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202 Val Dervin Parkway, Suite #400, Stockton, California 95206 <br /> C®NEST®GA-ROVERS Telephone: 209-983-6810 Facsimile: 209-983-6960 <br /> & ASSOCIATES <br /> November 22,2006 NQV 2 Z��b Ref. No. 000197 <br /> �•� �v1ENT '�IE��ZK <br /> E"v1,�,JN1�IS�RVICES <br /> pER� <br /> Mr. Steven Meeks <br /> Central Valley Regional Water Quality Control Board <br /> 11020 Stun Center Dr., Ste. 200 <br /> Rancho Cordova,CA 95827-3098 <br /> Re: Response to October 23,2006 Regional Water Quality Control Board Correspondence <br /> Former Occidental Chemical Corporation Groundwater Treatment Facility, Lathrop, <br /> San Joaquin County,California <br /> Dear Mr. Meeks: <br /> Conestoga-Rovers &Associates on behalf of Miller Springs Remediation Management, Inc. <br /> (MSRMI) would like to thank you,and other members of the California Regional Quality <br /> Control Board (Board) for the detailed response to MSRMI's 2006 Annual Review Meeting <br /> Minutes and the comments on the 2006 Semi-Annual Report that were submitted to your office <br /> on August 9,2006 and Aug-List 15,2006 respectively. After reviewing your October 23, 2006 <br /> letter,MSRMI would like to provide the following response. <br /> As stated in the letter, the Board has requested the preparation of two work plans to be <br /> submitted by December 15,2006. These plans are to address potential fumigant and Sulfolane <br /> residual sources in the vicinity of monitoring well PW-18 and the use of supplemental treatment <br /> in the existing groundwater treatment system. Given the level of effort that will be required to <br /> adequately prepare these work plans;and that current efforts are focused on the completion of <br /> the 2006 Annual Report,MSRMI would like to request an extension to the December 15, 2006 <br /> submittal date. MSRMI proposes that both work plans in a single combined plan,be submitted <br /> to the Board by March 30,2007. In addition, a written response addressing the other items <br /> outlined in your letter will be submitted at that time. <br /> Regarding the 2006 Annual Report submittal date of February 01,2007 noted on page six of <br /> your letter,both the Annual and Semi-Annual Report submittal dates have been extended by <br /> two weeks, (i.e. February 15th and August 15th respectively). The approval of this extension was <br /> documented in the 2005 Annual Review Meeting Minutes. <br /> Equal EeEo o <br /> Employment IS0 9001 <br /> Opportunity Employer EN—EE—G nC31e <br /> Worldwide Engineering, Environmental, Construction,and IT Services <br />