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1 <br />' 22 May 2003 <br /> • AGE-NC Project No 97-0333 <br />' Page 2 of 5 <br />' • 19 February 2003-Well development activities performed at wells MW-7 through MW-12 <br /> • 25 and 26 March 2003 -Initial ground water samples collected from multi-level monitoring <br /> wells MW-7 through MW-12 <br />' • 31 March 2003 - Elevation survey of wells MW-7 through MW-12 <br /> 2.0. DRILLING AND SAMPLING PROCEDURES <br /> Between 28 January and 05 February 2003, multi-level ground water monitoring wells MW-7 <br /> through MW-12 were Installed at the site Soil borings for MW-7 through MW-12 were advanced <br /> I vertically to maximum depths of 150 feet bsg utilizing a B-95 high torque, truck-mounted dnll ng <br /> equipped with 8-inch diameter hollow-stem augers All soil cuttings generated from drilling <br /> activities were stockpiled in and covered in two, 20 yard soil bins located in the west section of the <br /> site, soil bonng/momtonng well locations are depicted in Figure 2 Ground water monitoring well <br /> installation procedures for the site were outlined in Work Plan Addendum July 2002, dated 23 July <br /> 2002, prepared by AGE and approved by San Joaquin County Environmental Health Department <br /> (SJCEHD) by letter dated 02 August 2002 (Appendix A) <br /> I2 1 SOIL SAMPLING <br /> Due to upward heaving sands that AGE previously encountered during construction of multi-level <br />' wells for the adjacent Flag City Chevron site (6421 Capitol Avenue, Lodi CA), no sampling <br /> activities were performed during drilling for wells MW-7 through MW-12 Instead, soil borings at <br /> the Three B's Truck Plaza site were advanced to total depth with a wood plug in the lead drilling bit, <br /> upon reaching the total depth, tap water was deployed in the hollow stem augers prior to knocking <br /> out the wood plug as a counter measure to the upward heaving sand <br /> 2 2 EQUIPMENT DECONTAMINATION <br /> The hollow stem augers were steam cleaned prior to each bore hole advancement Rinseate generated <br /> from decontaminating the equipment was placed in properly labeled DOT-approved model 17H <br /> I55-gallon drums and was stored on-site in an area lacking public access <br /> Advanced GeoEnvironnsental,Inc <br /> I <br />