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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 02/19/18 19:14 <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\B0196-EPA 6010B <br /> Blank(A\B0196-BLK1) Prepared&Analyzed:02/19/18 <br /> Arsenic ND 0.2 mg/L <br /> Lead ND 0.2 " <br /> LCS(A\B0196-BS1) Prepared&Analyzed:02/19/18 <br /> Arsenic 21.1 0.2 mg/L 20.0 105 80-120 <br /> Lead 20.8 0.2 20.0 104 80-120 <br /> LCS Dup(A\B0196-BSD1) Prepared&Analyzed:02/19/18 <br /> Arsenic 20.8 0.2 mg/L 20.0 104 80-120 1.58 25 <br /> Lead 20.5 0.2 20.0 103 80-120 1.21 25 <br /> Matrix Spike(A\B0196-MS1) Source:1802125-01 Prepared&Analyzed:02/19/18 <br /> Arsenic 22.3 0.2 mg/L 20.0 0.0910 111 75-125 <br /> Lead 18.5 0.2 20.0 0.0142 92.5 75-125 <br /> Matrix Spike Dup(A\B0196-MSD1) Source:1802125-01 Prepared&Analyzed:02/19/18 <br /> Arsenic 22.6 0.2 mg/L 20.0 0.0910 113 75-125 1.60 25 <br /> Lead 18.8 0.2 " 20.0 0.0142 93.8 75-125 1.45 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 14 of 16 <br />