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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 11/10/17 17:23 <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[K0061-EPA 6010B <br /> Blank(A[K0061-BLK1) Prepared: 11/08/17 Analyzed: 11/09/17 <br /> Arsenic ND 1.0 mg/kg <br /> Lead ND 1.0 " <br /> LCS(A[K0061-BS1) Prepared: 11/08/17 Analyzed:11/09/17 <br /> Arsenic 96.0 1.0 mg/kg 100 96.0 80-120 <br /> Lead 96.8 1.0 100 96.8 80-120 <br /> LCS Dup(A[K0061-BSD1) Prepared:11/08/17 Analyzed:11/09/17 <br /> Arsenic 96.6 1.0 mg/kg 100 96.6 80-120 0.602 25 <br /> Lead 97.4 1.0 100 97.4 80-120 0.618 25 <br /> Matrix Spike(A[K0061-MS1) Source:1711018-21 Prepared: 11/08/17 Analyzed: 11/09/17 <br /> Arsenic 93.2 1.0 mg/kg 100 ND 93.2 75-125 <br /> Lead 93.1 1.0 100 0.900 92.2 75-125 <br /> Matrix Spike Dup(A[K0061-MSD1) Source:1711018-21 Prepared: 11/08/17 Analyzed:11/09/17 <br /> Arsenic 95.6 1.0 mg/kg 100 ND 95.6 75-125 2.52 25 <br /> Lead 93.1 1.0 " 100 0.900 92.2 75-125 0.0430 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 />