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w . <br /> �,ao"QNMENTAL COST pilosMANAGEMENT, <br /> Avenue,3525 Hyland I <br /> Main:(714)662-2752 Fax:1714)5152-2758 <br /> September 22, 2011 <br /> DECEIVED <br /> James Brownell, PG SEP 26 2011 <br /> Central Valley Regional Water Quality Control Board <br /> 11020 Sun Center Drive, #200 ENVIRONMENTAL HEALTH <br /> Rancho Cordova, CA 95670 PERMIUSERVICES <br /> Ref.: August 31, 2011 Response Letter from RWQQCB on M-10A Investigation Report <br /> Former Nestle USA, Inc. Facility <br /> Ripon, California <br /> Dear Mr. Brownell: <br /> This letter acknowledges our receipt of the August 31, 2011, response to the M-10A <br /> Investigation Report submitted by ECM on November 30, 2010. The letter requests additional <br /> investigation to further delineate the M-10A impacted area. The letter also requested that ECM <br /> submit, on behalf of Nestle, of seven geologic cross sections to the RWQCB in advance of <br /> developing a work plan for additional investigation. <br /> Responding to the letter, a conference was held on September 9, 2011. Participating on the call <br /> were you, John Vargas of ECM, and Peter Bennett of AMEC. The participants agreed that ECM <br /> will submit the cross sections and scope of work to complete the additional investigation <br /> simultaneously in an addendum to the M-1 OA work plan. <br /> Accordingly, ECM will submit a work plan with proposed locations of Cone Penetrometer Test <br /> (CPT) soundings on or before October 20, 2011, as an addendum to the earlier M-10A <br /> Investigation workplan submitted on June 11, 2010. This workplan will include all the requested <br /> cross sections. <br /> Should you have any questions, please call me at(661) 255-1693. <br /> With regards, <br /> Binayak Acharya <br /> Environmental Cost Management, Inc. <br /> cc: Marie Joachim— NUSA <br /> Distribution List <br />