DQRA

Detailed Quantitative Risk Assessments (DQRA) are sometimes required where large amounts of contamination (e.g. hydrocarbons) have been encountered on site, to determine whether the contamination presents an actual risk to an identified receptor (e.g. end users of a site or a nearby stream). Where remedial works are to take place, DQRA can also be used to derive clean-up concentrations for levels of contamination which can remain in the ground following any remedial works which have been undertaken.