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ENVIRONMENTAL HEALTH DEPARTMENT <br /> SAN JOAQUIN COUNTY <br /> a � <br /> Unit Supervisors <br /> < Donna K.HerAa,RE.H.S. 304 East Weber Avenue,Third Floor Carl Borgtnan,RE.H.S. <br /> Director Mike Huggins,R.E.H.S.,R.D.I. <br /> • Al Olsen,RE.H.S. Stockton, California 95202-2708 <br /> c�•: � ro Douglas W.Wilson,R.E.H.S. <br /> P <br /> Laurie Cm otManager <br /> ulls,Ra er E.H.S. Telephone: (209)468-3420 Margaret Lagorio,R.E.H.S. <br /> Program Manager Fax: (209) 464-0138 Robert McClellon,R.E.H.S. <br /> g g Mark Barcellos,R.E.H.S. <br /> JUN 2 3 2003 <br /> DOUG STIDHAM RIILJIT MANGAT <br /> CITY OF LSCALON 622 CLAY NAY <br /> PO BOX 248 RIPON CA 95366 <br /> ESCALON CA 95320 <br /> RE: South County Food & Fuel SITE CODE: 1487 <br /> 1305 Escalon Avenue <br /> Escalon CA 95320 <br /> San Joaquin County Environmental Health Department (SJCIEHD) has read "Work Plan <br /> —Treatment System Feasibility Study" dated June 6, 2003, prepared on your behalf by <br /> Geological Technics Inc. (GTI), and has the following comments. <br /> The work plan proposes that GTI will examine three different methods of contaminant <br /> destruction to be used with the soil vapor extraction system. SJCIEHD had previously <br /> suggested this be done, it is a natural progression in the operation of a remediation <br /> system of this type, and agrees with the proposal. However, further feasibility studies <br /> are not necessary. It should be a simple matter to evaluate the influent air contaminant <br /> concentrations that have been documented during the system operation, and <br /> determining if it would be appropriate at this time to switch to a less aggressive system <br /> of contaminant destruction. Once a decision has been made, please give written <br /> notification to SJCIEHD of which method will be used, and restart the system. The <br /> system has been out of operation for almost five months at this time. Resumption of the <br /> remediation should begin as soon as possible. <br /> Donna Heran, RENS, Director <br /> Environmental Health Department <br /> oeG <br /> Lori Duncan, Senior REHS Nuel C. Henderson,Jr., RG <br /> LOP/Site Mitigation Unit IV LOP/Site Mitigation Unit IV <br /> cc: James Barton, CVRWQCB <br /> Ray Kablanow, GTI <br />