In the development of strategies, it is necessary to consider three very interrelated areas and develop appropriate guidelines for:
(a) Minimal degradation of air quality.
(b) Implementation of land use and zoning. (c) Population density control.
102.4 Minimal Degradation Guidelines
It shall be the policy of the NWCAA not to allow the atmosphere to degrade below the levels set out by appropriate air quality objectives. These are the points where the health, comfort, and convenience of the individual is assured and the effects of air pollution are known not to occur. To achieve this objective, it shall be necessary, when growth or change occurs, to:
102.41 Require the best practical technology for those who locate here or are required to upgrade their facilities.
102.42 Allow expansion of an area only if the probable emissions of the newcomers, when added to those from presently existing facilities, are not likely to cause violations of existing ambient air standards.
102.5 Land Use Planning and Zoning
Zoning is the most effective way to regulate land use. The practice in land use planning to allocate certain districts for particular uses can create a problem.
By locating too many units which emit similar types of pollutants in one area, a problem may be created which would ordinarily not exist or be of minimal consequence if the units were more scattered.
Air pollution control authorities have a responsibility to minimize the impact of air contaminants and to keep the air basins within the NWCAA’s jurisdiction below the air quality objectives even under the most adverse meteorological conditions. The NWCAA thus has a planning responsibility in terms of warning and insuring that incompatible land uses do not occur. It is the policy of the NWCAA to work with other agencies to assure that:
102.51 Incompatible land uses are discouraged.
102.52 Zones are intermixed in such a way that air pollution problems may be minimized.
102.53 Zones are not made so large that air pollution problems are created by locating too may units with similar emissions. In industrial zones, the industries should be dissimilar in nature to minimize the concentration of a single contaminant.