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Excelchem Environmental Labs <br /> DTE Stockton,LLC Project: Ash <br /> 2526 W.Washington St. Project Number: 4701052861 Date Reported: <br /> Stockton,CA 95203 Project Manager: Dan Crawford 11/13/17 17:56 <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[K0084-EPA 7470A <br /> Blank(A[K0084-BLK1) Prepared&Analyzed: 11/13/17 <br /> Mercury ND 0.000200 mg/L <br /> LCS(A[K0084-BS1) Prepared&Analyzed: 11/13/17 <br /> Mercury 0.00303 0.000200 mg/L 0.00333 90.8 75-120 <br /> LCS Dup(A[K0084-BSD1) Prepared&Analyzed: 11/13/17 <br /> Mercury 0.00309 0.000200 mg/L 0.00333 92.8 75-120 2.18 20 <br /> Matrix Spike(A[K0084-MS1) Source:1711039-01 Prepared&Analyzed: 11/13/17 <br /> Mercury 0.00283 0.000200 mg/L 0.00333 8.53E-5 82.2 75-125 <br /> Matrix Spike Dup(A[K0084-MSD1) Source:1711039-01 Prepared&Analyzed: 11/13/17 <br /> Mercury 0.00287 0.000200 mg/L 0.00333 8.53E-5 83.4 75-125 1.41 20 <br /> Batch A[K0086-EPA 6010B <br /> Blank(A[K0086-BLK1) Prepared&Analyzed: 11/13/17 <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 />