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M1534 Willow Pass Road,Pittsburg,CA 94565-1701 <br /> c C a m p b e I l Analytical, Inc. Toll Free Telephone:(877)252-9262/Fax:(925)252-9269 <br /> t 'When Quality Counts" http://www.mccampbell.com/E-mail:main@mccampbell.com <br /> Quality Control Report <br /> Client: AdvancedGeo,Inc. WorkOrder: 2503L69 <br /> Date Prepared: 03/31/2025 BatchID: 314329 <br /> Date Analyzed: 03/31/2025 Extraction Method: SW3550B <br /> Instrument: GC46 Analytical Method: SW8270E <br /> Matrix: Soil Unit: m9/K9 <br /> Project: SUSD-Weber Institute Sample ID: MB/LCS/LCSD-314329 <br /> QC Summary Report for Organic Lead by GGMS <br /> Analyte MB MDL RL SPK MB IS/SS MB IS/SS <br /> Result Val %REC Limits <br /> Tetraethyl Lead ND 0.0018 0.0020 - <br /> Tetramethyl Lead ND 0.0015 0.0020 - - - <br /> Surrogate Recovery <br /> 2-Fluorobiphenyl 0.20 0.2 99 30-150 <br /> Analyte LCS LCSD SPK LCS LCSD LCS/LCSD RPD RPD <br /> Result Result Val %REC %REC Limits Limit <br /> Tetraethyl Lead 0.095 0.093 0.10 95 93 50-150 2.33 30 <br /> Tetramethyl Lead 0.094 0.10 0.10 94 100 50-150 6.28 30 <br /> Surrogate Recovery <br /> 2-Fluorobiphenyl 0.20 0.20 0.20 98 98 50-150 0.203 30 <br />