Cleanup
In early 1997, it was discovered
that elevated levels of site contaminants extended several feet beyond the
old fence line along the northern end of the property. Land use north of
the property is residential.
In the spring of 1997, EPA entered
into an
agreement
with the site owner under which the owner erected a new fence as an
interim measure that now prevents people from coming into contact with
these contaminants.
EPA entered into an agreement with
seven potentially responsible parties, including Allied Signal, FMC,
Novartis, Olin, Shell Oil, Union Carbide, and Wilmington
• Securities, to conduct a remedial
investigation and feasibility study (RI/FS) at the site. These cooperating
companies have notified EPA that an additional seven companies including the site owner, Central Chemical, have
joined the group.
• In February 2003, the Remedial
Investigation/Feasibility Study (RI/FS) work plan was completed.
• In 2004, the majority of the
environmental sampling at the site was completed.
Samples were collected of site soil,
groundwater,
and storm water. In addition, samples
were collected from surface water and sediment from the nearby Marsh
Run and Antietam Creek.
• Sampling confirmed that pesticides
and metals present at elevated levels in surface soil across the site, and
high concentrations of pesticides and metals have been buried in a
disposal area in the north end of the property "Former Waste lagoon." To a lesser degree, pesticides were also
detected in storm water leaving the
site
and in surface water and sediment samples from Marsh Run and Antietam
Creek.
• Groundwater contamination has moved
beyond the property boundaries and additional wells were installed and
sampled in 2006/2007 to better determine the extent of off-site
groundwater contamination.
• During the Spring and Summer of
2005, all former pesticide and fertilizer manufacturing buildings were
decontaminated, demolished and dispose of in an appropriate manner.
• In December 2006, the
Potentially Responsible Parties (PRP) provided EPA with the final Remedial
Investigation (RI) for the site. The final RI for on-site soil and waste
is complete.
• Groundwater contamination has been
confirmed to extend beyond the boundaries of the Central
Chemical property. Therefore, further delineation of groundwater contamination may be necessary.
• In 2006, the PRP provided EPA with
early portions of the Feasibility Study (FS), which evaluates the best
cleanup options for the site.
• In 2007, the first draft of the
feasibility study was completed and provided to EPA.
• In 2009, a Proposed Plan, describing
EPA's preferred cleanup alternative for the site
soils
and wastes, was issued.
• In September 2009, EPA issued a
Record of Decision (ROD) for contaminated soils and waste at the site. The
ROD includes on-site solidification/stabilization of a former waste
lagoon; excavation, consolidation, and capping of contaminated soils; and
the installation of a ground water extraction and treatment system.
• In 2011, the PRP’s began fieldwork
for the OU-1 PDI, which included trenching in areas of concern,
investigation of the liquid pesticide building and other hot spot
• characterization of the former
lagoon landfill for the for the S/S Treatability Study; and installation
of monitoring and recovery wells around the former lagoon in preparation
of aquifer pump tests.
• In 2014, Remedial Design activities
for the OU-1 remedy began. The OU-2 investigation
of the bedrock groundwater is in progress.