N.H. Code Admin. R. Env-Sw 103.47
“Lower explosive limit” means the lowest concentration by percentage in air of a flammable gas or vapor in which an explosion can occur upon ignition at 25ºC (78ºF) at atmospheric pressure.
Source. (See Revision Note #1 at chapter heading for Env-Sw 100) #8460-B, eff 10-28-05; ss by #14103, effective 10-23-24 (formerly Env-Sw 103.41) (see Revision Note #2 at chapter heading for Env-Sw 100)