SW8011005_Current Permit_20240516

ROY COOPERGovernor
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ELLZABCTH S.BISER `"
Sealetary
WIL1IAlM1 TOBYE. VINSON,JR NORTH CAROLINA
En
May 1.0,2024
New Hanover County
Attn: Chris Coudriet,County Manager
200 Division Drive
Wilmington,NC 28401
Subject: Permit Renewal
Post-Construction Stormwater Management Permit No.SW8011005
Federal Point Fire Station
New Hanover County
Dear Mr.Coudriet
The Division of Energy,Mineral and Land Resources received a complete 8-year Permit Renewal Application for
the subject permit on May 1's,2024. The Division is hereby notifying you that permit SW8011005 has been
renewed,updated,and re-issued on May 16th,2024,as attached. As requested,a copy of the current operation and
maintenance agreement is also enclosed.Please be aware that the renewal and re-issuance of this stormwater
permit does not imply that the site is currently in compliance.
This permit shall be effective until March 19th,2032,and does not supersede any other agency permit that may
be required. The project shall be subject to the conditions and limitations as specified therein. This permit does
not impose new or increased stormwater control requirements; it clarifies the rules and requirements of this
program.to provide you with a better understanding of your obligations under this permit. Failure to comply with
these requirements will result in future compliance problems. Please note that this permit is not transferable
except after notice to and approval by the Division.
If any parts,requirements,or limitations contained in this permit are unacceptable,you have the right to request
an adjudicatory hearing by filing a written petition with the Office of Administrative Hearings(OAH). The
written petition must conform to Chapter 150B of the North Carolina General Statutes and must be filed with the
OAH within thirty(30)days of receipt of this permit. You should contact the OAH with all questions regarding
the filing fee(if a filing fee is required)and/or the details of the filing process at 6714 Mail Service Center,
Raleigh,NC 27699-6714,or via telephone at 919-431-3000,or visit their website at www.NCOAH.com.Unless
such demands are made this permit shall be final and binding.
If you have any questions concerning this permit,please contact Logan Inman in the Wilmington Regional Office,
at(910)796-7215 or [e-mail].
Sincerely,
azix. ,1!
r
64
William E.Toby Vinso Jr.,PE,CPM,Interim Director
Division of Energy,Mineral and Land Resources
Enclosures: Attachment A—Designer's Certification Form
Attachment C—Permitting History
copy of the Renewal Application Documents
Copy of the current operation and maintenance agreement
DES/iwi: \\\Stormwater\Permits&Projects12001\011005 HD12024 05 permit 011005
cc: Wilmington Regional Office Stormwater File
34 North Carolina:Department of Envaoe entaf Quality. k Division of:Energy Mineral and Land Resources
Wilmington Regional Office 1127 Candinat Drive Extension 1 wtrmtngton North Carolina2&4O8
e.re�.wa®murr � 910_7%2215.

State Stormwater Management Systems
Permit No. SW8 011005
STATE OF NORTH CAROLINA
DEPARTMENT OF ENVIRONMENTAL QUALITY
DIVISION OF ENERGY, MINERAL AND LAND RESOURCES
POST-CONSTRUCTION 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
New Hanover County
Federal Point Fire Station
9815 River Road, Wilmington, New Hanover County
FOR THE
construction, operation, and maintenance of a wet detention pond in compliance with the provisions of 15A
NCAC 2H .1000 (hereafter referred to as the "stormwater rules') and as outlined in the application, approved
stormwater management plans, supplement, calculations, operation and maintenance agreement, recorded
documents, specifications, and other supporting data (the "approved plans and specifications") as attached
and/or on file with and approved by the Division of Energy, Mineral and Land Resources (the "Division" or
"DEMLR"). The project shall be constructed, operated, and maintained in accordance with these approved plans
and specifications. The approved plans and specifications are incorporated by reference and are enforceable
part of this permit.
This permit shall be effective from the date of issuance until March 19th, 2032, and shall be subject to the following
specified conditions and limitations. The permit issued shall continue in force and effect until the permittee files
a request with the Division for a permit modification, transfer, renewal, or rescission; however, these actions do
not stay any condition. The issuance of this permit does not prohibit the Director from reopening and modifying
the permit, revoking, and reissuing the permit, or terminating the permit for cause as allowed by the laws, rules,
and regulations contained in Title 15A NCAC 2H.1000 and NCGS 143-215.1 et.al:
I. DESIGN STANDARDS
1. This permit is effective only with respect to the nature and volume of stormwater described in the
application and other supporting data.
2. This stormwater system has been approved for the management of stormwater runoff as described in
Section 1.6 of this permit and per the approved plans. The stormwater control has been designed to
handle the runoff from a maximum built-upon area of 38,061 square feet of impervious area.
3. The tract will be limited to the amount of built-upon area indicated in Section 1.6 of this permit, and per
approved plans.
4. All stormwater collection and treatment systems must be located within the property boundaries, on
property owned by the permittee.
Page 1 of 4

State Stormwater Management Systems
Permit No. SW8 011005
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.
6. The following design criteria have been provided in the wet detention pond and must be maintained at
design condition:
a. Drainage Area, acres: 1.82
Onsite, ft2: 79,279
Offsite, ft2: 0
b. Total impervious Surfaces, ft2: 38,061
c. Design Storm, inches: 1"
d. Pond Design Depth, feet: 4
e. TSS removal efficiency: 90%
f. Permanent Pool Elevation, FMSL: 17
g. Permanent Pool Surface Area, ft2: 3,571
h. Permitted Storage Volume, ft3: 4,001 at temporary pool elev.
Temporary Storage Elevation, FMSL: 18
j. Controlling Orifice: 1"0 pipe
k. Fountain Horsepower, HP N/A
Receiving Stream/River Basin: Telfairs Creek/Cape Fear
m. Stream Index Number: 18-87-31.5-1
n. Classification of Water Body: "SC; 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 the design condition. The approved Operation and Maintenance Plan
must be followed in its entirety and maintenance must occur at the scheduled intervals including, but not
limited to:
a. Semiannual scheduled inspections (every 6 months).
b. Sediment removal.
c. Mowing and revegetation of side slopes and vegetated filter.
d. Immediate repair of eroded areas.
e. Maintenance of side 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 DEMLR. 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 until calculations are
provided documenting the permeant pool volume is greater than 30,000 cubic feet.
6. The facilities shall be constructed, operated, and maintained in accordance with the provisions of this
permit, the approved plans and specifications, and the supporting documents attached to this permit and
on file with the Division.
Page 2 of 4

State Stomiwater Management Systems
Permit No. SW8 011005
7. Upon completion of construction, prior to issuance of a Certificate of Occupancy, and prior to operation
of this permitted facility, the permittee shall cause a certification from an appropriate designer for the
system installed to be submitted, certifying that the permitted facility has been installed in accordance
with this permit, the approved plans and specifications, and other supporting documentation. Any
deviations from the approved plans and specifications must be noted on the Certification. A modification
may be required for those deviations.
8. The stormwater system must be restored to design condition upon a transfer of ownership; occupancy of
the facility; or operation as a stormwater treatment device, if it is used as an Erosion Control device.
9. No person or entity, including the permittee, shall alter any component shown in the approved plans
and specifications. Prior to the construction of any modification to the approved plans, the permittee
shall submit to the Director, and shall have received approval for modified plans, specifications, and
calculations including, but not limited to, those listed below. For changes to the project or SCM that
impact the certifications, a new or updated certification(s), as applicable, will be required and a copy
must be submitted to the appropriate DEQ regional office upon completion of the modification.
a. Any modification to the approved plans and specifications, regardless of size including the SCM(s),
BUA, details, etc.
b. Redesign or addition to the approved amount of BUA or to the drainage area.
c. Further development, subdivision, acquisition, lease or sale of any, all or part of the project and/or
property area as reported in the approved plans and specifications.
d. Altering, modifying, removing, relocating, redirecting, regrading, or resizing of any component of the
approved SCM(s), the stormwater collection system and/or vegetative conveyance shown on the
approved plan.
e. The construction of any allocated future BUA.
f. The construction of any permeable pavement, #57 stone area, public trails, or landscaping material
to be considered a permeable surface that were not included in the approved plans and
specifications.
g. Other modifications as determined by the Director.
10. The permittee is responsible for verifying that the proposed built-upon area does not exceed the allowable
built-upon area.
III. GENERAL CONDITIONS
1. CORRECTIVE ACTIONS REQUIRED. If the facilities fail to perform satisfactorily, the permittee shall
take immediate corrective actions. This includes actions required by this Division and the stormwater
rules such as the construction of additional or replacement on-site stormwater systems. These
additional or replacement measures shall receive a permit from the Division prior to construction.
2. PERMIT RENEWAL. A permit renewal request must be submitted at least 180 days prior to the
expiration date of this permit. The renewal request must include the appropriate application,
documentation and the processing fee as outlined in Title 15A NCAC 02H.1045(3).
3. CHANGES TO THE PROJECT NAME, PERMITTEE NAME OR CONTACT INFORMATION. The
permittee shall submit a completed Permit Information Update Application Form to the Division within
30 days to making any one of these changes.
4. TRANSFER. This permit is not transferable to any person or entity except after notice to and approval
by the Director. Neither the sale of the project and/or property, in whole or in part, nor the conveyance
of common area to a third party constitutes an approved transfer of the permit.
a. TRANSFER REQUEST. The transfer request must include the appropriate application,
documentation and the processing fee as outlined in 15A NCAC 02H.1045(2). This request must
be submitted within 90 days of the permit holder meeting one or more of the following:
i. A natural person who is deceased;
ii. A partnership, limited liability corporation, corporation, or any other business association that
has been dissolved;
iii. A person or entity who has been lawfully and finally divested of title to the property on which
the permitted activity is occurring or will occur through foreclosure, bankruptcy, or other legal
proceeding.
iv. A person or entity who has sold the property, in whole or in part, on which the permitted
activity is occurring or will occur.
Page 3 of 4

State Stormwater Management Systems
Permit No. SW8 011005
v. The assignment of declarant rights to another individual or entity;
vi. The sale or conveyance of the common areas to a Homeowner's or Property Owner's
Association, subject to the requirements of NCGS 143-214.7(c2);
b. TRANSFER INSPECTION. Prior to transfer of the permit, a file review and site inspection will be
conducted by Division personnel to ensure the permit conditions have been met and that the project
and the on-site stormwater system complies with the permit conditions. Records of maintenance
activities performed to date may be requested. Projects not in compliance with the permit will not be
transferred until all permit and/or general statute conditions are met.
5. COMPLIANCE. The permittee is responsible for compliance with the terms and conditions of this
permit until the Division approves the transfer request.
a. APPROVED PLANS AND SPECIFICATIONS. A copy of this permit, approved plans, application,
supplement, operation and maintenance agreement, all applicable recorded documents, and
specifications shall be maintained on file by the permittee at all times.
b. DIVISION ACCESS. The permittee grants Division Staff permission to enter the property during
normal business hours to inspect all components of the permitted project.
c. ENFORCEMENT. Any individual or entity found to be in noncompliance with the provisions of a
stormwater management permit or the requirements of the stormwater rules is subject to
enforcement procedures as set forth in NCGS 143 Article 21.
d. ANNUAL CERTIFICATION. The permittee shall electronically submit to the Division an annual
certification completed by either the permittee or their designee confirming the project's
conformance with permit conditions.
e. OBTAINING COMPLIANCE. 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 modified plans and certification
in writing to the Director that the changes have been made.
f. OTHER PERMITS. The issuance of this permit does not preclude the permittee from complying
with and obtaining any other permits or approvals that are required for this development to take
place, as required by any statutes, rules, regulations, or ordinances, which may be imposed by any
other Local, State or Federal government agency having jurisdiction. Any activities undertaken at
this site that cause a water quality violation or undertaken prior to receipt of the necessary permits
or approvals to do so are considered violations of NCGS 143-215.1, and subject to enforcement
procedures pursuant to NCGS 143-215.6.
Permit modified, updated, and reissued this the 16th day of May 2024.
NORTH CAROLINA ENVIRONMENTAL MANAGEMENT COMMISSION
W.0
William E. Toby Vinson, Jr., PE, CPM, Interim Director
Division of Energy, Mineral and Land Resources
By Authority of the Environmental Management Commission
Page 4 of 4

State Stormwater Management Systems
Permit No. SW8 011005
Stormwater Permit No. SW8 011005
Federal Point Fire Station
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,
(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 specifications:
SEAL
Signature
Registration Number
Date
Page 1 of 2

State Stormwater Management Systems
Permit No. SW8 011005
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 outlet 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 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 and located 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.
16. All components of the stormwater BMP are located in either recorded common areas,
or recorded easements.
cc: NCDEQ-DEMLR Regional Office
Page 2 of 2

Attachment C- Permitting History
Federal Point Fire Station
Permit No.SW8011005
Apprcral BIMS !�
!Pale Permit Action Version I Description of the Changes
I construction, operation and maintenance of a wet
detention pond in compliance with the provisions of
3/19/2002 Original 1 0 15A NCAC 2H .1000. The stormwater control has
Approval been designed to handle the runoff from 38,061
square feet of impervious area. This pond must be
operated with a vegetated filter
12/21/2016 Renewal 2.0 Expired 3/19/24
5/16/2024 Renewal 3.0 expires 3/19/2032
Page 1 of 1

UbMLI(USt ONLY
Date R ceive Fee Paid Permit Number
:1 �o�ay troosimiloo 7,51) San' O 11065
NC DEQ Division of Energy, Mineral and Land Resources
STATE STORMWATER:
PERMIT RENEWAL APPLICATION FORM
In accordance with 15A NCAC 2H.1045(3), the current permit holder shall renew their high density permit 180 days
prior to its expiration. Renewed permits are valid for a period of 8 years per Session Law 2011-398(SB 781)
Section 60.(c). This application form is for permit renewals only.
A. PROJECT INFORMATION
1. State Stormwater Permit Number: SW8011005
2. Project name: Federal Point Fire Station
3. Project street address: 9815 River Road
City: Wilmington County: New Hanover
ZIP : 28412
4. What, if any, changes have been made to the project as permitted? No changes have been made
If the project has changed from the original approved plans,please complete SWU-101 for a Major
Modification or Minor Modification Application form available at:https://deg.nc.aov/about/divisions/enerav-
mineral-land-resources/energv-mineral-land-rules/stormwater-program/post-construction.
B. PERMITTEE INFORMATION
If changes to the permittee or project name have been made,please complete either the Permit Update form
or the Permit Transfer form available at https://deq.nc.gov/about/divisions/energv-mineral-land-
resources/energv-mineral-land-rules/stormwater-program/post-construction. State Stormwater Permits do not
automatically transfer with the sale of the property.
1. Current Permit Holder's Company Name/Organization: New Hanover County
2. Signing Official's Name: Kevin Caison
3. Signing Official's Title: Facilities Project Manager
4. Mailing Address: 200 Division Drive
City: Wilmington State: NC ZIP :
28401
5. Street Address:
City: State: ZIP :
6. Phone: [phone] Email: kcaisonanhcoov.com
Fr"2-7 CEWE
I{ MAR 2 0 2024
BY:
Stormwater Permit Renewal Form Page 1 of 3 May 11,2018

C. SUBMITTAL REQUIREMENTS
Submit the application package to the appropriate DEMLR Regional Office (Coastal, SA Waters)or DEMLR
Central Office (Urbanizing Areas Ph 2, USMP, Non-Coastal HQW/ORW). Only applications packages that
include all required items listed below will be accepted and reviewed.
Initial each item below to indicate that the required information is provided in the application package:
1. A permit application processing fee of$505.00 payable to NCDEQ.
2. One original signed hard copy and one electronic copy of this completed form. The signing official
named on this application to represent the current permittee must meet one of the following:
a. Corporation—a principle executive officer of at least the level of vice-president;
b. Limited Liability Company(LLC)—a manager or company official as those terms are defined
in G.S. 57D"North Carolina Limited Liability Company Act;"
c. Public Entity—a principal executive officer, ranking official, or other duly authorized employee;
d. Partnership or limited partnership—the general partner;
e. Sole proprietor; or
f. Letter of authorization signed by one of the signatories noted in a—e above authorizing the
signature of another entity.
N/A 3. One hard copy and one electronic copy of recorded documents required by the original permit that have
not yet been received by DEMLR, including: deed restrictions, protective covenants,
condominium/planned community declaration and easements. If the project has been built, include
documentation that the maximum BUA per lot or maximum total BUA has not been exceeded. If
the project has not been built, include a signed agreement that the final recorded deed restrictions
and protective covenants will be submitted at a later date.
4. O&M Agreements, Please select one:
❑ I have a copy of the current recorded O&M Agreement for all SCMs, and I will continue to
keep this on file with the permit; or
Z I do not have a copy of the current recorded O&M Agreement for all SCMs and am
requesting a copy be sent to me. I agree to keep this on file with the permit.
ace 5. Designer Certifications, Please select one:
❑ A copy of the certification(s)confirming that the project was built in accordance with the
approved plans have been previously provided to the Division;or
® A copy of the certification(s)confirming that the project was built in accordance with the
approved plans are enclosed; or
❑ The project has not yet been built.
N/A 6. [IF APPLICABLE] If the project has been built, one original hard copy and one electronic copy of a
signed, sealed, and dated letter from a licensed professional stating that the SCMs have been
inspected, and that they have been built and maintained in accordance with the permit.
N/A 7. [IF APPLICABLE]When the permittee is a corporation or a limited liability corporation (LLC): Provide
one hard copy and one electronic copy of documentation from the NC Secretary of State, or other
official documentation, which supports the titles and positions held by the persons listed in Section
C.2 per 15A NCAC 2H. 1043(3)(b).
httos://www.sosnc.gov/online services/search/by title/ Business Registration
MAR 2 0 2024
BY:
Stormwater Permit Renewal Application Form Page 2 of 3 May 11,2018

D. � .`
PERMITTEE''S_,CERTIFICATION
I, iivito D:d , the person legally responsible for the permit, certify that I have
a copy of the Permit and O&M Agreement on site(or I will obtain a copy and it will be kept on site), that I am
responsible for the performance of the maintenance procedures, and the site has been and will be maintained
according to the O&M Agreement and approved plans. I agree to notify DEMLR of any problems with the SCMs
or built-upon area and to submit the proper forms to modify or transfer the permit prior to any changes to the
project, SCMs, or ownership. All information provided on this permit renewal application is, to the best of my
knowledge, correct and complete.Signature: Date: o749/2O 'l
NOTARIZATION: *-�
I, L. P0.�I Pr ibl C� (. , a Notary Public for the State of
fie'o f'-t- 1 Cato l,Lich , County of Qends t , do hereby certify
that Key;n Ca so personally appeared before me
this the .Zq±h day of Ftbrckary , 20 ?y , and acknowledge the due
et yhon of the forgoing instrument. Witness my hand and official seal,
INCE /,i,
EA.
(Notary S al)
.4) 2=
i •S Nta'' Sigetie:C7s . .
'iN�r , ion expires 0 3 f O V?O 26
ECEIVE
MAR 2 0 2024
BY:
Stormwater Permit Renewal Application Form Page 3 of 3 May 11,2018

Permit No. 5tO O I IW 5
(to be provided by DWQ)
State of North Carolina
Department of Environment and Natural Resources
Division of Water Quality
STORMWATER MANAGEMENT PERMIT APPLICATION FORM
WET DETENTION BASIN SUPPLEMENT
This form may be photocopied for use as an original
DWQ Stormwater Management Plan Review:
A complete stormwater management plan submittal includes an application form,a wet detention basin supplement for
each basin, design calculations, and plans and specifications showing all basin and outlet structure details.
1. PROJECT INFORMATION
Project Name: Federal Point Fire Station
Contact Person: Mark Hargrove Phone Number: [phone]
For projects with multiple basins, specify which basin this worksheet applies to:
elevations
Basin Bottom Elevation 13.0 ft. (floor of the basin)
Permanent Pool Elevation 17.0 ft. (elevation of the orifice)
Temporary Pool Elevation 18.0 ft. (elevation of the discharge structure overflow)
areas
Permanent Pool Surface Area 3,571 sq. ft. (water surface area at the orifice elevation)
Drainage Area 1.82 ac. (on-site and off-site drainage to the basin)
Impervious Area 0.87 ac. (on-site and off-site drainage to the basin)
volumes
Permanent Pool Volume 4,593 cu. ft. (combined volume of main basin and forebay)
Temporary Pool Volume 4,001 cu. ft. (volume detained above the permanent pool)
Forebay Volume 851 cu. ft. (approximately 20%of total volume)
other parameters
SA/DA1 4.14 (surface area to drainage area ratio from, DWQ table)
Diameter of Orifice 1.0 in. (2 to 5 day temporary pool draw-down required)
Design Rainfall 1 in.
Design TSS Removal2 90 % (minimum 85%required)
Footnotes:
1 When using the Division SAIDA tables, the correct SAIDA ratio for permanent pool sizing should be computed based
upon the actual impervious % and permanent pool depth. Linear interpolation should be employed to determine the
correct value for nonstandard table entries.
2 In the 20 coastal counties, the requirement for a vegetative filter may be waived if the wet detention basin is designed to
provide 90% TSS removal. The NCDENR BMP manual provides design tables for both 85% TSS removal and 90%
TSS removal.
Form SWL'-102 Rev 3.99 Page 1 of 4

II. REQUIRED ITEMS CHECKLIST
The following checklist outlines design requirements per the Stormwater Best Management Practices Manual (N.C.
Department of Environment, Health and Natural Resources, February 1999) and Administrative Code Section: 15 A
NCAC 2H. 1008.
Initial in the space provided to indicate the following design requirements have been met and supporting documentation is
attached.If the applicant has designated an agent in the Stormwater Management Permit Application Form,the agent may
initial below.If a requirement has not been met,attach justification.
Applicants Initials
a. The permanent pool depth is between 3 and 6 feet(required minimum of 3 feet).
AJA1l/ b. The forebay volume is approximately equal to 20%of the basin volume.
/3J,A9i� c. The temporary pool controls runoff from the design storm event.
$1/i'A d. The temporary pool draws down in 2 to 5 days.
A1Ji e. If required, a 30-foot vegetative filter is provided at the outlet(include non-erosive flow calculations)
0?1N1 f. The basin length to width ratio is greater than 3: 1.
AMY g. The basin side slopes above the permanent pool are no steeper than 3: 1.
"MO h. A submerged and vegetated perimeter shelf with a slope of 6:i or less(show detail).
i. Vegetative cover above the permanent pool elevation is specified.
t11/1# j. A trash rack or similar device is provided for both the overflow and orifice.
fvJf} k. A recorded drainage easement is provided for each basin including access to nearest right-of-way.
�y111711t 1. If the basin is used for sediment and erosion control during construction, clean out of the basin is
specified prior to use as a wet detention basin.
,4'A18 m. A mechanism is specified which will drain the basin for maintenance or an emergency.
Pod 6..;, / be-p tv. ed clOLO I -For »ta;kieiia.ne.e._ c .' 6.14 eLMerfency.
III.WET DETENTION BASIN OPERATION AND MAINTENANCE AGREEMENT
The wet detention basin system is defined as the wet detention basin, pretreatment including forebays and the vegetated
filter if one is provided.
This system(check one) 0 does 0 does not incorporate a vegetated filter at the outlet.
This system(check one) 0 does 0 does not incorporate pretreatment other than a forebay.
Form SWU-102 Rev 3.99 Page 2 of 4

Maintenance activities shall be performed as follows:
1. After every significant runoff producing rainfall event and at least monthly:
a. Inspect the wet detention basin system for sediment accumulation, erosion, trash accumulation, vegetated
cover, and general condition.
b. Check and clear the orifice of any obstructions such that drawdown of the temporary pool occurs within 2
to 5 days as designed.
2. Repair eroded areas immediately, re-seed as necessary to maintain good vegetative cover, mow vegetative cover
to maintain a maximum height of six inches, and remove trash as needed.
3. Inspect and repair the collection system(i.e. catch basins,piping, swales,riprap, etc.) quarterly to maintain proper
functioning.
4. Remove accumulated sediment from the wet detention basin system semi-annually or when depth is reduced to
75% of the original design depth (see diagram below). Removed sediment shall be disposed of in an appropriate
manner and shall be handled in a manner that will not adversely impact water quality (i.e. stockpiling near a wet
detention basin or stream, etc.).
The measuring device used to determine the sediment elevation shall be such that it will give an accurate depth
reading and not readily penetrate into accumulated sediments.
When the permanent pool depth reads 3' feet in the main pond,the sediment shall be removed.
When the permanent pool depth reads 1.5' feet in the torebay,the sediment shall be removed.
BASIN DIAGRAM
(fill in the blanks)
0 Permanent Pool Elevation_ 17.0
Sediment oval El. 15.5 2 75
Sediment Removal Elevation_ 14.0 75%Bottom Ele ation 15.0 t gn 13.0
Bottom Elevation_ 25%
FOREBAY MAIN POND'
5. Remove cattails and other indigenous wetland plants when they cover 50% of the basin surface. These
plants shall be encouraged to grow along the vegetated shelf and forebay berm.
6. If the basin must be drained for an emergency or to perform maintenance, the flushing of sediment
through the emergency drain shall be minimized to the maximum extent practical.
7. All components of the wet detention basin system shall he maintained in good working order.
Form SWU-102 Rev 3.99 Page 3 of 4

I acknowledge ,and agree by my signature below that I am responsible for the performance of the seven
maintenance procedures listed above. I agree to notify DWQ of any problems with the system or prior to any
changes to the system or responsible party.
t
Print name: _ \egorir;Thompson
Title: Chief Proj t Engineer
Address: 414 Chestnut Street, Wilmington,NC 28401
Phone: [phone]
Date: hip)I J / c,2 00/
Signature: ri‘/ !c-''
Note: The legally responsible party should not be a homeowners association unless more than 50% of the lots
have been sold and a resident of the subdivision has been named the president.
I, Nancy , -OtJ/ep a Notary Public for the State of /(1o02. 1 G' pi_ n/Ai-
County of Mal Nano✓ems/ do hereby certify that 6 rc d 7h s
personally appeared before me this /c day of he/urn , o2OO/ and acknowledge the due
execution of the forgoing wet detention basin maintenance requirements. Witness my hand and official seal,
4�G4 R. Fps`
NOTARI�
Iy(VER CO'
SEAL
My commission expires O j/0(4 U9-
Form SWU-102 Rev 3.99 Page 4 of 4