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dO McCampbell Analytical, Inc. <br />"When Quality Counts" <br />1534 Willow Pass Road, Pittsburg, CA 94565-1701 <br />Toll Free Telephone: (877) 252-9262 / Fax: (925) 252-9269 <br />http://www.mccampbell.com / E-mail: main@mecampbell.com <br /> <br />Quality Control Report <br />Client: Pctralogix WorkOrder: 2104A52 <br />Date Prepared: 04/21/2021 BatchID: 220005 <br />Date Analyzed: 04/21/2021 Extraction Method: E524.3 <br />Instrument: GC45 Analytical Method: E524.3 <br />Matrix: Drinking Water Unit: <br />Project: NLS/SSS <br /> Sample ID: MB/LCS/LCSD-220005 <br />2104A52-001AMS/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 />Surrogate Recovery <br />tert-Butyl methyl ether-d3 0.980 1 98 70-130 <br />4-BFB 0.961 1 96 70-130 <br />1,2-dichlorobenzene-d4 0.977 1 98 70-130 <br />Analyte LCS <br />Result <br />LCSD <br />Result <br />SPK <br />Val <br />LCS <br />%REC <br />LCSD <br />%REC <br />LCS/LCSD <br />Limits <br />RPD RPD <br />Limit <br />1,2-Dibromo-3-chloropropane 0.0847 0.0716 0.10 85 72 70-130 16.8 20 <br />Surrogate Recovery <br />tert-Butyl methyl ether-d3 <br />4-BFB <br />1.10 <br />0.966 <br />0.979 1 110 <br />97 <br />98 <br />97 <br />70-130 <br />70-130 <br />11.4 20 <br />0.966 1 0.0157 20 <br />1,2-dichlorobenzene-d4 0.958 0.972 1 96 97 70-130 1.37 20 <br />Analyte MS <br />OF <br />MS <br />Result <br />MSD <br />Result <br />SPK <br />Val <br />SPKRef <br />Val <br />MS <br />%REC <br />MSD <br />%REC <br />MS/MSD <br />Limits <br />RPD RPD <br />Limit <br />1,2-Dibromo-3-chloropropane 1 0.0799 0.0641 0.10 ND 80 64,F1 70-130 21.9 30 <br />Surrogate Recovery <br />tert-Butyl methyl ether-d3 1 1.04 0.878 1 104 88 70-130 17.2 30 <br />4-BFB 1 0.988 0.961 1 99 96 70-130 2.74 30 <br />1,2-dichlorobenzene-d4 1 1.03 1.03 1 102 103 70-130 0.486 30 <br />CA ELAP 1644 <br />Page 7 of 11