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. Canow-eEnvironmental <br /> • Canonie Environmental Services Corp. <br /> 7901 Stoneridge Drive <br /> L.r Suite 100 <br /> Pleasanton, California 94588 <br /> ? Phone: 415-463-9117 <br /> December 13, 1991 FAX: 415.463-2981 <br /> 91-106-05 <br /> i.. Mr. Harlin Knoll, REHS <br /> San Joaquin County Public Health Services <br /> Environmental Health Department <br /> • PO Box 2009 <br /> Stockton, California 95201 <br /> r <br /> Closure Excavation and Sampling Report <br /> Time Oil Co. Site <br /> 13475 North Jack Tone Road <br /> Lodi, California <br /> Dear Mr. Knoll: <br /> This Closure Excavation and Sampling Report presents the results of remedial activities <br /> r performed by Canonie Environmental Services Corp. (Canonie) at the Time Oil Co. site <br /> L located at 13475 North Jack Tone Road in Lodi, California (Figure 1). This letter report <br /> summarizes field activities performed in accordance with a Closure Excavation and <br /> L Sampling Work Plan dated September 6, 1991 approved by the San Joaquin County <br /> Public Health Services, Environmental Health Department (Environmental Health). <br /> Site Back round <br /> Six underground storage tanks were originally removed from the Jackpot Food Mart <br /> owned by Time Oil in November 1990. Following tank and product piping removal, a total <br /> of 17 soil samples were collected and analyzed for closure verification. The results of <br /> these original analyses are presented in Table 1 and sample locations can be referenced <br /> L on Figure 1. One of three soil samples taken under the former 12,000-gallon gasoline <br /> tank location (designated Sample No. 5) at a depth of 15 feet indicated the presence of <br /> total petroleum hydrocarbons as gasoline (TPH-G) at a concentration of 91 parts per <br /> L million (ppm) and benzene, toluene, ethylbenzene, and xylene (BTEX) at concentrations <br /> of 0.10 ppm, 0.72 ppm, 6.6 ppm, and 0.81 ppm, respectively. Additionally, a soil sample <br /> collected at a depth of three feet from the south end of the pump island indicated the <br /> L presence of TPH-G at a concentration of 590 ppm and BTEX at concentrations of 1.3 <br /> ppm, 2.2 ppm, 5.2 ppm, and 0.30 ppm respectively. None of the other 15 soil samples <br /> indicated detectable concentrations of any analytes. <br /> I' <br /> L <br />