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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 02/08/17 17:54 <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[B0023-EPA 6010B <br /> Blank(A[B0023-BLKI) Prepared:02/02/17 Analyzed:02/03/17 <br /> Arsenic ND 1.0 mg/kg <br /> Lead ND 1.0 " <br /> LCS(A[B0023-BS1) Prepared:02/02/17 Analyzed:02/03/17 <br /> Arsenic 87.1 1.0 mg/kg 100 87.1 80-120 <br /> Lead 90.2 1.0 100 90.2 80-120 <br /> LCS Dup(A[B0023-BSD1) Prepared:02/02/17 Analyzed:02/03/17 <br /> Arsenic 91.8 1.0 mg/kg 100 91.8 80-120 5.20 25 <br /> Lead 94.5 1.0 100 94.5 80-120 4.66 25 <br /> Matrix Spike(A[B0023-MS1) Source:1702006-01 Prepared:02/02/17 Analyzed:02/03/17 <br /> Arsenic 90.4 1.0 mg/kg 100 2.69 87.7 75-125 <br /> Lead 93.9 1.0 100 24.0 69.9 75-125 QL-01 <br /> Matrix Spike Dup(A[B0023-MSD1) Source:1702006-01 Prepared:02/02/17 Analyzed:02/03/17 <br /> Arsenic 88.7 1.0 mg/kg 100 2.69 86.0 75-125 1.85 25 <br /> Lead 92.8 1.0 " 100 24.0 68.8 75-125 1.18 25 QL-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 5 of <br />