Document ID: chunk:federal_register_of_legislation:F2013C00288:reg:8:p5
Version: federal_register_of_legislation:F2013C00288
Segment Type: reg
Provision Reference: reg 8 (pt 5/7)
Character Range: 3048938–3052004

group of people, plants, animals and/or the ecology of a specified area that is exposed to a particular dose or concentration of a chemical substance, that is, it depends on both the level of toxicity of the chemical substance and the level of exposure to it. Risk differs from hazard primarily because risk considers probability.
Risk assessment is the process of estimating the potential impact of a chemical, physical, microbiological or psychosocial hazard on a specified human population or ecological system under a specific set of conditions and for a certain timeframe.
Risk characterisation is the qualitative, and wherever possible, quantitative determination, including attendant uncertainties, of the probability of occurrence of known and potential adverse effects of a contaminant on a given organism, system or population, under defined exposure conditions.
Risk communication is an interactive exchange of information about health and environmental risks amongst risk assessors, managers, news media, interested groups, and the general public.
Risk estimation is the quantification of the probability, including attendant uncertainties, that specific adverse effects will occur in an organism, system, or population due to actual or predicted exposure.
Risk evaluation is the establishment of a qualitative or quantitative relationship between risks and benefits of exposure to a chemical, involving the complex process of determining significance of the identified hazards and estimated risks to the system concerned or affected by exposure. Risk evaluation is an element of risk management. Risk evaluation is synonymous with riskbenefit evaluation.
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.
Safety is the practical certainty that adverse effects will not result from exposure to a chemical substance under defined circumstances. It is the reciprocal of risk.
Screening criteria are concentration values used in screening. Usually published for the purpose by an authoritative body (for example, HILs) or derived according to a specified methodology. Screening criteria are available for soil, groundwater, surface water and sediment.
Screening is the process of comparison of site data to screening criteria to obtain a rapid assessment of contaminants of potential concern.
Sensitive groups refers to sub-populations with both susceptibility and vulnerability factors.
Sensitivity analysis is the process of changing one variable (input) while leaving the others constant and determining the effect on the output. The procedure involves fixing each uncertain quantity, one at a time, at its credible lower bound and then its upper bound (holding all other at their medians), and then computing the outcomes for each combination of values (US EPA 1992). It can be used to test the effects of both uncertainty and variability in input values.
Site means the