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Excelchem Environmental Labs <br /> DTE Stockton,LLC Project: Ash <br /> 2526 W.Washington St. Project Number: 4701052861 Date Reported: <br /> Stockton,CA 95203 Project Manager: Dan Crawford 11/16/17 18:05 <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[K0120-EPA 6010B <br /> Matrix Spike(A[K0120-MS1) Source:1711082-01 Prepared: 11/15/17 Analyzed: 11/16/17 <br /> Antimony 62.2 1.0 mg/kg 100 1.79 60.4 75-125 QM-01 <br /> Arsenic 121 1.0 100 29.8 91.2 75-125 <br /> Arsenic 121 1.0 100 29.8 91.2 75-125 <br /> Barium 388 2.0 100 320 67.2 75-125 QM-01 <br /> Beryllium 90.7 0.5 100 0.103 90.6 75-125 <br /> Cadmium 94.9 1.0 100 1.54 93.4 75-125 <br /> Chromium 112 1.0 100 26.6 85.3 75-125 <br /> Cobalt 90.0 5.0 100 5.50 84.5 75-125 <br /> Copper 177 2.0 100 111 66.3 75-125 QM-01 <br /> Lead 121 1.0 100 45.6 75.4 75-125 <br /> Molybdenum 89.6 1.0 100 2.48 87.1 75-125 <br /> Nickel 98.1 1.0 100 18.0 80.1 75-125 <br /> Lead 121 1.0 100 45.6 75.4 75-125 <br /> Selenium 87.4 2.0 100 ND 87.4 75-125 <br /> Silver 90.4 1.0 100 0.056 90.4 75-125 <br /> Thallium 73.2 2.0 100 ND 73.2 75-125 QM-01 <br /> Vanadium 110 2.0 100 27.4 83.0 75-125 <br /> Zinc 342 2.0 100 299 43.8 75-125 QM-01 <br /> Matrix Spike Dup(A[K0120-MSD1) Source:1711082-01 Prepared:11/15/17 Analyzed:11/16/17 <br /> Antimony 92.4 1.0 mg/kg 100 1.79 90.6 75-125 39.0 25 QR-03 <br /> Arsenic 170 1.0 100 29.8 140 75-125 33.6 25 QM-11 <br /> Arsenic 170 1.0 100 29.8 140 75-125 33.6 25 QM-11 <br /> Barium 423 2.0 100 320 102 75-125 8.64 25 <br /> Beryllium 124 0.5 100 0.103 124 75-125 31.4 25 QR-02 <br /> Cadmium 131 1.0 100 1.54 130 75-125 32.2 25 QM-11 <br /> Chromium 147 1.0 100 26.6 120 75-125 26.9 25 QR-02 <br /> Cobalt 122 5.0 100 5.50 116 75-125 29.9 25 QR-02 <br /> Copper 235 2.0 100 111 124 75-125 28.2 25 QR-03 <br /> Lead 155 1.0 100 45.6 109 75-125 24.6 25 <br /> Molybdenum 123 1.0 100 2.48 120 75-125 31.4 25 QR-02 <br /> Nickel 129 1.0 100 18.0 111 75-125 27.1 25 QR-02 <br /> Lead 155 1.0 100 45.6 109 75-125 24.6 25 <br /> Selenium 122 2.0 100 ND 122 75-125 33.3 25 QR-02 <br /> Silver 98.7 1.0 100 0.056 98.7 75-125 8.79 25 <br /> Thallium 100 2.0 100 ND 100 75-125 31.3 25 QR-03 <br /> Vanadium 142 2.0 100 27.4 115 75-125 25.0 25 <br /> Zinc 389 2.0 100 299 90.4 75-125 12.7 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 15 <br />