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�. -ham.. t_ dp• - xr ! C�/., �I'r ^,: ]Y A a �.rl -5- I SOiI 5ampling, Soil samples were collected at various y depths in each borehole. Soil sampling was accomplished by driving a 2-1/2-inch-diamGter by 18-inch-long brass tube-lined modified California sampler into the soil using a 140--pound down-hole hammer (mountzd on the drilling rig) . The sampler was washed with laboratory grade detergent and rinsed with deionized stater between each use to prevent cross-contamination. Upon removal from the borehole, the ends of the soil coreq contained in the brass sampling tubes were visually inspected for soil characteristics and odor. Soils encountered were generally silty sands. Borehole logs if GL-1 through GL-5 are included in Appendix . a. The tubes were then sealed with aluminum foil and an air-tight plastic cap, and labeled with the project and borehole number, depth interval, end date. The samples were stored in a chilled ice chest and transported to Brown and CaldwelA. 's analytical laboratory 'in Emeryville, Cdliforaia, to be analyzed for BTx and TPH. Chain-of-custody forn,s were completed for all samples. The analytical results 6 are shown in Table 2. 3 ?I 'Fable 2. Geceke Lodi Property-Soil Analysisa,b Sample TotalT]3en!zene i 5am'ole depth, petroleum feet hydrocarbonI;RplqueneTotal xylene GLIA 10.0-r0.5 <i0 - GL2B 7.5-8.0 240 <1 2 8 GL2^ 9.0-9.5 200 <1 10 32 GLS' 12.0-12.5 <10 <1 <1 <2 - GL2K 15.0-15.5 <10 <1 <1 <2 GL3AA 8.5-9.0 67 <1 1 4 GL3B 10.0-10.5 110 <1 <1 GL3F 15.5-16.0` 30 <1 <1 <2 GL3J 20.0-20.5 <10 <1 <1 <2 GL4C 10.0-10.5 <10 <1 <1 <2 GL4D 12.0--12.5 <10 <1 <1 <2 't GL41 15.0-15.5 <10 <1 <1 <2 GLSA 5.O-F.5 21 <1 <1 <2 GL5B 6.0-6,5 20 <1 <1 <2 GL5E 10.0-10.5 <10 <1 <1 <2 �;MK 13.2-13.5 <10 <1 <1 <2 - - __ aAll readings in mg/kg. bAll samples taken on February 11, 1966. - Note: <--Not present at or above the indicated value.