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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: 2312D30 <br /> Date Prepared: 12/27/2023 BatchID: 284839 <br /> Date Analyzed: 01/03/2024 Extraction Method: DOD QSM <br /> Instrument: LC-MS3 Analytical Method: DOD QSM <br /> Matrix: Soil Unit: µg/Kg <br /> Project: E200160117; Stockoton Airport PFAS Sample ID: MB/LCS/LCSD-284839 <br /> 2312D30-004AMS/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 5.7 5.4 5 ND 113 109 70-130 4.40 30 <br /> PFHxS 1 15 16 5 10.14 104 119 67-130 4.74 30 <br /> PFMBA 1 5.6 5.6 5 ND 112 113 70-130 0.944 30 <br /> PFMPA 1 5.4 5.2 5 ND 107 105 70-130 2.66 30 <br /> PFNA 1 5.9 5.5 5 ND 118 109 72-129 7.31 30 <br /> PFNS 1 5.5 5.1 5 ND 109 102 69-125 6.98 30 <br /> PFOA 1 5.5 5.7 5 ND 110 113 69-133 2.82 30 <br /> PFODA 1 3.7 3.5 5 ND 73 70 70-130 3.80 30 <br /> PFOS 1 9.4 9.4 5 4.409 100 99 68-136 0.267 30 <br /> PFOSA 1 5.7 5.7 5 ND 113 113 67-137 0.00529 30 <br /> PFPeA 1 6.4 6.4 5 ND 113 113 69-132 0.221 30 <br /> PFPeS 1 6.3 5.9 5 ND 109 103 73-123 5.51 30 <br /> PFTeDA 1 5.4 6.0 5 ND 109 120 69-133 9.80 30 <br /> PFTrDA 1 6.2 6.2 5 ND 123 124 66-139 0.536 30 <br /> PFUnA 1 5.2 5.3 5 ND 104 106 64-136 2.32 30 <br /> DoD-ELAP Cert#L22-757•CA ELAP 1644 <br /> Page 18 of 23 <br />