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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: 21061391 <br /> Date Prepared: 07/02/2021 BatchID: 224784 <br /> Date Analyzed: 07/02/2021 Extraction Method: E524.3 <br /> Instrument: GC45 Analytical Method: E524.3 <br /> Matrix: Drinking Water Unit: µg/L <br /> Project: SSS/NLS-Hibbart Road Sample ID: MB/LCS/LCSD-224784 <br /> 2106B91-001AMS/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 0.00630 0.0100 - - <br /> 1,2-Dibromoethane(EDB) ND 0.0150 0.0200 - - - <br /> Surrogate Recovery <br /> tert-Butyl methyl ether-d3 0.838 1 84 70-130 <br /> 4-BFB 0.927 1 93 70-130 <br /> 1,2-dichlorobenzene-d4 1.08 1 108 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 0.0466 0.0371 0.10 47,F2 37,F2 70-130 22.8,F2 20 <br /> 1,2-Dibromoethane(EDB) 0.0754 0.0669 0.10 75 67,F2 70-130 12.0 20 <br /> Surrogate Recovery <br /> tert-Butyl methyl ether-d3 1.19 0.880 1 119 88 70-130 30.2,F3 20 <br /> 4-BFB 0.899 0.913 1 90 91 70-130 1.59 20 <br /> 1,2-dichlorobenzene-d4 1.09 1.08 1 109 108 70-130 0.956 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 0.0359 0.0472 0.10 ND 36,F1 47,F1 70-130 27.1 30 <br /> Surrogate Recovery <br /> tert-Butyl methyl ether-d3 1 0.820 1.31 1 82 131,F3 70-130 46.3,F3 30 <br /> 4-BFB 1 0.926 0.910 1 93 91 70-130 1.74 30 <br /> 1,2-dichlorobenzene-d4 1 1.08 1.08 1 108 108 70-130 0.203 30 <br /> CA ELAP 1644 <br /> Page 7 of 11 <br />