Environmental guidance for your business in Northern Ireland & Scotland
Landfill engineering includes the design and construction of a landfill facility, as well as methods for checking the integrity of landfill facilities - for example, construction quality assurance.
Landfill leachate is a potentially polluting liquid, which may cause harmful effects to the soil, groundwater and surface water that surround a landfill site unless it is contained, managed and treated.
Your environmental permit will contain conditions that require you to put mechanisms in place to manage emissions from your site.
The reasons for monitoring leachate, groundwater and surface water at landfills are to:
Landfill gas is a complex mixture that mainly contains methane and CO2. These gases are produced during the major part of the decomposition process. Many other gases are produced in trace amounts and the exact composition of the gas will vary between different landfill sites, parts of the same site, and over time. You must monitor and control landfill gas.
Correctly monitoring landfill gas is important for the advance warning of any underground migration of gas out of a landfill, which might indicate that the control measures have failed. Landfill gas must also be collected and burned to produce energy or flared - this reduces the impact of methane on climate change.
If your landfill site will accept non-hazardous or hazardous waste, you will need to assess hydrogeological, stability and landfill gas risks when you apply for your PPC permit. If your site will accept inert waste, you will need to assess stability risks. See the page in this guideline: Pollution prevention and control permits for landfill sites.
Designing and monitoring landfills
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