Investigation Summary Report UST Site 870 (DERR Site EGSS, IRP Site Code ST61)
Abstract
The objective of this report is to provide a comprehensive summary of information, data, and observations made to date at the site. Current activities at the site include active and passive LNAPL removal, weekly monitoring of water and LNAPL levels, and a vapor exposure assessment (VEA). Active LNAPL recovery has been conducted at the site since the installation of the recovery system in June 1992, approximately 500 gallons of LNAPL have been recovered. Passive LNAPL recovery using absorbent pads enclosed in a stainless steel perforated bailer is also being used in selected wells to maximize LNAPL recovery. Water and LNAPL measurements are measured weekly to provide information regarding varying LNAPL thicknesses and fluctuations in the water table. A VEA for the Patriot Hills housing area is being conducted to determine whether the volatilization of toxic constituents of the LNAPL underlying the housing area constitutes a pathway for exposure to Patriot Hill residents. The project is in the planning stages and actual field vapor measurements using flux chambers are expected to begin in early March 1993.
Document Details
- Document Type
- Technical Report
- Publication Date
- Feb 01, 1993
- Accession Number
- ADA384509