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Excelchem Environmental Labs <br /> DTE Stockton,LLC Project: Ash <br /> 2526 W.Washington St. Project Number: #4701180998 Date Reported: <br /> Stockton,CA 95203 Project Manager: Dan Crawford 05/23/18 17:16 <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\E0208-EPA 6010B <br /> Blank(A\E0208-BLK1) Prepared&Analyzed:05/23/18 <br /> Arsenic ND 1.0 mg/kg <br /> Lead ND 1.0 " <br /> LCS(A\E0208-BS1) Prepared&Analyzed:05/23/18 <br /> Arsenic 95.8 1.0 mg/kg 100 95.8 80-120 <br /> Lead 96.3 1.0 100 96.3 80-120 <br /> LCS Dup(A\E0208-BSD1) Prepared&Analyzed:05/23/18 <br /> Arsenic 97.7 1.0 mg/kg 100 97.7 80-120 1.97 25 <br /> Lead 98.6 1.0 100 98.6 80-120 2.40 25 <br /> Matrix Spike(A\E0208-MS1) Source:1805138-01 Prepared&Analyzed:05/23/18 <br /> Arsenic 126 1.0 mg/kg 100 25.4 100 75-125 <br /> Lead 124 1.0 100 43.6 80.2 75-125 <br /> Matrix Spike Dup(A\E0208-MSD1) Source:1805138-01 Prepared&Analyzed:05/23/18 <br /> Arsenic 122 1.0 mg/kg 100 25.4 96.4 75-125 3.23 25 <br /> Lead 123 1.0 " 100 43.6 79.5 75-125 0.567 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 6 of 8 <br />