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Infiltration: The percolation of water into the ground. Inlet: A structural facility located just below the ground surface, used to collect stormwater runoff for conveyance purposes. Generally located in streets and parking lots, inlets have grated lids, allowing stormwater from the surface to pass through for collection. The term "inlet" can also be used in reference to the point at which stormwater from impervious surfaces or conveyance pipe enters a stormwater management facility. LD -50: The lethal dose of a substance that is expected to kill approximately 50 percent of experimental animals through oral ingestion. (Refer to product Material Safety Data Sheet.) Local Dispensing Location: An area within 15 feet of an above - ground storage tank (AST) and used to dispense fuel directly from the AST, typically through a flexible hose. Low Impact Development (LID): A stormwater management approach that seeks to mitigate the impacts of increased runoff and stormwater pollution using a set of planning, design, and construction approaches and stormwater management practices that promote the use of natural systems for infiltration, evapotranspiration, and reuse of rainwater, and can occur at a wide range of landscape scales (i.e., regional, community, and site scales). Mechanical Treatment Facilities: Manufactured and proprietary stormwater quality devices used to remove pollutants from stormwater. Notice of Operations and Maintenance. A recorded document that identifies the presence of a privately maintained stormwater management facility. Off -Site Stormwater Facility: Any stormwater management facility located outside the property boundaries of a specific development, but designed to reduce pollutants from and /or control stormwater flows from that development. On -Site Stormwater Facility. Any stormwater management facility necessary to control stormwater within an individual development site and located within the boundaries of the development site. Operations and Maintenance (O &M): The continuing activities required to keep stormwater management facilities and their components functioning in accordance with design objectives. Operations and Maintenance Plan: Activities developed to identify the on -going operation and maintenance measures required to keep stormwater management facilities and their components functioning in accordance with design objectives and permit requirements. Outfall: A location where collected and concentrated water is discharged. Outfalls include discharge from stormwater management facilities, drainage pipe systems, and constructed open channels. Stormwater Management Manual 1 -9 Eugene 2014