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 9VAC25-110-80 - General permit

Current through Register Vol. 40, No. 24, July 15, 2024
Any owner whose registration statement is accepted by the
				  board, or whose permit coverage is automatically renewed, shall comply with the
				  requirements contained herein and be subject to all requirements of
				  9VAC25-31-170.
General Permit No.: VAG40
Effective Date: August 2, 2021
Expiration Date: July 31, 2026
GENERAL PERMIT FOR DOMESTIC SEWAGE DISCHARGES OF LESS THAN OR
				  EQUAL TO 1,000 GALLONS PER DAY
AUTHORIZATION TO DISCHARGE UNDER THE VIRGINIA POLLUTANT
				  DISCHARGE ELIMINATION SYSTEM AND THE VIRGINIA STATE WATER CONTROL LAW
In compliance with the provisions of the Clean Water Act
				  (33 USC §
										1251 et seq.), as amended, and pursuant to
				  the State Water Control Law and regulations adopted pursuant thereto, owners of
				  treatment works with domestic sewage discharges of a design flow of less than
				  or equal to 1,000 gallons per day on a monthly average are authorized to
				  discharge to surface waters within the boundaries of the Commonwealth of
				  Virginia, except those waters specifically named in board regulations that
				  prohibit such discharges.
The authorized discharge shall be in accordance with the
				  information submitted with the registration statement or combined application,
				  this cover page, Part I-Effluent Limitations, Monitoring Requirements and
				  Special Conditions, and Part II-Conditions Applicable to All VPDES Permits, as
				  set forth herein.
Part I
Effluent Limitations, Monitoring Requirements and Special
				  Conditions
A. Effluent limitations and
				monitoring requirements - receiving waters where the 7Q10 flows are less than
				0.2 MGD.
1. During the period beginning with
				the permit's effective date and lasting until the permit's expiration date, the
				permittee is authorized to discharge from outfall number 001 to receiving
				waters where the 7Q10 flows are less than 0.2 MGD.
The discharge shall be limited and monitored by the permittee
				  as specified in the following table:
EFFLUENT
								CHARACTERISTICS
DISCHARGE LIMITATIONS
MONITORING REQUIREMENTS
Instantaneous Minimum
Instantaneous
								Maximum
Frequency
Sample Type
Flow
								(MGD)(1)
NA
NL
1/year
Estimate
BOD5
NA
30 mg/l
1/year
Grab
Total Suspended Solids
NA
30 mg/l
1/year
Grab
Total Residual
								Chlorine(2)
After contact tank
1.0 mg/l
NA
1/year
Grab
Final effluent
NA
0.016
								mg/l(6)
1/year
Grab
E.
								coli(3)
NA
126 CFU/100 ml
1/year
Grab
enterococci(4)
NA
35 CFU/100 ml
1/year
Grab
Fecal Coliform
								Bacteria(5)
NA
200 CFU/100 ml
1/year
Grab
pH (standard units)
6.0
9.0
1/year
Grab
Dissolved Oxygen
5.0
								mg/l(6)
NA
1/year
Grab
NL = No Limitation, monitoring required
NA = Not Applicable
(1)The design flow of
								this treatment works is less than or equal to 1,000 gallons per
								day.
(2)Applies only when
								chlorine is used for disinfection and the discharge is into freshwater (see
								9VAC25-260-140 C for the classes of
								waters and boundary designations).
(3)Applies only when
								methods other than chlorine are used for disinfection and the discharge is into
								freshwater (see
								9VAC25-260-140 C for the classes of
								waters and boundary designations). When the treatment works is discharging,
								continuous disinfection shall be provided in order to maintain this effluent
								limit.
(4)Applies only when the
								discharge is into saltwater or the transition zone (see
								9VAC25-260-140 C for the classes of
								waters and boundary designations). When the treatment works is discharging,
								continuous disinfection shall be provided in order to maintain this effluent
								limit.
(5)Applies only when the
								discharge is into shellfish waters (see
								9VAC25-260-160 for the description
								of what are shellfish waters). When the treatment works is discharging,
								continuous disinfection shall be provided in order to maintain this effluent
								limit.
(6)Does not apply when
								the receiving stream is an ephemeral stream. "Ephemeral streams" are drainage
								ways, ditches, hollows, or swales that contain only (i) flowing water during or
								immediately following periods of rainfall or (ii) water supplied by the
								discharger. These waterways would normally have no active aquatic
								community.
2.
				All monitoring data required by Part I A 1 shall be maintained on site in
				accordance with Part II B. Monitoring results for treatment works serving
				buildings or dwellings other than individual single family dwellings shall be
				submitted to the department on a Discharge Monitoring Report (DMR) no later
				than the 10th of September following the monitoring period. The monitoring
				period is September 1 through August 31. A copy of the maintenance log required
				by Part I D 2 b (2) (e) shall also be submitted with the DMR. Monitoring
				results for treatment works serving individual single family dwellings are
				submitted to the Virginia Department of Health in accordance with
				12VAC5-640.
3. The 30-day average
				percent removal for BOD5 and total suspended solids
				shall not be less than 85%.