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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 08/07/17 12:10 <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[H0052-EPA 6010B <br /> Blank(A[H0052-BLK1) Prepared:08/03/17 Analyzed:08/04/17 <br /> Arsenic ND 1.0 mg/kg <br /> Lead ND 1.0 " <br /> LCS(A[H0052-BS1) Prepared:08/03/17 Analyzed:08/04/17 <br /> Arsenic 99.9 1.0 mg/kg 100 99.9 80-120 <br /> Lead 97.4 1.0 100 97.4 80-120 <br /> LCS Dup(A[H0052-BSD1) Prepared:08/03/17 Analyzed:08/04/17 <br /> Arsenic 100 1.0 mg/kg 100 100 80-120 0.589 25 <br /> Lead 103 1.0 100 103 80-120 5.28 25 <br /> Matrix Spike(A[H0052-MS1) Source:1708005-01 Prepared:08/03/17 Analyzed:08/04/17 <br /> Arsenic 122 1.0 mg/kg 100 17.8 105 75-125 <br /> Lead 116 1.0 100 27.0 88.7 75-125 <br /> Matrix Spike Dup(A[H0052-MSD1) Source:1708005-01 Prepared:08/03/17 Analyzed:08/04/17 <br /> Arsenic 121 1.0 mg/kg 100 17.8 103 75-125 1.23 25 <br /> Lead 116 1.0 " 100 27.0 89.3 75-125 0.517 25 <br /> EXcetchern 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 6 of <br />