SW8990306_Historical File_20080110

WArF
9 Michael F.Easley,Governor
Q
06 William G.Ross Jr.,Secretary
r North Carolina Department of Environment and Natural Resources
Coleen H.Sullins Director
Division of Water Quality
January 10, 2008
Raiford G. Trask, Jr., Owner
1202 Eastwood Road
Wilmington, NC 28403
Subject: Approved Plan Revision
Westfall Office Park
Stormwater Project No. SW8 990306
New Hanover County
Dear Mr. Dull:
On November 2, 2007, the Wilmington Regional Office received a request for a plan revision of
Stormwater Management Permit Number SW8 .:990306. The revisions include the following:
Plan Revision
CONSTRUCTION OF 15,745 SQUARE FEET OF BUILT-UPON AREA ASSOCIATED WITH A
NEW ACCESS ROAD TO GATEWAY BANK 5,911 SQUARE FEET OF THIS ACCESS ROAD
WILL DRAIN TO POND 1 AND 9,834 SQUARE FEET OF THIS ACCESS ROAD WILL DRAIN
TO POND 3. THIS PLAN REVISION WILL REDUCE THE FUTURE AMOUNT OF BUILT-UPON
AREA FOR POND 1 FROM 167,499 SQUARE FEET TO 161,588 SQUARE FEET.AND rr WILL
REDUCE THE FUTURE AMOUNT OF BUILT-UPON AREA FOR POND 3 FROM 246,872
SQUARE FEET TO 237,038 SQUARE FEET. HOWEVER,THE OVERALL BUILT-UPON AREA
FOR THIS DEVELOPMENT WILL REMAIN THE SAME. THERE WILL BE NO NET INCREASE
IN BUILT-UPON AREA.
Description Of Impervious Permitted BUA Prior Permitted BUA As Net Change
Areas To 01/10/2008 Of 01/10/2008 Square Feet)
• (Square Feet) (Square Feet)
Pond 9
Off-Site Permit SW8 050321 38,145 38,145 0
New Access Road - Gateway 0 5,911 5,911
�� Future 167,499 161,588 -
(5,911)
Totals 205,644 205,644 0
Pond 3
Off-Site Permit SW8 060944 25,434 25,434 0
Plan Revision 11/14/2006 13,535 13,535 0
(ia +NlL New Access Road -Gateway 0 9,834 9,834
r� Future 246,872 237,038 -(9,834)
Totals 285,841 285,841 0
NAk,Caro' a
7Vaturall
North Carolina Division of Water Quality 127 Cardinal Drive Extension Wilmington,NC 28405 Phone[phone] Customer Service
Wilmington Regional Office Internet: www.ncwaterqualitv.org Fax [phone]
An Equal OpportunitylAffirmative Action Employer—50%Recycled/10%Post Consumer Paper

Westfall Office Park Permit No. SW8 990306
Page 2 of 2
This office has 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 sheets.
Please be aware that all terms and conditions of the permit issued on April 10,
2001, 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.
If you have any questions concerning this matter, please do not hesitate to call
me at [phone].
Sincerely,
GPI
Rhonda Hall
Environmental Engineer
ENB\rbh: S:IWQS\STORMWATIREVISION1990306PR.jan08
cc: John S. Tunstall, P.E., Norris, Kuske & Tunstall
New Hanover County Building Inspections
Rhonda Hall
Wilmington Regional Office
Central Files

J.
p
NORRIS, KUSKE TUNSTALL John
/ ohn A. Kuske, III, P.E.
John S.Tunstall, P.E.
CONSULTING ENGINEERS , INC . JA. Kuske, RE.ofCounsel
4,111111 .1.2.
November 1, 2007
Ms. Linda Lewis
NC DENR/ Division of Water Quality
Water Quality Section
127 Cardinal Drive Extension
Wilmington, NC 28405-3845
Re: Gateway Temporary Access Road at Research Park (Westfall Research Park)
State Stormwater Plan Revision to SW8 990306
951 Military Cutoff Road
Wilmington, NC REC-IRIV b
NKT Project No. 07204
NOV 0 2 2007
Dear Ms. Lewis:
We are enclosing two (2) sets of plans for your review reflecting impervio
area of the Gateway Bank temporary acces road at Research Park. The project was
previously permitted under SW8 990306 on e be4 6, with a total impervious
area for Pond #3 of 285,841 SF and a total of 205,644 SF for Pond #1. On November
14, 2006, your office issued a plan revision for the entrance road infrastructure to
Gateway Bank resulting in 13,535 SF of impervious area to Pond 3. An off-site permit
for Gateway Bank was issued on November 14, 2006 under off-site permit No. SW8
060944 permitting 25,434 SF of impervious area to Pond #3. The new access road to
Gateway Bank will result in 9,834 SF to Pond #3, therefore, leaving a future impervious
area balance in Pond#3 of 237,038 SF.
On April 7, 2005, an off site permit (SW8 050321) was written for the FNB Building in
the Pond #1 drainage area for 38,145 SF. The new access road will result in 5,911 SF
of impervious area to Pond #1, therefore, leaving a future impervious area balance of
161,890 SF.
Please us know if you need any additional information. Thank you for your
assistance on this project.
Sincerely,
NORRIS, KUSKE &TUNSTALL
CONSULTING ENGINEERS, INC.
1.46410
Jo n S. Tunstall, P.E.
JST/asn
07204 11-01-07-s-sw-plan revision-ltr
cc: Raiford G. Trask, Jr.
902 Market Street • Wilmington, NC 2840 1-473 3 • Phone:[phone] • Fax:9I 0.343.9604

State Stormwater Management Systems
Permit No, SW8 990306
• �` �� NKT#98244
Westfall Office Park Igivio
Stormwater Permit No.SW8 990306 •� 4/ .
New Hanover County i114
Designer's Certification
I, John S. Tunstall, P.E. ,asa duly registered Professional Engineer
in the State of North Carolina,having been authorized to observe(periodically/weekly/full time)the construction
of the project,
Westfall Office Park (Ponds 3 &4 Only)
(Project)
for Raiford G. Trask, Jr., Owner (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:
Pond#4: As per original permit, Stormwater Pond #4 was an expansion of an existing pond.
Therefore, the vegetation within the pond and on the northeast side slope was allowed
in the permit.
O01%.*puu u.JJ✓ 00
0%% c, � Ba SEAL
0
Signature /›. ap
uF S/�• /A
• �
Registration Number 19851 v ' 4 SEAL
19.9M1
®� �
• Date .�� ��'.
ti a
Rmc,.--%vt tr a-I3
MAR 2 3 2009
BY.
Page 1 of 2

State Stormwater Management Systems -
Permitio. SW$990306
Certification Requirements:
11 1. 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.
3. All the built-upon area associated with the project is graded such that the runoff drains to the system.
44. The outlet/bypass structure elevations are per the approved plan.
S. The outlet structure is located per the approved plans.
6. Trash rack is provided on the outlet/bypass structure.
/1 7. All slopes are grassed with permanent vegetation.
*Pond#4: 2:1 slope exists on northeast side of
(40 S. Vegetated slopes are no steeper than 3:1.
old existing pond.
r; 9. The inlets are located per the approved plans and do not cause short-circuiting of the system.
d�j 10. The permitted amounts of surface area and/or volume have been provided.
e11. Required drawdown devices are correctly sized per the approved plans.
4,12. All required design depths are provided.
dill 13. All required parts of the system are provided,such as a vegetated shelf,and a
forebay.
4_14. The overall dimensions of the system,as shown on the approved plans, are provided_
cc: NCDENR-DWQ Regional Office
Tony Roberts,New Hanover County Building Inspector
Raiford Trask, Jr.
Mike Brown /Autumn Hall, Inc.
Page 2 of 2