"Good Neighbors Keep Their Noise to Themselves"
St. Mary's County, MD Noise Ordinance
(NPC posted this April 2004)
St. Mary's County Comprehensive Zoning Ordinance
Article 6. DEVELOPMENT STANDARDS AND APPROVALS
CHAPTER 61 GENERAL DEVELOPMENT STANDARDS
|61.1 Specific Purposes and Applicability.|
|61.2 Exceptions to Height Limits.|
|61.3 Lighting Standards.|
|61.4 Noise Standards.|
|61.5 Refuse Storage Areas.|
|61.6 Screening of Mechanical Equipment.|
|61.7 Yards Requirement.|
|61.8 Site Access Criteria.|
61.1. Specific Purposes and Applicability.
This chapter contains supplemental land use and use-specific site development requirements that are applicable to development in all zoning districts and for all use categories except for single-family detached dwellings, unless otherwise stated. References to buffer yards are to the types and specifications established in Schedule 63.4.3,, Landscaping and Buffer Yards.
61.2. Exceptions to Height Limits.
Except for height limitations imposed in the AICUZ/AE overlay districts in Article 4, height limitations of this Ordinance shall not apply to:
|Public monuments||Chimneys||Standpipes||Cooling towers|
|Commercial television antenna||Belfries||Conveyors||Smoke stacks|
|Stage towers or scenery lots||Church spires||Water towers||Elevator bulkheads|
|Ornamental towers and spires||Silos||Water tanks||Flag poles|
|Commercial public radio antenna||Fire towers||Public communication towers, Public communication Antenna|
61.3. Lighting Standards.
|1.||General Requirements. Exterior lighting will be evaluated in the site plan review process to ensure that functional and security needs of the project are met in a way that does not adversely affect adjacent properties or neighborhoods. The degree to which exterior night lighting affects the project, and adjacent properties or the neighborhood will be evaluated considering the light source, level of illumination, hours of illumination, and need for illumination.|
|2.||Design Standards. The proposed lighting must also comply with the following design standards:|
61.4. Noise Standards.
|1.||Except for emergency service land uses, and in the event of loss of utility service, no use shall create ambient noise levels that exceed the following standards:|
|SCHEDULE 61.4.1: MAXIMUM NOISE STANDARDS BY ZONING DISTRICT|
|2.||Duration and Timing. The noise standards above shall be modified as follows to account for the effects of time and duration on the impact of noise levels:|
|3.||Acoustic Study. The Planning Director may require an acoustic study. The Planning Director may require an acoustic study for any proposed project that could have or create a noise exposure exceeding the standards above. For any study required, noise shall be measured with a sound level meter that meets the standards of the American National Standards Institute (ANSI Section S1.4-1979, Type 1 or Type 2). Noise levels shall be measured in decibels from the property line. The unit of measurement shal l be designated as dB. A calibration check shall be made of the instrument at the time any noise measurement is made.|
|4.||Noise Attenuation Measures. The Planning Director may require the incorporation into a project of any noise attenuation measures deemed necessary to ensure that noise standards are not exceeded.|