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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: 2401B03 <br /> Date Prepared: 01/23/2024 BatchID: 286390 <br /> Date Analyzed: 01/29/2024-01/30/2024 Extraction Method: DOD QSM <br /> Instrument: LC-MS3 Analytical Method: DOD QSM <br /> Matrix: Soil Unit: µg/Kg <br /> Project: E200160117; Stockton Airport HAS Sample ID: MB/LCS/LCSD-286390 <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 5.0 5 95 100 73-123 5.14 30 <br /> PFTeDA 4.7 5.1 5 94 102 69-133 7.92 30 <br /> PFTrDA 4.5 4.8 5 89 95 66-139 6.46 30 <br /> PFUnA 4.4 4.8 5 88 96 64-136 9.02 30 <br /> (Cont.) <br /> DoD-ELAP Cert#L22-757•CA ELAP 1644 <br /> Page 60 of 75 <br />