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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: 2401944 <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 PFAS Sample ID: MB/LCS/LCSD-286390 <br /> 2401944-027AMS/MSD <br /> QC Summary Report for DOD QSM 5.3 <br /> Analyte MS MS MSD SPK SPKRef MS MSD MS/MSD RPD RPD <br /> DF Result Result Val Val %REC %REC Limits Limit <br /> PFHxDA 1 5.3 5.4 5 ND 105 108 70-130 2.78 30 <br /> PFHxS 1 6.8 7.6 5 ND 136,F10 153,F10 67-130 11.8 30 <br /> PFMBA 1 4.8 5.5 5 ND 96 109 70-130 12.4 30 <br /> PFMPA 1 5.2 5.5 5 ND 104 110 70-130 5.86 30 <br /> PFNA 1 6.9 7.2 5 ND 138,F10 144,F10 72-129 4.51 30 <br /> PFNS 1 7.0 7.5 5 ND 141,F10 149,F10 69-125 5.57 30 <br /> PFOA 1 6.8 6.9 5 ND 136,F10 138,F10 69-133 1.40 30 <br /> PFODA 1 2.6 2.7 5 ND 53,F10 54,F10 70-130 2.27 30 <br /> PFOS 1 6.6 7.1 5 ND 131 141,F10 68-136 7.37 30 <br /> PFOSA 1 7.5 7.6 5 ND 150,F10 151,F10 67-137 0.656 30 <br /> PFPeA 1 6.5 7.2 5 ND 130 145,F10 69-132 10.9 30 <br /> PFPeS 1 7.2 7.2 5 ND 143,F10 145,F10 73-123 0.974 30 <br /> PFTeDA 1 6.8 6.9 5 ND 135,F10 137,F10 69-133 1.69 30 <br /> PFTrDA 1 7.1 7.6 5 ND 143,F10 152,F10 66-139 6.14 30 <br /> PFUnA 1 6.6 7.2 5 ND 132 145,F10 64-136 9.28 30 <br /> DoD-ELAP Cert#L22-757•CA ELAP 1644 <br /> Page 69 of 80 <br />