SW7100310_CURRENT PERMIT_20100520

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

CJA
NCDENR
North Carolina Department of Environment and
Division of Water Quality
Beverly Eaves Perdue Coleen H. Sullins
Governor Director
May 20, 2010
Washington County
Attn: Mr. David Peoples
PO Box 1007
Plymouth, NC 27962
W12 I\
Natural Resources
Dee Freeman
Subject: Stormwater Permit No. SW7100310
Plymouth Municipal Airport
T-Hanger Area Development
High Density Stormwater Project
Washington County
Dear Mr. Peoples:
The Washington Regional Office received a completed stormwater permit
application for the subject project on March 24, 2010. 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 21-1.1000. We are
forwarding Permit No. SW7100310 dated May 20, 2010 for the subject project.
1 -;7.13 112-1
This permit shall be effective from the date of issuance until May 20, 2020, 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
and in the submitted application. 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 150E of the North
Carolina General Statutes, and filed with the Office of Administrative Hearings,
P.O. Drawer 27447, Raleigh, NC 27611-7447. Unless such demands are made
this permit shall be final and binding.
North Carolina Division of Water Quality Internet: www.newaterquali .or
943 Washington Square Mall Phone: [phone]
Washington, NC 27889 FAX [phone]
An Equal Opportunity/Affirmative Action Employer — 50% Recycled110 % Post Consumer Paper
NorthCarolina
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Page 2 of 9
Washington County
May 20, 2010
Page Two
If you have any questions, or need additional information concerning this matter,
please contact either Bill Moore, or me at [phone].
Si cerely,
AI odgey
Regional Supervisor
Surface Water Protection Section
cc: The LPA Group of North Carolina
Washington County Planning/Inspections
LAVashington Regional Office
Central Files

Page 3 of 9
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
County of Washington
Plymouth Municipal Airport
Washington County
FOR THE
construction, operation and maintenance of a wet detention basin in compliance
with the provisions of 15A NCAC 2H .1000 (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 for
the Plymouth Municipal Airport located near Plymouth, NC.
This permit shall be effective from the date of issuance until May 20, 2020 and
shall be subject to the following specified conditions and limitations:
I. DESIGN STANDARDS
This permit is effective only with respect to the nature and volume of
stormwater described in the application and other supporting data.
This stormwater system has been approved for the management of
stormwater runoff as described in Section 1.6 on page 4 of this permit. The
stormwater controls have been designed to handle the runoff from 2.51
acres of impervious area.
3. 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 and permit.

Page 4 of 9
CI
R
The tract will be limited to the amount of built -upon area indicated on page
4 of this permit, and per approved plans.
The runoff from all built -upon area within the permitted drainage areas of
this project must be directed into the permitted stormwater control system.
The following design criteria have been provided for the infiltration basins
and must be maintained at design condition:
a.
Total Site Area for Airport:
345 acres
(Drainage area for T-Hanger Project)
5.07 acres
b.
Total Impervious Surfaces:
2.51 acres
C.
Design Storm:
1.5 - inch
d.
Basin Depth:
3.0 ft
e.
TSS removal efficiency:
90 %
f.
Permanent Pool Surface Area Required:
12,378 sf
g.
Permanent Pool Surface Area Provided:
20,018 sf
h.
Storage Volume Required:
10,249 cf
i.
Storage Volume Provided:
20,284 cf
j.
Permanent Pool Storage Elevation, FMSL:
30.4 ft
k.
Small Diameter Controlling Orifice:
2.0-inch
I.
Receiving Stream/River Basin:
UT-Conaby Creek
M.
Classification of Water Body:
C-sw
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 Plans
must be followed in its entirety and maintenance must occur at the
scheduled intervals including, but not limited to:

Page 5 of 9
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, filter media,
flow spreader, catch basins, piping and vegetated filter.
g. A clear access path to the bypass structure must be available at all
times.
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.
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.
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.

Page 6 of 9
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.
13. This permit shall be effective from the date of issuance until May 20, 2020.
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.
III. GENERAL CONDITIONS
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.
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.

Page 7 of 9
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. A copy of the approved
plans and specifications shall be maintained on file by the Permittee for
the life of the project.
9. The permittee shall notify the Division of any name, ownership or mailing
address changes within 30 days.
Permit issued this the 20 th day of May, 2010.
IT COMMISSION
for
Division of Water Quality
By Authority of the Environmental Management Commission
Permit Number SW7100310

Page 8 of 9
Stormwater Permit No. SW7100310
Plymouth Municipal Airport
T-Hanger Area Development
Wet Detention Pond System
Washington 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.
Note: The checklist on the following page must be included with this
Certification. Any changes or deviations from the approved plans and
specifications must be explained in detail, and may require a permit modification.
The certification forms should be submitted to the Division of Water Quality at the
appropriate Regional office.
SEAL
Signature
Registration Number
Date

Page 9 of 9
Complete this checklist for each system and include with
Certification:
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 elevations are per the approved plan.
6. The bypass structure is located per the approved plans.
7. A Trash Rack is provided on the outlet/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.

- DWQUSE ONLY
Date Received
Fee Paid
Permit Number
()
S
Applicable Rules: ❑ Coastal SW -1995 ❑ Coastal SW - 2008 ❑ Ph 11 - Post Construction
(select all that apply) ❑ Non -Coastal SW- FIQW/ORW Waters ❑ Universal Stormwater Management Plan
❑ Other WQ M mt Plan: S 'AC V, 3 &5
State of North Carolina Yg T�F
CF s
Department of Environment and Natural Resources
Division of Water Quality MAR 2 4 2010
STORMWATER MANAGEMENT PERMIT APPLICATION FORM
77tis form niay be photocopied for use as an original ( a,�N- R.J
I. GENERAL INFORMATION
1. Project Name (subdivision, facility, or establishment name - should be consistent -with project name on plans,
specifications, letters, operation and maintenance agreements, etc.): LD
i
Plymouth Municipal Airport - T-Han ar Area Development �/� e S -7 �V
2. Location of Project (street address):
1069 Plymouth Airport Road
City:Plymouth County: Washington Zip:27962
3. Directions to project (from nearest major intersection):
Take US 64 west from Plymouth. Turn left onto Long Ridge Road. Turn left onto Morrattock Road.
Turn right onto Plymouth Airport Road.
4. Latitude:35° 48' 33.62" N Longitude:76° 45' 46.37" W of the main entrance to the project.
II. PERMIT INFORMATION:
1. a. Specify whether project is (check one): ®New ❑Modification
b. If this application is being submitted as the result of a modification to an existing permit, list the existing
permit numberN/A , its issue date (if known)N/A , and the status of
construction: ❑Not Started []Partially Completed* ❑ Completed* *provide a designer's certification
2. Specify the type of project (check one):
❑Low Density ®High Density ❑Drains to an Offsite Stormwater System ❑Other
3. If this application is being submitted as the result of a previously returned application or a letter from DWQ
requesting a state Stormwater management permit application, list the stormwater project number, if
assigned, N/A and the previous name of the project, if different than currently
proposed, N/A
4. a. Additional Project Requirements (check applicable blanks; information on required state permits can be
obtained by contacting the Customer Service Center at 1-877-623-6748):
❑LAMA Major ®Sedimentation/Erosion Control:11 ac of Disturbed Area
❑NPDES Industrial Stormwater E404/401 Permit: Proposed Impacts 0.09 Ac Wetlands/45 LF Stream
b.If any of these permits have already been acquired please provide the Project Name, project/Permit Number,
issue date and the type of each permit:N/A
Form SWU-101 Version 07Ju1y2009 Page I of

III. CONTACT INFORMATION
1. a. Print Applicant / Signing Official's name and title (specifically the developer, property owner, lessee,
designated government official, individual, etc. who owns the project):
Applicant/ Organization:Washington County
Signing Official & Title:Mr. David Peoples, County Manager
b. Contact information for person listed in item la above:
Street Address:116 Adams Street
City:Plymouth State:NC Zip:27962
Mailing Address (if applicable): P.O. Box 1007
City:Plymouth State:NC Zip:27962
Phone: [phone] Fax: [phone]
Email: [e-mail]
washconc.org
c. Please check the appropriate box. The applicant listed above is:
® The property owner (Skip to Contact Information, item 3a)
❑ Lessee* (Attach a copy of the lease agreement and complete Contact Information, item 2a and 2b below)
❑ Purchaser* (Attach a copy of the pending sales agreement and complete Contact Information, item 2a and
2b below)
❑ Developer* (Complete Contact Information, item 2a and 2b below.)
2. a. Print Property Owner's name and title below, if you are the lessee, purchaser or developer. (This is the
person who owns the property that the project is located on):
Property Owner/Organization:
Signing Official & Title:
b. Contact information for person listed in item 2a above:
Street Address:
City: State: Zip:
Mailing Address (if applicable):
City: State: Zip:
Phone: ( ) Fax: ( )
a. (Optional) Print the name and title of another contact such as the project's construction supervisor or other
person who can answer questions about the project:
Other Contact Person/Organization.:The LPA Group of North Carolina p.a.
Signing Official & Titleaason Elliott, Aviation Design i Engineer
b.Contact information for person listed in item 3a above:
Mailing Address:5000 Falls of Neuse Road, Suite 304
City:Raleigh State:NC Zip:27609
Phone: (919 ) 954-1244
Email:[e-mail]
Fax: (919 ) 954-1345
4. Local jurisdiction for building pen nits: Washington County
Point of Contact Wayne Lilley, Building Inspector Phone #: (252 ) 793-4114
Form SWU-101 Version 071u1y2009 Page 2 of

IV. PROJECT INFORMATION
1. In the space provided below, briefly summarize how the stormwater runoff will be treated.
Runoff from this proiect will be treated using a wet detention pond. The pond has been designed for the
removal of 90 % TSS The runoff will reach the pond through a system of pipes and ditches. In addition, the
ditch downstream from the pond, will be re -graded with a 5' bottom, 5:1 side slopes, and a 0.2% long. slope.
2. a. If claiming vested rights, identify the supporting documents provided and the date they were approved:
❑ Approval of a Site Specific Development Plan or PUD Approval Date:
❑ Valid Building Permit Issued Date:
❑ Other: Date:
b.Identify the regulation(s) the project has been designed in accordance with:
® Coastal SW -1995 ❑ Ph 11 - Post Construction
3. Stormwater runoff from this project drains to the Roanoke River basin.
4. Total Property Area: 345 acres
5. Total Coastal Wetlands Area: 1 acres
6. Total Surface Water Area: 3 acres
7. Total Property Area (4) - Total Coastal Wetlands Area (5) - Total Surface Water Area (6) = Total Project
Area+:341 acres
Total project area shall be calculated to exclude the followin the normal pool of impounded structures, the area
between the banks of streans and rivers, the area below the Unnal High Water (NHW) line or Mean High Water
(MHW) line, and coastal wetlands landward from the NHW (or MHM line. The resultant project area is used to
calculate overall percent built upon area (BUA). Non -coastal wetlands landward of the NHW (or MHW) line may
be included in the total project area.
8. Project percent of impervious area: (Total Impervious Area / Total Project Area) X 100 =
9. How many drainage areas does the project have? 3 (For high density, count 1 for each proposed engineered
stormwater BMP. For low density and other projects, use 1 for the whole property area)
10. Complete the following information for each drainage area identified in Project Information item 9. If there
are more than four drainage areas in the project, attach an additional sheet with the information for each area
provided in the same format as below.
Basin Information
Drainage Area 1
' Draina e Area 2'
Draina ge Area 3
Drain e Area 4
Receiving Stream Name
Trib. of Conaby
Creek
Trib. of Conaby
Creek
Trib. of Conaby
Creek
Stream Class
C; Sw
C; Sw
C; Sw
Stream Index Number *
23-56
23-56
23-56
Total Drainage Area (so
220,661 .SSo
7 213,038
21.3,754
On -site Drainage Area (sf)
219,176
213,038
213,754
Off -site Drainage Area (sf)
1 1,485
0
0
Proposed Impervious Area** (so
109,346 ;k.ill
20,716
20,551
% Impervious Area** total
49% ✓
1 10%
10%
Irri ervious{" Surface Area
Draina ge Area 1
Draina e Arca.2
, Draina >e Area'3
Draina e Area
On -site Buildings/Lots (so
18,883
0
3,740
On -site Streets (so
3,260
0
0
On -site Parking (so
0
0
0
On -site Sidewalks (so
0
0
0
Other on -site (so
20,967
9255
9,158
Future (so
58,045
0
0
Off -site (sf)
538
0
0
Existing BUA*** (so
7,653
11,461
7,653
Total (sf):
109,346
20,716
20,551.
Stream Class and Index Number can be determined at: httn:/Ri2o.enr.state.nc.us/birus/reports/reportsWB.lttnil
Impervious area is defined as the built upon area including, but not limited to, buildings, roads, parking areas,
sidewalks, gravel areas, etc.
Fonn SWU-101 Version 07July2009 Page 3 of 6

'Report only that amount of existing BUA that will remain after development. Do not report any existing BUA that
is to be removed and which will be replaced by new BUA.
11. How was the off -site impervious area listed above determined? Provide documentation. The very small
amount of off -site impervious listed above is from the access drive and is shown on the plans.
Projects in Union Count-,,: Contact DWQ Central OfJice staff to check ifthe project is located within a Threatened &
rndangered Species watershed that may be subject to more stringent stornnvater requirentemr as per NCAC 02B .0600.
V. SUPPLEMENT AND O&M FORMS
The applicable state stormwater management permit supplement and operation and maintenance (O&M) forms
must be submitted for each BMP specified for this project. The latest versions of the forms can be downloaded
fromhttp://h2o.enr.state.nc.us/su/bap forms.htm.
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. A detailed application instruction sheet and BMP
checklists are available from httl2://l12o.enr.state.nc.us/su/bmp forms.htm. The complete application
package should be submitted to the appropriate DWQ Office. (The appropriate office may be found by locating
project on the interactive online map at http://h2o.enr.state.nc.us/su/msi maps.htm.)
Please indicate that the following required information have been provided by initialing in the space provided for
each item. All original documents MUST be signed and initialed in blue ink. Download the latest versions for
each submitted application package from http://h2o.enr.state.nc.us/su/bmp forms.htm.
Initials
1. Original and one copy of the Stormwater Management Permit Application Form.
2. Original and one copy of the signed and notarized Deed Restrictions & Protective Covenants
Form. (if required as per Part VII below)
3. Original of the applicable Supplement Form(s) (sealed, signed and dated) and O&M
agreement(s) for each BMP.
4. Permit application processing fee of $505 payable to NCDENR. (For an Express review, refer to
httl2://www.envheII2.org/pages/onestopexpress.htmi for information on the Express program
and the associated fees. Contact the appropriate regional office Express Permit Coordinator for
additional information and to schedule the required application meeting.)
5. A detailed narrative (one to two pages) describing the stormwater treatment/management for
the project. This is required in addition to the brief summary provided in the Project
Information, item 1.
6. A USES map identifying the site location. If the receiving stream is reported as class SA or the
receiving stream drains to class SA waters within 1/2 mile of the site boundary, include the Vz
mile radius on the map.
7. Sealed, signed and dated calculations.
8. 'Two sets of plans folded to 8.5" x 14" (scaled, signed, & dated), including:
a. Development/Project name.
b. Engineer and firm.
c. Location map with named streets and NCSR numbers.
d. Legend.
e. North arrow.
f. Scale.
g. Revision number and dates.
h. Identify all surface waters on the plans by delineating the normal pool elevation of
impounded structures, the banks of streams and rivers, the MHW or NHW line of tidal
waters, and any coastal wetlands landward of the MHW or NHW lines.
• Delineate the vegetated buffer landward from the normal pool elevation of impounded
structures, the banks of streams or rivers, and the MHW (or NHW) of tidal waters.
i. Dimensioned property/project boundary with hearings & distances.
j. Site Layout with all BUA identified and dimensioned.
k. Existing contours, proposed contours, spot elevations, finished floor elevations.
1. Details of roads, drainage features, collection systems, and stormwater control measures.
m. Wetlands delineated, or a note on the plans that none exist. (Must be delineated by a
qualified person. Provide documentation of qualifications and identify the person who
made the determination on the plans.
n. Existing drainage (including off -site), drainage easements, pipe sizes, runoff calculations.
Form SW U-101 Version 07July2009 Page 4 of 6

o. Drainage areas delineated (included in the main set of plans, not as a separate document).
p. Vegetated buffers (where required).
9. Copy of any applicable soils report with the associated SI-IWT elevations (Please identify _
elevations in addition to depths) as well as a map of the boring locations with the existing
elevations and boring logs. Include an 8.5"xll" copy of the NRCS County Soils map with the
project area clearly delineated. For projects with infiltration BMPs, the report should also
include the soil type, expected infiltration rate, and the method of determining the infiltration rate.
(Infiltration Devices submitted to WiRO: Schedule a site visit far DWQ to verify the SFIWT prior
to submittal, [phone].)
10. A copy of the most current property deed. Deed book: Page No: _
11. For corporations and limited liability corporations (LLC): Provide documentation from the NC
Secretary of State or other official documentation, which supports the titles and positions held
by the persons listed in Contact Information, item la, 2a, and/or 3a per NCAC 21-1.1003(e). The
corporation or LLC must be listed as an active corporation in good standing with the NC
Secretary of State, otherwise the application will be returned.
httR://www.secretary.state.nc.us/Corporations/`­CSearch.aspx
VII. DEED RESTRICTIONS AND PROTECTIVE COVENANTS
For all subdivisions, outparcels, and future development, the appropriate property restrictions and protective
covenants are required to be recorded prior to the sale of any lot. If lot sizes vary significantly or the proposed
BUA allocations vary, a table listing each lot number, lot size, and the allowable built -upon area must be provided
as an attachment to the completed and notarized deed restriction form. The appropriate deed restrictions and
protective covenants forms can be downloaded from
htto://h2o.enr.state.nc.us/su/bmp forms.htm@deed restrictions. Download the latest versions for each submittal.
In the instances where the applicant is different than the property owner, it is the responsibility of the property
owner to sign the deed restrictions and protective covenants form while the applicant is responsible for ensuring
that the deed restrictions are recorded.
By the notarized signature(s) below, the permit holder(s) certify that the recorded property restrictions and
protective covenants for this project, if required, shall include all the items required in the permit and listed
on the forms available on the website, 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 NC DWQ and that they will be recorded prior to the sale of any lot.
VIII. CONSULTANT INFORMATION AND AUTHORIZATION
Applicant: Complete this section if you wish to designate authority to another individual and/or firm (such as a
consulting engineer and/or firm) so that they may provide information on your behalf for this project (such as
addressing requests for additional information).
Consulting Engineer: Jason L. Elliott P.E.
Consulting Firm: The LPA Group of North Carolina p.a.
Mailing Address:5000 Falls of Neuse Road, Suite 304
City:Raleigh State:NC Zip:27614
Phone: (919 ) 954-1244
Email:ilelliottOlpa,group.com
Fax: (919 ) 954-1345
IX. PROPERTY OWNER AUTHORIZATION (if Contact Information, item 2 has been filled out, complete this
section)
I, (print or type name of person listed in Contact Information, item 2a) certify that I
own the property identified in this permit application, and thus give permission to (print or type name ofperson
listed in Contact Information, item 1a) with (print or type name oforganization listed in
Contact Information, item lb) to develop the project as currently proposed. A copy of
the lease agreement or pending property sales contract has been provided with the submittal, which indicates the
party responsible for the operation and maintenance of the stormwater system.
Form SWU-101 Version 07July2009 Page 5 of 6

As the legal property owner I acknowledge, understand, and agree by my signature below, that if my designated
agent (entity listed in Contact Information, item 1) dissolves their company and/or cancels or defaults on their
lease agreement, or pending sale, responsibility for compliance with the DWQ Stormwater permit reverts back to
me, the property owner. As the property owner, it is my responsibility to notify DWQ immediately and submit a
completed Name/Ownership Change Form within 30 days; otherwise I will be operating a stormwater treatment
facility without a valid permit. I understand that the operation of a stormwater treatment facility without a valid
permit is a violation of NC General Statue 143-215.1 and may result in appropriate enforcement action including
the assessment of civil penalties of up to $25,000 per day, pursuant to NCGS 143-215.6.
Signature: Date:
I, a Notary Public for the State of County of
do hereby certify that personally appeared
before me this _ day of and acknowledge the due execution of the application for
a stormwater permit. Witness my hand and official seal,
SEAL
My commission
X. APPLICANT'S CERTIFICATION
I, (print or type mmne of person listed in Contact Information, item 2) j0Qu PV) Z •
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 the
applicable stormwater rules under 1.5A NCAC 2H .1000, SL 2006-246 (Ph. 11 - Post Construction) or SL 2008-211.
J1
Date: 313 /'o
a Notary Public for the State of A./0: LG(r0I IAbCounty of
1A%QjhtA147�2AZ do hereby certify that J)OV;d Pewles personally appeared
before me this day of Mar ZO )� "and acowledge the due exec�tion of the application for
n ex If
a stormwater permit. Witness my hand and official seal,
SEAL
My commission expires I a bo lao1 �
Form SWU-101 Version 073uly2009 Page 6 of 6

�LCCC/IV/t.l.r�J 4-�-to 1 �iLA
FINANCIAL LIIOWNEIRSHI
SEDIMENTATION POLLUTION CO TROL ACTM (COPY
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.C. 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 upavailable, place N/A in the blank.)((ri f i /if
Part A.�(�!� SEP 2 2U10
1. Project Name Plymouth Municipal Airport — T-Hangar Taxilanes / /
2. Location of land -disturbing activity: County Washington City or Township Plymouth
Highway/Street Plymouth Airport Rd. Latitude 35048' 40.95" (35.810) Longitude 76° 45' 40.27" (76.760)
3. Approximate date land -disturbing activity will commence: November 2010
4. Purpose of development (residential, commercial, industrial, institutional, etc.): Airport / Commercial
5. Total acreage disturbed or uncovered (including off -site borrow and waste areas): 13 Acres
6. Amount of fee enclosed: $ 845.00 . 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 $585).
7. Has an erosion and sediment control plan been filed? Yes No X Enclosed Yes
8. Person to contact should erosion and sediment control issues arise during land -disturbing activity:
Name Jason Elliott, PE — LPA Group of NC E-mail Address ilelliott((Dlpagroup.com
Telephone [phone] Cell #
Fax # [phone]
9. Landowner(s) of Record (attach accompanied page to list additional owners):
Washington County
Name
P.O. Box 1007
Current Mailing Address
Plymouth NC 27962
City State Zip
[phone] [phone]
Telephone Fax Number
116 Adams Street
Current Street Address
Plymouth NC 27962
City State Zip
10. Deed Book No. 461 Page No. 54 Provide a copy of the most current deed.
Part B.
Person(s) or firm(s) who are financially responsible for the land -disturbing activity (Provide a
comprehensive list of all responsible parties on an attached sheet):
Washington County
Name
P.O. Box 1007
Current Mailing Address
Mr. David Peoples c r
E-mail Address e
116 Adams Street
Current Street Address 0 1 �i�
Plymouth NC 27962 Plymouth WDQUAL"SECTIUN27962
City State Zip City 'EItNW UIN ilt:LAL)H­lGEp
Telephone [phone] Fax Number [phone]

(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 State
Address
Current Street Address
City State Zip
Fax Number
(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
Current Mailing Address
City
State Zip
E-mail Address
Current Street Address
City State Zip
Fax Number
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.
David Peoples
Type or print name
Signature
County Manager
Title or Authority
Date
a
I, jo Zn W Grout, L alNotary
-IPublic of the
Countyof i T A)
State of North Carolina, hereby certify that i�//,�t/fG/ L- &Fki`appeared
personally before me this day and being duly sworn acknowledged that the above form was
executed by him.
Witness my hand and notarial seal, this j _3_day of ✓ t 20/_
to �eVli
No
Seal '
My commission expires 2 /

n
' Permit No.
(to be pmvHed by DWO)
11'11 �W �.-
MAR 2 4 2010
e.�� OF W A TF9
w T � .e o��/J'�'j��r�/\���o1y
NCDENR -
STORMWATER MANAGEMENT PERMIT APPLICATION FORM
401 CERTIFICATION APPLICATION FORM
WET DETENTION BASIN SUPPLEMENT
This form must be filled out, printed and submitted.
The Required Items Checklist (Pad III) must be printed, filled out and submitted along with all of the required information.
0PROJECT/ INFORMATION
Project name Plymouth Municipal Airport - T-Hangar Area Development
Contact person Jason Elliot, The LPA Group of North Carolina, p.a.
Phone number ,[phone]
Date i23-Feb.10 :..
Drainage area number f
Site Characteristics
I
Drainage area
221,031;ft2
Jar
Impervious area, post -development
109,346'11e
2 s(
%impervious
49.47
Design rainfall depth
L9 in
Storage Volume: Non -SA Waters
Minimum volume required
20,284'tt°
OK
Volume provided
20,465 ffa
OK, volume provided is equal to or in excess of volume required.
Storage Volume: SA Waters
1.5" runoff volume
Pre -development 1-yr, 24-hr runoff
Post -development 1-yr, 24-hr runoff
Minimum volume required
Volume provided
Peak Flow Calculations
Is the pre/post central of the 1yr 24hr storm peak flow required?
1-yr, 24-hr rainfall depth
Rational C, pre -development
Rational C, post -development
Rainfall intensity: 1-yr, 24-hr stone
Pre -development 1-yr, 24-hr peak flow
Post -development i-yr, 24-hr peak flow
Pre/Post 1-yr, 24-hr peak flow control
Elevations
Temporary pool elevation
Permanent pool elevation
SHWT elevation (approx. at the perm. pool elevation)
Top of 10ft vegetated shelf elevation
Bottom of 10f1 vegetated shelf elevation
Sediment cleanout, top elevation (bottom of pond)
Sediment cleanout, bottom elevation
Sediment storage provided
Is there additional volume stored above the slate -required temp. pool?
Elevation of the top of the additional volume
fta
to
It
Ifta
Y _...,(Y or N)
3.3in
0.30 (unless)
0.57 (unittess)
0.14Jifthr OK
0.21 ftalsec
0.41 ft°Isec
0.19 ftalsec
31,30, frost
30.40 fmsl
ly_ J /
Stee-fjona
32,00 fmsl
qI. e-s ,
30.90. fmsl
29,90 frost
k' d<5 rfn Mrrd2r cv7' ia.-S
1 25.90 fmsl
1 24.90 first
1.00 It
N _ :(Y or N)
i
131.31; fmsl OK
Form SW401-Wet Detention Basin-Rev.8-9117I09 Parts 1.811. Design Summary, Page 1 of 2

Permit No.
(to be pmvided by DWO)
II. DESIGN INFORMATION
Surface Areas 4
Area, temporary pool
24,409 ft'
Area REQUIRED, permanent pool
12,378 ft'
SA/DA ratio
5.60 (unidess)
Area PROVIDED, permanent pool, A,,_.
'20,018 ft"
OK
Area, bottom of 10ft vegetated shelf, AwL,i,pit
- 16,023ft'
Area, sediment cleanout, lop elevation (bottom of pond), A,,_.
6503 ft'
Volumes
Volume, temporary pool
20,465, ffs
OK
Volume, permanent pool, V.-p,
54,509. it'
Volume, forebay (sum of forebays if more than one forebay)
10,433ft'
Forebay % of permanent pool volume
19.1% %
OK
SAIDA Table Data
Design TSS removal
90 %
Coastal SAIDA Table Used?
Y :(Y or N)
Mountain/Piedmont SAIDA Table Used?
N ,(Y or N)
SAIDA ratio
5.60 (unitless)
Average depth (used in SAIDA table):
,._,._......_........._.....
Calculation option 1 used? (See Figure 10.2b)
--1
'.N I (Y or N)
Volume, permanent pool, Vp -PW
54,509 ft'
Area provided, permanent pool, Aa„r, p,
20,018 ft2
Average depth calculated
3.30ft
OK
Average depth used in SAIDA, d,,, (Round to nearest 0.511)
3.5 ft
OK
Calculation option 2 used? (See Figure 10-2b)
Y' , I (Y or N)
Area provided, permanent pool, A. p'
20,018 ftz
Area, bottom of 10ft vegetated shelf, A...
16,023 ft
Area, sediment cleanout, top elevation (bottom of pond), A.,„a
6,503 ft'
"Depth" (distance b/w bottom of 1Oft shelf and top of sediment)
4.00 It
Average depth calculated
3.30ft
OK
Average depth used in SAIDA, d,,, (Round to nearest 0.5ft)
3.5 ft
OK
Drawdown Calculations
Drawdown through orifice?
_ _ _
Y
_ _
(Y or N)
Diameter of orifice (if circular)
2.00. in
Area of orifice (if -non -circular)
' in'
Coefficient of discharge (Cu)
- 0.60'(unitless)
Driving head (Ho)
0.82 it
Drawdown through weir?
N
(Y or N)
Weir type
-(unidess)
Coefficient of discharge (C.)
'. (unitless)
Length of weir (L)
It
Driving head (H)
It
Pre -development 1-yr, 24-hr peak flow
0.21' ft'/sec
Post -development 1-yr, 24-hr peak flow
0.411 ft'/sec
Storage volume discharge rate (through discharge onfce or weir)
0.06 ft'/sec
Storage volume drawdown time
t: -
4.10, days
Additional Information
Vegetated side slopes
3 :1
Vegetated shelf slope
10 :1
Vegetated shelf width
10.0.ft
Length of flowpath to width ratio
5:1
Length to width ratio
4.5:1
Trash rack for overflow & orifice?
Y
(Y or N)
Freeboard provided
- 1,0'ft
Vegetated filter provided?
N
(Y or N)
Recorded drainage easement provided?
Y
(Y or N)
Capures all runoff at ultimate build -out?
Y
' (Y or N)
Drain mechanism for maintenance or emergencies is:
'Pump out
Of, draws down in 2-5 days.
OK
OK
OK
OK
OK
OK
OK
OK
OK
OK
Form SW401-Wet Detention Basin-Rev,8-9/17/09 Parts I. & II. Design Summary, Page 2 of 2

Permit
(to be provided by DWQ)
III. REQUIREDdTEMS CHECKLIST
Please indicate the page or plan sheet numbers where the supporting documentation can be found. An incomplete submittal package will
result in a request for additional information. This will delay final review and approval of the project. Initial in the space provided to
indicate the following design requirements
have been met. If the applicant has designated an agent, the agent may initial below. If a
requirement has not been met, attach justification.
Page/Plan
Initials
Sheet No.
5-1
1. Plans (1" - 50' or larger) of the entire site showing: MAR 2 Q 2010
/
fS rrw5 PA-7
- Design at ultimate build -out,
0a-3
- Off -site drainage (if applicable),
"l' �' ^
- Delineated drainage basins (include Rational C coefficient per basin),
- Basin dimensions,
- Pretreatment system,
- High flow bypass system,
- Maintenance access,
- Proposed drainage easement and public right of way (ROW),
- Overflow device, and
- Boundaries of drainage easement.
b"L
2. Partial plan (1" = 30' or larger) and details for the wet detention basin showing:
- Outlet structure with trash rack or similar,
- Maintenance access,
- Permanent pool dimensions,
- Forebay and main pond with hardened emergency spillway,
- Basin cross-section,
- Vegetation specification for planting shelf, and
- Filter strip.
3. Section view of the wet detention basin (1" = 20' or larger) showing:
- Side slopes, 3:1 or lower,
- Pretreatment and treatment areas, and
- Inlet and outlet structures.
All
Y-1
4. If the basin is used for sediment and erosion control during construction, clean out of the basin is specified
on the plans prior to use as a wet detention basin.
/
An ✓a 1
5. A table of elevations, areas, incremental volumes & accumulated volumes for overall pond and for Forebay,
to verify volume provided.
t r4 f _I'
6. A construction sequence that shows how the wet detention basin will be protected from sediment until the
entire drainage area is stabilized.
14
4AV
7. The supporting calculations.
/T
8. A copy of the signed and notarized operation and maintenance (0&M) agreement.
9. A copy of the deed restrictions (if required).
AIM-AIM-41
10. A soils report that is based upon an actual field investigation, soil borings, and infiltration tests. County
soil maps are not an acceptable source of soils information.
Form SW401-Wet Detention Basin-Rev.8-9/17/09 Part III, Required Items Checklist, Page 1 of 1

Permit Number: St") 7 / DO 31 0
(to be provided by DWQ)
Drainage Area Number:
Wet Detention Basin Operation and Maintenance Agreement
I will keep a maintenance record on this BMP. This maintenance record will be kept in a
log in a known set location. Any deficient BMP elements noted in the inspection will be
corrected, repaired or replaced immediately. These deficiencies can affect the integrity
of structures, safety of the public, and the removal efficiency of the BMP.
The wet detention basin system is defined as the wet detention basin," �'
pretreatment including forebays and the vegetated filter if one is provided.
MAR 2 4 2010
This system (check one): t9 tt ; r; , 0
❑ does ® does not incorporate a vegetated filter at the outlet. t �P\r` i 0
This system (check one):
❑ does ® does not incorporate pretreatment other than a forebay.
Important maintenance procedures:
— Immediately after the wet detention basin is established, the plants on the
vegetated shelf and perimeter of the basin should be watered twice weekly if
needed, until the plants become established (commonly six weeks).
— No portion of the wet detention pond should be fertilized after the first initial
fertilization that is required to establish the plants on the vegetated shelf.
— Stable groundcover should be maintained in the drainage area to reduce the
sediment load to the wet detention basin.
— If the basin must be drained for an emergency or to perform maintenance, the
flushing of sediment through the emergency drain should be minimized to the
maximum extent practical.
— Once a year, a dam safety expert should inspect the embankment.
After the wet detention pond is established, it should be inspected once a month and
within 24 hours after every storm event greater than 1.0 inches (or 1.5 inches if in a
Coastal County). Records of operation and maintenance should be kept in a known set
location and must be available upon request.
Inspection activities shall be performed as follows. Any problems that are found shall
be repaired immediately.
BMP element:
Potentialproblem:
How I will remediate theproblem:
The entire BMP
Trash debris is present.
Remove the trash/debris.
The perimeter of the wet
Areas of bare soil and/or
Regrade the soil if necessary to
detention basin
erosive gullies have formed.
remove the gully, and then plant a
ground cover and water until it is
established. Provide time and a
one -titre fertilizer application.
Vegetation is too short or too
Maintain vegetation at a height of
long_
approximately six inches.
Form SW401-Wet Detention Basin O&M-Rev.4
Page 1 of 4

Permit N
(m be provided by DWQ)
Drainage Area Number:
BMP element:
Potentialproblem:
How I will remediate theproblem:
The inlet device: pipe or
The pipe is clogged.
Unclog the pipe. Dispose of the
swale
sediment off -site.
The pipe is cracked or
Replace the pipe.
otherwise damaged.
Erosion is occurring in the
Regrade the swale if necessary to
swale.
smooth it over and provide erosion
control devices such as reinforced
turf matting or riprap to avoid
future problems with erosion.
The forebay
Sediment has accumulated to
Search for the source of the
a depth greater than the
sediment and remedy the problem if
original design depth for
possible. Remove the sediment and
sediment storage.
dispose of it in a location where it
will not cause impacts to streams or
the BMP.
Erosion has occurred.
Provide additional erosion
protection such as reinforced turf
matting or riprap if needed to
prevent future erosion problems.
Weeds are present.
Remove the weeds, preferably by
hand. If pesticide is used, wipe it on
the plants rather than spraying.
The vegetated shelf
Best professional practices
Prune according to best professional
show that pruning is needed
practices
to maintain optimal plant
health.
Plants are dead, diseased or
Determine the source of the
dying.
problem: soils, hydrology, disease,
etc. Remedy the problem and
replace plants. Provide a one-time
fertilizer application to establish the
ground cover if a soil test indicates
it is necessary.
Weeds are present.
Remove the weeds, preferably by
hand. If pesticide is used, wipe it on
the plants rather than spraying.
The main treatment area
Sediment has accumulated to
Search for the source of the
a depth greater than the
sediment and remedy the problem if
original design sediment
possible. Remove the sediment and
storage depth.
dispose of it in a location where it
will not cause impacts to streams or
the BMP.
Algal growth covers over
Consult a professional to remove
50% of the area.
and control the al a"spray).
Cattails, phragmites or other
Remove the plants
invasive plants cover 50% of
with pesticide (do n
the basin surface.
Form SW401-Wet Detention Basin O&M-Rev.4 Page 2 of 4

Permit Number:
(to be provided by DWQ)
Drainage Area Number:
BMP element:
Potentialproblem:
How I will remediate theproblem:
The embankment
Shrubs have started to grow
Remove shrubs immediately.
on the embankment.
Evidence of muskrat or
Use traps to remove muskrats and
beaver activity is present.
consult a professional to remove
beavers.
A tree has started to grow on
Consult a dam safety specialist to
the embankment.
remove the tree.
An annual inspection by an
Make all needed repairs.
appropriate professional
shows that the embankment
needs repair. if applicable)
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 local NC Division of
damage have occurred at the
Water Quality Regional Office, or
outlet.
the 401 Oversight Unit at 919-733-
1786.
The measuring device used to determine the sediment elevation shall be such
that it will give an accurate depth reading and not readily penetrate into
accumulated sediments.
When the permanent pool depth reads 4.5 feet in the main pond, the sediment
shall be removed.
When the permanent pool depth reads 3 feet in the forebay, the sediment shall
be removed.
Sediment Removal
Bottom
27.4 I 1
-----------------
BASIN DIAGRAM
(fill in the biankc)
ft Min.
Sediment
Storage
Permanent Pool Elevation 30.4
Pool
\ - Sediment Removal Elevation 25.9 Volur
Bottom Elevation 24.9 1 l-ft
Storage
FOREBAY
MAIN POND
Form SW401-Wet Detention Basin O&M-Rev.4 Page 3 of 4

Permit Number:
(to be provided by DWQ)
I acknowledge and agree by my signature below that 1 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 party.
Project name: Plymouth Municipal Airport - T-Hangar Area Development
BMP drainage area number: I
Print name: David Peoples
Title: County Manager, Washington County
Address: P.O. Bo_x_1007, Plymouth, NC 27962
Phone: [phone]
Signature: J;� ' 1_e-Z'A-
Date: 3313 %so
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, O-02; W auIL(, , a Notary Public for the State of
/1/(�► `iQ✓O�iiVA , County of VV0,5hI'A1A0A1 do hereby certify that
��a�t d �Ponl e s personally appeared before me this
day of VAOL.On Z�, and acknowledge the due execution of the
forgoing wet detention basin maintenance requirements. Witness my hand and official
seal,
II
SEAL
My commission expires I oZ/ 10 11010 1?j
Form SW401-Wet Detention Basin O&M-Rev.4
Page 4 of 4