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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 03/16/17 17:45 <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[C0047-EPA 6010B <br /> Blank(A[C0047-BLK1) Prepared:03/07/17 Analyzed:03/08/17 <br /> Arsenic ND 1.0 mg/kg <br /> Lead ND 1.0 " <br /> LCS(A[C0047-BSI) Prepared:03/07/17 Analyzed:03/08/17 <br /> Arsenic 85.6 1.0 mg/kg 100 85.6 80-120 <br /> Lead 88.2 1.0 100 88.2 80-120 <br /> LCS Dup(A[C0047-BSD1) Prepared:03/07/17 Analyzed:03/08/17 <br /> Arsenic 95.4 1.0 mg/kg 100 95.4 80-120 10.8 25 <br /> Lead 98.2 1.0 100 98.2 80-120 10.7 25 <br /> Matrix Spike(A[C0047-MS1) Source:1703020-01 Prepared:03/07/17 Analyzed:03/08/17 <br /> Arsenic 108 1.0 mg/kg 100 21.0 86.6 75-125 <br /> Lead 115 1.0 100 43.6 71.1 75-125 QL-01 <br /> Matrix Spike Dup(A[C0047-MSD1) Source:1703020-01 Prepared:03/07/17 Analyzed:03/08/17 <br /> Arsenic 117 1.0 mg/kg 100 21.0 96.4 75-125 8.63 25 <br /> Lead 123 1.0 " 100 43.6 79.6 75-125 7.15 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 />