THE WESTERN SAND & GRAVEL SITE IS LOCATED ON APPROXI- MATELY 20 ACRES STRADDLING BOUNDARY LINE BETWEEN BURRILL- VILLE & NO. SMITHFIELD, RI. BEFORE 1975, IT WAS USED FOR A GRAVEL MINING OPERATION BY JAMES CARDI, JR. IT IS CURRENTLY OWNED BY WESTERN SAND & GRAVEL, INC., A RI CORPORATION. BEGINNING AROUND 1975, ABOUT 12 OF THE 20 ACRES WERE USED FOR DISPOSAL OF LIQUID WASTES, INCLUDING CHEMICALS & SEWAGE WASTE. WASTES WERE DUMPED INTO 4 CHEMICAL LAGOONS & 8 OR MORE SEEPAGE PITS, ALL OF WHICH WERE UNLINED. THE WSTS SUBSEQUENTLY INFILTRATED THE HIGHLY PERMEABLE SOILS, PERCO- LATING INTO THE GROUNDWATER. AFTER APRIL 1979, HAZARDOUS WASTES WERE NO LONGER ACCEPTED AT THE SITE. AROUND MAY 1979 THE TOWNS OF BURRILLVILLE & N. SMITHFIELD DECLARED THAT THE SLATERSVILLE AQUIFER HAD BECOME CONTAMINATED BY WASTES MI- GRATING FROM THE SITE. APPROX 470,000 GAL OF WSTS WERE DE- POSITED AT SITE BETWEEN 5/78 & 4/79 ALONE. THE QUANTITY DE- POSITED BEFORE THAT TIME IS UNKNOWN, BUT NOT BELIEVED TO BE SIGNIFICANT. IN MARCH 1980, EPA PUMPED THE LAGOONS & BEGAN REMOVAL OF THE HAZARDOUS MATERIAL. ABOUT 60,000 GAL OF LIQUID WSTS WERE REMOVED. THESE ACTIONS WERE TAKEN UNDER AUTHORITY OF SECT 311 OF CWA & COMPLETED IN FALL OF 1980, PRIOR TO PAS- SAGE OF CERCLA. AN RI/FS WAS CONDUCTED UNDER A COOPERATIVE AGREEMENT W/STATE OF RI. IT WAS FOUND THAT THE CONTAMINANTS LEAVING THE SITE ARE MIGRATING PRIMARILY