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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 17:33 <br /> STLC Analysis-Quality Control <br /> Reporting Spike Source %REC RPD <br /> Analyte Result Limit Units Level Result %REC Limits RPD Limit Notes <br /> Batch A[K0076-EPA 6010B <br /> Blank(A[K0076-BLK1) Prepared&Analyzed: 11/10/17 <br /> Arsenic ND 0.2 mg/L <br /> Lead ND 0.2 " <br /> LCS(A[K0076-BS1) Prepared&Analyzed:11/10/17 <br /> Arsenic 20.2 0.2 mg/L 20.0 101 80-120 <br /> Lead 20.4 0.2 20.0 102 80-120 <br /> LCS Dup(A[K0076-BSD1) Prepared&Analyzed: 11/10/17 <br /> Arsenic 23.2 0.2 mg/L 20.0 116 80-120 14.0 25 <br /> Lead 23.5 0.2 20.0 117 80-120 13.9 25 <br /> Matrix Spike(A[K0076-MS1) Source:1711042-01 Prepared&Analyzed: 11/10/17 <br /> Arsenic 22.7 0.2 mg/L 20.0 2.03 103 75-125 <br /> Lead 18.6 0.2 20.0 0.0662 92.4 75-125 <br /> Matrix Spike Dup(A[K0076-MSD1) Source:1711042-01 Prepared&Analyzed:11/10/17 <br /> Arsenic 22.9 0.2 mg/L 20.0 2.03 104 75-125 0.832 25 <br /> Lead 18.6 0.2 " 20.0 0.0662 92.5 75-125 0.0539 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 14 of 16 <br />