SW8050547_Historical File_20150909

.:�
.......... 1 6*,W-
WDENR
North Carolina Department of Environment and Natural Resources
Pat McCrory
Governor
September 9, 2015
Julie Wilsey, Director
New Hanover County Airport Authority
1740 Airport Boulevard
Wilmington, NC 28405
Subject: Approved Plan Revision
Wilmington International Airport
ILM Flex Space (Business Park Lot 9)
Stormwater Permit No. SW8 050547
New Hanover County
Dear Ms. Wilsey:
Donald van der Vaart
Secretary
On August 26, 2015, the Wilmington Regional Office received a plan revision for Stormwater
Management Permit Number SW8 050547. The revisions include the following specific changes:
1. The addition of 62,570 square feet of built -upon area for the Business Park access road
between Airport Boulevard and Garner Drive and the addition of 66,512 square feet of built -
upon area for Lot 9 of the Business Park for building and parking associated with the ILM Flex
Space. Runoff from all this built -upon area is permitted to be treated in the previously permitted
Extended Dry Detention Basin (EDDB).
After this project, a total of 3,012,132 square feet remains available for future development
within the Phase I & II EDDB drainage area.
Pre-treatment for the project will be provided by the grassed swale pre-treatment areas added to the
permit on November 29, 2012. It has been determined that a formal permit modification is not required
for the proposed changes. We are forwarding you an. approved copy of the revised plans for your files.
Please add the attached plans to the previously approved plan set.
Please be aware that all terms and conditions of the modified permit issued on November 29, 2012,
remain in full force and effect. Please also understand that the approval of this revision to the
approved plans for the subject State Stormwater Permit is done on a case -by -case basis. Any
other changes to this project must be approved through this Office prior to construction. The
issuance of this plan revision does not preclude the permittee from complying with all other
applicable statutes, rules, regulations or ordinances which may have jurisdiction. over the proposed
activity, and obtaining a permit or approval prior to construction.
If you have any questions concerning this matter, please do not hesitate to call me at [phone].
Sincerely,
z4ldl�e
Linda Lewis
Environmental Engineer III
YP GDS1arl: G:1WQ1Shared\StormwateAPermits & Projects120051050547 HD12015 09 permit PR 050547
cc: Jeremy Blair, P.E., Paramounte Engineering
New Hanover County Building Inspections
Wilmington Regional Office Stormwater File
Division of Energy, Mineral, and Land Resources
Land Quality Section - Wilmington Regional Office
127 Cardinal Drive Extension, Wilmington, North Carolina 28405
(910) 79&7215 I Fax: [phone] - Internet: http://Dortal.ncdenr.org/web/ir/

State Stormwater Management Systems
Permit No. SW8 050547
The master permit tables for Phase I and II were added to the permit on September 20,
2010, as part of the review for the modification to SW8 060515.
Phase III was added on October 26, 2011.
A modification to the tables was added on November 27, 2012.
Phasing refers to the extended dry detention basin, not to the airport BUA.
Master Permit No. SW8 050547 Phase I & II Basin
Starting New BUA balance = 8,520,835-4,552,087 = 3,968,748
Mod/Offsite
Permit No.
Date Issued
Offsite Project Name
Proposed
BUA
Remaining
BUA
SW8 050801
8/12/2005
General Aviation Apron
Expansion
151,589
3,817,159
SW8 060326
4/7/2006
Air Wilmington FBO
Building
196,725
3,620,434
SW8 060515
5/14/2008
Credit Card Parking Lot
225,722
3,394,712
SW8 050547
10/28/2009
ILM Phase I and Phase II
for gravel roads
15,843
3,378,869
SW8 050547
11/27/2012
Delineate a new overall
DA, increase the max BUA
allowed.
0
3,378,869
SW8 050547
2/8/2013
Consolidated Rental Car
Facility CONRAC
205,202
3,173,667
SW8 050547
8/4/2015
North General Aviation
Apron Rehab & Expansion
32,453
3,141,214
SW8 050547
9/9/2015
ILM Flex Space (Lot 9
Business Park) and
Business Park access
road.
129,082
3,012,132
Master Permit No. SW8 050547 Overall Basin
Offsite Permit No.
Date Issued
Offsite Project Name
Proposed
BUA
Remaining
BUA
Page 2 of 2

Date Received
Fee Paid ex'press only)
Permit Number
l�Q�
J� lec> !�!/ 676
State of North Carolina
Department of Environment and Natural Resources
Division of Energy, Mineral and Land Resources
STORMIATATER MANAC'EMENT PERMIT PLAN REVISION APPLICATION FORD
This form may be photocopied for use as an original
I. GENERAL INFORMATION
1. Stormwater Management Permit Number: SW8 9595847
2. Project Name: ILM Flex Space (Business Park - Lot 9
3. Permit Holder's name (specify the name of the corporation, individual, etc.):
New Hanover County Airport Authority /�
4. Print Owner/Signing Official's name and title (person legally responsible for permit): EC E'VE
. r
iulie Wilsey, Airport Director y AUG 2 6 2015
5. Mailing Address for person listed in item 2 above: $y;
1740 Airport Blvd, Suite 12
City: Wilmington State: NC Zip: 28405
Phone: ( 910 ) 3414333 Fax: ( Vho 7
Email: iwilseyQ�ilm.com
II. PLAN REVISION INFORMATION
1. Summarize the plan revision proposed (attach additional pages if needed):
Revisions include addition of roadways sidewalks and the development of a commercial building and
associated parking on Lot 9 of the Business Park. See attached spreadsheet for impervious breakdown
III. SUBMITTAL REQUIREMENTS
Only complete application packages will be accepted and reviewed by the Division of Energy, Mineral and
Land Resources (DEMLR). A complete package includes all of the items listed below. The complete
application package should be submitted to the DEMLR Office that issued the permit.
1. Please indicate that you have provided the following required information by initialing in the space provided
next to each item.
'ti is
• Original & 1 copy of the Plan Revision Application Form
• Two (2) copies of revised plans (must be revisions of original approved plan sheet(s))
If a12.dying for Express review (only available in 20 coastal counties): Doi
• Application fee of $500.00 (made payable to NCDENR) o
VL APPLICANT'S CERTIFICATION
I, (print or type name of person listed in General Information, item 3) Julie Wilsey, Airport Director
certify that I have authorized these plan revisions and that the information included on this plan revision
application is th best of my knowledge, correct and complete.
. �I (5
Signature: Date: � �d
Plan Revision Form ``J Rev. Oct. ? 1, 2013

Original Permit Conditions (SW8 0505047)
syr •Ifr aor +a ior� '
f ra91 M . as
Pima i a.1#:
Receiving Stream Name
Smith Creek
Smith Creek
Smith Creek
Stream Class & index No.
C,Sw 18-74-63
C,Sw 18-74-63
C,Sw 18-74-63
Drainage Area (sf)
14,041,075
12,529,107
12,529,107
1,511,968
On -site Drainage Areas
14,041,075
1,511,968
Off -site Drainage Area sf)
0
0
0
Proposed Impervious *Area A
9,751,185
8,520,835
1,230,351
% Impervious * Area total)
69.4%
68.0%
81.4%
1M ;... s ! Surface Area .
On -site Buildings (sf)
n/a
n/a
n/a
On -site Streets (sf)
n/a
n/a
n/a
On -site Parking s
n/a
n/a
n/a
On -site Sidewalks (sf) '
n/a
n/a
n/a
Other On -site (s
15,843
n/a
n/a
Future Development sf
8,094,084
8,520,835
899,275
Future BUA to meet original design
n/a
n/a
331,076
Off -site (sf)
n/a
n/a
n/a
Existing BUA *** (sf)
1,641,258
n/a
n/a
Totals :
9,751,185
8,520,835
1,230,351
Plan Revision (Lot #9 & Roadway) - 7/16/15
flos,jo ..
SLIA
:..'....
Receiving Stream Name
Smith Creek
Smith Creek
Smith Creek
Stream Class & Index No.
C,Sw 18-74-63
C,Sw 18-74-63
c,Sw 1844-63
Drainage Area (sf)
14,041,075
12,529,107
1,511,968
On -site Drainage Area (sf)
14,041,075
12,529,107
1,511,968
Off -site Drainage Area (sf)
0
0
0
Proposed Impervious * Area (sf)
9,751,185
8,520,835
1,230,351
% Impervious * Area total
69.4%
68.0%
81.4%
On -site Buildings s
n/a
10,377
n/a
On -site Streets (sf)
n/a
52,520
n/a
On -site Parking (sf)
n/a
51,985
n/a
On -site Sidewalks s
n/a
14,200
n/a
Other On -site (sf)
15,843
0
n/a
Future Development (s
8,094,084
3,012,132
899,275
Future BUA to meet original design
n/a
n/a
331,076
Off -site (sf)
n/a
n/a
n/a
Existing BUA *** (s
1,641,258
5,379,621
n/a
Total (sf):
1 9,751,185
8,520,835
1,230,351
ECEIVE
AUG 2 6 2015
BY:

MEMORY TRANSMISSION REPORT
FILE NO.
403
HATE
09.09 16:01
TO
93414365
DOCUMENT PAGES
3
START TIME
09.09 16:02
END TIME
09.09 16:03
PAGES SENT
3
STATUS
OK
TIME -09-09-2015 16:03
FAX NO.1
NAME
`SUCCESSFUL TX NOTICE'
.X3QiLf' Ci®w�a�.nnr
Shaba oFNorth CaroVina
Deyartment ee'Envlroam�ns ma l�ataral
v'ooea oRics
FAX G'QVLB $Y%'�'�.'7C
BGeio�eroee
%�ol�oiiR vm+.iPer Yeue�i Sdr+e�sry
Dade' ��z'//—�
To-/�i _t ��✓
Co:
G "���>r/.
x��'.�
��/ ,G-
No. Pagedt Ceacol_ oovac):
Fs+om: 7oC`.s�nr
Fa=: 92101350-2004
az�cacamall�va�aoaaeota�aac2saos�(5iao>'sss-�isowaaypaatoraoacoudcy.4fxa�msaw.arcxlaoa7� paoyer

PatMcCrory, Governor
State of North Carolina
Department of Environment and Natural Resources
Wilmington Regional Mee
FAX COVER SHEET Dmuidd R van der Vaar4 Secretary
Date: �/ �� No. Pages (excl. cover):
To: C-1" e �d L S From: 7o Casmer
Co: 41 'Ile �'',G�E' i d��/•�4�� Phone: [phone]
Fax: Fax: [phone]
Re: L 0G-X�,g L
--- J4� �z
127 Cardinal Drive Extension, Wilmington, NC 28405 e.[phone] ® An Equal Opportunity Affirmative Action Employer

MEMORY TRANSMISSION REPORT
TIME :09-09-2015 16:02
FAX N0.1
NAME
FILE NO.
402
DATE
09.09 16:01
TO
97916760
DOCUMENT PAGES
3
START TIME
09.09 16:01
END TIME
09.09 16:02
PAGES SENT
3
STATUS
OK
`SUCCESSFUL TX NOTICE'
State of Noath CaroSnm
Y►epartmeat of Snvi■+umaeatt A"49 Wat"Via Reioure"
cmm—
Fa�X. Svey, fur xr kx CO` riwit MITT r.eowmm m — dw Mmp.* �ccs�trt'y'
inw9w: e" 7 '�-�I No_ Paget Cereal_ owar):
Fax: �%�� �• G �� � �. Fax f910) 35e-20aa
Yin: .�� � /Y% �• �/`l�y i� i4 �` �-
/ r
!�d'�r� li�yi.� i ra �J i'_S�� yr n� �dr �• cT�
127 C.onils-+s xx-i a Wiu-umomo. NQ 28405 (9103 796-T215 r A► M4+a1 n 1=a o

State of North Carolina
]Department of Environment and Nataral Resources
Wilmington Regional Office
Pat McCrory, Governor FAX COVER SHEET Donald R van der Vaar4 Secretary
Date: f, ;e No. Pages (excl. cover):
To: ✓f �'/ Zi From: 7o Casmer
Co: � Phone: (910, 796-7336
Fax: ��� ` Cam' ! Fax: [phone]
veo' � — a
127 Cardinal Drive BL-Wnsion, Wilmington, NC 28405 o,[phone] o An Equal Opportunity Affirmative Action Employe:

e-11"U
PARAMOUNTE, v
E " G I N E E F2 I " G, I " C. 5�
5911 OLEANDER DRIVE, SUITE 201 �� 1�
W I L M I N G T O N, NC 2 8 4 0 3
9 1 0- 7 9 1- 6 7 0 7( 0) 9 1 0- 7 9 1- 6 7 6 0 1 F 1
L E T T E R O F T R A N S M I T T A L
To:
NCDENR-WiRO
Date
8/26/15
Land Quality Section
127 Cardinal Drive Extension
Re:
Plan Revision for SW8 0505047
Wilmington, NC 28403
1
ILM - Business Park Phase I
FA;;�-J
Ms. Linda Lewis
Pro`ect No.
15114YE
e are se n
® Originals
® Prints
❑ Shop Drawings
❑ Calculations
he following items:
❑ Correspondence
® Plans
❑ Specifications
® Other as listed below
Quantity
Date
Dwg. No.
Description
2
7/16/15
Plans (24" x 36" Sheets)
1
8/26/15
Design Narrative
2
7/14/15
Permit Plan Revision Application Form (Original and one copy)
1
6/27/13
Check No.1283 for $500 Application Fee
ssue Status: ® For Approval ❑ As Requested ❑ Construction ❑ Bid
❑ For Your Use ❑ For Review and Comment ❑ Approved as Noted ❑ See Remarks
ction Taken: ❑ No Exceptions Taken ❑ Make Corrections Noted ❑ Amend & Resubmit
❑ Rejected - See Remarks ❑ Approved as Submitted ❑ Other
emarks:
ECEIVE
AUG 2 6 2015
BY:

DESIGN NARRATIVE
The New Hanover County Airport Authority is requesting a plan revision to NCDENR
Stormwater Permit SW8 0505047 for new roadway within the business park and to build a
building, parking, and sidewalks on Tract #9 of the business park. The existing permit allows
for a total impervious area in Phases I & II of 8,520,835 sf. Currently, there is an existing
impervious total of 5,379,621 sf, leaving 3,141,214 sf for future development. The new
development will add 129,082 sf of impervious area, making the total impervious area 5,508,703
sf and leaving 3,012,132 sf for future development.
ECEIVE
AUG 2s2o15
ay._
a Set n
Q's
rp�y� {['jam
/s�
1 L' I c 'F�1j�l/tl101f6YY