SW8060840_CURRENT PERMIT_20061017

STORMWATER DIVISION CODING SHEET
POST -CONSTRUCTION PERMITS
PERMIT NO.
SW �7i�i�C7
DOC TYPE
� CURRENT PERMIT
❑ APPROVED PLANS
❑ HISTORICAL FILE
❑ COMPLIANCE EVALUATION INSPECTION
DOC DATE
�t,Pllp,j U 1
YYYYMMDD

o`'�F wA r�RQ�
0 �
October 17, 2006
Tom Spivey, District Manager
Southeast Brunswick Sanitary District
4335 Southport -Supply Road, SE
Southport, NC 28461
MllhaLl F Faslsy Governor
WilhatttG Rosslr Sa,cruary
North Caroline D4partmLnt of Environment and Natural Resources
Alan W KlimLk P E Dtrc�,tor
Division of WaturQuality
Subject- Stormwater Permit No. SW8 060840
Administration Building for SE Brunswick Sanitary District
High Density Project
Brunswick County
Dear Mr Spivey
The Wilmington Regional Office received a complete Stormwater Management Permit
Application for Administration Buidling for SE Brunswick Sanitary District on October 16, 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 060840 dated October 17, 2006, for the construction of the subject
project
This permit shall be effective from the date of issuance until October 17, 2016, and shall be
subject to the conditions and limitations as specified therein Please pay special attention to
the Operation and Maintenance requirements in this permit Failure to establish an adequate
system for operation and maintenance of the stormwater management system will result in
future compliance problems
If any parts, requirements, or limitations contained in this permit are unacceptable, you have
the right to request an adjudicatory hearing upon written request within sixty (60) days
following receipt of this permit This request must be in the form of a written petition,
conforming to Chapter 150E 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]
SinZrdecck
Regional Supervisor
Surface Water Protection Section
ENBIarI S IWQSISTORMWATERIPERMIT1060840 oct06
cc Denise Freund, P E , WK Dickson
Town of Southport Building Inspections
Linda Lewis
Wilmington Regional Office
Central Files
N? `thcarolina
Natima!!y
North Carolina Division of WaterQuahty 127 Cardinal Drive Extension Wilmington, NC 28405 Phone. [phone] Cus[onier Sorvicc
Wilmington Regional Utitce Internet ww%.nL%aterquahty o[g Fax [phone]p7-623-6748
An Equal Opportunily/Affirmative Action Employer — 50% Recycled110% Post Consumer Paper

State Stormwater Management Systems
Permit No SW8 060840
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
Tom Spivey & Southeast Brunswick Sanitary District
Administration Building for Southeast Brunswick Sanitary District
4240 Committee Drive, Southport, Brunswick County
FOR THE
construction, operation and maintenance of a wet detention pond in compliance with
the provisions of 15A NCAC 2H 1000 (hereafter referred to as the "stormwater rules')
and the approved stormwater management plans and specifications and other
supporting data as attached and on file with and approved by the Division of Water
Quality and considered a part of this permit
This permit shall be effective from the date of issuance until October 17, 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 16 on page 3 of this permit The stormwater
control has been designed to handle the runoff from 57,000 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 The built -upon area for the future
development is limited to 23,345 square feet
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

State Stormwater Management Systems
Permit No SW8 060840
[.1
The following design criteria have been provided in the wet detention pond and
must be maintained at design condition
a
b
d
e
f
9
k
I
I
m
n
Drainage Area, 9cres
Onsite, ft
Offsite, ftz
Total Impervious Surfaces, ftz
Des?gn Storm, inches
Pond Depth, feet
TSS removal efficiency
Permanent Pool Elevation FMSI�
Permanent Pool Surface Ares, ft
Permitted Storage Volume, ft
Temporary Storage Elevation, FMSL
Controlling Orifice
Permitted Forebay Volume, ft3
Max Fountain Horsepower
Receiving Stream/River Basin
Stream Index Number
Classification of Water Body
II SCHEDULE OF COMPLIANCE
1 81
78,900
0
57,000
40
90%
430
4,909
5,426
440
1"O pipe
1,873
1/8
Beaverdam Creek ! Cape Fear
CPF17 18-88-9-1-(0 5)
"SC Sw HQW"
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 Mowin,9 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
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 The facilities shall be constructed as shown on the approved plans This permit
shall become void unless the facilities are constructed in accordance with the
conditions of this permit, the approved plans and specifications, and other
supporting data
6 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
Page 3 of 7

State Stormwater Management Systems
Permit No SW8 060840
7 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 listed in Section
16 (1) of this permit
8 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
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
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
Page 4 of 7

State Stormwater Management Systems
Permit No SW8 060840
III 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 17th day of October 2006
NORTH AROLINA ENVIRONMENTAL MANAGEMENT COMMISSION
forAtdifW 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 060840
Administration Building for SE Brunswick Sanitary District
Stormwater Permit No SW8 060840
Brunswick 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,
(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 060840
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
Town of Southport Building Inspections
Page 7 of 7

J. <<` ,.,; `' 'OFFICE USE ONLY ,
Date Received
Fee Paid
Permit Number
25 dL
03
5W
H& q- /j- 2 oo(0
- ` ter, F40
State of North Carolina
Department of Environmental and Natural Resources
Division of Water Quality
STORMWATER MANAGEMENT PERMIT APPLICATION FORM
This form may be photocopied for use as an original
I. GENERAL INFORMATION
1 Applicants name (specify the name of the corporation, individual, etc who owns the project)
Southeast Brunswick Sanitary District
2 Print Owner/Signing Official's name and title (person legally responsible for facility and compliance)
Mr Tom Spivey, District Manager
3 Mailing Address for person listed in Item 2 above
4335 Southport -Supply Rd SE
City Southport
Telephone Number ( 910 ) 457-0006
State, NC._, Zip 2R461
4 Project Name (subdivision, facility, or establishment name — should be consistent with project name on plans,
specifications, letters, operation and maintenance agreements, etc )
Administration Building For The Southeast Brunswick Sanitary District
5 Location of Project (street address)
4240 Committee Drive
City Southport T County Brunswick
6 Directions to project (from nearest major intersection) From the intersection of NC 211 & NC 133 go west on NC 211
to Executive ParkBlvd, SR 1571 (1 95 mi_)Tum right on Executive Park Blvd (SR 1571) to Committee Dnve (480 Feet} Turn left
on Committee Dnve�The property is the second „parcel on the npht (620 feet)
7 Latitude 33 — 57 - 49 Longitude 78 — 04 - 56 of project
8 Contact person who can answer questions about the project
Name Denise Freund, PE Telephone Number ( 910 ) 762-4200
II. PERMIT INFORMATION:
l Specify whether project is (check one) X New Renewal Modification
Form S WU-101 Vernon 3 99 Page 1 of 4

J
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
I 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 treated by a wet detention basin designed for 90% TSS removal from the first
one inch of rainfall
2 Stormwater runoff from this project drams to the Cape Fear River Basin
3 Total Project Area 2 982 acres
4 Project Built Upon Area 72 %
5 How many drainage areas does the project have? I
6 Complete the following information for each drainage area If there are more than two drainage areas in the
project, attach and additional sheet with the information for each area provided in the same format as below
Basin Information
Drainage Area to Pond
Drainage Area 2
Receiving Stream Name
Beaverdam Creek
Receiving Stream Class
SC, Sw, HQW
Drainage Area
78,900 SF
Existm Im ervious*Area
NIA
Pro osed Impervious* Area
57,000 SF
% Impervious* Area Total
72 %
Impervious* Surface Area
Drainage Area 1
Drainage Area 2
On -Site Buildings
4,055 SF
On -Site Streets
NIA
On -Site Parking
27,450 SF
On -Site Sidewalks
1,150 SF
Other On -Site
1,000 SF
4€P&�e Future
23,345 SF
Total 57,000 SF
Total
*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

How was the off -site impervious area listed above derived? NA
IV. DEED RESTRICTIONS AND PROTECTIVE COVENANTS
The following italicized deed restrictions and protective covenants are required to be recorded for all
subdivisions, out parcels, and future development prior to the sale of any lot If lot saes vary significantly, a
table listing each lot number, size, and the allowable built -upon area for each lot must be provided as an
attachment
The following covenants are intended to ensure ongoing compliance with state stormwater management
permit number as issued by the Division of Water Quality These covenants may not
be changed or deleted without the consent of the State
l No more than square feet of TOTAL lot shall be covered by structures or impervious
materials Impervious materials include asphalt, gravel, concrete, brick, stone, slate or similar material but
not include wood decking or the water surface of swimming pools
3 Swales shall not be filled in, piped, or altered except as necessary to provide driveway crossings
4 Built -upon area in excess of the permitted amount requires a state stormwater management permit
modification prior to construction
S All permitted runoffftom the outparcels or future development shall be directed into the permitted
stormwater control system These connections to the stormwater control system shall be performed in a
manner that maintains the integrity and performance of the system as permitted
By your signature below, you certify that the recorded deed restrictions and protective covenants for this project
shall include all the applicable items required above, that the covenants will be binding on all parties and persons
claiming under them, that they will run with the land, that the required covenants cannot be changed or deleted
without concurrence from the State, and that they will be recorded prior to the sale of any lot
V. SUPPLEMENT FORMS
The applicable state stormwater management permit supplement form(s) listed below must be submitted for
each BMP specified for this project Contact the Stormwater and General Permits Unit at [phone] for
the status and availability of these forms
Form SWU-102
Wet Detention Basin Supplement
Form SWU-103
Infiltration Basin Supplement
Form SWU-104
Low Density Supplement
Form SWU-105
Curb Outlet System Supplement
Form SWU-106
Off -Site System Supplement
Form SWU-107
Underground Infiltration Trench Supplement
Form SWU-108
Neuse River Basin Supplement
Form SWU-109
Innovative Best Management Practice Supplement
Form SWU-101 Version 3 99 Page 3 of 4

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VI. SUBMITTAL REQUIREMENTS
Only complete application packages will be accepted and reviewed by the Division of Water Quality (DWQ) A
complete package includes all of the items listed below The complete application package should be submitted to
the appropriate DWQ Regional Office
Please indicate that you have provided the following required information by initialing in the space provided
next to each item.
Initials
• Original and one copy of the Stormwater Management Permit Application Form A"
• One copy of the applicable Supplement Form(s) for each BMP 0411
• Permit application processing fee of $420 (payable to NCDENO itE^trf e^to) OrMrh
• Detailed narrative description of stormwater treatment/management - JWM
• Two copies of plans and specifications, including SNM
-Development/ Project name
- Engineer and firm "
- Legend
- North arrow
-Scale
- Revision number & date
- Mean high water line
- Dimensioned property/project boundary
- Location map with named streets or NCSR numbers
- Original contours, proposed contours, spot elevations, finished floor elevations
- Details of roads, drainage features, collection systems, and stormwater control measures r
- Wetlands delineated, or a note on plans that none exist -
- Existing drainage (including off -site), drainage easements, pipe sizes, runoff calculations
- Drainage area delineated
- Vegetated buffers (where required) -41A.
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) WK Dickson & Co.. Inc. c/o Denisia Freund. PR_
Mailing Address 909 Market Street
City Wilmington State NC
Phone (910 ) 762-4200
VIII. APPLICANT'S CERTIFICATION
Zip 28401
Fax [phone]
1, Thomas per. District— Manager Southeast BrunswnckSamtary District
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 I SA
NCAC 2H 1000
Signature .�- Date 17( 1 l � 06
Farm SWU-101 Version 3 99 Page 4 of 4

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Permit No
(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 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 Administration Building for the Southeast Brunswick Sanitary District
Contact Person Denise Freund�PE Phone Number 910-762-4200
For projects with multiple basins, specify which basin this worksheet applies to
elevations
Basin Bottom Elevation
Permanent Pool Elevation
Temporary Pool Elevation
areas
Permanent Pool Surface Area
Drainage Area
Impervious Area
volumes
Permanent Pool Volume
Temporary Pool Volume
Forebay Volume
other parameters
SA/DA'
Diameter of Orifice
Design Rainfall
Design TSS Removal
z
Footnotes
39 ft (floor of the basin)
43_ ft (elevation of the orifice)
44 ft (elevation of the discharge structure overflow)
sq ft (water surface area at the orifice elevation)
1 . R 1 ac (on -site and off -site drainage to the basin)
1 309 ac (on -site and off -site drainage to the basin)
8,540 cu ft (combined volume of main basin and forebay)
5,426 cu ft (volume detained above the permanent pool)
119 3 cu ft (approximately 20% of total volume)
620 (surface area to drainage area ratio from, DWQ table)
—1 .. in (2 to 5 day temporary pool draw -down required)
I in
90_ - % (minimum 85% required)
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 depth Linear interpolation should be employed to determine the
correct value for nonstandard table entries
In the 20 coastal counties, the requirement for a vegetative filter may be waived if the wet detention basin is designed to
provide 90% TSS removal The NCDENR BMP manual provides design tables for both 85% TSS removal and 90%
TSS removal
Form SWi7-102 Rev 3 99 Pape. 1 of 4

U. 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
ANM a The permanent pool depth is between 3 and 6 feet (required minimum of 3 feet)
/m b The forebay volume is approximately equal to 20% of the basis volume
614 c The temporary pool controls runoff from the design storm event
61461 1 d. The temporary pool draws down in 2 to 5 days
A e If required, a 30-foot vegetative filter is provided at the outlet (include non erosive flow calculations)
&M 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
11 i A trash rack or similar device is provided for both the overflow and onfice
144 k. A recorded drainage easement is provided for each basin including access to nearest nght-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
AW01 m A mechanism is specified which will dram 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 basm, pretreatment including forebays and the vegetated
filter if one is provided
This system (check one) 4 does [does not Incorporate a vegetated filter at the outlet.
This system (check one) 0 does &`d'o—es not Incorporate pretreatment other than a forebay.
Form SWU-102 Rev 3 99 Page 2 of

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Maintenance activities shall be performed as follows
After every significant runoff producing rainfall event and at least monthly
Inspect the wet detention basin system for sediment accumulation, erosion, trash accumulation, vegetated
cover, and general condition �
b Check and clear the onfice of any obstructions such that drawdown of the temporary pool occurs withm 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
Inspect and repair the collection system (i a catch basins, piping, swales, nprup, etc ) quarterly to maintain proper
fimctiomng
4 Remove accumulated sediment from the wet detention basin system semi-annually or when depth is reduced to
75% of the original design depth (see diagram below) Removed sediment shall be disposed of in an appropriate
manner and shall be handled in a manner that will not adversely impact water quality (i a 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 ALI' feet in the main pond, the sediment shall be removed
3.0 *0-1-2S.r P
When the permanent pool depth reads _.GL.._ feet in the forebay, the sediment shall be removed
BASIN DIAGRAM
(fill in the blanks)
Permanent Pool Elevation 113
Sediment oval El. y0 75 _. __
---------- Sediment Removal Elevation �d 7596
Bottom Ele oo
FOREBAY
Bottom Elevation _ 7 ♦ 25%
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 practical
7 All components of the wet detention basin system shall be maintained in good working order
Form SWU-102 Rev 3 99 Page 3 of 4

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I acknowledge and agree by my signature below that I am responsible for the performance of the seven
maintenance procedures listed above I agree to notify DWQ of any problems with the system or prior to any
changes to the system or responsible party
Print name Mr Tom Soive
Title District Manager
Address 4335 Southport -Supply Rd SE Sou NC 28461
Phone [phone]
Date / 4z
Signature
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, a Notary Public for the State of I JO{ CC CQ
County of l i S
2 u) i c do hereby certify that C)rrl
personally appeared before me this day of :J�J ju "?Cr-> (and acknowledge the due
execution of the forgoing wet detention basin maintenance requirements Witness my hand and official seal,
N0T-4J9` d'
'D�et.tic �
_I( CO
SEAL
My commission expires ` 'nct,Lc_ 3, pZ [71
Form SWU-102 Rev 3 99 Page 4 of 4

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WK
LETTER OF TRANSMITTAL DICKSON
community infrastructure consultants
909 Market Street
TO Mr Ed Beck
Wilmington, North Carolina 28401 910 762 4200 tel [phone] fax
DATE Aril 14, 2008
NCDENR
127 Cardinal Drive Extension RE. Designer Certification SBSD Admin Building
Wilmington, NC DWQ Permit N&_SW8060840,---j�
28405-3845 WKD Project No 60302 00 WL
We are sending via ❑ Overnight ® Regular Mail ❑ Pick-up ❑ Hand Delivered
The following items ❑ Correspondence ❑ Plans ❑ Specifications
COPIES
DATE
NO.
DESCRIPTION
1
4-10-08
Designer's Certification, Page 6 and Page 7
i
i
THESE ARE TRANSMITTED as checked below
® For Approval ❑ As Requested ❑ Approved as Submitted ❑ Returned for Corrections
❑ For Your Use ❑ For Review and Comment ❑ Approved as Noted ❑ Forward to Subcontractor
REMARKS
Please let me know if you have anv auestions Thank you
R-MCEYVED
COPY TO Tom Spivey, SBSD SIGNED �--
Bridget Flora, Brunswick Co Engineering Bryan McCabe, PE

State Stormv% it Manegernent Systems
Permit No SW$ 060840
Administration Building for SE Brunswick Sanitary District
Stormwater Permit No SW8 060840
Brunswick County
Designer's Certification
I, felife-44!.t , as a duly registered f ;,n in the
Stat of North Carolina, having been authorized to obse (periodical/ / weekly/ full
time) the construction of the project,
AA►M SA:tTM a�.n Bvll.�iNf t�r �Ky .So..wwfr` 6r.IN.ci .,•r
(Project) T
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 ..,
SEAL
Registration Number 33183
Date Y io oa _ T
Page 6 of 7

State Stormw- 'er Management Systems
IPermit No SW8 Q60840
Certification Requirements
ANN
1
The drainage area to the system contains approximately the permitted
acreage
,w,v 2
The drainage area to the system contains no more than the permitted
amount of built -upon area
Awm
3
All the built -upon area associated with the project is graded such that the
runoff drams to the system
,�wov 4
All roof drains are located such that the runoff is directed into the system
dew"
5
The outlet/bypass structure elevations are per the approved plan
/*'iy
6
The outlet structure is located per the approved plans
S "
7
Trash rack is provided on the outlet/bypass structure
J100"
8
All slopes are grassed with permanent vegetation
so,""
9
Vegetated slopes are no steeper than 3 1
,0*n
10
The inlets are located per the approved plans and do not cause short-
circuiting of the system
B1/"
11
The permitted amounts of surface area and/or volume have been
provided
_.sy
12
Required drawdown devices are correctly sized per the approved plans
$Oym
13
All required design depths are provided
w,w
14
All required parts of the system are provided, such as a vegetated shelf,
and a forebay
silm
15
The required system dimensions are provided per the approved plans
cc
NCDENR-DWQ Regional Office
Town of Southport Building Inspections
Page 7 of 7