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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 04/12/19 16:19 <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]D0063-EPA 6010B <br /> Blank(A]D0063-BLK1) Prepared:04/08/19 Analyzed:04/09/19 <br /> Antimony ND 0.5 mg/kg <br /> Arsenic ND 1.0 <br /> Arsenic ND 0.5 <br /> Barium ND 0.5 <br /> Beryllium ND 0.5 <br /> Cadmium ND 0.5 <br /> Chromium ND 0.5 <br /> Cobalt ND 0.5 <br /> Copper ND 0.5 <br /> Lead ND 0.5 <br /> Molybdenum ND 0.5 <br /> Nickel ND 0.5 <br /> Lead ND 1.0 <br /> Selenium ND 0.5 <br /> Silver ND 0.5 <br /> Thallium ND 0.5 <br /> Vanadium ND 0.5 <br /> Zinc ND 0.5 <br /> LCS(A]D0063-BSI) Prepared:04/08/19 Analyzed:04/09/19 <br /> Antimony 90.1 0.5 mg/kg 100 90.1 80-120 <br /> Arsenic 88.4 0.5 100 88.4 80-120 <br /> Arsenic 88.4 1.0 100 88.4 80-120 <br /> Barium 87.6 0.5 100 87.6 80-120 <br /> Beryllium 91.7 0.5 100 91.7 80-120 <br /> Cadmium 88.8 0.5 100 88.8 80-120 <br /> Chromium 94.0 0.5 100 94.0 80-120 <br /> Cobalt 93.3 0.5 100 93.3 80-120 <br /> Copper 94.5 0.5 100 94.5 80-120 <br /> Lead 91.6 0.5 100 91.6 80-120 <br /> Molybdenum 94.6 0.5 100 94.6 80-120 <br /> Nickel 92.5 0.5 100 92.5 80-120 <br /> Lead 91.6 1.0 100 91.6 80-120 <br /> Selenium 84.0 0.5 100 84.0 80-120 <br /> Silver 86.8 0.5 100 86.8 80-120 <br /> Thallium 90.2 0.5 100 90.2 80-120 <br /> Vanadium 96.7 0.5 100 96.7 80-120 <br /> Zinc 90.5 0.5 100 90.5 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 8 of 18 <br />