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i4 r�. v Background and Previous Sampling Results The work reported for this sampling event was the fol owup of the removal of a single 275 gallon waste oil UST that was formerly located at the property owned by Mr. Henry Hansen at 200 South Cherokee Lane, Lodi, California(Exhibit 1). The site is located within the city limits of Lodi and is 30 feet east of Cherokee Lane (Exhibit !). The site is comprised of a single 1.2-acre parcel on which an automobile repair shop is located. The property is owned by Mr. Henry Hansen, an individual who has owned the parcel since 1990. The site is managed by Mr. Verseput (Rightway Properties). The site is leased to Millennium Automotive Repair which has occupied the site as an automobile repair.facility for over five years. Waste oil from automotive repairs was reportedly stor d in a single-walled, 275-gallon UST that was located south of the main building in the central p rtion of the property(Exhibit 2). This tank was reportedly in service from the early- 1980's u itil 1998 when it was taken out of service. The tank was reportedly never used to store any fuels d no dispensers or dispenser piping was observed to be present during the tank removal. The t k was removed by Jim Thorpe Oil on July 23, 1999. Prior to removal, the tank was triple rinsed onsite. Approximately 275 gallons of water were removed from the tank and disposed of asliquid hazardous waste under manifest. No obvious holes were found in the tank according to he San Joaquin County Public Health Services, Environmental Health Division (PHSEHD) spection Report dated July 23, 1999. Soil immediately adjacent to the base of the tank on tf.e east and north wall of the excavation was inspected and found to contain minor hydrocarbon sta ning and exhibited a gasoline-like smell. The soil samples were collected under the oversight a PHSEHD personnel. Soil samples were collected as depicted on Exhibit 3. Soil samples TK- 1 and TK-2 were collected at depths of 7.5 and 3 feet below ground surface, respectively. Soil sample SP I -Site#2 was collected from a pile of excavated soil that appeared to be strongly impacted by hydrocarbon staining. The soil samples were analyzed by a California state certified analytical laboratory using United States Environmental Protection Agency (USEPA)Test Me ods 5030 and 8020 for total petroleum hydrocarbons as gasoline fuel and benzene, toluene, ethyl benzene and xylene,respectively. USEPA Test Method 3550 was used to determine con entrations of total petroleum hydrocarbons as diesel fuel and/or oil. The laboratory analytical results for the soil samples are included as in the back of this report. Results for these.analyses are summarized in Table 1. Analyses for polychlorinated biphenyls (PCB's) were onducted using USEPA Test Method 8080 and volatile organic compounds (VOC's) by USEPA Test Method 8010. Results for these analyses are summarized in Table 2. The soil samples were also analyzed for hexavalent chrome, cadmium, lead,nickel, zinc, and chrome III using US PA Test Methods 7196, 6010, 7420, 6010, 6010, and 6010, respectively. Results for these analys s are summarized in Table 3. 2