As used in this chapter, the following terms shall have the meanings indicated:
Those costs associated with the upgrade/replacement of a current sanitary system with a low-nitrogen sanitary system including equipment, labor, materials and excavation directly related to the removal of the current sanitary system and/or installation of the new low-nitrogen sanitary system, which have been reviewed by the Water Quality Improvement Advisory Board and are deemed to be appropriate and necessary for the replacement of the particular system on the specific property . In determining whether a cost is appropriate and/or necessary, the Water Quality Improvement Advisory Board will consider the usual and customary costs of certain equipment, materials, and labor, as well as any characteristics of the property that may aid or hinder the replacement.
All owners of residential property within the Town of Shelter Island served by a septic or cesspool waste system.
Any sanitary system that has been approved by Suffolk County Department of Health Services that has shown to reduce nitrogen levels to 19 milligrams or less per liter, until such time as Suffolk County Department of Health Services approves a sanitary system that reduces nitrogen levels to 10 milligrams or less per liter, at which time that will constitute a low-nitrogen sanitary system and the previous systems reducing to 19 milligrams or less will no longer constitute a low-nitrogen sanitary system.