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Example
Projects
Site
Characterization & Soil Remediation Cost Reduction,
Proposed Police Station, Plainville, CT HRP
Associates, Inc. conducted Phase I, Phase II, and Phase III site
investigations for the Town of Plainville on a two-acre lot which
had historically been filled with contaminated soils. Site
investigations defined substantial portions of the site exceeding
DEP numeric soil remediation criteria applicable to GA groundwater
classification areas. However, no impact to groundwater was
demonstrated, and an area receptor survey documented no water supply
wells at risk.
HRP prepared a remedial cost estimate for the site and these figures
were integrated into a site development plan which featured the
construction of a new Plainville police facility.
In November 2000, the Town of Plainville voted to allocate
the necessary funding for this project.
An HRP Licensed Environmental Professional (LEP) was retained
by the Town of Plainville to prepare a remedial action plan (RAP)
and remediation contractor bid document, to assist with contractor
selection, and to supervise the implementation of the RAP.
Throughout
the project, HRP worked closely with the Police Station Siting
Committee and the architectural firm to cost-effectively coordinate
the remediation approach with the redevelopment plans. In addition
to meetings with the Town Council and testimony at public hearings,
HRP also coordinated the remedial planning with the CT DEP.
HRP obtained approval for a remedial approach which was
protective of human health and the environment, but at the same time
reduced the requirements and associated costs for soil remediation
by 20%. This cost reduction was achieved by the creation of a
perimeter “buffer zone” of clean material.
Cost
reductions were achieved through relocation of contaminated soils
removed from the buffer zone to locations within interior portions
of the site, and excavation of clean soil from the proposed facility
basement for placement as buffer zone backfill (to eliminate the
need for imported fill). The remedial plan was implemented on an
expedited schedule to facilitate the impending construction
start-up.
Brownfields
Redevelopment Project,
Former Gasoline Station, Glens Falls, NY Due
to limited parking, the city of Glens Falls, New York was interested
in purchasing a vacant parcel that abutted City Hall.
However, a historical review of the vacant parcel determined
that the parcel was occupied by a gasoline filling station from the
1940’s to the 1970’s. In
addition, limited information was available regarding the status of
potential on-site underground tanks and the condition of the
site’s soils and groundwater.
Due to the unknown
environmental condition of the site, a site investigation was
necessary determine if contamination was present on-site, which the
city, rightfully, did not want to take responsibility.
Therefore, to fund the investigation, HRP assisted Avalon
Associates, Inc. in preparing an Environmental Restoration Project
Application under the Clean Water/Clean Air Bond Act to obtain a
grant to fund up to 75% of the investigation costs of the site
investigation.
The
city’s application was approved in 1999, and the site
investigation began in the winter of 2000 once the NYSDEC approved
the site’s Work Plan.
Brownfields
Redevelopment Project,
Former Steel Foundry, Easton, PA
HRP Associates, Inc. is conducting a remedial investigation at a former
100-year old steel foundry slated for demolition and commercial
development. The work is being conducted pursuant to
Pennsylvania’s Land recycling Program (Act2). The 34-acre site
consists of the 29-acre foundry and an adjacent five-acre automobile
dealership.
A Phase II ESA identified 19 potential areas of concern including
overall site-wide groundwater. The
investigation was conducted in a phased manner with each phase of
work building upon prior results.
A total of 25 bedrock wells and over 200 Geoprobe® soil
sampling locations were installed. Additional investigation
techniques included the use of hollow stem augers drilling, back hoe
test pits, and storm water system dye testing.
Air
rotary drilling methods were used to install monitoring wells in the
limestone bedrock to a depth of up to 200 feet. In some locations,
telescoping casing was used to case-off mud-filled voids.
In one location No.2 fuel oil free product was found on the
water table surface at a depth of 110 feet.
A free product skimming system was designed by HRP to remove
the product to the extent practical. Geoprobe® technology was used
to quickly assess soil quality beneath the foundry building floors
as well as to determine the lateral and vertical extant of foundry
sand disposed of on site. An
asbestos building material survey was also conducted.
The
results of the investigation were used to develop a site conceptual
models that depict source areas, migration pathways, exposure
points, and potential receptors. The models well be used to support
the selection of appropriate clean up standards for soil and
groundwater. The data has also be used to develop five DEP remedial
work plans designed cleanup identified areas of contamination
including the free product, asbestos removal, drum area cleanup, PCB
oil removal and foundry sand capping.
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Brownfields
Redevelopment Project,
Waterfront Park, New London, CT
Connecticut Real Estate Exchange
Blue Ribbon Award Recipient 2002
The
city of New London is currently constructing a waterfront park on
the Thames River immediately south of the local railroad station.
The property was a former railroad maintenance yard, dating
back to the late 1800s. Several environmental investigation reports
were completed for the city in the 1980s and 1990s which identified
significant petroleum contamination on the ground surfaces,
extending down into the shallow water table and eastward along the
shoreline. 
During
construction of the piers for the elevated walkway in Winter 2000,
petroleum-contaminated soils were encountered at the river’s edge,
resulting in petroleum releases to the river. HRP worked closely
with U.S. Coast Guard, Connecticut Department of Environmental
Protection (DEP) Office of Long Island Sound Program and Urban Sites
Remediation Program, and the City of New London and its contractors
to implement a mitigation plan for preventing further releases into
the surface waters.
HRP
researched and recommended the installation of a specialized filter
fabric which is designed to prevent oil migration but allows water
flow. The contaminated soils, rocks, and timbers associated with the
railroad yard along the shoreline were excavated and disposed
off-site. The filter fabric was placed so that it would be covered
by the stone revetment (rip rap) which is adjacent to and below the
elevated walkway.
All
work was completed on an accelerated basis to accommodate the use of
the park for OpSail 2000 in early July. A temporary stone dust layer
cap was placed over the unexcavated areas west to the railroad
tracks so the site could be utilized for the OpSail events.
Additional soils have been excavated and a ground water monitoring
system has been installed. The investigations, remediation, and
proposed additional work has been approved by DEP. The park is fully
operational for public use.
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Brownfields/Urban
Redevelopment Project,
Various Sites, Waterbury, CT
HRP Associates, Inc.
was retained by the Naugatuck Valley Development Corporation (NVDC)
to provide a full range of environmental services to assist in an
urban redevelopment project involving a proposed Arts Magnet School,
and an adjacent regional branch campus for UCONN. Funding for the
projects was through the Connecticut Department of Economic and
Community Development (DECD). The proposed Arts Magnet School will
also include the renovation of a large theater building (the
“Palace”), which has been vacant for over 10 years. HRP began
the project with the completion of Phase I reports covering all of
the parcels involved with the project. Phase II/III subsurface
investigations were subsequently conducted.
Remediation
of approximately 75,000 tons of petroleum and metals contaminated
soil was completed, via appropriate off-site disposal. Also,
numerous underground storage tanks were remediated (removed) from
the sites. The goal of the projects was to attain Connecticut
Remediation Standard Regulations (RSR) compliance, which has largely
been completed except for post-remediation ground water monitoring.
Construction is well underway on both the Arts Magnet School and the
UCONN Branch Campus.
In
addition, lead paint, asbestos, and microbial contamination surveys
were completed for the vacant Palace Theater with the finding that
abatement was necessary for all three of these building related
contaminants. In order
to make the building safe for entrance by untrained personnel, an
initial cleanup involving lead paint, asbestos, and microbial
contamination was put out to bid, overseen, and confirmed as
completed through clearance testing. Once plans were completed for
the structural changes to the theater, an abatement plan was
prepared and implemented for most of the remaining asbestos. Due to
the historic nature of the theater, some lead paint and asbestos
containing materials will be managed in place. Asbestos and lead
paint surveys were conducted for eight other buildings within the
project boundaries prior to their demolition.
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