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Excelchem Environmental Labs <br /> DTE Stockton,LLC Project: Ash <br /> 2526 W.Washington St. Project Number: #7401180998 Date Reported: <br /> Stockton,CA 95203 Project Manager: Dan Crawford 05/17/18 18:30 <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\E0129-EPA 6010B <br /> Blank(A\E0129-BLK1) Prepared&Analyzed:05/16/18 <br /> Arsenic ND 1.0 mg/kg <br /> Lead ND 1.0 " <br /> LCS(A\E0129-BS1) Prepared&Analyzed:05/16/18 <br /> Arsenic 96.2 1.0 mg/kg 100 96.2 80-120 <br /> Lead 98.7 1.0 100 98.7 80-120 <br /> LCS Dup(A\E0129-BSD1) Prepared&Analyzed:05/16/18 <br /> Arsenic 96.0 1.0 mg/kg 100 96.0 80-120 0.198 25 <br /> Lead 99.0 1.0 100 99.0 80-120 0.374 25 <br /> Matrix Spike(A\E0129-MS1) Source:1805096-01 Prepared&Analyzed:05/16/18 <br /> Arsenic 111 1.0 mg/kg 100 11.2 99.8 75-125 <br /> Lead 109 1.0 100 26.4 82.9 75-125 <br /> Matrix Spike Dup(A\E0129-MSD1) Source:1805096-01 Prepared&Analyzed:05/16/18 <br /> Arsenic 110 1.0 mg/kg 100 11.2 98.6 75-125 1.09 25 <br /> Lead 112 1.0 " 100 26.4 86.0 75-125 2.80 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 <br />