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Elks Lodge Property 0 <br /> 317 South Center Street March 16, 2001 <br /> ' Stockton, California Page' 2 <br /> ' has reached the groundwater. The soil boring location is illustrated in Figure 3 of this <br /> report. <br /> ' 3.1 Drilling <br /> Permits were obtained as necessary for all wells (including borings) before <br /> ' drilling began. The soil boring were accomplished using a mobile mounted <br /> drilling rig employing the use of a hollow stem flight auger whose outer <br /> ' diameter is no less than 6 inches. <br /> All drilling equipment was thoroughly cleaned before drilling began, to prevent <br /> ' the introduction of contamination from off site, and between borings to prevent <br /> cross contamination. <br /> ' The borings were logged under the direct supervision of a registered <br /> professional using the Unified Soil Classification System (Appendix A). The <br /> color, texture, moisture, plasticity (if applicable), consistency of the earth <br /> ' materials, pertinent soil or bedrock characteristics, and any evidence of <br /> contamination were noted. All water-bearing zones and the depths at which <br /> they were encountered were also noted on these logs (Appendix B). <br /> The boring was drilled in such a manner as to prevent cross contamination <br /> between strata. Upon termination, the boring into the saturated zone was <br /> backfilled with concrete grout, after a Bentonite seal had been placed. <br /> ' The cuttings from the drilling operation were containerized in 55 gallon drums, <br /> pending the results of laboratory data. <br /> ' 3.2 Soil Sampling <br /> ' All soil sampling equipment was thoroughly cleaned before and between <br /> sampling to prevent cross contamination. Relatively undisturbed soil samples <br /> were be taken at intervals of not more than 5 feet in order to evaluate the <br /> ' subsurface materials, however, this sampling interval was waived in saturated <br /> sands in which sample recovery is not possible. <br /> The soil samples were taken using a California Modified Split Spoon sampler <br /> with brass liners. The sampler was driven continuously by a wire line hammer. <br /> ' The laboratory samples did not have head space and were immediately sealed in <br /> • their liners using Teflon® lined plastic caps. The remaining sample was <br />