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SunStar <br />PROVLaboratories, Inc. <br />IDING QUALITY ANALYTICAL SERVICES NATIONWIDE <br />25712 Commercentre Drive <br />Lake Forest, California 92630 <br />949.297.5020 Phone <br />949.297.5027 Fax <br />Brusca Associates Inc. Project: Lathrop 48 Acre Property <br />PO Box 332 Project Number: 137-002 Reported: <br />Roseville CA, 95661 Project Manager: Joe Brusca 05/16/17 12:00 <br />Metals by EPA 6010B - Quality Control <br />SunStar Laboratories, Inc. <br />Reporting Spike Source %REC RPD <br />Analyte Result MDL Limit Units Level Result °/uREC Limits RPD Limit Notes <br />Batch 7050140 - EPA 3051 <br />Blank (7050140-BLK1) <br />Prepared: 05/01/17 Analyzed: 05/04/17 <br />Antimony <br />ND <br />0.014 <br />3.0 <br />mg/kg <br />Silver <br />ND <br />0.005 <br />2.0 <br />" <br />Arsenic <br />ND <br />0.008 <br />5.0 <br />" <br />Barium <br />ND <br />0.003 <br />1.0 <br />" <br />Beryllium <br />ND <br />0.002 <br />1.0 <br />" <br />Cadmium <br />ND <br />0.001 <br />2.0 <br />" <br />Chromium <br />ND <br />0.001 <br />2.0 <br />" <br />Cobalt <br />ND <br />0.002 <br />2.0 <br />" <br />Copper <br />ND <br />0.002 <br />1.0 <br />" <br />Lead <br />ND <br />0.010 <br />3.0 <br />" <br />Molybdenum <br />ND <br />0.002 <br />5.0 <br />" <br />Nickel <br />ND <br />0.003 <br />2.0 <br />" <br />Selenium <br />ND <br />0.022 <br />5.0 <br />Thallium <br />ND <br />0.017 <br />2.0 <br />" <br />Vanadium <br />ND <br />0.003 <br />5.0 <br />" <br />Zinc <br />ND <br />0.001 <br />1.0 <br />" <br />LCS (7050140 -BSI) <br />Prepared: 05/01/17 Analyzed: 05/04/17 <br />Arsenic <br />120 <br />0.008 <br />5.0 <br />mg/kg <br />100 120 75-125 <br />Barium <br />122 <br />0.003 <br />1.0 <br />100 122 75-125 <br />Cadmium <br />120 <br />0.001 <br />2.0 <br />100 120 75-125 <br />Chromium <br />122 <br />0.001 <br />2.0 <br />100 122 75-125 <br />Lead <br />122 <br />0.010 <br />3.0 <br />100 122 75-125 <br />Matrix Spike (7050140 -MSI) <br />Source: T171074-06 <br />Prepared: 05/01/17 Analyzed: 05/04/17 <br />Arsenic <br />107 <br />0.008 <br />5.0 <br />mg/kg <br />94.3 ND 114 75-125 <br />Barium <br />183 <br />0.003 <br />LO <br />94.3 79.6 109 75-125 <br />Cadmium <br />100 <br />0.001 <br />2.0 <br />94.3 ND 106 75-125 <br />Chromium <br />108 <br />0.001 <br />2.0 <br />94.3 5.14 109 75-125 <br />SunStar Laboratories, Inc. 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 entirely. <br />Gl� <br />Page 76 of 94 <br />