THIS IS AN ACTION TO RECOVER THE COSTS INCURRED BY EPA IN TAKING AND/OR FUNDING RESPONSE ACTIONS AT THE OLEAN WELL FIELD SITE, AND ASSOCIATED ADMINISTRATIVE, OVERSIGHT AND ENFORCEMENT COSTS. THE RESPONSE ACTIONS WHICH HAVE BEEN FUNDED BY EPA AT THE SITE INCLUDE SEVERAL IMMEDIATE REMOVAL ACTIONS, AN INITIAL REMEDIAL MEASURE, A PRELIMINARY HYDRO- GEOLOGIC INVESTIGATION, AN RI/FS, AND VARIOUS OTHER INVESTI- GATIONS. THE SITE IS ON THE NATIONAL PRIORITIES LIST. RE- IMBURSEMENT IS SOUGHT FROM SIX RESPONSIBLE PARTIES, EACH OF WHICH IS A PAST AND/OR PRESENT OWNER AND OPERATOR OF A FACI- LITY AT THE SITE, FOR PURPOSES OF 42 USC 9607. THE SITE IS LOCATED IN CATTARAUGUS COUNTY, NY, AND IS CHARACTERIZED BY CONTAMINATED GROUNDWATER UNDERLYING THE CI- TY OF OLEAN, THE TOWN OF OLEAN AND THE TOWN OF PORTVILLE, AND BY CONTAMINATED SOIL IN THE CITY AND TOWN OF OLEAN. TRICHLOROETHYLENE ( TCE ) IS PRESENT IN SOIL AT THE SITE AT LEVELS UP TO & OCCASIONALLY OVER 2,000,000 PPB, AND HAS BEEN DETECTED IN GROUNDWATER AT THE SITE IN CONCENTRATIONS OVER 10,000 PPB. IN ADDITION, SEVERAL OTHER VOC'S HAVE BEEN DE- TECTED AT THE SITE IN SIGNIFICANT CONCENTRATIONS. A NUMBER OF RESPONSE ACTIONS HAVE BEEN PERFORMED AND/OR FUNDED BY EPA AT THE SITE SINCE 1981. AMONG THESE ACTIONS WAS AN RI/FS COMPLETED IN THE SPRING OF 1985. THE EVIDENCE ESTABLISHING DEFENDANTS' LIABILITY UNDER SECTION 107 WAS OB- TAINED BY EPA DURING THE COURSE OF A N