Soil or groundwater that is contaminated with chemicals which are volatile, for example, petroleum hydrocarbons, can be a source of vapours which can move into buildings, confined spaces or excavations on a site. The potential risk to human health from vapour intrusion should be evaluated as part of assessments of sites with a vapour risk. This evaluation is particularly relevant to buildings with a slab-on-ground construction or basements where air flow is reduced and exposure may be a higher risk.
This practice note only addresses chronic health risks. If you suspect an acute or explosive risk, take appropriate precautions and contact emergency services immediately.
- planning the vapour assessment
- sampling methods
- interpreting and modelling scenarios
- assessing health risks