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Quality Control Report <br />McCampbell Analytical, Inc.1534 Willow Pass Road, Pittsburg, CA 94565-1701 <br />Toll Free Telephone: (877) 252-9262 / Fax: (925) 252-9269 <br />http://www.mccampbell.com / E-mail: main@mccampbell.com"When Quality Counts" <br />Client:AdvancedGeo, Inc. <br />Project:Pilkington <br />Date Analyzed:02/10/2021 <br />Date Prepared:02/09/2021 <br />WorkOrder:2102062 <br />BatchID:214845 <br />Analytical Method:SW7199 <br />Unit:mg/Kg <br />Sample ID:MB/LCS/LCSD-214845 <br />Instrument:IC2 <br />Matrix:Soil <br />Extraction Method:SW3060A <br />QC Summary Report for SW7199 (Hexavalent chromium) <br />Analyte MB <br />Result <br />MDL RL <br />Hexavalent chromium ND 0.200 0.200 --- <br />Analyte LCS <br />Result <br />LCSD <br />Result <br />SPK <br />Val <br />LCS <br />%REC <br />LCSD <br />%REC <br />LCS/LCSD <br />Limits <br />RPD RPD <br />Limit <br />Hexavalent chromium 4.28 3.86 4 107 97 70-130 10.2,F2 10 <br />CA ELAP 1644 • NELAP 4033ORELAP <br />Page 110 of 154