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i <br /> correlates well with water levels encountered during removal of <br /> ' the UST' s. <br /> PRIOR USE OF UST'S. <br /> ' The tanks were used to fuel company and personal vehicles for <br /> business purposes. They were installed an June, 1974, and were <br /> taken out of service in June, 1994, when they were removed <br /> ' There are no accurate records concerning fuel usage, and inven- <br /> tory tracking reconcilliation was not performed. <br /> ' LOCATION OF NEARBY WELLS: <br /> According to verbal communication with Margaret Lagorio of the <br /> San Joaquin County EHD, there are no domestic, private, or <br /> ' groundwater monitoring wells within the zone of influence of this <br /> site. <br /> ' DETAILS OF TANK REMOVAL <br /> On June 8, 1994, Thorpe Oil Co. removed two (2) 1,000 gallon <br /> UST' s which had been used for storing & dispensing unleaded <br /> gasoline Refer to EXHIBIT--C for a copy of the Application for - <br /> Tank Removal & Site Closure. There was a strong petroleum odor <br /> noted during excavation & removal of the tanks, and apparent soil <br /> ' discoloration. The piping from the tanks to the dispensing pump <br /> was removed, as well as the pump. No odors or discoloration were <br /> noted in those areas. The removal of the tanks was witnessed by <br /> ' Pamela Violett of the San Joaquin County EHD Soil samples were <br /> taken from the backhoe bucket by an employee of Geo-Analytical <br /> laboratory, as directed by the County representative. PLATE IV <br /> shows the locations of those samples. The results of the <br /> ' laboratory analyzes are listed on TABLE I ; copies of the <br /> laboratory reports are included as EXHIBIT G. The removed spoil <br /> was returned to the hole, and barricades were placed around the <br /> ' site. Refer to EXHIBIT E for a copy of the tank tracking <br /> records. Copies of the Underground Storage Tank Unauthorized <br /> Release Contamination Report, (#94-U32, ) and Notice of Hazardous <br /> Waste Discharge report, (Form EH-22 01.3, ) are included as EXHIBIT <br /> F, Correspondence from the San Joaquin Co. EHD, dated July 18, <br /> 1994, required further assessment work to evaluate possible soil <br /> & water contamination. Refer to EXHIBIT H. for details. As a <br /> ' result of that correspondence, a workplan was prepared by WJH to <br /> remove the returned soil & as much additional contamination as <br /> possible. A copy of that workplan .is included as EXHIBIT I. <br /> DETAILS OF OVEREXCAVATION & SAMPLING OPERATIONS CONDUCTED OCTOBER <br /> 21, 1994- <br /> Wm J. Hunter, RG from WJH, arrived on location at 0845, and <br /> i <br /> 1 3 <br />