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EVAX Project 8578- y 15, 1992 <br /> SOIL SAMPLING <br /> A total of 5 soil samples were taken from the tank excavation. The <br /> geologist directed the backhoe operator to retrieve a load of soils <br /> from approximately 1.5 feet below the floor of the excavation at each <br /> end of Tanks 1 and 2, and at the fill end of Tank 3. Tank 1 samples <br /> were designated TIS (fill end) and TIN (non-fill end) . Tank 2 samples <br /> were designated T2S (fill end) and T2N (non-fill end) . Only 1 sample <br /> was taken from beneath Tank 3; the sample, T3S, was retrieved from <br /> beneath the fill end of the tank. <br /> In. addition, 2 samples were taken from bottom half of the stockpile of <br /> excavated soils and backfill . Each sample was retrieved from separate <br /> pits dug into the stockpile by hand with a shovel . The 2 stockpile <br /> samples were designated SP-1 and SP-2, respectively. Soil sampling <br /> locations are presented in the Site Plan, Figure 1. <br />` Each sample was collected by driving a pre-cleaned brass sleeve of 2- <br /> inch diameter and 6-inch length into the soils. The soil packed sleeve <br /> was then sealed with aluminum foil , plastic end caps, and tape. Each <br /> sample was labeled and then placed in iced storage for transport to a <br /> state certified laboratory. A chain of custody record was initiated in <br /> the field and followed the samples to the laboratory. <br /> LABORATORY ANALYSES <br /> The soil samples were submitted in iced storage on April 22, 1992 to <br /> Trace Analytical Laboratory Inc. (California Environmental Laboratory <br />+✓ Accreditation Certificate 1199) of Hayward, California. Samples TIN, <br /> TIS, T2N, T2S, SP-1, and SP-2 were each analyzed for: total petroleum <br /> hydrocarbons as gasoline (TPHg) and ethylene dibromide by Department of <br /> Health Services (DHS) recommended methods, and total lead by <br /> Environmental Protection Agency (EPA) Method 7420. Samples T3S, SP-1, <br /> and SP-2 were each analyzed for total petroleum hydrocarbons as diesel <br /> i, (TPHd) by DHS recommended method. All 7 soil samples were analyzed for <br /> benzene, toluene, ethylbenzene, and total xylenes by EPA Method 8020. <br /> The laboratory analyses report and chain of custody record are attached <br /> to this report. <br /> -2- <br />