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s t <br /> .1 <br /> STj�7�T(/S 3330 Cameron Park Drive,Suite 200 <br /> r:,vK vrni roc Cameron Park,California 95682 <br /> r Ph:(5301 676-6001 C.&C 0301676-6005 <br /> Project No. 2007-065-01 <br /> May 19, 2000 <br /> Mr. Harlin Knoll <br /> San Joaquin County Public Health Services <br /> Environmental Health Division <br /> 304 East Weber Avenue, Third Floor <br /> Stockton, California 95202 <br /> Re: Results of Additional Assessment at USA Service Station No. 65 located at 2500 <br /> West Lodi Avenue, California. <br /> Dear Mr. Knoll: <br /> On behalf of USA Gasoline Corporation (USA), Stratus Environmental, Inc., (Stratus) <br /> has prepared this report to present the results of the additional assessment completed at <br /> USA Service Station No. 65, located at 2500 West Lodi, Avenue, Lodi, California (see <br /> Figure 1). The purpose of the investigation was to further assess the lateral extent of <br /> petroleum hydrocarbon impact to soil and groundwater to the west and southwest of the <br /> site. Additionally, Stratus also destroyed monitoring well MW-5 and installed an air <br /> sparge well. <br /> The soil and groundwater investigation activities were consistent with the scope of work <br /> outlined in the April 28, 2000 workplan. The work performed included drilling two soil <br /> borings and converting them into groundwater monitoring wells, developing and purging <br /> the wells, and collecting soil and groundwater samples for laboratory analysis. Data <br /> gathered during the investigation was used to evaluate the extent of petroleum <br /> hydrocarbons in soil and groundwater. This report presents the activities performed <br /> during this investigation, soil and groundwater analytical data, boring logs and well <br /> installation details, and summarizes the findings. <br /> BACKGROUND <br /> A limited site investigation completed in March 1987, detected petroleum hydrocarbons <br /> in soil and groundwater beneath the site. The investigation included the drilling and <br /> sampling of four soil borings two of which were completed to groundwater monitoring <br /> wells (S-1 and S-2). In August 1987, three additional groundwater monitoring wells <br /> were installed. (MW-1, MW-2 and MW-3). <br /> Review of historical data indicates that the predominant groundwater flow direction is to <br /> the south and southwest. Depth of static groundwater at the site has ranged between 38 <br /> and 53 feet below ground surface(bgs). <br /> C:1My DocumentAUSMOVeport.doc stratus <br />