Results of a two-year in situ bioventing demonstration

A full-scale bioventing demonstration was recently completed at a large diesel spill site located at a major railroad facility in Nebraska. An estimated 11,500 cubic meters of soil are being treated in this demonstration. During this two-year demonstration, both in situ respiration rates and volatilization were routinely monitored to estimate total fuel removal rates, This paper discusses the relative contributions of biodegradation and volatilization in this bioventing application and presents two-year soil sampling results which indicate that significant fuel remediation has occurred at the site. Both capital and operating costs for this system are very competitive and will be detailed in this document.