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PUBLIC HtALTH SERVICES <br />SAN JOAQUIN COUNTY <br />ENVIRONMENTAL HEALTH DIVISION <br />Karen Furst, M.D., M.P.H., Health Officer <br />304 East Weber Avenue, Third Floor • Stockton, CA 95202 4`'FORN\ <br />209/468-3420 <br />THE EARTHGRAINS COMPANY C 0 Fly <br />THERESA LANCTOT <br />PO sox 1830 JAN 3 12000 <br />ST LOUIS MO 63118-0830 <br />Re: The Earthgrains Company (previously Rainbow Bakery) Site Code: 19093 <br />2651 S. Airport Way <br />Stockton, CA 95206 <br />San Joaquin County Public Health Services Environmental Health Division (PHS/EHD) <br />has reviewed the November 1999 Groundwater Monitoring Report dated January 7, 2000 <br />prepared by Phillips Services Corp. for the above referenced site. Continued and <br />increasing concentrations of groundwater contaminants and heretofore -undetected <br />concentrations of Tert-Butanol are evidenced by this report. Mitigation measures and <br />continued quarterly groundwater monitoring of all wells at this site will be necessary. <br />A Work Plan to compare at least two different remediation alternatives for mitigating <br />contamination in the soil and groundwater at this site should be submitted to PHS/EHD <br />by February 25, 2000. <br />If a Soil Vapor Extraction (SVE) and Air Sparging (AS) system is proposed, it will be <br />necessary to present all pertinent rationale to support this method. Pre and post treatment <br />plans to evaluate the effectiveness of the remediation, should be included in the Work <br />Plan. <br />Contact Carol Oz, Senior REHS at (209)468-3440 if you have questions regarding this <br />letter. Notify this office 48 hours in advance of the next sampling event. <br />Donna Heran, REHS, Director <br />Carol Oz, Senior REHS <br />Site Mitigation Unit IV <br />cc: Marty Hartzell-CVRWQCB <br />Mark Milward-Philip Services Corp. <br />��U <br />MargaiHS <br />Supervisor <br />A Division of San Joaquin County Health Care Services <br />