U.S. EPA Region 3 - Waste and Chemicals Management Division - IBM
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High Priority Site for Corrective Action
Last Updated: May 12, 2000
IBM
MANASSAS, VIRGINIA
ID# VAD064872575
Current Progress at the Site:
A program has been implemented to remediate and monitor a plume of
perchloroethylene (PCE) in the groundwater extending from the facility in
Manassas, Virginia three miles to a public supply well in Prince William
County. The remediation program includes groundwater pump and treat,
groundwater monitoring, and soil vapor extraction.
The groundwater pump and treat portion of the remediation program was
initiated in 1985 and now consists of three pumping wells, one public supply
well, and an additional pilot pumping well. Extracted groundwater is
treated with two stage carbon adsorption systems. Spent carbon is recovered
at an offsite facility. As of December 1998, the groundwater pump and treat
has removed a total of 880 gallons (11,848 pounds) of PCE from the
groundwater.
The soil vapor extraction system was initially tested in 1988 and is
comprised of five extraction wells and seven air inlet wells. The system
removes PCE from the vadose zone near one of the pumping wells. As of
December 1998, the vapor extraction system has removed a total of 1,629
gallons (21,992 pounds) of PCE from the environment.
Groundwater data from monitoring wells has been collected since the late
1980's. The monitoring includes analyses to confirm that the volatile
organic compounds (VOCs) in the plume are being contained and that progress
towards the cleanup goals is being achieved. The current monitoring
program requires monthly groundwater level measurements from 82 monitoring
wells, monthly analysis of VOC concentrations in groundwater from the five
pumping wells (4 monitoring wells and 1 public water supply well), and
quarterly or annual analyses of groundwater from 25 monitoring wells, 5
public water supply wells, and 7 private water supply wells. Evaluation of
groundwater level and groundwater quality data collected thus far
demonstrates that the pumping wells have contained the VOC plume.
Next Steps:
IBM continues to implement the full remediation program including
groundwater pump and treat, soil vapor extraction system, and groundwater
monitoring.
Although a five year assessment report is not required until April 2001, IBM
submitted three workplans in 1999, in response to EPA’s request.
1. Vapor Extraction System Shutdown Investigation Workplan
This workplan was requested because IBM has observed diminished removal of
PCE through the system and is considering eliminating the system. EPA
requested, and IBM submitted a plan, to determine whether shut down of the
vapor extraction system (VES) will impact groundwater contamination or air
quality and whether continued mass removal by the VES is insignificant
relative to IBM’s ability to meet the remediation goals. In December of
1999, EPA provided comments on this workplan to IBM. IBM submitted a
revised Workplan in April, 2000. EPA is reviewing IBM’s submittal.
2. Groundwater Plume Characterization Workplan
While previously uncontaminated wells are routinely monitored to ensure
that the contaminated groundwater plume is contained, IBM has not
monitored the perimeter of the plume since 1992. EPA requested IBM to
assess the plume size to complete a review of the remediation program.
Since EPA made this request, and IBM submitted a Workplan, EPA has focused
its resources on addressing risks and has deferred this portion of IBM’s
assessment.
3. Corrective Measures Review Workplan
EPA requested this workplan because IBM has determined that the current
remedy is not substantially reducing the concentration of contaminants in
the groundwater at one localized area, and also, in the next several
years, Prince William County plans to discontinue pumping the principle
well which has drawn the contaminant plume three miles from its source.
Since EPA made this request, and IBM submitted a Workplan, EPA has focused
its resources on addressing risks and has deferred this portion of IBM’s
assessment.
Site Description:
In 1969, IBM began operating a 600-acre facility located in north central
Virginia, approximately 25 miles southwest of Washington, DC. The principal
activities at the Facility were semiconductor design and the manufacturing
and development of electronic defense systems. Although IBM continues to
retain the responsibility for RCRA corrective measures implementation at the
Manassas facility, the facility now contains portions owned and operated by
other businesses, including the Lockheed Martin Corporation and Dominion
Semiconductor.
Through investigations implemented by IBM from 1978 through the
early-1980's, IBM identified the presence of elevated volatile organic
compounds in onsite soils and groundwater. As a result of the initial
investigations, IBM removed one 10,000-gallon waste solvent tank and two
20,000-gallon waste acid tanks, closed two underground tanks and associated
appurtenances, removed 1227 tons of contaminated soil which were disposed in
an EPA-approved hazardous waste landfill, treated soil to raise the pH in
contaminated soils and immobilize fluoride, and installed 49 onsite wells
and 45 offsite wells to monitor groundwater. Subsequently, IBM provided
city (Manassas) water hookups to five (5) residences, assisted the Prince
William County Service Authority in installing and monitoring a groundwater
treatment system for its public supply well, implemented a groundwater pump
and treat system, and implemented a pilot soil vapor extraction system.
On March 1, 1989, EPA and IBM entered into a Consent Order requiring IBM to
complete its onsite and offsite investigation of the nature and extent of
the contamination and conduct a study to evaluate various cleanup
alternatives. The requirements of the order were satisfied with EPA’s
approval of the CMS Report on March 8, 1990. The final remedy selected by
EPA on July 25, 1990 provided for the addition of one offsite pumping well
to the existing groundwater pump and treat system and continued the pilot
soil vapor extraction system. Cleanup goals were established for the
pumping wells based on Maximum Contaminant Levels (MCLs) and 10-6 cancer
risk-based levels. MCLs are federally enforceable drinking water standards
developed under the Safe Drinking Water Act which are published at 40 C.F.R.
Part 141, Subpart B. The 10-6 cancer risk-based level represents the
concentration of a carcinogen such that a person of average weight drinking
two (2) liters/day of water containing 0.67 micrograms/liter of the
contaminant would have no more than a one (1) in one (1) million chance of
developing cancer from drinking the water during a 70 year lifespan. EPA
acknowledged that it may be technically impossible to achieve these cleanup
goals and provided that IBM may petition for alternative goals in the future
(as long as drinking water from the Prince William County Well and possibly
from the new offsite well was treated to levels no less stringent than an
MCL). On February 11, 1991, EPA and IBM entered into a second Consent Order
requiring IBM to implement the selected remedy. As a result of local
approval requirements, the new offsite pumping well did not begin operating
until August, 1997.
Clean-up Indicators
Under the Government Performance and Results Act (GPRA), EPA has set
national goals to
address high priority RCRA corrective action facilities by the year 2005.
EPA is evaluating two key indicators for each facility: Current Human
Exposures Under Control and Migration of Contaminated Groundwater Under
Control. The IBM Manasassas Facility is one of EPA Region III's high
priority facilities and falls under this initiative. EPA's current
evaluation of Environmental Indicators for the IBM Manassas Facility is as
follows:
Human Exposures Controlled Determination: Human Exposures are controlled
at this time.
Release to Groundwater Controlled Determination: Groundwater is controlled
at this time.
Threats and Contaminants:
The principle contaminants in soil and/or groundwater associated with
releases from IBM’s operation of the plant and breakdown products from the
releases are perchloroethylene (PCE), trichloroethylene (TCE), and 1,2-trans
dichloroethylene (trans 1,2-DCE). The compound 1,1,1-trichloroethane (1,1,1
TCA) is also in onsite and offsite groundwater and possibly originated from
an offsite source. These chemicals are all in a class of chemicals called
“volatile organic compounds” or VOCs. The MCL identified in the final
remedy is 5 ppb for PCE, 5 ppb for TCE, 70 ppb for trans 1,2-DCE, and 200
ppb for 1,1,1 TCA. The 10-6 cancer risk-based level in drinking water that
is identified in the final remedy is 0.67 parts per billion (ppb) for PCE
and 3 ppb for TCE. The compounds trans 1,2-DCE and 1,1,1 TCA are toxic to
the body but do not induce cancer.
Community Interaction:
EPA solicited public comments on the preliminary identification of the final
selected remedy for 30 or more days during March and April of 1990. Two
comments were received. IBM opposed the requirement to meet a cleanup goal
for 1,1,1 TCA because it is not believed that IBM is the source of the 1,1,1
TCA in the groundwater. EPA retained the cleanup goal for 1,1,1 TCA because
IBM’s recovery wells had caused the compound to migrate onto IBM’s property.
A citizen concerned with property values, environmental effects, and public
safety opposed the selected location for the additional offsite well. IBM
resolved this issue by working with the residents to design and develop a
housing for the well pump and treatment system which met their approval.
More Information:
For more information about this project, please contact:
Information Repositories
The following information repository contains documents related to the
investigation and cleanup of the IBM Manassas Facility:
Location: U.S. EPA Region III, RCRA Administrative Record (3WC23)
Address: 1650 Arch Street, Philadelphia, Pennsylvania 19103-2029
Phone Number: (215) 814-3430 or (800) 352-1973 extension 43430
RCRA Project Manager: Diane Schott (3WC23)
Phone Number: (215) 814-3430 or (800) 352-1973 ex. 43430
Facsimile: (215) 814-3113
Electronic Mail: schott.diane@epa.gov
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