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Page 20 of 37 ' <br /> &, alscience <br /> nvironmental Quality Control - Spike/Spike Duplicate i <br /> aboratories, Inc. <br /> SAIC Date Received: 05/04/11 ' <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 ID Matrix Instrument Date Date MS/MSD Batch <br /> Prepared Analyzed Number <br /> SB-24.3' Solid GC/MS UU 05/04111 05/05/11 110504502 <br /> Parameter MS%REC MSD%REC %REC CL RPD RPD CL Qualifiers <br /> Benzene 99 88 61-127 12 0-20 <br /> Ethylbenzene 101 88 57-129 14 0-22 <br /> Toluene 98 87 63-123 11 <br /> 0-20 <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 />