relate to the type of contaminants and receptors you are dealing with.Risk assessment evaluation criteria are the parameters used to judge whether particular harm or pollution needs further assessment or is unacceptable.
Refine and update it as you progress through land contamination risk management ( LCRM). You will develop an initial conceptual site model in the preliminary risk assessment. migration of ground gases and vapours such as permanent gases, landfill gas and volatile hydrocarbons into buildingsĮvaluate the risk using risk assessment evaluation criteria together with a detailed knowledge of the conceptual site model.a secondary pathway from groundwater contamination to surface water.infiltration and contaminant migration through permeable strata such as the unsaturated zone for groundwater.ingestion, inhalation, dermal contact for human health receptors.Pathways will be specific to the receptor type. From the options appraisal stage onwards we refer to them as ‘relevant contaminant linkages’. we refer to S-P-R linkages as contaminant linkagesĭuring the risk assessment stage we use ‘potential contaminant linkages’ until they are confirmed.the terms source, pollutant and contaminant have the same meaning.receptor – something that could be adversely affected by a contaminant, for example a person, controlled waters, an organism, an ecosystem, or Part 2A receptors such as buildings, crops or animals.pathway – a route by which a receptor is or could be affected by a contaminant.source – a contaminant or pollutant that is in, on or under the land and that has the potential to cause harm or pollution.risk management – the formal process to identify, assess and determine the risks, and to select and take action to mitigate them.risk assessment – the formal process of identifying, assessing and evaluating the health and environmental risks that may be associated with a hazard.risk – a combination of the probability, or frequency of occurrence of a defined hazard and the magnitude of the consequences of the occurrence.hazard – a property or situation that in particular circumstances could lead to harm or pollution.Evaluate the risk – decide whether a risk is unacceptable.Estimate the risk – predict what degree of harm or pollution might result and how likely it is to occur by using the tiered approach to risk assessment.Assess the hazard – use a source-pathway-receptor ( S-P-R) linkage approach to find out if there is the potential for unacceptable risk.Identify the hazard – establish contaminant sources.You must follow these steps for each tier of risk assessment.