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_ Stantec Consulting Corporation <br /> 3017 Kilgore Road Suite 100 <br /> Rancho Cordova CA 95670 <br /> Tel:(916)861-0400 <br /> Fax:(916)861-0430 <br /> Stantec <br /> April 13, 2009 <br /> Mr. Brian Taylor <br /> California Regional Water Quality Control Board —Central Valley Region <br /> 11020 Sun Center Drive, #200 <br /> Rancho Cordova, California 95670 <br /> RE: Response to RWQCB March 11, 2009 Letter <br /> Stockton Terminals Technical Committee Facilities <br /> Port of Stockton <br /> Stockton, California <br /> Stantec Project No. 185702030.200.011 <br /> Dear Mr. Taylor: <br /> On behalf of the Stockton Terminals Technical Committee (STTC), Stantec Consulting Corporation <br /> (Stantec) submits this Response to the March 11, 2009 Regional Water Quality Control Board <br /> (RWQCB) letter entitled Pilot Study Work Plan and Annual Report (Letter). The Letter summarized <br /> information from Stantec's January 29, 2009 Pilot Study Work Plan and Revised Contingency Plan, <br /> some of the additional documents listed in Attachment 1 that relate to the recent well installations, <br /> and presented a series of comments on the recent and proposed work. The Letter and this <br /> Response reference some of the documents (included in Attachment 1) along with a summary of <br /> the recent communications and meetings, which pertain to the recent and proposed work. <br /> EXECUTIVE SUMMARY- <br /> STTC presents this Response to the RWQCB's March 11, 2009 Letter. The recent regulatory <br /> history pertaining to the proposed pilot study for well TS/MW-3D are briefly summarized in <br /> Attachment 1. This Response addresses the RWQCB Letter and numbered Comments with <br /> several points of clarification where appropriate and outlines relevant data to present STTC's <br /> perspective where STTC's with the opinions presented in the RWQCB Letter. <br /> COMMENTS ON THE RWQCB LETTER <br /> In this section, selected RWCQB comments are repeated in bold with Stantec's response below. <br /> The numbered comments are keyed to the numbers in the RWQCB letter and not all comments <br /> warranted a response. <br /> The RWQCB states the following on Page 1, Paragraph 2: Between September and <br /> October 2008, STTC installed seven wells (PS/MW-20A through PS/MW-20D, OW-31011, <br /> OW-3DR, and TS/MW-3D) to evaluate whether groundwater pollution observed in <br /> downgradient well OW-5D emanates from the STTC facilities. The 15 December 2008 <br /> 1:\STTC-Stockton\Reports\Response to Comments\RWQCB Letter 3-11-09\STTC Response to RWQCB 3-11-09 Letter Final.doc <br />