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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 />ReLimit porting Spike Source %REC RPD <br />Analyte Result Units Level Result %REC Limits RPD Limit Notes <br />Batch A[D0165 - EPA 7471A <br />ND <br />1.0 mg/kg <br />Arsenic <br />ND <br />Blank (A[D0165-BLK1) <br />Barium <br />ND <br />2.0 ' <br />Prepared & Analyzed: 04/24/17 <br />Mercury <br />ND <br />0.016 <br />mg/kg <br />1.0 " <br />LCS (AID0165-BSI) <br />ND <br />1.0 " <br />Cobalt <br />Prepared & Analyzed: 04/24/17 <br />Mercury <br />0.319 <br />0.016 <br />mg/kg <br />0.400 79.8 80-120 QR -04 <br />LCS Dup (A[D0165-BSD1) <br />LO " <br />Molybdenum <br />ND <br />Prepared & Analyzed: 04/24/17 <br />Mercury <br />0.330 <br />0.016 <br />mg/kg <br />0.400 82.6 80-120 3.45 20 <br />Matrix Spike (A[D0165-MSI) <br />Silver <br />Source: 1704114-01 <br />1.0 " <br />Prepared & Analyzed: 04/24/17 <br />Mercury <br />0.318 <br />0.160 <br />mg/kg <br />0.400 0.000160 79.6 75-125 <br />Matrix Spike Dup (A[D0165-MSD1) <br />ND <br />Source: 1704114-01 <br />Prepared & Analyzed: 04/24/17 <br />Mercury <br />0.319 <br />0.160 <br />mg/kg <br />0.400 0.000160 79.8 75-125 0.251 20 <br />Batch A[DO186 - EPA 6010B <br />Blank (A[D0186-BLKI) <br />Prepared: 04/24/17 Analyzed: 04/25/17 <br />Antimony <br />ND <br />1.0 mg/kg <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 />LO " <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 ERvironnnental Lab. The results in this report apply to the samples analyzed to accordance with the chain of <br />/ custody document. Als analytical report must he reproduced in its entirety. <br />Laboratory Representative Page 4 of 7 <br />