CEDAR CHEMICAL CORPORATION (CCC) OWNS AND OPERATES A CHEMICAL MANUFACTURING PLANT IN VICKSBURG, MISSISSIPPI. SINCE 1980, THE COMPANY HAS GENERATED HAZARDOUS WASTE (P020) A COMMERCIAL CHEMICAL PRODUCT KNOWN AS DINOSEB, WHICH FLOWS FROM A PRODUCTION AREA, THROUGH A SYSTEM OF SUMPS INTO A SURFACE IMPOUNDMENT. THE COMPANY PRODUCED TOXAPHENE WHICH GENERATED A WASTEWATER (K098). THE WASTEWATER FLOWED, UNTREATED, INTO THE SURFACE IMPOUNDMENT, AND PRODUCTED A SLUDGE (K041). CCC ALSO OPERATEDS A STORAGE AREA PURPORTEDLY FOR STORAGE OF HAZARDOUS WASTE FOR LESS THAN NINETY DAYS. ON JUNE 23, 1980, CCC (AS VERTAC) NOTIFIED EPA THAT IS GENERATED, TREATED, STORED, DISPOSED OF AND TRANSPORTED HAZARDOUS WASTES K041, P020, P047, U044, U224 AND U239. THE FACILITY SUBMITTED A PART A HAZARDOUS WASTE PERMIT APPLICATION ON NOVEMBER 18, 1980, INDICATING THAT IT WAS USING A SURFACE IMPOUNDMENT AS A TREATMENT UNIT (T04). CCC SUBSEQUENTLY AMENDED THE PART A ON AUGUST 10, 1983 TO SHOW THAT THE SURFACE IMPOUNDMENT WAS BEING USED AS A STORAGE UNIT (S04).