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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 11/10/17 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[K0076-EPA 6010B <br /> Matrix Spike Dup(A[K0076-MSD1) Source:1711042-01 Prepared&Analyzed: 11/10/17 <br /> Antimony 20.4 2.0 mg/L 20.0 0.161 101 75-125 0.788 25 <br /> Arsenic 22.9 0.2 20.0 2.03 104 75-125 0.832 25 <br /> Barium 21.1 0.4 20.0 1.49 98.1 75-125 1.05 25 <br /> Beryllium 19.2 0.1 20.0 0.003 96.1 75-125 1.19 25 <br /> Cadmium 19.8 0.2 20.0 0.041 98.6 75-125 0.457 25 <br /> Chromium 19.7 0.2 20.0 0.607 95.6 75-125 0.203 25 <br /> Cobalt 19.1 1.0 20.0 0.054 95.1 75-125 0.00 25 <br /> Copper 19.2 0.4 20.0 1.82 86.9 75-125 1.81 25 <br /> Lead 18.6 0.2 20.0 0.066 92.5 75-125 0.0539 25 <br /> Molybdenum 19.7 0.2 20.0 0.158 97.6 75-125 0.612 25 <br /> Nickel 18.7 0.2 20.0 0.263 92.0 75-125 0.0536 25 <br /> Selenium 20.3 0.4 20.0 0.006 101 75-125 1.59 25 <br /> Silver 18.4 0.4 20.0 0.003 92.1 75-125 0.163 25 <br /> Thallium 17.7 0.4 20.0 ND 88.4 75-125 0.624 25 <br /> Vanadium 18.3 0.4 20.0 0.153 90.8 75-125 2.00 25 <br /> Zinc 30.7 0.4 20.0 10.9 99.1 75-125 0.00 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 />