NC0021253_Technical Correction_20150916

A •••
NCDENR
North Carolina Department of Environment and Natural Resources
Pat McCrory Donald R. van der Vaart
Governor •
Secretary
September 16, 2015
Frank P. Bottorff
City Manager
City of Havelock
P.O. Box 368
Havelock, NC 28532
Subject: Technical Correction of NPDES Permit
Permit NC0021253
Havelock WWTP
Craven County
Class IV
Dear Mr. Bottorff:
Division personnel have reviewed your permit and discovered that the 2.25 MGD limitation
page pH limit is incorrect. With the relocation of the NPDES outfall to the Neuse River, a pH limit of
not greater than 8.5 S.U. nor less than 6.8 S.U. to comply with the stream classification of SB, NSW is
required. The subsequent expansion pages in your NPDES permit correctly state the required pH limit.
Enclosed is a technical corrected copy of the 2.25 MGD limitation page for NPDES Permit
NC0021253. Please replace this limitation page in your current NPDES permit with the corrected
limitation page and discard the removed page. This technical correction does not affect any other
terms, conditions, or compliance actions covered by the current NPDES permit.
If you have any questions concerning this permit technical correction, please contact Ron Berry
by phone [phone] or by email [e-mail].
Sincerely,
rP' • S. Jay Zimmerman, P.G.
Director, Division of Water Resources
Enclosure: 2.25 MGD limitation page for NPDES Permit NC0021253
cc: NPDES File
Central Files
Washington Regional Office/Water Quality Programs
ecopy:
EPA Region IV (Subject: SIC4952)
Email: [e-mail]
1617 Mail Service Center,Raleigh,North Carolina 27699-1617
Location 512 N Salisbury St.Raleigh,North Carolina 27604
Phone:[phone] Fax:[phone]
Internet www ncdenr gov
An Equal OpportunityiAffirmative Action Employer

Permit NC0021253
(Continued A.(1) EFFLUENT LIMITATIONS AND MONITORING REQUIREMENTS)
7. The quarterly average for total phosphorus shall be the average of composite samples collected weekly during
each calendar quarter(January-March,April-June,July-September,October-December).
8. Chronic Toxicity(Ceriodaphnia)@ 90% conducted in January,April,July and October;see special condition A. (8)
of this permit.
b. There shall be no discharge of floating solids or visible foam in other than trace amounts.
c. See special condition A.(12) if chlorine or a chlorine derivative is utilized.
A.(2) EFFLUENT LIMITATIONS AND MONITORING REQUIREMENTS
a. Beginning upon expansion to 2.25 MGD and receipt of the signed Engineering Certificate, and
lasting until permit expiration or further expansion, the Permittee is authorized to discharge 2.25
MGD of treated municipal wastewater from Outfall 001 through a submerged multiport diffuser
into the Neuse River. Such discharges shall be limited and monitored by the Permittee as specified
below:
EFFLUENT LIMITATIONS MONITORING REQUIREMENTS
EFFLUENT CHARACTERISTICS Monthly Weekly Daily Measurement Sample Sample
Average Average Maximum Frequency Type Location
Flow(MGD) 2.25 Continuous Recording I or E
Total Monthly Flow(MG)2 Monitor&Report Monthly Recorded or I or E
alculBODS 3 (April 1—October 31) 5.0 mg/L 7.5 mg/L Daily Composite I, E
BODS 3 (November 1—March 31) 10.0 mg/L 15.0 mg/L Daily Composite I,E
Total Suspended Solids(TSS)3 30.0 mg/L 45.0 mg/L Daily Composite I,E
Ammonia as N(NH3-N) 1.0 mg/L 3.0 mg/L Daily Composite E
Dissolved Oxygen(DO) Not less than 5.0 mg/L,daily average Daily Grab E
Enterococci(geometric mean) 35/100 mL 276/100 mL Daily Grab E
pH Not greater than 8.50 nor less than 6.8 Daily Grab E
S.U.
Temperature,°C Daily Grab E
TKN 4 mg/L Monitor&Report Weekly Composite E
NO2-N + NO3-N 4, mg/L Monitor&Report Weekly Composite E
Total Nitrogen(TN)Z,4,mg/L Monitor&Report Weekly Composite E
TN Load 2 Monitor and Report(lb/month) Monthly
21,400 lb/yr S Annually Calculated
Total Phosphorus(TP) 2.0 mg/L(quarterly average)6 Weekly Composite E
Total Copper, pg/L Quarterly Composite E
Total Mercury(Method 1631E), ng/L Quarterly Grab E
Total Zinc, pg/L Quarterly Composite E
Chronic Toxicity? Quarterly Composite E
Effluent Pollutant Scan See A.(10) E
Footnotes:
1. I=Influent. E=Effluent. See special condition A.(5.)(b.)for instream monitoring requirements and conditional
waiver.
2. Total Monthly Flow and Total Nitrogen are required to calculate TN Load.See special condition A. (6)for
calculation and reporting requirements.
3. The monthly average BODS and Total Suspended Solids concentrations shall not exceed 15% of the respective
influent value(85%removal).
4. For a given wastewater sample,TN=TKN+ (NO3-N+NO2-N),where TN is total nitrogen,TKN is total
Kjeldahl Nitrogen,and(NO3-N+NO2-N)are nitrate/nitrite nitrogen,respectively.
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