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Excelchem Environmental Labs <br /> DTE Stockton,LLC Project: Ash <br /> 2526 W.Washington St. Project Number: #4701180998 Date Reported: <br /> Stockton,CA 95203 Project Manager: Dan Crawford 06/07/18 16:27 <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 AW0029-EPA 6010B <br /> Blank(A\F0029-BLK1) Prepared&Analyzed:06/05/18 <br /> Antimony ND 1.0 mg/kg <br /> Arsenic ND 1.0 " <br /> Arsenic ND 1.0 " <br /> Barium ND 2.0 " <br /> Beryllium ND 0.5 <br /> Cadmium ND 1.0 <br /> Chromium ND 1.0 <br /> Cobalt ND 5.0 <br /> Copper ND 2.0 <br /> Lead ND 1.0 <br /> Molybdenum ND 1.0 <br /> Lead ND 1.0 <br /> Nickel ND 1.0 <br /> Selenium ND 2.0 <br /> Silver ND 1.0 <br /> Thallium ND 2.0 <br /> Vanadium ND 2.0 <br /> Zinc ND 2.0 <br /> LCS(A\F0029-BS1) Prepared&Analyzed:06/05/18 <br /> Antimony 102 1.0 mg/kg 100 102 80-120 <br /> Arsenic 101 1.0 100 101 80-120 <br /> Arsenic 101 1.0 100 101 80-120 <br /> Barium 99.9 2.0 100 99.9 80-120 <br /> Beryllium 98.0 0.5 100 98.0 80-120 <br /> Cadmium 98.9 1.0 100 98.9 80-120 <br /> Chromium 103 1.0 100 103 80-120 <br /> Cobalt 101 5.0 100 101 80-120 <br /> Copper 100 2.0 100 100 80-120 <br /> Lead 101 1.0 100 101 80-120 <br /> Molybdenum 104 1.0 100 104 80-120 <br /> Lead 101 1.0 100 101 80-120 <br /> Nickel 101 1.0 100 101 80-120 <br /> Selenium 97.0 2.0 100 97.0 80-120 <br /> Silver 94.8 1.0 100 94.8 80-120 <br /> Thallium 102 2.0 100 102 80-120 <br /> Vanadium 96.7 2.0 100 96.7 80-120 <br /> Zinc 101 2.0 100 101 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 5 of 14 <br />