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of the excavation. Native soil was found to consist of <br /> yellow brown silty sand. - <br /> Samples S-13-2 and S-15-3 were collected from the base <br /> of the tank cavity after excavati g below the former <br /> gasoline tank with the backhoe at the turbine (north) and <br /> fill port (south) ends of the tank, respectively . For each j <br /> sample, the sampler was used to drive a clean brass sample <br /> hsleeve into soil in the backhoe bucket immediately after <br /> native soil was removed from the excavation and the <br /> uppermost 5 to 8 inches were scraped off with a shovel . The <br /> F tank was of single-walled steel construction; some corrosion <br /> was evident , but no evidence of �oles was observed on the <br /> houter surface of the tank. No evidence of soil <br /> contamination was noted in the s mples (possible very slight <br /> odor) or in the walls of the excavation. Native soil was <br /> found to consist of yellow brown silty sand. <br /> Sample S-2-4 was collected on June 5 , 1990 , from the <br /> base of a trench below the location of a joint in the former <br /> product delivery line. The sample was collected at a depth <br /> of approximately 2 ft below surface grade using the drive <br /> sampler. <br /> After each sample was collected, the sleeve was removed <br /> Fil' <br /> from the sampler and sealed with aluminum foil , plastic <br /> caps, and airtight tape. It was then labelled and placed <br /> F1into iced storage. The sample d signation reflects the <br /> sample matrix (S = soil ) , the approximate sample depth (in <br /> Ffeet below grade) , and the sample) number. The approximate <br /> I ocations of the samples within the tank excavation are <br /> shown on the Generalized Site PlIn (Plate 2) . A Chain of <br /> R Custody Record was initiated by. the sampler and accompanied <br /> the samples to the analytical laboratory . A copy of this . <br /> Frecord is included in Appendix Al <br /> ROGER FOOTT ASSOCIATES, INC. <br /> - 2- <br />