U.S. EPA Contaminated Site Cleanup Information (CLU-IN)


U.S. Environmental Protection Agency
U.S. EPA Technology Innovation and Field Services Division

Fractured Bedrock Project Profiles

Last Updated: December 31, 2010

Point of Contact:
Michael Infurna
USEPA
290 Broadway
New York NY 10007-1866 
Tel: 212-637-4177 
Email: infurna.michael@
epa.gov

BM Corporation - TJ Watson Research Ctr Yorktown
Yorktown, NY


Hydrogeology:

The site is underlain by metamorphic bedrock consisting primarily of garnet and quartz rich biotite schist. It is encountered at about 78 feet bgs.The bedrock is dominated by foliation striking northeast-southwest and dipping to the south between 60 and 90 degrees with joints generally orienting and dipping in the same direction. Two bedrock ridges cross the site from northeast to southwest.

The overburden consists of glacial deposits and weathered bedrock.

Overburden groundwater is found in the sand with the water table being about 10 feet bgs. The vertical gradient is downward.

Targeted Environmental Media:
  • - Fractured Bedrock

Contaminants:

The 1,1,2-Trichloro-1,2,2-trifluoroethane (Freon 113) plume in the bedrock was about 780 feet wide at its widest and 1,600 feet long.

Major Contaminants and Maximum Concentrations:
  • - Trichloroethene (27 µg/L)
  • - 1,1,2-Trichloro-1,2,2-Trifluoroethane (1,400 µg/L)

Site Characterization Technologies:

No technologies selected.


Remedial Technologies:

  • - Pump and Treat
Comments:
The bedrock pump and treat system began in 1990.
Remediation Goals:

New York State Groundwater Quality Standards.


Status:

Since start up the plume has been greatly reduced in size and most wells are nondetect.

http://www.epa.gov/region02/waste/fsibmtj.htm

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