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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 /> LCS Dup(A[K0119-BSD1) Prepared&Analyzed: 11/15/17 <br /> Antimony 18.8 2.0 mg/L 20.0 93.8 80-120 1.56 25 <br /> Arsenic 19.9 0.2 20.0 99.6 80-120 0.0502 25 <br /> Barium 20.1 0.4 20.0 101 80-120 0.149 25 <br /> Beryllium 19.3 0.1 20.0 96.5 80-120 0.568 25 <br /> Cadmium 20.4 0.2 20.0 102 80-120 0.244 25 <br /> Chromium 19.0 0.2 20.0 94.8 80-120 0.316 25 <br /> Cobalt 19.8 1.0 20.0 99.0 80-120 0.202 25 <br /> Copper 19.7 0.4 20.0 98.6 80-120 0.354 25 <br /> Lead 19.9 0.2 20.0 99.4 80-120 0.301 25 <br /> Molybdenum 18.3 0.2 20.0 91.7 80-120 0.821 25 <br /> Nickel 19.9 0.2 20.0 99.6 80-120 0.100 25 <br /> Selenium 22.2 0.4 20.0 111 80-120 0.0450 25 <br /> Silver 17.9 0.4 20.0 89.6 80-120 9.16 25 <br /> Thallium 20.1 0.4 20.0 101 80-120 0.199 25 <br /> Vanadium 19.6 0.4 20.0 97.8 80-120 0.357 25 <br /> Zinc 20.6 0.4 20.0 103 80-120 0.0485 25 <br /> Matrix Spike(A[K0119-MS1) Source:1711059-01 Prepared&Analyzed: 11/15/17 <br /> Antimony 20.4 2.0 mg/L 20.0 0.031 102 75-125 <br /> Arsenic 21.6 0.2 20.0 0.040 108 75-125 <br /> Barium 24.5 0.4 20.0 4.69 98.9 75-125 <br /> Beryllium 20.0 0.1 20.0 0.005 100 75-125 <br /> Cadmium 19.7 0.2 20.0 0.003 98.7 75-125 <br /> Chromium 19.7 0.2 20.0 0.013 98.5 75-125 <br /> Cobalt 19.6 1.0 20.0 0.394 96.0 75-125 <br /> Copper 18.6 0.4 20.0 0.103 92.7 75-125 <br /> Lead 19.0 0.2 20.0 0.044 94.9 75-125 <br /> Molybdenum 20.0 0.2 20.0 0.070 99.9 75-125 <br /> Nickel 19.4 0.2 20.0 0.325 95.6 75-125 <br /> Selenium 21.9 0.4 20.0 0.068 109 75-125 <br /> Silver 14.6 0.4 20.0 0.009 73.2 75-125 QM-01 <br /> Thallium 17.9 0.4 20.0 ND 89.4 75-125 <br /> Vanadium 20.1 0.4 20.0 0.232 99.3 75-125 <br /> Zinc 20.5 0.4 20.0 0.183 101 75-125 <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 17 <br />