Correct Answer - Option 2 : 1 and 2 only
Sanitary landfills:
- Sanitary landfills are a method of waste disposal where the waste is buried either underground or in large piles. This method of waste disposal is controlled and monitored very closely.
- For sanitary landfills, the process starts by digging a large hole in the ground that is then lined with thick plastic (normally 2-4 feet thick) and a layer of impervious clay.
- The bottom of the landfill is also lined with a network of plumbing that functions as a collection system for any liquids.
- Leachates is the term used to describe liquids that leach or leak from the landfill, and this system collects the leachates.
- These components of the sanitary landfill help prevent materials and liquids from spreading to the surrounding ground and waterways.
Issues with Sanitary landfills:
Emanating gases: The largest issue associated with sanitary landfills is the risk of pollution. As waste breaks down, methane gas is created, and if it escapes from the landfill, it could pollute the air. In addition, methane gas can be dangerous if it builds up in the landfill because it is flammable and could be explosive.
Leachates: Along with air pollution, sanitary landfills also pose a threat to water systems. If the lining of the landfill is punctured or the collection system breaks, leachates could travel from the landfill to the surrounding ground and contaminate the groundwater.
