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S ECO ? <br /> Number of Number Minimum Maxiro ) <br /> Detections of Deep Detected Detected <br /> Constituents above the Wells Concentration Concentration in <br /> MRL Analyzed in m /L Well ID m /L Well ID <br /> n-butyl benzene 4 14 0.00054 (MW-16) 0.012 (MW-53) <br /> Tert-butyl benzene 4 14 0.00061 (MW-41) 0.00082 (MW-29) <br /> sec-butyl benzene 6 14 1 0.00098 (MW-41) 0.023 (MW-53) <br /> Isopropyl benzene 6 14 0.00069 (MW-41) 0.082 (MW-53) <br /> n-propyl benzene 4 14 0.00052 (MW-42) 0.26 (MW-53) <br /> 1,2,4-Trimethyl 1 14 — 0.00062 (MW-54) <br /> benzene <br /> 1,3,5-Trimethyl 1 14 0.00079 (MW-54) <br /> benzene <br /> Definitions: <br /> MRL = Method Reporting Limit <br /> mg/L= Milligrams per Liter <br /> — = Not applicable <br /> 4.4.2.4 SVOCs <br /> There were no SVOCs with concentrations at or above the MRLs during the first quarter 2008. <br /> 4.4.2.5 Dissolved Metals <br /> Dissolved metals with concentrations detected at or above the MRLs are summarized below. <br /> Number of Number <br /> Detections of Deep Minimum Maximum <br /> Constituents above the Wells Concentration in Concentration in <br /> MRL Analyzed mg/L (Well ID) mg/L (Well ID) 1 <br /> Arsenic 13 14 0.0086 (MW-35) 0.059 (MW-51) <br /> Definitions: <br /> MRL = Method Reporting Limit <br /> i <br /> mg/L = Milligrams per Liter <br /> 4.4.2.6 QA/QC Samples <br /> Duplicate samples QCDUP-2 and QCDUP-5 were collected from L&M OU deep zone wells <br /> MW-26 and MW-16, respectively, during the first quarter 2008 sampling event. A comparison of <br /> the samples is shown below. <br /> • <br /> 1 QO8QSSRQRSRQMR.Final.doc 18 April 30,2008 <br /> 77TW.26397.42.1307 <br />