SW8970839_CURRENT PERMIT_20020812

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

�'�� W AT '
,o 6-
1
O V11`A
Mr. Haddon Allen, President
Benser, LLC
2413 Mimosa Place
Wilmington, NC 28403
Dear Mr. Allen:
Michael F. Easley, Governor
William G. Ross, Jr., Secretary
North Carolina Department of Environment and Natural Resources
Alan W. Klimek, P.E., Director
Division of Water Quality
Wilmington Regional Office
August 12, 2002
Subject: Permit No. SW8 970839 Modification
The Enclave
High Density Stormwater Project
New Hanover County . .
The Wilmington Regional Office received a complete Stormwater Management Permit
Application for The Enclave on July 25, 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 970839 Modification dated
August 12, 2002, for the construction of The Enclave.
This permit shall be effective from the date of issuance until August 12, 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, NTC 27611-7447. Unless such demands are made this
permit shall be final and binding. ray ,
If you have any questions, or need additional information concerning this matter, please contact
Noelle Lutheran, or me at [phone]. 4
Sincerely, ,
Rick Shiver
Water Quality Regional Supervisor
RSS/nml: S:1WQSISTORMWATIPERMIT1970839.AUG
cc: Charlie Cazier
City of Wilmington Building Inspections
Beth E. Wetherill, New Hanover County Engineering
Division of Coastal Managment
Noelle Lutheran
'Wilmington Regional Office
Central Files
AVIM
NICDEttiiFt
N.C. Division of Water Quality 127 Cardinal DriveExtension Wilmington, N.C. 28405 [phone] Fax [phone] Customer service
800-623-7748

State Stormwater Management Systems
Permit No. SIA'S 970539 Modification
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
Benser, LLC
The Enclave
New Hanover Count}
FOR THE
construction, operation and maintenance of an infiltration basin 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 August 12, 2012, and shall be
subject to the following specified conditions and limitations:
1. DESIGN STANDARDS
1. This permit is effective only with respect to the nature and volume of stormwater
described in the application and other supporting data.
2. This stonnwater 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 52,072 square feet of impervious area.
3. The tract will be limited to the amount of built -upon area indicated on page 3 of this
permit, and per approved plans.
4. All stormwater collection and treatment systems must be located in either dedicated
common areas or recorded easements. The final plats for the project will be recorded
showing all such required easements, in accordance with the approved plans.
5. The runoff from all built -upon area within the permitted drainage area of this project must
be directed into the permitted stormwater control system. 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 Stormwater Management Systems
Permit No. SW8 970839 Modification
DIVISION OF
MIATER QUALITY
PROJECT DESIGN DATA SHEET
-- - -Project Name: -
The -Enclave -
Permit Number:
SW8 970839 Modification
Location:
New Hanover County
Applicant:
Mr. Haddon Allen, President
Mailing Address:
Benser, LLC
2413 Mimosa Place
Wilmington, NC 28403
Application Date:
July 25, 2002
Receiving Stream/River Basin/Index #: _
Cape Fear / Burnt Mill Creek./ 18-74-63-2
Classification of Water Body:
"C Sw"
Pond Depth, feet:
1.7
Bottom Elevation, FMSL:
9.0
Drainage Area, acres:
3.22
Total Impervious Surfaces, ftz:
52,072
Offsite Area entering Pond, ftl:
none, per Engineer
Required Storage Volume, ft3:
4,339
Provided Storage Volume, ft3:
5,2$8
Temporary Storage Elevation, FMSL:
10.7
Controlling Orifice: overflow structure (12 FMSL)
Soil Type: Baymeade/Sand
Infiltration Rate, in/hr-. 6.0
Seasonal High Water Table, FMSL: 4.0
Drawdown Time, hours: 3.1
3

State Stormwater Management Systems
Permit No. SW8 974839 Modification
It. SCHEDULE OF COMPLIANCE
1. The stormwater management system shall be constructed in it's entirety, vegetated and
W - --" 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 al] times provide the operation and maintenance necessary to assure
the permitted stormwater system functions at optimum efficiency. The approved
Operation and Maintenance Plan must be followed in its entirety and maintenance must
occur at the scheduled intervals including, but not limited to:
a. Semiannual scheduled inspections (every 6 months).
b. Sediment removal.
C. Mowing and revegetation of slopes and the vegetated filter.
d. Immediate repair of eroded areas.
e. Maintenance of all slopes in accordance with approved plans and specifications.
f. Debris removal and unclogging of outlet structure, orifice device, flow spreader,
catch basins and piping.
g. Access to the outlet structure must be available at all times.
4. Records of maintenance activities must be kept and made available upon request to
authorized personnel of DWQ. The records will indicate the date, activity, name of
person performing the work and what actions were taken.
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.
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.
S. If the stormwater system was used as an Erosion Control device, it must be restored to
design condition prior to operation as a stormwater treatment device, and prior to
occupancy.of the facility.
9. The permittee shall submit to the Director and shall have received approval for revised
plans, specifications, and calculations prior to construction, for any modification to the
approved plans, including, but not limited to, those listed below:
a. Any revision to any item shown on the approved plans, including the stormwater
management measures, built -upon area, details, etc.
b. Project name change.
C. Transfer of ownership.
d. Redesign or addition to the approved amount of built -upon area or to the drainage
area.
C. 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 Stormwater Management Systems
Permit No. SW8 970839 Modification
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'cons&d- tion:.. --_ --- - - - _
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 maynotify-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. 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 stormwater control
must follow the guidelines established in the North Carolina Erosion and Sediment
Control Planning and Design Manual.

State Stormwater Management Systems
Permit No. SW8 970839 Modification
S. Approved plans and specifications for this project are incorporated by reference and are
enforceable parts of the permit.
- 9. The pennittee shall notify the Division any name, ownership or mailing address changes
within 30 days.
- Permit issued.this the 12th day of August, 2002.
NORTH CAROLINA ENVIRONMENTAL MANAGEMENT COMMISSION
_ Alan W. Klimek, P.E., Director
Division of Water Quality
By Authority of the Environmental Management Commission
3

State Stormwater Management Systems
Permit No. SW8 970839 Modification
The Enclave
Stormwater Permit No. SW8 970839 Modification
_ _.._. -New Hanover County
Designer's Certification
as a duly registered
in the State of North Carolina, having been authorized to
observe (periodically/weekly/full time) the construction of the project,
(Prof 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:
Signature
Registration Number
Date
SEAL
7

State Stormwater Management Systems,
Permit No. SW8 970839 Modification
Certification Requirements:
1. The drainage area to the system contains approximately the permitted acreage.
2. The drainage area to the system contains -no more than the permitted amount of _
-built-upon area. -
3. All the built -upon area associated with the project is graded such that the runoff
drains to the system.
4. The outlet/bypass structure elevations are per the approved plan.
5. The outlet structure is located per the approved plans.
Tb. 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 drawdown 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
City of Wilmington, New Hanover County Building Inspections
I

State of North Carolina
Department of Environment and Natural Resources
Division of Water Quality
4t,)8s7bfIq
STORMWATER MANAGEMENT PERMIT APPLICATION FORM
This form may be photocopied for use as an original
I. GENERAL INFORMATION
1. Applicants name (specify the name of the corporation, individual, etc. who owns the project):
2. Print Owner/Signing Official's name and title (person legally responsible for facility and compliance):
Haddon Allen, President
3. Mailing Address for person listed in item 2 above:
2413 Mimosa Place
City: Wilmington _ T State: NC Zip: 28403
Telephone Number: 910-791-9773
4. Project Name (subdivision, facility, or establishment name — should be consistent with project name on
plans, specifications, letters, operation and maintenance agreements, etc.):
The Enclave
5. Location of Project (street address):
755 if west of the intersection of SR 1302 and USHwy 17/74 on Market Street_
City: Wilmington County: New Hanover^
6. Directions to project (from nearest major intersection):
755 if west of the intersection of SR 1302 and USHwy 17174 on Market Street
7. Latitude : N 340 14' 00" Longitude: W 770 55' 00" _i of project
8. Contact person who can answer questions about the project:
Name: Charles Cazier Telephone Number: 910-763-5100
IT. PERMIT INFORMATION:
1. Specify whether project is (check one):
New Renewal X Modification
Form SWU-101 Version 3.99 Page 1 of 4

2. If this application is being submitted as the re It of a renewal or modification to an existing permit, list
The existing permit number SW8 971227 and its issue date (if known) 4/16/98
3. Specify the type of project (check one):
Low Density X High Density Redevelop General Permit Other
4. Additional Project Requirements (check applicable blanks):
CAMA Major X Sedimentation/Erosion Control 404//401 Permit NPDES Stormwater
Information on required state permits can be obtained by contacting the Customer Service Center at
1-877-623-6748.
III. PROJECT INFORMATION
1. In the space provided below, summarize how stormwater will be treated. Also attach a detailed narrative
(one to two pages) describing stormwater management for the project.
stormwater will be handled by an open infiltration basin
2. Stormwater runoff from this project drains to the Cape Fear River basin.
3. Total Project Area: 3.22 acres
5. How many drainage basins does the project have? I
4. Project Built Upon Area: 37.12 %.
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.
/� �:+:..:... :::i..:is•;i::::r:..r:.a:.a: :.: �'.::...::.5:: �:: �:::.: •::;c: •:. �S:
'::il'iiiiiiC'vvvi•:{::.4vi.:.
).. :.... n:::::.�.. � i.•v :::..�.}; i:: _:•
o:ui:::',•'':a :::<::;.1'..
••��i:
.:»:::cirri:::: ::
vi'iCii
;:r:.r.
':':l'v:':':':'S.i's:
Receiving Stream Name
Burnt Mill Creek
Receiving Stream Class
C-SW
Drainage Basin Area
3.22 ac
Existing Impervious * Area
-
Proposed Impervious * Area
1.20 ac
% impervious* Area (total)
37.12%
:?ry •. v+:;i......
...
r..i
....: r.. v...v: i:: i:: i. .. ..::. .. r.... r.
�:.r�:::: x•:,v.r :.. :..:::::. .. "::' :v:. �: ...... r.::. �.:. .:.::..'
5:..v::.vr;.v:.:}�..i : i:...3 •.:.:.�..�.::::.
.... .: �.. �.: �: :20:•:Ci:;4ii ii:ii r.
On -site Buildings
25,296 sf
On -site Streets
On -site Parking
21,822 sf
On -site Sidewalks
4,954 sf
Other on -site
Off site
Total:
E=52,072 sf
Y-_
* Impervious area is defined cis the built upon area including, but not limited to, buildings, roads, parking
areas sidewalks, gravel areas, etc.
Fomi SWU-101 Version 3.99 Page 2 of 4

7. How was the off -site impervious area listed above derived?
IV. DEED RESTRICTIONS AND PROTECTIVE COVENANTS
The following italicized deed restrictions and protective covenants are required to be recorded for all
subdivisions, outparcels and future development prior to the sate 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 of the State.
2. No more than square feet ofany lot shall be covered by structures of impervious materials.
Impervious materials include asphalt, gravel, concrete, brief stone, slate or similar material but do not include wood
decking or the water surface ofs wimming pools.
3. %vales shall not be filled in, piped or altered except as necessary to provide driveway crossings.
4. Built -upon area in excess r f the permitted amount requires a state stormwater management permit madhftuttion prior
to construction.
5 All permitted runofffrom outparcels or future development .shall be directed into the permitted stormwater control
system. These connections to the stormwater control system shall be performed in a manner that maintains the
integrity and performance of the system as permitted
By your signature below, you certify that the recorded deed restrictions and protective covenants for this project
shall include all the applicable items required above, that the covenants will be binding on all parties and
persons claiming under them, that they will run with the land, that the required covenants cannot be changed or
deleted without concurrence from the State, and that they will be recorded prior to the sale of any lot.
V. SUPPLEMENT FORMS
The applicable state stormwater management permit supplement form(s) listed below must be submitted for
each BMP specified for this project. Contact the Stormwater and General Permits Unit at [phone] for
the status and availability of these forms.
Form SWU-102
Wet Detention Basin Supplement
Form SWU-103
Infiltration Basin Supplement
Form SWU-104
Low Density Supplement
Form SWU-105
Curb Outlet System Supplement
Form SWU-106
Off -Site System Supplement
Form SWU-107
Underground Infiltration Trench Supplement
Form SWU-108
Neuse River Basin Supplement
Form SWU-109
Innovative Best Management Practice Supplement
Form SWU-101 Version 3.99 Page 3 oF4

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.
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
• One copy of the applicable Supplement Form(s) for each 13M P (�
• Permit application processing fee of $420 (payable to NCDENR)
• Detailed narrative description of stormwater treatnientlmanagement C DL
• 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)
VI1. AGENT AUTHORIZATION
If you wish to designate authority to another individual or firm so that they may provide information on your
behalf, please complete this section.
Designated agent (individual or firm): Tripp Engineering. P.C.
Mailing Address: 419 Chestnut Street
City: Wilmington _ State: NC Zip: 28401
Phone: (910}_ 763-5100 Fax: [phone]
Vlll. APPLICANT'S CERTIFICATION
I, (print or type name of person listed in General Information, item 2) Haddon Allen_
certify that the information included on this permit application form is, to the best of my knowledge, correct and
that the project will be constructed in conformance with the approved plans, that the required deed restrictions
and protective covenants will be recorded, and that the proposed project complies with the requirements of 15A
1►
Date: a
/,o�9 :e2
Form SWU-101 Version 3.99 Page 4 of 4

Permit No.q!
(to be provided by DWQ))
State of North Carolina 70 k39 Ih-
Department of Environment and Natural Resources
Division of Water Quality
STORMWATER MANAGEMENT PERMIT APPLICATION FORM
INFILTRATION BASIN SUPPLEMENT
This form ntay 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
infiltration basin supplement for each system, design calculations, soils report and plans and specifications
showing all stormwater conveyances and system details.
I. PROJECT INFORMATION
Project Name: The
Contact Person: Charles Cazier Phone Number: 910 _763-5100
This worksheet applies to : Basin No. 1 in Drainage Area 1
(as identified on plans) (front Farm SWU-101)
11. DESIGN INFORMATION — Attach supporting calculations/documentation. The soils report must be
based upon an actual field investigation and soil borings. County soil maps are not an acceptable
source of soils information. All elevations shall be in feet mean sea level ffmsl).
Soils Report Summary
Sol] Type Ba, meade
Infiltration Rate 6 in hr r cf/hr/sf (circle appropriate units)
SHWT Elevation 4.0 fmsl (Seasonal High Water Table elevation)
Basin Design Parameters
Design Storm ] .0 inch (1.5 inch event for SA waters, I inch event for others)
Design Volume 4,490 c.f.
Drawdown Time 3.1 days hours
Basin Dimensions
Basin Size 34.67 ft. x 75 ft. = 2,600_sq. ft. (bottom dirnensions)
Basin Volume Provided .5 288 c.f.
Basin Elevations
Bottom Elevation 9.0 fmsl
Storage Elevation 10.7 fmsl
Top Elevation 13.0 fmsl
Form SWU-103 Rev 3.99 Page I of 3

III. REQUIRED ITEMS CHECKLIST
The following checklist outlines design requirements per the Stormwater Best Management Practices Manual
(N.C. Department of Environment, Health and Natural Resources, February 1999) and Administrative Code
Section: 15 A NCAC 2H .1008.
Initial in the space provided to indicate the following design requirements have been met and supporting
documentation is attached. If the applicant has designated an agent in the Stormwater Management Permit
Application Form, the agent may initial below. 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.
CD(_ c. Bottom of system is at least 2 feet above the seasonal high water table.
CLZ d. Bottom of system is 3 feet above any bedrock or impervious soil horizon.
C.[,_7� e. System is not sited on or in fill material or DWQ approval has been obtained
ODD. f. 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.
�^ C1 g. Drainage area for the device is less than 5 acres.
CDG h- Soils have a minimum hydraulic conductivity of 0.52 inches per hour and soils report is
attached.
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). Design volume and infiltration calculations attached.
CGS_ 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. Calculations attached.
* k. All side slopes stabilized with vegetated cover are no steeper than 3:1(H:V)�:l & sodded
CDC_ 1. A pretreatment device such as a catch basin, grease trap, filter strip, grassed Swale or
sediment trap is provided.
m. Bottom of the device is covered with a layer of clean sand to an average depth of 4 inches
or dense vegetative cover is provided.
* n. Vegetated filter is provided for overflow and detail is shown on plans (Required minimum
length is 50 feet for SA waters, 30 feet for other waters) .
S OFkPC>AJ f:P-0l-J SHIaWT 'f::� t-1r1rJ4 Ir4Fr1gP.4TtcAJ fr TE. FILTF2. NJvT NIM)
NA o. Flow distribution mechanism within basin is provided.
r
p. A benchmark is provided to determine the sediment accumulation in the pretreatment
device.
NA q. Runoff in excess of design volume bypasses off-line systems (bypass detail provided).
r . System is designed to draw down the design storage volume to the proposed bottom
elevation under seasonal high water conditions within five days. A soils report and all
pertinent draw -down calculations are attached.
s. Plans ensure that the installed system sill meet design specifications (constructed or
restored) upon initial operation once the project is complete and the entire drainage area
is stabilized.
Form SWU-103 Rev 3.99 Page 2 of 3

i

IV, ,' INFILTRATION BASIN OPERATION AND MAINTENANCE AGREEMENT
1. After every runoff producing rainfall event and at least monthly, inspect 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 as needed.
3. After every runoff producing rainfall event and at least monthly inspect the bypass, inflow and overflow
structures for blockage and deterioration. Remove any blockage and repair the structure to approved
design specifications.
4. Remove accumulated sediment from the pretreatment system and infiltration basin annually or when
depth in the pretreatment 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 pretreatment unit. 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 design depth reads 0.75 feet in the pretreatment unit, the sediment shall be removed
from both the pretreatment unit and the infiltration basin.
5. If the Division determines that the system is failing, the system will immediately be repaired 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.
l acknowledge and agree by my signature below that I am responsible for the performance of the five
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: Haddon Allen, President
Address:
Phone:
Signature:
ate:
�� -J
Note: The legally responsible party should not be a hotneowners association unless niorb than 50% of the lots have been sold and
a resident of the subdivision has been nanied the president.
I, Della C. Baird , a Notary Public for the State of North Carolina , County of
Pender_ , do hereby certify that Haddon Allen personally appeared before me this
ZZ day of July _ 2002 , and acknowledge the due execution of the forgoing infiltration basin maintenance
Oce.
uuu,
requircments``,r�/Nnd and official seal,
O • pTgR' O 6aJ
N Y
SEAL = • a = My commission expires October 15, 2006
PUBLIG : �;\Z
�11- ti 4ti�
Form S WU-103 1Yi� �. 9' Page 3 of 3