SW8060725_CURRENT PERMIT_20061013

STORMWATER DIVISION CODING SHEET
POST -CONSTRUCTION PERMITS
PERMIT NO.
SW
DOC TYPE
c- CURRENT PERMIT
❑ APPROVED PLANS
❑ HISTORICAL FILE
❑ COMPLIANCE EVALUATION INSPECTION
DOC DATE
2�
YYYYMMDD

wAr�RpG
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October 13, 2006
Mr. Clifford Schwenker, Member Manager
Magnolia Trace Townhomes, LLC
416 Oceana Way
Carolina Beach, NC 28428
Subject: Stormwater Permit No. SW8 060725
Magnolia Trace Townhomes
High Density Project
New Hanover County
Dear Mr. Schwenker:
Michael F. Easley, Govcmur
William G. Ross Jr., Sccrctary
North Carolina Department of Environment and Natoral Resources
Alan W. Klimek, P.E. Director
Division of Water Quality
The Wilmington Regional Office received a complete Stormwater Management Permit
Application for Magnolia Trace Townhomes on September 11, 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 060725 dated October 13, 2006, for the construction of the subject project.
This permit shall be effective from the date of issuance until October 13, 2016, and shall be
subject to the conditions and limitations as specified therein. Please pay special attention to
the Operation and Maintenance requirements in this permit. Failure to establish an adequate
system for operation and maintenance of the stormwater management system will result in
future compliance problems.
If any parts, requirements, or limitations contained in this permit are unacceptable, you have
the right to request an adjudicatory hearing upon written request within sixty (60) days
following receipt of this permit. This request must be in the form of a written petition,
conforming to Chapter 150B of the North Carolina General Statutes, and filed with the Office of
Administrative Hearings, P.O. Drawer 27447, Raleigh, NC 27611-7447. Unless such demands
are made this permit shall be final and binding.
If you have any questions, or need additional information concerning this matter, please
contact Paul Bartlett, or me at [phone].
Sincerely,
Edward Beck
Regional Supervisor
Surface Water Protection Section
ENBlptb: S:1WQSISTORMWATERIPERMIT1060725.oct06
cc: Garry S. Pape, P.E., Withers & Ravenel, Inc.
Tony Roberts, New Hanover County Building Inspections
Beth E. Wetherill, New Hanover County Engineering
Paul T. Bartlett, P.E.
-Wilmington-Regional Office
Central Files
Onc
No[ihCarolina
Alatum!/Zy
North Carolina Division of Water Quality 127 Cardinal Drive Extension Wilmington, NC 28405 Phone [phone] Customer Service
Wilmington Regional Office Internet: w'y�+v.ricvtat� tv.org Fax [phone]
A Equal Opportunity/Affirmative Action Employer — 50% Recycled110% Post Consumer Paper

State Stormwater Management Systems
'f' M Permit No. SW8 060725
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
Clifford Schwenker and Magnolia Trace Townhomes, LLC
Magnolia Trace Townhomes
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 "storm water rules")
and the approved stormwater management plans and specifications and other
supporting data as attached and on fife 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 13, 2016, and
shall be subject to the following specified conditions and limitations:
1. DESIGN STANDARDS
1. This permit is effective only with respect to the nature and volume of stormwater
described in the application and other supporting data.
2. This stormwater system has been approved for the management of stormwater
runoff as described in Section 1.6 on page 3 of this permit. The stormwater
control has been designed to handle the runoff from 126,188 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 3,020 square feet (pool facility and future road
extension) which is included in the total permitted impervious area of 126,188
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 060725
6. The following design criteria have been provided in the wet detention pond. -and
must be maintained at design condition:
a. Drainage Area, 9cres: 4.69
Onsite, ft : 204,470
Offsite, ft2: None
b. Total Impervious Surface, ft2:
Onsite Buildings, ft
Onsite Parkinglpavement, ft?:
Onsite Sidewalks, ft
Other OS (pool/future road ext.), ft2:
G. 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:
1. Receiving Stream/River Basin:
M. Stream Index Number:
n. Classification of Water Body:
II. SCHEDULE OF COMPLIANCE
.126,188
69,380
47,708
6,080
3,020
1.0
5.0
90%
19.0
9,181
11,161
20.1
1.5" O pipe
4,643
UT Mott Creek 1 Cape Fear
18-82
"C' Sw"
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.
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.
Page 3 -of 7

State Stormwater Management Systems
Permit No. SW8 060725
5. Decorative spray fountains will be allowed ip 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 1/8 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

Sta'e Stormwater Management Systems
Permit No. SW8 060725
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.
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 13th day of October 2006.
NORTH ROLINA ENVIRONMENTAL MANAGEMENT COMMISSION
for AI imek, :E., Director
Division of Water Quality
By Authority of the Environmental Management Commission
Page 5 of 7

State Stormwater Management Systems
Permit No. SW8 060725
Magnolia Trace Townhomes
Stormwater Permit No. SW8 060725 Page 1 of 2
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,
(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 060725
Page 2 of 2
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
Tony Roberts, New Hanover County Building Inspections
Page 7 of 7

-7124- A,11�A
NCDENR
North Carolina Department of Environment and Natural Resources
127 Cardinal Drive, Wilmington NC 28405 [phone] FAX [phone]
Request for Express Permit Review
FILL-IN all information below and CHECK required Permit(s).
FAX or email to Cameron. [e-mail] along with a narrative and vicinity map of the project location.
Projects must be submitted by 9:00 A.M. of the review date, unless prior arrangements are made.
APPLICANT Name Marcus Schwenker
Company Soss & Schwenker, LLC
Address 4102 Emerson Street City/State Wilmington, NC Zip 28403 County New Hanover
-Phone Fax Email
PROJECT Name Maanolia Trace Townhomes
PROJECT SYSTEM(S) TRIBUTARY TO MOTT CREEK (STREAM NAME) Cape Fear RIVER BASIN
ENGINEER/CONSULTANT
Company Withers & Ravenel Inc. — Garry S. Pape, P.E
Address 7040 Wrightsville Avenue — City/State _ Wilmington, NC Zip 28403 County New Hanover
Phone [phone] Fax [phone] Email gpape(cDwithersravenel.com
---------------------------------------------------------------------------------------------------------------------------------------------------------------------
State or National Environmental Policy Act (SEPA, NEPA) — EA or EIS Required ❑ Yes ❑ No
❑ STREAM ORIGIN Determination; # of stream calls; Stream Name
❑ STORM_ WATER ❑ Low Density ® High Density -Detention Pond ❑ High Density -Other
Wetlands MUST be addressed below ❑ Low Density -Curb & Gutter ❑ High Density -Infiltration ❑ Off Site
❑ COASTAL ❑ Excavation & Fill ❑ Bridges & Culverts ❑ Structures Information
MANAGEMENT ❑ Upland Development ❑ Marina Development ❑ Urban Waterfront
-----------------------------------------------------------------------------------------------------------------------------------------------------------------------
❑ LAND QUALITY ❑ Erosion and Sedimentation Control Plan with acres to be disturbed.
--------------------------------------------------------------------------------------------------------------------------------------------------------------------------
WETLANDS (401) Wetlands on Property ® Yes ❑ No Isolated Wetlands on Property. ® yes ❑ No
Check all that app1V Wetlands Will Be Impacted ® Yes ❑ No Wetland Impacts.- 0.05 Acre(s)
Wetlands Delineation has been completed ® Yes ❑ No ❑ Buffers Impacted: Acre(s)
USA COE Approval of Delineation completed ® Yes ❑ No
404 Application in process wIUSACOE ❑Yes ❑No I Permit received from USACE ❑Yes []No
401 Application required []Yes ❑ No If Yes, ❑ Regular ❑ Express
------------------------------------------------------------------------------------------------------------------------------------------------------------------------
Additional fees, not to exceed 50% of the original Express Review permit application fee, may be charged for
subsequent reviews due to the insufficiency of the permit applications.
For DENR use only
SUBMITTAL DATES: Fee Split for multiple permits:
SW $
CAMA $
Las $
401 $ Total Fee Amount $

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VICINITY MAP
(N. T. S.)
NARRATIVE
THIS 6.42 ACRE SITE IS LOCATED OFF CAROLINA BEACH ROAD IN THE CITY OF
WILMINGTON. THE PROJECT PROPOSES DEVELOPMENT OF 50 TOWNHOUSE
UNITS WITH WET DETENTION POND THAT OUTFALLS INTO MOTT CREEK (C, Sw).
THE PRIMARY STORM WATER MEASURES WILL INCLUDE STORM GRATE INLETS
AND OVERLAND SHEET FLOW THAT CONVEY THE STORM WATER TO A WET
DETENTION POND.
MAGNOLIA TRACE TOWN HOMES
REQUEST FOR PRE -APPLICATION
MEETING FOR EXPRESS PERMIT REVIEW
MAY 31, 2006

I
h
,� .O.IICEoUSE ONLY,
_ _.
Date Received
Fee Paid
Permit Number
Mb 00
1 TOW OW7715--
State of North Carolina
Department of Environmental and Natural Resources
Division of Water Quality
STORMWATER MANAGEMENT PERMIT APPLICATION FORM
This form may he pholocopied for use as an original
I. GENERAL INFORMATION
l . Applicants name (specify the name of the corporation, individual, etc. who owns the project):
Magnolia Trace Townhomes, LLC
2. Print Owner/Signing Official's name and title (person legally responsible for facility and compliance):
Clifford Schwenker— Member Manager
3. Mailing Address for person listed in Item 2 above:
416 Oceana Way
City: Carolina Beach _ _ State:
T1 lephone Number: [phone]
Zip: 28428
4. Project Name (subdivision, facility, or establislunent name — should be consistent with project name on plans,
specifications, letters, operation and maintenance agreements, etc.):
Magnolia "f race Townhomes
5. Location of Project (street address):
Carolina Beacli Road. Wiiminuton. North Carolina
City: Wilmilwton County: New Hanover
6. Directions to project (from nearest major intersection):
From Monkey Junction in Wilmin gt on, take Carolina Beach Road approx 2 miles towards downtown and site
is on the right.
7. Latitude: 34' 09' 15" N Longitude: 770 54' 24" W of project.
8. Contact person who can answer questions about the project::
Name: Garry S. Pane_ PE Telephone Number: ( 910125E-9277
H. PERMIT INFORMATION:
1. Specify whether project is (clieck one): X New Renewal Modification
Form SWU-101 Version 3.99 Page 1 of

2. If this application is being submitted as the result of a renewal or modification to an existing pert -nit, 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 Sedimentation/Erosion Control 404/401 Permit NPDFS Stormwater
Information on required state permits can be obtained by contacting the Customer Service Center at
1-877-623-6748
III. PROJECT INFORMATION
1. In the space provided below, summarize how stormwater will be treated. Also attach a detailed narrative
(one to two pages) describing stormwater management for the project.
Stormwater will be treated by the use of wet detention pond
2. Stormwater runoff from this project drains to the Cape Fear River Basin.
3. Total Project Area: 6.42 acres.
4. Project Built Upon Area: 45.2 %.
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 and additional sheet with the information for each area provided in the same format as below.
Basin Information
Drainage Area I
Drainage Area 2
Receiving Stream Name
Unnamed Trib to Molt Creek
Receiving Stream Class
C ; Sw
Drainage Area
204,470 sf 4.69 ac
Existing Im ervious*Area
- 0 -
Pro osed Impervious* Area
126,188 sf --- 2.90 ac
% Impervious* Area `Total
61.7%
Im ervious* Surface Area
Drainage Area I
Drainage Area 2
On -Site Rooftops
69,390 sf
On -Site Streets
- 0 -
On -Site Parking/Pavement
47,708 sf
On -Site Sidewalks
6,080 sf
Other On -Site Pool Facility &
Future Road Extension
3,020 sf
Off -Site
- 0 -
Total:
126,188 sf --- 2.90 ac
*Impervious area is defined as the built upon area including, hilt not limited to, buildings, roads, parking areas,
sideivalks, gravel areas, etc.
Form SWU-101 Version 3.99 Page 2 of 4

7. How was the off -site impervious area listed above derived`?
IV. DEED RESTRICTIONS AND PROTECTIVE COVENANTS
The following italicized deed restrictions and protective covenants are required to be recorded for all
subdivisions, out parcels, and future devclopment 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 ongoulg compliance with state stornlwaler management
permil number as issued by the Division of Water Quality. These covenants play nol
he changed or deleted without the consent of the Stale.
2. No more than square feet of any lot shall he covered by structures or impervious materials.
Impervious nmlerials include asphalt, gravel, concrele, brick, stone, slate of similar material but not inchlde
wood decking of the waler suiface of swimming pools.
3. .Swales shall not be filled in, piped, or alleged except as necessary to provkle driveway crossings.
4. Built -upon area in excess of the permilted amount requires a state slormwaler management permit
modification prior to construction.
S. All permitted runoff from the oulparcels or future. development shall be Lhrected into the permitted
slorinwater conlrol system. These connections to the stormwater control system shall he petformed in a
manner that mainlalns the integrity and peiformance of the system as permitleel.
By your signature below, you certify that the recorded deed restrictions and protective covenants for this project
shail include all the applicable items required above, that the covenants will be binding on all parties and persons
claiming under than, 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 storn»vater management permit supplement form(s) listed below must be submitted for
each BM 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
NCUse River Basin Supplement
Forst 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 (DWQ). A
complete package includes all of the items listed below. The complete application package should be submitted to
the appropriate DWQ Regional Off ice.
1. Please indicate that you have provided the following required information by initialing in the space provided
next to each item.
• Original and one copy of the Stormwater Management Permit Application Form
• One copy of the applicable Supplement Fonn(s) for each 13MP
• Permit application processing fec of $420 (payable to NCDI?NR)
• Detailed narrative description of stormwater treatment/management
Two copies of plans and specifications, including:
- Development/ Project name
- Engineer and firm
- Legend
- North arrow
- Scale
- Revision number & date
- Mean high water line
- Dimensioned property/project boundary
- Location map with named streets or NCSR numbers
- Original contours, proposed contours, spot elevations, finished floor elevations
- Details of roads, drainage features, collection systems, and stormwater control measures
- Wetlands delineated, or a note on plans that none exist
- Existing drainage (including off -site), drainage easements, pipe sizes, runoff calculations
- Drainage areas delineated
- Vegetated buffers (where required)
VII. AGENT AUTHORIZATION
If you wish to designate authority to another individual or firen so that they may provide information on your
behalf, please complete this section.
Designated agent (individual or firm): Withers & Ravenel, Inc.
Mailing Address: _ 7040 Wrightsville Ave, Suite 101
City Wilmington State: NC
Phone: ( 910) 256-9277
VIII. APPLICANT'S CERTIFICATION
Zip: 28403
Fax: [phone]
I, (print or t)pe name rf person listed in Genercil Information, Item 2) Clifford Schwenker
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�lie proposed project complies with the requirements of 15A
NCAC 21-I.1000. _ -4 /�
Form SWU-101 Version 3.99 Page 4 of

6,11(106- leee
,SGJ0 060 72i
Permit No.
(to he 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
"Phis f rrn 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.
1. PROJECT INFORMATION
Project Name: M
Contact Person: G
lia Trace Town homes
S. Pape, PE
Phone Number: 910-256-9277
For projects with multiple basins, specify which basin this worksheet applies to:
elevations
Basin Bottom Elevation'
Permanent Pool Elevation
Temporary Pool Elevation
14.0 1t.
190 _ _ ft.
20.1 - ft.
areas
Permanent Pool Surface Area 9,181
Drainage Area 4_69
Impervious Area 2.90
volumes 14 10A -3/j06
Permanent Pool Volume 23,027
Temporary Pool Volume 11)
Forebay Volume . 4,643
other parameters
SA/DA'
Diameter of Orifice
Design Rainfall
Design "I'SS Removal
2
Footnotes:
(floor of the basin)
(elevation of the orifice)
(elev(16011 of the discharge structure ovei lon)
sq. ft. (water surface area at llze orifice elevation)
fie. (on -site and off -site clrrrilzcrge to the basin)
ac. (on -site and off site drainage to the basin)
cu. ft. (combined volume of main basin and forebay)
cu. ft. (volume detained above the permanent pool)
cu. ft. (approximately 20% of total volume)
4.42
1.5
I.0
90 %
(.vurface area to drainage area ratio fr•oln, DWQ table)
(2 to 5 day temporary pool draw -down required)
(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.
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.
Form S W U-102 Rev 3.99 Page I of 4

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.
App icants Initials
a. The permanent pool depth is between 3 and 6 feet (required minimum of 3 feet).
Sl b. The forebay volume is approximately equal to 20% of the basin volume.
c. The temporary pool controls runoff from the design storm event.
S` d. The temporary pool draws down in 2 to 5 days.
If required, a 30-foot vegetative filter is provided at the outlet (include non -erosive flow calculations)
�S10 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.
S h. A submerged and vegetated perimeter shelf with a slope of 6:1 or less (show detail).
S 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.
in. A mechanism is specified which will drain the basin for maintenance or an emergency.
III. WET DETENTION BASIN OPERATION AND MAINTENANCE AGREEMENT
The wet detention basin system is defined as the wet detention basin, pretreatment including forebays and the vegetated
filter if one is provided.
This system (check one) 0 does 6does not incorporate a vegetated filter at the outlet.
This system (check one) 0 does does not incorporate pretreatment other than a forebay.
Form S WU-102 Rev 3.99 Page 2 of 4

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
manner and shall be handled in a manner that will not adversely impact water quality (i.e. stockpiling near a wet
detention basin or stream, etc.).
The measuring device used to determine the sediment elevation shall be such that it will give an accurate depth
reading and not readily penetrate into accumulated sediments.
When the permanent pool depth reads
When the permanent pool depth reads
Sediment Re oval El. 75
Bottom Ele ation 4ti 0
FOREBAY
t"LT feet in the main pond, the sediment shall be removed.
l•ZS" feet in the forebay, the sediment shall be removed.
BASIN DIAGRAM
(fill in the blanks)
Permanent Pool Elevation tq�b
Sediment Removal Elevation 15.2,57 75%
Bottom Elevation 14„0 125%
uIAVil f717,11-11
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 I'age 3 of4

I acknowledge and agree by my signature below that I am responsible for the performance of the seven
maintenance procedures listed above. 1 agree to notify DWQ of any problems with the system or prior to any
changes to the system or responsible party.
Print name: Clifford Schwenker
Title: Member Manager
Address: 416 Occana Way, Carolina Beach, North Carolina 28428
Phone: [phone]
Date:
Signal
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, 1 L. LgD��e- a Notary Public for the State of
County of NOD �rloy2(- do hereby certify that C�Ly���nI�J�C1C'
personally appeared before me this day of due LS-�- 20C o and acknowledge the due
execution of the forgoing wet detention basin maintenance requirements. Witness my hand and official seal,
SEAL
My commission expires
Y
Form S W U-102 Rev 3.99 Page 4 of 4

State Stormwater Management Systems
Permit No. SW8 060725
Magnolia Trace Townhomes
Stormwater Permit No. SW8 060725
New Hanover Count
Designer's Certification
Page 1 of 2
1, Gkfr\AS-e3�� as a duly registered PVN,JVtW
in the State of Ndkth Carolina, -having been authorized to observe (periodically/ wee 1y1
full time) the construction of the project,
r
(Proje
—Z w n�cp-Q-->
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
.—b
Registration Number O 3t3>>
Date a '1Z212AIS,
Page 6 of 7

State Stormwater Management Systems
Permit No. SW8 060725
Page 2 of 2
Certification'Requirements:
1.
The drainage area to the system contains approximately the permitted
2.
acreage.
The drainage area to the system contains no more than the
permitted
amount of built -upon area.
All built -upon
�8.
the area associated with the project is graded such that the
runoff drains to the system.
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.
s
The outlet structure -is located per the approved plans,
i�__V7-
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.
2.
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
Tony Roberts, New Hanover County Building Inspections
Page 7 of 7