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Page 24 of 37 ' <br /> aiscience <br /> j_nvironmental Quality Control - LCS/LCS Duplicate <br /> aboratories, Inc. <br /> SAIC Date Received: N/A <br /> 1000 Broadway, Suite 675 Work Order No: 11-05-0194 <br /> Oakland, CA 94607-4099 Preparation: EPA 5030C ' <br /> Method: EPA 8260B <br /> Project: TRACY PUMP STATION / 26011S154A-R10-410 ' <br /> Quality Control Sample IDDate Date LCS/LCSD Batch <br /> Matrix Instrument Prepared Analyzed Number ' <br /> 099.12-796-4,751 Solid GC/MS UU 05/04/11 05/04111 110504L03 <br /> Parameter LCS%REC LCSD%REC %REC CL RPD RPD CL Qualifiers ' <br /> Benzene 92 93 78-120 1 <br /> 0-20 <br /> Ethylbenzene 96 95 76-120 2 0-20 <br /> Toluene 93 95 77-120 2 0-20 , <br /> 1 <br /> RPD-Relative Percent Difference CL-Control Limit ' <br /> 7440 Lincoln Way, Garden Grove, CA 92841-1427 . TEL (714) 895-5494 . FAX: (714) 894-7501 <br /> 1 <br />