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y' r 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 . we a 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 tant, respectively. ..For each sample, the sampler was used to d ive a clean brass sample sleeve into soil in the backhoe b cket immediately after the native , relatively undisturbed so .1 was removed from the excavation and the uppermost 6 to 8 inches were scraped off with a shovel . The tank was of s ngle-walled steel . construction; some corrosion was vident , 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 fount to consist of yellow brown silty sand. Sample S-2-4 was collected f om the base of a trench below the location of a joint in he former product delivery line. The sample was collected a a depth of approximately 2 feet below surface grade using he percussion sampler. After each sample was collec ed, the sleeve was removed from the sampler and sealed with luminum foil , plastic caps , and airtight tape. It was hen labelled and placed into iced storage. The sample de ignation reflects the sample matrix (S = soil ) , the app oximate sample depth (in feet below grade) , and the sample number . The approximate locations of the samples within tie tank excavation is shown on the Generalized Site Plan (Pla a 2) . A Chain of Custody Record was initiated by the sampler and accompanied the samples to the .analytical laborat ry . A. copy of this record is attached. ROGER FOOTT ASSOCIATES, INC.