Loading and unloading. Loading, unloading, opening, closing or other handling of boxes, crates, containers, building materials, liquids, garbage cans, refuse or similar objects or the pneumatic or pumped loading or unloading bulk materials in liquid, gaseous, powder or pellet form or the compacting of refuse by persons engaged in the business of scavenging or garbage collection, whether private or municipal, between the hours of 9:00 p.m. and 7:00 a.m. the following day when the latter is a weekday and between the hours of 9:00 p.m. and 9:00 a.m. the following day when the latter is a legal holiday or a weekend day, except by permit, when the sound therefrom creates a noise disturbance across a residential real property line.