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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 03/16/17 17:45 <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[C0088-EPA 6010B <br /> Blank(A[C0088-BLK1) Prepared:03/13/17 Analyzed:03/14/17 <br /> Arsenic ND 0.2 mg/L <br /> Lead ND 0.2 11 <br /> LCS(A[C0088-BSI) Prepared:03/13/17 Analyzed:03/14/17 <br /> Arsenic 20.9 0.2 mg/L 20.0 105 80-120 <br /> Lead 19.1 0.2 20.0 95.6 80-120 <br /> LCS Dup(A[C0088-BSD1) Prepared:03/13/17 Analyzed:03/14/17 <br /> Arsenic 21.1 0.2 mg/L 20.0 105 80-120 0.571 25 <br /> Lead 19.2 0.2 20.0 95.9 80-120 0.366 25 <br /> Matrix Spike(A[C0088-MS1) Source:1703020-02 Prepared:03/13/17 Analyzed:03/14/17 <br /> Arsenic 23.1 0.2 mg/L 20.0 0.964 111 75-125 <br /> Lead 17.0 0.2 20.0 ND 85.0 75-125 <br /> Matrix Spike Dup(A[C0088-MSD1) Source:1703020-02 Prepared:03/13/17 Analyzed:03/14/17 <br /> Arsenic 23.2 0.2 mg/L 20.0 0.964 111 75-125 0.691 25 <br /> Lead 16.8 0.2 11 20.0 ND 83.8 75-125 1.42 25 <br /> EXcelchern 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 />