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Tosco Corporation,a subsidiary of Pbilhps Petroleum Company 6 <br /> Tosco Station#1205,16470 Cambnd a Street,Lathrop CA lune 26,2002 <br /> • SUMMARY OF FINDINGS <br /> From March 25 through 29, 2002, SECOR performed DPE event at the site The results <br /> of the DPE event are as follows <br /> • Vapor extraction flow rates ranged from 15 26 scfm to 166 20 scfm at <br /> vacuums ranging from 15 inches of mercury to 26 inches of mercury for the <br /> five day DPE test <br /> • Groundwater extraction flow rates ranged from 0 gpm to 5 5 gpm for the five <br /> day DPE test <br /> • During the DPE event approximately 304 84 pounds of TPHg, 132 pounds of <br /> benzene, and 0 07 pounds of MtBE were extracted from the soil beneath the <br /> site <br /> • During the DPE event approximately 11,870 gallons of groundwater was <br /> extracted Laboratory analysis of extracted groundwater detected TPHg at a <br /> concentration of 3,300 ppb <br /> • The radius of influence was graphically determined to be less than 71 feet for <br /> extraction well MW-6 <br /> • <br />