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SunStar 25712 Commercentre Drive <br /> Laboratories, Inc. Lake Forest,California 92630 <br /> 949.297.5020 Phone <br /> PROVIDING QUALITY ANALYTICAL SERVICES KATiONWIDE <br /> 949.297.5027 Fax <br /> Brusca Associates Inc. Project: Lathrop 48-Ac Property <br /> PO Box 332 Project Number: 137-002 Reported: <br /> Roseville CA,95661 Project Manager: Joe Brusca, 04/27/18 11:10 <br /> Metals by EPA 6020 Method-Quality Control <br /> SunStar Laboratories, Inc. <br /> Reporting Spike Source °/uREC RPD <br /> Analyte Result Limit Units Level Result °/oREC Limits RPD Limit Notes <br /> Batch 8042318-STLC Metals <br /> Blank(8042318-BLKI) Prepared:04/23/18 Analyzed:04/26/18 <br /> Antimony ND 1.0 ug/I <br /> Arsenic ND LO " <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-BSI) Prepared:04/23/18 Analyzed:04/26/18 <br /> Arsenic 57.4 1.0 ug/I 50.0 115 80-120 <br /> Barium 56.4 1.0 50.0 113 80-120 <br /> Cadmium 56.5 1.0 50.0 113 80-120 <br /> Chromium 55.6 1.0 50.0 111 80-120 <br /> Lead 56.2 2.0 50.0 112 80-120 <br /> Duplicate(8042318-DUP1) Source:T181179-06 Prepared:04/23/18 Analyzed:04/26/18 <br /> Barium 548 5.0 ug/I 521 4.95 200 <br /> Chromium 54.5 5.0 " 53.8 1.28 200 <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 he reproduced in its entirely. <br /> Mike Jaroudi,Project Manager Page 7 of 9 <br />