Current FA Jobsite List Site City State First Exposure Abitibi Consolidated Paper Mill / Champion International Corp. Lufkin TX 1/1/1965 ALCOA (Aluminum Co. of America) Newburgh IN 1/1/1983 ALCOA (Aluminum Co. of America) Point Comfort TX 1/1/1962 ALCOA (Aluminum Co. of America) Rockdale TX 1/1/1954 Allied Chemical Plant / McCarthy Winnie TX 1/1/1956 Ameirpol-Synpol / Texas U.S. Chemical / Texas Butadiene / Texaco Chemical Port Neches TX 1/1/1954 Corp. (North Plant) American Norit (see also Darco) Marshall TX 1/1/1957 Ameripol-Synpol / B.F. Goodrich Orange TX 1/1/1957 Ameripol-Synpol / B.F. Goodrich / Michelin USA (South Plant) Port Neches TX 1/1/1954 AMOCO (American Oil Co.) / Standard Oil Co. Alvin TX 1/1/1960 AMOCO (American Oil Co.) / Standard Oil Co. Angleton TX 1/1/1966 AMOCO (American Oil Co.) / Standard Oil Co. Mandan ND 1/1/1952 AMOCO (American Oil Co.) / Standard Oil Co. - Chocolate Bayou Angleton TX 1/1/1966 AMOCO (American Oil Co.) / Standard Oil Co. / Pan American Refinery Texas City TX 1/1/1956 Andrews Gas Plant Andrews TX 1/1/1952 Anheuser - Busch Houston TX 1/1/1983 ARCO (Atlantic Richfield Company) / Sinclair / Atlantic Richfield Corpus Christi TX 1/1/1951 ARCO (Atlantic Richfield Company) / Sinclair / Atlantic Richfield Freeport TX 1/1/1985 ARCO (Atlantic Richfield Company) / Sinclair / Atlantic Richfield Houston TX 1/1/1967 ARCO (Atlantic Richfield Company) / Sinclair / Atlantic Richfield Pasadena TX 1/1/1955 ARCO (Atlantic Richfield Company) / Sinclair / Atlantic Richfield Pledger TX 1/1/1952 ARCO (Atlantic Richfield Company) / Sinclair / Atlantic Richfield Sinclair WY 1/1/1964 Asamera Oil Commerce City CO 1/1/1980 Atlantic Gas Plant Riverton WY 1/1/1963 Atlantic Oil / O.L. Olsen Co. Atlanta TX 1/1/1959 Atlantic Oil / O.L. Olsen Co. Sheridan TX 1/1/1956 Atlas Refining / Penzoil Shreveport LA 1/1/1955 Avondale Shipyard Morgan City LA 1/1/1967 B.F. Goodrich / Ameripol-Synpol Orange TX 1/1/1957 B.F. Goodrich / Ameripol-Synpol / Michelin USA (South Plant) Port Neches TX 1/1/1954 Badget America, Inc. Mt. Vernon IN 1/1/1985 Badische Chemical Plant (see also Dow Badische) Freeport TX 1/1/1970 BASF / Dow Badische / Badische Chemical / Dow Chemical Freeport TX 1/1/1955 Bates Power Plant / Central Power and Light Mission TX 1/1/1958 Big Three Industries, Inc. Nederland TX 1/1/1963 BIT International / Cities Services Copperhill TN 1/1/1972 Bridgestone Tire and Rubber / Firestone Synthic Rubber and Latex Co. Lake Charles LA 1/1/1948 Bridgestone Tire and Rubber / Firestone Synthic Rubber and Latex Co. Orange TX 1/1/1960 Brookshire High School Brookshire TX 1/1/1947 Brown & Root Konawa OK 1/1/1973 Brown Shipyard Houston TX 1/1/1965 Cameron Iron Works / Cooper Cameron Corp. / WKM Valves / WKM Industries Houston TX 1/1/1960 CanadianOxy Offshore Production Co. (see also Cities Services) Lake Charles LA 1/1/1945 Celanese Chemical Plant Bay City TX 1/1/1966 CenterPoint Energy (see also Houston Lighting & Power Company) Houston TX 1/1/1965 Central Louisiana Electric St. Landry LA 1/1/1967 Central Louisiana Electric Plant Plaquemine LA 1/1/1966

Tuesday, May 20, 2008 Page 1 of 9 Site City State First Exposure Central Power and Light / Bates Power Plant Mission TX 1/1/1958 Champion International Corp. (see also Champion Paper Co.) Houston TX 1/1/1960 Champion International Corp. (see also Champion Paper Co.) Pasadena TX 1/1/1971 Champion International Corp. (see also Champion Paper Co.) / Abitibi Lufkin TX 1/1/1965 Consolidated Paper Champion Paper Co./ U.S. Plywood/ Int~l Paper/ Champion Int~l Corp./ Southland Houston TX 1/1/1960 Paper Mills, Inc/ St. Regis Pulp/ Paper Corp. Champion Paper Co./ U.S. Plywood/ Int~l Paper/ Champion Int~l Corp./ Southland Lufkin TX 1/1/1965 Paper Mills, Inc/ St. Regis Pulp/ Paper Corp. Champion Paper Co./ U.S. Plywood/ Int~l Paper/ Champion Int~l Corp./ Southland Pasadena TX 1/1/1971 Paper Mills, Inc/ St. Regis Pulp/ Paper Corp. Charter Oil Refinery Houston TX 1/1/1975 Chevron / Gulf Oil Baytown TX 1/1/1967 Chevron / Gulf Oil Hobbs NM 1/1/1960 Chevron / Gulf Oil Mount Belvieu TX 1/1/1967 Chevron / Gulf Oil Port Arthur TX 1/1/1952 Chevron / Gulf Oil Vidor TX 1/1/1976 Chevron / Gulf Oil Weatherford TX 1/1/1968 Chevron / Pure Oil / Union Oil / Unocal Lemont IL 1/1/1968 CitCon (see also Cities Services) Lake Charles LA 1/1/1945 Citgo Petroleum (see also Cities Services) Lake Charles LA 1/1/1950 Cities Public Service San Antonio TX 1/1/1974 Cities Service Plant Big Lake TX 1/1/1961 Cities Services Blackwell OK 1/1/1959 Cities Services / BIT International Copperhill TX 1/1/1972 Cities Services/CS Refining/CS Petro/ PCI/ PCD/CitCon/Colmbn Lake Charles LA 1/1/1945 Carbon/OxyOil&Gas/OxyUSA/CanOxyOffshr Prod/Occ~l Chem./O~chem Petro) Columbian Carbon Company (see also Cities Services) Lake Charles LA 1/1/1945 CONOCO (Continental Oil) Commerce City CO 1/1/1980 CONOCO (Continental Oil) Grand Junction CO 1/1/1963 CONOCO (Continental Oil) Lake Charles LA 1/1/1948 CONOCO (Continental Oil) Rio Grande City TX 1/1/1950 CONOCO (Continental Oil) / United Gas Pipeline Carthage TX 1/1/1950 Cooper Cameron Corp. / Cameron Iron Works / WKM Valves / WKM Industries Houston TX 1/1/1960 Cosdon Refinery / Fina (Purchased by Fina in 1963) Big Springs TX 1/1/1968 Crosby Chemical Co. DeRidder LA 1/1/1955 Crown Central Petroleum Pasadena TX 1/1/1960 CS Petroleum (see also Cities Services) Lake Charles LA 1/1/1945 CS Refining Corp. (see also Cities Services) Lake Charles LA 1/1/1945 Dallas Power and Light Garland TX 1/1/1969 Darco / ICI / Norit America / Zeneca Marshall TX 1/1/1957 Dart Industries / Huntsman Polymers / Rexall Drug Chemical / El Paso Natural Odessa TX 1/1/1963 Gas / El Paso Products / El Paso Polyolefins / Rexene Denka Refinery / Petrotex Houston/Pasadena TX 1/1/1961 Diamond Alkaline / Diamond Shamrock Beaumont TX 1/1/1975 Diamond Alkaline / Diamond Shamrock / Occidental Chemical Greens Bayou / Channel TX 1/1/1968 Diamond Shamrock / Diamond Alkaline Beaumont TX 1/1/1975 Diamond Shamrock / Occidental Chemical / Diamond Alkaline Greens Bayou / Channel TX 1/1/1968 Dow Badische / Badische Chemical / Dow Chemical / BASF Freeport TX 1/1/1955 Dow Badische Chemical Plant Clute TX 1/1/1966 Dow Chemical Plaquemine LA 1/1/1958 Dow Chemical (see also Dow Badische) Freeport TX 1/1/1955

Tuesday, May 20, 2008 Page 2 of 9 Site City State First Exposure Dupont Beaumont Works Beaumont TX 1/1/1962 Dupont Chemical / Dupont Sabine Works Orange TX 1/1/1972 Dupont Sabine Works / Dupont Chemical Orange TX 1/1/1972 Duvall Sulpher / Pennziol West Texas TX 1/1/1960 Eastern States Refinery Houston TX 1/1/1968 El Paso Natural Gas / El Paso Products / El Paso Polyolefins / Rexene / Dart Odessa TX 1/1/1963 Industries / Huntsman Polymers / Rexall Drug Chemical El Paso Polyolefins / Rexene / Dart Industries / Huntsman Polymers / Rexall Drug Odessa TX 1/1/1963 Chemical / El Paso Natural Gas / El Paso Products El Paso Products / El Paso Polyolefins / Rexene / Dart Industries / Huntsman Odessa TX 1/1/1963 Polymers / Rexall Drug Chemical / El Paso Natural Gas Ethyl Refinery (a.k.a. Ethyl-Dow) Pasadena TX 1/1/1970 Ethyl-Dow (a.k.a. Ethyl Refinery) Pasadena TX 1/1/1970 Exxon / Humble Baytown TX 1/1/1964 Exxon / Humble Charlotte TX 1/1/1950 Exxon / Humble Conroe TX 1/1/1949 Exxon / Humble Genoa TX 1/1/1949 Exxon / Humble Houston TX 1/1/1957 Exxon / Humble Jourdanton TX 1/1/1949 Exxon / Humble Katy TX 1/1/1949 Exxon / Humble Kilgore TX 1/1/1947 Exxon / Humble King Ranch TX 1/1/1960 Exxon / Humble Kingsville TX 1/1/1960 Exxon / Humble Longview TX 1/1/1947 Exxon / Humble Opelousas LA 1/1/1959 Exxon / Humble Quitman TX 1/1/1947 Exxon / Humble Tomball TX 1/1/1954 Exxon / Humble - King Ranch Premont TX 1/1/1960 Federal Steel Houston TX 1/1/1960 Firestone Synthetic Rubber and Latex Co. / Bridgestone Tire and Rubber Lake Charles LA 1/1/1948 Firestone Synthetic Rubber and Latex Co. / Bridgestone Tire and Rubber Orange TX 1/1/1960 Fish Engineering Corp. / Tidewater Oil Co. Eagle Lake TX 1/1/1956 Fish Engineering Corp. / Tidewater Oil Co. Houma LA 1/1/1958 Fish Engineering Corp. / Tidewater Oil Co. Nordhelm TX 1/1/1955 Fish Engineering Corp. / Tidewater Oil Co. Normana TX 1/1/1962 Fish Engineering Corp. / Tidewater Oil Co. Palestine TX 1/1/1958 Fish Engineering Corp. / Tidewater Oil Co. Winnsboro TX 1/1/1956 Ford Plant Houston TX 1/1/1947 Foundry / Lufkin Industries Lufkin TX 1/1/1970 Frontier Refinery/Husky Oil Cheyene WY 1/1/1980 Fuller-Austin Insulation Co. 1946-1974 Not Specified 1/1/1946 Fuller-Austin Insulation Co. after 1974 Not Specified 1/1/1975 GAF Corporation Texas City TX 1/1/1980 Gas Plant Atlanta TX 1/1/1963 Gas Plant Big Lake TX 1/1/1962 Gas Plant Crowley LA 1/1/1950 Gas Plant Kermit TX 1/1/1962 Gas Plant Markham TX 1/1/1952 Gas Plant Odessa TX 1/1/1962 Gas Plant Opelousas LA 1/1/1949 Gas Plant outside Charleston WV 1/1/1965

Tuesday, May 20, 2008 Page 3 of 9 Site City State First Exposure Gas Plant Ponco City OK 1/1/1965 Gas Plant Port Acres TX 1/1/1966 Gas Plant Vanderbilt TX 1/1/1948 Gas Plant Ywchoski LA 1/1/1964 Gas Processors Rock Springs WY 1/1/1963 Gas Refinery Gainesville FL 1/1/1962 Gasoline Plant Tioga ND 1/1/1953 Gladewater Refinery Gladewater TX 1/1/1950 Goodyear Tire & Rubber Company Beaumont TX 1/1/1968 Goodyear Tire & Rubber Company Houston TX 1/1/1972 Great Southern Refinery Corpus Christi TX 1/1/1952 Grey Wolf Refinery Conroe TX 1/1/1948 Grey Wolf Refinery Pinehurst TX 1/1/1947 GSU / Gulf States Utilities / Nelson Station Lake Charles LA 1/1/1955 Gulf Goodrich Chemical / Warren Petroleum Mont Belvieu TX 1/1/1967 Gulf Goodrich Chemical / Warren Petroleum Vidor TX 1/1/1976 Gulf Oil / Chevron Baytown TX 1/1/1967 Gulf Oil / Chevron Hobbs NM 1/1/1960 Gulf Oil / Chevron Mont Belvieu TX 1/1/1967 Gulf Oil / Chevron Port Arthur TX 1/1/1952 Gulf Oil / Chevron Vidor TX 1/1/1976 Gulf Oil / Chevron Weatherford TX 1/1/1968 Gulf Oil Corp. / Procon Port Arthur TX 1/1/1982 Gulf States Utilities / GSU / Nelson Station Lake Charles LA 1/1/1955 Hi Grade Packing Galveston TX 1/1/1963 Houston Industries, Inc. (see also Houston Lighting & Power Company) Houston TX 1/1/1965 Houston Lighting & Power Company / Reliant Energy / CenterPoint Energy / Houston TX 1/1/1965 Houston Industries, Inc. Hudson Engineering Brookhaven MS 1/1/1952 Hudson Engineering Gas Plant Beaumont TX 1/1/1967 Humble / Exxon Baytown TX 1/1/1964 Humble / Exxon Charlotte TX 1/1/1950 Humble / Exxon Conroe TX 1/1/1949 Humble / Exxon Genoa TX 1/1/1949 Humble / Exxon Houston TX 1/1/1957 Humble / Exxon Jourdanton TX 1/1/1949 Humble / Exxon Katy TX 1/1/1949 Humble / Exxon Kilgore TX 1/1/1951 Humble / Exxon King Ranch TX 1/1/1960 Humble / Exxon Kingsville TX 1/1/1960 Humble / Exxon Longview TX 1/1/1947 Humble / Exxon Opelousas LA 1/1/1959 Humble / Exxon Quitman TX 1/1/1956 Humble / Exxon Tomball TX 1/1/1954 Humble / Exxon - King Ranch Premont TX 1/1/1960 Humble Refindery Billings MT 1/1/1962 Hunt Oil Jacksonville TX 1/1/1963 Hunt Oil Tioga ND 1/1/1962 Hunt Oil Co. Tuscaloosa AL 1/1/1958 Huntsman Corp. / Neches Butane / Texaco Chemical Port Neches TX 1/1/1966

Tuesday, May 20, 2008 Page 4 of 9 Site City State First Exposure Huntsman Polymers / Rexall Drug Chemical / El Paso Natural Gas / El Paso Odessa TX 1/1/1963 Products / El Paso Polyolefins / Rexene / Dart Industries Husky Oil/Frontier Refinery Cheyene WY 1/1/1980 Hydracarbon Gas Plant Brooker FL 1/1/1962 ICI (see also Darco) Marshall TX 1/1/1957 International Paper (see also Champion Paper Co.) Houston TX 1/1/1960 International Paper (see also Champion Paper Co.) Lufkin TX 1/1/1965 International Paper (see also Champion Paper Co.) Pasadena TX 1/1/1971 Jefferson Chemical Co. / Neches Butane / Texaco Chemical / Huntsman Corp. Port Neches TX 1/1/1966 Kansas Power Topeka KS 1/1/1954 Katy Gas Plant Katy TX 1/1/1955 Katy High School Katy TX 1/1/1947 King Ranch Gas Plant - Humble / Exxon Premont TX 1/1/1960 Koch Refinery / Suntide Refinery / Sun Oil / Sunoco Corpus Christi TX 1/1/1952 LaGloria Corp Premont TX 1/1/1953 LaGloria Refinery Falfurrias TX 1/1/1958 LaGloria Refinery Tyler TX 1/1/1951 LE Bus Manufacturing Longview TX 1/1/1974 LNG Plant Lake Charles LA 1/1/1981 Lon Hill Power Station Callallen TX 1/1/1959 Lone Star Steel Co. Dangerfield TX 1/1/1961 Lone Star Steel Co. Lone Star TX 1/1/1961 Looking Glass Project Moab UT 1/1/1964 Lower Colorado River Authority / Power Plant Bastrop TX 1/1/1967 Lubrizol Chemical Plant Pasadena TX 1/1/1966 Lufkin Industries / Foundry Lufkin TX 1/1/1970 Magnolia / Mobil Oil Augusta KS 1/1/1973 Magnolia / Mobil Oil Beaumont TX 1/1/1954 Magnolia / Mobil Oil Deer Park TX 1/1/1966 Magnolia / Mobil Oil Ferndale WA 1/1/1971 Magnolia / Mobil Oil Houston TX 1/1/1962 Magnolia / Mobil Oil Johnson Bayou LA 1/1/1958 Magnolia / Mobil Oil Premont TX 1/1/1952 Magnolia / Mobil Oil Snyder TX 1/1/1957 Magnolia / Mobil Oil Vanderbilt TX 1/1/1952 Marathon Refinery Texas City TX 1/1/1960 McCarthy Gas Plant / Allied Chemical Plant Winnie TX 1/1/1956 McMurrey Refinery Co. / Procon Tyler TX 1/1/1949 Merichem Channelview TX 1/1/1975 Merichem Chemical Plant Houston TX 1/1/1965 Michelin USA (South Plant) / Ameripol-Synpol / B.F. Goodrich Port Neches TX 1/1/1954 Mississippi Chemical Yazoo City MS 1/1/1967 Mobil / Magnolia Augusta KS 1/1/1973 Mobil / Magnolia Beaumont TX 1/1/1954 Mobil / Magnolia Deer Park TX 1/1/1966 Mobil / Magnolia Ferndale WA 1/1/1971 Mobil / Magnolia Houston TX 1/1/1962 Mobil / Magnolia Johnson Bayou LA 1/1/1958 Mobil / Magnolia Premont TX 1/1/1952 Mobil / Magnolia Snyder TX 1/1/1957

Tuesday, May 20, 2008 Page 5 of 9 Site City State First Exposure Mobil / Magnolia Vanderbilt TX 1/1/1952 Mobil / Socony Houston TX 1/1/1962 Monsanto / Pharmacia Corp. Chocolate Bayou TX 1/1/1969 Monsanto Chemical Co. / Sterling / Pharmacia Corp. Texas City TX 1/1/1967 Monsanto Enviro Chemical / Pharmacia Corp. Lake Charles LA 1/1/1980 Montana - Dakota Utilities Whitlash MO 1/1/1953 Montana - Dakota Utilities Gas Bridger WY 1/1/1951 Montana - Dakota Utilities Gas Plant Worland WY 1/1/1951 Montana-Dakota Utilities Meteetse WY 1/1/1953 Motiva Enterprises / Texaco / The Texas Company Port Arthur TX 1/1/1966 National Petrochemical Co. (USI) Deerpark TX 1/1/1962 Natural Gas Co. of America Woodlawn TX 1/1/1956 Neches Butane / Jefferson Chemical Co. / Texaco Chemical / Huntsman Corp. Port Arthur TX 1/1/1966 Nelson Station / GSU / Gulf States Utilities Lake Charles LA 1/1/1955 Norit America (see also Darco) Marshall TX 1/1/1957 O.L. Olsen Co. / Atlantic Oil Atlanta TX 1/1/1959 O.L. Olsen Co. / Atlantic Oil Sheridan TX 1/1/1956 Occidental Chemical (see also City Services) Lake Charles LA 1/1/1945 Occidental Chemical / Diamond Alkaline / Diamond Shamrock Greens Bayou / Channel TX 1/1/1968 Oil Field Heaters Coushotta LA 1/1/1950 Olin Corp. / Olin Mathieson Chemical Corp. Lake Charles LA 1/1/1963 Olin Mathieson Chemical Corp. / Olin Corp. Lake Charles LA 1/1/1963 Oxy Oil and Gas (see also Cities Services) Lake Charles LA 1/1/1945 Oxy USA (see also Cities Services) Lake Charles LA 1/1/1945 Oxychem Petrochemical (see also Cities Services) Lake Charles LA 1/1/1945 Pacific 66 Plant Taylor, British Columbia 1/1/1964 Pan American Refining / AMOCO (American Oil Co.) / Standard Oil Co. Texas City TX 1/1/1956 Paper Corp. (see also Champion Paper Co.) Houston TX 1/1/1960 Paper Corp. (see also Champion Paper Co.) Lufkin TX 1/1/1965 Paper Corp. (see also Champion Paper Co.) Pasadena TX 1/1/1971 PCD (see also Cities Services) Lake Charles LA 1/1/1945 PCD / PCI (see also Cities Services) Sulphur LA 1/1/1950 PCI (see also Cities Services) Lake Charles LA 1/1/1945 Pemex Storage Tanks Port Brownsville TX 1/1/1961 Penzoil / Atlas Refining Shreveport LA 1/1/1955 Penzoil / Duvall Sulpher West Texas TX 1/1/1960 Petrotex / Denka Refinery Houston TX 1/1/1961 Petrotex / Denka Refinery Pasadena TX 1/1/1963 Pharmacia / Monsanto Chocolate Bayou TX 1/1/1969 Pharmacia / Monsanto Chemical Company / Sterling Texas City TX 1/1/1967 Pharmacia / Monsanto Enviro Chemical Lake Charles LA 1/1/1980 Phillips Houston TX 1/1/1960 Phillips Plant Houston/Pasadena TX 1/1/1960 Phillips Refining - Old Ocean Sweeney TX 1/1/1950 Power Plant Baldwin LA 1/1/1972 Power Plant Bastrop LA 1/1/1969 Power Plant Corpus Christi TX 1/1/1967 Power Plant San Benito TX 1/1/1967 Power Plant / Lower Colorado River Authority Bastrop TX 1/1/1967

Tuesday, May 20, 2008 Page 6 of 9 Site City State First Exposure Powerhouse Pueblo CO 1/1/1972 PPG Industries Lake Charles LA 1/1/1947 Procon / Gulf Oil Corp. Port Arthur TX 1/1/1982 Procon / McMurray Refinery Co. Tyler TX 1/1/1949 Pure Oil / Union Oil / Unocal Moab UT 1/1/1964 Pure Oil / Union Oil / Unocal Mohave TX 1/1/1961 Pure Oil / Union Oil / Unocal / Chevron Chicago IL 1/1/1968 Pure Oil / Union Oil / Unocal / Chevron Chicago IL 1/1/1968 Pure Oil / Union Oil / Unocal / Chevron Lemont IL 1/1/1968 Pure Oil / Union Oil / Unocal Beaumont Terminal Nederland TX 1/1/1957 Reliant Energy (see also Houston Lighting & Power Company) Houston TX 1/1/1965 Rexall Drug Chemical / El Paso Natural Gas / El Paso Products / El Paso Odessa TX 1/1/1963 Polyolefins / Rexene / Dart Industries / Huntsman Polymers Rexene / Dart Industries / Huntsman Polymers / Rexall Drug Chemical / El Paso Odessa TX 1/1/1963 Natural Gas / El Paso Products / El Paso Polyolefins Rohm & Haas / String Drygood (Does not include R&H Bayport Plant in LaPorte, Deer Park TX 1/1/1965 TX - 1982) Sabine Industries Orange TX 1/1/1963 San Jacinto Gas Carthage TX 1/1/1965 San Jacinto Gas Port Arthur TX 1/1/1963 San Jacinto Gas Plant Port Acres TX 1/1/1963 Schlitz Brewery /Stroh Longview TX 1/1/1964 Sejita Gas Plant / Trinity Gas Sejita TX 1/1/1964 Shell Oil / Shell Chemical Atlanta TX 1/1/1962 Shell Oil / Shell Chemical Augusta GA 1/1/1964 Shell Oil / Shell Chemical Brownsville TX 1/1/1963 Shell Oil / Shell Chemical Deer Park TX 1/1/1965 Shell Oil / Shell Chemical Houma LA 1/1/1963 Shell Oil / Shell Chemical Houston TX 1/1/1950 Shell Oil / Shell Chemical Rio Grande City TX 1/1/1961 Shell Oil / Sheridan Gas Plant Sheridan TX 1/1/1956 Sheridan Gas Plant / Shell Oil Sheridan TX 1/1/1956 Siegco Plant Yankeetown IN 1/1/1982 Sigeco Plant Evansville IN 1/1/1982 Signal Oil Refinery Houston TX 1/1/1972 Sinclair (see also ARCO) Corpus Christi TX 1/1/1951 Sinclair (see also ARCO) Freeport TX 1/1/1985 Sinclair (see also ARCO) Houston TX 1/1/1967 Sinclair (see also ARCO) Pasadena TX 1/1/1955 Sinclair (see also ARCO) Pledger TX 1/1/1952 Sinclair (see also ARCO) Sinclair WY 1/1/1964 Socony / Mobil Houston TX 1/1/1962 Southern Pacific Railyard Houston TX 1/1/1975 Southern Petrochemical Plant Channelview TX 1/1/1969 Southland Paper Mills, Inc. (see also Champion Paper Co.) Houston TX 1/1/1960 Southland Paper Mills, Inc. (see also Champion Paper Co.) Lufkin TX 1/1/1965 Southland Paper Mills, Inc. (see also Champion Paper Co.) Pasadena TX 1/1/1971 Southwestern Refining Corpus Christi TX 1/1/1961 St. Regis Paper Co. (see also Champion Paper Co.) Houston TX 1/1/1960 St. Regis Paper Co. (see also Champion Paper Co.) Lufkin TX 1/1/1965 St. Regis Paper Co. (see also Champion Paper Co.) Pasadena TX 1/1/1971

Tuesday, May 20, 2008 Page 7 of 9 Site City State First Exposure Standard Oil Co. / AMOCO (American Oil Co.) Alvin TX 1/1/1960 Standard Oil Co. / AMOCO (American Oil Co.) Angleton TX 1/1/1966 Standard Oil Co. / AMOCO (American Oil Co.) Mandan ND 1/1/1952 Standard Oil Co. / AMOCO (American Oil Co.) - Chocolate Bayou Angleton TX 1/1/1966 Standard Oil Co. / AMOCO (American Oil Co.) / Pan American Refining Texas City TX 1/1/1956 Star Enterprise / Texaco Refining Port Arthur TX 1/1/1966 Stauffer Chemical Houston TX 1/1/1967 Stearns / Texaco City Refining, Inc. Rogers TX 1/1/1982 Sterling / Monsanto Chemical Co. Texas City TX 1/1/1967 String Drygood / Rohm & Haas (Does not include R&H Bayport Plant in LaPorte, Houston TX 1/1/1965 TX - 1982) Stroh / Schlitz Brewery Longview TX 1/1/1964 Sui Gas Plant Sui Desert, Pakistan 1/1/1955 Sun Oil / Sunoco / Suntide Refinery Corpus Christi TX 1/1/1952 Sun Oil / Sunoco / Suntide Refinery Delhi LA 1/1/1947 Sunoco / Suntide Refinery / Sun Oil Corpus Christi TX 1/1/1952 Sunoco / Suntide Refinery / Sun Oil Delhi LA 1/1/1947 Suntide Refinery / Koch Refinery / Sun Oil / Sunoco Corpus Christi TX 1/1/1952 Suntide Refinery / Sun Oil / Sunoco Delhi LA 1/1/1947 Superior Oil Co. Rayne LA 1/1/1957 Superior Oil Company Sabine Pass TX 1/1/1981 Taylor Refinery Corpus Christi TX 1/1/1951 Taylor Refinery Port Isabell TX 1/1/1948 Temple - Eastex / Temple-Inland Industries, Inc. Papermill Evadale TX 1/1/1955 Temple-Inland Industries, Inc. Papermill / Temple - Eastex Evadale TX 1/1/1955 Tenneco Deerpark TX 1/1/1960 Tenneco Milaca MN 1/1/1968 Tenneco Pasadena TX 1/1/1960 Tenneco St. Croix WI 1/1/1967 Tenneco Tupelo MS 1/1/1965 Tenneco Plant Palacios TX 1/1/1960 Tennessee Gas Palacios TX 1/1/1960 Tennessee Gas Plant Grand Chenier LA 1/1/1965 Tennessee Gas Plant McAllen TX 1/1/1966 Tenn-Tex Refinery Houston TX 1/1/1960 Texaco / The Texas Company El Paso TX 1/1/1953 Texaco / The Texas Company Encino TX 1/1/1974 Texaco / The Texas Company Houston TX 1/1/1957 Texaco / The Texas Company Texas City TX 1/1/1982 Texaco / The Texas Company / Motiva Enterprises Port Arthur TX 1/1/1966 Texaco Chemical / Neches Butane / Jefferson Chemical / Huntsman Corp. Port Neches TX 1/1/1966 Texaco Refining / Star Enterprise Port Arthur TX 1/1/1966 Texas Butadiene Channelview TX 1/1/1961 Texas City Refinery Texas City TX 1/1/1958 Texas Eastman Chemical Longview TX 1/1/1953 Texas Electric Service Ft. Worth TX 1/1/1969 Texgas Plant Winnie TX 1/1/1955 The California Co. Ft. St. Tolene LA 1/1/1948 The California Co. Rangley CO 1/1/1949 The Carthage Corp. Carthage TX 1/1/1954

Tuesday, May 20, 2008 Page 8 of 9 Site City State First Exposure The Texas Company / Texaco El Paso TX 1/1/1953 The Texas Company / Texaco Encino TX 1/1/1974 The Texas Company / Texaco Houston TX 1/1/1957 The Texas Company / Texaco Port Arthur TX 1/1/1966 The Texas Company / Texaco Texas City TX 1/1/1982 Thiokol Chemical Co. Karnack TX 1/1/1954 Tidewater Oil Co. / Fish Engineering Corp. Eagle Lake TX 1/1/1956 Tidewater Oil Co. / Fish Engineering Corp. Houma LA 1/1/1958 Tidewater Oil Co. / Fish Engineering Corp. Nordheim TX 1/1/1955 Tidewater Oil Co. / Fish Engineering Corp. Normanna TX 1/1/1962 Tidewater Oil Co. / Fish Engineering Corp. Palestine TX 1/1/1958 Tidewater Oil Co. / Fish Engineering Corp. Winnsboro TX 1/1/1956 Todd Shipyards Houston TX 1/1/1966 Transco Jackson MS 1/1/1965 Trinity Gas / Sejita Gas Plant Sejita TX 1/1/1964 Truckline Terminal Lake Charles LA 1/1/1981 U.S. Plywood (see also Champion Co.) Houston TX 1/1/1960 U.S. Plywood (see also Champion Co.) Pasadena TX 1/1/1971 U.S. Steel Houston TX 1/1/1960 Union Carbide Houston TX 1/1/1950 Union Carbide Seadrift TX 1/1/1954 Union Oil (see also Pure Oil) Chicago IL 1/1/1968 Union Oil (see also Pure Oil) Lemont IL 1/1/1968 Union Oil (see also Pure Oil) Moab UT 1/1/1964 Union Oil (see also Pure Oil) Mohave TX 1/1/1961 Union Oil (see also Pure Oil) Nederland TX 1/1/1957 United Gas Pipeline / CONOCO (Continental Oil) Carthage TX 1/1/1950 University of Texas Austin TX 1/1/1951 Unocal (see also Pure Oil) Chicago IL 1/1/1968 Unocal (see also Pure Oil) Lemont IL 1/1/1968 Unocal (see also Pure Oil) Moab UT 1/1/1964 Unocal (see also Pure Oil) Mohave TX 1/1/1961 Unocal Beaumont Terminal (see also Pure Oil) Nederland TX 1/1/1957 USI Deerpark TX 1/1/1962 W.R. Grace Lake Charles LA 1/1/1960 Warren Petroleum / Gulf Goodrich Chemical Mont Belvieu TX 1/1/1967 Warren Petroleum / Gulf Goodrich Chemical Vidor TX 1/1/1976 Warrick Generating Station Warrick IN 1/1/1983 WKM Valves / WKM Industries / Cameron Iron Works / Cooper Cameron Corp. Houston TX 1/1/1960 Zeneca (see also Darco) Marshall TX 1/1/1957

Tuesday, May 20, 2008 Page 9 of 9