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Page 30 of 45 <br /> alscience <br /> _nvironmental Quality Control - LCS/LCS Duplicate <br /> AN aboratories, Inc. <br /> Q n e <br /> GeoSyntec Consultants Date Received: N/A <br /> 475 14th Street, Suite 450 Work Order No: 08-07-2668 <br /> Oakland, CA 94612-1940 Preparation: EPA 504.1 Ext. <br /> Method: EPA 504.1 <br /> Project: W FS - Stockton <br /> Date Date LCS/LCSD Batch <br /> Quality Control Sample ID Matrix Instrument Prepared Analyzed Number <br /> 099-12-520-122 Aqueous GC 40 08/04/08 08/05/08 080804L01 <br /> Parameter LCS%REC LCSD%REC %REC CL RPD RPD CL Qualifiers <br /> 1,2-Dibromoethane 84 86 60-140 2 0-25 <br /> 1,2-Di bromo-3-Chloropropane 88 88 60-140 1 0-25 <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 />