§ 42-79. Measurement standards classification by use occupancy.

(a)

For purposes of defining the "use occupancy" all premises containing habitually occupied sleeping quarters shall be considered in residential use. All premises containing transient commercial sleeping quarters shall be considered tourist use. All premises containing business where sales, professional or other commercial use is legally permitted shall be considered commercial use. All premises where manufacturing is legally permitted shall be considered manufacturing use. In cases of multiple use, the more restrictive use category shall prevail. Hospital, nursing home, school, library, and church uses shall be considered noise sensitive zones.

(b)

The following standards shall be used in the measurement of noise:

(1)

The measurement of sound or noise shall be made with a decibel or a sound level meter operating on the A-weighting scale of any standard design and quality meeting the standards prescribed by the American National Standards Institute for a Type 2 or better sound level meter. The instruments shall be maintained in calibration and good working order. Field calibration conducted pursuant to policy and prior to a series of sound or noise measurements shall be definitive evidence that the instrument was calibrated and in good working order at the time the series of measurements were taken. Measurements recorded shall be taken so as to provide a proper representation of the noise source. The microphone used during measurement shall be positioned so as not to create any unnatural enhancement or diminution of the measured noise. A windscreen for the microphone shall be used when required. Traffic, aircraft and other background noises shall not be considered in taking measurements except where such background noise interferes with the primary noise being measured.

(2)

The measurement shall be made at or beyond the property line on which such noise is generated, or perceived, at approximately five feet above ground.

(3)

In the case of an elevated or directional sound or noise source, compliance with the noise limits is to be maintained at any elevation at the boundary.

(c)

The following shall be used in the measurement of light:

(1)

The measurement of light shall be made with a standard light meter or photometer.

(2)

To measure vertical illuminance, the measurement shall be made at the property line with the light meter sensor directed toward the light source, held five feet above the ground, and a reading noted in footcandles.

(3)

To measure horizontal illuminance, the measurement shall be made at the property line with the light meter laid on the ground, sensor up, and a reading noted in footcandles.

(Ord. No. 2008-21, § 1, 8-19-08; Ord. No. 2013-13, § 1, 8-27-2013)