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Page 23 of 45 <br /> alscience <br /> nvironmental Quality Control - Spike/Spike Duplicate '� �r <br /> AN aboratories, Inc. <br /> ne <br /> GeoSyntec Consultants Date Received: 07/31/08 <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 /> Proiect WFS - Stockton <br /> Date Date MS/MSD Batch <br /> Quality Control Sample ID Matrix Instrument Prepared Analyzed Number <br /> 08-08-0026-2 Aqueous GC 40 08/04/08 08/05/08 080804S01 <br /> Parameter MS%REC MSD%REC %REC CL RPD RPD CL Qualifiers <br /> 1,2-Dibromoethane 92 78 60-140 11 0-25 <br /> 1,2-Dibromo-3-Chloropropane 135 117 60-140 9 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 />