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WG1805503 QUALITY CONTROL SUMMARY <br />Metals (ICP) by Method 6010B L1452254-01 <br />L1452657-07 Original Sample (OS) • Matrix Spike (MS) • Matrix Spike Duplicate (MSD) <br />(OS) L1452657-07 <br />Analyte <br />01/26/22 22:48 • (MS) R3754003-5 <br />Spike Amount Original Result <br />(dry) (dry) <br />mg/kg mg/kg <br />01/26/22 22:56 • (MSD) R3754003-6 01/26/22 22:59 <br />MSD Result MS Result (dry) MS Rec. MSD Rec. (dry) <br />mg/kg mg/kg % % <br />Dilution Rec. Limits MS Qualifier MSD Qualifier RPD RPD Limits <br />% <br />Antimony 122 1.05 43.1 47.5 34.5 38.1 1 75.0-125 J6 JO 9.53 20 <br />Arsenic 122 6.35 111 113 85.8 87.5 1 75.0-125 1.86 20 <br />Barium 122 111 217 219 86.4 88.4 1 75.0-125 1.10 20 <br />Beryllium 122 0.700 113 117 92.0 95.5 1 75.0-125 3.66 20 <br />Cadmium 122 0.195 109 112 89.0 91.8 1 75.0-125 3.15 20 <br />Chromium 122 17.8 126 129 88.5 91.5 1 75.0-125 2.87 20 <br />Cobalt 122 8.32 125 130 95.6 99.5 1 75.0-125 3.75 20 <br />Copper 122 15.3 132 138 95.9 101 1 75.0-125 4.63 20 <br />Lead 122 32.4 139 146 87.6 93.5 1 75.0-125 5.10 20 <br />Molybdenum 122 0.259 105 109 86.0 89.2 1 75.0-125 3.61 20 <br />Nickel 122 13.0 129 133 95.1 98.2 1 75.0-125 2.89 20 <br />Selenium 122 u 105 108 86.0 88.3 1 75.0-125 2.63 20 <br />Silver 24.4 U 21.5 22.2 88.3 91.0 1 75.0-125 3.00 20 <br />Thallium 122 U 106 109 86.7 89.5 1 75.0-125 3.15 20 <br />Vanadium 122 31.1 140 145 89.3 93.6 1 75.0-125 3.69 20 <br />Zinc 122 46.5 150 153 84.9 87.7 1 75.0-125 2.25 20 <br />ACCOUNT: PROJECT: SDG: DATE/TIME: PAGE: <br />ATC -San Ramon, CA 204BS04278 L1452254 01/27/2211:24 12 of 23