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1534 Willow Pass Road,Pittsburg,CA 94565-1701 <br /> _ M c C a m p b e I I Analytical, Inc. Toll Free Telephone:(877)252-9262/Fax:(925)252-9269 <br /> I "When Quality Counts" http://www.mccampbell.com/E-mail:main@mccampbell.com <br /> Quality Control Report <br /> Client: Patriot Environmental Service WorkOrder: 2409559 <br /> Date Prepared: 09/11/2024 BatchID: 301631 <br /> Date Analyzed: 09/11/2024-09/12/2024 Extraction Method: SW5030B <br /> Instrument: GC38,GC49 Analytical Method: SW8260D <br /> Matrix: Soil Unit: mg/kg <br /> Project: 5113;MARATHON STOCKTON-OILY DEBRIS Sample ID: MB/LCS/LCSD-301631 <br /> QC Summary Report for SW8260D <br /> Analyte LCS LCSD SPK LCS LCSD LCS/LCSD RPD RPD <br /> Result Result Val %REC %REC Limits Limit <br /> Surrogate Recovery <br /> Dibromofluoromethane 0.12 0.12 0.12 93 94 70-140 1.16 30 <br /> Toluene-d8 0.13 0.13 0.12 107 107 70-140 0.290 30 <br /> 4-BFB 0.014 0.014 0.012 108 109 70-140 0.678 30 <br /> Benzene-d6 0.11 0.11 0.10 107 110 70-140 2.72 30 <br /> Ethyl benzene-d10 0.13 0.13 0.10 126 129 70-140 3.01 30 <br /> 1,2-DCB-d4 0.080 0.082 0.10 80 82 70-140 3.13 30 <br /> CA ELAP 1644•NELAP 4033ORELAP <br /> Page 22 of 38 <br />