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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:214295 <br />Analytical Method:SW6020 <br />Unit:mg/kg <br />Sample ID:MB/LCS/LCSD-214295 <br />2102062-002AMS/MSD <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 48.9 49.7 50 98 99 75-125 1.63 20 <br />Arsenic 50.0 51.3 50 100 103 75-125 2.51 20 <br />Barium 496 503 500 99 101 75-125 1.37 20 <br />Beryllium 49.5 49.5 50 99 99 75-125 0.0101 20 <br />Cadmium 49.6 50.0 50 99 100 75-125 0.649 20 <br />Chromium 48.5 50.6 50 97 101 75-125 4.12 20 <br />Cobalt 50.2 50.3 50 100 101 75-125 0.348 20 <br />Copper 49.3 49.4 50 99 99 75-125 0.132 20 <br />Lead 49.3 50.2 50 99 100 75-125 1.82 20 <br />Mercury 1.18 1.25 1.25 94 100 75-125 5.84 20 <br />Molybdenum 47.2 48.3 50 94 97 75-125 2.34 20 <br />Nickel 49.3 50.4 50 99 101 75-125 2.23 20 <br />Selenium 49.2 50.9 50 98 102 75-125 3.45 20 <br />Silver 48.8 49.5 50 98 99 75-125 1.50 20 <br />Thallium 49.0 50.3 50 98 101 75-125 2.65 20 <br />Vanadium 48.5 50.3 50 97 101 75-125 3.51 20 <br />Zinc 497 506 500 99 101 75-125 1.74 20 <br />Surrogate Recovery <br />Terbium 506 514 500 101 103 70-130 1.54 20 <br />Analyte MS <br />Result <br />MSD <br />Result <br />SPK <br />Val <br />SPKRef <br />Val <br />MS <br />%REC <br />MSD <br />%REC <br />MS/MSD <br /> Limits <br />RPD RPD <br />Limit <br />MS <br />DF <br />Antimony 49.1 50.5 50 ND 98 101 75-125 2.72 201 <br />Arsenic 54.2 54.7 50 2.034 104 105 75-125 1.02 201 <br />Barium 555 567 500 60.28 99 101 75-125 2.03 201 <br />Beryllium 50.6 49.6 50 ND 101 99 75-125 1.97 201 <br />Cadmium 50.1 50.4 50 ND 100 100 75-125 0.550 201 <br />Chromium 59.8 59.6 50 10.69 98 98 75-125 0.300 201 <br />Cobalt 54.7 54.4 50 4.833 100 99 75-125 0.697 201 <br />Copper 58.3 57.9 50 7.379 102 101 75-125 0.756 201 <br />Lead 53.8 53.2 50 2.580 102 101 75-125 1.13 201 <br />Mercury 1.25 1.26 1.25 ND 100 101 75-125 0.637 201 <br />Molybdenum 48.2 49.3 50 ND 96 98 75-125 2.26 201 <br />Nickel 60.4 60.8 50 8.829 103 104 75-125 0.711 201 <br />Selenium 51.6 51.8 50 ND 103 103 75-125 0.296 201 <br />Silver 49.5 50.2 50 ND 99 100 75-125 1.40 201 <br />CA ELAP 1644 • NELAP 4033ORELAP <br />(Cont.) <br />Page 135 of 154