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S E C O R IConceptual Site Model . Chevron Service Station#9-6171 March 25, 2005 IPage 26 grade Soil samples were collected from the former UST pit and product piping trench, the I hydraulic lifts, the sand/water separator, and the former waste oil pit and piping trench Composite soil samples were also collected from the excavated stockpile Each soil sample was analyzed for TPHg, BTEX, MtBE, and oxygenate compounds None of the soil I samples contained oxygenate compounds or ethylbenzene No petroleum-hydrocarbon compounds were detected in the sod samples from the waste oil excavation The concentrations of TPHg, benzene, MtBE, toluene, and total xylenes in soil samples ranged I from below the method detection limits to 25,000 ppm, 270 ppm, 170 ppm, 0 016 ppm, and 0 023 ppm, respectively I6.7 Finest Care Cleaners—6503 Pacific Avenue Finest Care Cleaners is one of three dry cleaners named in a lawsuit initiated by Lincoln Properties Ltd against the parties believed to be responsible for groundwater contamination beneath Lincoln Village Shopping Center (LVSC) This lawsuit seeks to reclaim costs incurred by the Lincoln Center Environmental Remediation Trust during the subsurface investigation of the LVSC for chlorinated cleaning solvents The individual dry cleaners are collectively referred to as the Settling Dry Cleaning Defendants (SDCD) I • 6.7.1 Operational History and Regulatory Involvement The site is one of several businesses located in LVSC at 6503 Pacific Avenue It opened in the mid-1960's and is currently operating under the name of Park Woods Cleaners Prior to 1980, the dry-cleaning method consisted of manually transferring materials and chemicals between machines These systems were directly connected to the local sanitary sewer system, into which tetrachloroethene (PCE) contaminated wastewater from the dry-cleaning operations was discharged Used filters from the system were disposed of in communal trash receptacles provided by the shopping center, which resulted in a mixing of hazardous waste with non-hazardous waste After 1980, the dry-cleaning method became self- contained and electronically run Currently, PCE tainted wastewater is drained into 55- gallon drums that are connected directly to the machine Used filters are still manually changed, but are placed in 55-gallon drums for offsite disposal In May of 1993, the site was brought to the attention of the Environmental Protection Agency (EPA) and entered into the Comprehensive Environmental Response, Compensation, and Liability Information System (CERCLIS) Further site assessment occurred on behalf of the EPA to determine if the site should be considered for long term remedial response and placed on the National Priorities List (NPL) for federally financed cleanup under the Superfund Act N 1Fdes\ProtectslChevronlRetadl#9-6171\Site Conceptual Model\FINAL_CSM doc