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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 AAD0067-EPA 6010B <br /> Matrix Spike Dup(AAD0067-MSD1) 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 0.00 25 <br /> Arsenic 22.4 0.2 20.0 0.272 111 75-125 0.0891 25 <br /> Barium 24.8 0.4 20.0 5.45 96.8 75-125 0.0403 25 <br /> Beryllium 19.2 0.1 20.0 ND 96.2 75-125 0.364 25 <br /> Cadmium 20.5 0.2 20.0 ND 103 75-125 0.146 25 <br /> Chromium 20.0 0.2 20.0 0.478 97.8 75-125 0.150 25 <br /> Cobalt 19.0 1.0 20.0 0.071 94.4 75-125 0.105 25 <br /> Copper 20.8 0.4 20.0 2.36 92.2 75-125 0.627 25 <br /> Lead 18.6 0.2 20.0 0.061 92.9 75-125 0.161 25 <br /> Molybdenum 20.0 0.2 20.0 0.101 99.7 75-125 0.0997 25 <br /> Nickel 19.0 0.2 20.0 0.324 93.3 75-125 0.00 25 <br /> Selenium 22.3 0.4 20.0 ND 111 75-125 0.269 25 <br /> Silver 19.1 0.4 20.0 ND 95.7 75-125 1.16 25 <br /> Thallium 17.1 0.4 20.0 ND 85.5 75-125 0.176 25 <br /> Vanadium 19.1 0.4 20.0 0.416 93.5 75-125 0.735 25 <br /> Zinc 21.2 0.4 20.0 0.918 101 75-125 0.0944 25 <br /> Batch AAD0069-EPA 7470A <br /> Blank(AAD0069-BLK1) Prepared&Analyzed:04/10/20 <br /> Mercury ND 0.0160 mg/L <br /> LCS(AAD0069-BS1) Prepared&Analyzed:04/10/20 <br /> Mercury 0.172 0.0160 mg/L 0.200 86.0 75-120 <br /> LCS Dup(AAD0069-BSD1) Prepared&Analyzed:04/10/20 <br /> Mercury 0.176 0.0160 mg/L 0.200 88.0 75-120 2.30 20 <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 14 of 19 <br />