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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 08/14/17 17:46 <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[H0115-EPA 7471A <br /> Blank(A[H0115-BLK1) Prepared:08/10/17 Analyzed:08/11/17 <br /> Mercury ND 0.016 mg/kg <br /> LCS(A[H0115-BSI) Prepared:08/10/17 Analyzed:08/11/17 <br /> Mercury 0.192 0.016 mg/kg 0.200 96.0 80-120 <br /> LCS Dup(A[H0115-BSD1) Prepared:08/10/17 Analyzed:08/11/17 <br /> Mercury 0.194 0.016 mg/kg 0.200 97.2 80-120 1.24 20 <br /> Matrix Spike(A[H0115-MS1) Source:1708079-01 Prepared:08/10/17 Analyzed:08/11/17 <br /> Mercury 0.202 0.016 mg/kg 0.200 0.00152 100 75-125 <br /> Matrix Spike Dup(A[H0115-MSD1) Source:1708079-01 Prepared:08/10/17 Analyzed:08/11/17 <br /> Mercury 0.189 0.016 mg/kg 0.200 0.00152 93.6 75-125 6.56 20 <br /> Batch A[H0118-EPA 6010B <br /> Blank(A[H0118-BLK1) Prepared:08/10/17 Analyzed:08/11/17 <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 /> Nickel ND 1.0 <br /> Lead 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 7 of 15 <br />