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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 11/10/17 17:33 <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 A[K0061-EPA 6010B <br /> LCS Dup(A[K0061-BSD1) Prepared: 11/08/17 Analyzed: 11/09/17 <br /> Antimony 98.7 1.0 mg/kg 100 98.7 80-120 0.977 25 <br /> Arsenic 96.6 1.0 100 96.6 80-120 0.602 25 <br /> Arsenic 96.6 1.0 100 96.6 80-120 0.602 25 <br /> Barium 96.8 2.0 100 96.8 80-120 0.186 25 <br /> Beryllium 99.1 0.5 100 99.1 80-120 0.131 25 <br /> Cadmium 97.3 1.0 100 97.3 80-120 1.16 25 <br /> Chromium 95.4 1.0 100 95.4 80-120 0.450 25 <br /> Cobalt 99.5 5.0 100 99.5 80-120 0.0101 25 <br /> Copper 99.2 2.0 100 99.2 80-120 0.414 25 <br /> Lead 97.4 1.0 100 97.4 80-120 0.618 25 <br /> Molybdenum 93.8 1.0 100 93.8 80-120 0.553 25 <br /> Nickel 95.2 1.0 100 95.2 80-120 0.368 25 <br /> Lead 97.4 1.0 100 97.4 80-120 0.618 25 <br /> Selenium 95.9 2.0 100 95.9 80-120 2.97 25 <br /> Silver 102 1.0 100 102 80-120 1.09 25 <br /> Thallium 101 2.0 100 101 80-120 1.61 25 <br /> Vanadium 98.9 2.0 100 98.9 80-120 0.142 25 <br /> Zinc 96.6 2.0 100 96.6 80-120 0.999 25 <br /> Matrix Spike(A[K0061-MS1) Source:1711018-21 Prepared:11/08/17 Analyzed:11/09/17 <br /> Antimony 89.8 1.0 mg/kg 100 0.554 89.3 75-125 <br /> Arsenic 93.2 1.0 100 ND 93.2 75-125 <br /> Arsenic 93.2 1.0 100 ND 93.2 75-125 <br /> Barium 103 2.0 100 12.8 90.5 75-125 <br /> Beryllium 96.8 0.5 100 0.016 96.8 75-125 <br /> Cadmium 97.8 1.0 100 ND 97.8 75-125 <br /> Chromium 93.1 1.0 100 5.26 87.8 75-125 <br /> Cobalt 95.1 5.0 100 0.667 94.5 75-125 <br /> Copper 96.3 2.0 100 3.48 92.9 75-125 <br /> Lead 93.1 1.0 100 0.900 92.2 75-125 <br /> Molybdenum 87.8 1.0 100 0.388 87.4 75-125 <br /> Nickel 92.3 1.0 100 2.32 90.0 75-125 <br /> Lead 93.1 1.0 100 0.900 92.2 75-125 <br /> Selenium 95.4 2.0 100 ND 95.4 75-125 <br /> Silver 97.5 1.0 100 ND 97.5 75-125 <br /> Thallium 96.3 2.0 100 ND 96.3 75-125 <br /> Vanadium 92.7 2.0 100 1.97 90.7 75-125 <br /> Zinc 106 2.0 100 17.1 88.8 75-125 <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 />