| This document provides information and guidance to base environmental coordinators, site project managers and other decision makers within the Army for the purposes of improving the decision making process at sites with contaminated groundwater. The document provides background information on the limitations to groundwater cleanup in highly complex and heterogeneous aquifer systems that are impacted by non-aqueous phase liquids (NAPL). A decision framework is proposed consistent with regulatory guidance on the issue of technical impracticability to assist the site manager or other designated person in selecting a cost effective groundwater remedial strategy that can be accepted by all stakeholders. The primary objective of the document is to ensure that the Army, while fulfilling all its legal obligations at impacted sites, achieves an acceptable balance between expenditures, based on lifecycle costing, and reduction in risks to human health and the environment. |