encyclopedia

SOUNDWALL

Noise control walls and barriers built between highways and nearby homes that can reduce noise levels by 10-15 decibels.

SOURCES

Refers to the origin of air contaminants. Can be point (coming from defined site) or non-point (coming form many diffuse sources). Stationary sources include relatively large, fixed facilities such as power plants, chemical process industries, and petroleum refineries. Area sources…

SOUTH COAST AIR BASIN (SCAB)

A geographic area defined by the San Jacinto Mountains to the east, the San Bernardino Mountains to the north, and the Pacific Ocean to the west and south. The entire SCAB is under the jurisdiction of the South Coast Air…

SOUTH COAST AIR QUALITY MANAGEMENT DISTRICT (SCAQMD)

Air Quality Management District (AQMD).

SOUTHERN CALIFORNIA ASSOCIATION OF GOVERNMENTS

The regional planning agency for Los Angeles, Imperial, Orange, Riverside, San Bernardino, and Ventura Counties; designated the Metropolitan Planning Organization (MPO) by the Federal Government for management and coordination of specified federal and state funded programs. These include air quality…

SOUTHERN CALIFORNIA RAIL GROUP INTERIM JOINT POWERS

Convened as a Joint Powers Agency in 1996 pursuant to SB 457 to investigate whether Amtrak intercity rail passenger services could be more efficiently administrated under a locally controlled agency than by Caltrans’ Division of Rail.

Southern California Rapid Transit District (1964-1993)

The Southern California Rapid Transit District (also referred to as RTD or SCRTD), was the successor to the original Los Angeles Metropolitan Transit Authority after that agency virtually went bankrupt. It was created by an act of the California State Legislature in…

Southern California Rapid Transit District (SCRTD)

The Southern California Rapid Transit District (SCRTD sometimes called RTD) was established by the California Legislature in 1964 to plan, build and operate a regional rapid transit system along with the operation of a regional bus system. It was created…

SOUTHERN CALIFORNIA REGIONAL RAIL AUTHORITY

A joint powers agency including Los Angeles, Orange, Riverside, San Bernardino, and Ventura Counties formed to plan, construct, and operate the regional commuter rail system known as Metrolink.