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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 02/21/18 17:33 <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\B0223-EPA 6010B <br /> Matrix Spike(A\B0223-MS1) Source:1802144-01 Prepared&Analyzed:02/21/18 <br /> Antimony 21.5 2.0 mg/L 20.0 0.003 107 75-125 <br /> Arsenic 22.3 0.2 20.0 0.099 111 75-125 <br /> Barium 27.1 0.4 20.0 6.99 101 75-125 <br /> Beryllium 19.6 0.1 20.0 0.005 98.1 75-125 <br /> Cadmium 21.0 0.2 20.0 0.009 105 75-125 <br /> Chromium 20.5 0.2 20.0 0.336 101 75-125 <br /> Cobalt 19.4 1.0 20.0 0.108 96.3 75-125 <br /> Copper 21.8 0.4 20.0 3.44 91.9 75-125 <br /> Lead 18.8 0.2 20.0 0.328 92.4 75-125 <br /> Molybdenum 20.7 0.2 20.0 0.076 103 75-125 <br /> Nickel 19.3 0.2 20.0 0.357 94.6 75-125 <br /> Selenium 22.0 0.4 20.0 0.040 110 75-125 <br /> Silver 18.6 0.4 20.0 ND 92.8 75-125 <br /> Thallium 16.9 0.4 20.0 ND 84.5 75-125 <br /> Vanadium 18.4 0.4 20.0 0.552 89.3 75-125 <br /> Zinc 21.3 0.4 20.0 1.67 98.2 75-125 <br /> Matrix Spike Dup(A\B0223-MSD1) Source:1802144-01 Prepared&Analyzed:02/21/18 <br /> Antimony 21.4 2.0 mg/L 20.0 0.003 107 75-125 0.187 25 <br /> Arsenic 22.2 0.2 20.0 0.099 110 75-125 0.450 25 <br /> Barium 27.1 0.4 20.0 6.99 101 75-125 0.0369 25 <br /> Beryllium 19.6 0.1 20.0 0.005 97.8 75-125 0.357 25 <br /> Cadmium 21.0 0.2 20.0 0.009 105 75-125 0.143 25 <br /> Chromium 20.5 0.2 20.0 0.336 101 75-125 0.0488 25 <br /> Cobalt 19.3 1.0 20.0 0.108 96.1 75-125 0.207 25 <br /> Copper 21.7 0.4 20.0 3.44 91.5 75-125 0.413 25 <br /> Lead 18.8 0.2 20.0 0.328 92.1 75-125 0.319 25 <br /> Molybdenum 20.7 0.2 20.0 0.076 103 75-125 0.0483 25 <br /> Nickel 19.2 0.2 20.0 0.357 94.2 75-125 0.416 25 <br /> Selenium 21.9 0.4 20.0 0.040 109 75-125 0.182 25 <br /> Silver 18.6 0.4 20.0 ND 93.2 75-125 0.430 25 <br /> Thallium 16.6 0.4 20.0 ND 83.2 75-125 1.49 25 <br /> Vanadium 18.2 0.4 20.0 0.552 88.3 75-125 1.04 25 <br /> Zinc 21.3 0.4 20.0 1.67 98.0 75-125 0.235 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 />