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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 16:27 <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 AW0029-EPA 6010B <br /> Matrix Spike Dup(A\F0029-MSD1) Source:1806007-01 Prepared&Analyzed:06/05/18 <br /> Antimony 42.2 1.0 mg/kg 100 0.736 41.4 75-125 0.166 25 QM-01 <br /> Arsenic 104 1.0 100 4.01 100 75-125 0.965 25 <br /> Arsenic 104 1.0 100 4.01 100 75-125 0.965 25 <br /> Barium 801 2.0 100 199 602 75-125 78.5 25 QM-11 <br /> Beryllium 91.1 0.5 100 0.146 91.0 75-125 0.896 25 <br /> Cadmium 98.3 1.0 100 0.140 98.2 75-125 0.551 25 <br /> Chromium 126 1.0 100 22.1 104 75-125 2.20 25 <br /> Cobalt 94.2 5.0 100 6.64 87.6 75-125 0.0743 25 <br /> Copper 243 2.0 100 83.5 159 75-125 13.9 25 QM-01 <br /> Lead 99.6 1.0 100 13.9 85.7 75-125 2.10 25 <br /> Molybdenum 94.1 1.0 100 0.626 93.5 75-125 0.0106 25 <br /> Nickel 118 1.0 100 24.8 93.7 75-125 2.50 25 <br /> Lead 99.6 1.0 100 13.9 85.7 75-125 2.10 25 <br /> Selenium 93.2 2.0 100 ND 93.2 75-125 0.129 25 <br /> Silver 91.2 1.0 100 ND 91.2 75-125 0.483 25 <br /> Thallium 79.6 2.0 100 ND 79.6 75-125 2.14 25 <br /> Vanadium 118 2.0 100 31.4 86.3 75-125 2.32 25 <br /> Zinc 123 2.0 100 30.5 92.1 75-125 0.163 25 <br /> Batch A\F0036-EPA 7471A <br /> Blank(A\F0036-BLK1) Prepared&Analyzed:06/06/18 <br /> Mercury ND 0.016 mg/kg <br /> LCS(A\F0036-BS1) Prepared&Analyzed:06/06/18 <br /> Mercury 0.170 0.016 mg/kg 0.200 84.8 80-120 <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 7 of 14 <br />