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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:03/05/2025 <br />Date Prepared:03/05/2025 <br />WorkOrder:2502J06 <br />BatchID:312764 <br />Analytical Method:SW8021B <br />Unit:µg/L <br />Sample ID:MB/LCS/LCSD-312764 <br />Instrument:GC7 <br />Matrix:Water <br />Extraction Method:SW5030B <br />QC Summary Report for SW8021B <br />Analyte MB <br />Result <br />MDL RL SPK <br />Val <br />MB IS/SS <br />%REC <br />MB IS/SS <br />Limits <br />Benzene ND 0.085 0.50 --- <br />Toluene ND 0.32 0.50 --- <br />Ethylbenzene ND 0.091 0.50 --- <br />m,p-Xylene ND 0.16 1.0 --- <br />o-Xylene ND 0.093 0.50 --- <br />Surrogate Recovery <br />aaa-TFT 9.8 10 98 70-120 <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 />Benzene 9.8 9.6 10 98 96 80-120 2.32 20 <br />Toluene 10 10 10 102 103 80-120 0.638 20 <br />Ethylbenzene 11 11 10 107 106 80-120 0.750 20 <br />m,p-Xylene 21 21 20 105 104 80-120 0.857 20 <br />o-Xylene 11 11 10 109 108 80-120 1.11 20 <br />Surrogate Recovery <br />aaa-TFT 9.9 9.6 10 99 96 70-120 2.72 20 <br />CA ELAP 1644 • NELAP 4033ORELAP <br />Page 25 of 34