SW8020406_CURRENT PERMIT_20130108

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

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NC®ENR
North Carolina Department of Environment and Natural Resources
Division of Water Quality
Pat McCrory Charles Wakild, P. E. John E. Skvarla, III
Governor Director Secretary
January 8, 2013
Marina Nielsen, President
Avenir Community Association, Inc.
P.O. Box 15066
Wilmington, NC 28408
Subject: Stormwater Permit No. SW8 020406
Name/Ownership Change and Permit Extension
Avenir
High Density Subdivision Project
New Hanover County
Dear Ms. Nielsen:
On August 5, 2009, the Governor signed Session Law 2009-406. This law impacts any
development approval issued by the Division of Water Quality under Article 21 of Chapter 143 of
the General Statutes, which is current and valid at any point between January 1, 2008, and
December 31, 2010. The law extends the effective period of any stormwater permit that was set
to expire during this time frame up to three (3) years from its current expiration date. On August
2, 2010, the Governor signed Session Law 2010-177, which granted an extra year for an
extension of up to four (4) years.
On January 7, 2013, the Division of Water Quality (DWQ) received a request to transfer
ownership of the Stormwater Management Permit for the subject project from John D. Lennon,
previously of Avenir Development, LLC. Staff of the Division of Water Quality have inspected
the project, determined that the documentation is in order, and the site is in compliance with the
Stormwater permit requirements. The Division is hereby notifying you that permit SW8 020406
has been transferred on January 8, 2013, and shall be effective until September 11, 2016,
which includes the extensions. For your records, please find enclosed a copy of the permit, a
copy of the most recent inspection report, a copy of the Name/Ownership Change form
submitted on January 7, 2013, and a copy of the recorded amendment to the Declaration of
Covenants, Conditions, & Restrictions. The Declaration was amended to match the permit
restrictions for allowable built -upon area per Lot. Please keep this cover letter with the attached
copy of the permit, originally issued on September 11, 2002.
Please pay special attention to the conditions listed in this permit regarding the Operation
and Maintenance of the BMP(s), recordation of deed restrictions, procedures for changes of
ownership, transferring the permit, and renewing the permit. Failure to establish an
adequate system for operation and maintenance of the stormwater management system, to
record deed restrictions, to transfer the permit, or to renew the permit, will result in future
compliance problems. Any modifications to this project must be submitted to the Division of
Water Quality and approved prior to construction. The issuance of this approval does not
preclude you from complying with all other applicable statutes, rules, regulations or
ordinances, which may have jurisdiction over the proposed activity, and obtaining a permit
or approval prior to construction.
Wilmington Regional Office
127 Cardinal Drive Extension, Wilmington, North Carolina 28405
Phone: W-796-72151 FAX: [phone] DENR Assistance: 1-877-623-6748
Internet: www.ncwatergnality.org
An Fnual (lnnnrtunity 1 Affnnntive Arlinn Fmnlnvar

If any parts, requirements, or limitations contained in this permit are unacceptable, you have the
right to request an adjudicatory hearing by filing a written petition with the Office of
Administrative Hearings (OAH). The written petition must conform to Chapter 150E of the North
Carolina General Statutes, and must be filed with the OAH within thirty (30) days of receipt of
this permit. You should contact the OAH with all questions regarding the filing fee (if a filing fee
is required) and/or the details of the filing process at 6714 Mail Service Center, Raleigh, NC
27699-6714, or via telephone at 919-431-3000, or visit their website at www.NCOAH.com.
Unless such demands are made this permit shall be final and binding.
If you have any questions, need additional copies of the permit or approved plans, please
contact Steve Pusey with the Division of Water Quality in the Wilmington Regional Office at
[phone].
Sinc rely,
VCL&10
sJJ r
fo, Charles Wakild, P,E., Director
Division of Water Quality
GDS/sgp: S:1WGS1Stormwater\Permits & Projects120021020406 HD12013 01 permit 020406
Enclosures: Permit, Inspection report, Name/Ownership Change form, & Amendment to Declaration
cc: John D. Lennon
Phil Tripp, PE — Tripp Engineering, PC
New Hanover County Inspections
Beth E. Wetherill — New Hanover County Engineering
Wilmington Regional Office Stormwater File
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2

State Stormwater Management Systems
Permit No. SW8 020406
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 1S HEREBY GRANTED TO
Avenir Community Association, Inc.
Avenir
New Hanover County
FOR THE
construction, operation and maintenance of three underground infiltration trench systems 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 September 11, 2016, and shall be
subject to the following specified conditions and limitations:
I. DESIGN STANDARDS
This permit is effective only with respect to the nature and volume of stormwater
described in the application and other supporting data.
2. This stormwater system has been approved for the management of stormwater runoff as
described on page 3 of this permit, the Project Data Sheet. The stormwater control has
been designed to handle the runoff frorn 12,486 ft2, 9,895 ft2, and 63,567 ftlof impervious
area. The bypassed design storm must pass through a 50' vegetated filter prior to
discharge.
The tract will be limited to the amount of built -upon area indicated on page 3 of this
permit, and per approved plans.
4. All stormwater collection and treatment systems must be located in either dedicated
common areas or recorded easements. The final plats for the project will be recorded
showing all such required easements, in accordance with the approved plans.
The runoff from all built -upon area within the permitted drainage area of this project must.
be directed into the permitted stormwater control system. A permit modification must be
submitted and approved prior to the construction of additional built -upon area from
outside of the approved drainage area.
-3

State Stormwater Management Systems
Permit No. SW8 020406
DIVISION OF WATER QUALITY
PROJECT DESIGN DATA SHEET
Project Name:
Avenir
Permit Number:
SW8 020406
Location:
New Hanover County
Applicant:
Mr. Christopher G. Yerkes, Manager
Mailing Address:
Avenir Development, LLC
PO Box 2473
Wilmington, NC 28402
Application Date:
September 6, 2002
Receiving Stream/River Basin/Index #:
Cape Fear 1 Elewlett's Creek
/ 18-87-26
Classification of Water Body: "SA"
'French Number:
1 2
3A 3B
Trench Depth, feet:
4' 4'
4' 4'
Trench Length x Width, feet:
65x25 108x 15
263x 15 160x25
Pipe Size/Length, feet:
8'7120 811/110
12"/260 8"/338
12' /55 12"198
12V 190
'french Bottom Elevation, FMSL:
15.5 13.5
10.25 10.25
Drainage Area, acres:
.55 .70
3.24 (3A & 3B)
Total Impervious Surfaces, ft2:
12,486 9,895
63,567 (3A & 313)
Offsite Area entering Pond, ft2:
none, per Engineer
Required Storage Volume, 113:
1,845 1,754
9,885 (3A & 313)
Provided Storage Volume, ft':
2,651 2,661
12,996 (3A & 3B)
`temporary Storage Elevation, FMSL:
19.5 I T5
14.25 (3A & 3B)
I'ype of Soil:
Sand
Seasonal High Water Table Elevation:
8.25 FMSL (All trenches)
Expected Infiltration Rate:
2 inches per hour
Time to Draw Down, hours:
7 6.5
15
4

State Stormwater Management Systems
Permit No. SW8 020406
11. SCHEDULE OF COMPLIANCE
1. The stormwater management system shall be constructed in it's entirety, vegetated and
operational for its intended use prior to the construction of any built -upon surface.
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 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 bypass structures, flow spreader, vegetated
filter, catch basins and piping.
g. Access to the bypass structures 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.
Decorative spray fountains will not be allowed in the stormwater treatment system.
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.
The Division does not recommend use of the infiltration system as an Erosion Control
device. If it is, the system must be restored to design condition prior to operation as a
stormwater treatment device, and prior to occupancy of the facility.
9. 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 drainage area.
e. Further subdivision, acquisition, or sale of the project area. The project area is
defined as all property owned by the permittee, for which Sedimentation and
Erosion Control Plan approval or a CAMA Major permit was sought.
f. Filling in, altering, or piping of any vegetative conveyance shown on the approved
plan.

State Stormwater Management Systems
Permit No. SW8 020406
I0. The permittee shall submit final site layout and grading plans for any permitted future
areas shown on the approved plans, prior to construction. If the proposed BUA exceeds
the amount permitted under this permit, a modification to the permit must be submitted
and approved prior to construction.
11. 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.
12. Prior to the sale or lease of any portion of the property, the permittee shall notify DWQ
and provide the name, mailing address and phone number of the purchaser or leasee. An
access/maintenance easement to the stormwater facilities shall be granted in favor of the
permittee if access to the stormwater facilities will be restricted by the sale or lease of any
portion of the property.
13. The permittee must maintain compliance with the proposed built -upon area and ensure
that the runoff from all the built -upon is directed into the permitted system.
14. 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 there is a desire for the facilities to change ownership, or there is a name change of
the Permittee, a formal permit request must be submitted to the Division of Water Quality
accompanied by an application fee, 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. Responsibility for compliance
with all permit conditions remains with the Permittee until such time as the Division .
approves the formal permit 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) which have jurisdiction.
4. In the event that the facilities fail to perform satisfactorily, including the creation of
nuisance conditions, the Permittee shall take immediate corrective action, including those
as may be required by this Division, such as the construction of additional or replacement
stormwater management systems.
The 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. 'Che 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 project must follow
the guidelines established in the North Carolina Erosion and Sediment Control Planning
and Design Manual.

State Stormwater Management Systems
Permit No, SW8 020406
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 I I th day of September, 2002.
NORTH CAROLINA ENVIRONMENTAL MANAGEMENT COMMISSION
I C t,- 4 1 n A-, , QzJ
Alan W. Klimek, P.E., Director
Division of Water Quality
By Authority of the Environmental Management Commission
on

II. CURRENT PERMIT INFORMATION
1. Stormwater Management Permit Number: w S cao /06
2. Project Name: Ruen'l r
3. Current Permitee's Company Name/Organization: ue.n' r 0e ue
4. Signing Official's Name: :56 + \ , LS ny--©r _Title: (ilonr
5. Mailing Address: GJA 1 1Oao
City: i o r1 State: N6 zip: 98 V0 3
6. Phone: R( f 0) d� 3 q-, gS Fax: (9'JO) c�•©�-o? �0 T
III. PROPOSED PERMITTEE / OWNER / PROJECT / ADDRESS INFORMATION
The proposed permittee identified in the condominium or planned community's declaration is the
following (check one):
❑ Unit Owners Association SCEOVE
Owners Association JAN 0 ] 2013
❑ Other Management Entity BY:
Proposed Permittee's: n
1. Company Name/Organization: lJCntf MMon_il�toSSOCI
2. Contact Name & Title (Please provide name of com pany/organ izati on's authorized representative or agent
and her/his official title such as President):
3. Mailing Address; �, o� (a&
City: W+ � O-1 i 0 State: _zip: 02 t Q
4. Phone: C,� �] _ Fax:
IV. CURRENT PjERMITTEE'S CERTIFICATION
I, A 61 o me (I � L-� C the current permittee, am submitting this request for
a transfer of stormwater permit # vS.2 QqQ _ -. I hereby attest that I have met the
requirements of N.C.G.S. 143-214.7(c2)/ Session Law 2011-256, and propose to transfer the permit
to a unit owners association, owners association, or other management entity identified in the
condominium or planned community's declaration. The common areas related to the operation and
maintenance of the stormwater management system have been conveyed to the unit owners
association or owners association in accordance with the declaration. I have provided a copy** of the
most recent permit, the designer's certification for each BMP, any recorded deed restrictions,
covenants, or easements, the DWQ approved plans and/or approved as -built plans, the approved
operation and maintenance agreement, past maintenance records, and the DWQ stormwater
inspection report evidencing compliance to the proposed permittee named in Section III of this form.
I further attest that this request for a permit transfer is accurate and complete to the best of my
knowledge. I understand that if all required parts of this request are not completed or if all required
supporting information and attachments listed above are not included, this request package will be
Page 2 of 3

.returned as incomplete. I assign all rights and obligations as permittee to the proposed permittee
named in Section II of this form. I understand that this permit transfer cannot be approved by the
DWO unless an'd.ujgtil the facility is in compliance with the permit.
Signature:
Date: 9'
a Notary Public for the State of
-M_-nL C�pf� rvA ,County of r�"w�,N�/L (Z , do hereby certify that
i,—r.rr-'ror'1 personally appeared before me this the
29 day of t) (',U 5 i , 20 l2 , and acknowledge the due execution of the
forgoing it
,ent. witness my hand and official seal, (Notary Seal)
No r_y Sig re
0 \0'[ARY
-.t 1AY p1Ms
J co+ µ' ZX a
*" It is recommended that all documents that are required for the transfer of this permit be
sent by a traceable delivery method to the proposed permittee.
Additional copies of the original permit and the approved Operation and Maintenance agreement can
be obtained from the appropriate Regional Office of the Division of Water Quality.
This completed form, including all supporting documents and the processing fee (if required), should be sent to the
appropriate Regional Office of the North Carolina Department of Environment and Natural Resources, Division of Water
Quality, as shown on the attached map.
DWQ Regional Off
Asheville Office ......
[phone]
Fayetteville Office ...
[phone]
Mooresville Office ...
[phone]
Raleigh Office ........
[phone]
Washington Office ...(252)
946-6481
Wilmington Office ...
[phone]
Winston-Salem ......
[phone]
Central Office .........(919)
807-6300
11 1AN 0 7 2013
BY:
Page 3 of 3

NCDENR
North Carolina Department of Environment and Natural Resources
Division of Water Quality
Beverly Eaves Perdue Coleen H. Sullins
Governor Director
STATE STORMWATER PERMIT TRANSFER REQUEST FORM
(Pursuant to N.C.G.S. 143-214.7(c2)/Session Law 2011-256)
Dee Freeman
Secretary
This request form is for a transfer of the stormwater permit from a current permittee who is the
declarant of a condominium or declarant of a planned community (as defined in Chapter 47C or
Chapter 47F of the General Statutes, respectively) to a unit owners association, owners association,
or other management entity identified in the condominium or planned community's declaration
pursuant to N.C.G.S. 143-214.7(c2)/ Session Law 2011-256.
I. REQUIRED ITEMS
A request to transfer a permit will not be approved by the Division of Water Quality (DWQ) unless all
of the applicable required items listed below are included with the submittal. Failure to provide the
listed items may result in processing delays or denial of the transfer request.
Please notify DWQ prior to the submittal of this transfer form to request an inspection of the
stormwater-system.
1. This completed and signed form.
2. Legal documentation showing that common areas related to the operation and maintenance of the
stormwater management system have been conveyed to the proposed permittee in accordance
with the condominium or planned community declaration.
3. Legal documentation showing that the declarant has conveyed at least fifty percent (50%) of the
units or lots to owners other than a declarant.
4. A copy of any recorded deed restrictions, covenants, condominium/planned community
declaration or easements, if required by the permit.
5. The designer's certification (DWQ Engineer and Designer Certification Forms are available from
each DWQ Regional office), if required by the permit and if not already submitted to DWQ.
6. If the proposed permittee is a firm, partnership, association, institution, corporation, limited liability
company, or other corporate entity, provide documentation showing the proposed permittee is a
legal entity and the named representative has the authority to act on behalf of the proposed
permittee.
7. The $40.00 processing fee. If this is an initial transfer from the original permittee the processing
fee is not required. Subsequent ownership transfers will require the $40.00 processing fee.
�ECEIi✓E
JAN 0 7 2013 D
ew-
Page 1 of 3

�pF WATF9Q
�O G
6
r
Michael F. Easley, Governor
William G. Ross, Jr„ Secretary
North Carolina Department of Environment and Natural Resources
September 11, 2002
Alan W. Klimek, P.E., Director
Division of Water Quality
Wilmington Regional Office
Mr. Christoplier'G. Yerkes-, Manager
Avenir Development, LLC
PO Box 2473
Wilmington, NC 28402
Subject: Permit No. SW8 020406
Avenir
High Density Stormwater Project
- ._- . _ New Hanover County
Dear Mr. Yerkes:
The Wilmington Regional Office received a complete Stormwater Management Permit
.Application for Avenir on September 6, 2002. 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 020406 dated September 11,
2002, for the construction of Avenir.
This permit shall be effective from the date of issuance until September 11, 2012, and shall be
subject to the conditions and limitations as specified therein. Please pay special attention to the
Operation and Maintenance requirements in this permit. Failure to establish an adequate system
for operation and maintenance of the stormwater management system will result in future
compliance problems.
If any parts, requirements, or limitations contained in this permit are unacceptable, you have the
right to request an adjudicatory hearing upon written request within thirty (30) days following
receipt of this permit. This request must be in the form of a written petition, conforming to
Chapter 150B of the North Carolina General Statutes, and filed with the Office of Administrative
Hearings, P.O. Drawer 27447, Raleigh, NC 27611-7447. Unless such demands are made this
permit shall be final and binding.
If you have any questions, or need additional information concerning this matter, please contact
Linda Lewis, or me at [phone].
Sincerely,
Rick Shiver
Water Quality Regional Supervisor
RSS/arl: S:1WQSISTORMWATIPERMIT1020406.SEP
cc: Phil Tripp, F.E.
Tony Roberts, New Hanover County Building Inspections
Beth E. Wetherill, New Hanover County Engineering
Linda Lewis
Wilmington Regional Office
Central Files
NCDENR
N.C. Division of Water Quality 127 Cardinal Drive Extension Wilmington, N.C. 28405 [phone] Fax [phone] Customer Service
800-623-7748

State Storm,,eater Management Systems
Permit No. SW8 020406
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
Avenir Development, LLC
Avenir
New Hanover County
FOR THE
construction, operation and maintenance of three underground infiltration trench systems 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 September 11, 2012, and shall be
subject to the following specified conditions and limitations:
I. DESIGN STANDARDS
1. This permit is effective only with respect to the nature and volume of stormwater
described in the application and other supporting data.
2. This stormwater system has been approved for the management of stormwater runoff as
described on page 3 of this permit, the Project Data Sheet. The stormwater control has
been designed to handle the runoff from 12,486 ftz, 9,895 ftz, and 63,567 ftzof impervious
area. The bypassed design storm must pass through a 50' vegetated filter prior to
discharge.
The tract will be limited to the amount of built -upon area indicated on page 3 of this
permit, and per approved'plans.
4. All stormwater collection and treatment systems must be located in either dedicated
common areas or recorded easements. The final plats for the project will be recorded
showing all such required easements, in accordance with the approved plans.
The runoff from all built -upon area within the permitted drainage area of this project must
be directed into the permitted stormwater control system. A permit modification must be
submitted and approved prior to the construction of additional built -upon area from
outside of the approved drainage area. }
2

State StomiNvater Management Systems
Permit No. SW8 020406
DIVISION OF WATER QUALITY
PROJECT DESIGN DATA SHEET
Project Name:
Avenir
Permit Number:
SW8 020406
-Location: "- -" -
"New Hanover County
Applicant:
Mr. Christopher G. Yerkes, Manager
Mailing Address:
Avenir Development, LLC
PO Box 2473
Wilmington, NC 28402
Application Date:
September 6, 2002
Receiving Stream/River Basin/Index #:
Cape Fear / Hewlett's_Creek / 18-87-26
Classification of Water Body:
"SA"
Trench Number:
1 2 3A 3B
Trench Depth, feet:
4' 4' 4' 4'
Trench Length x Width, feet:
65x25 108x15 263x15 160x25
Pipe Size/Length, feet:
8' /120 8"/l 10 12"/260 8' /338
Trench Bottom Elevation, FMSL:
Drainage Area, acres:
Total Impervious Surfaces, ft2:
Offsite Area entering Pond, ftz:
Required Storage Volume, ft3:
Provided Storage Volume, ft':
Temporary Storage Elevation, FMSL:
Type of Soil:
Seasonal High Water Table EIevation:
Expected Infiltration Rate:
Time to Draw Down, hours:
12'755 12' /98
12" 1190
15.5 13.5
10.25 10.25
.55 ; .70
3.24 (3A & 3B)
12,486 9,895
63,567 (3A & 3B)
none, per Engineer
1,845 1,754
9,885 (3A & 3B)
2,651 2,661
12,996 (3A & 3B)
19.5 17.5
14.25 (3A & 3B)
Sand
8.25 FMSL (All trenches)
2 inches per hour
7 6.5
15
3

State Stormwater Management Systems
Permit No. SW8 020406
II. SCHEDULE OF COMPLIANCE
The stormwater management system shall be constructed in it's entirety, vegetated and
operational for its intended use prior to the construction of any built -upon surface.
2. During construction, erosion shall be kept to a minimum and any eroded areas of the
system will be repaired immediately.
The pennittee 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 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 bypass structures, flow spreader, vegetated
filter, catch basins and piping.
g. Access to the bypass structures 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. Decorative spray fountains will not be allowed in the stormwater treatment system.
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. 'The Division does not recommend use of the infiltration system as an Erosion Control
device. If it is, the system must be restored to design condition prior to operation as a
.. stonmwater treatment device, and prior to occupancy of the facility.
9. 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 drainage area.
e. Further subdivision, acquisition, or sale of the project area. The project area is
defined as all property owned by the permittee, for which Sedimentation and
Erosion Control Plan approval or a CAMA Major permit was sought.
f. Filling in, altering, or piping of any vegetative conveyance shown on the approved
plan.
4

State Stonmvater Management Systems
Permit No. SW8 020406
10. The permittee shall submit final site layout and grading plans for any permitted future
areas shown on the approved plans, prior to construction. If the proposed BUA exceeds
the amount permitted under this permit, a modification to the permit must be submitted
and approved prior to construction.
11. 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.
12. Prior to the sale or lease of any portion of the property, the permittee shall notify DWQ
and provide the name, mailing address and phone number of the purchaser or leasee. An
access/maintenance easement to the stormwater facilities shall be granted in favor of the
permittee if access to the stormwater facilities will be restricted by the sale or lease of any
portion of the property.
13. The permittee must maintain compliance with the proposed built -upon area and ensure
that the runoff from all the built -upon is directed into the permitted system.
14. 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
1. This permit is not transferable except after notice to and approval by the Director. In the
event there is a desire for the facilities to change ownership, or there is a name change of
the Permittee, a formal permit request must be submitted to the Division of Water Quality
accompanied by an application fee, 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. Responsibility for compliance
with all permit conditions remains with the Permittee until such time as the Division
approves the formal permit 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) which have jurisdiction.
4. In the event that the facilities fail to perform satisfactorily, including the creation of
nuisance conditions, the Permittee shall take immediate corrective action, including those
as may be required by this Division, such as the construction of additional or replacement
stormwater management systems.
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 project must follow
the guidelines established in the North Carolina Erosion and Sediment Control Planning
and Design Manual.
5

State Stormwater Management Systems
Permit No. SW8 020406
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 availing address changes
within 30 days.
Permit issued this the 1 Ith day of September, 2002.
NORTH CAROLINA ENVIRONMENTAL MANAGEMENT COMMISSION
IZ . r
Alan W. Klimek, P.E., Director
Division of Water Quality _
By Authority of the Environmental Management Commission
I

State Stormwater Management Systems
Permit No. SW8 020406
Avenir
Stonnwater Permit No. SW8 020406
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,
(Proj ect)
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:
SEAL
Signature
- Registration Number - - - -- -
Date
7

State Stormwater Management Systems
Permit No. SW8 020406
Certification Requirements:
l . The drainage area to the system contains approximately the permitted acreage.
2. The drainage area to the system contains no more than the pennitted amount of
built -upon area.
3. All the built -upon area associated with the project is graded such that the runoff
drains to the system.
4. The outletibypass structure elevations are per the approved plan.
5. The outlet structure is located per the approved plans.
b. Trash rack is provided on the outlet/bypass structure.
7. All slopes are grassed with permanent vegetation.
8. Vegetated slopes are no steeper than 3:1.
9. The inlets are located per the approved plans and do not cause short-circuiting of
the system.
10. The permitted amounts of surface area and/or volume have been provided.
11. Required dfawdown devices are correctly sized per the approved plans.
12. All required design depths are provided.
13. All required parts of the system are provided, such as a vegetated shelf, and a
forebay.
14. The overall dimensions of the system, as shown on the approved plans, are
provided.
cc: NCDENR-DWQ Regional Office
Tony Roberts, New Hanover County Building Inspections
I

v
Dale Received
Fee Paid
Permit Number
.4-4-02- MUd. q-1-9-bZ
-5 zu",, 1446,
-
State of North Carolina
Department of Environment and Natural Resources
Division of Water Quality
STOR_MWATER 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):
Avenir Development, LLC
2. Print Owner/Signing Official's name and title (person legally responsible for facility and compliance):
Christopher G. Yerkes Manager
3. Mailing Address for person listed in item 2 above:
P.O. Box 2473
City: Wilmington State: NC Zip: 28402
Telephone Number: 910-763-8760
4. Project Name (subdivision, facility, or establishment name should be consistent with project name on
plans, specifications, letters, operation and maintenance agreements, etc.):
S. Location of Project (street address):
_� -- Masters Lane
City: ^ Wilmington County: New Hanover
6. Directions to project (from nearest major intersection):
From intersection of Oleander Dr. (US Hwv. 76) and Pine Grove Rd, drive southeast on Pine Grove Rd.
aapprox 0.85 miles. Take Greenville Loop Road east for 500 feet. Turn left onto Masters Lane. Site on right.
7. Latitude: N 34° 12' 00" Longitude: W 770 53' 00" of project
8. Contact person who can answer questions about the project:
Name: Phillip G. TripoTelephone Number: 910-763-5 100
II. PERMIT INFORMATION:
1. Specify whether project is (check one): X New Renewal 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 pornilt. list
The existing permit number and its issue date (if known)
3. Specify the t)Tc of project (check one):
Low Density __X_ High Density Redevelop _ General Permit Other
4. Additional Project Requirements (check applicable blanks):
LAMA 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
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.
underground infiltration trenches to treat 1.5" of runoff
2. Stormwater runoff from this project drains to the Ca Fear River basin.
3. Total Project Area: 5.66 acres
4. Project Built Upon Area: 34.85 %.
5. How many drainage basins 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 an additional sheet with the information for each area provided in the same format as below.
"Overall" Ira",-h I . 7rpllch L _7r1'17 C17 .7
......
.1 2. X.
. ......
. . . . . .
. . . .
Receiving Stream Name
Hewletts Creek
Hewletts Creek
Hewletts Creek
Hewletts Creek
Receiving Stream Class
SA
SA �,O
SA y.$5
SA
Drainage Basin Area
5.66 ac
0.547 ac qo 1_'?
0.702 ac 25
3.24 ac
Existing Impervious * Area
-
— Z = c>1 rL(, eu.
— Z ; I? ,C67
q917
Proposed Impervious * Area
1.97 ac
0.29 ac
0.23 ac
1.46ac
% Impervious* Area (total)
34.85%
52.4%
32.4%
45.0%
iz. i
On -site Buildings
48,000 sf (1
6,000 sf (t)
6,000 sf
36,000 sf
On -site Streets
18,546 sf
4,024 sf
1,002 sf
13,520 sf
On -site Parking
On -site Sidewalks & Driveways
19,382 sf
2,462 sf
2,873 sf
14,047 sf
Other on -site
Off -Site
Total:
E=85,92
E=12,486 sf
E=9,895 sf
E=63,567 sf
Impervious area is defined as th, built upon area including, but not limited to, buildings, roads, parking
defined
s 'h built upon
areas sidewalks, gravel areas, et 61
O,OA -- MV30� Pa-- lof qL143 5� 17 1 5�
99
Form SWU-101 Version 3.99 Page 2 of 4
42

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, outparcels and future development prior to the sale of any lot. If lot sizes vary significantly, a
table listing each lot number, size and the allowable built -upon area for each lot must be provided as an
attachment-
1. The following covenants are intended to ensure ongoing compliance with state stormwater management permit
number as issued by the Division of Water Quality. These covenants may
not be changed or deleted without the consent ofthe State.
De Ql t, Srk C 5G�- g��fo of l n�
2. No more than 3 0 �1 square feet of arty lot sha171 be covered by structures of impervious materials.
Impervious materials include asphalt, gravel, concrete, back stone, slate or similar material but do not include wood
decking or the water surface ofswimming 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.
5. Allpermidedrunoffftom 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
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 399 Page 3 of 4

V1. . 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.
1. Please indicate that you have provided the following required information by initialing in the space
provided next to each item.
- - Applicant's Initials
• Original and one copy of the Stormwater Management Permit Application Form L
• One copy of the applicable Supplement Form(s) for each BMP
• Permit application processing fee of $420 (payable to NCDENR) CDC
• 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 and 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)
VIL 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): Tripp Engineering. P.C.
Mailing Address: 419 Chestnut Street
City: Wilmington _ _ State: NC Zip
Phone: [phone] Fax: [phone]
VIII. APPLICANT'S CERTIFICATION
28401
I, (print or type name ofperson listed in General Information, item 2) _ Christopher G. Yerkes
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 prFsed project complies with the requirements of 15A
NCAC 2H .1000.
Signature: �� Date:
Form SWU-101 Version 3.99 Page 4 of 4

Permit No. 0'CL
(to be provided by DF3,Q)
State of North Carolina
Department of Environment and Natural Resources
Division of Water Quality
STORMWATER MANAGEMENT PERMIT APPLICATION FORM
UNDERGROUND INFILTRATION TRENCH SUPPLEMENT
This form may be photocopied for use as an original
DW Stormwater Management Plan Review:
A complete stormwater management plan submittal includes a stormwater management permit application, an
underground infiltration trench supplement 'for each system, design calculations, and plans and specifications
showing all stormwater conveyances and system details.
I. PROJECT INFORMATION
Project Name: Avenir
Contact Person: Charles Cazier Phone Number: 910 763-5100
For projects with multiple infiltration systems, a supplement form must be completed for each system. This
worksheet applies to: Trench _ 1 in Drainage Area 2
((rom plans) (from Form SWU-101)
II. DESIGN INFORMATION (attach supporting calculations/documentation)-
Soils Report Summary (based upon an actual field investigation and soil borings)
Soil Type Light Brown Fine Sand
Infiltration Rate 2.0 in/hr or cf/hr/sf (circle appropriate units)
SHWT Elevation 13.5 frnsl (Seasonal High Water Table elevation)
Trench Design Parameters
Design Volume 1,845 c.f.
Design Storm
Drawdown Time
Perforated Pipe Size
Perforated Pipe Length
No. Observation Wells
Stone Type (if used)
Stone Void Ratio
1.5 inch event (1.5 inch event for SA waters, I inch event for others)
1.0 days
8" / 12" inch diameter
120' / 55' ft.
NA
#57 crushed granite
0.40
Trench Elevations (in feet mean sea level)
Bottom Elevation 15.5 fmsl
(maybe required on a -case -by -case basis)
Storage/Overflow Elevation 19.5 fmsl
SWU-107 Rev 3.99 Page l of 4

Trench Dimensions
Height
MA ff411I
4' ft
25' ft
III. REQUIRED ITEMS CHECKLIST
Length
Volume Provided
65' ft.
2,651.20 cu.ft.
The following checklist outlines design requirements per the Stormwater Best Management Practices manual (N.C.
Department of Environment, Health and Natural Resources, November 1995) 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: Attach justification if a requirement has not been met.
Applicants Initials
a. System is located 50 feet from class SA waters and 30 feet from other surface waters.
b. System is located at least 100 feet from water supply wells.
y� c. Bottom of system is at least 2 feet above the seasonal high water table.
d. Bottom of the system is 3 feet above any bedrock or impervious soil horizon.
C e. Off-line system, runoff is excess of the design volume bypasses the system (bypass detail
provided).
f. System is designed to draw down the design storage volume to the proposed bottom
elevation under seasonal high water conditions within five days based upon infiltration
through the bottom only (a hydrogeologic evaluation may be required).
g.. Soils have a minimum hydraulic conductivity of 0.52 inches per hour.
4 C7C h. System is not sites on or in fill material or DWQ approval has been obtained.
G �L i. Plans ensure that the installed system will meet design specifications (constructed or
restored) upon initial operation once the project is complete and the entire drainage area is
stabilized.
j. System is sized to take into account the runoff at the ultimate built -out potential from all
surfaces draining to the system, including any off -site drainage..
CPC.___ _ k. System is located in a recorded drainage easement for the purposes of operation and
maintenance and has recorded access easements -to the -nearest public right-of-way.
C/ 1. System captures and infiltrates the runoff from the first 1.0 inch of rainfall (1.5 inch event
for areas draining to SA waters).
CYC� m. Drainage area for the device is less than 5 acres.
n. A pretreatment device ( filter strip, grassed swale, sediment trap, etc.) is provided.
o. Trench bottom is covered with a layer of clean sand to an average depth of 4 inches.
p. Sides of infiltration trench are lined with geotextile fabric.
qX q. Rock used is free of fines (washed stone) and has large void ratio.
(f—,V--- r. Side to bottom ratio is less than 4:1.
SWU-107 Rev 3.99 Page 2 of 4

.s. Observation well(s) are provided (case -by -case basis).
DC. t . Vegetated filter is provided for overflow (50 feet for SA waters, 30 feet for other waters) and
detail is shown on plans.
C -01-1 u . A benchmark for checking sediment accumulation is provided.
IV. UNDERGROUND INF[LTRATION TRENCH OPERATION AND MAINTENANCE AGREEMENT
After every runoff producing rainfall event and at least monthly inspect the bypass/overflow structure for
blockage and deterioration and the infiltration system for erosion, trash accumulation, grass cover, and general
condition.
2. Repair eroded areas- immediately, re -seed as necessary to maintain adequate vegetative cover, mow vegetative
cover to maintain a maximum height of six inches, and remove.trash and blockages as.needed to maintain
system performance.
3. Remove accumulated sediment annually or when depth is reduced to 75% of the original design depth. Restore
depth to original design depth without over -excavating. Over -excavating may cause the required water table
separation to be reduced and may compromise the ability of the system to perform as designed.
4. The water level in any monitoring wells will be recorded after a 1 inch rainfall event and at least once a month.
Chronic high water table elevations (within 1 foot of the bottom of the system for a period of three months)
shall be reported to -DWQ immediately.
5. If DWQ determines that the system is failing, the system will immediately be repaired or replaced to original
design specifications. If the system cannot be repaired to perform its design function, other stormwater control
devices as allowed by NCAC 2H .1000 must be designed, approved and constructed.
6. Remove accumulated sediment from the infiltration system annually or when depth in the unit is reduced
to 75% of the original design depth. The system shall be restored to the original design depth without
over -excavating. Over -excavating may cause the required water table separation to be reduced and may
compromise the ability of the system to perform as designed. Removed sediment shall be disposed of in
an appropriate manner and shall not be handled in a manner that will adversely impact water quality (i.e,
stockpiling near a stormwater treatment device or stream, etc.).
A benchmark shall be established in the infiltration system, The berchmark will document -the original
design depth so that accurate sediment accumulation readings can be taken. The measuring device used
to determine the depth at the benchmark shall be such that it will give an accurate depth reading and not
readily penetrate into accumulated sediments.
When the depth at the benchmark reads 0.75' ; the accumulated sediment shall be removed from
the system.
SNVU-107 Rev 3.99 Page 3 of 4

I acknowledge and agree by my signature below that I am responsible for maintaining the stormwater
collection system in accordance wiih the six 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 and Title: ChristoQher G. Yerkes. Proiect Manager
Address: Plantation Inc. P.O. Box 2413 i•lmin ton NC 28402
Phone:-_ _ "-_ 910-763-8760�'--�- - Date:
Signature:
Note: The legally responsibllparty should not be a honteowners association unless more than .i 0% of the lots have been sold and
a resident of the subdivision has bee named the president.
1, Della C. Baird , a Notary Public for the Stale of North Carolina` , County of
Pender do hereby certify that ^ Christopher G. Yerkes personally appeared before me this
ZS day of March , 2002 and acknowledge the due execution of the forgoing infiltration
basin maintenance requirements. Witness my hand and official seat,
`01 111III Itlll,,
C.
NOTARY; ;
0 NO
SEAL My commission expires October 15 2006
SWU-107 Rev 3.99 Page 4 of

Permit No.:�G; i, ozcyo. �,
(to be provided 6v Dfi`J
. State of North Carolina
Department of Environment and Natural Resources
Division of Water Quality
STORMWATER MANAGEMENT PERMIT APPLICATION FORM
UNDERGROUND INFILTRATION TRENCH SUPPLEMENT
This form may he photocopied for use as an original
DWO Stormwater Management Plan Review:
A complete stormwater management plan submittal includes a stormwater management permit application, an
underground infiltration trench supplement ' for each system, design calculations, and plans and specifications
showing all stormwater conveyances and system details.
1. PRO.IECT INFORMATION
Project Name:. Avenir -
Contact Person: Charles Cazier Phone Number: ( 910 ) 7b3-5100
For projects with multiple infiltration systems, a supplement form must be completed for each system. This
worhsheet applies to: Trench 2 in Drainage Area _ 3
(from plans) (from For SWU-101)
11. DESIGN INFORMATION (attach supporting calculations/documentation):
Soils Report Summary (based upon an actual field investigation and soil borings)
Soil Type Light Brown Fine Sand
Infiltration Rate 2.0 in/hr or cf/hr/sf (circle appropriate units)
SHWT Elevation 11.5 fmsl (Seasonal High Water Table elevation)
Trench Design Parameters
Design Volume
Design Storm
Drawdown Time
Perforated Pipe Size
Perforated Pipe Length
No. Observation Wells
Stone Type (if used)
Stone Void Ratio
1754 c.f.
1.5 inch event (1.5 inch event for SA waters, I inch event for others)
1.0 days
8" / 12" inch diameter
l 10' / 98' ft.
NA
_#57 crushed granite
0.40
Trench Elevations (in feet mean sea level)
Bottom Elevation 13.5 finsl
Storage/Overflow Elevation 17.5 fmsl
(may be required on a case -by -case basis)
SWU-107 Rev 3.99 Page 1 of 4

Trench Dimensions
Height
Width
al
15' ft
M. REQUIRED ITEMS CHECKLIST
Length
Volume Provided
108, ft.
2,661.43 cu.ft.
The following checklist outlines design requirements per the Stormwater Best Management Practices manual (N.C.
Department of Environment, Health and Natural Resources, November 1995) 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. Attach justification if a requirement has not been met.
Applicants Initials
t1f�C a. System is located 50 feet from class SA waters and 30 feet from other surface waters.
C j) C b. System is located at least 100 feet from water supply wells.
c. Bottom of system is at least 2 feet above the seasonal high water table.
d. Bottom of the system is 3 feet above any bedrock or impervious soil horizon.
r e. Off-line system, runoff is excess of the design volume bypasses the system (bypass detail
provided).
f f System is designed to draw down the design storage volume to the proposed bottom
elevation under seasonal high water conditions within five days based upon infiltration
through the bottom only (a hydroggologic evaluation may be required).
g. Soils have a minimum hydraulic conductivity of 0.52 inches per hour.
GJ h. System is not sites on or in fill material or DWQ approval has been obtained.
C� i. Plans ensure that the installed system will meet design specifications (constructed or
restored) upon initial operation once the project is complete and the -entire drainage area is
stabilized.
J. System is sized to take into account the runoff at the ultimate built -out potential from all
surfaces draining to the system, including any.off=site drainage.
k. System is located in a recorded drainage easement for the purposes of operation and
- -,maintenance and has -recorded -access easements to the nearest"public right-of-way.
I. System captures and infiltrates the runoff from the first L0 inch of rainfall (1.5 inch event
for areas draining to SA waters).
G m. Drainage area for the device is less than 5 acres.
n. A pretreatment device ( filter strip, grassed swale, sediment trap, etc.) is provided.
o. Trench bottom is covered with a layer of clean sand to an average depth of 4 inches.
p. Sides of infiltration trench are lined with geotextile fabric.
q. Rock used is free of fines (washed stone) and has large void ratio.
c - _ r. Side to bottom ratio is less than 4:1.
SWU-107 Rev 3.99 Page 2 of 4

_`,C1K s. Observation Nvell(s) are provided (case -by -case basis).
t . Vegetated filter is provided for overflow (50 feet for SA waters, 30 feet for other waters) and
detail is shown on plans.
C jam, — u . A benchmark for checking sediment accumulation is provided.
IV. • UNDERGROUND.IiNFILTRATION TRENCH.OPERATION AND MAINTENANCE AGREEMENT
1. After every runoff producing rainfall event and at least monthly inspect the bypass/overflow structure for
blockage and deterioration and the infiltration system for erosion, trash accumulation, grass cover, and general
condition.
2. Repair eroded areas immediately, re -seed as necessary to maintain adequate vegetative cover, mow vegetative
cover to maintain a maximum height of six inches, and remove trash and blockages as needed to maintain
system performance.
Remove accumulated sediment annually or when depth is reduced to 75% of the original design depth. Restore
depth to original design depth without over -excavating. Over -excavating may cause the required water table
separation to be reduced and may compromise the ability of the system to perform as designed.
4. The water level in any monitoring wells will be recorded after a 1 inch rainfall event and at least once a month.
Chronic high water table elevations (within 1 foot of the bottom of the system for a period of three months)
shall be reported to DWQ immediately.
5. if DWQ determines that the system is failing, the system will immediately be repaired or replaced to original
design specifications. If the system cannot be repaired to perform its design function, other stormwater control
devices as allowed by NCAC 2H .1000 must be designed, approved and constructed.
6. Remove accumulated sediment from the infiltration system annually or when depth in the unit is reduced
to 75% of the original design depth. The system shall be restored to the original design depth without
over -excavating. Over -excavating may cause the required water table separation to be reduced and may
compromise the ability of the system to perform as designed. Removed sediment shall be disposed of in
an appropriate manner and shall not be handled in a manner that will adversely impact water quality (i.e.
stockpiling near a stormwater treatment device or stream, etc.).
A benchmark shall be - established -in the infiltration system --The benchmark will document the original
design depth so that accurate sediment accumulation readings can be taken. The measuring device used
to determine the depth at the benchmark shall be such that it will give an accurate depth reading and not
readily penetrate into accumulated sediments.
When the depth at the benchmark reads 0.75' , the accumulated sediment shall be removed from
the system,
SWU-107 Rev 3.99 Page 3 of 4

I acknowledge and agree by my signature below that I am responsible for maintaining the stormwater
collection system in accordance with the six maintenance procedures listed above, [ agree to notify DWQ
of any problems with the system or Prior to any changes to the system or responsible party.
Print Name and Title: Christopher G. Yerkes Pro'ect Manager
Address: Plantation Inc. P,O. Box 24 3 Wilmin ton NC 28402
Phone: [phone]'.;� Dater
Signature:
Note: The legally responsible parA should not be a homeowners association unless more than SO% of the lots have been sold and
a resident of the subdivision has bee named the president.
I Della C. Baird a Notary Public for the State of North Carolina County of
Pender , do hereby certify that _Christopher G. Yerkes personally appeared before ine this
2- day of March , 2002 , and acknowledge the due execution of the forgoing infiltration
basin maintenance requirements. Witness my hand and official seal,
\\\``111t11�i i�rrrfnr�i
O NOTARk-.6
Zz
:may BL1G `v
COIJN���`���`
1!!1l111111
SEAL My commission expires October 15 2006
SVVU-107 Re%, 3.99 Page 4 of 4

Permit No.
(to be provided h4, DIFQ)
State of North Carolina
Department of Environment and Natural Resources
Division of Water Quality
STORMWATER MANAGEMENT PERMIT APPLICATION FORM
UNDERGROUND INFILTRATION TRENCH SUPPLEMENT
This form may be photocopied for use as an original
D_WO Stor_mwater Management Plan Review:
A complete stormwater management plan submittal includes a stormwater management permit application, an
underground infiltration trench supplement - for each system, design calculations, and plans and specifications
showing all stormwater conveyances and system details.
I. PROJECT INFORMATION
Project Name: Avenir
Contact Person: Charles Cazier Phone Number: 910 763-5100
For projects with multiple infiltration systems, a supplement form must be completed for each system. This
worksheet applies to- Trench 3 in Drainage Area 4
(from plans) (from Form SWU-101)
11. DESIGN INFORMATION (attach supporting calculations/documentation):
Soils Report Summary (based upon an actual field investigation and soil borings)
Soil Type Light Brown Fine Sand
Infiltration Rate 2.0 in/hr or cf/hr/sf (circle appropriate units)
SHWT Elevation 8.25 fmsl (Seasonal High Water Table elevation)
Trench Design Parameters
Design Volume
Design Storm
Drawdown Time
Perforated Pipe Size
Perforated Pipe Length
No. Observation Wells
Stone Type (if used)
Stone Void Ratio
9885 c.f.
1.5 inch event (1. 5 inch event for SA waters, I inch event fur others)
1.0 days --
8" / 12" inch diameter
338' /450' ft.
NA (may be required on a case -by -case basis)
#57 crushed •g_ranit0.40
Trench Elevations (in feet mean sea level)
Bottom Elevation 10.25 fmsl
Storage/Overflow Elevation 14.25 fmsl
SWU-107 Rev 3.99 Page 1 of 4

Trench Dimensions
1-lei^0ht
Width
ft. Length 263', 160' _ft
15', 25' ft. Volume Provided 12,994.6 cu.ft.
Ill. 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, November 1995) 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 Sturmwater Management Permit
Application Form, the agent may initial below. Attach justification if a requirement has not been met.
Applicants Initials
Kf ;�__ a. System is located 50 feet from class SA waters and 30 feet from other surface waters.
b. System is located at least 100 feet from water supply wells.
c. Bottom of system is at least 2 feet above the seasonal high water table.
[, d. Bottom of the system is 3 feet above any bedrock or impervious soil horizon.
e. Off-line system, runoff is excess of the design volume bypasses the system (bypass detail
provided).
GL� f. System is designed to draw down the design storage volume to the proposed bottom
elevation under seasonal high water conditions within five days based upon infiltration
through the bottom only (a hydrogeologic evaluation may be required).
G C g. Soils have a minimum hydraulic conductivity of 0.52 inches per hour.
G [ h. System is not sites on or in fill material or DWQ approval has been obtained.
[�G i. Plans ensure that the installed system will meet design specifications (constructed or
restored) upon initial operation once the project is complete and the entire drainage area is
stabilized.
J. System is sized to take into account the runoff at the ultimate built -out potential from all
surfaces draining to the system, including any off site drainage.
k. System is located in a recorded drainage easement for the purposes of operation and
- maintenance and has recorded access easements-to`the nearest public right-of-way.
r(. 1. System captures and infiltrates the runoff from.the first 1.0 inch of rainfall (1.5 inch event
for areas draining to SA waters).
C�_ - m. Drainage area for the device is less than 5 acres.
n. A pretreatment device ( filter strip, grassed swale, sediment trap, etc.) is provided.
CJ o. Trench bottom is covered with a layer of clean sand to an average depth of 4 inches.
CD L p. Sides of infiltration trench are lined with geotextile fabric.
G' q. Rock used is free of fines (washed stone) and has large void ratio.
Ca r. Side to bottom ratio is less than 4:1.
SWU-107 Rev 3 99 Page 2 of 4

�1�C.. S. Observation well(s) are provided (case -by -case basis).
CSC t . Vegetated filter is provided for overflow (50 feet for SA waters, 30 feet for other waters) and
detail is shown on plans.
�C u . A benchmark for checking sediment accumulation is provided.
IV. UNDERGROUND INFILTRATION TRENCH OPERATION AND MAINTENANCE AGREEMENT
1. After every runoff producing rainfall event and at least monthly inspect the bypass/overflow structure for
blockage and deterioration and the infiltration system for erosion, trash accumulation, grass cover, and general
condition.
Repair eroded areas immediately, re -seed as necessary to maintain adequate vegetative cover, mow vegetative
cover to maintain a maximum height of six inches, and remove trash and blockages as needed to maintain
system performance.
Remove accumulated sediment annually or when depth is reduced to 75% of the original design depth. Restore
depth to original design depth without over -excavating. Over -excavating may cause the required water table
separation to be reduced and may compromise the ability of the system to perform as designed.
4. The water level in any monitoring wells will be recorded after a I inch rainfall event and at least once a month.
Chronic high water table elevations (within I foot of the bottom of the system for a period of three months)
shall be reported to DWQ immediately.
5. If DWQ determines that the system is failing, the system will immediately be repaired or replaced to original
design specifications. If the system cannot be repaired to perform its design function, other stormwater control
devices as allowed by NCAC 2H .1000 must be designed, approved and constructed.
6. Remove accumulated sediment from the infiltration system annually or when depth in the unit is reduced
to 756/o of the original, design depth. The system shall be restored to the original design depth without
over -excavating. Over -excavating may cause the required water table separation to be reduced and may
compromise the ability of the system to perform as designed. Removed sediment shall be disposed of in
an appropriate manner and shall not be handled in a manner that will adversely impact water quality (i.e.
stockpiling near a stormwater treatment device or stream, etc.).
---A benchmark -shall .be established in the infiltration system.- The benchmark will document the original
design depth so that accurate sediment accumulation readings can be taken. The measuring device used
to determine the depth at the benchmark shall be such that it will give an accurate depth reading and not
readily penetrate into accumulated sediments.
When the depth at the benchmark reads 0.75' , the accumulated sediment shall be removed from
the system.
S WU-107 Rev 3.99 Page 3 of 4

I acknowledge and agree by my signature below that 1 am responsible for maintaining the stormwater
collection system in accordance with the six 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 and Title: Christopher G. Yerkes, Project Manager
Address: Plantation Inc. P.O. Box 2473 Wilmington NC 28402 /
Phone: [phone] j Da G� -
Signature: r
Note: The legally responsible parry should not be a homeowners association unless more than 50% of the lots have been sold and
a resident of the subdivision has bee named the president.
1, _ Della C. Baird , a Notary Public for the State of North Carolina , County of
Pender , do hereby certify that Christopher G. Ycrkes_ personally appeared before me this
-OS day of March , 2002 , and acknowledge the due execution of the forgoing infiltration
basin maintenance requirements. Witness city hand and official seal,
SEAL
My commission expires October 15, 2006
SWU-107 Rev 3.99
Page 4 of 4

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�-.� r..rr.:c.:.i...v..+vr:.:vr:.:i.:.:ivv:t.T::.T.:.�, •.�,•.�}}}u}}}'.�}i:.:.......}z:.}}.:.ir.,::'.iir:}:.:::::..:.r...r..rr�.,..+:�:r.�W.��'.W.IV. '�.. .... ...... .,....,..,.......n..r.n yr .rr..r.rr.r..r..r..r..:..:.:..:......v..v..v ..vv..v.. .........v..
Date Received
Fee Paid
Permit Number
-4-02 Mo. q-l$-v2
I s4zowl 14-46
1
State of North Carolina
Department of Environment and Natural Resources
Division of Water Quality
r
STORMWATER MANAGEMENT PERMIT APPLICATION FORM
This form may be photocopied jar use as an original
1. GENERAL INFORMATION
1. Applicants name (specify the name of the corporation, individual, etc. who owns the project):
Avenir_Development, LLC
2. Print Owner/Signing Official's name and title (person legally responsible for facility and compliance):
Christopher G. Yerkes, -Manager
3. Mailing Address for person listed in item 2 above:
P.O. Box 2473
City: Wilmington State: NC Zip: 28402
Telephone Number: 910-763-8760
4. Project Name (subdivision, facility, or establishment name —should be consistent with project name on
plans, specifications, letters, operation and maintenance agreements, etc.):
Avenir
5. Location of Project (street address):
Masters Lane
City: Wilming on County: New Hanover
6. Directions to project (from nearest major intersection):
From intersection of Oleander Dr. US Hiv 76 and Pine Grove Rd drive southeast on Pine Grove Rd.
approx 0.85 miles. Take Greenville Loop Road east for 500 feet. Turn left onto Masters Lane. Site on right.
7. Latitude : N 340 12' 00"_ Longitude: W 770 53' 00" of project
8. Contact person who can answer questions about the project:
Name: Phillip G. Tripp Telephone Number: 910-763-5100
II. PERMIT INFORMATION:
1. Specify whether project is (check one): XNew Renewal Modification
Form SWU-101 Version 399 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 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 Storrnwater
Information on required state pen -nits can be obtained by contacting the Customer Service Center at
1-877-623-6748.
Ill. PROJECT INFORMATION
1. In the space provided below, summarize how ston-nwater will be treated. Also attach a detailed narrative
(one to two pages) describing stormwater management for the project.
underground infiltration trenches to treat 1.5" of runoff
2. Stormwater runoff from this project drains to the — Cape Fear River basin.
3. Total Project Area: 5.66 acres
5, How many drainage basins does the project have? I
4. Project Built Upon Area: 34.85 %,
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.
- "Overall" Tra7ch f T_-e4r_b Z- 7_reach J
.. .. .. .....
41
..... .........
x�,v �Ixox �xm:mx
Receiving Stream Name
Hewletts Creek
Hewletts Creek
Hewletts Creek
Hewletts Creek
Receiving Strewn Class
SA
SA
SA
SA
Drainage Basin Area
5.66 ac
0,547 ac
0.702 ac;
3.24 ac
Existing Impervious Area
-
-
-
-
Proposed Impervious Area
1.97 ac
0.29 ac
0.23 ac
1.46ac
% Impervious* Area (total)
34.85%
52.4%
32.4%
45.0%
....... ............... ...
...
a
A .
B.R
. ...
On -site Buildings
48,000 sf
6,000 sf ti
6,000 sf
36,000 sf
On -site Streets
18,546 sf
4,024 sf
1,002 sf
13,520 sf
On -site Parking
On -site Sidewalks & Driveways
19,382 sf
2,462 sf
2,873 sf
14,047 sf
Other on -site
Off - site
Total:
E=95,928 sf
Y-=12,486 sf
Y-=9,895 sf
Z=63,567 sf
* Impervious area is defined as the built upon area including, ncluding, but not limited to, buildings, roads, parking
areas sidewalks, gravel areas, etc.
Form SWU-101 Version 3.99 Page 2 of 4

I
T��

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, 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 fallowing covenants are intended to erasure ongoing compliance with state stormwater management permit
number as issued by the Division of Water Quality. These covenants may
not he changed or deleted without the consent of the State.
2. No more than 3,000 square feet ofany lot shall be covered by structures of impen4ous materials.
Impervious materials include asphalt, gravel, concrete, brick stone, slate or similar material but do not include wood
decking or the water surface of swimming pools.
3. Swales shall not be filled in, piped or altered except as necessary to provide driveway crossings.
4. Built -upon area in excess ofthe permitted amount requires a state stormwater management permit modication prior
to construction.
5. All permitted runo (from 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 pert rmanee 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
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

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.
Applicant's Initials
• Original and one copy of the Stormwater Management Permit Application .Form
• One copy of the applicable Supplement Form(s) for each BMP �+ZX
• Permit application processing fee of $420 (payable to NCDENR) (a�
• Detailed narrative description of stormwater treatment/management c
• Two copies of plans and specifications, including:
- Development[Project name
- Engineer and firm
- Legend
- North arrow
- Scale
- Revision number and 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 stonnwater 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)
VI1. AGENT AUTHORIZATION
If you wish to designate authority to another individual or firm so that they may provide information on your
behalf, please complete this section.
Designated agent (individual or finn): Tripp Engineering, P.C.
Mailing Address: 419 Chestnut Street
City: Wilmin on State: NC Zip: 28401
Phone: [phone] Fax: [phone]
Vlll. APPLICANT'S CERTIFICATION
1, (print or type name of person listed in General Information, item 2) Christopher G. Yerkes
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 p3opo<d project complies with the requirements of 15A
NCAC 2H .1000. l7 n 1
Signature:Date:
7. l
Form SWU-101 Version 3.99 Page 4 of 4

Permit No. '520F ozot/c '
(to be provided by DWQ)
State of North Carolina
Department of Environment and Natural Resources
Division of Water Quality
STORMWATER MANAGEMENT PERMIT APPLICATION FORM
UNDERGROUND INFILTRATION TRENCH SUPPLEMENT
This form may be photocopied for use as an original
DWQ Stormwater Management Plan Review:
A complete stormwater management plan submittal includes a stormwater management permit application, an
underground infiltration trench supplement for each system, design calculations, and plans and specifications
showing all stormwater conveyances and system details.
I. PROJECT INFORMATION
Project Name: Avenir
Contact Person: Charles Cazier Phone Number: [phone]
For projects with multiple infiltration systems, a supplement form must be completed for each system. This
worksheet applies to: Trench 1 in Drainage Area 2
(front plans) (from Form SWU-1 01)
11. DESIGN INFORMATION (attach supporting calculations/documentation):
Soils Report Summary (based upon an actual field investigation and soil borings)
Soil Type Light Brown Fine Sand
Infiltration Rate 2.0 in/hr or cf/hr/sf (circle appropriate units)
SHWT Elevation 13.5 fmsl (Seasonal High Water Table elevation)
Trench Design Parameters
Design Volume ____I 845 c.f.
Design Storm 1, 5 inch event (1.5 inch event for SA waters, 1 inch event for other.)
Drawdown Time 1.0 days
Perforated Pipe Size 8�/ 1212" inch diameter
Perforated Pipe Length —120' / 55' ft.
No. Observation Wells NA (Wray be required on a case -by -case basis)
Stone Type (if used) J#57 crushed rg anite
Stone Void Ratio 0.40
Trench Elevations (in feet mean sea level)
Bottom Elevation 15.5 fmsl
Storage/Overflow Elevation 19.5 fmsl
SWU-107 Rev 3.99 Page 1 of 4

Trench Dimensions
Height 4' ft. Length 65' ft.
Width 25' ft. Volume Provided 2,651.20 cu.ft.
Q.I. 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, November 1995) 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. Attach justification if a requirement has not been met.
Applicants Initials
C-� a. System is located 50 feet from class SA waters and 30 feet from other surface waters.
��- b. System is located at least 100 feet from water supply wells.
�S c. Bottom of system is at least 2 feet above the seasonal high water table.
( d. Bottom of the system is 3 feet above any bedrock or impervious soil horizon.
_ e. Off-line system, runoff is excess of the design volume bypasses the system (bypass detail
provided).
f. System is designed to draw down the design storage volume to the proposed bottom
elevation under seasonal high water conditions within five days based upon infiltration
through the bottom only (a hydrogeologic evaluation may be required).
g. Soils have a minimum hydraulic conductivity of 0.52 inches per hour.
CDC h. System is not sites on or in fill.material or DWQ approval has been obtained.
e_J2C i, Plans ensure that the installed system will meet design specifications (constructed or
restored) upon initial operation once the project is complete and the entire drainage area is
stabilized.
a<� j. System is sized to take into account the runoff at the ultimate built -out potential from all
surfaces draining to the system, including any off -site drainage.
f7L k. System is located in a recorded drainage easement for the purposes of operation and
maintenance and has recorded access easements to the nearest public right-of-way.
C 1. System captures and infiltrates the runoff from the first 1.0 inch of rainfall (1.5 inch event
for areas draining to SA waters).
m. Drainage area for the device is less than 5 acres.
(7L n. A pretreatment device ( filter strip, grassed swale, sediment trap, etc.) is provided.
G—�— o. Trench bottom is covered with a layer of clean sand to an average depth of 4 inches.
G DL __ p. Sides of infiltration trench are lined with geotextile fabric.
L q. Rock used is free of fines (washed stone) and has large void ratio.
r. Side to bottom ratio is less than 4:1.
SWU-107 Rev 3.99 Page 2 of 4

s. Observation well(s) are provided (case -by -case basis).
Gi7C- t . Vegetated filter is provided for overflow (50 feet for SA waters, 30 feet for other waters) and
detail is shown on plans.
u . A benchmark for checking sediment accumulation is provided.
IV. UNDERGROUND INFILTRATION TRENCH OPERATION AND MAINTENANCE AGREEMENT
1. After every runoff producing rainfall event and at least monthly inspect the bypass/overflow structure for
blockage and deterioration and the infiltration system for erosion, trash accumulation, grass cover, and general
condition.
Repair eroded areas immediately, re -seed as necessary to maintain adequate vegetative cover, mow vegetative
cover to maintain a maximum height of six inches, and remove trash and blockages as needed to maintain
system performance.
Remove accumulated sediment annually or when depth is reduced to 75% of the original design depth. Restore
depth to original design depth without over -excavating. Over -excavating may cause the required water table
separation to be reduced and may compromise the ability of the system to perform as designed.
4. The water level in any monitoring wells will be recorded after a 1 inch rainfall event and at least once a month.
Chronic high water table elevations (within 1 foot of the bottom of the system for a period of three months)
shall be reported to DWQ immediately.
If DWQ determines that the system is failing, the system will immediately be repaired or replaced to original
design specifications. If the system cannot be repaired to perform its design function, other stormwater control
devices as allowed by NCAC 2H .1000 must be designed, approved and constructed.
Remove accumulated sediment from the infiltration system annually or when depth in the unit is reduced
to 75% of the original design depth. The system shall be restored to the original design depth without
over -excavating. Over -excavating may cause the required water table separation to be reduced and may
compromise the ability of the system to perform as designed. Removed sediment shall be disposed of in
an appropriate manner and shall not be handled in a manner that will adversely impact water quality (i.e.
stockpiling near a stormwater treatment device or stream, etc.).
A benchmark shall be established in the infiltration system. The benchmark will document the original
design depth so that accurate sediment accumulation readings can be taken. The measuring device used
to determine the depth at the benchmark shall be such that it will give an accurate depth reading and not
readily penetrate into accumulated sediments.
When the depth at the benchmark reads 0.75' , the accumulated sediment shall he removed from
the system.
SWU-107 Rev 3,99 Page 3 of 4

acknowledge and agree by my signature below that 1 am responsible for maintaining the stormwater
collection system in accordance with the six 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 and Title: Christopher G. Yerkes, Project Manama
Address:
Phone: 910-76:
Signature:
Date:
Note: The legally resj)onsibllparty should not be a homeolvneny association unless more than 50% of the lots hove been sold and
a resident of the subdivision ha,s bee named the president.
1, Della C. Baird , a Notary Public for the State of North Carolina , Cauuty of
Pender , do hereby certify that Christopher G. Yerkes personally appeared before ine this
0& day of March , 2002 , and acknowledge the due execution of the forgoing infiltration
basin maintenance requirements. Witness my hand and official seal,
\`��154141111rrr11!!��
NCTARY' 1
rlrrr r n u n 444���
SEAL
My commission expires October 15 2000
S WU-107 ReN, 3.99 Page 4 of 4

Permit No. d- k)K ozow)(2
(to be provided by DWQ)
State of North Carolina
Department of Environment and Natural Resources
Division of Water Quality
STORMWATER MANAGEMENT PERMIT APPLICATION FORM
UNDERGROUND INFILTRATION TRENCH SUPPLEMENT
This form may be photocopied for use as an original
DWO Stormwater Management Plan Review;
A complete stormwater management plan submittal includes a stormwater management permit application, an
underground infiltration trench supplement for each system, design calculations, and plans and specifications
showing all stormwater conveyances and system details.
I. PROJECT INFORMATION
Project Name: A,
Contact Person: Charles Cazier Phone Number: 910 7635100
For projects with multiple infiltration systems, a supplement form must be completed for each system. This
worksheet applies to: Trench _ 2 in Drainage Area 3 _
(front plans) (from Form SWU-101)
11. DESIGN INFORMATION (attach supporting calculations/documentation)-
Soils Report Summary (based upon an actualfield investigation and soil borings)
Soil Type Light Brown Fine Sand
Infiltration Rate 2.0 inlhr or cf/hr/sf (circle appropriate units)
SHWT Elevation 11.5 fmsl (Seasonal High Water Kahle elevation)
Trench Design Parameters
Design Volume 1754 c.f.
Design Storm
Drawdown Time
Perforated Pipe Size
Perforated Pipe Length
No, Observation Wells
Stone Type (if used)
Stone Void Ratio
1.5 inch event (1.5 inch event for SA waters, I inch event for other.)
1.0 days
8" / 12" inch diameter
110' / 98, ft.
NA
_#57 crushed rg anite
0.40
Trench Elevations (in feet mean sea level)
Bottom Elevation 13.5 fmsl
(may he required on a case -by -case hasis)
Storage/Overflow Elevation 17.5 fmsl
SVVU-107 Rev 3.99 Page 1 of 4

Trench Dimensions
Height
Width
0
15' ft
111. REQUIRED ITEMS CHECKLIST
Length
Volume Provided
108, ft.
2,661.43 cu.ft.
The following checklist outlines design requirements per the Stormwater Best Management Practices manual (N.C.
Department of Environment, Health and Natural Resources, November 1995) 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. Attach justification if a requirement has not been met.
Applicants Initials
a. System is located 50 feet from class SA waters and 30 feet from other surface waters.
b. System is located at least 100 feet from water supply wells.
C c. Bottom of system is at least 2 feet above the seasonal high water table.
d. Bottom of the system is 3 feet above any bedrock or impervious soil horizon.
C. Off-line system, runoff is excess of the design volume bypasses the system (bypass detail
provided).
l f. System is designed to draw down the design storage volume to the proposed bottom
elevation under seasonal high water conditions within five days based upon infiltration
through the bottom only (a hydrogeologic evaluation may be required).
g�� g. Soils have a minimum hydraulic conductivity of 0.52 inches per hour.
6914 _ h. System is not sites on or in fill material or DWQ approval has been obtained.
1__bA_ _ i. Plans ensure that the installed system will meet design specifications (constructed or
restored) upon initial operation once the project is complete and the entire drainage area is
stabilized.
_,X, j. System is sized to take into account the runoff at the ultimate built -out potential from all
surfaces draining to the system, including any off site drainage.
_ k. System is located in a recorded drainage easement for the purposes of operation and
maintenance and has recorded access easements to the nearest public right-of-way.
CDC 1. System captures and infiltrates the runoff from the first 1.0 inch of rainfall (1.5 inch event
for areas draining to SA waters).
G m. Drainage area for the device is less than 5 acres.
G n. A pretreatment device ( filter strip, grassed swale, sediment trap, etc.) is provided.
o. Trench bottom is covered with a layer of clean sand to an average depth of 4 inches.
p. Sides of infiltration trench are lined with geotextile fabric.
l�G q. Rock used is free of fines (washed stone) and has large void ratio.
fZ_ r. Side to bottom ratio is less than 4:1.
SWU-107 Rev 3,99 Page 2 of 4

C.7C s. Observation well(s) are provided (case -by -case basis).
t . Vegetated filter is provided for overflow (50 feet for SA waters, 30 feet for other waters) and
detail is shown on plans.
CTy- u , A benchmark for checking sediment accumulation is provided.
IV. UNDERGROUND INFILTRATION TR.ENCI=1 OPERATION AND MAINTENANCE AGREEN11ENT
1. After every runoff producing rainfall event and at least monthly inspect the bypass/overflow structure for
blockage and deterioration and the infiltration system for erosion, trash accumulation, grass cover, and general
condition.
Repair eroded areas immediately, re -seed as necessary to maintain adequate vegetative cover, mow vegetative
cover to maintain a maximum height of six inches, and remove trash and blockages as needed to maintain
system performance.
Remove accumulated sediment annually or when depth is reduced to 75% of the original design depth. Restore
depth to original design depth without over -excavating. Over -excavating may cause the required water table
separation to be reduced and may compromise the ability of the system to perform as designed.
4. The water level in any monitoring wells will be recorded after a 1 inch rainfall event and at least once a month.
Chronic high water table elevations (within 1 foot of the bottom of the system for a period of three months)
shall be reported to DWQ immediately.
5. If DWQ determines that the system is failing, the system will immediately be repaired or replaced to original
design specifications. if the system cannot be repaired to perform its design function, other stormwater control
devices as allowed by NCAC 2H .1000 must be designed, approved and constructed.
6. Remove accumulated sediment from the infiltration system annually or when depth in the unit is reduced
to 75% of the original design depth. The system shall be restored to the original design depth without
over -excavating. Over -excavating may cause the required water table separation to be reduced and may
compromise the ability of the system to perform as designed. Removed sediment shall be disposed of in
an appropriate manner and shall not be handled in a manner that will adversely impact water quality (i,e,
stockpiling near a stormwater treatment device or stream, etc.).
A benchmark shall be established in the infiltration system. The benchmark will document the original
design depth so that accurate sediment accumulation readings can be taken. The measuring device used
to determine the depth at the benchmark shall be such that it will give an accurate depth reading and not
readily penetrate into accumulated sediments.
When the depth at the benchmark reads 0.75' the accumulated sediment shall be removed from
the system.
SWU-107 Rev 3.99 Page 3 of

I acknowledge and agree by my signature below that 1 am responsible for maintaining the stormwater
collection system in accordance with the six 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 and Title: Christopher G. Yerkes, Project Manager
Address:
Phone: [phone]E
Signature:
Date:
Sm
Note: The legally
y responsible par �.should not be a horneowm ners association unless ore than 50% of the lots have hewn ,cold and
a resident of the subdivision has bee named the president.
1, Della C. Baird a Notary Public for the State of North Carolina , County of
Pender , do hereby certify that Christopher G. Yerkes personally appeared before me this
zf3- day of Marclh 2002 , and acknowledge the due execution of the forgoing infiltration
basin maintenance requirenhents. Witness my hand and official seal,
NOTARY;. o'
rrrrrr�i �titi�h+���
SEAL My commission expires October 15, 2006
SWU-107 ReN, 3.99 Page 4 of 4

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Permit No.
(to he provided by D1P'Q)
State of North Carolina
Department of Environment and Natural Resources
Division of Water Quality
STORMWATER MANAGEMENT PERMIT APPLICATION FORM
UNDERGROUND INFILTRATION TRENCH SUPPLEMENT
'Phis form may he photocopied for use as an original
DWQ Stormwater Management Plan Review:
A complete stormwater management plan submittal includes a stormwater management permit application, an
underground infiltration trench supplement for each system, design calculations, and plans and specifications
showing all stormwater conveyances and system details.
1. PROJECT INFORMATION
Project Name:
Avenir
Contact Person; Charles Cazier Phone Number: [phone]
For projects with multiple infiltration systems, a supplement form must be completed for each system. This
worksheet applies to: Trench 3 in Drainage Area 4
(front plans) (fronn Form SWU-101)
[.I. DESIGN INFORMATION (attach supporting calculations/documentation):
Soils Report Summary (hosed upon an actual field investigation and soil horings)
Soil Type Light_Brown Fine Sand
Infiltration Rate 2.0 in/hr or cf/hr/sf (circle appropriate units)
S H WT Elevation 8.25 fmsl (Seasonal High Water Table elevation)
Trench Design Parameters
Design Volurne
Design Storm
Drawdown Time
Perforated Pipe Size
Perforated Pipe Length
No, Observation Wells
Stone Type (if used)
Stone Void Ratio
9885 c.f
inch event (1.5 inch event for SA wafers, I inch evoni for whets)
1.0 days
8� ' / 12"� inch diameter
338' /450' ft.
NA
_#57 crushed granite
0.40
Trench Elevations (in feet mean sea level)
Bottom Elevation 10.25 fmsl
Storage/Overflow Elevation 14.25 fmsl
(may be required on a case -by -case basis)
SWU-107 Rcv 3.99 Pagel U4

'I'r-ench Dimensions
I-leight
Width
11
ft. Length
263', 160' ft
15', 25' ft. Volume Provided 12,994.E cu.ft.
Ili. 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, November 1995) 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. Attach justification if a requirement has not been met.
Applicants Initials
G_X1 a. System is located 50 feet from class SA waters and 30 feet from other surface waters.
(� b. System is located at least 100 feet from water supply wells.
c. Bottom of system is at least 2 feet above the seasonal high water table.
d. Bottom of the system is 3 feet above any bedrock or impervious soil horizon.
e. Off-line system, runoff is excess of the design volume bypasses the system (bypass detail
provided).
< J� f System is designed to draw down the design storage volume to the proposed bottom
elevation under seasonal high water conditions within five days based upon infiltration
through the bottom only (a hydrogeologic evaluation may be required).
G326 g. Soils have a minimum hydraulic conductivity of 0.52 inches per hour.
h. System is not sites on or in fill material or DWQ approval has been obtained.
C G i. Plans ensure that the installed system will meet design specifications (constructed or
restored) upon initial operation once the project is complete and the entire drainage area is
stabilized.
j. System is sized to take into account the runoff at the ultimate built -out potential from all
surfaces draining to the system, including any off -site drainage.
G� k. System is located in a recorded drainage easement for the purposes of operation and
maintenance and has recorded access easements to the nearest public right-of-way.
�[ I. System captures and infiltrates the runoff from the first 1.0 inch of rainfall (1.5 inch event
for areas draining to SA waters).
[� m. Drainage area for the device is less than 5 acres.
C_ n. A pretreatment device ( filter strip, grassed swale, sediment trap, etc.) is provided.
��- o. Trench bottom is covered with a layer of clean sand to an average depth of 4 inches.
CD(_ p. Sides of infiltration trench are lined with geotextile fabric.
GDL q. Rock used is free of fines (washed stone) and has large void ratio.
6 r. Side to bottom ratio is less than 4:1.
SWU-107 Rev 3,99 Page 2 of 4

_.0 DC, s. Observation well(s) are provided (case -by -case basis).
CDC t . Vegetated filter is provided for overflow (50 feet for SA waters, 30 feet for other waters) and
detail is shown on plans.
r_I(_ u . A benchmark for checking sediment accumulation is provided.
IV. UNDERGROUND INFILTRATION TRENC14 OPERATION AND MAINTENANCE AGREEMENT
After every runoff producing rainfall event and at least monthly inspect the bypass/overflow structure for
blockage and deterioration and the infiltration system for erosion, trash accumulation, grass cover, and general
condition.
2. Repair eroded areas immediately, re -seed as necessary to maintain adequate vegetative cover, mow vegetative
cover to maintain a maximum height of six inches, and remove trash and blockages as needed to maintain
system performance.
3. Remove accumulated sediment annually or when depth is reduced to 75% of the original design depth. Restore
depth to original design depth without aver -excavating. Over -excavating may cause the required water table
separation to be reduced and may compromise the ability of the system to perform as designed.
4. The water level in any monitoring wells will be recorded after a 1 inch rainfall event and at least once a month.
Chronic high water table elevations {within I foot of the bottom of the system for a period of three months)
shall be reported to DWQ immediately.
If DWQ determines that the system is failing, the system will immediately be repaired or replaced to original
design specifications. If the system cannot be repaired to perform its design function, other stormwater control
devices as allowed by NCAC 2H .1000 must be designed, approved and constructed.
Remove accumulated sediment from the infiltration system annually or when depth in the unit is reduced
to 75% of the original design depth. The system shall be restored to the original design depth without
over -excavating. Over -excavating may cause the required water table separation to be reduced and may
compromise the ability of the system to perform as designed. Removed sediment shall be disposed of in
an appropriate manner and shall not be handled in a manner that will adversely impact water quality (i.e.
stockpiling near a stormwater treatment device or stream, etc.).
A benchmark shall be established in the infiltration system. The benchmark will document the original
design depth so that accurate sediment accumulation readings can be taken. The measuring device used
to determine the depth at the benchmark shall be such that it will give an accurate depth reading and not
readily penetrate into accumulated sediments.
When the depth at the benchmark reads 0.75' , the accumulated sediment shall be removed from
the system.
S W U-107 Rev 3.99 Paige 3 of 4

I acknowledge and agree by my signature below that I am responsible for maintaining the stormwater
collection system in accordance with the six 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 and Title: Christopher G. Yerkes, Project Manager
Address: Plantation Inc. P.O. Box 2473 Wilmington, NC 28402
Phone: [phone] Da e Z_
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 bee named the president.
1 Della C. Baird , a Notary Public for the Slate of North Carolina , County of
Pender do hereby certify that Christopher C. Yerkes personally appeared before me this
2S day of March 2002 , and acknowledge the due execution of the forgoing infiltration
hasin maintenance requireinenis, Witness my hand and official seal,
NoTAr? ' 4
;may' PUBL%G w
SEAL My commission expires Octobcr 15, 2006
S W U- l 07 Rev 3.99 Page 4 of 4