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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 />Re nlJng Spike Source %PEC RPD <br />Analyte Result Limit Units Level Result %REC Limits RPD Limit Notes <br />Batcb AID0165 - EPA 7471A <br />Blank (A[D0165-BLKI) Prepared & Analyzed: 04/24/17 <br />Mercury ND 0.016 mg/kg <br />LCS (A[D0165-BSI) Prepared & Analyzed: 04/24/17 <br />Mercury 0.319 0.016 mg/kg 0.400 79.8 80-120 QR -04 <br />LCS Dup (A[D0165-BSD1) Prepared & Analyzed: 04/24/17 <br />Mercury 0.330 0.016 mg/kg 0.400 82.6 80-120 3.45 20 <br />Matrix Spike (A[D0165-MSI) Source: 1704114-01 Prepared & Analyzed: 04/24/17 <br />Mercury 0.318 0.160 mg/kg 0.400 0.000160 79.6 75-125 <br />Matrix Spike Dup (A[D0165-MSDI) Source: 1704114-01 Prepared & Analyzed: 04/24/17 <br />Mercury <br />0.319 <br />0,160 mg/kg 0.400 0.000160 79.8 75-125 0.251 20 <br />Batch A[D0186 - EPA 6010B <br />Blank (A[D0186-BLKI) <br />Prepared: 04/24/17 Analyzed: 04/25/17 <br />Antimony <br />ND <br />1.0 mghg <br />Arsenic <br />ND <br />1.0 " <br />Barium <br />ND <br />2.0 " <br />Beryllium <br />ND <br />0.5 " <br />Cadmium <br />ND <br />1.0 " <br />Chromium <br />ND <br />1.0 " <br />Cobalt <br />ND <br />5.0 " <br />Copper <br />ND <br />2.0 <br />Lead <br />ND <br />1.0 " <br />Molybdenum <br />ND <br />1.0 " <br />Nickel <br />ND <br />1.0 " <br />Selenium <br />ND <br />2.0 " <br />Silver <br />ND <br />1.0 " <br />Thallium <br />ND <br />2.0 " <br />Vanadium <br />ND <br />2.0 " <br />Zinc <br />ND <br />2.0 " <br />EXcelchem Environmental Lail. The results in this report apply to the samples analyzed M acconiance with the chain of <br />custody document. This analytical report must be reproduced in its entirety. <br />Laboratory Representative <br />Page 4 of 7 <br />