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Excelchem Environmental Labs <br /> DTE Stockton,LLC Project: Bottom Ash Truck 1 Q3 Testing <br /> 2526 W.Washington St. Project Number: 4701180998 Date Reported: <br /> Stockton,CA 95203 Project Manager: Genny Huffman 09/17/18 19:07 <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\I0093-EPA 6010B <br /> Blank(A\I0093-BLK1) Prepared&Analyzed:09/17/18 <br /> Arsenic ND 0.2 mg/L <br /> Copper ND 0.4 <br /> Lead ND 0.2 <br /> LCS(A\10093-BSI) Prepared&Analyzed:09/17/18 <br /> Arsenic 19.9 0.2 mg/L 20.0 99.4 80-120 <br /> Copper 20.0 0.4 20.0 99.8 80-120 <br /> Lead 19.6 0.2 20.0 98.2 80-120 <br /> LCS Dup(A\10093-BSD1) Prepared&Analyzed:09/17/18 <br /> Arsenic 19.8 0.2 mg/L 20.0 99.0 80-120 0.454 25 <br /> Copper 19.9 0.4 20.0 99.6 80-120 0.150 25 <br /> Lead 19.5 0.2 20.0 97.6 80-120 0.613 25 <br /> Matrix Spike(A\10093-MS1) Source:1809034-05 Prepared&Analyzed:09/17/18 <br /> Arsenic 21.4 0.2 mg/L 20.0 ND 107 75-125 <br /> Copper 19.1 0.4 20.0 0.0686 95.1 80-120 <br /> Lead 18.4 0.2 20.0 0.339 90.5 75-125 <br /> Matrix Spike Dup(A\10093-MSD1) Source:1809034-05 Prepared&Analyzed:09/17/18 <br /> Arsenic 21.6 0.2 mg/L 20.0 ND 108 75-125 0.698 25 <br /> Copper 19.3 0.4 20.0 0.0686 96.3 80-120 1.20 25 <br /> Lead 18.6 0.2 20.0 0.339 91.3 75-125 0.864 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 15 of 17 <br />