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-AS McCampbell Analytical, Inc. <br />"When Quality Counts" <br />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 <br /> <br />Quality Control Report <br />Client: Atlas Technical Consultants <br />Date Prepared: 02/18/2021 <br />Date Analyzed: 02/18/2021 <br />Instrument: GC18 <br />Matrix: Soil <br />Project: 91-57962-PW; FUHSD <br />WorkOrder: 2102A42 <br />BatchID: 215583 <br />Extraction Method: 5W5030B <br />Analytical Method: SW8260B <br />Unit: mg/kg <br />Sample ID: MB/LCS/LCSD-215583 <br />QC Summary Report for SW8260B <br />Analyte MB <br />Result <br />MDL RL SPK <br />Val <br />MB SS <br />% R EC <br />MB SS <br />Limits <br />Surrogate Recovery <br />Dibromofluoromethane 0.126 0.125 101 70-140 <br />Toluene-d8 0.145 0.125 116 70-140 <br />4-BFB 0.0131 0.0125 104 70-140 <br />Benzene-d6 0.0910 0.1 91 70-140 <br />Ethylbenzene-d10 0.115 0.1 115 70-140 <br />1,2-DCB-d4 0.0766 0.1 77 70-140 <br />(Cont.) <br />CA ELAP 1644 • NELAP 40330RELAP <br />Page 47 of 68