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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 04/13/17 12:53 <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[D0072-EPA 6010B <br /> Blank(A[D0072-BLK1) Prepared:04/10/17 Analyzed:04/11/17 <br /> Arsenic ND 0.2 mg/L <br /> Lead ND 0.2 11 <br /> LCS(A[D0072-BSI) Prepared:04/10/17 Analyzed:04/11/17 <br /> Arsenic 20.1 0.2 mg/L 20.0 100 80-120 <br /> Lead 17.7 0.2 20.0 88.6 80-120 <br /> LCS Dup(A[D0072-BSD1) Prepared:04/10/17 Analyzed:04/11/17 <br /> Arsenic 20.0 0.2 mg/L 20.0 100 80-120 0.150 25 <br /> Lead 17.7 0.2 20.0 88.4 80-120 0.282 25 <br /> Matrix Spike(A[D0072-MS1) Source:1703216-01 Prepared:04/10/17 Analyzed:04/11/17 <br /> Arsenic 20.0 0.2 mg/L 20.0 0.0634 99.7 75-125 <br /> Lead 18.0 0.2 20.0 ND 89.8 75-125 <br /> Matrix Spike Dup(A[D0072-MSD1) Source:1703216-01 Prepared:04/10/17 Analyzed:04/11/17 <br /> Arsenic 19.9 0.2 mg/L 20.0 0.0634 99.0 75-125 0.652 25 <br /> Lead 17.8 0.2 11 20.0 ND 89.2 75-125 0.614 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 10 of 11 <br />