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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 03/08/17 14:02 <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[C0019-EPA 6010B <br /> Blank(A[C0019-BLK1) Prepared:03/03/17 Analyzed:03/06/17 <br /> Arsenic ND 0.2 mg/L <br /> Lead ND 0.2 11 <br /> LCS(A[C0019-BSI) Prepared:03/03/17 Analyzed:03/06/17 <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[C0019-BSD1) Prepared:03/03/17 Analyzed:03/06/17 <br /> Arsenic 21.2 0.2 mg/L 20.0 106 80-120 0.283 25 <br /> Lead 19.7 0.2 20.0 98.6 80-120 0.405 25 <br /> Matrix Spike(A[C0019-MS1) Source:1702025-04 Prepared:03/03/17 Analyzed:03/06/17 <br /> Arsenic 21.1 0.2 mg/L 20.0 0.0293 105 75-125 <br /> Lead 18.8 0.2 20.0 0.00570 94.2 75-125 <br /> Matrix Spike Dup(A[C0019-MSD1) Source:1702025-04 Prepared:03/03/17 Analyzed:03/06/17 <br /> Arsenic 21.0 0.2 mg/L 20.0 0.0293 105 75-125 0.285 25 <br /> Lead 18.9 0.2 11 20.0 0.00570 94.3 75-125 0.159 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 />