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Excelchem Environmental Labs <br /> DTE Stockton,LLC Project: Ash <br /> 2526 W.Washington St. Project Number: #4701180998 Date Reported: <br /> Stockton,CA 95203 Project Manager: Dan Crawford 06/07/18 16:27 <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\F0044-EPA 6010B <br /> Blank(A\F0044-BLK1) Prepared&Analyzed:06/06/18 <br /> Arsenic ND 0.2 mg/L <br /> Lead ND 0.2 " <br /> LCS(A\F0044-BS1) Prepared&Analyzed:06/06/18 <br /> Arsenic 19.5 0.2 mg/L 20.0 97.7 80-120 <br /> Lead 19.9 0.2 20.0 99.7 80-120 <br /> LCS Dup(A\F0044-BSD1) Prepared&Analyzed:06/06/18 <br /> Arsenic 19.5 0.2 mg/L 20.0 97.4 80-120 0.308 25 <br /> Lead 20.0 0.2 20.0 99.8 80-120 0.150 25 <br /> Matrix Spike(A\F0044-MS1) Source:1806007-01 Prepared&Analyzed:06/06/18 <br /> Arsenic 21.8 0.2 mg/L 20.0 0.354 107 75-125 <br /> Lead 19.4 0.2 20.0 1.19 91.1 75-125 <br /> Matrix Spike Dup(A\F0044-MSD1) Source:1806007-01 Prepared&Analyzed:06/06/18 <br /> Arsenic 21.9 0.2 mg/L 20.0 0.354 108 75-125 0.504 25 <br /> Lead 19.6 0.2 " 20.0 1.19 91.9 75-125 0.872 25 <br /> Excelchem Environmental Lab. The results in this report apply to the samples analyzed in accordance with the chain of <br /> custody document.This analytical report must be reproduced in its entirety. <br /> Laboratory Representative Page 12 of 14 <br />