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Title: Groundwater modeling in RCRA assessment, corrective action design and evaluation

Groundwater modeling was conducted to design, implement, modify, and terminate corrective action at several RCRA sites in EPA Region 4. Groundwater flow, contaminant transport and unsaturated zone air flow models were used depending on the complexity of the site and the corrective action objectives. Software used included Modflow, Modpath, Quickflow, Bioplume 2, and AIR3D. Site assessment data, such as aquifer properties, site description, and surface water characteristics for each facility were used in constructing the models and designing the remedial systems. Modeling, in turn, specified additional site assessment data requirements for the remedial system design. The specific purpose of computer modeling is discussed with several case studies. These consist, among others, of the following: evaluation of the mechanism of the aquifer system and selection of a cost effective remedial option, evaluation of the capture zone of a pumping system, prediction of the system performance for different and difficult hydrogeologic settings, evaluation of the system performance, and trouble-shooting for the remedial system operation. Modeling is presented as a useful tool for corrective action system design, performance, evaluation, and trouble-shooting. The case studies exemplified the integration of diverse data sources, understanding the mechanism of the aquifer system, and evaluation of the performancemore » of alternative remediation systems in a cost-effective manner. Pollutants of concern include metals and PAHs.« less
Authors:
;  [1]
  1. Benchmark Engineering Inc., Birmingham, AL (United States)
Publication Date:
OSTI Identifier:
215566
Report Number(s):
CONF-951139--
TRN: IM9618%%250
Resource Type:
Conference
Resource Relation:
Conference: 16. hazardous waste conference and exhibition: new frontiers in hazardous waste, Washington, DC (United States), 6-8 Nov 1995; Other Information: PBD: 1995; Related Information: Is Part Of Superfund 16: Conference and exhibition proceedings. Volume 2; PB: 817 p.
Publisher:
E.J. Krause and Associates, Bethesda, MD (United States)
Country of Publication:
United States
Language:
English
Subject:
54 ENVIRONMENTAL SCIENCES; GROUND WATER; REMEDIAL ACTION; ENVIRONMENTAL TRANSPORT; MATHEMATICAL MODELS; METALS; REMOVAL; POLYCYCLIC AROMATIC HYDROCARBONS; EXTRACTION APPARATUSES; PERFORMANCE; SITE CHARACTERIZATION; RESOURCE RECOVERY ACTS; DATA; HYDROLOGY; GEOLOGY; PLUMES