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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 /> LCS(A[K0120-BS1) Prepared: 11/15/17 Analyzed: 11/16/17 <br /> Antimony 94.0 1.0 mg/kg 100 94.0 80-120 <br /> Arsenic 91.7 1.0 100 91.7 80-120 <br /> Arsenic 91.7 1.0 100 91.7 80-120 <br /> Barium 99.9 2.0 100 99.9 80-120 <br /> Beryllium 92.0 0.5 100 92.0 80-120 <br /> Cadmium 91.5 1.0 100 91.5 80-120 <br /> Chromium 92.6 1.0 100 92.6 80-120 <br /> Cobalt 94.5 5.0 100 94.5 80-120 <br /> Copper 94.9 2.0 100 94.9 80-120 <br /> Lead 93.2 1.0 100 93.2 80-120 <br /> Molybdenum 91.5 1.0 100 91.5 80-120 <br /> Lead 93.2 1.0 100 93.2 80-120 <br /> Nickel 92.0 1.0 100 92.0 80-120 <br /> Selenium 89.1 2.0 100 89.1 80-120 <br /> Silver 96.6 1.0 100 96.6 80-120 <br /> Thallium 91.0 2.0 100 91.0 80-120 <br /> Vanadium 95.8 2.0 100 95.8 80-120 <br /> Zinc 91.2 2.0 100 91.2 80-120 <br /> LCS Dup(A[K0120-BSD1) Prepared:11/15/17 Analyzed: 11/16/17 <br /> Antimony 96.2 1.0 mg/kg 100 96.2 80-120 2.30 25 <br /> Arsenic 93.8 1.0 100 93.8 80-120 2.32 25 <br /> Arsenic 93.8 1.0 100 93.8 80-120 2.32 25 <br /> Barium 102 2.0 100 102 80-120 2.46 25 <br /> Beryllium 94.8 0.5 100 94.8 80-120 2.92 25 <br /> Cadmium 93.6 1.0 100 93.6 80-120 2.33 25 <br /> Chromium 95.0 1.0 100 95.0 80-120 2.61 25 <br /> Cobalt 97.0 5.0 100 97.0 80-120 2.58 25 <br /> Copper 97.8 2.0 100 97.8 80-120 3.04 25 <br /> Lead 95.7 1.0 100 95.7 80-120 2.66 25 <br /> Molybdenum 93.8 1.0 100 93.8 80-120 2.54 25 <br /> Lead 95.7 1.0 100 95.7 80-120 2.66 25 <br /> Nickel 94.3 1.0 100 94.3 80-120 2.43 25 <br /> Selenium 91.0 2.0 100 91.0 80-120 2.09 25 <br /> Silver 99.6 1.0 100 99.6 80-120 3.12 25 <br /> Thallium 93.3 2.0 100 93.3 80-120 2.49 25 <br /> Vanadium 98.8 2.0 100 98.8 80-120 3.06 25 <br /> Zinc 93.6 2.0 100 93.6 80-120 2.62 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 8 of 15 <br />