Stormwater Quality Design Manual (May 2007) - City of Sacramento ...

GlossaryStructural Control Measure means any structural facility designed andconstructed to mitigate the adverse impacts of stormwater and urban runoffpollution (e.g. canopy, structural enclosure). The category may include both sourceand treatment control measures.Target Pollutants — Pollutants identified by the permittees as most likely toimpair local receiving waters, based on evaluation of available monitoring data andother information.Treatment means the application of engineered systems that use physical,chemical, or biological processes to remove pollutants. Such processes include, butare not limited to, filtration, gravity settling, media absorption, biodegradation,biological uptake, chemical oxidation, and UV radiation.Treatment Control Measure means any engineered system designed to removepollutants by simple gravity settling of particulate pollutants, filtration, biologicaluptake, media absorption or any other physical, biological, or chemical process.Urban Runoff means any runoff from urbanized areas including stormwater anddry weather flows from a drainage area that reaches a receiving water body orsubsurface. During dry weather, urban runoff may be comprised of groundwater baseflow and/or nuisance flows, such as excess irrigation water.Volume-Based Treatment Control Measures — Stormwater quality treatmentmeasures that rely on volume capacity to treat stormwater. These measures detain orretain runoff and treat it primarily through settling or infiltration. Examples:detention and infiltration basins, porous pavement and stormwater planters(bioretention).Water Board(s) — Generic reference to the State Water Resources Control Board(SWRCB) and/or the nine Regional Water Quality Control Boards (RWQCBs).Water Quality Volume (WQV) — For stormwater treatment BMPs that dependon detention to work, the volume of water that must be detained to achievemaximum extent practicable pollutant removal. This volume of water must bedetained for a specified drawdown time.Wet Season (Rainy Season) — for the Sacramento region, the calendar periodbeginning October 1 and ending April 30. Note: This differs from the Dept. of Fishand Game’s wet weather definition, which is October 15 – April 15.Sacramento and South Placer Regions Stormwater Quality Design ManualMay 2007Glossary–7