SW8970128_CURRENT PERMIT_20181019

STORMWATER DIVISION CODING SHEET
POST -CONSTRUCTION PERMITS
PERMIT NO.
SW8 �11012
DOC TYPE
® CURRENT PERMIT
❑ APPROVED PLANS
❑ HISTORICAL FILE
❑ COMPLIANCE EVALUATION INSPECTION
DOC DATE
20\ s 10 m
YYYYMMDD

ROY COOPER NORTH CAROLINA
Governor Environmental Quality
MICHAEL S. REGAN
Secietary
WILLIAM E. (TOBY) VINSON. JR
Interm Director
October 19. 2018
UNC Wilmington
Attn: Vice Chancellor for Business Affairs
c/o Mark Morean, Associate Vice Chancellor for Business Affairs -Facilities
601 S College Rd
Wilmington, NC 28403
Subject: Approved Minor Modification
Stormwater Permit No. SW8 970128
UNC Wilmington — Honors, International, and Privatized Housing, and Associated
Parking Lot Improvements Phase 1
New Hanover County
Dear Mr. Morgan
On October 18, 2018, the Wilmington Regional Office of the Division of Energy, Mineral and Land
Resources received and accepted a complete minor modification application for changes to the approved
plans for Stormwater Management Permit Number S\v8 970128. It has been determined that the nature of
the proposed change meets the definition of a minor modification in that it does not result in an increase in
the size of the permitted stormwater control measure (SCM) and does not increase the amount of built -upon
area. Please refer to Attachment 1 for a detailed description of the current proposed minor modification and
a list of all the past modifications approved during the effective period of the permit. We are forwarding you
an approved copy of the modified plans for your files. Please add the attached plans to the previously
approved plan set.
Please be aware that all terms and conditions of the permit issued on June 21, 2017, remain in full force and
effect. Please also understand that the approval of this minor modification to the subject State Stormwater
Permit is done on a case -by -case basis Any other changes to this project must be approved through this
Office prior to construction The approval of this minor modification does not preclude the permittee from
complying with all other applicable statutes, rules, regulations or ordinances which may have jurisdiction
over the proposed activity, and obtaining a permit or approval prior to construction.
If you have any questions concerning this matter, please do not hesitate to call me at [phone] or via
email at christine.hall@ncdenr gov.
Sincerely,
.��s�hr� z-
Christine Hal
�s Environmental Engineer
Enclosures Attachment I — Permnhng History
GDS\canh \\\StormwaterAPermits & Prolects\l997\970128 IID\2018 10 permit minor 970128
cc: T Jason Clark, PE; Norris & Tunstall Consulting Engineers
Wilmington Regional Office Stormwater File
Notch Carolina Department of Environmental Quality I Division of Energy. Mineral and Land Resources
Wilmington Regional ORicc 1127 Cardinal Drive Extension I Wilmington, North Carolina 28405
910.796 7215

Attachment 1 - Permitting History
UNC Wif rnington - Honors, International, and Privatized Housing and Associated Parking Lot Improvements Phase 1
Permit No. SW8970128
Approval
Permit Action
BIMS
Description of the Changes
Comments
Date
Version
-
5/13/1997
Original Approval
1 0
6/25/2002
Plan Revision
-
Revision to the site layout 'No increase in built -upon area
(BUA)
3/7/2005
Modification
11
Increasing project area, drainage area (DA). and BUA for the
Privatized Housing project
4/23/2008
Plan Revision
1 2
Reducing the service lot behind Wagoner Hall 606 sf of future
BUA made available
Adding 42,210 sf of BUA to account for BUA approved under
12/19/2008
Modification
1 3
SW8 080406 that is directed to this system (subject to SL 2006-
246).
Adding 3,206 sf orBUA fzi the construction of a building and
areas identifiedhperi
5/5/2009
Modification
1 4
changes to the pavement/sidewalk related to the reginal energy
plant (subject to SL 2008-211)-
separately
separately m the permit
Drainage improvements along Cahill Drive i esulting in
(inadvertently left off.
5/29/2014
Plan Revision
1 5
narrowing the roadway; adding curbing, and reallocating the
BUA.
previous version)
' Increasing project area, DA, and BUA for Phase 1 of the
parking improvements which include expanding Lot I A and
adding Lot 1B. Including an allocation of future BUA. This
expansion is subject to the 2017 Rules
6/21/2017
Major Modification
1.6
' Clarifying the DA and BUA directed to the pond to match the
as -built condition Better documentation of adjacent permits
directing runoff to the pond.
' Increasing the size of the wet pond and re -permitting it under
the 2017 Rules.
Due to site layout and grading changes associated with SWS
0/19/2018
D1mor r\4odtficaUon
7
990427, the DA for this project is reduced by 22,576 sf It has
been demonstrated that the previously approved pond is still
adequately sized
Page 1 of 1

" DEMLR USE ONLY
Date Received
Fee Paid
Permit Number
1
o. of
�O DoI
yog 7(
WE
STORMWATER PERMITTING. FORM 7:
MINOR MODIFICATION
Standard Permitting Program — No Fee for Minor Modification
Express Permitting Program — See Express Fee.Schedule
� OF —I E
JUL 05 2018
BY:-------- ---
Only complete applications packages will be accepted and reviewed. This form and the required items (with
original signatures) must be sent to the appropriate DEMLR Regional Office, which can be determined by locating
the project on the interactive online map at http://deg.nc.aov/contact/recional-of ices.
This form is to only to be used by the current permittee to notify the Division of a minor
modification. Pursuant to Rule 15A NCAC 02H.1002. a minor modification is a change to the project that:
1) does not increase the net built -upon area; and/or
2) does not change the size or design of the SCM(s).
N�1�I�f�ai
A. GENERAL INFORMATION
1. State Stormwater Permit Number: SW8 970128
2. Current Permit Holder's Company Name/Organization: 'University of North Carolina - Wilmington
3. Signing Official's Name: Mark D. Morgan
4. Signing Official's Title: Associate Vice Chancellor for Business Affairs - Facilities
5. Mailing Address: 601 S. College Road
City: Wilmington State: NC ZIP: 28403'
6. Street Address (if different):: Same as Above
City: State: ZIP:
7. Phone: [phone] Email: morganm(rDuncw edu
8. Describe the minor modifications that you are requesting, including any revised BUA allocations (attach
additional pages or supporting tables similar to Section IV.10 of the original application, if needed):
The drainage area to the stormwater pond is being reduced by 22,576 SF The BUA remains
unchanged "The designed / approved stormwater pond is sized for the new drainage area '
reduced drainage area)
B. SUBMITTAL REQUIREMENTS
Please mark 'Y" tq 6')7frrm the4tems are included with this form. Please mark W' if previously provided. If not
applicable or not available, please mark N/A.:
X 1. Two hard -copies (with original signatures) and one electronic copy of this completed form.
X 2. Two hard copies and one electronic copy of the revised plan sheets. (must be a revision of the
originally approved plan sheets).
N/A 3. If thebe,is realfdcation of lot BUA, a copy of the revised recorded deed restrictions and protective
covenants'OR the proposed recorded deed restrictions and protective covenants documenting
the changes and a signed agreement to provide the final recordedsdocumentf
NIA 4. If applicable, the appropriate Express review fee.
t.lt JUL 5 0 G010
i
BY:
Stormwater Permit Form 7: Minor Modification Page 1 of 2 July 14, 2017

C. CONTACT INFORMATION
1. The Design Professional who is authorized to provide information on the Applicant's behalf:
Design Professional's Name: T. Jason Clark. P.E.
Consulting Firm: Norris & Tunstall Consulting Engineers. P.C.
Mailing Address:902 Market Street
City:Wilmington State:NC Zip:28401
Phone: [phone] Fax: [phone]
Email: iclark •ntengineers.com cc: anorris(o)ntengineers com
2. [OPTIONAL] If you would like to designate another person to answer questions about the project:
Name & Title:
Organization:
Mailing Addre
State: Zip:
Phone:
Email:
D. CERTIFICATION OF PERMITTEE
I, /W#e17 Z,2 %�%� � , the current permittee, certify that I have authorized the minor modifications listed
in Section A and shown in the attached revised plan sheets. I further attest that this information is accurate and
complete to the best of my knowledge.
Signature:
7,17
Date:
I. GVt j U`i Aa:r a Notary Public for the State of Oa
County of do h@reby certify that o
personally app ared before me this the riZ^ day of 20-UL and
acknowledge the due execution of the forgoing instrument. Witness my hand and official seal,
(Notary Seal)
Notary Signature �y p
My commission expires /'0 ,,26 /!
" JUL 3 0 2010
`�Pt�Etl<IF A(Fl9y':
Nol O
VC p noV Pp /c p
0 6/
07 p /tppn COun/Y ¢
,Y2019 xAbea`
Stormwater Permit Form 7: Minor Modification Page 2 of 2 Oct 6, 2017

SW8 970128
UNW-16050
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ATTACHMENT A
DRAINAGE AREA/IMPERVIOUS BREAKDOWN (REVISED 7-2018)
Basin Information
Drainage Area to Pond
(6-21-2017 Permit)
Drainage Area BYPASS
JULY 2018 DA TO POND
Drainage Area TOTAL
Receiving Stream Name
UT Bradley Creek
UT Bradley Creek
UT Bradley Creek
UT Bradley Creek
Stream Class
SC; HOW
SC; HOW
SC; HOW
SC; HOW
Stream Index Number
18-87-24-4-(1)
18-87-24-4-(1)
18-87-24-4-(1)
18-87-24-4-(1)
Total Drainage Area (sf)
1,480,114
49,626
1,457,538
1,507,164
On -site Drainage Area (so
1,186,970
49,626
1,164,394
1,214,020
Dff-site Drainage Area (sf)
293,144
0
293,144
293,144
total Proposed Impervious Area (sf)
778,802
15,129
778,802
793,931
Onsite Proposed Impervious Area
669,464
15,129
669,464
684,593
Total % Impervious Area
52.62%
30.49%
53.43%
52.68%
C nsite % Impervious Area
56.40%
30.49%
57.49%
56.39%
Impervious Surface Area
Drainage Area to Pond
Drainage Area BYPASS
JULY 2018 DA TO POND
Drainage Area TOTAL
On -site Buildings/Lots (so
0
0
0
0
On -site Streets (sf)
0
0
0
0
On -site Parking (so (@1.5")*
78,715
2,410
78,715
81,125
On -site Sidewalks (sf) (@1.5")'
9,823
6,941
9,823
16,764
1988-2008 (@1.011)**
410,231
3,688
410,231
413,919
2008-2017 (@1
63,951
454
63,951
64,405
SW8 021218
0
0
0
0
SW8 061204 (@1.0")**
19,786
0
19,786
19,786
SW8 080406 (@1.5"-SL 2006-246)
12,242
0
12,242
12,242
SW8020404 (@1.011)**
41,857
0
41,857
41,857
SW8 980427 (@1.011)**
1,814
0
1,814
1,814
Future (@1.5")*
85,000
0
85,000
85,000
Off -site (sf) 1988-2008 (@1.0")**
29,446
0
29,446
29,446
Off -site (sf) 2008-2017 (@1.5")*'*
4,193
0
4,193
4,193
Existing Pre-1988 BUA (so (@1.5")*
21,744
1,636
21,744
23,380
Total (sf)
778,802 1
15,129
778,802
793,931
2017 Rules
* 1995 Rules
SL 2008-211
t;
JUNE 2018 DATO POND (REFLECTS REDUCTION IN TOTAL ON -SITE DA BY 22,576 SF, NO CHANGE TO IMPERVIOUS)

Project Name: IUNC Wilmington - Parking Lot Improvements Phase 1
Project Location: lWalton Drive and Community Drive - Wilmington, NC 28403
Maintenance records shall be kept on the following BMP(s). This maintenance record shall be kept In a log In a known set locatlo
Any deficient BMP elements noted in the inspection will be corrected, repaired, or replaced Immediately. These deficiencies can
affect the integrity of structures, safety of the public, and the pollutant removal efficiency of the BMP(s).
The BMP(s) on this project include (check all that a
Bioretention Cell
Dry Detention Basin
Grassed Swale
Green Roof
Infiltration Basin
Infiltration Trench
Level SpreaderNFS
Permeable Pavement
Proprietary System
Rainwater Harvesting
Sand Filter
Stormwaler Wetland
Wet Detention Basin
Disconnected Impervious Area
User Defined BMP
O&M tables will
Location(s):
Location(s):
Location(s):
Location(s):
Location(s):
Location(s):
Location(s):
Location(s):
Location(s):
Location(s):
Location(s):
Location(s):
Location(s):
Location(s):
Location(s):
I acknowledge and agree by my signature below that I am responsible for the performance of the maintenance procedures listed for
each BMP above, and attached O&M tables. I agree to notify NCDENR of any problems with the system or prior to any changes to
the system or responsible party.
Responsible Party: UNC Wilmington
Title & Organization: Mark Morgan/ Associate Vice Chancelor for Business Affairs - Fact
Street address: 601 S. College Road
City, state, zip: Wilmington, NC 26403
Phone number(s): [phone] Fax: [phone]
Email: [e-mail]
Signature: Date:
I, 0. , a Notary Public for the State of pr�i �lT rel.n 2
County of %%Gt i k e).vi 1I, , do hearby certify that
personally appeared before me this /0` day of ' ?2?.,qX and
acknowledge the due execution of the 'ons and Mainte an r ement .
Witness my hand and official seal, _�t��
t1t1111111IIfll/% .—/ ������
o•` Pa 'I'q��O.,
No, yo' t MAY 12 2017
`mye � amm '88Or C �MY RY:
. 019 #Dlrea
commission expires 3- 62419
STORM-EZ 5/10/2017
version 1.4 O&M Manual Page 1 of 4

T rOnU�1

I Wet Detention Pond Maintenance Requirements I
The wet detention basin system is defined as the wet detention basin, pretreatment including forebays and the vegetated filter if one
is provided
Important maintenance procedures
Immediately after the wet detention basin is established, the plants on the vegetated shelf and perimeter of the
basin should be watered twice weekly if needed, until the plants become established (commonly six weeks).
No portion of the wet detention pond should be fertilized after the first initial fertilization that is required to
establish the plants on the vegetated shelf
Stable groundcover should be maintained in the drainage area to reduce the sediment load to the wet detention
basin.
If the basin must be drained for an emergency or to perform maintenance, the flushing of sediment through the
emergency drain should be minimized to the maximum extent practical
Once a year, a dam safety expert should inspect the embankment
After the wet detention pond is established, it should be inspected once a month and within 24 hours after every storm event
greater than 1.0 inches (or 1.5 inches if in a Coastal County). Records of operation and maintenance should be kept in a known
set location and must be available upon request.
Inspection activities shall be performed as follows. Any problems that are found shall be repaired immediately
BMP element:
Potential problem:
How I will remediate the problem:
The entire BMP
Trash/debris is present.
Remove the trash/debris
The perimeter of the BMP
Areas of bare soil and/or
Regrade the soil if necessary to remove the gully, and then plant a
erosive gullies have formed,
ground cover and water until it is established. Provide lime and a one-
time fertilizer application
Vegetation is too short or too
Maintain vegetation at a height of approximately six inches
long.
The inlet device
The pipe is clogged.
Unclog the pipe. Dispose of the sediment off -site.
The pipe is cracked or
Replace the pipe.
otherwise damaged.
Erosion is occurring in the
Regrade the swale if necessary to smooth it over and provide erosion
swale
control devices such as reinforced turf matting or riprap to avoid future
problems with erosion.
Stone verge is clogged or
Remove sediment and replace with clean stone
covered in sediment (if
applicable)
The forebay
Sediment has accumulated to
Search for the source of the sediment and remedy the problem if
a depth greater than the
possible Remove the sediment and dispose of it in a location where it
original design depth for
will not cause impacts to streams or the BMP.
sediment storage
Erosion has occurred
Provide additional erosion protection such as reinforced turf matting or
riprap if needed to prevent future erosion problems
Weeds are present
Remove the weeds, preferably by hand. If pesticide is used, wipe it on
the plants rather than spraying.
The vegetated shelf
Best professional practices
Prune according to best professional practices
show that pruning is needed
to maintain optimal plant
health.
Plants are dead, diseased or
Determine the source of the problem: soils, hydrology, disease, etc
dying
Remedy the problem and replace plants Provide a one-time fertilizer
application to establish the ground cover if a soil test indicates it is
necessary
Weeds are present
Remove the weeds, preferably by hand. If pesticide is used, wipe it on
the plants rather than spraying.
ECEIVE
MAY 12 2017
8
BY:
STORM-EZ 5/112017
Version 1 4 O&M Manual Page 2 of 4

I Wet Detention Pond Maintenance Requirements (Continued) I
The main treatment area
Sediment has accumulated to
Search for the source of the sediment and remedy the problem If
a depth greater than the
possible Remove the sediment and dispose of it In a location where it
original design sediment
will not cause impacts to streams or the BMP.
storage depth.
Algal growth covers over 50%
Consult a professional to remove and control the algal growth.
of the area
Cattails, phragmites or other
Remove the plants by wiping them with pesticide (do not spray).
Invasive plants cover 50% of
the basin surface.
The embankment
Shrubs have started to grow
Remove shrubs immediately
on the embankment.
Evidence of muskrat or
Use traps to remove muskrats and consult a professional to remove
beaver activity is present
beavers
A tree has started to grow on
Consult a dam safety specialist to remove the tree.
the embankment.
An annual Inspection by an
Make all needed repairs
appropriate professional
shows that the embankment
needs repair (if applicable)
The outlet device
Clogging has occurred.
Clean out the outlet device Dispose of the sediment off -site.
The outlet device Is damaged
Repair or replace the outlet device.
The receiving water
Erosion or other signs of
Contact the local NC Department of Environment and Natural
damage have occurred at the
Resources Regional Office
outlet
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.
�ECF-IO t1N lC
MAY 1 2 2017
BY:
STORM-EZ 5/11/2017
Version 1 4 O&M Manual Page 3 of 4

Wet Detention Pond Design Summary
Wet Pond Diagram
WET POND ID FOREBAY MAIN POND
SW8 970128 Permanent Pool El 24 00 Permanent Pool EL 24 00
Temporary Pool El 25 30 Temporary Pool El 25 30
Pretreatment otherPNq.
Clean Out Depth: 5 Clean Out Depth' 7
Nan forebay? Sediment Removal El 19.00 Sediment Removal El' 17 00
Has Veg Filte(� Bottom Elevation 18.00 Bottom Elevation 16 00
c rEll
MAY 3 1 201:1
BY:
STORM-EZ 513012017
Version 1 4 O&M Manual Page 4 of 4

Permit Number: S%lj-3`t -7012e !'t or/
(to be provided by Dft'Q)
Drainage Area Number:
Wet Detention Basin Operation and Maintenance Agreement
I will keep a maintenance record on this BMP. This maintenance record will be kept in a
log in a known set location. Any deficient BMP elements noted in the inspection will be
corrected, repaired or replaced immediately. These deficiencies can affect the integrity
of structures, safety of the public, and the removal efficiency of the BMP.
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
This system (check one):
® does ❑ does not
incorporate a vegetated filter at the outlet.
incorporate pretreatment other than a forebay.
Important maintenance procedures:
— Immediately after the wet detention basin is established, the plants on the
vegetated shelf and perimeter of the basin should be watered twice weekly if
needed, until the plants become established (commonly six weeks).
— No portion of the wet detention pond should be fertilized after the first initial
fertilization that is required to establish the plants on the vegetated shelf.
— Stable groundcover should be maintained in the drainage area to reduce the
sediment load to the wet detention basin.
— If the basin must be drained for an emergency or to perform maintenance, the
flushing of sediment through the emergency drain should be minimized to the
maximum extent practical.
— Once a year, a dam safety expert should inspect the embankment.
After the wet detention pond is established, it should be inspected once a month and
within 24 hours after every storm event greater than 1.0 inches (or 1.5 inches if in a
Coastal County). Records of operation and maintenance should be kept in a known set
location and must be available upon request.
Inspection activities shall be performed as follows. Any problems that are found shall
be repaired immediately.
BMP element:
Potentialproblem:
How I will remediate theproblem:
The entire BMP
Trash debris is present.
Remove the trash debris.
The perimeter of the wet
Areas of bare soil and/or
Regrade the soil if necessary to
detention basin
erosive gullies have formed.
remove the gully, and then plant a
ground cover and water until it is
established. Provide lime and a
one-time fertilizer application.
Vegetation is too short or too
Maintain vegetation at a height of
long.
approximately six inches.
Form S W401-Wet Detention Basin O&M-Rev.4 Page I of 4

Permit Number:
(to be provided by DIVA)
Drainage Area
BMP element:
Potentialproblem:
How I will remediate theproblem:
The inlet device: pipe or
The pipe is clogged.
Unclog the pipe. Dispose of the
swale
sediment off -site.
The pipe is cracked or
Replace the pipe.
otherwise damaged.
Erosion is occurring in the
Regrade the swale if necessary to
swale.
smooth it over and provide erosion
control devices such as reinforced
turf matting or riprap to avoid
future problems with erosion.
The forebay
Sediment has accumulated to
Search for the source of the
a depth greater than the
sediment and remedy the problem if
original design depth for
possible. Remove the sediment and
sediment storage.
dispose of it in a location where it
will not cause impacts to streams or
the BMP.
Erosion has occurred.
Provide additional erosion
protection such as reinforced turf
matting or riprap if needed to
prevent future erosion problems.
Weeds are present.
Remove the weeds, preferably by
hand. If pesticide is used, wipe it on
the plants rather than s ra in .
The vegetated shelf
Best professional practices
Prune according to best professional
show that pruning is needed
practices
to maintain optimal plant
health.
Plants are dead, diseased or
Determine the source of the
dying.
problem: soils, hydrology, disease,
etc. Remedy the problem and
replace plants. Provide a one-time
fertilizer application to establish the
ground cover if a soil test indicates
it is necessary.
Weeds are present.
Remove the weeds, preferably by
hand. If pesticide is used, wipe it on
the plants rather than spraying.
The main treatment area
Sediment has accumulated to
Search for the source of the
a depth greater than the
sediment and remedy the problem if
original design sediment
possible. Remove the sediment and
storage depth.
dispose of it in a location where it
will not cause impacts to streams or
the BMP.
Algal growth covers over
Consult a professional to remove
50% of the area.
and control the algal growth.
Cattails, phragmites or other
Remove the plants by wiping them
invasive plants cover 50% of
with pesticide (do not spray).
the basin surface.
Form SW401-Wet Detention Basin O&M-Rev.4 Page 2 of 4

Permit Number:
(to be provided by DWQ)
Drainage Area Number:
BMP element:
Potentialproblem:
How I will remediate theproblem:
The embankment
Shrubs have started to grow
Remove shrubs immediately.
on the embankment.
Evidence of muskrat or
Use traps to remove muskrats and
beaver activity is present.
consult a professional to remove
beavers.
A tree has started to grow on
Consult a dam safety specialist to
the embankment.
remove the tree.
An annual inspection by an
Make all needed repairs.
appropriate professional
shows that the embankment
needs repair. if applicable)
The outlet device
Clogging has occurred.
Clean out the outlet device. Dispose
of the sediment off -site.
The outlet device is damaged
1 Repair or replace the outlet device.
The receiving water
Erosion or other signs of
Contact the local NC Division of
damage have occurred at the
Water Quality Regional Office, or
outlet.
the 401 Oversight Unit at 919-733-
1786.
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 5 feet in the main pond, the sediment
shall be removed.
When the permanent pool depth reads 5 feet in the forebay, the sediment shall
be removed.
Sediment Removal
Bottom
BASIN DIAGRAM
(fill in the blanks)
Permanent Pool Elevation 26.0
21.0 i Pe anen Pool
------------------ Volume Sediment Removal Elevation 21.0 Volume
20.0 -ft Min.
----------------- ----------- - ------------ ------
Sediment Bottom Elevation 20.0 I-ft n
Storage Sedimet
Storage
FOREBAY MAIN POND
Form SW401-Wet Detention Basin O&M-Rev.4 Page 3 of 4

Permit Number: �w It k� 2 0 H
(to be provided by D[VQ)
I acknowledge and agree by my signature below that 1 am responsible for the
performance of the 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.
Project name:UNCW Privatized Housing, Honors Housing & International Housing
BMP drainage area number:
Print
Title:Vice Chancelor of Business Affairs
Address:601 S. College Road, Wilmington, NC 28403-5918
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.
1, �`Setne� F. Al-e-yncler a Notary Public for the State of
Aebra (nam 1;,AQ , County of AJe-IA1 t!4al yt621t r , do hereby certify that
eA40L't D gai r -Ae— personally appeared before me this I
day of LI_eeVft er , _gyp 9-, and acknowledge the due execution of the
wet detention basin aintenance requirements. Witness my hand and official
SEAL
My commission expires Zd'e
Form SW401-Wet Detention Basin O&M-Rev.4
Page 4 of 4

Pernil No.s� D f-7el z " "rov
(to be promdad by DWQ)
®gin
NCDENR
Project name
Contact person
Phone number
Date
Drainage area number
STORMWATER MANAGEMENT PERMIT APPLICATION FORM
401 CERTIFICATION APPLICATION FORM
WET DETENTION BASIN SUPPLEMENT
This form must be filled out, printed and submitted.
The Required Items Checklist (Part III) must be printed, filled out and submitted along with all of the required information.
John S. Tunslall. P.E.
o�aF WArF,9OG
� r
s
Energy Plant `v Sf�]IJ-
�, 1 ; ._, ,.,.,.,...,y ,. r- ..... .... . . ....
IL':DESIGN,INFORMATION
Site Characteristics J
Drainage area 1,340,472 fte i 1,
Impervious area, post -development 444,223 fe y�l1 ) a � S� � + 106 Sf
%impervious 33.14 %
Design rainfall depth 1 & 1.5 in
Storage Volume: Non -SA Waters
Minimum volume required
Volume provided
Storage Volume: SA Waters
1.5'runoR volume
Pre -development 1-yr, 24-hr runoff
Post -development 1-yr, 24-hr runoff
Minimum volume required
Volume provided
Peak Flow Calculations
Is the pre/post control of the lyr 24hr storm peak flow required?
1-yr, 24-hr rainfall depth
Rational C, pre -development
Rational C, post -development
Rainfall intensely: 1-yr, 24-hrstomr
Pre -development 1-yr, 24-hr peak flow
Post -development 1-yr, 24-hr peak flow
PmAPost 1-yr, 24-hr peak flow control
Elevations
Temporary pool elevation
Permanent pool elevation
SH Wr elevation (approx. at the perm, pool elevation)
Top of 10ft vegetated shelf elevation
Bottom of 10ft vegetated shelf elevation
Sediment cleanout. top elevation (bottom of pond)
Sediment cleanout, bottom elevation
Sediment storage provided
Is there additional volume stored above the stale -required temp. pool?
Elevation of the top of the additional volume
Fom1 SW401-Wet Deternon easn-Rev 5
40,886 ft3
79.638 ft3
N/A ft3
N/A ft3
N/A ft3
#VALUE! rya
WA ft3
>a�14BS CF t 311A ALUE�I s1t1i2°FT ='f0)%759 CF
i, Do NOT fill out BOTH Non -SR and SR data
T OK, volume provided is equal to or in excess of volume required.
N/A (Y or N)
NIA in
N/A (unifless)
N/A (umfless)
NIA irdhr
N/A ft3lsec
N/A ft/sec
#VALUE!fOla
2740 fmsl
26.00 first i
N/A first
N/A fmsl ir-
N/A fmsl
21.00 fmsl
20.00 fmsl
1.00 It
N (Y or N)
N/A first
NL-
#REFI
#REF!
Do NOT fill out BOTH Non -SA and SA data.
#VALUE!
#VALUEI
%cmitt`ta*�-i
MAR 1.1 2009
Insufficient. Must equal the temp. pool elev, previously entered.
ivrm(� S,Wq m oO
Parts I & 11 Design Summary, Page 1 of 2

Permit No SW9 971)12% MOD
(roW provded by DWo)
II:S�DESIGN INF,ORMATIOW.
Surface Areas
Area, temporary pod
Area REQUIRED, permanent pool
SAIDA ratio
Area PROVIDED, permanent pool, A._,,
Area, bottom of 10ft vegetated shelf, Ate, mar
Area, sediment cleanout, lop elevation (bottom of pond), A,.,o
Volumes
Volume, temporary pool
Volume, permanent pool, V.-,d
Volume, forebay (sum of forebays if more than one fambay)
Forebay %of permanent pool volume
SAIDA Table Data
Design TSS removal
Coastal SAIDA Table Used?
Mountain/Piedmont SAIDA Table Used?
SAIDA ratio
Average depth (used in SAIDA table):
Calculation option 1 used? (See Figure 10-2b)
Volume, permanent pool, Vp -Pw
Area provided, permanent pool, Av _pw
Average depth calculated
NIA ft
23,592 f?
176 (unidess)
k2-27'S%J2%.� OK
'NIA ft'
NIA It
79,638 ft'
243.176 ft3
58.631 ft' "*
24 1% %
90 %
Y (Y or N)
N (Y or N)
1.76 (unifless)
Insufficient forebay volume.
#VALUE!
N/A (Y or N)
NIA ff' Insufficient. Does not equal data previously entered
NIA fl
N/A ft
Average depth used in SAIDA. da, (Round to nearest 0.5ft)
N/A
it
Calculation option 2 used? (See Figure 10-2b)
NIA
(Y or N)
Area provided, permanent pod, Av,,,,,ym
N/A
ft
Area, bottom of 10tt vegetated shelf, Am a
NIA
ft
Area, sediment cleanout, top elevation (bottom of pond), A,,. a
N/A
flv
'Depth" (distance blw bottom of 10ft shelf and top of sediment)
N/A
It
Average depth calculated
N/A
It
Average depth used in SAIDA, d., (Round to nearest 0.54)
N/A
It
Orawdown Calculations
Drawdown through orifice?
Diameter of orifice (if circular)
Area of orifice (d-rlonciroular)
Coefficient of discharge (CD)
Driving head (Ho)
Drawdown through weir?
Weir type
Coefficient of discharge (C„)
Length of weir (L)
Driving head (H)
Pre -development 1-yr, 24-hr peak flow
Post -development 1-yr, 24-hr peak flow
Storage volume discharge rate (through discharge office or weir)
Storage volume drawdown time
Additional Information
Vegetated side slopes
Vegetated shelf slope
Vegetated shelf width
Length of flowpath to width ratio
Length to width ratio
Trash rack for overflow & orifice?
Freeboard provided
Vegetated filter provided?
Recorded drainage easement provided?
Capures all runoff at ultimate build -out?
Drain mechanism for maintenance or emergencies
Y
(Y or N)
3.00 in
NIA in'
0.00 (unidess)
1.24 ft
N
(Y or N)
N/A
(unitless)
NIA
(undless)
N/A
It
N/A
If
N/A ft3/sec
N/A ft3/sec
0.20 ft'Isec
Insufficient. Data does not equal data previously entered.
#VALUE!
#VALUE!
Insufficient. Data does not equal data previously entered.
OK
#VALUE!
#VALUEI
#VALUE!
Enter either diameter of orifice or area of non -circular onfice. Do not enter
both diameter and area for a circular office.
#VALUEI
#VALUEI
4.66 days 'I;, OK, draws down in 2-5 days.
#VALUE!
3 :1
NIA :1
NIA ft
3 :1 k
1.5 :1 V
Y
(Y or N)
0.6ft t
N
(Y or N)
Y
(Y or N)
Y
(Y or N)
OK
OK
OK
OK
OK
OK
Insufficient freeboard, minimum of 1-ft required
OK
OK
OK
Fonn SW401-Wet Detention Ba.amRev.S Parts I & 11 Design Summery, Page 2 of 2

Permit No. 5w 1176129 M o)
(to be provided by DWQ)
III. REQUIRED ITEMS CHECKLIST
Please indicate the page or plan sheet numbers where the supporting documentation can be found. An incomplete submittal package will
result in a request for additional information. This will delay final review and approval of the project. Initial in the space provided to
indicate the following design requirements have been met. If the applicant has designated an agent, the agent may initial below. If a
requirement has not been met, attach justification.
Pagel Plan
Initi Is
Sheet No.
1.
Plans (1" - 50' or larger) of the entire site showing:
Design at ultimate build
-Off-site drainage (if applicable),
Delineated drainage basins (include Rational C coefficient per basin),
'
Basin dimensions,
Pretreatment system,
High flow bypass system,
Maintenance access,
Proposed drainage easement and public right of way (ROW),
Overflow device, and
t
_►Nr��jl �j_i_ 2.
- Boundaries drainage easement.
plan n (1" = 30' or larger) and details for the wet detention basin showing:
Partiall plan
- Outlet structure with trash rack or similar,
- Maintenance access,
- Permanent pool dimensions,
- Forebay and main pond with hardened emergency spillway,
- Basin cross-section,
- Vegetation specification for planting shelf, and
3.
- Filter strip.
Section view of the wet detention basin (V = 20' or larger) showing:
- Side slopes, 3:1 or lower,
p
4.
- Pretreatment and treatment areas, and
-Inlet and outlet structures.,A/*iflt
If the basin is used for sediment and erosion control during construction, clean out of the basin is specified
5.
on the plans prior to use as a wet detention basin.
A table of elevations, areas, incremental volumes & accumulated volumes for overall pond and for Forebay,
t l�
ILL
to volume provided.
t�l�l
6.
A construction sequence that shows how the wet detention basin Will be protected from sediment until the
A oas
��
entire drainage area is stabilized.
U� 7.
The supporting calculations.
�.
9.
A copy of the signed and notarized operation and maintenance (O&M) agreement.
A copy of the deed restrictions (if required).
10.
A soils report that is based upon an actual field investigation, soil borings, and infiltration tests. County
soil maps are not an acceptable source of soils information.
Form SW401-Wet Detention Basin-Rev.5 Part III Required Items Checklist, Page 1 of 1

Permit'l 9' /�� 6
(to be provided by Dl
of gW n TE9
� O� PG
NCDENR
STORMWATER MANAGEMENT PERMIT APPLICATION FORM
401 CERTIFICATION APPLICATION FORM
WET DETENTION BASIN SUPPLEMENT
This form must be filled out, printed and submitted
The Required Items Checklist (Part 1/1) must be punted, filled out and submitted along with all of the required information.
. P.ROJECT.INFORMATION .
Project name UNCW Pnvatized Housing, Honors Housing & International Housing
Contact person Steve Thomas, PE, LEED AP
Phone number 910-343-1048
Date 6-Oct-2008
Drainage area number 1
IIaOESIGN'INFORMATION_
Site Characteristics
Drainage area
1,340,47200
ftz
Impervious area
441,01700
ft'
% impervious
3290
%
Design rainfall depth
1 & 15 -
in
Storage Volume: Non -SR Waters
Minimum volume required
40,48500
rya
Volume provided
79,638.00
fl3
Storage Volume: SR Waters
1-yr, 24-hr runoff depth
in
Pre -development 1-yr, 24-hr runoff
ft3
Post -development 1-yr, 24-hr runoff
ft3
Minimum volume required
ft3
Volume provided
fl3 '
Peak Flow Calculations
1-yr, 24-hr rainfall depth
in
Rational C, pre -development
limitless)
Rational C, post -development
(unitless)
Rainfall intensity 1-yr, 24-hr storm
in/hr
Pre -development 1-yr, 24-hr peak flow
ft3/sec
Post -development 1-yr, 24-hr peak flow
ft3/sec
Pre/Post 1-yr, 24-hr peak flow control
fl3/sec
Basin Elevations
Basin bottom elevation
20.00 -
ft
Sediment cleanout elevation
21.00
ft
Bottom of shelf elevation
N/A
ft
Permanent pool elevation
2600
it
SHWT elevation
N/A
It
Top of shelf elevation
N/A
ft
Temporary pool elevation
2740
ft
Forth SW401-Wet Detention Basin -Rev 4 Pans I & II. Design Summary, Page 1 of 2

Permit No.
(to be provided by DWQ)
II. DESIGN INFORMATION
Volume and Surface Area Calculations
SA/DA ratio
1.75
(unitless)
Surface area at the bottom of shelf
N/A
ftZ
Volume at the bottom of shelf
NIA
ft3
Permanent pool, surface area required
23,694.00
fe
Permanent pool, surface area provided
52,127.00
ft'
OK
Permanent pool volume
Average depth for SA/DA tables
243,176.00 ft'
-44i� ft
]
/�
OK (fl,SC,OL Le, 'FVOWN
Surface area at the top of shelf
N/A
ff
•J
'9 tA.Y'�►2.v►�?iv'S
Volume at the lop of shelf
N/A
ff'
Forebay volume
58,631.00
fl'
Forebay % of permanent pool volume
24.11
%
Must be approx. 20%, Adjust pond dimensions
Temporary pool, surface area provided
N/A
ft'
Drawdown Calculations
Treatment volume drawdown time
4.66
days
OK
Treatment volume discharge rate
0.20
ft'Is
Pre -development 1-yr, 24-hr discharge
ft'Is
Post -development 1-yr, 24-hr discharge
ft3Is
Additional Information
Diameter of orifice
3
in
Design TSS removal
90
%
Basin side slopes
3.00
:1
OK
Vegetated shelf slope
N/A
:1
OK
Vegetated shelf width
NIA
ft
OK
Length of flowpalh to width ratio
3.00
1
OK
Length to width ratio
150
:1
OK
Trash rack for overflow & orifice?
Y
(Y or N)
OK
Freeboard provided
060
ft
Not enough freeboard, minimum of i-ft required
Vegetated filter provided?
N
(Y or N)
Design must be based on 90% TSS removal
Recorded drainage easement provided?
Y
(Y or N)
OK
Capures all runoff at ultimate build -out?
Y
(Y or N)
OK
Drain mechanism for maintenance or emergencies
Form SW401-Wet Detention Basin-Rev.4 Parts I & 11 Design Summary, Page 2 of 2

Permit
(to be provided by D WQ)
1IL REQUIREWTEMS CHECKLIST
Please indicate the page or plan sheet numbers where the supporting documentation can be found. An incomplete submittal package will
result in a request for additional information. This will delay final review and approval of the project. Initial in the space provided to
indicate the following design requirements have been met. If the applicant has designated an agent, the agent may initial below. If a
requirement has not been met, attach justification.
Pagel Plan
Initials Sheet No.
N l�-i.�. • 1
Plans (1" - 50' or larger) of the entire site showing:
- Design at ultimate build -out,
Off -site drainage (if applicable),
- Delineated drainage basins (include Rational C coefficient per basin),
- Basin dimensions,
- Pretreatment system,
- High Flow bypass system,
- Maintenance access,
- Proposed drainage easement and public right of way (ROV),
Overflow device, and
Boundaries of drainage easement.
2. Partial plan (1" = 30' or larger) and details for the wet detention basin showing:
- Outlet structure with trash rack or similar,
- Maintenance access,
Permanent pool dimensions,
Forebay and main pond with hardened emergency spillway,
- Basin cross-section,
- Vegetation specification for planting shelf, and
- Filter strip.
3. Section view of the dry detention basin (1" = 20' or larger) showing.
- Side slopes, 3:1 or lower,
- Pretreatment and treatment areas, and
- Inlet and outlet structures.
If the basin Is used for sediment and erosion control during construction, clean out of the basin is specified
on the plans prior to use as a wet detention basin.
5. A table of elevations, areas, incremental volumes & accumulated volumes for overall pond and for forebay,
to verify volume provided.
6. A construction sequence that shows how the wet detention basin will be protected from sediment until the
NIL E44s-� ,
entire drainage area is stabilized.
The supporting calculations.
NI -A FA %S�' • 8. A copy of the signed and notarized operation and maintenance (0&M) agreement.
9. A copy of the deed restrictions (if required).
WA10. A soils report that is based upon an actual field investigation, soil borings, and infiltration tests. County
soil maps are not an acceptable source of soils information.
Form SW401-Wet Detention Basin -Rev 4 Part III Required Items Checklist, Page 1 of 1

SUPPLEMENT-EZ FORM COVER PAGE
Please indicate the types, quantities and locations of SCMs that will be used on this project:
Quantity
Location(s)
Infiltration System
Bioretention Cell
Wet Pond
1
See Plans
Stormwater Wetland
Permeable Pavement
Sand Filter
Rainwater Harvesting
Green Roof
Level Spreader -Filter Strip
Disconnected Impervious Surface
Treatment Swale
Dry Pond
Designer information for this project:
Name and Title:
T. Jason Clark, P.E.
Organization:
Norris & Tunstall Consulting Engineers, P.C.
Street address:
902 Market Street
City, State, Zip:
Wilmington, NC 28401
Phone number(s):
910-343-9653
Email:
jclark@ntengineers com
Designer
SEAL '
;S;69
e*�.
✓gS0N
�
Si6nature`brDb<Igner
Date
Applicant:
En4rvnmer
Qu.Iq
21
Pro'ect Name:
UNC Wilmington - Honors, International,
Privatized Housin &Associated Parkin
Address
Walton Dr. & Community Dr. on UNCW Campus
City / Town
Wilmington
Company:
University of North Carolina - Wilmington
Contact:
Mark D. Morgan, Associate Vice Chancellor for Business Affairs - Fac
Mailing Address:
601 S. College Road
City, State, Zip:
Wilmington, NC 28403
Phone number(s):
910-962-3719
Email
[e-mail]
Certification Statement:
I certify, under penalty of law: that this Supplement-EZ form and all supporting
information were prepared under my direction or supervision;
- that the information provided in the form is, to the best of my knowledge
and belief, true, accurate, and complete; and
that the engineering plans, specifications, operation and maintenance
agreements and other supporting information are consistent with
the information provided here.
I am aware that there are significant penalties for submitting false
information including the possibility of fines and imprisonment for knowing
violations as well as a report being made to my professional board
rJ
F-OVEUL302010
Cover Page 1 12:32 PM 7/3/2018

WET POND
11 k\� . W � Imington - Honors International & Privatized Housing & Associated Parking
THE DRAINAGE AREA1
gramage area number
#1
Break down of BUA In the drainage area (both new and existing):
Total coastal wetlands area (sq it)
0 SF
- Parking I driveway (sq ft)
78715 sf
Total surface water area (sq it)
0 SF
- Sidewalk (sq ft)
9823 sf
Total drainage area (sq ft)
14575H at
- Roof lag ft)
0 SF
BUA associated with existing development (sq ft)
605264 sf
- Roadway (sq ft)
0 SF
Proposed new BUA (sq ft)
1735W at
- Other, please specify in the comment box below (sq ft)
690264 sf
Percent BUA of drainage area
5
Total BUA (sq ft)
778802 sf
COMPLIANCE WITH THE APPLICABLE STORMWATER PROGRAM
Stormwater program(s) that apply (please spei )
IDesign rainfall depth (in)
t.0" t 1.5'
1995 Rules, Session Lew 2006-246, Session Law 2008-211, and 2017 rules
livinumun, volume required (cu ft)
76808 cf
Design volume of SCM (cu th
77182 cf
GENERAL MDC FROM 02H .1050
#1 Is the SCM sized to treat the SW from all surfaces at build -out?
Yes
#7 If applicable, with the SCM be cleaned out after construction?
Yes
#2 Is the SCM located on or near contaminated soils?
No
#8 Does the mameeenance access comply with General MDC (8)?
Yes
3 What are the side slopes of the SCM (H V)?
3:1
#9 Does the drainage easement comply with General MDC 9)?
Yes
#3 Does the SCM have retaining walls, gablon walls or other engineered side slopes?
No
#10 If the SCM is on a single family lot, does the plat comply with General MDC 10 7
#4 Are the inlets, outlets, and receiving stream protected from erosion (10-year storm)?
Yes
#11 Is there an O&M Agreement that complies will General MDC (11)?
Yes
#5 Is there a a bypass for flows In excess of the design flow?
Yes
#12 Is there an O&M Plan that compiles with General MDC 12 ?
Yes
#6 What Is the method for dewatedng the SCM for maintenance?
Drawdown Orifice
#13 Was the SCM designed by an NC licensed professional?
Yes
WET POND MDC FROM 02H .1053
#1 Method used
SA/DA
#8 Width of the vegetated shelf (feet)
6 If
#1 Surface area of the main permanent pool (square feet)
42669 sf
#6 Location of vegetated shelf
Q Normal Pool
91 Volume of the main permanent pool (cubic feet)
231535 cf
#6 Elevation of top of shelf (fmsl)
24 5 FT
2 Average depth of the main pool feet)
5.43 FT
#6 Elevation of bottom of shelf (fms0
23.5 FT
#2 Was the vegetated shell included In the calculation of average depth?
Yes
#6 Slope of vegetated shelf (H:
6.1
#2 Elevation of the bottom of the permanent pool (fmsl)
loft
#7 Diameter of drawdown orifice Inches
5 0 in
#2 Elevation of the top of the permanent pool (fmsl)
24 ft
#7 Drawdown time for the temporary pool hours
6048 HRS
#2 Elevation of the top of the temporary pool (fmsl
25.3 FT
#7 Does the orifice drawdown from below the top surface of the permanent poop
Yes
#3 Depth provided for sediment storage inches
121n
#8 Does the pond minimize impacts to the receiving channel from the 1-yr, 24-hr storm?
Yes
#4 Are the Inlet s) and outlet located in a manner that avoids short-circuiting?
Yes
#9 Are fountains proposed?
No
Describe any measures, such as berms or baffles, that will be taken to improve the flow path.
#9 If yes, Is documentation provided per Wet Pond MDC (9)?
A forebay weir spillway is located between the forebay & main pool to increase the flow path from inlet to outlet.
#10 Is a trash rackor other dewce provided to protect the outlet system?
Ves
#5 Volume of the forebay (cubic feet)
43780
#11 Are the dam and embankment planted in non -clumping turf grass?
Yes
#5 Is this 15-20% of the volume in the mainpool?
Yes
#11 Species of turf that will be used on the dam and embankment
Bermuda Grass
#5 Depth of forebay, at entrance (Inches)
72 in
011 Describe the planting plan for the vegetated shell:
#5 Depth of foretbary at exit inches
60 in
The vegetated sheff wll be planted wllh three species above NP: Blue Switch Grass (Panicum Virgatum). Quill Sedge
(Carex Tenem), and Swamp Milkweed (Asclepias Incarnate). Below NP, three species unit be planted Cardinal Flower
(Labelle Cardin llis), Lizard's Tail (Saururus Cemuus), & Southern Blue Flag Ins (Iris Virgimca) All species volt be planted at
24" OC at a minimum density of 50 plants per 200 SF.
5 Does water flow out of the foreba in a non-erosNe manner?
#5 Clean -out depth for forebay (inches)
Yes
601n
#5 Wlt the foreba be cleaned out when the tle m Is retlucad to as than the above?
Yes
ADDITIONAL INFORMATION
Please use this space to provide any additional Information about this wet pond that you mink Is relevant to the review:
Other BUA area includes existing Impervious 605,264 SF & future impervious allowance of 85,000 SF for a total of 690,264yySFF. �\ ���yyr 9pppp IqqIqq����
IE {,.I IIIe I V E
JUL 3p2013
Wet Pond 1 12:28 PM 7/3/2018

SUPPLEMENT-EZ FORM COVER PAGE
Please indicate the types, quantities and locations of SCMs that will be used on this project:
Quantity
Location(s)
Infiltration System
Biorelention Cell
Wet Pond
1
UNCW Campus - Adjacent to Community Drive
Stormwater Wetland
Permeable Pavement
Sand Filter
Rainwater Harvesting
Green Roof
Level Spreader -Filter Strip
Disconnected Impervious Surface
Treatment Swale
Dry Pond
Designer information for this project:
Name and Title:
Cory George, PE, PLS
Organization.
McAdams
Street address:
29050 Meridian Parkway
City, State, Zip
Durham, NC 27713
Phone number(s)
361-5000
Email.
[e-mail]
Designer
N
Sign a F1 signer
4* r
Applicant:
E'nnn»nrr t:
Project Name:
UNCW - Parking Improvements
Address
Walton Drive and Community Drive - Wilmington, NC
28403
City / Town
Wilmington
Company:
UNC Wilmington
Contact:
Mark Morgan/Associate Vice Chancelor for Business Affairs
Mailing Address:
601 S. College Road
City, State, Zip'
Wilmington, NC 28403
Phone number(s) '
[phone] Fax [phone]
[e-mail]
Email:
Certification Statement
I certify, under penalty of law: that this Supplement-EZ form and all supporting
information were prepared under my direction or supervision,
- that the information provided in the form is, to the best of my knowledge
and belief, true, accurate, and complete; and
that the engineering plans, specifications, operation and maintenance
agreements and other supporting information are consistent with
the information provided here.
I am aware that there are significant penalties for submitting false
information including the possibility of fines and imprisonment for knowing
violations as well as a report being made to my professional board
MAY 3 1 9.0'V
Cover Page 1 12:40 PM 5/30/2017

WET POND
UNCW - PaTICIfID Irrorovements
THE DRAINAGE AREA
-
1
Dribrape area number
1
Beak down of BOA in Me drainage area (both now and extstmg)^ _ —
Total coastal wetlands area (sq ft)
- Parking I driveway (sq fl)
sf
Taal s.daGr water area (sq ff)
_78715
• Sidewalk (sq t) _
9823 sf
Towl drainage area (sq In
14BOI 14 sf
- Roof (sq II)
BOA associated with existing development (sq t)
605264 of
• Roadway I, n)
Proposed new BUA (aq h)
173538 sf
-Omer, please specity in the comment box bola? Isq fry
690284 sf
Percent BUA of drainage area
S2.62%
Total BUA (sq R)
778802 at
COMPLIANCE WITH THE APPLICABLE STORMWATER PROGRAM
Storrrhwater pmgmngs) that appN (please specs )
Design rainfall depth (in) "_ �' -
1D' / 1.5'
1995 Rules. Session Law 20D6.246. Session Law 2008-211. am! 2017 rules
Minimum volume required (cu t)�
76950 0
Design volume of SCM (cu 0) —�
77182 ct
GENERAL MDC FROM 02111.1050 -
-
-
91 Is the SCM sued to treat the SW from as sudaces at beldi _
Yes _
077 If applicable, with the SCM be claimed out alter constructor? #
Yes
02 Is the Si located on ce near contaminated sots?
No
OB Does the mamelenanre access comPly weh General MOO 8 ?
Ves
03 What are the Side slopes of the SCM (H.V)?
3.1
49 Does the drainage easement comply with General MDC (9)1
03 Does the SCM have lele min evens, veils, gablon walls or other englinemed side slopes?
No
#10 It the SCM is on a sin le family lot, does the plat comply with General MDC I D ?
04 Are the mots, outlets, and receiving stream Protected from erosion (I0.yeer storm)?
Yes
411 Is there an OAM AK2ff22nl that cemphas?loth Cenral MDC (111?
Yes
05 Is there a a bypass for Mows m excess of the design toi
Yes
--{t _
412 Is there an 01 Plan that comphes in General MDC (12)? I
Yes
06 What is the method for aewatenng the SCM for maintenance?
Drawdown Orifice
413 Was the Si desl rid by an NC licensed professional? I
Yes
WET POND MDC FROM 02H:1053'- - - -"--
_
01 Method used _ - _
_ SAJDA
46 Width of the vedelalea shelf (feet) __t
Sit
01 Surface area of me main permanent pool (square tea) _
_ 42fi69 sf
46 Locatron of vegetated shell ) ® Normal Pool
01 Volume of the main permanent pool (cubic feel) _ _ _ _
2315350
#6 Elevation of lop of shelf rmsO " . _ _ _ _
24,5 It
02 Average depth of the main pool (lees
5.43 it
46 Elevation of bottom of shelf frost
23511 _
02 Was tie vegetated shell included in the cafcdetldn of average depth?
Yes
46 Slope of vegetated shelf (H.V), E
61
a2 Elevation of the bottom re the permanent Pool fmsl
16,0 it
47 Diameter of <yawxtovm onfloe (socriesl
5.0 ur
02 Eo at on of the top of me pemmment p2aLlfimst _ ._ _ _ _ _ _ _
_ _ 24.01t _
47.Drawdoym time for the temporary pool (hours)
60 48 hr.
02 Elevation of the top of me tempos pool (ims0
25.3 n
47 Does the onfice drawdown from below the lop surface of the permanent pool? I'
Yes
tl3 Depth Fronded for sediment storag!�mches _ _ _
12.00
48 Does the pond menow a impacts to Ire receiving channl fmm the 1 yr. 24 hr storm?
Yes
N4 Are the inlet 5 and outlet located In a manner that avoids slrod Grdudib�? _
_ _ _Yee _
49 No fountains proposed? f
NO
P4 Deri arty measures, such as berms or baffles that mil be taken to improve the flow Fam
99 If yes. is documentation provided per Wet Pond MDC (9)?
A forebay weir spillway is located between the forebay and main pool to increase the now path from inlet to outlet.
010 Is o trash rack or other device provided to protect the outlet system?
Yes
d5 Volume of the foreba cubic feet
43780
411 Are me dam and embankment planted in non-dump6ig turf grass? '
Yes
5 Is this 15.20%of the volume in the main pool _
Yes
#11 Somas of thud that MN be used on the dam and embankment I Common eerrr a vA
d5 Depth of forebay at entrance pnOiest
72.
41 t Describe die planting plan for the vegetated shelf.
95 Depth of tomboy at exit (inches)
60 in
The vegetated short mil the pianled win three species above NP Blue Switch Glass (Parecum Virgatum). Qwk Sedge
(Care%Tenem), and Swamp Mdkweed (Astlepias Imamate), Below NP, three species veil be panted Cardinal dower
(Lobelia Caranialts). Lizard's Tail (Saturnine Cemuus), and Southern Due Flag Ins (Ins Wgmrcai All spectres will be
planted et 2a• OC at a mimmum density of 50 pains per 200 sf.
d5 Does water Ilow out of the forebay In a non erosive marmot+
Yes
5 Cleam-oul depth for tore mcnos
60 m
#5 Will the tomboy be cleaned out when the depth is reduced to less than the above?
Yes
ADDITIONAL INFORMATION.
Please use tvs spacem Provide any addtimal informatmn alwut Nis wet pond that you think is relevant to the review
_ _.._ ..__ _
........
Other BUA area Includes existing impervious 605,264 sit and future impoNsms allowance of 85p0 sf for a total of 690.264 sL -
JUN 13 Z®17
Wet Pond 2 5.22 PM 6/13/7017

Permit No. ?012 i3
(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.
I. PROJECT INFORMATION
Project Name: UWLW zoo( PRI✓47-/zeo l-Icvsl,v` d, (IoNORs d INTEKN9TlON/tL Hates„ 6-
Contact Person: navio fs'r�YCTTE Sre-,,4 .r C ts, Phone Number: (9l0t ) 3SV- 9$71570 rxJ-1&&
For projects with multiple basins, specify which basin this worksheet applies to: /)f lq
elevations
Basin Bottom Elevation 20•0o ft. (floor of the basin)
Permanent Pool Elevation 26,0 o ft. (elevation of the orifice)
Temporary Pool Elevation 2(0. (o S ft. (elevation of the discharge structure overflow)
areas
Permanent Pool Surface Area S 2 1 27 sq. ft. (water surface area at the orifice elevation)
Drainage Area 1.8. f2P3 ac. (on -site and off -site drainage to the basin)
Impervious Area Cl, 15.S ac. (on -site and off -site drainage to the basin)
volumes
Permanent Pool Volume
Temporary Pool Volume
Forebay Volume
Other parameters
SA/DA1
Diameter of Orifice
Design Rainfall
Design TSS Removal 2
2- 3 1 -7 6 cu. ft. (combined volume of main basin and forebay)
3 S O 1 S cu. ft. (volume detained above the permanent pool)
S� Ca 3 I cu. ft. (approximately 20% of total volume)
(surface area to drainage area ratio from DWQ table)
o4r 3 in. (2 to 5 day temporary pool draw -down required)
in.
9O % (minimum 85% required)
Form SWU-102 Rev 3.99 Page l of 4

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 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 BMP manual provides design tables for both 85% TSS removal and 90% 7'SS removal.
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).
A1/*S b. The forebay volume is approximately equal to 20% of the basin volume.
pf*✓j c. The temporary pool controls runoff from the design storm event.
A*r3 d. The temporary pool draws down in 2 to 5 days.
fitlff e. If required, a 30-foot vegetative filter is provided at the outlet (include non -erosive flow
calculations)
/%I3 f. The basin length to width ratio is greater than 3:1.
g. The basin side slopes above the permanent pool are no steeper than 3:1.
h. A submerged and vegetated perimeter shelf with a slope of 6:1 or less (show detail).
i. Vegetative cover above the permanent pool elevation is specified.
A06 j. A trash rack or similar device is provided for both the overflow and orifice.
ti/A k. A recorded drainage easement is provided for each basin including access to nearest right-
of-way.
45 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.
m. A mechanism is specified which will drain the basin for maintenance or an emergency.
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) oes 0 does not incorporate a vegetated filter at the outlet.
This system (check one) 0 does "�oes not incorporate pretreatment other than a forebay.
Form SWU-102 Rev 3.99 Page 2 of 4

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 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 11 S feet in the main pond, the sediment shall be removed.
When the permanent pool depth reads A S feet in the forebay, the sediment shall be removed.
Sediment
Bottom
El. V, S'
----------
on 2A.O
FOREBAY
BASIN DIAGRAM
(fill in the blanks)
Permanent Pool Elevation 26,0
Sediment Removal Elevation Z/. S t7511o_______________________________________
Bottom Elevation 20. 0 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 Rev 3.99 Page 3 of 4

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: Ronald J. Core
Title: Vice Chancellor Business Affairs
Address: UNCW, 601 S. College Rd., Wilmington, NC 28403
Note: The legally responsible party should not be a homeowners association unless more than 50%a of the lots have been sold and a
resident of the subdivision has been named the president.
I Veneta R. Mahler ,aNotary Public for the State ofNortIn Carolina ,
Countyof New Hanover ,do hereby certify that RonaLd J. Core
personally appeared before me this 4th . day of March 12005 and acknowledge the due
execution of the forgoing wet detention basin maintenance requirements. Witness my hand and official seal,
NOTARy
Z ' ®,® : U
G
s,�'q�OVER GOJ\`
My commission expires Veneta R. Mahler
BLIC
New Hanover County, North Carolina
My Commission Expires 9/14/08
Form SWU-IO2 Rev 3.99 Page 4 of 4

State Stormwater Management Systems
Permit No. SW8 970128 Modification
UNC-W Honors, International & Privatized Housing
Stormwater Permit No. SW8 970128 Mod.
New Hanover County
Designer's Certification
I, ,S7EPNEn/ e. 7HowRs as a duly registered P.eoFEtjio.✓gL E.✓6nvs6iQ in the
State of North Carolina, having been authorized to observe (periodically/ weekly/ full
time) the construction of the project,
Project)
for tlAwc N/L Nlma TO i✓ (Project Owner) hereby state that, to the
best of my abilities, due care and diligence was used in the observation of the project
construction such that the construction was observed to be built within substantial
compliance and intent of the approved plans and specifications.
The checklist of items on page 2 of this form is included in the Certification.
Noted deviations from approved plans and specification:.
Signature^
Registration Number O 2 7 32 2
Date /%.P/L 24r 2oo
Page 6 of 7

e
J

State Stormwater Management Systems
Permit No. SW8 970128 Modification
Certification Requirements:
,IA?7 _1. The drainage area to the system contains approximately the permitted
acreage.
,tV7 2. The drainage area to the system contains no more than the permitted
amount of built -upon area.
_44�L3. All the built -upon area associated with the project is graded such that the
runoff drains to the system.
/1 4. All roof drains are located such that the runoff is directed into the system.
5. The outlet/bypass structure elevations are per the approved plan.
,dr47-6. The outlet structure is located per the approved plans.
,Ago_7. Trash rack is provided on the outlet/bypass structure.
.,Aj7_8. All slopes are grassed with permanent vegetation.
zt/79. Vegetated slopes are no steeper than 3:1.
/J �,7 10. The inlets are located per the approved plans and do not cause short-
circuiting of the system.
11. The permitted amounts of surface area and/or volume have been
provided.
!�) 12. Required drawdown devices are correctly sized per the approved plans.
13. All required design depths are provided.
,Alf? 14. All required parts of the system are provided, such as a vegetated shelf,
and a forebay.
15. The required system dimensions are provided per the approved plans.
cc: NCDENR-DWQ Regional Office
Tony Roberts, New Hanover County Building Inspections
Page 7 of 7

State Stormwater Management Systems
Permit No SW8 970128
RECEIVED
TO: NC DENR/Division of Environmental Management OCT 3 0 1998
Water Quality Section !
127 Cardinal Drive Extension
Wilmington, NC 28405-3845
RE: UNC-W 200 Student Housing
Permit No. SW8 970128
Dated: May 13, 1997
A&K Project No. 95340
Engineer's Certification
I, John S. Tunstall, P. E. , as a duly registered Professional Engineer in the State of
North Carolina, having been authorized to observe (periodically, weekJy, ne the construction of the project,
200 Student
(Project)
for LJNC-W (Project Owner) hereby state that, to the best of my abilities, due
care and diligence were 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.
Noted deviations from approved plans and specifications:
SEAL
19851 a
Signature �/ a�ep000B/1p 01 Ba 8�40�
Registration No. 19851
Date October 1. 1998
cc: Mr. Carl Dempsey/UNC-W
95340-t
CONSULTING ENGINEERS, INC.
_�� 902 Market Street Wilmington, NC 26401-4733