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4 <br /> Proposed Work Plan November 4 , 1988 <br /> U.S.A. Petroleum Station No. 65, Lodi., California AGS 87050-3 <br /> depth and then driving the sampler into the native soil through <br /> the hollow center of the auger. The sampler will be driven 18 <br /> inches with a standard 140-pound hammer dropped 30 inches. The <br /> number of blows required to drive the sampler each successive 6 <br /> inches will be counted and recorded to give an indication of soil <br /> consistency. <br /> Samples collected for possible chemical analyses will be sealed <br /> with aluminum foil, plastic caps, and airtight tape. They will <br /> then be labeled and immediately placed in iced storage for <br /> transport to the analytical laboratory for testing. Chain of <br /> Custody Records will be initiated by the sampler and will <br /> accompany the samples to the laboratory. Copies of these records <br /> will be presented in our Problem Assessment Report. <br /> The soil borings will be drilled to a depth approximately 20 feet <br /> below the upper zone of saturation or 5 feet into any saturated <br /> clay layer (aquitard) encountered. If an aquitard is <br /> encountered, the borings will be terminated and backfilled with 5 <br /> feet of bentonite before installing ground-water monitoring <br /> wells. <br /> 8 <br /> Applied GeoSystems <br />