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C) k <br /> based on San Joaquin Flood Control and Water Conservation District data (Fall 1990). Surface <br /> water bodies within one mile of the site include the Calaveras River to the north and the <br /> Stockton Diverting Canal to the south. <br /> 2.7 Proximity of Private, Municipal and Irrigation Wells: <br /> If needed, a survey of all active, inactive, and destroyed water supply and monitoring wells <br /> within a one-half mile radius of the project site, will be conducted. Field evidence indicates that <br /> groundwater beneath the site has not been impacted by the former underground storage tanks. <br /> 3.0 METHODS AND PROCEDURES <br /> A subsurface site investigation was performed to help characterize current soil conditions beneath <br /> the former tanks. The investigation consisted of drilling and sampling 2 soil borings, boring <br /> I abandonment, and subsequent laboratory analysis. <br /> All field activities were conducted in accordance with the site specific Health and Safety Plan <br /> on file with the SJCPHS. The field investigation was conducted under the supervision of a <br /> California Registered Geologist. <br /> 3.1 Drilling Activities <br /> On December 19, 1991, two soil borings, SB1 and SB2, were drilled to depths of approximately <br /> 21.5 feet and 28.5 feet below grade, respectively, to allow for the collection of soil samples in <br /> native soil directly beneath the former tanks (Figure 3). <br /> 1 <br /> Drilling was conducted by Exceltech Drilling (C57 license #622930) using a drilling rig with 6- <br /> inch diameter continuous-flight, hollow-stem augers. An experienced field geologist was present <br /> to continuously log all drill cuttings and soil samples utilizing the Unified Soil Classification <br /> System. Descriptions of soil types encountered, sample collection intervals, and boring <br /> abandonment were recorded on well/boring logs (Appendix II). <br /> R-010792.TJL 3 <br />