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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 16:45 <br /> Bottom Ash Truck 3 Sample 1 <br /> 1904048-01(Soil) <br /> Reporting Date Date <br /> Analyte Result Limit Units Batch Prepared Analyzed Method Notes <br /> Wet Chemistry <br /> pH 12.563 0.10000 pH Units A]D0123 04/15/19 04/15/19 EPA 9040B <br /> Total Recoverable Metals <br /> Arsenic 5.6 1.0 mg/kg A]D0098 04/10/19 04/11/19 EPA 6010B <br /> Antimony ND 0.5 <br /> Arsenic 5.6 0.5 " <br /> Barium 277 0.5 " <br /> Beryllium ND 0.5 " <br /> Cadmium ND 0.5 " <br /> Chromium 20.0 0.5 " <br /> Cobalt 6.0 0.5 " <br /> Copper 62.3 0.5 " <br /> Lead 6.3 0.5 " <br /> Molybdenum 1.4 0.5 " <br /> Nickel 21.4 0.5 " <br /> Selenium ND 0.5 " <br /> Silver 0.7 0.5 " <br /> Thallium ND 0.5 " <br /> Vanadium 27.9 0.5 " <br /> Zinc 45.8 0.5 " <br /> Copper 62.3 2.0 " <br /> Lead 6.3 1.0 " <br /> Mercury ND 0.016 A]D0107 04/11/19 04/12/19 EPA7471A <br /> STLC Metals <br /> Antimony ND 2.0 mg/L A]D0093 04/09/19 04/10/19 EPA 6010B <br /> Arsenic 0.4 0.2 " <br /> Barium 5.2 0.4 " <br /> Beryllium ND 0.1 " <br /> Cadmium ND 0.2 " <br /> Chromium 0.5 0.2 " <br /> Cobalt ND 1.0 " <br /> Copper 2.4 0.4 " <br /> Lead 0.2 0.2 " <br /> Molybdenum ND 0.2 <br /> Nickel 0.4 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 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 2of18 <br />