SW8160410_Current Permit_20160524

PAT MCCRORY
Governor
DONALD R. VAN DER VAART
Energy, Mineral
and Land Resources
ENVIRONMENTAL QUALITY
May 24, 2016
Dr. Terri Cobb, Superintendent
Pender County Board of Education
925 Penderlea Highway
Burgaw, NC 28425
Subject: State Stormwater Management Permit No. SW8160410
Surf City K-8 School
High Density Wet Detention Pond Project
Pender County
Dear Dr. Cobb:
Secretory
TRACY DAVIS
Director
The Wilmington Regional Office received a complete Stormwater Management Permit Application for
Surf City K-8 School on May 18, 2016. Staff review of the plans and specifications has determined that
the project, as proposed, will comply with the Stormwater Regulations set forth in Title 15A NCAC
2H.1000 and Session Law 2008-211. We are forwarding Permit No. SW8 160410 dated May 24, 2016,
for the construction, operation and maintenance of the BMP's and built -upon area associated with the
subject project.
This permit shall be effective from the date of issuance until May 24, 2024, and shall be 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,
certification of the BMP's, procedures for changing 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 certify the BMP's, 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.
If you have any questions, or need additional information concerning this matter, please contact Linda
Lewis with the Division of Energy, Mineral and Land Resources in the Wilmington Regional Office, at
[phone].
Sincerely,
Tracy Davis, P.E., Director
Division of Energy, Mineral and Land Resources
GDS/arl: 111StormwaterlPermits & Projects120161160410 HD12016 05 permit 160410
cc: Dan Fisk, P.E., Paramounte Engineering
Pender County Planning
Wilmington Regional Office Stormwater File
State of North Carolina I Enviromnental Quality I Energy, Mineral and Land Resources
127 Cardinal Drive Extension I Wilmington, NC 28405
910 796 7215 T 1 910 350 2004 F I liMI/portal.nedenr.ore/web/]r/

State Stormwater Management Systems
Permit No. SW8 160410
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
Pender County Board of Education
Surf City K 8 School
Shepards Road, Surf City, Pender County
FOR THE
construction, operation and maintenance of four (4) wet detention pond(s) within'/ mile of
and draining to Class SA waters in compliance with the provisions of 15A NCAC 2H .1000
and Session Law 2008-211 (hereafter collectively referred to as the "stormwater rules') 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 (hereafter referred to as the Division or DEMLR) and considered a part of this
permit.
This permit shall be effective from the date of issuance until May 24, 2024, and shall be
subject to the following specified conditions and limitations:
I. DESIGN STANDARDS
1. This permit is effective only with respect to the nature and volume of stormwater
described in the application and other supporting data.
2. This stormwater system has been approved for the management of stormwater runoff
as described in Sections 1.7 and 1.8 of this permit. The runoff from all built -upon area
within the permitted drainage area(s) of this project must be directed into the permitted
stormwater control measures(s). The stormwater control measures labeled Pond 1,
Pond 2, Pond 3 and Pond 4 have been designed to handle the runoff from 247,100 sf;
99,125 sf; 153,000 sf; and 120,000 sf of impervious area, respectively.
3. The maximum built -upon area allowed for the entire project is 619,225 square feet.
4. The drainage area(s) will be limited to the amount(s) of built -upon area indicated in
Sections 1.2, 1.7 and 1.8 of this permit, and per approved plans. The built -upon area for
the future development within the drainage area of Ponds 1, 2, 3 and 4 is limited to
15,675 sf; 2,625 sf; 37,355 sr'; and 14,614 sf, respectively.
5. A 50' wide vegetative buffer must be provided and maintained adjacent to all surface
waters, measured horizontally from and perpendicular to the normal pool of
impounded structures, the top of bank of both sides of streams and rivers and the
mean high water line of tidal waters.
Page 1 of 7

State Stormwater Management Systems
Permit No. SW8 160410
6: All runoff being directed into wetlands shall flow into and through those wetlands at a
non -erosive velocity.
7. The following design criteria have been provided in the wet detention ponds and must
be maintained at design condition:
Pond 1
Pond 2
Pond 3
Pond 4
a. Drainage Area, acres:
Onsite, ft2:
Offsite, ft2:
10.82
471,130
0
4.83
210,375
0
9.90
431,420
0
4.52
196,715
0
b. Total Impervious Surfaces, ft2:
Onsite, ft2:
Offsite, ft2:
247,100
247,100
0
99,125
99,125
0
153,000
153,000
0
120,000
120,000
0
c. Average Pond Design Depth, feet:
3.5
4.0
3.5
3.0
d. TSS Removal Efficiency:
90%
90%
90%
90%
e. Design Storm, inches:
3.7
3.7
3.7
3.7
f. Permanent Pool PP Elevation, FMSL:
35.0
33.0
30.0
34.0
g. Permitted PP Surface Area, ft2:
79,800
16,580
19,660
28,320
h. Temporary Storage Elevation, FMSL:
35.9
34.25
31.50
35.0
i. Permitted Storage Volume, ft3:
74,455
23,225
32,177
30,120
j. Predev. 1 r-24 hr. discharge rate, cfs:
1.98
1.49
2.66
1.41
k. Controlling Orifice, inch 0 pipe:
5.0
2.5
3.0
3.0
I. Orifice Flow Rate, cfs:
.0.36
0.11
0.17
0.14
m. PP Volume, ft3:
303,120
52,630
62,503
81,905
n. Forebay Volume, ft3:
62,480
10,588
12,625
16,113
o. Maximum Fountain Horsepower:
1
1/6
114
1/3
p. Receiving Stream/River Basin:
County Line
Branch / Becky's Creek / CPF24
q. Stream Index Number:
18-87-6-1 / 18-87-8
r. Classification of Water Body:
SA HQW
s. Secondary BMP
Inf. Basin Inf. Basin I LSNFS LSNFS
8. The design storm volume discharged from the wet pond must be directed to a
secondary BMP in series with the wet pond. The secondary BMP's are infiltration
basins for Ponds 1 & 2, and vegetated filter strips and level spreaders for Ponds 3 & 4.
The following design criteria have been provided in the secondary BMP's and must be
maintained at design condition:
IB #1
IB #2
LSNFS #3
LSNFS #4
a. Area bottom, ft2:
9,815
5,725
6,000
5,250
b. Depth of Basin, feet:
1.0
1.0
--
--
c. Volume provided, ft3:
10,438
6,205
--
--
d. Maximum flowrate from pond, cfs:
.623
.184
8.93 10 r
6.49 10 r
e. Volume infiltrated in 24 hours, ft3:
31,104
9,504
--
--
f. Length of levels reader 10 ft/cfs :
--
--
100
70
g. Width of vegetated filter, feet:
--
--
60
75
h. Slope of vegetated filter <5% :
--
--
1.25%
0.53%
i. Effective Infiltration area, min. ft2:
2,681
2,510
II. SCHEDULE OF COMPLIANCE
No component of the approved stormwater system shown on the approved plans shall
be altered, modified, relocated, filled in, resized or changed in any way, unless and
until the Division has approved of the revised plan.
2. The stormwater management system shall be entirely constructed, vegetated and
operational for its permitted use prior to the construction of any built -upon surface.
Page 2 of 7

State Stormwater Management Systems
Permit No. SW8 160410
3. During construction, erosion shall be kept to a minimum and any eroded areas of the
system will be repaired immediately. 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.
4. The permittee shall at all times provide the operation and maintenance necessary to
assure that all components of the permitted stormwater system function at design
condition. The approved Operation and Maintenance Agreement is incorporated by
reference into this permit and must be followed in its entirety and maintenance must
occur at the scheduled intervals.
5_ Records of maintenance activities must be kept and made available upon request to
authorized personnel of the Division. The records will indicate the date, activity, name
of person performing the work and what actions were taken.
6. If the permanent pool volume is greater than 30,000 cubic feet, a decorative spray
fountain will be allowed in the stormwater treatment system, subject to the following
criteria:
a. The fountain must draw its water from less than 2' below the permanent pool
surface.
b. Separated units, where the nozzle, pump and intake are connected by tubing,
may be used only if they draw water from the surface in the deepest part of the
pond.
c. The falling water from the fountain must be centered in the pond, away from the
shoreline.
d. The maximum horsepower for a fountain in these ponds is listed in Section 1.7(o)
of this permit.
7. The facilities shall be constructed in accordance with the conditions of this permit, the
approved plans and specifications, and other supporting data.
8. Upon completion of construction, prior to issuance of a Certificate of Occupancy, and
prior to operation of this permitted facility, the permittee shall'cause a certification from
an appropriate designer for the system installed to be submitted, certifying that the
permitted facility has been installed in accordance with this permit, the approved plans
and specifications, and other supporting documentation. Any deviations from the
approved plans and specifications must be noted on the Certification. A modification
may be required for those deviations.
9. All stormwater collection and treatment systems must be located in either public rights -
of -way, dedicated common areas or recorded drainage easements. The final plats for
the project will be recorded showing all such required rights -of -way, common areas
and easements, in accordance with the approved plans. Access to the stormwater
facilities for inspection and maintenance shall be provided and maintained via
appropriate recorded access easements to the nearest public right-of-way.
10. Prior to transfer of the permit, the stormwater facilities will be inspected by Division
personnel. The project and the stormwater facility must be in substantial compliance
with all permit conditions. In addition, records of maintenance activities performed to
date will be required.
11. The Director may notify the permittee when the permitted site does not meet one or
more of the minimum requirements of the permit. Within the time frame specified in the
notice, the permittee shall submit a written time schedule to the Director for modifying
the site to meet minimum requirements. The permittee shall provide copies of revised
plans and certification in writing to the Director that the changes have been made.
Page 3 of 7

State Stormwater Management Systems
Permit No. SW8 160410
12. The permittee shall submit to the Director and shall have received approval for revised
plans, specifications, and calculations prior to construction, for any modification to the
approved plans, including, but not limited to, those listed below:
a. Any revision to any item shown on the approved plans, including the stormwater
management measures, runoff conveyance system, built -upon area, details,
etc.
b. Redesign or addition to the approved amount of built -upon area or to the
drainage area.
C. Further development, subdivision, acquisition, lease or sale of any, all or part of
the project area. The project area is defined as that property listed on the
application.
d. Filling in, altering, modifying, rerouting or relocating any component of the
stormwater runoff conveyance system shown on the approved plan.
e. The construction of any future BUA listed on the application.
III. GENERAL CONDITIONS
Any individual or entity found to be in noncompliance with the provisions of a
stormwater management permit or the requirements Stormwater rules is subject to
enforcement procedures as set forth in NCGS 143 Article 21.
2. The issuance of this permit does not preclude the Permittee from complying with any
and all statutes, rules, regulations, or ordinances, which may be imposed by other
government agencies (local, state, and federal) having jurisdiction.
3. In the event that the facilities fail to perform satisfactorily the Permittee shall take
immediate corrective action, including those as may be required by this Division, such
as the construction of additional or replacement stormwater management systems.
Additional or replacement stormwater management systems shall receive a permit
from the Division prior to construction.
4. 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
Name/Ownership Change Form, accompanied by the supporting documentation as
listed on the form, to the Division of Energy, Mineral and Land Resources at least 60
days prior to any one or more of the following events:
a. An ownership change including 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;
b. The sale or conveyance of the common areas to a Homeowner's or Property
Owner's Association, subject to the requirements of Session Law 2011-256;
C. Bankruptcy;
d. Foreclosure, subject to the requirements of Session Law 2013-121,
e. Dissolution of the partnership or corporate entity, subject to NCGS 57D-2-01(e)
and NCGS 57D-6-07;
f. A name change of the current permittee;
g. A name change of the project;
h. A mailing address change of the permittee;
5. The permittee is responsible for compliance with all permit conditions until such time
as 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 stormwater permit.
6. The permittee grants DEMLR Staff permission to enter the property during normal
business hours for the purpose of inspecting all components of the permitted
stormwater management facility.
Page 4 of 7

State Stormwater Management Systems
Permit No. SW8 160410
7. The permit issued shall continue in force and effect until modified, revoked, terminated
or renewed. The permit may be modified, revoked and reissued or terminated for
cause. The filing of a request for a permit modification, revocation and re -issuance or
termination does not stay any permit condition.
8. Approved plans, calculations, supplement forms, operation and maintenance
agreements and specifications for this project are incorporated by reference and are
enforceable parts of the permit. A copy of the approved plans and specifications shall
be maintained on file by the Permittee at all times.
9. Unless specified elsewhere, permanent seeding requirements for the stormwater
control must follow the guidelines established in the North Carolina Erosion and
Sediment Control Planning and Design Manual.
10. 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 as
allowed by the laws, rules and regulations contained in Session Law 2006-246, Title
15A NCAC 2H.1000, and NCGS 143-215.1 et.al.
11. The permittee shall submit a permit renewal request at least 180 days prior to the
expiration date of this permit. The renewal request must include the appropriate
documentation and the processing fee.
Permit issued this the 24th day of May 2016.
NORTH CAROLINA ENVIRONMENTAL MANAGEMENT COMMISSION
i racy uwis, r.t., uirector
Division of Energy, Mineral and Land Resources
By Authority of the Environmental Management Commission
Permit Number SW8 160410
Page 5 of 7

State Stormwater Management Systems
Permit No, SW8 160410
Surf City K-8 School
Stormwater Permit No. SW8 160410
Pender County
Designer's Certification
I, , as a duly registered in the State
of North Carolina, having been authorized to observe (periodically/ weekly/ full time) the
construction of the project,
(Project)
for (Project Owner) hereby state that, to the best
of my abilities, due care and diligence was used in the observation of the project construction
such that the construction was observed to be built within substantial compliance and intent
of the approved plans and specifications.
The checklist of items on page 2 of this form is included in the Certification.
Noted deviations from approved plans and specifications:
Signature
Registration Number
Date
SEAL
Page 6 of 7

State Stormwater Management Systems
Permit No. SW8 160410
Certification Requirements:
Page 2 of 2
The drainage area to the system contains approximately the permitted acreage.
2. The drainage area to the system contains no more than the permitted amount
of built -upon area.
3. All the built -upon area associated with the project is graded such that the runoff
is adequately conveyed to the system.
4. All roof drains are located such that the runoff is adequately conveyed to the
system.
5. The outlet structure elevations are per the approved plan.
6. The outlet structure is located per the approved plans.
7. Trash rack is provided for the outlet structure and over the face of the
temporary pool weir.
8. All slopes above permanent pool are stabilized with permanent vegetation.
9. Vegetated slopes above permanent pool are no steeper than 3:1.
10. The inlets are located per the approved plans and do not cause short-circuiting
of the system.
11. The permitted amounts of surface area and/or volume have been provided.
12. The permitted size drawdown devices are accurately located per the approved
plans.
13. All required design depths are provided.
14. All required parts of the system are provided, such as a vegetated shelf, a
forebay, a vegetated filter, level spreader and the secondary BMP.
15. The required system dimensions are provided per the approved plans.
16. All components of the stormwater BMP are located in either recorded common
areas, or recorded easements.
cc: NCDEQ-DEMLR Regional Office
Pender County Planning
Page 7 of 7

Operation & Maintenance Agreement
Project Name:
Project Location:
Surf City K-S School
[S—hepards Road - Town of Surf City
Cover Page mwo
Maintenance records shall be kept on the following BMP(S S. This maintenance record shall be kept in a log in a known set IocaUon.
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 apply & cot
Bioretention Cell
Quantity:
Dry Detention Basin
Quantity:
Grassed Swale
Quantity:
Green Roof
Quantity:
Infiltration Basin
Quantity:
Infiltration Trench
Quantity:
Level Spreader/VFS
Quantity:
Permeable Pavement
Quantity:
Proprietary System
Quantity:
Rainwater Harvesting
Quantity:
Sand Filter
Quantity:
Stormwater Wetland
Quantity:
Wet Detention Basin
Quantity:
Disconnected Impervious Area
Present:
User Defined BMP
Present:
2
eA
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)
CLICK TO UPDATE O&M MANUAL
at each -
West PL
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.
Signature:
1.
County of
" Responsible Party:
Title & Organization:
Street address:
City, state, zip:
Phone number(s):
Email:
NC
OU-
Date: ti I
� t NN , G'-0.C` c� h a Notary Public for the State of ' C
?eV\.A2 V' , do hearby certify that `TQ irr, C 0 b (a
personally appeared before me this ( day of 20 and
acknowledge the due execution of th perations and Maintenance reeme t .
Witness my hand and official seal, k U-#01
My commission expires
(r3-(9
9 ECEIVE
MAY 1 1 20%
BY:
STORM-EZ 5/10/2016
Version 1.4 O&M Manual Page 1 of 7

L evel Spreader -Vegetated Fitter Strip 1 estored Ri an Buffer Maintenance Re uirements
Important maintenance procedures:
Immediately after the filter strip is established, any newly planted vegetation will be watered twice weekly if
- needed until the plants become established (commonly six weeks).
- Once a year, the filter strip will be reseeded to maintain a dense growth of vegetation
- Stable groundcover will be maintained in the drainage area to reduce the sediment load to the vegetation.
Two to three times a year, grass filter strips will be mowed and the clippings harvested to promote the growth of
thick vegetation with optimum pollutant removal efficiency. Turf grass should not be cut shorter than 3 to 5 inches
and may be allowed to grow as tall as 12 inches depending on aesthetic requirements (NIPC, 1993). Forested
filter strips do not require this type of maintenance.
Once a year, the soil will be aerated if necessary.
Once a year. soil pH will be tested and lime will be added if necessary,
After the filter strip is established, it will be inspected quarterly and within 24 hours after every storm event greater than 1.0 inch
(or 1.5 inches if In a Coastal County). Records of operation and maintenance will be kept in a known set location and will be
available upon request.
Inspection activities shall be performed as follows. Any problems that are found shall be repaired Immedately.
BMP element:
Potentialproblem:
How to 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
erosive gullies have formed.
Regrade the soil if necessary to 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 approximately six inches.
long.
The flow splitter device (if
The flow splitter device is
Unclog the conveyance and dispose of any sediment off -site.
applicable)
clogged.
The flow splitter device is
Make any necessary repairs or replace if damage is too large for repair.
damaged.
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
Swale.
Regrade the swale if necessary to smooth it over and provide erosion
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),
ECEIVE
MAY 11 201F
BY:
STORM-EZ 5/10/2016
Version 1.4 O&M Manual Page 2 of 7

LS VFS / Restored Riparian Buffer Maintenance Requirements {Continued)
The swale and the level lip
The swale is clogged with
Remove the sediment and dispose of it off -site.
sediment.
The level lip is cracked,
Repair or replace lip.
settled, undercut, eroded or
otherwise damaged.
There is erosion around the
Regrade the soil to create a berm that is higher than the level lip, and
end of the level spreader that
there plant a ground cover and water until it is established. Provide lime
shows stormwater has
bypassed wt.
and a one-time fertilizer application.
Trees or shrubs have begun to
Remove them.
grow on the swale or just
downslope of the level lip.
The bypass channel
Areas of bare soil and/or
Regrade the soil if necessary to remove the gully, and then reestablish
erosive gullies have formed.
proper erosion control.
Turf reinforcement is damaged
Study the site to see if a larger bypass channel is needed (enlarge if
or ripap is rolling downhill.
necessary). After this, reestablish the erosion control material.
The filter strip
Grass is too short or too long
Maintain grass at a height of approximately three to six inches_
(if applicable).
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.
Sediment is building up on the
Remove the sediment and restabilize the soil with vegetation if
filter strip.
necessary. Provide lime and a one-time fertilizer application.
Plants are desiccated.
Provide additional irrigation and fertilizer as needed.
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.
Nuisance vegetation is
Remove vegetation by hand if possible. If pesticide is used, do not
choking out desirable species.
allow it to get into the receiving water.
The receiving water
Erosion or other signs of
Contact the NCDENR local Regional Office, or the 401 Oversight Unit
damage have occurred at the
at 919-733-1786.
outlet.
ECEIVE
mAT 1 12016
BY:
STORM-EZ 5/10/2016
Version 1.4 O&M Manual Page 3 of 7

Infiltration System Maintenance Requirements
Important maintenance procedures:
- The drainage area will be carefully managed to reduce The sediment load to The infiltration basin.
Immediately after the infiltration basin is established, the vegetation will be watered twice weekly if needed until
the plants become established (commonly six weeks).
No portion of the infiltration basin will be fertilized after the initial fertilization that is required to establish the
vegetation.
- The vegetation in and around the basin will be maintained at a height of approximately six inches.
After the infiltration basin is established, it shall be inspected once a quarter 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 shall be kept in a known set
location and shall 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 to remedlate the problem:
The entire BMP
Trash/debris is present.
Remove the trash/debris.
The perimeter of the
Areas of bare soil and/or
Regrade the soil if necessary to remove the gully, and then plant a
infiltration basin
erosive gullies have formed.
ground cover and water until it is established. Provide lime and a one-
time fertilizer application.
The inlet device: pipe or
The pipe is clogged (if
Unclog the pipe. Dispose of the sediment off -site.
swale
applicable)_
The pipe is cracked or
Replace the pipe.
otherwise damaged (if
applicable).
Erosion is occurring in the
Regrade the swale if necessary to smooth it over and provide erosion
swale (if applicable).
control devices such as reinforced turf matting or riprap to avoid future
problems with erosion.
The forebay
Sediment has accumulated
Search for the source of the sediment and remedy the problem if
and reduced the depth to 75%
possible. Remove the sediment and dispose of it in a location where it
of the original design depth.
will not cause impacts to streams or the BMP.
Erosion has occurred or riprap
Provide additional erosion protection such as reinforced turf matting or
is displaced.
riprap if needed to prevent future erosion problems.
Weeds are present.
Remove the weeds, preferably by hand. if pesticides are used, wipe
them on the plants rather than spraying.
The main treatment area
A visible layer of sediment has
Search for the source of the sediment and remedy the problem if
accumulated.
possible. Remove the sediment and dispose of it in a location where it
will not cause impacts to streams or the BMP. Replace any media that
was removed in the process. Revegetate disturbed areas immediately.
Water is standing more than 5
Replace the top few inches of filter media and see if this corrects the
days after a storm event.
standing water problem. If so, revegetate immediately. If not, consult
an appropriate professional for a more extensive repair.
Weeds and noxious plants are
Remove the plants by hand or by wiping them with pesticide (do not
growing in the main treatment
spray).
area.
The embankment
Shrubs or trees have started
Remove shrubs or trees immediately,
to grow on the embankment.
An annual inspection by an
Make all needed repairs.
appropriate professional
shows that the embankment
needs repair
�C
G
The outlet device
Clogging has occurred.
Clean out the outlet device. Dis rofthe iment off- i
The outlet device is damaged
Repair or replace the outlet devi
The receiving water
Erosion or other signs of
Contact the local NC Department OEnvironmenr and Nat ural
damage have occurred at the
Resources Regional Office.
outlet.
ST
Version 1.4
O&M Manual
ari ur2uib
Page 4 of 7

Wet Detention Pond Maintenance Requirements
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 dprap 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 11 20S
STORM-EZ BY: 5/10/2016
Version 1.4 O&M Manual Page 5 of 7

Wet Detention Pond Maintenance Requirements (Continued)
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 beaver
Use traps to remove muskrats and consult a professional to remove
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.
ECEIVE
MAY 1 12016
BY:
STORM-EZ 5/10/2016
Version 1.4 O&M Manual Page 6 of 7

Wet Detention Fond Design AgMmary
Wet Pond Dlaafam
WET POND ID
FOREBAY
MAIN POND
#1
Permanent Pool El.
35
Permanent Pool El.
35
Pretreatment other
Temporary Pool El:
Clean Out Depth:
35.9
met 8��'i�
Temporary Pool El:
Clean Out Depth:
359
5
No
than forebay?
Sediment Removal El:
27/31/27
Sediment Removal El:
30
Has Veg. Filter? No
Bottom Elevation:
2613006
Bottom Elevation:
1 27
WET POND ID
FOREBAY
MAIN POND
#2
Permanent Pool El.
33
Permanent Pool El.
33
Temporary Pool El:
3425
Temporary Pool El:
34.25
Pretreatment other No
Clean Out Depth:
4
Clean Out Depth:
6
than forebay?
Sediment Removal El:
29
Sediment Removal El:
27
Has Veg. Finer? No
Bottom Elevation:
28
Bottom Elevation:
26
WET POND ID
#3 Tr�
FOREBAY
Permanent Pool El.
30
MAIN POND
Permanent Pool El.
30
Temporary Pool El:
31.5
Temporary Pool El;
31.5
Pretreatment other
Clean Out Depth:
5
Clean Out Depth:
5
No
than forebay?
Sediment Removal El:
25
Sediment Removal El,
25
Has Veg. Filter? Yes
Bottom Elevation:
1 24
Bottom Elevation:
1 24
WET POND ID
#4 ��
FOREBAY
Permanent Pool El.
34
MAIN POND
Permanent Pool El.
34
Temporary Pool El:
35
Temporary Pool El:
35
Pretreatment other
Clean Out Depth:
4
Clean Out Depth:
5
No
than forebay?
Sediment Removal EI_•
30
Sediment Removal El:
29
Has Veg. Fitter? Yes
Bottom Elevation:
28 j
Bottom Elevation:
28
ECEIVE
MAY 1 1 201F
.y
5/10/2016
STORM-EZ O&M Manual Page 7 of 7
Version 1.4

DEMLR USE ONLY
Date Received.
F Paid
Permit Number
Applicabl ules. ❑ Coastal SW — 5 ❑ Coastal SW —'20W T h II - Post Cons ruction
(select all that apply) ❑ Non -Coastal SW- HQW/ORW Waters ❑ Universal Stormwater Management Plan
❑ Other WQ Mgmt Plan:
State of North Carolina
Department of Environment and Natural Resources
Division of Energy, Mineral and Land Resources
STORMWATER MANAGEMENT PERMIT APPLICATI[AP:R2
E IVE
This form may be photocopied for use as an original
I. GENERAL INFORMATION
9 20161. Project Name (subdivision, facility, or establishment name - should be consistent t name ono ans,
specifications, letters, operation and maintenance agreements, etc.):
Surf City IC 8 School
2. Location of Project (street address):
Shepards Road
City:Town of Surf City County:Pender
Zip:,
3. Directions to project (from nearest major intersection):
From the intersection of US Hwy 17 and Shepards Rd and traveling south east alonsa Shepards Rd. the main
entrance to the project will be on your right, approximately 450' after the intersection of Shepards Rd and
Perkins Dr.
4. Latitude:340 27' 46" N Longitude:-770 34' 28" W of the main entrance to the project.
II. PERMIT INFORMATION:
1.a.Specify whether project is (check one): ®New ❑Modification ❑ Renewal w/ Modificationt
tRenewals with modifications also requires SWU-102 — Renewal Application Form
b. If this application is being submitted as the result of a modification to an existing permit, list the existing
permit number , its issue date (if known) , and the status of
construction: Not Started ❑Partially Completed" Completed* "provide a designer's
certification
2. Specify the type of project (check one):
❑Low Density RHigh Density ❑Drains to an Offsite Stormwater System ❑Other
3. If this application is being submitted as the result of a previously returned application or a letter from
DEMLR requesting a state stormwater management permit application, list the stormwater project
number, if assigned, and the previous name of the project, if different than currently
proposed,
4.a.Additional Project Requirements (check applicable blanks; information on required state permits can be
obtained by contacting the Customer Service Center at 1-877-623-6748):
❑CAMA Major RSedimentation/Erosion Control: ac of Disturbed Area
❑NPDES Industrial Stormwater 0404/401 Permit: Proposed Impacts 8 Acres
b.If any of these permits have already been acquired please provide the Project Name, Project/Permit Number,
issue date and the type of each permit:
5. Is the project located within 5 miles of a public airport? RNo Yes
If yes, see S.L. 2012-200, Part Vk http://portal.nodenr.orgtweb/ir/ruies-and-regulations
III. CONTACT INFORMATION
1.a. Print Applicant / Signing Official's name and title (specifically the developer, property owner, lessee,
designated government official, individual, etc. who owns the project):
Form SWU-101 Version Oct. 31, 2013 Page 1 of 6

Applicant/Organization:Pender County Board of Education
Signing Official & Title:Dr. Terri Cobb - Superintendent
b.Contact information for person listed in item 1a above:
Street Address:925 Penderiea Hwy.
City: Burgaw State: NC Zi p:28425
Mailing Address (if applicable):
City:
Phone: (910 ) 259-0133
Email:terri cobb(a_)pender.kl2.nc.us
State: Zip:
Fax: (910 ) 259-0133
c. Please check the appropriate box. The applicant listed above is:
® The property owner (Skip to Contact Information, item 3a)
❑ Lessee* (Attach a copy of the lease agreement and complete Contact Information, item 2a and 2b below)
❑ Purchaser* (Attach a copy of the pending sales agreement and complete Contact Information, item 2a and
2b below)
❑ Developer* (Complete Contact Information, item 2a and 2b below.)
2.a.Print Property Owner's name and title below, if you are the lessee, purchaser or developer. (This is the
person who owns the property that the project is located on):
Property Owner/Organization:
Signing Official & Title:
b.Contact information for person listed in item 2a above:
Street Address:
City:
Mailing Address (if applicable):
City:
State: Zip:
State:
Zip:
Phone: ( ) Fax: ( )
Email: _ EC E iVE
3.a. (Optional) Print the name and title of another contact such as the project's co tru a ?%y1Z1isor o her
person who can answer questions about the project: 0
Other Contact Person/Organization: By
Signing Official & Title:
b.Contact information for person listed in item 3a above:
Mailing Address:
City:,
Phone: ( )
Email:
4. Local jurisdiction for building permits: Town of Surf City
Point of Contact:Steve Padgett / Todd Rademacher
IV. PROJECT INFORMATION
State: Zip:
Fax: ( )
Phone #: (910 ) 328-3921
1. In the space provided below, briefly summarize how the stormwater runoff will be treated.
Impervious runoff will be collected in roof leaders catch basins and open channel swales and routed to one
multiple wet detention basins / infiltration basin bmps set up in series for treatment
Form SWU-101 Version Oct. 31, 2013 Page 2 of 6

2.a.lf claiming vested rights, identify the supporting documents provided and the date they were approved:
❑ Approval of a Site Specific Development Plan or PUDApproval Date:
❑ Valid Building Permit Issued Date:
❑ Other: Date:
b.lf claiming vested rights, identify the regulation(s) the project has been designed in accordance with:
❑ Coastal SW -1995 ❑ Ph II - Post Construction
3. Stormwater runoff from this project drains to the White Oak River basin.
4. Total Property Area: 99.2 acres 5. Total Coastal Wetlands Area: acres
6. Total Surface Water Area: acres
7. Total Property Area (4) - Total Coastal Wetlands Area (5) - Total Surface Water Area (6) = Total Project
Area,:99.2 acres
Total project area shall be calculated to exclude the following: the normal pool of impounded structures,
the area between the banks of streams and rivers, the area below the Normal High Water (NHKJ line or
Mean High Water (MHW) line, and coastal wetlands landward from the NHW (or MHMO line. The resultant
project area is used to calculate overall percent built upon area (BUA). Non -coastal wetlands landward of
the NHW (or MHM line may be included in the total project area.
8. Project percent of impervious area: (Total Impervious Area / Total Project Area) X 100 = 14.33 %
9. How many drainage areas does the project have?4 (For high density, count 1 for each proposed engineered
stormwater BMP. For low density and other projects, use 1 for the whole property area)
10. Complete the following information for each drainage area identified in Project Information item 9. If there are
more than four drainage areas in the project, attach an additional sheet with the information for each area
provided in the same format as below.
Basin Information
Drainage Area 1
Drainage Area 2
Drainage Area 3
Draina a Area 4
Receiving Stream Name
County Line
Branch
Becky's Creek
County Line
Branch
County Line
Branch
Stream Class
SA, HQW
SA, HQW
SA, HQW
SA, HQW
Stream Index Number *
18-87-6-1
18-87-8
18-87-6-1
18-87-6-1
Total Drainage Area (sf)
471,130
210,375
431,420
196,715
On -site Drainage Area (sf)
471,130
210,375
431,420
196,715
Off -site Drainage Area (sf)
0
0
0
0
Proposed Impervious Area** so
247,100
99,125
1 153,000
120,000
% Impervious Area" total
52.45
47.12
1 35.46
61.00
Impervious- Surface Area
Drainage Area 1
Drainage Area 2
Drainage Area 3
Drainage Area 4
On -site Buildings/Lots (so
35,972
74,953
4,464
97,866
On -site Streets so
105,662
16,751
2,487
0
On -site Parking (so
59,153
0
92,524
0
On -site Sidewalks (sf)
30,638
4,796
16,170
7,520
Other on -site (sf)
0
0
0
0
Future (sf)
15,675
2,625
37,355
14,614
Off -site (so
0
0
0
0
Existing BUA'"** s
0
0
1 0 1
0
Total (sf):
1 247,100
99,125
1 153,000
1 120,000
* Stream Class and Index Number can be determined at:
http://portal. ncdenr. otglweb/wg/ps/csu/classifications
** Impervious area is defined as the built upon area including, ki s, roads, parking
areas, sidewalks, gravel areas, etc. IV;
*** Report only that amount of existing BUA that will remain aft 4 veloptment ©o not ort any existing
BUA that is to be removed and which will be replaced by ne UA-V % 9 70IR
11. How was the off -site impervious area listed above determined? ovide documentatio /A
BY:
Projects in Union County: Contact DEMLR Central Office staff to check if the project is located within a Threatened &
Endangered Species watershed that may be subject to more stringent Stormwater requirements as per 1 SA NCAC 02B .0600.
Form SWU-101 Version Oct. 31, 2013 Page 3 of 6

V. SUPPLEMENT AND O&M FORMS
The applicable state stormwater management permit supplement and operation and maintenance (O&M) forms
must be submitted for each BMP specified for this project. The latest versions of the forms can be downloaded
from http://portal.nedenr.org/web/wgtws/su/bmp-manual.
VI. SUBMITTAL REQUIREMENTS
Only complete application packages will be accepted and reviewed by the Division of Energy, Mineral and
Land Resources (DEMLR). A complete package includes all of the items listed below. A detailed
application instruction sheet and BMP checklists are available from
http://portal.ncdenr.org/web/wg/ws/su/statesw/forms docs. The complete application package should be
submitted to the appropriate DEMLR Office. (The appropriate office may be found by locating project on the
interactive online map at http://portal.ncdenr.org/web/wq/ws/su/maps.)
Please indicate that the following required information have been provided by initialing in the space
provided for each item. All original documents MUST be signed and initialed in blue ink. Download the latest
versions for each submitted application package from
http://Portal.ncdenr.org/webtwq/ws/su/statesw/forms does.
Initials
1. Original and one copy of the Stormwater Management Permit Application Form.
2. Original and one copy of the signed and notarized Deed Restrictions & Protective Covenants
Form. (if required as per Part Vll below)
3. Original of the applicable Supplement Form(s) (sealed, signed and dated) and O&M
agreement(s) for each BMP.
4. Permit application processing fee of $505 payable to NCDENR. (For an Express review, refer to
http://www.envhelp.orq/paaes/onestopexpress.htmi for information on the Express program
and the associated fees. Contact the appropriate regional office Express Permit Coordinator for
additional information and to schedule the required application meeting.)
5. A detailed narrative (one to two pages) describing the stormwater treatment/management for
the project. This is required in addition to the brief summary provided in the Project
Information, item 1.
6. A USGS map identifying the site location. If the receiving stream is reported as class SA or the orric
receiving stream drains to class SA waters within'h mile of the site boundary, include the'/z
mile radius on the map.
7. Sealed, signed and dated calculations (one copy). a?F
8. Two sets of plans folded to 8.5" x 14" (sealed, signed, & dated), including: -mot..
a. Development/Project name.
b. Engineer and firm.
c. Location map with named streets and NCSR numbers.
d. Legend.
e. North arrow.
f. Scale.
g. Revision number and dates.
h. Identify all surface waters on the plans by delineating the normal pool elevation of
impounded structures, the banks of streams and rivers, the MHW or NHW line of tidal
waters, and any coastal wetlands landward of the MHW or NHW lines.
• Delineate the vegetated buffer landward from the normal pool elevation of impounded
structures, the banks of streams or rivers, and the MHW (or NHW) of tidal waters.
i. Dimensioned property/project boundary with bearings & distances. E C E I V E
j. Site Layout with all BUA identified and dimensioned.
k. Existing contours, proposed contours, spot elevations, finished floor elevationjeadrI62
I. Details of roads, drainage features, collection systems, and stormwater contra 9 201''m. Wetlands delineated, or a note on the plans that none exist. (Must be delineay aqualified person. Provide documentation of qualifications and identify the persho
made the determination on the plans.
n. Existing drainage (including off -site), drainage easements, pipe sizes, runoff calculations.
o. Drainage areas delineated (included in the main set of plans, not as a separate document).
p. Vegetated buffers (where required).
9. Copy of any applicable soils report with the associated SHWT elevations (Please identify
elevations in addition to depths) as well as a map of the boring locations with the existing
elevations and boring logs. Include an 8.5"x11" copy of the NRCS County Soils map with the
project area clearly delineated. For projects with infiltration BMPs, the report should also
Form SWU-101 Version Oct. 31, 2013 Page 4 of 6

include the soil type, expected infiltration rate, and the method of determining the infiltration rate.
(Infiltration Devices submitted to WIRO: Schedule a site visit for DEMLR to verify the SHWT prior
to submittal, [phone].)
10. A copy of the most current property deed. Deed book: 444l Page No:
11. For corporations and limited liability corporations (LLC): Provide documentation from the NC
Secretary of State or other official documentation, which supports the titles and positions held
by the persons listed in Contact Information, item 1 a, 2a, and/or 3a per 15A NCAC 21-1.1003(e).
The corporation or LLC must be listed as an active corporation in good standing with the NC
Secretary of State, otherwise the application will be returned.
http:/twww.secretary.state.nc.us/Corporations/CSearch.aspx
VII. DEED RESTRICTIONS AND PROTECTIVE COVENANTS
For all subdivisions, outparceis, and future development, the appropriate property restrictions and protective
covenants are required to be recorded prior to the sale of any lot. If lot sizes vary significantly or the proposed
BUA allocations vary, a table listing each lot number, lot size, and the allowable built -upon area must be provided
as an attachment to the completed and notarized deed restriction form. The appropriate deed restrictions and
protective covenants forms can be downloaded from http://portal.ncdenr.org/webAr/state-stormwater-forms doc€.
Download the latest versions for each submittal.
In the instances where the applicant is different than the property owner, it is the responsibility of the property
owner to sign the deed restrictions and protective covenants form while the applicant is responsible for ensuring
that the deed restrictions are recorded.
By the notarized signature(s) below, the permit holder(s) certify that the recorded property restrictions
and protective covenants for this project, if required, shall include all the items required in the permit and
listed on the forms available on the website, that the covenants will be binding on all parties and persons
claiming under them, that they will run with the land, that the required covenants cannot be changed or
deleted without concurrence from the NC DEMLR, and that they will be recorded prior to the sale of any
lot.
Vill. CONSULTANT INFORMATION AND AUTHORIZATION
Applicant: Complete this section if you wish to designate authority to another individual
consulting engineer and/or firm) so that they may provide information on your behalf for
addressing requests for additional information).
Consulting
la
APR 2 9 201
Consulting Firm: Paramounte Engineering, Inc. BY:
Mailing Address:5911 Oleander Drive, Suite 201
City:Wilmington State:NC Zip:28403
Phone: (910 ) 791-6707 Fax: (910 ) 791-6760
Email:rballandAparamounte-eng.com
DL PROPERTY OWNER AUTHORIZATION (if Contact Information, item 2 has been filled out, complete this
section)
I, (print or type name of person listed in Contact Information, item 2a) , certify that I
own the property identified in this permit application, and thus give permission to (print or type name of person
listed in Contact Information, item 1a) with (print or type name of organization listed in
Contact Information, item 1a) to develop the project as currently proposed. A copy of
the lease agreement or pending property sales contract has been provided with the submittal, which indicates the
party responsible for the operation and maintenance of the stormwater system.
As the legal property owner I acknowledge, understand, and agree by my signature below, that if my designated
agent (entity listed in Contact Information, item 1) dissolves their company and/or cancels or defaults on their
lease agreement, or pending sale, responsibility for compliance with the DEMLR Stormwater permit reverts back
to me, the property owner. As the property owner, it is my responsibility to notify DEMLR immediately and submit
a completed Name/Ownership Change Form within 30 days; otherwise I will be operating a stormwater treatment
facility without a valid permit. I understand that the operation of a stormwater treatment facility without a valid'
permit is a violation of NC General Statue 143-215.1 and may result in appropriate enforcement action including
the assessment of civil penalties of up to $25,000 per day, pursuant to NCGS 143-215.6.
Signature: _ Date:
Form SWU-101 Version Oct. 31, 2013 Page 5 of 6

a Notary Public for the State of
County of , do hereby certify that
personally appeared before me this day of , and acknowledge the
due execution of the application for a stormwater permit. Witness my hand and official seal,
SEAL
My commission expires
X. APPLICANTS CERTIFICATION
I, (print or type name of person listed in Contact Information, item 9a) Dr. Terri Cobb
certify that the information included on this permit application form is, to the best of my knowledge, correct and
that the project will be constructed in conformance with the approved plans, that the required deed restrictions
and protective covenants will be recorded, and that the proposed project complies with the requirements of the
applicable stormwater unde��r��15�pA NCAC 2H .1000 and any other applicable state stormwater requirements.
Signature: „ Q)U Date:
�-{ a
I, 1E, 120.6,et k \A ` 6 rdh e r , a Notary Public for the State of ' C `
County of P2v% der , do hereby certify that rr C 0 66
personally appeared before me this I` day of �c , 9.2 0 (Q, and acknowledge the
due ex lion of the application for asWrmwater permit. Witness my hand and official seal,
OFFICIAL SEAL
NG
ELIZABETH W. GARDNER
My Cmvd aion „ 1
RECEIVE
APR 2 9 2016
BY:
Form SWU-101 Version Oct. 31, 2013 Page 6 of 6

Permit No..� 0D 0K0T` 0
(to be provided by DWQ)
STORMWATER MANAGEMENT PERMIT APPLICATION FORM Dwa
WDENR 401 CERTIFICATION APPLICATION FORM
INFILTRATION BASIN SUPPLEMENT
. This form must be tilled out printed and submitted.
The Required Items Checklist (Part laJ must be printed, idled out and submitted along with all of the required information.
E. PROJECT INFORMATION
Project Name
Surf City K-8 School
Contact Person
Robert Ballard, PE
Phone Number
910.791.6707
Date
05.11.16
Drainage Area Number
1
II. DESIGN INFORMATION
Site Characteristics
Drainage area
471,130.00 fe
Impervious area
247,100.00 if
Percent impervious
52.45 %
Design rainfall depth
3.72 in
Peak Flow Calculations
1-yr, 24-hr rainfall depth
0th in
1-yr,24-hrintensity
0114 inlhr
Pre -development 1-yr, 24-hr discharge
14(14
Post -development 1-yr, 24-hr discharge
—ft'/sec
UTAr ft3/sec
Pre/Post 1-yr, 24-hr peak flow rontml
fOr ft'lsec
Storage Volume: Non -SA Waters
Minimum design volume required
tk ft3
„C,AA
Design volume provided
N lk g
� f 0 ",
�� ��11A
Storage Volume: SA Waters
�OQ`OFESSIpO�l�i9
1.5" runoff volume
30743.00 ft3
: Q`
Pre -development 1-yr, 24-hr runoff volume
28,325.00 ft3
ril
Post -development 1-yr, 24-hr runoff volume
96,041.00 ft3
= 040501
Minimum required volume
67716.00 ft3•
•' ��•��
Volume provided
74,455.00 ft3 OK
�•
Soils Report Summary
,O,9ti GINE��.f;-�;
'�� DEL F�.�`�
Soil tYPa
Leon Fine Sand'
•
,�i�urru�`�
Infiltration rate
3.13 inlhr
SHWT elevation
34.00 fmsl
Basin Design Parameters
Drawdown time
2.20
days OK
Basin side slopes
3.00
:1 OK
Basin bottom elevation
35.00
fmsl
Storage elevation
36.00
fmsl *-LfhtOgrfl�a ftp
\ 1
Storage Surface Area
11,060.00
if
Top elevation
37.00
fmsl
Basin Bottom Dimensions
Basin length
79.00
ft
Basin width
124.24
ft
Bottom Surface Area
9,815.00
e
ECEIVE
" MAY 1 1 20%
Form SW401-Inflltration Basin-Rev.5 11Apr2011 Parts I. & II. Design Summary, Page 1 of 2

Permit
(to be provided by DWQ)
Additional Information
Maximum runoff to each inlet to the basin?
NIAr
ao-in
Length of vegetative filter for overflow
N/A
ft
Distance to structure
>15
ft
Distance from surface waters
>50
ft
Distance from water supply well(s)
>100
ft
Separation from impervious soil layer
>1
ft
Naturally occuring soil above shwt
0.67
ft
Bottom covered with 44n of clean sand?
Y
(Y or N)
Proposed drainage easement provided?
V4 —(Y or N)
Capures all runoff at ultimate build -out?
Y
(Y or N)
Bypass provided for larger storms?
Y
(Y or N)
Pretreatment device provided
Wet Pond
OK
OK
OK
OK
OK 4,115400DA94 WMQ
OK
OK
OK
ECEIVE
mAyi120%
BY:
Form SW401-Infiltration Basin-Rev.5 11Ap2011 Parts I. & II. Design Summary, Page 2 of 2

� w QJ
Permit No. �r,Sw p l o4o
(to be provided by DKV)
Q' A STORMWATER MANAGEMENT PERMIT APPLICATION FORM ma
NCDENR 401 CERTIFICATION APPLICATION FORM
INFILTRATION BASIN SUPPLEMENT
This forin must be filled out printed and submitted.
The Required Items Checklist (Part Ill) must be printed, filled out and submitted along with all of the required information.
I. PROJECT INFORMATION
Project Name
Surf City K-8 School
Contact Person
Robert Balland, PE
Phone Number
910.791.6707
Date
05.11.16
Drainage Area Number
2
II. DESIGN INFORMATION
Site Characteristics
Drainage area
210,375.00
fig
Impervious area
99,125.00
ff
Percent impervious
47.12
%
Design rainfall depth
3.72
in
Peak Flow Calculations
�-
1-yr, 24-hr rainfall depth
In
1-yr, 24-hr intensity
�
in/hr
Pre -development 1-yr, 24-hr discharge
NIAP
ft/sec,
Post -development 1-yr, 24-hr discharge
Ar
a/sec
Pre/Post 1-yr, 24-hr peak flow control
Kxk
ff3/sec
Storage Volume: Non -SA Waters
Minimum design volume required
ft3
Design volume provided
ft3
Storage Volume: SA Waters
1.5"
.%``�ZN CAfj '
.`�� OQ` ........
O '•
runoff volume
12466.00
ft�
�: ••®� :�'
Pre -development 1-yr, 24-hr runoff volume
19,078.00
ft3
Post -development 1-yr, 24-hr runoff volume
39,337.00
f?
= '�� AL TT ==
Minimum required volume
20259.00
f?
040501 =
Volume provided
23,225.00
fe OK
' : pS.
Soils Report Summary
R,`
Soil type
Leon Fine Sand
�//E�'J. F\5
Infiltration rate
2.15
in/hr
'<<r„1,,,,��```
SHWT elevation
32.00
fmsl
Basin Design Parameters
Drawdown time
1.65
days OK
Basin side slopes
3.00
:1 OK
Basin bottom elevation
33.00
fmsl Peso "—
1,000m "". -+ ke ^+ lo��+ �_rr 'ti.,,&U49
Storage elevation
34.00
fmslp
Storage Surface Area
6,685.00
if
— -1
Top elevation
35.00
fmsl
Basin Bottom Dimensions
Basin length
93.00
ft
Basin width
61.56
ft
Bottom Surface Area
5,725.00
ftz
ECEIVE
MAY 1 1 2016
Fom SW401-Infi@ration Basin-Rev.5 11Apr2011 Parts I. & II. Design Summary, Page 1 of 2

Permit No.
(to be provided by DWQ)
Additional Information
Maximum runoff to each inlet to the basin?
�1 a
ao-in
Length of vegetative filter for overflow
_
N/A
ft
OK
Distance to structure
>15
ft
OK
Distance from surface waters
>50
ft
OK
Distance from water supply well(s)
>100
ft
OK
Separation from impervious soil layer
>1
ft
OK
Naturally occuring soil above shwt
0.67
It
Bottom covered with 4-in of clean sand?
Y
(Y or N)
OK~ QrMR
Proposed drainage easement provided?
!3
(Y or N)
Capures all runoff at ultimate build -out?
Y
(Y or N)
OK
Bypass provided for larger storms?
Y
(Y or N)
OK
Pretreatment device provided
Wet Pond
nECEIVED
MAY tt20
BY•
Form SW401-Infiftration Basin-Rev.5 11Api2011 Parts I. & II. Design Summary, Page 2 of 2

WDENR
STORMWATER MANAGEMENT PERMIT APPLICATION FORM
401 CERTIFICATION APPLICATION FORM
LEVEL SPREADER - VEGETATED FILTER STRIP (LS-VFS) SUPPLEMENT
This form must be completely filled out, printed, initialed, and submitted.
I. PROJECT INFORMATION
Project name
Surf City K-8 School
Contact name
Robert Balland, PE
Phone number
910.791.6707
Date
05.17.16
Drainage area number
3
II. DESIGN INFORMATION
The purpose of the LS-VFS
Other. Explained below
Stormwater enters LS-VFS from
A BMP
Type of VFS
Engineered filter strip (graded & sodded, slope < 8%)
Explanation of any "Other' responses above
No Direct Discharge to SA Waters Provision of the Coastal Stormwater Rule Option 3B
If Stormwater Enters the LS-VFS from the Drainage Area
Drainage area
le Do not complete this section of the form.
Impervious surface area
fe Do not complete this section of the form.
Percent impervious
_ % Do not complete this section of the form.
Rational C coefficient
Do not complete this section of the form.
Peak flow from the 1 inlhr storm
cfs Do not complete this section of the form.
Time of concentration
min Do not complete this section of the form.
Rainfall intensity, 10-yr storm
in/hr Do not complete this section of the form.
Peak flow from the 10-yr storm
cis Do not complete this section of the form.
Design storm
10-year storm
Maximum amount of flow directed to the LS-VFS
cis Do not complete this section of the form.
Is a flow bypass system going to be used?
(Y or N) Do not complete this section of the form.
Explanation of any "Other" responses above
If Stormwater Enters the LS-VFS from a BMP
Type of BMP Wet detention pond ����
Peak discharge from the BMP during the design storm 2.14 ds
Peak discharge from the BMP during the 10-year storm 8.93 ds
Maximum capacity of a 100-foot long LS-VFS 10 cis MAY 18 kwu
Peak flow directed to the LS-VFS 8.93 ON
Is a flow bypass system going to be used? N (Y or N)
Explanation of any "Other" responses above
T
L
040501
�•�o�k�EIs L J • �'\
Form SW401 LS-VFS - 29June2012 - Rev.10 page 1 of 3

LS-VFS Design
Forebay surface area
Depth of forebay at stormwater entry point
Depth of forebay at stormwater exit point
Feet of level lip needed per cis
Computed minimum length of the level lip needed
Length of level lip provided
Width of VFS
Elevation at downslope base of level lip
Elevation at the end of the VFS that is farthest from the LS
Slope (from level lip to the end of the VFS)
Are any draws present in the VFS?
Is there a collector swale at the end of the VFS?
Bypass System Design (if applicable)
Is a bypass system provided?
Is there an engineered flow splitting device?
Dimensions of the channel (see diagram below):
M
B
W
y (flow depth for 10-year storm)
freeboard (during the 10-year storm)
Peak velocity in the channel during the 10-yr storm
Channel lining material
Does the bypass discharge through a wetland?
Does the channel enter the stream at an angle?
Explanation of any 'Other" responses above
sq ft
in
in
10
fvcfs
89
It
100
It
60
It
30.00
fmsl
29.25
fmsl
1.25
%
N
(Y or N)
N
(Y or N)
N (Y or N)
(Y or N)
n
ft
It
ft
ft
Mac
Pick one:
OK
(Y or N)
(Y or N)
W
T freeUoaza rdmim the
y i cliuvig dte >y,: rm;)
1--------- 1
� - 1�1
i B +
ECEIVED
MAY 18 2016
BY:
Form SW401 - LS-VFS - Mune2012 - Rev.10 page 2 of 3

III. REQUIRED ITEMS CHECKLIST
EDIT 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.
Requried Item:
Initials
Page or plan sheet number and any notes:
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),Irt
Forebay (if applicable),
High flow bypass system,
Maintenance access,
Proposed drainage easement and public right of way (ROW), and
- Boundaries of drainage easement
2. Plan details (1" = 30' or larger) for the level spreader showing:
- Forebay (if applicable),
G-1� Z,
High flow bypass system,
One foot topo lines between the level lip and top of stream bank,
Proposed drainage easement, and
Design at ultimate build -out.
3. Section view of the level spreader (1' 20' or larger) showing:
- Underdrain system (if applicable),
Level lip,
Upslope channel, and
Downslope filter fabric.
4. Plan details of the flow splitting device and supporting calculations (if applicable).
5. A construction sequence that shows how the level spreader will protected from
G' & DI
sediment until the entire drainage area is stabilized.
6. If a non -engineered VFS is being used, then provide a photograph of the VFS showing
,
that no draws are present.
I
7. The supporting calculations.
8. A copy of the signed and notarized operation and maintenance (O&M) agreement.
ECE#VE
MAY 18 2016
BY:
Form SW401 - LS-VFS - 29June2012 - Rev.10 page 3 of 3

RA - 1DUKk
NCDENR
STORMWATER MANAGEMENT PERMIT APPLICATION FORM
401 CERTIFICATION APPLICATION FORM
LEVEL SPREADER - VEGETATED FILTER STRIP (LS-VFS) SUPPLEMENT
This form must be completely filled out, printed, initialed, and submitted
I. PROJECT INFORMATION
Project name
Contact name
Phone number
Date
Drainage area number
Surf City K-8 School
Robert Balland, PE
910.791.6707
05.17.16
4
II. DESIGN INFORMATION
The purpose of the LS-VFS
Other: Explained below
Stormwater enters LS-VFS from
A BMP
Type of VFS
Engineered filter strip (graded & sodded, slope < 8%)
Explanation of any "Other" responses above
No Direct Discharge to SA Waters Provision of the Coastal Stormwater Rule
If Stormwater Enters the LS-VFS from the Drainage Area
Drainage area
fl
Do not complete this section of the form.
Impervious surface area
fl
Do not complete this section of the form.
Percent impervious
%
Do not complete this section of the form.
Rational C coefficient
Do not complete this section of the form.
Peak flow from the 1 inlhr storm
ds
Do not complete this section of the form.
Time of concentration
min
Do not complete this section of the form.
Rainfall intensity, 10-yr storm
inlhr
Do not complete this section of the form.
Peak flow from the 10-yr storm
ds
Do not complete this section of the form.
Design storm
10-year storm
Maximum amount of flow directed to the LS-VFS
ds
Do not complete this section of the form.
Is a flow bypass system going to be used?
(Y or N)
Do not complete this section of the form.
Explanation of any "Other" responses above
If Stormwater Enters the LS-VFS from a BMP
Type of BMP Wet detention pond
Peak discharge from the BMP during the design storm 0.66 ds
Peak discharge from the BMP during the 10-year storm 6.49 cis
Maximum capacity of a 100-foot long LS-VFS 10 cis
Peak flow directed to the LS-VFS 6.49 ds
Is a flow bypass system going to be used? N (Y or N)
Explanation of any "Other" responses above
Q�HCASS
040501
ECEIVED
MAY 18 2016
BY.•
Form SW401 LS-VFS - 29June2012 - Rev.10 page 1 of 3

LS-VFS Design
Forebay surface area
Depth of forebay at stormwater entry point
Depth of forebay at stormwater exit point
Feet of level lip needed per cfs
Computed minimum length of the level lip needed
Length of level lip provided
Width of VFS
Elevation at downslope base of level lip
Elevation at the end of the VFS that is farthest from the LS
Slope (from level lip to the end of the VFS)
Are any draws present in the VFS?
Is there a collector swale at the end of the VFS?
Bypass System Design (if applicable)
Is a bypass system provided?
Is there an engineered flow splitting device?
Dimensions of the channel (see diagram below):
M
B
W
y (flow depth for 10-year storm)
freeboard (during the 10-year storm)
Peak velocity in the channel during the 10-yr storm
Channel lining material
Does the bypass discharge through a wetland?
Does the channel enter the stream at an angle?
Explanation of any "Other" responses above
sq It
in
in
10
fycfs
65
It
70
It
75
It
34.00
fmsl
33.60
fmsl
0.53
%
N
(Y or N)
N
(Y or N)
N (Y or N)
(Y or N)
tt
ft
ft
ft
ft
fVsec
ricK one:
(Y or N)
(Y or N)
W
OK
V(Cf•Ud711g the 10-1,71: StoMj,1 ) Y
M.
z`z
ECEIVE
MAY 16 20%
BY:
Form SW401 - LS-VFS - Mune2012 - Rev.10 page 2 of 3

III. REQUIRED ITEMS CHECKLIST
EDIT 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.
Requried Item:
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),
Forebay (if applicable),
High flow bypass system,
Maintenance access,
Proposed drainage easement and public right of way (ROW), and
Boundaries of drainage easement.
2. Plan details (1" = 30' or larger) for the level spreader showing:
- Forebay (if applicable),
High flow bypass system,
One foot topo lines between the level lip and top of stream bank,
Proposed drainage easement, and
Design at ultimate build -out.
3. Section view of the level spreader (1" = 20' or larger) showing:
- Underdrain system (if applicable),
Level lip,
Upslope channel, and
Downslope filter fabric.
4. Plan details of the flow splitting device and supporting calculations (if applicable).
5. A construction sequence that shows how the level spreader will be protected from
sediment until the entire drainage area is stabilized.
6. If a non -engineered VFS is being used, then provide a photograph of the VFS showing
that no draws are present.
7. The supporting calculations.
S. A copy of the signed and notarized operation and maintenance (0&M) agreement.
Initials
0
Page or plan sheet number and any notes:
EA.*" % G -5' %0 - G- *4 aia
Cr C-T.2
G-" f.3
TXF G=7,3
v3r- C- 3.0 % \ G- 31 o3
RECEIVED
MAY 18 2016
BY:
Form SW401 - LS-VFS - 29June2012 - Rev.10 page 3 of 3

Permit No. 510a 4tOC/`7'f 0
(to be provided by D WQ)
CDENR
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 lll) must be printed, filled out and submitted along with all of the required information.
I. PROJECT INFORMATION
Project name Surf City K-8 School
Contact person Robert Balland, PE
Phone number 910.791.6707
Date 05.11.16
Drainage area number 1
II. DESIGN INFORMATION
Site Characteristics
Drainage area
471,130 if
Impervious area, post -development
247,1 00 ft
% impervious
52.45 %
Design rainfall depth
3.7 in
Storage Volume: Non -SA Waters
I -
Minimum volume required
N {�
------fl?
Volume provided
' ♦
Storage Volume: SA Waters
1.5" runoff volume
30,743 ft
Pre -development 1-yr, 24-hr runoff
28,325 ft3
Post -development 1-yr, 24-hr runoff
96,041 ft
Minimum volume required
67,716 ft3
Volume provided 74,455 ft3
Peak Flow Calculations
Is the pre/post control of the 1yr 24hr storm peak flow required?
Y (Y or N)
1-yr, 24-hr rainfall depth
in
Rational C, pre -development
(unitiess)
Rational C, post -development
4 (unitiess)
Rainfall intensity: 1-yr, 24-hr storm
f in/hr
Pre -development 1-yr, 24-hr peak flow
1.98 ff/sec
Post -development 1-yr, 24-hr peak flow
12.84 fe/sec
Pre/Post 1-yr, 24-hr peak flow control
10.86 fe/sec
Elevations
Temporary pool elevation
35.90 fmsl
Permanent pool elevation
35.00 fmsl
SHWT elevation (approx. at the perm. pool elevation)
fmsl
Top of 1 Oft vegetated shelf elevation
35.00 fmsl
Bottom of 1 Oft vegetated shelf elevation
34.00 fmsl
Sediment cleanout, top elevation (bottom of pond)
30.00 fmsl
Sediment cleanout, bottom elevation
27.00 fmsl
Sediment storage provided
3.00 ft
Is there additiona! volume stored above the state -required temp. pool?
Y (Y or N)
Elevation of the top of the additional volume
35.9 fmsl
ECEIVE
MAY 1 1 2016
BY:
�"11111rUir�i
o�ZN CARD
t
�. Poi€sss0fz%
= .. Al
i 040501
qN/EL
Form SW401-Wet Detention Basin-Rev.9-4/18/12 Parts 1. 6 It. Design Summary, Page 1 of 2

Permit
(to be provided by DwQ)
II. DESIGN INFORMATION
Surface Areas
Area, temporary pool 85,070 fe
Area REQUIRED, permanent pool
24,734 fe
SAIDA ratio
5.25 (unitless)
Area PROVIDED, permanent pool, $e1 _p.j
79,800 *
OK
Area, bottom of 10ftvegetated shelf, AoLshelf
68,435 fe
Area, sediment cleanout, top elevation (bottom of pond), .geed
37,450 ff
Volumes
Volume, temporary pool
(4,455 ff
OK
Volume, permanent pool, � ��
303,120 fe
Volume, forebay (sum of forebays If more than one forebay)
62,480 fO
Forebay % of permanent pool volume
20.6% %
OK
SAIDA Table Data
Design TSS removal
90 %
Coastal SAIDA Table Used?
Y (Y or N)
Mountain/Piedmont SAIDA Table Used?
N (Y or N)
SAIDA ratio
5.25 (unitless)
Average depth (used in SAIDA table):
Calculation option 1 used? (See Figure 10-2b)
N (Y or N)
Volume, permanent pool, �e,,,,_,d
303.120 ft?
Area provided, permanent pool, 4.rm,00i
79,800 fe
Average depth calculated
ft
Need 3 ft min.
Average depth used in SAIDA, 4, (Round to nearest 0.5ft)
ft
Calculation option 2 used? (See Figure 10-2b)
Y (Y or N)
Area provided, permanent pool, $. ,,d
79,800 fe
Area, bottom of Oft vegetated shelf, Ad -Shelf
68,435 fe
Area, sediment cleanout, top elevation (bottom of pond), 4LPmd
37,450 fe
"Depth' (distance b/w bottom of I �rt shelf and top of sediment)
4.00 ft
Average depth calculated
3.60 ft
OK
Average depth used in SAIDA, 4, (Round to down to nearest 0.5ft)
3.5 ft
OK
Drawdown Calculations
Drawdown through orifice?
Y (Y or N)
C / C
C
Diameter of orifice ('If circular)
5.00 in
C !I G
Area of orifice (if -non -circular)
in'
MAY 11 20S
Coefficient of discharge (C))
0.60 (unitless)
Driving head (K)
0.2810.30 ft
Drawdown through weir?
N (Y or N)
BY:
Weir type
—(unitless)
Coefficient of discharge
(unitless)
Length of weir (L)
ft
Driving head (H)
ft
Pre -development 1-yr, 24-hr peak flow
1.98 fe/sec
Post -development 1-yr, 2441r peak flow
12.84 Wisec
Storage volume discharge rate (through discharge dfice or weir)
0.3510.36 f?isec
Qtnran,, Y^!umc Mad.a,v.grc_,`.t-!"an pm dam.404h .
Storage volume drawdown time
2.2712.38 days
Ine'ffirla.f A. ,j.u.�LAg;ijjWVr hp Whin 9- F a..j"
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 is:
3 :1
OK
6 :1
Incurinnk ehulr aln��
6.0 ft
Irte ,.den# Qhalf Ien
6 :1
OK
5.8 :1
OK
Y (Y or N)
OK
>I=1 R
OK
N (Y or N)
OK
1(YorN)
OK
Y (Y or N)
OK
Pump
Form SW401-Wet Detention Basin-Rev.9-4/18/12 Parts I. & II. Design Summary, Page 2 of 2

Permit No.- W 916y41O
(to be provided by DWQ)
NLDENR
STORMWATER MANAGEMENT PERMIT APPLICATION FORM
401 CERTIFICATION APPLICATION FORM
WET DETENTION BASIN SUPPLEMENT
This form mustbe riiied ou4 Printed and submitted.
The Required Items Checklist (Part ///) must be printed, filled out and submitted along with all of the required information.
I. PROJECT INFORMATION
Project name
Surf City K-8 School
Contact person
Robert Balland, PE
Phone number
910.791.6707
Date
05.17.16
Drainage area number
2
Ill. DESIGN INFORMATION
Site Characteristics
Drainage area
210,375 fe
Impervious area, post -development
99,125 fe
% impervious
47.12 %
Design rainfall depth
3.7 in
Storage Volume: Non -SA Waters
Minimum
MIA.
volume required
fe
Volume provided
Nlt" fe
Storage Volume: SA Waters
1.5" runoff volume
12,466 fe
Pre -development 1-yr, 24-hr runoff
19,078 fe
Post -development 1-yr, 24-hr runoff
39,337 fe
Minimum volume required
20,259 fe
Volume provided 23,225 fe
Peak Flow Calculations
Is the prelpost control of the 1yr 24hr storm peak flow required?
Y (Y or N)
0,1 r+i 1 r r 1 ",
1-yr, 24-hr rainfall depth
Rational C, pre -development
A0 in
(unitless)
�.0tr1 Cii�/�O`'..00
J.
Q � '•••,/
�� ,.••'E
°y9 '.
Rational C, post -development
Rainfall intensity: 1-yr, 24-hr storm
(unitless)
in/hr�
?•'Q•fl�
�.
Pre -development 1-yr, 24-hr peak flow
1.49 fO/sec
i•�"`'�p�OtJ�i('L�
Post development 1-yr, 24-hr peak flow
3.05 tt3/sec
Pre/Post 1-yr, 24-hr peak flow control
1.56 fe/sec
_ °"° I� .�
Elevations
`. •&' f.P
®.9 ' DINE
Temporary pool elevation
34.25 fmsl
Permanent pool elevation
33.00fmsl
SHWT elevation (approx. at the perm. pool elevation)
fmsl
Top of 1 Oft vegetated shelf elevation
33.00 fmsl
Bottom of 1 Oft vegetated shelf elevation
32.00 fmsl
Sediment cleanout, top elevation (bottom of pond)
27.00 fmsl
Sediment cleanout, bottom elevation
26.00 fmsl
Sediment storage provided
1.00 ft
Is there additional volume stored above the state -required temp. pool?
Y (Y or N)
E C E 1 V E
Elevation of the top of the additional volume
34.3 fmsl OK
MAY 18 2016
BY:
Form SW401-Wet Detention Basin-Rev.9-4/18/12
Parts I. 8 It. Design Summary, Page 1 of 2

Permit
(to be provided by DWQ)
Ill. DESIGN INFORMATION
Surface Areas
Area, temporary pool 20,160 fe
Area REQUIRED, permanent pool
SAIDA ratio
Area PROVIDED, permanent pool, �er�_pd
Area, bottom of 1Oft vegetated shelf, At -,hag
Area, sediment cleanout, top elevation (bottom of pond), &_Wnd
Volumes
Volume, temporary pool
Volume, permanent pool, ye u cj
Volume, forebay (sum of forebays if more than one forebay)
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,
Area provided, permanent pool, 4.,,,,,w
Average depth calculated
Average depth used in SAIDA, q , (Round to nearest 0.5ft)
Calculation option 2 used? (See Figure 10-2b)
Area provided, W
anent pool, �._p j
Area, bottom of vegetated shelf, Aa-A.n
Area, sediment cleanout, top elevation (bottom of pond), &t�md
"Depth" (distance btu bottom of I. ft shelf and top of sediment)
Average depth calculated
Average depth used in SAIDA, 4, (Round to down to nearest 0.5ft)
Drawdown Calculations
Drawdown through orifice?
Diameter of orifice (if circular)
Area of orifice ('If -non -circular)
Coefficient of discharge (Co)
Driving head (K)
Drawdown through weir?
Weir type
Coefficient of discharge (Cr,,)
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 dfice 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 is:
8,562 fly
4.07 (unitless)
16,580 f? OK
91020 if
3,690 fe
23,225 fe OK
52,630 fe
10,588 ff3
20.1 % % OK
90 %
Y (Y or N)
N (Y or N)
4.07 (unitless)
N (Y or N)
52,630 ft
16,580 If
ft Need 3 ft min.
It
Y (Y or N)
16,580 fe
9,020 If
3,690 ff
5.00 It
3.90 It OK
4.0 ft OK
Y (Y or N)
2.50 in
11016 in?
0.60 (unitless)
0.3710.42 It
N (Y or N)
(unitless)
(unitless)
ft
OF It
1.49 fe/sec
3.05 fe/sec
0.1010.11 fe/sec
2.35 12.54 days
3 :1
6 :1
6.0 ft
4 :1
3.9 :1
Y (Y or N)
>/=1 it
N (Y or N)
% (Y or N)
Y (Y or N)
uioular aiat. y .tui6 teal 1 pie- a, � y.....w"' `J M ¢4
Inn•.k.. a V-_ ,.a —,c 11 . ♦ v.. mod•., ` V 4
_.._
OK
OK
OK
OK
OK
OK
OK
OK
JECEIVI
MAY 18 2016
BY:
Form SW401-Wet Detention Basin-Rev.94/18/12 Parts I. & It. Design Summary, Page 2 of 2

Permit No../�U F/W`�'L0
(to be provided by DWQ)
ATA Cgti ...4A7::p
MCDENR =
STORMWATER MANAGEMENT PERMIT APPLICATION FORM
401 CERTIFICATION APPLICATION FORM
WET DETENTION BASIN SUPPLEMENT
lids iurrn must be idled uui, printed aril submitted.
The Required Items Checklist (Part ///) must be printed, filled out and submitted along with all of the required information.
I. PROJECT INFORMATION
Project name
Contact person
Phone number 910.791.6707
Date 05.17.16
Drainage area number 3
Surf City K-B School
Robert Balland, PE
11. DESIGN INFORMATION
Site Characteristics
Drainage area
431,420 fe
Impervious area, post -development
153,000 fe
% impervious
35.46 %
Design rainfall depth
3.7 in
Storage Volume: Non -SA Waters
Minimum volume required
Volume provided
Storage Volume: SA Waters
1,5" runoff 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 1yr 24hr storm peak flow required?
1-yr, 24-hr rainfall depth
Rational C, pre -development
Rational C, post -development
Rainfall intensity: 1 -yr, 24-hrstorm
Pre -development 1-yr, 24-hr peak flow
Post -development 1-yr, 24-hr peak flow
Pre/Post 1-yr, 24-hr peak flow control
Elevations
Temporary pool elevation
Permanent pool elevation
SHWT elevation (approx. at the perm. pool elevation)
Top of 1 Oft vegetated shelf elevation
Bottom of 1Oft vegetated shelf elevation
Sediment cleanout, top elevation (bottom of pond)
Sediment cleanout, bottom elevation
Sediment gage provided
Is there additional volume stored above the state required temp. pool?
Elevation of the top of the additional volume
N►k fe
Ae fe
19,909 ff
35,104 fe
65,16E fe
30,064 fe
32,177 fe
N (Y or N)
in
(unitiess)
(unitless)
in/hr
2.66 ff/sec
21.76 ff/sec
19.10 felsec
31.50 fmsl
30.00 fmsl
fmsl
30.00 fmsl
29.00 fmsl
25.00 fmsl
24.00 fmsl
1.00 ft
Y (Y or N)
31.5 fmsl OK E V E I V E
r
MAY 18 2016
I3Y:
Form SW401Met Detention Basin-Rev.9-4/18/12 Parts I. & II. Design Summary, Page 1 of 2

Permit No.
(to be provided by DWQ)
II. DESIGN INFORMATION
Surface Areas
Area, temporary pool
Area REQUIRED, permanent pool
SAIDA ratio
Area PROVIDED, permanent pool,
Area, bottom of 1 Oft vegetated shelf, I60I �h m
Area, sediment cleanout, top elevation (bottom of pond), kbt-a.d
Volumes
Volume, temporary pool
Volume, permanent pool,
Volume, forebay (sum of forebays if more than one forebay)
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, —_Pod
Area provided, permanent pool,
Average depth calculated
Average depth used in SAIDA, 4, (Round to nearest 0.5ft)
Calculation option 2 used? (See Figure 10-2b)
Area provided, permanent pool, 4,rm _,�I
Area, bottom of 1 uft vegetated shelf, At Aait
Area, sediment cleanout, top elevation (bottom of pond), k-Pond
"Depth" (distance blw bottom of 1 ift shelf and top of sediment)
Average depth calculated
Average depth used in SAIDA, 4., (Round to down to nearest 0.5ft)
Drawdown Calculations
Drawdown through orifice?
Diameter of orifice (ifcircular)
Area of orifice (ff-non-circular)
Coefficient of discharge (CQ)
Driving head (F6)
Drawdown through weir?
Weir type
Coefficient of discharge (� )
Length of weir (L)
Driving head (H)
Pre -development 1-yr, 24fir peak flow
Post -development 1-yr, 24fir peak flow
Storage volume discharge rate (through discharge dfice 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 is:
20,762 fe
15,315 ff
3.55 (unitless)
19,660 ff Ol:
15,645 ff
6,625 tZ
32,177 fe OK
62,503 ff
12,625 ff
20.2% % OK
90 %
Y (Y or N)
N (Y or N)
3.55 (unitless)
N (Y or N)
62,503 ff
19,660 ff
ft
It
Y (Y or N)
19,660 If
15,645 ff
Need 3 ft min.
6,625 fe
4.00 ft
3.30 ft OK
3.5 ft OK
Y (Y or N)
T_3.00 in
PeTin
0.60 (unitless)
0.4710.50 ft
N (Y or N)
_(unitless)
(unitless)
ft
ft
2.66 ff/sec
21.76 fe/sec
0.1610.17 fe/sec Sw :�c ::cTc dsc`,ary� Ta%y"ieatei uiai, Vic-Jrv, ;A4!.,.
a
2.15 12.23 days ... ......,.....:.,_. M=t .,z,�.
3 :1 OK
6.0 ft IF.!: .ff.,c: , ;a oy1.
3 :1 OK
3.31 OK
Y (YorN) OK E�CEIVE
* 1ft OK
N.
(Y or N) OK MAY 18 2016
Pump BY•
Form SW401-Wet Detention Basin-Rev.9-4/18/12 Parts I. & H. Design Summary, Page 2 of 2

Permit No.✓w v Ay0Q0
(to be provided by DWQ)
r,�
NCDENR
STORMWATER MANAGEMENT PERMIT APPLICATION FORM
401 CERTIFICATION APPLICATION FORM
WET DETENTION BASIN SUPPLEMENT
t1i5 form must be Tilted out printed and submitted.
The Required Items Checklist (Part ///) must be printed, filled out and submitted along with all of the required information.
I. PROJECT INFORMATION
Project name Surf City K-8 School
Contact person Robert Ballard, PE
Phone number 910.791.6707
Date 05.17.16
Drainage area number 4
JIL DESIGN INFORMATION
Site Characteristics
Drainage area 196.715 fe
Impervious area, post -development 120,000 le
% impervious 61.00 %
Design rainfall depth 3.7 in
Storage Volume: Non -SA Waters ' 1
Minimum volume required At e
Volume provided k e
Storage Volume: SA Waters
1.5" runoff volume 14,729 f?
Pre -development 1-yr, 24-hr runoff 17,834 fe
Post -development 1-yr, 24-hr runoff 45,061 fe
Minimum volume required 27,227 fe
Volume provided 30,120 fe
Peak Flow Calculations
Is the pre/post control of the 1 yr 24hr storm peak flow required? Y (Y or N) ���`�.�H CARE
1-yr, 24-hr rainfall depth in Q� • FESSip
Rational C, pre -development (unitless) �: �� • '�
Rational C, post -development (unitiess) m
Rainfall intensity: )-yr, 24-hrstorm Or in/hr ';r�'liL• -_
Pre -development 1-yr, 24-hr peak flow 1.41 felsec _ 040501
Post -development 1-yr, 24-hr peak flow 14.71 ff/sec of.11 •Its
Pre/Post 1-yr, 24-hr peak flow control 13.30 if/sec; `
s `
Elevations �: � •' �!GI.NEE•'S`�
. F��.``•
Temporary pool elevation 35.00 fmsl ��� El J
Permanent pool elevation 34.00 fmsl
SHWT elevation (approx at the perm. pool elevation) fmsl
Top of 10ft vegetated shelf elevation 34.00 fmsl
Bottom of 1Oft vegetated shelf elevation 33.00 fmsl
Sediment cleanout, top elevation (bottom of pond) 29.00 fmsl
Sediment cleanout, bottom elevation 28.00 fmsl
Sediment storage provided 1.00 R
Is there additional volume stored above the state -required temp. pool? Y (Y or N)
Elevation of the top of the additional volume 35.0 fmsl OK nECEIVE
MAY18 2016
BY,
Form SW401-Wet Detention Basin-Rev.94/18/12 Parts I. & It. Design Summary, Page 1 of 2

Permit No.
(to be provided by DWQ)
II. DESIGN INFORMATION
Surface Areas
Area, temporary pool 31,920 fe
Area REQUIRED, permanent pool
SAIDA ratio
Area PROVIDED, permanent pool, ,%.,.,
Area, bottom of 1 Oft vegetated shelf, Aot_shelf
Area, sediment cleanout, top elevation (bottom of pond), Qbt�«d
Volumes
Volume, temporary pool
Volume, permanent pool, �gm-P.,
Volume, forebay (sum of forebays if more than one forebay)
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, �e,m-Pod
Area provided, permanent pool,
Average depth calculated
Average depth used in SAIDA, (k, (Round to nearest 0.5ft)
Calculation option 2 used? (See Figure 10-2b)
Area provided, permanent pool, J._p, ,
Area, bottom of 10ft vegetated shelf, AoLener
Area, sediment cleanout, top el v Ion (bottom of pond), 1t and
"Depth" (distance l: bottom o shelf and top of sediment)
Average depth calculated
Average depth used in SAIDA, (L, (Round to down to nearest 0.5ft)
Drawdown Calculations
Drawdown through orifice?
Diameter of orifice (if circular)
Area of orifice (if -non -circular)
Coeffident of discharge (Co)
Driving head (Ft)
Drawdown through weir?
Weir type
Coefficient of discharge (CN)
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 dfice 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 R orifice?
Freeboard provided
Vegetated filter provided?
Recorded drainage easement provided?
Capures all runoff at ultimate build -out?
Drain mechanism for maintenance or emergencies is:
13,986 fe
7.11 (unitless)
28,320 fe OY
21,660
7,000
30,120fe OK
81,905 ft3
16,113 f?
19.7% % OK
90 %
Y (Y or N)
N (Y or N)
7.11 (unitless)
N (Y or N)
81,905 fe
28,320 ftz
ft
ft
Y (Y or N)
28,320 If
21,660 If
Need 3 ft min.
7,000 fe
4.00 ft
3.10 ft OK
3.0 ft OK
Y (Y or N)
3.00 in
Air iw
0.60 (unitiess)
0.30 10.33 ft
N (Y or N)
(unitless)
(unifiess)
ft
ft
1.41 fe/sec
14.71 fe/sec
0.1310.14 fe/sec
2.4312.55 days
3 :1
6 :1
6.0 ft
6 :1
5.6 :1
Y (Y or N)
_>I=1 ft
N (Y or N)
1 (Y or N)
Y (Y or N)
c+C:..yz vo:ui,z'��.',.'.
OK
OK
OK
OK
OK
OK
OK
OK
ECE,VED
NAY 18 2016
Form SW401-Wet Detention Basin-Rev.9-4/18/12 Parts I. & II. Design Summary, Page 2 of 2