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The California Air Pollution Control District Act of 1947 allowed 1 or more counties to form air pollution districts. [5] [6] The California Bay Area Pollution Control Act of 1955 created the Bay Area Air Pollution Control District. [5] [7] The California Mulford-Carrell Air Resources Act of 1967 resulted in the creation of 11 air basins. [5] [8]
Atmospheric pollutant concentrations expressed as mass per unit volume of atmospheric air (e.g., mg/m 3, μg/m 3, etc.) at sea level will decrease with increasing altitude because the atmospheric pressure decreases with increasing altitude. The change of atmospheric pressure with altitude can be obtained from this equation: [2]
The models also serve to assist in the design of effective control strategies to reduce emissions of harmful air pollutants. During the late 1960s, the Air Pollution Control Office of the U.S. EPA initiated research projects that would lead to the development of models for the use by urban and transportation planners. [1]
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The Bay Area Air Quality Management District awards Carl Moyer Program funds on a first-come, first-served basis to applicants with completed applications. Projects over $100,000 go to the Air District’s Mobile Source Committee for approval, while projects under $100,000 are approved by an Air Pollution Control Officer. [8]
These include warehouses which induce truck trips, and thus qualify as indirect sources of air pollution. In 2021, the SCAQMD board voted to authorize the Indirect Source Rule, which requires warehouses larger than 100,000 square feet to take steps to cut pollution, fund similar air pollution mitigation projects, or face penalties.
The South Coast Air Basin—SCAB (or SoCAB) is one of several regional air basin areas designated by the state of California, for the purpose of air quality management and air pollution control in Southern California. The SCAB district was created in 1969.
SAFE AIR (Simulation of Air pollution From Emissions Above Inhomogeneous Regions) is an advanced atmospheric pollution dispersion model for calculating concentrations of atmospheric pollutants emitted both continuously or intermittently from point, line, volume and area sources. It adopts an integrated Gaussian puff modeling system.