SW8071026_CURRENT PERMIT_20230124

STORMWATER DIVISION CODING SHEET
POST -CONSTRUCTION PERMITS
PERMIT NO.
SW8 0­1 �01ID
DOC TYPE
x❑ CURRENT PERMIT
❑ APPROVED PLANS
❑ HISTORICAL FILE
❑ COMPLIANCE EVALUATION INSPECTION
DOC DATE
2o2.3 o k 2y
YYYYMMDD

ROY COOPER
Governor
ELIZABETH S. BISER
secretary
DOUGLAS R. ANSEL
Interim Dlreaor
January 24th, 2023
New Hanover County
Attn: Kevin Caison, Manager
200 Division Drive
Wilmington, NC 28401
NORTH CAROLINA
Environmental. Quality
Subject: Permit Renewal
Post -Construction Stormwater Management Permit No. SW8071026
New Hanover County Murrayville Fire Station
New Hanover County
Dear Mr. Caison:
Effective August 1, 2013 the Post -Construction Stormwater Management Program has been transferred from the
Division of Water Quality ("DWQ") to the Division of Energy, Mineral and Land Resources ("DEMLR"). All
previous references to DWQ will remain in older permits issued prior to August 1, 2013 until they are modified.
Please note that this permit will now reference DEMLR as the Division responsible for enforcement of the permit.
On August 5, 2009, the Governor signed Session Law 2009-406. This law impacted any development approval
issued by the former Division of Water Quality under Article 21 of Chapter 143 of the General Statutes, which
was current and valid at any point between January 1, 2008, and December 31, 2010. The law extended the
effective period of any permit that was set to expire during this time frame to three (3) years from its current
expiration date. On August 2, 2010, the Governor signed Session Law 2010-177, which granted an extra year for
a total of four (4) years extension.
The Division of Energy, Mineral and Land Resources received a complete 8-year Permit Renewal Application for
the subject permit on January 20', 2023. The Division is hereby notifying you that permit SW8071026 has been
renewed, updated, and re -issued on January 241, 2023, 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 December 30", 2029, which includes all available extensions, 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.NCOAI-I.com. Unless
such demands are made this permit shall be final and binding.
If you have any questions concerning this permit, please contact Aisia Freeman in the Wilmington Regional
Office, at phone # [phone] or [e-mail].
Sincerely,
. Douglas R. Ansel, Interim Director
Division of Energy, Mineral and Land Resources
ZNorth Carolina Department of Environmental Quality I Division of Energy, Mineral and Land Resources
Wilmington Regional Office 1 127 Cardinal Drive Extension I Wilmington, North Carolina 23405
awmwimu.w�wom+� /� 910.796.7215

State Stormwater Permit No. SW8 080401
Page 2 of 2
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/af: \\\Stormwater\Permits & Projects\2007\071026 HD\2023 01 permit 071026
cc: Wilmington Regional Office Stormwater File
, North Carolina Department of Environmental Quality I Division of Energy, Mineral and Land Resources
Wilmington Regional Office 1 127 Cardinal Drive Extension I Wilmington, North Carolina 28405
nonm cwauxn
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Post Construction Stormwater Management
Permit No. SW8071026
STATE OF NORTH CAROLINA
DEPARTMENT OF ENVIRONMENT AND NATURAL RESOURCES
DIVISION OF WATER QUALITY
POST- CONSTRUCTION STORMWATER MANAGEMENT PERMIT
HIGH DENSITY COMMERCIAL 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
Bruce Shell and New Hanover County Fire Department
New Hanover County Murrayville Fire Station
Murrayville Road, Wilmington, New Hanover County
FOR THE
construction, operation and maintenance of a wet detention pond(s) in compliance with the provisions of 15A
NCAC 2H .1000 (hereafter referred to as the "stormwater rules') 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 December 3011, 2029 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
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 51,141 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.
Page 1 of 5

Post Construction Stormwater Management
Permit No. SW8071026
All stormwater collection and treatment systems must be located in either dedicated common areas or
recorded easements. The final plats for the project will be recorded showing all such required
easements, in accordance with the approved plans.
The runoff from all built -upon area within the permitted drainage area(s) of this project must be directed
into the permitted stormwater control system.
The following design criteria have been provided in the wet detention pond and must be maintained at
design condition:
a.
Drainage Area, acres:
3.50
Onsite, ftZ:
151,579
Offsite, ftz:
None
b.
Total Impervious Surfaces, ftz:
51,141
C.
Design Storm, inches:
1
d.
Average Pond Design Depth, feet:
3.06
e.
TSS removal efficiency:
90%
f.
Permanent Pool Elevation, FMSL:
35.0
g.
Permanent Pool Surface Area, ftZ:
8,121
h.
Permitted Storage Volume, ft3:
5,129
i.
Temporary Storage Elevation, FMSL:
35.6
j.
Controlling Orifice:
1.25"0 pipe
k.
Permitted Forebay Volume, ft3:
3,740
I.
Receiving Stream/River Basin:
Smith Creek / Cape Fear
M.
Stream Index Number:
18-74-63
n.
Classification of Water Body:
"C' Sw"
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.
During construction, erosion shall be kept to a minimum and any eroded areas of the system will be
repaired immediately.
The permittee shall at all time 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 re -vegetation of slopes and the vegetated filter.
d. Immediate repair of eroded areas.
e. Maintenance of all slopes in accordance with approved plans and specifications.
f. Debris removal and unclogging of outlet structure, orifice device, flow spreader, catch basins
and piping.
g. Access to the outlet structure must be available at all times.
Records of maintenance activities must be kept and made available upon request to authorized
personnel of DWQ. The records will indicate the date, activity, name of person performing the work
and what actions were taken.
Decorative spray fountains will not be allowed in the stormwater treatment system, as the permanent
pool volume is less than 30,000 cubic feet.
Page 2 of 5

Post Construction Stormwater Management
Permit No. SW8071026
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.
7. Upon completion of construction, prior to issuance of a Certificate of Occupancy, and prior to operation
of this permitted facility, a certification must be received from an appropriate designer for the system
installed certifying that the permitted facility has been installed in accordance with this permit, the
approved plans and specifications, and other supporting documentation. Any deviations from the
approved plans and specifications must be noted on the Certification. A modification may be required
for those deviations.
8. If the stormwater system was used as an Erosion Control device, it must be restored to design
condition prior to operation as a stormwater treatment device, and prior to occupancy of the facility.
9. Access to the stormwater facilities for inspection and maintenance shall be maintained via appropriate
recorded easements at all times
10. 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.
11. The Director may notify the permittee when the permitted site does not meet one or more of the
minimum requirements of the permit. Within the time frame specified in the notice, the permittee shall
submit a written time schedule to the Director for modifying the site to meet minimum requirements.
The permittee shall provide copies of revised plans and certification in writing to the Director that the
changes have been made.
III. GENERAL CONDITIONS
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.
Page 3 of 5

Post Construction Stormwater Management
Permit No. SW8071026
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,
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 projects
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.
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.
Page 4 of 5

Post Construction Stormwater Management
Permit No. SW8071026
Permit renewed, updated and reissued this the 2511 day of January 2023.
NORTH CAROLINA ENVIRONMENTAL MANAGEMENT COMMISSION
0�; M
at Douglas R. Ansel, I terim Director
Division of Energy, Mineral and Land Resources
By Authority of the Environmental Management Commission
Page 5 of 5

Attachment A
New Hanover County Murrayville Fire Station
Stormwater Permit No. SW8 071026
New Hanover County
Designer's Certification
Post Construction Stormwater Management
Permit No. SW8071026
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 specifications:
Signature
Registration Number
Date
Certification Requirements:
Page 1 of 2
SEAL

Post Construction Stormwater Management
Permit No. SW8071026
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: NCDENR-DWQ Regional Office
New Hanover County Building Inspections
Page 2 of 2

Attachment C - Permitting History
New Hanover County Murrayville Fire Station
Permit No. SW8 071026
Approval
Date
Permit Action
BIMS
Version
Description of the Changes
Modified Plan Sheets
High Density Commercial Project -construction, operation
Original
and maintenance of a wet detention pond(s) in
4/10/2008
Approval
1.0
compliance with the provisions of 15A NCAC 2H .1000.
2.0, 2.1, 2.3, 2.4
The stormwater control has been designed to handle the
runoff from 51,141 square feet of impervious area.
1/25/2023
Renewal
2.0
New expiration date 12/30/2029
Page 1 of 1

Date R' c rvey
Fee Paid
Permit Number
0 I
140109aq3l 8 5C6
I
I
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: SW8071026
2. Project name: New Hanover County Murrayville Fire Station
3. Project street address: 5901 Murravville Road
City: Wilmington County: New Hanover
ZIP: 28405
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.gov/abouUdivisions/energy-
mineral-land-resources/energy-mineral-land-ru les/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://deg. nc.gov/about/divisions/energy-mineral-land-
resources/energy-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:
6. Phone: [phone] Email: kcaison(o)nhcgov.com
State:
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JAN 2 0 2023
BY: _—
ZIP :
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/OR). 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.
Apk_ 4. O&M Agreements, Please select one:
❑ 1 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
® 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.
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 21H. 1043(3)(b).
https://www.sosnc.gov/online services/search/by title/ Business Registration
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JAN 2 0 2023 11
BY:
Stormwater Permit Renewal Application Form Page 2 of 3 May 11, 2018

D. PERMITT/EEE'S CERTIFICATION
I, ket/f0i e*A Soil 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: ///(S feLb e2 3
NOTARIZATION: r�
I, L /ctu I psi ne-e- Jr. a Notary Public for the State of
iqor-fk Corn liAa County of FcAer , do hereby certify
that Kew ;✓1 Ca" So/i personally appeared before me
this the day of 3jA uary 20 a3 , and acknowledge the due
i
execution of the forgoing instrument. Witness my hand and official seal,
JL PRINC�'�i
(Notary SDI
0)2 t9t0i�i� Sign�t�?e: F' Y� .
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Stormwater Permit Renewal Application Form Page 3 of 3 May 11, 2018

i NKT #07044
Permit No. Sal T 01109(l?
State of North Carolina (to be provided by D WQ)
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
DWO 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.
L PROJECT INFORMATION
Project Name: New Hanover County Murrayville Fire Statioin
Contact Person: J. Phillip Norris, P.E.
Phone Number: [phone]
For projects with multiple basins,
specify which basin this worksheet applies to:
elevations
Basin Bottom Elevation
25
ft.
(floor of the basin)
Permanent Pool Elevation
35
ft.
(elevation of the orifices)
Temporary Pool Elevation
35.6
ft.
(elevation of the discharge structure overflow)
areas
Permanent Pool Surface Area
8121
sq.
ft. (water surface area at the orifice elevation)
Drainage Area
3.5
ac.
(on -site and off -site drainage to the basin)
Impervious Area
1.17
ac.
(on -site and off -site drainage to the basin)
volumes
Permanent Pool Volume
20775
cu.
ft. (combined volume of main basin and forebay)
Temporary Pool Volume
5129
cu.
ft. (volume detained above the permanent pool)
Forebay Volume
3740
cu.
ft. (approximately 20% of total volume)
Other parameters
SA/DA'
3.37
(surface area to drainage area ratio from DWQ table)
Diameter of Orifice
1.25
in.
(2 to 5 day temporary pool draw -down required)
Design Rainfall
1
in.
Design TSS Removal 2
90
%
(minimum 85% required)
Form SWU-102 Version 3.99 Page 1 of 4

NEW RANOVER c=M CONTRACT # 08-0156
Footnotes:
I. When using the Division SA/DA tables, the correct SA/DA 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 non-
standard 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 BPOP manual provides design tables for both 85% TSS removal and 90% TSS removal.
H. 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).
b. The forebay volume is approximately equal to 20% of the basin volume.
c. The temporary pool controls runoff from the design storm event.
d. The temporary pool draws down in 2 to 5 days.
e. If required, a 30-foot vegetative filter is provided at the outlet (include non -erosive flow
calculations.
The basin length to width ratio is greater than 3:1.
The basin side slopes above the permanent pool are no steeper than 3:1.
A submerged and vegetated perimeter shelf with a slope of 6:1 or less (show detail).
Vegetative cover above the permanent pool elevation is specified.
A trash rack or similar device is provided for both the overflow and orifice.
A recorded drainage easement is provided for each basin including access to nearest right-
of-way.
I. 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.
in. A mechanism is specified which will drain the basin for maintenance or an emergency.
HI. 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) ❑ does ® does not incorporate a vegetated filter at the outlet.
This system (check one) ❑ does ® does not incorporate pretreatment other than a forebay.
Form SWU-102 Version 3.99 Page 2 of 4

NEW HANOVER COUNTY CONTRACT # 08-0156
Maintenance activities shall be performed as follows:
After every significant runoff producing rainfall event and at least monthly:
a. Inspect the wet detention basin system for sediment accumulation, erosion, trash accmmulation,
vegetated cover, and general condition.
b. Check and clear the orifice of any obstructions such that drawdown of 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
When the permanent pool depth reads
Sediment
Bottom
,al El. 32.75
ation 32
FOREBAY
7.5 feet in the main pond, the sediment shall be removed.
2.25 feet in the forebay, the sediment shall be removed.
BASIN DIAGRAM
(fill in the blonkt)
Permanent Pool Elevation 35
Sediment Removal Elevation 27.5 75%
Bottom Elevation 25 25%/
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.
Form SWU-102 Version 3.99 Page 3 of 4

NEW HANOVER COUNTY CONTRACT # 08-0156
7. ! All components of the wet detention basin system shall be maintained in good working order.
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.
Print name: Bruce Shell
Tide: New Hanover
Address: 230 Government Center Drive, Suite 195 Wilmington, NC 28403
Phone:
Signature:
Date: 9 — 1.7 — O
Note: The legally responsible parry should not be a homeowners association unless more than 50%of the lots have been sold and
a resident of the subdivision has been named the president.
I, Ety5dt A- wyNr ,aNotary Public for the State of /\/0rY-1, C4r0/ih0.
County of New do hereby certify that At�sife' R. Ida I Ie4+-,
Personally appeared before me this 121" day of Sfp+CM Lf!„ Zoo'! , and acknowledge the due
Execution of the foregoing wet detention basin maintenance requirements. Witness my hand and official seal.
'z? N0TARYi
M.
• SU
y '�VBL1C• • Z ;
DER C�
JL.f1L
Signature C� p„t a _ ckjl�
My commission expires igS(o%7le g
Form SWU-102 Version 3.99 Page 4 of 4
Approved as to formAunty Attorney

I,/
New Hanover County Murrayville Fire Station
Stormwater Permit No. SW8 071026
New Hanover County
Designer's Certification
State St o water Management Systems
Permit No. SW8 071026
imp
1, John Phillip Norris , as a duly registered Professional Engineer in the
State of North Carolina, having been authorized to observe (periodically/ weekly/ full
time) the construction of the project,
lle Fire Station
for New Hanover county (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:
Signature
Registration Number 1148E
Date October 20, 2009
M
esn
I2
.8y, 2 ?Op9
SEAL
Page 6 of 7

State Stormwater Management Systems
Permit No. SW8 071026
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.
The outlet structure elevations are per the approved plan.
§✓The outlet structure is located per the approved plans.
Trash rack is provided on the outlet structure.
8. All slopes are grassed with permanent vegetation.
-Vegetated slopes are no steeper than 3:1
The inlets are located per the approved plans and do not cause short-
circuiting of the system.
-The permitted amounts of surface area and/or volume have been
provided.
Required drawdown devices are correctly sized and located per the
approved plans.
All required design depths are provided.
All required parts of the system are provided, such as a vegetated shelf,
and a forebay.
The required system dimensions are provided per the approved plans.
All components of the stormwater BMP are located in either recorded
common areas, or recorded easements.
cc: NCDENR-DWQ Regional Office
New Hanover County Building •Inspections
"tax MoyWeit - rINC projee+ �1 r
.3urt 5Wi rtson - �i ><� e etf wo l `' _Y&a 3rs
ocT 2 2 2009
Page 7 of 7 BY: