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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 05/18/18 18:03 <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\E0151-EPA 6010B <br /> Matrix Spike Dup(A\E0151-MSD1) Source:1805107-01 Prepared&Analyzed:05/18/18 <br /> Antimony 20.8 2.0 mg/L 20.0 0.102 103 75-125 1.11 25 <br /> Arsenic 21.9 0.2 20.0 0.845 105 75-125 1.29 25 <br /> Barium 24.7 0.4 20.0 4.13 103 75-125 0.447 25 <br /> Beryllium 19.4 0.1 20.0 0.004 96.9 75-125 1.25 25 <br /> Cadmium 20.1 0.2 20.0 0.056 100 75-125 0.901 25 <br /> Chromium 20.1 0.2 20.0 0.421 98.4 75-125 0.799 25 <br /> Cobalt 18.8 1.0 20.0 0.067 93.9 75-125 0.799 25 <br /> Copper 20.8 0.4 20.0 2.21 93.0 75-125 0.0480 25 <br /> Lead 19.0 0.2 20.0 0.665 91.7 75-125 0.580 25 <br /> Molybdenum 20.2 0.2 20.0 0.148 100 75-125 0.795 25 <br /> Nickel 18.8 0.2 20.0 0.267 92.5 75-125 0.695 25 <br /> Selenium 21.1 0.4 20.0 0.014 105 75-125 1.58 25 <br /> Silver 18.6 0.4 20.0 ND 92.8 75-125 0.215 25 <br /> Thallium 17.6 0.4 20.0 ND 87.9 75-125 1.03 25 <br /> Vanadium 18.4 0.4 20.0 0.242 90.5 75-125 0.656 25 <br /> Zinc 25.7 0.4 20.0 6.17 97.8 75-125 0.156 25 <br /> Batch A\E0154-EPA 7470A <br /> Blank(A\E0154-BLKI) Prepared&Analyzed:05/18/18 <br /> Mercury ND 0.000200 mg/L <br /> LCS(A\E0154-BS1) Prepared&Analyzed:05/18/18 <br /> Mercury 0.0317 0.000200 mg/L 0.0400 79.2 75-120 <br /> LCS Dup(A\E0154-BSD1) Prepared&Analyzed:05/18/18 <br /> Mercury 0.0304 0.000200 mg/L 0.0400 76.0 75-120 4.12 20 <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 16 <br />