CONNECTICUT BROWNFIELDS - Greenwich Public Schools
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Transcript CONNECTICUT BROWNFIELDS - Greenwich Public Schools
GHS Science
CAPT Embedded Task Review
Brownfield Sites
Your Task
1. Formulate a question/problem statement
about a Brownfield site that can be answered
through a scientific experiment/investigation.
2. Design a scientific experiment/investigation
that answers your question/problem statement.
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What is a Brownfield Site?
Piece of land that was once used for industrial
purposes and is now typically abandoned
because of suspected contamination.
• Name one Brownfield site in Greenwich?
• What has this property been used for that led to it being
identified as a Brownfield (contaminated) site?
What is a contaminant?
A contaminant is a toxic chemical that can harm
humans and/or the environment.
Contaminants can pollute water, air, and/or soil.
Arsenic
Mercury
Benzene
Contaminants of Major Concern
Asbestos – Cause respiratory problems
Benzene – Causes cancer
Lead and Copper - Neurotoxic
Mercury – May cause physical and mental
disorders. Greatly affects fish
populations.
Where do contaminants come from?
Contaminants
Possible source of contamination
metal finishing/plating shops,
manufacturing and foundries, coal burning
arsenic, cadmium chromium, lead, mercury
power plants
Heavy metals:
Gasoline/constituents of gasoline:
gasoline, benzene, ethylbenzene, toluene,
xylene
gasoline stations, tank farms, pipelines
Petroleum Products
Leaking undergound storage tanks
Solvents:
dry cleaners, machine shops,
tetrachloroethlyene, trichloroethylene,
metal finishing/plating shops
III-trichloroethane
Why Redevelop Brownfield Sites?
Discounted real estate cost
Valuable location
Reduce pressure on undeveloped land
Preserve historical or architecturally significant
buildings
Eliminate health and safety hazards
Improve community
Detecting Soil and Groundwater Contamination
Usually a portable drilling
rig is brought to the site
A well is installed. Soil is
sampled as the well is
drilled.
Groundwater is sampled and
analyzed for the suspected
pollutants.
How to make a Brownfield site
usable again…
Get rid of contaminants (ex. Excavation
techniques)
Stop the contaminants from spreading
Your Task
1. Formulate a question/problem statement
about a Brownfield site that can be answered
through a scientific experiment/investigation.
2. Design a scientific experiment/investigation
that answers your question/problem statement.
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