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Page 21 of 37 <br /> ' L alscience <br /> =nvironmental Quality Control - Spike/Spike Duplicate <br /> rw 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 /> Date Date MS/MSD Batch <br /> Quality Control Sample ID Matrix Instrument Prepared Analyzed Number <br /> 11-05-0280-13 Solid GUMS UU 05105111 05/05111 110505501 <br /> ' Parameter MS%REC MSD%REG %REC CL RPD RPD CL Qualifiers <br /> Benzene 87 94 61-127 8 0-20 <br /> ' Ethylbenzene 90 96 57-129 7 0-22 <br /> Toluene 87 94 63-123 8 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 />