SW7080223_CURRENT PERMIT_20080421

STORMWATER DIVISION CODING SHEET
POST -CONSTRUCTION PERMITS
PERMIT NO.
DOC TYPE
CURRENT PERMIT
❑ APPROVED PLANS
❑ HISTORICAL FILE
❑ COMPLIANCE EVALUATION INSPECTION
DOC DATE
YYYYMMDD

WJ KQ
Michael F. Easley, Governor
William G. Ross Jr., Secretary
rNorth Carolina Department of Environment and Natural Resources
1
r Coleen H. Sullins, Director
Division of Water Quality
APRIL
Dare County Airport Authority
Attn.: George Wood
P.O BOX 429
Manteo, NC 27954
Subject: Stormwater Review SW7080223
High Density Stormwater Permit
Hangar Taxiways and Hangar -Phase II
Dare County
Dear Mr. Wood:
The Washington Regional Office received a complete Stormwater Management Permit Application for Hangar
Taxiways and Hangar -Phase II on March 5, 2008. Staff review of the plans and specifications has determined
that the project, as proposed, will comply with the Stormwater Regulations set forth in Title 15A NCAC 2H.1000.
We are forwarding Permit No. SW7080223 dated April 22, 2008, for the construction of the subject project.
This permit shall be effective from the date of issuance until April 22, 204, and shall be subject to the conditions
and limitations as specified therein. Please pay special attention to the Operation and Maintenance requirements
in this permit. Failure to establish an adequate system for operation and maintenance of the stormwater
management system will result in future compliance problems.
If any parts, requirements, or limitations contained in this permit are unacceptable, you have the right to request
an adjudicatory hearing upon written request within thirty (30) days following receipt of this permit. 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, NC 27699-6714. Unless such
demands are made this permit shall be final and binding.
If you have any questions, or need additional information concerning this matter, please contact Ernest Odei-
Larbi, or me at [phone].
incerelly,
AAIodge, Regional Supervisor
Surface Water Protection Section
Washington Regional Office
AH/eol: J:\WPDATA\WQS\ State SW-EOL\Permits — Hybrid -HD
cc: John M. Massey, P.E, (4810 Shelley Dr., Wilmington, NC 28405)
tare County Planning/Inspection
ashington Regional Office
Central Office
North Carolina Division of Water Quality Internet www ncwatercualiry org
943 Washington Square Mall Phone [phone]
Washington, NC 27889 Fax [phone]
NoorthCarofina
Naturally
An Equal Opportunity/Arfionadve Acton -Employer - 50% Recycled/10% Post Consumer Paper

State Stormwater Management Systems
Permit No. SW7080223
STATE OF NORTH CAROLINA
DEPARTMENT OF ENVIRONMENT AND NATURAL RESOURCES
DIVISION OF WATER QUALITY
STATE STORMWATER MANAGEMENT PERMIT
HIGH DENSITY DEVELOPMENT
In accordance with the provisions of Article 21 of Chapter 143, General Statutes of North Carolina as amended,
and other applicable Laws, Rules, and Regulations
PERMISSION IS HEREBY GRANTED TO
Dare County Airport Authority
Hangar Taxiways and Hangar -Phase II
Dare County
FOR THE
construction, operation and maintenance of an Infitration basin in compliance with the provisions of 15A NCAC
2H A000 (hereafter referred to as the "stormwater rules') and the approved stormwater management plans and
specifications and other supporting data as attached and on file with and approved by the Division of Water
Quality and considered a part of this permit.
This permit shall be effective from the date of issuance until April 22, 2018 and shall be subject to the following
specified conditions and limitations:
I. DESIGN STANDARDS
1. This permit is effective only with respect to the nature and volume of stormwater described in the
application and other supporting data.
2. This stormwater system has been approved for the management of stormwater runoff as described in
Section 1.6 on page 3 of this permit. The stormwater control has been designed to handle the runoff from
59,742 square feet of impervious area. This basin must be operated with a 50' vegetated filter.
3. The tract will be limited to the amount of built -upon area indicated on page 3 of this permit, and per
approved plans.
4. All stormwater collection and treatment systems must be located in either dedicated common areas or
recorded easements. The final plats for the project will be recorded showing all such required easements,
in accordance with the approved plans.
5. The runoff from all built -upon area within the permitted drainage area of this project must be directed into
the permitted stormwater control system.

State Stormwater Management Systems
Permit No. SW7080223
6. The following design criteria have been provided in the infiltration basin and must be maintained at design
condition:
a. Drainage Area, ftz : 145,428
b. Total Impervious Surfaces, fe: 83,898
C. Design Storm, inches: 1.5
d. Basin Depth, feet: 2
e. Bottom Elevation, FMSL: 5
f. Bottom Surface Area, ft2: 5000
g. Bypass Weir Elevation, FMSL: 7
h. Permitted Storage Volume, ft3: 13,336
i. Type of Soil: loose sand to medium dense sand
j. Expected Infiltration Rate, in/hr: 0.52
k. Seasonal High Water Table, FMSL: 3
I. Time to Draw Down, hours: 54
M. Receiving Stream/River Basin: Croatan Sound
n. Stream Index Number: 30-20-(2)
o. Classification of Water Body: SA
II. SCHEDULE OF COMPLIANCE
1. The stormwater management system shall be constructed in its entirety, vegetated and operational for its
intended use prior to the construction of any built -upon surface.
2. During construction, erosion shall be kept to a minimum and any eroded areas of the system will be
repaired immediately.
3. The permittee shall at all times provide the operation and maintenance necessary to assure the permitted
stormwater system functions at optimum efficiency. The -approved -Operation and Maintenance Plan must
be followed in its entirety and maintenance must occur at the scheduled intervals including, but not limited
to:
a. Semiannual scheduled inspections (every 6 months).
b. Sediment removal.
C. Mowing and revegetation of slopes and the vegetated filter.
d. Immediate repair of eroded areas.
e. Maintenance of all slopes in accordance with approved plans and specifications.
f. Debris removal and unclogging of bypass structure, infiltration media, flow spreader, catch
basins, piping and vegetated filter.
g. A clear access path to the bypass structure must be available at all times.
3

State Stormwater Management Systems
Permit No. SW7080223
4. Records of maintenance activities must be kept and made available upon request to authorized personnel
of DWQ. The records will indicate the date, activity, name of person performing the work and what
actions were taken.
5. The facilities shall be constructed as shown on the approved plans. This permit shall become voidable
unless the facilities are constructed in accordance with the conditions of this permit, the approved plans
and specifications, and other supporting data.
6. Upon completion of construction, prior to issuance of a Certificate of Occupancy, and prior to operation of
this permitted facility, a certification must be received from an appropriate designer for the system
installed certifying that the permitted facility has been installed in accordance with this permit, the
approved plans and specifications, and other supporting documentation. Any deviations from the
approved plans and specifications must be noted on the Certification. A modification may be required for
those deviations.
7. If the stormwater system was used as an Erosion Control device, it must be restored to design condition
prior to operation as a stormwater treatment device, and prior to occupancy of the facility.
8. Access to the stormwater facilities shall be maintained via appropriate easements at all times.
9. The permittee shall submit to the Director and shall have received approval for revised plans,
specifications, and calculations prior to construction, for any modification to the approved plans, including,
but not limited to, those listed below:
a. Any revision to any item shown on the approved plans, including the stormwater management
measures, built -upon area, details, etc.
b. Project name change.
C. Transfer of ownership.
d. Redesign or addition to the approved amount of built -upon area or to the drainage area.
e. Further subdivision, acquisition, lease or sale of all or part of the project area. The project area is
defined as all property owned by the permittee, for which Sedimentation and Erosion Control Plan
approval or a CAMA Major permit was sought.
f. Filling in, altering, or piping of any vegetative conveyance shown on the approved plan.
10. The permittee shall submit final site layout and grading plans for any permitted future areas shown on the
approved plans, prior to construction.
11. A copy of the approved plans and specifications shall be maintained on file by the Permittee at all times..
12. The Director may notify the permittee when the permitted site does not meet one or more of the minimum
requirements of the permit. Within the time frame specified in the notice, the permittee shall submit a
written time schedule to the Director for modifying the site to meet minimum requirements. The permittee
shall provide copies of revised plans and certification in writing to the Director that the changes have been
made.
III. GENERAL CONDITIONS
1. This permit is not transferable except after notice to and approval by the Director. In the event of a
change of ownership, or a name change, the permittee must submit a formal permit transfer request to
the Division of Water Quality, accompanied by a completed name/ownership change form, documentation
from the parties involved, and other supporting materials as may be appropriate. The approval of this
request will be considered on its merits and may or may not be approved. The permittee is responsible for
compliance with all permit conditions until such time as the Division approves the transfer request.
2. Failure to abide by the conditions and limitations contained in this permit may subject the Permittee to
enforcement action by the Division of Water Quality, in accordance with North Carolina General Statute
143-215.6A to 143-215.6C.

State Stor mwater Management Systems
Permit No. SW7080223
3. The issuance of this permit does not preclude the Permittee from complying with any and all statutes,
rules, regulations, or ordinances, which may be imposed by other government agencies (local, state, and
federal) having jurisdiction.
4. In the event that the facilities fail to perform satisfactorily, including the creation of nuisance conditions,
the Permittee shall take immediate corrective action, including those as may be required by this Division,
such as the construction of additional or replacement stormwater management systems.
5. The permittee grants DENR Staff permission to enter the property during normal business hours for the
purpose of inspecting all components of the permitted stormwater management facility.
6. The permit may be modified, revoked and reissued or terminated for cause. The filing of a request for a
permit modification, revocation and reissuance or termination does not stay any permit condition.
7. Unless specified elsewhere, permanent seeding requirements for the stormwater control must follow the
guidelines established in the North Carolina Erosion and Sediment Control Planning and Design Manual.
8. Approved plans and specifications for this project are incorporated by reference and are enforceable
parts of the permit.
9. The permittee shall notify the Division any name, ownership or mailing address changes within 30 days.
10. This permit shall be effective from the date of issuance until April 22, 2018. Application for permit renewal
shall be submitted 180 days prior to the expiration date of this permit and must be accompanied by the
processing fee.
Permit issued this the 22nd day of April 2008.
NORTH CAROLINA ENVIRONMENTAL MANAGEMENT COMMISSION
for coleen K Sull ns, Director
Division of Water Quality
By Authority of the Environmental Management Commission
Permit Number SW7080223

State Stormwater Management Systems
Permit No. SW7080223
Hangar Taxiways and Hangar -Phase H
Dare County
Designer's Certification
I, , as a duly registered in the State of North
Carolina, having been authorized to observe (periodically/ weekly/ full time) the construction of the project,
(Project)
for (Project Owner) hereby state that, to the best of my abilities, due
care and diligence was used in the observation of the project construction such that the construction was
observed to be built within substantial compliance and intent of the approved plans and specifications.
The checklist of items on page 2 of this form is included in the Certification.
Noted deviations from approved plans and specification:
SEAL
Signature
Registration Number
Date
0

State Stormwater Management Systems
Permit No. SW7080223
Certification Requirements:
_1. The drainage area to the system contains approximately the permitted acreage.
_2. The drainage area to the system contains no more than the permitted amount of built -upon area.
_3. All the built -upon area associated with the project is graded such that the runoff drains to the
system.
_4. All roof drains are located such that the runoff is directed into the system.
_5. The bypass structure weir elevation is per the approved plan.
6. The bypass structure is located per the approved plans.
_7. A Trash Rack is provided on the bypass structure.
_8. All slopes are grassed with permanent vegetation.
_9. Vegetated slopes are no steeper than 3:1.
_10. The inlets are located per the approved plans and do not cause short-circuiting of the system.
_11. The permitted amounts of surface area and/or volume have been provided.
_12. All required design depths are provided.
_13. All required parts of the system are provided.
14. The required system dimensions are provided per the approved plans.
cc: NCDENR-DWQ Regional Office
Dare County Building Inspections
7

, I „,3r
�110�63 5-a5')
�9 m DWQ USE ONLY
Date Received
Fee Paid
Permit Number
MAR
5 20H
05
�9INQ WA ,O 5W C4c - 3 o9
State of North Carolina
epartment of Environment and Natural Resources }' u 1 / ,S
Division of Water Quality
STORMWATER MANAGEMENT PERMIT APPLICATION FORM
This form nun be pliotocopied for use as an original
I. GENERAL INFORMATION
1. Applicants name (specify the name of the corporation, individual, etc. who owns the project):
Dare County Airport Authority
2. Print Owner/Signing Official's name and title (person legally responsible for facility and compliance):
George Wood, Airport Authority Chairman
3. Mailing Address for person listed in item 2 above:
City: Manteo State: NC Zip: 27954
Phone: ( 252 1 475-5570 Fax: ( 252 ) 473-1196
Email: [e-mail]
4. Project Name (subdivision, facility, or establishment name - should be consistent with project name on plans,
specifications, letters, operation and maintenance agreements, etc.):
Hangar Taxiways and Hangar--- P (, -rc (�
5. Location of Project (street address):
Dare County Regional Airport
City: Manteo County: Dare
6. Directions to project (from nearest major intersection): H 15 41, ( c!F jZA
From Manteo, NC 64-264 Turn Left on Airport Road SR 1116 rt ry�(�® tJ c i) C)
Project located at East End of Taxiwav D I
7. Latitude: 35 55' 15" Longitude: 75 41' 48" of project
8. Contact person who can answer questions about the project:
Name: George Wood Telephone Number: (252 1 475-5570
Email:georgehwood@earthlinl<.net
II. PERMIT INFORMATION:
1. Specify whether project is (check one):
®New
Form SWU-101 Version 8.07 Page 1 of
[]Renewal
2.5a �pl 5 �571
❑Modification

tv)

❑CAMA Major ®Sedimentation/Erosion Control ❑404/401 Permit ®NPDES Stormwater
Information on required state permits can be obtained by contacting the Customer Service Center at
1-877-623-6748.
III. PROJECT INFORMATION
1. In the space provided below, summarize how stormwater will be treated. Also attach a detailed narrative
(one to two pages) describing stormwater management for the project.
Stormwater runoff will sheet flow from the proopsed impervious surfaces to new grass lined drainage swales
which convey runoff to bypass structures. The bypass drainage structure will be used to direct the first 1 5" of
runoff into the new infiltration basin. Runoff in excess of the first 1.5" will overflow the baffel wall in the bypass
drainage structure and outlet into an existing grass lined drainage ditch
2. Stormwater runoff from this project drains to the Pasquotank River basin.
3. Total Site Area: 364 acres 4. Total Wetlands Area: 0 acres
5. 100' Wide Strip of Wetland Area: N/A acres (not applicable if no wetlands exist on site)
6. Total Project Area**: 2.8 acres 7. Project Built Upon Area:' . _ rJ • .;•c1%
8. How many drainage areas does the project have? 1
9. Complete the following information for each drainage area. If there are more than two drainage areas in the
project, attach an additional sheet with the information for each area provided in the same format as below.
BasinInformation =
" Draihage Aiea`1
Drainage Area 2
Receiving Stream Name
Croatan Sound
Stream Class & Index No.
SA
Drainage Area (so
145,428
Existing Impervious* Area (sf)
24,156
Proposed Impervious*Area (sf)
59,742
Impervious* Area (total)
57.7
ImerviousrSurfaceArea'=
�"` �•_
f
_
On -site Buildings (sf)
25,956'
On -site Streets (sf)
On -site Parking (sf)
On -site Sidewalks (sf)
Other on -site (so
33,786'
Off -site (sf)
Total (sf):
59,742
Impervious area is defined as the built upon area including, but not limited to, buildings, roads, parking areas,
sidewalks, gravel areas, etc.
**Total project area shall be calculated based on the current policy regarding inclusion of wetlands in the built upon area
percentage calculation.
10. How was the off -site impervious area listed above derived? See Attached exhibit (Arial Survey)
IV. DEED RESTRICTIONS AND PROTECTIVE COVENANTS
One of the following deed restrictions and protective covenants are required to be recorded for all subdivisions,
outparcels and future development prior to the sale of any lot. If lot sizes vary significantly, a table listing each lot
number, size and the allowable built -upon area for each lot must be provided as an attachment.
Form SWU-101 Version 8.07 Page 2 of 4

Bnperoious area is defined as the built upon area including, but not Innited to, buildings, roads, parking areas,
sidewalks, gravel areas, etc.
**Total project area shall be calculated based on the current polio/ regarding inclusion of wetlands in the built upon area
percentage calculation.
10. How was the off -site impervious area listed above derived? See Attached exhibit. (Arial Survey)
IV. DEED RESTRICTIONS AND PROTECTIVE COVENANTS
One of the following deed restrictions and protective covenants are required to be recorded for all subdivisions,
outparcels and future development prior to the sale of any lot. If lot sizes vary significantly, a table listing each
lot number, size and the allowable built -upon area for each lot must be provided as an attachment.
Form DRPC-1
High Density Commercial Subdivisions
Form DRPC-2
High Density Developments with Outparcels
Form DRPC-3
High Density Residential Subdivisions
Form DRPC-4
Low Density Commercial Subdivisions
Form DRPC-5
Low Density Residential Subdivisions
Form DRPC-6
Low Density Residential Subdivisions with Curb Outlets
By your signature below, you certify that the recorded deed restrictions and protective covenants for this
project shall include all the applicable items required in the above form, that the covenants will be binding
on all parties and persons claiming under them, that they will run with the land, that the required covenants
cannot be changed or deleted without concurrence from the State, and that they will be recorded prior to the
sale of any lot.
V. SUPPLEMENT FORMS
The applicable state stormwater management permit supplement form(s) listed below must be submitted for
each BMP specified for this project. Contact the Stormwater and General Permits Unit at [phone] for the
status and availability of these forms.
Form SW401-Low Density
Form SW401-Curb Outlet System
Form SW401-Off-Site System
Form SW401-Wet Detention Basin
Form SW401-Infiltration Basin
Form SW401-Infiltration Trench
Form SW401-Bioretention Cell
Form SW401-Level Spreader
Form SW401-Wetland
Form SW401-Grassed Swale
Form SW401-Sand Filter
Low Density Supplement
Curb Outlet System Supplement
Off -Site System Supplement
Wet Detention Basin Supplement
Infiltration Basin Supplement
Underground Infiltration Trench Supplement
Bioretention Cell Supplement
Level Spreader/Filter Strip/Restored Riparian Buffer Supplement
Constructed Wetland Supplement
Grassed Swale Supplement
Sand Filter Supplement
Form SWU-101 Version 8.07 Page 3 of 4

VI. SUBMITTAL REQUIREMENTS
Only complete application packages will be accepted and reviewed by the Division of Water Quality (DWQ).
A complete package includes all of the items listed below. The complete application package should be
submitted to the appropriate DWQ Office. (Appropriate office may be found by locating project on the
interactive online map at http://h2o.enr.state.nc.us/su/msi maos.htm)
1. Please indicate that you have provided the following required information by initialing in the space provided
next to each item.
Initials
• Original and one copy of the Stormwater Management Permit Application Form
• Original and one copy of the Deed Restrictions & Protective Covenants Form
• Original of the applicable Supplement Form(s) and O&M agreement(s) for each BMP
• Permit application processing fee of $505 ($4,000 for Express) payable to NCDENR
• Calculations & detailed narrative description of stormwater treatment/management
• Copy of any applicable soil report
• Three copies of plans and specifications (sealed, signed & dated), including.
- Development/Project name
- Engineer and firm
-Legend
- North arrow
- Scale
- Revision number & date
- Mean high water line
- Dimensioned property/project boundary
- Location map with named streets or NCSR numbers
- Original contours, proposed contours, spot elevations, finished floor elevations
- Details of roads, drainage features, collection systems, and stormwater control measures
- Wetlands delineated, or a note on plans that none exist
- Existing drainage (including off -site), drainage easements, pipe sizes, runoff calculations
- Drainage areas delineated
- Vegetated buffers (where required)
VII. AGENT AUTHORIZATION
If you wish to designate authority to another individual or firm so that they may provide information on your
behalf, please complete this section.
Designated agent (individual or firm):
Mailing Address:
City: State: Zip:
Phone: { ) Fax: ( )
Email:
VIII. APPLICANT'S CERTIFICATION
I, (print or hjpe name of person listed in General Information, item 2) GeorQe Wood
certify that the information included on this permit application form is, to the best of my knowledge, correct and
that the project will be constructed in conformance with the approved plans, that the required deed restrictions
and protective covenants will be recorded, and that the proposed project complies with the requirements of 15A
NCAC 2H .1000. ,
Date:
Form SWU-101 Version 8.07 Page 4 of 4

o� SWyd�oaa3
FINANCIAL RESPONSIBILITY/OWNERSHIP FORM
SEDIMENTATION POLLUTION CONTROL ACT
No person may initiate any land -disturbing activity on one or more acres as covered by the Act before this form
and an acceptable erosion and sedimentation control plan have been completed and approved by the Land
Quality Section, N.0 Department of Environment and Natural Resources (Please type or print and, if the
question is not applicable or the e-mail and/or fax information unavailable, place N/A in the blank.)
Part A.
1. Project Name Hangar Taxiways and Hangar
2. Location of land -disturbing activity. County Dare City or Township Manteo
Highway/Street State Road 1116 Latitude 35055' 15" Longitude 75° 41' 48"
3. Approximate date land -disturbing activity will commence: March 24, 2008
4. Purpose of development (residential, commercial, industrial, institutional, etc.): Airport
5. Total acreage disturbed or uncovered (including off -site borrow and waste areas): 3 Acres
6. Amount of fee enclosed: $ 19500 . The application fee of $65.00 per acre (rounded up
to the next acre) is assessed without a ceiling amount (Example: a 9-acre application fee is $450).
7. Has an erosion and sediment control plan been filed? Yes X No Enclosed X
8. Person to contact should erosion and sediment control issues arise during land -disturbing activity:
Name George Wood E-mail Address georgehwoodtgearthlink.net
Telephone [phone] Cell #
Fax # [phone]
9. Landowner(s) of Record (attach accompanied page to list additional owners):
Dare County Regional Airport [phone] [phone]
Name Telephone Fax Number
PO Box 429 410 Airport Road
Current Mailing Address Current Street Address
Manteo NC 27954 Manteo NC 27954
City State Zip City State Zip
10. Deed Book No. 178 Page No. 74 Provide a copy of the most current deed.
Part B.
Person(s) or firm(s) who are financially responsible for the land-disturbin���� ✓J
comprehensive list of all responsible parties on an attached sheet):
Dare County Regional Airport georgehwoodpearthlink. net n'-o c) 1 ?no>
Name E-mail Address
PO Box 429 410 Airport Road LAND QUALITY
G SECTIOONAL OFF
Current Mailing Address Current Street Address
Manteo NC 27954 Manteo NC 27954
City State Zip City State Zip
Telephone [phone] Fax Number_ [phone]
L4DR

2. (a) If the Financially Responsible Party is not a resident of North Carolina, give name and street address of
the designated North Carolina Agent:
Name
Current Mailing Address
City
Telephone
State Zip
E-mail Address
Current Street Address
City State Zip
Fax
(b) If the Financially Responsible Party is a Partnership or other person engaging in business under an
assumed name, attach a copy of the Certificate of Assumed Name. If the Financially Responsible Party is
a Corporation, give name and street address of the Registered Agent:
Name of Registered Agent E-mail Address
Current Mailing Address
City
Current Street Address
State Zip City
Fax N
State
The above information is true and correct to the best of my knowledge and belief and was provided by
me under oath (This form must be signed by the Financially Responsible Person if an individual or his
attorney -in -fact, or if not an individual, by an officer, director, partner, or registered agent with the
authority to execute instruments for the Financially Responsible Person). I agree to provide corrected
information should there be any change in the information provided herein.
George Wood Dare County Airport Authority Chairman
Type or rent name Title or Authority
,�//�� ���iu8
Sig ture Dat
----------------------------------------------------------------------------------------------------------------------------------
I, Cc\r btw 1 5kdwe l 1 a Notary Public of the County of _DR R.E
State of North Carolina, hereby certify that ()e rctc 1:4. UI)ooJ appeared
personally before me this day and being duly sworn acknowledged that the above form was executed
by him.
Witness mvfidrid,an,d notarial seal, this \4 day of FetortkQ Y�j 20 QY
Notary
S.eal,,- ,
My commission expires

i
Permit Number: S W'7 68oa.P.3
(to be provided by DfVQ)
Drainage Area Number:
Infiltration Basin Inspection and Maintenance Agreement
I will keep a maintenance record on this BMP. This maintenance record will be kepagc VED
log in a known set location. Any deficient BMP elements noted in the inspection will be r
corrected, repaired or replaced immediately. These deficiencies can affect the integrityAR 5 2008
of structures, safety of the public, and the removal efficiency of the BMP.
Important maintenance procedures:
— The drainage area will be carefully managed to reduce the sediment load to the
infiltration basin.
— Immediately after the infiltration basin is established, the vegetation will be
watered twice weekly if needed until the plants become established (commonly
six weeks).
— No portion of the infiltration basin will be fertilized after the initial fertilization
that is required to establish the vegetation.
— The vegetation in and around the basin will be maintained at a height of
approximately six inches.
After the infiltration basin is established, it will be inspected once a quarter and within
24 hours after every storm event greater than 1.0 inches (or 1.5 inches if in a Coastal
County). Records of inspection and maintenance will be kept in a known set location
and will be available upon request.
Inspection activities shall be performed as follows. Any problems that are found shall
be repaired immediately.
BMP element:
Potential problem
How I will remediate theproblem:
The entire BMP
Trash/debris is present.
Remove the trash debris.
The perimeter of the
Arens of bare soil and/or
Regrade the soil if necessary to
infiltration basin
erosive gullies have formed.
remove the gully, and then plant a
ground cover and water until it is
established. Provide lime and a
one-time fertilizer application.
The inlet device: pipe or
The pipe is clogged (if
Unclog the pipe. Dispose of the
Swale
applicable).
sediment off -site.
The pipe is cracked or
Replace the pipe.
otherwise damaged (if
applicable).
Erosion is occurring in the
Regrade the swale if necessary to
swate (if applicable).
smooth it over and provide erosion
control devices such as reinforced
turf matting or riprap to avoid
future problems with erosion.
Form SW401-Infiltration Basin I&M-Rev.2
Page I of 3

`e
BMP element:
Potentialproblem:
How I will remediate theproblem:
The forebay
Sediment has accumulated
Search for the source of the
and reduced the depth to 75%
sediment and remedy the problem if
of the original design depth.
possible. Remove the sediment and
dispose of it in a location where it
will not cause impacts to streams or
the BMP.
Erosion has occurred or
Provide additional erosion
riprap is displaced.
protection such as reinforced turf
malting or riprap if needed to
prevent future erosion problems.
Weeds are present.
Remove the weeds, preferably by
hand. If pesticides are used, wipe
them on the plants rather than
spraying.
The main treatment area
A visible layer of sediment
Search for the source of the
has accumulated.
sediment and remedy the problem if
possible. Remove the sediment and
dispose of it in a location where it
will not cause impacts to streams or
the BMP. Replace any media that
was removed in the process.
Revegetate disturbed areas
immediately.
Water is standing more than
Replace the top few inches of filter
5 days after a storm event.
media and see if this corrects the
standing water problem. If so,
revegetate immediately. If not,
consult an appropriate professional
for a more extensive repair.
Weeds and noxious plants are
Remove the plants by hand or by
growing in the main
wiping them with pesticide (do not
treatment area.
spray).
The embankment
Shrubs or trees have started
Remove shrubs or trees
to grow on the embankment.
immediately.
An annual inspection by an
Make all needed repairs.
appropriate professional
shows that the embankment
needs repair.
The outlet device
Clogging has occurred.
Clean out the outlet device. Dispose
of the sediment off -site.
The outlet device is damaged
Repair or replace the outlet device.
The receiving water
Erosion or other signs of
Contact the NC Division of Water
damage have occurred at the
Quality 401 Oversight Unit at 919-
outlet.
733-1786.
Form SW401-Infiltration Basin I&M-Rev.2
Page 2 of 3

Permit
(to be provided by DWQ)
I acknowledge and agree by my signature below that I am responsible for the
performance of the maintenance procedures listed above. I agree to notify DWQ of any
problems with the system or prior to any changes to the system or responsible parry.
Project name: Hangar Taxiways and Hangar
BMP drainage area number: 1
Print
Title: Dare County AiMort Authority Chairman
Address: 410 Airport Road, Manteo, NC 27954
Note: The legally responsible party should not be a homeowners association unless more than 50% of
the lots have been sold and a resident of the subdivision has been named the president.
I, l , .,A.Qw S «QWF I ( , a Notary Public for the State of
Pik GarOG V'a County of 0cirt do hereby certify that
%Qd {e wood personally appeared before me this a-7
day of CL(7rttn ry a0f* , and acknowledge the due execution of the
forgoing infiltration basin maintenance requirements. Witness my hand and official seal,
SEAL
My commission expires YYk2 l(o , 'AO la
@but SW401-Infiltration Basin I&M-Rev.2
Page 3 of 3