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McCampbell Analyticalanc. <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@mccampbell.com <br /> <br />Quality Control Report <br />Client: Terracon WorkOrder: 1904884 <br />Date Prepared: 4/25/19 <br />BatchID: 176811 <br />Date Analyzed: 4/25/19 Extraction Method: E524.3 <br />Instrument: GC45 Analytical Method: E524.3 <br />Matrix: Drinking Water Unit: jtg/L <br />Project: NA197009; Azevedo Property Sample ID: MB/LCS/LCSD-176811 <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 />1,2-dichlorobenzene-d4 1.0 1 100 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 0.079 0.072 0.10 79 72 70-130 10.5 20 <br />Surrogate Recovery <br />1,2-dichlorobenzene-d4 0.98 1.0 1 98 101 70-130 2.67 20 <br />CA ELAP 1644 <br />Page 6 of 10