Portland Land Use Code

Citation: Portland Land Use Code
Parent Document: Portland Land Use Code
Jurisdiction: Portland (municipal)
Original Source: https://www.portlandmaine.gov/asset/a5dcd1dc-4117-40b3-b3da-74a56919e14b ↗

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equipment will not create a hazard to air residential zone, except for sound from
traffic. construction activities, sound from traffic
2. Rooftop appurtenances may exceed the on public streets, sound from temporary
maximum height limit of 45 feet providing activities such as festivals, sound created
that their design and placement is either as a result of, or relating to, an emergency,
fully screened or integrated into the including sound from emergency warning
architecture of the structure on which signal devices, and maritime navigation
they sit. signals.
3. The applicant shall provide a 2. In measuring sound levels under this
determination from the Federal Aviation subsection, sounds with a continuous
Administration that structures and duration of less than 60 seconds shall be
equipment in excess of 45 feet will not measured by the maximum reading on a
exceed the applicable height guidelines for sound level meter set to the A weighted
the runway approach and will not create a scale and the fast meter response (L
conclusive evidence that the proposed maxfast). Sounds with a continuous
development will not create a hazard. duration of 60 seconds or more shall be
measured on the basis of the energy
10.2.8 Performance standards average sound level over a period of 60
Development in the Eastern Waterfront Port Zone seconds (LEQ1).
shall comply with the following standards: 3. In addition to the sound level standards
A. Outdoor storage of materials. Outdoor otherwise established, facilities or
storage of commodities and materials operations established or built in the
accessory to normal conduct of business shall EWPZ on or after July 1, 1988, shall employ
be entirely contained, including runoff best practicable sound abatement
contaminants and residual material, within a techniques to prevent tonal sounds and
designated area. impulse sounds or, if such tonal and
B. Noise impulse sounds cannot be prevented, to
1. The level of sound, measured by a sound minimize the impact of such sounds in
level meter with frequency weighting residential zones. Tonal sound is defined as
network (manufactured according to a sound wave usually perceived as a hum
standards prescribed by the American or which because its instantaneous sound
National Standards Institute, Inc.), pressure varies essentially as a simple
inherently and recurrently generated sinusoidal function of time. Impulse sounds
within the EWPZ between the hours of are defined as sound events characterized
7:00 p.m. and 7:00 a.m. from facilities or by brief excursions of sound pressure,
operations commenced on or after July 1, each with a duration of less than one
1988, shall not exceed 55 decibels on the A second.
scale at or within the boundaries of any 10-8 | CITY OF PORTLAND LAND USE CODE WATERFRONT ZONES

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