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Excelchem Environmental Labs <br /> DTE Stockton,LLC Project: Ash <br /> 2526 W.Washington St. Project Number: 4701052861 Date Reported: <br /> Stockton,CA 95203 Project Manager: Dan Crawford 11/16/17 18:06 <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[K0120-EPA 6010B <br /> Blank(A[K0120-BLK1) Prepared: 11/15/17 Analyzed: 11/16/17 <br /> Arsenic ND 1.0 mg/kg <br /> Lead ND 1.0 " <br /> LCS(A[K0120-BS1) Prepared: 11/15/17 Analyzed:11/16/17 <br /> Arsenic 91.7 1.0 mg/kg 100 91.7 80-120 <br /> Lead 93.2 1.0 100 93.2 80-120 <br /> LCS Dup(A[K0120-BSD1) Prepared:11/15/17 Analyzed:11/16/17 <br /> Arsenic 93.8 1.0 mg/kg 100 93.8 80-120 2.32 25 <br /> Lead 95.7 1.0 100 95.7 80-120 2.66 25 <br /> Matrix Spike(A[K0120-MS1) Source:1711082-01 Prepared: 11/15/17 Analyzed: 11/16/17 <br /> Arsenic 121 1.0 mg/kg 100 29.8 91.2 75-125 <br /> Lead 121 1.0 100 45.6 75.4 75-125 <br /> Matrix Spike Dup(A[K0120-MSD1) Source:1711082-01 Prepared: 11/15/17 Analyzed:11/16/17 <br /> Arsenic 170 1.0 mg/kg 100 29.8 140 75-125 33.6 25 QM-11 <br /> Lead 155 1.0 " 100 45.6 109 75-125 24.6 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 />