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VCSti <br /> Idata, an estimate of the duration of the clean up time can be provided and the costs for system <br /> implementation and operation and maintenance can be finalized <br /> A pilot testing proposal for a constant rate aquifer pumping test and air sparge ng/vacuum extraction <br /> tests is included in Appendix D Characteristics that will be evaluated from the pilot testing data <br /> include vadose zone gas permeability, groundwater flow rate, radial influence of the sparging well, <br /> aquifer permeability and heterogeneities, and contaminant volatility and solubility Additionally, costs <br /> for obtaining enhanced bioremediation treatibihty data is also included Soil borings will be required <br /> to collect samples for the treatibility analyses Characteristics that will be evaluated from the <br /> treatibility data include organic content, pH, permeability, moisture content, nutrient level, and redox <br /> potential <br /> IAES also recommends that a sensitive receptor survey be conducted to identify exposure pathways <br /> and any potential human and ecological receptors <br /> I <br /> I <br /> I <br /> I <br /> 11 <br />