SW8070808_CURRENT PERMIT_20211209

STORMWATER DIVISION CODING SHEET
POST -CONSTRUCTION PERMITS
PERMIT NO
SW8 0-1 O so g
DOC TYPE
® CURRENT PERMIT
❑ APPROVED PLANS
❑ HISTORICAL FILE
❑ COMPLIANCE EVALUATION INSPECTION
DOC DATE
202 ► l 2 O c>,
YYYYMMDD

`I 2
ROY COOPER
Govemor
ELIZABETH S BISER
Secretary
BRIAN WRENN
Director
December 9, 2021
Darske, LLC
Attn Gerard Skehan, Manager/Member
42 Yaupon Way
Oak Island, NC 28465
NORTH CAROLINA
Environmental Quahty
Subject Permit Renewal
Post -Construction Stormwater Management Permit No SW8 070808
4586 Long Beach Road
Brunswick County
Dear Mr Skehan
Effective August 1, 2013 the Post -Construction Stormwater Management Program has been transferred from the
Division of Water Quality ("DWQ") to the Division of Energy, Mineral and Land Resources ("DEMLR') All
previous references to DWQ will remain in older permits issued prior to August 1, 2013 until they are modified
Please note that this permit will now reference DEMLR as the Division responsible for enforcement of the permit
On August 5, 2009, the Governor signed Session Law 2009-406 This law impacted any development approval
issued by the former Division of Water Quality under Article 21 of Chapter 143 of the General Statutes, which
was current and valid at any point between January 1, 2008, and December 31, 2010 The law extended the
effective period of any permit that was set to expire during this time frame to three (3) years from its current
expiration date On August 2, 2010, the Governor signed Session Law 2010-177, which granted an extra year for
a total of four (4) years extension
The Division of Energy Mineral and Land Resources received a complete 8-year Permit Renewal Application for
the subject permit on November 29, 2021 The Division is hereby notifying you that permit SW8070808 has been
renewed, updated, and re -issued on December 9, 2021, as attached Please be aware that the renewal and re -
issuance of this stormwater permit does not imply that the site is currently in compliance
This permit shall be effective until September 7, 2021, which includes all available extensions, and does not
supersede any other agency permit that maybe required The project shall be subject to the conditions and
limitations as specified therein This permit does not impose new or increased stormwater control requirements, it
clarifies the rules and requirements of this program to provide you with a better understanding of your obligations
under this permit Failure to comply with these requirements will result in future compliance problems Please
note that this permit is not transferable except after notice to and approval by the Division
If any parts, requirements, or limitations contained in this permit are unacceptable, you have the fight to request
an adludicatory hearing by filing a written petition with the Office of Administrative Hearings (OAH) The
written petition must conform to Chapter 150B of the North Carolina General Statutes and must be filed with the
OAH within thirty (30) days of receipt of this permit You should contact the OAH with all questions regarding
the filing fee (if a filing fee is required) and/or the details of the filing process at 6714 Mail Service Center,
Raleigh, NC 27699-6714, or via telephone at 919-431-3000, or visit their website at www NCOAH com Unless
such demands are made this permit shall be final and bindmg
If you have any questions concerning this permit, please contact Ashley Smith in the Wilmington Regional
Office, at [phone] or ashleym smith@ncdenr gov
Sincerely,
A; Brian Wrenn, Director
Division of Energy, Mineral and Land Resources
'�
North Carolina Department of Enatronmental Quality 1 Division of Energy Mineral and Land Resources
e
Wilmington Regional Office 1127 Cardinal Drive Extension I Wilmington North Carolina 28405
noain unou�� r
owwe ww\ p
9107967215

State Stormwater Permit No SW8 070808
Page 2 of 2
Enclosures
DES/ams
cc
Attachment C — Permitting History
Renewal Application Documents
%Stormwater\Permits & Projects\2007\070808 HD\2021 12 permit 070808
Wilmington Regional Office Stormwater File
XF — North Carolina Department of Environmental Quality I Division of Energy Mineral and Land Resources
Wilmington Regional Office 1 127 Cardinal Drive Extension I Wilmington North Carolina 28405
a�a�®\ 91079672i5

Post -Construction Stormwater Management
Permit No SW8 070808
Ua2[*]:iIon [N_l:0141:/_1
DEPARTMENT OF ENVIRONMENTAL QUALITY
DIVISION OF ENERGY, MINERAL AND LAND RESOURCES
POST -CONSTRUCTION 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
Darske, LLC
4586 Long Beach Road
4586 Long Beach Road, Oak Island, Brunswick County
FOR THE
construction, operation and maintenance of an underground infiltration trench system in compliance
with the provisions of 15A NCAC 2H 1000 (hereafter referred to as the "stormwater rules') and as
outlined in the application, approved stormwater management plans, supplement, calculations,
operation and maintenance agreement, recorded documents, specifications, and other supporting
data (the "approved plans and specifications") as attached and/or on file with and approved by the
Division of Energy, Mineral and Land Resources (the "Division" or "DEMLR") The project shall be
constructed, operated and maintained in accordance with these approved plans and specifications
The approved plans and specifications are incorporated by reference and are enforceable part of this
permit
This permit shall be effective from the date of issuance until September 7, 2029 and shall be subject
to the following specified conditions and limitations The permit issued shall continue in force and
effect until the permittee files a request with the Division for a permit modification, transfer, renewal, or
rescission, however, these actions do not stay any condition 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 for cause as allowed by the laws, rules, and regulations contained in Title 15A
NCAC 2H 1000 and NCGS 143-215 1 et al
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 16 on page 2 of this permit The stormwater control has been designed to
handle the runoff from 35,559 square feet of impervious area (Systems A & B = 10,019 sf each
& System C = 16,988 sf)
The tract will be limited to the amount of built -upon area indicated on page 2 of this permit, and
per approved plans
Page 1 of 5

Post -Construction Stormwater Management
Permit No SW8 070808
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
6 The following design criteria have been provided in the infiltration trenches and must be
maintained at design conditions
Infiltration Trench
System #A
System #B
System #C
a Drainage Area, acres
023
023
039
Onsite, ftZ
10,019
10,019
16,988
Offsite, ftZ
None
None
None
b Total Impervious Surfaces, ftZ
9,619
9,527
16,413
c Design Storm, inches
1 0
1 0
1 0
d Trench Dimensions, L x W x
H, ft
57 x 33 x 1 5
57 x 33 x 1 5
112 x 18 x 1 5
e Perforated Pipe
Diameter/Length
Vo/62T L
1'0/627' L
1'�/672' L
f Bottom Elevation, FMSL
987
987
987
Bypass Weir Elevation, FMSL
1002
1002
1002
h Permitted Storage Volume, ft3
1424
1424
1526
i Type of Soil
Yau on Silty Cla
Expected Infiltration Rate, in/hr
37
42
37
k Seasonal High Water Table,
FMSL
967
956
967
I Time to Draw Down, hours
1 3
1 2
2 1
m Receiving Stream/River Basin
Calf Gully
Creek/Cape Fear River
n Stream Index Number
18-88-9-3-3-1
o Classification of Water Body
SC, Sw, HQW
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 the design condition 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
Records of maintenance activities must be kept and made available upon request to
authorized personnel of DEMLR The records will indicate the date, activity, name of person
performing the work and what actions were taken
Page 2 of 5

Post -Construction Stormwater Management
Permit No SW8 070808
5 The facilities shall be constructed, operated and maintained in accordance with the provisions
of this permit, the approved plans and specifications, and the supporting documents attached
to this permit and on file with the Division
6 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
7 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
8 Access to the stormwater facilities shall be maintained via appropriate easements at all times
9 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
10 No person or entity, including the permittee, shall alter any component shown in the approved
plans and specifications Prior to the construction of any modification to the approved plans,
the permittee shall submit to the Director, and shall have received approval for modified plans,
specifications, and calculations including, but not limited to, those listed below For changes to
the protect or SCM that impact the certifications, a new or updated certification(s), as
applicable, will be required and a copy must be submitted to the appropriate DEQ regional
office upon completion of the modification
a Any modification to the approved plans and specifications, regardless of size including
the SCM(s), BUA, details, etc
b Redesign or addition to the approved amount of BUA or to the drainage area
c Further development, subdivision, acquisition, lease or sale of any, all or part of the
project and/or property area as reported in the approved plans and specifications
d Altering, modifying, removing, relocating, redirecting, regrading, or resizing of any
component of the approved SCM(s), the stormwater collection system and/or
vegetative conveyance shown on the approved plan
e The construction of any allocated future BUA
f The construction of any permeable pavement, #57 stone area, public trails, or
landscaping material to be considered a permeable surface that were not included in
the approved plans and specifications
g Other modifications as determined by the Director
III GENERAL CONDITIONS
1 CORRECTIVE ACTIONS REQUIRED If the facilities fail to perform satisfactorily, the
permittee shall take immediate corrective actions This includes actions required by this
Division and the stormwater rules such as the construction of additional or replacement on -site
stormwater systems These additional or replacement measures shall receive a permit from
the Division prior to construction
2 PERMIT RENEWAL A permit renewal request must be submitted at least 180 days prior to
the expiration date of this permit The renewal request must include the appropriate
application, documentation and the processing fee as outlined in Title 15A NCAC
02H 1045(3)
3 CHANGES TO THE PROJECT NAME, PERMITTEE NAME OR CONTACT INFORMATION
The permittee shall submit a completed Permit Information Update Application Form to the
Division within 30 days to making any one of these changes
Page 3 of 5

Post -Construction Stormwater Management
Permit No SW8 070808
TRANSFER This permit is not transferable to any person or entity except after notice to and
approval by the Director Neither the sale of the protect and/or property, in whole or in part, nor
the conveyance of common area to a third party constitutes an approved transfer of the permit
TRANSFER REQUEST The transfer request must include the appropriate application,
documentation and the processing fee as outlined in 15A NCAC 02H 1045(2) This
request must be submitted within 90 days of the permit holder meeting one or more of
the following
i A natural person who is deceased,
n A partnership, limited liability corporation, corporation, or any other business
association that has been dissolved,
ni A person or entity who has been lawfully and finally divested of title to the
property on which the permitted activity is occurring or will occur through
foreclosure, bankruptcy, or other legal proceeding
ry A person or entity who has sold the property, in whole or in part, on which the
permitted activity is occurring or will occur
TRANSFER INSPECTION Prior to transfer of the permit, a file review and site
inspection will be conducted by Division personnel to ensure the permit conditions
have been met and that the project and the on -site stormwater system complies with
the permit conditions Records of maintenance activities performed to date may be
requested Projects not in compliance with the permit will not be transferred until all
permit and/or general statute conditions are met
5 COMPLIANCE The permittee is responsible for compliance with the terms and conditions of
this permit until the Division approves the transfer request
APPROVED PLANS AND SPECIFICATIONS A copy of this permit, approved plans,
application, supplement, operation and maintenance agreement, all applicable
recorded documents, and specifications shall be maintained on file by the permittee at
all times
DIVISION ACCESS The permittee grants Division Staff permission to enter the
property during normal business hours to inspect all components of the permitted
protect
c ENFORCEMENT Any individual or entity found to be in noncompliance with the
provisions of a stormwater management permit or the requirements of the stormwater
rules is subject to enforcement procedures as set forth in NCGS 143 Article 21
d ANNUAL CERTIFICATION The permittee shall electronically submit to the Division an
annual certification completed by either the permittee or their designee confirming the
protects conformance with permit conditions
e OBTAINING COMPLIANCE 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 modified plans and certification in writing to the Director that the
changes have been made
f OTHER PERMITS The issuance of this permit does not preclude the permittee from
complying with and obtaining any other permits or approvals that are required for this
development to take place, as required by any statutes, rules, regulations, or
ordinances, which may be imposed by any other Local, State or Federal government
agency having jurisdiction Any activities undertaken at this site that cause a water
quality violation or undertaken prior to receipt of the necessary permits or approvals to
do so are considered violations of NCGS 143-215 1, and subject to enforcement
procedures pursuant to NCGS 143-215 6
Page 4 of 5

Post -Construction Stormwater Management
Permit No SW8 070808
Permit renewed, updated and reissued this the 9th day of December 2021
NORTH CAROLINA ENVIRONMENTAL MANAGEMENT COMMISSION
s; nan Wrenn, Director
Division of Energy, Mineral and Land Resources
By Authority of the Environmental Management Commission
Page 5 of 5

Attachment C - Permitting History
4586 Long Beach Road
Permit No SW8070808
Approval
Date
permit
Action
BlMS
Version
Description of the Changes
9/6/2007
Original
Approval
10
12/9/2021
Renewal
20
Expires September 7, 2029

DEMLR USE ONLY
Date Rec ived
Fee Paid
Permit Number
t)` v e
NC DEQ Division of Energy, Mineral and Land Resources
STATE STORMWATER.
PERMIT RENEWAL APPLICATION FORM
In accordance with 15A NCAC 2H 1045(3), the current permit holder shall renew their high density permit 180 days
poor to its expiration Renewed permits are valid for a period of 8 years per Session Law 2011-398 (SB 781)
Section 60 (c) This application form is for permit renewals only
A PROJECT INFORMATION
1 State Stormwater Permit Number
2 Project name
3 Project street address
city OAk j 5
County
4 What, if any, changes have been made to the project as permitted?
ZIP
If the project has changed from the original approved plans, please complete SWU-101 for a Ma/or
Modification or Minor Modification Application form available at httos //deg nc qov/abouUdwisions/energy-
mineral-land-resources/energy-mineral-land-rules/stormwater-program/post-construction
B PERMITTEE INFORMATION
If changes to the permittee or project name have been made, please complete either the Permit Update form
or the Permit Transfer form available at https //deg nc qov/abouUdwisions/energv-mineral-land-
resources/energv-mineral-land-rules/stormwater-program/post-construction State Stormwater Permits do not
automatically transfer with the sale of the property
1 Current Permit Holder's Company Name/Organization Qaoc 0— C
2 Signing Official's Name
3 Signing Official's Title
4 Mailing Address V
City 6A IK �s
5 Street Address
City
6 Phone (910
Email
State b) C- ZIP Z19��
ZIP
at e Sker~0.r l to-1T O-L0Y01 y0-�K,i 'e"k
ECEIVV
prrllr �� a ter, ,
NOV 19 202,
BYE �1
Stormwater Permit Renewal Form Page 1 of 3 May 11, 2018

C SUBMITTAL REQUIREMENTS
Submit the application package to the appropriate DEMLR Regional Office (Coastal, SA Waters) or DEMLR
Central Office (Urbanizing Areas Ph 2, USMP, Non -Coastal HQW/ORW) Only applications packages that
include all required items listed below will be accepted and reviewed
item below to indicate that the required information is provided in the application package
#it,each
1
A permit application processing fee of $505 00 payable to NCDEQ
2
One original signed hard copy and one electronic copy of this completed form The signing official
named on this application to represent the current permittee must meet one of the following
a Corporation — a principle executive officer of at least the level of vice-president,
bJ Limited Liability Company (LLC) — a manager or company official as those terms are defined
n G S 57D "North Carolina Limited Liability Company Act,"
c Public Entity — a principal executive officer, ranking official, or other duly authorized employee,
d Partnership or limited partnership — the general partner,
e Sole proprietor, or
f Letter of authorization signed by one of the signatories noted in a — e above authorizing the
signature of another entity
3
One hard copy and one electronic copy of recorded documents required by the original permit that
have not yet been received by DEMLR, including deed restrictions, protective covenants,
condominium/planned community declaration and easements If the project has been built, include
documentation that the maximum BUA per lot or maximum total BUA has not been exceeded If
the project has not been built, include a signed agreement that the final recorded deed restrictions
and protective covenants will be submitted at a later date
4
O&M Agreements, Please select one
IYCI=I I have a copy of the current recorded O&M Agreement for all SCMs, and I will continue to
keep this on file with the permit, or
❑ I do not have a copy of the current recorded O&M Agreement for all SCMs and am
requesting a copy be sent tome I agree to keep this on file with the permit
5
Designer Certifications, Please select one
® A copy of the certification(s) confirming that the project was built in accordance with the
approved plans have been previously provided to the Division, or
❑ A copy of the certification(s) confirming that the project was built in accordance with the
approved plans are enclosed, or
❑ The project has not yet been built
6 [IF APPLICABLE] If the project has been built, one original hard copy and one electronic copy of a
signed, sealed, and dated letter from a licensed professional stating that the SCMs have been
inspected, and that they have been built and maintained in accordance with the permC(LLC)
t
xou f V& IT, [IF APPLICABLE] When the permittee is a corporation or a limited liability corporatioProvide one hard copy and one electronic copy of documentation from the NC Secre,
or other official documentation, which supports the titles and positions held by the persons listed In
71F Section C 2 per 15A NCAC 2H 1043(3)(b)
httos //www sosnc gov/online services/search/by title/ Business Registration
Stormwater Permit Renewal Application Form Page 2 of 3 May 11, 2018

D PERMITTEE'S CERTIFICATION
C�
I, CSC-,P[yPJI J UIIGFF 9 w , the person legally responsible for the permit, certify that I have
a copy of the Permit and O&M Agreement on site (or I will obtain a copy and it will be kept on site), that I am
responsible for the performance of the maintenance procedures, and the site has been and will be maintained
according to the O&M Agreement and approved plans I agree to notify DEMLR of any problems with the SCMs
or built -upon area and to submit the ppper,,fjorms to modify or transfer the permit prior to any changes to the
project, SCMs ow ersh II inf rmat roved on this permit renewal application is, to the best of my
knowledge, orrect d mpl
Signature -Date i/ Z�
TION
County of
that VGA �f oKtlLt.
this the 23 day of
Witness my hand and official seal,
Notary Public
frN11�y+�jp., North Carolina
M um�fisalon Expires July 10, 2023
Notary Signature v
My commission expires
J
a Notary Public for the State of
do hereby certify
personally appeared before me
2074, and acknowledge the due
MOV 2 9 ?0�'
Stormwater Permit Renewal Application Form Page 3 of 3 May 11 2018

f t-gV7- i ce �/ i^c-v y� t -2
e111107-- 4e(j Permit NocYWP 070696)9
/ (to be provided by DWQ)
State of North Carolina
Department of Environment and Natural Resources
Division of Water Quality
STORMWATER MANAGEMENT PERMIT APPLICATION FORM
UNDERGROUND INFILTRATION TRENCH SUPPLEMENT
This form may be photocopied for use as an original
DWQ Stormwater Management Plan Review
A complete stormwater management plan submittal includes a stormwater management permit application, an
underground infiltration trench supplement for each system, design calculations, and plans and specifications
showing all stormwater conveyances and system details
I. PROJECT INFORMATION
Project Name 4586 Lone Beach Road
Contact Person Brad Sedgwick, PE Phone Number [phone]
For projects with multiple infiltration systems, a supplement form must be completed for each system This
worksheet applies to Trench A in Drainage Area A
(from plans) (from Form SWU-101)
II DESIGN INFORMATION (attach supporting calculations/documentation):
Soils Report Summary (based upon an actual field investigation and soil bormgv)
Soil Type Yaupon silty clay
Infiltration Rate
37
SHWT Elevation
967
Trench Design Parameters
Design Volume
7605
Design Storm
1
Drawdown Time
16
Perforated Pipe Size
12
Perforated Pipe Length
627
No Observation Wells
2
Stone Type (if used)
#57
Stone Void Ratio
40%
Trench Elevations (in feet mean sea level)
Bottom Elevation
987
Storage/Overflow Elevation
1002
in/hr
fmsl (Seasonal High Water Table elevation)
cf
inch event (15 inch event for SA waters, I inch event for others)
days
inch diameter
ft
(may be required on a case -by -case basis)
foist
fmsl
Form SWU-107 Rev 3 99 Page 1 of 4

01tiZ10-7-,e`'1,tcv 4 z 8
Trench Dimensions
Height 15 ft Length 57 ft
Width 33 ft Volume Provided 1424 cu It
III. 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, November 1995) and Administrative Code Section 15
A NCAC 2H 1008
Initial in the space provided to indicate that 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 Attach Justification if a requirement has not been met
Applicants Initials
a
nn� b
c
�d
e
f
Dom`
9
h
R k
System is located 50 feet from class SA waters and 30 feet from other surface waters
System is located at least 100 feet from water supply wells
Bottom of system is at least 2 feet above the seasonal high water table
Bottom of the system is 3 feet above any bedrock or impervious soil horizon
Off-line system, runoff in excess of the design volume bypasses the system (bypass detail
provided)
System is designed to draw down the design storage volume to the proposed bottom
elevation under seasonal high water conditions within five days based upon infiltration
through the bottom only (a hydrogeologic evaluation may be required)
Sods have a minimum hydraulic conductivity of 0 52 inches per hour
System is not sited on or in fill material or DWQ approval has been obtained
Plans ensure that the installed system will meet design specifications (constructed or
restored) upon initial operation once the project is complete and the entire drainage area is
stabilized
System is sized to take into account the runoff at the ultimate built -out potential from all
surfaces draining to the system, including any off -site drainage
System is located in a recorded drainage easement for the purposes of operation and
maintenance and has recorded access easements to the nearest public right-of-way
System captures and infiltrates the runoff from the first 1 0-inch of rainfall (1 5 inch event
for areas draining to SA waters)
Drainage area for the device is less than 5 acres
A pretreatment device (filter strip, grassed swale, sediment trap, etc ) is provided
Trench bottom is covered with a layer of clean sand to an average depth of 4 inches
Sides of the infiltration trench are lined with geotextile fabric
Rock used is free of fines (washed stone) and has a large void ratio
Side to bottom area ratio is less than 4 1
Observation well(s) are provided (case -by -case basis)
Form SW U-107 Rev 3 99
Page 2 of 4

Vegetated filter is provided for overflow (50 feet for SA waters, 30 feet for other waters)
and detail is shown on plans
u A benchmark for checking sediment accumulation is provided
IV. UNDERGROUND INFILTRATION TRENCH OPERATION AND MAINTENANCE AGREEMENT
1 After every runoff producing rainfall event and at least monthly inspect the bypass/overflow structure for
blockage and deterioration and the infiltration system for erosion, trash accumulation, grass cover, and general
condition
2 Repair eroded areas immediately, re -seed as necessary to maintain adequate vegetative cover, mow vegetative
cover to maintain a maximum height of six inches, and remove trash and blockages as needed to maintain system
performance
3 Remove accumulated sediment annually or when depth is reduced to 75% of the original design depth Restore
depth to original design depth without over -excavating Over -excavating may cause the required water table
separation to be reduced and may compromise the ability of the system to perform as designed
4 The water level in any monitoring wells will be recorded after a 1-inch rainfall event and at least once a month
Chronic high water table elevations (within 1 foot of the bottom of the system for a period of three months) shall
be reported to DWQ immediately
5 If DWQ determines that the system is failing, the system will immediately be repaired or replaced to original
design specifications If the system cannot be repaired to perform its design function, other stormwater control
devices as allowed by NCAC 2H 1000 must be designed, approved and constructed
6 Remove accumulated sediment from the infiltration system annually or when depth in the unit is reduced to
75% of the original design depth The system shall be restored to the original design depth without over
excavating Over -excavating may cause the required water table separation to be reduced and may
compromise the ability of the system to perform as designed Removed sediment shall be disposed of in an
appropriate manner and shall not be handled m a manner that will adversely impact water quality (i e
stockpilmg near a stormwater treatment device or stream, etc )
A benchmark shall be established in the infiltration system The benchmark will document the original
design depth so that accurate sediment accumulation readings can be taken The measuring device used to
determine the depth at the benchmark shall be such that it will give an accurate depth reading and not
readily penetrate into accumulated sediments
When the depth at the benchmark reads 2.5" , the accumulated sediment shall be removed
from the system.
Form SWU-107 Rev 3 99 Page 3 of 4

r-
I acknowledge and agree by my signature below that I am responsible for maintaimng the stormwater collection
system in accordance with the six 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 parry
Pnnt Name and Title Gerard J Skehan, Manager
Address 42 Yaupon Way, Oak Island NC 28465
Phone 910 - 84 Date
n
Note The legally responsible party should not be a homeowners association unless more than 50% ojthe lots have been sold and a
resident ojthe subdivision has been named the president
xgg
I, C / le6 a Notary Public for the State of 14eA1—<,,(IJ1e L , County of
&AI&60)CICL , do hereby c rtify that _G�,�y-r2d �J 25-&h7y personally appeared before me this
,'� day of , and acknowledge the due execution of the forgoing infiltration
basin maintenance requirements Witnea my hand and official seal,
```�tN1llrtpt4 U
\G E A4
# i ° NoTA9.c
_ C •. Au y _
2 U� 9
Atp'•s?Sd , i �;C My commission expires O}
�L
Form SWU-107 Rev 3 99
Page 4 of 4

W5f /o7- A_ /J �e f Permit No
ICR.G o�t � /p (to be provided 6y DWQ)
Y State of North Carolina
Department of Environment and Natural Resources
Division of Water Quality
STORMWATER MANAGEMENT PERMIT APPLICATION FORM
UNDERGROUND INFILTRATION TRENCH SUPPLEMENT
Thts form may be photocopted for use as an original
DWO Stormwater Management Plan Review
A complete stormwater management plan submittal includes a stormwater management permit application, an
underground infiltration trench supplement for each system, design calculations, and plans and specifications
showing all stormwater conveyances and system details
I. PROJECT INFORMATION
Project Name 4586 Long Beach Road
Contact Person Brad Sedgwick, PE Phone Number [phone]
For projects with multiple infiltration systems, a supplement form must be completed for each system This
worksheet applies to Trench B in Drainage Area B
(from plans) (from Form SWU-101)
II DESIGN INFORMATION (attach supporting calculations/documentation):
Soils Report Summary (based upon an actual field investigation and sod borings)
Soil Type Yaupon silty clay
Infiltration Rate
42
SHWT Elevation
956
Trench Design Parameters
Design Volume
7605
Design Storm
1
Drawdown Time
09
Perforated Pipe Size
12
Perforated Pipe Length
627
No Observation Wells
2
Stone Type (if used)
#57
Stone Void Ratio
40%
Trench Elevations (in feet mean sea level)
Bottom Elevation
987
Storage/Overflow Elevation
1002
in/hr
fmsl (Seasonal High Water Table elevation)
cf
inch event (15 inch event for SA waters, I inch event for others)
days
inch diameter
It
(may be required on a case -by -case basis)
fmsl
fmsl
Form SWU-107 Rev 3 99 Page 1 of 4

6/740-7— �1s�����, /'17- Sw 8 0-70 &OS
8 /3 t /0 7 - /sec 4 r PV /1 ?-
Trench Dimensions /
Height 15 ft Length 57 ft
Width 33 ft Volume Provided 1424 cu ft
III. 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, November 1995) and Administrative Code Section 15
A NCAC 2H 1008
Initial in the space provided to indicate that 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 Attach justification if a requirement has not been met
a System is located 50 feet from class SA waters and 30 feet from other surface waters
b System is located at least 100 feet from water supply wells
c Bottom of system is at least 2 feet above the seasonal high water table
d Bottom of the system is 3 feet above any bedrock or impervious soil horizon
�Dn e Off-line system, runoff in excess of the design volume bypasses the system (bypass detail
N� provided)
f System is designed to draw down the design storage volume to the proposed bottom
®� elevation under seasonal high water conditions within five days based upon infiltration
through the bottom only (a hydrogeologic evaluation may be required)
g Soils have a minimum hydraulic conductivity of 0 52 inches per hour
h System is not sited on or in fill material or DWQ approval has been obtained
1 Plans ensure that the installed system will meet design specifications (constructed or
restored) upon initial operation once the project is complete and the entire drainage area is
stabilized
j System is sized to take into account the runoff at the ultimate built -out potential from all
surfaces draining to the system, including any off -site drainage
k System is located in a recorded drainage easement for the purposes of operation and
maintenance and has recorded access easements to the nearest public right-of-way
System captures and infiltrates the runoff from the first 1 0-inch of rainfall (1 5 inch event
for areas draining to SA waters)
in Drainage area for the device is less than 5 acres
n A pretreatment device (filter strip, grassed swale, sediment trap, etc ) is provided
o Trench bottom is covered with a layer of clean sand to an average depth of 4 inches
p Sides of the infiltration trench are lined with geotextile fabric
q Rock used is free of fines (washed stone) and has a large void ratio
Side to bottom area ratio is less than 4 1
Observation well(s) are provided (case -by -case basis)
Form SW U-107 Rev 3 99
Page 2 of 4

Vegetated filter is provided for overflow (50 feet for SA waters, 30 feet for other waters)
and detail is shown on plans
A benchmark for checking sediment accumulation is provided
W. UNDERGROUND INFILTRATION TRENCH OPERATION AND MAINTENANCE AGREEMENT
I After every runoff producing rainfall event and at least monthly inspect the bypass/overflow structure for
blockage and deterioration and the infiltration system for erosion, trash accumulation, grass cover, and general
condition
2 Repair eroded areas immediately, re -seed as necessary to maintain adequate vegetative cover, mow vegetative
cover to maintain a maximum height of six inches, and remove trash and blockages as needed to maintain system
performance
3 Remove accumulated sediment annually or when depth is reduced to 75% of the original design depth. Restore
depth to original design depth without over -excavating Over -excavating may cause the required water table
separation to he reduced and may compromise the ability of the system to perform as designed
4 The water level in any monitoring wells will be recorded after a I -inch rainfall event and at least once a month
Chronic high water table elevations (within I foot of the bottom of the system for a period of three months) shall
be reported to DWQ immediately
5 If DWQ determines that the system is fading, the system will immediately be repaired or replaced to original
design specifications If the system cannot be repaired to perform its design function, other stormwater control
devices as allowed by NCAC 2H 1000 must be designed, approved and constructed
6 Remove accumulated sediment from the infiltration system annually or when depth in the umt is reduced to
75% of the ongmal design depth The system shall be restored to the onginal design depth without over
excavating Over -excavating may cause the required water table separation to be reduced and may
compromise the ability of the system to perform as designed Removed sediment shall be disposed of in an
appropriate manner and shall not be handled in a manner that will adversely impact water quality (i e
stockpiling near a stormwater treatment device or stream, etc )
A benchmark shall be established in the mfiltration system The benchmark will document the onginal
design depth so that accurate sediment accumulation readings can be taken The measuring device used to
determine the depth at the benchmark shall be such that it will give an accurate depth reading and not
readily penetrate into accumulated sediments
When the depth at the benchmark reads 2.5" , the accumulated sediment shall be removed
from the system.
Form SWU-107 Rev 3 99 Page 3 of 4

I acknowledge and agree by my signature below that I am responsible for maintaining the stormwater collection
system in accordance with the six 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 and Title Gerard J Skehan, Manager
Address 42 Yaupon Way, Oak Island, NC 28465
Phone
Signature
Date S I2 16 —)
Note The legally responsible party shou'V'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
d /t / 7Y-.Pj , a Notary Public for the State of /1/ County of
/l! �✓s , i�� do hereby certify that L H `/ 4S//e It personally appeared before me this
_ . K_ day of _a00 2 , and acknowledge the due execution of the forgoing infiltration
basin maintenance requirements W itn s my hand and official seal,
r l do Je.d
ii
My commission expires LZ D
Form SWU-107 Rev 3 99 Page 4 of 4

�3,8
o 1�d7 — c� �J /./ Z Permit N8 o 3-tyS 076 "
I (to be provided by DWQ)
State of North Carolina
Department of Environment and Natural Resources
Division of Water Quality
STORMWATER MANAGEMENT PERMIT APPLICATION FORM
UNDERGROUND INFILTRATION TRENCH SUPPLEMENT
This form may be photocopied for use as an original
DWO Stormwater Management Plan Review
A complete stormwater management plan submittal includes a stormwater management permit application, an
underground infiltration trench supplement for each system, design calculations, and plans and specifications
showing all stormwater conveyances and system details
I. PROJECT INFORMATION
Project Name 4586 Long Beach Road
Contact Person Brad Sedgwick, PE Phone Number [phone]
For projects with multiple infiltration systems, a supplement form must be completed for each system This
worksheet applies to Trench C in Drainage Area C
(from plans) _ (from Form SWU-101)
H. DESIGN INFORMATION (attach supporting calculations/documentation)
Soils Report Summary (based upon an actual field investigation and soil borings)
Soil Type
Yaupon silty clay
Infiltration Rate
3 7
SHWT Elevation
967
Trench Design Parameters
Design Volume
13122
Design Storm
1
Drawdown Time
10
Perforated Pipe Size
12
Perforated Pipe Length
672
No Observation Wells
3
Stone Type (if used)
#57
Stone Void Ratio
40%
Trench Elevations (in feet mean sea level)
Bottom Elevation
987
Storage/Overflow Elevation
1002
m/hr
fmsl (Seasonal High Water Table elevation)
cf
inch event (1 5 inch event for SA waters, I inch event for others)
days
inch diameter
ft
(may be required on a case -by -case basis)
fmsl
fmsl
Form SWU-107 Rev 3 99 Page 1 of 4

9{zZ%7- &1W /0,_�, 2
to-%- I& lc� -2—
Trench Dimensions
Height 15 ft Length 112 ft
Width 18 ft Volume Provided 15263 cu ft
III. 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, November 1995) and Administrative Code Section 15
A NCAC 2H 1008
Initial in the space provided to indicate that 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 Attach justification if a requirement has not been met
Initials
a System is located 50 feet from class SA waters and 30 feet from other surface waters
b System is located at least 100 feet from water supply wells
c Bottom of system is at least 2 feet above the seasonal high water table
d Bottom of the system is 3 feet above any bedrock or impervious soil horizon
e Off-line system, runoff in excess of the design volume bypasses the system (bypass detail
�M
\�
provided)
f
System is designed to draw down the design storage volume to the proposed bott
om
elevation under seasonal high water conditions within five days based upon infiltration
through the bottom only (a hydrogeologic evaluation may be required)
g Soils have a minimum hydraulic conductivity of 0 52 inches per hour
h System is not sited on or infill material or DWQ approval has been obtained
i Plans ensure that the installed system will meet design specifications (constructed or
T _ p restored) upon initial operation once the project is complete and the entire drainage area is
stabilized
j System is sized to take into account the runoff at the ultimate built -out potential from all
surfaces draining to the system, including any off -site drainage
k System is located ina recorded drainage easement for the purposes of operation and
maintenance and has recorded access easements to the nearest public right-of-way
System captures and infiltrates the runoff from the first 1 0-mch of rainfall (1 5 inch event
for areas draining to SA waters)
i Drainage area for the device is less than 5 acres
A pretreatment device (filter strip, grassed swale, sediment trap, etc ) is provided
Trench bottom is covered with a layer of clean sand to an average depth of 4 inches
Sides of the infiltration trench are lined with geotextile fabric
Rock used is free of fines (washed stone) and has a large void ratio
Side to bottom area ratio is less than 4 1
Observation well(s) are provided (case -by -case basis)
Form SWU-107 Rev 3 99
Page 2 of 4

Vegetated filter is provided for overflow (50 feet for SA waters, 30 feet for other waters)
and detail is shown on plans
A benchmark for checking sediment accumulation is provided
IV. UNDERGROUND INFILTRATION TRENCH OPERATION AND MAINTENANCE AGREEMENT
After every runoff producing rainfall event and at least monthly inspect the bypass/overflow structure for
blockage and deterioration and the infiltration system for erosion, trash accumulation, grass cover, and general
condition
2 Repair eroded areas immediately, re -seed as necessary to maintain adequate vegetative cover, mow vegetative
cover to maintain a maximum height of six inches, and remove trash and blockages as needed to maintain system
performance
3 Remove accumulated sediment annually or when depth is reduced to 75% of the original design depth Restore
depth to original design depth without over -excavating Over -excavating may cause the required water table
separation to be reduced and may compromise the ability of the system to perform as designed
The water level in any monitoring wells will be recorded after a 1-inch rainfall event and at least once a month
Chronic high water table elevations (within 1 foot of the bottom of the system for a period of three months) shall
be reported to DWQ immediately
5 If DWQ determines that the system is failing, the system will immediately be repaired or replaced to original
design specifications If the system cannot be repaired to perform its design function, other stormwater control
devices as allowed by NCAC 2H 1000 must be designed, approved and constructed
Remove accumulated sediment from the infiltration system annually or when depth in the unit is reduced to
75% of the original design depth The system shall be restored to the original design depth without over
excavating. Over -excavating may cause the required water table separation to be reduced and may
compromise the ability of the system to perform as designed Removed sediment shall be disposed of in an
appropriate manner and shall not be handled in a manner that will adversely impact water quality (i e
stockpiling near a stormwater treatment device or stream, etc )
A benchmark shall be established in the infiltration system The benchmark will document the original
design depth so that accurate sediment accumulation readings can be taken The measuring device used to
determine the depth at the benchmark shall be such that it will give an accurate depth reading and not
readily penetrate into accumulated sediments
When the depth at the benchmark reads 2.5" , the accumulated sediment shall be removed
from the system.
Form SWU-107 Rev 3 99 Page 3 of 4

I acknowledge and agree by my signature below that I am responsible for maintaining the stormwater collection
system in accordance with the six 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 and Title Gerard J Skehan, Manager
Address 42 Yaunon Way, Oak Island, NC 28465
Phone
Signature
Date C Z a
Note The legally responsible party should not be a homeowners association unless more than 50% of the lots have been sold and a
resident of the subdivision has been named the president
1, /C a Notary/Public for the
/St/oe of/'V- /li County of
do hereby ``emfy that h '�qi2,/� V �/1 fit/ personally appeared before me this
day of, and acknowledge the due execution of the forgoing mfiltrauon
basin maintenance requirements W itn s my hand and official seal,
��4
``�itlii�Uprrr�
`�x� AGE TF ins
MssioIV
My commission expires _
Form SWU-107 Rev 3 99 Page 4 of 4

CONSULTING, PA
7332 Cotesworth Dnve
Wilmington, NC 28405
[phone] Fax [phone]
PLANNING - ENGINEERING - CONSTRUCTION MANAGEMENT
February 12, 2008
Mr Ed Beck
NCDENR-DWQ
127 Cardinal Drive Extension
Wilmington, NC 28405-3845
Stormwater Project Number SWS 070808
Project Name 4586 Long Beach Road
Oak Island, NC
Designer's Certification
I, Bradford Sedgwick, PE, as a duly registered Professional Engineer In the State of North
Carolina, having been authorized to observe (periodically) the construction of the project,
4586 Long Beach Road (Project)
for Mr Gerald Skehan, Darske, LLC (Project Contractor and 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 Two of this is included in the certification
Noted deviations from approved plans and specifications
None
Signatur *1—
Registration Number_26378
Date 2/1
Attachment Checklist
Q�N
REC e.TVID
FEI7 ;
BY:

3
i

L SEP-11-2007 TUE 12:07 PM NCDENR FAX N0, 9103502004 P. 08
State Stormwater Management Systems
Permit No SW8 070808
Page 2 of 2
Certification Requirements
The drainage area to the system contains approximately the permitted
acreage
The drainage area to the system contains no more than the permitted
amount of built -upon area
All the built -upon area associated with the project Is graded such that the
runoff drains to the system
All roof drains are located such that the runoff is directed into the system
The bypass structure elevabons are per the approved plan
The bypass structure is located per the approved plans
A Trash Rack is provided on the outlet/bypass structure
All slopes are grassed with permanent vegetation
Vegetated slopes are no steeper than 3 1
The inlets are located per the approved plans and do not cause short-
circuiting of the system
The permtted amounts of surface area and/or volume have been
provided
All required design depths are provided
All required parts of the system are provided
The required system dimensions are provided per the approved plans
cc NCDENR-DWQ Regional Office
Delaney Aycock, Brunswick County Building Inspections
Jeff Phillipps, Brunswick County Engineering