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' ranging between 11,733 and 1,056,000 gpd/ft indicate that the water-bearing zone could potentially <br /> be suitable for industrial, municipal or irrigation use <br /> Values of the coefficient of storage at the Site ranged from 0 0068 to 0 205 Coefficient of storage <br /> values for unconfined aquifers range from 0 01 to 0 3 and values for confined aquifers range from 10'5 <br /> to 10'3 Results of extraction testing indicate that coefficient of storage values are similar to those <br /> observed during water release in an unconfined aquifer <br /> The average hydraulic conductivity (5 13 to 64 gpd/square foot) for MW 11 falls within a typical <br /> conductivity value for fine- to coarse-grained sand Water-bearing soils at the Site consist of fine- <br /> grained sands, corresponding to calculated conductivity values <br /> All of the observation wells were influenced during the pump test, including MW-5 which is located <br /> approximately 100 feet from the extraction well The maximum drawdown in the extraction well <br />' (MW-11) was 16 5 feet (to the bottom of the down hole pump) The maximum drawdown in the <br /> closest observation well(MW-3) was 0 09 feet The radius of influence for groundwater extraction <br /> at the Site is in excess of 100 feet with a field-determined maximum sustainable yield of 4 gpm <br /> 1 <br /> 6.0 REMEDIAL ALTERNATIVE <br />' Various remedial action technologies and processes exist that can be utilized to mitigate <br /> hydrocarbon-affected soil Such technologies and processes are broadly categorized as either 'n-situ <br /> or ex-situ based upon whether they are applied below or above ground Choice of a specific remedial <br /> action alternative is based in part upon economics, present and future land use, geologic and <br /> hydrogeologic site characteristics, nature and distribution of chemical constituents, safety, <br />' convenience, and remediation goals to be attained <br />' Based upon pnor experience at sites with similar geologic, hydrogeologic, and environmental <br /> concerns, several remedial action alternatives (RAAs) have been selected for consideration as the <br /> recommended remedial approach for the Site These options are as follows <br />' SOIL REMEDIATION <br />' OPTION I Passive Soil Remediation-No Action, <br /> OPTION II Soil Vapor Extraction With Off-Gas Treatment, <br /> OPTION III In-Situ Bioremediation, and <br />' OPTION IV Excavation With Off-Site Disposal <br /> AA11528J1 ASA 14 <br />