Toxic Air Contaminant: As defined in California Health and Safety Code section 39655, a toxic air contaminant is an air pollutant that may cause or contribute to an increase in mortality or in serious illness, or which may pose a present or potential hazard to human health. Toxic air contaminants also include any substance that is listed as a hazardous air pollutant pursuant to subsection (b) of Section 112 of the federal act (42 U.S.C. Sec. 7412 (b)).
Transit-Oriented Development (TOD): Moderate- to higher-density development, located within an easy walk of a major transit stop, generally though not always with a mix of residential, employment, and shopping opportunities designed for pedestrians without excluding automobiles.
Transit: The conveyance of persons or goods from one place to another by means of a local public transportation system (e.g., SamTrans buses and Caltrain).
Transmission Line: An interconnected group of electric lines located on poles or underground which transfer energy, in bulk, between points of supply and points of delivery.
Transportation Demand Management (TDM): A strategy for reducing demand on the road system by reducing the number of vehicles using the roadways and/or increasing the number of persons per vehicle. TDM attempts to reduce the number of persons who drive alone on the roadway during the commute period and to increase the number in carpools, vanpools, buses and trains, walking, and biking.
Trip: A one-way journey that proceeds from an origin to a destination via a single mode of transportation; the smallest unit of movement considered in transportation studies. Each trip has one "production end" (or origin) and one "attraction end" (destination). (City of Redwood City, Redwood City General Plan)
Upland: Any area that does not qualify as a wetland because the associated hydrologic regime is not sufficiently wet to elicit development of vegetation, soils, and/or hydrologic characteristics associated with wetlands. Such areas occurring within floodplains are more appropriately termed nonwetlands.
Urban: development of residential uses at a density greater than 2 dwelling units per acre, commercial, business park, commercial entertainment and other similar uses, along with associated open space and other amenities. As used in the Draft EIR, “urban” encompasses densities that may commonly be considered to be “suburban.”
Urban Runoff: Stormwater from streets and adjacent properties that carries pollutants of various kinds into receiving waters. This runoff can include such pollutants as sediments, pathogens, fertilizers/nutrients, hydrocarbons, and metals.
Vegetative Communities: Unique groupings of plants determined primarily on elevation and climate.