FIELD DOCUMENTS - Laserfiche WebLink

Home Browse Search

F1 F1 of the excavation. Native soil was found to consist of yellow brown silty sand. Samples 5--13-2 and S-15-3 were collected from the base Fjof 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 F] native soil was removed from the excavation and the uppermost 6 to' 8 inches were scraped off with a shovel . The F tank was of single-walled steel construction; some corrosion was evident , but no evidence of hlles was observed on the outer surface of the tank. No evidence of soil contamination was noted in the sa ►ples (possible very slight + odor) or in the walls of the excavation. Native soil was found to consist of yellow brown silty sand. FiSample 5-2-4 was collected on June 5, 1990 , 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 ft below surface grade using the drive a 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 I ocations of the samples within .the tank excavation are 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 included in Appendix A. ROGER FOOTT ASSOCIATES, INC. 2-