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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 /> 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 A\E0127-EPA 6010B <br /> LCS(A\E0127-BS1) Prepared:05/15/18 Analyzed:05/16/18 <br /> Antimony 99.4 1.0 mg/kg 100 99.4 80-120 <br /> Arsenic 96.6 1.0 100 96.6 80-120 <br /> Arsenic 96.6 1.0 100 96.6 80-120 <br /> Barium 99.0 2.0 100 99.0 80-120 <br /> Beryllium 99.3 0.5 100 99.3 80-120 <br /> Cadmium 98.0 1.0 100 98.0 80-120 <br /> Chromium 100 1.0 100 100 80-120 <br /> Cobalt 100 5.0 100 100 80-120 <br /> Copper 106 2.0 100 106 80-120 <br /> Lead 101 1.0 100 101 80-120 <br /> Molybdenum 100 1.0 100 100 80-120 <br /> Lead 101 1.0 100 101 80-120 <br /> Nickel 99.9 1.0 100 99.9 80-120 <br /> Selenium 93.3 2.0 100 93.3 80-120 <br /> Silver 103 1.0 100 103 80-120 <br /> Thallium 100 2.0 100 100 80-120 <br /> Vanadium 107 2.0 100 107 80-120 <br /> Zinc 99.5 2.0 100 99.5 80-120 <br /> LCS Dup(A\E0127-BSD1) Prepared:05/15/18 Analyzed:05/16/18 <br /> Antimony 101 1.0 mg/kg 100 101 80-120 1.43 25 <br /> Arsenic 97.9 1.0 100 97.9 80-120 1.33 25 <br /> Arsenic 97.9 1.0 100 97.9 80-120 1.33 25 <br /> Barium 100 2.0 100 100 80-120 1.17 25 <br /> Beryllium 100 0.5 100 100 80-120 0.882 25 <br /> Cadmium 99.1 1.0 100 99.1 80-120 1.12 25 <br /> Chromium 101 1.0 100 101 80-120 0.497 25 <br /> Cobalt 101 5.0 100 101 80-120 0.696 25 <br /> Copper 106 2.0 100 106 80-120 0.471 25 <br /> Lead 102 1.0 100 102 80-120 1.09 25 <br /> Molybdenum 100 1.0 100 100 80-120 0.399 25 <br /> Lead 102 1.0 100 102 80-120 1.09 25 <br /> Nickel 101 1.0 100 101 80-120 0.668 25 <br /> Selenium 95.1 2.0 100 95.1 80-120 1.90 25 <br /> Silver 104 1.0 100 104 80-120 0.962 25 <br /> Thallium 102 2.0 100 102 80-120 1.58 25 <br /> Vanadium 107 2.0 100 107 80-120 0.0934 25 <br /> Zinc 101 2.0 100 101 80-120 1.57 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 8 of 16 <br />