Operations and Maintenance Manual for Expanded Bioventing System at IRP Site 11, Aircraft Ground Equipment Maintenance Area
Abstract
This Operations and Maintenance (O&M) Manual has been created as a guide for monitoring and maintaining the performance of the expanded bioventing blower system and vent well plumbing at Installation Restoration Program (IRP) Site 11 at Beale Air Force Base (AFB), California. Record drawings of the expanded bioventing system installed at IRP Site 11 have been provided to Beale Air Force Base (AFB) personnel. Bioventing is the forced injection of fresh air to enhance the supply of oxygen in subsurface soils for in situ bioremediation. A blower system is used to inject air into the soil, thereby supplying fresh atmospheric air (with approximately 20.8 percent oxygen) to contaminated soils. Once oxygen is provided to the subsurface, existing bacteria aerobically break down fuel residuals. Aerobic biodegradation is much more efficient than anaerobic biodegradation which occurs in oxygen depleted soils. Parsons Engineering Science, Inc. (Parsons ES) has installed an air injection bioventing system consisting of one air injection blower, three vent wells (VWs), five soil vapor monitoring points (VMPs), and associated piping at the site. Following the installation and testing of a pilot-scale bioventing system in 1993 and 1994, Parsons ES installed an expanded bioventing system and initiated system operation on 9 July 1996. The air injection rates of the expanded bioventing system were optimized at each vent well to assure adequate aeration of contaminated soils to promote aerobic biodegradation and limit the potential for vapor migration.
Document Details
- Document Type
- Technical Report
- Publication Date
- Dec 01, 1996
- Accession Number
- ADA384449