SW8060249_CURRENT PERMIT_20060516

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

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May 16, 2006
Mr. Stephen T. Williams, Manager
Core Investors, LLC
318 inderia Mills Ct.
Winston Salem, NC 27101
NIiChacI P. 1=asley, GONTI-TIOr
William G. Koss Jr., Secretary
Nor,l, Carolina Department of Env Tunmeni and \°aural Resources
Subject: Stormwater Permit No. SW8 060249
Ness Commons Lots 1-3, Shopping Center and WilcoHess
High Density Subdivision Project
New Hanover County
Dear Mr. Williams:
Alan W. Klimek, P F. Director
Division of Water Quality
The Wilmington Regional Office received a complete Stormwater Management Permit
Application for Ness Commons, Lots 1-3, Shopping Center and WilcoHess on May 3, 2006.
Staff review of the plans and specifications has determined that the project, as proposed, will
comply with the Stormwater Regulations set forth in Title 15A NCAC 2H.1000. We are
forwarding Permit No. SW8 060249, dated May 16, 2006, for the construction of the project,
Ness Commons, Lots 1-3, Shopping Center and WilcoHess.
This permit shall be effective from the date of issuance until May 16, 2016, 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.
If you have any questions, or need additional information concerning this matter, please
contact Paul Bartlett, or me at [phone].
Sincerely;
Edward Beck
Regional Supervisor
Surface Water Protection Section
ENB/ptb: S:1WQSISTORMWATERIPERMIT1060249.may06
cc: Shane Lippard, P.E., Right Angle Engineering, P.C.
Tony Roberts, New Hanover County Inspections
City of Wilmington Stormwater Services
Beth E. Wetherill, New Hanover County Engineering
Paul T. Bartlett, P.E.
Wilmington Regional Office ,AAurally
Central I es
NoTib Carolina Division of Wafer Quality 127 Cardinal Drive Extension Wilmington, NC 25405 Phone [phone] Customer Service
Wiln,ington Regional Office Internel: Fax (M) 350-2004 1-877-623-07»$
An Eaual Opporlunity/Affirmative Action Employer - 50% Recycledl10% Post Consumer Paper

State Stormwater Management Systems
Permit No. SW8 060249
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
Stephen T. Williams and Core Investors, LLC
Ness Commons, Lots 1-3, Shopping Center and WilcoHess
New Hanover County
Zo]:M.1c
construction, operation and maintenance of a wet detention pond 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.
This permit shall be effective from the date of issuance until May 16, 2016 and shall be
subject to the following specified conditions and limitations:
This permit is effective only with respect to the nature and volume of stormwater
described in the application and other supporting data.
2. This stormwater system has been approved for the management of stormwater
runoff as described in Section 1.6 on page 3 of this permit. The subdivision is
permitted for 3 lots. Lots #1 and. #2 are each allowed 27,200 square feet of built -
upon area and Lot #3 is allowed 185,180 square feet of built -upon area.
3. Approved plans and specifications for this project are incorporated by reference
and are enforceable parts of the permit.
4. All stormwater collection and treatment systems must be located in either
dedicated common areas or recorded easements. The final plats for the project
will be recorded showing all such required easements, in accordance with the
approved plans.
Page 2of9

State Stormwater Management Systems
Permit No. SW8 060249
5. The following design elements have been permitted for this wet detention pond
stormwater facility, and must be provided in the system at all times.
a. Drainage Area, acres: 8.0
Onsite, ft2: 348,480
Offsite, ft2: None,
b. Total Impervious Surfaces, ft2: 240,000
OS Buildings, ft2: 29,000
Roads/Parking, ft2: 211,000
Offsite, ft2: None
C. Pond Depth, feet: 5.0
d. TSS removal efficiency: 90%
e. Design Storm: 1.0
f. Permanent Pool Elevation, FMSL: 29.0
g. Permitted Surface Area @PP, ft2: 18,500
h. Permitted Storage Volume, ft3: 20,768
i. Storage Elevation, FMSL:
j. Controlling Orifice:
k. Permanent Pool Volume, ft3
I. Forebay Volume, ft3:
m. Maximum Fountain Horsepower
n. Receiving Stream 1 River Basin:
o. Stream Index Number:
P. Classaication of Water Body:
II. SCHEDULE OF COMPLIANCE
1
2
30.0
2.0" O pipe
43,697
8,396
116
Ness Creek 1 Cape Fear
18-74-62
"C; Sw"
No homeowner/lot owner/developer shall fill in, alter, or pipe any drainage feature
(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.
The permittee is responsible for verifying that the proposed built -upon area for
the entire lot, including driveways and sidewalks, does not exceed the allowable
built -upon area. Once the lot transfer is complete, the built -upon area may not be
revised without approval from the Division of Water Quality, and responsibility for
meeting the built -upon area limit is transferred to the individual property owner.
Page 3of9

State Stormwater Management Systems
Permit No. SW8 060249
3. If an Architectural Review Board or Committee is required to review plans for
compliance with the BUA limit, the plans reviewed must include all proposed
built -upon area. Any approvals given by the Board do not relieve the homeowner
of the responsibility to maintain compliance with the permitted BUA limit.
4. 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 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, acquisition, or sale of all or part of the project area.
The project area is defined as all property owned by the permittee, for
which Sedimentation and Erosion Control Plan approval or a CAMA Major
permit was sought.
f. Filling in, altering, or piping of any vegetative conveyance shown on the
approved plan.
5. 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.
7. 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.
8. During construction, erosion shall be kept to a minimum and any eroded areas of
the system will be repaired immediately.
9. 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.
10. 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.
11. Permanent seeding requirements for the stormwater control must follow the
guidelines established in the North Carolina Erosion and Sediment Control
Planning and Design Manual.
Page 4 of 9

State Stormwater Management Systems
Permit No. SW8 060249
12. Prior to the sale of any lot, the following deed restrictions must be recorded:
a. The following covenants are intended to ensure ongoing compliance with
State Stormwater Management Permit Number SW8 060249, as issued
by the Division of Water Quality under NCAC 2H.1000.
b. The State of North Carolina is made a beneficiary of these covenants to
the extent necessary to maintain compliance with the Stormwater
Management Permit.
C. These covenants are to run with the land and be binding on all persons
and parties claiming under them.
d. The covenants pertaining to stormwater may not be altered or rescinded
without the express written consent of the State of North Carolina, Division
of Water Quality.
e. Alteration of the drainage as shown on the approved plans may not take
place without the concurrence of the Division of Water Quality.
The maximum built -upon area per lot is 27,200 square feet, Lots #1 and
#2 each, and 185,180 square feet, Lot #3. This allotted amount includes
any built -upon area constructed within the lot property boundaries, and
that portion of the right-of-way between the front lot line and the edge of
the pavement. Built upon area includes, but is not limited to, structures,
asphalt, concrete, gravel, brick, stone, slate, coquina and parking areas,
but does not include raised, open wood decking, or the water surface of
swimming pools.
g. Lots within CAMA's Area of Environmental Concern may be subject to a
reduction in their allowable built -upon area due to CAMA regulations.
h. All runoff from built upon area on the lot must drain into the permitted
system. This may be accomplished through providing roof drain gutters
which drain to the street, grading the lot to drain toward the street, or
grading perimeter swales and directing them into the pond or street. Lots
that will naturally drain into the system are not required to provide these
measures.
Built -upon area in excess of the permitted amount will require a permit
modification.
Each lot within the subdivision whose ownership is not retained by the
permittee, must submit a separate Offsite Stormwater Management Permit
application package to the Division of Water Quality and receive a permit
prior to any construction on the lot.
13. A copy of the recorded deed restrictions must be submitted to the Division within
30 days of the date of recording the plat, and prior to selling lots. The recorded
copy must contain all of the statements above, the signature of the Permittee, the
deed book number and page, and the stamp/signature of the Register of Deeds.
Page 5 of 9

State Stormwater Management Systems
Permit No, SW8 060249
14. Decorative spray fountains will be allowed in the stormwater treatment system,
subject to the following criteria:
a. The fountain must draw its water from less than 2' below the permanent
pool surface.
b. Separated units, where the nozzle, pump and intake are connected by
tubing, may be used only if they draw water from the surface in the deepest
part of the pond.
c. The falling water from the fountain must be centered in the pond, away from
the shoreline.
d_ The maximum horsepower for the fountain's pump is based on the
permanent pool volume. The maximum pump power for a fountain in this
pond is 1 /6.
15. Prior to transfer of the permit, the stormwater facilities will be inspected by DWQ
personnel. The facility must be in compliance with all permit conditions. Any
items not in compliance must be repaired or replaced to design condition prior to
the transfer. Records of maintenance activities performed to date will be
required.
16. The permittee shall at all times provide the operation and maintenance
necessary to assure that all components of the permitted stormwater system
function at optimum efficiency. The approved Operation and Maintenance Plan
must be followed in its entirety and maintenance must occur at the scheduled
intervals including, but not limited to:
a. Semiannual scheduled inspections (every 6 months).
b. Sediment removal.
C. Mowing and revegetation of 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 structures, orifice, catch basins and
piping.
g. Access to all components of the system must be available at all times.
17. 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.
18. 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.
19. Built upon area includes, but is not limited to, structures, asphalt, concrete,
gravel, brick, stone, slate, coquina. and parking areas, but does not include
raised, open wood decking, or the water surface of swimming pools.
Ili. GENERAL CONDITIONS
This permit is not transferable to any person or entity except after notice to and
approval by the Director. In the event there is either a desire for the facilities to
change ownership, or there is a name change of the Permittee, a
"Name/Ownership Change Form" must be submitted to the Division of Water
Quality accompanied by appropriate documentation from the parties involved.
This may include, but is not limited to, a deed of trust, recorded deed restrictions,
Designer's Certification and a signed Operation and Maintenance plan. The
project must be in good standing with DWQ. The approval of this request will be
considered on its merits and may or may not be approved.
Page 6 of 9

State Stormwater Management Systems
Permit No. SW8 060249
2. The permittee is responsible for compliance with all of the terms and conditions
of this permit until such time as the Director approves the transfer request.
3. 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.
4. 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.
5. 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.
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. Permittee grants permission to staff of the DWQ to access the property for the
purposes of inspecting the stormwater facilities during normal business hours.
8. The permittee shall notify the Division of any name, ownership or mailing address
changes within 30 days.
9. A copy of the approved plans and specifications shall be maintained on file by
the Permittee for a minimum of ten years from the date of the completion of
construction.
Permit issued this the 16 day of May 2006.
NORTH-CAROLINA ENVIRONMENTAL MANAGEMENT COMMISSION
torAian vv. KiimeK, H.L., Uirector
Division of Water Quality
By Authority of the Environmental Management Commission
Permit Number SW8 060249
Page 7of9

State Stormwater Management Systems
Permit No. SW8 060249
Page 1 of 2
Ness Commons, Lots 1-3, Shopping Center and WilcoHess
Stormwater Permit No. SW8 060249
New Hanover Countv
Designer's Certification
I, , as a duly registered in
the State of North Carolina, having been authorized to observe (period icallylweeklylfull
time) the construction of the project,
(Project)
for (Project Owner) hereby state that, to the
best of my abilities, due care and diligence was used in the observation of the project
construction such that the construction was observed to be built within substantial
compliance and intent of the approved plans and specifications.
The checklist of items on page 2 of this form are a part of this Certification.
Noted deviations from approved plans and specifications:
Signature
Registration Number
Date
SEAL
Page 8 of 9

State Stormwater Management Systems
Permit No. SW8 060249
Certification Requirements: Page 2 of 2
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 outlet/bypass structure elevations are per the approved plan.
6. The outlet structure is located per the approved plans.
7. 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. Required drawdown devices are correctly sized per the approved plans.
13. All required design depths are provided.
14. All required parts of the system are provided, such as a vegetated shelf, a
forebay, and the vegetated filter.
15. The required dimensions of the system are provided, per the approved
plan.
cc: NCDENR-DWQ Regional Office
Tony Roberts, New Hanover County Building Inspections
Page 9 of 9

OFFICE USE ONLY
Date Received
Fee Paid
Permit Number
�—
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
1. GENERAL INFORMATION
1. Applicants name (specify the name of the corporation, individual, etc. who owns the project):
Core Investors, LLC
2. Print Owner/Signing Official's name and title (person legally responsible for facility and compliance):
S�0-V e, W ;11', S Nla ,, d,- o —
3_ Mailing address for person Iisted in item 2 above:
318 Inderia Mills Ct
City: Winston Salem State: NC
Telephone Number. 336 - 722-1986
.Zip: 27101
4. Project Name (subdivision, facility or establishment name— should be consistent with project name on
plans, specifications, letters, operation and maintenance agreements, etc.):
Shopping Center and WilcoHess Gas and C-store
Lot 3 Ness Commons
5. Location of Project (street address):
2821 Castle Hayne road
City: Wilmington County: New Hanover
6. Directions to project (from nearest major intersection):
Castle Hayne road north 2000 feet from Kerr Avenue on the west side of Castle Hayne Road.
7. Latitude: 34.2957*
Longitude
77.9219*
8. Contact person who can answer questions about the project:
of project
Name: Shane Lippard, PE Telephone Number: 910 - 251-8544
H. PERMIT INFORMATION
1. Specify whether project is (check one)
® New ❑ Renewal ❑ Modification
Form SWU-101 Page 1 of
i

3/24-r, 11--e- �& e(. - , � - z 3 C-0E3 06c 21-
2. If this application is being submitted as the result of a renewal or modification to an existing pennit, list the
Existing permit number _ and its issue date (if known)
3. Specify the type of project (check one):
❑1_.ow Density ®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 pen -nits 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 stomiwater will be treated. Also attach a detailed narrative
(one to two pages) describing stormwater management for the project.
The impervious areas will drain to a wet detention pond and then outfall to an existing ditch at the
rear of the property
2. Stormwater runoff from this project drains to the Cape Fear
River Basin.
3. Total Project Area. 8.0 acres 4. Project Built Upon Area: 69 %.
S. How many drainage areas does the project have? � I
6. Complete the following information for each drainage area. If there are more than two drainage area in the
project, attach an additional sheet with the information for each are provided in the same format as below.
$asin Information '
-Draina e Area 1
-Draina e Area 2
Receiving Stream Name
Ne :Ss Cc ee
Receiving Stream Class
C-SW
Drainage Area
8.0
Existina Impervious * Area
0
Proposed Impervious * Area
I Pqo 000 334; SF
% Impervious * Area total
69
_Impervious *-Surface Area
,Draina e.Area `i
-Drainage Area 2
-On-site-B"din s ._ -- -
29, 000 -SF'
On -site Streets
On -site Parking
2t qpo F
On -site Sidewalks
Other on -site
Off -site
Total: a Oaba398&SF
Total:
*Inzpen;ious area is defined as the built upon area including, but not limited to, buildings, roads, parking areas,
sidewalks, gravel area, etc.
Form SWU-101 Version 3.99 Page 2 of

7. How was the off -site impervious area listed above derived? N/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 storntwater lnanagernent permit
number as issued by the Division of tVater Quality. These covenants may
not be changed or deleted without the consent of the State.
2. No more than 239,580 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 e-rcept as necessai), to provide driveway crossing.
4. Built -Upon area in excess of the permitted amount requires a state stornwater management permit 1nodification prior to
construction.
5. All pernitted runoff from outparcels or future development shall be directed into the permitted stornnwater control
system. These connections to the storntwater 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.
Fonn SWU-102
Wet Detention Basin Supplement
Form SWU-103
Low Density 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
Fomi SWU-101 Version 3.99 Page 3 of 4

V1. SUBMITTAL REQUIREMENTS
Only complete application packages will be acepted 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.
i . 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 LoSL
• One copy of the applicable Supplement Forms(s) for each BMP J'0 L
• Permit application processing fee of $420 (payable to NCDENR) USL
• Detailed narrative description of stormwater treat men tlmanagement
• Two copies of plans and specifications, including: 1lJSl�
-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 elevation, 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)
VI1. AGENT AUTHORIZTION
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): Shane Lippard - Right Angle Engineering
Mailing Address: 212 Princess Street
City: Wilmi
Phone: [phone]
Vlll. APPLICANT'S CERTIFICATION
State: NC
Fax: [phone]
Zip
28401
I (print or type name o erson listed in General Information, item 254f ]�,rf.� c
iP YP .iP f i � 1T W �L'J
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 covenaT ill be recorded, and that the proposed project complies with the requirements of 15A
NCAC 2H.1000. /7 / %% -17
Signature: ��� L�y C/ v Date:
Form SWU-101 Version 3.99 Page 4 of 4

;-7,1Z7j -00, - /
No,
(to be provided b DWQ)
State; of Noma Carolina
Department of Environment and Natural Resources
Division of Water Quality
STOR.MWATER MANAGEMENT PERMIT APPLICATION FORM
WET DETENTION BASIN SUPPLENIENT
This form may be photocopied for tre as an anginal
DWQ Stormwater Management Plan Review:
A complete stormwater management plan submittal includes an application force, a wet deterntion Basin
supplement for eeaccli basin, design calculations, and plans and specifications slowing all basin and outlet
structure details.
x_ PROJECT MFORl4UMN
project Name: Lot; 3 Ness Commons - Wi lcoHess C-Store
Contact Person_ ��.. � [- -s Phom Nuuaber
For projects with multiple basins, specify which basin this worksheet applies to:
ele w-zdons
Basin Bottom. Elevation
Permanent Pool Elevation
Temporary Pool Elevation
areas
Pennaneut Pool Surface Area
Drainage Area
Impervious Area
fL
2q.n ft
3 0 - 0 ft.
18, s`ao 6�
sq- f-
R _ 0 ac.
5-5 ac-
volumes _
li'e�at Pool Volume � 3 !o `� 7�
Temporary Pool Volume ZO ,,�_ cu_ fE
Forebay Volume $3 9 (p cu. ft
Other parameters
(floor of the basin) $ _ b-1-e .H
(elevcnt on of the or#7e e)
(elev=on of the disclicu-ge she overflow)
(water surface area at the orifice elevr260n)
(on -site and off site drainage to the basin)
(on site 412d off -site 6 ainage to the basin)
(combined volume of mam basin mil forebay)
(volume detained above the permanent pool)
(approximately 20% of total vohtme)
SAIDA 1 5-0 (su))ace area to dr amgge area ratio from DWQ table)
Diameter of Ozifice 2.0 _ in. (2 to .5 day ternl,;,orary pool draw -dowry required)
Design lta.infall 1.0 in.
Desiga TSS Removal 2 90 % (minimum 8-5%required]
Form SWU-102 Rev 3.99 Page l of 4

Footnotes:
t When using the Division SA/DA tables, the correct SA/DA ratio for permanent pool sizing should be computed based upon the
actual impervious % and permanent pool depth. Linear interpolation should be employed to determine the correct value for non-
standard table entries.
In the 20 coastal counties, the requirement for a vegetative filter may be waived if the wet detention basin is designed to provide
90% TSS removal. The NCDENR BMP manual provides design tables for both 85% TSS removal and 90% TSS removal.
II. REQUIRED ITEMS CHECKLIST
The following checklist outlines design requirements per the Stormwater Best Management Practices Manual
(N.C. Department of Environment, Health and Natural Resources, February 1999) and Administrative Code
Section: 15 A NCAC 2H .1008.
Initial in the space provided to indicate the following design requirements have been met and supporting
documentation is attached. If the applicant has designated an agent in the Stormwater Management Permit
Application Form, the agent may initial below. If a requirement has not been met, attach justification.
Applicants Initials
(,,)5L- a. The permanent pool depth is between 3 and 6 feet (required minimum of 3 feet).
—ESL b. The forebay volume is approximately equal to 20% of the basin volume.
05c- c. The temporary pool controls runoff from the design storm event.
USQ d. The temporary pool draws down in 2 to 5 days.
4lL 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.
L g. The basin side slopes above the permanent pool are no steeper than 3:1.
h. A submerged and vegetated perimeter shelf with a slope of 6:1 or less (show detail).
i. Vegetative cover above the permanent pool elevation is specified.
1.1j. A trash rack or similar device is provided for both the overflow and orifice.
L k. A recorded drainage easement is provided for each basin including access to nearest right-
of-way.
SL 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.
i►m. A mechanism is specified which will drain the basin for maintenance or an emergency.
III. WET 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 10 does not incorporate a vegetated filter at the outlet.
This system (check ogre) 0 does V does not incorporate pretreatment other than a forebay.
Form SWU-102 Rev 3.99 Page 2 of 4

Maintenance activities shall be perforrned as follows:
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 occurs within
2 to 5 days as designed.
2. Repair- eroded areas immediately, re -seed as necessary to maintain good vegetative cover, niow vegetative
cover to nia.intain a maximum height of six inches, and remove trash as needed.
I Inspect and repair the collection system (i.e. catch basins, piping, swales, riprap, etc.) quarterly to maintain
proper functioning.
4. Remove accumulated sediment from the wet detention basic system semi-annually or when depth is
reduced to 75% of the original design depth (see diagram below). Removed sediment shall be disposed of
m an appropriate manner and shall be handled na a manner that will not adversely impact water quality (i.e.
stockpiling near a wet detention basin or stxeazm, 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
When the permanent pool depth reads
Sediment
V
�o,al EI_-- 2525'175�
Sediment Removal Elevation -If; _ 2 5 "
3 . 75 f t in. the main pond, the sediment shall be removed.
3 - 7 5 feet in the forebay, the sediment shall be removed
BASVq DLAGRAM
(fill in the bIw9a)
Bottom Ele\ation 34 -
FOREBAY
Permanent Pool Elevation 2 9 - 0
75%
Bottom Elevatiou 24 -0 4 25°%
MAIN POND
5. Remove cattails and other indigenous wetland plants when they cover 50% of the basin surface. These
plaaAs 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 through
the emergency drain shall be minimized to the maximum extent practical.
Form SWU-1Q2 Rev 3.99 Pagc 3 of

7. All components of the wet detention basin system shall be maintained in good working order.
I acknowledge and agree by my signature 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:
6.... -T. WIILL tWY14.S
Title: 4?-4e5 tae4.l _
Address: 541(o 04the-oLS iry Pk6w W %� 5TV-m 5*ceV(- Li l O 57
Phone: 33► C. - 7 fo 7 — 6 Z
Signature:
Date: /L -1 Z ,a 5�-
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.
a Notary Public for the State of r 1; n
County of p� �� , do hereby certify that S�e���,-� �. ,�� tQ m
personally appeared before me this ��_ day ofIlgepr-n-% r , aDDS , and acknowledge the due
execution of the forgoing wet detention basin maintenance requirements. Witness my hand and official seal,
OFFICIAL SEAL
SHERRY D. POOLEY
NOTARY PUBLIC -NORTH CAROLINA
COUNTY OF FORSYM
PAY Commission Expires duly 2, 2006
SEAL
My commission expires --7-- a�
Form SWU-102 Rev 3.99 Page 4 of