NATURE OF THE CASE: THE STRINGFELLOW SITE IS LOCATED 5 MILES NORTHWEST OF RIVERSIDE, CA, ADJACENT TO THE COMMUNITY OF GLEN AVON. BETWEEN 1956 & 1972 APPROX 32 MILLION GALLONS OF HAZ INDUST- RIAL WASTE WERE DISCHARGED INTO UNLINED EVAPORATION PONDS ON THE 22 ACRE SITE. THE DISCHARGED WASTES WERE PRIMARILY LIQUIDS & SOLUTIONS CONTAINING ACIDS, CAUSTICS, ORGANIC SOL- VENTS, HEAVY METALS, DDT & PCB'S. THE DISPOSAL AREA LIES IN A CANYON IN THE NATURAL DRAINAGE PATH OF APPROX 270 ACRES OF WATERSHED. BETWEEN 1969 & 1980, DUE TO HEAVY SEASONAL RAINFALL, SEVERAL CONTROLLED & UNCONTROLLED RELEASES OF HEAVILY CONTAMINATED RAIN WATER OCCURRED; SURFACE CONTAMINATION(DDT, HEAVY METALS) HAS SINCE BEEN FOUND AS FAR AS SEVERAL MILES DOWNSTREAM FROM THE SITE. SUBSURFACE FLOWS OF CONTAMINATED GROUNDWATER HAVE BEEN DETECTED AT LEAST 1/2 MILE DOWN CANYON FROM THE SITE. WHILE CONTAMINATION FROM THE SITE HAS NOT BEEN DETECTED IN THE CHINO II GROUNDWATER BASIN, WHICH SERVES AS A DOMESTIC, IN- DUSTRIAL & AGRICULTURAL WATER SUPPLY, THE GROUNDWATER AT THE SITE FLOWS DIRECTLY INTO THE CHINO AQUIFER, APPROX 1 MILE AWAY. 245 POTENTIALLY RESPONSIBLE PARTIES HAVE BEEN IDENTI- FIED. THESE CONSIST OF OWNERS, OPERATORS, GENERATORS & TRANSPORTERS. OF THESE, 175 HAVE BEEN GIVEN NOTICE OF THEIR POTENTIAL LIABILITY.