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Mr. James Taylor 9 - 2 - . 16 September 2009 <br /> The pilot study showed that reinjection of groundwater did not increase water surface <br /> elevations for the extraction/injection rates that were tested, which were as high as about <br /> 6 gpm. The reinjection of groundwater into the zero valent iron formation appears to be <br /> responsible for dramatically reducing the concentration of all of the constituents of concern in <br /> MW-10B, which is near and downgradient of the injection point of the pilot study <br /> injection/extraction well pair. <br /> Notice of Intent <br /> In addition to the updated Work Plan, the Notice of Intent included historical and current water <br /> quality data, a proposed monitoring and reporting program, groundwater model calibration, a <br /> draft fact sheet, and referred to background water quality presented in the 2007 Work Plan. <br /> Continental also provided an Initial Study pursuant to the California Environmental Quality Act, <br /> and circulated a fact sheet describing the groundwater recirculation pilot test and the proposed <br /> work plan. It appears that the proposed work plan qualifies for coverage under the In-Situ <br /> General Order. Please provide to Central Valley Water Board staff an application fee of $2520 <br /> payable to the State Water Resources Control Board. <br /> Central Valley Water Board staff conditionally concur with the updated Work Plan as <br /> described in the Notice of Intent, subject to the following conditions: <br /> • A Notice of Applicability is issued to Continental Grain Company by the Central Valley <br /> Water Board Executive Officer. <br /> When Continental receives the Notice of Applicability and the Monitoring and Reporting <br /> Program, it may operate both recirculation systems simultaneously. If you have any <br /> questions, you may contact me by telephone at (916) 464-4680 or by email at <br /> aterr II@wate oards.ca.gov. <br /> nnnn l `' <br /> AMY TER ELL <br /> Private Sites Cleanup Unit <br /> cc: Ms. Lori Duncan, San Joaquin County EHD, Stockton <br /> Ms. Linda Huff, Huff & Huff Inc., Oak Brook IL <br /> Mr. Robert Marty, Advanced GeoEnvironmental Inc., Stockton <br />