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

Phytotechnology Project Profiles

Phytoremediation at AOC-539, Grand Forks Air Force Base in North Dakota
Last Updated: Fall 2004
Site Information                                                      
Site Name, Location:   Grand Forks Air Force Base, Grand Forks, ND, United States
Site Type:   Federal Facility
Is this a Federal
Superfund Site?
  No
Is this a Federal or
Military Site?
  Yes
Entity Responsible for Cleanup:   Air Force


Project Information                                                      
Project Name:   Phytoremediation at AOC-539, Grand Forks Air Force Base in North Dakota
Site History and Background:   The AOC-539 area was the site of a former jet engine testing and maintenance facility that used solvents and other petroleum based liquids during operations. Some of those materials appear to have leaked or spilled onto the ground.
Scale:   Pilot/Field Demonstration
Project Status:   Ongoing
Project Start Date:   2001
Media Treated:  
Media Qty. Geology Comments
Soil Soil consists of sandy loam 0 to 1 feet below ground surface, clay at 4 to 10 feet below ground surface.
Ground Water Depth to groundwater was 4.3 to 9.4 feet in September 2001, and 2.7 to 5.8 feet in September 2003. Estimated hydraulic gradient prior to site installation was 0.017 feet per foot. In the fall of 2003, gradients ranged from 0.0066 to 0.016 feet per foot. The estimated hydraulic conductivity is 0.371 feet per day.
Contaminants Treated:  
Contaminant Initial
Concentration
Depth Media Comments
Total petroleum hydrocarbons 1400 mg/kg Soil Gasoline-range organics.
Total petroleum hydrocarbons 19 mg/L Ground Water
Trichloroethene 20 mg/kg Soil
Trichloroethene 24 mg/L Ground Water
Dichloromethane Soil
Dichloromethane Ground Water
Phytotechnology Mechanism(s):   Phytoremediation
Hydraulic Control
Phytovolatilization
Rhizodegradation
Phytodegradation
Plants and other Vegetation Used:   Hybrid Poplar
Eastern Cottonwood
Russian Olive
Carolina Poplar
Imperial Carolina Poplar
Planting Description:   All bare root material. Trees planted in 18 inch diameter auger borings 18 to 24 inches deep. Selected trees planted in borings 4 feet deep, but all trees planted at normal depth, i.e., same depth as grown in nursery. Tree spacing is 12 feet between rows, and 6 feet between trees within the row.
Planting Area:   0.7 acre
Climate:   Long term average precipitation: 19.6 inches
O & M Requirements:   Mowing, pruning, irrigation, replanting, animal control, insect control
Performance Data:   To date there are no clear trends in contaminant concentrations in groundwater or soil. Groundwater flow patterns are complex and have changed with time and growth of the trees. However, those changes may be influenced by site development that has occurred on the base at adjacent parcels. As of fall 2005, tree evapotranspiration has not developed a groundwater depression.
Cost of the Phytotechnology Project:   Planning/design/implementation through 1 year monitoring: approximately $320,000.
Lessons Learned:   Winter injury can be a significant factor in site establishment at northern latitudes, but extent of damage appears to be less with increasing tree age. Winter injury from jackrabbits can be significant. Some damage to poplars was noted in the first year despite tree guards (plastic protective sleeves around stem). Significant damage to some Russian olive trees was noted in the second winter.

Point(s) of Contact                                                                      
    Larry Olderbak
Grand Forks AFB Environmental
United States
Telephone: (701) 747-4183
E-mail: larry.olderbak@grandforks.af.mil

Al Erickson
CH2M Hill
United States
Telephone: (414) 847-0303
E-mail: Al.Erickson@CH2M.com

Information Source(s):   Green, Cynthia; Ana Hoffnagle. 2004. Phytoremediation Field Studies Database for Chlorinated Solvents, Pesticides, Explosives, and Metals.
http://clu-in.org/download/studentpapers/hoffnagle-phytoremediation.pdf

Trees at Grand Forks Get to the Root of the Problem. From CenterViews, Summer 2002.
http://www.afcee.brooks.af.mil/ms/msp/center/summer2002/treegrandforks.asp

EPA. 2005. Use of Field-Scale Phytotechnology for Chlorinated Solvents, Metals, Explosives and Propellants, and Pesticides. EPA 542-R-05-002.
http://www.epa.gov/tio/download/remed/542-r-05-002.pdf

Associated Vendor(s) or Consultant(s):   CH2M Hill, Inc.
 

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