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Excelchem Laboratories,Inc. <br /> DTE Stockton,LLC Project: 2020 Annual Fly Ash Profiling <br /> 2526 W.Washington St. Project Number: 4700995195 Date Reported: <br /> Stockton,CA 95203 Project Manager: Genny Huffinan 04/10/20 21:34 <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 AAD0056-EPA 6010B <br /> LCS Dup(AAD0056-BSDI) Prepared:04/07/20 Analyzed:04/10/20 <br /> Antimony 97.2 0.5 mg/kg 100 97.2 80-120 0.226 25 <br /> Arsenic 96.2 1.0 100 96.2 80-120 0.477 25 <br /> Arsenic 96.2 0.5 100 96.2 80-120 0.477 25 <br /> Barium 95.2 0.5 100 95.2 80-120 1.17 25 <br /> Beryllium 97.8 0.5 100 97.8 80-120 0.0511 25 <br /> Cadmium 94.4 0.5 100 94.4 80-120 0.201 25 <br /> Chromium 98.7 0.5 100 98.7 80-120 0.132 25 <br /> Cobalt 97.7 0.5 100 97.7 80-120 0.194 25 <br /> Copper 105 0.5 100 105 80-120 0.670 25 <br /> Copper 105 2.0 100 105 80-120 0.670 25 <br /> Lead 98.4 0.5 100 98.4 80-120 0.163 25 <br /> Molybdenum 99.2 0.5 100 99.2 80-120 0.0403 25 <br /> Lead 98.4 1.0 100 98.4 80-120 0.163 25 <br /> Nickel 97.4 0.5 100 97.4 80-120 0.0821 25 <br /> Selenium 93.0 0.5 100 93.0 80-120 0.151 25 <br /> Silver 99.4 0.5 100 99.4 80-120 0.492 25 <br /> Thallium 96.6 0.5 100 96.6 80-120 0.372 25 <br /> Vanadium 104 0.5 100 104 80-120 0.289 25 <br /> Zinc 100 0.5 100 100 80-120 0.199 25 <br /> Matrix Spike(A^D0056-MS1) Source:2004048-01 Prepared:04/07/20 Analyzed:04/10/20 <br /> Antimony 34.2 0.5 mg/kg 100 2.15 32.0 75-125 QM-01 <br /> Arsenic 106 1.0 100 12.6 93.3 75-125 <br /> Arsenic 106 0.5 100 12.6 93.3 75-125 <br /> Barium 426 0.5 100 365 61.1 75-125 QM-01 <br /> Beryllium 88.1 0.5 100 0.089 88.0 75-125 <br /> Cadmium 91.5 0.5 100 0.862 90.7 75-125 <br /> Chromium 111 0.5 100 28.1 83.3 75-125 <br /> Cobalt 86.9 0.5 100 7.51 79.4 75-125 <br /> Copper 204 0.5 100 116 88.8 75-125 <br /> Copper 204 2.0 100 116 88.8 75-125 <br /> Lead 106 0.5 100 27.6 78.0 75-125 <br /> Molybdenum 86.0 0.5 100 2.19 83.8 75-125 <br /> Nickel 101 0.5 100 22.3 78.3 75-125 <br /> Lead 106 1.0 100 27.6 78.0 75-125 <br /> Selenium 86.9 0.5 100 ND 86.9 75-125 <br /> Silver 83.7 0.5 100 ND 83.7 75-125 <br /> Thallium 66.6 0.5 100 ND 66.6 75-125 QM-01 <br /> Vanadium 121 0.5 100 38.6 82.5 75-125 <br /> Zinc 334 0.5 100 260 73.9 75-125 QM-01 <br /> Excelchem Laboratories.inc. 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 19 <br />