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Californialegional Water Quality Comol Board <br /> Central Valley Region (a <br /> Linda S.Adams Karl E.Longley,ScD P.E. Chair Arnold <br /> Secretaryfor g y' ' ' Schwarzenegger <br /> Environmental <br /> Protection Sacramento Main Office Governor <br /> 11020 Sun Center Drive#200,Rancho Cordova,California 95670-6114 <br /> Phone(916)464-3291• �91�}4¢1-4645 <br /> http://www.wa[erboard fc . py/ ,nti IIF <br /> J.4Pi : 4 <br /> 9 January 2008htOU +llt^Ji}IFGtf <br /> ..4,41],/S�ui/Irre <br /> Jry <br /> DDJC-FA/Marshall Cloud <br /> Defense Distribution Depot San Joaquin <br /> P.O. Box 960001 <br /> Stockton, CA 95296 <br /> DRAFT REMEDIAL ACTION REPORT, SITE-26, AREA 6, DEFENSE DISTRIBUTION <br /> DEPOT SAN JOAQUIN— SHARPE SITE, SAN JOAQUIN COUNTY <br /> California Regional Water Quality Control Board, Central Valley Region (Regional Water <br /> Board) staff has reviewed the report entitled: Draft Operable Unit 2 Metals Remedial Action <br /> Report, Site-26, Area 6, (Report) dated 30 October 2007. URS Group Inc., (URS) prepared <br /> the Report on behalf of Defense Logistics Agency San Joaquin (DESJC) formerly the <br /> Defense Distribution Depot, San Joaquin (DDJC), for work that was performed at their <br /> Sharpe site in Lathrop, San Joaquin County. The purpose of the Report is to present a <br /> summary of the characterization and removal of metals-contaminated soil beneath <br /> Site 26, Area A, and to seek concurrence from the US Environmental Projection Agency <br /> (EPA), the California Department of Toxic Substances Control (DTSC), and the Regional <br /> Water Board that the remedial action has been completed. The Regional Water Board <br /> concurs. <br /> In February 2007, DESJC submitted a Technical Memorandum prepared by URS entitled: <br /> DDJC—Sharpe, Site-26, Area 6, Results of Excavation Confirmation Sampling and Waste <br /> Disposal Characterization, dated 12 February 2007. The purpose of the Technical <br /> Memorandum was to seek concurrence from EPA, DTSC, and the Regional Water Board <br /> that the removal action had been completed and the excavation could be backfilled. DTSC, <br /> EPA, and Regional Water Board staff concurred in electronic messages dated March 14, 15, <br /> and 16, 2007, respectively. On 2 April 2007, the Regional Water Board followed the <br /> electronic message with a review letter. <br /> SUMMARY OF 12 FEBRARY 2007 TECHNICAL MEMORANDUM <br /> This section is a Regional Water Board staff summary of the removal action, first presented <br /> in our review letter dated 2 April 2007 for the 12 February 2007 DESJC Technical <br /> Memorandum. <br /> Prior to excavation activities, a length of railroad track was removed and stored for later <br /> reinstallation. During excavation activities, approximately 90 cubic yards of soil were <br /> California Environmental Protection Agency <br /> :fid Recycled Paper <br />