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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 06/13/18 16:19 <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 AW0067-EPA 6010B <br /> LCS(A\F0067-BS1) Prepared:06/08/18 Analyzed:06/11/18 <br /> Antimony 102 1.0 mg/kg 100 102 80-120 <br /> Arsenic 97.1 1.0 100 97.1 80-120 <br /> Arsenic 97.1 1.0 100 97.1 80-120 <br /> Barium 103 2.0 100 103 80-120 <br /> Beryllium 99.5 0.5 100 99.5 80-120 <br /> Cadmium 99.9 1.0 100 99.9 80-120 <br /> Chromium 102 1.0 100 102 80-120 <br /> Cobalt 104 5.0 100 104 80-120 <br /> Copper 101 2.0 100 101 80-120 <br /> Lead 102 1.0 100 102 80-120 <br /> Molybdenum 103 1.0 100 103 80-120 <br /> Lead 102 1.0 100 102 80-120 <br /> Nickel 101 1.0 100 101 80-120 <br /> Selenium 95.9 2.0 100 95.9 80-120 <br /> Silver 65.4 1.0 100 65.4 80-120 QR-04 <br /> Thallium 99.5 2.0 100 99.5 80-120 <br /> Vanadium 101 2.0 100 101 80-120 <br /> Zinc 99.9 2.0 100 99.9 80-120 <br /> LCS Dup(A\F0067-BSD1) Prepared:06/08/18 Analyzed:06/11/18 <br /> Antimony 99.9 1.0 mg/kg 100 99.9 80-120 2.14 25 <br /> Arsenic 95.7 1.0 100 95.7 80-120 1.51 25 <br /> Arsenic 95.7 1.0 100 95.7 80-120 1.51 25 <br /> Barium 101 2.0 100 101 80-120 1.47 25 <br /> Beryllium 99.2 0.5 100 99.2 80-120 0.322 25 <br /> Cadmium 98.1 1.0 100 98.1 80-120 1.77 25 <br /> Chromium 101 1.0 100 101 80-120 1.18 25 <br /> Cobalt 102 5.0 100 102 80-120 1.36 25 <br /> Copper 103 2.0 100 103 80-120 1.47 25 <br /> Lead 101 1.0 100 101 80-120 1.28 25 <br /> Molybdenum 102 1.0 100 102 80-120 0.979 25 <br /> Nickel 99.9 1.0 100 99.9 80-120 1.43 25 <br /> Lead 101 1.0 100 101 80-120 1.28 25 <br /> Selenium 93.9 2.0 100 93.9 80-120 2.10 25 <br /> Silver 102 1.0 100 102 80-120 43.6 25 Z-01 <br /> Thallium 98.3 2.0 100 98.3 80-120 1.18 25 <br /> Vanadium 103 2.0 100 103 80-120 1.96 25 <br /> Zinc 98.9 2.0 100 98.9 80-120 0.976 25 <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 6 of 13 <br />