A nonconforming use may be changed to another nonconforming
use by the grant of a special exception, only upon determination by
the Zoning Hearing Board, after a public hearing, that the proposed
new use will be similar to or less detrimental to its neighborhood
and abutting properties than is the use it is to replace. In evaluating
relative detriment, the Zoning Hearing Board shall take into consideration,
among other things, potential traffic generation, nuisance characteristics,
such as emission of noise, dust, odor, glare, and smoke, fire hazards,
and hours and manner of operation.