Virginia Administrative Code › Title 9 - ENVIRONMENT › Agency 25 - STATE WATER CONTROL BOARD › Chapter 860 - VIRGINIA POLLUTANT DISCHARGE ELIMINATION SYSTEM GENERAL PERMIT REGULATION FOR POTABLE WATER TREATMENT PLANTS › Section 9VAC25-860-70 - General permit

Current through Register Vol. 40, No. 24, July 15, 2024
Any owner whose registration statement is accepted by the
				  department will receive coverage under the following permit and shall comply
				  with the requirements therein and be subject to all requirements of
				  9VAC25-31.
General Permit No.: VAG64
Effective Date: July 1, 2023
Expiration Date: June 30, 2028
GENERAL PERMIT FOR POTABLE WATER TREATMENT PLANTS
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, as
				  amended, and pursuant to the State Water Control Law and regulations adopted
				  pursuant thereto, owners of potable water treatment plants are authorized to
				  discharge to surface waters within the boundaries of the Commonwealth of
				  Virginia, except those specifically named in board regulations that prohibit
				  such discharges.
The authorized discharge shall be in accordance with the
				  information submitted with the registration statement, this cover page, Part I
				  - Effluent Limitations, Monitoring Requirements, Special Conditions and Part II
				  - Conditions Applicable to All VPDES Permits, as set forth in this general
				  permit.
Part I
A. EFFLUENT LIMITATIONS AND MONITORING
				REQUIREMENTS.
1. Facilities other than reverse
				osmosis or nanofiltration plants.
During the period beginning with the permittee's coverage
				  under this general permit and lasting until the permit's expiration date, the
				  permittee is authorized to discharge process wastewater from outfalls:
				  __________
Such discharges shall be limited and monitored as specified
				  below:
EFFLUENT CHARACTERISTICS
EFFLUENT LIMITATIONS
MONITORING REQUIREMENTS
Monthly Average
Minimum
Maximum
Frequency(1)
Sample Type
Flow (MGD)
NL
NA
NL
1/3 Months
Estimate(2)
pH (SU)(3)
NA
6.0
9.0
1/3 Months
Grab
Total Suspended Solids (mg/l)
30
NA
60
1/3 Months
Composite(4)
Total Residual Chlorine(5)
								(mg/l)
0.011
NA
0.011
1/3 Months
Grab
NL - No Limitation, monitoring requirement
							 only
NA - Not applicable
(1)Reports of quarterly
							 monitoring shall be submitted to the DEQ regional office no later than the 10th
							 day of April, July, October, and January.
(2)Reported estimated flow
							 may be based on the technical evaluation of the sources contributing to the
							 discharge.
(3)Where the Water Quality
							 Standards (9VAC25-260) establish alternate standards for pH in waters receiving
							 the discharge, those standards shall be the minimum and maximum effluent
							 limitations.
(4)Composite - For
							 continuous discharges, five grab samples collected at hourly intervals. For
							 batch discharges, five grab samples taken at evenly placed intervals for the
							 duration of the discharge, or until a minimum of five grab samples have been
							 collected. For batch discharges, the first grab shall occur within 15 minutes
							 of commencement of the discharge. Composite sample procedures for batch
							 discharges unable to meet the requirements in this table may be approved by DEQ
							 on a case-by-case basis.
(5) Total residual
							 chlorine limit shall only be applicable if chlorine is present in the process
							 wastewater.
2.
				Reverse osmosis and nanofiltration plants.
During the period beginning with the permittee's coverage
				  under this general permit and lasting until the permit's expiration date, the
				  permittee is authorized to discharge process wastewater originating from
				  outfalls: __________
Such discharges shall be limited and monitored as specified
				  below:
EFFLUENT CHARACTERISTICS
EFFLUENT LIMITATIONS
MONITORING REQUIREMENTS
Monthly Average
Minimum
Maximum
Frequency
Sample Type
Flow (MGD)
NL
NA
NL
1/ Month
Estimate(1)
pH (SU)(2)
NA
6.0
9.0
1/ Month
Grab
Total Dissolved Solids (mg/l)
NA
NA
NL
1/ Month
Composite(3)
Total Suspended Solids
							 (mg/l)(4)
30
NA
60
1/ Month
Composite(3)
Dissolved Oxygen
							 (mg/l)(5)
NA
4.0
NA
1/ Month
Grab
Total Residual Chlorine
							 (mg/l)(6)
0.011
NA
0.011
1/ Month
Grab
NL - No limitation, monitoring requirement
							 only
NA - Not applicable
(1)Reported estimated flow
							 may be based on the technical evaluation of the sources contributing to the
							 discharge.
(2)Where the Water Quality
							 Standards (9VAC25-260) establish alternate standards for pH in waters receiving
							 the discharge, those standards shall be the minimum and maximum effluent
							 limitations.
(3)Composite - For
							 continuous discharges, five grab samples collected at hourly intervals. For
							 batch discharges, five grab samples taken at evenly placed intervals for the
							 duration of the discharge or until a minimum of five grab samples have been
							 collected. For batch discharges, the first grab shall occur within 15 minutes
							 of commencement of the discharge. Composite sample procedures for batch
							 discharges unable to meet the requirements in this table may be approved by DEQ
							 on a case-by-case basis.
(4)Applicable when
							 conventional filtration treatment discharge is part of drinking water treatment
							 and present in the process wastewater.
(5)Where the Water Quality
							 Standards (9VAC25-260) establish alternate standards for dissolved oxygen in
							 waters receiving the discharge, those standards shall be the minimum effluent
							 limitations.
(6)Total residual chlorine
							 limit shall only be applicable if chlorine is present in the process
							 wastewater.