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Excelchem Laboratories,Inc. <br /> DTE Stockton,LLC Project: 2019 Annual Bottom Ash Profiling <br /> 2526 W.Washington St. Project Number: 4701254256 Date Reported: <br /> Stockton,CA 95203 Project Manager: Genny Huffinan 04/15/19 16:45 <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]D0093-EPA 6010B <br /> Matrix Spike Dup(A]D0093-MSD1) Source:1904046-03 Prepared:04/09/19 Analyzed:04/10/19 <br /> Antimony 19.8 2.0 mg/L 20.0 0.183 97.8 75-125 3.82 25 <br /> Arsenic 24.8 0.2 20.0 1.36 117 75-125 3.38 25 <br /> Barium 26.8 0.4 20.0 5.10 108 75-125 4.10 25 <br /> Beryllium 22.8 0.1 20.0 0.003 114 75-125 3.11 25 <br /> Cadmium 23.7 0.2 20.0 0.084 118 75-125 3.65 25 <br /> Chromium 23.6 0.2 20.0 0.605 115 75-125 3.62 25 <br /> Cobalt 21.8 1.0 20.0 0.060 109 75-125 3.60 25 <br /> Copper 24.2 0.4 20.0 2.04 111 75-125 2.08 25 <br /> Lead 21.9 0.2 20.0 0.752 106 75-125 3.54 25 <br /> Molybdenum 23.4 0.2 20.0 0.137 116 75-125 4.14 25 <br /> Nickel 21.9 0.2 20.0 0.295 108 75-125 3.72 25 <br /> Selenium 21.7 0.4 20.0 0.329 107 75-125 3.49 25 <br /> Silver 19.8 0.4 20.0 0.100 98.3 75-125 4.64 25 <br /> Thallium 19.9 0.4 20.0 ND 99.5 75-125 3.12 25 <br /> Vanadium 21.2 0.4 20.0 0.209 105 75-125 2.52 25 <br /> Zinc 32.0 0.4 20.0 9.26 114 75-125 2.19 25 <br /> Batch A]D0106-EPA 7470A <br /> Blank(A]D0106-BLK1) Prepared:04/11/19 Analyzed:04/12/19 <br /> Mercury ND 0.00240 mg/L <br /> LCS(A]D0106-BS1) Prepared:04/11/19 Analyzed:04/12/19 <br /> Mercury 0.0338 0.00240 mg/L 0.0400 84.4 75-120 <br /> LCS Dup(A]D0106-BSD1) Prepared:04/11/19 Analyzed:04/12/19 <br /> Mercury 0.0334 0.00240 mg/L 0.0400 83.6 75-120 0.952 20 <br /> Excelchem Environmental Lab. 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 18 <br />