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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:Clean Harbors <br />Project:Turner Cut <br />Date Analyzed:02/27/2025 <br />Date Prepared:02/26/2025 <br />WorkOrder:2502J06 <br />BatchID:312128 <br />Analytical Method:E200.8 <br />Unit:µg/L <br />Sample ID:MB/LCS/LCSD-312128 <br />Instrument:ICP-MS4 <br />Matrix:Water <br />Extraction Method:E200.8 <br />QC Report for Metals (>1% Sediment Content) <br />Analyte MB <br />Result <br />MDL RL SPK <br />Val <br />MB IS/SS <br />%REC <br />MB IS/SS <br />Limits <br />Antimony ND 0.54 2.5 --- <br />Arsenic ND 0.42 2.5 --- <br />Barium ND 3.4 25 --- <br />Beryllium ND 0.27 2.5 --- <br />Cadmium ND 0.24 2.5 --- <br />Chromium ND 1.3 2.5 --- <br />Cobalt ND 0.21 2.5 --- <br />Copper ND 1.1 2.5 --- <br />Lead ND 0.66 2.5 --- <br />Molybdenum ND 0.48 2.5 --- <br />Nickel ND 0.93 2.5 --- <br />Selenium ND 1.2 2.5 --- <br />Silver ND 0.30 2.5 --- <br />Thallium ND 0.22 2.5 --- <br />Vanadium ND 0.51 2.5 --- <br />Zinc ND 9.2 25 --- <br />Surrogate Recovery <br />Terbium 2700 2500 107 70-130 <br />CA ELAP 1644 • NELAP 4033ORELAP <br />(Cont.) <br />Page 26 of 34