Contra Costa County |
Ordinance Code |
Title 8. ZONING |
Division 88. SPECIAL LAND USES |
Chapter 88-3. WIND ENERGY CONVERSION SYSTEMS |
§ 88-3.612. Noise.
(a)
Except as provided in subsection (b) of this section, a commercial WECS may not generate or emit any noise at any time that exceeds a maximum level of sixty-five decibels (dBA), as measured at each line of the exterior project boundary.
(b)
A land use permit issued for a commercial WECS may authorize a maximum noise level that exceeds the level specified in subsection (a) if the commercial WECS is adjacent to an already-existing or approved commercial WECS and upon a finding that existing legal offsite residences and general plan-designated residential areas will not be adversely affected.
(c)
A residential WECS may not generate or emit any noise at any time that exceeds a maximum level of sixty decibels (dBA), as measured at each line of the parcel upon which the residential WECS is installed.
(d)
The measurement of commercial or residential WECS noise levels may not be adjusted for, or averaged with, periods of non-operation of the WECS. A site-specific noise study may be required to confirm compliance with the applicable noise standard. If noise generated or emitted by a commercial or residential WECS exceeds the applicable standard, the WECS operator must take measures necessary to comply with the standard, which may include discontinued operation of one or more WECS.
(Ord. No. 2011-04, § VI, 4-5-11; Ord. 85-39 § 4).