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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 /> 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 AAD0057-EPA 6010B <br /> Matrix Spike Dup(AAD0057-MSD1) Source:2004050-03 Prepared:04/07/20 Analyzed:04/10/20 <br /> Antimony 37.7 0.5 mg/kg 100 2.18 35.5 75-125 13.3 25 QM-01 <br /> Arsenic 110 1.0 100 12.2 98.2 75-125 4.16 25 <br /> Arsenic 110 0.5 100 12.2 98.2 75-125 4.16 25 <br /> Barium 469 0.5 100 365 104 75-125 5.12 25 <br /> Beryllium 90.5 0.5 100 ND 90.5 75-125 4.81 25 <br /> Cadmium 95.3 0.5 100 0.697 94.6 75-125 4.19 25 <br /> Chromium 117 0.5 100 27.8 89.5 75-125 4.36 25 <br /> Cobalt 90.0 0.5 100 7.40 82.6 75-125 4.38 25 <br /> Copper 191 0.5 100 101 89.7 75-125 4.99 25 <br /> Lead 105 0.5 100 22.2 82.9 75-125 5.76 25 <br /> Copper 191 2.0 100 101 89.7 75-125 4.99 25 <br /> Molybdenum 89.0 0.5 100 1.80 87.1 75-125 5.77 25 <br /> Lead 105 1.0 100 22.2 82.9 75-125 5.76 25 <br /> Nickel 106 0.5 100 23.4 82.9 75-125 4.52 25 <br /> Selenium 90.2 0.5 100 ND 90.2 75-125 4.20 25 <br /> Silver 85.2 0.5 100 ND 85.2 75-125 4.57 25 <br /> Thallium 67.3 0.5 100 ND 67.3 75-125 5.49 25 QM-01 <br /> Vanadium 122 0.5 100 36.8 85.3 75-125 5.12 25 <br /> Zinc 318 0.5 100 224 94.5 75-125 2.77 25 <br /> Batch AAD0068-EPA 7471A <br /> Blank(AAD0068-BLKI) Prepared&Analyzed:04/10/20 <br /> Mercury ND 0.016 mg/kg <br /> LCS(AAD0068-BS1) Prepared&Analyzed:04/10/20 <br /> Mercury 0.219 0.016 mg/kg 0.200 110 80-120 <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 10 of 19 <br />