SW7070121_CURRENT PERMIT_20070709

STORMWATER DIVISION CODING SHEET
POST -CONSTRUCTION PERMITS
PERMIT NO.
SW 7��1
DOC TYPE
CURRENT PERMIT
APPROVED PLANS
❑ HISTORICAL FILE
❑ COMPLIANCE EVALUATION INSPECTION
DOC DATES
YYYYMMDD

W ATFRO
Michael F. Easley, GovernorQ
��F
Jr., Secretary
r.
William G. Ross
North Carolina Department of Environment and Natural Resources
Coleen H. Sullins Director
-
Division of Water Quality
DIVISION OF WATER QUALITY
July 9, 2007
Harvey Point Defense Testing Activity
Attn: Mr. Gary Sheeres
2835 Harvey Point Road
Hertford, NC 27944
Subject: Stormwater Permit No. SW7070121
Harvey Point Defense Facility
CTEC Building
High Density Stormwater Project
Perquimans County
Dear Mr. Sheeres:
The Washington Regional Office received your completed
Stormwater Application for the subject project on May 3, 2007.
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.1O00. We are
forwarding Permit No. SW7070121 dated July 9, 2007 to Harvey Point
Defense Testing Activity at Hertford, NC.
This permit shall be effective from the date of issuance
until July 9, 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 h2o.enr.state.nc.us
943 Washington Square Mall Phone: [phone]
Washington, NC 27889 PAX 252.946-9215
An Equal GpportunitylAKrmadve Aadon Employer — 50% Recycled170°% Post Consumer Paper
Nne
orthCarolina
Naturally

Harvey Point Defense Testing Activity
July 9, 2007
Page Two
If you have any questions, or need additional information
concerning this matter, please contact Mr. Bill Moore at (252)998-
3919.
kierely,
Al Hod e, Aegional Supervisor
Surface Water Protection Section
Washington Regional Office
cc: Ijankins & Anderson Consulting Engineers
ARO Stormwater Files
Central Files

W
d
State Stormwater Management Systems
Permit No. SW7070121
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
Harvey Point Defense Testing Activity
Perquimans 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
grassed swales and (2) Extended Dry Detention Basins to serve the
new CTEC Building located near Hertford, NC.
This permit shall be effective from the date of issuance until
July 9, 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:
Permit Number:
Location:
Applicant:
Mailing Address:
Application Date:
Water Body Receiving Stormwater
Runoff:
Classification of Water Body:
Total Site Area:
Total Impervious
Surfaces Allowed:
Basin Depths:
Required Storage Volume:
Provided Storage Volume:
Provided Surface Area:
Storage Elevations:
19
Harvey Point DTA
New CTEC Building
SW7070121
Perquimans County
Harvey Point Defense
Testing Activity
2835 Harvey Point Road
Hertford, NC 27944
O1/16/2007; original
O3/03/2007; complete
UT-Perquimans River
SB
5.9 acres
5.7 acres
1.67 - South Basin
2.50 - North Basin
8033 cf - South Basin
13,349 cf - North Basin
10;200 cf South Basin
16,019 cf North Basin
6240 sf South Basin
14,095 sf North Basin
6.50 ft South Basin
6.00 ft North Basin
A

1
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.
5. 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:
0

a. Semi-annual 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

W
9. 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 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 6 months prior to the expiration date, the permittee
shall request that this permit be renewed.
Permit issued this the 9 th day of July, 2007.
NORTH CAROLINA ENVIRONMENTAL MANAGEMENT COMMISSION
For Coleen H. Sullins, Director
Division of Water Quality
By Authority of the Environmental
Permit Number SW7070121
7
Management Commission

Stormwater Permit SW7070121
Harvey Point Defense Testing Activity
New CTEC Facilities
Grassed Swales & (2) Extended Dry Detention Basins
Designer's Certification
, 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
7

July 9, 2007
Director's Certification
For Coleen H. Sullins
Subject: Waiver of Deed Restrictions and Protective Covenants for Harvey
Point Defense Testing Facility
Stormwater Permit No. SW7070121
Project Name - CTEC Building
Perquimans County
As provided in the Director's Certification provisions of 15A NCAC
21-1,1003(d)(4), this letter waives the requirements for mandatory deed restrictions and
protective covenants contained in 15A NCAC 2H.1003(d)(1) and 2H.1003(d)(2) for all
United States Department of Defense (DoD) facilities and installations located within
North Carolina. In lieu of these deed restrictions and protective covenants, DoD
installations and facilities affected by this Certification will be required to submit written
correspondence certifying that the Facility Master Plan will be appropriately modified to
ensure that the subject development will be maintained consistent with the plans and
specifications approved by the Division of Water Quality in the applicable permits.
CC: Al Hodge, WARO
Bradley Bennett, Stormwater Group

-4e4t
Stormwater Permit SW7070121
Harvey Point Defense Testing Activity
New CTEC Facilities
Grassed Swales & (2) Extended Dry Detention Basins
Designer's Certification
MAY 0 4 Zoos
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, 4 ZZZ- F�4-111
(Project)
ct 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
Registratih-, G ber /(fir'- PE - +4e
Date z4r2// 3Q, 10�
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Date Received(
Fee Paid
Permit Number
MAY - 3 2001
2D
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DWQ-WAR® State of North Carolina
Department of Environment and Natural Resources
Division of Water Quality
STORMWATER MANAGEMENT PERMIT APPLICATION FORM
This form may be photocopied for use as an original
I. GENERAL INFORMATION
1. Applicants name (specify the name of the corporation, individual, etc. who owns the project):
Ncvvr'J NbeeASc Tr5'4C.q_�ic�tvty (c!$, Lovrlrno(
2. Print Owner/Signing Official's name and title
Mr. 6
� cc res D Yr
legally responsible for facility and compliance):
eC-
ovGir
3. Mailing Address for person listed initem 2 above: \, A !�y►V . Co rla /a,
Z6 � �3 t��
Z 835 140.rQ(4 I"atJ P- wd `.
City: lei+-Fo r l State: N• G • Zip: Z7 o,4 4-
Telephone Number: ( 252 ) 42-4 - 436 0
4. Project Name (subdivision, facility, or establishment name - should be consistent with project name on plans,
specifications, letters, operation and maintenance agreements, etc.):
C7EC
5. Location of Project (street address):
City: 4e/+Tor County:
6. Directions to project (f om nearest major intersection):
�o�ss dS �� i7 i�t�rco� 7o the e�dv�roasl�fy�f
7. Latitude: 1 3C * 06 15 Longitude: t^-J 7C , 2 0
g 3P of project
8. Contact person who can answer questions about the project:
Name: Ti..J �or Telephone Number: ( 252 ) 4-26 _ 434 0
II. PERMIT INFORMATION:
1. Specify whether project is (check one): ti/New Renewal Modification
FormSWU-101 Version3.99 Page Iof4

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2. If this application is being submitted as the result of a renewal or modification to an existing permit, list the
existing permit number and its issue date (if known)
3. Specify the type of project (check one):
=Low Density ­_P High Density ✓ Redevelop General Permit Other
4. Additional Project Requirements (check applicable blanks):
_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 1storm11 wttater management for the project. SS
SFdfr w.}v W.11 �t TIf.Tta ro�94 ��� ✓5t. o4rj lre� SwnlC$
M -}wo Gx+C�lf Dry �ti-G.'('lon 13 a$t..5
2. Stormwater runoff from this project drains to the 49�U1/_11- /r � River basin.
3. Total Project Area: 5.89 acres
5. How many drainage areas does the project have? 1
4. Project Built Upon
1,VAc: 30.7
9/6
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 provicje✓-irythe same format albe1 .
Q 1? 7
Basin riformation ,
""- �
Receiving Stream Name
� rea
Dnama ��.
pef u. �_ -- - R W e/
Receiving Stream Class
Z a
Drainage Area
5.89 Acres
Existing Impervious" Area
p,'7e( Arr,c
Proposed Impervious*Area
), 35 A Uc S
% Impervious` Area (total)
2 , O' I.
1._.M _,_�_ eras
Im oery'ous SurfeeAwrea
Ch-site Buildings
raua e Area -1
v mar r
O. A-) Acres
rai an QeAr 2
On -site Streets
o, Iq - . - - . A Ue-S
On -site Parking
O 6 o Acrns
On -site Sidewalks
0.01 Acre S
Other on -site
Off -site
�
Total:. � , 35 flu'�S � Total:
Impervious area is defined as the built upon area including, butnotlimited to, buildings, roads, parking areas,
sidewalks, gravel areas, etc. ��
Form SWU-101 Version 3.99
Page 2 of 4

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7. How was the off -site impervious area listed above derived? GAD D Mt0.5�tr^+a.
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
changed or deleted without the consent of the State.
2. No more than 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
construction.
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. 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 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

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 Regional Office.
Please indicate that you have provided the following required information by initialing in the space provided
next to each item.
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
Initials
TR t3
7R (3 G-' Oc; y)1' /
yrl.J�GxSI�, ��U:piiwtff�i
Yr— R B
Y R (3
- 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:
Phone:
VIII. APPLICANT'S CERTIFICATION
State:
Fax:
I, (print or type name ofperson listed in General Information, item 2) ..6 h SiiF Es
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 21-1 .1000. l
Iu
Date: /0
Form SWU-101 Version 3.99 Page 4 of 4

STORMWATER MANAGEMENT NARRATIVE
Harvey Point Defense Testing Activity RECEIVED
CTEC Facilities !14 ''� t'4 '4"(J
MAY - 3 2007
April 13, 2007 DWQ-WARD
This is a brief description of the drainage philosophy currently shown on the design
drawings. Stormwater management (85% TSS removal requirement) is achieved by the
use of the grass lined swales (35% TSS removal) and extended dry detention basin (50%
TSS removal). Both the `North Swale' and the `Pond' contain both of these features to
achieve a total of 85% TSS removal from both drainage areas. The outfall for the 'North
Swale' will be located just upstream from where the swale connects to an existing
drainage swale. The pond outlet control will create a 60 hour draw down time using a
1.25" orifice. The outfall for the `Pond' drainage area will be located within the island
created by the circular paved drive. This outfall control structure will have a 1.0" orifice
that will create a 62 hour draw down time for the 1" storm.
Small buildings that use to house trainees have been removed and the other two
remaining buildings will be renovated for the new user. A new shop and warehouse and
a hotel type structure will replace the former buildings. The surrounding adjacent area
has been declared wetlands and will not be disturbed with this project. The site area is
approximately 5.89 acres, with Approximately 3.3 acres being disturbed with new
construction. Approximately 2150 feet of sanitary sewer will be installed off -site.
The drainage plan for the CTEC facilities is relatively flat because the site and the
surroundings are very flat, with only 1 drainage outfall location for the disturbed area.
E&S is handled through a combination of seeding, mulching, top soiling, a construction
entrance and a sediment trap. The sediment trap achieves the required volume through the
use of the proposed permanent swale that surrounds the north and east sides of the site.
The proposed swale/sediment trap and construction entrance are required prior to any
land disturbance. The proposed swale outfalls into an existing swale that runs north from
the site approximately 400 feet to the Perquimans River.

DILQ/10ARO Fax:[phone] Jan 16 '07 10:39 P.02
Permit No.
(7'o be provided by DWO
State of North Carolina RECEIVED
Department of Environment and Natural Resources t t,l
Division of Water Quality MAY - 3 2007
STOR-NMATER MANAGEMENT PERMIT APPLICATION FORM
EXTENDED DRY DETENTION BASIN SIJPPLENIENT �INQ-INAR�
Thislo ",„ ,ay be aho:ocapled for use as a' original.
DWO Stormwater Management Plan Review:
A complete stormwater management plan submittal includes an extended dry detention basin supplement for
each basin, design calculations, plans and specification showing all basin and outlet structure details, and a
fully executed operation and maintenance agreement.
I. PROJECT INFORMATION (Please complete the following information):
Project Name: Hotrve 4PoH1 C7EL Facc�c�ieS
Contact Person: Saral T4 for Phone Number: 25 Z - 42 6 - S Z-L I
For projects with multiple basins, specify which basin this worksheet applies to: P" CSo�` A
Elevations
Bottom Elevation: 4-. 8 3 fmsl ? 6qoor of the basin)
Design Storage Elevation: 6. S o fmsl (elevation at which the total volume is provided.)
Sediment Storage Elevation: 5.01 finsl (elevation of the 20% sediment accumulation)
Areas
Drainage Area: 1.Zf g6,399 square feet
Built -upon Area: 1.11 or�96, 39a _square feet
Bottom Surface Area: ? zZ square feet
Design Storage Surface Area: �, Z4o square feet
(onsite and offsite drainage to the basin)
(onsite and offsite drainage to the basin)
(floor of the basin)
(the top of the 1 " plus sediment storage)
Volumes
Design Storm: 91 year-24 hour storm ® 1" (Please check only one box)
Required Design Volume: k 8 o•33 cubic feet (Based on chosen Design Storm)
Detention Volume Provided. I o, Zoo_ cubic feet (Total volume provided at the storage elevation)
Sediment Storage Provided: ),407 cubic feet (Equivalent to 20% of the detention volume)
Other Parameters
SHWT elevation: 4.1 fmsl
Drawdown Orifice Size: I inches feet (circle appropriate units)
3
Orifice Invert Elevation: '.Z S fmsl
Time to drawdowTt: 67 hours (<48 hours for 1 yr.-24 hr. storm, 2-5 days for I " storm.)
Proposed .Additional BMP to achieve 85% TSS (check one):
Grassed swale ❑Vegetated Filter ❑Other (Describe)
Form SWU-
Page 1 of 3

DlilO/WARO Fax:[phone] Jan 16 '07 10:39 P.03
777777777T777-
Permit No.
_ (Ta be provided by DWQ)
II. REQUIRED ITEMS CHECKLIST
The following checklist outlines design requirements per the latest version of the Stormwater Best
Management Practices Manual (N.C. Department of Environment and Natuial Resources) and Administrative
Section 15A NCAC 2H.1008.
Initial in the blank space provided in front of each item to indicate the following desieti requirements have
been met and supporting documentation is attached. if the applicant has designated an agent in the
Stortnwater Management Permit Application Fonn; the agent may initial below. If a requirement has not
been met, please attach written justification.
(Applicant or authorized agent- Please initial in the appropriate blanks, or mark the blank N/A if a
requirement does not apply)
NSA a. The basin captures the runoff from the 1 year, 24 hour storm and releases it over a period of 48
hours
b OR the basin captures the volume of runoff from the I inch storm and allows it to draw down over
a period of 2-5 days.
✓ c. The minimum flow length ratio is 3:1, L:W.
d. Basin sideslopes,are no steeper than 3:1.
e. A small permanent pool has been provided at the outlet to reduce clogging.
f. Cleanout access has been provided, sufficient for heavy equipment.
g. A drain has been provided which will completely. empty the basin for cleanout.
/ h. Sufficient volume has been provided to meet any local government peak flow requirements.
,/ i. If the basin was used during construction as a sediment basin or trap, it must be cleaned out to
design specifications prior to operation as a dry detention basin.
j. A vegetation plan has been prepared by a N.C. licensed professional. Consideration must be given
to the grasses specified due to the frequent inundation.
k. The basin must be stabilized within 14 days of construction.
1. The design provides for a sediment storage volume that is equal to 20% of the runoff detention
volume.
in. Inlet and outlet channels have been protected from scour during high flows from large storms.
Z n. In areas of easily erodible soils, an additional plunge pool at the inlet has been provided, or riprap
is used as an energy dissipator.
i g o. A forebay to capture sediment is provided to make cleanout easier.
p. The basin is located in uncompacted natural soils.
q. The seasonal high water table is located at least I foot below the bottom of the extended dry
detention basin.
r. An additional BMP has been designed to operate in conjunction with this dry detention basin to
meet the required minimum 85% TSS removal.
III. EXTENDED DRY DETENTION OPERATION AND MAINTENANCE AGREEMENT
The extended dry detention system is defined as the dry detention basin, forebay, and the required additional
BMP.
This system (check one) edoes does not incorporate a vegetated filter.
This system (check one) does does not incorporate non-integrated pretreatment.
At a minimum, the following maintenance activities shall be performed:
I. All grassed areas of the system shall be mowed at least twice annually, more frequently during the
summer months, as needed.
2. Monthly or after a runoff -producing rain event- inspect the system to make s� it is functionins
properly. Remove any accumulated debris from the system, outlet and orifice.
Form S«'U-
Page 2 of 3

DWG/WARD Fax:[phone] Jan 16 '07 10:59 P.04
Permit No.
(To be provided by DIVA)
3. Repair and revegetate any eroded side slopes and any erosion around the inlets and outlet immediately.
4. Check the depth of the system. If sediment has accumulated to the point that the volume has been
reduced to 75% of the original depth, it must be removed.
5. Inspect and repair the emergency spillway to keep in good working order
6. Remove woody vegetation from the banks of the system.
Any areas of the system found to be deficient shall be repaired or replaced to design standards
immediately.
Written records of the inspections and maintenance activities shall be kept on file. See the permit for
specific written record requirements.
I acknowledge and agree by my signature below that I am responsible for the performance of the above
operation and maintenance procedures for this extended dry detention system. I agree to notify DWQ of any
problems with the system or changes in the name of the project, responsible party, or address.
Print name: C f e q .'5H E EP-D Title: 1Dl (?
Address:_�j3,vj T)n /an— ArnA 4: t).
Phone
Date: s U
Note: The legally respon ' le shall notbe a homeowner's association unless more than 50% of the lots are sold,
or the developer no longer holds a majority vote, and a resident of the subdivision has been named the president.
a Notary Public for the State of
County of ? S
do hereby certify that
appeared
before me this the c�rJ day of Qprl 1 % and acknowledge the due
execution of the forgoing extended dry detention basin operation and maintenance agreement. Witness my
hand and official seal,
SEAT,
Notary Signature
My Commission expires a ap Izi
Form SWZT-_
Page 3 of 3

Reservior Drawdown Calculations
Project
Orifice
Q = CAA-(2gl-E"2
Quantity
1
Diameter
1 inch
Coefficient
0.61
Centerline Elevation
3.25
Area
0.005 sf
Countour
Area Incremental
Cumulative
Elevation
Volume
Volume
(sn (cf)
(cf)
4.8 1
5.0 ..... 2604
6.0 8934 -
6.5 9634
0
0
151
151
5454
5604
4641
10245
RECEIVED
MAY-�p32007
®WQ-WAR®
Head
Flow
At
Accumulated
Rate
t
(f)
(cfs)
(min)
(hr)
1.6
0.0
0
62
1.8
0.0
71
61
2.8
0.0
2053
27
3.3
0.0
1607
Hankins and Anderson, Inc. 4/13/2007 Page 1

l C e, C, ,
18 v YAM

DIWLIRRO Fax:[phone] Jan 16 '07 10:39 P.02
Permit No.
(7'o be provided by DWQ)
State of North Carolina RECEIVED
Department of Environment and Natural Resources C�
Division of Water Quality �I04Y lilt200�Y
STORMWATER MANAGEMENT PER-ti11T APPLICATION FORA4
EXTENDED DRY DETENTION BASIN SITPPUNIIENT DWQ_WARO
This Jornn c:ay loe p{:o:oco�i?d j' use as a» urigfnI
DWO Stormwater Management Plan Review:
A complete stormwater management plan submittal includes an extended dry detention basin supplement for
each basin, design calculations, plans and specification showing all basin and outlet structure details, and a
fully executed operation and ma ntenance agreement.
I. PROTECT INFORMATION (Please complete the following information):
Project Name: OQrve porr"t - GTEC Fac-,14 es
Contact Person: Sey,�, 'T0.._Lor Phone Number:
7-57- 47-6 - 5L2I
For projects with multiple basins, specify which basin this worksheet applies to: J �or l Sw4�
Elevations
Bottom Elevation: 3 .S v finsl> 2 (floor of the basin)
Design Storage Elevation: 6. o fmsl (elevation at which the total volume is provided.)
Sediment Storage Elevation: 3.9'L fmsl (elevation of the 20% sediment accumulation)
Areas
Drainage Area: 3• 1-2 c-16 I i S S square feet (onsite and offsite drainage to the basin)
Built -upon Area: 3e44ai i Sz, o-)q square feet (onsite and offsite drainage to the basin)
Bottom Surface Area: 36 3 1 square feet (floor of the basin)
Design Storage Surface Area: 14 oy 5 square feet (the top of the 1 " plus sediment storage)
Volumes
Design Storm:] 1 year-24 hour storm [�C 1" (Please check only one box)
Required Design Volume: ✓ 34+ cubic feet (Based on chosen Design Storm)
Detention Volume Provided. 1 oo 19 cubic feet ('Total volume provided at the storage elevation)
Sediment Storage Provided: 7-, 67 o cubic feet (.Equivalent to 20% of the detention volume)
Other Parameters
SHWT elevation: '2 fmsl
DrawdoNvn Orifice Size: 1.25 inche feet (circle appropriate units)
Orifice Invert Elevation: 2.; 3 fmsl
Time to drawdowat: 6 0 hours (<48 hours for 1 yr.-24 hr. storm, 2-5 days for I " storm.)
Proposed Additional BNIP to achieve 85% TSS (check one):
®Grassed swale ❑Vegetated Filter []Other (Describe)
Form SWU-
Page ] of')
a

0
c
.�
�
e.—:
..:
i
�. .
F �.
�r
�
N

DWQ/WRRD Fax:[phone] Jan 16 '07 1n:39 P.03
Permit No.
(To be prrnided by DWQ)
II. . REQUIRED ITEMS CHECKLIST
The following checklist outlines design requirements per the latest version of the Stormwater Best
Management Practices Manual (N.C. Department of Environment and Natufal Resources) and Administrative
Section 15A \TCAC 21-1.1008.
Initial in the blazil< space provided in front of each item to indicate the following design requirements have
been met and supporting documentation is attached. If he applicant has designated an agent in the
Stora-nvater Management Pemiit Application Form, the agent may initial below. If a requirement has not
been met, please attach written justification.
(Applicant' or authorized agent- Please initial in the appropriate blanks, or mark the blank N/A if a
requirement does not apply)
V
NIA a. The basin captures the runoff from the 1 year, 24 hour storm and releases it over a period of 48
hours
✓ b OR the basin captures the volume of runoff from the 1 inch storm and allows it to draw down over
a period of 2-5 days.
✓ c. The minimum flow length ratio is 3:I, L:W.
✓• d. Basin sideslopes are no steeper than 3:1.
e. A small permanent pool has been provided at the outlet to reduce clogging.
_/ f. Cleanout access has been provided, sufficient for heavy equipment.
A drain has been provided which will completely empty the basin for cleanout.
✓ h. Sufficient volume has been provided to meet any local government peak flow requirements.
i. If the basin was used during construction as a sediment basin or trap, it must be cleaned out to
design specifications prior to operation as a dry detention basin.
✓ j. A vegetation plan has been prepared by a N.C. licensed professional. Consideration must be given
to the grasses specified due to the frequent inundation.
✓ k. The basin must be stabilized within 14 days of construction.
,/ 1. The design provides for a sediment storage volume that is equal to 20% of the runoff detention
volume.
✓ in. Inlet and outlet channels have been protected from scour during high flows from large storms.
,/ n. In areas of easily erodible soils, an additional plunge pool at the inlet has been provided, or riprap
is used as an energy dissipator.
ti 1A o. A forebay to capture sediment is provided to make cleanout easier.
✓ p. The basin is located in uncompacted natural soils.
q. The seasonal high water table is located at least 1 foot below the bottom of the extended dry
detention basin.
r. An additional BMP has been designed to operate in conjunction with this dry detention basin to
meet the required minimum 85% TSS removal.
III. EXTENDED DRY DETENTION OPERATION AND MAINTENANCE AGREEMENT
The extended dry detention system is defined as the dry detention basin, forebay, and the required additional
BMP.
This system (check one) does does not incorporate a vegetated filter.
This system (check one) Bdoes does not incorporate non-integrated pretreatment.
At a minimum, the following maintenance activities shall be performed:
1. All grassed areas of the system shall be mowed at least twice annually, more frequently during the
summer months, as needed.
2. Monthly or alter a ruIloff-piodticing Iain event- inspect the System to make sure it is functioninS
properly. Remove any accumulated debris from the system, outlet and orifice.
Form 8WU-_
Page 2 of 3

DW AYAR0 Fax:[phone] Jan 16 '07 10:39 P.04
Permit No.
(To he provided by DiVo
Repair and revegetate any eroded side slopes and any erosion around the inlets and outlet immediately.
Check the depth of the system. If sediment has accumulated to the point that the volume has been
reduced to 75% of the original depth, it must be removed.
Inspect and repair the emergency spillway to keep in good working order.
6. Remove woody Vegetation from the banks of the system.
Any areas of the system found to be deficient shall be repaired or replaced to design standards
immediately.
Written records of the inspections and maintenance activities shall be kept on file. See the permit for
specific written record requirements.
I acknowledge and agree by my signature below that I am responsible for the performance of the above
operation and maintenance procedures for this extended dry detention system. I agree to notify DWQ of any
problems with the system or changes in the name of the project, responsible patty, or, address.
-Y
Print name: Q A 5 H��1ZL,5 Title: i P
Address:
Note: The legally responsi
or the developer no'
zo
4/,oxa
.patty shall notbe a homeowner's association unless more than 50% of the lots are sold,
ger holds.a majority vote, and a resident of the subdivision has been named the president.
a Notary Public for the State of
NorN , County of
do hereby certify that
appeared
before me this the day of Q Lf6 a Od and acknowledge the due
execution of the forgoing extended dry detention basin operation and maintenance agreement. Witness my
hand and official seal,
SEAT,
Notary Signature �� p
My Commission expires Q ���
Form S'VUT-
Page 3 of 3

Reservior Drawdown Calculations
Project
Orifice Q = C,A*(2gH)"
Quantity
1
Diameter
1.25 inch
Coefficient
0.61
Centerline Elevation
2.33
Arca
0.009 sf
Countour
Area Incremental
Cumulative
Elevation
Volume
Volume
(so (co
(ct)
1 0
0
3.5
40
2221 378
378
5.0 "
8074 4843
5221
6.0
14095 10946
16167
RECEIVED
(
MAY - 3 2007
DWQ-WARO
Head
Flow
At
Accumulated
Rate
t
(ft)
(cfs)
(min)
(hd
1.2
0.0
0
60
1.7
0.1
117
58
2.7
0.1
1184
38
3.7
0.1
2283
Hankins and Anderson, Inc. 4/13/2007 Page 1

Permit No.
(to be proWded by DWQ)
State of North Carolina
Department of Environment and Natural Resources
Division of Water Quality
STORMWATER MANAGEMENT PERMIT APPLICATION FOI l ry :��® EgVE'. 1R' 1 t:
CURB OUTLET SYSTEM SUPPLEMENT ` }�
FOR LOW DENSITY DGVELOPMI:N'r \NI'1'hl CURB AND GU'I"1'CR
This form may be photocopied for use as an original
DINQ-VUAR®
DWO Stormwater Management Plan Review'
A complete stormwater management plan submittal includes a stormwater management permit application, a
curb outlet system supplement, a low density supplement, design calculations, and plans and specifications
showing all stormwater conveyances and curb outlet details.
1. PROJECT INFORMATION
Project Name: fiovac4 P-1 4' — GTEL FaedJre5
Contact Person: Swcwl T4U v/ Phone Number. (2521 4Z6-5LZ1
Curb outlets to (check one): )K Swale 0 Vegetated Area
If. REQUIRED ITEMS CHECKLIST
The following checklist outlines design requirements per the North Carolina Administrative Code Section 15A
NCAC 21­1 .1008.
Initial in the space provided to indicate that the following design requirements have been met and supporting
documentation is attached. If the applicant has designated an agent on the Stormwater Management Permit
Application Form, the agent may initial below. If a requirement has not been met, attach justification.
Applicants initials
TrZR a. Curb outlets direct flow to a Swale or vegetated area.
TQR b. Swales or vegetated areas receiving curb outlet flow are designed to carry, at a minimum,
the peak flow from the 10-year stone.
TKR c. Flow velocity is non -erosive for peak flow from the 10-year storm event.
_M9 d. Longitudinal slope of the swale or vegetated area does not exceed 5%.
'TRt3 6. Side slopes of the swale or vegetated area are no steeper than 5:1 (horizontal to vertical).
_rR_% f. Length of swale or vegetated area is _> 100 feet.
'TRS g. The system takes into account the run-off at ultimate built -out potential from all surfaces
draining to the system (delineate drainage area for each swale).
71?8 h. Swales are located in recorded drainage casements.
TRR i. Grass type(s) for permanent vegetative cover specified on detail.
TR f3 j. Swale detail provided on plans.
Form SWU-I05 Ver 3.99 Page I of 3

III. DESIGN INFORMATION
Complete the following table. If additional space is needed the information should be provided in the same
format as Table I and attached to this form. Rainfall intensity data can be found in Appendix 8.03 of the State
of North Carolina Erosion and Sediment Control Planning and Design Manual.
Table I. Swale Dcsie,n Information
Swale No.
Drainage
Area ac
Impervious
Area ac
Grassed
Area ac
C
Q
efs
V,,,,—
(fps)
V,,,,,,,,
fps
Flow
Depth ft
1.10
044
0.6L
0.40
2A4
2.0
0.23
1.59
c
2.0Z
0.808
1.212
0.40
4.52
2.0
0.Z7
2.07
p
4,34-
2.' 8V
I.01S'3
0.55
10.79
Z.0
0.c0
2-•69
95
2.21
1.591
0.6101
0.7Z
11.01
Z.0
0.24
1.-7 -7
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
Form SWU-105 Ver 3.99 Page 2 of 3

Ill. CURB OUTLET SYSTEM MAINTENANCE REQUIREMENTS
Mowing will be accomplished as needed according to the season. Grass height will not exceed six inches
at any time.
2. Swales will be inspected monthly or aticr every runoff producing rainfall event for sediment build-up,
erosion, and trash accumulation.
Accumulated sediment and trash will be removed as necessary. Swales will be reseeded or sodded
following sediment removal.
Eroded areas of the swales will be repaired and reseeded. Swales will be revcgctatcd as needed and in a
timely manner based on the monthly inspections.
Catch basins, curb cuts, velocity reduction devices, and piping will be inspected monthly or after every
significant runoff producing rainfall event. Trash and debris will be cleared away from grates, curb cuts,
velocity reduction devices and piping.
Swales will not be altered, piped, or filled in without approval from NCDENR Division of Water Quality.
I acknowledge and agree by my signature below that I am responsible for the performance of the six
maintenance procedures listed above. 1 agree to notify DWQ of any problems with the system or prior to any
changes to the system or responsible party.
Print Name and
Date:
Signature:
Note: The legally responsible pa ty s uld not be a homeowners association unless more than 50% of the lots have been sold and a
resident of the snbdi tas been named the president.
I, 1 c -N V Vim.. (l-) , a Notary Public for the State of A • L , County of
t^MCvn do heerebbyC
y certify that _� �� Q�t'�rj personally appeared before me this i
day of _ R Pf! l , gam_, and acknowledge the due execution of the forgoing infiltration basin maintenance J
requirements. Witness my hand and official seal,
SEAL _ My commission expires,4 v
FormSWU-105 Ver3.99 Page 3of 3