"Calculated maximum safe fill height" means the fill height corresponding to the rated capacity of a tank minus the volume that can be filled at the maximum possible system fill rate multiplied by the time it takes to completely stop product flow into the tank or 2 minutes, whichever is greater.
N.H. Admin. Code § Env-Or 302.04
(See Revision Note at chapter heading for Env-Or 300) #10487, eff 2-7-14