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Quality Control Report <br />McCampbell Analytical, Inc.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@mccampbell.com"When Quality Counts" <br />Client:AdvancedGeo, Inc. <br />Project:Pilkington <br />Date Analyzed:02/03/2021 <br />Date Prepared:02/02/2021 <br />WorkOrder:2102062 <br />BatchID:214291 <br />Analytical Method:SW6020 <br />Unit:mg/kg <br />Sample ID:MB/LCS/LCSD-214291 <br />Instrument:ICP-MS5 <br />Matrix:Soil <br />Extraction Method:SW3050B <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 47.8 48.1 50 96 96 75-125 0.780 20 <br />Arsenic 50.4 50.7 50 101 101 75-125 0.441 20 <br />Barium 492 487 500 98 97 75-125 1.04 20 <br />Beryllium 48.0 48.4 50 96 97 75-125 0.792 20 <br />Cadmium 48.4 48.7 50 97 97 75-125 0.455 20 <br />Chromium 49.0 48.1 50 98 96 75-125 1.81 20 <br />Cobalt 49.3 49.3 50 99 99 75-125 0.126 20 <br />Copper 49.5 49.2 50 99 98 75-125 0.736 20 <br />Lead 48.6 48.7 50 97 97 75-125 0.234 20 <br />Mercury 1.17 1.18 1.25 94 94 75-125 0.595 20 <br />Molybdenum 46.7 47.0 50 93 94 75-125 0.529 20 <br />Nickel 49.2 49.9 50 98 100 75-125 1.38 20 <br />Selenium 49.2 50.3 50 98 101 75-125 2.17 20 <br />Silver 48.5 48.5 50 97 97 75-125 0.0268 20 <br />Thallium 48.6 48.7 50 97 97 75-125 0.284 20 <br />Vanadium 48.7 48.2 50 97 96 75-125 0.935 20 <br />Zinc 501 500 500 100 100 75-125 0.215 20 <br />Surrogate Recovery <br />Terbium 503 495 500 101 99 70-130 1.62 20 <br />CA ELAP 1644 • NELAP 4033ORELAP <br />(Cont.) <br />Page 133 of 154