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EPA Project Manager
Mr. Andrew Fan
U.S. Environmental Protection Agency Region 3
1650 Arch Street MS 3LC20
Philadelphia, PA 19103-3433
Phone: (215) 814-3426
Virginia Department of Environmental Quality
Mr. Randy Chapman
Northern Regional Office
13901 Crown Court
Woodbridge, VA 22193
Phone: (703) 583-3816
In February 1999, EPA issued a Final Decision on the remedy after consideration of public comments on the remedial alternatives. The selected remedy is to continue operation of an interim pump-and-treat system installed in 1991 with installation of 4 horizontal infiltration wells on the community side. The horizontal infiltration wells, which began operation in April 2000, provide flushing of contaminated groundwater to the existing pump-and-treat system to enhance recovery. The remediation goal, as defined in the Final Decision, requires that groundwater be restored to drinking water standards, or that technological limits have been reached, provided that partial or full shut down of the system will not pose unacceptable risks to human health or the environmental.
In 2009, after 9 years of operating the final remedy and substantial cleanup of the release, EPA approved a “temporary shutdown test” of the Mantua system to collect data to determine whether a permanent shut down of the Mantua system is warranted. The remediation system located inside the Motiva Enterprises Terminal on the other side of Pickett Road will continue to remain in operation, and there is no plan to shut it down.
The shutdown test called for sub-slab soil vapor sampling of 18 homes located above the plume, and extensive groundwater sampling. The data collected from the 4-year test were reviewed by a technical workgroup consisting of representatives from the Virginia Department of Environmental Quality, the City of Fairfax, Fairfax County, the Mantua Community, and U.S. EPA. Groundwater data show that the systems’ performance has reached the point of diminishing returns, and further operation of the Mantua system will not perform more effectively than natural attenuation. Soil vapor data show that there is no vapor intrusion that would pose unacceptable health risks to homes above the plume. EPA presented the findings to the Mantua Community Association meeting on May 29, 2013. On August 20, 2013, based on review of the test data and support from the technical workgroup and the community, EPA approved permanent shut down of the Mantua System.
A large underground petroleum leak from the former Star Enterprise Terminal and now Motiva Enterprises Terminal on Pickett Road was discovered in 1990. The leak had resulted in a petroleum-contaminated groundwater plume that extended 2000 ft from Pickett Road to the Mantua community. Under EPA's direction, construction of a groundwater remediation system to clean up the petroleum-contaminated groundwater began shortly thereafter and began operation in 1991. Subsequently, the system was expanded and modified to its current configuration in 2000 as the final remedy. There are two major components of the remediation system, one located inside the Motiva Enterprises Terminal, and the other located in the community side known hereby as the Mantua system. The Motiva Terminal is one of four oil distribution terminals located on Pickett Road, Fairfax City, Virginia. The terminal has nine two-million-gallon above-ground tanks that supply petroleum to the region at a rate of one million gallons per day.
Petroleum leakage is primary concern.
- Some of the site’s key documents of interest are accessible below:
- Corrective Action Statement of Basis[PDF, 42 pages, 7.4 MB, About PDF]
- Environmental Indicator Determination - Human Exposures [PDF, 6 pages, 43 KB, About PDF]
- Environmental Indicator Determination - Groundwater Migration [PDF,8 pages, 137 KB, About PDF]
- All documents and reports regarding this facility also can be reviewed in person at these locations:
U.S. EPA Region III
Land & Chemicals Division - RCRA
1650 Arch Street-11th Floor
Philadelphia, PA 19103
Call for an appointment.
- Submit a FOIA Request
Get instructions on how to submit a FOIA request. Additional fee for requests over 100 pages.
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- The facility is under continued use.
- The EPA is dedicated to providing you with timely and accurate information about our work at this site. If you have any questions or concerns, please contact the EPA Project Manager: Andrew Fan (215) 814-3426.