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1534 Willow Pass Road,Pittsburg,CA 94565-1701 <br /> _ M c C a m p b e I l Analytical, Inc. Toll Free Telephone:(877)252-9262/Fax:(925)252-9269 <br /> "When Quality Counts" http://www.mccampbeR.com/E-mail:main@mccampbell.com <br /> Quality Control Report <br /> Client: AdvancedGeo,Inc. WorkOrder: 2309886 <br /> Date Prepared: 09/14/2023 BatchID: 278038 <br /> Date Analyzed: 09/22/2023 -09/23/2023 Extraction Method: SW5030B <br /> Instrument: GC16,GC49 Analytical Method: SW8260B <br /> Matrix: Soil Unit: mg/kg <br /> Project: San Joaquin County Corp Yard Sample ID: MB/LCS/LCSD-278038 <br /> QC Summary Report for SW8260B <br /> Analyte LCS LCSD SPK LCS LCSD LCS/LCSD RPD RPD <br /> Result Result Val %REC %REC Limits Limit <br /> Surrogate Recovery <br /> Dibromofluoromethane 0.13 0.13 0.12 108 108 70-140 0.0353 30 <br /> Toluene-d8 0.15 0.15 0.12 118 118 70-140 0.619 30 <br /> 4-BFB 0.014 0.014 0.012 113 111 70-140 1.91 30 <br /> Benzene-d6 0.12 0.12 0.10 116 116 70-140 0.0049 30 <br /> Ethyl benzene-d10 0.12 0.12 0.10 122 121 70-140 0.675 30 <br /> 1,2-DCB-d4 0.084 0.084 0.10 84 84 70-140 0.0082 30 <br /> CA ELAP 1644•NELAP 4033ORELAP <br /> Page 21 of 28 <br />