SW8051220_CURRENT PERMIT_20060308

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

Michael F. Easley, Govemor
William G. Ross Jr., Secretary
North Carolina Department of Environment and Natural Resources
Alan W. Klimek, N.E. Director
Division of Water Quality
March 8, 2006
Adesola Awomolo
346 Royal Bluff Road
Jacksonville, NC 28540
Subject: Stormwater Permit No. SW8 051220
Medical Office Building Memorial Drive
High Density Project
Onslow County
Dear Mr. Awomolo:
The Wilmington Regional Office received a complete Stormwater Management Permit
Application for Medical Office Building Memorial Drive on March 8, 2006. Staff review of the
plans and specifications has determined that the project, as proposed, will comply with the .
Stormwater Regulations set forth in Title 15A NCAC 2H.1000. We are forwarding Permit No.
SW8 051220 dated March 8, 2006, for the construction of the subject project.
This permit shall be effective from the date of issuance until March 8, 2016, and shall be
subject to the conditions and limitations as specified therein. Please pay special attention to
the Operation and Maintenance requirements in this permit. Failure to establish an adequate
system for operation and maintenance of the stormwater management system will result in
future compliance problems.
If any parts, requirements, or limitations contained in this permit are unacceptable, you have
the right to request.an adjudicatory hearing upon written request within thirty (30) days
following receipt of this permit. This request must be in the form of a written petition,
conforming to Chapter 1508 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 Rhonda Hall, or me at [phone].
SincereLy;''
L2
Ed Beck
Regional Supervisor
Surface Water Protection Section
ENB/rbh: S:IWQSISTORMWATIPERMIT1051220.mar06
cc: David K. Newsom, PE, Crystal Coast Engineering, PA
John L. Pierce, John L. Pierce & Associates, P.A.
Onslow County Building Inspections
Rhonda Hall
Wilmington Regional Office
Central Files one
NorthCarolina
11vaturallif
North Carolina Division of Water Quality 127 Cardinal ]give Extcnsion Wilmington, NC 29405 Phone [phone] Customer Service
Wilmington Regional Office Internet: wwwricwateruuality,org Fax [phone]
An Equal Opportunity/Affirmative Action Employer — 50% Recycled/1 0% Post Consumer Paper

r
State Stormwater Management Systems
Permit No. SW8 051220
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
Adesola Awomolo
Medical Office Building Memorial Drive
Onslow 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 March 8, 2016, 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 in Section 1.6 on page 3 of this permit. The stormwater
control has been designed to handle the runoff from 32,905 square feet of
impervious area.
3. The tract will be limited to the amount of built -upon area indicated -on page 3 of
this permit, and per approved plans.
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 all built -upon area within the permitted drainage area of this
project must be directed into the permitted stormwater control system.
Page 2 of .7

0
State Stormwater Management Systems
Permit No. SW8 051220
R
The following design criteria have been provided in the wet detention pond and
must be maintained at design condition:
a. Drainage Area, acres:
Onsite, ft
Offsite, ft2:
b. Total Impervious Surfaces, ft2:
C. Design Storm, inches:
d. Pond Depth, feet:
e. TSS removal efficiency:
f. Permanent Pool Elevation, FMSL:
g. Permanent Pool Surface Area, ft2:
h. Permitted Storage Volume, ft3:
i. Temporary Storage Elevation, FMSL:
j. Controlling Orifice:
k. Permitted Forebay Volume, ft3:
I. Receiving Stream/River Basin.-
M. Stream Index Number:
n. Classification of Water Body
11. SCHEDULE OF COMPLIANCE
1.40
60,973
None
32,905
1
5
90
32.00
2,941
3,054
32.92
0.75" 0 pipe
980
Scales Creek I White Oak
19-16-4
"SC; HQW; NSW"
1. 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.
2. During construction, erosion shall be kept to a minimum and any eroded areas of
the system will be repaired immediately.
3. 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 slopes and the vegetated filter.
d. Immediate repair of eroded areas.
e. Maintenance of all slopes in accordance with approved plans and
specifications.
f. Debris removal and unclogging of outlet structure, orifice device, flow
spreader, catch basins and piping.
g. Access to the outlet structure must be available at all times.
Page 3 of 7

State Stormwater Management Systems
Permit No. SW8 051220
4. Records of maintenance activities must be kept and made available upon
request to authorized personnel of DWQ. The records will indicate the date,
activity, name of person performing the work and what actions were taken.
5. 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 a fountain in this pond is 118 horsepower.
6. The facilities shall be constructed as shown on the approved plans. 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.
7. 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. A
modification may be required for those deviations.
8. 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.
9. Access to the stormwater facilities shall be maintained via appropriate
easements at all times.
10. 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 any item shown on the approved plans, including the
stormwater management measures, built -upon area, details, etc.
b. Project name change.
C. Transfer of ownership.
d. Redesign or addition to the approved amount of built -upon area or to the
drainage area.
e. Further subdivision, acquisition, lease 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.
11. The permittee shall submit final site layout and grading plans for any permitted
future areas shown on the approved plans, prior to construction.
12. 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.
Page 4 of 7

State Stormwater Management Systems
Permit No. SW8 051220
13. 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.
Ill. GENERAL CONDITIONS
This permit is not transferable except after notice to and approval by the Director.
In the event of a change of ownership, or a name change, the permittee must
submit a formal permit transfer request to the Division of Water Quality,
accompanied by a completed name/ownership change form, documentation
from the parties involved, and other supporting materials as may be appropriate.
The approval of this request will be considered on its merits and may or may not
be approved. The permittee is responsible for compliance with all permit
conditions until such time as the Division approves the transfer request.
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) having 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.
5. The permittee grants DENR Staff permission to enter the property during normal
business hours for the purpose of inspecting all components of the permitted
stormwater management facility.
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. 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.
8. Approved plans and specifications for this project are incorporated by reference
and are enforceable parts of the permit.
9. The permittee shall notify the Division any name, ownership or mailing address
changes within 30 days.
Permit issued this the 81h day of March, 2006.
NORTH CAROLINA ENVIRONMENTAL MANAGEMENT COMMISSION
for Al -an W. Klimek, P.E., Director
Division of Water Quality
By Authority of the Environmental Management Commission
Page 5 of 7

State Stormwater Management Systems
Permit No. SW8 C51220
Medical Office Building Memorial Drive
Stormwater Permit No. SW8 051220
Onslow County
Designer's Certification
1, , as a duly registered
in the State of North Carolina, having been authorized to observe (periodically/ weekly/
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 is included in the Certification.
Noted deviations from approved plans and specification:
Signature
Registration Number
Date
SEAL
Page 6 of 7

State Stormwater Management Systems
Permit No. SW8 051220
Certification Requirements:
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,
and a forebay.
15. . The required system dimensions are provided per the approved plans.
cc: NCDENR-DWQ Regional Office
Onslow County Building Inspections
Page 7 of 7

OFFICE USE ONLY
Date Received Fee Paid
ermrt Number
State or North Carolina
Department of Environment and Natural Resources
Division of Water Quality
STORMWATER MANAGEMENT PERMIT APPLICATION FORM
This farm maY be photocopied for use as an original
1. GENERAL INFORMATION
1. Applicants name (specify the name of the corporation, individual, etc. who owns the project):
Adesola Awomolo & Abavomi Osunkoya
2. Print Owner/Signing Official's name and. title (person legally responsible for facility and compliance):
Adesola Awomolo -Q t Jr, e r
3. Mailing; Address for person listed in item 2 above:
346 Roval Bluff Rd.
City: Jacksonville State: NC Zip; 28540
Telephone Number: ( -1/ 0
4. Project Name (subdivision, facility, or establishment name - should be consistent with project name oil plans,
specifications, letters, operation and maintenance agreements, etc.);
Medical Office Building Memorial Drive
5. Location of Project (street address):
Memorial Dr.
City; Jacksonville
County: Onslow
6. Directions to project (from nearest major intersection):
From intersection of NC 24 and US 17 in Jacksonville, go north on US 17 approx. 2.4 miles to Western Blvd. Right on Western
Blvd, go approx. 0.9 miles to Memorial Dr. Right on Memorial Dr, go approx. 0.26 rniles (1,370 ft). Site on right.
7. Latitude: 34" 45' 53" N
Longitude: 77" 23' 14" W
or project
8. Contact person who can answer questions about the project:
Name; David K. Newsom, PE (Crystal Coast Engineering, PA) Telephone Number: ( 910 ) 325-0006
11. PERMIT INFORMATION:
1. Specify whether project is (check one): X New Renewal Modification
Form SWU-101 Version 3.99 Page I 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 _404,1401 Permit TIUPDFS Stormwater
Information on required state -permits can be obtained by contacting the Customer Service Center at
1-877-623-6748,
lll. PROJECT INFORMATION
I
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 will be collected and treated in a wet detention basin,
2. Stormwater runoff from this project drains to the White Oak (New River) River basin.
3. 'Total Project Area: 1.40 acres 4. Project Built Capon Area: 54.0
5. Flow many drainage areas 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.
13asm lntgr,ttatron ;,;: ', Dratrage Area,1 Draiita e Area ?
�r
.. . .: j. " C
Receiving Stream Name UT of Scales Creek
Receiving Stream Class SC;HQW NSW
Drainage Area 60,973 sf
Existing Impervious* Area 248 sf
Proposed Impervious*Area 32,657 sf
% Impervious* Area (total) 54,0010
*
ervtous ;Stu lace Areal.
, r Dr3rn3�c Area l' r;
, a Drama c F1rc a 2
On -site Buildings
8,237 sf
On -site Streets
0
On -site Parking
exist: 248 sf/ prop: 23,070 sf
p P�
On -site Sidewalks
1,350 sf
Other on -site
-0-
0t -site
-a-
Total: 32,905 sf
'Total:
Impervious area is defined as the bur i upon area inelttcdng, but not limited to, buildings, roads, parking areas,
side'11'alkv, 1 ravel areas, etc.
Dorm SWU-101 Version 3,99 Page 2 ol'4
00

7. How was the off -site impervious area listed above derived''
IV, DEED RESTRICT[ONS 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 storrnwater management permit number
NIA as issued by the Division of 6Yater Quality. These covenants mat, not be
changed or deleted without the consent of the State.
No more than NIA square feet of any lot shall he covered fiv struciures or imperviou..s materials-.
Impervious materials include asphalt, gravel, concrete, brick, stone, slate or similar material brit do not include wood
decking or the water sui face of swimming pools.
3. Su=ales shall not be filled in, piper, or altered except as necessary to provide drivewav crossings.
4. Bidlt-upon area in excess of the permitted amount requires u state stormwater management permit modification prior to
Construction.
5. All permitted runoff:f rom outparcels or fuhwe development shall be directed into the permitted sturmivuter control
System. These Connections to the storntwcrter 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 ofany lot.
SUPPLENIENT FORMS
The applicable state storrnwater management permit supplement form(s) listed below must be submitted for each
BMP specified for [his project. Contact the Stormwater and General Permits Unit a[ [phone] for the status
and availability of these forms.
Form SWU-IO2
Wet Detention Basin Supplement
Form SWU-1.03
Infiltration Basin Supplement
Form SWU-104
Low Density Supplernent
Form SWU-105
Curb Outlet System Supplement
Form SWU-106
Off -Site System Supplement
Form SWU-107
Underground Infiltration `french 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

VI. SUBMITTAL REQUIREMENTS
Only complete application packages will be accepted and reviewed by the Division of Water Quality (I)WQ).
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.
nitials
• 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 S420 (payable to NCDENR)
• Detailed narrative description of stormwater treatnientimanageinent
• 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 mtmbers
- Original contours. proposed contours, spot elevations, finished floor elevations
Details of roads, drainage features, collection systems, and stonawater control measures
- Wetlands delineated, or a note on plans that none exist
- Existing drainage (including off -site). drainage easements, pipe sizes, runoff calculations
- Drainaee areas delineated
- Vegetated buffers (where required)
VI1. 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): Crystal Coast Engineering, PA
M.ailin- Address: 3817-3 Freedom Way
City: Hubert
Phone: ( 910 ) 325-0006
VIII. .APPLICANT'S CERTIFICATION
State: NC 7ip:28539
Fax: ( 910 l 325-0060
I, (print or Ape name q[person listed in General Information, rteni 2)
certify that the information included on this permit application form is
that the project will be constructed in conformance with the approve
and protective cove_, is will recorded, and that the proposed pr e
NCAC 21-1. l OW--
Signature:
Form SVU-101 Version 3.99
Page d of d
Adesola Awornolo
to the best of my knowledge, correct and
arts, that the required deed restrictions
complies with the requirements of 15A.
y—
Date:L_'io
DEC 1 6 2005

Permit No. C�1icJ80 i ���
(to be provided by DWQ)
State of North Carolina
Department of Environment and Natural Resources
Division of Water Quality
STORMWATER MANAGEMENT PERM[T APPLICATION FORM.
WET DETENTION BASIN SUPPLEMENT
This form inay be photocopied for use us un original
DWQ Stormwater Nlanagement Plan Review:
A complete stormwater management plan submittal includes an application form, a wet detention basin
supplement for each basin, design calculations, and plans and specifications showing all basin and outlet
structure details.
I. PROJECT INFORMATION
Project Name: Medical Office Building Memorial Drive
Contact Person: David K.Newsom PE, Crystal Coast Engineering, PA Phone Number. ( 910 4 325-0006
For projects with multiple basins, specify which basin this worksheet applies to: Land only
elevations
Basin Bottom Elevation 27.00 ft. (floor of the basin)
Permanent Pool Elevation 32.00 ft. (elevution of the orifice)
TeGnporary Pool Elevation 32.92 ft. (elevation of the discharge structure overfloll)
areas
Permanent Pool Surface Area 2,941 sq, ft
Drainage Area 1.40 ac
Impervious Area
0.76 ac
(iiiater.surf'ace area at the orifice elevation)
(()n-site and off -site (1i-ainac e to the basin)
(on -site and of
f--site drerina�)-e to the basin)
volumes
Permanent Pool Volume 4,922 cu. ft. (combined voliune of main Basin an(lfbrebuti)
Temporary Pool Volume 3,054 cu. ft. (volume detained above the permanent pool)
FoNbay Volume 980 cu. ft. (approximately 20% of'total volume)
Other parameters
SWDA ! 3.8967 (surface area to drainage area ratio fi•oni DII'O table)
Diameter of Orifice 0.75 in. (2 to 5 day temporary pool draw-doivii required)
Design Rainfall 1"
Design TSS Removal 2 90 `%a (minimum 85% required)
Donn SWU-102 Rev 3.99 Page I oN

Footnotes:
1 When using the Division SA/DA tables, the correct SA/DA ratio for permanent poot 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?,; 'SS rernoval. The NCDENR 13NIP manual provides design tables for both $5°10 TSS removal and 90°,, TSS removal.
II. REQUIRED ITEMS CHECKLIST
The following checklist outlines design requirements per the Stormwater Best Management Practices Manual
(N.C. Department of Environment, Health and Natural Resources, February 1999) and Administrative Code
Section: 15 A NCAC 2H .1008,
Initial in the space provided to indicate the following design requirements have been met and supporting
documentation is attached. If the applicant has designated an agent in the Stormwater Management Permit
Application Form, the agent may initial below. If a requirement has not been met, attach justification.
Applicants Initials
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.
d. The temporary pool draws down in 2 to 5 days.
r� e. If required, a 30-foot vegetative falter 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. 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 prior to use as a wet detention basin.
ln. 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 f'orebays and the
vegetated filter il'one is provided.
This system (check one) 0 does 0 does not incorporate a vegetated filter at the outlet.
This system (check one) 0 does 0 does not incorporate pretreatment other than a forebay.
rorni SWU-102 Rev 3.99 Page 2 of 4FBY:
7 1 6 2005
--_ ---

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, 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 mariner 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 measurina 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. W
When the permanent pool depth reads 3.75 feet in the main pond, the sediment shall be removed.
When the permanent pool depth reads 3.00 feet in the forebay, the sediment shall be removed.
BASIN DiACRAM
6/21l in the bduirktiy
V Permanent Pool I:?lcvatinn 32.00
Sediment Rcnwval II. 29.00 75
V — — — — Sedi:nenl Removal Elevation 28.25
Bottom Elevation 28.00 2Sg„ — — — ��0�
'4
Bottom Elevation 27.Q0 .,aa�o
FOREBAY MAIN PUNT]
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 practical.
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.
l acknowledge and agree by my signature below that I ain responsible for the performance of the seven
maintenance procedures listed above. I agree to notify DWQ of any problems with the systctn or prior to anv
changes to the system or responsible party.
Print name: Adesola Awomolo
Title' aAi e lr'
Address: 346 Royal Bluff Rd. Jacksonville, NC 285
Phone: C g f U. 'L/ .S S `S S
Signature:
Date!
Note: The legally responsible party should not be it homeowners association unless more than 50% of the lids have been sold and a
resident of the subdivision has been named the president.
1, ElixabOhA.Herndon , a Notary Public for the State of N r-01
County of D Vt� , do hereby certify that �6Cbf CL At.,r)L.,n `fI>
personally appeared before me this �5 day of DWM er T2z%�� and acknowledge the due
execution of the forgoing wet detention basin maintenance requirements. Witness my hand and official seal,
MOO A. Herndon
My commission expires `S 1'7 PPh8
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