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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 03/21/17 13:41 <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[C0146-EPA 6010B <br /> Blank(A[C0146-BLK1) Prepared:03/17/17 Analyzed:03/20/17 <br /> Arsenic ND 0.2 mg/L <br /> Lead ND 0.2 " <br /> LCS(A[C0146-BSI) Prepared:03/17/17 Analyzed:03/20/17 <br /> Arsenic 40.7 0.2 mg/L 40.0 102 80-120 <br /> Lead 37.4 0.2 40.0 93.5 80-120 <br /> LCS Dup(A[C0146-BSD1) Prepared:03/17/17 Analyzed:03/20/17 <br /> Arsenic 41.1 0.2 mg/L 40.0 103 80-120 0.880 25 <br /> Lead 37.8 0.2 40.0 94.4 80-120 1.01 25 <br /> Matrix Spike(A[C0146-MS1) Source:1703030-01 Prepared:03/17/17 Analyzed:03/20/17 <br /> Arsenic 42.6 0.2 mg/L 40.0 0.308 106 75-125 <br /> Lead 36.5 0.2 40.0 0.181 90.9 75-125 <br /> Matrix Spike Dup(A[C0146-MSD1) Source:1703030-01 Prepared:03/17/17 Analyzed:03/20/17 <br /> Arsenic 41.3 0.2 mg/L 40.0 0.308 103 75-125 2.96 25 <br /> Lead 35.4 0.2 " 40.0 0.181 88.1 75-125 3.06 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 />