...measure is used when ground water is the main exposure pathway. • RfD (Reference Dose): "The RfD is an estimate (with uncertainty spanning perhaps an order of magnitude) of a daily exposure to the human population (including sensitive subgroups) that is likely to be without...

...measure is used when ground water is the main exposure pathway. • RID (Reference Dose): "The RfD is an estimate (with uncertainty spanning perhaps an order of magnitude) of a daily exposure to the human population (including sensitive subgroups) that is likely to be without...

...equation: RfD = NOAEL / (UF x MF) which is the functional equivalent of Equation 1. In general, the RfD is an estimate (with uncertainty spanning perhaps an order of magnitude) of a daily exposure to the human population (including sensitive subgroups) that is likely to be without...

...toxicants.6 RfDs are derived for the noncarcinogenic effects of chemicals that are also carcinogenic. The RfD is an estimate (with uncertainty spanning perhaps an order of magnitude) of a daily exposure to the human population (including sensitive subgroups) that is likely to be without...

...reference dose (RfD) for the purpose of quantitative risk assessment of noncarcinogenic chemicals. The RfD is an estimate (with uncertainty spanning perhaps an order of magnitude) of the daily exposure to the human population (including sensitive subgroups) that is likely to be without...

...other scientific information in setting standards for noncancer human health effects. An RfD or RfC is an estimate (with uncertainty spanning perhaps an order of magnitude) of daily exposure (RfD) or continuous inhalation exposure (RfC) to the human population (including sensitive subgroups)...

...(which should be similar to MCLGs) uses less strong language and is as follows: The reference dose is an estimate (with uncertainty spanning perhaps...exposure to the human population (including sensitive groups) that is likely to be without appreciable risk of deleterious effects during a lifetime. We...

...body weight per day — for example, 0.004 mg/kg/day. Simply described, an RfD is a rough estimate of daily exposure to the human population (including sensitive subgroups) that is likely to be without appreciable risk of deleterious effects during a lifetime. The uncertainty in...

...procedure for a margin of exposure analysis for a response related to carcinogenicity is -An RfD or RfC is an estimate with uncertainty spanning perhaps an...availability of chronic as opposed to subchronic data. operationally analogous, the difference being that a threshold of cancer response is not necessarily...

...epidemiological data, animal studies, and other available toxicological information. In general, the RfD is an estimate (with uncertainty spanning perhaps an order of magnitude) of a daily exposure to the human population (including sensitive subgroups) that is likely to be without...