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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 11/16/17 18:05 <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[K0135-EPA 6010B <br /> Blank(A[K0135-BLK1) Prepared&Analyzed: 11/16/17 <br /> Arsenic ND 0.2 mg/L <br /> Lead ND 0.2 " <br /> LCS(A[K0135-BS1) Prepared&Analyzed:11/16/17 <br /> Arsenic 19.8 0.2 mg/L 20.0 98.8 80-120 <br /> Lead 20.2 0.2 20.0 101 80-120 <br /> LCS Dup(A[K0135-BSD1) Prepared&Analyzed: 11/16/17 <br /> Arsenic 18.7 0.2 mg/L 20.0 93.7 80-120 5.30 25 <br /> Lead 19.1 0.2 20.0 95.6 80-120 5.40 25 <br /> Matrix Spike(A[K0135-MS1) Source:1711079-01 Prepared&Analyzed: 11/16/17 <br /> Arsenic 20.4 0.2 mg/L 20.0 0.133 101 75-125 <br /> Lead 18.8 0.2 20.0 0.375 92.2 75-125 <br /> Matrix Spike Dup(A[K0135-MSD1) Source:1711079-01 Prepared&Analyzed:11/16/17 <br /> Arsenic 20.4 0.2 mg/L 20.0 0.133 101 75-125 0.0979 25 <br /> Lead 18.8 0.2 " 20.0 0.375 92.0 75-125 0.213 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 13 of 15 <br />