BB&E was retained by the Air National Guard (ANG) to provide Remedial Process Optimization (RPO) and Comprehensive Environmental Response, Compensation and Liability Act (CERCLA) 5-Year Review services per Air Force and U.S. Environmental Protection Agency requirements including evaluation of site remedial and closure strategies, emerging contaminant impacts, areas for improvement to meet remedial objectives, adequacy of Conceptual Site Models (CSMs), and adequacy of remedy protectiveness. BB&E provided evaluation and assessment at over 35 ANG installations and 90 remediation sites nationwide (including two National Priority List sites) and provided recommendations which lead to the improvement of system performance and expedited cleanup times and allowed the ANG to proceed toward more efficient site closure. As part of the RPO process, BB&E evaluated CSMs for adequacy of delineation for all media types including soil, groundwater, surface water, sediment, and air. BB&E also evaluated potential residual contaminant areas for focused treatment to reduce cleanup times and long-term cleanup costs and prepared remedial alternatives evaluations including Net-Present Value (NPV) cost assessments. In addition to traditional RPO activities, BB&E conducted Sustainable Remediation Evaluations (SREs). These SREs resulted in recommendations that reduce energy consumption and associated greenhouse gas emissions by an average of 50% for operating remedial systems. BB&E cost effectively drove the sustainable remediation process by setting reasonable boundaries, conducting Life-Cycle Assessments as necessary, and providing multiple options for consideration to improve remedy sustainability and achieve the remedial objectives.
