SW8060813_CURRENT PERMIT_20061120

STORMWATER DIVISION CODING SHEET
POST -CONSTRUCTION PERMITS
PERMIT NO.
SW
DOC TYPE
E22CURRENT PERMIT
APPROVED PLANS
❑ HISTORICAL FILE
❑ COMPLIANCE EVALUATION INSPECTION
DOC DATE
YYYYMMDD

W A.rFR
November 20, 2006
Barbara Birkenheuer, Executive Director
Cape Fear Habitat for Humanity, Inc.
1208 S. Third Street
Wilmington, NC 28401
Subject- Stormwater Permit No. SW8 060813
Cornerstone Commons
High Density Subdivision Project
New Hanover County
Dear Ms. Birkenheuer:
Michael F. Easley, Governor
William G. Ross Jr., Secretary
North Carolina Department of Environment and Natural Resources
Alan W. Klimek, P.E. Director
Division of Water Quality
The Wilmington Regional Office received a complete Stormwater Management Permit
• Application for Cornerstone Commons on October 13, 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 060813,
dated November 20, 2006, for the construction of the subject project.
This permit shall be effective from the date of issuance until November 20, 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 1508 of the North, Carolina General Statutes, and filed with the Office of
Administrative Hearings, P.O. Drawer21447, 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].
Sincer ,
Edward Beck
Regional Supervisor
Surface Water Protection Section
ENBlari: S:1WQSISTORMWATERIPERMIT1060813.nov06
cc: C. Lawrence Sneeden, P.E., ESP Associates
Tony Roberts, New Hanover County Inspections
City of Wilmington Stormwater Services
Beth E. Wetherill, New Hanover County Engineering
Linda Lewis
Wilmington Regional Office No°ChCarolitla
Central Files Natum!!y
North Carolina Division of Water Quality 127 Cardinal Drive Extension Wilmington, NC 28405 Phone [phone] Cust omer Service
Wilmington Regional Office Intemet: www.ncwater unlit .or Fax [phone]
An Equal OpportunitylAffirmative Action Employer— 50% Recycledll0% Post Consumer Paper

State Stormwater Management Systems
Permit No. SW8 060813
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
Barbara Birkenheuer & Cape Fear Habitat for Humanity, Inc.
Conerstone Commons
Mosley Street, Wilmington, New Hanover County
FOR THE
construction, operation and maintenance of a wet detention pond in compliance with the
provisions of 15A NCAC 2H .1000 (hereafter referred to as the "stormwater rules') and
the approved stormwater management plans and specifications and other supporting
data as attached and on file with and approved by the Division of Water Quality and
considered a part of this permit.
This permit shall be effective from the date of issuance until November 20, 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 1.4 on page 3 of this permit. The subdivision is
permitted for 32 lots, each allowed a maximum {amount of built -upon area as
described in Section 11.12 of this permit} of 2,000 square feet of built -upon a rea.
3. Approved plans and specifications for this project are incorporated by reference
and are enforceable parts of the permit.
Page 2 of 9

State Stormwater Management Systems
Permit No. SW8 060813
4. The following design elements have been permitted for this wet detention pond
stormwater facility, and must be provided in the system at all times.
a. Drainage Area, acres:
Onsite, ft2:
Offsite, ft2:
b. Total Impervious Surfaces, ft2:
Lots at 2,000 ft2:
Roads/Parking, ft2:
Other, ft2:
Offsite, ft2:
C. Pond Depth, feet:
d. TSS removal efficiency:
e. Design Storm:
f. Permanent Pool Elevation, FMSL
g. Permitted Surface Area @PP ft2:
h. Permitted Storage Volume, ftJ:
i. Storage Elevation, FMSL:
j. Controlling Orifice:
k. Permanent Pool Volume, ft3:
I. Forebay Volume, ft3:
m. Maximum Fountain Horsepower:
n. Receiving Stream 1 River Basin:
o. Stream Index Number:
p. Classification of Water Body:
II. SCHEDULE OF COMPLIANCE
5.16
224,900
0
100,000
64,000
28,580
7,420
0
4.5
90%
1"
27.0
8,100
10,548
28.2
1.4" 0 pipe
21,308
4,015
118
UT Smith Creek 1 Cape Fear
CPF17 18-74-63
"C Sw"
No homeownerllot.ownerldeveloper shall fill in, alter, or pipe any drainage feature
(such as swales) shown on the approved plans as part of the stormwater
management system without submitting a revision to the permit and receiving
approval from the Division.
2. The permittee is responsible for verifying that the proposed built -upon area for
the entire lot, including driveways and sidewalks, does not exceed the allowable
built -upon area. Once the lot transfer is complete, the built -upon area may not be
revised without approval from the Division of Water Quality, and responsibility for
meeting the built -upon area limit is transferred to the individual property owner.
3. If an Architectural Review Board or Committee is required to review plans for
compliance with the BUA limit, the plans reviewed must include all proposed
built -upon area. Any approvals given by the Board do not relieve the homeowner
of the responsibility to maintain compliance with the permitted BUA limit.
4. 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 the approved plans, regardless of size.
b. Project name change.
C. Transfer of ownership.
d. Redesign or addition to the approved amount of built -upon area.
e. Further subdivision, acquisition, or sale of 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.
Page 3 of 9

State Stormwater Management Systems
Permit'No. SW8 060813
5. The Director may determine that other revisions to the project should require a
modification to the permit.
6. 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.
7. 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.
8. 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.
9. During construction, erosion shall be kept to a minimum and any eroded areas of
the system will be repaired immediately.
10. 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.
11. If the stormwater system was used as an Erosion Control device, it must be
restored to design condition prior to operation as a stormwater treatment device, .
and prior to occupancy of the facility.
12. Permanent seeding requirements for the stormwater control must follow the
guidelines established in the North Carolina Erosion and Sediment Control
Planning and Design Manual.
13. The permittee shall at all times provide the operation and maintenance
necessary to assure that all components of the permitted stormwater system
function at optimum efficiency. The approved Operation and Maintenance Plan
must be followed in its entirety and maintenance must occur at the scheduled
intervals including, but not limited to:
a. Semiannual scheduled inspections (every 6 months).
b. Sediment removal.
c. Mowing and revegetation of side slopes.
d. Immediate repair of eroded areas.
e. Maintenance of side slopes in accordance with approved plans and
specifications.
f. Debris removal and unclogging of structures, orifice, catch basins and
piping.
g. Access to all components of the system must be available at all times.
14. Records of maintenance activities must be kept and made available upon
request to authorized personnel of DWQ. The records will indicate the date,
activity, name of person performing the work and what actions were taken.
Page 4 of 9

State Stormwater Management Systems
Permit No. SW8 060813
15. 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.
16. Prior to the sale of any lot, the following deed restrictions must be recorded:
a. The following covenants are intended to ensure ongoing compliance with
State Stormwater Management Permit Number SW8 060813, as issued
by the Division of Water Quality under NCAC 2H.1000..
b. The State of North Carolina is made a beneficiary of these covenants to
the extent necessary to maintain compliance with the Stormwater
Management Permit.
C. These covenants are to run with the land and be binding on all persons
and parties claiming under them.
d. The covenants pertaining to stormwater may not be altered or rescinded
without the express written consent of the State of North Carolina, Division
of Water Quality.
e. Alteration of the drainage as shown on the approved plans may not take
place without the concurrence of the Division of Water Quality.
f. The maximum built -upon area per lot is 2,000 square feet. This allotted
amount includes any built -upon area constructed within the lot property
boundaries, and that portion of the right-of-way between the front lot line
and the edge of the pavement. Built upon area includes, but is not limited
to, structures, asphalt, concrete, gravel, brick, stone, slate, coquina and
parking areas, but does not include raised, open wood decking, or the
water surface of swimming pools.
g. The runoff from all built -upon areas on the lot must drain into the permitted
system: This may be accomplished through providing. roof drain gutters
which drain to the street, grading the lot to drain toward the street, or
grading perimeter swales and directing them into the pond or street. Lots
that will naturally drain into the system are not required to provide these
measures.
h. Built -upon area in excess of the permitted amount will require a permit
modification.
17. A copy of the recorded deed restrictions must be submitted to the Division within
30 days of the date of recording the plat, and prior to selling lots. The recorded
copy must contain all of the statements above, the signature of the Permittee, the
deed book number and page, and the stamp/signature of the Register of Deeds.
18. Prior to transfer of the permit, the stormwater facilities will be inspected by DWQ
personnel. The facility must be in compliance with all permit conditions. Any
items not in compliance must be repaired or replaced to design condition prior to
the transfer. Records of maintenance activities performed to date will be
required.
Page 5of9

State Stormwater Management Systems
Permit No. SW8 060813
19. 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 the fountain's pump is based on the
permanent pool volume. The maximum pump power for a fountain in this
pond is specified in Section 1.4 (m) of this permit.
20. Built upon area includes, but is not limited to, structures, asphalt, concrete,
gravel, brick, stone, slate, coquina and parking areas, but does not include
raised, open wood decking, or the water surface of swimming pools.
III. GENERAL CONDITIONS
This permit is not transferable to any person or entity except after notice to and
approval by the Director. In the event there is either a desire for the facilities to
change ownership, or there is a name change of the Permittee, a
"Name/Ownership Change Form" must be submitted to the Division of Water
Quality accompanied by appropriate documentation from the parties involved.
This may include, but is not limited to, a deed of trust, recorded deed restrictions,
Designer's Certification and an Operation and Maintenance plan signed by the
new applicant. The project must be in good standing with DWQ. The approval of
this request will be considered on its merits and may or may not be approved.
2. The permittee is responsible for compliance with. all of the terms and conditions . .
of this permit until such time as the Director approves the transfer request:
3. Failure to abide by the conditions and limitations contained in this permit may
subject the Permittee-to enforcement action by the Division of Water Quality, in
-accordance with North Carolina General Statute 143-215.6A to 143-215.6C.
4. The issuance of this permit does not preclude the Permittee from complying with
any and all statutes, rules, regulations, or ordinances, which may be imposed by
other government agencies (local, state, and federal), which have jurisdiction.
5. In the event that the facilities fail to perform satisfactorily, including the creation of
nuisance conditions, the Permittee shall take immediate corrective action,
including those as may be required by this Division, such as the construction of
additional or replacement stormwater management systems.
6. The permit may be modified, revoked and reissued or terminated for cause. The
filing of a request for a permit modification, revocation and reissuance or,
termination does not stay any permit condition.
7. Permittee grants permission to staff of the DWQ to access the property for the
purposes of inspecting the stormwater facilities during normal business hours.
8. The permittee shall notify the Division in writing of any name, ownership or
mailing address changes within 30 days.
9. A copy of the approved plans and specifications shall'be maintained on file by
the Permittee for a minimum of ten years from the date of the completion of
construction.
Page 6 of 9

State Stormwater Management Systems
Permit No. SW8 060813
Permit issued this the 20th day of November 2006.
NORTH CAROLINA ENVIRONMENTAL MANAGEMENT COMMISSION
Division of Water Quality
By Authority of the Environmental Management Commission
Permit Number SW8 060813
Page 7 of 9

State Stormwater Management Systems
Permit No. SW8 060813
Cornerstone Commons
Stormwater Permit No. SW8 060813
New Hanover County
Designer's Certification
Page 1 of 2
as a duly registered in
the State of North Carolina, having been authorized to observe (period icallylweeklylfull
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 are a part of this Certification.
Noted deviations from approved plans and specifications:
Signature
Registration Number
Date
SEAL
Page 8 of 9

State Stormwater Management Systems
Permit No. SW8 060813
Certification Requirements:
Page 2 of 2
1. The drainage area to the system contains approximately the permitted
acreage.
2. The drainage area to the system contains no more than the permitted
amount of built -upon area.
3. All the built -upon area associated with the project is graded such that the
runoff drains to the system.
4. 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 a.rea 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, a
forebay, and the vegetated filter.
15. The required dimensions of the system are provided, per the approved
plan.
cc: NCDENR-DWQ Regional Office
Tony Roberts, New Hanover County Building Inspections
Page 9 of 9 .

ESP #TB35.400
o e.w IJuwber
"C,)d- �_—ZCC��O State of North Carolina
M16—r3- ZO Department of Environment and Natural Resources
Division of Water Quality
STORMWATER MANAGEMENT PERMIT APPLICATION FORM
This form may be photocopied for use as an original
I. GENERAL INFORMATION
1. Applicants name (specify the name of the corporation, individual, etc. who owns the project):
Cape Fear Habitat for Humanity, Inc. _
2. Print Owner/Signing Official's name and title (person legally responsible for facility and compliance):
Barbara Birkenheuer. Excutive Director
3. Mailing Address for person listed in item 2 above:
1208 South Third Street
City: Wilmington State: NC Zip: 28401
Telephone Number: [phone]
4. Project Name (subdivision, facility, or establishment name — should be consistent with project name on
plans, specifications, letters, operation and maintenance agreements, etc.):
Cornerstone Commons
5. Location of Project (street address) -
Mosley Street
City: Wilmington County: New Hanover
6. Directions to project (from nearest major intersection):
From the intersection of US117 and US74 Bus. go west on US74 Bus. to intersection of US74
Bus. and Princess Place Dr. Go west on Princess Place Drive to intersection of Princess Place
Dr. and Mosley St. Go north on Mosley St. site is 1/4 mile on east side of Mosley St.
7. Latitude: 3401453
Longitude: 770 53 57
S. Contact person who can answer questions about the project:
Name: -13aay- D.._AAi#s#eIE C. L2wrei[- Sieedeg Telephone Number:
II. PERMIT INFORMATION
Specify whether project is (check one)
X New Renewal
of project
910) 313-6648
Modification
Form SWU-101 Version 3.99 Page 1 of 4

2. If this application is being submitted as the result of a renewal or modification to an existing permit, list the
Existing permit number NIA And its issue date (if known) NIA
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 NPDES Stormwater
Information on required state permits can be obtained by contacting the Customer Service Center at
1-977-623-6748.
II1. PROJECT INFORMATION
In the space provided below, summarize how stormwater will be treated. Also attach a detailed narrative
1 (one to two pages) describing stormwater management for the project.
Curb outlets to storm drain pipes to a wet detention basin.
2. Stormwater runoff from this project drains to the
3. Total Project Area: 5.16 AC
Cape Fear River Basin.
4. Project Built Upon Area: 33
5. How many drainage areas does the project have? 1
O/Q
6. Complete the following information for each drainage area. If there are more than two drainage areas in the
project, attach an additional sheet with the information for each area provided in the same format as below.
Basin Information
Drainage Area 1
Draina e.Area 2
Receiving Stream Name
UT to Smith Creek
Receiving Stream Class
C-SW
Drainage Area
5.16 AC
Existing Impervious * Area
0
Proposed Impervious* Area
74213 sf 11.70 AC
% Impervious* Area (total)
33%
Impervious* Surface Area
Drainage Area 1
Drainage Area 2
On -site Buildings
64,000 SF 1 1.47 AC
On -site Streets
28,580 SF 10.66 AC
On -site Parking
On -site Sidewalks
7,420 SF 10.17 AC
Other on -site
0
Off -site
0
Total: 100,000 SF / 2.29 AC
Total:
* lmpervious 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 4

How was the off -site impervious area listed above derived?
NIA
IV. DEED RESTRICTIONS AND PROTECTIVE COVENANTS ---- Se,,
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.
The following covenants are intended to ensure ongoing compliance with state storm water management erimt
�ber as issued by the Division of Water Quality. These enants may
not
2. No more than
or deleted without lire consent of the State.
Impervious material
wood decking or the
square feet of any lot shall be
asphalt, gravel, concrete, brick, store,
face of swimming pools.
3. Swales shall not be filled in, piped,
�ed _ structures or impervious materials.
or similar material but do not include
as necessary to provide driveway crossings.
4. Built -upon area in excess of the per ' ed atnow �uirestate storinwater management permit mortification
prior to construction.
5. All permitted ri from outparcels or future development shall be i d into the pernitted storinwater control
system. T e connections to the storm water control system shall be perform a manner that maintains' the
rote and perfortnnance of the systent 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 (9I9) 733-5083 for
the status and availability of these farms.
Form SWU-102
Form SWU-103
Form SWU-104
Form SWU-105
Form SWU-106
Form SWU-107
Form SWU-108
Form SWU-109
Wet Detention Basin Supplement
Infiltration Basin Supplement
Low Density Supplement
Curb Outlet System Supplement
Off -Site System Supplement
Underground Infiltration Trench Supplement
Neuse River Basin Supplement
Innovative Best Management Practice Supplement
Form SWU-101 Version 3.99 Page 3 of 4

D
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.
l . 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 e e'
• One copy of the applicable supplement form(s) for each BMP Cca
• Permit application processing fee of $420 (payable to NCDENR)..�
• Detailed narrative description of stormwater treatment / management �a
• 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
- 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 firm so that they may provide information on your
behalf, please complete this section.
Designated agent (individual or firm): ESP Associates, P.A.
Mailing Address: 2120-B Capital Drive
City: Wilmin
Phone: [phone]
VIII. APPLICANT'S CERTIFICATION
State: 1JC
Fax: [phone]
Zip: 28405
I, (print or type name of person listed in General Information, item 2) Barbara Birkenheuer
Certify that the information included on this permit application form is, to the best of my knowledge, correct and
that the project will be constructed in conformance with the approved plans, that the required deed restrictions and
protective covenants will be recorded, and that the proposed project complies with the requirements of 15A NCAC
2H.1000. ---7
Signature:
Date: 9/g/o6
Form SWU-101 Version 3.99 Page 4 of 4

ESP #TB35.400
Permit No.
State of North Carolina (to be provided by DWQ)
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: Cornerstone Commons
C. Lawrence Sneeden, Jr.
Contact Person: PE Phone Number:
For projects with multiple basins, specify which basin this worksheet applies to
elevations
Basin Bottom Elevation 22.5 ft.
Permanent Pool Elevation 27.0 ft.
Temporary Pool Elevation 28.2 ft.
[phone]
1
(floor of the basin)
(elevation of the orifices)
(elevation of the discharge structure overflow)
areas
Permanent Pool Surface Area 8,100 sq. ft. (water surface area at the orifice elevation)
Drainage Area 5.16 ac. (on -site and off -site drainage to the basin)
Impervious Area 2.30 ac. (on -site and off -site drainage to the basin)
volumes
Permanent Pool Volume
Temporary Pool Volume
Forebay Volume
Other parameters
SAIDA'
Diameter of Orifice
Design Rainfall
Design TSS Removal 2
21,308 cu. ft. (combined volume of main basin and forebay)
10,548 cu. ft. (volume detained above the permanent pool)
4015 cu. ft. (approximately 20% of total volume)
0.0350
1.4
1
90
(surface area to drainage area ratio frown DWQ table)
in. (2 to 5 day temporary pool draw -down required)
in.
% (minimum 85% required)
Form SWU-102 Version 3.99 Page 1 of 4

Footnotes:
When using the Division SA/DA tables, the correct SA/DA ratio for permanent pool sizing should be computed based upon the
actual impervious % and permanent pool depth. Linear interpolation should be employed to determine the correct value for non-
standard table entries.
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.
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
CC_ t a. The permanent pool depth is between 3 and 6 feet (required minimum of 3 feet).
G L- / b. The forebay volume is approximately equal to 20% of the basin volume.
C f— f c. The temporary pool controls runoff from the design storm event.
e e� d. The temporary pool draws down in 2 to 5 days.
e. if required, a 30-foot vegetative filter is provided at the outlet (include non -erosive flow
calculations.
4Ce_r
f. The basin length to width ratio is greater than 3:1.
Cfc.J g. The basin side slopes above the permanent pool are no steeper than 3:1.
C c�I h. A submerged and vegetated perimeter shelf with a slope of 6:1 or less (show detail).
e 9_1J i. Vegetative cover above the permanent pool elevation is specified.
cu
C
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.
C c f 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.
Z: L.J m. A mechanism is specified which will drain the basin for maintenance or an emergency.
III. WET DETENTION BASIN OPERATION AND MAINTENANCE AGREEMENT
The wet detention basin system is defined as the wet detention basin, pretreatment including forebays and the
vegetated filter if one is provided.
This system (check one) ❑ does
This system (check one) ❑ does
® does not incorporate a vegetated filter at the outlet.
® does not incorporate pretreatment other than a forebay.
Form SWU-102 Version 3.99 Page 2 of 4

Maintenance activities shall be performed as follows:
After every significant runoff producing rainfall event and at least monthly:
a. Inspect the wet detention 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 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 3.4 feet in the main pond, the sediment shall be removed.
When the permanent pool depth reads 3.0 feet in the forebay, the sediment shall be removed.
BASIN DIAGRAM
(fill in the blanks)
0 Permanent Pool Elevation 27.0
Sediment Re oval El. 24.0 75°
--------------- --- Sediment Removal Elevation 23.6 75%
Bottom El vation 23 5%------------------------------------- -----
Bottom Elevation 22.5 25%/
FOREBAY MAIN POND
5. Remove cattails and other indigenous wetland plants when they cover 50% of the basin surface. These
plants shall be encouraged to grow along the vegetated shelf and forebay berm.
6. If the basin must be drained for an emergency or to perform maintenance, the flushing of sediment through
the emergency drain shall be minimized to the maximum extent practical.
Form SWU-102 Version 3.99 Page 3 of 4

?. All components of the wet detention basin system shall be maintained in good working order.
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: Barbara Birkenheuer
Title: PerD✓`
Address: 1208 South Third St., Wilmington, NC 28401
Phone: 910 - 762-4744
Signature;
Date: Y/II/�/of
Note: The legally responsible party should not be a homeowners association unless more than 50% of the lots have been sold and
a resident of the subdivision has been named the president.
1, k0 MCA V. GO(Ab N L( fJ
County of AEPoE4-
a Notary Public for the State of P0P-A- CA"J,(N44
)do hereby certify that 6KMM &X2 &)(460"—
Personally appeared before me this day of A-06us ( 06 , and acknowledge the due
Execution of the foregoing wet detention basin maintenance requirements. Witness my hand and official seal.
Z�
NOTARY
-o PUBLIC V
�Il1��Rititittt SFAL-
, �lv�
Signature (,
My commission expires
Form SWU-102 Version 3.99 Page 4 of 4

-AUG 1 7 2006
In accordance with Title 15 NCAC 2H.1000, the Coastal Stormwater Management Regulations, deed
restrictions and protective covenants are required for High Density Residential Subdivisions where
lots will be subdivided and sold and runoff will be treated in an engineered stormwater control facility.
Deed restrictions and protective covenants are necessary to ensure that the development maintains a
"built -upon" area consisted ith th desi n criteria used to size the stormwater control facility.
I, ��f;
knowledge affirm and agree by my signature below, that
I -will cause the�following deed restrictions and covenants to be recorded prior to the sale of any lot:
1. The following covenants are intended to ensur ongoing compliance with State Stormwater
Management Permit Number f)Lu'gUC,U 57 as issued by the Division of Water Quality
under NCAC 2H.1000,
2. The State of North Carolina is made a beneficiary of these covenants to the extent necessary to
maintain compliance with the stormwater management permit.
3. These covenants are to run with the land and be binding on all persons and parties claiming
under them.
4. The covenants pertaining to stormwater may not be altered or rescinded without the express
written consent of the State of North Carolina, Division of Water Quality.
5. Alteration of the drainage as shown on the approved plan may not take place without the
concurrence of the Division of Water Quality.
6. The maximum allowable built -upon area per lot is 20041 square feet. This allotted
amount includes any built -upon area constructed within the lot property boundaries, and that
portion of the right-of-way between the front lot line and the edge of the pavement. Built upon
area includes, but is not limited to, structures, asphalt, concrete, gravel, brick, stone, slate,
coquina and parking areas, but does not include raised, open wood decking, or the water
surface of swimming pools.
OR, if the proposed built -upon areas per lot will vary, please REPLACE #6 above with the
following:
6. The maximum built -upon area per lot, in square feet, is as listed below:
Lot # BUA Lot # BUA Lot # BUA Lot # BUA
This allotted amount includes any built -upon area constructed within the lot property boundaries,
and that portion of the right-of-way between the front lot line and the edge of the pavement. Built
upon area includes, but is not limited to, structures, asphalt, concrete, gravel, brick, stone, slate,
coquina and parking areas, but does not include raised, open wood decking, or the water
surface of swimming pools.
7. All runoff from the built -upon areas on the lot must drain into the permitted system. This may be
accomplished through a variety of means including roof drain gutters which drain to the street,
grading the lot to drain toward the street, or grading perimeter swales to collect the lot runoff
and directing them into a component of the stormwater collection system. Lots that will naturally
drain into the s ster4pere not require 9 provide se additional measures.
Signature: Date:
a Notary Public in the
State of County of
do hereby.certify that 6 (/n4�fJi�-SV E1L personally appeared
before me this the day of A Q 6 fi5 j 20 0 (, and acknowledge
the due execution of the fore ing instrument. Witness my hand and official seal,
Si nature
% NOTARY
My Commission expires d� 1 �1 PUBLIC {y
C'CU�,```��

a
,,-,RE,.CEIVED
-AUG 3 02006
f-I
PROD #
IJ

ESP Associates, P.A.
-- - etigineeriny - surveyiiig - Nanninc
F'F'CEIVEIJ
211 Racine Drive
Wilmington, North Carolina 28405 [phone] - Phone BY:
[phone] - Fax
www.espassociates.com
Date:
Company:
Attention:
Address:
City/State/Zip:
We are Sending:
December 20, 2007
NC Division of Water Quality
Linda Lewis
127 Cardinal Drive
Wilmington, NC 28405
DEC 2 0 2007
Z i VAV5
�l-
E�
LETTER OF TRANSMITTAL
ESP Project Name: Cornerstone Commons
ESP Project Number: TB35.400 t
Qx Endosed
F7Change Order
Q Originals
F—Isamples
F-]Computalions
Sepia(s)
=LiteratureSpecifications
Print(s)
Copy of Letter
Diskette 1 CD
Set(s) of Plans
...............................
COPY T0:
(A) Addressee
(B) ESP Main Project File
(C) David Cowell, City of Wilmington
......................................................................... E
Under separate cover via
Copies
Dated
Sheet
Description
1
12/20/07
Stormwater Certification
These are Being Sent:
0
0
For Your Approval
For Your Use
For Your Review and Comment
For Your Signature
For Bids Due
By: D Courier
REMARKS:
❑
Approved as Noted
Corrected and Returned
Approved as Submitted
As Requested
Approved as Changed
0
Returned for Corrections
Returned After Loan to Us
UPS / Federal Express ❑ Mail Other
...............
: IMPORTANT NOTE TO RECIPIENT. Please FAX A SIGNED COPY
to ESP, to the senders affenf►on. THANK YOU.
...............................................................
Sender & Date Timothy T. Price, El 12/20/07
Signed & Date (Recipient)

f VA
State Stormwater Management Systems
Permit No. SW8D608l3
Cornerstone Commons
Stormwater Permit No. SW8 060813
New Hanover County_
Designer's Certification
Page 1 of 2
I, (-L nw�=��' � SNr dEa,��., as a duly registered ?9— E-elwt enin
the State of. North Carolina, having been authorized to obsery {period�*eklylfull
time) the construction of the project,
CortNe:e-. sG CvrMrto' J S
(Project)
for (HQw ��RY?- 14A s } r�T �k, Xm.4w, r`/ , ^'� (Project Owner) hereby state that, to the
best of my abilities, due care and d lii Bence was used in the observation of the project
construction such that the construction was observed to be built within substantial
compliance and intent of the approved plans and specifications.
The checklist of items on page 2 of this form are a part of this Certification.
Noted deviations from approved plans and specifications:
1, .At2SAs 17�5TJ'V`5ao FOP, (_Or.Ve,)prNGES AjD 'PDOPS -OAVG 13,5F
SF,soEO 'Arlo A�af; Ca�N�a+�c��y s;+�6,41z �. SaMi: Lv(.A-L Ar-F-A5 Aiw& PvT.
�s�A3tiSikt� ST Y,Z� V �G�Cr�cC �onJ �r� GO oa ar c'&kor-j P"JO
WILL - A OL)- (,o,,,JU. Aorj trvrz-" Rwo nNLt. NUT+L 5r+tr3i'C
VLZiG '-k-r-J Ev6o �
Signature
Registration Number
SE AL =
-
Date ; c) ; 10912
•F .
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State Stormwater Management Systems
Permit No. SW8 060813
Certification Requirements: Page 2 of 2
Gcr 1. The drainage area to the system contains approximately the permitted
acreage.
GG! 2. The drainage area to the system contains no more than the permitted
amount of built -upon area.
Gc-I 3. All the built -upon area associated with the project is graded such that the
runoff drains to the system.
c-c,, 4. All roof drains are located such.that the runoff is directed into the system.
G" 5. The outlet/bypass structure elevations are per the approved plan.
C c-f 6. The outlet structure is located per the approved plans.
G Lf 7. Trash rack is provided on the outlet/bypass structure.
G4f 8. All slopes -are grassed with permanent vegetation. 15 �J ors 1�
C 9. .Vegetated slopes are no steeper than 3:1.
GcJ 10. The inlets are located per the approved plans and do not cause short-
circuiting of the system.
11. The permitted amounts of surface a.rea and/or volume have been
provided.
cL-r 12. Required drawdown devices are correctly sized per the approved plans.
Ge-i 13. All required design depths are provided.
Cyr 14. All required parts of the system are provided, such as a vegetated shelf, a
forebay, and the vegetated filter. tom 2D
G1--f 15. The required dimensions of the system are provided, per the approved
plan.
cc: NCDENR-DWQ Regional Office
Tony Roberts, New Hanover County Building Inspections