SW7060702_CURRENT PERMIT_20070105

STORMWATER DIVISION CODING SHEET
POST -CONSTRUCTION PERMITS
PERMIT NO.
SW2k
DOC TYPE
CURRENT PERMIT
❑ APPROVED PLANS
❑ HISTORICAL FILE
❑ COMPLIANCE EVALUATION INSPECTION
DOC DATES
YYYYMMDD

Michael F. Easley, Governor
William G. Ross Jr., Secretary
North Carolina Department of Environment and Natural Resources
Alan W. Klimek, P.E. Director
Division of Water Quality
DIVISION OF WATER QUALITY
January 5, 2007
GBP Associates, LLC
Attn: Mr. Brian J. Kane
7006 Little River Turnpike, Suite L
Annandale, VA 22003
Subject: Stormwater Permit No. SW7060702
Gateway Business Park
High Density Stormwater Project
Currituck County
Dear Mr. Kane:
The Washington Regional Office received your revised
stormwater submittal on October 12, 2006. It has been determined
that this project will comply with the Stormwater Regulations set
forth in Title 15A NCAC 2H.1000. We are forwarding Permit
SW7060702 dated January 5, 2007 to GBP Associates, LLC for the
construction and operation of a wet detention pond to serve
Gateway -Business Park located at 7532 Caratoke Highway near
Jarvisburg, NC.
This permit shall be effective from the date of issuance
until January 5, 2017, 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, 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.ncwateraualitv.ore
943 Washington Square Mall Phone [phone]
Washington, NC 27889 Fax [phone]
NorthCarolina
Naturally
An Equal Opportunity/Affirmative Action Employer — 50% Recycled110% Post Consumer Paper

GBP Associates, LLC
January 5, 2007
Page Two
If you have any questions, or need additional information
concerning this matter, please contact Bill Moore at (252) 948-
3919.
S'nce ely,
L.
I
Al Hodge, Regional Supervisor
Surface Water Protection Section
Washington Regional Office
cc: Performance Engineering
C}�rrituck County Planning/Inspections
✓Washington Regional Office
Central Files

State Stormwater Management Systems
Permit No. SW7060702
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
GBP Associates, LLC
Currituck County
FOR THE
construction, operation and maintenance of stormwater management
systems 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
a wet detention pond to serve the Gateway Business Park located at
7532 Caratcke Highway near Jarvisburg, NC.
This permit shall be effective from the date of issuance until
January 5, 2017, 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 on page 4 of this permit,
the Project Data Sheet.
3. Approved plans and specifications for this project are
incorporated by reference and are enforceable parts of the
permit.
3

DIVISION OF WATER QUALITY
PROJECT DATA
Project Name:
Gateway Business Park
Permit Number:.
SW7060702
Location:
Currituck County
Applicant:
GBP Associates, LLC
Mailing Address:
7006 Little River Turnpike, Suite L
Annandale, VA 22003
Application Date:
07/03/2006; original
10/12/2006; revised
Receiving Stream:
North River
Stream Classification:
SC
Total Site Area:
Total Impervious:
Area Allowed
Pond Depth:
Required Storage Volume
Provided Storage Volume:
Required Surface Area:
Provided Surface Area:
Controlling Orifice:
3.83 acres
2.43 acres
5.5 ft
8754 cf
19,811 cf
6836 sf
7351 sf
drawndown orifice 1.5-inch at
elevation 8.5 ft
V,

4. No homeowner/lot owner/developer shall be allowed to fill in,
alter, or pipe any vegetative practices (such as swales)
shown on the approved plans as part of the stormwater
management system without submitting a revision to the permit
and receiving approval from the Division.
S. The following items will require a modification to the
permit:
a. Any revision to the approved plans, regardless of size
b. Project name change
C. Transfer of ownership
d. Redesign or addition to the approved amount of built -
upon area
e. Further subdivision of the project area.
In addition, the Director may determine that other revisions
to the project should require a modification to the permit.
6. 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.
II. SCHEDULE OF COMPLIANCE
1. The permittee will comply with the following schedule for
construction and maintenance of the stormwater management
system.
a. 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 surfaces except roads.
b. During construction, erosion shall be kept to a minimum
and any eroded areas of the system will be repaired
immediately.
2. The facilities must be properly maintained and operated at
all times. The approved Operation and Maintenance Plan must
be followed in its entirety and maintenance must occur at the
scheduled intervals.
3. The permittee shall at all times provide the operation and
maintenance necessary to assure the permitted stormwater
system functions at optimum efficiency including, but not
limited to:
5

a. Semiannual scheduled inspections (every 6 months)
b. Sediment removal
C. Mowing and revegetation of side slopes
d. Immediate repair of eroded areas
e. Maintenance of side slopes in accordance with approved
plans and specifications
f. Debris removal and unclogging of outlet structure,
orifice device and catch basins and piping.
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. 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 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. Mail the
Certification to the Washington Regional Office, 943
Washington Square Mall, Washington, North Carolina, 27889,
attention Division of Water Quality.
7. A copy of the approved plans and specifications shall be
maintained on file by the Permittee for a minimum of five
years from the date of the completion of construction.
III. GENERAL CONDITIONS
1. This permit is not transferable. In the event there is a
desire for the facilities to change ownership, or there is a
name change of the Permittee, a formal permit request must be
submitted to the Division of Water Quality accompanied by an
application fee, 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.
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 143-215.6(a) to 143-215.6(c).
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) which have jurisdiction.
6

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.
S. 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.
6. At least six months prior to the expiration date, the
permittee must submit a written request for permit renewal
to the Division of Water Quality, Washington Regional
Office.
Permit issued this the 5 th day of January, 2007.
NORTH CAROLINA ENVIRONMENTAL MANAGEMENT COMMISSION
Alan W. Klimek, P.E. Director
Division of Water Quality
By Authority of the Environmental
Permit Number SW7060702
7
Management Commission

0
Stormwater Permit No. SW7060702
Gateway Business Park
Wet Pond System
Currituck County
Designer's Certification
I, , as a duly
registered Professional Engineer in the State of North Carolina,
having been authorized to observe (periodically/weekly/full time)
the construction of the project,
for
(Project)
(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.
Signature
Registration Number
Date

04M
V-'m QUAR® State of North Carolina
Department of Environment and Natural Resources
Division of Water Quality
Se'�°1t
STORMWATER MANAGEMENT PERMIT APPLICATION FORM , [
This fonn may be 11hotocoyied for use as an original
/IQY►s.Tr�v�
I. GENERAL INFORMATION,n�
1. Applicants name (specify the name of the corporation, individual, etc. who owns the project): 98
G f3? 4,! �C�C I - iQ � LLC 7,,
2. Print Owner/Signing Official's name and title (person legally responsible for facility and compliance):
3. Mailing Address for person listed in item 2 above:
1Qo L'� i 1 0 R i F{ Ti mlv. ►ke S 'do f
City: A n n 2 . rJ a I to State: VA Zip: 220 n
Telephone Number: f -1 p 1 ) (} g ? ej 1 n o E1 T 12-
4. Project Name (subdivision, facility, or establishment name -should be consistent with project name on
plans, specifications, letters, operation and maintenance agreements, etc.):
5. Location of Project (street address):
City:
6. Directions to project (from nearest major
County: C U r r t 1 r) C
F Q. tIS�(L.2\Vsr flvlNiz `
7. Latitude:_}]'J�' In. Z1 � Longitude:_W 0J, ` j j (, 9 t of project
S. Contact person who can answer questions about the project: C
Name: IJP.✓f W d ✓t Jr�Pr, Telephone Number. ( _1�7. )_AAI ��j��•
V. > 1,
II. PERMIT INFORMATION:
1. Specify whether project is (check one): New Renewal Modification
FormSWU-101 Version3.99 Page Iof4

2. If this application is being submitted as the result of a reriei+-al or modification to an`exist me permit, list the
existing•permit nuunber':B'3 and its issue date (if k o gin)' - /k
3. Specify the type of project (check one):
Low Density _High Density Redevelop _General Perri -Lit _Other
4. Additional Project Requirements (check applicable blanks):
_LAMA Major —Sedimentation/Erosion Control _404/401 Permit NPDES Stormwater
Information on required state permits can be obtained by contacting the Customer Service Center at
1-577-623-6748.
III. PROJECTINFORMATION
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.
u
2. Stormwater runoff from this project drains to the River basin.
3. Total Project Area: 3 . `e',"L n acres
5. How many drainage areas does the project have? I
4. Project Built Upon Area:6 -:S �3 %
6. 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.
Basm Info;matron ,,
* Dramage?Area 1
xR y� ,Dr inage Area 2 ii's F, •,
Receiving Stream Name
( j
Nile 4
Receiving Stream Class
Drainage Area
Existing Impervious* Area
Proposed Impervious"Area
% Impervious* Area (total)
3 �?•
Im en tour' SurfaceAiea „y,
}r•'DraznageArea 1 .:w ,
prarnage Area 2
On -site Buildings
On -site Streets
On -site Parking
On -site Sidewalks
S
Other on -site
_'
Off -site
Total: r�
Total:
" Impervious area is defined as tire built upon area including, but not limited to, buildings, roads, parking areas,
sidewalks, gravel areas, etc.
Form S1VU-101 Version 3.99 Page 2 of 4

a. 1
9. How was the off -site impervious area listed above derived?�
IV. DEED RESTRICTIONS AND PROTECTIVE COVENANTS
The following italicized 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.
1. The following covenants are intended to ensure ongoing compliance with state stormwater management permit
number as issued by the Division of Water Quality. These covenants may
not be clanged or deleted without the consent of the State.
2. No more than . �J/A square feet of any lot shall be covered by structures or impervious materials.
Impervious materials include asphalt, gravel, concrete, brick, stone, slate or similar material but do not include wood
decking or the water surface of swimming pools.
3. Swales shall not be filled in, piped, or altered except as necessary to provide driveway crossings.
4. Built -upon area in excess of the permitted amount requires a state stormwater management permit modification prior to
constnuction.
5. All permitted runoff from outparcels or future development shall be directed into the permitted stormwater control
system. These connections to the stormwater control system shall be performed in a manner that maintains the
integrity and performance of the system as permitted.
By your signature below, you certify that the recorded deed restrictions and protective covenants for this project
shall include all the applicable items required above, 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. SUPPLEMENTFORMS
The applicable state stormwater management permit supplement form(s) listed below Imust 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 SWU-102
Wet Detention Basin Supplement
Form SWU-103
Infiltration Basin Supplement
Form SWU-104
Low Density Supplement
Form SWU-105
Curb Outlet System Supplement
Form SWU-106
Off -Site System Supplement
Form SWU-107
Underground Infiltration Trench Supplement
Form SWU-108
Neuse River Basin Supplement
Form SWU-109
Innovative Best Management Practice Supplement
Form SWU-101 Version 3.99 Page 3 of 4

\'I. 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 Regional Office.
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
• One copy of the applicable Supplement Form(s) for each BMP
• Permit application processing fee of $420 (payable to NCDENR)
• Detailed narrative description of stormwater treatment/management
• Two copies of plans and specifications, 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 stonnwater 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. 1
Designated agent (individual or firm):
Mailing Address: B 4 C A V.i�/ -
City: ?C,"k;0-11S PC) I State: Zip: Z1�G
Phone: (ZS Z. ) !qn I --),a S�
VIII. APPLICANT'S CERTIFICATION
Fax: (7S 2 ) 451 S I I Z
I, (print or type nante of person listed in General Inforntation, item 2) a '(I a h h C_
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._ _ I
Date: L Oli
Amfe✓vr451 LLC
Form SWU-101 Version 3.99 Page 4 of 4

Permit No
(to be provided bY DWQ)
State of Nortli Carolina
Department of Environment and Natural Resources
Division of Water Quality
STORMII'ATER MANAGEMENT PERMIT APPLICATION FORN4
WET DETENTION BASIN SUPPLEMENT
This forn: may be photocopied for use as an original
DWO Stormwater Management Plan Review:
A complete storinwater management plan submittal includes an application form, a wet detention basin
supplement for each basin, design calculations, and plans and specifications showing all basin and outlet
structure details.
I. PROJECT INFORMATION
Project Name: Ci 711" [ V t a U ENO i"Or 17S 1- DIY t,
Contact Person: (Zobt i Q1e U (1 5��-E- Phone Number: (25Z ) 4e11 b15¢
For projects with multiple basins, specify which basin this worksheet applies to:f tui)l Q b2IS1v21
elevations
Basin Bottom Elevation
Permanent Pool Elevation
Temporary Pool Elevation
3.0 Ste p�avit�
(flow of the basin)
(elevation of the orifice)
(elevation of the discharge structure overflow)
areas
Permanent Pool Surface Area 7 �5 I sq. ft. (water surface area at the orifice elevation)
Drainage Area 3.83 ac. (on -site and off -site drainage to the basin)
Impervious Area % 4z ac. (on -site and off -site drainage to the basin)
volumes
Permanent Pool Volume
Temporary Pool Volume
Forebay Volume
Otter parameters
S A/DA t
Diameter of Qrifice
Design Rainfall
Design TSS Removal 2
lR 5 3 f cu. ft.
A' ✓ cu. ft.
cu. ft.
(combined vohone of stain basin and forebay)
(vohone detained above the pennanent pool)
(approximately 20% of total vohone)
(surface area to drainage area ratio from Dlt'Q table)
(2 to 5 day temporary pool draw -down required)
(minimum 85% required)
Form SR'U-102 Rev 3.99 Page 1 of 4

Footnote::
I When using the Division SAMA table;, the correct SAMA ratio for perninnent pool sizing should be computed based upon the
actual impFFrvious e and permanent pool depth. Linear interpolation should be emplo}'ed to determine the correct value for non-
standard table entries.
2 In the 20 coastal counties, the requirement for a vegetative filter may be «aived if the wet detention basin is designed to provide
90% TSS iemoval. The NCDFNR BMP manual provides design tables for both Si% TSS removal and 90% TSS removal.
IL REQUIRED ITEMS CHECKLIST
The following checklist outlines design requirements per the Stornnvater Best Management Practices Manual
(N.C. Department of Environment, Health and Natural Resources, February 1999) and Administrative Code
Section: 15:A NCAC 21-1.1008.
I
Initial in the space provided to indicate the following design requirentents'have been met and supporting
documentation is attached. If the applicant has designated an agent in the Stonmvater Management Permit
Application Form, the agent may initial below. If a requirement has not been met, attach justification.
Applicants Initials
a. The permanent pool depth is between 3 and 6 feet (required minimum of 3 feet).
oQ b. The forebay volume is approximately equal to 20%a of the basin volume.
c. The temporary pool controls runoff from the design storm event.
d. The temporary pool draws down in 2 to 5 days.
NSA e. If required, a 30-foot vegetative filter is provided at the outlet (include non -erosive flow
calculations)
f. The basin length to width ratio is greater than 3:1.
p,S g. The basin side slopes above the permanent pool are no steeper than 3:1.
li. A submerged and vegetated perimeter shelf with a slope of 6:1 or less (show detail).
r5 i. Vegetative cover above the permanent pool elevation is specified.
j. A trash rack or similar device is provided for both the overflow and orifice.
NIA k. A recorded drainage easement is provided for each basin including access to nearest right-
of-way.
fJ�K 1. If the basin is used for sediment and erosion control during construction, clean out of the
basin is specified prior to use as a wet detention basin.
Olt' 4 in. A mechanism is specified which will drain the basin for` iiiaintenance or an emergency.
Ill. VET DETENTION BASIN OPERATION AND MAINTENANCE AGREEMENT
The wet detention basin system is defined as the wet detention basin, pretreatment including forebays and the
vegetated filter if one is provided.
This system (check one) 0 does oes not incorporate a vegetated filter at the outlet.
'i'his Syskmi (check one) 0 ducs dues not incorporate pretreatmeul other than a tbrebay.
Form SWU-102 Rev 3.99 Page 2 of 4

Maintenance activities shall be performed as follows:
1. After every significant runoff producing rainfall event and at least monthly:
a. Inspect the wet detention basin system for sediment accumulation, erosion, trash accumulation,
vegetated cover, and general condition.
b. Check and clear the orifice of any obstructions such that drawdown of the temporary pool occur
within 2 to 5 days as designed.
2. Repair eroded areas immediately, re -seed as necessary to maintain good vegetative cover, mow vegetative
cover to maintain a maximum height of six inches, and remove trash as needed.
3. Inspect and repair the collection system (i.e. catch hasins, piping, swales, tiprap, etc.) quarterly to
maintain proper functioning.
4. Remove accumulated sediment from the wet detention basin system semi-annually or when depth is
reduced to 75% of the original design depth (see diagram below). Removed sediment shall be disposed
of in an appropriate manner and shall be handled in a manner that will not adversely impact water quality
(i.e. stockpiling near a wet detention basin or stream, etc.).
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 feet in the main pond, the sediment shall be removed.
When the permanent pool depth reads feet in the forebay, the sediment shall be removed.
Sediment
Bottom El
d E1. 4•2i
-- .tion 3. S
EOREBAY
13ASIN DIAGRAM
(fill in the blanks)
Perm Wnant Pool Elevation fi
Sediment Removal Elevation —1-1� 754c
----------------------- -------
Bottom Elevation 3, S 4 25%
MAIN POND
5. Remove cattails and other indigenous wetland plants when they cover 50% of the basin surface. These
plants shall be encouraged to grow along the vegetated shelf and forebay berm.
6. If the basin must be drained for an emergency or to perform maintenance, the flushing of sediment
thiowu h the emer�.encv drnin .shall he. minimizc.rl In the maximum extent practical.
Form S\\'U-102 Rev 3.99 Page 3 of 4

All components of the %%ct (ILietlllon basin sy'stcnt shall be maintained in good %%orking order.
1 acknowledge and agree by my signnture below that I am responsible for the performance of the seven
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.
Print name: 13 V -. h ".S , K '61 YOU_
Title: c
Address: 'Ib0 Lt Io 2 1yQV Tt)1�h�1��0 S0', 1VA 21603
Phone: -la3 C..4 2 o )on 12
Signature:
Date:.
G.9/�,t1?JoCi vT.tsl, .cG�
Note: The legally responsible party should not be a hotncowners association unless more than 50% of the lots have been sold and
a resident of the subdivision has been named the president.
of a Notary Public for the State of ,
County of do hereby certify that
personally appeared before me this _��o day of 1 t try_ l and acknowledge the due
execution of the forgoing wet detention basin maintenance requirements. Witness my hand and official seal,
SEAL
My commission expires � 131 I c)U
Form S\VU-102 Rev 3.99 Page 4 of 4