FORMOSA PLASTICS CORPORATION IS A MANUFACTURER OF POLYVINYL CHLORIDE. THE FACILITY TREATS & STORES SEVERAL LISTED HAZ WASTES. THESE WASTES INCLUDE DISTILLATION ENDS, ETHYLENE DICHLORIDE, AND VINYL CHLORIDE. * FORMOSA STORES AND TREATS HAZ WASTE IN TANKS AND SUFACE IMPOUNDMENTS. LOCATED AT THE FACILITY ARE TWO STORAGE TANKS USED TO STORE DISTILLATION ENDS AND 13 UNITS, WHICH MEET THE DEFINITION OF A SURFACE IMPOUNDMENT, THAT ARE USED TO TREAT AND STORE HAZ WASTE. * FORMOSA WAS REFERRED TO EPA ON JULY 3, 1986. * THE FACILITY WAS INSPECTED BY TWC ON JULY 9-10, DEC 4, 1985, AND FEB 26, 1986. * THE FACILITY WAS ISSUED TWO LETTERS ON AUG 21, 1986 AND FEB 19, 1887. THE FACILITY WAS INSPECTED BY EPA ON APRIL 22-23, 1987. * VIOLATIONS FOUND IN ONE OR MORE OF THE INSPECTIONS AND/OR IN THE RESPONSE TO THE 3007 LETTERS INCLUDE: OPERATING W/O A PERMIT, FAILURE TO IMPLEMENT A GROUNDWATER MONITORING PROGRAM, NO CLOSURE PLAN, AND FAILURE TO DEMONSTRATE FINAN- CIAL ASSURANCE AND LIABILITYREQUIREM