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k-uniUrrin; megio al VVHtef VUd11ty I-UUII_Ul DUarU <br /> Central Valley Region <br /> s u ' <br /> Kart E. Longley,ScD,P.E.,Chair <br /> Linda S.Adams Arnold <br /> Secretaryfor Sacramento Main Office Sch AArnold <br /> Gnvironmenlal 11020 Sun Center Drive#200,Rancho Cordova,California 95670-6114 ggcr <br /> Protection Phone(916)464.3291•FAX(916)464.4645 Governor <br /> littp://WrNv.waterboards.ca.gov/centralvalle.y <br /> 13 February 2008 <br /> Mr. James Taylor <br /> ContiGroup Companies <br /> AON Center <br /> 200 E. Randolph, Suite 1900 <br /> Chicago IL 60601 <br /> CONCURRENCE WITH WELL INSTALLATION WORK PLAN, CONTINENTAL GRAIN, <br /> 9504 S. HARLAN ROAD, SAN JOAQUIN COUNTY <br /> Thank you for providing the 1 February 2008 Well Installation Work Plan (Work Plan) prepared <br /> by your consultant, Huff & Huff Inc., for installation of injection, extraction, and monitoring wells <br /> at the French Camp Grain Elevator. The Work Plan conforms to the October 2007 Pilot Study <br /> Work Plan and Central Valley Regional Water Quality Control Board (Regional Water Board) <br /> staff's 5 December 2007 Groundwater Recirculation Pilot Study concurrence letter. When the <br /> pilot study is underway, groundwater downgradient of the existing zero valent iron injections <br /> will be extracted and reinjected into the iron. In the Work Plan, two injection wells, two <br /> extraction wells, and one monitoring well are proposed. All wells are designed to intercept the <br /> second water-bearing zone at about 80 feet below ground surface. <br /> Regional Water Board staff concur with the Work Plan as proposed. Oversight of the <br /> installation shall be conducted by San Joaquin County Environmental Health Department. <br /> According to the proposed schedule, installation is to begin 21 April 2008, coinciding with a <br /> slow business cycle at the French Camp Grain Elevator. A Well Installation Report should be <br /> provided by 13 June 2008, which should include well boring logs, water quality data, as-built <br /> construction diagrams, any difficulties with installation or deviations from the work plan, and <br /> any other pertinent details. If you have any questions, you may contact me by telephone at <br /> (916) 464-4680, by email at aterrellCdwaterboards.ca.gov, or by postal mail at the letterhead <br /> ad ress. •' <br /> l <br /> AMY` TERRELL <br /> Private Sites Cleanup Unit <br /> cc: Mr. Michael Infurna, San Joaquin County Environmental Health Department, Stockton <br /> Ms. Linda Huff, Huff and Huff, Oak Brook IL <br /> Mr. Robert Marty, Advanced GeoEnvironmental, Inc., Stockton <br /> California Environmental Protection Agency <br /> ce Recycled Paper <br />