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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 /> LCS Dup(A A D0057-BSDI) Prepared:04/07/20 Analyzed:04/09/20 <br /> Antimony 98.3 0.5 mg/kg 100 98.3 80-120 0.295 25 <br /> Arsenic 99.3 1.0 100 99.3 80-120 0.0101 25 <br /> Arsenic 99.3 0.5 100 99.3 80-120 0.0101 25 <br /> Barium 99.2 0.5 100 99.2 80-120 0.780 25 <br /> Beryllium 95.8 0.5 100 95.8 80-120 0.219 25 <br /> Cadmium 98.9 0.5 100 98.9 80-120 0.383 25 <br /> Chromium 99.1 0.5 100 99.1 80-120 0.242 25 <br /> Cobalt 102 0.5 100 102 80-120 0.491 25 <br /> Copper 105 0.5 100 105 80-120 0.761 25 <br /> Copper 105 2.0 100 105 80-120 0.761 25 <br /> Lead 99.4 0.5 100 99.4 80-120 0.612 25 <br /> Molybdenum 99.4 0.5 100 99.4 80-120 0.151 25 <br /> Lead 99.4 1.0 100 99.4 80-120 0.612 25 <br /> Nickel 98.6 0.5 100 98.6 80-120 0.142 25 <br /> Selenium 97.6 0.5 100 97.6 80-120 0.205 25 <br /> Silver 95.3 0.5 100 95.3 80-120 0.347 25 <br /> Thallium 102 0.5 100 102 80-120 0.392 25 <br /> Vanadium 104 0.5 100 104 80-120 0.575 25 <br /> Zinc 100 0.5 100 100 80-120 0.299 25 <br /> Matrix Spike(A^D0057-MS1) Source:2004050-03 Prepared:04/07/20 Analyzed:04/10/20 <br /> Antimony 33.0 0.5 mg/kg 100 2.18 30.8 75-125 QM-01 <br /> Arsenic 106 1.0 100 12.2 93.7 75-125 <br /> Arsenic 106 0.5 100 12.2 93.7 75-125 <br /> Barium 446 0.5 100 365 80.3 75-125 <br /> Beryllium 86.2 0.5 100 ND 86.2 75-125 <br /> Cadmium 91.4 0.5 100 0.697 90.7 75-125 <br /> Chromium 112 0.5 100 27.8 84.5 75-125 <br /> Cobalt 86.2 0.5 100 7.40 78.7 75-125 <br /> Copper 182 0.5 100 101 80.4 75-125 <br /> Lead 99.2 0.5 100 22.2 77.1 75-125 <br /> Copper 182 2.0 100 101 80.4 75-125 <br /> Molybdenum 84.0 0.5 100 1.80 82.2 75-125 <br /> Nickel 102 0.5 100 23.4 78.2 75-125 <br /> Lead 99.2 1.0 100 22.2 77.1 75-125 <br /> Selenium 86.5 0.5 100 ND 86.5 75-125 <br /> Silver 81.4 0.5 100 ND 81.4 75-125 <br /> Thallium 63.7 0.5 100 ND 63.7 75-125 QM-01 <br /> Vanadium 116 0.5 100 36.8 79.2 75-125 <br /> Zinc 310 0.5 100 224 85.8 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 9 of 19 <br />