| Abstract |
This decision document presents a selected remedial action designed to protect human and ecological receptors at Zone 2, Pease AFB, New Hampshire. Zone 2 includes the following six sites: Site 1 (Landfill 1 or LF-1), Site 7 (Fire Department Training Area 1 or FDTA-1), Site 10 (Leaded Fuel Tank Sludge Area or LFTS), Site 22 (Burn Area 1 or BA-1), Site 37 (Burn Area 2 or BA-2), and Site 43 (McIntyre Road Drum Disposal Area or MRDDA). Site 24 (Peverly Ponds and Bass Pond) also is addressed as part of the Zone 2 action. The selected remedy includes in situ treatment of BA-1 source area light, nonaqueous-phase liquids (LNAPLs) and residual LNAPL with enhancement of soil vapor extraction (SVE) by air sparging, which involves injection of air below the water table. The selected remedy also includes establishment of institutional controls restricting future use of Zone 2 groundwater, including a Groundwater Management Zone (GMZ) and performance of long-term monitoring. The selected remedy for Zone 2 also includes natural attenuation of groundwater contamination. No action is proposed for source control under CERCLA for LF-1, FDA-1, LFTS, BA-2, and MRDDA. |
