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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 05/17/18 18:09 <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\E0144-EPA 6010B <br /> Blank(A\E0144-BLK1) Prepared&Analyzed:05/17/18 <br /> Antimony ND 2.0 mg/L <br /> Arsenic ND 0.2 " <br /> Barium ND 0.4 " <br /> Beryllium ND 0.1 " <br /> Cadmium ND 0.2 <br /> Chromium ND 0.2 <br /> Cobalt ND 1.0 <br /> Copper ND 0.4 <br /> Lead ND 0.2 <br /> Molybdenum ND 0.2 <br /> Nickel ND 0.2 <br /> Selenium ND 0.4 <br /> Silver ND 0.4 <br /> Thallium ND 0.4 <br /> Vanadium ND 0.4 <br /> Zinc ND 0.4 <br /> LCS(A\E0144-BS1) Prepared&Analyzed:05/17/18 <br /> Antimony 20.3 2.0 mg/L 20.0 102 80-120 <br /> Arsenic 19.6 0.2 20.0 98.2 80-120 <br /> Barium 19.5 0.4 20.0 97.6 80-120 <br /> Beryllium 19.9 0.1 20.0 99.6 80-120 <br /> Cadmium 19.8 0.2 20.0 98.9 80-120 <br /> Chromium 19.6 0.2 20.0 98.1 80-120 <br /> Cobalt 19.8 1.0 20.0 99.2 80-120 <br /> Copper 19.3 0.4 20.0 96.6 80-120 <br /> Lead 19.8 0.2 20.0 99.2 80-120 <br /> Molybdenum 20.0 0.2 20.0 100 80-120 <br /> Nickel 19.9 0.2 20.0 99.6 80-120 <br /> Selenium 19.8 0.4 20.0 98.8 80-120 <br /> Silver 19.2 0.4 20.0 96.0 80-120 <br /> Thallium 20.1 0.4 20.0 101 80-120 <br /> Vanadium 19.5 0.4 20.0 97.6 80-120 <br /> Zinc 19.6 0.4 20.0 98.0 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 10 of 16 <br />