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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 Huffman 04/10/20 21:23 <br /> Bottom Ash Truck 1,Sample 3 <br /> 2004042-03(Soil) <br /> Reporting Date Date <br /> Analyte Result Limit Units Batch Prepared Analyzed Method Notes <br /> Wet Chemistry <br /> pH 12.523 0.10000 pH Units A^D0071 04/10/20 04/10/20 EPA 9040B <br /> Total Recoverable Metals <br /> Arsenic 3.1 1.0 mg/kg A^D0057 04/07/20 04/09/20 EPA 6010B <br /> Copper 97.1 2.0 " <br /> Lead 4.9 1.0 " <br /> STLC Analysis <br /> Arsenic 0.2 0.2 mg/L A^D0066 04/09/20 04/10/20 EPA 6010B <br /> Copper 1.0 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 />