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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 05/18/18 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\E0151-EPA 6010B <br /> Blank(A\E0151-BLK1) Prepared&Analyzed:05/18/18 <br /> Arsenic ND 0.2 mg/L <br /> Lead ND 0.2 " <br /> LCS(A\E0151-BS1) Prepared&Analyzed:05/18/18 <br /> Arsenic 19.3 0.2 mg/L 20.0 96.4 80-120 <br /> Lead 19.3 0.2 20.0 96.6 80-120 <br /> LCS Dup(A\E0151-BSD1) Prepared&Analyzed:05/18/18 <br /> Arsenic 19.2 0.2 mg/L 20.0 95.8 80-120 0.520 25 <br /> Lead 19.1 0.2 20.0 95.7 80-120 0.988 25 <br /> Matrix Spike(A\E0151-MS1) Source:1805107-01 Prepared&Analyzed:05/18/18 <br /> Arsenic 21.6 0.2 mg/L 20.0 0.845 104 75-125 <br /> Lead 18.9 0.2 20.0 0.665 91.2 75-125 <br /> Matrix Spike Dup(A\E0151-MSD1) Source:1805107-01 Prepared&Analyzed:05/18/18 <br /> Arsenic 21.9 0.2 mg/L 20.0 0.845 105 75-125 1.29 25 <br /> Lead 19.0 0.2 " 20.0 0.665 91.7 75-125 0.580 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 14 of 16 <br />