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Excelchem Environmental Labs <br /> DTE Stockton,LLC Project: Ash <br /> 2526 W.Washington St. Project Number: [none] Date Reported: <br /> Stockton,CA 95203 Project Manager: Dan Crawford 02/20/18 16:41 <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\B0160-EPA 6010B <br /> LCS Dup(A\B0160-BSD1) Prepared&Analyzed:02/16/18 <br /> Antimony 97.5 1.0 mg/kg 100 97.5 80-120 0.514 25 <br /> Arsenic 94.9 1.0 100 94.9 80-120 0.412 25 <br /> Arsenic 94.9 1.0 100 94.9 80-120 0.412 25 <br /> Barium 101 2.0 100 101 80-120 0.787 25 <br /> Beryllium 94.4 0.5 100 94.4 80-120 0.180 25 <br /> Cadmium 99.4 1.0 100 99.4 80-120 0.0201 25 <br /> Chromium 96.2 1.0 100 96.2 80-120 0.135 25 <br /> Cobalt 102 5.0 100 102 80-120 0.197 25 <br /> Copper 94.6 2.0 100 94.6 80-120 0.148 25 <br /> Lead 95.5 1.0 100 95.5 80-120 0.252 25 <br /> Molybdenum 98.5 1.0 100 98.5 80-120 0.0812 25 <br /> Lead 95.5 1.0 100 95.5 80-120 0.252 25 <br /> Nickel 94.7 1.0 100 94.7 80-120 0.222 25 <br /> Selenium 94.0 2.0 100 94.0 80-120 0.930 25 <br /> Silver 91.1 1.0 100 91.1 80-120 0.515 25 <br /> Thallium 101 2.0 100 101 80-120 0.197 25 <br /> Vanadium 93.6 2.0 100 93.6 80-120 0.0641 25 <br /> Zinc 91.9 2.0 100 91.9 80-120 0.142 25 <br /> Matrix Spike(A\B0160-MS1) Source:1802106-01 Prepared&Analyzed:02/16/18 <br /> Antimony 25.1 1.0 mg/kg 100 0.834 24.3 75-125 QM-01 <br /> Arsenic 88.1 1.0 100 0.958 87.1 75-125 <br /> Arsenic 88.1 1.0 100 0.958 87.1 75-125 <br /> Barium 260 2.0 100 207 53.0 75-125 QM-01 <br /> Beryllium 89.5 0.5 100 0.199 89.3 75-125 <br /> Cadmium 95.5 1.0 100 ND 95.5 75-125 <br /> Chromium 152 1.0 100 47.2 104 75-125 <br /> Cobalt 107 5.0 100 17.2 90.2 75-125 <br /> Copper 110 2.0 100 24.2 86.3 75-125 <br /> Lead 98.9 1.0 100 20.6 78.3 75-125 <br /> Molybdenum 81.8 1.0 100 0.143 81.7 75-125 <br /> Lead 98.9 1.0 100 20.6 78.3 75-125 <br /> Nickel 137 1.0 100 45.4 91.9 75-125 <br /> Selenium 83.7 2.0 100 ND 83.7 75-125 <br /> Silver 83.7 1.0 100 ND 83.7 75-125 <br /> Thallium 83.8 2.0 100 0.260 83.5 75-125 <br /> Vanadium 126 2.0 100 45.8 80.0 75-125 <br /> Zinc 136 2.0 100 50.9 85.5 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 />