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Page 9 of 20 <br /> ' alscience <br /> nvironmental Quality Control - Spike/Spike Duplicate <br /> aboratories, Inc. <br /> ' SAIC Date Received: 05/28/11 <br /> 1000 Broadway, Suite 675 Work Order No: 11-05-1798 <br /> Oakland, CA 94607-4099 Preparation: EPA 5030C <br /> Method: EPA 8260B <br /> ' Project TRACY PUMP STATION / 26011 S154A-R10-410 <br /> Date Date MS/MSD Batch <br /> Quality Control Sample ID Matrix Instrument Prepared Analyzed Number <br /> 11-06-0269-1 Solid GUMS Z 06/03111 06105/11 110604501 <br /> Parameter MS%REC MSD%REC %REC CL RPD RPD CL Qualifiers <br /> Benzene 84 84 61-127 1 0-20 <br /> t Ethylbenzene 92 98 57-129 6 0-22 <br /> Toluene 86 90 63-123 4 0-20 <br /> 1 <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 />