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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.mccampbell.com/E-mail:main@mccampbell.com <br /> Quality Control Report <br /> Client: AdvancedGeo,Inc. WorkOrder: 2106I07 <br /> Date Prepared: 07/13/2021 BatchlD: 225414 <br /> Date Analyzed: 07/13/2021 Extraction Method: E524.3 <br /> Instrument: GC45 Analytical Method: E524.3 <br /> Matrix: Drinking Water Unit: µg/L <br /> Project: Telander Property Sample ID: MB/LCS/LCSD-225414 <br /> QC Summary Report for E524.3 <br /> Analyte MB MDL RL SPK MB SS MB SS <br /> Result Val %REC Limits <br /> 1,2-Dibromo-3-chloropropane ND 0.00630 0.0100 - - <br /> Surrogate Recovery <br /> tert-Butyl methyl ether-d3 1.42 1 142,F3 70-130 <br /> 4-BFB 0.939 - --- -- 1 94 70-130 <br /> 1,2-dichlorobenzene-d4 1.10 1 110 70-130 <br /> Analyte LCS LCSD SPK LCS LCSD LCS/LCSD RPD RPD <br /> Result Result Val %REC %REC Limits Limit <br /> 1,2-Dibromo-3-chloropropane 0.0968 0.110 0.10 97 109 70-130 12.3 20 <br /> Surrogate Recovery <br /> tert-Butyl methyl ether-d3 0.836 1.06 1 84 106 70-130 23.3,F3 20 <br /> 4-BFB 0.935 0.948 1 93 95 70-130 1.39 20 <br /> 12-dichlorobenzene-d4 1.06 1.07 1 106 107 70-130 0.895 20 <br /> CA ELAP 1644 <br /> Page 7 of 11 <br />