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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 16:48 <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 /> Blank(A]D0098-BLK1) Prepared&Analyzed:04/10/19 <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 /> Copper ND 2.0 <br /> Lead ND 0.5 <br /> Molybdenum ND 0.5 <br /> Lead ND 1.0 " <br /> Nickel ND 0.5 <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]D0098-BS1) Prepared&Analyzed:04/10/19 <br /> Antimony 98.5 0.5 mg/kg 100 98.5 80-120 <br /> Arsenic 95.8 0.5 100 95.8 80-120 <br /> Arsenic 95.8 1.0 100 95.8 80-120 <br /> Barium 97.3 0.5 100 97.3 80-120 <br /> Beryllium 98.0 0.5 100 98.0 80-120 <br /> Cadmium 93.9 0.5 100 93.9 80-120 <br /> Chromium 99.0 0.5 100 99.0 80-120 <br /> Cobalt 97.4 0.5 100 97.4 80-120 <br /> Copper 107 0.5 100 107 80-120 <br /> Copper 107 2.0 100 107 80-120 <br /> Lead 97.5 0.5 100 97.5 80-120 <br /> Molybdenum 101 0.5 100 101 80-120 <br /> Lead 97.5 1.0 100 97.5 80-120 <br /> Nickel 97.5 0.5 100 97.5 80-120 <br /> Selenium 91.3 0.5 100 91.3 80-120 <br /> Silver 92.6 0.5 100 92.6 80-120 <br /> Thallium 97.1 0.5 100 97.1 80-120 <br /> Vanadium 99.0 0.5 100 99.0 80-120 <br /> Zinc 95.0 0.5 100 95.0 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 8 of 18 <br />