Definitions. The following words and terms used in
this regulation shall have the following meanings unless the context
clearly indicates otherwise:
AIRPORT ENVIRONS
The geographic area that is affected by airport air traffic
operations and defined on the basis of those areas immediately impacted
by the 65 db and greater noise exposure areas as delineated by the
current and approved DAFB Air Compatibility Use Zone Study. This area
is represented as the Airport Environs Zoning Overlay (AE).
AIRPORT HAZARD
Any structure or object of natural growth or use of land
within an airport hazard area which obstructs the air space required
for the flight of aircraft in landing or taking off at any airport
or is otherwise hazardous to such landing or taking off.
AIRPORT HAZARD AREA
Any area of land adjacent to an airport which has been declared
to be an "airport hazard area" by the federal, state and/or local
aviation authorities, in connection with any airport approach plan
recommended by such authorities.
BUILDING OFFICIAL
The Building Code Administrator of the Department of Inspections
and Enforcement or his/her agent.
BUILDING REGULATIONS/CODES
Residential and other building definitions are found in the
BOCA (Building Officials and Code Administrators) National Building
Code of 1996, the Kent County Supplement to the BOCA National Building
Code of 1996 and the Kent County Building Code Supplement to the 1995
CABO One- and Two-Family Dwelling Code, May 26, 1998, and subsequent building regulations and codes that may
be adopted by Kent County Levy Court.
DAY-NIGHT AVERAGE SOUND LEVEL (DNL)
A cumulative aircraft noise index which estimates the exposure
to aircraft noise and relates the estimated exposure to an expected
community response; a twenty-four-hour energy average sound level
expressed in decibels (db) with a ten-decibel penalty applied to noise
occurring between 10:00 p.m. and 7:00 a.m.
DNL Contour
A line linking together a series of points of equal cumulative
noise exposure based on Ldn metric. Such contours are developed based
on aircraft flight patterns, number of daily aircraft operations by
type of aircraft and time of day, noise characteristics of each aircraft
and typical runway usage patterns.
RESIDENTIAL USE GROUP BUILDING
All buildings and structures classified in the BOCA and regulations
listed in the definition of "building regulations/codes" below, classified
as Use Group R.
SOUND TRANSMISSION CLASS (STC) RATING
A single number rating characterizing the sound reduction
performance of a material tested in accordance with ASTM E 90-90,
"Laboratory Measurement of Airborne Sound Transmission Loss of Building
Partitions."
STRUCTURE
Any object, whether permanent or temporary, including, but
not limited to, a building, tower, crane, smokestack, earth formation,
transmission line, flagpole, ship mast or mobile objects.