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MRR.30.2006 4:15PM RPE�E VIROTECH,INC. NO.248 P.2 <br /> 1 A • <br /> ////)AkPFMX 11244 pyrites Way•Cold Rim,(A 95670 <br /> Phone 916.851.0174• Fox 91&851.0177•Idl free 1.800.142.5249 <br /> March 30,2006 <br /> Mr.Michael Infuma <br /> San Joaquin County Environmental Health Department <br /> 304 East Weber Avenue, 3d Floor <br /> Stockton, California 95202 <br /> Subject: Interim Remediation Plan <br /> Flag City New West#1003 <br /> 6437 West Banner Street, Lodi, California 95242 <br /> Apex Project No.NWPOI.004 <br /> Dear Mr.Infurna: <br /> Apex Envirotech,Inc. (Apex)has been authorized by New West Stations (New West)to submit <br /> this letter addressing the interim remediation measures we discussed in our meeting earhe7today. <br /> Due to the length of time anticipated for approval of the NPDES permit,Apex has scheduled <br /> InStrat to perform batch extractions at the site starting the week of April 3,2006. <br /> Approximately 5,000 gallons of groundwater will be vacuum extracted from well EW-4 on a <br /> weekly basis. Apex personnel will be on-site during the extractions to record the volume of <br /> water extracted and collect two sets of groundwater samples, one pre-extraction and one post- <br /> extraction. These data will be tabulated and extraction mass will be calculated. Apex wiL <br /> submit this information to the San Joaquin County Environmental Health Department(SJCF:HD) <br /> in the quarterly monitoring reports. Batch extraction will continue until the groundwater <br /> pumping and treatment system is fully operational or until Apex and SJCEHD deem it is <br /> unnecessary. *If• <br /> Apex proposes to install additional monitoring wells on and off site to vertically and horizontally <br /> define the dissolved phase methyl tertiary butyl ether(MTBE)plume possibly associated with the <br /> New West site. Upon SJCEHD approval,Apex will prepare a workplan report detailing the . <br /> proposed well installations submitted by April 21, 2006. <br /> Michael S. Sgourakis will be Apex's new contact person for the site and will be responsible for <br /> managing the project with the assistance of Ms. Jennifer Worsley. <br />