Responses to frequent questions were compiled from inquiries made either by telephone to the Technical Review Workgroup for Metals and Asbestos (TRW) hotline (toll-free 1-866-282-8622) or via e-mail to pbhelp@epa.gov (please refer to the Technical Assistance page for further information).

• Frequent Questions from the General Public
• Frequent Questions from Risk Assessors on the Integrated Exposure Uptake Biokinetic (IEUBK) model
• Frequent Questions from Risk Assessors on the Adult Lead Methodology
• Bioavailability Guidance at the Assessing Relative Bioavailability in Soil at Superfund Sites page