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1534 Willow Pass Road,Pittsburg,CA 94565-1701 <br /> M c C a m p b e I l Analytical, Inc. Toll Free Telephone:(877)252-9262/Fax:(925)252-9269 <br /> "When Quality Counts" http://www.mccampbefl.com/E-mail:main@mccampbell.com <br /> Quality Control Report <br /> Client: Graben,Inc. WorkOrder: 1905831 <br /> Date Prepared: 5/15/19 BatchID: 177947 <br /> Date Analyzed: 5/16/19 Extraction Method: SW3050B <br /> Instrument: ICP-MSI Analytical Method: SW6020 <br /> Matrix: Soil Unit: mg/Kg <br /> Project: 250 Catalpa Sample ID: MB/LCS/LCSD-177947 <br /> QC Summary Report for Metals <br /> Analyte LCS LCSD SPK LCS LCSD LCS/LCSD RPD RPD <br /> Result Result Val %REC %REC Limits Limit <br /> Antimony 54 54 50 108 108 75-125 0 20 <br /> Arsenic 48 48 50 96 96 75-125 0 20 <br /> Barium 510 510 500 102 101 75-125 0.864 20 <br /> Beryllium 50 50 50 101 101 75-125 0 20 <br /> Cadmium 50 50 50 100 100 75-125 0 20 <br /> Chromium 51 51 50 103 101 75-125 1.39 20 <br /> Cobalt 49 49 50 98 98 75-125 0 20 <br /> Copper 50 50 50 101 100 75-125 0.935 20 <br /> Lead 48 48 50 96 96 75-125 0 20 <br /> Mercury 1.3 1.3 1.25 101 103 75-125 2.51 20 <br /> Molybdenum 50 51 50 101 101 75-125 0 20 <br /> Nickel 50 50 50 101 101 75-125 0 20 <br /> Selenium 50 50 50 101 99 75-125 1.50 20 <br /> Silver 50 50 50 101 100 75-125 0.558 20 <br /> Thallium 47 47 50 95 94 75-125 0.254 20 <br /> Vanadium 50 50 50 100 100 75-125 0 20 <br /> Zinc 510 500 500 101 100 75-125 1.01 20 <br /> Surrogate Recovery <br /> Terbium 560 540 500 112 108 70-130 3.80 20 <br /> CA ELAP 1644•NELAP 4033ORELAP <br /> Page 8 of 14 <br />