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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: 2406880 <br /> Date Prepared: 06/18/2024 BatchID: 295928 <br /> Date Analyzed: 06/20/2024 Extraction Method: DOD QSM <br /> Instrument: LC-MS3 Analytical Method: DOD QSM <br /> Matrix: Soil Unit: µg/Kg <br /> Project: E2001601F.004.002; SCK Sample ID: MB/LCS/LCSD-295928 <br /> 2406880-001AMSABD <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 5.0 5.1 5 ND 99 101 70-130 1.79 30 <br /> PFHxS 1 5.0 4.9 5 ND 100 99 67-130 0.937 30 <br /> PFMBA 1 4.9 4.8 5 ND 99 95 70-130 3.82 30 <br /> PFMPA 1 5.1 5.0 5 ND 102 100 70-130 1.33 30 <br /> PFNA 1 4.6 4.8 5 ND 92 95 72-129 3.43 30 <br /> PFNS 1 4.4 4.7 5 ND 88 95 69-125 7.45 30 <br /> PFOA 1 5.0 5.2 5 ND 100 105 69-133 4.71 30 <br /> PFODA 1 1.9 2.0 5 ND 37,F10 40,F10 70-130 6.61 30 <br /> PFOS 1 6.4 6.5 5 2.049 86 88 68-136 1.46 30 <br /> PFOSA 1 4.6 4.7 5 ND 92 95 67-137 2.56 30 <br /> PFPeA 1 4.9 5.0 5 ND 92 94 69-132 1.61 30 <br /> PFPeS 1 4.4 4.5 5 ND 88 91 73-123 2.64 30 <br /> PFTeDA 1 4.8 5.0 5 ND 96 100 69-133 4.43 30 <br /> PFTrDA 1 4.8 4.6 5 ND 97 93 66-139 4.71 30 <br /> PFUnA 1 4.7 4.8 5 ND 95 96 64-136 1.10 30 <br /> DoD-ELAP Cert#L22-757•CA ELAP 1644 <br /> Page 24 of 30 <br />