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McCampbell Analytical, Inc. <br />"When Quality Counts" <br />1534 Willow Pass Road, Pittsburg, CA 94565-1701 <br />Toll Free Telephone: (877) 252-9262 / Fax: (925) 252-9269 <br />http://www.mccampbell.com / E-mail: main@meeampbell.com <br /> <br />Quality Control Report <br />Client: US Ecology <br />Date Prepared: 07/14/2022 <br />Date Analyzed: 07/15/2022 <br />Instrument: ICP-MS5 <br />Matrix: Soil <br />Project: 180641; Alpine Helicopter <br />WorkOrder: 2207760 <br />BatchID: 249575 <br />Extraction Method: SW3050B <br />Analytical Method: SW6020 <br />Unit: mg/kg <br />Sample ID: MB/LCS/LCSD-249575 <br />QC Summary Report for Metals <br />Analyte LCS <br />Result <br />LCSD <br />Result <br />SPK <br />Val <br />LCS <br />%REC <br />LCSD <br />%REC <br />LCS/LCSD <br />Limits <br />RPD RPD <br />Limit <br />Antimony 54 53 50 108 107 75-125 0.724 20 <br />Arsenic 53 52 50 105 104 75-125 0.590 20 <br />Barium 510 510 500 103 103 75-125 0.144 20 <br />Beryllium 52 51 50 103 103 75-125 0.370 20 <br />Cadmium 52 51 50 104 103 75-125 1.22 20 <br />Chromium 53 53 50 106 106 75-125 0.0302 20 <br />Cobalt 53 53 50 107 105 75-125 1.33 20 <br />Copper 53 52 50 105 105 75-125 0.836 20 <br />Lead 52 52 50 104 103 75-125 1.10 20 <br />Mercury 1.3 1.3 1.25 104 104 75-125 0.770 20 <br />Molybdenum 53 52 50 106 105 75-125 1.23 20 <br />Nickel 52 52 50 103 104 75-125 0.683 20 <br />Selenium 52 52 50 103 103 75-125 0.155 20 <br />Silver 52 51 50 104 102 75-125 1.89 20 <br />Thallium 52 52 50 105 104 75-125 0.343 20 <br />Vanadium 52 52 50 104 104 75-125 0.557 20 <br />Zinc 520 520 500 105 104 75-125 0.758 20 <br />Surrogate Recovery <br />Terbium 540 540 500 108 108 70-130 0.304 20 <br />CA ELAP 1644 • NELAP 40330RELAP <br />Page 22 of 29