SW8020715_CURRENT PERMIT_20100416

STORMWATER DIVISION CODING SHEET
POST -CONSTRUCTION PERMITS
PERMIT NO.
SW�S�DZL�
DOC TYPE
CURRENT PERMIT
APPROVED PLANS
❑ HISTORICAL FILE
❑ COMPLIANCE EVALUATION INSPECTION
DOC DATE
YYYYMMDD
I

�
NC®ENR
North Carolina Department of Environment and
Division of Water Quality
Beverly Eaves Perdue Coleen H, Sullins
Governor
April 26, 2010
Director
Natural Resources
Mr. Erik Christofferson, Chief
Division of Engineering Services
North Carolina Wildlife Resources Commission
1720 Mail Service Center
Raleigh, NC 27699-1720
Subject: State Stormwater Management Permit No. SW8 020715MOD
Ocean Isle Beach Boating Access Area
High Density Commercial Infiltration Basin Project
Brunswick County
Dear Mr. Christofferson:
Dee Freeman
Secretary
The Wilmington Regional Office received a complete Stormwater Management Permit
Application for Ocean Isle Beach Boating Access Area on April 7, 2010. 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, effective September 1, 1995. We
are forwarding Permit No. SW8 020715MOD dated April 26, 2010, for the construction of the
subject project.
This permit shall be effective from the date of issuance until April 3, 2013, and shall be subject
to the conditions and limitations as specified therein. Please pay special attention to the
Operation and Maintenance requirements in this permit. Failure to establish an adequate
system for operation and maintenance of the stormwater management system 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 upon written request within thirty (30) days following
receipt of this permit. This request must, be in the form of a written petition, conforming to
Chapter 150B of the North Carolina General Statutes, and filed with the Office of Administrative
Hearings, P.O. Drawer 27447,Raleigh, NC 27611-7447. 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
Ms. Aisha Lau, or me at [phone].
Sincerely,
Georgett�Cott
Stormwater Supervisor
Division of Water Quality
GDSlahl: S:IWQSISTORMWATERIPERMIT1020715MOD.aprlo
cc: Mr. Daniel Cabe
Brunswick County Building Inspections
Jeff Phillips, Brunswick County Engineering
Division of Coastal Management
Wilmington Regional Office
Central Files
Wilmington Regional Office
127 Cardinal Drive Extension, Wilmington, North Carolina 28405 1�TOne 1
Phone: [phone] FAX: [phone] Customer Service: 1-877-623.6748 1 Y orth Carolina
Internet: www.ncwaterqualify.org A'j���N� l//�
An Equal Opportunity 1 AffirmaGvektion Employer '� �/ i

State Stormwater Management Systems
Permit No. SW8 020715MOD
STATE OF NORTH CAROLINA
DEPARTMENT OF ENVIRONMENT AND NATURAL RESOURCES
DIVISION OF WATER QUALITY
STATE STORMWATER MANAGEMENT PERMIT
HIGH DENSITY COMMERCIAL DEVELOPMENT
In accordance with the provisions of Article 21 of Chapter 143, General Statutes of
North Carolina as amended, and other applicable Laws, Rules, and Regulations
PERMISSION IS HEREBY GRANTED TO
Mr. Erik Christofferson and North Carolina Wildlife Resources Commission
Ocean Isle Beach Boating Access Area
Along NC 904, adjacent to DOT bridge, Ocean Isle Beach, Brunswick County
FOR THE
construction, operation and maintenance of 3 infiltration basin(s) and the continued
operation of 1 infiltration basin in compliance with the provisions of 15A NCAC 2H
.1000, effective September 1, 1995 (hereafter referred to as the "stormwater rules") and
the approved stormwater management plans and specifications and other supporting
data as attached and on file -with and approved by the Division of Water Quality and
considered a part of this permit.
This permit shall be effective from the date of issuance until April 3, 2013, and shall be
subject to the following specified conditions and limitations:
1. DESIGN STANDARDS
1. This permit is effective only with respect to the nature and volume of stormwater
described in the application and other supporting data.
2. This stormwater system has been approved for the management of stormwater
runoff as described in Section 1.6 on page 3 of this permit. The stormwater
controls have been designed to handle the runoff from 58,952 square feet of
impervious area.
3. These basins must be operated with a 50 foot vegetated filter strip.
4. The tract will be limited to the amount of built -upon area indicated on page 3 of
this permit, and per approved plans. There is no built -upon area allowance for
future development.
5. All stormwater collection and treatment systems must be located in either
dedicated common areas or recorded easements. The final plats for the project
will be recorded showing all such required easements, in accordance with the
approved plans.
6. The runoff from all built -upon area within the permitted drainage area of this
Page 2 of 7

State Stormwater Managemeht Systems
Permit No. SW8 020715MOD
project must be directed into the permitted stormwater control system.
7. The following design criteria have been permitted for the infiltration basin and
must be provided and maintained at design condition:
Basin 1
Basin 2
Basin 3
Basin 4
a.
Draina a Area acres:
0.69
0.37
0.05
0.62
Onsite, ft:
30258
16185
2297
27129
Offsite ft:
0
0
0
0
b.
Totallmperious
Surfaces, ft
26352
13480
1417
17703
c.
Desi n Storm, inches:
1.5
1.5
1.5
1.5
d.
Basin Depth, feet:
1.3
0.9
0.6
0.85
e.
Bottom Elevation,
FMSL:
8.7
9
6.5
6.15
f.
Bottom Surface Area,
W.
2.116
1,787
268
2,365
g.
Bypass Weir Elevation,
FMSL:
10
9.9
7.1
7
h.
Permitted Storage
Volume ft3:
3,315
1,821
196
2,288
i.
Type of Soil:
Fine sand
Fine sand
Fine sand
Fine sand
j.
Expected Infiltration
Rate, inlhr:
5
5.61
0.75
18
k.
Seasonal High Water
Table, FMSL:
6.2
6.9
4.5
4.15
I.
Time to Draw Down,
hours:
3.36
1.82
9.52
0.56
m
Receiving
Stream/River Basin:
Intracoastal Waterway / Lumber
n.
Stream Index Number:
15-25
o.
Classification of Water
Bod :
"SA, HQW"
II. SCHEDULE OF COMPLIANCE
The stormwater management system shall be constructed in its entirety,
vegetated and operational for its intended use prior to the construction of any
built -upon surface.
2. During construction, erosion shall be kept to a minimum and any eroded areas of
the system will be repaired immediately.
3. The permittee shall at all times provide the operation and maintenance
necessary to assure the permitted stormwater system functions at optimum
efficiency. The approved Operation and Maintenance Plan must be followed in its
entirety and maintenance must occur at the scheduled intervals including, but not
limited to:
a. Semiannual scheduled inspections (every 6 months).
b. Sediment removal.
C. Mowing and revegetation of slopes and the vegetated filter.
d. Immediate repair of eroded areas.
e. Maintenance of all slopes in accordance with approved plans and
specifications.
f. Debris removal and unclogging of bypass structure, infiltration media, flow
spreader, catch basins, piping and vegetated filter.
g. A clear access path to the bypass structure must be available at all times.
Page 3 of 7

State Stormwater Management Systems
Permit No. SW8 020715MOD
4. Records of maintenance activities must be kept and made available upon
request to authorized personnel of DWQ. The records will indicate the date,
activity, name of person performing the work and what actions were taken.
5. The facilities shall be constructed as shown on the approved plans. This permit
shall become voidable unless the facilities are constructed in accordance with the
conditions of this permit, the approved plans and specifications, and other
supporting data.
6. 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.
7. Upon completion of construction, prior to issuance of a Certificate of Occupancy,
and prior to operation of this permitted facility, a certification must be received
from an appropriate designer for the system installed certifying that the permitted
facility has been installed in accordance with this permit, the approved plans and
specifications, and other supporting documentation. Any deviations from the
approved plans and specifications must be noted on the Certification. A
modification may be required for those deviations.
8. Access to the stormwater facilities shall be maintained via appropriate recorded
easements at all times.
9. 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, built -upon area, details, etc.
b. Project name change.
C. Transfer of ownership.
d. Redesign or addition to the approved amount of built -upon area or to the
drainage area.
e. Further development, subdivision, acquisition, lease or sale of any, all or
part of the project area. The project area is defined as all property owned
by the permittee, for which Sedimentation and Erosion Control Plan
approval or a CAMA Major permit was sought.
f. Filling in, altering, or piping of any vegetative conveyance shown on the
approved plan.
10. Prior to the construction of any permitted future areas shown on the approved
plans, the permittee shall submit final site layout and grading plans to the
Division for approval.
11. A copy of the approved plans and specifications shall be maintained on file by
the Permittee at all times. At the time the permit is transferred to a new owner,
the permittee shall forward the approved plans to the new owner.
12. 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 4of7

State Stormwater Management Systems
Permit No. SW8 020715MOD
III, GENERAL CONDITIONS
This permit is not transferable to any person or entity except after notice to and
approval by the Director. In the event of a change of ownership, or a name
change, the permittee must submit a completed Name/Ownership Change form
to the Division of Water Quality, signed by both parties, and accompanied by the
supporting documentation as listed on page 2 of the form. The approval of this
request will be considered on its merits and may or may not be approved.
2. 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
nor the transfer of common area to a third party constitutes an approved transfer
of the stormwater permit.
3. Failure to abide by the conditions and limitations contained in this permit may
subject the Permittee to enforcement action by the Division of Water Quality, in
accordance with North Carolina General Statute 143-215.6A to 143-215.6C.
4. 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.
5. In the event that the facilities fail to perform satisfactorily, including the creation of
nuisance conditions, 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.
6. The permittee grants DENR Staff permission to enter the property during normal
business hours for the purpose of inspecting all components of the permitted
stormwater management facility.
7. The permit remains 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
reissuance, renewal or termination does not stay any permit condition.
8. 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.
9. Approved plans and specifications for this project are incorporated by reference
and are enforceable parts of the permit.
10. The permittee shall notify the Division in writing of any name, ownership or
mailing address changes at least 30 days prior to making such changes.
11. The permittee shall submit a permit renewal application 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 26th day of April, 2010.
NORTH CAROLINA ENVIRONMENTAL MANAGEMENT COMMISSION
een ry z)uiiins, wire
Page 5 of 7

State Stormwater Management Systems
Permit No. SW8 020715MOD
Division of Water Quality
By Authority of the Environmental Management Commission
Ocean Isle Beach Boating Access Area
Stormwater Permit No. SW8 020715MOD
Brunswick 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 specification:
Signature
Registration Number
Date
SEAL
Page 6of7

State. Stormwater Management Systems
Permit No. SW8 020715MOD
Certification Requirements:
1. The drainage area to the system contains approximately the permitted
acreage.
2. The drainage area to the system contains no more than the permitted
amount of built -upon area.
3. All the built -upon area associated with the project is graded such that the
runoff drains to the system.
4. All roof drains are located such that the runoff is directed into the system..
5. The outlet / bypass structure weir elevation is per the approved plan.
6. The outlet / bypass structure is located per the approved plans.
7. A Trash Rack is provided on the outlet / bypass structure.
8. All slopes are grassed with permanent vegetation.
9. Vegetated slopes are no steeper than 3:1.
10. The inlets are located per the approved plans and do not cause short-
&cuiting of the system.
11. The permitted amounts of surface area and/or volume have been
provided.
12. All required design depths are provided.
13. All required parts of the system are provided.
14. The required system dimensions are provided per the approved plans.
15. All components of the stormwater BMP are located in either recorded
common areas or recorded easements.
CC" NCDENR-DWQ Regional Office
Brunswick County Building Inspections
Page 7 of 7

DWQ USE ONLY
Date Received
Fee Paid
Permit Number
Gfd�l'�GE�� 7/Hr�S�E�
State of North Carolina
Department of Environment and Natural Resources
Division of Water Quality
STORMWATER MANAGEMENT PERMIT APPLICA' 1lorNIM
This form nzay be photocopied for use as an original NOV 0 3 2009
1. GENERAL INFORMATION
"I
1. Applicants name (specify the name of the corporation, individual, etc. who owns the project):
North Carolina Wildlife Resources Commission
2. Print Owner/Signing Official's name and title (person legally responsible for facility and compliance):
Erik Christofferson, Chief, Division of Engineering Services
3. Mailing Address for person listed in item 2 above:
1720 Mail Service Center
City:Raleigh State:NC Zip:27699-1720
Phone: (91.9 ) 707-0150 _ Fax: (919 707T0162
Email:erik.christofferson®ncwildlife.org
4. Project Name (subdivision, facility, or establishment name - should be consistent with project name on plans,
specifications, letters, operation and maintenance agreements, etc.):
Ocean Isle Beach Boating Access Area
5. Location of Project (street address):
Along NC 904, adiacent to DOT bridge, end of Causewav Drive
City:Ocean Isle Beach County:Brunswick Zip:28645
6. Directions to project (from nearest major intersection):
Site is approximately 1 mile south of the intersection of HWY 904 and 79. Site is located in old road bed_
adjacent to existing DOT bridge
7. Latitude:330 53' 40" N
Lon gitude: 780 26' 23" W of project
8. Contact person who can answer questions about the project:
Name:Daniel Cabe Telephone Number: (919 ) 218-4149
Email:[e-mail]
IL PERMIT INFORMATION:
1. Specify whether project is (check one): []New ❑Renewal ®Modification
Form SWU-101 Version 09.25.08 Pagel of4

2. If this application is being submitted as the result of a renewal or modification to an existing permit, list the
existing permit numberSWB 020715 and its issue date (if known)April 3, 2003
3. Specify the type of project (check one):
❑Low Density ®High Density ❑Redevelop ❑General Permit ❑Universal SMP ❑Other
4. 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 ❑Sedimentation/Erosion Control ❑404/401 Permit ❑NPDES Industrial Stormwater
Ill. PROJECT INFORMATION
1. In the space provided below, summarize how stormwater will be treated. Also attach a detailed narrative
(one to two pages) describing Stormwater management for the project.
Stormwater from the parking area flows to one of two splitter boxes. The first 1.5" will _enter an infiltration basin _
with the excesss bypassing to a veg. filter. The stormwater from entrance road will be captured by a drop inlet _
and enter a third splitter box that directs the first 1.5" to an infitration basin and -bypass the rest to a veg. filter.
2. Stormwater runoff from this project drains to the Lumber River basin.
3. Total Property Area: 3.57 acres 4. Total Coastal Wetlands Area: 0.54 acres
5. Total Property Area (3) - Total Coastal Wetlands Area (4) = Total Project Area**:3.03
acres
6. (Total Impervious Area / Total Project Area) X 100 = Project Built Upon Area (BUA):48 %
7. How many drainage areas does the project have?3 New
8. Complete the following information for each drainage area. If there are more than two drainage areas in the
project, attach an additional sheet with the information for each area provided in the same format as below.
For high density projects, complete the table with one drainage area for each engineered stormwater device.
Basin Information
Drainage Area 1
Drainage Area 2
Receiving Stream Name
Intracoastal Waterway
Intracoastal Waterway
Stream Class & Index No.
SA
SA
Total Drainage Area (so
30,258
16,185
On -site Drainage Area (so
30,258
16,185
Off -site Drainage Area (so
Existing Impervious* Area (so
17,352
8,980
Proposed Impervious*Area (so
26,352
13,480
Impervious* Area (total)
87.1 %
83%
Impervious* Surface Area
Drainage Area 1
Drainage Area 2 '
On -site Buildings (so
On -site Streets (so
On -site Parking (so
25,000
12,500
On -site Sidewalks (so
1,352
980
Other on -site (so
Off -site (so
Total (so:
26,352
13,480
* Impervious area is defined as the built upon area including, but not limited to, buildings, roads, parking areas,
sidewalks, gravel areas, etc,
**Total project area shall be calculated to exclude Coastal Wetlands front use when calculating the built upon area
percentage calculation. This is the area used to calculate overall percent project built upon krea (BUA).
Form SWU-101 Version 09.25.08 Page 2 of

Additional Drainage Areas
Application Item III - 8
4 z r 9 %
Basin Intormatioq
Drainage Area 3',
jWest Drainage Area 4* 1
Receiving Stream Name
Intracoastal Waterway
Intracoastal Waterway
Stream Class & Index No.
SA
SA
Total Drainage Area (sf)
2,297
27,129
On -site Drainage Area (st)
2,297
27,129
Off -site Drainage Area (so
Existing Impervious Area (so
1,417
17,703
Proposed Impervious Area (sf)
1,417
17,703
% Impervious Area (total)
61.7%
65.3%
Impervious Surface Ared_
Drainage Area 3
jWest Drainage Area 4**i
On -Site Buildings (sf)
On -Site Streets (sf) -
1,417
15,889
On -Site Parking (sf)
1,814
On -Site Sidewalks (sf)
Other On -Site (s
Off -Site (s1)
Total (sf):
1,417
17,703
** The previously permitted western drainage area will not be modified except for
paving over the existing gravel base.
By �f��Q?Opg �

, 9. How was the off -site impervious area listed above derived
Projects in Union County: Contact the DWQ Central Office staff to check to see if you project is located
within a Threatened & Endangered Species watershed that may be subject to more stringent stormwater
requirements,
IV. DEED RESTRICTIONS AND PROTECTIVE COVENANTS
One of the following property restrictions and protective covenants are required to be recorded for all
subdivisions, outparcels and future development prior to the sale of any Iot. If lot sizes vary significantly, a table
listing each lot number, size and the allowable built -upon area for each lot must be provided as an attachment.
Forms can be downloaded from http://li2o.enr.state.nc.us/su/bmp forms.htm - deed restrictions.
Form DRPC-1
High Density Commercial Subdivisions
Form DRPC-2
High Density Developments with Outparcels
Form DRPC-3
High Density Residential Subdivisions
Form DRPC-4
Low Density Commercial Subdivisions
Form DRPC-5
Low Density Residential Subdivisions
Form DRPC-6
Low Density Residential Subdivisions with Curb Outlets
By your signature below, you certify that the recorded property restrictions and protective covenants for this
project shall include all the applicable items required in the above form, 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 DWQ and that they will be recorded prior to
the sale of any Iot.
V. SUPPLEMENT FORMS
The applicable state stormwater management permit supplement form(s) listed below must be submitted for each
BMP specified for this project. Contact the Stormwater Permitting Unit at [phone] for the status and
availability of these forms. Forms can be downloaded from http://ii2o.enr.stite.nc.us/su/bmi2 forms.htm.
1
Form SW401-Low Density
Form SW401-Curb Outlet System
Form SW401-Off-Site System
Form SW401-Wet Detention Basin
Form SW401-Infiltration Basin
Form SW401-Infiltration Trench
Form SW401-Bioretention Cell
Form SW401-Level Spreader
Form SW401-Wetland
Form SW401-Grassed Swale
Form SW401-Sand Filter
Form SW401-Permeable Pavement
Form SW401-Cistern
Low Density Supplement
Curb Outlet System Supplement
Off -Site System Supplement
Wet Detention Basin Supplement
Infiltration Basin Supplement
Underground Infiltration Trench Supplement
Bioretention Cell Supplement
Level Spreader/Filter Strip/Restored Riparian Buffer Supplement
Constructed Wetland Supplement
Grassed Swale Supplement
Sand Filter Supplement
Permeable Pavement Supplement
Cistern Supplement
Dorm S WU-101 Version 09,25.08 Page 3 of 4

VI. SUBMITTAL REQUIREMENTS
Only complete application packages will be accepted and reviewed by the Division of Water Quality (DWQ).
A complete package includes all of the items listed below. The complete application package should be
submitted to the appropriate DWQ Office. (Appropriate office may be found by locating project on the
interactive online map atlittp://h2o.enr.state.nc.us/suhnsi maps.htnt)
Please indicate that you have provided the following required information by initialing in the space provided
next to each item.
Initials
• Original and one copy of the Stormwater Management Permit Application Form
• Original and one copy of the Deed Restrictions & Protective Covenants Form (if
required as per Part IV above) TT
• Original of the applicable Supplement Form(s) and O&M agreement(s) for each BMP l0 LL
• Permit application processing fee of $505 (Express: $4,000 for HD, $2,000 for LD)
payable to NCDENRZ
• Calculations & detailed narrative description of stormwater treatment/management
• Copy of any applicable soils report
• Two copies of plans and specifications (sealed, signed & dated), including:
- Development/Project name
- Engineer and firm
-Legend
- North arrow
- Scale
- Revision number & date
- Mean high water line
- Dimensioned property/project boundary
- Location map with named streets or NCSR numbers
- Original contours, proposed contours, spot elevations, finished floor elevations
- Details of roads, drainage features, collection systems, and stormwater control measures
- Wetlands delineated, or a note on plans that none exist
- Existing drainage (including off -site), drainage easements, pipe sizes, runoff calculations
- Drainage areas delineated
- Vegetated buffers (where required)
VIL AGENT AUTHORIZATION
If you wish to designate authority to another individual or firm so that they may provide information on your
behalf (such as additional information requests), please complete this section. (ex. designing engineer or firm)
Designated agent (individual or firm):Daniel Cabe
Mailing Address:1720 Mail
City:Raleigh ^_ _
Phone: [phone]
Email:daniel.cabe®ncwildlife.org
VII1. APPLICANT'S CERTIFICATION
State:NC Zip:27699-1720
Fax: (919 ) 494-3671
1, (print or type name of person listed in General Infornration, item 2) Erik Christofferson
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, nd that the proposed project complies with the requirements of 15A
NCAC 2H .1000. _ _ A J
Signature:
Date: ° lol
Form SWU-101 Version 09.25.08
Page 4 of 4

a

Permit No. .::5- A eWr,1 7A�
(to be provided by DWQ)
o�oF W qT FR°c
®� STORMWATER MANAGEMENT PERMIT APPLICATION FORM o Y
NCDENR 401 CERTIFICATION APPLICATION FORM
INFILTRATION BASIN SUPPLEMENT
This form must be filled out, printed and submitted.
The Regpired Items Checklist (Part !it) must be printed, filled out and submitted along with all of the required information.
!. PROJECT INFORMATION
Project Name Ocean Isle Beach BAA
Contact Person Daniel Cabe
Phone Number 919 218A149
Date 1-Apr-09
Drainage Area Number One (1) - Application, (Northern Drainage Area, Basin 1- Plan Sheets)
1l. DESIGN INFORMATION
Site Characteristics
Drainage area
30,258.00 ft2
Impervious area
26,352,00 ft2
Percent impervious
0.87 %
Design rainfall depth
1.50 in
Peak Flow Calculations
1-yr, 24-hr rainfall depth NA in
3-yr;+R"r intensity 10r r i 10.04` inlhr
Pre -development 1-yr, 24-hr discharge NA ft3/sec
Post -development 'V-�;,.34.brdischarge myrJ 5#*jh 5.95' —ft'/sec
Pre/Post 1-yr, 24-hr peak flow control #VALUE! ft'/sec
Storage Volume: Non -SA Waters
Minimum design volume required
ft'
Design volume provided
rya
Storage Volume: SA Waters
1.5" runoff volume
3154""
ft'
Pre -development 1-yr, 24-hr runoff volume
NA
ft3
Post -development 1-yr, 24-hr runoff volume
NA
ft3
Minimum required volume
#VALUE!
ft3
Volume provided
3304"
ft3
Soils Report Summary
Soil type
Fine Sand
Infiltration rate
5.0—
inlhr
SHWT elevation
6.20
fmsl
Basin Design Parameters
Drawdown time
Basin side slopes
Basin bottom elevation
Storage elevation
Storage Surface Area
Top elevation
Basin Bottom Dimensions
Basin length
Basin width
Bottom Surface Area
0.12
days OK
3.00
:1 OK
8.70
fmsl OK
10.00
fmsl
2,984.00
ftz
11.00
fmsl
irregular It
irregular ft
2.116.00
ft'
#VALUE!
Form SW441-InMration Basin-Rev.4 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?
0.87
ac-in
OK
Length of vegetative filter for overflow
50.00
ft
OK
Dstance to structure
350.00
ft
OK
Distance from surface waters
50,00
ft
OK
Distance from water supply well(s)
>350
ft
OK
Separation from impervious soil layer
NA
ft
OK
Naturally occuring soil above shwt
2.5"`
ft
OK
Bottom covered with 4-in of clean sand?
Y
(Y or N)
OK
Proposed drainage easement provided?
Y
(Y or N)
OK
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
Sputter Box
Form SW401-Infiltration Basin•Rev.4 Parts I. & II. Design Summary, Page 2 of 2

Permit N
(to be provided by DWQ)
111. 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.
Page! Plan
Initials
Sheet No.
Sf4:f
Sheets 2 & 3
0::4S6 s ?a9 i .
5V.L& 3
tC- Sheets4,5,&6
1J i ti Sheets 5 & 6
1J� Calcs Pg 2
L Exhibit G
401 Add.
Section 1
1. Plans (1" - 50' or larger) of the entire site showing:
Design at ultimate build -out,
- Off -site drainage (if applicable),
.APDelineated 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
- Boundaries of drainage easement.
2. Partial plan (1" = 30' or larger) and details for the infiltration basin showing:
Bypass structure,
- Maintenance access,
Basin bottom dimensions,
Basin cross-section with benchmark for sediment cleanout,
- Flow distribution detail for inflow,
-Vegetated filter, and
- Pretreatment device.
3. Section view of the infiltration basin (1" = 20' or larger) showing:
Pretreatment and treatment areas, and
Inlet and outlet structures.
4. A table of elevations, areas, incremental volumes & accumulated volumes to verify the volume provided.
5. A soils report that is based upon an actual field investigation, soil borings, and infiltration tests. The
results of the soils report must be verified in the field by DWQ, by completing & submitting the soils
investigation request form, County soil maps are not an acceptable source of soils information.
6. A construction sequence that shows how the infitlration basin will be protected from sediment until the
entire drainage area is stabilized.
7. The supporting calculations.
1t7�rt.- , 0 & M Agreer 8. A copy of the signed and notarized operation and maintenance (O&M) agreement.
NA 9. A copy of the deed restrictions (if required).
Form SW401-Infiltration Basin-Rev.4 Page 1 of 1 Part III. Required Items Checklist, Page 1 of 1

d 'w r }
,y , • ,
!. ' L+ J �

401 Certification Application .Form
Infiltration Basin Supplement
Drainage Area One (1)
Addendum
Notes Section 11
Peak Flow Calculations
The NC Wildlife is requesting to be vested in the pre -October 1, 2008
rules; therefore, the peals flow was calculated based on the 10-Year storm
with a time of concentration of 5 minutes instead of the 1-Year, 24-hr
storm.
Storage Volume SA Waters
* * Pre -October 1, 2009 rules require storage of the first 1.5 inches of rain.
Calculations were not completed for the Pre and post conditions. The
minimum required volume is contained within the proposed basin.
Soils report Summary
*** The soils report, Exhibit F, for boring B-2 provides an infiltration rate of
0.04 in/hr. S&ME was contacted to verify the infiltration rate. S&ME
replied that the infiltration test was completed in the least hydraulically
conductive soil present in the boring. Based on the infiltration rate at
boring B-1, of 5.61 in/hr and the infiltration from the previous soils report,
Exhibit G, of 18 and 18.5 in/hr, the NCWRC proposes to remove the soil
with the low infiltration rate and replace with soil which has a minimum
infiltration rate of 5 in/hr. This should be reasonable given the soils
available on -site.
Construction Sequence .
1. Complete rough grading of parking area, infiltration basin, level spreader,
and vegetative filter.
2. Complete fine grading of parking area and access road. Stabilize with
compacted ABC stone.
3. Pave parking area and access road. This eliminates sediment available to
enter the infiltration basin.
4. While completing 3 above, construct splitter box, forebay, and level
spreader.
5. Fine grade infiltration basin, level spreader supply channel, and vegetative
filter.
6. Stabilize graded areas with vegetation.

Of w"TEA
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P
NCDENR
STORMWATER MANAGEMENT PERMIT APPLICATION FORM
401 CERTIFICATION APPLICATION FORM
LEVEL SPREADER, FILTER STRIP AND RESTORED RIPARIAN BUFFER SUPPLEMENT
This form must be completely filled out, printed and submitted.
DO NOT FORGET TO ATTACH THE REQUIRED ITEMS CHECKLIST AND ALL REQUIRED ITEMS (NEXT WORKSHEET)I
I. PROJECT INFORMATION.. .
Project name
Ocen Isle Beach BAA
Contact name
Daniel Cabe
Phone number
919 218-4149
Date
November 6. 2009
Drainage area number
One (1) - Application, (Northern Drainage Area, Basin 1 - Plan Sheets)
11 . DESIGN INFORMATION
For Level Spreaders Receiving Flow From a BMP
Type of BMP
Drawdown flow from the BMP cis
For Level Spreaders Receiving Flow from the Drainage Area
Drainage area
30,258,00
fly
Impervious surface area
26,352.00
ft'
Percent impervious
87.09
%
Rational C coefficient
0.85
C ISI %'Mi ID
Peak flow from the 1 inlhr storm
0.59
cis
Time of concentration
5.00
min N O V 0, 9 2D09
Rainfall intensity, 1 0-yr storm
1o.o4 inlhr
Peak flow from the 10-yr storm
5.93
cfs
BY:
Where Does the Level Spreader Discharge?
To a grassed biorelention cell?
(Y or N)
To a mulched bioretendon cell?
(Y or N)
To a wetland?
(Y or N)
To a filter strip or riparian buffer?
Y
(Y or N) Please complete filter strip characterization below.
Other (specify)
Filter Strip or Riparian Buffer Characterization (if applicable)
Width of grass
Width of dense ground cover
Width of wooded vegetation
Total width
Elevation at downslope base of level lip
Elevation at top of bank of the receiving water
Slope (from level lip to to top of bank)
Are any draws present?
Level Spreader Design
Forebay surface area
Feet of level lip needed per cis
Answer "Y' to one of the following:
Length based on the 1 inlhr storm?
Length based on the 10-yr storm?
Length based on the BMP discharge rate?
Design flow
Is a bypass device provided?
Length of the level lip
Are level spreaders in series?
20.00 It
30.00
ft
ft
50.00
ft
9.67
fmsl
2.40
fmsl
14.54 % Level spreaders must be placed in series.
N (Y or N) OK
51.00 sgft
13 ftic%
(Y or N)
Y (Y or N)
(Y or N)
5.95 cis
N (Y or N)
78.00 It
N (Y or N)
OK
A bypass device is not needed.
Level spreader length OK.
Form SW401-Level Spreader, Filter Strip, Restored Riparian Buffer-Rev.5 Paris 1. and II. Design Summary, page 1 of 2

Bypass Channel Design (if applicable)
Does the bypass discharge through a welland?
Does the channel enter the stream at an angle?
Dimensions of the channel (see diagram below):
M
B
W
y
Peak velocity in the channel during the 10-yr storm
Channel lining material
M
1 B
(Y or N) Do not complete this section of the wAsheet.
(Y or N) Do not complete ft section of the workstreeL
Do not complete this section of the worksheet.
It Do not complete this section of the worksheet.
It Do not complete this section of the worksheet.
ft Do not complete this section of the worksheet.
ft Do riot compete this section of the worksheet.
cfs Do not complete this section of the worksheet.
Do not complete this section of the worksheat.
M
Form SW401-Level Spreader, Filter Strip, Restored Riparian Buffer-Rev.5 Pans I. and II, Design Summary, page 2 at 2

III. REQUIRED ITEMS CHECKLIST
Please indicate the page or plan sheet numbers where the supporting documentafion 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.
0 � �-
Sheet 2 &3
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.
LSheets
4,50
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.
Sheet 6
3. Section view of the level spreader (1" = 20' or larger) showing:
- Underdrain system (if applicable),
- Level tip,
Upslope channel, and
NA;
AttachedW
- Downslope filter fabric.
4. A date the filter that the type is
-stamped photograph of strip clearly shows of vegetation that present.
Addendum
5. A construction sequence that shows how the level spreader will be protected from sediment until the entire
drainage area is stabilized.
7-�-
Section 1
6. The supporting calculations.
QAttached
7. A copy of the signed and notarized operation and maintenance (08M) agreement.
NA 8. A copy of the deed restrictions (if required).
Form SW401-Level Spreader, Filter Strip, Restored Riparian Buffer-Rev.5 Part III, page 1 of 1

c _, 1.

401 Certification Application Form
Level Spreader Supplement
Drainage Area One (1)
Addendum
Notes Section H
Time of concentration calculations
The time of concentration is less than 5 minutes. Standard practice when this
occurs is to use a to = 5 min. This is the most conservative value contained in
reference material.
Filter Strip or Riparian Buffer Characterization
Width of Grass:
The width of the grass stated as 20' is approximate. Existing dense ground cover
already in place will be disturbed only to the extent required to install the level
spreader; this area will be reseeded with grass.
Slope:
The Level Spreader supplement notes state, level spreaders should be placed in
series based on the slope of 14.54 %. Compliance with regulations requiring a
50' setback from NHW prohibits placement of additional level spreaders between
the level spreader proposed and the waters edge. However, the area immediately
down flow of the level spreader has a slope of approximately 5%. Given the
infiltration rate of the in -situ soil in the level spreader supply channel and the
area immediately down flow of the level spreader minimal water flow is
anticipated in the lower extents of the filter strip which is well established
vegetation.
Notes Section M
Item 4 The attached photo is of the existing vegetation in the area of the filter
strips for Basin 1 and Basin 2. We did not have a recent photo of the
area. One can be provided via email if required.
Construction Seauence
l . Complete rough grading of parking area, infiltration basin, level spreader, and
vegetative filter.
2. Complete fine grading of parking area and access road. Stabilize with compacted
ABC stone.
3. Pave parking area and access road. This eliminates sediment available to enter
the infiltration basin.
4. While completing 3 above, construct splitter box, forebay, and lcvel spreader.
5. Fine grade infiltration basin, level spreader supply channel, and vegetative filter.
6. Stabilize graded areas with vegetation.

�SI.J�'b�d 2/6
of W ATFH
®TA � 'q
NCDENR
STORMWATER MANAGEMENT PERMIT APPLICATION FORM
401 CERTIFICATION APPLICATION FORM
LEVEL SPREADER, FILTER STRIP AND RESTORED RIPARIAN BUFFER SUPPLEMENT
This form must be completely tilled out, printed and submitted.
DO NOT FORGET TO ATTACH THE REQUIRED ITEMS CHECKLIST AND ALL REQUIRED ITEMS (NEXT WORKSHEET)l
1. PROJECT INFORMATION
Project name
Ocen We Beach BAA
Contact name
Daniel Cabe
Phone number
919 218A149
Date
November6, 2009
Drainage area number
Two(2) - Application, (Southern Drainage Area, Basin 2 - Plan Sheets)
II. DESIGN INFORMATION
For Level Spreaders Receiving Flow From a BMP
Type of BMP
Drawdown flow from the BMP cis
For Level Spreaders Receiving Flow from the Drainage Area
Drainage area
16,185.00
fiz
Impervious surface area
13,480.00
fe
Percent impervious
Rational C coefficient
83.29
0.82
°/v
CY
Peak flow from the 1 inlhr storm
0.30
cfs
O •�`
Time of concentration
Rainfall intensity,l0-yr storm
5.00 min
10.04 inthr
��G
Peak flow from the 10-yr storm
3.06
cfs
Where Does the Level Spreader Discharge?
To a grassed bioretention cell?
(Y or N)
To a mulched bioretention cell?
(Y or N)
To a wetland?
(Y or N)
To a filter strip or riparian buffer?
Y
(Y or N)
Please complete filter strip characterization below.
Other (specify)
Filter Strip or Riparian Buffer Characterization (if applicable)
Width of grass
20.00
ft
Width of dense ground cover
30.00
ft
Width of wooded vegetation
ft
Total width
50.00
It
Elevation at downslope base of level lip
9.20
fmsl
Elevation at top of bank of the receiving water
2,40
fmsl
Slope (from level lip to to top of bank)
13.60
% Level spreaders must be placed in series.
Are any draws present?
N
(Y or N) OK
Level Spreader Design
Forebay surface area
36.00
sq ft OK
Feet of level lip needed per cfs
13
ft/cfs
Answer "Y" to one of the following:
Length based on the 1 inihr storm?
(Y or N)
Length based on the 10-yr storm?
Y
(Y or N)
Length based on the BMP discharge rate?
(Y or N)
Design flow
3,08
cis
Is a bypass device provided?
N
(Y or N) A bypass device is not needed.
Length of the level lip
40.30
ft Level spreader length OK.
Are level spreaders in series?
N
.(Y or N)
Form SW401-Level Spreader, Filter Strip, Restored Riparian Buffer-Rev.5 Parts I. and ll. Design Summary, page 1 of 2

;, r 5 .
f' ,. �_, .. .. .� -1 .. �f.. _. vfif• JET � .f�, _ i � � 1 � .
r
+ti
�
'

Bypass Channel Design (if applicable)
Does the bypass discharge through a wetland?
Does the channel enter the stream at an angle?
Dimensions of the channel (see diagram below):
M
B
W
y
Peak velocity in the channel during the 10-yr storm
Channel lining material
1 1---------
(Y or N)
Do not compile ft section of the worksheet.
(Y or N)
Do not complete this section of the waksheet.
Do not complete this section of the worksheet.
ft
Do not complete this section of the worksheet.
ft
Do not oomplete this section of the workshel.
ft
Do not complete this section of the workshel.
ft
Do not complete this section of the wofksheet.
M
1 B
cis Do not canplete this section of the worksheet
Do not complele this section of the worksheel
� 1
M
Form SW401-Level Spreader, Fifter Strip, Restored Riparian Buffer-Rev.5 Paris I. and IL Design Summary, page 2 of 2

111. REQUIRED ITEMS CHECKLIST
Please indicate the page or plan sheet numbers where the supporting documentation can be found. An incomplete submittal package wilf
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.
l L Sheet 2 &3 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.
Sheets 7,849 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.
4 F� Sheet 9
Attached
f2_
Addendum
,V �G
Section 2
L�—`—�—
Attached
NA
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. A date -stamped photograph of the filter strip that clearly shows the type of vegetation that is present.
5. A construction sequence that shows how the level spreader will be protected from sediment until the entire
drainage area is stabilized.
5. The supporting calculations.
7. A copy of the signed and notarized operation and maintenance (0&M) agreement.
8. A copy of the deed restrictions (if required).
Form SW401-Level Spreader, Fitter Strip, Restored Riparian Buffer-Rev.5 Part III, page 1 of 1

401 Certification Application Form
Level Spreader Supplement
Drainage Area Two (2)
Addendum
Notes Section U
Time of concentration calculations
The time of concentration is less than 5 minutes. Standard practice when this
occurs is to use a tc = 5 min. This is the most conservative value contained in
reference material.
Filter Strip or Riparian Buffer Characterization
Width of Grass:
The width of the grass stated as 20' is approximate. Existing dense ground cover
already in place will be disturbed only to the extent required to install the level
spreader; this area will be reseeded with grass.
Slope:
The Level Spreader supplement notes state, level spreaders should be placed in
series based on the slope of 13.6 %. Compliance with regulations requiring a 50'
setback from N14W prohibits placement of additional level spreaders between the
level spreader proposed and the waters edge. However, the area immediately
down flow of the level spreader has a slope of approximately 1 %. Given the
infiltration rate of the in -situ soil in the level spreader supply channel and the
area immediately down flow of the level spreader minimal water flow is
anticipated in the lower extents of the filter strip which is well established
vegetation.
Notes Section II
Item 4 The attached photo is of the existing vegetation in the area of the filter
strips for Basin I and Basin 2. We did not have a recent photo of the
area. One can be provided via email if required.
Construction Seauence
1. Complete rough grading of parking area, infiltration basin, level spreader, and
vegetative filter.
2. Complete fine grading of parking area and access road. Stabilize with compacted
ABC stone.
3. Pave parking area and access road. This eliminates sediment available to enter
the infiltration basin.
4. While completing 3 above, construct splitter box, forebay, and level spreader.
5. Fine grade infiltration basin, level spreader supply channel, and vegetative filter.
6. Stabilize graded areas with vegetation.

Permit Number:
(to be provided by DWQ)
Drainage Area Number: Z
Filter Strip, Restored Riparian Buffer and Level Spreader
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.
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).
o
— Once a year, the filter strip will be reseeded to maintain a dense growth of
N
vegetation
C
o
co
— 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 immediately.
BMP element:
Potentialproblem;
How I will remediate the problem.
The entire filter strip
Trash/debris is present.
Remove the trash/debris.
system
The flow splitter device
The flow splitter device is
Unclog the conveyance and dispose
(if applicable)
clogged.
of anysediment off -site.
The flow splitter device is
Make any necessary repairs or
damaged.
replace if damage is too large for
repair.
Form SWU40I-Level Spreader, Filter Strip, Restored Riparian Buffer O&M-Rev.3 Page 1 of 3

BMP element:
The swale and the level
lip
The bypass channel
The filter strip
The receiving water
Potential problem:
The swale is clogged with
sediment.
The level lip is cracked,
settled, undercut, eroded or
otherwise damaged.
There is erosion around the
end of the level spreader that
shows stormwater has
bypassed it.
Trees or shrubs have begun
to grow on the Swale or just
downslope of the level lip.
Areas of bare soil and/or
erosive gullies have formed
Turf reinforcement is
damaged or ripap is rolling
downhill.
Grass is too short or too long
(if applicable).
Areas of bare soil and/or
erosive gullies have formed.
Sediment is building up on
the filter strip.
Plants are desiccated
Plants are dead, diseased or
dying.
Nuisance vegetation is
choking out desirable species.
Erosion or other signs of
damage have occurred at the
outlet.
How I will remediate the problem:
Remove the sediment and dispose
of it off -site.
Repair or replace lip.
Regrade the soil to create a berm
that is higher than the level lip, and
then plant a ground cover and
water until it is established. Provide
lime and a one-time fertilizer
application.
Remove them.
Regrade the soil if necessary to
remove the gully, and then
reestablish proper erosion control.
Study the site to see if a larger
bypass channel is needed (enlarge if
necessary). After this, reestablish
the erosion control material.
Maintain grass at a height of
approximately three to six inches.
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.
Remove the sediment and
restabilize the soil with vegetation if
necessary. Provide lime and a one-
time fertilizer application.
Provide additional irrigation and
fertilizer as needed.
Determine the source of the
problem: soils, hydrology, disease,
etc. Remedy the problem and
replace plants. Provide a one-time
fertilizer application.
Remove vegetation by hand if
possible. If pesticide is used, do not
allow it to get into the receiving
water.
Contact the NC Division of Water
Quality local Regional Office, or the
401 Oversight Unit at 919-733-1786.
Form SWU401-Level Spreader, Filter Strip, Restored Riparian Buffer O&M-Rev.3 Page 2 of 3

Permit Number: S�ZOp2 Q7Z�—
(to he provided by DWQ)
I acknowledge and agree by my signature below that I 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:Ocean Isle Beach BAA
BMP drainage area number:Two (2) (Southern, Basin 2)
Print name:Erik Christofferson
Title:Chief, Division of En ine�erin,g Services _
Address:1720 Mail Service Center
Phonc:919 707-0150 ,
Signature:
Date: ( i to Loi
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, Lan` - r; a � , ; ,t awrl-.< , a Notary Public for the State of
IV ear` hhL��Ac-e�►v(.'�.��Q County of "62n , do hereby certify that
personally appeared before me this 44� -
day of ��Jn rv.�D�,C , c;�00 , and acknowledge the due execution of the
forgoing filter strip, riparian buffer, and/or level spreader maintenance requirements.
Witness my hand and official seal,
Notary Public
Wake County
North Carolina
Commission Expires 2/26/201
SEAL
My commission expires a " 014 — CD.Di 1
Form SWU40I-Level Spreader, Filter Strip, Restored Riparian Buffer O&M-Rev,3 Page 3 of 3

.� + •r
� t; .�1 •� }}�� ..b ....ten �t� Y
:�r� y 1, '' � Y ' i ° � �;
w,f •
_'1 � � ` ��
•� , ' } c

Permit Number:��
(to be provided by DWQ)
Drainage Area Number:
Filter Strip, Restored Riparian Buffer and Level Spreader
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 yt
corrected, repaired or replaced immediately. These deficiencies can affect the integrity
of structures, safety of the public, and the removal efficiency of the BMP. �� y h
p�
Important maintenance procedures: o
Immediately after the filter strip is established, any newly planted vegeta44
tio s9
will be watered twice weekly if needed until the plants become established �O
(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 immediately.
BMP element:
Potentialproblem:
How 1 will remediate the roblem:
The entire filter strip
Trash/debris is present.
Remove the trash/debris.
system
The flow splitter device
The flow splitter device is
Unclog the conveyance and dispose
(if applicable)
clogged.
of anysediment off -site.
The flow splitter device is
Make any necessary repairs or
damaged.
replace if damage is too large for
repair.
Form SWU40l-Level Spreader, Filter Strip, Restored Riparian Buffer O&M-Rev.3 Page 1 of 3

5'�
r�
5

Permit Number:
(to be provided by DWQ)
Drainage Area Number:
Infiltration 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.
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 will 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 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 immediately.
BMP element:
Potentialproblem:
How I will remediate theproblem:
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
infiltration 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.
The inlet device: pipe or
The pipe is clogged (if
Unclog the pipe. Dispose of the
swale
applicable .
sediment off -site.
The pipe is cracked or
Replace the pipe.
otherwise damaged (if
applicable).
Erosion is occurring in the
Regrade the swale if necessary to
swale (if applicable).
smooth it over and provide erosion
control devices such as reinforced
turf matting or riprap to avoid
future problems with erosion.
Form SW401-Infiltration Basin O&M-Rev.3 Page I of 3

BMP element:
The forebay
The main treatment area
The embankment
The outlet device
The receiving water
Potential problem:
Sediment has accumulated
and reduced the depth to 75%
of the original design depth.
Erosion has occurred or
riprap is displaced.
Weeds are present.
A visible layer of sediment
has accumulated.
Water is standing more than
5 days after a storm event.
Weeds and noxious plants are
growing in the main
treatment area.
Shrubs or trees have started
to grow on the embankment.
An annual inspection by an
appropriate professional
shows that the embankment
needs repair.
Clogging has occurred.
The outlet device is damaged
Erosion or other signs of
damage have occurred at the
outlet.
How I will remediate the problem:
Search for the source of the
sediment and remedy the problem if
possible. Remove the sediment and
dispose of it in a location where it
will not cause impacts to streams or
the BMP.
Provide additional erosion
protection such as reinforced turf
matting or riprap if needed to
prevent future erosion problems.
Remove the weeds, preferably by
hand. If pesticides are used, wipe
them on the plants rather than
Search for the source of the
sediment and remedy the problem if
possible. Remove the sediment and
dispose of it in a Iocation where it
will not cause impacts to streams or
the BMP. Replace any media that
was removed in the process.
Revegetate disturbed areas
immediately.
Replace the top few inches of filter
media and see if this corrects the
standing water problem. If so,
revegetate immediately. If not,
consult an appropriate professional
for a more extensive repair.
Remove the plants by hand or by
wiping them with pesticide (do not
Remove shrubs or trees
immediately.
Make all needed repairs.
Clean out the outlet device. Dispose
of the sediment off -site.
Repair or replace the outlet device.
Contact the NC Division of Water
Quality 401 Oversight Unit at 919-
733-1786.
Form SW401-Infiltration Basin O&M-Rev.3 Page 2 of 3

Permit Number: �IiY?i 09, a -7 ( S
(t� ided by DWQ)
I acknowledge and agree by my signature below that I 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:Ocean Isle Beach BAA
BMP drainage area number:One (1) (Northern, Basin 1)
Print name:Erik Christofferson
Title:Chief, Division of En ing eering Services
Address:1720 Mail Service Center
19 707-0150
Signature:
Date:
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.
allotary Public for the State of
d c"ThAleltr�0., County of , do hereby certify that �f
%&t� ' e personally appeared before me this L L
day of pJ'tr,,� , Q, oc� J , and acknowledge the due execution of the
forgoing filter strip, riparian buffer, and/or level spreader maintenance requirements.
Witness my hand and official seal,
1 Cynthia •- Public
Edwards
North • �11 ` - - • tl
✓rrirl�.T .r ��rf�s
SISAL
My commission expires CZ - aZ 4 * a o 1 ?
Form SWU401-Level Spreader, Filter Strip, Restored Riparian Buffer O&M-Rev.3 Page 3 of 3

A j � V �a i
' � '�' i }
f Y�
�'y �
1 a S
'~ � i.
� '�

Permit No�_�/'JlSzycx
{to be provided by DWQ)
ATA
STORMWATER MANAGEMENT PERMIT APPLICATION FORM
o
NCDENR 401 CERTIFICATION APPLICATION FORM
INFILTRATION BASIN SUPPLEMENT
This form 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 Ocean Isle Beach BAA
Contact Person Daniel Cabe
Phone Number 919 218A149
Date 1-Apr-09
Drainage Area Number Two (2) - Application, (Southern Drainage Area, Basin 2 - Plan Sheets)
li. DESIGN INFORMATION
Site Characteristics
Drainage area
16,185.00 {�
Impervious area
13,480.00 ft2
Percent impervious
0.83 %
Design rainfall depth
1.50 in
Peak Flow Calculations
1-yr, 24-hr rainfall depth ,r
'lyri r intensity /Q — Yr, 6 • A' VA -
Pre -development 1-yr, 24-hr discharge
Post -development 1-yrr34 6r discharge my r�
Pre/Post 1-yr, 24-hr peak flow control
Storage Volume: Non -SA Waters
Minimum design volume required
Design volume provided
Storage Volume: SA Waters
1.5" runoff volume
Pre -development 1-yr, 24-hr runoff volume
Post -development 1-yr, 24-hr runoff volume
Minimum required volume
Volume provided
Soils Report Summary
Soil type
Infiltration rate
SHWT elevation
Basin Design Parameters
Drawdown time
Basin side slopes
Basin bottom elevation
Storage elevation
Storage Surface Area
Top elevation
Basin Bottom Dimensions
Basin length
Basin width
Bottom Surface Area
NA
in
10,04'
inlhr
NA
f131sec
3.08'
ft3lsec
#VALUE!
ft3lsec
ft3
ft3
1618" ft3
NA ft3
NA ft3
#VALUE! ft3
1818- ft3
Fine Sand
5.61 inlhr
6.90 fmsl
0.07
days OK
3.00
:1 OK
9.00
fmsl OK
9.90
fmsl
2,260.00
ft'
10.50
fmsl
irregular ft
}rregular ft
1,787.00 f12
#VALUE!
Form SW401-Infiltration Basin-Rev.4 Paris I. & II. Design Summary, Page 1 of 2

N�•
.� � . t iy, � � >

Permit No.
(to be provided by DWQ)
Additional Information
Maximum runoff to each inlet to the basin?
0.45
ac-in
OK
Length of vegetative filter for overflow
50.00
ft
OK
Distance to structure
16.00
ft
OK
Distance from surface waters
50.00
ft
OK
Distance from water supply well(s)
>100
ft
OK
Separation from impervious soil layer
NA
ft
OK
Naturally occuring soil above Owl
2.10
ft
OK
Bottom covered with 4-in of clean sand?
Y
(Y or N)
OK
Proposed drainage easement provided?
Y
(Y or N)
OK
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
Splitter Box
Form SW401-Infiltration Basin-Rev.4 Parts I. & II. Design Summary, Page 2 of 2

Permit No
(to be provided by DWQ)
Jill. 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.
Page/ Plan
Initials
Sheet No.
[�
Sheets 2 & 3
1. Plans (1" - 50' or larger) of the entire site showing:
Design at ultimate build -out,
- Off -site drainage (if applicable), ,
Get 6 y
'l _--9F Delineated drainage basins (include Rational C coefficient per basin),
sf 3
- Basin dimensions,
Pretreatment system,
- High flow bypass system,
- Maintenance access,
- Proposed drainage easement and public right of way (ROW),
- Overflow device, and
- Boundaries of drainage easement.
Sheets 7,8,&9
2. Partial plan (1" = 30' or larger) and details for the infiltration basin showing:
Bypass structure,
- Maintenance access,
- Basin bottom dimensions,
- Basin cross-section with benchmark for sediment cleanout,
Flow distribution detail for inflow,
Vegetated filter, and
Sheets 8 & 9
- Pretreatment device.
3. Section view of the infiltration basin 0 = 20' or larger) showing:
- Pretreatment and treatment areas, and
n
f e—
Inlet and outlet structures.
Ca1cs Pg 2
4. A table of elevations, areas, incremental volumes & accumulated volumes to verify the volume provided.
�l FL
Exhibit G
5. A soils report that is based upon an actual field investigation, soil borings, and infiltration tests. The
results of the soils report must be verified in the field by DWQ, by completing & submitting the soils
investigation request form. County soil maps are not an acceptable source of soils information,
�L
401 Add,
6. A construction sequence that shows how the infitlration basin will be protected from sediment until the
entire drainage area is stabilized.
The
Section 2
7. supporting calculations.
WL
0 & M Agreer
' 8. A copy of the signed and notarized operation and maintenance (0&M) agreement.
NA 9, A copy of the deed restrictions (if required).
Form SW401-Infiltration Basin-Rev.4 Page 1 of 1 Part III. Required Items Checklist, Page 1 of t

{
L ` ; ; . �
�� .
{.- � ws l- � l��

401 Certification Application Form
Infiltration :Basin Supplement
Drainage Area Two (2)
Addendum
Notes Section II
Peak Flow Calculations
* The NC Wildlife is requesting to be vested in the pre -October 1, 2009
rules; therefore, the peak flow was calculated based on the 10-Year storm
with a time of concentration of 5 minutes instead of the 1-Year, 24-hr
storm.
Storage Volume SA Waters
** Pre -October 1, 2009 rules require storage of the first 1.5 inches of rain.
Calculations were not completed for the pre and post conditions. The
minimum required volume is contained within the proposed basin.
Construction Seauence
l . Complete rough grading of parking area, infiltration basin, level spreader,
and vegetative filter.
2. Complete fine grading of parking area and access road. Stabilize with
compacted ABC stone.
3. Pave parking area and access road. This eliminates sediment available to
enter the infiltration basin.
4. While completing 3 above, construct splitter box, forebay, and level
spreader. '
5. Fine grade infiltration basin, level spreader supply channel, and vegetative
filter.
6. Stabilize graded areas with vegetation.

M
Permit Number:
(to be provided by DWQ)
Drainage Area Number: Z.
Infiltration 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 Iocation. 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.
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 will 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 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 immediately.
BMP element:
Potentialproblem:
How 1 will remediate the roblem:
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
infiltration 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.
The inlet device: pipe or
The pipe is clogged (if
Unclog the pipe. Dispose of the
swale
applicable).
sediment off -site.
The pipe is cracked or
Replace the pipe.
otherwise damaged (if
a licable).
Erosion is occurring in the
Regrade the swale if necessary to
swale (if applicable),
smooth it over and provide erosion
control devices such as reinforced
turf matting or riprap to avoid
future problems with erosion.
Form SW40I-infiltration Basin O&M-Rev.3
Page I of 3

BMP element:
Potential problerry
How I will remediate theproblem:
The forebay
Sediment has accumulated
Search for the source of the
and reduced the depth to 75%
sediment and remedy the problem if
of the original design depth.
possible. Remove the sediment and
dispose of it in a location where it
will not cause impacts to streams or
the BMP.
Erosion has occurred or
Provide additional erosion
riprap is displaced.
protection such as reinforced turf
matting or riprap if needed to
revent 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
Search for the source of the
has accumulated.
sediment and remedy the problem if
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
Replace the top few inches of filter
5 days after a storm event.
media and see if this corrects the
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
growing in the main
wiping them with pesticide {do not
treatment area.
spray)-_
The embankment
Shrubs or trees have started
Remove shrubs or trees
to grow on the embankment.
immediately.
An annual inspection by an
Make all needed repairs.
appropriate professional
shows that the embankment
needs repair.
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 NC Division of Water
damage have occurred at the
Quality 401 Oversight Unit at 919-
outlet.
733-1786.
Form SW401-Infiltration Basin O&M-Rev.3 Page 2 of 3

PermitNumber:
(to be provided by DWQ)
D / r
I acknowledge and agree by my signature below that I 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 -.Ocean Isle Beach BAA
BMP drainage area number:Two 2 SouthernBasin 2
Print name:Erik Christofferson
Title:Chief, Division of Engineering Services
Address:1720 Mail Service Center
Phone:[phone]
Signature:
Date: 1� I OA
Note: The legally responsible parry should not be a homeowners association unless more than 50% of
the lots have been sold and a resident of the subdivision has been named the president.
I, _ �t!C�+►u�. �.�Q�� , a Notary Public for the State of
County of �a., , do hereby certify'that
personally appeared before me this
day of , ao6iand acknowledge the due execution of the
forgoing infiltration basin maintenance requirements. Witness my hand and official seal,
Cynthia S. Edwards
Notary Public
Wake t :ounty
North Oarolina
Commissic,rr Expires 2/26/2011
SEAL
My commission expires a� — Q G - o?U 21
Form SW401-infiltration Basin O&M-Rev.3 Page 3 of 3

V ro, 20 �7l :
Permit No. + 5
��(t be provided by DWQ)
3 oF�ar�9
m O� QG r-
�,+ STORMWATER MANAGEMENT PERMIT APPLICATION FORM p
NCDENR 401 CERTIFICATION APPLICATION FORM
INFILTRATION BASIN SUPPLEMENT
This form must be filled 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 Ocean Isle Beach SAA
Contact Person Daniel Cabe
Phone Number 919 218-4149
Date 21-Dec-09
Drainage Area Number Three (3) - Application, (Access Drainage Area, Basin 3 -Plan Sheets)
II. DESIGN INFORMATION
Site Characteristics
Drainage area
2,297.00 ft'
Impervious area
1,417.00 it2
Percent impervious
0.62 %
Design rainfall depth
1.50 in
Peak Flow Calculations
1-yr, 24-hr rainfall depth
1-yr, 24-hr intensity
Pre-deveiopment 1-yr, 24-hr discharge
Post -development 1-yr, 24-hr discharge
PrelPost 1-yr, 24-hr peak flow control
Storage Volume: Non -SA Waters
Minimum design volume required
Design volume provided
Storage Volume: SA Waters
1.5" runoff volume
Pre -development 1-yr, 24-hr runoff volume
Post -development 1-yr, 24-hr runoff volume
Minimum required volume
Volume provided
Soils Report Summary
Soil type
Infiltration rate
SHWT elevation
Basin Design Parameters
Drawdown time
Basin side slopes
Basin bottom elevation
Storage elevation
Storage Surface Area
Top elevation
Basin Bottom Dimensions
Basin length
Basin width
Bottom Surface Area
NA in 44�
10.04* inlhr
NA ft3lsec OF
0.35* ft3lsec
#VALUE! Wisec ��'• i 2
�'0
W
ft3
174** ft3
NA ft3
NA ft3
#VALUE! ft3
195** ft'
Fine Sand
0.75 inlhr
4,50 fmsl
0.49
days OK
3,00
:i OK
6.50
fmsl OK
7,10
fmsl
386.00
ft'
7.50
fmsl
irregular ft
irregular ft
268.00 ftz
#VALUE!
Form SW401-Infiltration Basin-Rev,4 Paris 1. & II, Design Summary, Page 1 of 2

Permit No.
be provided by DWQ)
Additional Information
Maximum runoff to each inlet to the basin?
0,05
ac-in
OK
Length of vegetative filter for overflow
50,00
ft
OK
Distance to structure
>100
ft
OK
Distance from surface waters
200.00
ft
OK
Distance from water supply wells)
>100
ft
OK
Separation from impervious soil layer
NA
ft
OK
Naturally occuring soil above shwt
2.00
ft
OK
Bottom covered with 4-in of clean sand?
Y
(Y or N)
OK
Proposed drainage easement provided?
Y
(Y or N)
OK
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
Splitter Box
Form SW401-Infiltrabon Basin-Rev,4 Parts L & II. Design Summary, Page 2 of 2

Permit No. 5 "/ �Q
�(to e ded by DWQ)
1
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.
Page/ Plan
Initials Sheet No.
I Sheets 2 & 3 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 (ROW),
- Overflow device, and
Boundaries of drainage easement.
PLC_ (_ Sh. 10,11,&12 2. Partial plan (1" = 30' or larger) and details for the infiltration basin showing:
Bypass structure,
- Maintenance access,
- Basin bottom dimensions.
Basin cross-section with benchmark for sediment cleanout,
Flow distribution detail for inflow,
Vegetated filter, and
- Pretreatment device.
Sheets 11 &12
3. Section view of the infiltration basin (1" = 20' or larger) showing:
Pretreatment and treatment areas, and
Inlet and outlet structures.
1
Calcs Pg 2
4. A table of elevations, areas, incremental volumes & accumulated volumes to verify the volume provided.
Attached
5. A soils report that is based upon an actual field investigation, soil borings, and infiltration tests. The
results of the soils report must be verified in the field by DWQ, by completing & submitting the soils
investigation request form. County soil maps are not an acceptable source of soils information.
401 Add.
6. A construction sequence that shows how the infitlration basin will be protected from sediment until the
entire drainage area is stabilized.
dr7 f G
Section 3
7. The supporting calculations.
P :F L Prev Submittec 8. A copy of the signed and notarized operation and maintenance (O&M) agreement.
NA 9. A copy of the deed restrictions (if required).
Form 5W401-Infiltration Basin-Rev.4 Page 1 of 1 Part III. Required Items Checklist, Page 1 of 1

401 Certification Application Form
Infiltration Basin Supplement
Drainage Area Three (3)
Addendum
Notes Section EI
Peak Flow Calculations
* The NC Wildlife is requesting to be vested in the pre -October 1, 2008
rules; therefore, the peak flow was calculated based on the 10-Year storm
with a time of concentration of 5 minutes instead of the 1-Year, 24-hr
storm.
Storage Volume SA Waters
** Pre -October 1, 2009 rules require storage of the first 1.5 inches of rain.
Calculations were not completed for the Pre and post conditions. The
minimum required volume is contained within the proposed basin.
Construction Seauence
1. Complete rough grading of parking area, infiltration basin, level spreader,
and vegetative filter.
2. Complete fine grading of parking area and access road. Stabilize with
compacted ABC stone.
3. Pave parking area and access road. This eliminates sediment available to
enter the infiltration basin.
4. While completing 3 above, construct splitter box, forebay, and level
spreader.
5. Fine grade infiltration basin, level spreader supply channel, and vegetative
filter.
b. Stabilize graded areas with vegetation.

Permit Number: ��l�� 7/5'
(to be provided by DWQ)
Drainage Area Number: 3
Infiltration 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.
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 will 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 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 immediately.
BMP element:
Potentialproblem:
How 1 will remediate the problerm
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
infiltration 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.
The inlet device: pipe or
The pipe is clogged (if
Unclog the pipe. Dispose of the
swale
applicable).
sediment off -site.
The pipe is cracked or
Replace the pipe.
otherwise damaged (if
applicable).
Erosion is occurring in the
Regrade the swale if necessary to
swale (if applicable).
smooth it over and provide erosion
control devices such as reinforced
turf matting or riprap to avoid
future problems with erosion.
Form SW401-Infiltration Basin O&M-Rev.3 Page 1 of 3

BMP element:
Potential roblem:
How I will remediate theproblem:
The forebay
Sediment has accumulated
Search for the source of the
and reduced the depth to 75%
sediment and remedy the problem if
of the original design depth.
possible. Remove the sediment and
dispose of it in a location where it
will not cause impacts to streams or
the BMP.
Erosion has occurred or
Provide additional erosion
riprap is displaced.
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 pesticides are used, wipe
them on the plants rather than
spraying.
The main treatment area
A visible layer of sediment
Search for the source of the
has accumulated.
sediment and remedy the problem if
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
Replace the top few inches of filter
5 days after a storm event.
media and see if this corrects the
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
growing in the main
wiping them with pesticide (do not
treatment area.
spray).
The embankment
Shrubs or trees have started
Remove shrubs or trees
to grow on the embankment.
immediately.
An annual inspection by an
Make all needed repairs.
appropriate professional
shows that the embankment
needs repair.
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 NC Division of Water
damage have occurred at the
Quality 401 Oversight Unit at 919-
outlet.
733-1786,
Form SW401-Infiltration Basin O&M-Rev.3 Page 2 of 3

Permit Number: (5 1' 0 O 220 -7(s'
(to / e provided by DWQ) r�
3
I acknowledge and agree by my signature below that I 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:Ocean Isle Beach BAA
BMP drainage area number:Three (3) (Access, Basin 3)
Print name:Erik Christofferson
Title:Chief. Division of Engineering Services
Address:1720 Mail Service Center
Phone:[phone]
Signature:
Date:
q'�_
Note: The legally responsible party should not be a homeowners association unless -more than 50% of
the lots have been sold and a resident of the subdivision has been named the president.
I, W A.r4S , a Notary Public for the State of
Kb-f- .,, C•ounty of kkg� , do hereby certify that
oG�ci�1d�c~�Or" personally appeared before me this cQ
day of , gPj)�!,J , and acknowledge the due execution of the
forgoing infiltration basin maintenance requirements. Witness my hand and official seal,
Cynthia S. Edwards
Notary Public
Wake County
North Carolina
Commissrer Expires 2/26/2011
SEAL
My commission expires o?' oZ 41 - oi/D I 1
Form SW401-Infiltration Basin O&M-Rev.3 Page 3 of 3

� J . . . i '.
WA
1

NCDENR
STORMWATER MANAGEMENT PERMIT APPLICATION FORM
401 CERTIFICATION APPLICATION FORM
LEVEL SPREADER, FILTER STRIP AND RESTORED RIPARIAN BUFFER SUPPLEMENT
This form must be completely filled out, printed and submitted.
DO NOT FORGET TO ATTACH THE REQUIRED ITEMS CHECKLIST AND ALL REQUIRED ITEMS (NEXT WORKSHEET)I
I. PROJECT INFORMATION
Project name Ocen Isle Beach BAA
Contact name Daniel Cabe
Phone number 919 218-4149
Date December 18, 2009
Drainage area number Three(3) - Application, (Access Drainage Area, Basin 3 - Plan Sheets)
11. DESIGN INFORMATION
For Level Spreaders Receiving Flow From a BMP
Type of BMP
Drawdown flow from the BMP cfs
For Level Spreaders Receiving Flow from the Drainage Area
Drainage area
2,297.00
ft2
Impervious surface area
1,417.00
ft'
Percent impervious
61,69
Rational C coefficient
0.66:
Peak flow from the 1 in/hr storm
0.03
cfs
��C -
Time of concentration
Rainfall intensity, 10-yr
5.00 min
inlhr
,��
storm
Peak flow from the 10-yr
10,04
0.35
20
storm
cfs
Where Does the Level Spreader Discharge 7
To a grassed bioretention cell?
(Y or N)
To a mulched bioretention cell?
(Y or N)
To a wetland?
(Y or N)
To a filter strip or riparian buffer?
Y
(Y or N)
Please complete filter strip characterization below.
Other (specify)
Filter Strip or Riparian Buffer Characterization (if applicable)
Width of grass
50.00
ft
Width of dense ground cover
000
ft
Width of wooded vegetation
ft
Total width
50.00
ft
Elevation at downslope base of level lip
6.10
fmsl
Elevation at top of bank of the receiving water
5,50
fmsi
Slope (from level lip to to top of bank)
1.20
% OK
Are any draws present?
N
(Y or N) OK
Level Spreader Design
Forebay surface area
9.00
sq ft OK
Feet of level lip needed per cfs
13
fucfs
Answer "Y" to one of the following:
Length based on the 1 in/hr storm?
(Y or N)
Length based on the 10-yr storm?
Y
(Y or N)
Length based on the BMP discharge rate?
(Y or N)
Design flow
0.35
cfs
Is a bypass device provided?
N
(Y or N) A bypass device is not needed.
Form SW461-Level Spreader, Filter Strip, Restored Riparian Buffer-Rev.5 Parts I. and H. Design Summary, page 1 of 2

Length of the level lip
Are level spreaders in series? '
13.00 ft Level spreader length OK.
N (Y or N)
Bypass Channel Design (if applicable)
Does the bypass discharge through a wetland?
Does the channel enter the stream at an angle?
Dimensions of the channel (see diagram below):
M
B
W
y
Peak velocity in the channel during the 10-yr storm
Channel lining material
M
(Y or N)
Do not complete this section of the worksheet.
(Y or N)
Do not complete this section of the worksheet.
Do not complete this section of the worksheet.
ft
Do not complete this section of the worksheet.
ft
Do not complete this section of the worksheet.
ft
Do not complete this section of the worksheet.,
ft
Do not complete this section of the worksheet.
cfs
Do not complete this section of the worksheet.
Do not complete this section of the worksheet.
M
Form SW401-Level Spreader, Filter Strip, Restored Riparian Buffer-Rev.5 Parts I. and ll. Design Summary, page 2 of 2

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
Initials Sheet No.
jI f !i Sheet 2 &3 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.
L Shts.1Q11,&1', 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.
P � L Sheet 12
ALL_ Attached
pf L, Addendum
Section 3
ti rev. Submittec
NA
3. Section view of the level spreader (V = 20' or larger) showing:
- Underdrain system (if applicable),
- Level lip,
- Upslope channel, and
- Downslope filter fabric,
4. A date -stamped photograph of the filter strip that clearly shows the type of vegetation that is present.
5. A construction sequence that shows how the level spreader will be protected from sediment until the entire
drainage area is stabilized.
6, The supporting calculations.
7. A copy of the signed and notarized operation and maintenance (0&M) agreement.
8. A copy of the deed restrictions (if required).
Form SW401-Level Spreader, Filter Strip, Restored Riparian Buffer-Rev.5 Part III, page 1 of 1

401. Certification Application Form
Level Spreader Supplement
Drainage Area Three (3)
Addendum
Notes Section II
Time of concentration calculations
The time of concentration is less than 5 minutes. Standard practice when
this occurs is to use a to = 5 min. This is the most conservative value
contained in reference material.
Notes Section III
Item 2 Spot elevations instead of contour lines are provided on Sheet l 1
Construction Sequence
1. Complete rough grading of parking area, infiltration basin, level spreader,
and vegetative filter.
2. Complete fine grading of parking area and access road. Stabilize with
compacted ABC stone.
3. Pave parking area and access road. This eliminates sediment available to
enter the infiltration basin.
4. While completing 3 above, construct splitter box, forebay, and level
spreader.
S. Fine grade infiltration basin, level spreader supply channel, and vegetative
171 lter.
6. Stabilize graded areas with vegetation.

Permit Number:�� S,,aD
(to be provided by DIVQ)
Drainage Area Number:
Filter Strip, Restored Riparian Buffer and Level Spreader
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.
Important maintenance procedures:
O
— Immediately after the filter strip is established, any newly planted vegetation �
will be watered twice weekly if needed until the plants become established a
(commonly six weeks). `0
— Once a year, the filter strip will be reseeded to maintain a dense growth of o
vegetation `O
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 tluck 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 immediately.
BMP element:
Potentialproblem:
How I will remediate theproblem:
The entire filter strip
Trash/debris is present.
Remove the trash/debris.
system
The flow splitter device
The flow splitter device is
Unclog the conveyance and dispose
(if applicable)
clogged.
of anysediment off -site.
The flow splitter device is
Make any necessary repairs or
damaged.'
replace if damage is too large for
repair.
Form SWU40I-Level Spreader, Filter Strip, Restored Riparian Buffer O&M-Rev.3 rage I of 3

BMP element:
The Swale and the level
lip
The bypass channel
The filter strip
The receiving water
Potential problem:
The Swale is clogged with
sediment.
The level lip is cracked,
settled, undercut, eroded or
otherwise damaged.
There is erosion around the
end of the level spreader that
shows stormwater has
bypassed it.
Trees or shrubs have begun
to grow on the swale or just
downslope of the level lip.
Areas of bare soil and/or
erosive gullies have formed
Turf reinforcement is
damaged or ripap is rolling
downhill.
Grass is too short or too long
(if applicable). _
Areas of bare soil and/or
erosive gullies have formed.
Sediment is building up on
the filter strip.
Plants are desiccated.
Plants are dead, diseased or
dying.
Nuisance vegetation is
choking out desirable species.
Erosion or other signs of
damage have occurred at the
outlet.
How I will remediate the problem:
Remove the sediment and dispose
of it off -site.
Repair or replace lip.
Regrade the soil to create a berm
that is higher than the level lip, and
then plant a ground cover and
water until it is established. Provide
lime and a one-time fertilizer
application.
Remove them.
Regrade the soil if necessary to
remove the gully, and then
reestablish proper erosion control.
Study the site to see if a larger
bypass channel is needed (enlarge if
necessary). After this, reestablish
the erosion control material.
Maintain grass at a height of
approximately three to six inches.
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.
Remove the sediment and
restabilize the soil with vegetation if
necessary. Provide lime and a one-
time fertilizer application.
Provide additional irrigation and
fertilizer as needed.
Determine the source of the
problem: soils, hydrology, disease,
etc. Remedy the problem and
replace plants. Provide a one-time
fertilizer application.
Remove vegetation by hand if
possible. If pesticide is used, do not
allow it to get into the receiving
water.
Contact the NC Division of Water
Quality local Regional Office, or the
401 Oversight Unit at 919-733-1786.
Form SWU40I-Level Spreader, Filter Strip, Restored Riparian Buffer O&M-Rev.3 Page 2 of 3

Permit Number: ��►� �� �/�
(to be provided by DWQ)
4 ,' 3
I acknowledge and agree by my signature below that I 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:Ocean Isle Beach BAA
BMP drainage area number:Three (3) (Access, Basin 3)
Print name:Erik Christofferson
Title:Chief, Division of Engineering Services
Address:1720 Mail Service Center
Phone
Signat
Note: The legally responsible party should not be a homeowners association unless more than 50% of
the lots have been sold and a resident of the subdivision has been named the president.
I, U o. Q W oXI5 , a Notary Public for the State of
County of q,O,. , do hereby certify that
o personally appeared before me this L
day of 96 \/a,yY,6cr , o.oJ, and acknowledge the due execution of the
forgoing filter strip, riparian buffer, and/or level spreader maintenance requirements.
Witness my hand and official sea],
Cynthia S. Edwards
Notary Public
Wake County
North Carolina
Commission Expires 2/26/2011
SEAL
My commission expires (=�. - of 4 — a 0 11
Form SWU40i-Level Spreader, Filter Strip, Restored Riparian Buffer O&M-Rev.3 Page 3 of 3

.�
r

Ocean Isle Beach Boat Access Ramp
StorniNvater Permit No. SW8 020715
Brunswick County
Designer's Certification
State Storr.
y
►ter Management Systems
Permit No. SW8 020715
I, Daniel E . Dawson , as a duly registered Professional Engineer
in the State of North Carolina, having been authorized to observe (periodically/ }
the construction of the project,
Ocean Isle Beach Boat Access Ramp
(Pro j ect)
the NC Wildlife Resources Commission
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 specification:
Owner must continue to monitor and repair permanent grass.
,NN.. qt. 0
1D357 2 e
Signature
Registration Number 10357 E►�Pa
'��►++Hrn 1l1►N,
Date October, 29, 2009
gro�
OCZ g � �009
7

State. Ston: iter Management Systems
Permit No. SW8 020715
Certification Requirements:
l . 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.
o� 3.' All the built -upon area associated with the project is graded such that the runoff
drains to the system.
4. The outletlbypass structure elevations are per the approved plan.
5.
The outlet structure is located per the approved plans.
Gem-
6.
Trash rack is provided on the outlet/bypass structure.
oe),Q 7.
All slopes are grassed with permanent vegetation.
8.
Vegetated slopes are no steeper than 3:1.
of 9.
The inlets are located per the approved plans and do not cause short-circuiting of
the system.
OW10.
The pennitted amounts of surface area and/or volume have been provided.
4:P�l 1.
Required drawdown devices are correctly sized per the approved plans.
ohk 12.
All required design depths are provided.
�3.
All required parts of the system are provided, such as a vegetated shelf, and a
forebay.
14. The overall dimensions of the system, as shown on the approved plans, are
provided.
cc: NCDENR-DWQ Regional Office
Ocean Isle Beach Building, Inspections