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ST 717-U-5 <br /> ENVIRory ENTAL INC 3330 Cameron Park Drive Ste 550 <br /> OCT 0 1 2004 Cameron Park California 95682 <br /> (530)616-6004-Fax (530)676-6005 <br /> ENVIRONMENT HEALTH <br /> PERMIT/SERVICES <br /> September 28, 2004 <br /> Project No 2003-15600-01 <br /> Ms Margaret Lagono <br /> San Joaquin County Public Health Services <br /> Environmental Health Division <br /> 304 E Weber Street, Third Floor <br /> Stockton, California 95202-2708 <br /> Re Dual Phase Extraction Test Report <br /> Joe's Truck Plaza <br /> 15600 Harlan Road <br /> Lathrop, California <br /> Dear Ms Lagono <br /> t� Stratus Environmental, Inc (Stratus) has prepared this report on behalf of Mr Kashman <br /> Singh and Mr Dalwinder Dhoot, to present the results of dual phase extraction (DPE) <br /> feasibility testing conducted at Joe's Truck Plaza, located at 15600 Harlan Road, Lathrop, <br /> California (see Figure 1) The DPE feasibility test was conducted in accordance with <br /> Stratus' Work Plan for Additional Assessment, dated October 21, 2003 <br /> The DPE feasibility test was completed between June 14 and 16, 2004, using well MW-7, <br /> located east of the former northern underground storage tank (UST) pit The purpose of <br /> the DPE test was to evaluate the feasibility of simultaneously extracting residual and <br /> dissolved petroleum hydrocarbons from beneath the site This report presents the test <br /> procedures used, results of the tests, and a discussion of the feasibility testing results <br /> Low concentrations of petroleum hydrocarbons were observed in the extracted soil <br /> vapors and groundwater during the test, consistent with the residual mass of petroleum <br /> hydrocarbons in the subsurface Test results indicate that DPE is technically viable, but <br /> not a cost effective remedial alternative <br /> SITE DESCRIPTION <br /> The subject site is an active service station located at the southeast corner of the <br /> intersection of J Street and Harlan Road in Lathrop, California The current station <br /> configuration consists of a station building, four dispenser islands intended for <br /> automobile refueling, seven dispenser islands intended for large truck refueling, four <br /> 10,000-gallon above ground tanks used to store diesel, one 12,000-gallon UST, one <br /> P Voe s Truck Plaza\Reports\DPE TestVoes Truck DPE Test Report doc <br />