Applying Multiple Geophysical Investigative Methods and High-Resolution Data Acquisition in Fractured Bedrock Remediation

摘要

Background/Objectives. Past operations at a truck stop operated in Richmond, KY, resulted in multiple gasoline releases to the subsurface. Over a period of 20 years, site investigation activities have revealed a 320 feet long dissolved BTEX plume within the fractured bedrock beneath the site. The subsurface lithology at the site consists of a thin, approximately one to three feet thick clay overburden, underlain by Upper Ordovician Calloway Creek Limestone, Garrard Siltstone, and Clays Ferry Formation. Monitoring wells at the site were installed with screened intervals varying from 10 feet to 40 feet in length, and screened across multiple formations. Groundwater samples collected from nested wells indicate the presence of dissolved benzene in both the shallow and deep wells at various locations throughout the plume.