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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 Source %REC RPD <br />Analyte Result Limit Units Level Result .RFC <br />Limits RPD Limit Notes <br />Batch A[D0186 - EPA 6010B <br />LCS (A[D0186-BS1) Prepared: 04/24/17 Analyzed: 04/25/17 <br />Antimony <br />95.9 <br />1.0 <br />mg/kg 100 <br />95.9 <br />80-120 <br />Arsenic <br />97.3 <br />1.0 <br />100 <br />97.3 <br />80-120 <br />Barium <br />103 <br />2.0 <br />100 <br />103 <br />80-120 <br />Beryllium <br />99.7 <br />0.5 <br />100 <br />99.7 <br />80-120 <br />Cadmium <br />100 <br />1.0 <br />100 <br />100 <br />80-120 <br />Chromium <br />102 <br />1.0 <br />100 <br />102 <br />80-120 <br />Cobalt <br />104 <br />5.0 <br />100 <br />104 <br />80-120 <br />Copper <br />101 <br />2.0 <br />100 <br />101 <br />80-120 <br />Lead <br />96.0 <br />1.0 <br />100 <br />96.0 <br />80-120 <br />Molybdenum <br />100 <br />1.0 <br />loo <br />100 <br />80-120 <br />Nickel <br />95.1 <br />1.0 <br />100 <br />95.1 <br />80-120 <br />Selenium <br />88.8 <br />2.0 <br />100 <br />88.8 <br />80-120 <br />Silver <br />97.0 <br />1.0 <br />100 <br />97.0 <br />80-120 <br />Thallium <br />103 <br />2.0 <br />100 <br />103 <br />80-120 <br />Vanadium <br />102 <br />2.0 <br />100 <br />102 <br />80-120 <br />Zinc <br />95.7 <br />2.0 <br />100 <br />95.7 <br />80-120 <br />LCS Dup (A[D0186-BSD1) <br />Prepared' 04124/17 <br />Analyzed, 04/25/17 <br />Antimony <br />97.9 <br />1.0 <br />mg/kg 100 <br />97.9 <br />80-120 <br />2.05 25 <br />Arsenic <br />99.2 <br />1.0 <br />100 <br />99.2 <br />80-120 <br />1.96 25 <br />Barium <br />106 <br />2.0 <br />100 <br />106 <br />80-120 <br />2.39 25 <br />Beryllium <br />102 <br />0.5 <br />100 <br />102 <br />80-120 <br />2.15 25 <br />Cadmium <br />103 <br />1.0 <br />100 <br />103 <br />80-120 <br />2.07 25 <br />Chromium <br />104 <br />1.0 <br />100 <br />104 <br />80-120 <br />2.24 25 <br />Cobalt <br />106 <br />5.0 <br />100 <br />106 <br />80-120 <br />2.18 25 <br />Copper <br />104 <br />2.0 <br />loo <br />104 <br />80-120 <br />3.02 25 <br />Lead <br />97.7 <br />1.0 <br />100 <br />97.7 <br />80-120 <br />1.80 25 <br />Molybdenum <br />103 <br />1.0 <br />100 <br />103 <br />80-120 <br />2.26 25 <br />Nickel <br />96.9 <br />1.0 <br />100 <br />96.9 <br />80-120 <br />1.85 25 <br />Selenium <br />90.4 <br />2.0 <br />100 <br />90.4 <br />80-120 <br />1.76 25 <br />Silver <br />99.7 <br />1.0 <br />100 <br />99.7 <br />80-120 <br />2.74 25 <br />Thallimn <br />106 <br />2.0 <br />100 <br />106 <br />80-120 <br />2.01 25 <br />Vanadium <br />106 <br />2.0 <br />100 <br />106 <br />80-120 <br />2.98 25 <br />Zinc <br />98.5 <br />2.0 <br />100 <br />98.5 <br />80-120 <br />2.83 25 <br />EXeelehem 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 5 of7 <br />