THIS CASE INVOLVES A COST RECOVERY AND REMEDY IMPLEMENTA- TION PURSUANT TO CERCLA SECTIONS 106 AND 107(A). THE SITE PRESENTLY COVERS APPROXIMATELY FIVE ACRES AT THE SOUTHERN EDGE OF THE MUNICIPALITY OF CLOVERDALE, CALIF., ADJACENT TO HIGHWAY 101, ABOUT 90 MILES NORTH OF SAN FRAN- CISCO. THE SITE IS IN A MIXED INDUSTRIAL, RESEDENTIAL AREA. A CASTING PLANT LOCATED ON THE SITE HAS BEEN IN OPERATION FROM 1965 TO THE PRESENT. FROM THE PERIOD 1965 TO 1972, HYDRAULIC FLUIDS CONTAINING PCBS WERE USED IN THE CASTING PLANT TO OPERATE CASTING MACHINES WHICH CAST BRAKE COMPO- NENTS FOR LARGE MOTOR VEHICLES. THESE HYDRAULIC FLUIDS LEAKED FROM THE CASTING MACHINES IN THE NORMAL COURSE OF CASTING PLANT OPERATIONS AND WERE THEN COLLECTED, TOGETHER WITH WATER USED TO COOL THE DIES BETWEEN CASTINGS, IN FLOOR DRAINS. FOLLOWING GRAVITY SEPARATION OF OILS AND GREASE, THIS WASTEWATER CONTAINING PCBS WAS DISCHARGED, VIA A DRAIN LINE, TO THE GROUND ADJACENT TO THE CASTING PLANT. THE USE OF HYDRAULIC FLUID CONTAINING PCBS WAS GRADUALLY DISCONTINUED IN 1973, BUT WASTEWATER CONTAINING ETHYLENE GLYCOL (THE HYDRAULIC FLUID LATER USED IN THE CASTING MACHINES) CONTINUED TO BE DISCHARGED IN THE SAME MANNER UNTIL 1981. THE SOIL AT THE SITE IS CONTAMINATED WITH PCBS. THE GROUNDWATER IS CONTAMINATED WITH VOCS. THE REFERRAL INCLUDES A CONSENT DECR