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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 08/07/17 12:10 <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[H0056-EPA 6010B <br /> Blank(A[H0056-BLK1) Prepared&Analyzed:08/04/17 <br /> Arsenic ND 0.2 mg/L <br /> Lead ND 0.2 11 <br /> LCS(A[H0056-BS1) Prepared&Analyzed:08/04/17 <br /> Arsenic 22.4 0.2 mg/L 20.0 112 80-120 <br /> Lead 19.0 0.2 20.0 94.8 80-120 <br /> LCS Dup(A[H0056-BSD1) Prepared&Analyzed:08/04/17 <br /> Arsenic 22.9 0.2 mg/L 20.0 114 80-120 1.85 25 <br /> Lead 19.3 0.2 20.0 96.6 80-120 1.88 25 <br /> Matrix Spike(A[H0056-MS1) Source:1708005-01 Prepared&Analyzed:08/04/17 <br /> Arsenic 24.1 0.2 mg/L 20.0 1.34 114 75-125 <br /> Lead 18.7 0.2 20.0 0.0569 93.3 75-125 <br /> Matrix Spike Dup(A[H0056-MSD1) Source:1708005-01 Prepared&Analyzed:08/04/17 <br /> Arsenic 24.0 0.2 mg/L 20.0 1.34 113 75-125 0.291 25 <br /> Lead 18.9 0.2 1120.0 0.0569 94.0 75-125 0.799 25 <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 7 of <br />