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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 06/13/18 16:19 <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\F0087-EPA 6010B <br /> Blank(A\F0087-BLK1) Prepared:06/11/18 Analyzed:06/12/18 <br /> Arsenic ND 0.2 mg/L <br /> Lead ND 0.2 " <br /> LCS(A\F0087-BS1) Prepared:06/11/18 Analyzed:06/12/18 <br /> Arsenic 21.3 0.2 mg/L 20.0 106 80-120 <br /> Lead 19.8 0.2 20.0 99.0 80-120 <br /> LCS Dup(A\F0087-BSD1) Prepared:06/11/18 Analyzed:06/12/18 <br /> Arsenic 21.6 0.2 mg/L 20.0 108 80-120 1.49 25 <br /> Lead 20.1 0.2 20.0 100 80-120 1.40 25 <br /> Matrix Spike(A\F0087-MS1) Source:1806052-01 Prepared:06/11/18 Analyzed:06/13/18 <br /> Arsenic 22.1 0.2 mg/L 20.0 0.647 107 75-125 <br /> Lead 18.0 0.2 20.0 ND 90.2 75-125 <br /> Matrix Spike Dup(A\F0087-MSD1) Source:1806052-01 Prepared:06/11/18 Analyzed:06/13/18 <br /> Arsenic 22.2 0.2 mg/L 20.0 0.647 108 75-125 0.271 25 <br /> Lead 18.2 0.2 " 20.0 ND 90.8 75-125 0.608 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 II of 13 <br />