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Excelchem Environmental Labs <br /> DTE Stockton,LLC Project: Ash <br /> 2526 W.Washington St. Project Number: #4701065871 Date Reported: <br /> Stockton,CA 95203 Project Manager: Dan Crawford 02/22/17 09:13 <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[B0136-EPA 6010B <br /> Blank(A[B0136-BLKI) Prepared:02/14/17 Analyzed:02/15/17 <br /> Arsenic ND 0.2 mg/L <br /> Lead ND 0.2 11 <br /> LCS(A[B0136-BS1) Prepared:02/14/17 Analyzed:02/15/17 <br /> Arsenic 20.9 0.2 mg/L 20.0 105 80-120 <br /> Lead 18.8 0.2 20.0 94.0 80-120 <br /> LCS Dup(A[B0136-BSD1) Prepared:02/14/17 Analyzed:02/15/17 <br /> Arsenic 21.1 0.2 mg/L 20.0 106 80-120 0.856 25 <br /> Lead 19.0 0.2 20.0 94.8 80-120 0.848 25 <br /> Matrix Spike(A[B0136-MS1) Source: 1702046-02 Prepared:02/14/17 Analyzed:02/15/17 <br /> Arsenic 22.0 0.2 mg/L 20.0 0.361 108 75-125 <br /> Lead 18.4 0.2 20.0 ND 92.0 75-125 <br /> Matrix Spike Dup(A[B0136-MSD1) Source:1702046-02 Prepared:02/14/17 Analyzed:02/15/17 <br /> Arsenic 22.2 0.2 mg/L 20.0 0.361 109 75-125 0.815 25 <br /> Lead 18.3 0.2 11 20.0 ND 91.6 75-125 0.381 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 6 of <br />