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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 1 <br /> 1904049-01(Soil) <br /> Reporting Date Date <br /> Analyte Result Limit Units Batch Prepared Analyzed Method Notes <br /> Wet Chemistry <br /> pH 12.543 0.10000 pH Units A]D0123 04/15/19 04/15/19 EPA 9040B <br /> Total Recoverable Metals <br /> Arsenic 4.4 1.0 mg/kg A]D0098 04/10/19 04/11/19 EPA6010B <br /> Antimony 0.5 0.5 " <br /> Arsenic 4.4 0.5 " <br /> Barium 306 0.5 " <br /> Beryllium ND 0.5 " <br /> Cadmium ND 0.5 " <br /> Chromium 21.2 0.5 " <br /> Cobalt 5.8 0.5 " <br /> Copper 82.9 0.5 " <br /> Lead 5.9 0.5 " <br /> Molybdenum 1.2 0.5 " <br /> Nickel 25.4 0.5 " <br /> Selenium ND 0.5 " <br /> Silver 1.0 0.5 " <br /> Thallium ND 0.5 " <br /> Vanadium 25.9 0.5 " <br /> Zinc 141 0.5 " <br /> Copper 82.9 2.0 " <br /> Lead 5.9 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 0.2 0.2 " <br /> Barium 5.4 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 0.3 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 0.5 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 />