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Page 10 of 19 , <br /> !!science <br /> Z nvironmental Quality Control - Spike/Spike Duplicate <br /> mw aboratories, Inc. nel ..c <br /> SAIC Date Received: 05/26/11 ' <br /> 1000 Broadway, Suite 675 Work Order No: 11-05-1633 <br /> Oakland, CA 94607-4099 Preparation: EPA 5030C <br /> Method: EPA 8260B <br /> Project TRACY PUMP STATION / 26011S154A-R10-410 <br /> Date Date MS/MSD Batch <br /> Quality Control Sample ID Matrix Instrument Prepared Analyzed Number <br /> SB-39-9.5' Solid GC/MS S 05/20/11 05/31/11 110531501 <br /> Parameter MS%REC MSD%REC %REC CL RPD RPD CL Qualifiers ' <br /> Benzene 96 93 61-127 3 0-20 <br /> Elhylbenzene 90 87 57-129 3 0-22 , <br /> Toluene 97 93 63-123 4 0-20 <br /> 1 <br /> RPO-Relative Percent Difference CL-Control Limit , <br /> �� 7440 Lincoln Way, Garden Grove, CA 92841-1427 . TEL:(714) 895-5494 FAX: (714) 894-7501 ' <br />