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• <br /> Del-Tech Geotechnical Support Services , a copy of that report is <br /> included as EXHIBIT B. The results of the laboratory analyzes of <br /> water samples, shown on EXHIBIT C, revealed high concentrations <br /> of BTEX, & a moderate level of TPH as gasoline <br /> March 27, 1995 - Wm. J Hunter & Associates submitted workplan to <br /> accomplish County' s requirements as detailed in their 2/27/1995 <br /> correspondence . Refer to EXHIBIT D for a copy of that workplan <br /> April 10, 1995 - San Joaquin County EHD approved the workplan <br /> with suggested changes - EXHIBIT E. <br /> May 1, 1995 - Package submitted to State Cleanup Fund staff for <br /> pre-approval of estimated costs to do the work. <br /> May 9 , 1995 - Approval received from Fund staff <br /> DETAILS OF WORK PERFORMED UNDER APPROVED WORKPLAN. <br /> Drilling contractor originally selected to place the wells was in <br /> the process of reorganization, and could not verify license <br /> • <br /> requirements Therefore, another contractor was selected, which <br /> delayed beginning of the work <br /> On June 1, 1995, Mitchell Drilling mobilized a CME 75 auger rig & <br /> suppport truck on site, Bart Jurgens, driller. Charles Fry, RG <br /> from Wm J. Hunter & Associates, was on location when equipment <br /> arrived The locations for the wells had been marked in advance, <br /> the rig set up on monitoring well #2 It was equipped with <br /> clean, 8 1/411 OD auger flights & two {2} 1811 California Modified <br /> split-spoon samplers <br /> Operations commenced at 0815 ; a large diameter bit was used to <br /> cut through the asphalt & allow room for the wellhead vault after <br /> completion of the well . It was then removed and a standard bit <br /> placed on the auger flight . Surface sediments consisted of tan <br /> to dark brown, sticky plastic clay, grading to a tan to brown <br /> clay After drilling to 9 feet below grade, the core barrel & <br /> metal tubes were cleaned by washing with Alconox & rinsing with <br /> clean water The barrel was filled with the clean 211 x 611 metal <br /> sample tubes, lowered into the augers and a core was taken from <br /> 91 to 1016}1 by driving the core assembly with a 140 pound hammer <br /> The core barrel was retrieved and placed on a clean surface for <br /> examination. After opening the barrel, the geologist described <br /> the contents of each tube, a portion of the top or middle tube <br /> was placed in a sealed plastic bag, clearly labeled, and placed <br /> aside for testing for vapors . The bottom tube was sealed as <br /> • follows : both ends was covered with teflon tape & plastic caps, <br /> 5 <br />