SW8031207_CURRENT PERMIT_20040518

STORMWATER DIVISION CODING SHEET
POST -CONSTRUCTION PERMITS
PERMIT NO.
SW
DOC TYPE
� CURRENT PERMIT
❑ APPROVED PLANS
❑ HISTORICAL FILE
❑ COMPLIANCE EVALUATION INSPECTION
DOC DATE
�b71�F.pvr��
YYYYMMDD

OF WA7-FR Michael F Easley, Governor
�a p William G Ross Jr Secretary
�O G North Carolina Department of Environment and Natural Resources
> Alan W Klimek P E ,Director
O Division ofWvater Quality
Coleen H Sullins, Deputy Director
Division of Water Quality
May 18, 2004
Mr Jonathan L Mason, Member/Manager
White Oak, LLC, General Partner
White Oak Apartments, LP
PO Box 10284
Wilmington, NC 28404
Subject: Stormwater Permit No. SW8 031207
White Oak Apartments
High Density Project
New Hanover County
Dear Mr Mason
The Wilmington Regional Office received a complete Stormwater Management Permit
Application for White Oak Apartments on March 9, 2004 Staff review of the plans and
specifications has determined that the protect, as proposed, will comply with the
Stormwater Regulations set forth in Title 15A NCAC 2H 1000 We are forwarding
Permit No SW8 031207 dated May 18, 2004, for the construction of the subject protect
This permit shall be effective from the date of issuance until May 18, 2014, 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 150E of the North Carolina General Statutes, and filed
with the Office of Administrative Hearings, P 0 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 IWQSISTORMWATIPERMIT1031207 may04
cc Phil Tripp, P E, Tripp Engineering
Tony Roberts, New Hanover County Building Inspections
Beth E Wetherill, New Hanover County Engineering
Linda Lewis
Wilmington Regional Office
Central Files
N C Division of Water Quality 127 Cardinal Drive Extension [phone]
Wilmington Regional Office Wilmington NC 28405 [phone] Fax
Customer Service
1 800 623-7748
z�a
NERR

State Stormwater Management Systems
Permit No SW8 031207
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
Jonathan L Mason, White Oak, LLC, White Oak Apartments, LP
White Oak Apartments
New Hanover County
FOR THE
construction, operation and maintenance of a non -discharging infiltration basin in
compliance with the provisions of 15A NCAC 2H 1000 {hereafter referred to as the
"stormwater rulesl 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 May 18, 2014, 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
descnbed in the application and other supporting data
2 This stormwater system has been approved for the management of stormwater
runoff as descnbed on page 3 of this permit, the Project Data Sheet The
stormwater control has been designed to handle the runoff from 83,195 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 pnor to the construction of
additional built -upon area from outside of the approved drainage area
Page 2 of 8

f
e
oLcIL� owfl[Iwalef management Systems
Permit No SW8 031207
DIVISION OF WATER QUALITY
PROJECT DESIGN DATA SHEET
Project Name
Permit Number
Location
Applicant
Mailing Address
Application Date
Receiving Stream/River Basin
Stream Index Number
Classification of Water Body,
Drainage Area, Gres
Onsite, ft�
i Offsite, ft2
Total Impervious Surfaces, ft2
Basin Depth, feet
TSS removal efficiency
Bottom Elevation, FMSL
Permitted Surface Area, ft2
Permitted Storage Volume, ft3
Temporary Storage Elevation, FMSL
Type of Soil
Expected Infiltration Rate, inlhr
Seasonal High Water Table Elev
Time to Draw down, hours
White Oak Apartments
SW8 031209
New Hanover County
Jonathan L Mason, Member/Manager
White Oak, LLC, General Partner
White Oak Apartments, LP
PO Box 10284
Wilmington, NC 28404
March 9, 2004
Pages Creek I Cape Fear
CPF24 18-87-1-(1)
"SA"
673
293,158
0
83,195
1 75
90% (no filter is required)
29
17,979@Bottom
36,036
3075
Fine -Medium Sand
07
27 0 FMSL
47
Page 3 of 8

State Stormwater Management Systems
Permit No SW8 031207
II SCHEDULE OF COMPLIANCE
The stormwater management system shall be constructed in its entirety,
vegetated and operational for its intended use prior to the construction of any
built -upon surface
2 During construction, erosion shall be kept to a minimum and any eroded areas of
the system will be repaired immediately
3 The permittee shall at all times provide the operation and maintenance
necessary to assure the permitted stormwater system functions at optimum
efficiency The approved Operation and Maintenance Plan must be followed in
its entirety and maintenance must occur at the scheduled intervals including, but
not limited to
a Semiannual scheduled inspections (every 6 months)
b Sediment removal
c Mowing and revegetation of slopes and the vegetated filter
d Immediate repair of eroded areas
e Maintenance of all slopes in accordance with approved plans and
specifications
f Debris removal and unclogging of outlet structure, flow spreader, catch
basins and piping
g Access to the infiltration basin and outlet structure must be available at all
times
4 Records of maintenance activities must be kept and made available upon
request to authorized personnel of DWQ The records will indicate the date,
activity, name of person performing the work and what actions were taken
5 The facilities shall be constructed as shown on the approved plans This permit
shall become voidable unless the facilities are constructed in accordance with
the conditions of this permit, the approved plans and specifications, and other
supporting data
6 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
7 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
8 At least 30 days 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
Page 4 of 8

Z[a1e OLQrmwaier management Systems
Permit No SW8 031207
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
e Further subdivision, acquisition, or sale of all or part of the project area
The project area is defined as all property owned by the permittee, for
which Sedimentation and Erosion Control Plan approval or a CAMA Major
permit was sought
f Filling in, altenng, or piping of any vegetative conveyance shown on the
approved plan
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 pnor 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 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
13 The Director may notify the permittee when the permitted site does not meet one
or more of the minimum requirements of the permit Within the time frame
specified in the notice, the permittee shall submit a wntten time schedule to the
Director for modifying the site to meet minimum requirements The permittee
shall provide copies of revised plans and certification in wnting to the Director
that the changes have been made
14 The permittee must maintain the current permitted drainage area No additional
runoff from outside of the permitted drainage area boundary may enter the
permitted stormwater facilities without first applying for and receiving a permit
modification
III. GENERAL CONDITIONS
This permit is not transferable except after notice to and approval by the Director
In the event of a change of ownership, or a name change, the permittee must
submit a formal permit transfer request to the Division of Water Quality,
accompanied by a completed name/ownership change form, documentation
from the parties involved, and other supporting materials as may be appropnate
The approval of this request will be considered on its ments and may or may not
be approved The permittee is responsible for compliance with all permit
conditions until such time as the Division approves the transfer request The
dissolution of the limited partnership and/or limited liability company does not
preclude the permittee from complying with all permit conditions
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, ,n
accordance with North Carolina General Statute 143-215 6A to 143-215 6C
Page 5 of 8

State Stormwater Management Systems
Permit No SW8 031207
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
fling of a request for a permit modification, revocation and reissuance or
termination does not stay any permit condition
7 Unless specified elsewhere, ppermanent seeding requirements for the stormwater
control must follow the guidelines established in the North Carolina Erosion and
Sediment Control Planning and Design Manual
8 Approved plans and specifications for this project are incorporated by reference
and are enforceable parts of the permit
9 The permittee shall notify the Division any name, ownership or mailing address
changes within 30 days
Permit issued this the 1 8th day of May, 2004
NORTH CAROLINA ENVIRONMENTAL MANAGEMENT COMMISSION
Alan W Klimek, P E, Director
Division of Water Quality
By Authority of the Environmental Management Commission
Page 6 of 8

VUd1I I IVV QIcI IV I4211O 01I ICI IL Jyb LIZII IS
Permit No SW8 031207
White Oak Apartments
Stormwater Permit No SW8 031207
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 protect,
(Protect)
for (Protect Owner) hereby state that, to the
best of my abilities, due care and diligence was used in the observation of the protect
construction such that the construction was observed to be built within substantial
compliance and intent of the approved plans and specifications
The checklist of items on page 2 of this form is included in the Certification
Noted deviations from approved plans and specification
Signature
Registration Number
Date
SEAL
Page 7of8

State Stormwater Management Systems
Permit No SW8 031207
Certification Requirements
1 The drainage area to the system contains approximately the permuted
acreage
2 The drainage area to the system contains no more than the permitted
amount of built -upon area
3 All the built -upon area associated with the project is graded such that the
runoff drains to the system
4 All roof drains are located such that the runoff is directed into the system
5 The outlet/bypass structure elevations are per the approved plan
__.. 6 The outlet structure is located per the approved plans
7 Trash rack is provided on the outlet/bypass structure
8 All slopes are grassed with permanent vegetation
9 Vegetated slopes are no steeper than 3 1
10 The inlets are located per the approved plans and do not cause short-
circuiting of the system
11 The permitted amounts of surface area and/or volume have been
provided
12 Required drawdown devices are correctly sized per the approved plans
13 All required design depths are provided
14 All required parts of the system are provided, such as a vegetated shelf,
and a forebay
15 The required system dimensions are provided per the approved plans
cc NCDENR-DWQ Regional Office
Tony Roberts, New Hanover County Building Inspections
Page 8 of 8

9P¢�eEg af�Ee i8 P F f �d �g �3 €
j
ia} i 3 i gegiPisDate Received Fee Paid Permit Number
al —2 —6 3 63 /.)-.-D
State of North Carolina
Department of Environment and Natural Resources
Division of Water Quality
STORMWATER MANAGEMENT PERMIT APPLICATION FORM
This form may be photocopied for use as an original
I. GENERAL INFORMATION
1 Applicants name (specify the name of the corporation, individual, etc who owns the project)
White Oak Apartments, LP
2 Print Owner/Signing Official's name and title (person legally responsible for facility and compliance)
-Jen Mason Member Manager, White Oak LLC General Partner
-16n _- %h 2-11
3 Mailing Address for person listed in item 2 above
P O Box 10284
City Wilmin on State NC Zip 28404
Telephone Number 686-4048
4 Project Name (subdivision, facility, or establishment name — should be consistent with project name on
plans, specifications, letters, operation and maintenance agreements, etc )
White Oak Apartments
5 Location of Project (street address)
225 Middle Sound Loop Road
City Wilmin on County New Hanover _
6 Directions to project (from nearest major intersection)
Approx 700 If north of the intersection of Middle Sound Loop Road and Darden Road
7 Latitude N 340 16' 30" Longitude W 770 48' 00" of project
8 Contact person who can answer questions about the project
Name Phillip TrippTelephone Number 910-763-5100
II PERMIT INFORMATION
1 Specify whether project is (check one)
X New
Form SWU-101 Version 3 99 Page I of
Renewal Modification

2 If this application is being submitted as the result of a renewal or modification to an existing permit, list
The existing permit number and its issue date (if known)
3 Specify the type of project (check one)
Low Density X High Density Redevelop General Permit Other
4 Additional Project Requirements (check applicable blanks)
CAMA Major X Sedimentation/Erosion Control 404//401 Permit NPDES Stormwater
Information on required state permits can be obtained by contacting the Customer Service Center at
1-877-623-6748
III PROJECT INFORMATION
I In the space provided below, summarize how stormwater will be treated Also attach a detailed narrative
(one to two pages) describing stormwater management for the project
stormwater will be treated through an infiltration basin
2 Stormwater runoff from this project drams to the Cape Fear River basin
3 Total Project Area 6 73 acres
5 How many drainage basins does the project have9 1
4 Project Built Upon Area 284 %
6 Complete the following information for each drainage area If there are more than two drainage areas in the
project, attach an additional sheet with the information for each area provided in the same format as below
Basin,Inforn""ahon ; � �'', , ;` �
s� �� 1i
` �� g
a ° Dra�na a Basin l �'
� , F ;L
�DramagegBasih 2 a
Receiving Stream Name
Trib to Pages Creek
Receiving Stream Class
SA
Drainage Basin Area
6 73 ac
Existing Impervious * Area
-
Proposed Impervious * Area
1 92 sc
% Impervious* Area (total)
28 4%
qa Itl� F
a;hnpeyrvl us�9iiP" Suu�rfaG,eI,'A�rea'� ml$wj
I1 d7gtQ6nc[w�xtN {?t s h tt F sit , tBE zeeEi
On -site Buildings
28,300 sf
On -site Streets
On -site Parking
43,320 sf
On -site Sidewalks
11,575 sf
Other on -site
Off -site
Total
E=83,195 sf
E=
* Impervious area is defined as the built upon area including, but not limited to, buildings, roads, parking
areas sidewalks, gravel areas, etc
Form SWU-101 Version 3 99 Page 2 of

r
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 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 of arty lot shall be covered by structures of impervious materials
Impervious materials include asphalt, gravel, concrete, brick stone, slate or similar material but do not include wood
decking or the water surface of swimmingpools
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 managementpermit modification 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 bmdmg on all parties and
persons claiming under them, that they will run with the land, that the required covenants cannot be changed or
deleted without concurrence from the State, and that they will be recorded prior to the sale of any lot
V SUPPLEMENT FORMS
The applicable state stormwater management permit supplement form(s) listed below must be submitted for
each BMP specified for this project Contact the Stormwater and General Permits Unit at [phone] for
the status and availability of these forms
Form SWU-102
Wet Detention Basin Supplement
Form SWU-103
Infiltration Basin Supplement
Form SWU-104
Low Density Supplement
Form SWU-105
Curb Outlet System Supplement
Form SWU-106
Off -Site System Supplement
Form SWU-107
Underground Infiltration Trench Supplement
Form SWU-108
Neuse River Basin Supplement
Form SWU-109
Innovative Best Management Practice Supplement
Form SWU-101 Version 3 99 Page 3 of

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 BMP Z
• Permit application processing fee of $420 (payable to NCDENR)
• Detailed narrative description of stormwater treatment/management L�-
• 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)
VII. AGENT AUTHORIZATION
If you wish to designate authority to another individual or firm so that they may provide information on your
behalf, please complete this section
Designated agent (individual or firm) Tri En meenn P C
Mailing Address 419 Chestnut Street
City Wilmin on State NC Zip 28401
Phone [phone] Fax �[phone]
VIII APPLICANT'S CERTIFICATION
�JUn 2 2YI L.
1, (print or type name ofperson listed in General Information, item 2) .14an Mason ,
certify that the information included on this permit application form is, to the best of my knowledge, correct and
that the project will be constructed in conformance with the approved plans, that the required deed restrictions
and protective covenants will be recorded, and that the proposed project complies with the requirements of 15A
NCAC 2H 1000
Signature �` GG�i��:�� Date
Form SWU-101 Version 3 99 Page 4 of

Permit No S60 F 0 31 ZO-7-
(to be provided by DWQ)
State of North Carolina
Department of Environment and Natural Resources
Division of Water Quality
STORMWATER MANAGEMENT PERMIT APPLICATION FORM
INFILTRATION BASIN SUPPLEMENT
This form may be photocopted 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
1. PROJECT INFORMATION
Project Name White Oak Apartments
Contact Person Phillip TrippPhone Number 910 763-5100
This worksheet applies to Basin No 1 in Drainage Area 1
(as identified on plans) (from Form SWU-101)
II. 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 (fmsl)
Soils Report Summary
Soil Type Fine to Medium Sand
Infiltration Rate 07 inter r cf/hr/sf (circle appropriate units)
SHWT Elevation 270 fmsl (Seasonal High Water Table elevation)
Basin Design Parameters
Design Storm 1 5 inch (1 5 inch event for SA waters, 1 inch event for others)
Design Volume 11,397 c f
Drawdown Time 1 96 days
Basin Dimensions
Basin Size 36 ft x 4994 ft = 17,979 sq ft (bottom dimensions)
Basin Volume Provided 36,036 c f
Basin Elevations
Bottom Elevation 290 fmsl
Storage Elevation 3075 fmsl
Top Elevation 31 5 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
CSC- a System is located 50 feet from class SA waters and 30 feet from other surface waters
Cot, b System is located at least 100 feet from water supply wells
CQ c Bottom of system is at least 2 feet above the seasonal high water table
COX. d
Bottom of system is 3 feet above any bedrock or impervious soil horizon
Co e
System is not sited on or in fill material or DWQ approval has been obtained
Cp, _ 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
_ - g
Drainage area for the device is less than 5 acres
CQ_, h
Soils have a minimum hydraulic conductivity of 0 52 inches per hour and soils report is
attached
CX�r, i
System captures and infiltrates the runoff from the first 10 inch of rainfall (1 5 inch event
for areas draining to SA waters) Design volume and infiltration calculations attached
4:::m 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) 2 1 & sodded
nk I
A pretreatment device such as a catch basin, grease trap, filter strip, grassed swale or
sediment Iran is provided
_Cae_ in
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
f4A 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)
�L o
Flow distribution mechanism within basin is provided
CQ_ p
A benchmark is provided to determine the sediment accumulation in the pretreatment
device
C�+L 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
C 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

IV JNFILTRATION 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 a 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
I acknowledge and agree by my signature below that I am responsible for the performance of the five
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
J�n 24011 L
Print Name and Title 4em Mason, Member Manager
Address P O Box 10284 Wilmington, NC 28404-0284
Phone
Signature
Date 10 - !I--<73
Note: Th lly responsible party should not be a homeowners association unless more than 50% of the lots have been sold and
a resident of the subdivision has been named the president
1, ]—>c a. C .�, _, a Notary Public for the State of North Carolina, County of $llder
do hereby certify that Jon Mason _ personally appeared before me thisZL day of
_C�6}c6��, 2003 , and acknowledge the due execution of the forgoing infiltration basin maintenance requirements
Witness my hand and official seal,
SEAL
Form SWU-103
NOTAgy a'
UBuc cJ,,.
Rev3 t
!!llflltl111411`
My commission expires 10- js - a g
Page 3 of 3