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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 /> Total Recoverable Metals-Quality Control <br /> Reporting Spike Source %REC RPD <br /> Analyte Result Limit Units Level Result %REC Limits RPD Limit Notes <br /> Batch A[B0097-EPA 6010B <br /> Blank(A[B0097-BLKI) Prepared&Analyzed:02/10/17 <br /> Arsenic ND 1.0 mg/kg <br /> Lead ND 1.0 " <br /> LCS(A[B0097-BS1) Prepared&Analyzed:02/10/17 <br /> Arsenic 91.6 1.0 mg/kg 100 91.6 80-120 <br /> Lead 94.4 1.0 100 94.4 80-120 <br /> LCS Dup(A[B0097-BSD1) Prepared&Analyzed:02/10/17 <br /> Arsenic 95.1 1.0 mg/kg 100 95.1 80-120 3.72 25 <br /> Lead 97.9 1.0 100 97.9 80-120 3.63 25 <br /> Matrix Spike(A[B0097-MS1) Source: 1702008-02 Prepared&Analyzed:02/10/17 <br /> Arsenic 114 1.0 mg/kg 100 26.4 87.0 75-125 <br /> Lead 84.2 1.0 100 2.74 81.5 75-125 <br /> Matrix Spike Dup(A[B0097-MSD1) Source:1702008-02 Prepared&Analyzed:02/10/17 <br /> Arsenic 113 1.0 mg/kg 100 26.4 86.6 75-125 0.353 25 <br /> Lead 86.6 1.0 " 100 2.74 83.9 75-125 2.74 25 <br /> EXcelchenl 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 5 of <br />