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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 /> STLC Metals-Quality Control <br /> Reporting Spike Source %REC RPD <br /> Analyte Result Limit Units Level Result %REC Limits RPD Limit Notes <br /> Batch A\B0230-EPA 6010B <br /> Matrix Spike(A\B0230-MS1) Source:1802153-01 Prepared&Analyzed:02/22/18 <br /> Antimony 21.3 2.0 mg/L 20.0 0.024 107 75-125 <br /> Arsenic 22.3 0.2 20.0 0.095 111 75-125 <br /> Barium 22.8 0.4 20.0 3.25 97.5 75-125 <br /> Beryllium 19.2 0.1 20.0 0.006 96.1 75-125 <br /> Cadmium 21.1 0.2 20.0 0.010 106 75-125 <br /> Chromium 20.8 0.2 20.0 0.207 103 75-125 <br /> Cobalt 19.4 1.0 20.0 0.043 96.9 75-125 <br /> Copper 19.4 0.4 20.0 0.944 92.3 75-125 <br /> Lead 18.5 0.2 20.0 0.060 92.1 75-125 <br /> Molybdenum 20.6 0.2 20.0 0.067 103 75-125 <br /> Nickel 18.9 0.2 20.0 0.135 93.8 75-125 <br /> Selenium 22.5 0.4 20.0 0.088 112 75-125 <br /> Silver 19.2 0.4 20.0 0.005 95.8 75-125 <br /> Thallium 20.7 0.4 20.0 ND 103 75-125 <br /> Vanadium 17.6 0.4 20.0 0.239 86.6 75-125 <br /> Zinc 21.7 0.4 20.0 2.01 98.4 75-125 <br /> Matrix Spike Dup(A\B0230-MSD1) Source:1802153-01 Prepared&Analyzed:02/22/18 <br /> Antimony 21.1 2.0 mg/L 20.0 0.024 105 75-125 1.18 25 <br /> Arsenic 22.0 0.2 20.0 0.095 110 75-125 1.13 25 <br /> Barium 23.6 0.4 20.0 3.25 102 75-125 3.58 25 <br /> Beryllium 19.3 0.1 20.0 0.006 96.5 75-125 0.415 25 <br /> Cadmium 20.9 0.2 20.0 0.010 105 75-125 0.904 25 <br /> Chromium 20.7 0.2 20.0 0.207 102 75-125 0.579 25 <br /> Cobalt 19.4 1.0 20.0 0.043 96.6 75-125 0.258 25 <br /> Copper 19.3 0.4 20.0 0.944 92.0 75-125 0.361 25 <br /> Lead 18.5 0.2 20.0 0.060 92.0 75-125 0.0541 25 <br /> Molybdenum 19.4 0.2 20.0 0.067 96.9 75-125 5.65 25 <br /> Nickel 19.0 0.2 20.0 0.135 94.2 75-125 0.475 25 <br /> Selenium 22.3 0.4 20.0 0.088 111 75-125 0.758 25 <br /> Silver 18.8 0.4 20.0 0.005 94.2 75-125 1.74 25 <br /> Thallium 14.3 0.4 20.0 ND 71.6 75-125 36.4 25 QM-11 <br /> Vanadium 34.3 0.4 20.0 0.239 170 75-125 64.6 25 QM-11 <br /> Zinc 21.9 0.4 20.0 2.01 99.4 75-125 0.918 25 <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 13 of 16 <br />