SW7081103_CURRENT PERMIT_20090424

STORMWATER DIVISION CODING SHEET
POST -CONSTRUCTION PERMITS
PERMIT NO.
SW Z�S//o3
DOC TYPE
CURRENT PERMIT
APPROVED PLANS
❑ HISTORICAL FILE
❑ COMPLIANCE EVALUATION INSPECTION
DOC DATE
YYYYMM D D

v kJu-�0
NC®ENR
North Carolina Department of Environment and Natural Resources
Beverly Eaves Perdue
Governor
Mr. David Griffin, Director
NCDENR, Division of NC Aquariums
3125 Poplarwood Court, Suite 160
Raleigh, NC 27604
Dear Mr. Griffin:
Division of Water Quality
Coleen H. Sullins
Director
April 24, 2009
Dee Freeman
Secretary
Subject: Stormwater Permit No. SW7081103
The North Carolina Aquarium Pier at Nags Head
High Density Redevelopment Project
Dare County
The Washington Regional Office received a complete Stormwater Management Permit Application for
the redevelopment of the site known as The North Carolina Aquarium Pier at Nags Head on February
18, 2009. Staff review of the plans and specifications has determined that the project, as proposed,
will comply with the Stormwater Regulations set forth in Session Law 2008-211 and Title 15A NCAC
2H.1000. We are forwarding Permit No. SW7081103 dated April 24, 2009, for the construction of the
subject project.
I �Z-13C//Z/
This permit shall be effective from the date of issuance until April 24, 2019, 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, 6714 Mail
Service Center, Raleigh, NC 27699-6714. 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 Scott
Vinson, or me at [phone].
Regional Serp-ervistir
Surface Water Protection Section
AH/sv: S:\WQS\STORMWATER\PERMIT\SW7081103
cc: Andy Deel, PE — Quible & Associates
Dare County Building Inspections
Division of Coastal Management
,/4/ashington Regional Office
Central Files
North Carolina Division of Water Quality Internet: w .nmaterquality,org One
943 Washington Square Mall Phone: [phone] FAX: [phone] NorthCarolina
Washington, NC 27889 FAX: [phone] , A 7i7fz1rv71hj
An Emml Onnarlunily 1 Affirmative Action Emolover

State Stormwater Management Systems
Permit No. SW7081103
STATE OF NORTH CAROLINA
DEPARTMENT OF ENVIRONMENT AND NATURAL RESOURCES
DIVISION OF WATER QUALITY
STATE STORMWATER MANAGEMENT PERMIT
HIGH DENSITY DEVELOPMENT
In accordance with the provisions of Article 21 of Chapter 143, General Statutes of North
Carolina as amended, and other applicable Laws, Rules, and Regulations
PERMISSION IS HEREBY GRANTED TO
NCDENR, Division of North Carolina Aquariums
The North Carolina Aquarium Pier at Nags Head
7223 S. Virginia Dare Trail, Nags Head, Dare County
FOR THE
construction, operation and maintenance of permeable pavement, underground infiltration
trenches and an infiltration basin in compliance with the provisions of Session Law 2008-211 and
15A NCAC 2H .1000 (hereafter referred to as the "stormwater rules') and the approved
stormwater management plans and specifications and other supporting data as attached and on
file with and approved by the Division of Water Quality and considered a part of this permit.
This permit shall be effective from the date of issuance until April 24, 2019, and shall be subject
to the following specified conditions and limitations:
I. DESIGN STANDARDS
This permit is effective only with respect to the nature and volume of stormwater
described in the application and other supporting data.
This stormwater system has been approved for the management of stormwater runoff as
described in Section 1.7 and 1.8 on page 3 of this permit. The stormwater controls have
been designed to handle the runoff from 94,641 square feet of impervious area.
3. The tract will be limited to the amount of built -upon area indicated in Section 1.7 and 1.8 on
page 3 of this permit, application and per approved plans. The built -upon area for the
entire development is limited to 122,198 square feet. This includes the new pier house,
but does not account for the permeable pavement credits given in the control systems'
designs.
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.
5. The runoff from all built -upon area within the permitted drainage areas of this project must
be directed into the permitted stormwater control systems.
6. The built -upon areas associated with this project shall be located at least 50 feet
landward of all surface waters.
Page 2 of 8

crate mormwater Management Systems
Permit No. SV 7081103
7
The following design criteria have been provided in the infiltration trenches and must be
maintained at design condition:
Drainage Area, ftz:
Total Impervious Surfaces, ftz:
Design Storm, inches:
Trench Length ft:
Trench Width, ft:
Trench Height, ft:
Perforated Pipe Diameter / Length
Bottom Elevation, FMSL:
Bypass Weir Elevation, FMSY
Permitted Storage Volume, ft :
Predevelopment 1 year 24 hour:
Post development 1 year 4 hour:
Type of Soil:
Expected Infiltration Rate, in/hr:
Seasonal High Water Table, FMSL:
Time to Draw Down, days:
Receiving Stream/River Basin:
Stream Index Number:
Classification of Water Body:
106,905 (DA1 & DA2)
91,702 (81,604 w/30%PermPavCredit)
1.50
73 (typical for StormTech SC310 Chamber)
39.50 (650 "SC310" Chambers required)
2.33
n/a (Storm Tech SC310 Chamber Syst
6.00
8.33
29,171
21,224
27,034
Beaches/Dunes & Newhan Urb
Comples, BnD & NuC
20.00
3.00
0.06
Roanoke Sound / Pasquotank
30-21
"SA; HQW"
The following design criteria have been permitted for the infiltration basin under the
alternative design criteria and must be provided and maintained at design condition:
C.
d.
e.
f.
9
h.
11
Drainage Area, acres:
Total Impervious Surfaces, ftz:
Design Storm, inches:
Basin Depth, feet:
Bottom Elevation, FMSL:
Bottom Surface Area, ft :
Bypass Weir Elevation, FMSL:
Permitted Storage Volume, ft :
Predevelopment 1 year 24 hour:
Post -development 1 year 24 hour:
Type of Soil:
Expected Infiltration Rate, in/hr:
Seasonal High Water Table, FMSL:
Time to Draw Down, days:
Receiving Stream/River Basin:
Stream Index Number:
Classification of Water Body:
II. SCHEDULE OF COMPLIANCE
e
m)
an
22,096 (DA4)
14,540 (13,037 w/30%Perm PavCredit)
1.50
1.50
3.00
755
4.50
1,517
3,913
4,721
Newhan Urban Complex & Corolla
Fine Sands — NuC & CoB
20.00
2.00
0.04
Roanoke Sound / Pasquotank
30-21
"SA; HQW"
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. The
permittee shall submit final site layout and grading plans for any permitted future areas
shown on the approved plans, prior to construction.
During construction, erosion shall be kept to a minimum and any eroded areas of the
system will be repaired immediately.
Page 3 of 8

State Stormwater Management Systems
Permit No. SW7081103
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, filter media, flow spreader,
catch basins, piping and vegetated filter.
g. A clear access path to the bypass structure must be available at all times.
4. Records of maintenance activities must be kept for each permitted BMP. The records will
indicate the date, activity, name of person performing the work and what actions were
taken.
5. The permittee shall submit to the Division of Water Quality an annual summary report of
the maintenance and inspection records for each BMP. The report shall summarize the
inspection dates, results of the inspections, and the maintenance work performed at each
inspection.
6. 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.
Upon completion of construction, prior to issuance of a Certificate of Occupancy, and
prior to operation of this permitted facility, a certification must be received from an
appropriate designer for the system installed certifying that the permitted facility has been
installed in accordance with this permit, the approved plans and specifications, and other
supporting documentation. Any deviations from the approved plans and specifications
must be noted on the Certification. A modification may be required for those deviations.
8. If the stormwater system was used as an Erosion Control device, it must be restored to
design condition prior to operation as a stormwater treatment device, and prior to
occupancy of the facility.
9. Access to the stormwater facilities shall be maintained via appropriate easements at all
times.
10. 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 subdivision, acquisition, lease or sale of 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.
11. A copy of the approved plans and specifications shall be maintained on file by the
Permittee at all times.
Page 4 of 8

State Stormwater Management Systems
Permit No, SV 7081103
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.
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.
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 issued shall continue in force and effect until revoked or terminated. The
permit may be modified, revoked and reissued or terminated for cause. The filing of a
request for a permit modification, revocation and reissuance 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 issuance of this permit does not prohibit the Director from reopening and modifying
the permit, revoking and reissuing the permit, or terminating the permit as allowed by the
laws, rules and regulations contained in Session Law 2008-211, Title 15A NCAC
2H.1000, and NCGS 143-215.1 et.al.
11. The permittee shall notify the Division in writing of any name, ownership or mailing
address changes at least 30 days.
Page 5 of 8

State Stormwater Management Systems
Permit No. SV 7081103
12. This permit shall be effective from the date of issuance until April 24, 2019. Application
for permit renewal shall be submitted 180 days prior to the expiration date of this permit
and must be accompanied by the processing fee.
Permit issued this the 24`h day of April, 2009.
N RTH CARO1\\LINA ENVIRONMENTAL MANAGEMENT COMMISSION
I _` V
�. o�Cyl— for
Coleen H. Sullins, Director
Division of Water Quality
By Authority of the Environmental Management Commission
Permit No. SV 7081103
Page 6 of 8

State Stormwater Management Systems
Permit No. SW7081103
The North Carolina Aquarium Pier at Nags Head
Stormwater Permit No. SW7081103
Dare 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 7 of 8

State Stormwater Management Systems
Permit No. SW7081103
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 bypass structure elevations are per the approved plan.
6. The 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-circuiting 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.
cc: NCDENR-DWQ Regional Office
Dare County Building Inspections
Page 8 of 8

DWQ USE ONLY
Date Received
Fee Paid
Permit Number
State of North Carolina n
Department of Environment and Natural Resources �,f �K O,
Division of Water Quality FEB 18 2009 C5c
STORMWATER MANAGEMENT PERMIT APPLICATION-' s
This form may be photocopied for use as an original
1. GENERAL INFORMATION
1. Applicants name (specify the name of the corporation, individual, etc. who owns the project):
North Carolina Department of Environment & Natural Resources Division of North Carolina Aquariums
2. Print Owner/Signing Official's name and title (person legally responsible for facility and compliance):
Mr. David Griffin North Carolina Aquariums Director
3. Mailing Address for person listed in item 2 above:
3125 Poplarwood Court, Suite 160
City:Raleigh State:NC Zip:27604
Phone: (800 ) 832-3474 Fax: ( )
Email: [e-mail]
4. Project Name (subdivision, facility, or establishment name - should be consistent with project name on plans,
specifications, letters, operation and maintenance agreements, etc.):
The North Carolina Aquarium Pier at Nags Head
5. Location of Project (street address):
7223 S. Virginia Dare Trail
City:Nags Head County:Dare Zip:27959
6. Directions to project (from nearest major intersection):
Project is located on the east side of Virginia Dare Trail (NC 12) at the intersection of Virginia Dare Trail and
S. Old Oregon Inlet Drive Whalebone Junction).
7. Latitude:350 54' 35" N Longitude:75° 35' 47" W of project
8. Contact person who can answer questions about the project:
Name:David A. Dee] P.E. Telephone Number: (252 ) 261-3300
Email:[e-mail]
11. PERMIT INFORMATION:
I. Specify whether project is (check one): ®New EIRenewal DModification
Form SWU-101 Version 09.25.08 Page I of

-.2. If this application is being submitted as the result of a renewal or modification to an existing permit, list the
existing permit number and its issue date (if known)
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):
®LAMA Major ®Sedimentation/Erosion Control ❑404/401 Permit ❑NPDES Industrial Stormwater
III. PROJECT INFORMATION
1. In the space provided below, summarize how stormwater will be treated. Also attach a detailed narrative
((me to two pages) describing stormwater management for the project.
Stormwater is collected via site grading, curb and gutter, and storm sewer and directed to an underground
infiltration trench or an infiltration basin for treatment and disposal
2. Stormwater runoff from this project drains to the Pasquotank River basin.
3. Total Property Area: 4.99 acres
4. Total Coastal Wetlands Area: n/a acres
5. Total Property Area (3) - Total Coastal Wetlands Area (4) = Total Project Area**:4.99 acres
6. (Total Impervious Area / Total Project Area) X 100 = Project Built Upon Area (BUA): ." ¢7, 2-
7. How many drainage areas does the project have?3 Doe3 nok adv- Bier ilo"nee
8. Complete the following information for each drainage area. If there are more than two drainagelar as ' he Pwj&l­
project, attach an additional sheet with the information for each area provided in the same format as below. A"a
For high density oroiects. rmmplete rho Ohio . j, " --- a_ :____ _-
mafion "' -
- u=a ,a a urea
tor each en meerecl stormwater devic
Area�2
Stream Namess
& Index No.age
WAArea
Area (soinage
Area (soainage
Area (so
Existing Impervious* Area (so
Proposed Impervious*Area (so
% Impervious* Area (total)
Impervious Surface Area1
.Drama'
`
' ; Drainage Area 2
On -site Buildings (sf)
On -site Streets (so
On -site Parking (so
On -site Sidewalks (so
-L
Other on -site (so
c
Off -site (so
Total (so:
*
• r�• ­-, .' �. " ueJ""u as rae nuur 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 from use when calculating the built upon area
percentage calculation. This is the area used to calculate overall percent project built upon area (BUA).
Form SWU-101 Version 09.25.08 Page 2 of 4

°. How was the off -site impervious area listed above derived?AutoCAD Area Routine
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 lot. 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 htto:/12o.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 lot.
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 httl2:1/h2o.enr.state.nc.us/su/bml2 forms htm.
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
Form SWU-101 Version 09.25.08 Page 3 of

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 at http://h2o.enr.stale.nc.us/su/msi maps.htm)
Please indicate that you have provided the following required information by initialing in the space provided
next to each item.
Is
• 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)
-
• Original of the applicable Supplement Form(s) and O&M agreement(s) for each BMP
• Permit application processing fee of $505 (Express: $4,000 for HD, $2,000 for LD)
payable to NCDENR
• 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)
VII. 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):Mr. David Griffin, North Carolina Aquariums Director
Mailing Address:3125 Poplarwood Court, Suite 160
City:Raleigh State:NC Zip:27604
Phone: (800 ) 832-3474 Fax: { )
Email: [e-mail]
VIIL APPLICANT'S CERTIFICATION
1, (print or type name of person listed in General Information, item 2) David Griffin
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 re¢or4ied, and that the proposed project complies with the requirements of 15A
NCAC 2H .1g801
Date: 101z'P10 EX
Form SWU-101 Version 09.25.08 Pale 4 of

Basin Information
East Drainage Area (DA I & DA2)
West Drainage Area (DA4)
Uncontrolled
(DA3&Other)
Pier House**
Rec. Stream Name
Roanoke Sound
Roanoke Sound
Roanoke Sound
Bear I9 ` Q-i
Rec. Stream Class & Index
SA;HQW / 30-21
SA;HQW / 30-21
SA;HQW / 30-21
SArii17VV ' 39 4I
Drainage Area (sf)
106,905 sf (2.45 Ac)
22,096 sf (0.51 Ac)
88,445 sf (2.03 Ac)
9,830 sf (0.23 Ac)
On -Site Drainage Area (sf)
106,905 sf (2.45 Ac)
22,096 sf (0.51 Ac)
88,445 sf (2.03 Ac)
0 sf**
Off -site Drainage Area (st)
0 sf
0 sf
0 sf
0 sf
Ex. Imperv. Area* (st)
62,148 sf (1.43 Ac.)
10,433 sf (0.24 Ac.)
26.748 sf (0.61 Ac)
9.830 sf (0.23 Ac)
Prop. Imper. Area (sf)
81,604 sf (1.87 Ac)
13,037 sf (0.30 Ac)
7,937 sf (0.18 Ac)
8.019 sf (0.18 Ac)
% Imperv. Area
76.3%
59.0%
9.0%
81.6%
Impervious Area
East Drainage Area (DA1 &
DA2)
West Drainage Area (DA4)
Uncontrolled
(DA3&Other)
Pier House**
On -Site Buildings
5,617 sf (0.13 Ac)
1,939 sf (0.04 Ac)
N/A
8.019 sf
On Site Streets
N/A
N/A
N/A
N/A
On -Site
Asphalt/Conc./Gravel
52,425 sf (1.20 Ac)
7,592 sf (0.17 Ac)
7,937 sf (0.18 Ac)
N/A
On -Site Turfstone
23,562 sf (0.54 Ac.)
3,506 sf (0.08 Ac.)
N/A
N/A
Other On -Site
N/A
N/A
N/A
N/A
Off -Site
N/A
N/A
N/A
Total: 81,604 sf (1.87 Ac)
Total: 13,037 sf (0.30 Ac)
Total: 7,937 sf (0.18 Ac)
Total: 8,019 sf (0.18 Ac)
* All Ex. Impervious Area to be removed. See Narrative for Existing Impervious Tabulation.
** Pier house area is outside of the "Project Area" since the pier house is located east of the CAMA line. See Narrative for discussion
(Revised 2/13/08)

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Permit No. S(A� 8//03
(to be provided by DWQ)
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NCDENR STORMWATER MANAGEMENT PERMIT APPLICATION FORM o�
401 CERTIFICATION APPLICATION FORM
INFILTRATION TRENCH SUPPLEMENT
This form must be filled out, printed and submitted.
The Required Items Checklist (Part III) must be printed, filled out and submitted along with all of the required information.
111P,9 0'J ECTiI N FOR MAT10N
Project name
The North Carolina Aquarium Pier at Nags Head
Contact person
David A. Deal, P.E.
Phone number
[phone]
Date
10/29/2008
Drainage area number
East Parcel (DA 1 & DA 2)
Site Characteristics
Drainage area
Impervious area
106,905.00
91,702.00
If
81 boq
Lgl% A, P^ OIXAA)
Percent impervious
85.8%
ft2
% V
RECEIVED
Design rainfall depth
n/a
in
Peak Flow Calculations
NOV — 5 2008
1-yr, 24-hr runoff depth
n/a
in
1-yr, 24-hr intensity
n/a
in/hr
Q [�
Pre -development 1-yr, 24-hr peak flow
n/a
f13/sec
D tl'1p/ Q-W �` `O
Post -development 1-yr, 24-hr peak flow
n/a
ft3/sec
Pre/Post 1-yr, 24-hr peak flow control
#VALUE!
ft3/sec
Storage Volume: Non -SA Waters
Minimum volume required
If
Volume provided
rya
Storage Volume: SA Waters
1.5'runoff volume
12033.00
rya
Pre -development 1-yr, 24-hr runoff volume
21,224.00
If
Post -development 1-yr, 24-hr runoff volume
27,034.00
Its
Minimum volume required
Volume provided
12033.00
20,.150'017
If
rya
OK �o/ / j'c� c� n7j o 2fry = 29v hlc�
Soils Report Summary
�9 /71
sbC^ „
Soil type
sand
"" v
Infiltration rate
20.00
in/hr
SHWT elevation
3A0
fmsl
Trench Design Parameters
Drawdown time
0.06 days OK
Perforated pipe diameter
chamber system in
Perforated pipe length
n/a If
Number of laterals
n/a
Stone type (if used)
#57
Stone void ratio
0A
Stone is free of fines?
Y (Y or N) OK
Form SW401-Infiltration Trench-Rev.3 Parts I. & ll. Design Summary, Page 1 of 2

Permit
(to be provided by OWO)
Trench Elevations
Bottom elevation
6.00 fmsl
Storage/overflow elevation
8.33 fmsl
Top elevation
9.70 fmsl
Trench Dimensions
Length (long dimension)
73.00 ft
Width (shon dimension)
39.50 ft
Height (depth)
2.33 ft
Additional Information
Maximum volume to each inlet into the trench?
0.20
ac-in
Length of vegetative filter for overflow
n/a
ft
Number of observation wells
n/a
Distance to structure
98.00
ft
Distance from surface waters
305.00
ft
Distance from water supply well(s)
n/a
ft
Separation from impervious soil layer
n/a
ft
Depth of naturally occuring soil above SHWT
3.00
ft
Bottom covered with 4-in of clean sand?
N
(Y or N)
Proposed drainage easement provided?
n/a
(Y or N)
Capures all runoff at ultimate build -out?
Y
(Y or N)
Bypass provided for larger storms?
Y
(Y or N)
Trench wrapped with geotextile fabric?
Y
(Y or N)
Pretreatment device provided
Y
OK
5613
OK
OK
OK
OK
OK
OK
OK
OK
OK
OK
OK
OK
OK
Form SW401-Infiltration Trench-Rev.3 Parts I. & II. Design Summary, Page 2 of 2

Permit
(to be provided by DWO)
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
t' s Sheet No.
iza 63 C 00 1. Plans (I - 50' or larger) of the entire site showing:
- Design at ultimate build -out,
N/A - - Off -site drainage (if applicable), - N /A
App. C of Nam Delineated drainage basins (include Rational C coefficient per basin), - A
- Trench dimensions,
Sure+ c)o y - Pretreatment system,
ghrc F clo -z - High flow bypass system,
Maintenance access,
N/A - Proposed drainage easement and public right of way (ROW),
Overflow device, and
NIA - Boundaries of drainage easement.
DAD_ _'*eA6 C3. C10 2. Partial plan (1" = 30' or larger) and details for the infiltration trench showing:
5 kdh cuo - Bypass structure,
%�e t C to - Maintenance access,
3Hrele 431410 - Basin bottom dimensions,
5I,ec f 6lo - Basin cross-section with benchmark for sediment cleanout,
544e 16to - Flow distribution detail for inflow,
N/ A- Vegetated filter, and
56s'f Ito - - Pretreatment device.
J(,&_Ee Lo 3. Section view of the infiltration trench (1"= 20' or larger) showing:
- Pretreatment and treatment areas, and
��;n Noun. - Inlet and outlet structures.
!L 4. A table of elevations, areas, incremental volumes & accumulated volumes to verity 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 DWO, by completing & submitting the soils
investigation request form. County soil maps are not an acceptable source of soils information.
CS 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.
A } 8. A copy of the signed and notarized operation and maintenance (0&M) agreement.
N/A 9. A copy of the deed restrictions (if required).
Form SW401-Infiltration Trench-Rev.3 Part III. Required Items Checklist, Page 1 of 1

Permit No. J W7os (o3
(to be provided by DWO)
��� O=gyp WArp,,
STORMWATER MANAGEMENT PERMIT APPLICATION FORM o�C
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.
Project Name
The North Carolina Aquarium Pier at Nags Head
Contact Person
David A. Dee], P.E.
Phone Number
[phone]
Date
10/2912008
Drainage Area Number
West Parcel (DA 4)
IL DESIGN INFORMATION
Site Characteristics
Drainage area 22,096.00 ftz
Impervious area 1y.499.00- flz 3
r ���'�Z
�
Percent impervious 0.47 % '
Design rainfall depth 1.50 in FEB 18 2009
Peak Flow Calculations
1-yr, 24-hr runoff depth
1-yr, 24-hr intensity
Pre -development 1-yr, 24-hr runoff volume
Post -development 1-yr, 24-hr runoff volume
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
in
in/hr
it
ff3
75ft3 foI of RunofG 17 q((eYie'c 6Yo610?e W//� lvflS40ne
3,913.00 tt3 grovel 60;e, 75ycF i3 eloro�e rrt'd aAce grouet 6o,e
4,721.DD tt3 I" oceWklfq tUV,
751 cf -2401,00- ft3
I, 517 287dc00- ft3 OK
sand
20.00 inthr
2.00 fatal
0.04 days
3.00
:1
3.00
fmsl
4.50
fmsl
2,481.00
f 2
5.50
first
35,01 -58-60' If
21 , 1 1 •23:80- ft
75s 9,381-00- f?
OK
OK
Rini BSintotto Mdst$e-eHeasi-2 4 agave SHW9 ,Rule. uj(:Ck
Wo 4ffee
Oyt ! O.ItG:-3 ?[rwe ]: :.; t'• sp' in JAW C]d✓vu�lF.
�etia'.iPr Crorn gee M;'llga{rii F� ?�d C�c /1 kv' �(,,; �Ju
C'dc1'C(: ]i.-d,�t- 31�C w.Il, e:ilC�' srora�4' nal
0 -'- FernEa�te Lavr�v,�f �'a�j
Form SW401-Infiltration Basin-Rev.3 Parts I. & It. Design Summary, Page 1 of 2

Permit No.
(to be provided by DWO)
Additional Information
Maximum runoff to each inlet to the basin?
0.58
ac-in
Length of vegetative filter for overflow
n/a
it
Distance to structure
16.70
It
Distance from surface waters
255.00
ft
Distance from water supply well(s)
i 1Od -A�fi—
ft
Separation from impervious soil layer
n/a
ft
Naturally occuring soil above shwt
1.00
ft
Bottom covered with 4-in of clean sand?
Y
(Y or N)
Proposed drainage easement provided?
n/a
(Y or N)
Capures all runoff at ultimate build -out?
Y
(Y or N)
Bypass provided for larger storms?
Y
(Y or N)
Pretreatment device provided
Y
OK
OK
OK
OK
OK
OK
OK
OK
OK
OK
OK
v
Form SW401-Infiltration Basin-Rev.3 Parts I. a II. Design Summary, Page 2 of

Permit
(to be provided by DWQ)
III. REQUIRED ITEMS CHECKLIST
Please indicate the page or plan sheet numbers where the supporting documentation can be found. An incomplete submittal package will
result in a request for additional information. This will delay final review and approval of the project. Initial in the space provided to
indicate the following design requirements have been met. If the applicant has designated an agent, the agent may initial below. If a
requirement has not been met, attach justification.
Page/ Plan
Initials Sheet No.
7D� PIaLiL fq o 1. Plans (1" - 50' or larger) of the entire site showing:
- Design at ultimate build -out,
N/A - Off -site drainage (if applicable),
App, G vF Narr. - - Delineated drainage basins (include Rational C coefficient per basin),
c-3 - Basin dimensions,
C 3r `s - Pretreatment system,
C3 - High flow bypass system,
C - Maintenance access,
N/A - Proposed drainage easement and public right of way (ROW),
C 3 - Overflow device, and
f9(A - Boundaries of drainage easement.
C; c 10 2. Partial plan (1" = 30' or larger) and details for the infiltration basin showing:
C 3 - - Bypass structure,
C 3 - Maintenance access,
C 3 - Basin bottom dimensions,
C 9 - Basin cross-section with benchmark for sediment cleanout,
C9 - Flow distribution detail for inflow,
NA - Vegetated filter, and
L::,C 9 - Pretreatment device.
51 a th ", G10 3. Section view of the infiltration basin (V = 20' or larger) showing:
- Pretreatment and treatment areas, and
- Inlet and outlet structures.
� - NorNN r Roo, 4. A table of elevations, areas, incremental volumes & accumulated volumes to verify the volume provided.
f '� Na*r App, A 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 DWO, by completing & submitting the soils
investigation request form. County soil maps are not an acceptable source of soils information.
t>ra t) %:J C 5 6. A construction sequence that shows how the infillration basin will be protected from sediment until the
entire drainage area is stabilized.
Nigh 1 7. The supporting calculations.
t ' . 8. A copy of the signed and notarized operation and maintenance (0&M) agreement.
�(� R 9. A copy of the deed restrictions (if required).
Form SW401-Infiltration Basin-Rev.3 Page 1 of 1 Part III. Required Items Checklist, Page 1 of 1

Permit
(to be provided by DWO)
FMA O2p4 W RTFgOG
NSTORMWATER MANAGEMENT PERMIT APPLICATION FORM o�t
NCDENR 401 CERTIFICATION APPLICATION FORM
PERMEABLE PAVEMENT SUPPLEMENT
This form must be filled out, printed and submitted.
The Required Items Checklist (Part III) must be printed, filled out and submitted along with all of the required information.
Project Name
Contact Person
Phone Number
Date
Drainage Area I Lot Number
Lot Owner's Signature
The North Carolina Aquarium Pier at Nags Head
David A. Deel, P.E.
[phone]
2/13/2009
UA I6 DA2
I1--DESIGKINFCIRMATION ?� a -
Soils Report Summary
Soil type sand
Infiltration rate 20.00 in/hr OK
SHWT elevation 3.00 fmsl
Credit Calculation- Enter an Y in the appropriate cell below
Within 112 mile of & draining to SA waters?
Permeable concrete without a gravel base
Permeable concrete with at least 6" gravel base
Flexible pavements with at least 4" gravel base
Flexible pavements with at least 7' gravel base
Bottom elevtion of the permeable pavement cross-section
SA of permeable pavement being proposed
Resulting BUA counted as impervious
Y Y/N
x
7.70
mist
33,660.00
fe
23,562.00
ftz
Managed Grass Factor:
0.3
OK
Additional Information
Slope of permeable pavement
0.50
%
OK FEB 18 2009
Construction sequence minimizes compaction to soils?
Y
Y/N
OK
Traffic volume (vehicles per day)
5.00
v/day
OK •. 1 • r �'•3{'�
��'
Washed stone is specified for the gravel layer (if used)?
Y
Y/N
OK :/" •, .1 ` r °'
Concetrated flow from roofs & other surfaces directed away?
Y
Y/N
OK
Additional Information for Residential Lots Only
Total BUA allocated to this lot
ft2
Remaining lot BUA available
h2
Application Approved
Application Rejected
Reason for rejecting application:
Signature of permittee / HOA:
Date
Form SW401-Permeable Pavement-Rev.t
Parts I. a II. Design Summary, Page 1 of 1

Permit
(to be provided by OWO)
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.
(�A D
fan 3W, 3
1. Plans (1 = 50' or larger) of the entire site showing:
Naval tie App,
Design at ultimate build -out,
Off -site drainage (If applicable),
Delineated drainage basins (include Rational C coefficient per basin),
Location of permeable pavement,
Roof and other surface flow directed away from permeable pavement,
Ploy SS a cto
2. Section view of the permeable pavement (V = 20' or larger) showing:
- Layers, and
-SHWT
801T*ilde
"d ty
3. 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 DWO, by completing & submitting the soils
investigation request form. County soil maps are not an acceptable source of soils information.
OAD
& ]� C5
4. A construction sequence that shows how the permeable pavement will be protected from sediment until
the entire drainage area is stabilized.
a a e 5. The supporting calculations.
AP(;eoc v
l� 1 Al tea i •i 6. A copy of the signed and notarized operation and maintenance (0&M) agreement.
w/NegkA!Z
I16a -3/6_ 7. A copy of the deed restrictions (if required)
Example #1
Project is a lot with a maximum allowed BUA of 5,000 sq. ft. that drains to class SC waters.
Project proposes a 1,000 sq. ft. permeable concrete driveway with a 6" gravel base.
Managed grass factor = 0.6
1000 x 0.6 = 600 square feet is counted as managed grass.
1000 - 600 = 400 square feet is counted as built -upon area.
5000 - 400 = 4,600 square feet available for house and other BUA.
Example #2
Project is a high density commercial site with a 5,000 square foot parking lot.
Project is within 1/2 mile of and draining to SA waters. An infiltration system is proposed.
The parking lot will handle <100 cars per day and is a flexible pavement with a 4" gravel base.
Managed grass factor is one half of 0.4. = 0.2
5000 x 0.2 = 1000 square feet is counted as managed grass.
5000 - 1000 = 4,000 square is counted as impervious.
The total BUA used to calculate the minimum volume draining to the
infiltration system can be reduced by 1,000 square feet.
Form SW401-Permeable Pavement-Rev.1 Page 1 of 1 Part III. Required Items Checklist, Page 1 of 1

Permit
(to be provided by DWO)
A20f W ATF90
MI STORMWATER MANAGEMENT PERMIT APPLICATION FORM o€
Ni 401 CERTIFICATION APPLICATION FORM
PERMEABLE PAVEMENT SUPPLEMENT
This form must be filled out, printed and submitted.
The Required Items Checklist (Part 1/1) must be printed, filled out and submitted along with all of the required information.
Project Name
Contact Person
Phone Number
Date
Drainage Area / Lot Number
Lot Owner's Signature
The North Carolina Aquarium Pier at Nags Head
DA4
IIEDESIGNIINF,ORMATION
Soils Report Summary
Soil type sand
Infiltration rate 20.00 in/hr OK
SHWT elevation 2.00 fmsl
Credit Calculation- Enter an Y in the appropriate cell below
Within 1/2 mile of & draining to SA waters?
Permeable concrete without a gravel base
Permeable concrete with at least 6' gravel base
Flexible pavements with at least 4" gravel base
Flexible pavements with at least 7' gravel base
Bottom elevtion of the permeable pavement cross-section
SA of permeable pavement being proposed
Resulting BUA counted as impervious
Y Y/N
x
3.90 first
5,009.00 fiz
3,506.30 flz
Additional Information
Slope of permeable pavement
0.50
%
OK
Construction sequence minimizes compaction to soils?
Y
Y/N
OK
Traffic volume (vehicles per day)
5.00
v/day
OK
Washed stone is specified for the gravel layer (if used)?
Y
YIN
OK
Concetrated flow from roofs & other surfaces directed away?
Y
Y/N
OK
Additional Information for Residential Lots Only
Total BUA allocated to this lot ft2
Remaining lot BUA available ft,
Application Approved
Application Rejected
Reason for rejecting application:
Signature of permitlee / HOA:
Date
=7
reli:I F/a« 2'10 40lx1rt clue la ii1e reAevejri
FEB 18 2009
Form SW401-Permeable Pavement-Rev.t Pans I. & I. Design Summary, Page 1 of 1

Permit
(to be provided by DWO)
IIL REQUIRED ITEMS CHECKLIST - — —
Please indicate the page or plan sheet numbers where the supporling 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.
np� for, Sl Id 1. Plans It" = 50' or larger) of the entire site showing:
Normfive App, Design at ultimate build -out,
Off -site drainage (if applicable),
Delineated drainage basins (include Rational C coefficient per basin),
Location of permeable pavement,
Roof and other surface flow directed away from permeable pavement,'
-bAD— Plan 51 CIO 2. Section view of the permeable pavement It" = 20' or larger) showing:
- Layers, and
-SHWT
Norra't 3. A soils report that is based upon an actual field investigation, soil borings, and infiltration tests. The
JTtJ"dV 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.
DAD of C5 4. A construction sequence that shows how the permeable pavement will be protected from sediment until
the entire drainage area is stabilized.
DAD— a ai e 5. The supporting calculations.
APhP,w jx
--DAL i y 6. A copy of the signed and notarized operation and maintenance (0&M) agreement.
w/NtrNr
1){I IJ A�A_ 7. A copy of the deed restrictions (if required).
Example #1
Project is a lot with a maximum allowed BUA of 5,000 sq. ft. that drains to class SC waters.
Project proposes a 1,000 sq. ft. permeable concrete driveway with a 6" gravel base.
Managed grass factor = 0.6
1000 x 0.6 = 600 square feet is counted as managed grass.
1000 - 600 = 400 square feet is counted as built -upon area.
5000 - 400 = 4,600 square feet available for house and other BUA.
Example #2
Project is a high density commercial site with a 5,000 square foot parking lot.
Project is within 1/2 mile of and draining to SA waters. An infiltration system is proposed.
The parking lot will handle <100 cars per day and is a flexible pavement with a 4" gravel base.
Managed grass factor is one half of 0.4. = 0.2
5000 x 0.2 = 1000 square feet is counted as managed grass.
5000 - 1000 = 4,000 square is counted as impervious.
The total BUA used to calculate the minimum volume draining to the
infiltration system can be reduced by 1,000 square feet.
Form SW401 Permeable Pavement-Rev.1 Page 1 of 1 Part III. Required Items Checklist, Page 1 of 1

Permit Number: 514�0 'I)D3
(to be provided by DWQ)
Drainage Area Number: i b-''�,
Infiltration Trench 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 integ�>��°�����
of structures, safety of the public, and the removal efficiency of the BMP.
Important maintenance procedures:
NOV - 5 2008
— The drainage area of the infiltration trench will be carefully managed to redy+�gUUVV ^,� t tIVfltARQ
the sediment load to the sand filter. t�JJ
— The water level in the monitoring wells will be recorded once a month and after
every storm event greater than 1.0 inches (or 1.5 inches if in a Coastal County).
The infiltration trench 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 grass filter strip or
Areas of bare soil and/or
Regrade the soil if necessary to
other pretreatment area
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.
Sediment has accumulated to
Search for the source of the
a depth of greater than six
sediment and remedy the problem if
inches.
possible. Remove the sediment and
dispose of it in a location where it
will not cause impacts to streams or
the BMP.
The flow diversion
The structure is clogged.
Unclog the conveyance and dispose
structure (if applicable)
of any sediment off -site.
The structure is damaged.
Make any necessary repairs or
replace if damage is too large for
re air.
Form SW401-Infiltration "french O&M-Rev3 Paee I of 3

BMP element:
Potentialproblem:
How I will remediate theproblem:
The trench
Water is ponding on the
Remove the accumulated sediment
surface for more than 24
from the infiltration system and
hours after a storm.
dispose in a location that will not
impact a stream or the BMP.
The depth in the trench is
Remove the accumulated sediment
reduced to 75%, of the original
from the infiltration system and
design depth.
dispose in a location that will not
impact a stream or the BMP.
Grass or other plants are
Remove the plants, preferably by
growing on the surface of the
hand. If pesticide is used, wipe it on
trench.
the plants rather than spraying.
The observation well(s)
The water table is within one
Contact the DWQ Stormwater Unit
foot of the bottom of the
immediately at 919-733-5083.
system for a period of three
consecutive months.
The outflow pipe is clogged.
Provide additional erosion
protection such as reinforced turf
matting or riprap if needed to
prevent future erosion problems.
The outflow pipe is damaged.
Repair or replace the pipe.
The emergency overflow
Erosion or other signs of
The emergency overflow berm will
berm
damage have occurred at the
be repaired or replaced if beyond
outlet.
repair.
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.
Fonn SW401-Infiltration Trench O&M-Rev.3 Page 2 of 3

Permit Number:
(to be provided b), DWQ)
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:NCDENR, Division of North Carolina Aquariums
BMP drainage area number: F6-h1- Pnyet (OR i-. 1-+ 2-)
Print name:David Griffin
Title:Director, North Carolina Aquariums
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, �nls� inP ��/�� a Notary Public for the State of
County of ()AR t , do hereby certify that
bou t o Q R) t n> personally appeared before me this a
day of o (�46,KIm , &� , and acknowledge the due execution of the
forgoing infiltration trench maintenance requirements. Witness my hand and official
seal,
CHRISTINE A.BOYLE
NOTARY PUBLIC
DARE COUNTY, NC
SEAL
My commission
)-(�- ao)a.
Form SW401-Infiltration Trench O&M-Rev.3 Page 3 of 3

Permit Number: ��% D?//33
(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 w 1Lb
corrected, repaired or replaced immediately. These deficiencies can affect the integpitytEIVED
of structures, safety of the public, and the removal efficiency of the BMP.
NOV - 5 2008
Important maintenance procedures:
— The drainage area will be carefully managed to reduce the sediment load tVN(1_WAR0
infiltration basin. �L
— 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-Rev3 Page I of 3

BMP element:
Potentialproblem:
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 Pagc 2 of 3

Permit Number:
(to be 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 ncune:NCDENR, Division of North Carolina Aquariums
BMPdrainageareammrzber: Wej� (DA4)
Print name:David Griffin
Title:Director, North Carolina Aquariums
Note: The legally responsible party should not he 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 R�IS'i'tnQ 22kk , a Notary Public for the State of
�1C County of D,4Rt do hereby certify that
A V t o0 GR) ff't" personally appeared before me this ag
day of 06GG -M 3 and acknowledge the due execution of the
forgoing infiltration basin maintenance requirements. Witness my hand and official seal,
Eat
CHRISTINE A. BOYLE
NOTARY PUBLIC
DARE COUNTY, NO
SEAL
My commission expires / ` 6 - a O )a
Form SW401-Infiltration Basin O&M-Rev3 Page 3 of 3

Permit Numher. SW %oS11 —C!1
(to be provided bY DWQ)
Drainage Area / Lot Number:_] '�_
Permeable Pavement 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 willie�����®
corrected, repaired or replaced immediately. These deficiencies can affect the integ"rity.
of structures, safety of the public, and the removal efficiency of the BMP. ?
NOV - 5 200E
Important operation and maintenance procedures:
— Stable groundcover will be maintained in the drainage area to reduce the sed0tVVtQ_WAR0
load to the permeable pavement.
— The area around the perimeter of the permeable pavement will be stabilized and
mowed, with clippings removed.
— Any weeds that grow in the permeable pavement will be sprayed with pesticide
immediately. Weeds will not be pulled, since this could damage the fill media.
— Once a year, the permeable pavement surface will be vacuum swept.
— At no time shall wet sweeping (moistening followed by sweeping) be allowed as a
means of maintenance.
— There shall be no repair or treatment of Permeable Pavement surfaces with other
types of pavement surfaces. All repairs to Permeable Pavement surfaces must be
accomplished utilizing permeable pavement which meets the original pavement
specifications.
— Concentrated runoff from roof drains, piping, swales or other point sources,
directly onto the permeable pavement surface shall not be allowed. These areas
must be diverted away from the permeable pavement.
Initial Inspection: Permeable Pavements shall be inspected monthly for the first three
months for the following:
BMP element:
Potentialproblem:
How to remediate theproblem:
The perimeter of
Areas of bare soil and/or
In the event that rutting or failure of the groundcover
the permeable
erosive gullies have
occurs, the eroded area shall he repaired immediately
pavement
formed.
and permanent groundcover re-established.
Appropriate temporary Erosion Control measures (such
as silt fence) shall be installed in the affected area
during the establishment of permanent groundcover,
and any impacted area of permeable pavement is to be
cleaned via vacuum sweeping.
The surface of the
Rutting / uneven
This indicates inadequate compaction of the pavement
permeable
settlement
base / sub -base. If rutting or uneven settlement on the
pavement
order of'/2 inch or greater occurs, permeable pavement
shall he removed and base / sub -base re -compacted,
smoothed, and permeable pavement shall then be re-
installed. Base and sub -base compaction shall be
monitored by a licensed gcotechnical engineer to ensure
that infiltration capacity of base and sub -base are not
compromised by compaction and smoothing processes.
The pavement does not
Vacuum sweep the pavement. If the pavement still
dewater between storms,
does not dewater, consult a professional.
or water is running off.
Form SW40 I -Permeable Pavement O&M-Rev3 Page 1 of 3

Permit Number:
(to be provided br DWQ)
Drainage Area / Lot Number:
The permeable pavement 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 to remediate theproblem:
The perimeter of the
Areas of bare soil and/or erosive
Regrade the soil if necessary to remove
permeable pavement
gullies have formed.
the gully, and then plant a ground cover
and water until it is established.
Provide lime and a one-time fertilizer
application.
Vegetation is too short or too
Maintain vegetation at a height of 3 to 6
long.
inches (remove clippings).
The surface of the
Trash/debris is present.
Remove the trash/debris.
permeable pavement
Weeds are growing on the
Do not pull the weeds (may pull out
surface of the permeable
media as well). Spray them with
pavement.
pesticide.
Sediment is present on the
Vacuum sweep the pavement.
surface.
The structure is deteriorating or
Consult an appropriate professional.
damaged.
Damaged areas of the pavement shall he
removed and repaired.
The pavement does not dewater
Vacuum sweep the pavement. If the
between storms.
pavement still does not dewater, consult
a professional. Permanently clogged
pavement shall he removed and
repaired.
Form SW401-Permeable Pavement O&M-Rev.3 Page 2 of 3

Permit Number:
(to be provided by DWQ)
I acknowledge and agree by my signature below that I am responsible for the
performance of the maintenance procedures listed above. 1 agree to notify DWQ of any
problems with the system or prior to any changes to the system or responsible party.
Prgjecl name:NCDENR, Division of North Carolina Aquariums
BMP drainage area or lot number: La4 51,4p Paned ar'! U)"4 Para/ (DA's ham. A
Print name:David Griffin
Titic:Director, North Carolina Aquariums
Address:3125 Poplarwood Court, Suite 160, Raleigh, NC 27604
Phon
Sign
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.
I, Ov � rye P am/ k , a Notary Public for the State of
e County of 01)2 L , do hereby certify that
�aU -1(4 t-to personally appeared before me this a�
day of 0 Q4(, hG , 9008 , and acknowledge the due execution of the
forgoing permeable pavement maintenance requirements. Witness my hand and official
seal,
SEAL
-
Di ' H.F.Y PUnLtO
p,E COUNTY PtC
My commission expires / / a(0 ) a
Form SW401-Permeable Pavement O&M -Rev.3 Page 3 of 3