NC0020567_Technical Correction_20240314

DocuSign Envelope ID:4CO40BF3-7lE8-4C23-A855-06C9D3FEODDE
ROY COOPER
Governor
ELIZABETH S. BISER
Secretary
RICHARD E. ROGERS, JR.
Director
NORTH CAROLINA
Environmental Quality
March 13, 2024
Ms. Nicole Johnston, Executive Director
Yadkin Valley Sewer Authority
PO Box 828
Elkin, North Carolina 28621
Subject: NPDES Permit Technical Correction
Permit NCO020567
YVSA WWTP
Surry County
Grade III Biological WPCS
SIC Code 4952
Dear Ms. Johnston:
The Division issued a final permit to your facility on March 12, 2024. In response to comments to the permit
by the Town on March 12, 2024, monitoring frequencies for pH and Total Residual Chlorine (TRC) have
been corrected from daily to 3/week on the effluent sheet [Section A.(1.)] per 15A NCAC 02B .0500 and
consistent with previous permits as well as the current fact sheet. Accordingly, we hereby forward the
corrected permit page (Pages 3 of 11). Please insert the changed page into your permit.
All other terms and conditions in the original permit remain unchanged and in full effect as of April 1, 2024.
This is a minor technical correction.
Please note that this permit is not transferable except after notice to the Division. The Division
may require modification or revocation and reissuance of the permit. This permit does not affect
the legal requirements to obtain other permits which may be required by the Division of Water
Resources or any other Federal, State, or Local governmental regulations.
If you have any questions concerning this permit, please contact Gary Perlmutter at (919) 707-
3611 or via email at [e-mail].
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Michael J. Montebello, NPDES Permitting Branch Chief
Division of Water Resources, NCDEQ
D E Q�� North Carolina Department of Environmental Quality I Division of Water Resources
512 North Salisbury Street 1 1611 Mail Service Center I Raleigh, North Carolina 27699-1611
NORTH CARouNA 919.707.9000
Depanmem of Envlronmenfal Duali�

DocuSign Envelope ID:4CO40BF3-7lE8-4C23-A855-06C9D3FEODDE
Hardcopy: NPDES Files
eCopy: US EPA Region 4
DWR/Winston Salem Regional Office/Water Quality/Lon Snider & Jenny Graznak
DWR/Aquatic Toxicology Branch/Cindy Moore & Molly Nicholson
Veolia North America/Hal Transou (ORC), Lisa Morris
D E Q�� North Carolina Department of Environmental Quality I Division of Water Resources
512 North Salisbury Street 1 1611 Mail Service Center I Raleigh, North Carolina 27699-1611
NORTH CAROLINA 919.707.9000
oepnmem or Enmmomanmi m.m�

DocuSign Envelope ID:4CO40BF3-7lE8-4C23-A855-06C9D3FEODDE
Permit NCO020567
PART I
A.(L) EFFLUENT LIMITATIONS AND MONITORING REQUIREMENTS (1.8 MGD)
[ 15A NCAC 02B .0400 et seq., 15A NCACO2B .0500 et seq.]
Grade IV Biological Water Pollution Control System [15A NCAC 08G .03021
(a.) During the period beginning on the effective date of the permit and lasting until permit expiration,
the Permittee is authorized to discharge treated municipal and industrial wastewater from Outfall
001. Such discharges shall be limited and monitored' by the Permittee as specified below:
PARAMETER
Parameter Code
EFFLUENT LIMITS
MONITORING REQUIREMENTS
Monthly
Average
Weekly
Average
Daily
Maximum
Measuremen
t Frequency
Sample
Type
Sample
Location'
Flow 50050
1.8 MGD
Continuous
Recording
I or E
BOD, 5-day, 20°C 3 C0310
30.0 mg/L
45.0 mg/L
2/week 4
Composite
I and E
Total Suspended Solids (TSS) 3 C0530
30.0 mg/L
45.0 mg/L
2/week4
Composite
I and E
Ammonia (NH3 as N) C0610
Monitor and Report
Weekly
Composite
E
Fecal Coliform 31616
(geometric mean)
200/100 mL
400/100 mL
2/week4
Grab
E
pH 00400
Between 6.0 and 9.0 Standard Units
3/week
Grab
E
Total Residual Chlorine 5 50060
1 128 µg/L
3/week
Grab
E
Temperature (°C) 00010
Monitor and Report
Daily
Grab
E
TKN (mg/L) 00625
Monitor and Report
Monthly
Composite
E
NO3-N + NO2-N (mg/L) 00630
Monitor and Report
Monthly
Composite
E
Total Nitrogen 6 (mg/L) C0600
Monitor and Report
Monthly
Calculated
E
Total Phosphorus (mg/L) C0665
Monitor and Report
Monthly
Composite
E
PFAS 7 (ng/L) various
Monitor and Report
Quarterly
Composite
E
Chronic Toxicity' TGP3B
Monitor and Report
Quarterly
Composite
E
Effluent Pollutant Scan NCO]
Monitor and Report
Footnote 9
Footnote 9
E
Footnotes:
1. The Permittee shall submit Discharge Monitoring Reports electronically using NC DWR's eDMR application
system. See Special Condition A.(6.).
2. Sample locations I = Influent, E = Effluent.
3. The monthly average effluent BOD5 and TSS concentrations shall not exceed 15% of the respective influent value
(85% removal).
4. Twice per week sampling must occur on any two non-consecutive days during the calendar week.
5. The facility shall monitor TRC when using chlorination for disinfection. The Division shall consider all effluent
total residual chlorine values reported below 50 µg/L to be in compliance with the permit. However, the permittee
shall continue to record and submit all values reported by a North Carolina certified laboratory (including field
certified), even if these values fall below 50 µg/L.
6. For a given wastewater sample, TN = TKN + NO3-N + NOz-N, where TN is Total Nitrogen, TKN is Total Kjeldahl
Nitrogen, and NO3-N and NO2-N are Nitrate and Nitrite Nitrogen, respectively.
7. See Special Condition A.(5.).
8. Chronic Toxicity (Ceriodaphnia dubia) Pass/Fail at 0.87% with testing in March, June, September, and
December. See Special Condition A.(2.).
9. The Permittee shall perform three effluent pollution scans during the term of this permit. See Special Condition
A.(3.).
(b.) There shall be no discharge of floating solids or visible foam in other than trace amounts.
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Page 3 of 11 Michael Montebello, NPDES Branch Chief
Date: March 13, 2024