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Excelchem Environmental Labs <br /> DTE Stockton,LLC Project: Ash <br /> 2526 W.Washington St. Project Number: #4701180998 Date Reported: <br /> Stockton,CA 95203 Project Manager: Dan Crawford 05/23/18 17:09 <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\E0208-EPA 6010B <br /> LCS(A\E0208-BS1) Prepared&Analyzed:05/23/18 <br /> Antimony 97.2 1.0 mg/kg 100 97.2 80-120 <br /> Arsenic 95.8 1.0 100 95.8 80-120 <br /> Arsenic 95.8 1.0 100 95.8 80-120 <br /> Barium 87.4 2.0 100 87.4 80-120 <br /> Beryllium 94.0 0.5 100 94.0 80-120 <br /> Cadmium 94.5 1.0 100 94.5 80-120 <br /> Chromium 95.1 1.0 100 95.1 80-120 <br /> Cobalt 95.6 5.0 100 95.6 80-120 <br /> Copper 92.5 2.0 100 92.5 80-120 <br /> Lead 96.3 1.0 100 96.3 80-120 <br /> Molybdenum 98.6 1.0 100 98.6 80-120 <br /> Nickel 96.9 1.0 100 96.9 80-120 <br /> Lead 96.3 1.0 100 96.3 80-120 <br /> Selenium 94.3 2.0 100 94.3 80-120 <br /> Silver 81.1 1.0 100 81.1 80-120 <br /> Thallium 95.4 2.0 100 95.4 80-120 <br /> Vanadium 87.0 2.0 100 87.0 80-120 <br /> Zinc 95.5 2.0 100 95.5 80-120 <br /> LCS Dup(A\E0208-BSD1) Prepared&Analyzed:05/23/18 <br /> Antimony 100 1.0 mg/kg 100 100 80-120 3.26 25 <br /> Arsenic 97.7 1.0 100 97.7 80-120 1.97 25 <br /> Arsenic 97.7 1.0 100 97.7 80-120 1.97 25 <br /> Barium 85.4 2.0 100 85.4 80-120 2.22 25 <br /> Beryllium 95.7 0.5 100 95.7 80-120 1.80 25 <br /> Cadmium 96.4 1.0 100 96.4 80-120 1.92 25 <br /> Chromium 97.4 1.0 100 97.4 80-120 2.38 25 <br /> Cobalt 97.9 5.0 100 97.9 80-120 2.42 25 <br /> Copper 93.5 2.0 100 93.5 80-120 1.01 25 <br /> Lead 98.6 1.0 100 98.6 80-120 2.40 25 <br /> Molybdenum 102 1.0 100 102 80-120 3.09 25 <br /> Lead 98.6 1.0 100 98.6 80-120 2.40 25 <br /> Nickel 98.9 1.0 100 98.9 80-120 2.00 25 <br /> Selenium 96.7 2.0 100 96.7 80-120 2.48 25 <br /> Silver 78.7 1.0 100 78.7 80-120 2.99 25 QR-04 <br /> Thallium 98.2 2.0 100 98.2 80-120 2.86 25 <br /> Vanadium 88.4 2.0 100 88.4 80-120 1.62 25 <br /> Zinc 95.9 2.0 100 95.9 80-120 0.460 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 7ofIt <br />