This policy and the guiding principles attached are designed to support the use of various techniques for characterizing variability and uncertainty. Further, the policy defines a set of Conditions for Acceptance. These conditions are important for ensuring good scientific practice in quantifying uncertainty and variability. In accordance with EPA's 1995 Policy for Risk Characterization, this policy also emphasizes the importance of clarity, transparency, reasonableness and consistency in risk assessments.

• Policy for Use of Probabilistic Analysis in Risk Assessment at EPA (PDF)(4 pp, 26 K, May 15, 1997)