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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 08/14/17 17:36 <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[H0118-EPA 6010B <br /> Blank(A[H0118-BLK1) Prepared:08/10/17 Analyzed:08/11/17 <br /> Arsenic ND 1.0 mg/kg <br /> Lead ND 1.0 " <br /> LCS(A[H0118-BS1) Prepared:08/10/17 Analyzed:08/11/17 <br /> Arsenic 89.7 1.0 mg/kg 100 89.7 80-120 <br /> Lead 92.4 1.0 100 92.4 80-120 <br /> LCS Dup(A[H0118-BSD1) Prepared:08/10/17 Analyzed:08/11/17 <br /> Arsenic 92.4 1.0 mg/kg 100 92.4 80-120 3.00 25 <br /> Lead 94.7 1.0 100 94.7 80-120 2.44 25 <br /> Matrix Spike(A[H0118-MS1) Source:1708079-01 Prepared:08/10/17 Analyzed:08/11/17 <br /> Arsenic 112 1.0 mg/kg 100 18.8 93.0 75-125 <br /> Lead 107 1.0 100 32.6 74.6 75-125 QM-01 <br /> Matrix Spike Dup(A[H0118-MSD1) Source:1708079-01 Prepared:08/10/17 Analyzed:08/11/17 <br /> Arsenic 110 1.0 mg/kg 100 18.8 90.7 75-125 2.08 25 <br /> Lead 105 1.0 " 100 32.6 72.0 75-125 2.46 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 6 of <br />