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D. 24

Learn about the detrimental effects of mercury, phosphates, and nitrates on water bodies and organisms. Explore the concept of Brownfields and how communities can address contaminated sites for redevelopment. Understand eutrophication and the dangers of bioaccumulation and biomagnification in ecosystems.

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D. 24

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  1. D. 24 Mr. Fleming

  2. D.24 D.24 Explain how the accumulation of mercury, phosphates and nitrates affects the quality of water and the organisms that live in rivers, lakes and oceans.

  3. What is a Brownfield? “…..real property, the expansion, redevelopment, or reuse of which may be complicated by the presence or potential presence of a hazardous substance, pollutant or contamination.” (US EPA) • Land that contains low to moderate levels of contamination • Contamination can include: • Old gas stations (lead based gas) • Old factories that used toxic metals like LEAD or MERCURY • Cleaning solvents • Can be redeveloped with environmental cleanup

  4. ASBESTOS

  5. LEAD PAINT….

  6. UNDERGROUND STORAGE TANK

  7. POTENTIAL FOR CONTAMINATION

  8. STAINED SOILS

  9. POTENTIAL FOR CONTAMINATION?

  10. POTENTIAL FOR CONTAMINATION

  11. The inventory can be detailed…

  12. THE COMMUNITY DEFINES ITS BROWNFIELDS EPA provides the guidance, but it is the community that identifies a property as a Brownfield Abandoned property Active but Underutilized Real estate turnover complicated by real or perceived contamination Property use Blighted –significantly conflicts with a master plan

  13. Utilize Resources on-line • Where you live...Search your Environment by Zip code • http://www.epa.gov/epahome/commsearch.htm • Other Program information and Support • http://www.epa.gov/brownfields • http://www.epa.gov/compliance/environmentaljustice/index.html • http://www.epa.gov/smartgrowth • http:///www.smarte.org

  14. More On-line resources: State Websites Virtual File Cabinet http://www.in.gov/idem/4101.htm • Select Virtual File Cabinet • Search by County, City, Town, Zip code For Brownfield Program Resources and Support http://www.brownfields.in.gov

  15. Brownfield Recall Question What are the three categories of major contaminants in a brownfield?

  16. D.24 D.24 Explain how the accumulation of mercury, phosphates and nitrates affects the quality of water and the organisms that live in rivers, lakes and oceans.

  17. Eutrophication Recall 1. Describe how eutrophication occurs? Phosphate and nitrogen runoff cause algal blooms. This algae dies and microrganisms decompose it absorbing oxygen and creating sediment.

  18. Eutrophication Recall 2. How does eutrophication impact the environment? It lowers the amount of available oxygen.

  19. Bioaccumulation vs Biomagnification Bioaccumulation refers to the accumulation of substances, such as pesticides, mercury and other toxins in an organismover time. Biomagnification refers to the accumulation of toxins through the trophic levels of a food chain. It results in an increased concentration of the toxin in the higher organisms of the food chain. 

  20. Bioaccumulation

  21. Bioaccumulation Recall What happens to the concentration of toxins as you move up the food chain? They tend to increase as you go from the prey to predator up the food chain.

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