SW8020709_CURRENT PERMIT_20030403

STORMWATER DIVISION CODING SHEET
POST -CONSTRUCTION PERMITS
PERMIT NO.
DOC TYPE URRENT PERMIT
rAPPROVED
PLANS
❑ HISTORICAL FILE
❑ COMPLIANCE EVALUATION INSPECTION
DOC DATE
WWMMDD

,�- W A T6n
C
Mr. Todd Leber, Vice President
T. Leber Corporation
7202 Farrington Farnis Drive
Wilmington, NC 28411
Dear Mr. Leber:
Michael F. Easley, Governor
William G. Ross, Jr., Secretary
North Carolina Department of Environment and Natural Resources
Alan W. Klimek, P.E., Director
Division of Water Quality
Wilmington Regional Office
April 3, 2003
Subject: Permit No. SWS 020709
The Preserve
High Density Subdivision Stormwater Project
New Hanover County
The Wilmington Regional Office received a complete Stormwater Management Permit
Application for The Preserve on March 27, 2003. 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 020709, dated April 3,
2003, for the construction of the project, The Preserve.
This permit shall be effective from the date of issuance until April 3, 2013, 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 pails, 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 1 SOB 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].
Sincerely,
Rick Shiver
Water Quality Regional Supervisor
RSS/:arl S:1WQSISTORMWATIPERMIT1020709.APR03
cc: Phil Tripp, P.E.
Tony Roberts, New Hanover County Inspections
Beth E. Wetherill, New Hanover County Engineering
Linda Lewis
Wilmington Regional Office
Central Files
"A
14CDENR
N.C. Division of Water Quality 127 Cardinal Drive Extension Wilmington, N.C. 28405 [phone] Fax [phone] Customer Service
800-623-7748

State Storrivvater Management Systems
Permit No. SWS 020709
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
Todd Leber, T. Leber Corporation
The Preserve
New Hanover County
FOR THE
construction, operation and maintenance of 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 pen -nit shall be effective from the date of issuance until April 3, 2013 and shall be subject to
the following specified conditions and Iimitations:
I. DESIGN STANDARDS
This permit is effective only with respect to the nature and volume of stormwater
described in the application and other supporting data.
This stormwater system has been approved for the management of stormwater runoff as
described on page 3 of this permit, the Project Data Sheet. The subdivision is permitted
for 10 lots, each allowed 4,500 square feet of built -upon area.
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.
5. The runoff from the built -upon areas on each lot must be directed into the stormwater
collection system. The lot must be graded to drain from back to front.
2

r
State Storrivvater Management Systems
Permit No. SW8 020709
DIVISION OF WATER QUALITY
PROJECT DATA SHEET
Project Name: The Preserve
Pennit Number: SW8 020709
Location: New Hanover County
Applicant: Mr. Todd Leber, Vice President
Mailing Address: T. Leber Corporation
7202 Farrington Farms Drive
Wilmington, NC 28411
Application Date:
March 27, 2003
River Basin / Receiving Stream :
Cape Fear / Bradley Creek
Index Number:
CPF24 18-87-24-4-(1)
Classification of Water Body:
"SC HQW #"
Design Storm:
1.0"
Drainage Area, acres:
4.46
Onsite:
4.46
Offsite:
0
Total Impervious Surfaces, ft2:
64,873
Lots at 4,500 ft2:
45,000
Roads/Parking, ft2
16,851
Sidewalks, ft2
3,022:
Offsite, ft2:
0
Pond Depth, fect:
5.0
Permanent Wool Elevation, FMSL:
24.50
Permitted Surface Area, ft2:
8,108 @Permanent pool elevation
Permitted Storage Volume, ft3:
14,353
Temporary Storage Elevation, FMSL:
26.00
Controlling Orifice:
1.25"cp pipe (must drawdown in 2-5 days)
i _ 3

State Stornnvater Management Systems
Pennit No. SWS 020709
11. SCHEDULE OF COMPLIANCE
1. No homeowner/lot ONN'Derldeveloper 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 pennittee 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.
3. If an Architectural Review Committee (ARC) 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 ARC do not relieve the homeowner of the responsibility to
maintain compliance with the permitted BUA limit.
4. The pennittee 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 the project area. The project area is
defined as all property owned by the permittee, for which Sedimentation and
Erosion Control Plan approval 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. r
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.
The stormwater management system shall be constructed in it's entirety, vegetated and
operational for its intended use prior to the construction of any built -upon surface.
S. 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 storrnwater treatment device, and prior to
occupancy of the facility.
4

State StomiNvater Management Systems
Permit No. SW8 020709
1 1. Decorative spray fountains will not be allowed in the stormwater treatment system
12. Permanent seeding requirements for the stormwater control must follow the guidelines
established in the North Carolina Erosion and Sediment Control Planning and Design
Manual.
13. 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 G months).
b. Sediment removal.
C. Mowing and revegetation of side slopes.
d. Immediate repair of eroded areas.
C. 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.
14. 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.
15. Prior to the sale of any lot, deed restrictions must be recorded which limit the built -upon
area per lot to the amount as shown on the Project Data Sheet, per Section I, Part 2. The
recorded statements must follow the form:
a. The following covenants are intended to ensure ongoing compliance with State
Stormwater Management Pen -nit Number SW8 020709, 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 Ston-nwater 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.
C. 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 4,500 square feet. 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. All runoff on the lot must drain into the permitted system. The developer has
determined that this will be accomplished through grading each lot in the
subdivision to drain from back to front, where the runoff will drain into the street.
Lots that will naturally drain into the system are not required to provide these
measures.
5

State Stonnwater Management Systems
Permit No. SWS 020709
16. Prior to transfer of the pennit, the stormwater facilities must be inspected by DWQ
personnel, and detennined to be in compliance with all pen -nit 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.
17. A cope 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 bear the
signature of the Permittee, the deed book number and page, and stamp/signature of the
Register of Deeds.
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 except after notice to and approval by the Director. - In the
event there is 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,
including as may be required, but 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.
2.. The penmittee is responsible for compliance with the terms and conditions of this permit
until such time as the State 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.
Pi,-rmittee 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.
G1

State Stomixvater Management Systems
Permit No. SWS 020709
Permit issued this the 3rd day of April, 2003.
NORTH CAROLINA ENVIRONMENTAL MANAGEMENT COMMISSION
Alan W. Klimek, P.E., Director
Division of Water Quality
By Authority of the Environmental Management Commission
Permit Number SW8 020709
7

The Presen°e
Stormwater Perniit No. SWS 020709
New Hanover County
Designer's Certification
State Stormwater Management Systems
Permit No. SWS 020709
Page 1 of 2
I, , as a duly registered in
the State of North Carolina, having been authorized to observe (periodically/weekly/full time) the
construction of the project,
(Prof ect)
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:
SEAL
Signature
Registration Number
Date

State Stormwater Manai}enient Systems
Permit No. SW8 020709
Certification Requirements: Page 2 of 2
l . 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. The outlet/bypass structure elevations are per the approved plan.
5. The outlet structure is located per the approved plans.
b. Trash rack is provided on the outlet/bypass structure.
7. All slopes are grassed with permanent vegetation.
S. Vegetated slopes are no steeper than 3:1.
9. The inlets are located per the approved plans and do not cause short-circuiting of
the system.
10. The permitted amounts of surface area and/or volume have been provided.
11. Required drawdown devices are correctly sized per the approved plans.
12. All required design depths are provided.
13. All required parts of the system are provided, such as a vegetated shelf, a forebay,
and the vegetated filter.
14. The overall dimensions of the system, as shown on the approved plans, are
provided.
cc: NCDENIR-DWQ Regional Office
Tony Roberts, New Hanover County Building Inspections
9

.. ..:::...::...:::.::.. .......:.r .... .............:.........
Date Received Fee Paid Permit Number
740-0Z Hod 6-1-OZ -5 200" #/C4¢S 5,_6uJ0Z070y
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
GENERAL INFORMATION
1. Applicants name (specify the name of the corporation, individual, etc. who owns the project):
_ T. Leber Corporation
2. Print Owner/Signing Official's name and title (person legally responsible for facility and compliance):
Todd Leber Vice President
3. Mailing Address for person listed in item 2 above:
�7202 Farrington Farms Drive
City: Wilmingion State: NC Zip: 28411
Telephone Number: 910-791-8623
4. Project Name (subdivision, facility, or establishment name should be consistent with project name on
plans, specifications, letters, operation and maintenance agreements, etc.):
The Preserve _
5. Location of Project (street address):
_Adjacent to Section 9 — Windemere Subdivision, at the end of Bretonshire_Road
City: Wilmin an County: New Hanover
6. Directions to project (from nearest major intersection):
From the intersection of US Hwy 17 and US Hwy 74, travel approx 1.1 miles cast on Hwy 74. Turn IeFt
Onto Bretonshirc Road. Site is located at end of road.
7. Latitude : N 340 14' 00" Longitude: W 770 49' 00" of project
8. Contact person who can answer questions about the project:
Nannc: Phillip TrippTelephone Number: 910-763-5100
11. PERMIT INFORMATION:
1. Specify whether project is (check one): X New Renewal Modification
Form SWU-101 Version 3.99 Page 1 of 4

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 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 stormwater management for the project.
wet detention pond
2. Stormwater runoff from this project drains to the Cape Fear River basin.
3. Total Project Area: 4.46 acres 4. Project Built Upon Area: 29% %.
5. How many drainage basins does the project have? 1
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.
Basin Information. '.,: �
a _.
:DraartageiBasin`I" '.�
*'Drauiage Basin"2
Receiving Stream Name
Bradley Creek
Receiving Stream Class
C-SW
Drainage Basin Area
4.46 ac
Existing Impervious * Area
-
Proposed Impervious * Area
64,873 sf
% Impervious* Area (total)
33.4
Im erutous; �_ urface urea �':= g��
*':- .6
(?, S t ..
r, D.i'ainageFBasin
,1'l g ,g
.
Dramage Bashi 2 .
On -site Buildings & driveways
45,000 sf
On -site Streets
16,851 sf
On -site Parking
On -site Sidewalks
3,022 sf
Other on -site
-
Off -site
-
Total:
E=64,873 sf
Y=
* 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

7. How was the off -site impervious area listed above derived?
IV. DEED RESTRICTIONS AND PROTECTIVE COVENANTS
The following italicized deed restrictions and protective covenants are required to be recorded for all
subdivisions, outparcels and fixture 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.
I. The following covenants are intended to ensure ongoing compliance with stale stormwater management permit
number S(.;U Y OZ0709 as issued by the Division of 'Waler Quality. 7hese covenants may
not he changed or deleted without the consent of the State.
2. No more than 4, SOD square feet of any lot shall be covered by structures ofimpervious materials.
Impervious materials include asphall, gravel, concrete, brick .stone, slate or ,Similar material but do not indi de wood
decking or the water surface ofswimming 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 recpdres a state stormwater management permit modijication prior
to construction.
J. All permitted runo f from outparcels or future development shall he directed into the permitted stormwater control
system. These connections to the stormwater control system shall he perfr)rmed 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 forni(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
Forni 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-109
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.
1. Please indicate that you have provided the following required information by initialing in the space
provided next to each item.
Applicant's Initials
• Original and one copy of the Stormwater Management Permit Application Form
• One copy of the applicable Supplement Form(s) for each BMP
• Permit application processing fee of $420 (payable to NCDENR)
• Detailed narrative description of stormwater treatmentJmanagement ri
• Two copies of plans and specifications, including:
- Develop nrent/Prcject name
- Engineer and firm
- Legend
- North arrow
- Scale
- Revision number and 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 storntwater control measures
- Wetlands delineated, or a note on plans that none exist
- Existing drainage (including off -site), drainage casements, 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): TriQp En ineerin 7. P.C. _
Mailing Address: 419 Chestnut Street
City.. Wilmington State: NC Zip: 28401
Phone: [phone] Fax: [phone]
VIII. APPLICANT'S CERTIFICATION
1, (print or type name of person listed in General Information, item 2) Todd Leber
certify that the information included on this permit application form is, to the best of my knowledge, correct and
that the project will be constructed in conformance with the approved plans, that the required deed restrictions
and protective covenants will be recorded, and that the proposed project complies with the requirements of 15A
NCAC 2H .1000. I
r " ", Signature: ` . Date:
Form SWU-101 Version 3.99 Page 4 of 4

Permit No. SuF02070cl
(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 signed and
notarized operation and maintenance agreement.
L PROJECT INFORMATION (please complete the following information):
Project Name: The Preserve
Contact Person: Phillip Tripp Phone Number: (_ 910 )_763-5100
For projects with multiple basins, specify which basin this worksheet applies to: 1
elevations
Basin Bottom Elevation
19.5
ft.
Permanent Pool Elevation
24.5
ft.
Temporary Pool Elevation
26.0
ft.
areas
Permanent Pool Surface Area
8,108
sq.ft.
Drainage Area
4A6
ac.
Impervious Area
1.49
ac.
(floor of the basin)
(elevation of the orifice)
(elevation of the discharge structure overflow)
(water surface area at the orifice elevation)
(on -site and off -site drainage to the basin)
(on -site and off -site drainage to the basin)
volumes
Permanent Pool Volume 21,750 cu.ft. (combined volume of main basin and forebay)
Temporary Pool Volume 14 353 cu.ft. (volume detained above the permanent pool)
Forebay Volume 4,814 cu.ft. (approximately 20% of total volume)
Other parameters
SA/DA' 2.44 (surface area to drainage area ratio from DWQ table)
Diameter of Orifice 1.25 in. (2 to S day temporary pool draw -down required
Design Rainfall 1.0 in.
Design TSS Removal2 90 % (minimum 85% required)
Form SWU-102 Rev 3.99 Page 1 of 4

Footnotes:
1. When using the Division SAIDA tables, the correct SAIDA ratio for permanent pool sizing should be computed based upon the
actual impervious'% and permanent pool dep(h. Linear interpolation should be employed to determine the correct value for non-
standard table entries.
2. In the 20 coastal counties, the requirement for a vegetative filter may be Nvaived if the Nvet 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.
Il. 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
CJ)C— 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 total basin volume,
c DC c. The temporary pool controls runoff from the design storm event.
lT7�C d, The temporary pool draws down in 2 to 5 days.
io e. If required, a 30-foot vegetative filter is provided at the outlet (include non -erosive flow
calculations).
G'P-1 - 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.
h. A submerged and vegetated perimeter shelf with a slope of 6;1 or less {show detail).
C� i. Vegetative cover above the permanent pool elevation is specified.
e-Jjk= j. A trash rack or similar device is provided for both the overflow and orifice.
k. A recorded drainage easement 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 to be performed prior to use as a wet detention basin
ej%CI 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) ❑ does X does not incorporate a vegetated filter at the outlet.
This system (cheek one) ❑ does X does not incorporate pretreatment other than a forebay.
Form SWIi-102 Rev 3.99 Page 2 of 4

Maintenance activities shall be performed as follows:
l . After every significant runoff producing rainfall event and at least monthly:
a. Inspect the wet detention 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, mow vegetative
cover to maintain a maximum height of six inches, and remove trash as needed.
3. Inspect and repair the collection system (Le. 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 not be handled in a manner that will 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
When the permanent pool depth reads
Sediment Removal El. 22.25 7
Bottom ovation
FOR.EBAY
o�
a
3.75 feet in the main pond, the sediment shall be removed.
2.25 feet in the forebay, the sediment shall be removed.
BASIN DIAGRAM
(fill in the blanks)
Permanent Pool Elevation 24.5
----- Sediment_ Removal Elevation 20.75-___-_ 75%
---------------- --- ----
Bottom Elevation 19.5
MAIN POND
5. Remove cattails and other indigenous wetland plants when they cover 50% of the basin surface. These
plants shall be encouraged to grow along the vegetated shelf and forebay berm.
b. 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 possible.
Form SWU-102 Rev 3.99 Page 3 of 4

7. All components of the wet detention basin system shall be maintained in good working order.
1 acknowledge and agree by my signature below that I am responsible for the performance of the seven
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: Todd Leber
Title: Urer
Address: 7202 Farrington Farms Drive, Wilmington, NC 28411
Phone: [phone]
y
Signature: i�
Date: 17 ` If _0
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, Della C. Baird a Notary Public for the State of North Carolina County
of Pender do hereby certify that Todd Leber
personally appeared before me this I day of June , _2002`, and acknowledge the due
execution of the forgoing wet detention basin maintenance requirements. Witness my hand and official seal,
--D,Q,ItL C.
°NpTA& a�=
"��2. PUBLIC �Ci`
,V
'�17rrrris+ii++�``
SEAL
My commission expires _October 15, 2006
Form SWU-102 Rev 3.99 Page 4 of 4