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Excelchem Laboratories,Inc. <br /> DTE Stockton,LLC Project: 2020 Annual Fly Ash Profiling <br /> 2526 W.Washington St. Project Number: 4700995195 Date Reported: <br /> Stockton,CA 95203 Project Manager: Genny Huffinan 04/10/20 21:33 <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 AAD0044-EPA 6010B <br /> LCS Dup(AAD0044-BSDI) Prepared:04/07/20 Analyzed:04/09/20 <br /> Antimony 94.9 0.5 mg/kg 100 94.9 80-120 1.10 25 <br /> Arsenic 98.4 1.0 100 98.4 80-120 1.37 25 <br /> Arsenic 98.4 0.5 100 98.4 80-120 1.37 25 <br /> Barium 97.5 0.5 100 97.5 80-120 1.71 25 <br /> Beryllium 96.8 0.5 100 96.8 80-120 1.58 25 <br /> Cadmium 97.8 0.5 100 97.8 80-120 1.40 25 <br /> Chromium 98.4 0.5 100 98.4 80-120 1.94 25 <br /> Cobalt 99.2 0.5 100 99.2 80-120 1.57 25 <br /> Copper 100 0.5 100 100 80-120 1.29 25 <br /> Lead 98.1 0.5 100 98.1 80-120 1.59 25 <br /> Copper 100 2.0 100 100 80-120 1.29 25 <br /> Molybdenum 98.8 0.5 100 98.8 80-120 2.19 25 <br /> Lead 98.1 1.0 100 98.1 80-120 1.59 25 <br /> Nickel 97.6 0.5 100 97.6 80-120 1.55 25 <br /> Selenium 95.9 0.5 100 95.9 80-120 1.53 25 <br /> Silver 101 0.5 100 101 80-120 0.887 25 <br /> Thallium 97.7 0.5 100 97.7 80-120 1.10 25 <br /> Vanadium 99.5 0.5 100 99.5 80-120 0.870 25 <br /> Zinc 98.3 0.5 100 98.3 80-120 1.39 25 <br /> Matrix Spike(A^D0044-MS1) Source:2004026-01 Prepared:04/07/20 Analyzed:04/09/20 <br /> Antimony 54.9 0.5 mg/kg 100 0.291 54.6 75-125 QM-01 <br /> Arsenic 98.5 0.5 100 0.292 98.2 75-125 <br /> Arsenic 98.5 1.0 100 0.292 98.2 75-125 <br /> Barium 106 0.5 100 9.05 97.4 75-125 <br /> Beryllium 96.8 0.5 100 ND 96.8 75-125 <br /> Cadmium 97.0 0.5 100 ND 97.0 75-125 <br /> Chromium 114 0.5 100 3.53 111 75-125 <br /> Cobalt 96.7 0.5 100 0.526 96.2 75-125 <br /> Copper 102 0.5 100 6.29 95.5 75-125 <br /> Copper 102 2.0 100 6.29 95.5 75-125 <br /> Lead 96.4 0.5 100 2.30 94.1 75-125 <br /> Molybdenum 94.3 0.5 100 0.281 94.0 75-125 <br /> Nickel 106 0.5 100 5.04 101 75-125 <br /> Lead 96.4 1.0 100 2.30 94.1 75-125 <br /> Selenium 95.4 0.5 100 ND 95.4 75-125 <br /> Silver 70.9 0.5 100 ND 70.9 75-125 QM-01 <br /> Thallium 89.7 0.5 100 ND 89.7 75-125 <br /> Vanadium 97.7 0.5 100 1.70 96.0 75-125 <br /> Zinc 108 0.5 100 11.8 96.2 75-125 <br /> Excelchem Laboratories.Tnc. 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 19 <br />