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1534 Willow Pass Road,Pittsburg,CA 94565-1701 <br /> _ M c C a m p b e I I Analytical, Inc. Toll Free Telephone:(877)252-9262/Fax:(925)252-9269 <br /> I "When Quality Counts" http://www.mccampbell.com/E-mail:main@mccampbell.com <br /> Quality Control Report <br /> Client: Patriot Environmental Service WorkOrder: 2409559 <br /> Date Prepared: 09/11/2024 BatchID: 301671 <br /> Date Analyzed: 09/12/2024 Extraction Method: SW3050B <br /> Instrument: ICP-MS5 Analytical Method: SW6020 <br /> Matrix: Soil Unit: mg/kg <br /> Project: 5113;MARATHON STOCKTON-OILY DEBRIS Sample ID: MB/LCS/LCSD-301671 <br /> QC Summary Report for Metals <br /> Analyte LCS LCSD SPK LCS LCSD LCS/LCSD RPD RPD <br /> Result Result Val %REC %REC Limits Limit <br /> Antimony 55 53 50 111 107 75-125 4.06 20 <br /> Arsenic 56 54 50 113 107 75-125 5.29 20 <br /> Barium 550 530 500 110 106 75-125 3.58 20 <br /> Beryllium 56 54 50 112 107 75-125 4.45 20 <br /> Cadmium 55 53 50 109 105 75-125 3.98 20 <br /> Chromium 56 52 50 112 104 75-125 6.92 20 <br /> Cobalt 56 54 50 112 107 75-125 4.02 20 <br /> Copper 56 54 50 112 109 75-125 3.00 20 <br /> Lead 54 53 50 108 105 75-125 2.84 20 <br /> Mercury 1.4 1.3 1.25 112 107 75-125 4.31 20 <br /> Molybdenum 55 53 50 110 106 75-125 3.71 20 <br /> Nickel 56 54 50 113 108 75-125 3.78 20 <br /> Selenium 56 53 50 112 107 75-125 5.14 20 <br /> Silver 55 52 50 109 104 75-125 4.87 20 <br /> Thallium 55 53 50 110 106 75-125 3.20 20 <br /> Vanadium 56 52 50 112 105 75-125 6.79 20 <br /> Zinc 560 530 500 112 107 75-125 4.47 20 <br /> Surrogate Recovery <br /> Terbium 560 540 500 111 109 70-130 2.24 20 <br /> CA ELAP 1644•NELAP 4033ORELAP <br /> Page 30 of 38 <br />