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Stantec <br /> L & M OPERABLE UNIT- FOURTH QUARTER AND ANNUAL 2010 SITE STATUS, <br /> REMEDIAL SUMMARY, AND GROUNDWATER MONITORING REPORT <br /> Groundwater Monitoring and Sampling <br /> January 31, 2011 <br /> 2.5.2.3 Volatile Organic Compounds <br /> VOCs with concentrations at or above the MRLs are summarized below. <br /> Number of Number Minimum Detected Maximum <br /> Detections of C-Zone Concentration in Detected <br /> Constituents above the Wells mg/L (Well ID) Concentration in <br /> MRL Analyzed mg/L (Well ID) <br /> n-butyl benzene 3 8 0.0018 (MW-66) 0.029 (MW-64) <br /> tert-butyl benzene 3 8 0.00064 (MW-65) 0.00073 (MW-67) <br /> sec-butyl benzene 3 8 0.0014 (MW-66) 0.019 (MW-64) <br /> Isopropyl benzene 3 8 0.0065 (MW-66) 0.084 (MW-64) <br /> n-propyl benzene 3 8 0.0051 (MW-54) 0.22 (MW-64) <br /> Definitions: <br /> ID = Identification <br /> mg/L = Milligrams per liter <br /> MRL = Method reporting limit <br /> 2.5.2.4 Semi-volatile Organic Compounds <br /> SVOCs with concentrations at or above the MRLs are summarized below. <br /> Number of Number Minimum Detected Maximum <br /> Detections of C-Zone Concentration in Detected <br /> Constituents above the Wells mg/L (Well ID) Concentration in <br /> MRL Analyzed mg/L (Well ID) <br /> Bis (2-ethylhexyl) - <br /> phthalate 1 8 --- 0.015 (MW-63) <br /> Definitions: <br /> ID = Identification <br /> mg/L = Milligrams per liter <br /> MRL = Method reporting limit <br /> --- = Not applicable <br /> 2.5.2.5 Dissolved Metals <br /> Analysis for dissolved metals is not required during the second and fourth quarter per MRP <br /> No. R5-2004-0820. <br /> I:\Tidewater\TW Stockton(Parcel 2A-0415)\Reports\QMR\2010\4010-Annual\4Q10 and Annual QSSRQRSRQMR Stockton_F I NAL.doc 2.13 <br />