Presentations are invited for the ASTM International Workshop on Assessment of Air Quality Related to Hydraulic Fracturing Activities, which will take place Jan. 27, 2016. Workshop will focus on air quality issues potentially affecting the general public, as well as potential impact to workers at those sites, including respirable silica, benzene and other organics, and nitrogen oxides. Each presentation will be limited to 20 minutes, with 10 minutes for discussion.