Treatability Study in Support of Intrinsic Remediation for Site OT 24 at MacDill Air Force Base, Florida. Volume 2
Abstract:
This report presents the results of an intrinsic remediation treatability study TS performed by Parsons Engineering Science, Inc. Parsons ES at Site OT 24, MacDill Air Force Base AFB, the Base, Tampa, Florida to evaluate the use of intrinsic remediation natural attenuation with long-term monitoring LTM as a remedial option for dissolved benzene, toluene, ethylbenzene, and xylenes BTEX contamination in the shallow saturated zone. Soil and groundwater contamination is documented for the site, with contamination being present in the aqueous i.e., dissolved and gaseous phases and as residual light nonaqueous-phase liquid LNAPL within the aquifer matrix. The presence of mobile LNAPL free product in the immediate vicinity of the contamination source area is also indicated at this site. This study focused on the impact of dissolved BTEX on the shallow groundwater system at and downgradient from the site. The impact of dissolved chlorinated aliphatic hydrocarbons CAHs such as vinyl chloride on the shallow groundwater system is also discussed. Site history and the results of soil, groundwater, and sediment investigations conducted previously also are summarized in this report