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CalifornPegional WatoQuality Cool Board 111, <br /> xa, <br /> Central Valley Region Arnold <br /> Linda S.Adams Karl E. Longley,Sc D, P.E.,Chair <br /> Schwaaenegger <br /> S'ecrermT(or Goo emor <br /> 6nvro nienral Profecrion 11020 Sun Center Drive 4200,Rancho Cordova.California 95670-6114 <br /> Phone(916)464-3291 •FAX(916)464-4645 <br /> hap//www.walerboards.ca.gov/centralvalley <br /> 13 March 2009 <br /> DESJC, M.BENSON <br /> Defense Distribution Depot San Joaquin <br /> P.O. Box 960001 <br /> Stockton, CA 95296 <br /> REVIEW OF DRAFT FFA ANNUAL PROGRESS REPORT. OCTOBER 2007 THROUGH <br /> SEPTEMBER 2008, DEFENSE DISTRIBUTION DEPOT SAN JOAQUIN— SHARPE SITE <br /> California Regional Water Quality Control Board, Central Valley Region (Regional Water <br /> Board) staff has reviewed the Draft FFA Annual Progress Report.' October 2007 through <br /> September 2008 (Draft Report) dated November 2008 and received by electronic mail on <br /> 26 November 2008 and during a meeting on 14 January 2009. The Draft Report was <br /> prepared by URS Group, Inc., on behalf of Defense Logistics Agency Enterprise Support San <br /> Joaquin, California (DESJC) for the Defense Distribution Depot (DDJC) Sharpe site. <br /> Regional Water Board staff comments on the changes that DESJC has proposed to the <br /> frequency of sampling of groundwater wells for the 2009 monitoring program are presented <br /> below- <br /> 1. <br /> elow:1. Quarterly sampling of new monitoring wells MW325A, MW325B, and MW325C. Regional <br /> Water Board staff concurs; <br /> 2. Discontinue twice per year sampling of monitoring well MW412A. Regional Water Board <br /> staff concurs because this well is screened above the tetra chloroethene plume and <br /> adjacent well MW412B is screened within the plume; <br /> 3. Begin sampling monitoring well MW447C and MW447CD annually. Regional Water <br /> Board staff concurs; <br /> 4. Discontinue quarterly sampling of monitoring wells MW527B, MW527C, and MW527D. <br /> Regional Water Board staff concurs because these wells are within a roadway and will be <br /> replaced with the wells listed below in proposed change 5, at a safer location; <br /> 5. Quarterly sampling of replacement monitoring wells MW527BR, MW527CR, and <br /> MW527DR. Regional Water Board staff concurs with the locations proposed. See <br /> proposed change 4, above; <br /> 6. Quarterly sampling of new monitoring wells MW534B, MW534C, and MW534D. Regional <br /> Water Board staff concurs; <br /> 7. Discontinue sampling of private water supply well PW010. During the 14 January 2009 <br /> Remedial Project Manager meeting held at the URS office in Sacramento, it became <br /> apparent that there is confusion regarding the sampling of this well. Apparently the well <br /> owner's attorney had sent a letter to DESJC stating that the well was no longer to be <br /> California Environmental Protection Agency <br /> ed Recycled Paper <br />