| OMG INC | Steel Partners Holdings | Cobalt | 71.00 |
| IRWIN INDUSTRIAL TOOLS DBA LENOX TOOLS | Stanley Black & Decker | Chromium | 7.84 |
| PARADIGM MANCHESTER INC | Pursuit Aerospace | Chromium | 7.15 |
| PARADIGM MANCHESTER INC | Pursuit Aerospace | Chromium | 7.13 |
| SOLUTIA INC | Eastman Chemical | Formaldehyde | 5.46 |
| PARADIGM MANCHESTER INC | Pursuit Aerospace | Chromium | 5.20 |
| MACE ADHESIVES & COATINGS CO I NC | MACE ADHESIVES & COATINGS CO I NC | Chromium compounds (except for chromite ore mined in the Transvaal Region of South Africa and the unreacted ore component of the chromite ore processing residue (COPR). COPR is the solid waste remaining after aqueous extraction of oxidized chromite ore that has been combined with soda ash and kiln roasted at approximately 2,000 F.) | 4.87 |
| AVIENT COLORANTS USA LLC - HOLDEN FACILITY | Avient Corporation | Chromium compounds (except for chromite ore mined in the Transvaal Region of South Africa and the unreacted ore component of the chromite ore processing residue (COPR). COPR is the solid waste remaining after aqueous extraction of oxidized chromite ore that has been combined with soda ash and kiln roasted at approximately 2,000 F.) | 4.64 |
| ARCLIN SURFACES - EAST LONGMEADOW CO. | The Jordan Company | Formaldehyde | 3.07 |
| PREFERE MELAMINES LLC | One Rock Capital Partners | Formaldehyde | 3.04 |
| INNER-TITE CORP. | INNER-TITE CORP. | Chromium | 2.84 |
| IRWIN INDUSTRIAL TOOLS DBA LENOX TOOLS | Stanley Black & Decker | Cobalt | 2.22 |
| KOMTEK FORGE LLC | Crawford United | Chromium | 1.57 |
| METSO AUTOMATION USA INC | Valmet Oyj | Chromium | 1.50 |
| HYDROFERA LLC | Essity | Formaldehyde | 1.29 |
| MARMON INDUSTRIAL ENERGY & INFRASTRUCTURE GROUP | Berkshire Hathaway | Chromium | 1.25 |
| KOMTEK FORGE LLC | Crawford United | Nickel | 0.79 |
| PARADIGM MANCHESTER INC | Pursuit Aerospace | Nickel | 0.74 |
| PARADIGM MANCHESTER INC | Pursuit Aerospace | Nickel | 0.73 |
| PARADIGM MANCHESTER INC | Pursuit Aerospace | Nickel | 0.54 |
| MARMON INDUSTRIAL ENERGY & INFRASTRUCTURE GROUP | Berkshire Hathaway | Antimony compounds | 0.50 |
| BI-QEM INC. | BI-QEM INC | Formaldehyde | 0.47 |
| MARMON INDUSTRIAL ENERGY & INFRASTRUCTURE GROUP | Berkshire Hathaway | Lead compounds | 0.44 |
| WYMAN-GORDON CO | Berkshire Hathaway | Nickel | 0.42 |
| WYMAN-GORDON CO | Berkshire Hathaway | Chromium | 0.31 |
| PALMER FOUNDRY INC | PALMER FOUNDRY INC | Diisocyanates | 0.30 |
| IRWIN INDUSTRIAL TOOLS DBA LENOX TOOLS | Stanley Black & Decker | Nickel | 0.13 |
| WHITCRAFT LLC | Pursuit Aerospace | Chromium | 0.12 |
| MACE ADHESIVES & COATINGS CO I NC | MACE ADHESIVES & COATINGS CO I NC | Diisocyanates | 0.12 |
| BARNES AEROSPACE WINDSOR DIV | Barnes Group | Nickel | 0.11 |
| SOLENIS LLC | Platinum Equity | Epichlorohydrin | 0.11 |
| DONCASTERS STORMS FORGE | Doncasters | Chromium | 0.09 |
| CARDINAL HEALTH / KPR | Cardinal Health | Acrylic acid | 0.08 |
| HAZEN PAPER CO | HAZEN PAPER CO | Certain glycol ethers | 0.08 |
| TRELLEBORG COATED SYSTEMS US INC. | Trelleborg | N,N-Dimethylformamide | 0.07 |
| ROGERS CORP - WOODSTOCK | Rogers Corp. | Diisocyanates | 0.07 |
| TTM PRINTED CIRCUIT GROUP - STAFFORD DIV | TTM Technologies | Formaldehyde | 0.06 |
| METSO AUTOMATION USA INC | Valmet Oyj | Nickel | 0.06 |
| MARMON INDUSTRIAL ENERGY & INFRASTRUCTURE GROUP | Berkshire Hathaway | Nickel | 0.06 |
| VIBRAM CORP | VIBRAM USA | Diisocyanates | 0.05 |
| WYMAN-GORDON CO | Berkshire Hathaway | Nickel | 0.05 |
| DONCASTERS STORMS FORGE | Doncasters | Nickel | 0.02 |
| CALLAWAY GOLF BALL OPERATIONS INC | Callaway Golf | Diisocyanates | 0.02 |
| WHITCRAFT LLC | Pursuit Aerospace | Nickel | 0.01 |
| AHLSTROM-MUNKSJO NONWOVENS LLC | Bain Capital | Ammonia (includes anhydrous ammonia and aqueous ammonia from water dissociable ammonium salts and other sources; 10 percent of total aqueous ammonia is reportable under this listing) | 0.01 |
| OCEAN STATE POWER | LS Power | Ammonia (includes anhydrous ammonia and aqueous ammonia from water dissociable ammonium salts and other sources; 10 percent of total aqueous ammonia is reportable under this listing) | 0.01 |
| MARMON INDUSTRIAL ENERGY & INFRASTRUCTURE GROUP | Berkshire Hathaway | Ozone | 0.01 |
| ADHESIVE APPLICATIONS INC. - O'NEILL ST EASTHAMPTON | ADHESIVES APPLICATIONS INC | Ethylbenzene | 0.01 |
| RATHBONE PRECISION METALS INC | Calvi Holding | Nitric acid | 0.01 |
| SOLUTIA INC | Eastman Chemical | Vinyl acetate | 0.01 |
| HAZEN PAPER CO | HAZEN PAPER CO | n-Butyl alcohol (1-Butanol) | 0.01 |
| WESTFIELD ELECTROPLATING CO | WESTFIELD ELECTROPLATING CO | Nitric acid | 0.00 |
| ASTRO CHEMICALS INC | ASTRO CHEMICALS INC | Trichloroethylene | 0.00 |
| TTM PRINTED CIRCUIT GROUP - STAFFORD DIV | TTM Technologies | Certain glycol ethers | 0.00 |
| SAINT-GOBAIN ABRASIVES & SAINT -GOBAIN CERAMICS & PLASTICS | Saint-Gobain | Lead compounds | 0.00 |
| RPM WOOD FINISHES GROUP INC. | RPM International | Certain glycol ethers | 0.00 |
| LEWCOTT CORP D/B/A BARRDAY COMPOSITE SOLUTIONS | LEWCOTT CORP D/B/A BARRDAY COMPOSITE SOLUTIONS | Formaldehyde | 0.00 |
| PRYSMIAN CABLE & SYSTEMS LLC | Prysmian Group | Ozone | 0.00 |
| FLEXCON CO INC. | FLEXCON HOLDINGS TRUST | Xylene (mixed isomers) | 0.00 |
| OMG INC | Steel Partners Holdings | Lead | 0.00 |
| SAINT-GOBAIN ABRASIVES & SAINT -GOBAIN CERAMICS & PLASTICS | Saint-Gobain | Ammonia (includes anhydrous ammonia and aqueous ammonia from water dissociable ammonium salts and other sources; 10 percent of total aqueous ammonia is reportable under this listing) | 0.00 |
| O'CONNELL OIL NORTHAMPTON FACILITY | O'CONNELL OIL ASSOCIATES INC | Benzene | 0.00 |
| SAINT-GOBAIN ABRASIVES & SAINT -GOBAIN CERAMICS & PLASTICS | Saint-Gobain | Phenol | 0.00 |
| SHIELD PACKAGING CO INC | Shield Packaging Co. | Certain glycol ethers | 0.00 |
| ELEMENT MATERIALS TECHNOLOGY HARTFORD INC. | Temasek Holdings | Nitric acid | 0.00 |
| TURF CARE SUPPLY-HATFIELD PLANT | Platte River Equity | Manganese compounds | 0.00 |
| SAEILO ENTERPRISES | SAEILO ENTERPRISES INC | Lead | 0.00 |
| FLEXCON CO INC. | FLEXCON HOLDINGS TRUST | Vinyl acetate | 0.00 |
| SIMONIZ USA INC. | Syndet Products | Certain glycol ethers | 0.00 |
| TTM PRINTED CIRCUIT GROUP - STAFFORD DIV | TTM Technologies | Copper compounds (this category does not include copper phthalocyanine compounds that are substituted with only hydrogen, and/or chlorine, and/or bromine.) | 0.00 |
| SMITH & WESSON INC. | Smith & Wesson | Lead compounds | 0.00 |
| ASTRO CHEMICALS INC | ASTRO CHEMICALS INC | Dichloromethane (Methylene chloride) | 0.00 |
| RANDOLPH PRODUCTS CO | RANDOLPH PRODUCTS CO | Xylene (mixed isomers) | 0.00 |
| ADHESIVE APPLICATIONS INC. - O'NEILL ST EASTHAMPTON | ADHESIVES APPLICATIONS INC | Xylene (mixed isomers) | 0.00 |
| PREFERE MELAMINES LLC | One Rock Capital Partners | n-Butyl alcohol (1-Butanol) | 0.00 |
| TTM PRINTED CIRCUIT GROUP - STAFFORD DIV | TTM Technologies | Lead compounds | 0.00 |
| FLEXCON CO INC. | FLEXCON HOLDINGS TRUST | Toluene | 0.00 |
| MARMON INDUSTRIAL ENERGY & INFRASTRUCTURE GROUP | Berkshire Hathaway | Zinc compounds | 0.00 |
| INNER-TITE CORP. | INNER-TITE CORP. | Lead | 0.00 |
| MUSTANG MOTORCYCLE PRODUCTS LLC | MAG INC | Styrene | 0.00 |
| SAINT-GOBAIN ABRASIVES & SAINT -GOBAIN CERAMICS & PLASTICS | Saint-Gobain | Ethylene glycol | 0.00 |
| DAUPHINAIS CONCRETE | DAUPHINAIS CONCRETE INC | Lead | 0.00 |
| HOLDEN TRAP ROCK | MA BROKEN STONE CO | Polycyclic aromatic compounds | 0.00 |
| SHIELD PACKAGING CO INC | Shield Packaging Co. | Xylene (mixed isomers) | 0.00 |
| UNITED ABRASIVES INC | UNITED ABRASIVES INC | Phenol | 0.00 |
| SUPERCON INC | SUPERCON INC | Nitric acid | 0.00 |
| ASTRO CHEMICALS INC | ASTRO CHEMICALS INC | Ethylbenzene | 0.00 |
| ALGONQUIN POWER WINDSOR LOCKS LLC | Algonquin Power & Utilities | Ammonia (includes anhydrous ammonia and aqueous ammonia from water dissociable ammonium salts and other sources; 10 percent of total aqueous ammonia is reportable under this listing) | 0.00 |
| TRELLEBORG COATED SYSTEMS US INC. | Trelleborg | Toluene | 0.00 |
| PALL CORP | Danaher | Certain glycol ethers | 0.00 |
| DAUPHINAIS CONCRETE INC. | DAUPHINAIS CONCRETE INC | Lead | 0.00 |
| SYN-MAR PRODUCTS INC. | SYN-MAR PRODUCTS INC. | Styrene | 0.00 |
| INDUSTRIAL POLYMERS & CHEMICAL S INC | INDUSTRIAL POLYMERS & CHEMICAL S INC | Phenol | 0.00 |
| CLEANPART EAST | Mitsubishi Chemical | Nitric acid | 0.00 |
| TTM PRINTED CIRCUIT GROUP - STAFFORD DIV | TTM Technologies | Nitric acid | 0.00 |
| O'CONNELL OIL NORTHAMPTON FACILITY | O'CONNELL OIL ASSOCIATES INC | Hydrogen sulfide | 0.00 |
| RIVERDALE MILLS CORP | RIVERDALE MILLS CORP | Zinc compounds | 0.00 |
| FLEXCON CO INC. | FLEXCON HOLDINGS TRUST | n-Hexane (Hexane) | 0.00 |
| UNITED COUNTY INDUSTRIES | UNITED COUNTY INDUSTRIES | Ammonia (includes anhydrous ammonia and aqueous ammonia from water dissociable ammonium salts and other sources; 10 percent of total aqueous ammonia is reportable under this listing) | 0.00 |
| LEWCOTT CORP D/B/A BARRDAY COMPOSITE SOLUTIONS | LEWCOTT CORP D/B/A BARRDAY COMPOSITE SOLUTIONS | Phenol | 0.00 |
| ASTRO CHEMICALS INC | ASTRO CHEMICALS INC | N,N-Dimethylformamide | 0.00 |
| OMG INC | Steel Partners Holdings | Ammonia (includes anhydrous ammonia and aqueous ammonia from water dissociable ammonium salts and other sources; 10 percent of total aqueous ammonia is reportable under this listing) | 0.00 |
| ADHESIVE APPLICATIONS INC. - O'NEILL ST EASTHAMPTON | ADHESIVES APPLICATIONS INC | Toluene | 0.00 |
| SOLUTIA INC | Eastman Chemical | Methanol | 0.00 |
| TURF CARE SUPPLY-HATFIELD PLANT | Platte River Equity | Lead compounds | 0.00 |
| SONOCO PRODUCTS CO | Sonoco Products | Lead | 0.00 |
| ASTRO CHEMICALS INC | ASTRO CHEMICALS INC | Tetrachloroethylene | 0.00 |
| ASTRO CHEMICALS INC | ASTRO CHEMICALS INC | Certain glycol ethers | 0.00 |
| CS-MA LLC DBA CONSTRUCTION SERVICE | CS-MA LLC | Lead | 0.00 |
| CS-MA LLC DBA CONSTRUCTION SERVICE | CS-MA LLC | Lead | 0.00 |
| PREFERE MELAMINES LLC | One Rock Capital Partners | Methanol | 0.00 |
| FRITO-LAY INC | PepsiCo | Ammonia (includes anhydrous ammonia and aqueous ammonia from water dissociable ammonium salts and other sources; 10 percent of total aqueous ammonia is reportable under this listing) | 0.00 |
| ASTRO CHEMICALS INC | ASTRO CHEMICALS INC | Xylene (mixed isomers) | 0.00 |
| SMITH & WESSON INC. | Smith & Wesson | Nitric acid | 0.00 |
| ADHESIVE APPLICATIONS INC. - O'NEILL ST EASTHAMPTON | ADHESIVES APPLICATIONS INC | n-Hexane (Hexane) | 0.00 |
| GENTEX OPTICS INC | EOA HOLDING CO INC | Methanol | 0.00 |
| AVIENT COLORANTS USA LLC - HOLDEN FACILITY | Avient Corporation | Zinc compounds | 0.00 |
| DIMENSION-POLYANT INC. | DIMENSION-POLYANT INC. | Toluene | 0.00 |
| ASTRO CHEMICALS INC | ASTRO CHEMICALS INC | Diethanolamine | 0.00 |
| TURF CARE SUPPLY-HATFIELD PLANT | Platte River Equity | 2,4-D | 0.00 |
| SMITH & WESSON INC. | Smith & Wesson | Copper | 0.00 |
| TTM PRINTED CIRCUIT GROUP | TTM Technologies | Lead | 0.00 |
| RANDOLPH PRODUCTS CO | RANDOLPH PRODUCTS CO | Toluene | 0.00 |
| ASTRO CHEMICALS INC | ASTRO CHEMICALS INC | Ethylene glycol | 0.00 |
| LEWCOTT CORP D/B/A BARRDAY COMPOSITE SOLUTIONS | LEWCOTT CORP D/B/A BARRDAY COMPOSITE SOLUTIONS | Methanol | 0.00 |
| CONSTRUCTION SERVICE LLC | CS-MA LLC | Lead | 0.00 |
| TTM PRINTED CIRCUIT GROUP MULT ILAYER STAFFORD DIV | TTM Technologies | Copper compounds (this category does not include copper phthalocyanine compounds that are substituted with only hydrogen, and/or chlorine, and/or bromine.) | 0.00 |
| WESTFIELD ELECTROPLATING CO | WESTFIELD ELECTROPLATING CO | Cyanide compounds | 0.00 |
| SOLENIS LLC | Platinum Equity | Formic acid | 0.00 |
| SAINT GOBAIN PERFORMANCE PLASTICS | Saint-Gobain | Xylene (mixed isomers) | 0.00 |
| LEWCOTT CORP D/B/A BARRDAY COMPOSITE SOLUTIONS | LEWCOTT CORP D/B/A BARRDAY COMPOSITE SOLUTIONS | Toluene | 0.00 |
| IRWIN INDUSTRIAL TOOLS DBA LENOX TOOLS | Stanley Black & Decker | Lead | 0.00 |
| RPM WOOD FINISHES GROUP INC. | RPM International | Methyl isobutyl ketone | 0.00 |
| JAMES AUSTIN CO | Centerbridge Partners | Methanol | 0.00 |
| ASTRO CHEMICALS INC | ASTRO CHEMICALS INC | Toluene | 0.00 |
| O'CONNELL OIL NORTHAMPTON FACILITY | O'CONNELL OIL ASSOCIATES INC | Polycyclic aromatic compounds | 0.00 |
| HOLDEN TRAP ROCK | MA BROKEN STONE CO | Benzo[g,h,i]perylene | 0.00 |
| ASTRO CHEMICALS INC | ASTRO CHEMICALS INC | n-Butyl alcohol (1-Butanol) | 0.00 |
| HUTCHINSON PRECISION SEALING SYSTEMS INC | TotalEnergies SE | Zinc compounds | 0.00 |
| ASTRO CHEMICALS INC | ASTRO CHEMICALS INC | Formic acid | 0.00 |
| ASTRO CHEMICALS INC | ASTRO CHEMICALS INC | Methanol | 0.00 |
| OLDCASTLE APG NEW ENGLAND | CRH PLC | Lead compounds | 0.00 |
| E INK CORP | E INK CORP | Toluene | 0.00 |
| DAUPHINAIS CONCRETE | DAUPHINAIS CONCRETE INC | Nitrate compounds (water dissociable; reportable only when in aqueous solution) | 0.00 |
| U.S. DOD USAF WESTOVER ARB | U.S. Government | Xylene (mixed isomers) | 0.00 |
| NEW METHOD PLATING CO.,INC. | NEW METHOD PLATING CO.,INC. | Cyanide compounds | 0.00 |
| SAINT GOBAIN PERFORMANCE PLASTICS | Saint-Gobain | Methyl isobutyl ketone | 0.00 |
| DAUPHINAIS CONCRETE INC. | DAUPHINAIS CONCRETE INC | Nitrate compounds (water dissociable; reportable only when in aqueous solution) | 0.00 |
| ASTRO CHEMICALS INC | ASTRO CHEMICALS INC | Methyl isobutyl ketone | 0.00 |
| CS-MA LLC DBA CONSTRUCTION SERVICE | CS-MA LLC | Nitrate compounds (water dissociable; reportable only when in aqueous solution) | 0.00 |
| SAINT GOBAIN PERFORMANCE PLASTICS | Saint-Gobain | Toluene | 0.00 |
| CS-MA LLC DBA CONSTRUCTION SERVICE | CS-MA LLC | Nitrate compounds (water dissociable; reportable only when in aqueous solution) | 0.00 |
| CONSTRUCTION SERVICE LLC | CS-MA LLC | Nitrate compounds (water dissociable; reportable only when in aqueous solution) | 0.00 |
| ASTRO CHEMICALS INC | ASTRO CHEMICALS INC | tert-Butyl alcohol (tert-Butanol) | 0.00 |
| TURF CARE SUPPLY-HATFIELD PLANT | Platte River Equity | N-Methyl-2-pyrrolidone | 0.00 |
| HAZEN PAPER CO | HAZEN PAPER CO | N-Methyl-2-pyrrolidone | 0.00 |
| SAINT GOBAIN CERAMIC MATERIALS | Saint-Gobain | Chromium compounds (except for chromite ore mined in the Transvaal Region of South Africa and the unreacted ore component of the chromite ore processing residue (COPR). COPR is the solid waste remaining after aqueous extraction of oxidized chromite ore that has been combined with soda ash and kiln roasted at approximately 2,000 F.) | 0.00 |
| ASTRO CHEMICALS INC | ASTRO CHEMICALS INC | N-Methyl-2-pyrrolidone | 0.00 |
| ASTRO CHEMICALS INC | ASTRO CHEMICALS INC | Nonylphenol Ethoxylates | 0.00 |
| SOLUTIA INC | Eastman Chemical | Butyraldehyde | 0.00 |
| SHIELD PACKAGING CO INC | Shield Packaging Co. | MIXTURE | 0.00 |
| SAINT-GOBAIN ABRASIVES & SAINT -GOBAIN CERAMICS & PLASTICS | Saint-Gobain | Lithium carbonate | 0.00 |
| ROGERS CORP - WOODSTOCK | Rogers Corp. | N-Methyl-2-pyrrolidone | 0.00 |
| PALL CORP | Danaher | N-Methyl-2-pyrrolidone | 0.00 |