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E.Mawo O. BROWN in. <br /> �A', avfxwo„ <br /> oAuroawu <br /> Water Boards `�./ MVIrHnNR�wia°ECnON <br /> WwufNrxt mp <br /> Central Valley Regional Water Quality Control Board <br /> 23 August 2012 <br /> Mr. Joe Niland <br /> Lincoln Center Environmental Trust <br /> c/o Geosyntec Consultants <br /> 3043 Gold Canal Drive, Suite 201 <br /> Rancho Cordova, CA 95670 <br /> COMMENTS ON PRE-DESIGN INVESTIGATION WORK PLAN— LINCOLN CENTER <br /> ENVIRONMENTAL TRUST, STOCKTON, SAN JOAQUIN COUNTY <br /> Central Valley Regional Water Quality Control Board (Central Valley Water Board) staff has <br /> reviewed the report titled "Pre-Design Investigation Work Plan"(Plan) dated 12 June 2012 <br /> prepared by Geosyntec Consultants on behalf of the Lincoln Center Environmental Remediation <br /> Trust (Trust). Central Valley Water Board staff and the Trust met on 2 July 2012 to discuss the <br /> Plan. <br /> The Plan proposes to perform additional characterization of the down-gradient soils and <br /> groundwater in accordance with Table 1 (attached). A total of nine groundwater monitoring <br /> wells are proposed to be installed in the A and B zones down-gradient of the source area. Soil <br /> samples will be collected from the well borings and analyzed for geochemical characteristics. <br /> The Trust intends to use the collected data to prepare a remedial design for the down-gradient <br /> perchloroethene (PCE) impacts in groundwater. <br /> Central Valley Water Board staff and the Trust have prepared a Public Notice regarding the <br /> proposed work. The Trust has submitted a distribution list containing names and addresses that <br /> will receive the Notice. We will also post the Notice on our Geotracker website: <br /> http://geotracker.waterboa rds.ca.gov/profi le_report.asp?g lobal_i d=S L205132997 <br /> Central Valley Water Board staff concurs with the Plan. Please submit a report of findings by <br /> 5 November 2012. Be sure to contact us 7 days prior to the start of field work so that we have <br /> the opportunity to be present during the investigation. <br /> Feel free to contact me with any questions or concerns regarding this letter at 916.464.4682 or <br /> rcervantesO-waterboards ca goy. <br /> — original signed by— <br /> Roberto Cervantes, PE <br /> Site Cleanup Program <br /> KARL E. LONGLEV SCD, P.E.,CHAIR I PAMELA.C. CREEDON P.E.. BCEE. EXECUTIVE Off ICER <br /> 11020 Sun Center Drive#200.Ranc"Cordova,CA 95670 1 www.water ard5.ca.9av/cent arvalley <br /> ��wFCVCIfe vAV[w <br />