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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 /> 2.6.2.1 Separate Phase Hydrocarbons <br /> During 3Q14, measurable SPH or SPH-sheen was not observed in the D-Zone wells. <br /> 2.6.2.2 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 D-ZoneConcentrationin mg/L Concentration in mg/L <br /> Constituents above the MRL Wells (Well ID) (Well ID) <br /> Analyzed <br /> TPHg 4 8 0.18 (MW-72) 1 .2 (MW-70) <br /> TPHd 8 8 0.25 (MW-69) 2.1 (MW-55) <br /> TPHo 8 8 0.16 (MW-69) 1 .3 (MW-71) <br /> Benzene 1 8 --- 0.26 (MW-70) <br /> Toluene 1 8 --- 0.0055 (MW-70) <br /> Ethylbenzene 1 8 --- 0.0011 (MW-70) <br /> Total Xylenes 1 8 --- 0.0049 (MW-70) <br /> MTBE 1 8 --- 0.0026 (MW-55) <br /> TBA 3 8 0.0093 (MW-71) 0.033 (MW-55) <br /> Definitions: <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 /> 2.6.2.3 Dissolved Arsenic <br /> D-Zone wells are not sampled for arsenic in accordance with MRP R-5-2012-0805. <br /> 2.6.2.4 Quality Assurance/Quality Control Samples <br /> Duplicate sample QCDUP-6 was collected from L&M OU D-Zone well MW-72 during <br /> 3Q14 sampling event. A comparison of the samples is shown below. <br /> 5ta ntec 2.12 <br />