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California Regional Water Quality Control Board <br /> Central 'Valley Region) <br /> Robert Schneider,Chair <br /> Alaa C.Lloyd Ph.D, Arnold Schwarzertegger <br /> Secretary for Sacramento Main Office Governor <br /> EnVlroamentol Imemet Add=! hupWwww.waterboards.n,gov/tenualvoHey <br /> Proteetlon 11020 Sun Cenw Drive#200 Rancho Cordova,CA 95670.6114 <br /> Phone(916)464•1291 Far(916)4644797 <br /> 13 January 2005 <br /> Mr.Thomas Bauhs <br /> Chevron Environmental Management Company <br /> P.O.Box 6012 <br /> San Ramon,CA 94583.0904 <br /> REVIEW OFREPORTS,SOUTHSHORE PARCEL PARCEL 2A,L&M OPERABLE UNIT, <br /> STOCKTON,SAN JOA QUIN COUNTY <br /> Staff of the Central Valley Regional Water Quality Control Board(Regional Board)and Department of <br /> Toxic Substances Control(DTSC)reviewed the following reports submitted by SECOR international <br /> Incorporated (SECOR)on behalf of the L&M Operable Unit(OU)for a portion of Parcel 2A of the <br /> South Shore Parcels along West Weber Avenue is Stockton(site): <br /> • 30 April 2004 First Quarter 2004 Site Status and Groundwater Monitoring.Report(First QMR); <br /> • 30 August 2004 Remedial System Startup Report(Startup Report); <br /> • 29 October 2004 Third Quarter 2004 Site Status and Groundwater Monitoring Report(Third <br /> QMR);and <br /> • 22 December 2004 Interim Pipeline Removal and Abandonment and Soil Excavation Resort <br /> (Interim Report). <br /> The First and Second QMRs discuss the groundwater monitoring activities conducted in February and <br /> September,respectively,the trends in separate phase hydrocarbons,deep zone pollutants,arsenic <br /> concentrations,and status of remedial activities. The Startup Report discusses the startup of the dual <br /> phase extraction system,which was later shut dawn due to safety concerns associated with the proposed <br /> excavation activities at the site. The Interim Report,provided as a brief summary,discusses the soil <br /> excavation and pipeline removal and abandonment activities conducted at the site. The L&M OU will <br /> provide a final and complete report by 10 February 2005,as requested in Regional Board staffs <br /> 14 May 2004 letter. <br /> The following are Regional Board and DTSC comments on the First QMR and Startup Report: <br /> 1. The figures in the First QMR that listed concentrations of constituents detected that quarter differ <br /> from the concentrations listed in the table and analytical reports. Although this did not occur in <br /> subsequent quarterly monitoring reports,we provide this comment to remind you of the <br /> importance of quality assurance and quality control(QA/QC)checks of each report submittal. <br /> California Environmental Protection Agency <br /> %I Reeyded Paper <br />