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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 01/25/17 18:05 <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[A0073-EPA 6010B <br /> Blank(A[A0073-BLK1) Prepared:01/10/17 Analyzed:01/13/17 <br /> Arsenic ND 0.2 mg/L <br /> Lead ND 0.2 11 <br /> LCS(A[A0073-BSI) Prepared:01/10/17 Analyzed:01/13/17 <br /> Arsenic 21.6 0.2 mg/L 20.0 108 80-120 <br /> Lead 18.8 0.2 20.0 93.8 80-120 <br /> LCS Dup(A[A0073-BSD1) Prepared:01/10/17 Analyzed:01/13/17 <br /> Arsenic 21.6 0.2 mg/L 20.0 108 80-120 0.232 25 <br /> Lead 18.8 0.2 20.0 93.8 80-120 0.0533 25 <br /> Matrix Spike(A[A0073-MS1) Source:1701014-02 Prepared:01/10/17 Analyzed:01/13/17 <br /> Arsenic 21.8 0.2 mg/L 20.0 0.722 106 75-125 <br /> Lead 18.2 0.2 20.0 0.202 89.9 75-125 <br /> Matrix Spike Dup(A[A0073-MSD1) Source:1701014-02 Prepared:01/10/17 Analyzed:01/13/17 <br /> Arsenic 22.2 0.2 mg/L 20.0 0.722 107 75-125 1.45 25 <br /> Lead 18.3 0.2 11 20.0 0.202 90.4 75-125 0.494 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 12 of 13 <br />