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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 /> Bottom Ash Truck 1,Sample 1 <br /> 2004042-01(Soil) <br /> Reporting Date Date <br /> Analyte Result Limit Units Batch Prepared Analyzed Method Notes <br /> Wet Chemistry <br /> pH 12.551 0.10000 pH Units A^D0071 04/10/20 04/10/20 EPA 9040B <br /> Total Recoverable Metals <br /> Arsenic 3.4 1.0 mg/kg A^D0057 04/07/20 04/09/20 EPA 6010B <br /> Antimony 0.7 0.5 " <br /> Arsenic 3.4 0.5 " <br /> Barium 301 0.5 " <br /> Beryllium ND 0.5 " <br /> Cadmium ND 0.5 " <br /> Chromium 19.3 0.5 " <br /> Cobalt 6.0 0.5 " <br /> Copper 99.0 0.5 " <br /> Lead 4.5 0.5 " <br /> Molybdenum 1.2 0.5 " <br /> Nickel 17.6 0.5 " <br /> Selenium ND 0.5 " <br /> Silver ND 0.5 " <br /> Thallium ND 0.5 " <br /> Vanadium 35.9 0.5 " <br /> Zinc 57.8 0.5 " <br /> Copper 99.0 2.0 " " <br /> Lead 4.5 1.0 " " <br /> Mercury ND 0.016 A^D0068 04/10/20 04/10/20 EPA7471A <br /> STLC Metals <br /> Antimony ND 2.0 mg/L A^D0066 04/09/20 04/10/20 EPA 6010B <br /> Arsenic 0.2 0.2 " " <br /> Barium 6.4 0.4 " " <br /> Beryllium ND 0.1 " " <br /> Cadmium ND 0.2 " " <br /> Chromium 0.4 0.2 " " <br /> Cobalt ND 1.0 " " <br /> Copper 2.0 0.4 " " <br /> Lead ND 0.2 " <br /> Molybdenum ND 0.2 <br /> Nickel 0.3 0.2 " <br /> Selenium ND 0.4 " <br /> Silver ND 0.4 " <br /> Thallium ND 0.4 <br /> Vanadium 0.4 0.4 " <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 2 of 19 <br />