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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 03/28/17 17:04 <br /> STLC Analysis-Quality Control <br /> Reporting Spike Source %REC RPD <br /> Analyte Result Limit Units Level Result %REC Limits RPD Limit Notes <br /> Batch A[C0172-EPA 6010B <br /> Blank(A[C0172-BLK1) Prepared&Analyzed:03/22/17 <br /> Arsenic ND 0.2 mg/L <br /> Lead ND 0.2 11 <br /> LCS(A[C0172-BSI) Prepared&Analyzed:03/22/17 <br /> Arsenic 20.7 0.2 mg/L 20.0 104 80-120 <br /> Lead 18.9 0.2 20.0 94.6 80-120 <br /> LCS Dup(A[C0172-BSD1) Prepared&Analyzed:03/22/17 <br /> Arsenic 20.4 0.2 mg/L 20.0 102 80-120 1.26 25 <br /> Lead 19.0 0.2 20.0 95.0 80-120 0.422 25 <br /> Matrix Spike(A[C0172-MS1) Source:1703110-01 Prepared&Analyzed:03/22/17 <br /> Arsenic 20.4 0.2 mg/L 20.0 0.0539 102 75-125 <br /> Lead 18.4 0.2 20.0 0.0725 91.7 75-125 <br /> Matrix Spike Dup(A[C0172-MSD1) Source:1703110-01 Prepared&Analyzed:03/22/17 <br /> Arsenic 20.3 0.2 mg/L 20.0 0.0539 101 75-125 0.491 25 <br /> Lead 18.5 0.2 11 20.0 0.0725 92.2 75-125 0.542 25 <br /> EXcelchem.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 10 of 11 <br />