BOTH THE FULBRIGHT AND SAC RIVER LANDFILLS ARE LOCATED NORTH OF SPRINGFILED, MO, AND WERE OPERATED AS MUNICIPAL LANDFILLS BY THE CITY OF SPRINGFIELD. BOTH SITES RECEIVED INDUSTRIAL AND MUNICIPAL WASTES FOR LAND DISPOSAL FROM 1962 THROUGH 1969 (FULBRIGHT), AND 1968 THROUGH 1974 (SAC RIVER). A REMEDIAL INVESTIGATION (RI) AND FEASIBILITY STUDY (FS) WAS CONDUCTED BY THE DEFENDANTS, PURSUANT TO AN ADMINISTRATIVE ORDER ON CONSENT (AOC), ISSUED BY EPA, REGION VII ON 3/13/86 UNDER SECTION 106(A) OF CERCLA. FROM AVAILABLE INFORMATION, EPA BELIEVES THE FOLLOWING CATEGORIES OF INDUSTRIAL WASTES WERE DISPOSED OF IN THE LANDFILLS DURING THEIR PERIOD OF OPERATIONS: CYANIDE AND CYANATE SALTS; PLATING RESIDUE CONTAINING CADMIUM, ZINC, CHROMIUM AND NICKEL; SPENT SULFURIC AND HYDROCHLORIC ACIDS; SPENT CHROMIC ACID; ACIDIC CHROME STRIPPERS AND STEEL STRIP- PERS; TRICHLOROETHYLENE AND STODDARD SOLVENT; SULFUR SALTS; FILTERCAKE CONTAINING AMMONIUM CHLORIDE, POTASSIUM CHLORIDE, AND SODIUM CHLORIDE FROM D1-LACTONE STILL RESIDUE; NAPTHAS; TURPENTINE; PAID AND PAINT THINNER; IODINE-CONTAINING RESIDUES; CHOLINE CHLORIDE; AND RUBBER WASTES. WHILE THE CITY OF SPRINGFILED OWNED AND OPERATED THE PROPER- TY UPON WHICH THE LANDFILLS WERE LOCATED, LITTON INDUSTRIES, INC., AS A SUCCESSOR CORPORATION TO THE ROYAL MCBEE CORPORA- TION, WAS THE ONLY GENERATOR THAT COULD BE SUFFICIENTLY IDENTIFIED AS A POTENTIAL RESPONSIBL