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Excelchem Laboratories,Inc. <br /> DTE Stockton,LLC Project: 2020 Annual Fly Ash Profiling <br /> 2526 W.Washington St. Project Number: 4700995195 Date Reported: <br /> Stockton,CA 95203 Project Manager: Genny Huffinan 04/10/20 21:33 <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 AAD0044-EPA 6010B <br /> Matrix Spike Dup(AAD0044-MSD1) Source:2004026-01 Prepared:04/07/20 Analyzed:04/09/20 <br /> Antimony 57.9 0.5 mg/kg 100 0.291 57.6 75-125 5.30 25 QM-01 <br /> Arsenic 100 1.0 100 0.292 99.9 75-125 1.68 25 <br /> Arsenic 100 0.5 100 0.292 99.9 75-125 1.68 25 <br /> Barium 108 0.5 100 9.05 99.0 75-125 1.49 25 <br /> Beryllium 99.2 0.5 100 ND 99.2 75-125 2.42 25 <br /> Cadmium 98.8 0.5 100 ND 98.8 75-125 1.79 25 <br /> Chromium 102 0.5 100 3.53 98.2 75-125 11.8 25 <br /> Cobalt 98.6 0.5 100 0.526 98.1 75-125 1.99 25 <br /> Copper 105 0.5 100 6.29 98.4 75-125 2.81 25 <br /> Lead 98.0 0.5 100 2.30 95.7 75-125 1.68 25 <br /> Copper 105 2.0 100 6.29 98.4 75-125 2.81 25 <br /> Molybdenum 95.7 0.5 100 0.281 95.5 75-125 1.56 25 <br /> Lead 98.0 1.0 100 2.30 95.7 75-125 1.68 25 <br /> Nickel 101 0.5 100 5.04 95.9 75-125 5.12 25 <br /> Selenium 97.3 0.5 100 ND 97.3 75-125 2.02 25 <br /> Silver 71.2 0.5 100 ND 71.2 75-125 0.464 25 QM-01 <br /> Thallium 92.0 0.5 100 ND 92.0 75-125 2.54 25 <br /> Vanadium 101 0.5 100 1.70 99.2 75-125 3.26 25 <br /> Zinc 110 0.5 100 11.8 97.8 75-125 1.47 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 />