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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 Services,Inc. WorkOrder: 2411396 <br /> Date Prepared: 11/07/2024 BatchID: 305511 <br /> Date Analyzed: 11/11/2024 Extraction Method: SW5030B <br /> Instrument: GC49 Analytical Method: SW8260D <br /> Matrix: Soil Unit: mg/kg <br /> Project: 6515;Marathon Stockton Bin Sample ID: MB/LCS/LCSD-305511 <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 0.11 0.12 0.12 92 92 70-140 0.0337 30 <br /> Toluene-d8 0.14 0.14 0.12 109 108 70-140 0.580 30 <br /> 4-131`13 0.012 0.012 0.012 97 93 70-140 3.21 30 <br /> Benzene-d6 0.085 0.084 0.10 85 84 70-140 1.47 30 <br /> Ethylbenzene-d10 0.090 0.089 0.10 90 89 70-140 1.61 30 <br /> 1,2-DCB-d4 0.064 0.063 0.10 65,1`3 63,F3 70-140 2.11 30 <br /> CA ELAP 1644•NELAP 4033ORELAP <br /> Page 17 of 27 <br />