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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 05/17/18 18:09 <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\E0144-EPA 6010B <br /> Matrix Spike Dup(A\E0144-MSD1) Source:1804163-01 Prepared&Analyzed:05/17/18 <br /> Antimony 20.5 2.0 mg/L 20.0 0.060 102 75-125 0.00 25 <br /> Arsenic 21.0 0.2 20.0 ND 105 75-125 0.143 25 <br /> Barium 21.5 0.4 20.0 2.18 96.7 75-125 0.559 25 <br /> Beryllium 19.6 0.1 20.0 0.002 97.8 75-125 0.00 25 <br /> Cadmium 19.9 0.2 20.0 0.004 99.5 75-125 0.00 25 <br /> Chromium 19.4 0.2 20.0 0.147 96.5 75-125 0.0515 25 <br /> Cobalt 19.0 1.0 20.0 0.163 94.4 75-125 0.0525 25 <br /> Copper 19.8 0.4 20.0 1.68 90.5 75-125 0.101 25 <br /> Lead 18.2 0.2 20.0 ND 91.2 75-125 0.164 25 <br /> Molybdenum 20.2 0.2 20.0 0.080 100 75-125 0.199 25 <br /> Nickel 18.9 0.2 20.0 0.199 93.6 75-125 0.00 25 <br /> Selenium 21.4 0.4 20.0 ND 107 75-125 0.468 25 <br /> Silver 18.6 0.4 20.0 0.0007 92.9 75-125 0.269 25 <br /> Thallium 17.4 0.4 20.0 ND 87.2 75-125 0.401 25 <br /> Vanadium 19.0 0.4 20.0 0.254 93.5 75-125 0.0527 25 <br /> Zinc 20.0 0.4 20.0 0.466 97.7 75-125 0.250 25 <br /> Batch A\E0147-EPA 7470A <br /> Blank(A\E0147-BLKI) Prepared&Analyzed:05/17/18 <br /> Mercury 0.000400 0.000200 mg/L B-03 <br /> LCS(A\E0147-BS1) Prepared&Analyzed:05/17/18 <br /> Mercury 0.0331 0.000200 mg/L 0.0400 82.8 75-120 <br /> LCS Dup(A\E0147-BSD1) Prepared&Analyzed:05/17/18 <br /> Mercury 0.0312 0.000200 mg/L 0.0400 78.0 75-120 5.97 20 <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 12 of 16 <br />