Registration is now open for Nano Risk Analysis (II), a workshop to explore how a multiple models approach can advance risk analysis of nanoscale materials. The workshop, which is being organized by the Emerging Nanoscale Materials Specialty Group (ENMSG) of the Society for Risk Analysis (SRA) and co-sponsored by Bergeson & Campbell, P.C., will be held September 15-16, 2014, in Washington, D.C. The workshop will bring together experts from diverse disciplines to explore ways that Alternative Testing Strategies (ATS) may be combined to create a Weight of Evidence (WOE) or “multiple models” approach to inform context -- specific decisions about risk from exposure to novel nanoscale materials.  The goal is to advance a common understanding of the state of the science, early lessons, current opportunities, and next steps for developing ATS for use in decision making for nanoscale materials. The output of the workshop will be a set of recommendations reported to the Organization for Economic Cooperation and Development (OECD) Working Party on Manufactured Nanomaterials (WPMN) and via peer reviewed publications and web-based portals about ways in which these approaches may be practically applied in the near term to improve environmental decision making by governmental and industrial organizations. Abstracts for posters to be presented at the workshop are due August 1, 2014.