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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 /> LCS Dup(A\E0151-BSD1) Prepared&Analyzed:05/18/18 <br /> Antimony 19.7 2.0 mg/L 20.0 98.5 80-120 0.809 25 <br /> Arsenic 19.2 0.2 20.0 95.8 80-120 0.520 25 <br /> Barium 19.9 0.4 20.0 99.4 80-120 3.64 25 <br /> Beryllium 19.1 0.1 20.0 95.5 80-120 1.25 25 <br /> Cadmium 19.1 0.2 20.0 95.7 80-120 0.936 25 <br /> Chromium 19.4 0.2 20.0 96.9 80-120 0.976 25 <br /> Cobalt 19.2 1.0 20.0 96.0 80-120 0.934 25 <br /> Copper 18.7 0.4 20.0 93.6 80-120 1.27 25 <br /> Lead 19.1 0.2 20.0 95.7 80-120 0.988 25 <br /> Molybdenum 19.4 0.2 20.0 96.8 80-120 0.567 25 <br /> Nickel 19.2 0.2 20.0 96.0 80-120 0.933 25 <br /> Selenium 19.3 0.4 20.0 96.6 80-120 0.671 25 <br /> Silver 19.1 0.4 20.0 95.3 80-120 2.87 25 <br /> Thallium 19.3 0.4 20.0 96.7 80-120 0.926 25 <br /> Vanadium 18.3 0.4 20.0 91.4 80-120 2.16 25 <br /> Zinc 19.0 0.4 20.0 95.0 80-120 0.838 25 <br /> Matrix Spike(A\E0151-MS1) Source:1805107-01 Prepared&Analyzed:05/18/18 <br /> Antimony 20.5 2.0 mg/L 20.0 0.102 102 75-125 <br /> Arsenic 21.6 0.2 20.0 0.845 104 75-125 <br /> Barium 24.6 0.4 20.0 4.13 102 75-125 <br /> Beryllium 19.2 0.1 20.0 0.004 95.7 75-125 <br /> Cadmium 19.9 0.2 20.0 0.056 99.1 75-125 <br /> Chromium 19.9 0.2 20.0 0.421 97.6 75-125 <br /> Cobalt 18.7 1.0 20.0 0.067 93.1 75-125 <br /> Copper 20.8 0.4 20.0 2.21 93.0 75-125 <br /> Lead 18.9 0.2 20.0 0.665 91.2 75-125 <br /> Molybdenum 20.0 0.2 20.0 0.148 99.5 75-125 <br /> Nickel 18.6 0.2 20.0 0.267 91.8 75-125 <br /> Selenium 20.8 0.4 20.0 0.014 104 75-125 <br /> Silver 18.6 0.4 20.0 ND 93.0 75-125 <br /> Thallium 17.4 0.4 20.0 ND 87.0 75-125 <br /> Vanadium 18.2 0.4 20.0 0.242 89.9 75-125 <br /> Zinc 25.7 0.4 20.0 6.17 97.6 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 II of 16 <br />