Virginia Administrative Code › Title 9 - ENVIRONMENT › Agency 25 - STATE WATER CONTROL BOARD › Chapter 110 - VIRGINIA POLLUTANT DISCHARGE ELIMINATION SYSTEM (VPDES) GENERAL PERMIT REGULATION FOR DOMESTIC SEWAGE DISCHARGES OF LESS THAN OR EQUAL TO 1,000 GALLONS PER DAY › Section 9VAC25-110-10 - Definitions

Current through Register Vol. 40, No. 24, July 15, 2024
The words and terms used in this chapter shall have the same
				  meanings as given in the State Water Control Law, Chapter 3.1 (§ 62.1-44.2
				  et seq.) of Title 62.1 of the Code of Virginia and the VPDES Permit Regulation
				  (9VAC25-31), unless the context clearly indicates otherwise, except that for
				  the purposes of this chapter:
"7Q10" means the lowest flow averaged over a period of seven
				  consecutive days that can be statistically expected to occur once every 10
				  years.
"Board" means the State Water Control Board. When used
				  outside the context of the promulgation of regulations, including regulations
				  to establish general permits, "board" means the Department of Environmental
				  Quality.
"Combined application" means the Virginia Department of
				  Health Discharging System Application for Single Family Dwellings Discharging
				  Sewage Less Than or Equal to 1,000 Gallons per Day and State Water Control
				  Board Virginia Pollutant Discharge Elimination System General Permit
				  Registration Statement for Domestic Sewage Discharges Less Than or Equal to
				  1,000 Gallons per Day. This application combines the VDH Alternative
				  Discharging Sewage Treatment Regulations for Individual Single Family Dwellings
				  (12VAC5-640) requirements with the board's registration statement
				  requirements.
"Department" or "DEQ" means the Virginia Department of
				  Environmental Quality.
"Domestic sewage" means the water-carried human wastes from
				  residences, buildings, industrial establishments, or other places.
"Individual single family dwelling" means a structure,
				  including any accessory structure such as a garage or pool house, housing one
				  family or household or one that is designed for one family only. When a
				  treatment works serving an individual single family dwelling has additional
				  unused connections, it remains a treatment works serving an individual single
				  family dwelling until such time that an additional single family dwelling is
				  connected to the treatment works.
"Receiving water" means a creek, stream, river, lake,
				  estuary, groundwater formation, or other body of water into which treated waste
				  or untreated waste is discharged.
"Total maximum daily load" or "TMDL" means a calculation of
				  the maximum amount of a pollutant that a waterbody can receive and still meet
				  water quality standards, and an allocation of that amount to the pollutant's
				  sources. A TMDL includes wasteload allocations (WLAs) for point source
				  discharges, and load allocations (LAs) for nonpoint sources or natural
				  background or both, and must include a margin of safety (MOS) and account for
				  seasonal variations.
"VDH" means the Virginia Department of
				  Health.
Statutory Authority: § 62.1-44.15 of the Code of
					 Virginia; § 402 of the Clean Water Act; 40 CFR Parts 122, 123, and
					 124.