PART I: Bioventing Pilot Test Work Plan for PS-2, PS-1A, PS-1B, Building 2034, Building 2035, Fairchild Air Force Base, Washington. PART II: Draft Bioventing Pilot Test Interim Results Report for PS-2, PS-1A, PA-1B, Building 2034, Building 2035, Fairchild Air Force Base, Washington. Volume 1

摘要

This Pilot Test Work Plan presents the scope of in situ bioventing pilot tests for treatment of fuel contaminated soils for five sites at Fairchild Air Force Base, Spokane County, Washington. Fairchild AFB is located approximately 12 miles west of Spokane, Washington. The bioventing pilot test which will be conducted at each of the five sites has three primary objectives. These are: (1) to assess the potential for supplying oxygen throughout the fuel hydrocarbon-contaminated soil zone; (2) to determine the rate at which indigenous microorganisms will degrade the fuel in the soil when stimulated by oxygen rich soil gas; and (3) to evaluate the potential for sustaining these rates of fuel biodegradation until the contamination is remediated below regulatory standards. The bioventing pilot test at each site will be divided into two test events. An initial pilot test will determine the technical feasibility and important design parameters such as air permeability, radius of oxygen influence, fuel biodegradation rates, and potential air emissions (via soil gas escaping from the subsurface to the atmosphere during air injection). An extended (one-year) pilot test will determine the longer term application of this remedial technology to degrade hydrocarbons at each individual site. If bioventing proves to be applicable, pilot test data could be used to design and implement a bioventing remediation system. A significant amount of the fuel contamination should be biodegraded during the extended (one-year) pilot tests since the bioventing will take place within the most contaminated soils at each site. Additional background information on the development and recent success of the bioventing technology is found in the document entitled 'Test Plan and Technical Protocol for a Field Treatability Test for Bioventing' (Hinchee et al. 1992).