SW8010120_CURRENT PERMIT_20011022

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

Michael F. Easley, Governor
William G. Ross, Jr., Secretary
North Carolina Department of Environment and Natural Resources
Gregory J. Thorpe, Ph.D., Acting Director
Division of Water Quality
Wilmington Regional Office
October 22, 2001
Mr. Michael I. Arnolt, Owner
Arnolt Partners
3833 N. Meridian Street
Indianapolis, IN 46208
Subject: Permit No. SW8 010120
SouthSide Business Park
High Density Subdivision Stormwater Project
New Hanover County
Dear Mr. Arnolt:
The Wilmington Regional Office received a complete Stormwater Management Permit Application for SouthSide
Business Park on July I6, 2001. 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 010120, dated October 22, 2001, for the construction of the project, SouthSide Business Park.
This permit shall be effective from the date of issuance until October 22, 2011, 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 sormwater 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 Linda Lewis, or me
at [phone].
Sincerely,
Rick Shiver
Water Quality Regional Supervisor
RSS/:arl S:1WQSISTORMWATIPERMIT1010120.00T
cc: Phil Tripp, P.E.
Nelson B. Fry, Authorized Agent
Tony Roberts, New Hanover County Inspections
Beth E. Wetherill, New Hanover County Engineering
Linda Lewis
Wilmington Regional .Office
Central Files
N.C. Division of Water Quality 127 Cardinal Drive Extension Wilmington, N.C. 26405 [phone] Fax [phone] Customer service
V 800-623-7748

State Siormwater Management Systems
Permit No. SW8 010120
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
Michael1.. Arnolt Owner
SouthSide Business Park
New Hanover 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 October 22, 2011 and shall be subject to the following
specified conditions and limitations:
I. DESIGN STANDARDS
1. This permit is effective only with respect to the nature and volume of stormwater described in the
application and other supporting data.
2. This stormwater system has been approved for the management of stormwater runoff as described on page
3 of this permit, the Project Data Sheet. The subdivision is permitted for 4 lots, each allowed a maximum
amount of built -upon area as follows: Lot 1 @33,232 ftz; Lot 2@ 51,836 ftz; Lot 3 @46,283 ftz; and Lot 4
@122,186 ftz.
3. Approved plans and specifications for this project are incorporated by reference and are enforceable parts
of the permit.
2

State Stormwater Management Systems
Permit No. SW8 010120
Project Name:
Permit Number:
Location:
Applicant:
Mailing Address:
Application Date:
Name of Receiving Stream 1 Index #
CIassification of Water Body:
If Class SA, chloride sampling result
Design Storm:
Pond Depth, feet:
Permanent Pool Elevation, FMSL:
Drainage Area, acres:
Total Impervious Surfaces, ffi2:
Lot 1
Lot 2
Lot 3
Lot 4
Offsite Area entering Pond, ft2:
Required Surface Area, ft2:
Provided Surface Area, ft2:
DIVISION OF WATER QUALITY
PROTECT DATA SHEET
SouthSide Business Park
SW8 010120
New Hanover County
Mr. Michael 1. Arnolt, Owner
Arnolt Partners
3833 N. Meridian Street
Indianapolis, IN 46208
July I6, 2001
Cape Fear River / CFR 18-71
"SC"
s: n/a
1
7.50
27.00
7.58
253,628
33,232 ft2
51,836 ft2
46,283 ft2
122,186 ft2
Required Storage Volume, ft3:
Provided Storage Volume, ft3:
Temporary Storage Elevation, FMSL:
Controlling Orifice:
none, per Engineer
8,719
11.098
22,412
41,574
30
2"y pipe
3 t.

State Stormwater Management Systems
Permit No. SW8 010120
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.
If an Architectural Review Committee (ARC) is required to review plans for compliance with the BUA
Iimit, the plans reviewed must include sidewalks and driveways. Any approvals given by the ARC do not
relieve the homeowner of the responsibility to maintain compliance with the permitted BUA limit.
4. The following items will require a modification to the permit:
a. Any revision to the approved plans, regardless of size.
b. Project name change.
C. Transfer of ownership.
d. Redesign or addition to the approved amount of built -upon area.
e. Further subdivision, 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.
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 it's 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. Decorative spray fountains will not be allowed in the stormwater treatment system.
11. 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.
12. Unless specified elsewhere, permanent seeding requirements for the stormwater control must follow the
guidelines established in the North Carolina Erosion and Sediment Control Planning and Design Manual.
4 }

State Stormwater Management Systems
Permit No. SW8 010120
13. Prior to transfer of the permit, the pond must be inspected by DWQ personnel, and determined to be in
compliance with all permit conditions. Ariy 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.
14. The permittee shall at all times provide the operation and maintenance necessary to assure the permitted
stormwater system functions 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.
C. Maintenance of side slopes in accordance with approved plans and specifications.
f. Debris removal and unclogging of outlet structure, orifice device and catch basins and piping.
g. Access to the outlet structure must be available at all times.
15. 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.
16. 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 maximum built -upon area per lot is limited as follows: Lot 1 @33,232 ft2; Lot 2@ 51,836 ft2;
Lot 3 @46,283 ft2; and Lot 4 @122,186 ft2. 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, coquiria and parking areas, but does not include raised,
open wood decking, or the water surface of swimming pools."
b. "The covenants pertaining to stormwater regulations may not be changed or deleted without
concurrence of the State."
"Alteration of the drainage as shown on the approved plan may not take place without the
concurrence of the State."
d. "Lots within CAMA's Area of Environmental Concern may be subject to a reduction in their
allowable built -upon area due to CAMA regulations."
e. "All runoff 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 naturally drain into the
system are not required to provide these measures."
17. 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 bear the signature of the Permittee, the
deed book number and page, and stamp/signature of the Register of Deeds.
5
t

State Stormwater Management Systems
Permit No. SW8 010120
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. 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.
20. 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. 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, such as a copy of
the deed of trust. Other supporting matcrials, such as a signed Operation and Maintenance plan in the case
of engineered systems, will also be required. 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. 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.
3. The issuance of this permit does not preclude the Permittee from complying with any and all statutes, rules,
regulations, or ordinances which may be imposed by other government agencies (local, state, and federal)
which have jurisdiction.
4. In the event that the facilities fail to perform satisfactorily, including the creation of nuisance conditions,
the Permittee shall take immediate corrective action, including those as may be required by this Division,
such as the construction of additional or replacement stormwater management systems.
The permit may be modified, revoked and reissued or terminated for cause. The filing of a request for a
permit modification, revocation and reissuance or termination does not stay any permit condition.
6. Permittee grants permission to staff of the DWQ to access the property for the purposes of inspecting the
stormwater facilities during normal business hours.
7. The permittee shall notify the Division of any name, ownership or mailing address changes within 30 days.
Permit issued this the 22nd day of October, 2001.
NORTH CAROLINA ENVIRONMENTAL MANAGEMENT COMMISSION
Gregory J. Thorpe, PhD., Acting Director
Division of Water Quality
By Authority of the Environmental Management Commission
Permit Number SW8 010120
6

State Stormwater Management Systems
Permit No. SW8 010120
SouthSide Business Park Page 1 of 2
Stormwater Permit No. SW8 010120 -
New Hanover County
Designer's Certification
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,_ SouthSide Business Park, for Michael 1. Arnolt, 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
614Wf11
7

Certificatiou Requirements:
cc
State Stormwater Management Systems
Permit No. SW8 010120
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. The outlet/bypass structure elevations are per the approved plan.
5. The outlet structure is located per the approved plans.
6. Trash rack is provided on the outlet/bypass structure.
.7. All slopes are grassed with permanent vegetation.
.8. 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.
NCDENR-DWQ Regional Office
Tony Roberts, New Hanover County Building Inspector
8
.t

State of North Carolina
Department of Environment and Natural Resources
Division of Water Quality
STORMWATER MANAGEMENT PERMIT APPLICATION FORM
This form may he photocopied for use as an original
GENERAL INFORMATION
1. Applicants name (specify the name of the corporation, individual, etc. who owns the project):
Michael I. Arnolt Owner
2, Print Owner/Signing Official's naive and title (person legally responsible for facility and compliance):
Nelson B, Ski F Project Manager
3. Mailing Address for person listed in item 2 above:
3833 N. Meridian Street
City: Indianapolis State: IN Zip
46208
Telephone Number: 317-926-2766
4. Project Name (subdivision, facility, or establishment name — should be consistent with project name on
plans, specifications, letters, operation and maintenance agreements, etc.):
SouthSide Business Park
5. Location of Project (street address):
River Road
City: Wilmin *tom County: New Hanover
6. Directions to project (from nearest major intersection):
approx. 3200 If north from the intersection of SR 1 186 and SR 1100
7. Latitude: N 34" Longitude: _ W 770 _ of project
8. Contact person who can answer questions about the project:
Name: Phillip G. TrippTelephone Number: 910-763-5100
11. PERMIT INFORMATION:
1. Specify whether project is (check one): X New Renewal Modification
2. If this application is being submitted as the result of a renewal or modification to an existing permit, list
Form SWU-101 Version 3.99 Page 1 of 4

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 Pen -nit Other
4. Additional Project Requirements (check applicable blanks):
CAMA Major X Sedimentation/Erosion Control 4041I401 Permit NPDES Stormwater
Information on required state permits can be obtained by contacting the Customer Service Center at
1-877-623-6748.
Ill. PROJECT INFORMATION
1. In the space provided below, summarize how stormwater will be treated. Also attach a detailed narrative
(one to two pages) describing stonmvater management for the project.
stormwater detention pond
2. Stormwater runoff from this project drains to the Ca e Fear River basin.
3. Total Project Area: 7.58 acres
5. How many drainage basins does the project have'? _ 1
4. Project Built Upon Area: 76.81 %,
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.
:.:......._:,...:.....:::.::.:.::::.:.::..:.:.::::.:.::::....::...::...::.:._........
:
........................::.�:X.:
.... ............................................ �..............................
...... ........ ....:::::.:::::.:...:.:.:_:._......
y.:.:�.r�.:.::• o- 2C :.�r. �rs�gi2; ifiti:?
� .. � . , � , � :•:.,.::•::::: e:!:1$,.:::.::...::::...::..:...::.
....... .......... .::.....::..:.:.::::.:.:::::.....
.if$::::....:.,::.::
Receiving Stream Name
Cape Fear
Receiving Stream Class
C-SW
Drainage Basin Area
7.59 ac
Existing Impervious * Area
0
Proposed Impervious * Area
5,82 ac
% Impervious* Area (total)
76.81 %
.....r.............y.:.:..:.::.:.}:viii•?;.:n,:.:.:.:...
::::.. :...:..::..::..::::::. r.:.::..� ;.r.:r :.r
Ii
:.:: ...:r...::..:r:: ...r.:�:.::..:�:.:i.:tii.::. .r.....:
On -site Buildings
0
On -site Streets
0
On -site Parking
0
On -site Sidewalks
0
Other on -site
253,628 sf
Off -site
0
Total:
Y,=253,628 sf
E=
* Impervious area is defined as the built upon area including, but not limited to, buildings, roads, parking
areas sidewalks, gravel areas, etc.
7. How was the off -site impervious area listed above derived'? NA
Form SWU-101 Version 3.99 Page 2 of 4

IV. DEED RESTRICTIONS AND PROTECTIVE COVENANTS
The following italicized deed restrictions and protective covenants are required to be recorded for all
subdivisions, outparcels and future development prior to the sale of any lot. If lot sizes vary significantly, a
table listing each lot number, size and the allowable built -upon area for each lot must be provided as an
attachment.
1. The following covenants are intended to ensure ongoing compliance with state stormwater management permit
number SW8 010120 as issued by the Division of Water Quality. These covenants may
not be changed or deleted without the consent of the State.
2. No more than Lot 1-33, 323 sf Lot 2-51, 836 sf Lot 3-46, 283 sf Lot 4-122,186 sf square feet of any lot shall be
covered by structures of 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, pilxd 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 modocation prior
to construction.
5. A llpermifted nrrn fffrom outparcels or future development shall be directed into the permitted stormwater control
system. 777ese connections to the stormwater control system shall be performed in a manner that maintains the
integrity and performance of the system as permitted
By your signature below, you certify that the recorded deed restrictions and protective covenants for this project
shall include all the applicable items required above, that the covenants will be binding on all parties and
persons claiming under them, that they will run with the land, that the required covenants cannot be changed or
deleted without concurrence from the State, and that they will be recorded prior to the sale of any lot.
V. SUPPLEMENT FORMS
The applicable state stonnwater management pen -nit supplement form(s) listed below must be submitted for
each BMP specified for this project. Contact the Stormwatcr 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
VI. SUBMITTAL REQUIREMENTS
Form SWU-101 Version 3.99 Page 3 of 4

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.
I , 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 CDC
• One copy of the applicable Supplement Form(s) for cacti BMP
• Permit application processing fee of $420 (payable to NCDENR)
• Detailed narrative description of stormNvater treatmerithrranagen7ent-
• Two copies of plans and specifications, including: �[
- Development/Projcct name
Engineer and firm
Legend
North arrow
Scale
- Revision number and dote t
- Mean high water line
Dimensioned property/project boundary
Location ninp with named streets or NCSR numbers
- Original contours, proposed contours, spot elevations, finished Boor elevations
Details of roads, drainage features, collection systems, and stornnvater control mcasures
Wetlands delineated, or a note on plans Ihal none exist.
Existing drainage (including off -site), drainage easements, pipe sizes, nrnoff calculations
Drainage areas delineated
Vegetated buffers (where required)
VII. AGENT AUTHORIZATION
IF you Nvish to designate authority to another individual or fine so that they may provide information on your
behalf please complete this section.
Designated agent (individual or firm): Tripp Engineering. P.C.
Mailing Address: 419 Chestnut Street
City; Wilmington _ _ State: NC Zip
Phone: 910�I00
Vlll. APPLICANT'S CERTIFICATION
Fax: [phone]
28401
I, (print or Ivpe name of'person listecl in General Information, item 2) Nelson B. (Skip ,
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 Nvill be recorded, and that the proposed project complies with the requirements of 1 5A
NCAC 21-i .1000.
Signature:
T� Date:
Form SWU-101 Version 3.99 Page 4 of 4

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�i

Permit No. SW8 010120
(to be provided by DIVO
State of North Carolina
Department of Environment and Natural Resources
Division of Water Quality
STORMWATER MANAGEMENT PERMIT APPLICATION FORM
WET DETENTION BASIN SUPPLEMENT
T his 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,
1. PROJECT INFORMATION (please complete the following information):
Project Name: _SouthSide Business Park
Contact Person: Charles Cazier Phone Number: 910 7635100
For projects with multiple basins, specify which basin this worksheet applies to: 1
elevations
Basin Bottom Elevation 19.5 ft.
Permanent Pool Elevation 27.0 ft.
Temporary Pool Elevation 30.0 ft.
(floor of the hasin)
(elevation of the orifice)
(elevation of the discharge structure overflow)
areas
Permanent Pool Surface Area 11,098 sq.ft. (water surface area at the orifice elevation)
Drainage Area
Impervious Area
vohtmes
Permanent Pool Volume
Temporary Pool Volume
Forebay Volume
Other parameters
SA/DA'
Diameter of Orifice
Design Rainfall
Design TSS Remova12
7.58 ac. (on -site and off -site drainage to the basin)
5.82 ac. (on -site and off -site drainage to the basin)
_42,011 cu.ft. (combined volume of main basin and forebay)
__41 Z4 cu.ft. (volume detained above the permanent pool)
_8,003 ___- cu.ft. (approximately 20% of total volume)
2.65_ (surface area to drainage area ratio from DWQ table)
2.0 in. (2 to 5 day temporary pool draw -down required)
1.0 in.
90 % (minimum 85% required)
Form SWU-102 Rev 3.99 Page 1 of 4

Footnotes:
I. 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.
2. 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.
M 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
A a. The permanent pool depth is between 3 and 6 feet (required minimum of 3 feet).
�f�AB b. The forebay volume is approximately equal to 20% of the total basin volume
{ c. The temporary pool controls runoff from the design storm event.
d. The temporary pool draws down in 2 to 5 days.
/yA 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.
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.
J 4#1 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
Item m. A mechanism is specifiedwhich will drain the basin for maintenance or an emergency.
111. 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 (check one) ❑ does X does not incorporate pretreatment other than a forebay.
Form SWU-102 Rev 3.99 Page 2 of 4

Maintenance activities shall be performed as follows:
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 (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 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 5.625 feet in the main pond, the sediment shall be removed.
When the permanent pool depth reads 2.25 feet in the forebay, the sediment shall be removed.
BASIN DIAGRAM
(fill in the hlat&)
Permanent Pool Elevation 27.0
Sediment Winoval El. 24.75 1 7
_______________ __ Sediment. Removal Elevation 21.375 75%.
e ---- 2=t.0 5`%, --------------------------------------------
Bottomeinov 21.37_
Bottom Elevation 19,5 25
FOREBAY MAIN POND
5. Remove cattails and other indigenous wetland plants when they cover 50% of the basin surface. These
plants shall be encouraged to grow along the vegetated shelf and forebay berm.
6. If the basin must be drained for an emergency or to perform maintenance, the flushing of sediment
through the emergency drain shall be minimized to the maximum extent possible.
Form SWU-lot Rev 3.99 Page 3 of 4

7. All components of the wet detention basin system shall be maintained in good working order.
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: _ Nelson B.(Skip)Fr
Title: Project Man
Address: 3410 River Rd., Wilmington, NC 28412
Phone: [phone]
Signature: f/J i
Date: l—/tv or
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.
1, Monica V. Loughlina Notary Public for the State of North Carolina
County of New Hanover do hereby certify that Nelson B.(Skip)_Pry, Project Manager personally
appeared before nie this 4 day of Janua 2001 and acknowledge the due execution of
the forgoing wet detention basin maintenance requirements. Witness my hand and official seal,
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SEAL
My commission expires 08/07/01
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Form S W U- M2 Rev 3.99 Page 4 of 4