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L Li <br /> k4 KLEINFELDER <br /> File No. 20-3937-01 <br /> September 3, 1996 <br /> 4 ACTIVITIES CONDUCTED <br /> Kleinfelder obtained well permits from. the San Joaquin County Public Health Services <br /> Department Environmental Health Division (PHS/EHD). As a part of the field assessment, <br /> three soil borings were.advanced to a maximum depth of 76 feet. During the advancement of <br /> the soil borings, Kleinfelder collected a total of thirty-six (36) soil samples for logging purposes, <br /> field screening and potential chemical analysis. Four (4) additional surface soil samples were <br /> obtained from the northern portion of the site for asbestos analysis. All of the soil borings were <br /> advanced using 8-inch outside diameter hollow stem auger. Chemical analysis was <br /> subsequently conducted on nineteen (1.9) of the soil samples obtained. Additionally, asbestos <br /> analysis (polarized light microscopy) was performed on the four additional samples. <br /> Following the advancement of each boring, a 2-inch I.D. SC1440 PVC monitoring well was <br /> constructed in each boring. Each well utilizes a locking riser well monument. For additional <br /> information regarding the well construction, please refer to Appendix .B. <br /> i <br /> The three monitoring wells were later developed, and sampled to assess the presence and <br /> extent of selected contaminants in groundwater. <br /> 4.1 PRE-FIELD ACTIVITIES <br /> Approved Well Pen-nits were obtained from PHS/EHD prior to initiating the field activities. A <br /> Right of Entry Agreement, was secured by Schaeffer Industries. Additionally, prior to the field <br /> activities, Kleinfelder prepared a limited health and safety plan for field work proposed. <br /> 4.2 DRILLING AND SOIL SAMPLING <br /> The soil borings were advanced by Spectrum Exploration, Inc. of Stockton, California using a <br /> CME-55 truck-mounted drill rig equipped with 8-inch outside diameter hollow stem augers. Soil <br /> cuttings from the borings were ternporarily placed on polyvisquene adjacent to each boring. All <br /> borings were converted to monitoring wells. <br /> ' While drilling, an experienced Kleinfelder environmental geologist classified the subsurface soil <br /> and logged the boreholes. A copy of the Unified Soil Classification System used to classify the <br /> soil and a log key are provided in Appendix A. Descriptions of the sample intervals and the soil <br /> encountered in each boring are also presented in Appendix A. Kleinfelder's Field Procedures for <br /> drilling and sampling are provided in Appendix B. <br /> f 20-3937-011MR960189 Page 7 of 18 O 1996, Kleinfelder, Inc. <br /> j , <br />