|Home||Public Notices||Staff Directory||Contact DAQ||Search|
|Air Toxics Program >> Risk Assessment & Management Activities >> SAB|
|Practices and Policies of the Department of Environment and Natural Resources: Policies Concerning the Secretary's Science Advisory Board on Toxic Air Pollutants (NCSAB)|
Deliberations involving a particular chemical usually require several months. This gives the NCSAB ample time to adequately consider the relevant literature and provides multiple opportunities for arranged presentations. Following deliberation, the NCSAB develops a recommendation including a "range of risks" for the compound being reviewed. NCSAB recommendations are part of a narrative (see model outline below) prepared by the NCSAB Liaison and approved by NCSAB members. The narrative is not an in-depth examination of the toxicology of the compound. Rather, it is a document that is intended to discuss the NCSAB recommendation, with adequate explanation of all safety factors used, points of uncertainty or disagreement, a discussion on alternate recommendations and the resulting risks to the public health, and a mathematical representation of the final risk assessment methodology. The NCSAB and DENR then publish the recommendation to its website and notify stakeholders to review and submit written comments on the recommendation for a 30-day period following publication. Recommendations received within the comment period are reviewed by the NCSAB and the recommendation is then revised and finalized, then forwarded to DENR.
The NCSAB issues ambient air concentration recommendations for toxic air pollutants but does not issue recommended averaging times. The Toxics Protection Branch of the Division of Air Quality is responsible for recommending appropriate averaging times based on the guidelines found in the 1986 North Carolina Academy of Sciences report entitled "Report and Recommendations of the Air Toxics Panel of the North Carolina Academy of Sciences"*.
All NCSAB meetings are recorded in their entirety and minutes of each meeting are compiled. Meeting minutes that have been approved by the NCSAB are posted on the NCSAB website at http://www.ncair.org/toxics/risk/sab//sab_minutes.shtml. By clicking on the calendar year menu, the meeting minutes for that year can be selected and viewed.
NCSAB summary narratives will be provided to the Air Quality Committee and the Environmental Management Commission when the Division of Air Quality forwards a proposal for rule making based on an NCSAB recommendation.
NCSAB considers only toxicology and epidemiology in its risk assessment considerations. The Planning Section and Technical Services Section of the Division of Air Quality provide input to the Air Quality Committee (AQC) and the Environmental Management Commission (EMC) on economic and other technical issues. These economic and technical feasibility assessments must be provided in a timely manner to the AQC and the EMC to permit informed risk management decisions on their part.
|Attachment 1: NCSAB Model Narrative Outline|
Summary: Overview of NCSAB consideration
Data Assessment: Toxicological, epidemiological review processes
Conclusion: Narrative of NCSAB risk assessment deliberation process
Averaging Time: DENR recommended averaging time based on NCAS guidelines
Bibliography: Listing of relevant scientific literature and presentations considered by NCSAB