SW8050242_CURRENT PERMIT_20060110

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

��F W A T�,qQ Michael F. Easley, Governor
�O G William G. Ross, Jr., Secretary
7 North Carolina Department of Environment and Natural Resources
Alan W. Klimek, P.E. Director
Division of Water Quality
January 10, 2006
Mr. William L. Smith, President
Westpark Plaza, Inc.
PO Box 749
Supply, NC 28462
Subject: Stormwater Permit No. SW8 050242
Westpark Plaza
High Density Subdivision Project
Brunswick County
Dear Mr. Smith:
The Wilmington Regional Office received a complete Stormwater Management Permit
Application for Westpark Plaza on December 14, 2005. 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 050242,
dated January 10, 2006, for the construction of the project, Westpark Plaza.
This permit shall be effective from the date of issuance until January 10, 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 sixty (60) 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 Linda Lewis, or me at [phone].
Sincer ,
E YwardeBeck
Regional Supervisor
Surface Water Protection Section
ENB/arl: S:1WQSISTORMWATIPERMIT1050242.jan06
cc: Richard Collier, P.E., McKim & Creed
Delaney Aycock, Brunswick County Inspections
Linda Lewis '
Wilmington Regional Office
Central Files
North Carolina Division of Water Quality 127 Cardinal Drive Extension Phone [phone] Customer Service1-877-623-6748
Wilmington Regional Office Wilmington, NC 28405-3845 FAX [phone] Internet: h2o.enr.state.nc.us One
NorthCarolina
An Equal Opportunity/Affirmative Action Employer— 50% Recycled110°% Post Consumer Paper ;Vatdlrull f

State Stormwater Management Systems
Permit No. SW8 050242
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
William L. Smith & Westpark Plaza, Inc.
Westpark Plaza
US 17 N, 1.5 miles south of Shallotte, Brunswick County
FOR THE
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 January 10, 2016 and shall
be subject'to the following specified conditions and limitations:
1. DESIGN STANDARDS
1. This permit is effective only with respect to the nature and volume of stormwater
described in the application and other supporting data.
2. This stormwater system has been approved for the management of stormwater
runoff as described in Section 1.5 on page 3 of this permit. The subdivision is
permitted for 7 lots, each allowed a maximum amount of built -upon area as
described in Section 11.12 of this permit.
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 2 of 9

State Stormwater Management Systems
Permit No. SW8 050242
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:
23.0
Onsite, ft2:
1,001,880
Offsite, ft2:
0
b. Total Impervious Surfaces, ft2:
851,598
7 Lots, ft :
763,768
Roads/Parking, ft2:
67,937
Sidewalk, ft2:
18,048
Pump Station, ft2:
1,845
c. Pond Depth, feet: 6.0
d. TSS removal efficiency: 90%
e. Design Storm: 1
f.
Permanent Pool Elevation, FMSL:
14.5
g.
Permitted Surface Area @PP, ft2:
78,400
h.
Permitted Storage Volume, ft3:
167,562
i.
Storage Elevation, FMSL:
16.5
j.
Controlling Orifice:
4.0" O pipe
k.
Permanent Pool Volume, ft3:
375,699
I.
Forebay Volume, ft3:
75,140
m.
Maximum Fountain Horsepower:
1
n.
Receiving Stream / River Basin:
Shallotte River / Lumber
o.
Stream Index Number:
15-25-2-(7.5)
p.
Classification of Water Body:
"SC HQW"
11. SCHEDULE
OF COMPLIANCE
1. 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.
2. 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 3 of 9

State Stormwater Management Systems
Permit No. SW8 050242
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 050242
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 050242, 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.
f. The maximum built -upon area per lot, in square feet, is as listed below:
Lot 1
105,743
Lot 5
93,464
Lot 2
76,106
Lot 6
9,380
Lot 3
76,262
Lot 7
239,291
Lot 4
79,422
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 the built -upon areas on the lot must drain into the permitted
system. This may be accomplished by 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 050242'
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 HP.
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.
III. 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 wi 11 be
considered on its merits and may or may not be approved.
Page 6of9

State Stormwater Management Systems
Permit No. SW8 050242
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 10th day of January 2006.
NORTH CAROLINA ENVIRONMENTAL MANAGEMENT COMMISSION
2'tlL
{or Alan W. Klimek, P.E., Director
Division of Water Quality
By Authority of the Environmental Management Commission
Permit Number SW8 050242
Page 7 of 9

State Stormwater Management. Systems
Permit No. SW8 050242'
Westpark Plaza Page 1 of 2
Stormwater Permit No. SW8 050242
Brunswick County
Designer's Certification
I, , as a duly registered in
the State of North Carolina, having been authorized to observe (period icallylweekly/full
time) the construction of the project,
(Project)
for (Project Owner) hereby state that, to the
best of my abilities, due care and diligence was used in the observation of the project
construction such that the construction was observed to be built within substantial
compliance and intent of the approved plans and specifications.
The checklist of items on page 2 of this form are a part of this Certification.
Noted deviations from approved plans and specifications:
Signature
Registration Number
Date
SEAL
Page 8of9

State Stormwater Management Systems
Permit No. SW8 050242
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
Delaney Aycock, Brunswick County Building Inspections
Page 9 of 9

OFFICE USE ONLY
State of North Carolina
Department of Environment and Natural Resources
Division of Water Quality
STORNIWATER MANAGEMENT PERMIT APPLICATION FORM
This form may be photocopied for use as an original
I. GENERAI, INFORMATION:
1. Applicant's name (specify the name of the corporation, individual, etc. who owns the project):
Westnark Plaza. Inc.
2. Print Owners/Signing Official's name and title (the person legally responsible for facility and compliance):
William L. Smith, President
3. Mailing Address for person listed in item 2 above:
'P.O. Box 749
City: Supply State:
Telephone Number: [phone]
NC
Zip: 28462
4. Project Name (subdivision, facility, or establishment name - should be consistent with project name on
plans, specifications, letters, operation and maintenance agreements, etc.):
Weswark Plaza
5. Location of Project (street address):
NIA
City: Shallotte
County: Brunswick
6. Directions to project (from nearest major intersection):
From Shallotte take US Hwy 17 South approximately 1.5 miles, The project site is on the South side of
US 17, just east of St. Brendian Mission.
7. Latitude: 033 57'23.89"N Longitude: 078 25' 44.36"W of project
8. Contact person who can answer questions about the project:
Name: Richard Collier. PE
IL PERMIT INFORMATION:
I . Specify whether project is (check one)
X New
Telephone Number:
Renewal
10) 343-1048
Modification
Form: SWU-101 Version 3.99 Page 1 of

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 X High Density Redevelop _General Permit Other
4. Additional Project Requirements (check applicable blanks):
CAMA Major X Sediment/Erosion Control 404/401 Permit _NPDES Stormwater
Information on required state permits can be obtained by contacting the Customer Service Center
at 1-877-623-6748.
III. PROJECT INFORMATION
1. In the space provided below, summarize how stormwater will be treated. Also attach a detailed narrative (one
to two pages) describing stormwater management for the project.
Stormwater treatment will be provided through the use of overland flow, swales, and a wet detention pond.
2. Stormwater runoff from this project drains to the
3. Total Project Area: 23 acres
5. How many drainage areas does the project have?
Lumber River basin.
4. Project Built Upon Area:
I
85 %
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.
B' Informatio
asinn
Trea tme nt'°P1antSife.�Drairia
Receiving Stream Name
Shallotte River
Receiving Stream Class
SC,H W
Drainage Area
23 acres
Impervious* Area
0
—Existing
Proposed Impervious* Area
19.55 acres
% Impervious* Area (total)
85%
lin"ervious* Surface.Area ;
Diaina a Basin ` '
Drama
Paved Road
67,937 sf
Cone. Walk
19,048 sf
Gravel Pump Sta. Site
1,845 sf
Future Impervious
763,768 sf
Off site
0 sf
Total:
851,598 sf
* Impervious area is defined as the built upon area including, but not limited to, buildings, roads,
parking areas, sidewalks, gravel areas, etc.
Form: SWU-101 Version 3.99 Page 2 of 4

7. How was the off -site impervious area listed derived?
N/A
IV. DEED RESTRICTIONS AND PROTECTIVE COVENANT'S
The following italicized deed restrictions and protective covenants are required to be recorded for all
subdivisions, out parcels and future development prior to 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.
The following covenants are intended to ensure ongoing compliance with state management permit
number as issued by the Division of Water Quality. These
covenants my 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 runofffrom out parcels 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 item 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 k Initials
• 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 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)
VI. 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:
243 North Front St.
McKim & Creed
City: Wilmington State: NC
Phone: [phone]
VIII. APPLICANT'S CERTIFICATION
Fax: [phone]
Zip: 28401
1, (print or type name of person listed in General Information, itent 2) William L. Smith
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 confo ce with the approved plans, that the required deed restrictions
and protective c venant ill be recor a d that t e proposed project complies with the requirements of
15A NCAC 0� k 165;;,
Signature: Date:
Form; SWU-101 Version 3.99 Page 4 of

Revised 9/23/05
Permit No. `J 90 50 Z R-
(to be provided by DWQ)
State of North Carolina
Department of Environment and Natural Resources
Division of Water Quality
.STORMWATER MANAGEMENT PERMIT APPLICATION FORM
WET DETENTION BASIN SUPPLEMENT
This form may be photocopied for use as an original
DWQ Stormwater Management Plan Review:
A complete stormwater management plan submittal includes a wet detention basin supplement for each basin,
design calculations, plans and specifications 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: Westpark Plaza
Contact Person: Richard Collier, PE Phone Number: [phone]
For project with multiple basins, specify which basin this worksheet applies to: 1
Elevations
Basin Bottom Elevation
Permanent Pool Elevation
Temporary Pool Elevation
Area
Permanent Pool Surface Area
Drainage Area
Impervious Area
Volumes
Permanent Pool Volume
Temporary Pool Volume
Forebay Volume
Other parameters
SA/DA
Diameter of Orifice
Design Rainfall
Design TSS Removal 2
8.50 ft. (floor of the basin)
14.50 ft. (elevation of the orifice)
16.50 ft. (elevation of the discharge structure overflow)
78,400 sq. ft. (water surface area at the orifice elevation)
23 ac. (on -site and off -site drainage to the basin)
19.55 ac. (on -site and off -site drainage to the basin)
375,699 cu. ft. (combined volume of main basin and forebay)
165,880 cu. ft. (volume detained above the permanent pool)
75,140 cu. ft. (approximately 20% of total volume)
4.9 (swface area to drainage area ratio f-om DWQ table)
4 in. (2 to 5 day temporary pool draw -down required)
1 in.
90 % (ininimuna 85% required)
Form: S WU-102 Rev. 3.99 Pagel of 4

Fbotnotes:
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.
Z The requirement for a vegetative filter may be waived if the wet detention basin is designed to meet 90% TSS removal.
11. 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, November 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
a. The permanent pool depth is between 3 and 6 feet (required minimum of 3 feet).
b. The forebay volume is approximately equal to 20% of the basin volume.
c. The temporary pool controls runoff from the design storm event.
WC d. The temporary pool draws down in 2 to 5 days.
e. If required, a 30-foot vegetative filter is provided at the outlet (include non -erosive flow
to calculations)
%MG f. The basin length to width ratio is greater than 3:1.
g. The basin side slopes above the permanent pool are no steeper than 3:1.
i 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.
"Ymf j. A trash rack or similar device is provided for both the overflow and orifice.
k. A recorded drainage casement is provided for each basin including access to nearest
right-of-way.
1. If the basin is used for sediment and erosion control during construction, clean out of
the basin is specified prior to use a wet detention basin.
m. A mechanism is specified which will drain the basin for maintenance or an emergency.
I11. 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) (❑) does (®) does not incorporate a vegetated filter at the outlet.
This system (check one) (❑) does (®) does not incorporate pretreatment other than a forebay.
Form: SWU-102 Rev. 3.99 Page 2 of 4

Revised 9/23/05
This system (check one) (❑} does (®) does not incorporate a vegetated filter at the outlet.
This system (check one) (❑) does (®) does not incorporate pretreatment other than a forebay.
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 occurs
within 2 to 5 days as designed.
2. Repair eroded areas immediately; re -seed as necessary to maintain good vegetative cover, now
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 basins, piping, swales, riprap, 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 4_5 feet in the main pond, the sediment shall be removed.
When the permanent pool depth reads 4.5 feet in the fore bay, the sediment shall be removed.
Sediment RemovahEI. 10.0 1 2.0
Bottom Elevation\ 8.5
FOREBAY
BASIN DIAGRAM
011 in the blanks)
Permanent Pool Elevation 14.50
Sediment Removal Elevation 10.0 2.0
Bottom Elevation 8.5 4.0
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 fore bay 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.
7. All components of the wet detention basin system shall be maintained in good working order.
Form: SW U-102 Rev. 3.99 Page 3 of 4

} 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: William L. Smith
Title: President
Address: P.o. Box 749 Supply, NC
Phone:
Signatu
Date: V I 'LZ jo-)
Note: The legally responsible party should not be a homeowners association unless more than 50% of the lots
have been sold and a resident of the subdivision has been named the president.
I, It � L ( e ,X I ---, A, j , a Notary Public for the State of No r-'- k Car
County of N P—U) L , do hereby certify that ��t i ct wi L
personally appeared before me this c �"ay of c Lt IUD , 20Q5, and acknowledge the due
execution of the foregoing wet detention basin maintenance requirements. Witness my hand and official seal,
SEAL
My commission expires
Form: SWU-102 Rev. 3.99 Page 4 of 4