SCC – means Standard Classification Code as established by the USEPA.

Secondary standard – a pollution limit based on environmental effects such as damage to property, plants, visibility, etc. Secondary standards are set for criteria air pollutants.

SIC – means the Standard Industrial Classification code devised by the United States Office of Management and Budget to classify establishments according to the type of economic activity in which they are engaged.

SIP – means State Implementation Plan. A detailed description of the programs a state will use to carry out its responsibilities under the Clean Air Act. State implementation plans are collections of the regulations used by a state to reduce air pollution in nonattainment areas. The Clean Air Act requires that the USEPA approve each state implementation plan. Members of the public are given opportunities to participate in review and approval of state implementation plans.

SJTPO – means South Jersey Transportation Planning Organization. The SJTPO is the Metropolitan Planning Organization (MPO) serving Atlantic, Cape May, Cumberland, and Salem counties in South Jersey.

Smog – a mixture of pollutants, principally ground-level ozone, produced by chemical reactions in the air involving smog0forming chemicals. A major portion of smog-formers comes from burning of petroleum-based fuels such as gasoline. Other smog0formers, volatile organic compounds, are found in products such as paints and solvents. Smog can harm health, damage the environment and cause poor visibility. Major smog occurrences are often linked to heavy motor vehicle traffic, sunshine, high temperatures and calm winds or temperature inversion. Smog is often worse away from the source of the smog-forming chemicals, since the chemical reactions that result in smog occur in the sky while the reacting chemicals are being blown away from their sources by winds.

SO2 – means Sulfur Dioxide. A criteria air pollutant. Sulfur dioxide is a gas produced by burning coal, most notably in power plants. Some industrial processes, such as production of paper and smelting of metals, produce sulfur dioxide. Sulfur dioxide is closely related to sulfuric acid, a strong acid. Sulfur dioxide plays an important role in the production of acid rain.

SOx – means Oxides of Sulfur.

Source – any place or object from which pollutants are release. A source can be a power plant, factor, dry cleaning business, gas station or farm. Cars, trucks and other motor vehicles are sources and consumer products and machines used in industry can be sources, too. Sources that stay in one place are referred to as stationary sources; sources that move around, such as cars or planes are called mobile sources.

Source gas – means air or gases passed through, or generated by, a source operation and discharged from the source operation.

Source operation – means any process or any identifiable part thereof that emits or can reasonably be anticipated to emit any air contaminant either directly or indirectly into the outdoor atmosphere.  A source operation may include one or more pieces of equipment or control apparatus.

Stage I Controls – Systems placed on fuel storage tanks to control and capture gasoline vapors during loading of the tanks by delivery trucks.

Stage II Controls – Systems placed on service station gasoline pumps to control and capture gasoline vapors during refueling, including vapor recovery nozzles.

STAPPA – means State and Territorial Air Pollution Program Administrators. A national association of air pollution control agencies throughout the United States

State implementation plan (SIP) – A detailed description of the programs a state will use to carry out its responsibilities under the Clean Air Act. State implementation plans are collections of the regulations used by a state to reduce air pollution in nonattainment areas. The Clean Air Act requires that the USEPA approve each state implementation plan. Members of the public are given opportunities to participate in review and approval of state implementation plans.

Stationary source – a place or object from which pollutants are released and which does not move around.  Stationary sources include power plants, gas stations, incinerators, houses etc.

Stratosphere – part of the atmosphere, the gases that encircle the Earth. The stratosphere is a layer of the atmosphere 9-31 miles above the Earth. Ozone in the stratosphere filters out harmful sunrays, including a type of sunlight called ultraviolet B, which has been linked to health and environmental damage.

SULEV – means Super Ultra Low-Emission Vehicle.

Sulfur dioxide – a criteria air pollutant. Sulfur dioxide is a gas produced by burning coal, most notably in power plants. Some industrial processes, such as production of paper and smelting of metals, produce sulfur dioxide. Sulfur dioxide is closely related to sulfuric acid, a strong acid. Sulfur dioxide plays an important role in the production of acid rain.