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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 03/21/17 13:41 <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[C0072-EPA 6010B <br /> Blank(A[C0072-BLK1) Prepared:03/10/17 Analyzed:03/13/17 <br /> Arsenic ND 1.0 mg/kg <br /> Lead ND 1.0 " <br /> LCS(A[C0072-BSI) Prepared:03/10/17 Analyzed:03/13/17 <br /> Arsenic 94.7 1.0 mg/kg 100 94.7 80-120 <br /> Lead 97.8 1.0 100 97.8 80-120 <br /> LCS Dup(A[C0072-BSD1) Prepared:03/10/17 Analyzed:03/13/17 <br /> Arsenic 97.2 1.0 mg/kg 100 97.2 80-120 2.59 25 <br /> Lead 100 1.0 100 100 80-120 2.39 25 <br /> Matrix Spike(A[C0072-MS1) Source:1703056-01 Prepared:03/10/17 Analyzed:03/13/17 <br /> Arsenic 88.7 1.0 mg/kg 100 2.71 86.0 75-125 <br /> Lead 88.0 1.0 100 5.04 82.9 75-125 <br /> Matrix Spike Dup(A[C0072-MSD1) Source:1703056-01 Prepared:03/10/17 Analyzed:03/13/17 <br /> Arsenic 93.2 1.0 mg/kg 100 2.71 90.5 75-125 4.93 25 <br /> Lead 94.3 1.0 " 100 5.04 89.3 75-125 6.98 25 <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 />