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Excelchem Environmental Labs <br /> DTE Stockton,LLC Project: Ash <br /> 2526 W.Washington St. Project Number: #4701180998 Date Reported: <br /> Stockton,CA 95203 Project Manager: Dan Crawford 02/21/18 17:33 <br /> STLC Metals-Quality Control <br /> Reporting Spike Source %REC RPD <br /> Analyte Result Limit Units Level Result %REC Limits RPD Limit Notes <br /> Batch A\B0220-EPA 7470A <br /> Blank(A\B0220-BLK1) Prepared&Analyzed:02/21/18 <br /> Mercury ND 0.0120 mg/L <br /> LCS(A\B0220-BS1) Prepared&Analyzed:02/21/18 <br /> Mercury 0.170 0.0120 mg/L 0.200 84.8 75-120 <br /> LCS Dup(A\B0220-BSD1) Prepared&Analyzed:02/21/18 <br /> Mercury 0.174 0.0120 mg/L 0.200 87.2 75-120 2.79 20 <br /> Matrix Spike(A\B0220-MS1) Source:1802144-01 Prepared&Analyzed:02/21/18 <br /> Mercury 0.169 0.0120 mg/L 0.200 0.00512 81.8 75-125 <br /> Matrix Spike Dup(A\B0220-MSD1) Source:1802144-01 Prepared&Analyzed:02/21/18 <br /> Mercury 0.170 0.0120 mg/L 0.200 0.00512 82.2 75-125 0.473 20 <br /> Batch A\B0223-EPA 6010B <br /> Blank(A\B0223-BLK1) Prepared&Analyzed:02/21/18 <br /> Antimony ND 2.0 mg/L <br /> Arsenic ND 0.2 <br /> Barium ND 0.4 <br /> Beryllium ND 0.1 <br /> Cadmium ND 0.2 <br /> Chromium ND 0.2 <br /> Cobalt ND 1.0 <br /> Copper ND 0.4 <br /> Lead ND 0.2 <br /> Molybdenum ND 0.2 <br /> Nickel ND 0.2 <br /> Selenium ND 0.4 <br /> Silver ND 0.4 <br /> Thallium ND 0.4 <br /> Vanadium ND 0.4 <br /> Zinc ND 0.4 <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 10 of 15 <br />