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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 21:46 <br /> Bottom Ash Truck 2,Sample 3 <br /> 2004043-03(Soil) <br /> Reporting Date Date <br /> Analyte Result Limit Units Batch Prepared Analyzed Method Notes <br /> Wet Chemistry <br /> pH 12.518 0.10000 pH Units A^D0071 04/10/20 04/10/20 EPA 9040B <br /> Total Recoverable Metals <br /> Arsenic 4.9 1.0 mg/kg A^D0057 04/07/20 04/09/20 EPA 6010B <br /> Copper 109 2.0 " <br /> Lead 2.8 1.0 " <br /> STLC Analysis <br /> Arsenic 0.3 0.2 mg/L A^D0067 04/09/20 04/10/20 EPA 6010B <br /> Copper 2.2 0.4 " <br /> Lead ND 0.2 " <br /> Exoelohem Laboratories.Tnc. 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 5 of 19 <br />