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C A M B R I A <br /> detected in the deep groundwater sample These activities are summarized in Cambria's June 25,2001 <br /> Site Investigation Report <br /> 2001 Well Installation and Soil Vapor Extraction (SVE) Test. During November 2001, Cambria <br /> installed vapor extraction wells VE-1 and VE-2, located near well MW-5 and boring SB-6, and <br /> conducted a 5-day SVE test using these wells Cambria estimates that approximately 13 6 pounds of <br /> TPHg and 5 0 pounds of MTBE were removed over the duration of the SVE test During December <br /> 2001,Cambria installed a third vapor extraction well(VE-3),located adjacent to well MW-5,which <br /> also served as a confirmation boring MTBE was not detected in soil samples from VE-3,compared <br /> to MTBE concentrations up to 25 4 ppm in well boring MW-5 These activities are documented in <br /> Cambna's May 17, 2002 Site Investigation and Soil Vapor Extraction Test Report <br /> Groundwater Monitoring Program• There are two groundwater monitoring wells onsite(MW-5 and <br /> MW-8) and one offsite well in the bicycle lane of West Kettleman Lane(MW-6) These wells are <br /> currently sampled quarterly Dunng the third quarter 2002 sampling event, no TPHg, BTEX, or <br /> MTBE were detected in the wells <br /> . Soil analytical data and sample locations from the investigations described above are included in <br /> Attachment B Groundwater analytical results and the third quarter 2002 groundwater elevation <br /> contour map are included in Attachment C <br /> SITE CONDITIONS <br /> Ldhology Native sediments underlying the site consist of predominantly silt(ML), silty sand(SM), <br /> and sand(SP)to a maximum depth explored of 100 fbg Boring logs are included in Attachment D <br /> and a geologic cross section is presented in Attachment E <br /> Hydrogeology: Depth to groundwater beneath the site has ranged from 54 to 60 fbg Typically the <br /> groundwater flow direction beneath the site is towards MW-8 Regional groundwater flow varies <br /> Groundwater depth and elevation data and the most recent groundwater contour map are mcluded in <br /> Attachment C <br /> Hydrocarbon Distribution in Soil Soil analytical results from investigations including, and <br /> subsequent to,the tank removal activities during January 1999 demonstrate that the residual petroleum <br /> hydrocarbons and MTBE in soil are limited to the northwestern dispenser area TPHg and BTEX are <br /> fully delineated around this dispenser by borings SB-1,SB-2(MW-5),and SB-6 through SB-9 Prior <br /> 1346 3 <br />