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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: 24011303 <br /> Date Prepared: 01/23/2024 BatchID: 286391 <br /> Date Analyzed: 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-286391 <br /> 2401B03-024AMS/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 4.8 5 ND 106 96 70-130 10.0 30 <br /> PFHxS 1 6.3 6.2 5 ND 115 113 67-130 1.97 30 <br /> PFMBA 1 5.1 5.0 5 ND 102 99 70-130 3.31 30 <br /> PFMPA 1 5.1 4.8 5 ND 103 96 70-130 6.36 30 <br /> PFNA 1 6.0 5.9 5 ND 112 ill 72-129 0.447 30 <br /> PFNS 1 5.7 5.6 5 ND 114 ill 69-125 2.23 30 <br /> PFOA 1 6.3 5.6 5 ND 126 ill 69-133 12.4 30 <br /> PFODA 1 2.7 2.4 5 ND 54,F10 48,F1 70-130 11.1 30 <br /> PFOS 1 100 74 5 78 487,F10 F1 68-136 NA 30 <br /> PFOSA 1 5.8 5.5 5 ND 117 ill 67-137 5.55 30 <br /> PFPeA 1 5.6 5.4 5 ND 105 99 69-132 5.20 30 <br /> PFPeS 1 5.8 5.2 5 ND 115 105 73-123 9.38 30 <br /> PFTeDA 1 5.5 5.3 5 ND 110 106 69-133 3.49 30 <br /> PFTrDA 1 5.5 5.3 5 ND ill 105 66-139 4.87 30 <br /> PFUnA 1 5.6 5.4 5 ND 112 109 64-136 3.47 30 <br /> DoD-ELAP Cert#L22-757•CA ELAP 1644 <br /> Page 65 of 75 <br />