SW8060606_CURRENT PERMIT_20061024

STORMWATER DIVISION CODING SHEET
POST -CONSTRUCTION PERMITS
PERMIT NO.
SW
DOC TYPE
� CURRENT PERMIT
❑ APPROVED PLANS
❑ HISTORICAL FILE
❑ COMPLIANCE EVALUATION INSPECTION
DOC DATE
2�Zp2�4
YYYYMMDD

O�O W A TF�,�G
O Y
October 24, 2006
Mr. James Junkin, President
D.L. Rogers Corp.
5013 Davis Blvd.
North Richland Hills, TX 76180
Subject: Stormwater Permit No. SW8 060606
Sonic Drive In - Jacksonville
High Density Project
Onslow County
Dear Mr. Junkin;
Michael F. Easley, Governor
William G. Ross Jr., Secretary
North Carolina Department of Environment and Natural Resources
Alan W. Klimek, P.E. Director
Division of Water Quality
The Wilmington Regional Office received a Stormwater Management Permit Application for
Sonic Drive in on August 15, 2006 with additional information received on October 6, 2006. 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 21-1.1000. We are forwarding Permit No. SW8
060606 dated October 24, 2006, for the construction of the subject project.
This permit shall be effective from the date of issuance until October 24, 2016, 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 sixty (60) days following receipt of
this permit. This request must be in the form of a written petition, conforming to Chapter 1506 of the
North Carolina General Statutes, and filed with the Office of Administrative Hearings, P.O. Drawer
27447, Raleigh, NC 27611-7447. Unless such demands are made this permit shall be final and
binding.
If you have any questions, or need additional information concerning this matter, please contact Mary
Jean Naugle, or me at [phone],
Sincer
Edward Beck
Regional Supervisor
Surface Water Protection Section
ENB/mjn: S:1WQSISTORMWATIPERMIT1060606 oct06
cc: Crystal Coast Engineering, PA
Onslow County Building Inspections
M.J. Naugle
Wilmington Regional Office
Central Files
NyNae tcarolina
turally
North Carolina Division of Water Quality 127 Cardinal Drive Extension Wilmington, NC 28405 Phone [phone]
Wilmington Regional Office tntemet wwvv-.ncwaterquality.org Fax [phone]
An Equal Opportunity/Affirmative Action Employer — 50% RecycledM% Post Consumer Paper
Customer Service
1-877-623-6748

State Stormwater Management Systems
Permit No. SW8 060606
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
James Junkin, President and D.L. Rogers Corp.
Sonic Drive In
261 Freedom Way, Jacksonville, NC 28544
Onslow County
FOR THE
construction, operation and maintenance of a wet detention pond 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 a part of this permit.
This permit shall be effective from the date of issuance until October 24, 2016, and
shall be subject to the following specified conditions and limitations:
I. DESIGN STANDARDS
1. This permit is effective only with respect to the. nature and volume of stormwater
described in the application and other supporting data.
2. This stormwater system has been approved for the management of stormwater
runoff as described in Section 1.6 on page 3 of this permit. The stormwater
control has been designed to handle the runoff from 37,928 square feet of
impervious area.
3. The tract will be limited to the amount of built -upon area indicated on page 3 of
this permit, and per approved plans.
4. 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 area of this
project must be directed into the permitted stormwater control system.
Page 2 of 7

State Stormwater Management Systems
Permit No. SW8 060606
6. The following design criteria have been provided in the wet detention pond and
must be maintained at design condition:
a. Drainage Area, acres: 1.06
Onsite, ft : 46,027
Offsite, ft2: 0
b.
Total Impervious Surfaces, ft2:
37,928
C.
Design Storm, inches:
1
d.
Pond Depth, feet:
4.5
e.
TSS removal efficiency:
90 %
f.
Permanent Pool Elevation, FMSL:
34.5
g.
Permanent Pool Surface Area, ft2:
3,064
h.
Permitted Storage Volume, ft3:
4,702
i.
Temporary Storage Elevation, FMSL:
35.41
j.
Controlling Orifice:
1" 0 pipe
k.
Permitted Forebay Volume, ft3:
1,036
I.
Fountain Maximum, hp.
118
M.
Receiving Stream/River Basin:
UT to Wallace Creek
n.
Stream Index Number:
19-20
o.
Classification of Water Body:
"SB:NSW"
II. SCHEDULE OF COMPLIANCE
1. The stormwater management system shall be constructed in its entirety,
vegetated and operational for its intended use prior to the construction of any
built -upon surface.
2. During construction, erosion shall be kept to a minimum and any eroded areas of
the system will be repaired immediately.
3. The permittee shall at all times provide the operation and maintenance
necessary to assure the permitted stormwater system functions at optimum
efficiency. The approved Operation and Maintenance Plan must be followed in
its entirety and maintenance must occur at the scheduled intervals including, but
not limited to:
a. Semiannual scheduled inspections (every 6 months).
b. Sediment removal.
C. Mowing and re -vegetation 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 outlet structure, orifice device, flow
spreader, catch basins and piping.
g. Access to the outlet structure must be available at all times.
Page 3 of 7

State Stormwater Management Systems
Permit No. SW8 060606
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. Decorative spray fountains will be allowed in the stormwater treatment system,
subject to the following criteria:
a. The fountain must draw its water from less than 2' below the permanent
pool surface.
b. Separated units, where the nozzle, pump and intake are connected by
tubing; may be used only if they -draw water from the surface in the
deepest part of the pond.
c. The falling water from the fountain must be centered in the pond, away
from the shoreline.
d. The maximum horsepower for a fountain in this pond is 1/8 horsepower.
6. The facilities shall be constructed as shown on the approved plans. This permit
shall become void unless the facilities are constructed in accordance with the
conditions of this permit, the approved plans and specifications, and other
supporting data.
7. Upon completion of construction, prior to issuance of a Certificate of Occupancy,
and prior to operation of this permitted facility, a certification must be received
from an appropriate designer for the system installed certifying that the permitted
facility has been installed in accordance with this permit, the approved plans and
specifications, and other supporting documentation. Any deviations from the
approved plans and specifications must be noted on the Certification. A
modification may be required for those deviations.
8. 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. The permittee shall submit final site layout and grading plans for any permitted
future areas shown on the approved plans, prior to construction.
12. A copy of the approved plans and specifications shall be maintained on file by
the Permittee for a minimum of ten years from the date of the completion of
construction.
Page 4 of 7

State Stormwater Management Systems
Permit No. SW8 060606
13. 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 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 formal permit transfer request to the Division of Water Quality,
accompanied by a completed name/ownership change form, 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. The permittee is responsible for compliance with all permit
conditions until such time as the Division approves the transfer request.
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 143-215.6A to 143-215.6C.
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) having 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 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.
6. The permit may be modified, revoked and reissued or terminated for cause. The
filing of a request for a permit modification, revocation and re -issuance or
termination does not stay any permit condition.
7. 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.
8. Approved plans and specifications for this project are incorporated by reference
and are enforceable parts of the permit.
9. The permittee shall notify the Division any name, ownership or mailing address
changes within 30 days.
Permit issued this the twenty-fourth day of October 2006.
NORTH CAROLINA ENVIRONMENTAL MANAGEMENT COMMISSION
i
�v
7o—rAfgn W. Klimek, P.E., Director
Division of Water Quality
By Authority of the Environmental Management Commission
Page 5 of 7

State Stormwater Management Systems
Permit No. SW8 060606
Sonic Drive In
Stormwater Permit No. SW8 060606
Onslow Countv
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 6 of 7

State Stormwater Management Systems
Permit No. SW8 060606
Certification Requirements:
.1. The drainage area to the system contains approximately the permitted
acreage.
2. The drainage area to the system contains no more than the permitted
amount of built -upon area.
3. All the built -upon area associated with the project is graded such that the
runoff drains to the system.
4. All roof drains are located such that the runoff is directed into the system.
5. The outlet/bypass structure elevations are per the approved plan.
6. The outlet structure is located per the approved plans.
7. 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. Required drawdown devices are correctly sized per the approved plans.
.13. All required design depths are provided.
.14. All required parts of the system are provided, such as a vegetated shelf,
and a forebay.
15. The required system dimensions are provided per the approved plans.
cc: NCDENR-DWQ Regional Office
Onslow County Building Inspections
Page 7 of 7

K5 16'2006 15:a6 910-346-1210 JOWN FIERCE SURVEYOR FOrE 02
OFFICE USE 0\L1' -I
Datc Received 1 ce Paid Permit Number
- g -r]-o Co 4oao- St3cbS �5S
State of North Carolina
Department of Environment and Natural Resources
Division of Water Quality
STORI'IWATER IMANAGE.NTENT PERMIT APPLICATION FORM
This fai,ri maY he phorneolned fir use as an original
1, GENERAL, 1NFO1t;4ATIO
I. Applicants name (Specify The name of tho corporazion, individual- etc, who owns the project):
D.L. Rogers Corp.
2- Print OwneriSigning Official's ,aa.me and title (person legally responsible for facility and compliance):
James Junkin, PresidE:nt
3. Mailing Address for person listed in item 2 above:
5013 Davis Blvd.
City. North Richland Hi.116 _ Statc, TX yip:: 76180
Telephone Number: ( 817 ) 428- �Zo'7-7
4, Praiect Name (subdivision, FacLity, ter- ectabUshmctit name - should be consistent with project name on plans,
; pecifications, letters, operatio l and niainkt nance agrCCments,
Sonic Drive In
5. Location aFPro ect (street address):
near intersection of Freedom Wary (NC 24) and Piney Green Road
City: Jacksonville _ _ County:011s1ow
6. Di.rections to prk,jcct (From nearest major intersection):
From the intersection of NC 24 and US 17 in Jacksonville, east on NC 24 appmximately 6.6 miles to Piney Green
Shopping Center, site of left
7. Lathudc: 34 42' 59" Longitttdc: 77 19' 21"
of project
S- Contact person who can answer questions about: the prc.ject:
Name_ David K. Newsom, PE Telephone Number: (� 910 ) 325-0006
11, PERA11T INFORMATION-.
1- Specify whether project is (eliccl; one); X New Rencimal_Modification
For SWU-101 VLTsion 3.99 Page l of 4

105/1 bl tht=16 15: r36 91 k1-34b-1216
3OHN PIERCE SURVEYOR PAGE 03
2- if this application is being suhrnitted as the result of a renewal or modification to an existing permit. list die
existing permit numher _ and its issue date (if known)
3. Specify the type ofprnject (ch-zck onc):
__—Low Ocnsir.y h�I11gh Density Redevelop Gcnerai Pcrmir. Outer
4, Additionai Project Requirentcias (check applicable blanks):
�CAMA ijicir X Sedimentation ,'T'rosion Control 404:401 Permit _NPD.ES Stormwalcr
Information on required statc pen -nits can be obtained by contacting the Customer Service Center at
1-8777-623-6748.
111, PROJECT INFORMATION
1, In the space provided below, - immarizt h.ow st.orrnwater will be treated Also attach a detailed narrative
(ortc to two pages) describing stormw filer ntanagemcnt for the project.
Stormtvater will be collected and di-+erted to wet detention pond,
2, Stormw'ater runoff frnrn this prr,jecr drains to the River basin.
3. Total Project Area 1.06 acres 4- .Project Built. Upon Area: 82.4%
5. How many drainage areas does the project Dave?_ I
6. Complete the following information for czaeh drainage area. If there are snore than two drainage areas in the
project, attach an additional ghret with the information for each area provided in rite same format as below.
... ., ,r, ... ..
DrAtna a Ares`
.. :: _ . : • ;.
Receiving Stream Narne
UT Wallace Creek
Y
Receiving StrcarnClass
S$;NSW
Drainage Area
46,027 sf 1.06 ac)
Existing Impervious* Area
-0-
Proposed Impervious*Area
37,928 sf
% Emperviouc* Area (total)
32.4%
Im'..eri�ious.rSarfIec-;Are' ....`....
�: -
: Dt'sista e-Area=1W.:--�':
;�I]raiiiAizi=2. .... ..
(fin -site Buildings
2,300 sf
On -Site 9trects
On -site Parking
28,790 sf
on -site Sidewalks
5,039 sf
other on -site future reserve
1,800 sf
U1 -tiite
Total: 37,92.3 sf
Total:
* Impervious area it eej pact aF the, built upon area urchiding, bro not limited to, huildin,gs, roads, parking ands,
31dewalhs, �P-avel art-nx. etc.
Forni SWU-101 Version 3.99 rage 2 of 4

'05I161'2006 15:06 910-946-1210 JOHN PIERCE SURVEYOR
7, How was the off -site impervious area listed above derived?
IV. DEED RTSTRiCT.I!ONS A."M PROTECTIVE COVENANTS
Tlie following italicized deed restrictions and protective covenants arc required to he recorded for all
subdivi,siong, outparccl, and Tutu,-: devclopr vent print to the sale of any lot, If lot sizes vary, .9ignificantly, a table
lictittg each lot number, size acid t;ie allowable built -upon area for each lot must be provided as an attachment.
I. The.1bl1r»i4ng covenans are intended to ensure ongoing compliance a+,itlt stole .stormtii Ater managemHnt Permit number
us issued hl' the Division ctf Warm Quality, These cove anr.F may nut b .
changed or delrred ivirhout rhr? Gorisent ofthft State.
2. No m ore. than , ,equate feat of any !nt shall be covered h-v simorurm of imperviomu materials.
ltrperririu.s materials include ❑spl alf, vmvl, comxete, hr£ek, .Ftone, slate or.vimilar marerial but do not include uxrod
deeking or the waterstur ce afsnirnming pools,
3. Sirvle.s shall not be filled in: griped, .jr altered except as .ncceesai- to pi oi,r'de drivewuy crossings.
4. Built -upon area in excess of the permitted amount requires a .ctaia srnrmvvarer managemem permit modirication prior to
co nStruc do n.
�. All permifled runoff front oufprrcel., orfuture developine rtshall he directed into the i�ermitted ,S'tormivc7trrC4nh'ol
,�rstem. These conneelions to the storlmVoler colttrol system shall be performed in a manner that maintains the integrity
and perfurmance of the rt:sicm osl ermivad,
By your ai%nature below, you certifi that the recorded deed restrictions and protective covenants for this projecl
shall include all the applicable item: required above, that the covenants will be bindnig on all parties and persons
claintirig under them, that they will run wiili the land, that the requited covenants carrot be changed or deleted
without concurrence from the State, and that they will be recorded prior to the ia(c of any lot.
V. SUPPLEI IFNT FORNIS
The applicable state slorinwater managemcnt.permit supplement-forni(s) listed-belowtrust be �ubiiiittzCl roe= each
--13NIP spe`cificd-(Tihipr project. C ont.,ct, the Stonnwatcr and Gcncral Termite Unit at [phone] for the starits
and availability of these forms.
Form SNVU-102
fret. Detention f;agin Supplement
Form SWU-103
lnfittratipn Basin Supplement
Forth S'+'`rU• 104
Low Density Supplement
Forin SWU-10
Curl) Outlet Sys:eni Supplement
Form SWU-1 06
Off -Site System Supplement
Forth SWU-'l07
Underground Imii.ltration Wrench Supplement
Form SWU-104
Ncuse River Basitt Supplement
Form SIVU-109
Innovative Best Management Practicc Supplement
Form SWU-101 Version 3.99 Page 3 of 4

05/16/2006 15:06 910-346-1210 JOHN PIERCE SURVEYOR PAGE Fly
VL SUBMITTAL RF_QUIRE:11.1;NTS
Only complete application packai;es will he accepted and reviewed by the Division of Water Quality (DWQ).
A complete package include.,i all of the items listed below. The complete application package should be
submitted to the appropriate DWQ Regional Office.
1, Plc. -Ise indicate that you have provided the following required information by initialing in the space provided
next to arch item,
Jnitials
• Original and one copy of Lhc Stormwater lvlanagement Permit APpliontion Form D&LI
• One cop, of the applicable 5:ipplemcnt Form(s) for each BIVIP % 16
• Permit application processing fee of $420 (payable to .NCD`1L4R) � 1
• Detailed narrative description of storm.vater treatment/ managemt nl rif/
• Two copies of plans and specifications, including:
- Developmcnt/Pr„iect name
- Engineer grid 'llrr i
-Legend
- North arrow
- SGAIe
- Revision number & date
N—fean high water line
- Dimensioned prr perry/proiec:t boundary
- 1,octition map with named streets or NCSR numbers
- Origival contours, proposedcontours, spot elevations, firuished floor elevations
- Details of roads, drainage fealures, collection systems, and stormurater control measures
Wetlands delineated, or a note on plans tliat none exist
- Existing drainage (including off -sits), drainage ewemcnts, pipe sizes, runoff calculations
Drainage areas delineated
- Vegetated buffer. (where required)
V1I. AGENT AUTITORTZA,'rio1V
IF you wish to dciisnaLc authority to another individual or firm so that dicy may provide infarmation (in your
behalf; please complete this section.
Designated agent (inclividital or firr�t):CTystal Coast Engineering, PA
Mailing Address:3817-3 Freedom'Way
Cits.: Htxhert -- --- state ?VC Lip:28539
Phone: (_910 1 325-0006 T'aX: j 910 325-0060
vill. APPI-KANT`S CERTIFICATION
1. (print or type naiue of person listed iA, General In_foomation, item 1) James Junki.n, President _
certify that the infonnatiort included on this permit application form is, to the best of my knowtedge, correct And
(lint the project mAIl.bo Con:+trLtcte ovfortmancc with the approved plans, that the required deed restrictions
and protecLive VCn nis wi e{Larded, and that the proposed project complies with the requirements of I.5A
NCAC 21-1.10 �J
Signature; ` bate: / �(�
/—[J—arneeTunn, President
Form SVII-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 rnuY be photocopied for use as an origimat
DWQ Stormwater Management Plan Review:
A complete stormwater management plan submittal includes an application form, a vet detention basin
supplement for each basin, design calculations, and plans and specifications showing all basin and outlet
structure details.
1. PROJECT INFORMATION
Project Name: Sonic Drive In
Contact Person: David K. Newsom, PE, Crystal Coast Engineering, PA Phone Number: ( 910 ) 325-0006
For projects with multiple basins, specify which basin this worksheet applies to: I
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
SAIDA i
Diameter of Orifice
Design Rainfall
Design TSS Removal 2
30.00 ft. (floor of the basin)
34.50 ft. (elevation of the orifice)
35.41 ft. (elevation of the discharge structure overflow)
3,064 sq, ft. (water surface area at the orifice elevation)
1.06 ac. (on-sile and off -site drainage to the basin)
0.87 ac. (on -,site and off site drainage to the basin)
4,702 cu. ft. (combined volume of main basin andforebay)
3,109 Cu. ft. (volume detained above the permanent pool)
1,036 cu. ft. (approximately 20% of total volume)
6,592 (surface area to drainage area ratio.froin DPVQ table)
1.00 in. (2 to 5 day temporary pool drain -down required)
V
in.
90 % (ininimian 85% required)
Fonn SWU-102 Rev 3.99 Page I of 4

Footnotes:
I when using the Division SAIDA tables, the correct SA/DA ratio for permanent pool siring should be computed based upon the
actual impervious % and permanent pool depth. Linear interpolation should be employed to determine the correct value for non-
standard table entries.
2 In the 20 coastal counties, the requirement For a vegetative filter may be waived if the wet detention basin is designed to provide
90% TSS removal. The NCDENR E3iMP manual provides design tables for both 85No TSS removal and 90% TSS removal,
11. 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
T P7 "i' / 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 r7
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.
li. 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) C 4-1 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.
011 m. An echanism is specified which will drain the basin for maintenance or an emergency.
Ill. 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 s not incorporate a vegetated filter at the outlet.
This system (check one) 0 does t does not incorporate pretreatment other than a forebay.
Form SWU-102 Rev 3.99 Page 2 of 4

Maintenance activities shall be performed as follows:
After every significant runoff producing rainfall event and at least monthly:
a. Inspect the wet detention basin system for sediment accumulation, erosion, trash accumulation,
vegetated cover, and general condition.
b. Check and clear the orifice of any obstructions such that drawdown of the temporary pool occurs within
2 to 5 days as designed.
2. Repair eroded areas immediately, re -seer] as necessary to maintain good vegetative cover, more vegetative
cover to maintain a maximum height of six inches, and remove trash as needed.
1 Inspect and repair the collection system (i.e. catch basins, piping, swales, riprap, etc.) quarterly to maintain
proper functioning.
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 3.37 feet in the main pond, the sediment shall be removed.
When the permanent pool depth reads 2.62 feet in the forebay, the sediment shall be removed.
BASIN DIAGRAM
(Jill in the blanks)
Permanent fool Elcvation 34.50
Sediment Remova El. 31.88 75d�p
— ----- / Sediment Removat Elcvation 31.13 75�0
Bottom Elevation 31.00 25% --- —T,. .` .T--.------- ---'
FOREBAY
Bottom Elevation 30.00 1 25%
MAIN POND
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.
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

' 05i 16+?2006 15: 06 910-346-1210 JOHN PIERCE SURVEYOR PfII,,-;E 09
7. All components of the wkct deter titan basin system shall be maintained ill good working order,
i acknowledge and agree by my signature below that i ain responsible for the performance of the semen
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 pam.
Print name: James Junkin
Title: President
Add ress:—_—%13 76180
Note: The legally re�ronsiblc party should not be a homeowners a tshciation unless more than S()an or the lots havc been sold and a
resident of the subdivision has hews named the prcaidcnt,
t.Y�i 1��Q5 ; a Notary Public For the State ofxa
County of , do hereby certify that
personally appeared before me this_ day of , and acknowledge the due
execution of the forgoing wet detention basin maintenance requirements. Witness my hand and official seal,
`
PP
SHAREE NWAMS
yrr
-": ?1 My l; MMISSION EXPIRES
`? ?< d&MM a 2010
SEAL
My commission expires .1D 11D
Form .,wI1-Ip2, Rcv 3,99 Page 4or4

Design Calculations
Stormwater Treatment Facilities
for
Sonic Drive -In
located in
Onslow County
`,„ „eirr 111
�O 'O�r
_AL
148
p
5-1 10106
1. PROJECT DESCRIPTION
The Project consists of a proposed Sonic Drive -In on a 1.06 acre tract and associated sitework.
2. COMPUTE POND AREA REQUIRED
a. Compute Percent Impervious:
Impervious Areas:
On -Site Buildings
On -Site Streets
On -Site Parking
On -Site Sidewalks
Other on -site
Off -site
Sub -Total
FUTURE
FUTURE(reserved)
Total
Total Area Drainage to Pond:
Percent Impervious =
b. Compute Pond Surface Area
Using Surface Area to Drainage Area Ratio Chart for 90% TSS Removal (copy attached) and
assuming foot pond depth:
SA/DA = „;_><6i5023% (interpolated)
Therefore:
Surface Area = SAIDA x Drainage Area
3,034 SF say kd SF

c. Compute Minimum Pond Dimensions
Assume rectangular shape with 3:1 Length (L) to Width (W) Ratio:
Length = 95.87 feet
Width = 31.96 feet
Site conditions, however, dictate irregular shaped pond:
Hydr. Length feet
.........
so, Hydr. Width 32.0 feet (avg)
Actual LIW = 3.0 (irregular shape)
3. DETERMINE VOLUME TO BE CONTROLLED FROM 1" STORM
Using Schuler "Simple Method".
Rv = 0.05 + 0.009(l) where I = percent impervious
Rv = 0.792 in/in
Control Volume = Design Rainfall x Rv x Drainage Area
Control Volume = 3,036 CF say CF
4. DETERMINE REQUIRED STORAGE DEPTH
Assume: 3:1 side slopes
solving for depth (d) by trial & error:
d = 0.91
5. DETERMINE ORIFICE SIZE
Control Volume must be drawn down over a 2 day - 5 day period.
Using orifice equation, solve for Diameter (D) that results in 3-1/2 day period:
D = (Q / 0.026 (h)")"
Where: Q = (Control Volume / 3.5 days x 86,400 sec/day)
0.010 cfs
h d 12
0.46
Solving for D:

D = 0.76 Use>' '1 Oi3" pipe
Actual Drawdown with actual drawdown pipe diameter (using orifice equation):
Q= 0.018 cfs
Draw Down Period = 2,05 days OK , < 5.0
6. SELECT OUTLET STRUCTURE DIAMETER
Size outlet structure such that depth of Q10 flow <1.0 feet:
Using Rational Formula (Q=CIA) where:
Cimper = 0$s
Ccum = ~:0.69
110 = ZQ inlhr
A - .........:.. 1.06 ac
Q10 = 5.50 cfs
Assuming 1/2 circumference is used as weir and using
Francis Formula (Q=3.33LH"5) to solve for L such that H = 1.0:
L = 1.65 Feet
Min 24 inch diameter outlet structure
Use 30 inch diameter outlet structure
7. DETERMINE Q10 STAGE
Q10 = 5.50 cfs
Using Francis Formula (Q=3.33LH''S) solve for H:
H 10 = 0.56 feet
8. DETERMINE Q100 STAGE (ELEV. OF EMERGENCY SPILLWAY)
Using Rational Formula (Q=CIA) where:
Ccum = 0.69
1100 =< s?inlhr
Q 100 = 6.24
Using Francis Formula (Q=3.33LH''5) solve for H:
H 100 = 0.61 feet

9. DETERMINE Q100 STAGE OVER EMERGENCY SPILLWAY (TOP BERM ELEV.)
Assume primary spillway blocked (i.e., emergency spillway to accommodate Q100)
Emergency spillway shall be a broad crested earthern weir designed to pass 100 year storm.
Using broad crested weir equation H = (QICw x L)2/3
where: Q = Q100 6.24 cfs
Cw = 3.0
Length = «` feet
H = 0.22 feet
10. FOREBAY SIZING
Compute Actual Pond Volumes (using average end method):
Avg
I ncr.
I ncr.
Cum.
Main Bay Volume:
Elevption &e-a—(SF
Area SF
D t F
Vol(CF)
Vol CF
Pond Bottom
::.:<...30.Ofl.......... ............. :...
Bottom Veg Shelf
B3' 6
352
2.83
995
995
Normal Pond
345. 0; 2526:
1,600
1.67
2,671
3,666
Main Bay Volume =
Forebay Volume
Pond Bottom
Normal Pond
Forebay Volume =
Total Pond Volume =
Forebay Volume equates to
Temp. Storage Volume
Normal Pond
Temp. Pond Level
Temp. Pool Volume =
0 YrSto Vplume
Temp Pond Level
Temp. Pond Level
3,666 CF
ev ti Area (SE Area SF Depth (FT) VolC VolC
..........................
31.00 ............
34.50 .... ,... 53$; 296 3.50 1,036 1,036
1,036 CF
4,702 CF
22.0 % of Total Volume
Elevation Area (SE Area SF Depth F Vol (_CF) Vol (CF
34.50 3,064
3;7691 3,417 0.91 3,109 3,109
3,109 CF
Elevation Area (SE Area SF Depth (FT) VolCF Vol (CF)
35.41 3,769
3,998 0.56 2,245 2,245

Temp. Pool Volume =
2,245 CF
100 Yr Storage Volume : Elevation Area (SE) Area SF Depth (FT) Vol CF Vol F
Temp Pond Level 35.41 3,769
Temp. Pond Level 36OZ' 4 68' 4.019 0.61 2,453 2,453
Temp. Pool Volume = 2,453 CF
11. SUMMARY
Pond Elevations:
Top Berm (minimum)
H= 0.22
100-Yr. Flood
H100 = 0.61
10-Yr. Flood
H10 = 0.56
1-inch Storage
storage depth = 0.91
Permanent Pool
pond depth = 4.5
Pond Bottom
12. WET DETENTION BASIN SUPPLEMENT
Basin Bottom Elevation
30.00
Perm, Pool Elevation
34.50
Temp. Pool Elevation
35.41
Perm Pool Surface Area
3,064 SF
Drainage Area
1.06 AC
Impervious Area
0.87 AC
Perm. Pool Volume
4,702 CF
Temp Pool Volume
3,109 CF
Forebay Volume
1,036 CF
SA/DA
6.5923
Diameter of Orifice
1.00
Design Rainfall
1"
Design TSS Removal
90%
e ative
Actual
6.24
36.24
6.02
36.02 (emerg. weir elev)
5.97
35.97
5.41 35.41 (primary weir elev)
4.50 34.50 (invert out elev)
o «.>ty

Stormwater Treatment &
Erosion Control Narrative
Sonic Drive In
D.L. Rogers Corp. proposes to construct a restaurant facility on a 1.06 acre lot located near the intersection of
NC 24 and Piney Green Road in Jacksonville, Onslow County. The site is currently vacant, however,
previously accommodated a car repair shop which has recently been removed.
The project site is tributary to an UT of Wallace Creek (SB;NSW) in the White Oak Basin. The proposed
development activities are high density (percent impervious > 25 %); therefore, stormwater treatment facilities
are required. The attached Stormwater Plan includes a 3,064 sf wet detention basin located at the eastern
side of the site (across Glade Lane).
The proposed pond is sized for 90% TSS removal. The pond does not incorporate pretreatment, other than
the forebay. The pond does not include a vegetated filter at the outlet.
All stormwater emanating from new impervious surfaces that is generated on -site shall be collected and
directed to the wet pond.
The treatment system will require periodic maintenance. Maintenance frequency shall be dictated by pond
depths. Pond depths shall be checked by the owner on a quarterly basis. When measured depths are less
than that specified on the application, the pond shall be manually dewatered (pump) and accumulated
sediment removed and properly disposed of.
Site topography is gently sloping (0 — 5%) with the lowest elevations towards the northerly boundary of the
tract. Significant fill materials will be required to raise site to required grade.
The entire area designated within "Clearing Limits" will be disturbed during initial construction, and will include
grading for parking, swales and storm drainage.
During construction, all runoff will be diverted by a series of temporary diversion ditches and/or storm drain
pipes to the Treatment Pond. The treatment pond is of adequate size and volume to contain sediment from
the entire disturbed area during construction. The pond will be dewatered and accumulated sediment
removed when the site is adequately stabilized.

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