Transcript Welcome to the International Right of Way Association’s

Welcome to the
International Right of Way Association’s
Course 603
Understanding
Environmental Contamination
in Real Estate
1
603-PT – Revision 4 – 04.30.08.CAN
Introductions
Who we are…
What we do…
Where we do it…
How long we’ve been doing it…
Our goals for the course...
2
Objectives
At the conclusion of the course,
you will be able to...
• Recognise situations that have the potential
for site contamination
• Identify common types of contamination
• Discuss potential implications of contamination
on the right of way and on the project
3
• Present options to manage or remediate
environmental contamination
Housekeeping
4
Schedule (1)
8:00 - 8:30
Introductions, Etc.
8:30 -10:00
Contamination and Contaminants
10:15 -11:15 Geology, Hydrogeology
and Hydrology
11:15 - 12:00 Contaminant Movement
1:00 - 2:00
5
Contamination Discovery
Schedule (2)
2:15 - 3:15
Contaminations Affects on the
Right of Way and on the Project
6
3:15 - 3:45
Options to Manage or Remediate
Environmental Contamination
3:45 - 4:00
Summary and Review
4:00 - 5:00
Exam
Definitions (1)
Contaminants are any physical, chemical,
biological or radiological substance or
matter that has an adverse effect on air,
water or soil.
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Definitions (2)
Hazardous substances are any materials
that pose a threat to human health and/or
the environment.
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Definitions (3)
A contaminated or hazardous waste site is a site
at which hazardous substances occur in
concentrations above background levels and
where assessment indicates the site poses, or
is likely to pose, an immediate or long-term
hazard to human health or the environment.
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Exercise No. 1(1)
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Exercise No. 1(2)
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Exercise No. 1(3)
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Exercise No. 1(4)
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Contamination Sources
Point Source
Non-Point Source
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Point Source Contamination(1)
Point Source
… a release from a small, specific
and usually identifiable area
• leaking storage tanks
• leaking buried pipes/transfer lines
• leaking lagoons
• landfill leachate seeps, leaking buried drums
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• spills
Point Source Contamination (2)
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Point Source Contamination (3)
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Point Source Contamination (4)
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Non-Point Source Contamination
Non-Point Source
… a release over a wide area
• fertilizer applications
• infiltration of ditch water
• sewage sludge applications
• particulate fallout
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Hazardous or Designated Substances
• Asbestos-containing material (ACM)
• Polychlorinated biphenyls (PCBs)
• Lead-based paints
• Mercury-containing equipment
• Urea formaldehyde foam insulation (UFFI)
• radioactive sources/radon gas
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Asbestos-Containing Material (1)
Popular from the 1900s to 1970s
• floor tiles and linoleum
• ceiling tiles
• thermal mud insulation on pipe elbows
• check boilers and boiler rooms
• transit boards
• asbestos cement drain piping
• spray on (fire retardant) insulation
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Asbestos-Containing Material (2)
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Polychlorinated Biphenyls (1)
Manufactured up to 1977
• coolants and lubricants in electrical equipment
(e.g., fluorescent light ballasts, fluid cooled
transformers, capacitors)
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Polychlorinated Biphenyls (2)
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Lead-Based Paint
Fully phased out in the early 1980s
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Mercury-Containing Equipment
• switches
• fluorescent light tubes
• mercury halide lights
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Urea Formaldehyde Foam Insulation
Used from the 1960s to about 1980
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Radioactive Sources/Radon
• older smoke detectors
• industrial sensors
• radon gas
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Geology
Geology is the science that deals with the
Earth, especially as recorded in rocks.
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Hydrogeology
Hydrogeology is a branch of geology
concerned with the occurrence,
use and functions of surface water
and ground water.
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Hydrology (1)
Hydrology is the science that deals with
the properties, distribution and circulation
of water on and below the Earth’s surface
and in the atmosphere.
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Hydrology (2)
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Subsurface
Sand and Gravel
Gravel
Sand
Clay
Bedro
ck
Til
l
Overburden
Bedrock
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Porosity
Pore space
Fractures
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Groundwater
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Groundwater Flow
Recharge Area
Recharge Area
Discharge
Area
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Permeability
Permeability is a material’s capacity to
transmit water.
An aquifer is a geological unit having
a high permeability.
As aquitard is a geological unit having
a low permeability.
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Exercise No. 4(1)
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Exercise No. 4(2)
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Exercise No. 4(3)
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Exercise No. 5 (1)
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Exercise No. 5 (2)
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Exercise No. 5 (3)
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Organic v. Inorganic
Organic compounds are biological.
Contain carbon. (Methane, butane,
acetone, toluene, acetylene, ethyl alcohol)
Inorganic compounds are mineral.
(Ammonium, cadmium, chromium,
lead, mercury)
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Contaminant Properties
Solubility
Miscibility
Specific gravity
Volatility
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LNAPL
Light non-aqueous phase liquids
Lighter than water
Gasoline
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DNAPL
Dense non-aqueous phase liquids
Denser than water
Trichloroethylene
(TCE)
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The Break (1)
River
Crude Oil
pipeline 3’
below grade
Creek
Pipelin
e
Break
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Marsh /
Wetland
The Break (2)
Pipeline
break
A
Silt and
fine
sand
River
Sand
Clay
and Silt
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A’
Exercise No. 6(1)
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Exercise No. 6(2)
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Exercise No. 6(3)
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Exercise No. 6(4)
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Environmental Site Assessments
… an analysis of a specific parcel of real
property to identify environmental risk.
Phase I
Phase II
Phase III
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Testing Methods (1)
Non-intrusive
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Intrusive
Testing Methods (2)
Geophysical survey
Auger drill rig
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Testing Methods (3)
Hollow stem auger
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Excavator
Testing Methods (4)
Installing a
monitoring well
Drilling inside
a building
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Testing Methods (5)
Shallow test pit
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Soil sample from
sonic rig
Testing Methods (6)
Soil samples from
hollow stem auger
Sampling a
monitoring well
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Environmental Site Assessments
… an analysis of a specific parcel of real
property to identify environmental risk.
Phase I
Phase II
Phase III
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Elevated Rapid Transit Line
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Options
Contaminated site clean-up or
remediation options range from
do-nothing to partial or total
remediation either in-situ (on-site)
or ex-situ (off-site).
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In-situ
In-situ remediation means to treat
the contamination on-site or in-place.
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Ozone and oxygen sparging
Excavation and on-site storage
Excavation/treatment and replace
Bioremediation
Groundwater soil vapor recovery
Phytoremediation
Encapsulation
Thermal desorption
In-situ: Vapor Extraction
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In-situ: Encapsulation
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In-situ: Encapsulation
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In-situ: Bioremediation
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Ex-situ
Ex-situ remediation means to remove
the contamination from the site.
Excavation and off-site disposal
at a legally authorized disposal site.
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Ex-situ: Removal
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Ex-situ: Removal
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Exercise No. 10
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Objectives
Now, you are able to...
• Recognise situations that have the potential
for site contamination
• Identify common types of contamination
• Discuss potential implications of
contamination on the right of way
and on the project
• Present options to manage or remediate
environmental contamination
73
Thank you!
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603-PT – Revision 4 – 04.30.08.. CAN