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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 04/10/17 18:12 <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[D0021-EPA 6010B <br /> Blank(A[D0021-BLK1) Prepared:04/03/17 Analyzed:04/04/17 <br /> Arsenic ND 0.2 mg/L <br /> Lead ND 0.2 11 <br /> LCS(A[D0021-BSI) Prepared:04/03/17 Analyzed:04/04/17 <br /> Arsenic 21.3 0.2 mg/L 20.0 106 80-120 <br /> Lead 19.6 0.2 20.0 98.0 80-120 <br /> LCS Dup(A[D0021-BSD1) Prepared:04/03/17 Analyzed:04/04/17 <br /> Arsenic 21.2 0.2 mg/L 20.0 106 80-120 0.141 25 <br /> Lead 19.5 0.2 20.0 97.5 80-120 0.512 25 <br /> Matrix Spike(A[D0021-MSI) Source:1703185-01 Prepared:04/03/17 Analyzed:04/04/17 <br /> Arsenic 23.9 0.2 mg/L 20.0 2.15 109 75-125 <br /> Lead 20.0 0.2 20.0 0.508 97.5 75-125 <br /> Matrix Spike Dup(A[D0021-MSD1) Source:1703185-01 Prepared:04/03/17 Analyzed:04/04/17 <br /> Arsenic 23.5 0.2 mg/L 20.0 2.15 107 75-125 1.56 25 <br /> Lead 19.8 0.2 11 20.0 0.508 96.6 75-125 0.954 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 />