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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 16:16 <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]D0063-EPA 6010B <br /> Matrix Spike Dup(A]D0063-MSD1) Source:1904036-03 Prepared:04/08/19 Analyzed:04/09/19 <br /> Antimony 30.3 0.5 mg/kg 100 0.992 29.3 75-125 8.30 25 QM-01 <br /> Arsenic 86.0 1.0 100 2.12 83.9 75-125 3.08 25 <br /> Arsenic 86.0 0.5 100 2.12 83.9 75-125 3.08 25 <br /> Barium 216 0.5 100 150 66.9 75-125 11.0 25 QM-01 <br /> Beryllium 84.4 0.5 100 0.162 84.2 75-125 3.76 25 <br /> Cadmium 83.3 0.5 100 0.168 83.1 75-125 3.62 25 <br /> Chromium 111 0.5 100 25.0 85.6 75-125 1.79 25 <br /> Cobalt 91.6 0.5 100 12.6 79.0 75-125 2.80 25 <br /> Copper 119 0.5 100 43.8 74.9 75-125 0.169 25 QM-01 <br /> Lead 322 0.5 100 167 155 75-125 2.65 25 QM-01 <br /> Molybdenum 80.3 0.5 100 1.38 78.9 75-125 4.55 25 <br /> Nickel 120 0.5 100 38.4 81.3 75-125 4.27 25 <br /> Lead 322 1.0 100 167 155 75-125 2.65 25 QM-01 <br /> Selenium 68.0 0.5 100 ND 68.0 75-125 5.81 25 QM-01 <br /> Silver 77.7 0.5 100 ND 77.7 75-125 2.95 25 <br /> Thallium 70.5 0.5 100 3.70 66.8 75-125 4.73 25 QM-01 <br /> Vanadium 136 0.5 100 50.6 84.9 75-125 4.22 25 <br /> Zinc 166 0.5 100 89.0 76.7 75-125 0.121 25 <br /> Batch AID0085-EPA 7471A <br /> Blank(A]D0085-BLK1) Prepared:04/08/19 Analyzed:04/09/19 <br /> Mercury ND 0.016 mg/kg <br /> LCS(A]D0085-BS1) Prepared:04/08/19 Analyzed:04/09/19 <br /> Mercury 0.221 0.016 mg/kg 0.200 110 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 10 of 18 <br />