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ENVIRONMENTAL HEALTH DEPARTMENT <br /> SAN JOAQUIN COUNTY <br /> Unit Supervisars <br /> Donna K. Heran, R.E.H.S. Carl Bergman, R.E.H. S. <br /> Director 304 East Weber Avenue, Third Floor g <br /> AI Olsen, R.E.H.S. Stockton, California 95202-2708 Mike Huggins, R.E.H.S., R.D.I. <br /> -- Douglas W. Wilson, R.E.H.S . <br /> c4C/ FOR�\PRogrnnr Manager <br /> Telephone: (209) 468-3420 Margaret Lagorio, R.E.H.S. <br /> Laurie A. Cotulla, R.E.H.S. <br /> Progrran Manager Fax: (209) 464-0138 Robert McClellon, R. E. H. S. <br /> Mark Barcellos, R.E.H.S. <br /> RAYMOND FARMER <br /> BESS FARMER <br /> 3810 FOURTEEN— MILE DR <br /> STOCKTON CA 95219 JAN 13 Zook <br /> RE: TOYOTA TOWN SITE CODE: 11 .51 <br />{ 610 HUNTER ST <br /> STOCKTON CA 95202 <br /> I <br /> San Joaquin County Environmental Health Department (EHD) has received <br /> and reviewed Third,QuarterMonitoring Report (report) dated December 16, 2003 <br /> prepared by ATC Associates Inc. (ATC) . Consistently high concentrations of <br /> petroleum hydrocarbons have been detected in groundwater samples of <br /> monitoring well MW-1 . ATC recommended connecting MW- 1 to the existing <br /> soil vapor extraction system to maximize the effect of the existing remediation <br /> system. ATC also recommended installing a stinger in MW-1 to accommodate <br /> the groundwater expected to be extracted out of MW- 1 . <br /> EHD agrees with ATC's recommendation to connect MW-1 to the existing <br /> remediation system (H&S 25299 . 37,subd. (c) (3)) . EHD requests the <br /> modification work be implemented before the end of the first quarter of 2004. <br /> Please notify EHD in advance the schedule when the work is to take place. <br /> Donna Heran, REHS, Director <br /> Environmental Health Division <br /> C' ' \ ` VV <br /> Jeffrey Wong , Senior REHS <br /> LOP/Site Mitigation Unit IV <br /> c: Drew Van Allen - ATC Associates Inc. (ATC) <br /> c: RWQCB, Central Valley Region — James L. L. Barton, RG <br />