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Page 54 of 79 <br /> alscience „y <br /> _nvironmental Quality Control - LCS/LCS Duplicate Q° <br /> rmw aboratories, Inc. Q <br /> ne f <br /> GeoSyntec Consultants Date Received: N/A <br /> 475 14th Street, Suite 450 Work Order No: 08-08-0026 <br /> Oakland, CA 94612-1940 Preparation: EPA 3510C <br /> Method: EPA 8081A <br /> Project: W FS - Stockton <br /> Date Date LCS/LCSD Batch <br /> Quality Control Sample ID Matrix Instrument Prepared Analyzed Number <br /> 099-12-529-181 Aqueous GC 44 08/01/08 08/05/08 080801L02 <br /> Parameter LCS%REC LCSD%REC %REC CL RPD RPD CL Qualifiers <br /> Alpha-BHC 83 78 50-135 6 0-25 <br /> Gamma-BHC 83 79 50-135 6 0-25 <br /> Beta-BHC 83 79 50-135 6 0-25 <br /> Heptachlor 78 76 50-135 3 0-25 <br /> Delta-BHC 85 80 50-135 6 0-25 <br /> Aldrin 73 72 50-135 2 0-25 <br /> Heptachlor Epoxide 84 79 50-135 5 0-25 <br /> Endosulfan I 82 77 50-135 6 0-25 <br /> Dieldrin 85 80 50-135 5 0-25 <br /> 4,4'-DDE 85 81 50-135 5 0-25 <br /> Endrin 86 83 50-135 4 0-25 <br /> Endrin Aldehyde 88 95 50-135 7 0-25 <br /> 4,4'-DDD 83 79 50-135 4 0-25 <br /> Endosulfan II 81 76 50-135 6 0-25 <br /> 4,4'-DDT 85 81 50-135 6 0-25 <br /> Endosulfan Sulfate 78 75 50-135 4 0-25 <br /> Methoxychlor 92 89 50-135 4 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 />