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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 08/14/17 17:46 <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[H0138-EPA 6010B <br /> Matrix Spike(A[H0138-MS1) Source: 1708081-02 Prepared&Analyzed:08/14/17 <br /> Antimony 21.1 2.0 mg/L 20.0 0.054 105 75-125 <br /> Arsenic 22.6 0.2 20.0 0.190 112 75-125 <br /> Barium 22.7 0.4 20.0 2.17 103 75-125 <br /> Beryllium 21.5 0.1 20.0 0.002 108 75-125 <br /> Cadmium 20.5 0.2 20.0 0.010 103 75-125 <br /> Chromium 21.2 0.2 20.0 0.380 104 75-125 <br /> Cobalt 19.6 1.0 20.0 0.010 98.0 75-125 <br /> Copper 20.5 0.4 20.0 1.59 94.5 75-125 <br /> Lead 19.0 0.2 20.0 0.006 95.2 75-125 <br /> Molybdenum 21.3 0.2 20.0 0.069 106 75-125 <br /> Nickel 18.9 0.2 20.0 0.075 94.0 75-125 <br /> Selenium 22.1 0.4 20.0 0.106 110 75-125 <br /> Silver 19.3 0.4 20.0 ND 96.4 75-125 <br /> Thallium 18.1 0.4 20.0 ND 90.5 75-125 <br /> Vanadium 20.0 0.4 20.0 0.201 99.0 75-125 <br /> Zinc 20.1 0.4 20.0 0.101 99.8 75-125 <br /> Matrix Spike Dup(A[H0138-MSD1) Source:1708081-02 Prepared&Analyzed:08/14/17 <br /> Antimony 20.9 2.0 mg/L 20.0 0.054 104 75-125 0.714 25 <br /> Arsenic 22.4 0.2 20.0 0.190 111 75-125 0.843 25 <br /> Barium 22.5 0.4 20.0 2.17 102 75-125 0.619 25 <br /> Beryllium 21.3 0.1 20.0 0.002 107 75-125 0.981 25 <br /> Cadmium 20.4 0.2 20.0 0.010 102 75-125 0.733 25 <br /> Chromium 21.0 0.2 20.0 0.380 103 75-125 0.711 25 <br /> Cobalt 19.5 1.0 20.0 0.010 97.6 75-125 0.409 25 <br /> Copper 20.3 0.4 20.0 1.59 93.3 75-125 1.13 25 <br /> Lead 19.0 0.2 20.0 0.006 94.9 75-125 0.315 25 <br /> Molybdenum 21.2 0.2 20.0 0.069 105 75-125 0.660 25 <br /> Nickel 18.8 0.2 20.0 0.075 93.5 75-125 0.531 25 <br /> Selenium 21.9 0.4 20.0 0.106 109 75-125 0.909 25 <br /> Silver 19.1 0.4 20.0 ND 95.6 75-125 0.781 25 <br /> Thallium 18.0 0.4 20.0 ND 90.2 75-125 0.332 25 <br /> Vanadium 19.8 0.4 20.0 0.201 97.9 75-125 1.06 25 <br /> Zinc 20.0 0.4 20.0 0.101 99.3 75-125 0.450 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 />