NC0031828_Permit (Modification)_20190920

DocuSign Envelope ID: E59FDB64-68D3-4C45-9D51-453DB52FC218
ROY COOPER
Governor
MICHAEL S. REGAN
Secretary
LINDA CULPEPPER
Director
NORTH CAROLINA
EnvbvAmrytraI Qrtalfly
9/20/2019
Mr. Chad Braxton
City of Vanceboro
PO Box 306
Vanceboro, NC 28586-0306
Subject: Change -Page to Address Modification
NPDES Permit NCO031828
Vanceboro WWTP
Grade III Biological WPCS
Craven County
Dear Mr. Braxton:
Division personnel have reviewed and approved your request for modification of the subject permit.
Please insert these change pages into your existing permit and discard the old pages. We regret any
inconvenience this causes your organization.
The modified permit includes the following significant changes from the existing permit:
1. Monitoring has been reduced to weekly for pH, dissolved oxygen, BOD, total suspended solids,
NH3 as N, fecal coliform, and upstream and downstream temperature in Section A. (1) as a
policy is in development regarding facilities with higher classifications due to nutrient limits.
2. Monitoring has been reduced to 2/week for TRC in Section A. (1) as a policy is in development
regarding facilities with higher classifications due to nutrient limits.
3. Compliance schedule has been removed in in Section A. (1) as footnotes 9 and 10 as the
increased monitoring no longer applies.
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 any other Federal, State, or Local governmental permit that may be required.
If you have any questions or need additional information, please do not hesitate to contact Brianna
Young of my staff at [phone].
Sincerely,
DOCUS,i�gned by:
irk
8328B44CE9EB4A1...
Linda Culpepper
Director, Division of Water Resources
D_EQ�
North Carolina Department of Environmental Quality I Division of Water Resources
1617 Mail Service Center I Raleigh, North Carolina 27699-1617
919-707-9000

DocuSign Envelope ID: E59FDB64-68D3-4C45-9D51-453DB52FC218
Mr. Chad Braxton
NC0031828 Issued Permit
cc: NPDES Files
Central files
Washington Regional Office
WSS/Aquatic Toxicology Branch

DocuSign Envelope ID: E59FDB64-68D3-4C45-9D51-453DB52FC218
Permit NCO031828
PART I
A. (1) EFFLUENT LIMITATIONS AND MONITORING REQUIREMENTS
[ 15A NCAC 02B .0400 et seq., 02B .0500 et seq.]
Grade III Biological WPCS [15A NCAC 08G .0302]
During the period beginning on the effective date of the permit and lasting until expiration, the
Permittee is authorized to discharge from outfall 001. Such discharges shall be limited and monitored'
by the Permittee as specified below:
EFFLUENT CHARACTERISTICS
LIMITS
MONITORING REQUIREMENTS
Monthly
Weekly
Measurement
Sample
2
Sample Location
Parameter Code
Average
Average
Frequency
Type
Flow 50050
0.30 MGD
Continuous
Recording
Influent or Effluent
Total Monthly Flow
Monitor & Report
Monthly
Calculated
Influent or Effluent
Total Residual Chlorine 3 50060
28 /L Dail Maximum
2/Week
Grab
Effluent
Temperature °C 00010
Daily
Grab
Effluent
Temperature (°C) 00010
Weekly
Grab
Upstream &
(June -September)
Downstream
Temperature (°C) 00010
Weekly
Grab
Upstream &
October -Ma
Downstream
pH 00400
Not < 6.0 nor > 9.0
Weekly
Grab
Effluent
Standard Units
Dissolved Oxygen 00300
Dailv Avera e > 5.0 m /L
Weekly
Grab
Effluent
Dissolved Oxygen (mg/L) 00300
Weekly
Grab
Upstream &
(June -September)
Downstream
Dissolved Oxygen (mg/L) 00300
Weekly
Grab
Upstream &
October -Ma
Downstream
BOD, 5-day (20°C) 4 C0310
5.0 mg/L
7.5 mg/L
Weekly
Composite
Influent & Effluent
A ril 1 —October 31
BOD, 5-day (20°C) 4 C0310
10.0 mg/L
15.0 mg/L
Weekly
Composite
Influent & Effluent
November 1 — March 31
Total Suspended Solids 4 C0530
30.0 m /L
45.0 m /L
Weekly
Composite
Influent & Effluent
NH3 as N C0610
2.0 mg/L
6.0 mg/L
Weekly
Composite
Effluent
(April 1 —October 31
NH3 as N C0610
4.0 mg/L
12.0 mg/L
Weekly
Composite
Effluent
November 1 — March 31
Fecal Coliform 31616
200 / 100 ml
400 / 100 ml
Weekly
Grab
Effluent
(geometric mean
TKN m /L 00625
Monitor &
Report
2/Month
Composite
Effluent
NO2-N + NO3-N m /L 00630
Monitor & Report
2/Month
Composite
Effluent
TN m /L 5 C0600
Monitor & Report
2/Month
Composite
Effluent
TN Load 6 QM600
Monitor & Report Ib/mo
Monthly
Calculated
Effluent
TN Load 6 QY600
Monitor & Report Ib/ r
Annually
Calculated
Effluent
Total Phosphorus 7 C0665
1.0 m /L I
Monthly
Composite
Effluent
Total Mercury 8 71900
Monitor & Report
See Footnote 8
Grab
Effluent
Footnotes are on the following page.
Page 3 of 9

DocuSign Envelope ID: E59FDB64-68D3-4C45-9D51-453DB52FC218
Permit NC0031828
Footnotes:
1. The permittee shall submit discharge monitoring reports electronically using the NC DWR's eDMR
application system [see Section A. (6)].
2. Upstream = at NCSR 1440. Downstream = approximately 2 miles downstream from the outfall.
3. The Division shall consider all effluent TRC 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.
4. The monthly average effluent BOD5 and TSS concentrations shall not exceed 15% of the respective influent
value (85% removal).
5. For a given wastewater sample, TN = TKN + NO2-N + NO3-N, where TN is Total Nitrogen and TKN is Total
Kjeldahl Nitrogen.
6. TN Load is the mass load of Total Nitrogen discharged in a given period of time. See Section A. (2)
Calculation of Total Nitrogen Loads.
7. The monthly average for total phosphorus shall be the average of composite samples collected monthly.
8. Mercury must be monitored once during the permit cycle. See Section A. (5) Effluent Mercury Analysis.
ALL SAMPLES SHALL BE FROM A REPRESENATIVE DISCHARGE EVENT.
THERE SHALL BE NO DISCHARGE OF FLOATING SOLIDS OR VISIBLE FOAM IN OTHER THAN
TRACE AMOUNTS.
Page 4 of 9