consulting engineers and scientists€¦ · •centerpiece of town •historic structures...
TRANSCRIPT
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TAB Technical Assistance
for Brownfields
Team Member
Introduction to
Brownfields:
Site Assessment
and Cleanup
consulting engineers and scientists
Presented by: Barry Giroux, P.E., LEP, Senior Project Manager
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• Under-used industrial or commercial
properties
• Often abandoned because of perceived
environmental contamination
• Commercial properties
• Mills
• Warehouses
• Factories
What is a Brownfield?
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• Protects human health and the environment.
• Increases the tax base in the local area.
• Restores or replaces dilapidated buildings and facilities.
• Strengthens central economic centers.
• Creates jobs.
• Utilizes existing infrastructure.
• Encourages inner city investment.
• Reduces suburban sprawl.
• Prevents the spread of the
contaminants.
Benefits of Brownfields Redevelopment
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• Environmental liability
– Manage liabilities associated with contamination
• Financial barriers
– Additional cost to development
– Cleanup costs greater than property value
– Lenders hesitant to finance
• Cleanup may add to
development timeline
• Reuse planning
Key Challenges
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Key Players
• State Environmental Agencies
• State Economic Development
and Planning Agencies
• Commercial Lenders
• Technical and Environmental
Consultants
• Legal Counsel
• Citizens and Community
Groups
• Local Government Agencies
• United States Environmental
Protection Agency (EPA)
• Developers
• Local Community
Development Corporations
(CDCs)
• Federal Government Agencies
– HUD
– ACOE
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• Operations that uses raw material to
manufacture products:
– textiles;
– pulp, paper, and paperboard;
– wood products for construction;
– iron and steel for construction.
• Process:
– cotton, wool, and other raw fibers;
– wood and wood fiber, both virgin and recycled; and
– iron, ore, coal, and metal scrap.
Mills
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• Centerpiece of town
• Historic structures
• Readily accessible to
transportation
• Existing utilities and
infrastructure
• Large
• Multiple tracts of land
• Water bodies and rivers
• Opportunity for waterfront development
• Long development time periods
Characteristics of Mills
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• Textile
– Mercury
– Polychlorinated
biphenyls (PCBs)
– Lead and other metals,
– Volatile organic
compounds (VOCs)
– Asbestos
– Petroleum
Types of Contamination at Mills
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• Paper mills and wood
products
– Wood treating chemicals
– Creosote
– VOCs
– Dioxins
– Lead
– PCBs
– Petroleum
Types of Contamination at Mills
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• Iron and steel
– Lead
– PCBs
– Petroleum
– Slag
– Asbestos
Types of Contamination at Mills
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• Railroad lines and spurs – Polyaromatic
hydrocarbons (PAHs)
– Lead
– Pesticides
– PCBs
• Underground storage tanks (USTs) – Fuel oil
– Gasoline
Types of Contamination at Mills
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• Goal: Identify “areas of recognized environmental concerns”
• Paper Search
• Historic Information
• Interview
• Site Visit
• Areas of Environmental
Concern (AOEC) – Historic use, USTs, metal
finishing, dry cleaners,
types of manufacturing
Phase I Due Diligence
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• Leaking USTs – Fuel
– Gasoline
– Chemicals
• Contaminated fill
• Contamination from historic process
• Dry wells, drums, dumping
• Building contaminants – Asbestos
– Lead paint
– Mold
– PCBs
Sources
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• Soil
• Groundwater
• Sediment
• Surface Water
• Soil Gas
• Indoor Air
• Building Materials
Media
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• Subsurface Investigation
– Soil borings/test pits/monitoring wells
– Soil and groundwater testing
– Soil gas testing
• Sediment and surface water
sampling
• Indoor air testing
• Building materials
Field Investigation
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Test Pit Excavation
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GeoProbes
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Monitoring Well Installation
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Water Supply Well Sampling
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Soil Vapor Sampling
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Indoor Air Sampling
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• Asbestos
– Pipe and boiler installation
– Suspended ceiling tiles
– Wallboard and joint compound
– Caulking and glazing
– Mastic
– Floor covering and tiles
• Lead-based paint
• Mold
• Mercury
Building Materials
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• Construction between 1950s and late 1970s
• Caulking and grout in floor and wall joints
• Oil-based paint coating floors and walls
• Mastic and adhesives used under flooring (tiles and carpets)
• Sealants and finishing used on flooring
• Gaskets around windows and doors and in heating, ventilation, and air conditioning systems and ducting
• Window glazing
• Roofing and siding
Where PCBs are in Building Materials
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• Ceilings
• Electrical equipment/fixtures
• Elevator shafts
• Expansion joints
• HVAC Equipment
• Masonry joints
• Painted surfaces
• Porous surfaces
• Roofs
• Underlying soils
• Window and door frames
What Materials are Likely Affected
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• Remedial Action Plan
– Establish Cleanup Goals
– Determine if institutional control are required
– Estimate Cleanup Costs
• Soil Cleanup
• Indoor Air
• Building Materials
– Demolition
– Restoration
Cleanup and Development
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• Soil
– Excavation and
off-site disposal
of soil
– Encapsulation
– On-site
treatment
How to Cleanup a Mill
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• Indoor air
– Vapor intrusion from
solvents or gasoline
– Sub-slab
depressurization
systems
How to Cleanup a Mill
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• Abate asbestos, lead paint and PCBs
– Significant costs
– Asbestos abatements are state regulated
– PCB abatements are federally regulated and
approved
– Remove
– Encapsulate
Building Cleanups
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• Demolition Debris Management
– Abate asbestos, lead paint and PCBs prior to
demo
– Asphalt, brick, and concrete
• Crush and reuse onsite for backfill, grading and
roadway bedding
Building Cleanups
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• Textile Mill
• 6.5 acres
• 140,000 square feet (sq ft)
• Railroad easement
– Lead and PAHs
• Asbestos in building
• USTs and petroleum
• Transformer
• 64 Affordable residential units
• 18,000 sq ft commercial
• Riverfront greenspace
Cohannet Mill, Taunton, MA
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Forest City, Cumberland, RI
• Phase I and Phase II Due
Diligence
• Part of Peterson-Puritan
Superfund Site
• Arsenic, lead, PAHs, oil in
soil. Encapsulated to prevent
exposure
• Deed restriction
• PCB-contaminated building
debris
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MASS MoCA, North Adams, MA
• Textile Mill
• National Historic Register
• 13 Acres
• Electronics Manufacturer
• PCBs, trichloroethylene (TCE)
and heavy metals
• Soils excavated and capped
• Largest center for
contemporary arts
• 19 galleries, 100,000 sq ft
exhibit space
• 60,000 sq ft office and retail
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• Textile Mill
• Heart of city’s downtown
• Lead-contaminated soil,
asbestos, lead paint
• Asbestos and lead paint
abatement
• Soil capping
• Residential / commercial
North Dam Mill, Bidderford, ME