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Excelchem Environmental Labs <br /> DTE Stockton,LLC Project: Ash <br /> 2526 W.Washington St. Project Number: [none] Date Reported: <br /> Stockton,CA 95203 Project Manager: Dan Crawford 05/18/18 18:07 <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\E0153-EPA 6010B <br /> Blank(A\E0153-BLK1) Prepared&Analyzed:05/18/18 <br /> Arsenic ND 1.0 mg/kg <br /> Lead ND 1.0 " <br /> LCS(A\E0153-BS1) Prepared&Analyzed:05/18/18 <br /> Arsenic 96.5 1.0 mg/kg 100 96.5 80-120 <br /> Lead 96.9 1.0 100 96.9 80-120 <br /> LCS Dup(A\E0153-BSD1) Prepared&Analyzed:05/18/18 <br /> Arsenic 97.8 1.0 mg/kg 100 97.8 80-120 1.40 25 <br /> Lead 98.3 1.0 100 98.3 80-120 1.41 25 <br /> Matrix Spike(A\E0153-MS1) Source:1805105-01 Prepared&Analyzed:05/18/18 <br /> Arsenic 109 1.0 mg/kg 100 10.4 98.9 75-125 <br /> Lead 84.0 1.0 100 4.62 79.4 75-125 <br /> Matrix Spike Dup(A\E0153-MSD1) Source:1805105-01 Prepared&Analyzed:05/18/18 <br /> Arsenic 99.6 1.0 mg/kg 100 10.4 89.2 75-125 9.30 25 <br /> Lead 77.1 1.0 " 100 4.62 72.4 75-125 8.62 25 QR-07 <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 6 of <br />