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of the excavation. Native soil as found to consist of I yellow brown silty sand. - Samples 5-13-2 and 5-15-3 were collected from the base F 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 F', sleeve into soil in the backhoe blucket immediately after li native soil was removed from the xcavation 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 F outer surface of the tank. No evidence of soil contamination was noted in the samples les iip (possible very slight Fodor) or in the walls of . the excavation. Native soil was found to consist of yellow brown oilty sand. F + Sample 5-2-4 was collected on June 5 1990 , from the base of a trench below the location of a joint in the former F1 product delivery line. The sample was collected at a depth of approximately 2 ft below surface grade using the drive FI�! sampler. �� i After each sample was collected, the sleeve was removed ! + from the sampler and sealed with aluminum foil , plastic caps, and airtight tape. It was hen labelled and placed Finto 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 U e tank excavation are shown on the Generalized site Pla (Plate 2) . A Chain of Custody Record was initiated by' t�e sampler and accompanied r- the samples to the analytical . laboratory. A copy of this record is included in Appendix A. i 1 ROGER FOOTT ASSOCIATES, INC. -2-