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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 10:43Roseville 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 />LCS (8041623-BS1)Prepared & Analyzed: 04/16/18 <br />Arsenic mg/kg92.9 5.0 100 75-12592.9 <br />Arsenic "92.9 5.0 100 75-12592.9 <br />Barium "91.6 1.0 100 75-12591.6 <br />Barium "91.6 1.0 100 75-12591.6 <br />Cadmium "88.7 2.0 100 75-12588.7 <br />Cadmium "88.7 2.0 100 75-12588.7 <br />Chromium "90.3 2.0 100 75-12590.3 <br />Chromium "90.3 2.0 100 75-12590.3 <br />Lead "96.9 3.0 100 75-12596.9 <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 />Arsenic "88.5 5.0 100 1.81 75-12586.7 <br />Barium "119 1.0 100 37.7 75-12581.1 <br />Barium "119 1.0 100 37.7 75-12581.1 <br />Cadmium "83.2 2.0 100 0.425 75-12582.8 <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 />Chromium "89.3 2.0 100 5.37 75-12584.0 <br />Lead "93.3 3.0 100 ND 75-12593.3 <br />Lead "93.3 3.0 100 6.15 75-12587.1 <br />Matrix Spike Dup (8041623-MSD1)Prepared & Analyzed: 04/16/18 Source: T181256-01 <br />Arsenic mg/kg95.2 5.0 100 1.81 2075-12593.4 7.37 <br />Arsenic "95.2 5.0 100 1.81 2075-12593.4 7.37 <br />Barium "123 1.0 100 37.7 2075-12585.1 3.25 <br />Barium "123 1.0 100 37.7 2075-12585.1 3.25 <br />Cadmium "85.4 2.0 100 0.425 2075-12585.0 2.67 <br />Cadmium "85.4 2.0 100 0.425 2075-12585.0 2.67 <br />Chromium "91.3 2.0 100 5.37 2075-12586.0 2.21 <br />Chromium "91.3 2.0 100 5.37 2075-12586.0 2.21 <br />Lead "99.2 3.0 100 ND 2075-12599.2 6.14 <br />Lead "99.2 3.0 100 6.15 2075-12593.0 6.14 <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 32 of 39