Insofar as practicable, sound will be measured while the source under investigation is operating at normal, routine conditions and, as necessary, at other conditions including, but not limited to, design, maximum and fluctuating rates. For test purposes, these conditions will apply during the times from 7:00 A.M. to 10:00 P.M. and from 10:00 P.M. to 7:00 A.M.
N.J. Admin. Code § 7:29-2.4