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: January 1, 2011

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

FMC Corporation
Middleport, NY


Hydrogeology:

Growndwater flow occurs in the overburden and fractured bedrock beneath the facility and surrounding areas. The shallow bedrock zone consists primarily of weathered and fractured limestone and sandstone, and the deep bedrock consists primarily of sandstones. A layer of shale (the Cambria Shale formation) is present between the shallow and deep bedrock regimes. The direction of regional groundwater flow is to the north/northwest. The primary pathway for groundwater migration is the shallow bedrock zone, with more limited flow in the overburden and deep bedrock zones.

Targeted Environmental Media:
  • - Dense Non-aqueous Phase Liquids (DNAPLs)
  • - Fractured Bedrock

Contaminants:

The plume extends up to 500 feet offsite.

Major Contaminants and Maximum Concentrations:
  • - Arsenic (920,000 µg/L)
  • - Benzene (1,250,000 µg/L)
  • - Chlorobenzene (1,250,000 µg/L)
  • - Methylene chloride (44,000,000 µg/L)
  • - Toluene (1,250,000 µg/L)
  • - Trichloroethene (540,000 µg/L)
  • - Xylenes (1,250,000 µg/L)
  • - Mercury (15,000 µg/L)
  • - Carbofuran (furadan) (10,400 µg/L)
  • - 4,4'-DDT (6,100 µg/L)

Site Characterization Technologies:

No technologies selected.


Remedial Technologies:

  • - Pump and Treat
Comments:
The groundwater pump and treat system includes recovery from several extraction wells placed in trenches that have been blasted into the bedrock to enhance groundwater yields. These blasted bedrock trenches run along most of the northern and eastern property boundary lines. The groundwater pump and treatment system includes 14 wells.
Remediation Goals:

Groundwater also contains 226,000 ug/L of dithiocarbamates,43,900 ug/L of Karbutilate, and 440,000 ug/L of Ethylene Thiourea.

The cleanup goals are New York state Groundwater Quality Criteria when available and risk based when there is no criteria.


Status:

The pump and treat system started up in 1988. It was modified with fracturing in 1994 and continues to pump. The system has generally halted offsite migration.

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

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