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Excelchem Laboratories,Inc. <br /> DTE Stockton,LLC Project: 2019 Annual Fly Ash Profiling <br /> 2526 W.Washington St. Project Number: 4701254256 Date Reported: <br /> Stockton,CA 95203 Project Manager: Genny Huffinan 04/12/19 16:21 <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 AID0097-EPA 6010B <br /> LCS(A]D0097-BS1) Prepared&Analyzed:04/10/19 <br /> Antimony 106 0.5 mg/kg 100 106 80-120 <br /> Arsenic 103 0.5 100 103 80-120 <br /> Arsenic 103 1.0 100 103 80-120 <br /> Barium 102 0.5 100 102 80-120 <br /> Beryllium 101 0.5 100 101 80-120 <br /> Cadmium 104 0.5 100 104 80-120 <br /> Chromium 99.3 0.5 100 99.3 80-120 <br /> Cobalt 99.7 0.5 100 99.7 80-120 <br /> Copper 109 0.5 100 109 80-120 <br /> Lead 102 0.5 100 102 80-120 <br /> Molybdenum 99.5 0.5 100 99.5 80-120 <br /> Lead 102 1.0 100 102 80-120 <br /> Nickel 101 0.5 100 101 80-120 <br /> Selenium 112 0.5 100 112 80-120 <br /> Silver 102 0.5 100 102 80-120 <br /> Thallium 106 0.5 100 106 80-120 <br /> Vanadium 97.3 0.5 100 97.3 80-120 <br /> Zinc 100 0.5 100 100 80-120 <br /> LCS Dup(A]D0097-BSD1) Prepared&Analyzed:04/10/19 <br /> Antimony 106 0.5 mg/kg 100 106 80-120 0.283 25 <br /> Arsenic 102 1.0 100 102 80-120 0.585 25 <br /> Arsenic 102 0.5 100 102 80-120 0.585 25 <br /> Barium 101 0.5 100 101 80-120 1.18 25 <br /> Beryllium 101 0.5 100 101 80-120 0.198 25 <br /> Cadmium 102 0.5 100 102 80-120 1.55 25 <br /> Chromium 99.3 0.5 100 99.3 80-120 0.00 25 <br /> Cobalt 99.4 0.5 100 99.4 80-120 0.261 25 <br /> Copper 109 0.5 100 109 80-120 0.459 25 <br /> Lead 101 0.5 100 101 80-120 0.492 25 <br /> Molybdenum 100 0.5 100 100 80-120 0.791 25 <br /> Lead 101 1.0 100 101 80-120 0.492 25 <br /> Nickel 101 0.5 100 101 80-120 0.00 25 <br /> Selenium 108 0.5 100 108 80-120 3.54 25 <br /> Silver 101 0.5 100 101 80-120 0.886 25 <br /> Thallium 105 0.5 100 105 80-120 0.664 25 <br /> Vanadium 98.1 0.5 100 98.1 80-120 0.849 25 <br /> Zinc 99.4 0.5 100 99.4 80-120 0.861 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 9 of 17 <br />