This term is synonymous with "stormwater runoff". Unlike stormwater pollution, "point source pollution" can be easily attributed to a single source, such as a catastrophic leak from a storage tank. "Non-point source pollution" (stormwater runoff) has many contributors, e.g., oil leaks from vehicles in parking lots, sediment from multiple sources, a chemical or oil sheen from drums, tanks, equipment or raw materials stored outdoors. [compliance]