NATURE OF THE CASE: UNION CARBIDE IS A LARGE MANUFACTURER OF PETROCHEM- ICAL & RELATED PRODUCTS. THE SOMERSET FACILITY IS A POLY- VINYL CHLORIDE PLANT. CAUSE OF ACTION: THIS PLANT IS SUBJECT TO THE NATIONAL EMISSION STANDARD FOR VINYL CHLORIDE, 40 CFR SEC 61.60 ET SEQ. THE ACTION INVOLVES VIOL'S OF SEVERAL PORTIONS OF THE STAND- ARD, INCLUDING RELIEF VALVE DISCHARGES, FAILURE TO REPORT EXCESS EMISSIONS, FAILURE TO IMPLEMENT LEAK DETECTION, & EXCESS EMISSIONS FROM SEALS ON PUMPS. PROPOSED REMEDY: THE GOV'T HAS BEEN NEG'ING A CD WHICH WOULD REQUIRE UNION CARBIDE TO INSTALL SOME EQUIPMENT & INSTITUTE CER- TAIN OPERATION & MAINTENANCE PROCEDURES. IT WOULD ALSO REQUIRE THE PAYMENT OF A CIVIL PLTY FOR PAST VIOL'S. NATIONALLY SIGNIFICANT ISSUES: RESOLUTION OF THE CASE, WHICH INVOLVES NATIONALLY APPLICABLE STANDARDS, WILL SET A PRECEDENT FOR ALL OTHER ENFORCEMENT ACTIONS INVOLVING VINYL CHLORIDE VIOL'S.