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M.J. Kloberdanz & A.dsociates Post Office Box 576981 <br /> Modesto, CA 95357-6981 <br /> Environmental Services Phone: (209)577-8186 <br /> Fax: (209)577-8158 <br /> Lori Duncan April 20, 2001 <br /> San Joaquin County <br /> Environmental Health Division <br /> P.O. Box 2009 <br /> Stockton, California 95201 <br /> RE: March Quarterly Groundwater Monitoring Report <br /> McDowell & Davis Towing, 1360 Escalon Avenue, Escalon, California <br /> Please find enclosed a copy of our report for the recent groundwater-monitoring event at <br /> the above referenced site. Only trace (near detection limit) levels of toluene were found <br /> in two of the wells. We are recommending another round of sampling to confirm this <br /> finding prior to proposing closure of the site. <br /> Additional cement/grout was added to MW-1 by the driller to prevent migration of <br /> surface waters into the traffic box. The sampler and anyone else removing the lids to the <br /> traffic boxes will be instructed to clean the rubber gasket before closing the box. <br /> Sincerely, <br /> Michael J. Kloberdanz, RE S, REA <br /> M.J. Kloberdanz &Associates <br />