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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 02/07/17 15:07 <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[A0157-EPA 6010B <br /> Blank(A[A0157-BLK1) Prepared&Analyzed:01/26/17 <br /> Arsenic ND 0.2 mg/L <br /> Lead ND 0.2 11 <br /> LCS(A[A0157-BSI) Prepared&Analyzed:01/26/17 <br /> Arsenic 19.7 0.2 mg/L 20.0 98.7 80-120 <br /> Lead 19.6 0.2 20.0 97.8 80-120 <br /> LCS Dup(A[A0157-BSD1) Prepared&Analyzed:01/26/17 <br /> Arsenic 19.9 0.2 mg/L 20.0 99.6 80-120 0.858 25 <br /> Lead 19.9 0.2 20.0 99.4 80-120 1.57 25 <br /> Matrix Spike(A[A0157-MSI) Source:1612065-01 Prepared&Analyzed:01/26/17 <br /> Arsenic 21.6 0.2 mg/L 20.0 0.0609 108 75-125 <br /> Lead 19.2 0.2 20.0 1.00 91.2 75-125 <br /> Matrix Spike Dup(A[A0157-MSD1) Source:1612065-01 Prepared&Analyzed:01/26/17 <br /> Arsenic 21.5 0.2 mg/L 20.0 0.0609 107 75-125 0.510 25 <br /> Lead 19.3 0.2 11 20.0 1.00 91.6 75-125 0.415 25 <br /> EXcelchem.Environmental Lab. The results in this report apply to the samples analyzed in accordance with the chain of <br /> y custody document.This analytical report must be reproduced in its entirety. <br /> Laboratory Representative Page 8 of <br />