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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 16:19 <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 /> LCS Dup(A]D0063-BSD1) Prepared:04/08/19 Analyzed:04/09/19 <br /> Antimony 89.8 0.5 mg/kg 100 89.8 80-120 0.267 25 <br /> Arsenic 89.4 0.5 100 89.4 80-120 1.16 25 <br /> Arsenic 89.4 1.0 100 89.4 80-120 1.16 25 <br /> Barium 92.4 0.5 100 92.4 80-120 5.34 25 <br /> Beryllium 91.8 0.5 100 91.8 80-120 0.0981 25 <br /> Cadmium 89.4 0.5 100 89.4 80-120 0.595 25 <br /> Chromium 94.2 0.5 100 94.2 80-120 0.234 25 <br /> Cobalt 93.5 0.5 100 93.5 80-120 0.278 25 <br /> Copper 93.6 0.5 100 93.6 80-120 0.925 25 <br /> Lead 92.0 0.5 100 92.0 80-120 0.425 25 <br /> Molybdenum 94.8 0.5 100 94.8 80-120 0.232 25 <br /> Nickel 92.8 0.5 100 92.8 80-120 0.237 25 <br /> Lead 92.0 1.0 100 92.0 80-120 0.425 25 <br /> Selenium 84.6 0.5 100 84.6 80-120 0.712 25 <br /> Silver 91.2 0.5 100 91.2 80-120 4.83 25 <br /> Thallium 90.1 0.5 100 90.1 80-120 0.0998 25 <br /> Vanadium 96.5 0.5 100 96.5 80-120 0.228 25 <br /> Zinc 90.4 0.5 100 90.4 80-120 0.0111 25 <br /> Matrix Spike(A]D0063-MSI) Source:1904036-03 Prepared:04/08/19 Analyzed:04/09/19 <br /> Antimony 32.9 0.5 mg/kg 100 0.992 31.9 75-125 QM-01 <br /> Arsenic 88.7 0.5 100 2.12 86.6 75-125 <br /> Arsenic 88.7 1.0 100 2.12 86.6 75-125 <br /> Barium 194 0.5 100 150 44.3 75-125 QM-01 <br /> Beryllium 87.6 0.5 100 0.162 87.4 75-125 <br /> Cadmium 86.3 0.5 100 0.168 86.2 75-125 <br /> Chromium 113 0.5 100 25.0 87.6 75-125 <br /> Cobalt 94.2 0.5 100 12.6 81.6 75-125 <br /> Copper 118 0.5 100 43.8 74.7 75-125 QM-01 <br /> Lead 313 0.5 100 167 147 75-125 QM-01 <br /> Molybdenum 84.0 0.5 100 1.38 82.6 75-125 <br /> Nickel 115 0.5 100 38.4 76.3 75-125 <br /> Lead 313 1.0 100 167 147 75-125 QM-01 <br /> Selenium 72.0 0.5 100 ND 72.0 75-125 QM-01 <br /> Silver 80.1 0.5 100 ND 80.1 75-125 <br /> Thallium 73.9 0.5 100 3.70 70.2 75-125 QM-01 <br /> Vanadium 130 0.5 100 50.6 79.3 75-125 <br /> Zinc 166 0.5 100 89.0 76.5 75-125 <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 9 of 18 <br />