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Ms . Casey Foley January 2 , 1991 Page 3 soil contamination was noted in the sample or in the walls of the excavation. Native soil was found to consist of yellow brown silty sand. Samples S-13-2 and S-15-3 were collected from the base of the tank cavity after excavating below the former gasoline tank with the backhoe at the turbine (north) and fill port (south) ends of the tank, respectively . For each sample, the sampler was used to drive a clean brass sample sleeve into soil in the backhoe bucket immediately after the native, relatively undisturbed soil was removed from the excavation and the uppermost 6 to 8 inches were scraped off with a shovel . The tank was of single-walled steel construction; some corrosion was evident , but no evidence of holes was observed on the outer surface of the tank. No evidence of soil contamination was noted in the samples (possible very slight odor) or in the walls of the excavation. Native soil was found to consist of yellow brown silty sand. Sample S-2-4 was collected from the base of a trench below the location of a joint in the former product delivery line. The sample was collected at a depth of approximately 2 feet below surface grade using the percussion sampler . After each sample was collected, the sleeve was removed from the sampler and sealed with aluminum foil , plastic caps , and airtight tape. It was then labelled and placed into iced storage . The sample designation reflects the sample matrix (S = soil ) , the approximate sample depth (in feet below grade) , and the sample number . The approximate locations of the samples within the tank excavation is shown on the Generalized Site Plan (Plate 2) . A Chain of Custody Record was initiated by the sampler and accompanied the samples to the analytical laboratory . A copy of this record is attached. ROGER FOOTT ASSOCIATES, INC.