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CALIFORNIA LABORATORY SERVICES Committed. Responsive. Flexible. Page 5 of 7 11/27/1916:13 NES Project: Cozad 1141 Sibley St Project Number: [none] CLS Work Order#:19K1235 Folsom,CA 95630 Project Manager: Natasha McClurg COC#: CAM 17 Metals-Quality Control Reporting Spike Source %REC RPD Analyte Result Limit Units Level Result %REC Limits RPD Limit Notes Batch 1909939-EPA 3050B LCS(1909939-BSI) Prepared&Analyzed: 11/26/19 Thallium 8.98 0.20 mg/kg 10.0 90 75-125 Lead 8.77 0.50 10.0 88 75-125 Matrix Spike(1909939-MS1) Source:19K1184-01 Prepared&Analyzed: 11/26/19 Beryllium 9.23 1.0 mg/kg 10.0 0.639 86 75-125 Cobalt 48.9 2.0 10.0 36.6 123 75-125 Vanadium 236 2.0 10.0 209 272 75-125 QM-5 Chromium 214 2.0 10.0 183 314 75-125 QM-5 Nickel 116 2.0 10.0 99.6 162 75-125 QM-5 Copper 76.7 2.0 10.0 63.0 138 75-125 QM-5 Zinc 99.2 5.0 10.0 87.6 116 75-125 Arsenic 13.5 2.0 10.0 4.45 91 75-125 Selenium 8.65 5.0 10.0 0.576 81 75-125 Silver 11.7 2.0 10.0 2.07 96 75-125 Molybdenum 5.34 2.0 10.0 0.504 48 75-125 QM-5 Cadmium 9.36 1.0 10.0 ND 94 75-125 Barium 158 2.0 10.0 136 224 75-125 QM-5 Antimony ND 5.0 10.0 ND 75-125 QM-5 Thallium 9.82 2.0 10.0 0.232 96 75-125 Lead 21.4 5.0 10.0 10.3 111 75-125 Matrix Spike Dup(1909939-MSD1) Source:19K1184-01 Prepared&Analyzed:11/26/19 Beryllium 9.24 1.0 mg/kg 10.0 0.639 86 75-125 0.02 30 Cobalt 52.8 2.0 10.0 36.6 161 75-125 8 30 QM-5,QM-7 Vanadium 241 2.0 10.0 209 322 75-125 2 30 QM-5 Chromium 226 2.0 10.0 183 429 75-125 5 30 QM-5 Nickel 115 2.0 10.0 99.6 153 75-125 0.8 30 QM-5 Copper 78.4 2.0 10.0 63.0 154 75-125 2 30 QM-5 Zinc 92.2 5.0 10.0 87.6 46 75-125 7 30 QM-5 Arsenic 14.0 2.0 10.0 4.45 96 75-125 4 30 Selenium 8.94 5.0 10.0 0.576 84 75-125 3 30 Silver 11.7 2.0 10.0 2.07 96 75-125 0.3 30 3249 Fitzgerald Road,Rancho Cordova,CA 95742 1 800.638.7301 1 Tel:916.638.7301 x102 1 Fax:916.638.4510 1 www.californialob.com Small Business#2916 1 ELAP#1233 1 NAICS#541380 1 CA SWRCB ELAP Accreditation/Registration Number 1233