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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:ACTEnviro <br />Project:1-GLAROS-UST; Glaros <br />Date Analyzed:03/12/2024 - 03/13/2024 <br />Date Prepared:03/11/2024 <br />WorkOrder:2403651 <br />BatchID:289283 <br />Analytical Method:E200.8 <br />Unit:µg/L <br />Sample ID:MB/LCS/LCSD-289283 <br />Instrument:ICP-MS5, ICP-MS6 <br />Matrix:Water <br />Extraction Method:E200.8 <br />QC Report for Metals (>1% Sediment Content) <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 260 260 250 106 105 85-115 0.677 20 <br />Arsenic 270 270 250 108 107 85-115 1.25 20 <br />Barium 2800 2800 2500 110 111 85-115 0.450 20 <br />Beryllium 270 260 250 106 105 85-115 0.969 20 <br />Cadmium 270 270 250 107 109 85-115 1.95 20 <br />Chromium 270 270 250 108 108 85-115 0.102 20 <br />Cobalt 270 270 250 109 108 85-115 1.03 20 <br />Copper 280 270 250 111 109 85-115 1.39 20 <br />Lead 260 270 250 105 108 85-115 2.69 20 <br />Mercury 6.5 6.4 6.25 104 103 85-115 1.00 20 <br />Molybdenum 260 260 250 105 105 85-115 0.395 20 <br />Nickel 270 270 250 109 108 85-115 0.835 20 <br />Selenium 280 270 250 113 109 85-115 3.98 20 <br />Silver 270 280 250 108 111 85-115 1.90 20 <br />Thallium 270 270 250 108 106 85-115 1.66 20 <br />Vanadium 270 270 250 107 107 85-115 0.319 20 <br />Zinc 2700 2700 2500 110 109 85-115 1.24 20 <br />Surrogate Recovery <br />Terbium 2800 2800 2500 113 112 70-130 0.454 20 <br />CA ELAP 1644 • NELAP 4033ORELAP <br />Page 8 of 14