Any land use, physical facility or activity prohibited within Article III lawfully in existence within Wellhead Protection Zones 1, 2, or 3 prior to the effective date of this chapter may continue to exist on the parcel upon which it is located subject to meeting existing applicable federal, state, and local regulations including the requirements included within Article VI.
Notwithstanding the provisions of Article III, large volume subsurface sewage disposal systems or large volume spray irrigation sewage disposal systems may be used if necessary to solve sewage disposal problems associated with existing development.
Notwithstanding the provisions of Article III, public water supply projects which require the use of chemicals for disinfection or treatment will be allowed in all wellhead protection areas subject to their approval, construction, and operation in accordance with DEP regulations.