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Advanced <br /> GeoEnvironmenta , If! o <br /> 10 June 1999 <br /> AGE-NC Project No . 96-0229 <br /> Mr. Mike Infuma <br /> San Joaquin County PHS-EHD <br /> 304 East Weber Avenue, Third floor <br /> Stockton, California 95202 <br /> Subject: Disposal Options for Stockpiled Hydrocarbon-Impacted Soils <br /> Pacific Car Wash <br /> 4405 Pacific Avenue, Stockton, California <br /> Dear Mr. Infama: <br /> At the request of Ms: Lila Billheimer of the J. C. Shaugnessy Estate, Advanced GeoEnviromnental, <br /> Inc. (AGE) has prepared the following feasibility analysis for disposal or treatment of hydrocarbon- <br /> impacted soil stockpiled at the Pacific Car Wash, 4405 Pacific Avenue (site) in Stockton, California <br /> (Figure 1 ). <br /> Three underground storage tanks (USTs), fuel dispensers and associated product lines were removed <br /> from the site in January 1999. Two 12,000-gallon gasoline USTs and one 6,000-gallon gasoline UST <br /> were removed from the site. The approximate locations of the former USTs, product piping and <br /> dispensers are shown on Figure 2 . <br /> After removal of the USTs and collection of samples, the excavation was backfilled with imported <br /> material and contaminated soil removed during excavation. <br /> Approximately 250 cubic yards of hydrocarbon-impacted soil remains on-site (Table 1 ). According <br /> to San Joaquin County Public Health Services - Environmental Health Division (PHS-EHD) and <br /> Regional Water Quality Control Board policy, the impacted soil cannot be used for fill material off- <br /> site nor transported to another property owned by the generator for treatment. Therefore, the soil <br /> must be treated on-site or transported off-site for treatment of disposal at a regulated facility. <br /> AGE examined the following methods of treatment and/or disposal of the remaining soil: <br /> 1 . Natural Attenuation (on-site aeration) ; <br /> 2. Enhanced ex-situ bioremediation; <br /> 3 . On-site thermal treatment; <br /> 4005 North Wilson Way , Stockton , California 95205 <br /> Telephone (209 ) 467- 1006 FAX (209) 467- 1 1 18 <br />