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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 08/10/17 17:51 <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[H0104-EPA 6010B <br /> Matrix Spike(A[H0104-MS1) Source:1708063-01 Prepared&Analyzed:08/10/17 <br /> Antimony 20.1 2.0 mg/L 20.0 ND 100 75-125 <br /> Arsenic 21.4 0.2 20.0 0.067 107 75-125 <br /> Barium 20.0 0.4 20.0 0.030 100 75-125 <br /> Beryllium 22.2 0.1 20.0 ND 111 75-125 <br /> Cadmium 19.4 0.2 20.0 0.003 96.8 75-125 <br /> Chromium 20.2 0.2 20.0 0.025 101 75-125 <br /> Cobalt 19.4 1.0 20.0 ND 97.0 75-125 <br /> Copper 17.9 0.4 20.0 ND 89.6 75-125 <br /> Lead 18.7 0.2 20.0 0.012 93.3 75-125 <br /> Molybdenum 20.2 0.2 20.0 0.048 101 75-125 <br /> Nickel 19.6 0.2 20.0 0.054 97.6 75-125 <br /> Selenium 21.4 0.4 20.0 0.177 106 75-125 <br /> Silver 19.0 0.4 20.0 0.009 94.8 75-125 <br /> Thallium 17.5 0.4 20.0 ND 87.6 75-125 <br /> Vanadium 19.2 0.4 20.0 0.036 95.7 75-125 <br /> Zinc 20.2 0.4 20.0 0.015 101 75-125 <br /> Matrix Spike Dup(A[H0104-MSD1) Source:1708063-01 Prepared&Analyzed:08/10/17 <br /> Antimony 20.3 2.0 mg/L 20.0 ND 101 75-125 1.14 25 <br /> Arsenic 21.6 0.2 20.0 0.067 108 75-125 0.791 25 <br /> Barium 19.0 0.4 20.0 0.030 94.9 75-125 5.38 25 <br /> Beryllium 22.3 0.1 20.0 ND 111 75-125 0.360 25 <br /> Cadmium 19.5 0.2 20.0 0.003 97.7 75-125 0.874 25 <br /> Chromium 20.3 0.2 20.0 0.025 101 75-125 0.493 25 <br /> Cobalt 19.5 1.0 20.0 ND 97.6 75-125 0.617 25 <br /> Copper 18.0 0.4 20.0 ND 90.0 75-125 0.390 25 <br /> Lead 18.7 0.2 20.0 0.012 93.6 75-125 0.374 25 <br /> Molybdenum 20.4 0.2 20.0 0.048 102 75-125 1.18 25 <br /> Nickel 19.7 0.2 20.0 0.054 98.3 75-125 0.662 25 <br /> Selenium 21.8 0.4 20.0 0.177 108 75-125 1.62 25 <br /> Silver 17.9 0.4 20.0 0.009 89.3 75-125 5.98 25 <br /> Thallium 17.6 0.4 20.0 ND 88.1 75-125 0.512 25 <br /> Vanadium 19.0 0.4 20.0 0.036 95.0 75-125 0.733 25 <br /> Zinc 20.2 0.4 20.0 0.015 101 75-125 0.0495 25 <br /> EXcelchern 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 />