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Page 25 of 37 <br /> alscience <br /> _nvironmental Quality Control - LCS/LCS Duplicate <br /> AM aboratories, Inc. �e <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 /> Date Date LCS/LCSD Batch <br /> Quality Control Sample ID Matrix Instrument Prepared Analyzed Number <br /> 099-12-796-4,754 Solid GUMS UU 05/05/11 05/05/11 110505L01 <br /> Parameter LCS%REC LCSD%REC %REC CL RPD RPD CL Qualifiers <br /> Benzene 98 99 78-120 1 0-20 <br /> Ethylbenzene 104 102 76-120 2 0-20 <br /> Toluene 100 99 77-120 2 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 />