Southeast Rockford Groundwater Contamination Superfund Project
Source Area 4
Purpose of this fact sheet: This fact sheet describes the status
of work at four major sources of groundwater2 contamination
found in the Southeast Rockford Groundwater Contamination Superfund5 Site. The
map below shows the location of these four major source areas.
Status: Since the 2002 Record of Decision4,
the Illinois Environmental Protection Agency (Illinois EPA) has conducted
additional investigations in Source Area 4. The purpose of these investigations
was to collect information needed to design the Area 4 remedy specified in
the Record of Decision.
Investigation results showed free product1 and
contaminated soil near the building and closer to the surface than expected. The
Illinois EPA removed 185 cubic yards of this soil on September 15 and 16, 2005.
Removing these soils and free product was necessary to prevent human exposure.
Removal also has the immediate effect of reducing movement of contaminants off
site in groundwater. The contaminated soil was taken to an appropriate off-site
In October 2005, the Illinois EPA installed five additional monitoring wells.
One monitoring well was installed on site; two were installed on Marshall
Street and two on the northwest side of the drainage ditch.
Next steps: Within the next month or two, the Illinois
EPA will install a temporary system on site to determine the amount of groundwater
that will have to be pumped and the rate at which the groundwater will have
to be treated. This action is called a pump test and will last from three to
six days. At the same time, the Illinois EPA will test the treatment system
for the leachate3. This pilot test will last about three weeks. Construction
of the remedy is planned for the fall of 2006.
Source Area 7
Status: The Illinois EPA has conducted supplemental
investigations in Area 7 during 2004 and 2005. The purpose of these investigations
was twofold: (1) to define the extent of contamination north of Ekberg/Pine
Manor Park and (2) to evaluate the groundwater quality in the planned location
of the leachate extraction well system. Information from these investigations
will be used to design the remedy.
Predesign investigation results: Investigations
included an additional soil gas survey, installation of four new monitoring
wells and the collection of subsurface soil samples. The soil gas survey
indicated that Area 7 source area extends approximately 100 feet north of
Ekberg/Pine Manor Park in the general vicinity of the small valley running
north and south.
Soil samples revealed the presence of free product and elevated concentrations
of volatile organic compounds (VOCs)6 just north of the park. Additional
soil sampling is required to define the extent of subsurface VOC contamination
south of the basketball court in the park. Previous investigations and aerial
photographs show, however, that subsurface soil contamination stops well
before the location of houses in the Pine Manor Subdivision.
Results of the groundwater investigation indicate that the groundwater contamination
may extend further to the south than previously believed. This groundwater
contamination, however, does not affect the drinking water of those residents
connected to the Rockford Public Water Supply. The city of Rockford routinely
tests the public water supply wells and water distributed to the public has
regularly met all U.S. EPA drinking water standards for contaminants associated
with this site. Residents should have received a notice from the city of
Rockford about a violation of the U.S. EPA drinking water standard for radium.
Radium is naturally occurring and is not associated with
the contaminants found at this site. The radium exceedance is slight and
the standard is set to be protective of consumption over 70 years. The city
has entered into a compliance agreement with the Illinois EPA to demonstrate
compliance with the radium standard by 2009.
Next steps: Actual construction of
the remedy depends upon the Agency obtaining access to property not owned
by the Park District. The Illinois EPA is continuing to work with the Rockford
Park District on issues related to the Remedial Design and Remedial Action
in Source Area 7.
Before the finalization of design documents, the Illinois EPA
will also consult with Pine Manor Subdivision representatives as promised
in the 2002 responsiveness summary. The Illinois EPA will work with the Rockford
Park District and the Pine Manor Association in determining the location
of the treatment building and the type of construction materials for the
building. Since there are several different interests involved, the Illinois
EPA cannot guarantee approval rights to any one party but intends to work
with both parties to reach an agreement, if possible, that satisfies both,
as well as satisfying the goal of an effective remedy.
Source Area 9/10
Background: In a 2003 Administrative Order on
Consent, Hamilton Sundstrand agreed to conduct additional investigations
in Source Area 9/10 and prepare the design for the Source Area 9/10 remedy
designated in the 2002 Record of Decision.
Status: Hamilton Sundstrand has conducted tests
on the soils in Area 9/10. Test results show that soil vapor extraction should
work well in removing contaminants from the subsurface soil.
- Hamilton Sundstrand has proposed to conduct an additional pilot study
to determine if horizontal drilling for deployment of the 2002 Record of
Decision technologies can effectively remove contamination in soil near
or under the production buildings in Area 9/10.
- Hamilton Sundstrand investigations have shown that most of the soil contamination
in a former outside storage area is within four to six feet beneath ground
surface. This outside storage area is located in the northwest portion
of the facility adjacent to the sidewalk east of 9th Street The U. S. EPA
and Illinois EPA with Hamilton Sundstrand may consider additional methods
of managing this soil that are not listed in the 2002 Record of Decision.
If additional methods are used but do not fundamentally alter the Record
of Decision, either the U.S. EPA or the Illinois EPA will publish a notice
of “Significant Differences” in the local newspaper describing
these changes. Fundamental changes to the Record of Decision would require
a public comment period on the proposed changes. Fundamental changes
in the Record of Decision are not being considered for Area 9/10 or the
other source areas of this project.
Source Area 11
Status: The Illinois EPA has applied to the U.
S. EPA for funds to design the remedy specified for Source Area 11 in the
2002 Record of Decision. This site will have to compete with Superfund sites
throughout the nation for the limited amount of Superfund dollars available.
If money is available, the Illinois EPA will begin design of the Area 11
remedy in 2006.
1Free product. A phase of a chemical in groundwater. When
a contaminant is present in high enough concentrations, it does not dissolve
in the water. Rather, if it is lighter than water (like oil), it will float
on top of the water. If it is heavier than water, it will sink through the
water until it comes to barrier such as rock or clay.
2Groundwater. Water beneath the ground surface.
3Leachate. Water that has passed through waste and picked
up contaminants present in the waste. In this fact sheet, the term leachate
refers to all contaminated groundwater within the groundwater management
zone boundary that is established for each source area.
4Record of Decision. A public document that explains which
remedies will be used to clean up a Superfund site. The U.S. EPA and the
Illinois EPA made the decisions about the remedies for the four major source
areas for this project after carefully considering all public comments received
during the public comment period. A copy of the Record of Decision for the
four source areas is located in the site repository at the Rock River Branch
of the Rockford Public Library.
5Superfund. The common name given to sites on the National
Priorities List (NPL). The NPL is a list of the nation’s most hazardous
sites that are eligible for investigation and, if necessary, a remedy under
the federal Comprehensive Environmental Response, Compensation and Liability
Act. The Southeast Rockford Groundwater Contamination Site was placed on
the NPL in 1989.
6Volatile organic compounds (VOCs). A class of chemical
compounds that are volatile and contain carbon. Volatile means the compounds
vaporize (evaporate) readily at normal indoor/outdoor temperatures. The compounds
are called organic because they contain carbon. The main contaminants found
at this site are industrial solvents and their breakdown products. These
chemicals are categorized as volatile organic compounds.
For More Information:
Contacts: For more information about the project including fact sheets
on the remedial investigation results, feasibility studies and proposed plans for
each of the four major source areas, you may contact the Illinois EPA staff listed
Community Relations Coord.
1021 N. Grand Ave. E.
Springfield, Illinois 62794-9276
Phone: (217) 524-2292
1021 N. Grand Ave. E.
Springfield, Illinois 62794-9276
Phone: (815) 223-1714
Repositories: Full reports for the project may be reviewed at the following
Rock River Branch
Rockford Public Library
3128 S. 11th Street
Rockford, IL 61109
(Call for hours)
|Ken-Rock Community Center
3218 S. 11th Street
Rockford, IL 61109
(Call for hours)
Administrative record file: The administrative record file is located at
the Illinois EPA headquarters in Springfield, Illinois. Call 217/782-9878 for an
appointment. The administrative record file will also be located on microfiche
at the Main Branch of the Rockford Public Library at 215 N. Wyman in Rockford.