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Excelchem Laboratories,Inc. <br /> DTE Stockton,LLC Project: 2020 Annual Bottom Ash Profiling <br /> 2526 W.Washington St. Project Number: 4700995195 Date Reported: <br /> Stockton,CA 95203 Project Manager: Genny Huffinan 04/10/20 21:23 <br /> TCLP Analysis-Quality Control <br /> Reporting Spike Source %REC RPD <br /> Analyte Result Limit Units Level Result %REC Limits RPD Limit Notes <br /> Batch AAD0073-EPA 6010B <br /> Blank(AAD0073-BLK1) Prepared&Analyzed:04/10/20 <br /> Lead ND 0.2 mg/L <br /> LCS(A A D0073-BS1) Prepared&Analyzed:04/10/20 <br /> Lead 19.2 0.2 mg/L 20.0 95.9 80-120 <br /> LCS Dup(AAD0073-BSDl) Prepared&Analyzed:04/10/20 <br /> Lead 19.3 0.2 m9/1- 20.0 96.3 80-120 0.416 25 <br /> Matrix Spike(AAD0073-MS1) Source:2004043-01 Prepared&Analyzed:04/10/20 <br /> Lead 19.3 0.2 mg/L 20.0 ND 96.6 75-125 <br /> Matrix Spike Dup(AAD0073-MSD1) Source:2004043-01 Prepared&Analyzed:04/10/20 <br /> Lead 19.5 0.2 mg/L 20.0 ND 97.4 75-125 0.825 25 <br /> Excelchem Laboratories.Tnc. 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 17 of 19 <br />