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L & M OPERABLE UNIT-THIRD QUARTER 2014 SITE STATUS, REMEDIAL SUMMARY, <br /> AND GROUNDWATER MONITORING REPORT <br /> Groundwater Monitoring and Sampling <br /> October 31, 2014 <br /> 2.5.2.1 Separate Phase Hydrocarbons <br /> During 3Q14, measurable SPH or SPH-sheen was not observed in the C-Zone wells. <br /> 2.5.2.2 Petroleum Hydrocarbons and Fuel Oxygenates <br /> TPHg, TPHd, TPHo, and fuel oxygenates with concentrations at or above the MRLs are <br /> summarized below. <br /> Number of Number ofMinimum Detected Maximum Detected <br /> Detections C-ZoneConcentrationin mg/L Concentration in mg/L <br /> Constituents above the MRL Wells (Well ID) (Well ID) <br /> Analyzed <br /> TPHg 6 8 0.054 (MW-61) 3.1 (MW-64) <br /> TPHd 8 8 0.26 (MW-67) 2.8 (MW-54) <br /> TPHo 8 8 0.21 (MW-61; MW-64) 1 .0 (MW-62) <br /> Benzene 4 8 0.00056 (MW-64) 0.0051 (MW-66) <br /> Toluene 3 8 0.0006 (MW-64) 0.0029 (MW-66) <br /> Ethylbenzene 2 8 0.00057 (MW-54) 0.00072 (MW-64) <br /> Total Xylenes 3 8 0.0013 (MW-64) 0.0066 (MW-66) <br /> MTBE 3 8 0.0006 (MW-63) 0.013 (MW-64) <br /> TBA 2 8 0.018 (MW-64) 0.068 (MW-54) <br /> Definitions: <br /> ID = Identification <br /> mg/L = Milligrams per liter <br /> MRL = Method reporting limit <br /> MTBE= Methyl tertiary butyl ether <br /> TBA = Tertiary butyl alcohol <br /> TPHd = Total petroleum hydrocarbons as diesel <br /> TPHg = Total petroleum hydrocarbons as gasoline <br /> TPHo = Total petroleum hydrocarbons as motor oil <br /> --- = Not applicable <br /> 2.5.2.3 Dissolved Arsenic <br /> C -Zone wells are not sampled for arsenic in accordance with MRP R-5-2012-0805. <br /> 2.5.2.4 Quality Assurance/Quality Control Samples <br /> Duplicate sample QCDUP-5 was collected from well MW-64. A comparison of the <br /> samples is shown below. <br /> 5ta ntec 2.10 <br />