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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 %REC Limits RPD Limit Notes <br />Batch A[D0186 - EPA 6010B <br />97.9 <br />1.0 <br />mg/kg 100 <br />LCS (A[D0186-BSI) <br />80-120 <br />2.05 25 <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 />LO <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 />1.0 <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-BSD1) <br />100 <br />96.9 <br />Prepared: 04/24/17 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 />t00 <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 />100 <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 />Thallium <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 />9R.5 <br />2.0 <br />100 <br />98.5 <br />80-120 <br />2.83 25 <br />Excelchem Environmental Lab. The results In this report apply to rhe somples analyzed in accordance with the chain of <br />custody doaanent. This analytical report must he reproduced in its entirely. <br />Laboratory Representative <br />Page 5 of 7 <br />