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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 /> LCS Dup(A\B0226-BSD1) Prepared:02/21/18 Analyzed:02/22/18 <br /> Antimony 102 1.0 mg/kg 100 102 80-120 0.782 25 <br /> Arsenic 99.8 1.0 100 99.8 80-120 0.928 25 <br /> Arsenic 99.8 1.0 100 99.8 80-120 0.928 25 <br /> Barium 98.8 2.0 100 98.8 80-120 0.323 25 <br /> Beryllium 100 0.5 100 100 80-120 0.499 25 <br /> Cadmium 99.2 1.0 100 99.2 80-120 0.953 25 <br /> Chromium 104 1.0 100 104 80-120 0.955 25 <br /> Cobalt 103 5.0 100 103 80-120 0.774 25 <br /> Copper 103 2.0 100 103 80-120 0.580 25 <br /> Lead 101 1.0 100 101 80-120 0.888 25 <br /> Molybdenum 104 1.0 100 104 80-120 0.959 25 <br /> Lead 101 1.0 100 101 80-120 0.888 25 <br /> Nickel 102 1.0 100 102 80-120 1.08 25 <br /> Selenium 97.8 2.0 100 97.8 80-120 1.01 25 <br /> Silver 100 1.0 100 100 80-120 0.797 25 <br /> Thallium 94.5 2.0 100 94.5 80-120 1.46 25 <br /> Vanadium 104 2.0 100 104 80-120 0.866 25 <br /> Zinc 99.8 2.0 100 99.8 80-120 1.07 25 <br /> Matrix Spike(A\B0226-MS1) Source:1802153-01 Prepared:02/21/18 Analyzed:02/22/18 <br /> Antimony 39.8 1.0 mg/kg 100 0.166 39.7 75-125 QM-01 <br /> Arsenic 102 1.0 100 1.24 101 75-125 <br /> Arsenic 102 1.0 100 1.24 101 75-125 <br /> Barium 277 2.0 100 174 103 75-125 <br /> Beryllium 97.2 0.5 100 0.040 97.2 75-125 <br /> Cadmium 99.7 1.0 100 0.039 99.7 75-125 <br /> Chromium 111 1.0 100 13.3 97.5 75-125 <br /> Cobalt 96.3 5.0 100 4.03 92.3 75-125 <br /> Copper 154 2.0 100 46.1 108 75-125 <br /> Lead 89.2 1.0 100 1.34 87.9 75-125 <br /> Molybdenum 96.9 1.0 100 0.638 96.2 75-125 <br /> Nickel 100 1.0 100 10.0 90.0 75-125 <br /> Lead 89.2 1.0 100 1.34 87.9 75-125 <br /> Selenium 96.7 2.0 100 ND 96.7 75-125 <br /> Silver 95.8 1.0 100 ND 95.8 75-125 <br /> Thallium 78.2 2.0 100 ND 78.2 75-125 <br /> Vanadium 116 2.0 100 22.1 94.0 75-125 <br /> Zinc 123 2.0 100 30.5 92.7 75-125 <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 8 of 16 <br />