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Excelchem Environmental Labs <br /> DTE Stockton,LLC Project: Ash <br /> 2526 W.Washington St. Project Number: #4701180998 Date Reported: <br /> Stockton,CA 95203 Project Manager: Dan Crawford 02/22/18 17:17 <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\B0226-EPA 6010B <br /> Matrix Spike Dup(A\B0226-MSD1) Source:1802153-01 Prepared:02/21/18 Analyzed:02/22/18 <br /> Antimony 38.3 1.0 mg/kg 100 0.166 38.1 75-125 3.94 25 QM-01 <br /> Arsenic 99.3 1.0 100 1.24 98.1 75-125 2.84 25 <br /> Arsenic 99.3 1.0 100 1.24 98.1 75-125 2.84 25 <br /> Barium 262 2.0 100 174 87.6 75-125 5.71 25 <br /> Beryllium 94.0 0.5 100 0.040 94.0 75-125 3.29 25 <br /> Cadmium 96.6 1.0 100 0.039 96.6 75-125 3.15 25 <br /> Chromium 107 1.0 100 13.3 93.4 75-125 3.77 25 <br /> Cobalt 93.2 5.0 100 4.03 89.1 75-125 3.30 25 <br /> Copper 144 2.0 100 46.1 97.9 75-125 6.58 25 <br /> Lead 86.5 1.0 100 1.34 85.2 75-125 3.03 25 <br /> Molybdenum 93.3 1.0 100 0.638 92.7 75-125 3.76 25 <br /> Nickel 97.0 1.0 100 10.0 87.0 75-125 3.07 25 <br /> Lead 86.5 1.0 100 1.34 85.2 75-125 3.03 25 <br /> Selenium 94.2 2.0 100 ND 94.2 75-125 2.68 25 <br /> Silver 91.1 1.0 100 ND 91.1 75-125 5.04 25 <br /> Thallium 76.1 2.0 100 ND 76.1 75-125 2.76 25 <br /> Vanadium 110 2.0 100 22.1 88.4 75-125 4.94 25 <br /> Zinc 201 2.0 100 30.5 170 75-125 47.8 25 QM-11 <br /> Batch A\B0234-EPA 7471A <br /> Blank(A\B0234-BLK1) Prepared&Analyzed:02/22/18 <br /> Mercury ND 0.016 mg/kg <br /> LCS(A\B0234-BS1) Prepared&Analyzed:02/22/18 <br /> Mercury 0.186 0.016 mg/kg 0.200 92.8 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 16 <br />