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Excelchem Environmental Labs <br /> DTE Stockton,LLC Project: Ash <br /> 2526 W.Washington St. Project Number: 4701052861 Date Reported: <br /> Stockton,CA 95203 Project Manager: Dan Crawford 11/15/17 17:57 <br /> Total Recoverable Metals-Quality Control <br /> Reporting Spike Source %REC RPD <br /> Analyte Result Limit Units Level Result %REC Limits RPD Limit Notes <br /> Batch A[KO100-EPA 6010B <br /> Matrix Spike Dup(A[KO100-MSD1) Source:1711070-01 Prepared&Analyzed: 11/14/17 <br /> Antimony 34.8 1.0 mg/kg 100 0.707 34.1 75-125 3.81 25 QM-01 <br /> Arsenic 115 1.0 100 18.2 96.7 75-125 1.05 25 <br /> Arsenic 115 1.0 100 18.2 96.7 75-125 1.05 25 <br /> Barium 450 2.0 100 360 90.0 75-125 5.57 25 <br /> Beryllium 87.9 0.5 100 0.110 87.8 75-125 1.36 25 <br /> Cadmium 92.9 1.0 100 1.05 91.8 75-125 0.247 25 <br /> Chromium 120 1.0 100 29.8 90.1 75-125 2.02 25 <br /> Cobalt 89.1 5.0 100 7.07 82.1 75-125 0.403 25 <br /> Copper 243 2.0 100 156 86.9 75-125 8.09 25 <br /> Lead 113 1.0 100 33.2 79.8 75-125 1.79 25 <br /> Molybdenum 88.5 1.0 100 2.66 85.8 75-125 1.29 25 <br /> Nickel 103 1.0 100 22.4 80.7 75-125 0.00 25 <br /> Lead 113 1.0 100 33.2 79.8 75-125 1.79 25 <br /> Selenium 86.7 2.0 100 ND 86.7 75-125 0.919 25 <br /> Silver 83.1 1.0 100 ND 83.1 75-125 1.03 25 <br /> Thallium 74.8 2.0 100 ND 74.8 75-125 1.08 25 QM-01 <br /> Vanadium 115 2.0 100 34.7 80.5 75-125 0.261 25 <br /> Zinc 389 2.0 100 298 91.5 75-125 5.03 25 <br /> Batch A[KO109-EPA 7471A <br /> Blank(A[KO109-BLK1) Prepared: 11/14/17 Analyzed:11/15/17 <br /> Mercury ND 0.016 mg/kg <br /> LCS(A[K0109-BS1) Prepared: 11/14/17 Analyzed:11/15/17 <br /> Mercury 0.206 0.016 mg/kg 0.200 103 80-120 <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 9 of 17 <br />