Justification for Closure for the Base Exchange Service Station (Site ST019), Randolph AFB, Texas
Abstract
The original release at the BX Service Station was thought to have occurred via the UST appurtenances (i.e., valves, piping) which were replaced in early 1989 (see Exhibit A) (designated as the "UST release"). An inventory record examination revealed that between 200 and 2,000 gallons of fuel had potentially been released prior to the summer of 1987. In 1989, all of the USTs passed tank tightness testing. Information regarding this release and the subsequent investigations have been documented in numerous reports. In the summer of 1996, an abandoned aviation gasoline (AVGAS) line was severed during Base construction activities, resulting in the release of an unknown quantity of fuel to the subsurface (see Exhibit A) (designated as the "AVGAS release"). Subsequent to the AVGAS release, free product was found in well ST019MW074 to the northwest of the release point, presumably from the ruptured AVGAS line. Versar Inc., San Antonio, Texas performed free-product recovery in December 1996 and January 1997 (Versar, 1997). Free product was recovered from ST019MW074. Less than a gallon of product was recovered during this effort. Subsequent sampling events in June 1997 (Weston, 1997) and November 1997 indicated no free product present in this or any other wells at the site. Investigation activities have been completed to assess the consequences of the AVGAS release with respect to subsurface contamination and are reported herein. In addition, a bioventing pilot system has been installed at the AVGAS release location for source removal. The bioventing system was put into operation in December 1997 and is expected to continue operating for one year.
Document Details
- Document Type
- Technical Report
- Publication Date
- May 01, 1998
- Accession Number
- ADA381566
Entities
Organizations
- Parsons Corporation