2What does a societies garbage say about it? How would the trash in a landfill from 50 years ago be different than the trash in a landfill today?How does the trash in a developing country look different then in a developed country?Why might landfills some day be considered a “mine” for resources?
3Types of Solid Wastematerials/organics/food/fd-basic.htmMSW – Municipal Solid Waste - Information from epa.govDate from EPA 2005
8Sanitary Landfilles/APEnvironmentalScience/course %20files/multimedia/lesson82/ani mations/5b_Modern_Landfill.htmlWhy doesn’t most waste in a sanitary landfill decompose?How do physical and hydrological conditions at a site affect its suitability for a landfill? Doesn’t get a lot of water, so that not a lot of leachate is produced.High levels of clay and silt in the soilAbove the water tableWhat is generally used as a barrier in landfills and why do landfills need multiple barriers?Use plastic liners and clay.Lower chance of pollutants escaping from the landfill.Monitoring the SiteSoil tests/water tests of the groundwater and local streams/rivers
9Incineration Can provide energy Less goes to land fills If not done properly, lots of air pollutionIronically a lot of communities don’t use these because in order for them to be profitable, the community has to ensure a certain amount of garbage and as waste is reduced incinerators become less profitable.
15U.S. Ocean Dumping ActPrevents dumping of industrial waste, sewage, radioactive waste, and medical wasteGarbage Patch in the Pacific OceanTwice the size of texas, biggest landfill in the world, impact on animalsSome comes from ships dumping stuff, or containers falling off big cargo boats, but a fair amount just comes from urban run-off that makes it way through steams, to rivers, to the ocean
16RCRAResource Conservation and Recovery ActEPA controls all waste (hazardous & non-hazardous) “cradle to grave”Includes landfills, waste transport, waste storage
17CERCLAComprehensive Environmental Response Compensation and Liability ActCommonly known as SuperfundOverseen by the EPAGoal: Mandates the development of priority lists and the clean up of hazardous waste sites.Blue are proposed sites, red are current sites, and green are deleted sites
18CERLA Passed in 1980 1960’s &1970’s – Rises of industry Left lots of hazardous waste & chemicals aroundCuyahoga RiverFlows through the city of Cleveland, which released many pollutantsRiver has “burned” many times, mostly from oil/gasoline on top of the water
20Love Canal – THE major event From 1942 to 1953 a landfill known as the love canal, was contaminated by Hooker chemical and then sold to the city after being covered up by layers of dirt. The city then allowed homes and schools to be built over the landfill and people started to feel the effects of the hazardous waste through sickness, cancer, birth defects... The people living on top of the landfill eventually had to leave their homes.2c/Hooker_Electrochemical_Quit_Claim_Deed_to_Bo ard_of_Education.pdf
22BrownfieldsOnce a site has been designated as clean it becomes a “Brownfield”nfo.htmDuwamish River? acificnw/ _pacificpduwamish17 .html
23Recycling in Maple Valley - http://your. kingcounty Recycling in Maple Valley - recycling/recycling.aspCedar Grove Composting -What can be composted in Maple Valley?recycling/food-collection.asp#cities