SW7040401_CURRENT PERMIT_20040601

STORMWATER DIVISION CODING SHEET
POST -CONSTRUCTION PERMITS
PERMIT NO.
SW
DOC TYPE
� CURRENT PERMIT
APPROVED PLANS
❑ HISTORICAL FILE
DOC DATE
Q%Dl1()(v0
WYYMMDD

wi A -rF Michael F. Easley, Go emo0
William G. Ross Jr., Secretary
North Carolina Department of Environment and Natural Resources
Alan W. Klimek, P.E. Director
Coleen Sullins, Deputy Director
Division of Water Quality
DIVISION OF WATER QUALITY
June 1, 2004
Mr. Don Williams, Vice President
JDM of The Outer Banks, Inc.
P.O. Box 1179
Nags Head, NC 27959
Subject: Permit No, SW7040401
Sonic of Grandy
High Density Stormwater Project
Currituck County
Dear Mr. Williams:
The Washington Regional Office received a completed Stormwater Application for the subject project on April 5, 2004.
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. We are forwarding Permit No. SV 7040401 dated June 1, 2004 to JDM of
The Outer Banks, Inc. for the construction and operation of grassed swales and a wet detention pond and an infiltration basin
to serve Sonic of Grandy located in Grandy, NC. This permit will replace permit SW7031208 issued February 5, 2004
This permit shall be effective from the date of issuance until June 1, 2014 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 conomming this matter, please contact Roger Thorpe at
[phone], extension 214.
Sincerely,
Al Jfm mulligan
Water Quality Regional Supervisor
Washington Regional Office
cc: Hyman & Robey
Currituck County Inspections
Washington Regional Office
Central Files
Washington Regional Office 943 Washington Square Mall, Washington NC 27889 252.946.6481(telephone), 252.946.9215(fax)

i
State Stormwater Management Systems
Permit No. SW7040401
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
JDM of The Outer Banks, Inc.
Currituck County
FOR THE
construction, operation and maintenance of stormwater management systems in compliance with the provisions of 15A NCAC
2H.1000 (hereafter referred to as the "stormwater rules) and the approved stormwater management plans and specifications
and other supporting data as attached and on file with and approved by the Division of Water Quality and considered apart of
this permit for grassed swales, an infiltration basin and a wet detention pond to serve Sonic of Grandy located in Grandy, NC.
This permit replaces permit SW7031208 issued February 5, 2004.
This permit shall be effective from the date of issuance until June 1, 2014 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.
2. This stormwater system has been approved for the management of stormwater runoff as described on page 2 of this
permit, the Project Data Sheet,
3. Approved plans and specifications for this project are incorporated by reference and are enforceable parts of the
permit.

DIVISION OF WATER QUALITY
PROJECT DATA
Project Name:
Sonic of Grandy
Permit Number:
SW7040401
Location:
Currituck County
Applicant:
JDM of The Outer Banks, Inc.
Mailing Address:
P.O. Box 1179
Nags Head, NC 27959
Application Date:
4/5/2004
Receiving Stream:
UT to Popular Branch Bay
Classification of Water Body:
C
Total Site Area:
13.17 ac
Total Impervious:
2.79 ac
Wet Pond Depth:
5.0 ft
Required Storage Volume:
6,601 of
Provided Storage Volume:
11,358 of
Required Surface Area:
6,240 sf
Provided Surface Area:
16,157 sf
Controlling Orifice:
1 and 3/4 inch @ elev 8.10 ft
Infiltration Basin Depth :
2.5 feet
Required Storage Volume:
3,744 of
Provided Storage Volume:
6,290 of
Overflow Elevation:
11.5 feet
4k

'4. No homeowner/lot owner/developer shall be allowed to fill in, alter, or pipe any vegetative practices (such as swales)
shown on the approved plans as part of the stormwater managementsystem without. submitting a revision to the
permit and receiving approval.from the Division.
5. The following items will require a modification to the permit:
a. Any revision to the approved plans,'regardless of size
b. Project name change
C. Transfer of ownership
d. Redesign or addition to the approved amount of built -upon area
e. Further subdivision of the project area.
In addition, the Director may determine that other revisions to the project should require a modification to the permit.
6. 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.
SCHEDULE OF COMPLIANCE
The permittee will comply with the following schedule for construction and maintenance of the stormwater
management system.
a. 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 surfaces except roads.
b. During construction, erosion shall be kept to a minimum and any eroded areas of the system will be repaired
immediately.
The facilities must be properly maintained and operated at all times. The approved Operation and Maintenance Plan
must be followed in its entirety and maintenance must occur at the scheduled intervals.
3. The permittee shall at all times provide the operation and maintenance necessary to assure the permitted stormwater
system functions at optimum efficiency including, but not limited to:
a. Semiannual scheduled inspections (every 6 months)
b. Sediment removal
c. Mowing and revegetation of side slopes
d. Immediate repair of eroded areas
e. Maintenance of side slopes in accordance with approved plans and specifications
f. Debris removal and unclogging of outlet structure, orifice device and catch basins and piping.
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. 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. Upon completion of construction 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. Mail the Certification to
the Washington Regional Office, 943 Washington Square Mall, Washington, North Carolina, 27889, attention Division
of Water Quality.
7. A copy of the approved plans and specifications shall be maintained on file by the Perrnittee for a minimum of five
years from the date of the completion of construction.

III: GENERAL CONDITIONS
1. This permit is not transferable. In the event there is a desire for the facilities to change ownership, or there is a name
change of the Permittee, a formal permit request must be submitted to the Division of Water Quality accompanied by
an application fee, documentation from the parties involved, and other supporting materials as may be appropriate.
The approval of this request will be considered on its merits and may or may not be approved.
2. 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*143-215.6(a) to 143-
215.6(c).
3. 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) which
have jurisdiction.
4. 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.
5. 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.
Permit issued this the 1 st day of June, 2004.
NORTH CAROLINA ENVIRONMENTAL MANAGEMENT COMMISSION
Alan W. Klimek, P.E. Director
Division of Water Quality
By Authority of the Environmental Management Commission
Permit Number SW7040401

Sonic of Grandy
Stormwater Permit No. SVV7040401
Designer's Certification
I, , as a duly
registered Professional Engineer in the State of North Carolina, having been authorized to observe (periodically/weekly/full
time)
the construction of the project,
for
Project)
(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.
Signature
Registration Number
Date

Energy, Mineral &
Land Resources
$-NV1P0NMr"TAL QUALITY
September 20, 2017
Boom of North Carolina, Inc.
Attention: Bob Elmerick, Vice President
5623 Fairfield Road
Columbia, SC 29203
Dear Elmerick:
w61 Ad
ROY COOPER
Governor
MICHAEL S. REGAN
Secl el al y
TRACY i]AVIS
Uir, eclor'
Subject: Stormwater Permit Renewal & Ownership Change
Stormwater Management Permit SW7040401
Sonic of Grandy, NC
Currituck County
A Division of Energy, Mineral, and Land Resources file review has determined that
Stormwater Permit SW7040401 for a stormwater infiltration basin serving the Sonic
located at Grandy, NC expires on June 1, 2018. Renewal applications are due 180 days
prior to expiration. The permit was originally issued to JDM of the Outer Banks, Inc. A
search of the Currituck County tax records shows that the property covered under this
permit is now owned by Boom of North Caroline, Inc. North Carolina General Statutes
and the Coastal Stormwater rules require that this property be covered under a
stormwater permit.
Please submit a completed permit renewal application along with a $505.00 fee for
permit renewal and an ownership change application with another $505.00 application
fee. Permit application forms for renewal and ownership change can be found on our
website at:httpsaldep.nc._ovlabout/divisions/energy-mineral land-resources/energy-
mineral.-land-rules/stormwa_t_er-program/post-construction ~
North Carolina General Statutes and the Coastal Stormwater rules require that this
property be covered under a stormwater permit. Failure to maintain a permit subjects
the owner to assessment of civil penalties.
If you have questions, please feel free to contact me at [phone]. 1 will be glad to
discuss this by phone or meet with you.
Sincerely,
oger K. Thorpe
Environmental Engineer
— Nothing Compares --,,,.-
"late of With Carolina I Environlncntal llnatity f finercly, Mincr.=f and Land Resource~
W;rshlnoton Rrnirnrahf)fIirr. 104a Wavhinntnn ImI Mall I Wachinnlon, W. 7%RR4

Compliance Inspection Report
Permit: SW7040401 Effective:06/01/04 Expiration: 06/01/18
Project: Sonic of Grandy
Owner: JDM of The Outer Banks Inc
County: Currituck
Region: Washington
Contact Person: Jeff Elliott
Directions to Project:
Adress: Caratoke Hwy
City/State/Zip: Grandy NC 27939
Titte: President
Type of Project: State Stormwater - HD - Detention Pond State Stormwater - Infiltration System
Drain Areas: 1 - (Currituck Sound) (03-01-54) ( SC)
On -Site Representative(s):
Phone: [phone]
Related Permits:
Inspection Date: 03/06/2019 Entry Time: 10:30AM Exit Time: 11:00AM
Primary Inspector: William J Moore
Secondary Inspector(s):
Reason for Inspection: Routine
Permit Inspection Type: State Stormwater
Facility Status: ❑ Compliant 0 Not Compliant
Question Areas:
State Stormwater
(See attachment summary)
Phone: [phone] Ext.264
Inspection Type: Compliance Evaluation
page: 1

Permit: SW7040401 Owner - Project: JDM of The Outer Banks Inc
Inspection Date: 03/06/2019 Inspection Type Compliance Evaluation Reason for Visit: Routine
Inspection Summary:
Site inspection of stormwater system at Sonic of Grandy. Infiltration basins along front of property were dry and appear
to be draining properly; some minor erosion observed. Excessive overgrowth of vegetation and significant erosion
observed around wet pond. Erosion along pond slopes & dike breached near corner of wp. WP not maintained.
PE Certification, signed O&M and request for ownership change needed. NOV and follow-up needed.
Built Upon Area
Is the site BUA constructed as per the permit and approval plans?
Is the drainage area as per the permit and approved plans?
Is the BUA (as permitted) graded such that the runoff drains to the system?
Comment:
5W Measures
Are the SW measures constructed as per the approved plans?
Are the inlets located per the approved plans?
Are the outlet structures located per the approved plans?
Comment:
Operation and Maintenance
Are the SW measures being maintained and operated as per the permit requirements?
Are the SW BMP inspection and maintenance records complete and available for review or provided to
DW4 upon request?
Comment: see summary comments
Yes No NA NE
® 110 ❑
® ❑ ❑ ❑
• ❑ ❑ ❑
Yes No NA NE
®❑❑❑
Yes No NA NE
❑ ■❑❑
❑ ❑❑■
page: 2

zOFFICI USE ONLY
Date Received Fee Paid Permit Number
State of North Carolina
DWQ'WA
artment of Environment and Natural Resources
Division of Water Quality
STORMWATER MANAGEMENT PERMIT APPLICATION FORM
This form may be photocopied for use as an original
I. GENERAL INFORMATION
1. Applicants name (specify the name of the corporation, individual, etc. who owns the project):
J.D.M. of The Outer Banks, Inc.
2. Print Owner/Signing Official's name and title (person legally responsible for facility and compliance):
Don Williams, Vice Pres�id6nt t,,,
3. Mailing Address for person listed in item 2 above:
PO Box 1179
City: Nags Head
Telephone Number: (_ 252 ) 4 41- 8 0 8 3
State: NC Zip. 27959
4. Project Name (subdivision, facility, or establishment name - should be consistent with project name on plans,
specifications, letters, operation and maintenance agreements, etc.):
Sonic of Grandy
5. Location of Project (street address):
Caratoke Hwy.
City: Grandy County: Currituck
6. Directions to project (from nearest major intersection):
Project is located on west side of US 158 (Caratoke Hwy).directl
across from the intersection with SR 1131(Poplar Branch Road).
7. Latitude: 36 0 15, Longitude: 75 0 53, of project
8. Contact person who can answer questions about the project:
Name: Jeff Elliott Telephone Number:
II. PERMIT INFORMATION:
1. Specify whether project is (check one): X New Renewal
252 1207-4770
Modification
Form SWU-101 Version 3.99 Page 1 of 4

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 X High Density Redevelop General Permit Other
4. Additional Project Requirements (check applicable blanks):
CAMA Major X Sedimentation/Erosion Control _404/401 Permit X NPDES Stormwater
Information on required state permits can be obtained by contacting the Customer Service Center at
1-877-623-6748.
III. 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 will sheet flow across improved areas to grass lined swales
with 3:1 side slopes. Drainage to the front of the site will he routed to an
infiltration basin. Drainage to the rear of the site will be routed to a wet_ detention
basin.
2. Stormwater runoff from this project drains to the P a s qu o t a n k River basin.
3. Total Project Area: 13 . 17
acres 4. Project Built Upon Area: %
5. How many drainage areas does the project have? 4
6. 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.
Basin Information
Drainage Area 1
Drainage Area 2
Deceiving Stream Name
Poplar Branch Bay
Receiving Stream Class
Sc
Sc
Drainage Area
1.82
9.55
Existing Impervious* Area
_ 0 _
_ 0 _
Proposed Impervious`Area
1.01 AC
1.49 C
% Impervious" Area (total)
5 5 . 4 9 %
15.60 %
Iinpervioiis"'Surface"AAi6a
; Drainage -Area 1',.
r ` "%Drainage Area 2
On -site Buildings
0.21 AC
0. 13 AC
On -site Streets
On -site Parking
0.8 AC
1.36 AC
On -site Sidewalks
Other on -site
Off -site
Total: 1.01 AC
Total: 1.49 AC _
Impervious area is defined as the built Upon area including, but not limited to, buildings, roads, parking areas,
sidewalks, gravel areas, etc.
See attachment for areas 3 & 4
Farm SWU-101 Version 3.99 Page 2 of 4

ATTACHMENT TO STORMWATER MANAGEMENT APPLICATION
Sonic of Grandy
jBasin Ifimatiori ` ' ' Drainage Bas ni 3
10
1...._.....,.......u...ba..L.�.i_....r--'l: a�14 I.-...�.-- .. .....,n...� .....L..,� wA..a:u:..w.Wr.?..;...e.2i:1�.l,.�Yu:,....�u....��.trJNI1.
Receiving Stream Name
Receiving Stream Class
Drainage Basin Area
Existing Impervious Area
Proposed Impervious Area
% Impervious Area (total)
Poplar Branch Bay
SC
298 Ac
-0-
0.18 Ac
6.04%
r.,.;.,—r-,,.y..Y......�.^—r•?. �perviousSurface ^.r,°�"-."��-o..-r•1f••^•^^t •,.�.t�-�+r^r,.�m ,,...�.�r'"......_r.•Y-,.«•°...�.�,..•,.....••j....•^r.....,,.—•.W..e .�..,�•—w n-#n
.' Area _- y .Drairiage Basin 3 M, - �
�_ �_...._::,�,.,�... a..,.- ......,. w...... .—.,.�.. _�� wow.��.�.:.�..�.�..:.»�iw....k..,�..::. ,.
On -site Buildings
-0-
On-site Streets
0.18 Ac
On -site Parking
-0-
On-site Sidewalks
-0-
Other on -site (residential construction)
-0-
Off-site
-0-
TOTAL:
0.18 Ac
DTaina e'Basin .4' 1 .
Basin InformatioriwL , ��,.�„��.,,a�;,_ g� _,-
Receiving Stream Name
Receiving Stream Class
Drainage Basin Area
Existing Impervious Area
Proposed Impervious Area
% Impervious Area (total)
Poplar Branch Bay
SC
0.81 Ac
-0-
0.11 Ac
13.58%
Im ervious`Surface'Area Dr i ii e. :;' i
Y _- i.1.......�::,...miwtc.7,._.t..L.4.,6i�sit.,..�-_._-..�.._.-. g B a.41 n �.�.' t _{h �ii. 7t i'� a� .k 7} � ' , � �� • i } . ,
On -site Buildings
-0-
On-site Streets
0.11 Ac
On -site Parking
-0-
On-site Sidewalks
-0-
Other on -site (residential construction)
-0-
Off-site
-0-
TOTAL:
0.11 Ac

7. How was the off -site impervious area listed above derived? N / A
IV. DEED RESTRICTIONS AND PROTECTIVE COVENANTS
The following italicized deed 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.
The following covenants are intended to ensure ongoing compliance with state stormwater management permit number
as issued by the Division of Water Quality. These covenants may not be
changed or deleted without the consent of the State.
2. No more than square feet of any lot shall be covered by structures or impervious materials.
Impervious materials Include asphalt, gravel, concrete, brick, stone, slate or similar material,but do not include wood
decking or the water surface of swimming pools.
3. Swales shall not be filled in, piped, or altered except as necessary to provide driveway crossings.
4. Built -upon area in excess of the permitted amount requires a state stormwater management permit modification prior to
construction.
5. All permitted runoff from outparcels or future development shall be directed into the permitted stormwater control
system. These connections to the stormwater control system shall beperformedin a manner that maintains the integrity
and performance of the system as permitted.
By your signature below, you certify that the recorded deed restrictions and protective covenants for this project
shall include all the applicable items required above, 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 State, 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 and General Permits Unit at [phone] for the status
and availability of these forms.
Form SWU-102
Wet Detention Basin Supplement
Form SWU-103
Infiltration Basin Supplement
Form SWU-104
Low Density Supplement
Form SWU-105
Curb Outlet System Supplement
Form SWU-106
Off -Site System Supplement
Form SWU-107
Underground Infiltration Trench Supplement
Form SWU-108
Neuse River Basin Supplement
Form SWU-109
Innovative Best Management Practice Supplement
Form SWU-101 Version 3.99 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 Regional Office.
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 Sl-J
• One copy of the applicable Supplement Form(s) for each BMP �s
• Permit application processing fee of $420 (payable to NCDENR) S�
• Detailed narrative description of stormwater treatment/management w
• Two copies of plans and specifications, including: S�
- 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, please complete this section.
Designated agent (individual or firm): Hyman & Robey , PC
Mailing Address: 150—A US Hwy 158 East
City: Camden State: NC Zip: 27921
Phone: ( 252r _) 335-1888 Fax: ( 252-- ) 338-5552
VIII. APPLICANT'S CERTIFICATION —
I, (print or type name ofperson listed in General Information; item 2) pon W ' 11 i
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 cov ants will be recorded, and that the proposed project complies with the requirements of 15A
NCAC 2H .1000.E �i/`"�
Signature: Date: - Q
Form SWU-101 Version 3.99 Page 4 of 4

Permit No.
(to be provided by DWQ
State of North Carolina
Department of Environment and Natural Resources
Division of Water Quality
STORMWATER MANAGEMENT PERMIT APPLICATION FORM
WET DETENTION BASIN SUPPLEMENT
This form may be photocopied for use as an original
DWQ Stormwater'Management Plan Review:
A complete stormwater management plan submittal includes an application form, a. wet detention basin
supplement for each basin, design calculations,_ and plans and specifications showing all basin and outlet
structure details.
I. PROJECT INFORMATION
Project Name: Sonic of Grandy
Contact Person: Jeff Elliott Phone Number:
For projects with multiple basins, specify which basin this worksheet applies to: _
elevations
Basin Bottom Elevation
Permanent Pool Elevation
Temporary Pool Elevation
areas
Permanent Pool Surface Area
Drainage Area
Impervious Area
volumes
Permanent Pool Volume
Temporary Pool Volume
Forebay Volume
Other parameters
SA/DA 1
Diameter of Orifice
Design Rainfall
Design TSS Removal 2
Form SWU-102 Rev 3.99
207-4770
3.10
ft.
(floor of the basin)
8. 10
ft.
(elevation of the orifice)
8.78
ft.
(elevation of the discharge structure overflow)
16,157
sq. ft.
(water surface area at the orifice elevation)
9.55
ac.
(on -site and off -site drainage to the basin)
1.49
ac.
(on -site and off -site drainage to the basin)
51 768 cu. ft. (combined volume of main basin and forebay)
11 , 358 cu. ft. (volume detained above the permanent poop
5 , 5 3 4 cu. ft. (approximately 20% of total volume)
1 • 5 (surface area to drainage area ratio from DWQ table)
1.75 in. (2 to 5 day temporary pool draw -down required)
10 year DkX
9 0 / % (minimum 85 o required)
Page 1 of 4

Footnotes:
When using the Division SA/DA tables, the correct SA/DA ratio for permanent pool sizing should be computed based upon the
actual impervious % and permanent pool depth. Linear interpolation should be employed to determine the correct value for non-
standard table entries.
In the 20 coastal counties, the requirement for a vegetative filter may be waived if the wet detention basin is designed to provide
90% TSS removal. The NCDENR BMP manual provides design tables for both 85% TSS removal and 90% TSS removal.
II. REQUIRED ITEMS CHECKLIST
The following checklist outlines design requirements per the Stormwater Best Management Practices Manual
(N.C. Department of Environment, Health and Natural Resources, February 1999) and Administrative Code
Section: 15 A NCAC 2H .1008.
Initial in the space provided to indicate the following design requirements have been met and supporting
documentation is attached. If the applicant has designated an agent in the Stormwater Management Permit
Application Form, the agent may initial below. If a requirement has not been met, attach justification.
Applicants Initials
a. The permanent pool depth is between 3 and 6 feet (required minimum of 3 feet).
b. The forebay volume is approximately equal to 20% of the basin volume.
c. The temporary pool controls runoff from the design storm event.
d. The temporary pool draws down in 2 to 5 days.
e. If required, a 30-foot vegetative filter is provided at the outlet (include non -erosive flow
calculations)
f. The basin length to width ratio is greater than 3:1.
g. The basin side slopes above the permanent pool are no steeper than 3:1.
h. A submerged and vegetated perimeter shelf with a slope of 6:1 or less (show detail).
i. Vegetative cover above the permanent pool elevation is specified.
j. A trash rack or similar device is provided for both the overflow and orifice.
k. A recorded drainage easement is provided for each basin including access to nearest
right-
of-way.
1. If the basin is used for sediment and erosion control during construction, clean out. of the
basin is specified prior to use as a wet detention basin.
m. A mechanism is specified which will drain the basin for maintenance or an emergency.
III. WET DETENTION BASIN OPERATION AND MAINTENANCE AGREEMENT
The wet detention basin system is defined as the wet detention basin, pretreatment including forebays and the
vegetated filter if one is provided.
This system (check one) 0 does I1does not incorporate a vegetated filter at the outlet.
This system (check one) 61does 0 does not incorporate pretreatment other than a forebay.
Form SWU-102 Rev 3.99 Page 2 of 4

Attachment to WET DETENTION BASIN SUPPLEMENT
For Sonic of Grandy
e. Pond has been designed for 90% TSS removal.
k. The pond is located entirely on the project property and discharges into an
existing ditch located on the property line.
m. Emergency drain would have to be located below the seasonal water table. Pond
must be emptied by pumping.

Maintenance activities shall be performed as follows:
1. After every significant runoff producing rainfall event and at least monthly:
a. Inspect the wet detention basin system for sediment accumulation, erosion, trash accumulation,
vegetated cover, and general condition.
b. Check and clear the orifice of any obstructions such that drawdown of the temporary pool occurs within
2 to 5 days as designed.
2. Repair eroded areas immediately, re -seed as necessary to maintain good vegetative cover, mow vegetative
cover to maintain a maximum height of six inches, and remove trash as needed.
3. Inspect and repair the collection system (i.e. catch basins, piping, swales, riprap, etc.) quarterly to maintain
proper functioning.
4. Remove accumulated sediment from the wet detention basin system semi-annually or when depth is
reduced to 75% of the original design depth (see diagram below). Removed sediment shall be disposed of
in an appropriate manner and shall be handled in a manner that will not adversely impact water quality (i.e.
stockpiling near a wet detention basin or stream, etc.).
The measuring device used to determine the sediment elevation shall be such that it will give an accurate
depth reading and not readily penetrate into accumulated sediments.
When the permanent pool depth reads 3.7 5 feet in the main pond, the sediment shall be removed.
When the permanent pool depth reads 2.2 5 feet in the forebay, the sediment shall be removed.
BASIN DIAGRAM
ill in the blanks)
Permanent Pool Elevation 8 . 10
Sediment Re oval El. 5 - 8 5 175 o
______________• _ Sediment Removal Elevation 4.35 75/0
Bottom Ele ation 5 . 1 d � %-------------------------------------___- __----
Bottom Elevation 3 . 10 25 /v
FOREBAY MAIN POND
5. Remove cattails and other indigenous wetland plants when they cover 50% of the basin surface. These
plants shall be encouraged to grow along the vegetated shelf and forebay berm.
6. If the basin must be drained for an emergency or to perform maintenance, the flushing of sediment through
the emergency drain shall be minimized to the maximum extent practical.
Form SWU-102 Rev 3.99 Page 3 of 4

7. All components of the wet detention basin system shall be maintained in good working order.
I acknowledge and agree by my signature below that I am responsible for the performance of the seven
maintenance procedures listed above. I agree to notify DWQ of any problems with the system or prior to any
changes to the system or responsible party.
Print name: Don Williams
Title: Vice -President, J.D. M. of The Outer Banks, Inc.
Address: PO Box 1179, Nags Head, NC 27959
Phone: [phone] „
Signature: li✓
Date: '�/- a-0/`"
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,'CY1o�rlac,c, R S, , a Notary Public for the State of`t"1oC�� CGcol���
County of PGs_',do hereby certify that C)g'r-, w 1 \GmS
personally appeared before me this ca? d day of Qn r- ;1 , aooy , and acknowledge the due
execution of the forgoing wet detention basin maintenance requirements. Witness my hand and official seal,
VAMM&O"
NOMPM
ftswMOMIC
SEAL
My commission expires LP -- J 9 ` b%
Form SWU-102 Rev 3.99 Page 4 of 4