"Percolation (perc) rate" means the number of minutes needed for water to drop one inch into the soil within a percolation test hole, used to estimate suitability of the soil for receiving and dispersing effluent.
N.H. Admin. Code § Env-Wq 1002.47
(See Revision Note at chapter heading for Env-Wq 1000) #9086, eff 2-9-08