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Excelchem Laboratories,Inc. <br /> DTE Stockton,LLC Project: 2019 Annual Fly Ash Profiling <br /> 2526 W.Washington St. Project Number: 4701254256 Date Reported: <br /> Stockton,CA 95203 Project Manager: Genny Huffinan 04/15/19 16:40 <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 A]D0098-EPA 6010B <br /> Matrix Spike Dup(A]D0098-MSD1) Source:1904048-03 Prepared&Analyzed:04/10/19 <br /> Antimony 35.2 0.5 mg/kg 100 0.493 34.7 75-125 7.66 25 QM-01 <br /> Arsenic 98.1 0.5 100 4.33 93.7 75-125 1.45 25 <br /> Arsenic 98.1 1.0 100 4.33 93.7 75-125 1.45 25 <br /> Barium 334 0.5 100 239 94.8 75-125 11.0 25 <br /> Beryllium 93.0 0.5 100 0.030 92.9 75-125 0.204 25 <br /> Cadmium 90.6 0.5 100 0.073 90.5 75-125 0.485 25 <br /> Chromium 109 0.5 100 18.6 90.6 75-125 0.730 25 <br /> Cobalt 87.7 0.5 100 4.94 82.8 75-125 0.0342 25 <br /> Copper 195 0.5 100 66.8 128 75-125 12.8 25 QM-01 <br /> Lead 83.9 0.5 100 4.08 79.8 75-125 0.452 25 <br /> Molybdenum 90.3 0.5 100 1.08 89.2 75-125 0.243 25 <br /> Nickel 98.9 0.5 100 15.5 83.3 75-125 1.74 25 <br /> Lead 83.9 1.0 100 4.08 79.8 75-125 0.452 25 <br /> Selenium 85.3 0.5 100 ND 85.3 75-125 0.491 25 <br /> Silver 81.7 0.5 100 0.682 81.0 75-125 6.00 25 <br /> Thallium 72.4 0.5 100 ND 72.4 75-125 0.944 25 QM-01 <br /> Vanadium 114 0.5 100 24.2 89.3 75-125 1.78 25 <br /> Zinc 129 0.5 100 37.3 91.9 75-125 26.8 25 QM-01 <br /> Batch AID0107-EPA 7471A <br /> Blank(A]D0107-BLK1) Prepared:04/11/19 Analyzed:04/12/19 <br /> Mercury ND 0.016 mg/kg <br /> LCS(A]D0107-BS1) Prepared:04/11/19 Analyzed:04/12/19 <br /> Mercury 0.196 0.016 mg/kg 0.200 98.0 80-120 <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 10 of 18 <br />