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Page 24 of 35 <br /> alscience <br /> _nvironmental Quality Control - Spike/Spike Duplicate <br /> AN aboratories, Inc. �e <br /> GeoSvntec Consultants Date Received: N/A <br /> 475 14th Street, Suite 450 Work Order No: 08-05-1902 <br /> Oakland, CA 94612-1940 <br /> Proiect: WFS - Stockton <br /> Matrix: Aqueous <br /> Quality Control Date Date MS% MSD% %REC RPD <br /> Parameter Method Sample ID Analyzed Extracted REC REC CL RPD CL Qualifiers <br /> Chloride EPA 300.0 08-05-1796-2 05/21/08 N/A 94 95 56-134 1 0-3 <br /> Nitrite(as N) EPA 300.0 08-05-1796-2 05/21/08 N/A 94 94 68-122 1 0-8 <br /> Nitrate(as N) EPA 300.0 08-05-1796-2 05/21/08 N/A 96 96 58-142 0 0-6 <br /> o-Phosphate(as P) EPA 300.0 08-05-1796-2 05/21/08 N/A 94 93 63-141 1 0-12 <br /> Sulfate EPA 300.0 08-05-1796-2 05/21/08 N/A 99 100 49-133 0 0-3 <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 />