The residence time is determined by the streamflow and the volume of the river reach or the average stream velocity and the length of the river reach. An on-site system designed to treat and dispose of domestic sewage. A typical septic system consists of a tank that receives waste from a residence or business and a drain field or subsurface absorption system consisting of a series of percolation lines for the disposal of the liquid effluent. A channel or conduit that carries wastewater and storm water runoff from the source to a treatment plant or receiving stream. Sanitary sewers carry household, industrial, and commercial waste.
Storm sewers carry runoff from rain or snow.
Combined sewers handle both. Any person with a vested interest in the TMDL development. See the definition for Water quality standard. Discharge that occurs in a natural channel. Bottom sediment material in a natural water system.