Intrinsic Remediation Engineering Evaluation/Cost Analysis for the Former AGE Fueling Facility Site, Seymour Johnson Air Force Base, Goldsboro, North Carolina. Draft. Volume 1. Report
Abstract
This report presents the results of the investigation performed by Parsons Engineering Science, Inc. (Parsons ES) at Seymour Johnson Air Force Base (AFB), North Carolina to evaluate the use of intrinsic remediation (natural attenuation) with long-term monitoring (LTM) as a remedial option for dissolved benzene, toluene, ethylbenzene, and total xylenes (BTEX) contamination in shallow groundwater. Parsons ES conducted the field investigation during the period between January and July 1995 at the former aerospace ground equipment (AGE) fueling facility site (adjacent to Building 4715). The source of the contamination is assumed to be releases from an abandoned underground storage tank (UST) system that was formerly used to store gasoline, JP-4, and diesel fuel. BTEX and total volatile hydrocarbons (TVH) were determined to be dissolved in groundwater and adsorbed to soils. Residual light non-aqueous phase liquid (LNAPL) was found in the soil column (at the groundwater interface) in the immediate vicinity of the former UST system. Also, mobile LNAPL (free product) was observed in several monitoring points installed during the investigation. This study focused on the impacts of the dissolved BTEX and residual and mobile LNAPL on the shallow groundwater system at the site. Potential electron acceptors and other geochemical parameters were analyzed to quantify ongoing biodegradation. An important component of this study was an assessment of the potential for contamination in groundwater to migrate from the former AGE fueling facility site to potential receptor exposure points. The Bioplume II model was used to estimate the fate and transport of dissolved BTEX in the shallow saturated zone under the influence of advection, dispersion, sorption, and biodegradation. Whenever possible, input parameters for the Bioplume II model were obtained from data collected by Parsons ES during 1995. Extensive site-specific data were used for model calibration and implementation.
Document Details
- Document Type
- Technical Report
- Publication Date
- Apr 01, 1996
- Accession Number
- ADA382005
Entities
Organizations
- Parsons Corporation