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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 /> Bottom Ash Truck 4 Sample 2 <br /> 1904049-02(Soil) <br /> Reporting Date Date <br /> Analyte Result Limit Units Batch Prepared Analyzed Method Notes <br /> Wet Chemistry <br /> pH 12.555 0.10000 pH Units A]D0123 04/15/19 04/15/19 EPA 9040B <br /> Total Recoverable Metals <br /> Arsenic 5.1 1.0 mg/kg A]D0098 04/10/19 04/11/19 EPA 6010B <br /> Copper 71.4 2.0 " <br /> Lead 5.7 1.0 " <br /> STLC Analysis <br /> Arsenic 0.3 0.2 mg/L A]D0093 04/09/19 04/10/19 EPA 6010B <br /> Copper 2.3 0.4 " <br /> Lead 0.3 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 />