Virginia Administrative Code › Title 9 - ENVIRONMENT › Agency 25 - STATE WATER CONTROL BOARD › Chapter 190 - VIRGINIA POLLUTANT DISCHARGE ELIMINATION SYSTEM (VPDES) GENERAL PERMIT REGULATION FOR NONMETALLIC MINERAL MINING › Section 9VAC25-190-70 - 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 general permit and shall
				  comply with the requirements in the general permit and be subject to all
				  requirements of
				  9VAC25-31-190.
General Permit No.: VAG84
Effective date: July 1, 2024
Expiration date: June 30, 2029
GENERAL PERMIT FOR NONMETALLIC MINERAL MINING
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 to it, owners of nonmetallic mineral mines 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, and Special Conditions, Part
				  II - Stormwater Management, and Part III - Conditions Applicable to All VPDES
				  Permits, as set forth in this permit.
Part
				I
Effluent Limitations, Monitoring Requirements, and Special
				  Conditions
A. Effluent limitations and
				monitoring requirements.
1. 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 and commingled stormwater associated with industrial
				activity from outfalls.
Such discharges shall be limited and monitored by the
				  permittee as specified in Table 1:
TABLE 1
EFFLUENT CHARACTERISTICS
DISCHARGE LIMITATIONS
MONITORING REQUIREMENTS
Monthly Average
Daily Minimum
Daily Maximum
Frequency
								(1)
Sample Type
Flow (MGD)
NL
NA
NL
1/3 Months
Estimate
Total Suspended Solids
							 (mg/l)(2)
30
NA
60
1/3 Months
Grab
pH (standard
							 units)(3)
NA
6.0
9.0
1/3 Months
Grab
NL = No Limitation, monitoring required
NA = Not Applicable
(1)1/3 Months equals the
							 following three-month periods each year of permit coverage: January through
							 March, April through June, July through September, and October through
							 December. Discharge Monitoring Reports (DMRs) of quarterly monitoring shall be
							 submitted to the department's applicable regional office no later than the 10th
							 day of April, July, October, and January.
(2)See Special Condition
							 18 with regard to conditions applicable to emergency dewatering.
(3)Where the Water Quality
							 Standards (9VAC25-260) establish alternate standards for pH, the most stringent
							 limits (technology-based or water quality-based) shall be the minimum and
							 maximum pH effluent limits.
2.
				During the period beginning with the permittee's coverage under the general
				permit and lasting until the permit's expiration date, the permittee is
				authorized to discharge stormwater associated with industrial activity that
				does not combine with other process wastewaters prior to discharge from
				outfalls.
a. Such discharges shall be
				monitored by the permittee as specified in Table 2:
TABLE 2
EFFLUENT CHARACTERISTICS
EVALUATION VALUE MONITORING
MONITORING REQUIREMENTS
Monthly Average
Daily Minimum
Daily Maximum
Frequency
								(1)
Sample Type
Flow (MG)
NA
NA
NL
1/Year
Estimate(2)
Total Suspended Solids (mg/l)
NA
NA
100 
							 (3)
1/Year
Grab
pH (standard units)
NA
NL
NL
1/Year
Grab
NL = No Limitation, monitoring required
NA = Not applicable
(1)Discharge Monitoring
							 Reports (DMRs) of yearly monitoring (January 1 to December 31) shall be
							 submitted to the department's applicable regional office no later than the 10th
							 day of January.
(2) Estimate of the total
							 volume of the discharge during the storm event.
(3) Permittees shall
							 review the results of the TSS monitoring required by Part I A 2 a to determine
							 if changes to the Stormwater Pollution Prevention Plan (SWPPP) may be
							 necessary. If the total suspended solids (TSS) monitoring results are greater
							 than the evaluation value indicated in Table 2 then the permittee shall perform
							 a routine facility inspection within five days of becoming aware of the
							 exceedance and maintain documentation as described in Part II H 3 d for that
							 outfall. Any deficiencies noted during the inspection shall be corrected within
							 60 days of being identified.
b.
				The permittee shall conduct calendar quarterly visual monitoring of stormwater
				discharges associated with the industrial activity. The monitoring shall
				include examination of stormwater samples representative of storm event
				discharges from the facility and observation of color, odor, clarity, floating
				solids, settled solids, suspended solids, foam, oil sheen, and other obvious
				indicators of stormwater pollution. Samples will be in a clean, colorless glass
				or plastic container and examined in a well-lit area. Documentation of visual
				monitoring of stormwater shall be maintained onsite in the SWPPP and include
				the examination date and time, examination personnel, outfall location, the
				nature of the discharge (i.e., runoff or snowmelt), visual quality of the
				stormwater discharge and probable sources of any observed stormwater
				contamination. Part II A regarding monitoring instructions, Part II B regarding
				representative outfalls, and Part II C regarding sampling waivers shall apply
				to the taking of samples for visual monitoring except that the documentation
				required by these sections shall be retained with the SWPPP rather than
				submitted to the department. Calendar quarters equal the following three-month
				periods each year of permit coverage: January through March, April through
				June, July through September, and October through December.