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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 11/13/17 17:59 <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[K0080-EPA 6010B <br /> Blank(A[K0080-BLK1) Prepared: 11/10/17 Analyzed: 11/13/17 <br /> Arsenic ND 1.0 mg/kg <br /> Lead ND 1.0 " <br /> LCS(A[K0080-BS1) Prepared: 11/10/17 Analyzed:11/13/17 <br /> Arsenic 100 1.0 mg/kg 100 100 80-120 <br /> Lead 102 1.0 100 102 80-120 <br /> LCS Dup(A[K0080-BSD1) Prepared:11/10/17 Analyzed:11/13/17 <br /> Arsenic 104 1.0 mg/kg 100 104 80-120 4.30 25 <br /> Lead 106 1.0 100 106 80-120 4.15 25 <br /> Matrix Spike(A[K0080-MS1) Source:1711054-01 Prepared: 11/10/17 Analyzed: 11/13/17 <br /> Arsenic 123 1.0 mg/kg 100 19.0 104 75-125 <br /> Lead 130 1.0 100 42.9 87.4 75-125 <br /> Matrix Spike Dup(A[K0080-MSD1) Source:1711054-01 Prepared: 11/10/17 Analyzed:11/13/17 <br /> Arsenic 113 1.0 mg/kg 100 19.0 94.3 75-125 8.21 25 <br /> Lead 114 1.0 " 100 42.9 71.0 75-125 13.4 25 QM-01 <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 />