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Environmental Site Assessment, Power Plant Facility,
Hartford, CT
HRP Associates, Inc. conduced an expedited, pre-divesture
evaluation of potential environmental liabilities resulting from
a century of power generation operations at this 90-acre parcel.
Six hundred soil and ground water samples were collected from
test borings, test pits, and ground water monitoring wells and
analyzed to characterize PCB, solvent, fuel oil, jet fuel, and
mercury releases, on-site waste stockpiles, off-site impacted
Connecticut River sediments, and on-site subsurface disposal
areas. Soil and ground water contaminant data was migrated into
ArcView, a Geographic Information System (GIS) database utilized
to aid in the definition and evaluation of 45 discrete
contaminant management areas.
The comprehensive investigation and remedial action planning was
performed on an accelerated schedule in order to define
remediation costs prior to successful property transfer. The
resulting liability assessment, remedial action plan, and
remediation cost estimate also facilitated the acquisition of
environmental cost cap insurance which was a required component
of the property transaction. Ancillary investigations included
evaluation of asbestos, PCB-containing equipment, lead and other
contaminated dust residues, and residual mercury contamination
associated with a historic boiler, including assessment of post
property transfer abatement costs for these items.
Environmental Site Assessment, US Coast Guard Air Station,
Brooklyn, NY
An Environmental Assessment (EA) was completed in accordance
with the Council on Environmental Quality and National
Environmental Policy Act (NEPA) regulations due to the proposed
closure of the U.S. Coast Guard Air Station Brooklyn in
Brooklyn, New York. Both the positive and negative environmental
and socioeconomic impacts of closing the air station and
relocating personnel were discussed.
The following are some of the areas researched and analyzed with
respect to the air station closure: land use; coastal zone
management; infrastructure; population and demographics; local
economy; housing; public services; Coast Guard operations;
hazardous material and waste management; noise; air quality and
climate; geology and soils; water resources; wildlife; sensitive
species and habitats; historic resources and prehistoric/Native
American resources.
The EA found no significant impacts due to the proposed air
station closure and, as a result, a Finding of No Significant
Impact was issued.
Environmental Site Assessment, Manufacturing Facility,
Lincoln, NH
HRP Associates, Inc. was retained by an international electrical
manufacturer to complete an environmental site contamination
assessment at a manufacturing facility site in northern New
Hampshire. HRP subsequently performed several phases of
hydrogeological investigations to define soil and groundwater
contamination (both overburden and bedrock aquifers).
Subsequently, HRP designed, pilot tested, and installed a plume
control and groundwater treatment system. HRP prepared a Site
Investigation Report and Remedial Action Plan pursuant to NH DES
regulations (ENV-WS 410) and is currently managing groundwater
contamination at the site under a Groundwater Management Permit
(GMP). HRP has recently performed a pilot test of a Vacuum
Enhanced Multi-phase Recovery (VEMR) system to address a second
on-site plume of VOC ground water contamination in the
overburden and shallow bedrock aquifers.
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Other site
activities performed by HRP include an Environmental
Compliance Audit and Stormwater Discharge Evaluation.
HRP has investigated and remediated a former on-site
hazardous waste landfill and designed, pilot tested and
installed two soil venting systems to address volatile
organic soil contamination. |
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HRP is presently monitoring all environmental treatment systems
and groundwater quality under the GMP and reuse of treated
ground water in the plant prior to discharge to the local STP.
Environmental Conditions Investigation, Former Foundry, New
London, CT
HRP was retained to investigate the environmental conditions at
this site, which is associated with the redevelopment of the
Fort Trumbull peninsula. Historically, the site was utilized for
a foundry. In recent years, it was the location of a furniture
stripping operation and, therefore, is subject to the
Connecticut Transfer Act (Connecticut General Statutes, Sections
22a-134 et seq.) upon its future sale. Since the Connecticut
State Department of Economic and Community Development (DECD)
and Department of Environmental Protection (DEP) are involved in
the redevelopment process of the Fort Trumbull area, the DEP
retained responsibility for the review and approval of the
environmental investigations and remediation of this parcel.
HRP’s responsibilities included the investigation and
remediation of a number of contaminant source areas on the
property: underground and aboveground storage tanks; floor
drains, sumps, and piping; petroleum and chlorinated solvent
contaminated soils; waste deposits within the building and slag
material generated from the foundry which was buried on-site.
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We have
worked closely with DEP and have received approval for
the technical reports required for the Transfer Act
requirements. A ground water investigation plan which
included the installation of bedrock monitor wells has
been approved by DEP. Monitoring is on-going. |
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Phase I/II/III Site Characterizations, Former Electrical
Connector Manufacturer, Norwalk, CT
HRP Associates, Inc. performed Phase I, Phase II, and Phase III
site characterizations of a 12-acre former industrial
manufacturing complex in Norwalk, CT in anticipation of property
transfer and redevelopment. The site investigations included the
installation of over 50 monitoring wells to characterize
complicated overburden and fractured bedrock flow regimes and
solvent plume migration. Machine excavated test pits,
geophysical seismic refraction profiles, building interior soil
gas surveys, and off-site private water well supply sampling
events were utilized to supplement and focus the hydrogeologic
investigation. These investigations identified 18 on-site
contaminant source areas, including dry wells, leaching fields,
underground storage tanks, and surface releases.
Following review of an Environmental Condition Assessment Form (ECAF)
prepared by HRP, the CT DEP determined that site investigation
and remediation activities could be overseen by a Licensed
Environmental Professional (LEP). In 1998 and 1999, an HRP
Project Management Team, including two LEPs, supervised the
remediation of each source area. Several thousand tons of
contaminated soils and structures were removed and appropriately
disposed off-site in order to prepare the site for immediate
demolition of existing buildings and redevelopment.
HRP’s technical services at the Norwalk site have included site
characterization, remedial design, remediation bid document
preparation, remedial contractor management, post remediation
sampling, and LEP oversight. Additionally, HRP’s support of the
site redevelopment included coordination with the Norwalk
Conservation Commission, testimony at public hearings, DOT
permitting for off-site investigation and remedial action,
public notice of remediation, DEP permitting for dewatering
discharges, coordination of the extension of municipal water
supply lines to nearby residences, and close coordination with
the site demolition and redevelopment concerns.
Construction of multiple retail buildings at the site began in
the summer of 2000. Throughout this process, HRP has worked
closely with the construction team and architects to facilitate
the installation of the post-remediation monitoring well network
on an area-by-area basis, as construction allows. The monitor
well network has been completed and post-remediation monitoring
began in the summer of 2001, shortly after redevelopment
construction was completed.
On-going Site Remediation with Additional Investigation,
Construction Company, Upton, MA
HRP conducted subsurface hydrogeological investigations on
various portions of the site. Soil and ground water
contamination were identified in the areas of a floor drain
discharge dry well, an aboveground diesel/fuel oil-dispensing
pump, and former underground gasoline tanks. Subsequently, a
120-day Release Notification Form and RAM Plan were prepared by
HRP and submitted to MA DEP. The RAM Plan detailed an excavation
source removal with off-site recycling of the soil and ground
water monitoring.
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HRP began
the soil remediation under the MCP RAM Plan, which
included the excavation of the soil, collection and
analysis of confirmatory soil samples, and iterative
soil removal and sampling until the contaminated soil
was completely removed. |
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The investigation also included additional subsurface
investigation to determine the possible source of sediment and
ground water contamination within a stream that flows through
the site.
Currently, HRP is investigating additional areas of
contamination found beneath former bulk petroleum aboveground
storage tanks, and inside vehicle garage bays with unpaved
floors. Additional soil will be excavated from the former AST
area, and the extent of sub-floor contamination in one of the
garage bays is being defined.
On behalf of the owners, HRP has obtained a Tier 1C
Classification Permit for the site. An ecological risk
assessment was conducted for the on-site stream and the
semi-volatile compounds detected in the stream sediment. It was
determined that a condition of no significant risk to human
health and the environment existed.
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