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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 /> 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[H0138-EPA 6010B <br /> Blank(A[H0138-BLK1) Prepared&Analyzed:08/14/17 <br /> Arsenic ND 0.2 mg/L <br /> Lead ND 0.2 11 <br /> LCS(A[H0138-BS1) Prepared&Analyzed:08/14/17 <br /> Arsenic 22.3 0.2 mg/L 20.0 112 80-120 <br /> Lead 19.2 0.2 20.0 95.8 80-120 <br /> LCS Dup(A[H0138-BSD1) Prepared&Analyzed:08/14/17 <br /> Arsenic 22.2 0.2 mg/L 20.0 111 80-120 0.359 25 <br /> Lead 19.2 0.2 20.0 95.8 80-120 0.104 25 <br /> Matrix Spike(A[H0138-MS1) Source: 1708081-02 Prepared&Analyzed:08/14/17 <br /> Arsenic 22.6 0.2 mg/L 20.0 0.190 112 75-125 <br /> Lead 19.0 0.2 20.0 0.00600 95.2 75-125 <br /> Matrix Spike Dup(A[H0138-MSD1) Source:1708081-02 Prepared&Analyzed:08/14/17 <br /> Arsenic 22.4 0.2 mg/L 20.0 0.190 111 75-125 0.843 25 <br /> Lead 19.0 0.2 11 20.0 0.00600 94.9 75-125 0.315 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 />