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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 11/13/17 17:56 <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[K0086-EPA 6010B <br /> Matrix Spike(A[K0086-MS1) Source:1711051-01 Prepared&Analyzed: 11/13/17 <br /> Antimony 22.1 2.0 mg/L 20.0 0.117 110 75-125 <br /> Arsenic 24.2 0.2 20.0 1.13 115 75-125 <br /> Barium 23.5 0.4 20.0 1.34 111 75-125 <br /> Beryllium 21.5 0.1 20.0 0.003 108 75-125 <br /> Cadmium 21.4 0.2 20.0 0.054 107 75-125 <br /> Chromium 21.7 0.2 20.0 0.713 105 75-125 <br /> Cobalt 20.6 1.0 20.0 0.081 103 75-125 <br /> Copper 25.5 0.4 20.0 5.60 99.6 75-125 <br /> Lead 20.5 0.2 20.0 0.348 101 75-125 <br /> Molybdenum 21.6 0.2 20.0 0.226 107 75-125 <br /> Nickel 20.4 0.2 20.0 0.319 101 75-125 <br /> Selenium 22.6 0.4 20.0 0.072 113 75-125 <br /> Silver 21.1 0.4 20.0 0.026 105 75-125 <br /> Thallium 19.0 0.4 20.0 ND 94.8 75-125 <br /> Vanadium 21.2 0.4 20.0 0.326 105 75-125 <br /> Zinc 25.9 0.4 20.0 4.33 108 75-125 <br /> Matrix Spike Dup(A[K0086-MSD1) Source:1711051-01 Prepared&Analyzed: 11/13/17 <br /> Antimony 22.1 2.0 m9/1- 20.0 0.117 110 75-125 0.0452 25 <br /> Arsenic 24.3 0.2 20.0 1.13 116 75-125 0.330 25 <br /> Barium 23.3 0.4 20.0 1.34 110 75-125 0.726 25 <br /> Beryllium 21.4 0.1 20.0 0.003 107 75-125 0.606 25 <br /> Cadmium 21.4 0.2 20.0 0.054 107 75-125 0.0466 25 <br /> Chromium 21.8 0.2 20.0 0.713 105 75-125 0.321 25 <br /> Cobalt 20.7 1.0 20.0 0.081 103 75-125 0.194 25 <br /> Copper 25.2 0.4 20.0 5.60 98.2 75-125 1.10 25 <br /> Lead 20.6 0.2 20.0 0.348 101 75-125 0.437 25 <br /> Molybdenum 21.7 0.2 20.0 0.226 107 75-125 0.648 25 <br /> Nickel 20.5 0.2 20.0 0.319 101 75-125 0.244 25 <br /> Selenium 22.5 0.4 20.0 0.072 112 75-125 0.531 25 <br /> Silver 20.8 0.4 20.0 0.026 104 75-125 1.58 25 <br /> Thallium 18.9 0.4 20.0 ND 94.7 75-125 0.0528 25 <br /> Vanadium 21.0 0.4 20.0 0.326 103 75-125 1.09 25 <br /> Zinc 25.9 0.4 20.0 4.33 108 75-125 0.154 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 12 of 15 <br />