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l 1534 Willow Pass Road,Pittsburg,CA 94565-1701 <br /> M c C a m p b e I l Analytic al, Inc. Toll Free Telephone:(877)252-9262/Fax:(925)252-9269 <br /> ,%at "When Quality Countsrr http://www.mccanTbell.com/E-mail:main@mccmVbell.com <br /> Quality Control Report <br /> Client: Petralogix WorkOrder: 2109270 <br /> Date Prepared: 09/10/2021 BatchID: 229419 <br /> Date Analyzed: 09/10/2021 Extraction Method: E524.3 <br /> Instrument: GC45 Analytical Method: E524.3 <br /> Matrix: Drinking Water Unit: µg/L <br /> Project: SSS/NLS-S Koster Road Sample ID: MB/LCS/LCSD-229419 <br /> 2109270-00IAMS/MSD <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 0.00840 0.0100 - - <br /> 1,2-Dibromoethane(EDB) ND 0.0150 0.0200 - - - <br /> Surrogate Recovery <br /> tert-Butyl methyl ether-d3 0.605 1 60,F3 70-130 <br /> 4-BFB 1.00 1 100 70-130 <br /> 1,2-dichlorobenzene-d4 1.04 1 105 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 0.0771 0.0941 0.10 77 94 70-130 19.9 20 <br /> 1,2-Dibromoethane(EDB) 0.132 0.138 0.10 132,F2 138,F2 70-130 4.66 20 <br /> Surrogate Recovery <br /> tert-Butyl methyl ether-d3 0.595 1.11 1 60,F3 111 70-130 60.5,F3 20 <br /> 4-BFB 1.06 1.03 1 106 103 70-130 2.87 20 <br /> 1,2-dichlorobenzene-d4 0.984 1.01 1 98 101 70-130 2.41 20 <br /> Analyte MS MS MSD SPK SPKRef MS MSD MS/MSD RPD RPD <br /> DF Result Result Val Val %REC %REC Limits Limit <br /> 1,2-Dibromo-3-chloropropane 1 0.0756 0.0871 0.10 ND 76 87 70-130 14.2 30 <br /> 1,2-Dibromoethane(EDB) 1 0.125 0.130 0.10 ND 125 131,F1 70-130 4.54 30 <br /> Surrogate Recovery <br /> tert-Butyl methyl ether-d3 1 0.564 0.643 1 56,F3 64,F3 70-130 13.0 30 <br /> 4-BFB 1 1.10 1.14 1 110 114 70-130 2.96 30 <br /> 1,2-dichlorobenzene-d4 1 1.05 1.08 1 105 108 70-130 3.15 30 <br /> CA ELAP 1644 <br /> Page 7 of 11 <br />