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Excelchem Environmental Labs <br />Ramos Environmental Project: BORETECH <br />1515 S. River Rd. Project Number: [none] Date Reported: <br />West Sacramento, CA 95691 Project Manager: David Hendricks 04/28/17 14:47 <br />Total Recoverable Metals - Quality Control <br />Reporting Spike Smuce %REC RPD <br />Analytc Result Limit Units Level Result %REC Limits RPD Limit Notes <br />Batch A[D0186 - EPA 6010B <br />LCS(A[D0186-BSI) <br />Prepared: 04/24/17 Analyzed: 04/25/17 <br />Antimony <br />95.9 <br />1.0 <br />mg/kg 100 95.9 80.120 <br />Arsenic <br />97.3 <br />1.0 <br />100 97.3 80.120 <br />Barium <br />103 <br />2.0 <br />100 103 80.120 <br />Beryllium <br />99.7 <br />0.5 <br />100 99.7 80-120 <br />Cadmium <br />100 <br />1.0 <br />100 100 80-120 <br />Chromium <br />102 <br />1.0 <br />100 102 80-120 <br />Cobalt <br />104 <br />5.0 <br />100 104 80-120 <br />Copper <br />101 <br />2.0 <br />100 101 80-120 <br />Lead <br />96.0 <br />1.0 <br />100 96.0 80-120 <br />Molybdenum <br />100 <br />1.0 <br />100 100 80-120 <br />Nickel <br />95.1 <br />LO <br />100 95.1 80-120 <br />Selenium <br />88.8 <br />2.0 <br />100 88.8 80-120 <br />Silver <br />97.0 <br />1.0 <br />100 97.0 80-120 <br />Thallium <br />103 <br />2.0 <br />100 103 80-120 <br />Vanadium <br />102 <br />2.0 <br />100 102 80-120 <br />Zinc <br />95.7 <br />2.0 <br />100 95.7 80-120 <br />LCS Dup (A[D0186-BSDI) <br />Prepared: 04/24/17 Analyzed`. 04/25/17 <br />Antimony <br />97.9 <br />1.0 <br />mg/kg 100 97.9 80-120 <br />2.05 <br />25 <br />Arsenic <br />99.2 <br />1.0 <br />100 99.2 80-120 <br />1.96 <br />25 <br />Barium <br />106 <br />2.0 <br />100 106 80-120 <br />2.39 <br />25 <br />Beryllium <br />102 <br />0.5 <br />t0o 102 80-120 <br />2.15 <br />25 <br />Cadmium <br />103 <br />1.0 <br />100 103 80-120 <br />2.07 <br />25 <br />Chromium <br />104 <br />LO <br />100 104 80-120 <br />2.24 <br />25 <br />Cobalt <br />106 <br />5.0 <br />100 106 80-120 <br />2.18 <br />25 <br />Copper <br />104 <br />2.0 <br />100 104 80-120 <br />3.02 <br />25 <br />Lead <br />97.7 <br />1.0 <br />100 97.7 80-120 <br />1.80 <br />25 <br />Molybdenum <br />103 <br />1.0 <br />100 103 80-120 <br />2.26 <br />25 <br />Nickel <br />96.9 <br />1.0 <br />100 96.9 80-120 <br />1.85 <br />25 <br />Selenium <br />90.4 <br />2.0 <br />100 90.4 80-120 <br />1.76 <br />25 <br />Silver <br />99.7 <br />l.0 <br />100 99.7 80-120 <br />2.74 <br />25 <br />Thallimn <br />106 <br />2.0 <br />100 106 80-120 <br />2.01 <br />25 <br />Vanadium <br />106 <br />2.0 <br />100 106 80-120 <br />2.98 <br />25 <br />7ine <br />98.5 <br />2.0 <br />100 98.5 80-120 <br />2.83 <br />25 <br />EXeelchem Environmental Lab. The testdts in this report apply to the samples analyzed in accordance with the chain of <br />custody docranent. This analytical report must he reproduced in its entirety. <br />Laboratory Representative <br />Page 5 of 7 <br />