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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 04/13/17 12:53 <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[D0067-EPA 6010B <br /> Blank(A[D0067-BLK1) Prepared:04/10/17 Analyzed:04/11/17 <br /> Arsenic ND 1.0 mg/kg <br /> Lead ND 1.0 " <br /> LCS(A[D0067-BSI) Prepared:04/10/17 Analyzed:04/11/17 <br /> Arsenic 90.7 1.0 mg/kg 100 90.7 80-120 <br /> Lead 89.3 1.0 100 89.3 80-120 <br /> LCS Dup(A[D0067-BSD1) Prepared:04/10/17 Analyzed:04/11/17 <br /> Arsenic 95.2 1.0 mg/kg 100 95.2 80-120 4.92 25 <br /> Lead 93.4 1.0 100 93.4 80-120 4.46 25 <br /> Matrix Spike(A[D0067-MS1) Source:1704004-02 Prepared:04/10/17 Analyzed:04/11/17 <br /> Arsenic 104 1.0 mg/kg 100 19.0 85.5 75-125 <br /> Lead 140 1.0 100 71.5 68.1 75-125 QM-01 <br /> Matrix Spike Dup(A[D0067-MSD1) Source:1704004-02 Prepared:04/10/17 Analyzed:04/11/17 <br /> Arsenic 110 1.0 mg/kg 100 19.0 90.9 75-125 5.04 25 <br /> Lead 142 1.0 " 100 71.5 70.8 75-125 1.92 25 QM-01 <br /> EXcelchenl Environmental Lab. The results in this report apply to the samples analyzed in accordance with the chain of <br /> y custody document.This analytical report must be reproduced in its entirety. <br /> Laboratory Representative Page 9 of It <br />