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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.mccampbell.com/E-mail:main@mccampbell.com <br /> Quality Control Report <br /> Client: BSK Associates Engineers&Laboratories WorkOrder: 2406882 <br /> Date Prepared: 06/18/2024 BatchID: 295928 <br /> Date Analyzed: 06/20/2024 Extraction Method: DOD QSM <br /> Instrument: LC-MS3 Analytical Method: DOD QSM <br /> Matrix: Soil Unit: µg/Kg <br /> Project: E2001601F.004.002; SCK Sample ID: MB/LCS/LCSD-295928 <br /> QC Summary Report for DOD QSM 5.3 <br /> Analyte LCS LCSD SPK LCS LCSD LCS/LCSD RPD RPD <br /> Result Result Val %REC %REC Limits Limit <br /> PFPeS 4.7 4.9 5 94 99 73-123 4.57 30 <br /> PFTeDA 4.8 4.9 5 95 99 69-133 3.50 30 <br /> PFTrDA 4.9 4.8 5 98 97 66-139 0.938 30 <br /> PFUnA 4.9 5.5 5 99 110 64-136 10.6 30 <br /> DoD-ELAP Cert#L22-757•CA ELAP 1644 <br /> Page 21 of 27 <br />