Unified Land Development Code - Town of Gilbert

Ordinance No. 1513
Page 3 of8
establishing noise attenuation requirements applicable to noise sensitive uses in new
projects in Overflight Area 2, and by requiring notification to future owners and
occupants of possible noise impacts on noise sensitive uses in new projects in
Overflight Areas 2 and 3 of the Williams Gateway Airport Overlay District.
B. Definitions
For the purposes of this section, the following words and terms shall have the
following meanings:
1. "Airport" means the Williams Gateway Airport owned and operated by the
Williams Gateway Airport Authority.
2. "DNL" means the 24-hour average sound level, in A-weighted decibels,
obtained after the addition of ten decibels to sound levels for the periods
between 10 p.m. and 7 a.m. as averaged over a span of one year. It is the FAA
standard metric for determining the cumulative exposure of individuals to noise.
3. "New project" means a project with the following status of development as of
October 16,2003 (the effective date of this ordinance): 1) no preliminary plat
has been approved; or 2) a preliminary plat has expired; or 3) no preliminary
design review site plan has been approved; or 4) a preliminary design review
site plan has expired.
4. "Noise sensitive uses" means single family or multifamily residential uses,
hospitals, nursing homes, places of worship, libraries, public and private schools, and
daycare centers.
5. "Overflight Areas" means those areas designated on the Williams Gateway
Airport Overlay District Map as overflight areas. Overflight areas are divided into
Overflight Areas 1, 2 and 3.
6. "Project" means either, as applicable, a subdivision with boundaries that
have been or will be established by a final subdivision plat or a site with
boundaries depicted on' a site plan.
7. "Williams Gateway Airport Overlay District" means the area designated within
the boundary of the Williams Gateway Airport Overlay District
Map as the Williams Gateway Airport Overlay District. '