Section Env-Or 406.06 - Leak Rate Detection Criteria(a) The tightness test for a UST system or system component shall be capable of detecting a system leak rate of 0.10 gallon per hour with a probability of detection of 0.95 and a probability of false alarm of 0.05, accounting for all variables including vapor pockets, thermal expansion of regulated substance, temperature stratification, evaporation, pressure, end deflection, water table, and tidal action.(b) When line tightness testing is used for suction or atmospheric piping, the pipe pressure tightness test shall have a detection limit equivalent to 0.1 gallon per hour at 1.5 times operating pressure.N.H. Admin. Code § Env-Or 406.06
(See Revision Note at chapter heading for Env-Or 400) #10393, eff 9-1-13
Amended by Volume XXXVIII Number 45, Filed November 8, 2018, Proposed by #12643, Effective 10/10/2018, Expires 10/10/2028.