HomeMy WebLinkAboutNC0021253_technical correction_20150916 (3)AVA
NCDENR
North Carolina Department of Environment and Natural Resources
Pat McCrory
Governor
Frank P. Bottorff
City Manager
City of Havelock
P.O. Box 368
Havelock, NC 28532
Dear Mr. Bottorff:
Donald R. van der Vaart
Secretary
September 16, 2015
Subject: Technical Correction of NPDES Permit
Permit NC0021253
Havelock WWTP
Craven County
Class IV
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 (919) 807-6396 or by email ron.berry@ncdenr.gov.
Sincerely,
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: r4npdespermits@epa.gov
1617 Mail Service Center, Raleigh, North Carolina 27699-1617
Location: 512 N. Salisbury St. Raleigh, North Carolina 27604
Phone: 919-807-63001 Fax: 919-807-6494
Internet www.ncdenr.gov
An Equal Opportunity4Affirmative 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 CHARACTERISTICS
EFFLUENT LIMITATIONS
MONITORING REQUIREMENTS
Monthly
Average
Weekly
Average
Daily
Maximum
Measurement
Frequency
Sample
Type
Sample
Location 1
Flow (MGD)
2.25
Continuous
Recording
I or E
Total Monthly Flow (MG) 2
Monitor & Report
Monthly
Recorded or
Calculated
I or E
BOD5 3 (April 1— October 31)
1 5.0 mg/L
7.5 mg/L
Daily
Composite
I, E
BOD5 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) i
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 Tess than 6.8
S.U.
Daily
Grab
E
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) 2,4, mg/L
Monitor & Report
Weekly
Composite
E
TN Load 2
Monitor and Report (lb/month)
21,400 Ib/yr 5
Monthly
Annually
Calculated
E
Total Phosphorus (TP)
2.0 mg/L (quarterly average) °
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 7
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 BOD5 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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