NC0001406_NPDES Draft Permit_20070820

Mr. Alan Thornton.
Town of Erwin
P.O. Box 549
Erwin, North Carolina 28339
Michael F. Easley
Governor
William G. Ross, Jr., Secretary
North Carolina Department of Environment and Natural Resources
Alan W. Klimek, P.E., Director
Division of Water Quality
May 23, 2007
- DJENR-FRO
i4AY Z. 2�Od
Subject: NPDES Draft Permit
Permit No. NC0001406
Town of Erwin WWTP #21
Harnett County
Dear. Mr. Thornton:
Please find,enclosed'the DRAFT .permit for the subject wastewater treatment plant for your
review and comment. The, draft permit includes the"following modifications to. your existing
permit: .
• • A special condition is included 'iri the draft permit addressing the reopening of.the, ;
permit to include, nt.c more stringent nutrieontrols.
•
•
Please provide any comments you have regarding the draft permit to' this office'.by June.
29, 2007. - At' this time, the Division is also publishing a. notice in the newspapers of general .
circulation in Harnett County, inviting public. cominent on the draft permit. Following the 30- r
day comment period, we, will review all pertinent comments received and take appropriate:
action on the permit renewal. '
If you have any'questions concerning the draft.perinit of the other requirements foryour,
facility, please all me at [phone], extension•553.
Sincerely,
Teresa Rodriguez
NPDES Unit .
Cc: NPDES_Eiles— ------.. _
CEay tteville-Regional-Offrce = Surface.-Water4Piotectfon__t
North Carolina Division of Water Quality
Internet: h2o.enr.state.nc.us
No aturdlly
1617 Mail Service Center Raleigh, NC 27699-1617 Phone [phone] Customer Service
512 N. Salisbury St. - Raleigh, NC '27604' . . ' FAX [phone]
An Eaual O000rtunity/Affirmative Action Emolover— 50% Recircled/10% Post Consumer Paper

Permit No. NC0001406
STATE OF NORTH CAROLINA -
DEPARTMENT OF ENVIRONMENT AND NATURAL RESOURCES
DIVISION. OF WATER QUALITY
• PERMIT
TO DISCHARGE WASTEWATER UNDER THE
NATIONAL POLLUTANT DISCHARGE ELIMINATION SYSTEM
In compliance with the provisions of North Carolina General Statute 143-215:1, other lawful standards
and regulations promulgated and adopted by the North Carolina Envircinmental Management
Commission, and the Federal Water Pollution Control Act, as amended,
Town of Erwin
is hereby authorized to discharge wastewater from a facility located at
• • '
,
Erwin WWT P #2
411 South 20th Street
Erwin
Harnett County
to receiving waters designated as the Cape Fear River in the Cape Fear River Basin in accordance with
effluent limitations, monitoring requirements, and other conditions set forth in Parts I, II, III, and IV
hereof.
The permit shall become effective
This permit and the.authorization to discharge shall expire at midnight on September 30, 2011.
Signed this day
DRAFT
• Alan W. Klimek, P.E., Director
Division of Water Quality
By Authority of the Environmental Management Commission

Permit No. NC0001406
SUPPLEMENT TO PERMIT COVER SHEET
All previous„NPDES Permits issued to this facility, whether for operation or discharge are hereby revoked.-
' As of this permit issuance, any previouslyissued permit bearing this number is no longer effective.
Therefore, the exclusive authority to operate and discharge from this facili4 arises under the permit
conditions, requirements, terms, and provisions incl rr1Pd herein.
Town of Erwin
is hereby authorized to:
1 Continue to operate an existing .2:5 MGD wastewater treatment facility, at a monthly
average flow.not exceeding 0.08 MGD,. located at the Erwin WWTP. #2, 411 South 20th' Street,
Erwin, Harnett County, and consisting of the following wastewater treatment. components:
Mechanical bar Screen'
Mechanical grit chamber
• . Influent:recording flow.,measurement
■. Influent pH adjustment
■ , Parallel aeration,basins
■ Polymer feed system
■ Dual clarifiers
■ • Effluent Flow Meter.
■ Sludge storage tank
• ■ Sludge mixing/thickening tank
• . Belt filter press
2. Discharge from said treatment works, through outfall 001, into Cape Fear River, 'a Class
WS-V water in the Cape Fear. River Basin; :at the location specified on the attached map.

State Grid/Quad: F24SW/Erwin Latitude: 78° 42' 00" N
Longitude: 35° 19' 02" W
Receiving Stream: Cape Fear River Drainage Basin: Cape Fear River
Stream Class: WS-V Sub -Basin: 03-06-13
NPDES Permit No. NC0001406
Harnett County
•

Permit No. NC0001406
A (1.)- EFFLUENT LIMITATIONS AND . MONITORING REQUIREMENTS
Beginning on the effective date of this permit and lasting until expiration,,.the Permittee is authorized to
discharge treated wastewater from Outfall 001. Such discharges shall be limited and monitored by the
Permittee as specif ed below:
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.- l or E
BOD5
, 30 ing/1 • ,
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Weekly
Composite
'E,I
Total Suspended Solids2
30'mg/1 - .
, - 45 mg/1
,. Weekly ' .
:. Composite,'
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NHsN
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;Total Residual Chlorines
28 14/1 ,
2/week
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Fecal Coliform (geometric
mean)
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-: Weekly
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E
pH4
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Grab
E
'Dissolved Oxygen •
' Weekly
Grab
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.Temperature (°C)
- Weekly •.
• Grab ..
E
.Total Nitrogen.
(NO2N +'NO3N + TKN)
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Total Phosphorus _ -
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:Dissolved Oxygens
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Temperature (OC)s
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U, D
Notes: _ . .
1. Sairiple locations: E- Effluent, I- Influent, U - at least 100 yards upstream of the outfall, D- Cape Fear River at
Highway 217. '
2. The monthly average effluent BOD5 and TSS concentrations shall'not exceed 15% of the respective influent
• value (85% removal). '
3. Total Residual Chlorine requirements shall apply only if chlorine is added, to the effluent.
4. The pH shall not be less than 6.0 standard units nor greater than 9.0 standard units.
5. The daily effluent dissolved oxygen ;concentration shall not be less,than 5.0 mg/1. '
6. Instream sampling (U, D) is waived as long,as permittee retains membership in. the Middle Cape Fear, River
Basin Association (MCFRBA), which is conducting a'coordinated instream monitoring effort. If the; permittee
. leaves the MCFRBA, Instream monitoring shall begin immediately according to the requirements above, with
instream samples collected' 3/Week (June -Sept.) and 4/Week (Oct. -May). `
There shall be no discharge of floating solids or visible foam in other than trace amounts.

Permit No. NC0001406:
A. (2.) CHANGE IN OWNERSHIP OR USE OF THE FACILITY
In the event that the facility changes ownership or. a change in use of the facility'is anticipated, the
permittee shall submit a request for permit modification including the following documentation at least
180 days prior to the start of operations:
1. If manufacturing or other activities are resumed at the site, a. description of the manufacturing
processes or activities, products, and expected annual production.
2. Flow diagram indicating process and wastewater' flow volumes.
3. Proposed treatment and characteristics of the wastewater -to be discharged:.
• 4. Description of any planned expansions or upgrades tothe treatment facilities.
5. Engineering Alternatives Analysis of wastewater disposal alternatives including a flow justification,
the connection to' an existing municipal waste treatment facility and non -discharge alternatives.
6. If the facility is sold'a name ownership change form and required documentation shall be submitted
.to the Division. -
No additional discharge is authorized until the effective date of the permit modification.
A. (3.). NUTRIENT MONITORING
Pursuant to N.C. General Statutes Section 143-215:1 _ and the implementing rules found in Title 15A of
the North Carolina Administrative Code,, Subchapter 02H, specifically,=15A NCAC 02H.0112(b)(1) and
02H.0114(a), and Part II, Sections B.12. and B.13.' of this. Permit, , the Director of DWQ may reopen this '
permit to require supplemental nutrient- monitoring of the discharge.. The additional monitoring will be
to support water quality modeling efforts within the Cape Fear River Basin, and shall be. consistent .with
a monitoring plan developed jointly by the Division and affected stakeholders.