Document ID: chunk:federal_register_of_legislation:F2013C00288:reg:5:p2
Version: federal_register_of_legislation:F2013C00288
Segment Type: reg
Provision Reference: reg 5 (pt 2/2)
Character Range: 2040639–2042831

sources.
Point source means a source of contamination which comes from a contaminating activity at a particular site.
Receptor is the entity (organism, population, community, or set of ecological processes) that may be adversely affected by contact with, or exposure to, a contaminant of concern.
Response level means the concentration of a contaminant at a specific site, based on a site assessment, for which some form of response is required to provide an adequate margin of safety to protect public health and/or the environment.
Risk assessment is a process intended to calculate or estimate the risk to a given target organism, system, or sub-population, including the identification of attendant uncertainties, following exposure to a particular contaminant, taking into account the inherent characteristics of the agent of concern as well as the characteristics of the specific target system.
Risk is the probability of an adverse effect in an organism, system or sub-population caused under specific circumstances by exposure to a contaminant.
Risk management is a decision-making process involving consideration of political, social, economic, and technical factors with relevant risk assessment information relating to a hazard to determine an appropriate course of action.
Tier 1 assessment is a risk-based analysis comparing site data with generic published screening criteria (Tier 1 criteria) for various environmental values.
Tier 2 assessment is a site-specific assessment in which risks to potentially exposed populations are assessed using site-specific data on pathways, and the characteristics of the exposed populations. In Tier 2, site data is compared with generic criteria modified for site-specific conditions.
Tier 3 assessment is a further step from a Tier 2 evaluation and examines the specific risk-driving factors in more detail. This often involves additional data collection and may incorporate more sophisticated modelling techniques. In Tier 3, site data is compared with site-specific target levels.
Well is a hole drilled into an aquifer for the purpose of monitoring or extracting groundwater. This generic term includes bores, water wells and tubewells.