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Fndangnred Sorties: A species of animal or plant is considered Improvement: Term used to indicate structures or utility additions its pro spears for survival and reproduction on a vacant parcel of land. to he oral ang eyed when are in immediate jeopardy from one or more causes. I d' t Sou ce Pollut ion! Generally ester or air pollution general ed Environment: The combination of all external influences and by an area rather than at a specific point. A dust storm is a form condition, affecting life, development and ultimate survival of of indirect source air pollution. an organism including man. Intermediate Regional Flood: A flood having an average frequency of Epicenter: Part of the earth's surface directly above the focus occurre cilinothe order in of f9onceiven year00 years with a 1% probability that it of an earthquake. Erosion: The wearing away of the land surface by running water. Itrapped ed bions An atmospheric condition where a layer of cool air is y a layer of warm air so that it cannot rise. Inversions nd an wid ice. spread polluted air horizontally rather than vertically so that Expansive Soils: Soil. which swell when they absorb water and contaminating substances cannot be widely dispersed. An inversion shrink as they dry. Primarily found in clays. of several days can cause an air pollution episode. Fault: Break in the earth's cruet along which parallel slippage Land Classification: The arrangement of land units into various of adjacent earth material has occurred at some point in the ped, categories based upon the properties of the land or its suitability for some particular purpose. Flood; A temporary covering of land with water. IAn: Night average sound level. The average equivalent A-weighted sound level during n 24-hour day, obtained after addition of 30 Flood Plain: The relatively flat area or lowlands adjoining a ocean, or. lake, which have been or decibels to sound levels occurring at night after 70 p.m. and before river, stream, watercourse, 7 a.m. may be covered by water, Geological: Pertaining to rock or solid matter. Leachate: result o chemical and biological particles carwaste mat by water as a result of rain wafer percolating through waste materials. Leaching: The removal of materials in solution from surface soil Ground Cover: Grasses, shrubs, other vegetation, of inorganic matter layers as the solution seeps to lower soil layers. used to keep soil from being blown or washed away. Levee_ Aman-made embankment to prevent flooding. Groundwater: Water which percolates from the surface or lateral movement and fully saturates pore spaces of rock. local Road: A roadway that provides local access to abutting pro- perties, mainly used by passenger vehicles. This type of road has Groundwater Table: Fluctuating level of groundwater within the earth; the lowest traffic volumes and speed limits. high during rainy season, low dazing dry season. major Co llecf or Street: A roadway that collects [raffle from two Gully: A channel resulting from erosion caused by concentrated but or more minor collector streets and carries to community centers or intermittent flow of water. The occurrence of gullies may sub- high volume traffic way. This roadway generally allows medium speeds stantially interfere with normal use of land as in the case of in urban areas and higher speeds in rural areas. tilling. Marsh: Periodically vet or continually flooded areas with the our- Habitat: The place or type of site where a plant or animal naturally 'face not deeply submerged. or normally lives and grows. Hardpan: A hardened soil layer torsed bycementation of soil Mee-.der: A turn or winding of a stream. particles with organic materials or otherer matter. Metamorphic Rock: Rock derived from pre-existing rock through Herbaceous: Vegetation having little or no woody fiber and last inq heat and pressure. usually for only one growing season. Micro Climate: Small scale differences in climate serest by localised Historic Landmark: An o existing structure or monument which serves wind patterns, solar exposure, and shelter. as a unique reminder of social, economic, or political hi.e tory of Micro Relief: Small scale, local difference in topography, including San Joaquin County, or its cities, California or the United States. mounds, swales or pita. Historic Site: A unique reminder of City, County, state, of Federal Minor Collector Street: A roadway that collects vehicles from local history indicating where an important building stood, where an streets end Carrie. these vehicles to locally important traffic important event took place, or where something such as an Indian. generators. Roadway generally allows low speed travel. village or pioneer community was located. M b'1 Source Pollution; A moving spurge of pollution o automobiles- family H droearbona: A family of compounds containing carbon and hydros er. referring to air pollution caused by but not limited to eutomoblles. n various combinations. They are emitted into the atmosphere from manufacturing, storage and handling, or combustion of petroleum products and through natural processes. Certain hydrocarbons Monitoring: Periodic or continuous determination of the quantity or interact with nitrogen oxides in the presence of intense sunlight quality of pollutants or radio-active contamination present in the to form photochemical air pollution, commonly called smog. environment. Igneous Rock: Rock formed from the cooling and solidification of National Ambi t Air pu lity Standards: (NAAQS) The prescribed level molten matter within the earth. of pollutants in the outside air that cannot be exceeded legally Impact; effect of any direct man-made actions or indirect repui- during a specified time in a specified geographical area. cussions of man-made actions on existing physical, social or economic conditions.