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; j 1534 Willow Pass Road,Pittsburg,CA 94565-1701 <br /> F` M c C a m p b e I I Analytical, Inc. Toll Free Telephone:(877)252-9262/Fax:(925)252-9269 <br /> "When Quality Counts" http://www.mccampbeU.com/E-mail:main@mccampbell.com <br /> Quality Control Report <br /> Client: Terracon WorkOrder: 1910A50 <br /> Date Prepared: 10/27/19- 10/28/19 BatchID: 187785 <br /> Date Analyzed: 10/27/19- 10/28/19 Extraction Method: E524.3 <br /> Instrument: GC45 Analytical Method: E524.3 <br /> Matrix: Drinking Water Unit: µg/L <br /> Project: NA197081;Gribaudo Property Sample ID: MB/LCS/LCSD-187785 <br /> 1910A50-001BMS/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 0.0077 0.010 - - <br /> Surrogate Recovery <br /> tert-Butyl methyl ether-d3 1.1 1 107 70-130 <br /> 4-BFB 0.94 1 94 70-130 <br /> 1,2-dichlorobenzene-d4 1.1 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 0.093 0.087 0.10 93 87 70-130 6.81 20 <br /> Surrogate Recovery <br /> tert-Butyl methyl ether-d3 1.0 0.98 1 100 98 70-130 1.79 20 <br /> 4-BFB 0.94 0.93 1 94 93 70-130 0.811 20 <br /> 1,2-dichlorobenzene-l4 1.1 1.1 1 106 106 70-130 0 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 0.26 0.26 0.10 0.18 82 80 70-130 1.01 30 <br /> Surrogate Recovery <br /> tert-Butyl methyl ether-d3 1 1.0 1.0 1 101 101 70-130 0 30 <br /> 4-BFB 1 0.95 0.95 1 95 95 70-130 0 30 <br /> 1,2-dichlorobenzene-d4 1 1.1 1.1 1 110 110 70-130 0 30 <br /> (Cont.) <br /> CA ELAP 1644 <br /> Page 7 of 12 <br />