The Department of Environmental Services proposed to amend Env-A 101.210 in order to add a definition of “unobstructed” in air pollution dispersion modeling. A public hearing will be held on February 3, 2014, and the deadline for comment is February 10, 2014. See http://www.gencourt.state.nh.us/rules/register/2014/january-9-14.pdf (pp. 3-4).