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12.0 Glossary

Storm Water Drainage System: Streets, gutters, inlets, conduits, natural or artificial drains,
channels and watercourses, or other facilities that are owned, operated, maintained, and
used for the purpose of collecting, storing, transporting, or disposing of storm water.

Storm Water Quality Management Program (SQMP): A document which summarizes the
measures to be taken to comply with the NPDES Permit and reduce the discharges of
pollutants in storm water to the maximum extent practicable.

Streetscapes: Landscaped areas adjacent to public or private streets to buffer adjacent
developments which may serve as a means for reducing noise impact.

Structure: Anything, including a building, located on the ground in a permanent location or
attached to something having a permanent location on the ground.

Stream: A body of water that flows at least periodically or intermittently through a bed or
channel that has banks and supports fish or other aquatic life.

Street Cross-Section: A term used to describe the total number of lanes on a street. For
instance, a street that has two lanes of northbound traffic, two lanes of southbound traffic,
and a refuge lane is commonly referred to as a five-lane cross-section.

Strike-Slip: a fault in which the primary displacement is horizontal and parallel to the
direction of the fault plane.

Structure: Anything constructed or erected which requires a fixed location on the ground,
or is attached to something having a fixed location on the ground (Section 22.08.190 S. of the
Los Angeles County Code).

Subdivision: The division of a lot, tract, or parcel of land into two or more lots, tracts,
parcels, or other division of land for lease, sale, or financing, in accordance with the
Subdivision Map Act (California Government Code, Section 66410 et seq.). The lots can either
improved or unimproved, and be separately conveyed by sale or lease, and which can be
altered or developed.

Subdivision Development Plan: Specific development plans for an unapproved tentative
map, including, but not limited to: plot plans, building elevations, grading plans, and
landscape plans applicable to individual lots within a tentative map.

Subdivision Map Act: Division 2 (Sections 66410 et seq.) of the California Government Code,
this act vests in local legislative bodies the regulation and control of the design and
improvement of subdivisions, including the requirement for tentative and final maps.

Subregional: Pertaining to a portion of a region.

Subsidence: Sinking of the land surface due to a number of factors, of which groundwater
extraction is one; the gradual settling or sinking of an area with little or no horizontal motion.

R:\Projects\PAS\CEN\000306\Draft EIR\12.0_Glossary-051017.docx 12-77 Centennial Project
Draft EIR