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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 />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 />Cold Vapor Extraction EPA 7470/7471 - Quality Control <br />SunStar Laboratories, Inc. <br />Reporting Spike Source %REC RPD <br />Analyte Result MDL Limit Units Level Result %REC Limits RPD Limit Notes <br />Batch 7050141 - EPA 7471A Soil <br />Blank (7050141-BLKI) Prepared: 05/01/17 Analyzed: 05/04/17 <br />Mercury ND 0.027 0.10 mg/kg <br />LCS (7050141-BS1) Prepared: 05/01/17 Analyzed: 05/04/17 <br />Mercury 0.382 0.027 0.10 mg/kg 0.397 96.4 75-125 <br />Matrix Spike (7050141 -MSI) Source: T171074-06 Prepared: 05/01/17 Analyzed: 05/04/17 <br />Mercury 0.310 0.027 0.10 mg/kg 0.410 ND 75.7 75-125 <br />Matrix Spike Dup (7050141-MSD1) Source: T171074-06 Prepared: 05/01/17 Analyzed: 05/04/17 <br />Mercmy 0.287 0.027 0.10 mg/kg 0.385 ND 74.7 75-125 7.79 20 QR -04 <br />Batch 7050212 - EPA 7470A Water <br />Blank (7050212-BLKI) Prepared: 05/02/17 Analyzed: 05/03/17 <br />Mercury ND 0.022 0.50 ug/I <br />LCS (7050212 -BSI) Prepared: 05/02/17 Analyzed: 05/03/17 <br />Mercury 4.30 0.022 0.50 ug/1 5.00 86.0 75-125 <br />LCS Dup (7050212-BSDI) Prepared: 05/02/17 Analyzed: 05/03/17 <br />Mercury 4.56 0.022 0.50 ug/1 5.00 91.3 75-125 5.96 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 79 of 94 <br />