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Excelchem Laboratories,Inc. <br /> DTE Stockton,LLC Project: 2020 Annual Bottom Ash Profiling <br /> 2526 W.Washington St. Project Number: 4700995195 Date Reported: <br /> Stockton,CA 95203 Project Manager: Genny Huffinan 04/10/20 21:46 <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 A^D0067-EPA 6010B <br /> LCS Dup(A A D0067-BSD1) Prepared:04/09/20 Analyzed:04/10/20 <br /> Antimony 20.9 2.0 mg/L 20.0 105 80-120 0.335 25 <br /> Arsenic 22.3 0.2 20.0 111 80-120 1.26 25 <br /> Barium ND 0.4 20.0 80-120 25 QR-04 <br /> Beryllium 19.1 0.1 20.0 95.7 80-120 0.313 25 <br /> Cadmium 20.2 0.2 20.0 101 80-120 0.198 25 <br /> Chromium 19.5 0.2 20.0 97.6 80-120 0.154 25 <br /> Cobalt 19.0 1.0 20.0 95.0 80-120 0.0526 25 <br /> Copper 18.1 0.4 20.0 90.4 80-120 0.990 25 <br /> Lead 18.8 0.2 20.0 93.8 80-120 0.749 25 <br /> Molybdenum 20.1 0.2 20.0 101 80-120 0.848 25 <br /> Nickel 19.0 0.2 20.0 94.8 80-120 0.158 25 <br /> Selenium 22.5 0.4 20.0 112 80-120 0.804 25 <br /> Silver ND 0.4 20.0 80-120 25 QR-04 <br /> Thallium 17.3 0.4 20.0 86.4 80-120 0.0579 25 <br /> Vanadium 18.6 0.4 20.0 93.1 80-120 1.28 25 <br /> Zinc 20.8 0.4 20.0 104 80-120 0.192 25 <br /> Matrix Spike(A^D0067-MS1) Source:2004043-02 Prepared:04/09/20 Analyzed:04/10/20 <br /> Antimony 21.2 2.0 mg/L 20.0 ND 106 75-125 <br /> Arsenic 22.4 0.2 20.0 0.272 111 75-125 <br /> Barium 24.8 0.4 20.0 5.45 96.7 75-125 <br /> Beryllium 19.2 0.1 20.0 ND 95.9 75-125 <br /> Cadmium 20.6 0.2 20.0 ND 103 75-125 <br /> Chromium 20.1 0.2 20.0 0.478 97.9 75-125 <br /> Cobalt 19.0 1.0 20.0 0.071 94.5 75-125 <br /> Copper 20.7 0.4 20.0 2.36 91.6 75-125 <br /> Lead 18.7 0.2 20.0 0.061 93.0 75-125 <br /> Molybdenum 20.1 0.2 20.0 0.101 99.8 75-125 <br /> Nickel 19.0 0.2 20.0 0.324 93.3 75-125 <br /> Selenium 22.3 0.4 20.0 ND 112 75-125 <br /> Silver 18.9 0.4 20.0 ND 94.6 75-125 <br /> Thallium 17.1 0.4 20.0 ND 85.4 75-125 <br /> Vanadium 19.0 0.4 20.0 0.416 92.8 75-125 <br /> Zinc 21.2 0.4 20.0 0.918 101 75-125 <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 13 of 19 <br />