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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: 286389 <br /> Date Analyzed: 01/25/2024-01/26/2024 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-286389 <br /> 2401944-020AMS/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 5.4 5.4 5 ND 109 109 70-130 0.156 30 <br /> PFHxS 1 8.0 8.0 5 ND 144,F10 144,F10 67-130 0.213 30 <br /> PFMBA 1 5.8 5.4 5 ND 117 107 70-130 8.63 30 <br /> PFMPA 1 5.8 5.6 5 ND 115 113 70-130 2.03 30 <br /> PFNA 1 6.7 7.4 5 ND 134,F10 148,F10 72-129 10.4 30 <br /> PFNS 1 7.3 8.0 5 ND 145,F10 160,F10 69-125 9.82 30 <br /> PFOA 1 7.9 7.6 5 ND 158,F10 153,F10 69-133 3.28 30 <br /> PFODA 1 1.8 1.3 5 ND 36,F10 25,F10 70-130 34.3,F1 30 <br /> PFOS 1 20 23 5 8.831 228,F10 282,F10 68-136 12.6 30 <br /> PFOSA 1 7.6 6.8 5 ND 151,F10 136 67-137 10.5 30 <br /> PFPeA 1 7.7 7.2 5 ND 154,F10 145,F10 69-132 6.06 30 <br /> PFPeS 1 6.8 7.2 5 ND 137,F10 144,F10 73-123 5.12 30 <br /> PFTeDA 1 7.7 8.1 5 ND 154,F10 162,F10 69-133 5.29 30 <br /> PFTrDA 1 6.9 7.1 5 ND 138 141,F10 66-139 2.15 30 <br /> PFUnA 1 7.6 7.7 5 ND 152,F10 154,F10 64-136 0.933 30 <br /> (Cont.) <br /> DoD-ELAP Cert#L22-757•CA ELAP 1644 <br /> Page 64 of 80 <br />