Vinyl
Chloride Exposure
According
to EPA:
H.O.D.
LANDFILL EPA REGION 5
Lake County
Antioch
ILLINOIS
EPA ID# ILD980605836 Other Names:
CCD Landfill
Last Update: November, 2000 8th Congressional
District
-----------------------------------------------
Site Description
The H.O.D. Landfill is located in
Lake County, Illinois. The site occupies
about 121 acres, of which approximately
51 acres are the landfill. The site
is currently closed. There are approximately
14,300 people living within three
miles of the site. Approximately 40
private wells and 6 public water supply
wells are in the vicinity and are
used for domestic water purposes.
The site is adjacent to a freshwater
wetland. Sequoit Creek is adjacent
to the landfill, and flows into a
series of lakes used for recreation.
An industrial park, constructed on
former landfill areas unrelated to
the site, is located west of the site,
across Sequoit Creek. The landfill
is divided into the "old landfill"
and the "new landfill."
Operations began in the old landfill
in 1963, when wastes were placed in
excavated trenches that were covered
with excavated materials from each
subsequently dug trench. Operations
in the new landfill began in 1975,
and included construction of a clay
barrier between the old and new landfills,
and the installation of a leachate
collection system. The new landfill
was closed in 1984, and the entire
landfill was covered with a continuous
clay cap. Refuse thickness ranges
from 12 to 64 feet, with a total estimated
in-place volume of 1.5 million cubic
yards of waste at the site.
Site Responsibility: This site is
being addressed through Federal and
potentially responsible parties' actions.
NPL Listing History: Proposed Date:
09/18/85
Final Date: 02/21/90
-----------------------------------------------------
Threats and Contaminants
The primary threat to human health
is through the ingestion of vinyl
chloride-contaminated groundwater.
Vinyl chloride contamination has appeared
in a monitoring well, nearby and down
gradient of the site.
-----------------------------------------------------
Cleanup Progress
Under U.S. EPA Region 5 oversight,
the potentially responsible party
(PRP) performed a Remedial Investigation,
detailing the nature and extent of
contamination. This work was performed
as a result of a 1990 Administrative
Order on Consent (AOC) between U.S.
EPA Region 5 and the PRP that directed
the PRP to perform an Remedial Investigation
and Feasibility Study (RI/FS). As
part of this work, the PRP replaced
a municipal well, down gradient of
the site. Contamination of this well
was one of the main reasons the site
was placed on the National Priorities
List (NPL). The PRP completed the
Final RI Report in January, 1997,
after receiving much input from the
Region and the Illinois Environmental
Protection Agency (Illinois EPA).
Region 5 and Illinois EPA received
and commented on the PRP's Draft FS,
and the Region approved the FS in
June, 1998.
Region 5 issued the Proposed Plan
to the public in July, 1998 and held
a public meeting in Antioch in August,
1998. Region 5 issued the Record of
Decision (ROD) on September 28, 1998.
The selected remedy includes containment
of contaminant migration through leachate
and gas extraction, waste cap improvements,
and groundwater-monitored natural
attenuation.
After
an unsuccessful effort to have the
PRP sign an AOC for the Remedial Design
and Remedial Action (RD/RA), Region
5 issued a Unilateral Administrative
Order to the PRP in April, 1999, to
perform the RD/RA. The PRP began the
RD in May, 1999, regions approved
the RD in August, 2000. The PRP began
construction in August, 2000 and should
finish in calendar year 2001. After
construction is complete, the PRP(s)
will be responsible for long-term
maintenance and monitoring of the
site.
|
