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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 05/24/18 11:08 <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\E0209-EPA 6010B <br /> Matrix Spike(A\E0209-MS1) Source:1805138-01 Prepared&Analyzed:05/23/18 <br /> Antimony 20.7 2.0 mg/L 20.0 0.256 102 75-125 <br /> Arsenic 23.3 0.2 20.0 2.49 104 75-125 <br /> Barium 26.3 0.4 20.0 6.78 97.4 75-125 <br /> Beryllium 19.2 0.1 20.0 0.005 96.2 75-125 <br /> Cadmium 20.2 0.2 20.0 0.133 100 75-125 <br /> Chromium 20.1 0.2 20.0 0.957 95.6 75-125 <br /> Cobalt 18.9 1.0 20.0 0.189 93.5 75-125 <br /> Copper 23.8 0.4 20.0 5.25 92.6 75-125 <br /> Lead 18.8 0.2 20.0 0.384 91.9 75-125 <br /> Molybdenum 20.4 0.2 20.0 0.275 100 75-125 <br /> Nickel 19.3 0.2 20.0 0.718 92.9 75-125 <br /> Selenium 20.8 0.4 20.0 0.106 103 75-125 <br /> Silver 18.9 0.4 20.0 0.006 94.3 75-125 <br /> Thallium 17.5 0.4 20.0 ND 87.6 75-125 <br /> Vanadium 18.5 0.4 20.0 0.535 90.0 75-125 <br /> Zinc 39.6 0.4 20.0 20.2 97.1 75-125 <br /> Matrix Spike Dup(A\E0209-MSD1) Source:1805138-01 Prepared&Analyzed:05/23/18 <br /> Antimony 20.7 2.0 mg/L 20.0 0.256 102 75-125 0.145 25 <br /> Arsenic 22.8 0.2 20.0 2.49 102 75-125 2.12 25 <br /> Barium 24.8 0.4 20.0 6.78 90.0 75-125 5.76 25 <br /> Beryllium 19.4 0.1 20.0 0.005 97.1 75-125 0.983 25 <br /> Cadmium 20.2 0.2 20.0 0.133 100 75-125 0.198 25 <br /> Chromium 20.1 0.2 20.0 0.957 95.5 75-125 0.0498 25 <br /> Cobalt 19.1 1.0 20.0 0.189 94.4 75-125 0.949 25 <br /> Copper 23.3 0.4 20.0 5.25 90.1 75-125 2.13 25 <br /> Lead 19.0 0.2 20.0 0.384 93.2 75-125 1.38 25 <br /> Molybdenum 20.5 0.2 20.0 0.275 101 75-125 0.637 25 <br /> Nickel 19.5 0.2 20.0 0.718 93.8 75-125 0.928 25 <br /> Selenium 20.7 0.4 20.0 0.106 103 75-125 0.0964 25 <br /> Silver 19.0 0.4 20.0 0.006 94.8 75-125 0.529 25 <br /> Thallium 18.0 0.4 20.0 ND 90.0 75-125 2.65 25 <br /> Vanadium 19.0 0.4 20.0 0.535 92.2 75-125 2.35 25 <br /> Zinc 36.6 0.4 20.0 20.2 81.6 75-125 8.14 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 />