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Excelehem Laboratories, Inc. <br />Ancon Environmental <br />570 Business Park Dr. <br />Lincoln, CA 95678 <br />Project LMH Lathrop <br />Project Number: 1050228 <br />Project Manager Nolan Ryan <br />Ditte Reported <br />0-1[20 '21 17 <br />Total Recoverable Nl etals - Quality Control <br />%nal <br />Reporting Spike <br />Limit Units <br />Source %AEC <br />Level Result "'AEC Limits RPD <br />RFD <br />Limit Notes <br />1)1)114- EPA 601011 Batch A <br />Matrix Spike (A_D0114-MS1) Source: 2104025-01 Prepared: 04/12/21 Analyzed: 04/13/21 <br />QM-01 <br />Antimony 29.6 0.5 InSik8 100 0.368 29.2 75-125 <br />Arsenic 133 0.5 " 100 22.7 110 75-125 <br />Barium 161 0.5 " 100 62.9 98.6 75-125 <br />Beryllium 90.1 0.5 100 0.368 89.7 75-125 <br />Cadmium 89.3 0.5 100 0.232 89.0 75-125 <br />Chromium 99.0 0.5 100 6.49 92.5 75-125 <br />Cobalt 94.7 0.5 100 2.85 91.9 75-125 <br />Copper 109 0.5 100 11.4 97.5 75-125 <br />Lead 94.8 0.5 100 4.41 90.3 75-125 <br />Molybdenum 81.3 0.5 100 0.904 80.4 75-125 <br />Nickel 96.8 0.5 100 6.65 90.1 75-125 <br />Selenium 86.3 0.5 100 0.813 85.5 75-125 <br />Silver 90.1 0.5 100 ND 90.1 75-125 <br />Thallium 88.7 0.5 100 ND 88.7 75-125 <br />Vanadium 129 0.5 100 20.2 109 75-125 <br />Zinc 246 0.5 100 137 109 75-125 <br />Matrix Spike Dup (A_D0114-MSD1) Source: 2104025-01 Prepared: 04/12/21 Analyzed: 04/13/21 <br />28.2 75-125 3.42 25 QM-01 <br />Antimony 28.6 0.5 Ingh8 100 0.368 <br />10.6 25 <br />Arsenic 119 0.5 . 100 22.7 96.5 75-125 <br />15.2 25 <br />Barium 139 0.5 100 62.9 75.8 75-125 <br />75-125 6.39 25 <br />Beryllium 96.0 0.5 . 100 0.368 95.7 <br />75-125 6.96 25 <br />Cadmium 95.7 0.5 100 0.232 95.5 <br />75-125 5.35 25 <br />Chromium 104 0.5 • 100 6.49 98.0 <br />75-125 6.79 25 <br />Cobalt 101 0.5 100 2.85 98.5 <br />1.83 25 <br />Copper I 1 1 0.5 100 11.4 99.5 75-125 <br />75-125 4.36 25 <br />Lead 99.0 0.5 ., 100 4.41 94.6 <br />7.00 25 <br />Molybdenum 87.2 0.5 100 0.904 86.3 75-125 <br />5.86 25 <br />Nickel 103 0.5 100 6.65 96.0 75-125 <br />9.08 25 <br />Selenium 94.5 0.5 100 0.813 93.7 75-125 <br />5.84 2.5 <br />Silver 95.5 0.5 100 ND 95.5 75-125 <br />7.69 25 <br />Thallium 95.8 0.5 100 ND 95.8 75-125 <br />0.119 25 <br />Vanadium 129 0.5 100 20.2 109 75-125 <br />9.60 25 <br />Zinc 224 0.5 100 137 86.4 75-125 <br />Excelchem Laboratories. Inc. The results in this report apply to the samples analyzed in accordance with the chain of <br />custody document. This analytical report must be reproduced in its entirety. <br /> <br />Page 10 of 12 <br />Laboratory Representative <br />