GHS Science CAPT Embedded Task Review
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Transcript of GHS Science CAPT Embedded Task Review
GHS ScienceCAPT Embedded Task Review
Brownfield Sites
Your Task
2
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.
Piece of land that was once used for industrial
purposes and is now typically abandoned
because of suspected contamination.
What is a Brownfield Site?
• 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.
Mercury BenzeneArsenic
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
Heavy metals:
arsenic, cadmium chromium, lead, mercury
metal finishing/plating shops,
manufacturing and foundries, coal burning
power plants
Gasoline/constituents of gasoline:
gasoline, benzene, ethylbenzene, toluene,
xylene
gasoline stations, tank farms, pipelines
Petroleum Products Leaking undergound storage tanks
Solvents:
tetrachloroethlyene, trichloroethylene,
III-trichloroethane
dry cleaners, machine shops,
metal finishing/plating shops
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
10
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.