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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 />04/23/18 10:35Roseville 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 6010B - Quality Control <br />SunStar Laboratories, Inc. <br />Batch 8041623 - EPA 3050B <br />Blank (8041623-BLK1)Prepared & Analyzed: 04/16/18 <br />Antimony mg/kgND3.0 <br />Silver "ND 2.0 <br />Arsenic "ND 5.0 <br />Barium "ND 1.0 <br />Beryllium "ND 1.0 <br />Cadmium "ND 2.0 <br />Chromium "ND 2.0 <br />Cobalt "ND 2.0 <br />Copper "ND 1.0 <br />Lead "ND 3.0 <br />Molybdenum "ND 5.0 <br />Nickel "ND 2.0 <br />Selenium "ND 5.0 <br />Thallium "ND 2.0 <br />Vanadium "ND 5.0 <br />Zinc "ND 1.0 <br />LCS (8041623-BS1)Prepared & Analyzed: 04/16/18 <br />Arsenic mg/kg92.9 5.0 100 75-12592.9 <br />Barium "91.6 1.0 100 75-12591.6 <br />Cadmium "88.7 2.0 100 75-12588.7 <br />Chromium "90.3 2.0 100 75-12590.3 <br />Lead "96.9 3.0 100 75-12596.9 <br />Matrix Spike (8041623-MS1)Prepared & Analyzed: 04/16/18 Source: T181256-01 <br />Arsenic mg/kg88.5 5.0 100 1.81 75-12586.7 <br />Barium "119 1.0 100 37.7 75-12581.1 <br />Cadmium "83.2 2.0 100 0.425 75-12582.8 <br />Chromium "89.3 2.0 100 5.37 75-12584.0 <br />Lead "93.3 3.0 100 ND 75-12593.3 <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 21 of 29