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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 /> "When Quality Counts" http://www.mccampbell.com/E-mail:main@mccampbell.com <br /> Quality Control Report <br /> Client: Terracon WorkOrder: 191OA50 <br /> Date Prepared: 10/28/19 BatchID: 187877 <br /> Date Analyzed: 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-187877 <br /> 1910A50-003BMS/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 0.92 1 92 70-130 <br /> 4-BFB 0.89 1 89 70-130 <br /> 1,2-dichlorobenzene-d4 1.1 1 106 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 0.095 0.097 0.10 95 97 70-130 1.45 20 <br /> Surrogate Recovery <br /> tert-Butyl methyl ether-d3 1.0 1.0 1 104 104 70-130 0 20 <br /> 4-BFB 0.90 0.90 1 90 90 70-130 0 20 <br /> 1,2-dichlorobenzeneA4 1.0 1.0 1 103 105 70-130 2.01 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 /> 12-Dibromo-3-chloropropane 1 0.19 0.19 0.10 0.12 70 71 70-130 0.220 30 <br /> Surrogate Recovery <br /> tert-Butyl methyl ether-d3 1 0.93 0.93 1 93 93 70-130 0 30 <br /> 4-BFB 1 0.94 0.94 1 94 94 70-130 0 30 <br /> 1,2-dichlorobenzene-d4 1 1.1 1.1 1 106 108 70-130 1.37 30 <br /> CA ELAP 1644 <br /> Page 8 of 12 <br />