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1534 Willow Pass Road,Pittsburg,CA 94565-1701 <br /> McCampbell Analytical, Inc. Toll Free Telephone:(877)252-9262/Fax:(925)252-9269 <br /> �i "When Quality Counts" http://www.mccampbell.com/E-mail:main@mccampbell.com <br /> Quality Control Report <br /> Client: Terracon WorkOrder: 2007F84 <br /> Date Prepared: 08/04/2020-08/05/2020 BatchID: 203248 <br /> Date Analyzed: 08/04/2020-08/05/2020 Extraction Method: E524.3 <br /> Instrument: GC45 Analytical Method: E524.3 <br /> Matrix: Drinking Water Unit: µg/L <br /> Project: NA207060; Shipherd Property Sample ID: MB/LCS/LCSD-203248 <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 0.979 1 98 70-130 <br /> 4-BFB 1.00 1 100 70-130 <br /> 1,2-dichlorobenzene-d4 1.07 1 107 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 0.104 0.0939 0.10 103 94 70-130 9.70 20 <br /> 1,2-Dibromoethane(EDB) 0.101 0.0944 0.10 101 94 70-130 7.14 20 <br /> Surrogate Recovery <br /> tert-Butyl methyl ether-d3 1.12 1.08 1 112 108 70-130 3.53 20 <br /> 4-BFB 1.00 1.01 1 100 101 70-130 0.405 20 <br /> 1,2-dichlorobenzene-d4 1.04 1.04 1 104 104 70-130 0.145 20 <br /> CA ELAP 1644 <br /> Page 6 of 10 <br />