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observation or field analytical measurements indicate that the extent of soil contamination <br /> has not been determined. <br /> Table 2-1 <br /> Feasibility Study Data Needs <br /> Potential Source Area Description Potential Technologies Data Needs <br /> 1 0 former underground • bioventing Extent of affected soil <br /> storage tank • soil vapor extraction moisture content <br /> • soil-PNAs,diesel, pH <br /> cyanide dry bulk density <br /> • groundwater-diesel, stratigraphy <br /> gasoline,benzene, <br /> PNAs <br /> 2 0 former lamp black pit • offsite disposal or Extent of residue <br /> and gas holder treatment free liquid <br /> • soil saturated with oil • liquids removal and Moisture content <br /> and water to 25 ft. offsite treatment <br /> bgs. • thermal deseeiption <br /> • adjacent soil-PNAs, • solidification <br /> diesel,gasoline <br /> 3 • former tar pit • excavation and offsite Extent of residue <br /> • tar observed at disposal <br /> surface • asphalt batching <br /> • adjacent soil-PNAs, <br /> diesel,gasoline <br /> 4 0 former underground • bioventing Extent of affected soil <br /> storage tank • soil vapor extraction moisture content <br /> • soil-PNAs,diesel pH <br /> • groundwater-PNAs, dry bulk density <br /> benzene,diesel, stratigraphy <br /> Other locations . boring locations B9, to be determined Extent of affected soil <br /> within Area I B14,B16,B21,and <br /> SB1B <br /> Soil sampling: Four samples will be collected from each boring for analysis. The depths of <br /> the samples will be at approximately 5 foot intervals to be determined based on field <br /> observations of where former MGP residues appear. Representative photographs will be <br /> taken of the fill material, native material, and any former MGP residue material encountered. <br /> Soil boring depths and sample depths will depend on where former MGP residues are <br /> encountered. <br /> Residue sampling: A representative residue sample will be collected from source areas 2 <br /> and 3. The samples will be sent to a laboratory for analysis of parameters critical to <br /> evaluating disposal and treatment options. <br /> SF010030B82.DOC 2-2 <br />