Bioventing System Start-Up Report

Between May 11 and 15,1991, ES installed a bioventing system at the 7th Street BX Service Station. The 7th Street BX Service Station is located near the intersection of 7th Street and Eglin Boulevard on Eglin Main Base Figure 1. Site description and history were presented in the Engineering Work Plan for installation of this system ES, 1992. Previous and ongoing investigations at the site revealed presence of volatile and semivolatile organic compounds in the groundwater. Contaminants detected are mostly constituents of gasoline. Free product has been measured at the site at various times over the past 5 years. No soil sampling or analysis has been completed previously at the site. However, a significant portion of the soil at the site is suspected to be impacted by the release of gasoline into the subsurface. Currently, a groundwater recovery and treatment system is being operated at the site to remove floating and dissolved petroleum hydrocarbons from the groundwater. The groundwater recovery and treatment system is incapable of remediating soil contamination, therefore, the bioventing treatability system is intended to remediate the soil contamination. The objective of the bioventing system at the 7th Street BX Service Station is to aid in expediting remediation efforts at the site. This objective was developed through evaluation of previous investigation results, current remediation efforts, and results of a bioventing pilot test at the site.