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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. SIC codes were replaced by NAICS codes in 1997.

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.

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 pollutant emissions are released.  Source air emissions are generally classified into four categories: point stationary sources, area or nonpoint stationary sources, onroad mobile sources and nonroad 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 or Phase I Vapor Recovery System – means a system that controls vapors during the transfer of gasoline from a delivery vessel to a gasoline dispensing facility vessel.

Stage II or Phase II Vapor Recovery System – means a system that controls vapors during the transfer of gasoline from a gasoline dispensing facility vessel to a motor vehicle.

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.