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Excelchem Laboratories,Inc. <br /> DTE Stockton,LLC Project: 2019 Annual Fly Ash Profiling <br /> 2526 W.Washington St. Project Number: 4701254256 Date Reported: <br /> Stockton,CA 95203 Project Manager: Genny Huffinan 04/12/19 16:21 <br /> Total Recoverable Metals-Quality Control <br /> Reporting Spike Source %REC RPD <br /> Analyte Result Limit Units Level Result %REC Limits RPD Limit Notes <br /> Batch A]D0097-EPA 6010B <br /> Matrix Spike(A]D0097-MS1) Source:1904027-01RE1 Prepared&Analyzed:04/10/19 <br /> Antimony 30.9 0.5 mg/kg 100 1.10 29.8 75-125 QM-01 <br /> Arsenic 90.5 1.0 100 ND 90.5 75-125 <br /> Arsenic 90.5 0.5 100 ND 90.5 75-125 <br /> Barium 169 0.5 100 81.9 86.8 75-125 <br /> Beryllium 94.6 0.5 100 ND 94.6 75-125 <br /> Cadmium 93.7 0.5 100 0.092 93.6 75-125 <br /> Chromium 114 0.5 100 27.6 86.7 75-125 <br /> Cobalt 94.2 0.5 100 7.95 86.3 75-125 <br /> Copper 154 0.5 100 49.7 105 75-125 <br /> Lead 92.7 0.5 100 7.93 84.8 75-125 <br /> Molybdenum 79.7 0.5 100 0.292 79.4 75-125 <br /> Nickel 106 0.5 100 22.2 83.5 75-125 <br /> Lead 92.7 1.0 100 7.93 84.8 75-125 <br /> Selenium 83.6 0.5 100 ND 83.6 75-125 <br /> Silver 83.7 0.5 100 ND 83.7 75-125 <br /> Thallium 81.7 0.5 100 ND 81.7 75-125 <br /> Vanadium 131 0.5 100 51.9 79.1 75-125 <br /> Zinc 130 0.5 100 42.2 87.9 75-125 <br /> Matrix Spike Dup(A]D0097-MSD1) Source:1904027-01RE1 Prepared&Analyzed:04/10/19 <br /> Antimony 27.2 0.5 mg/kg 100 1.10 26.2 75-125 12.6 25 QM-01 <br /> Arsenic 87.3 0.5 100 ND 87.3 75-125 3.61 25 <br /> Arsenic 87.3 1.0 100 ND 87.3 75-125 3.61 25 <br /> Barium 191 0.5 100 81.9 109 75-125 12.3 25 <br /> Beryllium 93.6 0.5 100 ND 93.6 75-125 0.988 25 <br /> Cadmium 90.6 0.5 100 0.092 90.5 75-125 3.38 25 <br /> Chromium 118 0.5 100 27.6 90.3 75-125 3.10 25 <br /> Cobalt 92.9 0.5 100 7.95 84.9 75-125 1.45 25 <br /> Copper 129 0.5 100 49.7 79.2 75-125 18.1 25 <br /> Lead 92.9 0.5 100 7.93 85.0 75-125 0.259 25 <br /> Molybdenum 77.5 0.5 100 0.292 77.2 75-125 2.77 25 <br /> Lead 92.9 1.0 100 7.93 85.0 75-125 0.259 25 <br /> Nickel 107 0.5 100 22.2 84.9 75-125 1.32 25 <br /> Selenium 77.5 0.5 100 ND 77.5 75-125 7.59 25 <br /> Silver 81.1 0.5 100 ND 81.1 75-125 3.09 25 <br /> Thallium 80.0 0.5 100 ND 80.0 75-125 2.08 25 <br /> Vanadium 132 0.5 100 51.9 80.6 75-125 1.14 25 <br /> Zinc 124 0.5 100 42.2 82.2 75-125 4.48 25 <br /> Excelchem Environmental Lab. 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 /> Laboratory Representative Page 10 of 17 <br />