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Excelchem Environmental Labs <br /> DTE Stockton,LLC Project: Ash <br /> 2526 W.Washington St. Project Number: #4701180998 Date Reported: <br /> Stockton,CA 95203 Project Manager: Dan Crawford 06/07/18 17:24 <br /> STLC Metals-Quality Control <br /> Reporting Spike Source %REC RPD <br /> Analyte Result Limit Units Level Result %REC Limits RPD Limit Notes <br /> Batch AT0052-EPA 6010B <br /> Matrix Spike(A\F0052-MS1) Source:1806019-01 Prepared&Analyzed:06/07/18 <br /> Antimony 21.5 2.0 mg/L 20.0 0.027 108 75-125 <br /> Arsenic 23.1 0.2 20.0 0.324 114 75-125 <br /> Barium 34.1 0.4 20.0 6.80 137 75-125 QM-01 <br /> Beryllium 19.0 0.1 20.0 0.005 95.1 75-125 <br /> Cadmium 21.0 0.2 20.0 0.015 105 75-125 <br /> Chromium 21.0 0.2 20.0 0.540 102 75-125 <br /> Cobalt 18.7 1.0 20.0 0.119 93.1 75-125 <br /> Copper 27.7 0.4 20.0 4.32 117 75-125 <br /> Lead 18.0 0.2 20.0 0.284 88.8 75-125 <br /> Molybdenum 20.7 0.2 20.0 0.084 103 75-125 <br /> Nickel 19.3 0.2 20.0 0.577 93.6 75-125 <br /> Selenium 22.5 0.4 20.0 0.028 112 75-125 <br /> Silver 20.0 0.4 20.0 0.008 99.8 75-125 <br /> Thallium 17.1 0.4 20.0 ND 85.5 75-125 <br /> Vanadium 19.8 0.4 20.0 0.635 95.7 75-125 <br /> Zinc 23.4 0.4 20.0 2.52 104 75-125 <br /> Matrix Spike Dup(A\F0052-MSD1) Source:1806019-01 Prepared&Analyzed:06/07/18 <br /> Antimony 21.6 2.0 mg/L 20.0 0.027 108 75-125 0.186 25 <br /> Arsenic 23.2 0.2 20.0 0.324 114 75-125 0.346 25 <br /> Barium 34.0 0.4 20.0 6.80 136 75-125 0.205 25 QM-01 <br /> Beryllium 19.0 0.1 20.0 0.005 95.0 75-125 0.0526 25 <br /> Cadmium 21.0 0.2 20.0 0.015 105 75-125 0.238 25 <br /> Chromium 21.0 0.2 20.0 0.540 103 75-125 0.143 25 <br /> Cobalt 18.7 1.0 20.0 0.119 93.1 75-125 0.00 25 <br /> Copper 27.5 0.4 20.0 4.32 116 75-125 0.725 25 <br /> Lead 18.2 0.2 20.0 0.284 89.4 75-125 0.663 25 <br /> Molybdenum 20.6 0.2 20.0 0.084 103 75-125 0.291 25 <br /> Nickel 19.4 0.2 20.0 0.577 94.1 75-125 0.517 25 <br /> Selenium 22.6 0.4 20.0 0.028 113 75-125 0.443 25 <br /> Silver 19.7 0.4 20.0 0.008 98.5 75-125 1.31 25 <br /> Thallium 17.2 0.4 20.0 ND 86.0 75-125 0.641 25 <br /> Vanadium 19.7 0.4 20.0 0.635 95.3 75-125 0.405 25 <br /> Zinc 23.5 0.4 20.0 2.52 105 75-125 0.384 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 13 <br />