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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 04/12/19 16:14 <br /> Bottom Ash Truck 2 Sample 2 <br /> 1904031-02(Soil) <br /> Reporting Date Date <br /> Analyte Result Limit Units Batch Prepared Analyzed Method Notes <br /> Wet Chemistry <br /> pH 12.605 0.10000 pH Units A]D0113 04/12/19 04/12/19 EPA 9040B <br /> Total Recoverable Metals <br /> Arsenic 6.0 1.0 mg/kg A]D0063 04/08/19 04/09/19 EPA 6010B <br /> Copper 122 2.0 " <br /> Lead 6.5 1.0 " <br /> STLC Analysis <br /> Arsenic 0.4 0.2 mg/L A]D0092 04/09/19 04/10/19 EPA 6010B <br /> Copper 2.7 0.4 " <br /> Lead 0.4 0.2 " <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 4of18 <br />