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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 05/24/18 11:08 <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\E0204-EPA 7470A <br /> Blank(A\E0204-BLK1) Prepared&Analyzed:05/23/18 <br /> Mercury ND 0.0120 mg/L <br /> LCS(A\E0204-BS1) Prepared&Analyzed:05/23/18 <br /> Mercury 0.171 0.0120 mg/L 0.200 85.6 75-120 <br /> LCS Dup(A\E0204-BSD1) Prepared&Analyzed:05/23/18 <br /> Mercury 0.173 0.0120 mg/L 0.200 86.4 75-120 0.930 20 <br /> Matrix Spike(A\E0204-MS1) Source:1805138-01 Prepared&Analyzed:05/23/18 <br /> Mercury 0.157 0.0120 mg/L 0.200 ND 78.4 75-125 <br /> Matrix Spike Dup(A\E0204-MSD1) Source:1805138-01 Prepared&Analyzed:05/23/18 <br /> Mercury 0.152 0.0120 mg/L 0.200 ND 76.0 75-125 3.11 20 <br /> Batch AT0209-EPA 6010B <br /> Blank(A\E0209-BLK1) Prepared&Analyzed:05/23/18 <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 />