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SunStar <br />Laboratories, Inc. <br />PROVIDING QUALITY ANALYTICAL SERVICES NATIONWIDE <br />25712 Commercentre Drive <br />Lake Forest, California 92630 <br />949.297.5020 Phone <br />949.297.5027 Fax <br />Pangea Environmental Services, Inc. Project: 324 E. 11th <br />1710 Franklin Street, Suite 200 Project Number: [none] Reported: <br />Oakland CA, 94612 Project Manager: Elizabeth Avery 03/21/17 15:38 <br />Metals by EPA 6010B - Quality Control <br />SunStar Laboratories, Inc. <br />Reporting Spike Source %REC RPD <br />malyte Result MDL Limit Units Level Result %REC Limits RPD Limit Notes <br />Batch 7022029 - EPA 3051 <br />Matrix Spike (7022029 -MSI) <br />Source: T170418-01 <br />Prepared: 02/20/17 Analyzed: 02/22/17 <br />Prepared: 03/14/17 Analyzed: 03/15/17 <br />Arsenic <br />Lead <br />89.2 <br />3.0 mg/kg <br />97.1 1.79 90.0 75-125 <br />Chromium <br />ND <br />Matrix Spike Dup (7022029-MSD1) <br />" <br />Source: T170418-01 <br />Prepared: 02/20/17 Analyzed: 02/22/17 <br />Arsenic <br />84.8 <br />5.0 mg/kg <br />98.0 1.02 85.5 75-125 <br />1.65 <br />20 <br />Barium <br />188 <br />1.0 <br />98.0 105 84.8 75-125 <br />4.73 <br />20 <br />Cadmium <br />88.3 <br />2.0 <br />98.0 0.024 90.0 75-125 <br />1.63 <br />20 <br />Chromium <br />94.1 <br />2.0 <br />98.0 7.01 88.8 75-125 <br />1.25 <br />20 <br />Lead <br />88.7 <br />3.0 <br />98.0 1.79 88.7 75-125 <br />0.526 <br />20 <br />Batch 7031405 - EPA 3051 <br />Blank (7031405-BLK1) <br />Prepared: 03/14/17 Analyzed: 03/15/17 <br />Arsenic <br />ND <br />0.0080 5.0 <br />mg/kg <br />Chromium <br />ND <br />0.0012 2.0 <br />" <br />LCS (7031405-BS1) <br />Prepared: 03/14/17 Analyzed: 03/15/17 <br />Arsenic <br />100 <br />0.0080 5.0 <br />mg/kg <br />100 100 75-125 <br />Chromium <br />95.4 <br />0.0012 2.0 <br />100 95.4 75-125 <br />Matrix Spike (7031405-MS1) <br />Source: T170605-01 <br />Prepared: 03/14/17 Analyzed: 03/15/17 <br />Arsenic <br />86.2 <br />0.0080 5.0 <br />mg/kg <br />94.3 1.43 89.9 75-125 <br />Chromium <br />89.2 <br />0.0012 2.0 <br />94.3 7.02 87.1 75-125 <br />Matrix Spike Dup (7031405-MSD1) <br />Source: T170605-01 <br />Prepared: 03/14/17 Analyzed: 03/15/17 <br />Arsenic <br />93.7 <br />0.0080 5.0 <br />mg/kg <br />100 1.43 92.2 75-125 8.26 20 <br />Chromium <br />98.4 <br />0.0012 2.0 <br />" <br />100 7.02 91.4 75-125 9.84 20 <br />SunStar Laboratories, Inc. <br />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 />Page 14 of 27 <br />