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• <br /> December, 1994 - Site of removed UST was reentered and approxi- <br /> mately 108 cubic yards of soil was removed. Field observation <br /> and results of laboratory analyzes revealed that some contami- <br /> nated soil remained. Refer to WJH report titled "INTERIM ASSESS- <br /> MENT REPORT COVERING RESULTS OF SOIL EXCAVATION. . . . " , dated March <br /> 20, 1995 for details of that work. <br /> March, 1995 - Results of the fourth quarterly groundwater <br /> monitoring showed that the hydraulic gradient is still to the <br /> north, and only MW-2 revealed any contamination. <br /> June, 1995 - Workplan submitted by WJH to place several soil <br /> probes and an additional monitoring well . Refer to EXHIBIT A for <br /> a copy of that workplan. <br /> July, 1995 - Fifth quarterly monitoring performed; gradient still <br /> to north, and MW-2 only well showing contamination. <br /> August, 1995 - San Joaquin County EHD approved the workplan with <br /> revisions -- refer to EXHIBIT B for a copy of that letter. <br /> . SUMMARY OF RESULTS OF WORK DONE NOVEMBER 27 & 28, 1995 - <br /> PLACEMENT OF 8 SOIL/WATER PROBES : <br /> On November 27, 1995, Transglobal Environmental Geochemistry, <br /> (TEG, ) mobilized a Strataprobe unit equipped with clean, 5 ' <br /> lengths of stainless steel hollow rods, a split-spoon soil sample <br /> chamber designed to hold 1 1/2" diameter metal sleeves, and a <br /> hydropunch water sampling tool . The sample chamber can take a <br /> maximum of 15" of core. Prior to moving in equipment, locations <br /> of the soil probes had been marked & cleared by USA. <br /> TEG also mobilized their DHS Certified Mobile laboratory, <br /> (# 2012 , ) operated by Henry Wilkinson. <br /> William Hunter, RG of Wm. J. Hunter & Associates, (WJH, ) dis- <br /> cussed the scope of work with TEG personel and lessees of the <br /> adjacent building. After clearing the area of miscellaneous <br /> material, the probe truck was set up on location A-1 as shown on <br /> PLATE III . A 4" diameter hole had previously been drilled <br /> through the concrete . A split-spoon sample chamber was attached <br /> to the bottom of the hollow pipe and pushed and hammered to 5 ' <br /> bgl, and a core was taken by driving the split-spoon sample <br /> barrel to 616" . Recovery consisted of 15" of tan to brown clay, <br /> slightly silty & containing inclusions of black minerals and/or <br /> degraded asphalt . No odor was noted; one tube was promptly <br /> sealed and labeled and delivered under chain of custody to Mr. <br /> 3 <br />