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Excelchem Laboratories,Inc. <br /> DTE Stockton,LLC Project: 2020 Annual Bottom Ash Profiling <br /> 2526 W.Washington St. Project Number: 4700995195 Date Reported: <br /> Stockton,CA 95203 Project Manager: Genny Huffinan 04/10/20 21:23 <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 AAD0057-EPA 6010B <br /> Blank(AAD0057-BLK1) Prepared:04/07/20 Analyzed:04/09/20 <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 /> Copper ND 2.0 <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 0.572 0.5 QB-01 <br /> LCS(A^D0057-BS1) Prepared:04/07/20 Analyzed:04/09/20 <br /> Antimony 98.0 0.5 mg/kg 100 98.0 80-120 <br /> Arsenic 99.3 0.5 100 99.3 80-120 <br /> Arsenic 99.3 1.0 100 99.3 80-120 <br /> Barium 98.4 0.5 100 98.4 80-120 <br /> Beryllium 96.0 0.5 100 96.0 80-120 <br /> Cadmium 99.3 0.5 100 99.3 80-120 <br /> Chromium 99.4 0.5 100 99.4 80-120 <br /> Cobalt 102 0.5 100 102 80-120 <br /> Copper 106 0.5 100 106 80-120 <br /> Lead 100 0.5 100 100 80-120 <br /> Copper 106 2.0 100 106 80-120 <br /> Molybdenum 99.5 0.5 100 99.5 80-120 <br /> Nickel 98.8 0.5 100 98.8 80-120 <br /> Lead 100 1.0 100 100 80-120 <br /> Selenium 97.4 0.5 100 97.4 80-120 <br /> Silver 95.0 0.5 100 95.0 80-120 <br /> Thallium 102 0.5 100 102 80-120 <br /> Vanadium 105 0.5 100 105 80-120 <br /> Zinc 100 0.5 100 100 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 8 of 19 <br />