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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 11/15/17 17:57 <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[K0119-EPA 6010B <br /> Matrix Spike Dup(A[K0119-MSD1) Source:1711059-01 Prepared&Analyzed: 11/15/17 <br /> Antimony 20.1 2.0 mg/L 20.0 0.031 101 75-125 1.43 25 <br /> Arsenic 21.2 0.2 20.0 0.040 106 75-125 2.01 25 <br /> Barium 24.8 0.4 20.0 4.69 100 75-125 1.18 25 <br /> Beryllium 19.8 0.1 20.0 0.005 99.0 75-125 1.15 25 <br /> Cadmium 19.4 0.2 20.0 0.003 96.9 75-125 1.84 25 <br /> Chromium 19.4 0.2 20.0 0.013 96.8 75-125 1.69 25 <br /> Cobalt 19.2 1.0 20.0 0.394 94.2 75-125 1.85 25 <br /> Copper 18.5 0.4 20.0 0.103 92.1 75-125 0.646 25 <br /> Lead 18.7 0.2 20.0 0.044 93.3 75-125 1.75 25 <br /> Molybdenum 19.8 0.2 20.0 0.070 98.4 75-125 1.46 25 <br /> Nickel 19.1 0.2 20.0 0.325 94.0 75-125 1.66 25 <br /> Selenium 21.5 0.4 20.0 0.068 107 75-125 1.66 25 <br /> Silver 12.1 0.4 20.0 0.009 60.3 75-125 19.3 25 QM-01 <br /> Thallium 17.6 0.4 20.0 ND 88.0 75-125 1.52 25 <br /> Vanadium 19.9 0.4 20.0 0.232 98.4 75-125 0.900 25 <br /> Zinc 20.1 0.4 20.0 0.183 99.4 75-125 2.02 25 <br /> Batch A[K0121-EPA 7470A <br /> Blank(A[K0121-BLK1) Prepared&Analyzed: 11/15/17 <br /> Mercury ND 0.000200 mg/L <br /> LCS(A[K0121-BS1) Prepared&Analyzed: 11/15/17 <br /> Mercury 0.00289 0.000200 mg/L 0.00333 86.8 75-120 <br /> LCS Dup(A[K0121-BSD1) Prepared&Analyzed: 11/15/17 <br /> Mercury 0.00316 0.000200 mg/L 0.00333 94.8 75-120 8.81 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 13 of 17 <br />