Abstract
The development of a conceptual site model (CSM) is an invaluable tool used for assessing and planning
 remedial actions at a contaminated site. The CSM incorporates site-specific, hydrogeologic and
 geochemical information to identify contaminants of concern, sources of pollution, environmental
 pathways and retardation mechanisms, and points of exposure. The model is dynamic and continually
 revised as new information is obtained during the course of investigation. A ground water contamination
 case study is examined to illustrate the development and application of a CSM. The site is a metal
 plating facility that has contaminated the ground water with chromium. The CSM was incorporated
 into a 3-D fate and transport model. The Heavy Metal model, HM-3D, was used to simulate the fate
 and transport of chromium at the site and evaluate pump-and-treat remediation scenarios.
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