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41 n <br /> KEI-P89-1104 .R7 <br /> December 10, 1990 <br /> Page 3 <br /> the old fuel tank pit when three sidewall soil samples, labeled <br /> SW4 (3) SW5 and SW6, were collected from the northerly half of the <br /> old fuel tank pit at a depth of approximately 16 feet. Sample <br /> point locations are shown on the attached Site Plan, Figure 3 . <br /> Also on December 13 , 1989, four additional soil samples, labeled <br /> P1 (6) , P2 (17) , P3 (5) and P4 (8) , were collected from the product <br /> pipe trenches at sample point locations PI, P2 , P3 and P4 , <br /> respectively. Sample depths ranged from 5 to 17 feet. Sample <br /> point locations are as shown on the attached Site Plan, Figure 4 . <br /> After sampling, the product pipe trenches were excavated to the <br /> sample depths. Upon review of the laboratory analyses for these <br /> samples, a 15-inch diameter casing (14 feet deep) was installed <br /> near sample point location P2 (17) . <br /> After completion of the soil sampling on December 13 , 1989, a water <br /> sample was taken from the on-site domestic well system after <br /> purging a minimum of three piping volumes. The sample was also <br /> taken only while the pump was operating to avoid drawing water from <br /> the holding tank. <br /> . All samples were analyzed by Sequoia Analytical Laboratory in <br /> Redwood City, California and were accompanied by properly executed <br /> Chain of Custody documentation. All soil samples were analyzed for <br /> total petroleum hydrocarbons (TPH) as gasoline using EPA method <br /> 5030 in conjunction with modified 8015, benzene, toluene, xylenes <br /> and ethylbenzene (BTX&E) using EPA method 8020, tetraethyl lead <br /> using the DHS-LUFT method, and ethylene dibromide using modified <br /> DHS-AB1803 . The waste oil tank bottom and waste oil remote fill <br /> piping samples were analyzed for total extractable petroleum <br /> hydrocarbons (TEPH) using EPA methods 3550 in conjunction with <br /> modified 8015, BTX&E using EPA 5030 in conjunction with 8020, <br /> halogenated volatile organics using EPA method 8010, PCB's using <br /> EPA 8080, and metals - cadmium, chromium, lead and zinc. The water <br /> sample was analyzed for TPH as gasoline using EPA methods 5030 and <br /> 8015, BTX&E using EPA 503 . 1, halogenated volatile organics using <br /> EPA 502 . 1, tetraethyl lead using DHS-LUFT and ethylene dibromide <br /> using EPA 504 . <br /> Analytical results of the final soil samples collected from beneath <br /> the fuel storage tanks, {samples Al, A2 (25.5) , B1 and B2 (26.5) 1 , <br /> indicated levels of TPH as gasoline ranging from non-detectable to <br /> 1. 7 ppm, with non-detectable levels of ethylene dibromide. <br /> Analytical results of the soil samples, collected from sidewalk of <br /> the fuel storage tank pit, indicated levels of TPH as gasoline <br /> ranging from non-detectable to 16 ppm, levels of ethylene dibromide <br /> . ranging from non-detectable to 0. 014 ppm, and levels of benzene <br /> ranging from non-detectable to 0. 58 ppm. Analyses of the soil <br /> sample collected from the new tank pit indicated non-detectable <br /> levels of all constituents analyzed. Analytical results of the <br />