NATIONAL GYPSUM CO OWNS AND OPERATES A PAPER, FABRIC, AND VINYL COATING FACILITY IN HATFIELD, MA WHICH PRODUCES WALL- PAPER AND WALL COVERINGS. NATIONAL GYPSUM IS OPERATING THE HATFIELD FACILITY IN VIOLATION OF MASS' FEDERALLY-APPROVED STATE IMPLEMENTATION PLAN ( SIP ). THE FACILITY IS VIOLAT- ING THE EMISSION LIMIT FOR VOLATILE ORGANIC COMPOUNDS ( VOC ) CONTAINED IN MASS' REGULATIONS 310 CMR 7.18(14), (15), AND (16) WHICH LIMIT VOC EMISSIONS FROM PAPER, FABRIC, AND VINYL SURFACE COATING FACILITIES TO 2.9, 2.9 AND 3.8 LBS OF VOC PER GAL OF COATING, EXCLUDING WATER, AT APPLICATION RESPECTIVELY. EPA APPROVED 310 CMR 7.18(14), (15), AND (16) PURSUANT TO SECT 110 OF CAA, 42 U.S.C. 7410, AND EPA MAY EN- FORCE 310 CMR 7.18(14), (15), AND (16) UNDER SECT 113 OF CAA 42 U.S.C. 7413. THE FACTUAL BASIS OF THE VIOLATION IS THAT THE HATFIELD FACILITY COATS THE SURFACE OF PAPER AND FABRIC WITH COATINGS WHICH CONTAIN, ON THE AVERAGE, 5.7 LBS OF VOC PER GAL OF COATING. NATIONAL GYPSUM ALSO COATS AND PRINTS PAPER AND VINYL SURFACES WITH COATINGS CONTAINING, ON THE AVERAGE, 6.1 LBS OF VOC PER GAL OF COATING. THE EMISSION LIMIT IN THE SIP FOR PAPER AND FABRIC COATING IS 2.9 LBS AND FOR VINYL COATING IS 3.8 LBS. THERE IS NO POLLUTION CONTROL EQUIPMENT AT THE HATFIELD FACILITY TO CAPTURE AND DESTROY THE VOC, AND TO DATE NATIONAL GYPSUM HAS MADE NO CHANGE IN ITS PRODUCTION PROCESSES TO REDUCE VOC EMISSIONS FROM