SW1190702_Cover Letter & Permit_20240214

�c STATE
h �y
ROY COOPER n
Governor
ELIZABETH S.BISER ` a
Secretary *`� QU"IAM
WILLIAM E.TOBY VINSON,,JR NORTH CAROLINA
Interim Director Environmental Quality
February 14,2024
Greater Asheville Regional Airport Authority
Attn: Michael Reisman, Chief Operating Officer
61 Terminal Drive, Suite 1
Fletcher,NC 28732
Subject: Post-Construction Stormwater Management Permit No. SW1190702
Asheville Regional Airport Modernization and Expansion
(formerly Expand Terminal Apron—South)
High Density Project
Buncombe County
Dear Mr. Reisman:
The Division of Energy,Mineral and Land Resources received a complete,modified Post-Construction
Stormwater Management Permit Application for the subject project on December 11, 2023. Staff review of the
plans and specifications has determined that the project, as proposed, complies with the Stormwater Regulations
set forth in Title 15A NCAC 2H.1000 amended on January 1,2017 (2017 Rules). Please refer to Attachment C
for a detailed description of the current proposed major modification. We are hereby forwarding the modified,
updated,and re-issued Permit No. SW1190702 dated February 14,2024,for the construction, operation and
maintenance of the built-upon areas(BUA) and stormwater control measures(SCMs)associated with the
subject project.Please replace the previous application (SWU-101), supplement, operation and maintenance
agreement, calculations with the attached modified versions. Please add the enclosed approved plans to the
previously approved plan set.
This permit shall be effective from the date of issuance until February 14,2032 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. 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 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 binding.
This project will be kept on file at the Asheville Regional Office. If you have any questions concerning this
permit,please contact Jim Farkas in the Central Office, at(919) 707-3646 or [e-mail].
Sincerely,
hu e& 4Pww57
.TZ7,William E. Toby Vinson,Jr.,Interim Director
Division of Energy,Mineral and Land Resources
Enclosures: Attachment A—Designer's Certification Form
Attachment C—Permitting History
Application Documents
DES/jf: \\WaterResources\DEMLR-Stormwater\SW Permits\SW1190702\SW1190702 Major Modification 20240214
cc: Nathan Hudgens,PE;Gresham Smith
Lew Bleiweis,Executive Director;Greater Asheville Regional Airport Authority
Jason Rogers,Buncombe County Building Inspections
Asheville Regional Office Stormwater File
D___E Q North Carolina Department of Environmental Quality I Division of Energy,Mineral and Land Resources
512 North Salisbury Street 1 1612 Mail Service Center I Raleigh,North Carolina 27699-1612
NORTH CAROLINA
De" mofUmmnmmUlu°anh 919.707.9200

Post-Construction Stormwater Management
Permit No. SW1190702
STATE OF NORTH CAROLINA
DEPARTMENT OF ENVIRONMENTAL QUALITY
DIVISION OF ENERGY, MINERAL AND LAND RESOURCES
POST-CONSTRUCTION STORMWATER MANAGEMENT PERMIT
HIGH DENSITY DEVELOPMENT
In compliance with the provisions of Article 21 of Chapter 143, General Statutes of North Carolina as
amended, and other applicable Laws, Rules, and Regulations promulgated and adopted by the North
Carolina Environmental Management Commission, including 15A NCAC 02H.1000 amended on
January 1, 2017 (2017 Rules) (the "stormwater rules"),
PERMISSION IS HEREBY GRANTED TO
Greater Asheville Regional Airport Authority
Asheville Regional Airport Modernization and Expansion
(formerly Expand Terminal Apron — South)
61 Terminal Drive, Fletcher, Buncombe County
FOR THE
construction, management, operation and maintenance of built-upon area (BUA) draining to two (2)
treatment swales and one (1) dry pond ("stormwater control measures" or"SCMs") 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 February 14, 2032 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.
1. BUA REQUIREMENTS. The maximum amount of BUA allowed for the entire project is
1,493,266 square feet. The runoff from all BUA within the permitted high density drainage areas
of this project must be directed into the permitted SCMs. The BUA requirements and allocations
for this project are as follows:
a. SCM BUA LIMITS. The SCMs labeled Swale 3, Swale 4, and Dry Pond 1 have been
designed to handle the runoff from 11,900 square feet, 36,850 square feet, and 215,541
square feet of BUA, respectively, within the delineated drainage areas. This permit does not
provide any allocation of BUA for future development within the delineated drainage areas.
This permit excludes 1,339,930 square feet of existing BUA.
2. PERVIOUS AREA IMPROVEMENTS. At this time, none of the pervious area improvements
listed in G.S. 143-214.7(b2) or the Stormwater Design Manual have been proposed for this
project. Pervious area improvements will be allowed in this project if documentation is provided
demonstrating those improvements meet the requirements of the stormwater rule.
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Post-Construction Stormwater Management
Permit No. SW1190702
3. SCM REQUIREMENTS. The SCM requirements for this project are as follows:
a. SCM DESIGN. The SCMs are permitted based on the design criteria presented in the
sealed, signed and dated supplement and as shown in the approved plans and
specifications. These SCMs must be provided and maintained at the design condition.
b. ALTERNATIVE DESIGNS. The stormwater system is permitted as a variation to the
requirements per 15A NCAC 02H.1003(6). In accordance with Federal Aviation
Administration August 28, 2007, Advisory Circular No. 150/5200-33B (Hazardous Wildlife
Attractants on or Near Airports), the Department shall not require the use of stormwater
retention ponds, stormwater detention ponds, or any other SCM that promotes standing
water at public airports that support commercial air carriers or general aviation. As such, this
project proposes treatment swales and a dry detention pond for stormwater management as
no other primary SCMs are suitable for the site. In addition, the minimum required
drawdown time of the design volume of the dry pond is reduced from 48 to 40 hours, the
small permanent pool required near the outlet orifice has been removed, and minimum
required seasonal high-water table (SHWT) separation from the lowest excavated point of
the dry pond is based on the prior (2019) existing ground surface elevation. The proposed
system has been found to provide equal or better stormwater control and equal or better
protection of surface waters. If the proposed SCM design fails and no longer meets the
intent of the stormwater rules, a modification must be submitted to either meet the
requirements or propose another variation from the rules. This is based on a case-by-case
decision and should not be used as a precedent for future permitting actions.
4. NON-ENFORCEABLE SCMS. The treatment swale (Swale 2) shown on the plans is not
required by the Division and has not been demonstrated to meet the Minimum Design Criteria
and therefore is not considered a part of the approved stormwater treatment system. This
additional measure is incorporated only by reference and is not enforceable parts of the permit.
Swale 2 was permitted under the original permit and modified by Major Modification #1, the
treatment provided by Swale 2 was included in the sizing of Dry Pond 1 and Swale 2 was
removed from the permit.
5. STORMWATER OUTLETS. The peak flow from the 10-year storm event shall not cause
erosion downslope of the discharge point.
6. VEGETATED SETBACKS. A 30-foot wide vegetative setback must be provided and maintained
in grass or other vegetation adjacent to all surface waters as shown on the approved plans. The
setback is measured horizontally from the normal pool elevation of impounded structures, from
the top of bank of each side of streams or rivers, and from the mean high waterline of tidal
waters, perpendicular to the shoreline.
a. BUA IN THE VEGETATED SETBACK. BUA may not be added to the vegetated setback
except as shown on the approved plans.
b. RELEASE OF STORMWATER NOT TREATED IN AN SCM. Stormwater that is not treated
in an SCM must be released at the edge of the vegetated setback and allowed to flow
through the setback as dispersed flow.
7. RECORDED DOCUMENT REQUIREMENTS. The permittee shall incorporate specific
restrictions, conditions, and operation and maintenance procedures into a facility management
plan or another legal instrument in lieu of recording the operation and maintenance agreement,
deed restrictions, and protective covenants with the local register of deeds.
8. CONSTRUCTION. During construction, erosion shall be kept to a minimum and any eroded
areas of the on-site stormwater system will be repaired immediately.
a. PROJECT CONSTRUCTION, OPERATION AND MAINTENANCE. During construction, all
operation and maintenance for the project shall follow the Erosion Control Plan requirements
until the Sediment-Erosion Control devices are converted to SCMs or no longer needed.
Once the device is converted to a SCM, the permittee shall provide and perform the
operation and maintenance as outlined in the applicable section below.
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Post-Construction Stormwater Management
Permit No. SW1190702
b. SCM RESTORATION. If one or more of the SCMs are used as an Erosion Control device
and/or removed or destroyed during construction, it must be restored to the approved design
condition prior to close-out of the erosion control plan and/or project completion and/or
transfer of the permit. Upon restoration, a new or updated certification will be required for the
SCM(s) and a copy must be submitted to the appropriate DEQ regional office.
9. MODIFICATIONS. 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
certifi cation(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), 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 infiltrating permeable pavement, #57 stone area, public trails, or
landscaping material to be considered a pervious surface that were not included in the
approved plans and specifications.
g. Other modifications as determined by the Director.
10. DESIGNER'S CERTIFICATION. Upon completion of the project, the permittee shall determine if
the project is in compliance with the approved plans and take the necessary following actions:
a. If the permittee determines that the project is in compliance with the approved plans, then
within 45 days of completion, the permittee shall submit to the Division one hard copy and
one electronic copy of the following:
i. The completed and signed Designer's Certification provided in Attachment A
noting any deviations from the approved plans and specifications. Deviations
may require approval from the Division;
ii. A copy of the recorded operation and maintenance agreement;
iii. Unless already provided, a copy of the recorded deed restrictions and
protective covenants; and
iv. A copy of the recorded plat delineating the public rights-of-way, dedicated
common areas and/or permanent recorded easements, when applicable.
b. If the permittee determines that the project is not in compliance with the approved plans, the
permittee shall submit an application to modify the permit within 30 days of completion of the
project or provide a plan of action, with a timeline, to bring the site into compliance.
11. OPERATION AND MAINTENANCE. The permittee shall provide and perform the operation and
maintenance necessary, as listed in the signed operation and maintenance agreement, to
assure that all components of the permitted on-site stormwater system are maintained at the
approved design condition. The approved operation and maintenance agreement must be
followed in its entirety and maintenance must occur at the scheduled intervals.
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Post-Construction Stormwater Management
Permit No. SW1190702
a. CORRECTIVE ACTIONS REQUIRED. If the facilities fail to perform satisfactorily, the
permittee shall take immediate corrective actions. This includes actions required by the
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.
b. MAINTENANCE RECORDS. Records of maintenance activities must be kept and made
available upon request to authorized personnel of the Division. The records will indicate the
date, activity, name of person performing the work and what actions were taken.
12. 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 15A NCAC 02H.1045(3).
13. 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.
14. 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:
i. 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;
V. The assignment of declarant rights to another individual or entity;
vi. The sale or conveyance of the common areas to a Homeowner's or Property
Owner's Association, subject to the requirements of NCGS 143-214.7(c2);
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.
15. COMPLIANCE. The permittee is responsible for complying with the terms and conditions of this
permit and the approved plans and specifications until the Division approves the transfer
request.
a. REVIEWING AND MONITORING FOR COMPLIANCE. The permittee is responsible for
verifying that the proposed BUA within each drainage area and for the entire project does
not exceed the maximum amount allowed by this permit. The permittee shall review and
routinely monitor the project to ensure continued compliance with the conditions of the
permit, the approved plans and specifications.
b. 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.
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Post-Construction Stormwater Management
Permit No. SW1190702
c. MAINTENANCE ACCESS. SCMs, stormwater collection systems, and vegetated
conveyances must be accessible for inspection, operation, maintenance and repair as
shown on the approved plans.
d. DIVISION ACCESS. The permittee grants Division Staff permission to enter the property
during normal business hours to inspect all components of the permitted project.
e. 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.
f. 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.
g. 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.
h. OTHER PERMITS. The issuance of this permit does not preclude the permittee from
obtaining and complying with any and all other permits or approvals that are required for this
development to take place, as required by any statutes, rules, regulations, or ordinances,
which are 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 modified, updated, and reissued this the 1411 day of February 2024.
NORTH CAROLINA ENVIRONMENTAL MANAGEMENT COMMISSION
d"teedc�wa4 Pow 57'-; William E. Toby Vinson, Jr., Interim Director
Division of Energy, Mineral and Land Resources
By Authority of the Environmental Management Commission
Permit Number SW1190702
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Post-Construction Stormwater Management
Permit No. SW1190702
Attachment A
Certification Forms
The following blank Designer Certification forms are included and specific for this project:
• As-Built Permittee Certification
• As-Built Designer's Certification General MDC
• As-Built Designer's Certification for Dry Detention Pond MDC
• As-Built Designer's Certification for Treatment Swale MDC
A separate certification is required for each SCM. These blank certification forms may be copied and
used, as needed, for each SCM and/or as a partial certification to address a section or phase of the
project.
Page 1 of 1

Post-Construction Stormwater Management
Permit No. SW1190702
AS-BUILT PERMITTEE CERTIFICATION
I hereby state that I am the current permittee for the project named above, and I certify by my
signature below, that the project meets the below listed Final Submittal Requirements found in NCAC
02H.1042(4) and the terms, conditions and provisions listed in the permit documents, plans and
specifications on file with or provided to the Division.
Check here if this is a partial certification. Section/phase/SCM #?
Check here if this is part of a Fast Track As-built Package Submittal.
Printed Name Signature
I, , a Notary Public in the State of
County of do hereby certify that
personally appeared before me this day of 120
and acknowledge the due execution of this as-built certification. (SEAL)
Witness my hand and official seal
My commission expires
Permittee's Certification NCAC .1042(4) Completed/ N/A
Provided
A. DEED RESTRICTIONS/ BUA RECORDS
1. The deed restrictions and protective covenants have been recorded Y or N
and contain the necessary language to ensure that the project is
maintained consistent with the stormwater regulations and with the
permit conditions.
2. A copy of the recorded deed restrictions and protective covenants Y or N
has been provided to the Division.
3. Records which track the BUA on each lot are being kept. (See Note Y or N
1
B. MAINTENANCE ACCESS
1. The SCMs are accessible for inspection, maintenance and repair. Y or N
2. The access is a minimum of 10 feet wide. Y or N
3. The access extends to the nearest public right-of-way. Y or N
C. EASEMENTS
1. The SCMs and the components of the runoff collection / conveyance Y or N
system are located in recorded drainage easements.
2. A copy of the recorded plat(s) is provided. Y or N
D. SINGLE FAMILY RESIDENTIAL LOTS - Plats for residential lots that Y or N
have an SCM include the following:
1. The specific location of the SCM on the lot. Y or N
2. A typical detail for the SCM. Y or N
3. A note that the SCM is required to meet stormwater regulations and
that the lot owner is subject to enforcement action as set forth in Y or N
NCGS 143 Article 21 if the SCM is removed, relocated or altered
without prior approval.
E. OPERATION AND MAINTENANCE AGREEMENT Y or N
1. The O&M Agreement is referenced on the final recorded plat. Y or N
2. The O&M Agreement is recorded with the Register of Deeds and Y or N
appears in the chain of title.
F. OPERATION AND MAINTENANCE PLAN — maintenance records are
being kept in a known set location for each SCM and are available for Y or N
review.
Page 1 of 8

Post-Construction Stormwater Management
Permit No. SW1190702
G. DESIGNER'S CERTIFICATION FORM — has been provided to the Y or N
Division.
Note 1-Acceptable records include ARC approvals, as-built surveys, and county tax records.
Provide an explanation for every requirement that was not met, and for every "N/A" below. Attach
additional sheets as needed.
Page 2 of 8

Post-Construction Stormwater Management
Permit No. SW1190702
AS-BUILT DESIGNER'S CERTIFICATION GENERAL MDC
I hereby state that I am a licensed professional and I certify by my signature and seal below, that I
have observed the construction of the project named above to the best of my abilities with all due care
and diligence, and that the project meets the below listed General MDC found in NCAC 02H.1050 in
accordance with the permit documents, plans and specifications on file with or provided to the
Division, except as noted on the "AS-BUILT" drawings, such that the intent of the stormwater rules
and statutes has been preserved.
Check here if this is a partial certification. Section/phase/SCM #?
Check here if this is a part of a Fast-Track As-Built Package Submittal per .1044(3).
Check here if the designer did not observe the construction, but is certifying the project.
Check here if pictures of the SCM are provided.
Printed
Name Signature
NC Registration
Number Date
SEAL: Consultant's Mailing Address:
City/State/ZIP
Phone Number
Consultant's Email address:
O Circle N if the as-built value differs from the Plan. If N is circled, provide an explanation on Page 2.
ON/E = not evaluated (provide explanation on page 2) ON/A = not applicable to this SCM or project.
Consultant's Certification NCAC .1003((3) & General MDC OAs-built ON/E ON/A
.1050
A. TREATMENT REQUIREMENTS
1. The SCM achieves runoff treatment. Y or N
2. The SCM achieves runoff volume match. Y or N
3. Runoff from offsite areas and/or existing BUA is Y or N
bypassed.
4. Runoff from offsite areas and/or existing BUA is directed Y or N
into the permitted SCM and is accounted for at the full
build-out potential.
5. The project controls runoff through an offsite permitted Y or N
SCM that meets the requirements of the MDC.
6. The net area of new BUA increase for an existing project Y or N
has been accounted for at the appropriate design storm
level.
7. The SCM(s) meets all the specific minimum design Y or N
criteria.
B. VEGETATED SETBACKS / BUA
1. The width of the vegetated setback has been measured Y or N
from the normal pool of impounded waters, the MHW
line of tidal waters, or the top of bank of each side of
rivers or streams.
2. The vegetated setback is maintained in grass or other Y or N
vegetation.
3. BUA that meets the requirements of NCGS 143-214.7 Y or N
b2 2 is located in the setback.
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Post-Construction Stormwater Management
Permit No. SW1190702
4. BUA that does not meet the requirements of NCGS 143- Y or N
214.7 (b2)(2) is located within the setback and is limited
to:
a. Publicly funded linear projects (road, greenway
sidewalk)
b. Water-dependent structures
c. Minimal footprint uses (utility poles, signs, security
lighting and appurtenances)
5. Stormwater that is not treated in an SCM is released at Y or N
the edge of the setback and allowed to flow through the
setback as dispersed flow.
OAs-built ON/E ON/A
C. STORMWATER OUTLETS —the outlet handles the peak Y or N
flow from the 10 year storm with no downslo a erosion.
D. VARIATIONS
1. A variation (alternative) from the stormwater rule Y or N
provisions has been implemented.
2. The variation provides equal or better stormwater control Y or N
and equal or better protection of surface waters.
E. COMPLIANCE WITH OTHER REGULATORY PROGRAMS Y or N
has been met.
F. SIZING -the volume of the SCM takes the runoff from all
surfaces into account and is sufficient to handle the required Y or N
storm depth.
G. CONTAMINATED SOILS — infiltrating SCM's are not Y or N
located in or on areas with contaminated soils.
H. SIDE SLOPES
1. Vegetated side slopes are no steeper than 3H:1 V. Y or N
2. Side slopes include retaining walls, gabion walls, or Y or N
other surfaces that are steeper than 3H:1V.
3. Vegetated side slopes are steeper than 3H:1 V (provide Y or N
supporting documents for soils and vegetation).
I. EROSION PROTECTION
1. The inlets do not cause erosion in the SCM. Y or N
2. The outlet does not cause erosion downslope of the Y or N
discharge point during the peak flow from the 10 year
storm.
J. EXCESS FLOWS —An overflow/ bypass has been Y or N
provided.
K. DEWATERING —A method to drawdown standing water has Y or N
been provided to facilitate maintenance and inspection.
L. CLEANOUT AFTER CONSTRUCTION —the SCM has been Y or N
cleaned out and converted to its approved design state.
M. MAINTENANCE ACCESS
1. The SCM is accessible for maintenance and repair. Y or N
2. The access does not include lateral or incline slopes Y or N
>3:1.
N. DESIGNER QUALIFICATIONS (FAST-TRACK PERMIT) —
The designer is licensed under Chapters 89A, 89C, 89E, or Y or N
89F of the General Statutes.
Provide an explanation for every MDC that was not met, and for every item marked "N/A" or "WE",
below. Attach additional pages as needed:
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Post-Construction Stormwater Management
Permit No. SW1190702
AS-BUILT DESIGNER'S CERTIFICATION FOR DRY DETENTION POND PROJECT
I hereby state that I am a licensed professional and I certify by my signature and seal below, that I
have observed the construction of the project named above to the best of my abilities with all due care
and diligence, and that the project meets all of the MDC found in NCAC 02H.1062, in accordance with
the permit documents, plans and specifications on file with or provided to the Division, except as
noted on the "AS-BUILT" drawings, such that the intent of the stormwater rules and the general
statutes has been preserved.
Check here if this is a partial certification. Section/phase/SCM #?
Check here if this is part of a Fast-Track As-Built Package Submittal per .1044(3).
Check here if the Designer did not observe the construction, but is certifying the project.
Check here if pictures of the SCM are provided.
Printed Name Signature
NC Registration Number Date
SEAL: Consultant's Mailing Address:
City/State/ZIP
Phone Number
Consultant's Email address:
O Circle N if the as-built value differs from the Plan/permit. If N is circled, provide an explanation on
page 2
ON/E = not evaluated (provide explanation on page 2) OO N/A = not applicable to this project or SCM.
This Certification must be completed in conjunction with the General MDC certification under NCAC
02H.1050
Consultant's Certification (MDC .1062) OAs-built ME OO N/A
A. Volume/ Elevations
1. The lowest point of the dry pond is a minimum of six inches Y or N
above the SHWT.
2. The drawdown orifice elevation of the dry pond is consistent Y or N
with the approved plans.
3. The bypass/overflow elevation of the dry pond is consistent Y or N
with the approved plans.
4. The ponding depth above the dry pond bottom is ten feet or Y or N
less.
5. The bottom of the dry pond is uniform in grade with positive Y or N
drainage to the outlet structure and free of high or lowspots.
6. An optional low-flow channel is provided. Y or N
B. Inlet/ Outlet/ Drawdown
1. Pretreatment is provided for incoming stormwater runoff. Y or N
2. The inlet and the outlet locations are situated per the Y or N
approved plan and avoid short-circuiting.
3. The design volume draws down in 2-5 days. Y or N
4. Hydrologic impacts to the receiving channel are minimized Y or N
from the 1- r 24-hr storm discharge.
5. The dry pond has a small permanent pool near the outlet Y or N
orifice.
6. A screen or other device to prevent large debris from Y or N
entering the outlet structure is provided.
7. The drawdown orifice is size is consistent with the permitted Y or N
value.
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Post-Construction Stormwater Management
Permit No. SW1190702
C. Landscape/Planting Landscape/Planting Plan
1. The dam structure is planted in a non-clumping turf grass. Y or N
2. Trees and woody shrubs are not present on the Y or N
embankment.
Provide an explanation for every MDC that was not met, or for every deviation from the permitted
condition below:
Page 6 of 8

Post-Construction Stormwater Management
Permit No. SW1190702
AS-BUILT DESIGNER'S CERTIFICATION TREATMENT SWALE MDC
I hereby state that I am a licensed professional and I certify by my signature and seal below, that I
have observed the construction of the project named above to the best of my abilities with all due care
and diligence, and that the project meets the below listed Treatment Swale MDC found in NCAC
02H.1061 in accordance with the permit documents, plans and specifications on file with or provided
to the Division, except as noted on the "AS-BUILT" drawings, such that the intent of the stormwater
rules and statutes has been preserved.
Check here if this is a partial certification. Section/phase/SCM #?
Check here if this is a part of a Fast-Track As-Built Package Submittal per .1044(3).
Check here if the designer did not observe the construction, but is certifying the project.
Check here if pictures of the SCM are provided.
Printed
Name Signature
NC Registration
Number Date
SEAL: Consultant's Mailing Address:
City/State/ZIP
Phone Number
Consultant's Email address:
O Circle N if the as-built value differs from the Plan. If N is
circled, provide an explanation on Page 2.
ON/E = not evaluated (provide explanation on page 2) ON/A = not applicable to this SCM or project.
Consultant's Certification NCAC 02H.1059 OAs-built ON/E ON/A
A. GEOMETRY
1. The swale is trapezoidal in cross-section. Y or N
2. The bottom width of the swale is no more than 6 feet Y or N
wide.
3. The side slopes of the swale are no steeper than 3:1. Y or N
4. The longitudinal slope of the swale does not exceed 7%. Y or N
5. The bottom of the swale is not excavated below the Y or N
seasonal high water table (SHWT).
B. GRASS SPECIFICATIONS
1. The grass species in the swale is a non-clumping and Y or N
deep-rooted species.
2. The grass species in the swale is able to withstand a Y or N
velocity of 4 feet per second.
3. The grass in the swale is maintained at an average Y or N
length of 6 inches.
4. The grass in the swale is not cut shorter than 4 inches. Y or N
C. DESIGN
1. The swale archives a maximum flow depth of 6 inches Y or N
during the 0.75 inch per hour storm.
2. The swale achieves a minimum hydraulic retention time Y or N
of 4 minutes during the 0.75 inch per hour storm.
3. The swale non-erosively passes the 10-year design Y or N
storm.
Page 7 of 8

Post-Construction Stormwater Management
Permit No. SW1190702
Provide an explanation for every MDC that was not met, and for every item marked "N/A" or"N/E",
below. Attach additional pages as needed:
Page 8 of 8

Post-Construction Stormwater Management
Permit No. SW1190702
Attachment C
Permitting History
Original Permit— Issued October 4, 2019
The original permit covers an expansion of the existing terminal apron to the south, the
reconfiguration of the existing employee parking area, the construction of a retaining wall and
other facilities, and utilizes four (4) treatment swales to provide stormwater management. This
project results in a net increase of 113,325 sf of BUA from existing site conditions.
Maior Modification #1 — Issued February 14, 2024
This modification includes the renovation and modernization of the airport facility which
includes the modification of the existing terminal and baggage handling facility footprints, the
addition of a central energy plant (and associated parking and utilities), and the relocation of
an existing private drive. Previously permitted treatment swale 1 is removed, previously
permitted treatment swale 2 was modified and removed from the permit, and dry detention
pond 1 is added to provide stormwater management for this modification (The sizing of dry
detention pond 1 includes the lost treatment provided by treatment swales 1 and 2). The
project area is increased to encompass the modification. This modification results in a net
increase of 153,336 sf of BUA from existing conditions.
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