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FIMISA - <br /> ry ' <br /> Evaluation of Contamination <br /> Former Texaco Service Station, Manteca, Californiay 3, 1989 <br /> JanuAGS 38053-1 <br /> c, <br /> The sediments encountered were classified according to the <br /> Unified Soil Classification System, which is summarized on Plate <br /> P-3. Descriptions of the earth materials encountered at the site <br /> are presented in the Logs of Boring (Plates P-4 through P-9) . <br /> Sediments underlying the site consist mainly of fine- to coarse- <br /> grained sands below 17 feet. Clayey silt to silty clay was <br /> encountered from approximately 11 to 17 feet below grade. A <br /> vertical section of the materials encountered is presented on the <br /> » idealized Cross section A-A' (Plate P-10) . Soil cuttings <br /> generated during drilling were stockpiled on the site. Disposal <br /> of the cuttings remains the responsibility of the client. <br /> Monitoring Wells <br /> 'li Monitoring wells MW-1, MW-2, and MW-3 were constructed in borings <br /> B-1, B-2, and B-3, respectively, at the time of soil exploration. <br /> The wells were constructed with thread-jointed, 2-inch-inner- <br /> diameter, Schedule 40 <br /> Polyvinyl chloride (PVC) casing. No <br /> chemical cements, glues, or solvents were used in well <br /> construction. The screened portion of each well consists of <br /> factory-perforated casing with 0.020-inch-wide slots and extends <br /> approximately-15 to 39--feet <br /> _-below-grade-in-_the-borings:--The - ---——-------- -_--- <br /> annular space of each well was packed with Monterey No. . 3 sand to <br /> 9 <br /> �-- <br /> Aga/led 1Ge0SYsten7S <br />