0 Yes Clay No No No No
0 0 no no 0 0 0 0 0 No

1 0 Onsite Onsite 0 0 0 0 0 Yes Soil No No See Notes No

30 1 0 Onsite Onsite 1 0 0 1 1 Yes No No No Yes No

23 0 0 no no 0 0 0 0 0 Yes Yes No No Yes Yes

1 0 Onsite Onsite 0 0 0 0 0 Yes Clay No No No No
8 1 0 no Onsite 1 0 0 1 0 No information

0 0 no no 0 0 0 0 0 No information

2 1 0 Onsite Onsite 1 0 0 1 1 Yes Clay No No No No

0 0 no no 0 0 0 0 0 No information

EPA-HQ-RCRA-2009-0640-DRAFT-0346.xls - 54 Groundwater Cases Page 23 of 27 Natural Resource Technology, Inc.54 proven and potential coal ash cases with groundwater impacts displayed in this spreadsheet

Oil ash and surface water cases are not displayed here

Site Name

Salem Acres Site (Massachusetts Electric Company)

City of Beverly/Vitale Brothers Fly Ash Pit (New

England Electric)

Don Frame Trucking, Inc. Fly Ash Landfill (Niagara Mohaw k)

Virginia Electric Power Co. (VEPCO) Possum Point

PEPCO Morgantown Generating Station Faulkner Off-site Disposal Facility

Virginia Power Yorktown Power Station Chisman Creek Disposal Site

South Carolina Electric & Gas Canadys Plant, South Carolina

Dairy Power Cooperative E.J. Stoneman Generating Station Ash Disposal Pond, W isconsin

WE PCO Highway 59 Landfill, Wi sconsin

Alliant (Formerly W isconsin Power & Light) Nelson Dewey Ash Disposal Facility, W isconsin Remedial Activities Mitigation Notes Approximately 11,000 cubic yards of fly ash removed from the site in 1995 and about 1,000 cubic yards of fly ash from the adjacent wetland in 1999. Interim remedial actions in the 1980s included capping the wastes and constructing slurry walls. Remediat 235-acre landfill w ith a small fly ash pile; listed on NPL for contaminated sludge ponds, but these contained other wastes. Removed from NPL list in 2001.

Fly ash removed, site redesigned to protect wetlands Fly ash migrated dow n a stream to W enham Lake, and was reportedly removed. No water quality exceedances reported at the water treatment plant that draws from the lake. Closure request submitted in 2007 A water supply well was abandoned and the building connected to a public wa ter supply. It is reported that the NY State Department of Environmental Conservation (NYSDEC) required the landfill be capped w ith 10-7 clay Solids were dredged from the unlined pond and placed in a second lined facility. Remedial measures at the site included closure and capping of older units (1996), installation of liners in newer units (1993), installation of a slurry wall to prevent ground water migration (1994), and rehabilitation of a portion of a stream (1995).
Remediation included a groundwater collection and treatment system, construction of a low-permeability soil cap, a soil cover, alternate water supply for 55 nearby homes, and relocating a portion of the tributary.
About 80% of the ash was mined from the pond for beneficial reuse, and a slurry wall was installed in 1996. A dewatering system was added in 2007. A slurry wall was also constructed at the pond that replaced the pond that is subject of the damage case report.

Discontinued use; installed cover (1- foot clay, 1 foot sand, and 6-inch topsoil) in 1989. Consolidated ash to 10-acre area away from residences. Replaced village well and provided village water to affected residences. Saturated ash excavation and placement of a PVC cap over the landfill completed in 2000/2001. Alternative drinking water source (municipal water supply) was provided to approximately 10 homes and our commercial buildings. Coal ash was removed from a one-acrea area w here it was known to be placed below water table.

Capping began in 1997 Changed to dry ash disposal in 1996.

EPA-HQ-RCRA-2009-0640-DRAFT-0346.xls - 54 Groundwater Cases Page 24 of 27 Natural Resource Technology, Inc.54 proven and potential coal ash cases with groundwater impacts displayed in this spreadsheet

Oil ash and surface water cases are not displayed here

Site Name

WE PCO Cedar-Sauk Landfill, Wi sconsin

Wi sconsin Electric Power Co. (W EPCO) Port W ashington Facility, Wi sconsin (Druecker) Lansing Board of W ater & Light (LBW L) North Lansing Landfill, Michigan
Northern Indiana Public Service Corp. (NIPSCO) Yard 520 Landfill Site (Brown's Landfill) Tow nship of Pines, Porter County, IN

Basin Electric Power Cooperative W. J. Neal Station Surface Impoundment, North Dakota Cooperative Power Association/United Power Coal Creek Station Surface Impoundments, North Dakota K.R. Rezendes South Main Street Ash Landfill, Freetown, Massachusetts AES Creative Resources W eber Ash Disposal Site, New

York Central Hudson Gas and Electric Corporation Danskammer W aste Management Facility, New York C.R. Huntley Fly ash Landfill, New York Elrama Plant, Pennsylvania Tennessee Valley Authority W idow s Creek Fossil Fuel Plant, Alabama
Tennessee Valley Authority Colbert Fossil Fuel Plant, Alabama
Duke Power Allen Steam Generating Plant, North Carolina Cinergy East Bend Scrubber Sludge Landfill, Kentucky Florida Power and Light Lansing Smith Plant, Florida Commonwealth Edison Powerton Plant - Mahoney Landfill, Pekin, Tazewell County, Illinois Remedial Activities Mitigation Notes A clay barrier cap was placed over the site in 1982, a groundwater extraction system was operated at the site from 1984 until 1997. The cap was upgraded to w ith a geosynthetic material (30-mil PVC) and an upper drainage layer in 1997. Site Capped. One water supply replaced. Contaminated private well was located about 250 feet from fill area. Slurry wall with gradient control system. Soil cap planned but not constructed as of 2009. Remediation system for an adjacient superfund site appears to be capturing dow ngradient plume. Site is in urban area serviced by municipal water; no potable wells within one mile. Alternative groundwater supplies provided between 2003 and 2005. In 2006/2007, both portions of the landfill we re capped with 2-feet of clay covered by topsoil, in accordance w ith IDEM requirements. In 1990, ash was consolidated to a 22- acre footprint and then capped w ith 18- inch engineered clay cover and an 18- inch layer of top soil, w hich was seeded and mulched. 8/31/95 report - As attributable to landfill, but Cd, Cu, Pb in city we ll not tied to site (Zn also in city well). Also, USEPA Reg. VIII Rem Site Ass Decision (3-3-00) stated no Assessment required The ponds were relined with a composite geosynthetic/clay liners between 1987 and 1993. A partial cap of unknow n design is reported for this site. MADEP reportedly required additional site monitoring wells and surface water sampling w hen the monitoring program was modified. The property ow ner is currently proposing to build a retail complex over the site. Closed and capped in 2001. Cap features a 60-mil LLDPE barrier between 120 mil geotextile layers.

The only source of information identified for this facility was the 1988 Report to Congress
Exceedance was reportedly in an ungradient well. Remediation listed is for metal cleaning wa ste basin: discontinued using small pond (which is not an ash impoundment) for acid cleaning in 1990s. Have abandoned know n leaking ponds and put in clay liner to catch coal pile runoff The damage case report is based either on concentrations near a 2-acre, clay-lined basin used to store metal cleaning wastes or a we ll screened in coal ash; inclusion of this facility as a damage case on this basis is questionable. Regardless, monitoring This facility does not appear to belong on the damage case list based on low

ash indicator concentrations in groundwater. Installed seepage collection to address seeps in some areas around landfill. The damage case attributed groundwater issues at this facility to the scrubber sludge landfill but a follow-up assessment performed by the utility identified the impoundment as the source of the issues. Groundwater is locally saline at depth The only source of information identified for this facility was the 1988 Report to Congress

EPA-HQ-RCRA-2009-0640-DRAFT-0346.xls - 54 Groundwater Cases Page 25 of 27 Natural Resource Technology, Inc.54 proven and potential coal ash cases with groundwater impacts displayed in this spreadsheet

Oil ash and surface water cases are not displayed here

Site Name Xcel Energy/Southern Minnesota Municipal Power Agency - Sherburne County (Sherco) Generating Plant Becker, Minnesota Alliant Rock River Ash Disposal Facility, W isconsin Michigan City Site, Michigan City, Indiana Bailly Generating Station, Indiana Alliant Edgewater 1-4 Ash Disposal Site, W isconsin Wi sconsin Power Supply Company (W PSC) Pulliam Ash Disposal Site, Wi sconsin Central Illinois Light Co. Duck Creek Station , Illinois

Illinois Power Company Hennepin Power Station Illinois

Illinois Power Company Havanna Power Plant, Illinois Dairyland Power Alma On-Site Fly Ash Landfill, W isconsin Dairyland Power Alma Off-Site Fly Ash Landfill, W isconsin

Illinois Power Vermillion Power Station, Illinois

Central Illinois Public Service Company Hutsonville Power Station, Illinois
Illinois Power Company W ood River Power Station, Illinois
R.M. Schahfer Generating Station, IN
Coffeen/W hite & Brewer Trucking Fly Ash Landfill, Illinois

Southern Indiana Gas and Electric Company (SIGECO) A.B. Brown Generating Station, Indiana Remedial Activities Mitigation Notes

The only source of information identified for this facility was the 1988 Report to Congress Landfill capping began 2004 and finished 2007, included 2 feet of soil wi th 6-inch topsoil cover. Plant converted to natural gas in 2000

In 1978, the impoundments were dredged, then lined w ith HDPE over clay There are also two small landfills on site that do not appear th be the basis of the damage case assessment, both landfills are closed and capped. Landfill closed w ith clay cap in 1986 after construction of a new , upgraded landfill.

removed from service and replaced wi th lined facility.
The impoundments were removed from service and dewatered in 1996. Ash is now sluiced to a lined coal ash impoundment. There were two seperate unlined impoundments at this site. Concentrations of boron and sulfate at the 38-acre east impoundment rapidly decreased in most monitoring wells after the facility was dewatered. Concentrations have decreased more slowly at the
The impoundment was capped with native soils in 1994. Ash is now sluiced to a lined coal ash impoundment. Site closure obtained in 2009. There are no groundwater quality exceedances associated w ith the lined impoundment. 2-foot clay cap w ith 6-inch topsoil cover placed on the landfill in 1986. Ash is now placed in a facility with a synthetic liner and a leachate collection system Ash was originally slurried to the landfill.

Constructed over a shale bedrock unit w hich has very low hydraulic conductivity; slurry walls inside the berms, built at time of construction, are keyed into the bedrock. Facility is in an area of extensive former coal mining activity. The utility is planning construction of a synthetic cap and a trench to intercept impacted groundwater. In 1997-1998, ash was excavated from two unlined cells and lined cells were constructed in those areas. In 1999 the plant converted to a dry ash handling system and most ash is reportedly sold for beneficial reuse.
Site reclosed in 1998/1999 w ith membrane cap Built new landfill cell (1997) w ith composite liner and leachate collection system Cells A-D were capped from 1980 to 1990, Cell E was capped in 1997. Caps consist of 3 feet of clay w ith hydraulic conductivity of 10-7 cm/s. No aquifer at this site. Groundwater monitored in clay or sand seams. Slurry wall was installed in the NE corner of the original landfill in late 1987. Groundwater pumps have been installed in two wells in the NE corner for the last 10 years.

EPA-HQ-RCRA-2009-0640-DRAFT-0346.xls - 54 Groundwater Cases Page 26 of 27 Natural Resource Technology, Inc.54 proven and potential coal ash cases with groundwater impacts displayed in this spreadsheet

Oil ash and surface water cases are not displayed here

Site Name
Cincinnati Gas & Electric Co. Miamiview

Landfill, Ohio Indiana Power & Light Petersburg Generating Station, Indiana Hoosier Energy Merom Generating Station Coal Combustion W aste Landfill, Indiana

Cinergy W .C. Beckjord Station, Ohio

Lemberger Landfill, W isconsin

Conesville Fixed FGD Sludge Landfill, Ohio Muscatine County Landfill, Iowa
Dave Johnston Power Plant, Wyoming

Montana-Dakota Utilities R.M. Heskett Station, North Dakota
Arizona Public Service Co. Cholla Steam Electric Generating Station, Arizona Remedial Activities Mitigation Notes
Closed and capped in 1996

Area 2 was constructed with an underdrain to intercept in-flow ing perched GW ; the company also installed a toe-drain at Area 1 to intercept perched GW seeping from landfill. Modified ash hauling methods in Area 2 to prevent incidental ash to a perimeter ditch. There are two ash landfills at this site, Area 1 is a closed 101 acre site constructed in 1982, and Area 2A is an active 89 acre site constructed in 1994 w hich will soon be replaced by a new landfill that w ill also have a liner and underdrain system. The Ash sluicing ceased in 1985. Interceptor well installed 1993 toprohibit sulfate plume from reaching offsite public supply wells. The one public supply well that was located on-site has been abandoned. The receptor count includes a municipal water supply well field.

Remediation completed by September 1996 and included wastes relocation; landfill capping; slurry wall construction; leachate collection and groundwater treatment system installations; and implementing groundwater monitoring and use restrictions. Former gravel pit, was used as an open dump from 1940 to 1970. In 1976 and 1977, an estimated 1,750 to 2,500 cubic yards of fly ash was transported to the site monthly and used as daily cover.

2-foot clay cap w ith 6-inch topsoil cover placed on the landfill in 1988.

The only source of information identified for this facility was the 1988 Report to Congress Site was closed and capped in 1989/1990. Clay cap constructed per North Dakota Department of Health guidance, and cap re vegetated in 1990. Rural water supplies provided to the only two landowners within 1/4 mile of the site.
Shallow groundwater in area reportedly has low quality due to natural causes.

EPA-HQ-RCRA-2009-0640-DRAFT-0346.xls - 54 Groundwater Cases Page 27 of 27 Natural Resource Technology, Inc.