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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 08/10/17 17:35 <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[H0089-EPA 6010B <br /> Blank(A[H0089-BLK1) Prepared&Analyzed:08/09/17 <br /> Arsenic ND 1.0 mg/kg <br /> Lead ND 1.0 " <br /> LCS(A[H0089-BS1) Prepared&Analyzed:08/09/17 <br /> Arsenic 95.0 1.0 mg/kg 100 95.0 80-120 <br /> Lead 92.5 1.0 100 92.5 80-120 <br /> LCS Dup(A[H0089-BSD1) Prepared&Analyzed:08/09/17 <br /> Arsenic 96.8 1.0 mg/kg 100 96.8 80-120 1.86 25 <br /> Lead 94.3 1.0 100 94.3 80-120 1.94 25 <br /> Matrix Spike(A[H0089-MS1) Source:1708038-01 Prepared&Analyzed:08/09/17 <br /> Arsenic 117 1.0 mg/kg 100 22.8 94.5 75-125 <br /> Lead 106 1.0 100 31.4 74.7 75-125 QM-01 <br /> Matrix Spike Dup(A[H0089-MSD1) Source:1708038-01 Prepared&Analyzed:08/09/17 <br /> Arsenic 112 1.0 mg/kg 100 22.8 89.5 75-125 4.36 25 <br /> Lead 103 1.0 " 100 31.4 72.0 75-125 2.58 25 QM-01 <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 />