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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 04/15/19 16:40 <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]D0098-EPA 6010B <br /> LCS Dup(A]D0098-BSD1) Prepared&Analyzed:04/10/19 <br /> Antimony 97.1 0.5 mg/kg 100 97.1 80-120 1.38 25 <br /> Arsenic 94.1 0.5 100 94.1 80-120 1.83 25 <br /> Arsenic 94.1 1.0 100 94.1 80-120 1.83 25 <br /> Barium 97.2 0.5 100 97.2 80-120 0.0514 25 <br /> Beryllium 96.8 0.5 100 96.8 80-120 1.24 25 <br /> Cadmium 92.2 0.5 100 92.2 80-120 1.83 25 <br /> Chromium 97.6 0.5 100 97.6 80-120 1.37 25 <br /> Cobalt 95.8 0.5 100 95.8 80-120 1.66 25 <br /> Copper 106 0.5 100 106 80-120 0.563 25 <br /> Lead 95.6 0.5 100 95.6 80-120 2.00 25 <br /> Molybdenum 99.6 0.5 100 99.6 80-120 1.23 25 <br /> Nickel 95.7 0.5 100 95.7 80-120 1.87 25 <br /> Lead 95.6 1.0 100 95.6 80-120 2.00 25 <br /> Selenium 89.6 0.5 100 89.6 80-120 1.91 25 <br /> Silver 92.3 0.5 100 92.3 80-120 0.335 25 <br /> Thallium 95.4 0.5 100 95.4 80-120 1.79 25 <br /> Vanadium 98.4 0.5 100 98.4 80-120 0.628 25 <br /> Zinc 93.4 0.5 100 93.4 80-120 1.70 25 <br /> Matrix Spike(A]D0098-MSI) Source:1904048-03 Prepared&Analyzed:04/10/19 <br /> Antimony 32.6 0.5 mg/kg 100 0.493 32.1 75-125 QM-01 <br /> Arsenic 99.5 1.0 100 4.33 95.2 75-125 <br /> Arsenic 99.5 0.5 100 4.33 95.2 75-125 <br /> Barium 373 0.5 100 239 134 75-125 QM-01 <br /> Beryllium 93.2 0.5 100 0.030 93.1 75-125 <br /> Cadmium 91.0 0.5 100 0.073 90.9 75-125 <br /> Chromium 110 0.5 100 18.6 91.4 75-125 <br /> Cobalt 87.7 0.5 100 4.94 82.7 75-125 <br /> Copper 172 0.5 100 66.8 105 75-125 <br /> Lead 84.3 0.5 100 4.08 80.2 75-125 <br /> Molybdenum 90.5 0.5 100 1.08 89.5 75-125 <br /> Nickel 101 0.5 100 15.5 85.1 75-125 <br /> Lead 84.3 1.0 100 4.08 80.2 75-125 <br /> Selenium 85.7 0.5 100 ND 85.7 75-125 <br /> Silver 86.7 0.5 100 0.682 86.0 75-125 <br /> Thallium 71.7 0.5 100 ND 71.7 75-125 QM-01 <br /> Vanadium 112 0.5 100 24.2 87.3 75-125 <br /> Zinc 169 0.5 100 37.3 132 75-125 QM-01 <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 18 <br />