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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 /> Total Recoverable Metals-Quality Control <br /> Reporting Spike Source %REC RPD <br /> Analyte Result Limit Units Level Result %REC Limits RPD Limit Notes <br /> Batch A[K0061-EPA 6010B <br /> Matrix Spike Dup(A[K0061-MSD1) Source:1711018-21 Prepared: 11/08/17 Analyzed: 11/09/17 <br /> Antimony 90.7 1.0 mg/kg 100 0.554 90.1 75-125 0.908 25 <br /> Arsenic 95.6 1.0 100 ND 95.6 75-125 2.52 25 <br /> Arsenic 95.6 1.0 100 ND 95.6 75-125 2.52 25 <br /> Barium 103 2.0 100 12.8 89.8 75-125 0.680 25 <br /> Beryllium 95.7 0.5 100 0.016 95.7 75-125 1.14 25 <br /> Cadmium 97.3 1.0 100 ND 97.3 75-125 0.420 25 <br /> Chromium 97.3 1.0 100 5.26 92.0 75-125 4.46 25 <br /> Cobalt 95.9 5.0 100 0.667 95.2 75-125 0.817 25 <br /> Copper 105 2.0 100 3.48 101 75-125 8.51 25 <br /> Lead 93.1 1.0 100 0.900 92.2 75-125 0.0430 25 <br /> Molybdenum 89.7 1.0 100 0.388 89.3 75-125 2.15 25 <br /> Nickel 97.9 1.0 100 2.32 95.6 75-125 5.94 25 <br /> Lead 93.1 1.0 100 0.900 92.2 75-125 0.0430 25 <br /> Selenium 97.4 2.0 100 ND 97.4 75-125 2.03 25 <br /> Silver 96.9 1.0 100 ND 96.9 75-125 0.638 25 <br /> Thallium 94.7 2.0 100 ND 94.7 75-125 1.65 25 <br /> Vanadium 93.8 2.0 100 1.97 91.8 75-125 1.18 25 <br /> Zinc 109 2.0 100 17.1 91.6 75-125 2.61 25 <br /> Batch AIK0064-EPA 7471A <br /> Blank(A[K0064-BLK1) Prepared&Analyzed: 11/09/17 <br /> Mercury ND 0.016 mg/kg <br /> LCS(AIK0064-BS1) Prepared&Analyzed: 11/09/17 <br /> Mercury 0.187 0.016 mg/kg 0.200 93.6 80-120 <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 9 of 16 <br />