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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 11/15/17 17:57 <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[K0119-EPA 6010B <br /> Blank(A[K0119-BLK1) Prepared&Analyzed: 11/15/17 <br /> Arsenic ND 0.2 mg/L <br /> Lead ND 0.2 " <br /> LCS(A[K0119-BSI) Prepared&Analyzed:11/15/17 <br /> Arsenic 19.9 0.2 mg/L 20.0 99.6 80-120 <br /> Lead 20.0 0.2 20.0 99.8 80-120 <br /> LCS Dup(A[K0119-BSD1) Prepared&Analyzed: 11/15/17 <br /> Arsenic 19.9 0.2 mg/L 20.0 99.6 80-120 0.0502 25 <br /> Lead 19.9 0.2 20.0 99.4 80-120 0.301 25 <br /> Matrix Spike(A[K0119-MS1) Source:1711059-01 Prepared&Analyzed: 11/15/17 <br /> Arsenic 21.6 0.2 mg/L 20.0 0.0401 108 75-125 <br /> Lead 19.0 0.2 20.0 0.0442 94.9 75-125 <br /> Matrix Spike Dup(A[K0119-MSD1) Source:1711059-01 Prepared&Analyzed:11/15/17 <br /> Arsenic 21.2 0.2 mg/L 20.0 0.0401 106 75-125 2.01 25 <br /> Lead 18.7 0.2 " 20.0 0.0442 93.3 75-125 1.75 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 15 of 17 <br />