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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 21:23 <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 AAD0066-EPA 6010B <br /> Matrix Spike Dup(AAD0066-MSD1) Source:2004044-02 Prepared:04/09/20 Analyzed:04/10/20 <br /> Antimony 21.5 2.0 mg/L 20.0 ND 107 75-125 0.186 25 <br /> Arsenic 22.7 0.2 20.0 0.286 112 75-125 0.0881 25 <br /> Barium 26.3 0.4 20.0 6.76 97.5 75-125 0.607 25 <br /> Beryllium 19.2 0.1 20.0 ND 96.0 75-125 0.933 25 <br /> Cadmium 20.7 0.2 20.0 ND 103 75-125 0.386 25 <br /> Chromium 20.1 0.2 20.0 0.478 98.3 75-125 0.496 25 <br /> Cobalt 19.1 1.0 20.0 0.089 95.1 75-125 0.574 25 <br /> Copper 20.7 0.4 20.0 2.50 90.9 75-125 1.54 25 <br /> Lead 18.8 0.2 20.0 0.090 93.6 75-125 0.478 25 <br /> Molybdenum 20.1 0.2 20.0 0.108 100 75-125 0.644 25 <br /> Nickel 19.2 0.2 20.0 0.374 93.9 75-125 0.625 25 <br /> Selenium 22.5 0.4 20.0 ND 112 75-125 0.311 25 <br /> Silver 18.8 0.4 20.0 ND 94.0 75-125 1.74 25 <br /> Thallium 17.1 0.4 20.0 ND 85.6 75-125 0.698 25 <br /> Vanadium 18.8 0.4 20.0 0.452 92.0 75-125 1.68 25 <br /> Zinc 23.0 0.4 20.0 2.79 101 75-125 0.864 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 />