99.10.01

Noise

• Acoustical analysis required within 60 dB CNEL contour60 dB

  For any residential development within a sixty (60) decibel CNEL contour, an analysis by a professional architect, engineer or building designer shall demonstrate that the required noise levels will be achieved.

• Acoustical analysis required within 65 dB CNEL contour65 dB

  For any residential development within a sixty-five (65) decibel CNEL contour, an analysis by a professional mechanical or acoustical engineer shall demonstrate that the required noise levels will be achieved.

• Maximum indoor community noise equivalent level45 dB

  Within each main building, a community noise equivalent level (CNEL) not exceeding forty-five (45) decibels.

• Maximum outdoor community noise equivalent level65 dB

  In outdoor areas, a community noise equivalent level (CNEL) not exceeding sixty-five (65) decibels...

• Minimum private open spaceOpen spaceLand a development must leave unbuilt, sometimes required to be usable or planted. per unit when outdoor CNEL cannot be met100 sqftsq ftSquare feet. An acre is 43,560 sq ft; a typical suburban lot is 7,000–10,000.

  the development shall be designed to provide the lowest noise level reasonably possible within private open areas and/or common usable open areas of at least one hundred (100) square feet per unit