NC0081736_Permit Issuance_20020423

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Wyatt Blanchard, County Engineer
New Hanover County
414 Chestnut Street
Wilmington, North Carolina 28401-4045
Dear Mr. Blanchard:
Michael F. Easley
Governor
William G. Ross, Jr., Secretary
North Carolina Department of Environment and Natural Resources
Gregory J. Thorpe, Ph.D., Acting Director
Division of Water Quality
April 23, 2002
Subject: Issuance of NPDES Permit NCO081736
New Hanover County Airport WWTP
New Hanover County
Division staff have reviewed and approved your application for an NPDES discharge permit. Accordingly,
the Division is forwarding the subject NPDES permit. This permit is issued pursuant to the requirements of
North Carolina General Statute 143-215.1 and the Memorandum of Agreement between North Carolina and
the U.S. Environmental Protection Agency dated May 9,1994 (or as subsequently amended).
The following items appear in this FINAL permit:
• Change in the effluent ammonia limits to 1 mg/L (summer) and 2 mg/L (winter) based on the 2000
Cape Fear River Basin Plan recommendations for new and expanding municipal plants from Lock &
Dam #1 to the Cape Fear Estuary, due to low instream dissolved oxygen levels.
• Increase in monitoring frequency for several effluent parameters, based on the monitoring
requirements for a Class IV WWTP specified in 15A NCAC 2B.0500 Surface Water Monitoring
Requirements.
• Provision for waiving the instream monitoring requirements, provided the instream monitoring
responsibility is assumed by the Lower Cape Fear River Basin Association.
• Change in the permit expiration date to November 30, 2006.
• Based on comments received from US EPA, the ammonia limit should be expressed as a monthly
average limit as well as a weekly average limit. This final permit only contains a monthly average
limit. Therefore, a new Special Condition (A. (3.) - Ammonia Reopener) has been added to this final
permit. The Division may reopen this permit and add a weekly average ammonia limit if there is
reasonable potential for this discharge to exceed allowable concentrations. If there is not reasonable
potential, then a weekly average ammonia limit will be developed and added at the next permit
renewal.
Please note that this proposed facility will discharge to an impaired (303(d) listed) water. The Division
supports the current efforts of the County and City of Wilmington to pursue a regional facility in this area
through upgrade/expansion of the existing Wilmington Northside WWTP (NC0023965). It is our
understanding that the County and City have agreed to this regional concept, and design for expansion of the
Wilmington Northside WWTP is now under way. Provided expansion of the Wilmington Northside WWTP
is approved by the Division, we understand that the County will request rescission of this Airport WWTP
permit.
N. C. Division of Water Quality / NPDES Unit Phone: [phone]
1617 Mail Service Center, Raleigh, NC 27699-1617 fax: [phone]
Internet: h2o.enr.state.nc.us DENR Customer Service Center 1 800 623-7748

Permit NCO081736
Page 2
If any parts, measurement frequencies, or sampling requirements contained in this permit are unacceptable to
you, you have the right to an adjudicatory hearing upon written request within thirty (30) days following
receipt of this letter. This request must be in the form of a written petition, conforming to Chapter 150B of
the North Carolina General Statutes, and filed with the office of Administrative Hearings, 6714 Mail Service
Center, Raleigh, North Carolina 27699-6714. Unless such a demand is made, this permit shall be final and
binding.
Please take notice 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 other permits which may be required by the Division of Water Quality, the Division
of Land Resources, the Coastal Area Management Act, or any other federal or local governmental permit.
If you have any questions concerning this permit, please contact Tom Belnick at telephone number (919)
733-5083, extension 543.
Sincerely,
Original Signed By
David A. Goodrich
Gregory J. Thorpe, Ph.D.
cc: Central Files
NPDES Unit.
EPA Region 4
Wilmington Regional Office, Water Quality
Technical Assistance & Certification Unit
Aquatic Toxicology Unit

Permit No. NCO081736
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 provision of North Carolina General Statute 143-215.1, other lawful
standards and regulations promulgated and adopted by the North Carolina Environmental
Management Commission, and the Federal Water Pollution Control Act, as amended,
New Hanover County
is hereby authorized to discharge wastewater from a facility located at
New Hanover County Airport WWTP
North 23rd Street
Wilmington, North Carolina
New Hanover 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 June 1, 2002
This permit and the authorization to discharge shall expire at midnight on November 30, 2006
Signed this day April 23, 2002
Qriginal Signed By
David A. Goodrich
Gregory J. Thorpe, Ph.D., Acting Director
Division of Water Quality
By Authority of the Environmental Management Commission

Permit No. NCO081736
SUPPLEMENT TO PERMIT COVER SHEET
New Hanover County
is hereby authorized to:
1. Construct and operate, after receiving an Authorization to Construct, a 4.0 MGD
wastewater treatment system to be located at New Hanover County Airport
WWTP, North 23rd Street near New Hanover County Airport, Wilmington, Hanover
County; and
2. Discharge from said treatment works (via Outfall 001) into the Cape Fear River, a
Class SC water in the Cape Fear River Basin, at the location specified on the
attached map.

Permit No. NCO081736
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
specified below:
EFFLUENT
CHARACTERISTICS
EFFLUENT LIMITATIONS
MONITORING REQUIREMENTS
Monthly
Average
Weekly
Average
Daily
Maximum
Measurement
Frequency
Sample
Type
Sample
Location'
Flow
4.0 MGD
Continuous
Recording
I or E
BOD2, 5-day, 200C (Summer)
5.0 mg/1
7.5 mg/l
Daily
Composite
E, I
BOD2, 5-day, 20'C (winter)
10.0 mg/I
15.0 mg/I
Daily
Composite
E. 1
Total Suspended Residue2
30.0 mg/I
45.0 mg/1
Daily
Composite
E. I
NH3 as N (Summer)
1.0 mg/1
-f S 3
Daily
Composite
E
NH3 as N (winter)
2.0 mg/1
-& : (y
Daily
Composite
E
Total Residual Chlorine3
13 ug/1
Daily
Grab
E
Fecal Coliform (geom.mean)
200/ 100 ml
400/ 100 m]
Daily
Grab
E
Dissolved Oxygen4
Daily
Grab
E
Temperature, °C
Daily
Grab
E
Conductivity
Daily
Grab
E
pH5
Daily
Grab
E
Total Lead
2/Month
Composite
E
TotalNitrogen (NO2+NO3+TKN)
Monthly
Composite
E
Total Phosphorus
VL CF.
Monthly
Composite
E
Acute Toxicity6
Quarterly
Composite
E
Dissolved Oxygen
3/Week7
Grab
Ul, U2, D
Temperature, 'C
3/Week'
Grab
Ul, U2, D
Notes:
1. Sample locations: E- Effluent, I- Influent, UI- Upstream in NE Cape Fear River ® Hwy 421, U2- Upstream at
Muddy Point, D- Downstream at Port Authority.
2. The monthly average effluent BOD5 and TSS concentrations shall not exceed 15% of the respective influent
value (850/6 removal).
3. Limit applies only if chlorine is used for disinfection.
4. The daily effluent dissolved oxygen concentration shall not be less than 6.0 mg/l.
5. The pH shall not be less than 6.8 standard units nor greater than 8.5 standard units.
6. Acute Toxicity (Fathead Minnow 24-hr), P/F ® 90%, March, June, Sept., Dec., refer to Special Condition A(2).
7. Instream monitoring shall be conducted 3/Week (June -Sept.) and 1/Week (Oct. -May). Instream monitoring
may be waived if the monitoring responsibility is assumed through participation in the Lower Cape Fear River
Basin Association.
(Summer) = April 1- October 31
(Winter) = November 1 - March 31
There shall be no discharge of floating solids or visible foam in other than trace amounts.

Permit NCO081736
SPECIAL CONDITIONS
A. (2.) ACUTE TOXICITY PASS/FAIL PERMIT LIMIT (QRTRLY)
The permittee shall conduct acute toxicity tests on a quarterly basis using protocols defined in the North Carolina
Procedure Document entitled "Pass/Fail Methodology For Determining Acute Toxicity In A Single Effluent
Concentration" (Revised July, 1992 or subsequent versions). The monitoring shall be performed as a Fathead
Minnow (Pimephaler promelas) 24 hour static test. The effluent concentration at which there may be at no time
significant acute mortality is 90% (defined as treatment two in the procedure document). Effluent samples for self -
monitoring purposes must be obtained during representative effluent discharge below all waste treatment. The tests
will be performed during the months of March, June, September, and December.
All toxicity testing results required as part of this permit condition will be entered on th uent Discharge
Monitoring Form (MR-1) for the month in which it was performed, using the parameter cod TGE6C. dditionally,
DWQ Form AT-2 (original) is to be sent to the following address:
Attention: NC DENR / DWQ / Environmental Sciences Branch
1621 Mail Service Center
Raleigh, North Carolina 27699-1621
Completed Aquatic Toxicity Test Forms shall be filed with the Environmental Sciences Branch no later than 30 days
after the end of the reporting period for which the report is made.
Test data shall be complete and accurate and include all supportirig chemical/physical measurements performed in
association with the toxicity tests, as well as all dose/response data. Total residual chlorine of the effluent toxicity
sample must be measured and reported if chlorine is employed for disinfection of the waste stream.
Should there be no discharge of flow from the facility during a month in which toxicity monitoring is required, the
permittee will complete the information located at the top of the aquatic toxicity (AT) test form indicating the facility
name, permit number, pipe number, county, and the month/year of the report with the notation of "No Flow" in the
comment area of the form. The report shall be submitted to the Environmental Sciences Branch at the address cited
above.
Should any single quarterly monitoring indicate a failure to meet specified limits, then monthly monitoring will begin
immediately until such time that a single test is passed. Upon passing, this monthly test requirement will revert to
quarterly in the months specified above.
Should the permittee fail to monitor during a month in which toxicity monitoring is required, then monthly
monitoring will begin immediately until such time that a single test is passed. Upon passing, this monthly test
requirement will revert to quarterly in the months specified above.
Should any test data from either these monitoring requirements or tests performed by the North Carolina Division of
Water Quality indicate potential impacts to the receiving stream, this permit may be re -opened and modified to
include alternate monitoring requirements or limits.
NOTE: Failure to achieve test conditions as specified in the cited document, such as minimum control organism
survival and appropriate environmental controls, shall constitute an invalid test and will require immediate follow-up
testing to be completed no later than the last day of the month following the month of the initial monitoring.
A. (3.) AMMONIA REOPENER
The Division may re -open this permit to require weekly average limits for ammonia. After calculating allowable
concentrations, the Division will perform an analysis of past ammonia data to determine if there is a reasonable
potential for this discharge to exceed these potential limits. If there is, this permit will be re -opened. If there is not,
the permit will not be re -opened, but will contain weekly average limits for ammonia upon renewal.

STATE OF NORTH CAROLINA F�(G�a V
COUNTY OF NEW HANOVER j I^
I PUBLIC OP Ni Before the undersigned, a Notary Public of Said County and State,
NORTH CAROLINA
ENVIRONMENTAL
MANAGEMENT DIANE P. KEENAN
COMMISSIONIMPOES UNIT
1617 Mall Service Center
Rale!gh, INC 27699-1617
liq IFICATION of INTENT Who, being duly sworn or affirmed, according to the law, says that he/she is
On the basis or thorough I' N CLASSIFIED ADVERTISING MANAGER
to the per- I
)elow effec-.!
from the
of this no,
comments
the pro{
ill be accu
In
.on file used to
ui u:uu a.m.
and' SOU p,m. to review
information on file.:
NPDES Permit Number
HANOVER CO - NEW:
pll! WVPP, 3002 US HIGHWAY
421 NORTH. WILMING-
TON, NC 28401 has ap
Tll plied for a pen»t4 renewal
for a faculty -located In
NEW HANOV♦:RCounty
dischary'rcig treated
Wastewaterinto [he NE
CAPE FEAR RIVER in the
CAPE FEAR River Basin.
Currently no paameters.
of THE WILMINGTON STAR -NEWS, INC., a corporation organized and doing business under
the Laws of the State of North Carolina, and publishing a newspaper known as WILMINGTON
MORNING STAR & SUNDAY STAR -NEWS in the City of Wilmington
PUBLIC NOTICE STATE OF NORTH CAROLINA ENVIRONMENTAL MANAGEMENT
COMMISSION/NPDES UNIT 1617 Mail Service Center Raleigh, NC 27699-1617
NOTIFICATION OF INTENT TO ISSUE A NPDES WASTEWATER PERMIT On the basis
of thorough staff review and application of NC
was inserted in the aforesaid newspaper in space, and on dates as follows:
121151x &
And at the time of such publication Wilmington Star -News was a newspaper meeting all the
requirements and qualifications prescribed by Sec- o. 1-597 G.S. of N.C.
o Y0.,.'C'
r
Title: CLASSIFIED ADVER. MGR
Sworn or affirmed to, and subscribed before me this 17TA day of
nF-t'F-MAF-R 1 A.D.,2(In I
In Testimony Whereof, I have hereunto set my hand and affixed my official seal, the day and
year aforesaid. Z­_1 —%„
Notary
My commission expires 14TH day of AUGUST 20 06
aforegoing affidavit with the advertisement thereto annexed it is adjudged by the Court that the said
roperly made, and that the summons has been duly and legally served on the defendant(s).
Clerk of Superior Court

NC0081136- New Hanover County/Airport WWTI Lr
Subject: NC0081736- New Hanover County/Airport WWTP
Date: Tue, 16 Apr 2002 09:49:58 -0400
From: Tom Belnick <[e-mail]>
To: Marshall Hyatt <[e-mail]>
Hi Marshall- I think the only outstanding item left on this one was the
NH3 issue. If I add the NH3 reopener is this ready to go? This is the
unbuilt facility that may be rescinded in the future. Thanks
Mailto:[e-mail]
' N.0 DENR-DWQ/NPDES Unit
1617 Mail Service Center, Raleigh NC 27699-1617
Work: [phone] ext. 543
Fax: [phone]
Re: NC0081736- New Hanover County/Airport WWTP
Subject: Re: NC0081736- New Hanover County/Airport.WWTP
Date: Tue, 16 Apr 2002 10:30:15 -0400
From: [e-mail]
To: Tom Belnick <[e-mail]>
yes, it's ready to go.

Re: quick comments on NC81736 - New Hanover Co. Airport WWTP
Subject: Re: quick comments on NC81736 - New Hanover Co. Airport WWTP
Date: Tue, 19 Feb 2002 10:24:41 -0500
From: Tom Belnick <[e-mail]>
To: [e-mail]
CC: Dave Goodrich <[e-mail]>,
Mike Templeton <[e-mail]>
Hi Marshall- looks like we're keeping you busy! I'll wait till I hear
further on the NH3 issue. I'll add total for the metals in the final.
There are no nutient limits since the receiving stream is not classified as
nutrient sensitive water (NSW). In the Cape Fear River basin, the House
Bill 515 nutrient management strategy pertains to the NSW waters draining
to Jordon Lake in the upper basin (subbasins 030601-030606). NSW
designation (and HB515 requirements) also apply to all of the Neuse River
basin.
PS- I haven't received EPA comments yet for the Durham Triangle facility
(NC0026051). I did receive your comments for the two Greensboro
facilities, and will address those shortly.
[e-mail] wrote:
> 1. re the permit not containing weekly average limits for NH3, I knowv/
> (and you know) we are discussing this with Dave.
> 2. Based on our recent agreement, I assume when this permit is issuedIX
> it will specify lead as "total".
> 3. Pls help me understand. This is a new discharge to the Cape Fear
> basin - why doesn't the permit include nutrient limits?
> thanks. Marshall
Mailto:[e-mail]
N.0 DENR-DWQ/NPDES Unit
1617 Mail Service Center, Raleigh NC 27699-1617
Work: [phone] ext. 543
Fax: [phone]
1 of 1 2/19/02 10:25 AM

NCDENR / DWQ
FACT SHEET FOR NPDES PERMIT DEVELOPMENT
New Hanover County
NPDES No. NCO081736
Facility Information
(1.) Facility Name:
New Hanover County Airport WWTP
(2.) Permitted Flow,MGD:
4 MGD
(6.) County:
New Hanover
(3.) Facility Class:
4
(7.) Regional Office:
Wilmington
(4.) Facility Status:
Unbuilt
(S.) USGS Topo Quad:
K27NW
(5.) Permit Status:
Renewal
(9) USGS Site:
Wilmington
Stream Characteristics
(1.) Receiving Stream:
Cape Fear River
(2.) Subbasin:
030617
(S,) Drainage Area (mi2):
Tidal
(3.) Index No.:
(9.) Summer 7Q10 (cfs)
Tidal
(4.) Stream Class:
SC
(10.) Winter 7Q10 (cfs):
Tidal
(5.) 303(d) Listed:
YES
(11.) 30Q2 (cfs):
Tidal
(6.) 305(b) Status:
(12.) Average Flow (cfs):
Tidal
(7.) Use Support:
(13.) IWC (%):
I Tidal
Conditions Incorporated into Permit Renewal
Proposed Conditions
Parameters Affected
Basis for Condition(s)
Change summer limit from 2
Effluent- Ammonia
Based on Cape Fear Basin
mg/1 to 1 mg/l, and change
Plan 2000 Recommendations
winter limit from 4 mg/l to 2
for new/expanding municipal
mg/l.
plants in Cape Fear River
from L&D # 1 to CFR Estuary,
due to low DO levels.
Change monitoring frequency
Effluent- BOD, TSS, NH3,
Based on 15A NCAC 2B.0500
to daily.
DO, Fecal, TRC
Monitoring Requirements for
a Class 4 WWTP.
Change monitoring frequency
Effluent- Lead
Based on NPDES Toxics
from monthly to 2/month.
Monitoring Policy for a Class
4 WWM, toxicant, non -
limited.
�J % �% A, 3 6 cyr#1.11

NPDES PERMIT FACT SHEET
Page 2
New Hanover County
NPDES No. NCO081736
Provide for instream
Instream Monitoring Waiver
Provided for under
monitoring waiver if facility's
Memorandum of Agreement,
instream monitoring
to allow waiver of individual
responsibility is assumed by
facility instream monitoring
the Lower Cape Fear River
provided comprehensive
Basin Association.
instream monitoring is
assumed by a monitoring
coalition.
Change permit expiration
Permit Expiration Date
Per Cape Fear River Basin
date to 11 /30/06.
permit renewal schedule.
PROJECT NOTES
Summary
• This is a permit renewal for the New Hanover County Airport WWTP, which is a MAJOR
Municipal (4 MGD design flow). This facility has not been constructed yet, and an ATC
permit has not been applied for. Originally the County obtained the subject permit to
provide expanded treatment capacity for the County area. According to the permittee, the
County and the City of Wilmington are now proposing to expand the city's existing
Northside WWTP (NC0023965) as a joint regional facility. An agreement for this
County/City WWTP has been put in place, and design for expansion of the combined
County/City regional WWTP is now under way. Provided the County/City WWTP expansion
is approved and permitted, the County will then request rescission of this subject NPDES
permit.
• This proposed County Airport WWTP would discharge to the Cape Fear River just below its
confluence with the NE Cape Fear River. This river segment is listed as impaired on the
state 303(d) list due to low dissolved oxygen, and a TMDL is currently under development in
cooperation with the Lower Cape Fear River Association. Until an EPA approved TMDL to
address low DO is in place to guide wasteload allocation decisions, the recommended Cape
Fear River Basin 2000 strategy calls for summer limits of BOD5= 5 mg/1 and NH3-N= 1
mg/1 for new/expanding municipal/domestic discharges > 1 MGD.
Permit Development
• The facility submitted a permit renewal application on June 1, 2001. The permit expires on
November 30, 2001.
• The previous permit was based on advanced tertiary effluent limits. This permit renewal
incorporates more stringent ammonia limits (1 mg/1 NH3-N summer, 2 mg/1 NH3-N winter)
based on BAT for major municipals and the applicable Cape Fear River Basin Permitting
Strategy. Monitoring frequencies have also been updated to reflect requirements for a Class
4 facility.
No industrial discharges were projected for this proposed WWTP.
DMR Data.
• Effluent Chemical/Physical Data. Not applicable, since facility is unbuilt.
• Effluent Toxicily Data. Not applicable, since facility is unbuilt.
• Instream Data. Not applicable, since facility is unbuilt.
• Compliance Data. Not applicable, since facility is unbuilt.
WI,A Data.
• Last completed in January 1996.
Region Data.
• The WiRO submitted a staff report dated 8/30/01. The WiRO recommended permit renewal
for another 5-year period. The WIRO also recommended that the new permit reflect the
more stringent NH3-N effluent limits, and provide for an instream monitoring waiver if
monitoring is assumed by the Lower. Cape Fear River Basin monitoring coalition.
Page 2
Version: December 11, 2001

NPDES PERMIT FACT SHEET New Hanover County
Page 3 NPDES No. NCO081736
Proposed Schedule for Permit Issuance
Draft Permit to Public Notice: 12/ 19/01
Permit Scheduled to Issue: 02/04/02
State Contact
If you have any questions on any of the above information or on the attached
permit, please contact Tom Belnick at [phone], extension 543.
Copies of the following are attached to provide further information on the permit
development:
• Draft Permit
NPDES Recommendation by:
l2 11-01
Signature Date
Regional Office Comments
Regional Recommendation
bb . Signature Date
Reviewed and accepted by.:
Regional Supervisor:
Signature
Date
NPDES Unit Supervisor:
Signature
I Date
Page 3
Version: December 11, 2001

NCO081736
New Hanover County
Wyatt Blanchard. County Engineer
Mr. Blanchard
414 Cheanut Street
Wilmington
North Carolina
28401-4(N5
New Hanover County Airport W WIP
North 23rd Street
wamingam
North CamW
North 23rd Street
Wilmington
New Hanover
Cape Fear R er
SC
Cape Fear
030617
UnbuUt
4 MGD
Wilmington
Tom BehAck
543
Tom BeWck
NPDES that
Renewal
atua
Proposed
4952
01
Major
Minor
06
Subminor
17
,-A
0
34
M
14
S
29
Tmt Unit Coda
i Cued Map No.
Uund Map Name
m Index No.
Notes Mt.;
57
11
MU
Major
101
R27NW
WitnWtgmn
12/19/01
02/04/02
d) listed (YIN)
b) listed (YIN)
Support (S. ST, PS, NS)
nape Arm (a9. ml.):
10(ela):
110 (pie):
t laa):
S Ste. No
YES
Tidal
Md.]
Tidal
71dal
T1dat
Tidal

110�
Date:
Time:
❑ Return MrJ Mrs.
❑ Call to Address
❑ Call from
Telephone:
Subject:
TELEPHONE RECORD
_ Project: 4v1hMt(q
i Of� /✓ice
Representing: 1110000173v
FAX:
NOTES/ SUMM&/ 4(
Z oawr ;ww JjAztdA
NEEDED FOLLOW-UP ACTION(S) BY WHOM/WHEN
1. 1.
2. 2.
3. 3.
4. 4.
5. 5.
cc:
Signed

SOC PRIORITY PROJECT: NO
If Yes, SOC No.
To: Permits and Engineering Unit
Water Quality Section
Attention: Tom Belnick
(Review Engineer)
Date: August 30, 2001
NPDES STAFF REPORT AND RECOMMENDATION
County: New Hanover
Permit No. NC0081736
PART I - GENERAL INFORMATION
1. Facility and Address:
New Hanover County
Airport Wastewater Treatment Plant
414 Chestnut Street, Rm 101
Wilmington, North Carolina 28401
2. Date of Investigation: No Visit
3. Report Prepared by: Edward Beck
4. Persons Contacted and Telephone Number:
Wyatt Blanchard, P.E. [phone]
County Engineer
5. Directions to Site: If the treatment facility is built, it is
to be located at North 23rd Street in Wilmington in the
vicinity of the airport and the City of Wilmington Northside
wastewater treatment facility.
6. Discharge Point(s), List for all discharge points:
Latitude: 34 14 29 Longitude: 77 57 11
Attach a USGS map extract and indicate treatment facility site and
discharge point on map.
U.S.G.S. Quad
No: T52
U.S.G.S.
Quad
Name: Wilmington
7. Site size and
expansion
area consistent
with
application? Yes
8. Topography (relationship to flood plain included): The
vicinity is relatively flat at approximately 25 ft msl.

9. Location of nearest dwelling: Approximately 1/4 mile
10. Receiving stream or affected.surface waters: Cape Fear River
a. Classification: Class SC
b. River Basin and Subbasin No.: 03-06-17
c. Describe receiving stream features and pertinent
downstream uses: The river is used for shipping and for
commercial and sport fishing.
PART II - DESCRIPTION OF DISCHARGE AND TREATMENT WORKS
1. a. Volume of Wastewater to be permitted: 4.0 MGD
b. What is the current permitted flow limit? 4.0 MGD
c. Actual treatment capacity of.the current facility?
Not Built
d. Date(s) and construction activities allowed by previous
Authorizations to Construct issued in the previous two
years: No ATC
e. Please provide a description of existing or substantially
constructed wastewater treatment facilities: Not Built
f. Please provide a description of proposed wastewater
treatment facilities: No plans have been submitted. An
advanced tertiary treatment system would 'be required to
meet the stringent effluent limits.
g. Possible toxic impacts to surface waters: Pretreatment
should be regulated to prevent toxic impacts.
h. Pretreatment Program (POTWs only):should be required
2. Residuals handling and utilization/disposal scheme: The
engineering proposal indicated that aerobic digestion and air
drying would be utilized to produce Class A residuals.
3. Treatment plant classification: Probably Class IV. Will be
rated upon submittal of plans and specifications.
4. SIC Code (s) : 4952
Wastewater Code(s) Primary: 01 Secondary:
Main Treatment Unit Code: 101
PART III - OTHER PERTINENT INFORMATION
1. Is this facility being constructed with Construction Grant
Funds or are any public monies (municipals only) involved? No

2. Special monitoring or limitations requests: No
Important SOC, JOC or Compliance Schedule dates: NA
4. Alternative Analysis Evaluation: Has the facility evaluated
all of the non -discharge options available? Please provide
regional perspective for each option evaluated. An
alternatives analysis has not been done. Non -discharge
options are probably not feasible since the county is small
and there few large tracts of undeveloped land remaining.
PART IV - EVALUATION AND RECOMENDATIONS
The county has taken over several smaller treatment systems
and operates an extensive and growing collection system. Most
discharging treatment systems have been eliminated by connection to
the City of Wilmington plants, which now provide treatment for most
of the wastewater collected by the county. The county obtained the
subject permit to provide expanded treatment capacity when it
appeared that negotiations with the city for cooperative expansion
of the city's plants were faltering. A proposal has now been
submitted for expansion of the northside treatment system to
accommodate the requirements of the city and county. The
application for renewal of the subject permit states that the
permit will no longer be needed when a permit is granted for
expansion of a joint city/county treatment system.
It is recommended that the permit be reissued for a period of
five years. The current policy for stringent summer NH3 effluent
limits appears to be 1 mg/l instead of 2 mg/l in the existing
permit. Since the treatment system has not been constructed, it
may be appropriate to place the more stringent limits in the
reissued permit. For instream monitoring, it may be appropriate to
state that the monitoring guidance is not applicable if this
responsibility is assumed through participation in the Lower Cape
Fear River Program.
eaaU. e&t 4 S-'- 3 ° - 0 [
Signature of Report Preparer Date
V)-� LIG- A, - A
Water Quality Regional Supervisor Date
eb: nc81736.081
cc: Wilmington Regional Office
Central Files

State of North Carolina
Department of Environment
and Natural Resources
Division of Water Quality
James B. Hunt, Jr., Governor
Bill Holman, Secretary
Kerr T. Stevens, Director
September 22, 2000
Mr. Wyatt Blanchard
New Hanover County
414 Chesnut Street
Wilmington, NC 28401
NCDENR
NORTH CAROLINA DEPARTMENT OF
ENVIRONMENT AND NATURAL RESOURCES
Subject: NPDES Permit Modification
Permit NCO081736
Airport WWTP
New Hanover County
Dear Mr. Blanchard:
The Division is beginning the cycle of permit renewals for the Cape Fear river basin. An examination of the Cape
Fear basin plan and the NPDES permit schedule has revealed that the existing expiration dates in Cape Fear NPDES
permits do not coincide with the revised permit expiration dates for the basin. This discrepancy could create unnecessary
delays in the processing of over 200 permit renewals. Accordingly, the Division is changing the permit expiration dates for
NPDES permits in the Cape Fear river basin.
This permit modification changes the expiration date of the subject permit in subbasin 30617 to November 30, 2001.
Please find enclosed the revised permit cover page. Insert the new cover page into your permit and discard the old page.
All other terms and conditions contained in the original permit remain unchanged and in full effect. This permit
modification is issued under the requirements of North Carolina General Statutes 143-215.1 and the Memorandum of
Agreement between North Carolina and the U. S. Environmental Protection Agency.
In accordance with the modification of the permit expiration date, the new due date for your renewal application is
June 3, 2001. Renewal application forms will be sent to you approximately 6-8 weeks in advance of the new due date or
you may download the forms from the NPDES web site at http://h2o.enr.state.nc.us/NPDES/documents.html. You
will need to download Standard Form A. If you have already submitted a permit renewal form, there is no need to
submit any other forms to the Division; the application will be processed during the renewal period for your subbasin.
If any part of this permit modification are unacceptable to you, you have the right to an adjudicatory hearing upon
written request within thirty (30) days following receipt of this letter. This request must be a written petition conforming
to Chapter 150B of the North Carolina General Statutes, filed with the Office of Administrative Hearings (6714 Mail
Service Center, Raleigh, North Carolina 27699-6714). Unless such demand is made, this decision shall be final=and binding.
If you have any questions concerning this permit modification, please contact Natalie Sierra at [phone],
extension 551.
Sincerely,
nc
Kerr T. Stevens
cc: Central Files
Wilmington Regional Office, Water Quality Section
Point So�,t�,ee Compliance Enforcement Unit
NPDES Un'ti
1617 Mail Service Center, Raleigh, North Carolina 27699-1617 Telephone [phone] FAX [phone]
An Equal Opportunity AffirmaliveAction Employer VISIT US ON THE INTERNET @ http://h2o.enr.state.nc.usINPDES

Permit NCO081736
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 provision of North Carolina General Statute 143-215.1, other lawful
standards and regulations promulgated and adopted by the North Carolina Environmental
Management Commission, and the Federal Water Pollution Control Act, as amended,
New Hanover County
is hereby authorized to discharge wastewater from a facility located at the
Airport WWTP
NCSR 1175
Wilmington
New Hanover 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.
This permit shall become effective October 1, 2000.
This permit and authorization to discharge shall expire at midnight on November 30, 2001.
Signed this day September 22, 2000.
Kerr T. Stevens, Krector
Division of Water Quality
By Authority of the Environmental Management Commission

NEW HANOVER COUNTY
ENGINEERING DEPARTMENT
414 CHESTNUT STREET
WILMINGTON, NORTH CAROLINA 28401-4045
TELEPHONE [phone]
WYATT E. BLANCHARD, P.E.
County Engineer
June 1, 2001
Ms. Valery Stephens
NCDENR/Water Quality/Point Sources Branch
1617 Mail Service Center
Raleigh, North Carolina 27699-1617
RE: Renewal
NPDES Permit NCO081736
Airport WWTP
New Hanover County
Dear Ms. Stephens:
On behalf of New Hanover County, I would like to request that the referenced discharge
permit be renewed.
The facility has not been constructed. Dave Goodrich asked that the County and City of
Wilmington take a more regional approach and expand the City's existing Northside WWTP.
An agreement was put in place for a regional facility. The design for expansion of a combined
County -City plant is now under way.
After receipt of a permit for expansion of the joint WWTP, the Airport WWTP permit
will be terminated.
If you have any questions feel free to contact us.
Sincerely,
Wyatt E. Blanchard, P. E.
County Engineer
New Hanover County

N. C. DEPARTMENT OF ENVIRONMENT AND NATURAL RESOURCES
Division of Water Quality - NPDES
APPLICATION FOR PERMIT TO DISCHARGE - SHORT FORM A
For municipal discharges <1 MGD (or similar privately owned discharges <1MGD)
NPDES Permit NC00 81736
Please print or type
1. Name of applicant/permittee New Hanover County
2. Address, location, and telephone number of facility producing discharge:
A.. Facility Name Airport Wastewater Treatment Plant
B. Mailing address of applicant / permittee:
1. Address
2. City 3. County
4. State 5. ZIP
6. Telephone # 7. Fax#
8. a -Mail address:
C. Physical Location of facility to be permitted:
1. Street address Not constructed
2. City, 3. County,
4. State 5. Zip Code
6. Telephone # 7. Fax#
4. Type of wastewater treatment:
❑ None ❑ Primary ❑ Intermediate ❑ Secondary @]Udvanced
5. Design flow of facility 4.0 MGD. Average monthly flow MGD
6. Percent BOD removal (actual):
❑ 0-29.9 ❑ 30-64.9 ❑ 65-84.9 ❑ 85-94.9 ❑ 95 or more
7. Population served:
❑ 1-199 ❑ 200-499 ❑ 500-999 ❑ 1,000-4,999 ❑ 5,000-9,999 ❑ 10,000 or more
S. Number of separate discharge points:
❑ 1 ❑ 2 ❑ 3 ❑ 4 or more (give number)
9. Description of wastewater volume discharged to receiving stream.
Discharge per
-operating day
Flow, MGD (million gallons per operating day)
Volume treated before
discharging (percent)
Average
Maximum
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04/20/99

N. C. DEPARTMENT OF PNVIRONMENT AND NATURAL RESOURCES
Division of Water Quality - NPDES
APPLICATION FOR PERMIT TO DISCHARGE - SHORT FORM A
10. If any wastewater, treated or untreated, is discharged to places other than surface waters, check
below as applicable. NA
Wastewater is
discharged to
Flow,
MGD million gallons er opera g da
0-0.0099
0.01-
0.049
0.05-
0.099
1 0.1-0.49
0.5-0.99
1.0-4.9
5 or
more
Deep well
Evaporation lagoon
Subsurface percolation
stem
Other, specify:
11. Is any sludge ultimately returned to a waterway?
Yes ❑ No
12. Do you receive industrial waste?
Yes ❑ No
If yes, enter approximate number of industrial dischargers into system
13. Type of collection sewer system:
A. ❑ Separate sanitary
B. 71 Combined sanitary and storm
C. Both separate and combined sewer systems
14. Name of receiving stream(s) Cape Fear River
15. Does your discharge contain (or is it possible for your discharge to contain) any of the following
substances (circle all that apply): NA
Ammonia cyanide aluminum beryllium
Lead mercury nickel copper
cadmium chromium
selenium zinc phenols
I certify that I am familiar with the information contained in the application and that to the best of my
knowledge and belief such information is true, complete, and accurate.
Wyatt E. Blanchard County Enaieer
Printed name of Person Signing Title
North Carolina General Statute 143-215.6 (b)(2) states: Any person who knowingly makes any false statement representation,
or certification in any application, record, report, plan, or other document files or required to be maintained under Article 21 or
regulations of the Environmental Management Commission implementing that Article, or who falsifies, tampers with, or k nowly
renders inaccurate any recording or monitoring device or method required to be operated or maintained under Article 21 or
regulations of the Environmental Management Commission implementing that Article, shall be guilty of a misdemeanor
punishable by a fine not to exceed $10,000, or by imprisonment not to exceed six months, or by both. (18 U.S.C. Section 1001
provides a punishment by a fine of not more than $10,000 or imprisonment not more than 5 years, or both, for a similar
offense.)
2of2
04/20/99

SLUDGE MANAGEMENT PLAN
AIRPORT WASTEWATER TREATMENT PLANT
NPDES PERMIT NC 0081736
A sludge management plan will not be prepared until the WWTP is under construction.