NC0020648_Technical Correction_20210616

June 16, 2021

Ms. Hope Woolard
Water Resources Superintendent
City of Washington
PO Box 1988
Washington, North Carolina 27889

Subject: NPDES Permit Technical Correction
Permit NC0025054
Washington WWTP
Beaufort County
Grade IV Biological WPCS
SIC Code 4952

Dear Ms. Woolard:

Thank you for informing the Division of the typographical error regarding the parameter codes for
Total Nitrogen, Total Kjeldahl Nitrogen, and Nitrite/Nitrate Nitrogen. A minor technical
correction has been issued to remedy this error.

This minor technical correction does not affect any other terms, conditions, or compliance actions
covered by the permit.

If you have any questions concerning this permit, please contact Nick Coco at [phone] or
via email at [e-mail].

Sincerely,

for S. Daniel Smith, Director
Division of Water Resources, NCDEQ

Hardcopy: NPDES Files
Central Files
Ecopy: DWR/Washington Regional Office/Water Quality/Robert Tankard
DocuSign Envelope ID: 9971C839-6E7B-42B5-AA0C-84AA45706BCE
Permit NC0020648
Page 3 of 13
Revised 6/16/2021
PART I
A.(1.) EFFLUENT LIMITATIONS AND MONITORING REQUIREMENTS
[15A NCAC 02B .0400 et seq., 02B .0500 et seq.] Grade IV Biological Water
Pollution Control System [15A NCAC 08G .0302]
(a.) Beginning on the effective date of this permit and lasting until permit expiration, the Permittee is
authorized to discharge treated wastewater from outfall 001. Such discharges shall be limited
and monitored1 by the Permittee as specified below:
PARAMETER
Parameter Code
EFFLUENT LIMITATIONS MONITORING REQUIREMENTS
Monthly
Average
Weekly
Average
Daily
Maximum
Measurement
Frequency
Sample
Type
Sample
Location2
Flow 50050 3.65 MGD Continuous Recording I or E
Total Monthly Flow 82220 Monitor and Report Monthly Recorded or
Calculated I or E
BOD5 (20C) 3 80082 13.1 mg/L 19.6 mg/L 2/Week4 Composite I and E
Total Suspended Solids3 CO530 30.0 mg/L 45.0 mg/L 2/Week4 Composite I and E
Ammonia (NH3 as N) CO610 1.0 mg/L 3.0 mg/L 2/Week4 Composite E
Fecal Coliform
(geometric mean) 31616 200/100 mL 400/100 mL 2/Week4 Grab E
Total Residual Chlorine5 50060 17.0 µg/L Daily Grab E
Dissolved Oxygen 00300 Daily Average ≥ 5.0 mg/L Daily Grab E
Temperature, °C 00010 Monitor and Report Daily Grab E
pH 00400 Between 6.0 and 9.0 standard units Daily Grab E
Conductivity 00094 Monitor and Report Daily Grab E
Total Nitrogen
(NO2+NO3+TKN), mg/L CO600 Monitor and Report Weekly Composite E
Total Kjeldahl Nitrogen
(TKN), mg/L 00625 Monitor and Report Weekly Composite E
Nitrite/Nitrate Nitrogen
(NO2-N+NO3-N), mg/L 00630 Monitor and Report Weekly Composite E
TN Load6 QM600 Monitor and Report (lb/mo) Monthly Calculated E
QY600 52,054 lb/yr7 Annually Calculated E
Total Phosphorus, mg/L CO665 Monitor and Report Weekly Composite E
TP Load6 QM665 Monitor and Report (lb/mo) Monthly Calculated E
QY665 9,407 lb/yr7 Annually Calculated E
Total Hardness [as
CaCO3]8, mg/L 00900 Monitor and Report Quarterly Composite E
Acute Toxicity9 TGE6C See Note 9 Quarterly Composite E
Effluent Pollutant Scan NC01 Monitor and Report Footnote 10 E
Dissolved Oxygen, mg/L 00300 Monitor and Report Variable2 Grab U, D
Temperature, °C 00010 Monitor and Report Variable2 Grab U, D
Fecal Coliform
(geometric mean) 31616 Monitor and Report Variable2 Grab U, D
Conductivity, µmhos/cm 00094 Monitor and Report Variable2 Grab U, D
Footnotes:
1. The Permittee shall submit discharge monitoring reports electronically using NC DWR’s eDMR application system.
See Special Condition A.(7.).

(Footnotes continued on next page.)
DocuSign Envelope ID: 9971C839-6E7B-42B5-AA0C-84AA45706BCE