SW8050409_CURRENT PERMIT_20220209

STORMWATER DIVISION CODING SHEET
POST -CONSTRUCTION PERMITS
PERMIT NO.
SW8 05040q
DOC TYPE
® CURRENT PERMIT
❑ APPROVED PLANS
❑ HISTORICAL FILE
❑ COMPLIANCE EVALUATION INSPECTION
DOC DATE
202202og
YYYYMMDD

ROY COOPER
Govcnarr --
ELIMETH S.:BISER
r
BRIAN WRENN
bireaOf
February 9, 2022
NORTH CAROLINA
Env&wLquadd Quaat/
River Ventures, LLC
Attn: Christopher Flay, Executive Vice President
929 North Front Street
Wilmington, NC 2-8401
Subject: Permit Renewal
dit-Construction Stormwater Management Permit No. SW8 050409
PPD Corporate Headquarters
New.Hanover County
Dear Mr. Fikry:
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 untilthey are modified.
Please note that this, permit will now reference DEMLR as the Division responsible for enforcement of the permit.
On'August5, 2009, the Governor signed Session Law 2009406: This laW impacted any development'approval
issued by the former Division of Water Quality underAriicle 21 of Chapter 143 of the Geir" 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 fi-ame to three (3) years from its current
expiration date. On Augusb2, 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 February 8, 2022. The Division.is hereby notifying you that permit SW9 50409 has been
renewed, updated, and re -issued on February 9, 2022, as attached. As requested, a copy of the,current operation
and maintenance agreement is also enclosed.. Please be aware that the renewal and re-issuanb_e of this stormwater
permit does not imply that the site is currently in compliance.
This permit shall be effective until July 18, 2027 , which includes all available extensions, and, does not supersede
any other agency permit that may be required.' The project shall be subject to the conditions and limitations as
specified therein: This permit, does not impose new or increased stormwatef control requirements; it clarifies the
rules and requi ements 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 right to request
an adjudicatory 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 ivith.allquestions 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 binding.
If you have any questions concerning this permit, please contact ashley Smith in the Wilmington Regional Office,
at [phone] or [e-mail].
Sincerely,
Clu. W60
5S Brian Wrenn, Director
Division of Energy, Mineral and Land Resources
North Carolina Department of Environmental Quality I Division of Energy, Nneral and Land Resources
r DEEQWilmington Regional Office 1 127 Cardinal Drive Extension I Wilmington. North Carolina 2W5
910.7%.7215

State Stormwa_ ter Permit No. SW8 050469
Page 2 of 2
Enclosures: Attachment AL Designer's Certification Form
Attachment C — Permitting Mkory
Renewal -Application Documents -
Copy of the current operation acid maintenance agreement
DES/ams: \\\Stormwater\Permits & Projects\2005\050409 HD\2022 02 permit 050409
.cc: Wihningtou RegionalbfHce Stormn a er File"
North Carulftia Deparmnent of Environmental Quality I Division of Energy, Mineral and torrid Resources
D- ESQ-1 .Wflraingtan Regional Office 1127 Cardinal Drive Extension I Wilmington, North Carolina 28405
"�� 910.7%.7215

Post -Construction Stormwater Management
Permit No SW8 050409
STATE OF NORTH CAROLINA
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
River Ventures, LLC
PPD Corporate Headquarters
929 N. Front Street, Wilmington, New Hanover County
FOR THE
construction, operation and maintenance of a temporary stormwater impoundment during construction
and three sand filter systems, that replace the initially -permitted 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 July 18, 2027 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
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 2 of this permit The stormwater control of this modification
has been designed to handle the runoff from 197,096 square feet of impervious area,
replacing the previously permitted infiltration trench system for the control of 106,722 square
feet of impervious area.
3. The tract will be limited to the amount of built -upon area indicated on page 2 of this permit, and
per the 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.
Page 1 of 7

Post -Construction Stormwater Management
Permit No. SW8 050409
1. The runoff from all built -upon area within the permitted drainage area of this project must be
directed into the permitted stormwater control system.
2. The following design criteria have been provided in the three sand filters, that replace the
previously permitted Cultec Infiltration
chamber/trench system, and must be maintained at
design conditions:
Sand Filter Number
Design Criteria
1 2 3
a. Drainage Area, acres
1.88 1.85 1.77
Onsite, ft2'
81,716 80,730 77,130
Offsite ft2.
None None None
b. Total bUA, ft2
70,441 61,850 64,805
C. Design Storm, inches:
1" 1" 1"
d. Sand Filter Depth, ft:
2.25 2.15 2.10
e. TSS efficiency:
85% 85% 85%
f. Filter Bottom FMSL:
13.75 735 22.55
g.Filter Area ft2:
680 680 640
h. Sediment Area, ft2:
680 680 640
1. Storage Volume, ft3:
3060 2924 2688
II Top of sand, FMSL:
16.0 9.5 24.65
k. Weir Elevation, FMSL:
17.0 10.5 25.65
1 Grate Elevation, FMSL:
20.0-20.25 11.5-12.5 26.0-28.0
M. Controlling Orifice:
18" 0 18" 0 18"0
n. Number oT Orifices.
1 1 1
o. Receiving Stream/River Basin.
NE Cape Fear R./Cape Fear
P. Stream Index Number:
CPF 18-74-61
q. Classification of Water Body:
SC Sw"
3. The following design criteria have been provided in the temporary stormwater impoundment,
to be operated and maintained during
construction, and must be maintained at design
conditions:
a. Drainage Area,
5.0
acres:
Onsite, ft:
217,500
Offsite, ft2:
None
b. Total Impervious Surfaces, ft2:
217 500
C. Design Storm, inches:
0.61
d. Impoundment Depth feet:
e. Temporary Storage Elevation
2.0
FMSL 11.0
f. Permitted Surface Area @ 11'
elev., ft2: 8 250
q Permitted Storage Volume, ft3:
16500
fi. Controlling Orifice:
1.�5" 0 pipe
I. Receiving Stream/River Basin:
NE Cape Fear R./Cape Fear
m. Stream Index Number:
CPF 18-74-61
n. Classification of Water Body:
"Sc Sw"
ll. SCHEDULE OF COMPLIANCE
112
0
El
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
During construction, erosion shall be kept to a minimum and any eroded areas of the system
will be repaired immediately
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.
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.
Page 2 of 7

Post -Construction Stormwater Management
Permit No. SW8 050409
5 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.
6. 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.
8. Access to the stormwater facilities shall be maintained via appropriate easements at all times.
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 project 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.
Page 3 of 7

Post -Construction Stormwater Management
Permit No. SW8 050409
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.
4. 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 project 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.
a. 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:
1. A natural person who is deceased,
ii. A partnership, limited liability corporation, corporation, or any other business
association that has been dissolved,
iii. 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.
iv. A person or entity who has sold the property, in whole or in part, on which the
permitted activity is occurring or will occur.
b. 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.
COMPLIANCE The permittee is responsible for compliance with the terms and conditions of
this permit until the Division approves the transfer request.
a 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.
b. DIVISION ACCESS. The permittee grants Division Staff permission to enter the
property during normal business hours to inspect all components of the permitted
project.
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
projects 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
Page 4 of 7

Post -Construction Stormwater Management
Permit No. SW8 050409
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.
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.
Permit renewed, updated and reissued this the 9th day of February 2022.
NORTH CAROLINA ENVIRONMENTAL MANAGEMENT COMMISSION
nan vvrenn, Director20
Division of Energy, Mineral and Land Resources
By Authority of the Environmental Management Commission
Page 5 of 7

Post -Construction Stormwater Management
Permit No SW8 050409
PPD Corporate Headquarters
Stormwater Permit No SW8 050409
New Hanover County
Attachment A
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

Post -Construction Stormwater Management
Permit No. SW8 050409
Certification Requirements
1. The drainage area to the system contains approximately the permitted acreage.
2 The drainage area to the system contains no more than the permitted amount of built -
upon area.
3. All the built -upon area associated with the project is graded such that the runoff drains
to the system.
4. All roof drains are located such that the runoff is directed into the system.
5. The bypass structure elevations are per the approved plan.
6. The bypass structure is located per the approved plans.
7. A Trash Rack is provided on the outlet/bypass structure.
8 All slopes are grassed with permanent vegetation.
9. Vegetated slopes are no steeper than 3:1.
10. The inlets are located per the approved plans and do not cause short-circuiting of the
system.
11. The permitted amounts of surface area and/or volume have been provided.
12. All required design depths are provided.
13. All required parts of the system are provided
14. The required system dimensions are provided per the approved plans.
cc. NCDENR-DWQ Regional Office
New Hanover County Building Inspections
Page 7 of 7

Attachment C - Permitting History
PPD Corporate Headquarters
Permit No. SW8 050409
Approval
Date
Permit Action
BIMS
Version
Description of the Changes
4/21/2005
Original
Approval
10
7/18/2005
Modification
1.1
that includes stormwater management of larger
drainage and impervious areas, a temporary
drainage basin during construction, and the
application of 3 sand filters instead of the
previously permitted Cultec infiltration system
for stormwater control.
2/9/2022
Renewal
2.0
Expires July 18, 2027

State Stormwater Permit No. S'w 8 0sc4o)M01)
Applies to System No.
SAND FILTER OPERATION AND MAINTENANCE PLAN
Regular maintenance is essential to the long-term performance and durability of the
sandfilter, as it is with all stormwater BMP's.
1. Depending on the types of activities occurring within the drainage area, most sand
filters will show a decreased capacity for filtration after a few years. At least once a
year, each filter must be inspected after a 1" design storm event to determine if the
filter bed is passing the runoff within 24 hours.
2. If the filter is not passing the runoff completely within 24 hours, the first 2"-3" of
discolored sand must be removed and replaced with new sand. The removed sand
must be dewatered and disposed of properly.
3. At the same time that maintenance is performed on the sand chamber, the sediment
chamber should be pumped and cleaned. The removed sediment should be
dewatered and disposed of properly.
4. At least once every quarter, check that the orifice is clear.
I acknowledge and agree by my signature below that I am responsible for the performance
of the maintenance procedures listed above. I agree to notify DWQ of any problems with
the system and prior to any changes to the system or the responsible party.
Print name
Address
Phone:
Signature
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.
certify that
this the
execution
official seal,
°1N day of
o the foregoing sand
My commission expires
-T® a Notary Public for the State of
County of do hereby
ilk Xv. personally appeared before me
v F44 0S and acknowledge the due
filter maintenance requirements. Witness my hand and
SEAL

' DEMLR USE ONLY
Date Received Fee Paid
r
Permit Number
2"D scaz 0003°I
Osb
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
prior 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: SW8 050409
2 Project name: PPD Corporate Headquarters
3 Project street address: 929 North Front Street
City: Wilmington County. New Hanover
ZIP: 28401
4 What, if any, changes have been made to the project as permitted?
If the project has changed from the anginal approved plans, please complete SWU-101 for a Major
Modification or Minor Modification Application form available at: https://deg.nc.gov/about/dwisions/energy-
mineral-land-resources/energy-m ineral-la nd-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:/Ideg.nc.gov/about/divisions/energy-mineral-land-
resources/energy-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: River Ventures, LLC
2. Signing Official's Name: Henry W. Gerock III-----te St-nw�r� Ki.N,VC
- C4•rV W
3. Signing Official's Title Assistant Secretary
4 Mailing Address: ' 929 North Front Street
City: Wilmington State: NC ZIP 28401
5. Street Address 929 North Front Street
City: Wilmington Stale: NC ZIP :28401
6 Phone: ( 910 ) 251-0081 Email hank.gerock(a)ppd.com
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/ORIM. Only applications packages that
include all required items listed below will be accepted and reviewed.
Initial each item below to indicate that the required information is provided in the application package:
X 1. A permit application processing fee of $505.00 payable to NCDEQ.
X 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;
b. Limited Liability Company (LLC) — a manager or company official as those terms are defined
in 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.
X 4. O&M Agreements, Please select one:
❑ 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 to me. 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 permit.
7. [IF APPLICABLE] When the permittee is a corporation or a limited liability corporation (LLC):
Provide one hard copy and one electronic copy of documentation from the NC Secretary of State,
or other official documentation, which supports the titles and positions held by the persons listed in
Section C.2 per 15A NCAC 2H. 1043(3)(b).
https://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
I, Henry W. Gerock, III , 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 proper forms to modify or transfer the permit prior to any changes to the
project, SCMs, or ownership. All information provided on this permit renewal application is, to the best of my
knowledge, correct and complete.
Signature: (AV V IL Date: J c+�
NOTARIZATION:
I, Donna R. Crawford , a Notary Public for the State of
North Carolina County of New Hanover , do hereby certify
that
personally appeared before me
this the _A�= day of January 20 22 , and acknowledge the due
execution ofjt�aoforgging instrument. Witness my hand and official seal,
m)
__ ``nn F
CAO1O(
My
Stormwater Permit Renewal Application Form Page 3 of 3 May 11, 2018

N KT #04268
Permit No. Sal V' 2Sp tf pypy
State of North Carolina (to be provided by D WQ)
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 trench supplement for each system, design calculations, and plans and specifications showing all
stormwater conveyances and system details.
I. PROJECT INFORMATION
Project Name: PPD Corporate Headquarters
Contact Person: Fred B. Davenport, Jr. Phone Number: [phone]
For projects with multiple infiltration systems, a supplement form must be completed for each system. This
worksheet applies to: Trench East Infiltration in Drainage Area One (1)
(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 Sands
Infiltration Rate 7.0 ®in/hr or ❑cf/hr/sf (check appropriate units)
SHWT Elevation 17 fmsl (Seasonal High Water Table elevation)
Trench Design Parameters
Design Volume 8,678 c.f.
Design Storm 1.1 inch event (1.5 inch event for SA waters, I inch event for others)
Drawdown Time <1 days
47.8" w x 30" H x 6.25' L unit
Perforated Ripe Chamber Size inch diameter Cultec 330 HD (220 Units)
Perforated Pipe Chamber Length 1,375 ft.
No. Observation Wells 0 (may be required on a case —by-case basis)
Stone Type (if used) 1-1/2"-2"
Stone Void Ratio 40%
Trench Elevations (infect mean seal level)
Bottom Elevation 21 fmsl
Storage/Overflow Elevation 22.9 fmsl
Form SWU-107 Version 3.99 Pagel of4

Trench Dimensions d-'
Height 3.5 ft 9r / 4,
Length Vades see plan ft.
Vades see { L2
Width plan ft. Volume Provided -94N 915$ 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, 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. 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
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.
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
�11surfaces draining to the system, including any off -site drainage.
N/A 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 capture 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.
r. Side to bottom area ratio is less than 4:1.
Form SWIJ-107 Version 3.99 Page 2 of

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N/A s. Observation well(s) are provided (case -by -case basis).
N/A t. 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. INFILTRATION BASIN 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 vegetated
cover to maintain a maximum height of six -inches, and remove trash as needed.
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 I 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 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 5.25' the accumulated sediment shall be removed
from the system.
Benchmark is from top of grate of special infiltration curb inlettoutlet #11.
Form SWU-107 Version 3.99 Page 3 of

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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:
Address: 3151 Sot,
Phone: 91( 0) 221
Signature:
Fred B. Davenport, Jr., Vice -.President
170' Street, Wilmington, NC 28412
581 '--) S Date:
Note: The legally responsible party should not be a homeowners association unless more than 50% of the lots have been sold
and a resident of the subdivision has been named the president.
I, , a Notary blic for the State of ounry of
o hereby certify that personally appeared before me this
_ day of� - 1 p y—, ape, and acknowledge the due execution of the foregoing infiltration
basin maintenance requirements. Witness my hand and official seal
Form SWU-107 Version 3.99 Page 4 of