SW8011020_CURRENT PERMIT_20210809

STORMWATER DIVISION CODING SHEET
POST -CONSTRUCTION PERMITS
PERMIT NO.
SW8 as 2 U
DOC TYPE
1�0 CURRENT PERMIT
❑ APPROVED PLANS
❑ HISTORICAL FILE
❑ COMPLIANCE EVALUATION INSPECTION
DOC DATE
2U21p 5� og
YYYYMMDD

ROY COOPER
Governor
ELIZABETH S. BISER
Secretary
BRIAN WRENN
Director
August 9, 2021
NORTH CAROLINA
Errvrroaraeatar Qualrty
The University of North Carolina at Chapel Hill
Attu: George E. Battle, III, Vice Chancellor for Institutional Integrity and Risk Management
CB 1005
Chapel Hill, NC 27599
Subject: Permit Renewal
State Stormwater Management Permit No. SW8 011020
Fisheries Research Lab and Shop Building Replacement
Carteret County
Dear Mr. Battle:
Effective August 1, 2013 the State Stormwater 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 stormwater 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 issuance 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
stormwater 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 Wilmington Regional Office received a complete 8 year Stormwater Management Permit Renewal Application for
the subject project on August 4, 2021. The Division is hereby notifying you that permit SW8 011020 has been renewed
on August 9, 2021, and shall be effective until March 6, 2030, which includes all available extensions. For your
records, please find enclosed a renewed, updated, and re -issued permit and a copy of the renewal application. Please
keep this permit on file at all times. Please note that the renewed, updated, and re -issued permit does not impose new
or different terms; it merely restates some of the previous terms to provide you with a better understanding of your
obligations under the permit.
The renewal and reissuance of this stormwater permit does not imply that the site is currently in compliance with the
terms and conditions of this state stormwater permit_ The plans originally approved on March 6, 2002, renewed on
November 21, 2011, will remain in full force and effect in accordance with the regulations set forth in Title 15A NCAC
2H.1000.
This permit is subject to the conditions and limitations as specified therein. Please pay special attention to the
conditions listed in this permit regarding the Operation and Maintenance of the BMP(s), recordation of deed
restrictions, procedures for changes of ownership, transferring the permit, and renewing the permit. Failure to establish
an adequate system for operation and maintenance of the stormwater management system, to record deed restrictions,
to transfer the permit, or to renew the permit, 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 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.
D_E O%Z North Carolina Department of Environmental Quality I Division of Energy, Mineral and Land Resources
Wilmington Regional Office 1127 Cardinal Drive Extension I Wilmington. North Carolina 28405
riwm.0 uwn
��++�� 910.79b.7215

State Stormwater Permit No. SW8 011020
Page 2 of 2
If you have any questions, need additional copies of the permit or approved plans, please contact Ashley Smith in the
Wilmington Regional Office, at [phone] or [e-mail].
Sincerely,
U WA
5�; Brian Wrenn, Director
Division of Energy, Mineral and Land Resources
Enclosures: Attachment C — Permitting History
Renewal Application Documents
DES/arcs: WStormwater\Permits & Projects\2001\011020 HD\2021 08 permit 011020
cc: NCDEQ-DEMLR Wilmington Regional Office
Nz �'� 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
�v� /'5o 910.796.7215

State Stormwater Management Systems
Permit No. SW8 011020
STATE OF NORTH CAROLINA
DEPARTMENT OF ENVIRONMENTAL QUALITY
DIVISION OF ENERGY, MINERAL AND LAND RESOURCES
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
University of North Carolina at Chapel Hill
Fisheries Research Lab and Shop Building Replacement
Arendell Street, Carteret 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 Energy. Mineral and Land Resources (the "Division" or "DEMLR")
and considered an enforceable part of this permit.
This permit shall be effective from the date of issuance until March 6, 2030, and shall be subject to the
following specified conditions and limitations:
1. 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. The original permit conditions contained in the permit issued on March 6, 2002, remain in full
force and effect, except as amended herein.
3. This stormwater system has been approved for the management of stormwater runoff as
described on page 2 of this permit, the Project Data Sheet. The stormwater control has been
designed to handle the runoff from 9,554 square feet of impervious area. This system must be
operated with a 50' vegetated filter.
4. Approved plans and specifications for this project are incorporated by reference and are
enforceable parts of the permit.
5. The tract will be limited to the amount of built -upon area indicated on page 2 of this permit, and
per approved plans.
6. 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.
Page 1 of 5

State Stormwater Management Systems
Permit No. SW8 011020
7. 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.
PROJECT DESIGN DATA SHEET
Project Name: Fisheries Research Lab and Shop Building
Replacement
Permit Number: SW8 011020
Location: Carteret County
Applicant: Mr. George E. Battle, III, Vice Chancellor for
Institutional Integrity and Risk Management
Mailing Address: CB 1005
Chapel Hill, NC 27599
Application Date: August 4, 2021
Name of Receiving Stream/Index #: White Oak / Bogue Sound / 20-36-(8.5)
Classification of Water Body: "SA"
Trench Dimensions, LxWxH, feet: 72 x 30 x 1.5
Perforated Pipe Diameter & Length: 18" cp / 720 feet (10 runs of 72' each)
Drainage Area, acres: 0.22
Offsite Area entering Pond, ft2: None, per engineer
Total Impervious Surfaces, ft2: 9,554
Required Storage Volume, ft': 1,194
Provided Storage Volume, ft': 1,836
Trench Bottom Elevation. FMSL: 11.5
Temporary Storage Elevation, FMSL: 13
Type of Soil: Sand
Expected Infiltration Rate: 4 inches per hour
Seasonal High Water Table Elevation: 9.5 FMSL
Time to Draw Down: 1.7 hours
Page 2 of 5

State Stormwater Management Systems
Permit No. SW8 011020
II. SCHEDULE OF COMPLIANCE
The stormwater management system shall be constructed in it's 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 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 vegetated filter.
d. Immediate repair of eroded areas within the project.
e. Maintenance of side slopes in accordance with approved plans and specifications.
f. Debris removal and unclogging of bypass structure, overflow weir, flow spreader, catch
basins and piping.
g. Access to the bypass structure must be available at all times.
h. Pump maintenance to insure correct operation.
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. 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.
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.
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.
Prior to the sale or lease of any portion of the property, the permittee shall notify the Division
and provide the name, mailing address and phone number of the purchaser or leasee. An
access/maintenance easement to the stormwater facilities shall be granted in favor of the
permittee if access to the stormwater facilities will be restricted by the sale or lease of any
portion of the property.
9. The permittee is responsible for verifying that the proposed built -upon area does not exceed
the allowable built -upon area.
10. 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 3 of 5

State Stormwater Management Systems
Permit No. SW8 011020
11. 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.
12. 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. Any items not in compliance must be
repaired, replaced restored, or resolved prior to the transfer. Records of maintenance activities
performed to date may be requested.
III. GENERAL CONDITIONS
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.
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.
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.
Permit Transfer: This permit is not transferable to any person or entity except after notice to
and approval by the Director. The permittee shall submit a completed and signed "Permit
Transfer Application Form" (available on the Division website) accompanied by the required
fee and supporting documentation as listed on the form, to the Division at least 60 days prior
to any one or more of the following events:
a. The sale or conveyance of the project area in whole or in part, except in the case of an
individual lot sale that is made subject to the recorded deed restrictions and protective
covenants,
b. Dissolution of the partnership, corporate, or LLC entity, subject to NCGS 55-14-05 or
NCGS 57D-6-07 and 08,
C. Bankruptcy;
d. Foreclosure, subject to the requirements of Session Law 2013-121,
Page 4 of 5

State Stormwater Management Systems
Permit No. SW8 011020
Current Permittee Name or Address Changes: The permittee shall submit a completed
"Permit Information Update Application Form" (available on the Division website) to the
Division within 30 days to making any one or more of the following changes:
a. A name change of the current permittee;
b. A name change of the project;
C. A mailing address change of the permittee;
6. The permittee is responsible for compliance with all terms and conditions of this permit until
the Division approves the transfer request. Neither the sale of the project, in whole or in part,
nor the conveyance of common area to a third party constitutes an approved transfer of the
permit.
7. The permittee grants Division Staff permission to enter the property during normal business
hours to inspect all components of the permitted project.
8. 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 permit conditions.
9. Approved plans, application documents, supplements, calculations, operation and
maintenance agreement, and specifications for this project are incorporated by reference and
are enforceable parts of the permit. A copy of this permit, application, supplements, operation
and maintenance agreement, and approved plans and specifications shall be maintained on
file by the permittee.
10. Unless specified elsewhere, permanent seeding requirements for the on -site stormwater
system must follow the guidelines established in the North Carolina Erosion and Sediment
Control Planning and Design Manual.
11. 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.
12. 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).
Permit renewed, updated and reissued this the 9th day of August 2021.
NORTH CAROLINA ENVIRONMENTAL MANAGEMENT COMMISSION
iWi Tan n, irec or
Division of Energy, Mineral and Land Resources
By Authority of the Environmental Management Commission
Page 5 of 5

Attachment C - Permitting History
Fisheries Research Lab & Shop Building
Permit No. SW8 011020
Approval
Date
Permit
Action
BIMS
Version
Description of the Changes
3/6/2002
Original
Approval
1.0
11/21/2011
Renewal
2.0
8/9/2021
Renewal
3.0

DEMLR USE ONLY
Date Re ive
Fee Paid
Permit Number
` Zl
pal 5 $
tct D DAD 11
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: SW8011020
2. Project name: UNC-CH Institute of Marine Sciences Fisheries Research Lab & Shoo Buildin
3. Project street address: 3431 Arendell Street
City: Morehead City County: Carteret —ZIP: 28557
4. What, if any, changes have been made to the project as permitted? none
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/about/divisions/energv-
mineral-land-resources/energv-minera I-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://deg nc qov/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: The University of North Carolina at Chapel Hill
2. Signing Official's Name: George E. Battle, III
3. Signing Official's Title: Vice Chancellor for Institutional Integrity and Risk Management
4. Mailing Address: CB 1005
City: Chapel Hill State: NC ZIP : 27599-1005
5. Street Address: 123 West Franklin Street Suite 600E
City: Chapel Hill State: NC ZIP: 27516
6. Phone: ( 919) 445-1248 Email: gbattle3(a)ad.unc.edu
Yt9
AUG 0 4 2021
Bv:_•
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/ORM. 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:
6� 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.
NA 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.
(sue l �4. O&M Agreements, Please select one:
❑X 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
❑ 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
ElThe project has not yet been built.
i/t /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.
NA 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).
https://www.sosnc.gov/online services/search/by title/ Business Registration
t
AUG 0 4 2021
Stormwater Permit Renewal Application Form Page 2 of 3
May 11, 2018

D. PERMITTEE'S CERTIFICATION
I, George E. Battle III the person legally responsible for the permit, certify that I have a copy
of the Permit and O&M Agreement on site (or 1 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. // I
Signatur Date: �7/ -26/ —DL 1
this the 20 v day of
execution of the forgoing instrument. Witness my hand and official seal,
(Notary Seal)
Notary Signature: o A&
My commission expires 10 p r2q
a Notary Public for the State of
do hereby certify
personally appeared before me
20-14—, and acknowledge the due
AUG 04
2021
Stormwater Permit Renewal Application Form Page 3 of 3 May 11, 2018

t�:/ititi�t jt�l
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Permit No. SW 1 2 O
(to be provided by,DWQ)
State of North Carolina
Department of Environment and Natural Resources
Division of Water Quality -
STORMWATER MANAGEMENT PERMIT APPLICATION FORM
UNDERGROUND INFILTRATION TRENCH SUPPLEMENT
This form may be photocopied for use as an original
DWO 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.
.;L. PROJECT INFORMATION
Project Name: Fisheries Research Lab and Shoo Building Reolacemen
Contact Person: John Masson Phone Number: (919 ) 962-7019
For projects with multiple infiltration systems, a supplement form must be completed for each system. This
worksheet applies to: Trench 1 in Drainage Area 1
(from plans) (from Form SWU-101)
U. DESIGN INFORMATION (attach supporting calculations/documentation):
Soils Report Summary (based upon an actual field investigation and soil borings)
Soil Type Sand
Infiltration Rate 4 in/hr r cf/hr/sf (circle appropriate units)
SHWT Elevation 9.5' fmsl (Seasonal High Water Table elevation)
Trench Design Parameters
Design Volume
Design Storm
Drawdown Time
Perforated Pipe Size
Perforated Pipe Length
No. Observation Wells
Stone Type (if used)
Stone Void Ratio
1195 c.f.
1.5 inch event (1.5 inch event for SA waters, 1 inch event for others)
D. o b 9 days
18 inch diameter
720
0 (may be required on a case -by -case basis)
Trench Elevations (in feet mean sea level)
Bottom Elevation 11.5 fmsl
Storage/Overflow Elevation 13.0 fmsl
Form SWU-107 Rev 3.99 Page I of 4

Trench Dimensions 1
Height
Width 30 ft.
M. REQUIRED ITEMS CHECKLIST
I.en th
Volume Provided
72.0' ft.
/83[o cu.ft.
The following checklist outlines design requirements per the Stormwater Best Management Practices manual (N.C.
Department of Environment, Health and Natural Resources, November 1995) and Administrative Code Section: 15
A NCAC 2H .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 Form, the agent may initial below. Attach justification if a requirement has not been met.
Applicants Initials
a.
System is located 50 feet from class SA waters and 30 feet from other surface waters.
-�-OC b.
System is located at least 100 feet from water supply wells.
-P-bC c.
Bottom of system is at least 2 feet above the seasonal high water table.
DC d.
Bottom of the system is 3 feet above any bedrock or impervious soil horizon.
DC e.
Off-line system, runoff in excess of the design volume'bypasses the system (bypass detail
provided).
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 hydrogeologic evaluation may be required).
Zee g.
Soils have a minimum hydraulic conductivity of 0.52 inches per hour.
t2 bC h.
System is not sited on or in fill material or DWQ approval has been obtained.
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.
j. System is sized to take into account the runoff at t}ie ultimate built -out potential from all
surfaces draining to the system, including any off -site. drainage.
l2DC k. System is located in a recorded drainage easement for the purposes of operation and
maintenance and has recorded access easements to the nearest public right-of-way.
flC 1. System captures and infiltrates the runoff from the first 1.0 inch of rainfall (1.5 inch event
for areas draining to SA waters ).
iZDc in. Drainage area for the device is less than 5 acres.
1Z7�C n. A pretreatment device ( filter strip, grassed swale, sediment trap, etc.) is provided.
Izp (_ o. Trench bottom is covered with a layer of clean sand to an average depth of 4 inches.
ADC p. Sides of the infiltration trench are lined with geotextile fabric.
AC q. Rock used is free of fines (washed stone) and has a large void ratio.
g r. Side to bottom area ratio is less than 4:1.
Form SWU-107 Rev 3.99 Page 2 of 4 �>-

s. Observation well(s) are provided (case -by -case basis).
t. Vegetated filter is provided for overflow (50 feet for SA waters, 30, feet for other waters) and
detail is shown on plans.
u. A benchmark for checking sediment accumulation is provided.
IV. UNDERGROUND INFILTRATION TRENCH 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 system for erosion, trash accumulation, grass cover, and general
condition.
2. Repair eroded areas immediately, re -seed as necessary to maintain adequate vegetative cover, mow vegetative
cover to maintain a maximum height of six inches, and remove trash and blockages as needed to maintain
system performance.
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 1 foot of the bottom of the system for a 0eiibdcf three months)
shall be reported to DWQ immediately.'
5. If DWQ determines that the system is failing, the system will immediately be repaired or replaced to original
- design specifications. If the system cannot be repaired to perform its design function, other stormwater control
devices as allowed by NCAC 2H .1000 must be designed, approved and constructed.
Remove accumulated sediment from the infiltration system annually or when depth in the unit is reduced
to 75% of the original design depth. The system shall be restored to the original design depth without
over -excavating. Over -excavating may cause the required water table separation to be reduced and may
compromise the ability of the system to perform as designed. Removed sediment shall be disposed of in
an appropriate manner and shall not be handled in a manner that will adversely impact water quality (i.e.
stockpiling near a stormwater treatment device or stream, etc.).
A benchmark shall be established in the infiltration system. The benchmark will document the original
design depth so that accurate sediment accumulation readings can be taken. The measuring device used
to determine the depth at the benchmark shall be such that it will give an accurate depth reading and not
readily penetrate into accumulated sediments.
When the depth at the benchmark reads the accumulated sediment shall be removed
from the system.
Form SWU-107 Rev 3.99 Page 3 of 4

1 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.' - -
.9
Print Name and Title: Nancy D. Suttenfield BKc�cm
Address: University of North Carolina; CB# 1000,300 South Building, Chanel Hill NC, 27599
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, 7-EtZE574_ GU• /.AWS ' a Notary Public for the State of NoQTH tJiROUNR , County of
NA ct�� P • S 1471E FISLD VICE CA4NC6cLGIQ
�RRN6E do hereby certify that POO N.41yCE ANd AnAtNrsneanow personally appeared before me this
day of OcryBER 9007 and acknowledge the due execution of the forgoing infiltration
basin maintenance requirements. Witness my hand and official seal,
SEAL." My commission expires
Form SWU-107 Rev 3.99 Page 4 of 4.

1�
State Stormwater Management Systems
5
Permit No. SW8 011020
T; Jd t 11.
' Fisheries research
Lab and Shop Building Replacement:"
Stormwater Permit No. SW8 011020
Cart(�ret County
Designer's Certification
-fir"n
viii,)", YT,
Y."as duly re n in
the State of North Carolina, haVinglbi:�n authorized to obse e (perio ic ly/wee ly/full time) the construction of
the project,
(Project)
fors Ajc,,Icy -ILjerl�,Aj _(Project Owner) hereby state that, to the best of my abilities, due care
and diligence w8 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.
H
CA
Signature, % T 't 7
J
Registration Number 33
Date
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+_ State Stormwater Management Systcros 1
ti
Permit No. S W 8 611020
Certification Requirements:
�i2.1. The drainage area to the system contains approximately the permitted acreage:
The drainage area to the system contains no more than the permitted amount of built -upon area.
All the built -upon area associated with the project is graded such that the runoff drains to the system.
PY-4. The outlet/bypass structure elevations are per the approved plan.
The outlet structure is located per the approved plans.
01-A 6. Trash rack is provided on the outlet bypass structure.
�rLts. All slopes are grassed with permanent vegetation.
�"• ' • �5, Vegetated slopes are no steeper than 3:1.
f�iK J The inlets are located per the approved plans and do not cause short-circuiting of the system.
10. The permitted amounts of surface area and/or volume have been provided.
n' I I. Required drawdown devices are correctly sized per the approved plans.
2. All required design depths are provided.
N IA13. All required parts of the system are provided, such as a vegetated shelf, and a forebay.
The overall dimensions of the system, as shown on the approved plans, are provide&.
cc: NCDENR-DWQ Regional Office
Town of Morehead City Building Inspections
7