Landfill Gas and Soil Vapour
Landfill gas (LFG) is produced from the anaerobic digestion of organic waste within a landfill.
The gas may contain toxic chemicals and gases including methane, carbon dioxide and a mixture of trace volatile organic compounds (VOCs) potentially posing a health hazard or a nuisance in instances where compounds produced emit a strong, unpleasant smell.
The gas can also migrate through the soil and escape beyond the boundaries of the landfill site. As such, appropriate measures must be taken in order to control the accumulation and migration of landfill gas. A list of substances having the greatest significance with regards human health risk or nuisance odours have been derived and form the priority trace component list as outlined in LFTGN04.
The target compounds are selectively adsorbed and concentrated in sample tubes on-site and subsequently desorbed in the laboratory. Alternative methods such as grab sampling at ambient pressure into a tedlar bag are used to take a gas sample from the site for analysis later in the laboratory.
Scientific Analysis Laboratories routinely carries out the analysis of landfill gas and soil vapour and provides an extensive range of chemical analysis including:
- Bulk gases
- Hydrogen Sulphide
- Organosulphur compounds
- Trace VOCs
- Aldehydes and Ketones
- Volatile Fatty acids
- Dioxins and Furans
- C5-C16 Aliphatic / Aromatic Hydrocarbons
- Priority trace components according to LFTGN04