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Stantec <br /> L & M OPERABLE UNIT- THIRD QUARTER 2010 SITE STATUS, REMEDIAL SUMMARY, <br /> AND GROUNDWATER MONITORING REPORT <br /> Groundwater Monitoring and Sampling <br /> October 27, 2010 <br /> 2.6.2.3 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 D-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 2 8 0.00090 (MW-70) 0.0015 (MW-55) <br /> sec-butyl benzene 3 8 0.00065 (MW-72) 0.0024 (MW-55) <br /> Iso-propyl benzene 3 8 0.00056 (MW-72) 0.0036 (MW-55) <br /> n-propyl benzene 3 8 0.00081 (MW-71) 0.0046 (MW-70) <br /> Definitions: <br /> ID = Identification <br /> mg/L = Milligrams per Liter <br /> MRL = Method Reporting Limit <br /> 2.6.2.4 Semi-volatile Organic Compounds <br /> There were no SVOCs with concentrations at or above the MRLs during the third quarter 2010. <br /> 2.6.2.5 Dissolved Metals <br /> Dissolved metals with concentrations detected at or above the MRLs are summarized below. <br /> Number of Number Minimum Maximum <br /> Detections of D-Zone Detected Detected <br /> Constituents above the Wells Concentration in Concentration in <br /> MRL Analyzed mg/L (Well ID) mg/L (Well ID) <br /> Arsenic 8 8 0.020 (MW-71 & 0.040 (MW-55) <br /> MW-74) <br /> Nickel 1 8 -- 0.013 MW-68 <br /> Zinc 2 8 0.014 (MW-74) 0.043 (MW-68) <br /> Definitions: <br /> ID = Identification <br /> mg/L = Milligrams per Liter <br /> MRL = Method Reporting Limit <br /> -- = Not Applicable <br /> IA-Fidewater7W Stockton(Parcel 2A-0415)\Reports\QMR\2010\3010\3010QSSRORSROMR Stockton_FINAL.doc 2.17 <br />