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Project: <br />Project Number: <br />Project Manager: <br />Reported: <br />Brusca Associates Inc. <br />PO Box 332 137-002 <br />Joe Brusca <br />Lathrop 48-Ac Property <br />04/27/18 11:10Roseville CA, 95661 <br />25712 Commercentre Drive <br />Lake Forest, California 92630 <br />949.297.5020 Phone <br />949.297.5027 Fax <br />Result Limit <br />Reporting <br />Units Level <br />Spike <br />Result <br />Source <br />%REC <br />%REC <br />Limits RPD <br />RPD <br />Limit Notes Analyte <br />Metals by EPA 6020 Method - Quality Control <br />SunStar Laboratories, Inc. <br />Batch 8042318 - STLC Metals <br />Blank (8042318-BLK1)Prepared: 04/23/18 Analyzed: 04/26/18 <br />Antimony ug/lND1.0 <br />Arsenic "ND 1.0 <br />Barium "ND 1.0 <br />Beryllium "ND 1.0 <br />Cadmium "ND 1.0 <br />Chromium "ND 1.0 <br />Cobalt "ND 1.0 <br />Copper "ND 1.0 <br />Lead "ND 2.0 <br />Mercury "ND 0.10 <br />Molybdenum "ND 1.0 <br />Nickel "ND 1.0 <br />Selenium "ND 5.0 <br />Silver "ND 1.0 <br />Thallium "ND 1.0 <br />Vanadium "ND 1.0 <br />Zinc "ND 1.0 <br />LCS (8042318-BS1)Prepared: 04/23/18 Analyzed: 04/26/18 <br />Arsenic ug/l57.4 1.0 50.0 80-120115 <br />Barium "56.4 1.0 50.0 80-120113 <br />Cadmium "56.5 1.0 50.0 80-120113 <br />Chromium "55.6 1.0 50.0 80-120111 <br />Lead "56.2 2.0 50.0 80-120112 <br />Duplicate (8042318-DUP1)Prepared: 04/23/18 Analyzed: 04/26/18 Source: T181179-06 <br />Barium ug/l5485.0 521 2004.95 <br />Chromium "54.5 5.0 53.8 2001.28 <br />Mike Jaroudi, Project Manager <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 entirety . <br />Page 7 of 9