A. This section applies to all residential short plats, subdivisions, and multifamily projects (five or more units) proposed after December 24, 1998.

B. For all residential short plats, subdivisions, and multifamily projects proposed within 100 feet of an arterial or state highway that has an existing or projected traffic volume of 20,000 or more average daily trips, the applicant shall include sound attenuation measures in the site design and/or the design and construction plans of the structure(s).

C. The applicant shall demonstrate that proposed measures provide sound attenuation and that the methods go beyond standard building construction practices. Measures that reduce noise at the site, such as building location, design, berms, noise attenuating fences, and barriers, to help mitigate outside noise exposure shall be used whenever practical in preference to measures which only protect interior spaces. Noise walls over eight feet in height shall be avoided unless all other mitigation measures are determined infeasible and impractical. Blank walls shall be prohibited. The Technical Committee shall approve appropriate methods for reducing noise levels. (Ord. 2590 § 2 (part), 2011).