1. GHS Science CAPT Embedded Task Brownfield Sites

2. Does this place look familiar?

3.  CosCob Power Plant = Brownfield Site

4. What is a Brownfield Site?  Piece of land that was once used for industrial purposes and is now typically abandoned because of suspected contamination.

5. 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. MercuryBenzene Arsenic

6. Contaminants of Major Concern  Asbestos – Cause respiratory problems  Pesticides – Cause cancer & birth defects  Benzene – Causes cancer  Lead and Copper - Neurotoxic  Mercury – May cause physical and mental disorders.  PCBs – Possible cause of cancer & birth defects

7. Think…  Think of another site/place in Greenwich that might become a Brownfield site in the future.  How would a site become contaminated?

8. Where do contaminants come from? ContaminantsPossible 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 ProductsLeaking undergound storage tanks Solvents: tetrachloroethlyene, trichloroethylene, III-trichloroethane dry cleaners, machine shops, metal finishing/plating shops

9. Remediation: Making Brownfield sites safe and usable again…  Identify and measure contaminants  Determine the safety risks  Stop the contaminants from spreading  Remove or isolate the contaminants

10. 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

11. Your Task 11 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.