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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 /> 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\E0188-EPA 7471A <br /> Blank(A\E0188-BLK1) Prepared:05/21/18 Analyzed:05/22/18 <br /> Mercury ND 0.016 mg/kg <br /> LCS(A\E0188-BS1) Prepared:05/21/18 Analyzed:05/22/18 <br /> Mercury 0.172 0.016 mg/kg 0.200 86.0 80-120 <br /> LCS Dup(A\E0188-BSD1) Prepared:05/21/18 Analyzed:05/22/18 <br /> Mercury 0.179 0.016 mg/kg 0.200 89.6 80-120 4.10 20 <br /> Matrix Spike(A\E0188-MS1) Source:1805138-01 Prepared:05/21/18 Analyzed:05/22/18 <br /> Mercury 0.177 0.016 mg/kg 0.200 0.0214 77.7 75-125 <br /> Matrix Spike Dup(A\E0188-MSD1) Source:1805138-01 Prepared:05/21/18 Analyzed:05/22/18 <br /> Mercury 0.170 0.016 mg/kg 0.200 0.0214 74.5 75-125 3.69 20 QM-01 <br /> Batch A\E0208-EPA 6010B <br /> Blank(A\E0208-BLK1) Prepared&Analyzed:05/23/18 <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 7 of 15 <br />