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Quality Control Report <br />McCampbell Analytical, Inc.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@mccampbell.com"When Quality Counts" <br />Client:Petralogix <br />Project:SSS/NLS - Hibbart Road <br />Date Analyzed:07/02/2021 <br />Date Prepared:07/02/2021 <br />WorkOrder:2106B91 <br />BatchID:224784 <br />Analytical Method:E524.3 <br />Unit:µg/L <br />Sample ID:MB/LCS/LCSD-224784 <br />2106B91-001AMS/MSD <br />Instrument:GC45 <br />Matrix:Drinking Water <br />Extraction Method:E524.3 <br />QC Summary Report for E524.3 <br />Analyte MB <br />Result <br />MDL RL SPK <br />Val <br />MB SS <br />%REC <br />MB SS <br />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 <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 0.0466 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 <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 />MS <br />DF <br />1,2-Dibromo-3-chloropropane 0.0359 0.0472 0.10 ND 36,F1 47,F1 70-130 27.1 301 <br />Surrogate Recovery <br />tert-Butyl methyl ether-d3 0.820 1.31 11 82 131,F3 70-130 46.3,F3 30 <br />4-BFB 0.926 0.910 11 93 91 70-130 1.74 30 <br />1,2-dichlorobenzene-d4 1.08 1.08 11 108 108 70-130 0.203 30 <br />CA ELAP 1644 <br />Page 7 of 11