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Excelchem Environmental Labs <br /> DTE Stockton,LLC Project: Ash <br /> 2526 W.Washington St. Project Number: 4701052861 Date Reported: <br /> Stockton,CA 95203 Project Manager: Dan Crawford 08/10/17 18:03 <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[H0104-EPA 6010B <br /> Blank(A[H0104-BLK1) Prepared&Analyzed:08/10/17 <br /> Arsenic ND 0.2 mg/L <br /> Lead ND 0.2 11 <br /> LCS(A[H0104-BS1) Prepared&Analyzed:08/10/17 <br /> Arsenic 20.6 0.2 mg/L 20.0 103 80-120 <br /> Lead 18.8 0.2 20.0 94.2 80-120 <br /> LCS Dup(A[H0104-BSD1) Prepared&Analyzed:08/10/17 <br /> Arsenic 20.7 0.2 mg/L 20.0 103 80-120 0.388 25 <br /> Lead 19.0 0.2 20.0 94.9 80-120 0.687 25 <br /> Matrix Spike(A[H0104-MS1) Source:1708063-01 Prepared&Analyzed:08/10/17 <br /> Arsenic 21.4 0.2 mg/L 20.0 0.0671 107 75-125 <br /> Lead 18.7 0.2 20.0 0.0123 93.3 75-125 <br /> Matrix Spike Dup(A[H0104-MSD1) Source:1708063-01 Prepared&Analyzed:08/10/17 <br /> Arsenic 21.6 0.2 mg/L 20.0 0.0671 108 75-125 0.791 25 <br /> Lead 18.7 0.2 11 20.0 0.0123 93.6 75-125 0.374 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 />