Corrective Action Plan for the Risk-Based Closure of the Base Exchange Service Station, Tyndall Air Force Base, Florida
Abstract
The objective of risk-based remediation is to reduce the risk of specific chemicals to human health and or ecological receptors such as animals or plant life. For any chemical to pose a risk, four elements must exist at the site: A source of chemical contamination that exceeds or could generate chemical contamination above health-protective or aesthetic standards; A mechanism of contaminant release; A human or ecological receptor available for chemical contact; and A completed pathway through which that receptor will contact the chemical. If any one of these four elements is absent at a site, there is no current risk. The reduction or elimination of risk can be accomplished by limiting or removing any one of these four elements from the site. The goal of this risk-based remediation approach is to find the most cost-effective method of reducing present and future risk by combining three risk reduction techniques: Chemical Source Reduction - Achieved by natural attenuation processes over time or by engineered removals such as free product recovery, soil vapor extraction (SVE), or in situ bioventing. Chemical Migration Control - Examples include natural attenuation of a groundwater plume, and SVE to prevent migration of hazardous vapors to a receptor exposure point. Receptor Restriction - Land use controls and site fencing to eliminate chemical exposure until natural attenuation and/or engineered remediation reduce the chemical source and/or eliminate the potential for chemical migration to an exposure point.
Document Details
- Document Type
- Technical Report
- Publication Date
- Aug 01, 1999
- Accession Number
- ADA381220
Entities
Organizations
- Parsons Corporation