The districts hereinafter designated as combining X districts are established to be combined with other districts in certain areas which are uniquely susceptible to air contamination because of terrain, contour, elevation, winds or other meteorological and physical conditions. The regulations are intended to prevent concentration of air contaminants which may cause injury, detriment, nuisance or annoyance to the health or welfare of persons or damage to property. The regulations of any district with which an X district is combined shall remain the same, except as to matters specified in Section 17.28.020, which shall apply in lieu of the corresponding regulations otherwise effective.

(Prior gen. code § 8-43.0)

No use shall be permitted in a combining X district which causes, or is found by the board of zoning adjustments to involve:

A.

The emission of odorous gases or odorous matter in quantities such as to be perceptible at any lot line of the lot or building site upon which the source is situated; or

B.

The emission of visible gray smoke of a shade or quality darker than No. 1 on the Ringelmann Chart as specified in Circular 7718 of the United States Bureau of Mines, or its equivalent opacity as determined by the Bay Area Pollution Control District, for more than three minutes in any one hour.

(Ord. 2002-60 § 1 (part); Prior gen. code § 8-43.1)

(Ord. No. 2010-71, § 42, 12-21-10)