"Feasible" means "feasible" as defined in RSA 485:1-a, V, namely "capable of being done with the use of the best technology, treatment techniques, and other means which the department finds, after examination for efficacy under field conditions as well as laboratory conditions, is available at reasonable cost."
N.H. Admin. Code § Env-Ws 302.28
#8498, eff 11-30-05