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Excelchem Environmental Labs <br /> DTE Stockton,LLC Project: Ash <br /> 2526 W.Washington St. Project Number: [none] Date Reported: <br /> Stockton,CA 95203 Project Manager: Dan Crawford 05/16/18 18:05 <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\E0121-EPA 7471A <br /> Blank(A\E0121-BLK1) Prepared&Analyzed:05/15/18 <br /> Mercury ND 0.016 mg/kg <br /> LCS(A\E0121-BS1) Prepared&Analyzed:05/15/18 <br /> Mercury 0.170 0.016 mg/kg 0.200 84.8 80-120 <br /> LCS Dup(A\E0121-BSD1) Prepared&Analyzed:05/15/18 <br /> Mercury 0.174 0.016 mg/kg 0.200 86.8 80-120 2.33 20 <br /> Matrix Spike(A\E0121-MS1) Source:1805087-01 Prepared&Analyzed:05/15/18 <br /> Mercury 0.190 0.016 mg/kg 0.200 0.00792 91.2 75-125 <br /> Matrix Spike Dup(A\E0121-MSD1) Source:1805087-01 Prepared&Analyzed:05/15/18 <br /> Mercury 0.190 0.016 mg/kg 0.200 0.00792 91.2 75-125 0.00 20 <br /> Batch A\E0127-EPA 6010B <br /> Blank(A\E0127-BLK1) Prepared:05/15/18 Analyzed:05/16/18 <br /> Antimony ND 1.0 mg/kg <br /> Arsenic ND 1.0 <br /> Arsenic ND 1.0 <br /> Barium ND 2.0 <br /> Beryllium ND 0.5 <br /> Cadmium ND 1.0 <br /> Chromium ND 1.0 <br /> Cobalt ND 5.0 <br /> Copper ND 2.0 <br /> Lead ND 1.0 <br /> Molybdenum ND 1.0 <br /> Lead ND 1.0 <br /> Nickel ND 1.0 <br /> Selenium ND 2.0 <br /> Silver ND 1.0 <br /> Thallium ND 2.0 <br /> Vanadium ND 2.0 <br /> Zinc ND 2.0 <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 10 <br />