SW8060804_CURRENT PERMIT_20061024

STORMWATER DIVISION CODING SHEET
POST -CONSTRUCTION PERMITS
PERMIT NO.
SW
lOI,&-Z/
DOC TYPE
CURRENT PERMIT
rAPPROVED
PLANS
❑ HISTORICAL FILE
❑ COMPLIANCE EVALUATION INSPECTION
DOC DATE
YYYYMMDD

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October 24, 2006
Laura J. Crane, Managing Member
Crane White, LLC
100 Edgewater Lane
Wilmington, NC 28403
Subject: Stormwater Permit No. SW8 060804
Wisteria Medical Center
High Density Project
New Hanover County
Dear Mrs. Crane:
Michael F. Easley, Governor
William G. Ross Jr., Secretary
North Carolina Department of Environment and Natural Resources
Alan W. Klimek, P.E. Director
Division of Water Quality
The Wilmington Regional Office received a complete Stormwater Management Permit Application for
Wisteria Medical Center on October 10, 2006. Staff review of the plans and specifications has
determined that the project, as proposed, will comply with the Stormwater Regulations set forth in Title
15A NCAC 2H.1000. We are forwarding Permit No. SW8 060804 dated October 24, 2006, for the
construction of the subject project.
This permit shall be effective from the date of issuance until October 24, 2016, and shall be subject to
the conditions and limitations as specified therein. Please pay special attention to the Operation and
Maintenance requirements in this permit. Failure to establish an adequate system for operation and
maintenance of the stormwater management system will result in future compliance problems.
If any parts, requirements, or limitations contained in this permit are unacceptable, you have the right to
request an adjudicatory hearing upon written request within 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 Chris
Baker, or me at [phone].
Since .ey,
C1..k213 -
Edward Beck
Regional Supervisor
Surface Water Protection Section
ENB/csb: S:IWQSISTORMWATERIPERMIT1060804.oct06
cc: Mark Hargrove, P.E., Withers & Ravenel
Tony Roberts, New Hanover County Building Inspections
City of Wilmington Stormwater Services
Beth E. Wetherill, New Hanover County Engineering
Division of Coastal Management
Chris Baker
Wilmington Regional Office
Central Files No`hCarolina
lvatura!!!l
North Carolina Division of Water Quality 1617 Mail Service Center Raleigh, NC 27699-1617 Phone [phone] Customer Service
Internet: www.newaterquality.ortt Location: 512 N. Salisbury St. Raleigh, NC 27604 Fax [phone]
An Equal Opportunity/Affirmative Action Employer — 50°% Recycled110% Post Consumer Paper

State Stormwater Management Systems
Permit No. SW8 060804
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
Laura J. Crane, Crane White, LLC
Wisteria Medical Center
New Hanover County
FOR THE
construction, operation and maintenance of an underground infiltration trench 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 October 24, 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 in Section 1.6 on page 3 of this permit. The stormwater
control has been designed to handle the runoff from 49,295 square feet of
impervious area. This trench must be operated with a 30' vegetated filter.
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.
Page 2 of 7

State Stormwater Management Systems
Permit No. SW8 050804
6. The following design criteria have been provided in the infiltration trench and
must be maintained at design condition:
a. Drainage Area, acres:
1.41
Onsite, ft2:
1.41.
Offsite, ft2:
NA
b. Total Impervious Surfaces, ft2:
49,295
C. Design Storm, inches:
1
d. Trench Dimensions, L x W x H, ft:
70 x 45.5 x 2.8
e. Perforated Pipe Diameter/Length:
24"1792 LF
f. Bottom Elevation, FMSL:
12.00
g. Bypass Weir Elevation, FMSL:
14.19
h. Permitted Storage Volume, ft3:
3,952
i. Type of Soil:
Ke, Ly
j. Expected Infiltration Rate, in/hr:
22.7
k. Seasonal High Water Table, FMSL:
10.00
I. Time to Draw Down, hours:
0.66
M. Receiving Stream/River Basin:
Silver Stream Branch 1 Cape Fear
n. Stream Index Number:
18-76-1-1
o. Classification of Water Body:
C : SW
II. SCHEDULE OF COMPLIANCE
1. The stormwater management system shall be constructed in its entirety,
vegetated and operational for its intended use prior to the construction of any
built -upon surface.
2. During construction, erosion shall be kept to a minimum and any eroded areas of
the system will be repaired immediately.
3. The permittee shall at all times provide the operation and maintenance
necessary to assure the permitted stormwater system functions at optimum
efficiency. The approved Operation and Maintenance Plan must be followed in
its entirety and maintenance must occur at the scheduled intervals including, but
not limited to:
a. Semiannual scheduled inspections (every 6 months).
b. Sediment removal
C. Mowing and revegetation of slopes and the vegetated filter.
d. Immediate repair of eroded areas.
e. Maintenance of all slopes in accordance with approved plans and
specifications.
f. Debris removal and unclogging of bypass structure, filter media, flow
spreader, catch basins, piping and vegetated filter.
g. A clear access path to the bypass structure must be available at all times.
Page 3 of 7

State Stormwater Management Systems
Permit No. SW8 050804
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. Access to the stormwater facilities shall be maintained via appropriate
easements at all times.
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, lease or sale of all or part of the project
area. The project area is defined as all property owned by the permittee,
for which Sedimentation and Erosion Control Plan approval or a CAMA
Major permit was sought.
f. Filling in, altering, or piping of any vegetative conveyance shown on the
approved plan.
10. The permittee shall submit final site layout and grading plans for -any permitted
future areas shown on the approved plans, 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. 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.
Page 4 of 7

State Stormwater Management Systems
Permit No. SW8 060804
III. GENERAL CONDITIONS
This permit is not transferable except after notice to and approval by the Director.
In the event of a change of ownership, or a name change, the permittee must
submit a formal permit transfer request to the Division of Water Quality,
accompanied by a completed name/ownership change form, documentation
from the parties involved, and other supporting materials as may be appropriate.
The approval of this request will be considered on its merits and may or may not
be approved. The permittee is responsible for compliance with all permit
conditions until such time as the Division approves the transfer request.
2. Failure to abide by the conditions and limitations contained in this permit may
subject the Permittee to enforcement action by the Division of Water Quality, in
accordance with North Carolina General Statute 143-215.6A to 143-215.6C.
3. The issuance of this permit does not preclude the Permittee from complying with
any and all statutes, rules, regulations, or ordinances, which may be imposed by
other government agencies (local, state, and federal) having jurisdiction.
4. In the event that the facilities fail to perform satisfactorily, including the creation
of nuisance conditions, the Permittee shall take immediate corrective action,
including those as may be required by this Division, such as the construction of
additional or replacement stormwater management systems.
5. The permittee grants DENR Staff permission to enter the property during normal
business hours for the purpose of inspecting all components of the permitted
stormwater management facility.
6. The permit may be modified, revoked and reissued or terminated for cause. The
filing of a request for a permit modification, revocation and reissuance or
termination does not stay any permit condition.
7. Unless specified elsewhere, permanent seeding requirements for the stormwater
control must follow the guidelines established in the North Carolina Erosion and
Sediment Control Planning and Design Manual.
8. Approved plans and specifications for this project are incorporated by reference
and are enforceable parts of the permit.
9. The permittee shall notify the Division. any name, ownership or mailing address
changes within 30 days.
Permit issued this th24th day of October, 2006.
NORT AROLINA NVlF gNMENTAL MANAGEMENT COMMISSION'
for Ain . Klimek, P.E., Director
Division of Water Quality
By Authority of the Environmental Management Commission
Page 5 of 7

State Stormwater Management Systems
Permit No. SW8 060804
Wisteria Medical Center
Stormwater Permit No. SW8 060804
New Hanover County
Designer's Certification
I, , as a duly registered
in the State of North Carolina, having been authorized to observe (periodically/ weekly/
full time) the construction of the project,
(Project)
for (Project Owner) hereby state that, to the
best of my abilities, due care and diligence was used in the observation of the project
construction such that the construction was observed to be built within substantial
compliance and intent of the approved plans and specifications.
The checklist of items on page 2 of this form is included in the Certification.
Noted deviations from approved plans and specification:
Signature
Registration Number
Date
SEAL
Page 6 of 7

State Stormwater Management Systems
Permit No. SW8 060804
Certification Requirements:
.1. The drainage area to the system contains approximately the permitted
acreage.
2. The drainage area to the system contains no more than the permitted
amount of built -upon area.
3. All the built -upon area associated with the project is graded such that the
runoff drains to the system.
4. All roof drains are located such that the runoff is directed into the system.
5. The bypass structure elevations are per the approved plan.
6. The bypass structure is located per the approved plans.
7. A 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. All required design depths are provided.
13. All required parts of the system are provided.
14. The required system dimensions are provided per the approved plans.
cc: NCDENR-DWQ Regional Office
Tony Roberts, New Hanover County Building Inspections
Page 7 of 7

'OFFICE USE_°ONLY
Date Received
Fee Paid
Permit Number
Z
D ,oa
w exo D 0 oy
State of North Carolina
Department of Environmental and Natural Resources
Division of Water Quality
STORMWATER MANAGEMENT PERMIT APPLICATION FORM
This form may be pholoeopied for apse as an original
I. GENERAL INFORMATION
Applicants name (specify the name of the corporation, individual, etc, who owns the project):
Crane White, LLC
2. Print Owner/Signing Official's name and title (person legally responsible for facility and cornpliance):
Laura J. Crane, Managing Member
3. Mailing Address for person listed in Item 2 above:
100 Edgewater Lane
City: Wilmington State: NC Zip: 99401
"Telephone Number: [phone]
4. Project Namc (subdivision, facility, or establishment name — should be consistent with project name on plans,
specifications, letters, operation and maintenance agreements, etc.):
Wisteria Medical Center
5. Location of Project (street address):
2200 Wisteria Drive
City: Wilmin tg on County: New Hanover
G. Directions to project (from nearest major intersection):
Approximately 0.5 miles northcast of the intersection of US HWY 421- Carolina Beach Rd & Medical
Center Drive.
7. Latitude: 340 12' 05"N
Longitude: 770 55' 54"W
8. Contact person who can answer questions about the project::
of project.
Name: Mark N. Hargrove- PI~ 'Telephone Number: (910) 25b-9277
II. PERMIT INFORMATION:
Form S W U-101 Version 199 Page I of 4

l . Specify whether project is (check one): X New Renewal Modification
2. lfthis 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 (ifknown)
3. Specify the type of project (check one):
Low Density X High Density Redevelop General Permit Other
4. Additional Project Requirements (clfeck applicable blanks):
CAMA Major X Sedimentation/Erosion Control X 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 by the use of -an underground infiltration system.
2. Stormwater runoff fi-om this project drains to the Cape Dear River Basin.
3. Total Project Area: 2.35 acres.
4. Project I3uilt Upon Area: 48.1 %.
5. How many drainage areas does the project have? 1
6. Complete the following information for each drainage area. Ifthere are more than two drainage areas in the
project, attach and additional sheet with the information for each area provided in the same format as below.
Basin Information
Drainage Area I
Drainage Area 2
Receiving Stream Name
Silver Stream Branch
Receiving Stream Class
C ; Sw
Drainage Area
61,663 sf— 1.41 acres
Existing Im )ervioLls*Area
proposed Impervious* Area
49,295 sf— 1.13 acres
% Int pervious* Area Total
79.9%
Im )CrVlOnS* Surface Area
Drainage Area I
Drainage Area 2
On -Site Buildings
11,963 sf
On -Site Streets
On -Site Parkin r/Pavement
32,561 sl'
On -Site Sidewalks
4,771 sf
Other On -Site future
Off -Site
Total:
49,295 sf--- 1.13 acres
*Impervious area is defined as the huill upon area including, but not limited to, buildhigs, roads, parking areas, sidewellks,
gravel areas, etc.
Dorm SWU-101 Version 3,99 Page 2 of

*Impervious area is defined as the buill upon area including, but not limited to, buildings, roads, parking areas,
si(leu,alks, gravel areas, etc.
1-low was the off -site impervious area listed above derived?
IV. DEED RESTRICTIONS AND PROTECTIVE COVENANTS
The following italicized deed restrictions and protective covenants are required to be recorded for all
subdivisions, out parcels, and future 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 follmi,ing covenants are intended to ensure ongoing contplianc•e with skate slvrnnvcller management
per)ml number as lssiled by the Division of Water Quality. Viese covenants may not
be changed or deleted without the consent of the State.
No more than .square feet of any lot shrill be covered by structures or iml)ery ous materials.
ImI)en,ious materials include asl)hall, gravel, concrete, brick, stone, slate or similar material but not include
wood decking or the ►vcaer surface of s►vmmmnrg pools.
SuVales shall not be fillecl in, piped, or altered excel)l as necessary to provide driveii, ay crossings.
4. Built -upon area n7 excess of the per)mlled amount requires a state storm water management per mil
modification prior to construction.
All permitted runoff fromt the outparce'ls or future development shall be chre'cled into the permitted
storrmYater control System. Tl7ese coltrle'ctlons to llle sto)'nln�crlei- co)ltl•ol Sjrslei;t shrill be per fol'nied 1r7 a
manner that maintaills the mNegraly and pe'ifor7mance of the systemt as permilled.
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 stornnvater 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 Rivcr 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.
Please indicate that you have provided the following required information by initialing in the space provided
next to each item.
Init•als
• Original and one copy of the Slormwater Management Permit Application Form
• One copy of the applicable Supplement Fonn(s) for each BMP A4AqA
• Permit application processing fee of $4000 (payable to NCDENIZ) A foil
• Detailed narrative description of stormwater treatment/managemcnt
• Two copies of plans and specifications, Including: MA7
- Development/ Project name
- Engineer and firm
- Legend
- North arrow
- Scale
- Revision number & date
- Mean high water line
- Dimensioned property/project boundary
- Location map with named streets or NCSR numbers
- Original contours, proposed contours, spot elevations, finished Moor 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
f 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): Crane White, LLC
Mailing Address: 100 Edgewater Lane
City Wilmington State: NC
Plione: [phone]
VIII. APPLICANT'S CERTIFICATION
Zip: 28403
Fax: [phone]
I, (In ijrl or lvpe iiame of1mrs i listed hi General It formaliou. Item 2) Laura J. Crane
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 2Fl.1000.
Signature: � � Date: �� l C)
Form SWU-10l Version 3.99 Page 4 of

Permit No. StJ� 9. Ckg[nQ!.
(to be provided by DWQ)
State of'North Carolina
Department of Environment and Natural ReSOL11-CeS
Division of Water Quality
STORMWATER MANAGEMENT PERM ITAPPLICATION FORM
UNDERGROUND 1NFILTRA`I"ION TRI]NCI-1 SUPPLEMENT
7his form may be pholo copied fbr 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: Wisteria Medical Center
Contact Person: Mark FlargrQyc Phone Number: 910 256-9277
For projects with multiple infiltration systems, a supplement form must be completed for each system. This
worksheet applies to: Trench _ 1 in Drainage Area
(from plans) (from Form SWU-101)
11. DESIGN INFORMATION (attach supporting calculations/documentation):
Soils Report Summary (based rrpon an aclual field investigation and soil borings)
Soil Type Ke, Ly
Infiltration Rate '� 7 in/h or cf/hr/sf (cirele appropriate units)
SH WT Elevation fmsl (Seasonal High Water Table elevation)
Trench Design Parameters
Design Volume 3.952 c.f-.
Design Storm I.0 inch event (1.5-inch vent far SA waters, I inch for others)
Drawdown Time 0.66 hours
Per Pipe Sire 24 inch diameter
Perforated Pipe Length 792 ft.
No. Observation Wells NIA (may be required on a case -by -case basis)
Stone Type (if used) #57 Washcd Stone
Stone Void Ratio 40'%
Trench Elevations (ire feet paean sea level)
Bottom Elevation I?_00 find
Storage/Overflow Elevation 14.19 find
FormSWU-107 R60.99 Page I ol'4

Trench Dimensions
I-leight 2.80
11.
Length 70
ft.
Width 45.5
fl.
Volume Provided _ _ 3 952__
cu. ft.
I11. REQUIRED ITEMS CHECKLIST
The following checklist outlines design requirements per the Stormwater Best Management Practices manual
(N.C. Department of' Environment, 1-Icalth and Natural Resources, November 1995) and Administrative Code
Section: 15 A NCAC 21-1.1008.
Initial in the space provided to indicate that 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 Norm, the agent may initial below. Attach justification if a requirement has not been met.
Applicants Initials
nu+ a System is located 50 feet from class SA waters and 30 feet from other surface waters.
WL b. System is located at least 100 feet from water supply wells.
"NO c. Bottom of�system is at least 2 feet above the seasonal high water table.
MIA' d. Bottom of the system is 3 feet above any bedrock or Impervious soil horizon.
tlPA- e. Off' -fine system, runoff in excess of the design volume bypasses the system (bypass detail provided)
Ml* 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
hydrogcologic evaluation may be required).
mAL— g. Soils have a minimum hydraulic conductivity of 0.52 inches per hour.
A!Lk- h. System is not sited on or In fill material or DWQ approval has been obtained.
MA 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.
0011 j. System is sized to take into account the runoff at the ultimate built-orlt potential from all surfaces
draining to the system, including any off -site drainage.
k. System is located in a recorded drainage easement for the puI-poses of operation and maintenance
and has recorded access casements to the nearest public right-of-way.
MOO- I . System captures and infiltrates the runoff from the first 1.0 inch ol-rainfall (1.5 inch event for areas
draining to SA waters ).
m� m. Drainage area for the device is less than 5 acres.
n. A pretreatment device (filter strip, grassed Swale, sediment trap, ctc.) is provided.
MIA o. "french bottom is covered with a layer of clean sand to an average depth of 4 inches.
FormSWU-107 R60.99 Page 2 of

�{•� r.
�� .' �

dt�_ P. Sides ol'the inliltration trench are lined with gcotextile fabric.
AA&—_ q. Rock used is free of fines (washed stone) and has a large void ratio.
r. Side to bottom area ratio is less than 4: 1.
s. Observation well(s) are provided (case -by -case basis).
t. Vegetated filter is provided for overflow (50 fleet for SA waters. 30 feet for other waters) and detail
is shown Oil plans.
1-01V-1U. A benchmark for checking sediment accumulation is provided.
IV. UNDERGROUND INI'l LTRATIONTRENCH 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 systern 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 pCrlormance.
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 l foot ofthe bottom ofthe system for a period of three
months) sliall be reported to DWQ irluncdiately.
if DWQ determines that the systcnl is failing, the system will immediately be repaired or replaced to
original design spec) f ucations. I f the system cannot be repaired to perform its design function, other
stornlwatcr control devices as allowed by NCAC 21-1.1000 must be designed, approved and constructed.
Remove accumulated sediment from the infiltration system annually or when depth in [lie unit is reduced
to 75%ofthe 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 systcnl 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 (Le,
stockpiling near a stormwater treatment device or stream, etc.).
A benchmark shall be established in the infiltration systcnl. 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 acCunlLrlated sediments.
The outlet structure has a sump that sits one foot below the infiltration system. When the depth of
the structure reaches 0.90 feet the accumulated sediment shall be removed from the system.
FormSWU-107 R60.99 Page 3 of

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. 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: Lauraa I. Crane. Managing Member _
Address: 100 Ldgewater Lane, Wilmington, NC 28403
Phone: t20 7L 0?-772$ Date:
Signature:
Note: The legally resj)o"srble pal'ty should not be CI homeowners association unless more than 50% of the lots
have been sold and a residers of the subdivision has been (tamed the president.
L LQ - , a Notary Public for the State of N�c 4\ NMii County of
�Weo �y-,.rp.ter- , do hereby certify that Lxm-'C, --'� • CMy-\e- personally appeared
before me this ` day of and acknowledge the due execution of the forgoing infiltration
basin maintenance requirements. Witness my hand and official seal,
O
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' M commission expires
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