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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 17:09 <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\I0086-EPA 6010B <br /> Blank(A\I0086-BLK1) Prepared:09/13/18 Analyzed:09/14/18 <br /> Arsenic ND 0.2 mg/L <br /> Copper ND 0.4 <br /> Lead ND 0.2 <br /> LCS(A\10086-BSI) Prepared:09/13/18 Analyzed:09/14/18 <br /> Arsenic 19.1 0.2 mg/L 20.0 95.4 80-120 <br /> Copper 19.4 0.4 20.0 97.0 80-120 <br /> Lead 19.7 0.2 20.0 98.6 80-120 <br /> LCS Dup(A\10086-BSD1) Prepared:09/13/18 Analyzed:09/14/18 <br /> Arsenic 18.5 0.2 mg/L 20.0 92.6 80-120 2.98 25 <br /> Copper 18.9 0.4 20.0 94.6 80-120 2.56 25 <br /> Lead 19.2 0.2 20.0 95.8 80-120 2.88 25 <br /> Matrix Spike(A\10086-MS1) Source:1809033-01 Prepared:09/13/18 Analyzed:09/14/18 <br /> Arsenic 20.9 0.2 mg/L 20.0 0.0977 104 75-125 <br /> Copper 27.6 0.4 20.0 6.61 105 80-120 <br /> Lead 18.0 0.2 20.0 0.0653 89.6 75-125 <br /> Matrix Spike Dup(A\10086-MSD1) Source:1809033-01 Prepared:09/13/18 Analyzed:09/14/18 <br /> Arsenic 21.1 0.2 mg/L 20.0 0.0977 105 75-125 0.952 25 <br /> Copper 27.9 0.4 20.0 6.61 107 80-120 1.26 25 <br /> Lead 18.2 0.2 20.0 0.0653 90.5 75-125 0.996 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 />