however, it does not advocate a substantial expansion in the length of the Reassessment. Rather, the committee encourages EPA to address the major concerns raised in this review and to finalize the current Reassessment as quickly, efficiently, and concisely as possible. The committee agreed that it is important for EPA to recognize that new advances in the understanding of the toxicity of TCDD, other dioxins, and DLCs could require reevaluation of key assumptions in the risk assessment document. The committee recommends that EPA routinely monitor new scientific information with the understanding that future revisions may be required to maintain a risk assessment that is based on current state-of-the-science. However, the committee also recognizes that stability in regulatory policy is important to the regulated community and thus expects that science-based changes in regulatory policy on TCDD, other dioxins, and DLCs will be invoked only in the face of compelling new information that would warrant revision of its final risk assessment. Such substantial gains in knowledge are not likely to occur frequently.

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