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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 11/10/17 17:33 <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[K0076-EPA 6010B <br /> LCS Dup(A[K0076-BSD1) Prepared&Analyzed: 11/10/17 <br /> Antimony 23.7 2.0 mg/L 20.0 118 80-120 13.7 25 <br /> Arsenic 23.2 0.2 20.0 116 80-120 14.0 25 <br /> Barium 19.9 0.4 20.0 99.6 80-120 0.756 25 <br /> Beryllium 22.9 0.1 20.0 115 80-120 14.0 25 <br /> Cadmium 23.4 0.2 20.0 117 80-120 14.3 25 <br /> Chromium 23.0 0.2 20.0 115 80-120 13.9 25 <br /> Cobalt 23.6 1.0 20.0 118 80-120 14.0 25 <br /> Copper 23.2 0.4 20.0 116 80-120 14.4 25 <br /> Lead 23.5 0.2 20.0 117 80-120 13.9 25 <br /> Molybdenum 22.8 0.2 20.0 114 80-120 14.2 25 <br /> Nickel 23.1 0.2 20.0 115 80-120 13.7 25 <br /> Selenium 23.3 0.4 20.0 116 80-120 13.4 25 <br /> Silver 20.1 0.4 20.0 101 80-120 1.91 25 <br /> Thallium 23.8 0.4 20.0 119 80-120 14.5 25 <br /> Vanadium 23.0 0.4 20.0 115 80-120 14.4 25 <br /> Zinc 23.2 0.4 20.0 116 80-120 14.0 25 <br /> Matrix Spike(A[K0076-MS1) Source:1711042-01 Prepared&Analyzed: 11/10/17 <br /> Antimony 20.2 2.0 mg/L 20.0 0.161 100 75-125 <br /> Arsenic 22.7 0.2 20.0 2.03 103 75-125 <br /> Barium 20.9 0.4 20.0 1.49 97.0 75-125 <br /> Beryllium 19.4 0.1 20.0 0.003 97.2 75-125 <br /> Cadmium 19.7 0.2 20.0 0.041 98.1 75-125 <br /> Chromium 19.7 0.2 20.0 0.607 95.4 75-125 <br /> Cobalt 19.1 1.0 20.0 0.054 95.1 75-125 <br /> Copper 19.5 0.4 20.0 1.82 88.6 75-125 <br /> Lead 18.6 0.2 20.0 0.066 92.4 75-125 <br /> Molybdenum 19.6 0.2 20.0 0.158 97.0 75-125 <br /> Nickel 18.7 0.2 20.0 0.263 92.0 75-125 <br /> Selenium 19.9 0.4 20.0 0.006 99.7 75-125 <br /> Silver 18.4 0.4 20.0 0.003 91.9 75-125 <br /> Thallium 17.6 0.4 20.0 ND 87.8 75-125 <br /> Vanadium 18.7 0.4 20.0 0.153 92.6 75-125 <br /> Zinc 30.7 0.4 20.0 10.9 99.1 75-125 <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 />