SW8040323_HISTORICAL FILE_20050401 (2)

STORMWATER DIVISION CODING SHEET
POST -CONSTRUCTION PERMITS
PERMIT NO.
SW8 nLAQ323
DOC TYPE
❑ CURRENT PERMIT
❑ APPROVED PLANS
HISTORICAL FILE
❑ COMPLIANCE EVALUATION INSPECTION
DOC DATE
2ooSC)L4
YYYYMMDD

�QF WATF9O Michael F. Easley, Governor
�O G William G. Ross, Jr., Secretary
�? r- North Carolina Department of Environment and Natural Resources
> =i
O Alan W. Klimek, P.E. Director
Division of Water Quality
April 1, 2005
Mr. Jon Vincent, Member/Manager
Tri-Coast Properties, LLC
1508 Military Cutoff Road, Suite 302
Wilmington, NC 28403
Subject: Approved Plan Revision
Shallotte Shops
Stormwater Project No. SW8 040323
Brunswick County
Dear Mr. Vincent:
On February 7, 2005, the Wilmington Regional Office received a plan revision for Stormwater
Management Permit Number SW8 040323. The revisions include the deletion of a building
unit and parking area, and the addition of a drive -through lane. The net change in total built -
upon area is zero, however the amount of built -upon area available for future development is
reduced to 7,499 square feet. 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 replace the old approved plan sheets C1 and C2 with the new
ones, enclosed. This plan revision supercedes the one issued on October 14, 2004.
Please be aware that all terms and conditions of the permit issued on April 12, 2004,
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 (910)
395-3900.
Sincerely,
Linda Lewis
Environmental Engineer
ENB\arl: S:\WQS\STORMWAT\REVISION\040323.apr05
cc: Phil Tripp, P.E., Tripp Engineering
Delaney Aycock, Brunswick County Building Inspections
Linda Lewis
Wilmington Regional Office
Central Files
North Carolina Division of Water Quality 127 Cardinal Drive Extension Phone [phone] Customer Servicel-871{23-6748
Wilmington Regional Office Wilmington, NC 28405-3845 FAX [phone] Internet. h2o.ennstate.nc.us One
NorthCarolina
An Equal Opportunity/Affirmative Action Employer— 50%Recycledll0°/ Post Consumer Paper Naturally

ItFEB
15,2005 02:25P
February 15, 2005
9107635631
TRIPP EriliiGiNE*ERIN­6� P.C.
419 Chescmk!st�e6i;-
wilrtlingron, North C4r:6Iin*! -28401
1111011c: [phone] - liAX [phone]
NCDENR
Division Water Quality
127 Cardinal Drive
Wilmington, NC 28405-3845
Attn-. Ms.,Lizidal Lewis
it
Re: Shallotti!Shops
Project No. SWS 040323
TIE 03128
Dear Linda;
Per your'remarks via facsimile dated February. 11. 2005, we offer the following:
We have added an asphalt access area for a drive-ilrru to accommodate a tenant
for the proposeil ng. buildiThis accommodation resulted -in-a reduction to the building
. ;. �ml t '11-i - A
impervious area (eight 22' x 57,' units in lieu of�nifiu 22,,l.x 57' units) and future
impervious area in order to maintain the'pfevi'c)usly+perhiitte',d'impervious area. Hence,
the request for a plan revision.
Sincerely,
Tripp Engineering, P.C.
4k "U'r"t
Monica V. Loughlin
N4VL:dcb
Enc.
page

State of North Carolina
Department of Environment and Natural Resources
r Wilmington Regional Office
Michael F. Easley, Governor William G. Ross Jr., Secretary
FAX COVER SHEET
Sh2(tofIe SiV195 SW 504-0323
Date: 2 -11-05 No. Of Pages: 2
To: Hvnl'c2 LcughUn From: Und2 LeyjlS
CO: CO: OW!Q
FAX #: '703-5Co31 FAX#: [phone]
REMARKS: Re25e P)-0�(I-Je 2rq eX(A 2n 2 h-CY) of
wh2i- fhe; (art-oosPd revisicr)s en e
127 Cardinal Drive Extension, Wilmington, N.C. 28405-3845 Telephone [phone] Fax [phone]
An Equal Opportunity Affirmative Action Employer

FILE MODE
926 MEMORY TX
P. 1
* * COMMUNICATION RESULT REPORT`(:FEB.'11.2005 12:OSPM )
TTI NCDENR WIRO
OPTION ADDRESS (GP.OUP,lr6:: RESULT PAGE
--------------------------------------
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E-3) NO ANSWER
State o
Department of Envir(
Wilmingti
Michael F. Easley, Governor
I
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FAX C(
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Date: 2- II_OS N
To: �ianlca �vahlir3 F
CO: C
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REMARKS: f�IQ2se rr��'de
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127 Cardinal Drive Extension, Wilmington, N.C.:
An Equal Opportunity
E-2) BUSY
E-4) NO FACSIMILE CONNECTION
Resources
William G. Ross Jr., Secretary
SHEET
SwJ8G4v323
2
of
ne (910) 395,3900 Fox [phone]
Employer

TRIPP ENGINEERING, P.C.
419 Chestnut Street
Wilmington, North Carolina 28401
Phone: [phone] • FAX: [phone]
February 4, 2005
NCDENR
Division Water Quality
127 Cardinal Drive
Wilmington, NC 28405-3845
Attn: Ms. Linda Lewis
Re: Shallotte Shops
Project No. SW8 040323
TE 03128
Dear Linda:
Thank you for clarifying the difference between a permit modification and a plan
revision. With that, I am requesting a plan revision for the above referenced project.
Enclosed please find two (2) sets of revised plans and calculations for your
approval. Please contact us with any questions, comments or if you need additional
assistance. Thank you.
Sincerely,
Tripp Engineering, P.C.
Ak, /V- ' /J'
Monica V. Loughlin
MVL:dcb
Enc.
FES 0 7 2005

2/4/2005 Shallotte Shops 03128
MVL Stormwater Calculations
Total Draina a Area
s . ft.
acres
88,652
2.04
Impervious Area
Land Use
s .ft,
acres
buildin s
10,032
0.23
as halt
43,480
1.00
concrete
3,016
0.07
future
7,499
0.17
Tota I
64,027
1.47
Stormwater Calculations:
Time of Concentration
Hydraulic Length (L) = 630 ft.
hange in Height (H) = 4 ft.
Tc = (La /H).Joo / 128
= 7.84 min.
Flow for 10 year, 6 hour Storm (Q10)
QPRE _ (CPRE) x (hc) x (Area)
3.21 cfs
QPosT = (CPosT) x (I,c) x (Area)
= 9.74 cfs
Detention Pond Design:
D-a Q;-
Surface Area
(sq. ft.)
4,668
jNormal
g531.00
5,725
8,837
320
Total Provided Storage Volume:
Vol. _ [(Normal pool SA + Flood Pool SA) / 2]
x (F.P. elev. - N.P. elev.)
= 5,716 cu.ft.
% impervious = 0.722
= 72.2%
say 73.0%
CPRE - 025
CPosT = (% imp.)(.95)+(1% imp-)(.25)
0.76
Ito = 6,30 in/hr
150 = 7.79 in/hr
Flow for 50 year, 6 hour Storm (Cleo)
QPRE _ (CPRE) x (I10) x (Area)
3.96 cfs
QPosT = (CPosT) x (ho) x (Area)
= 12.05 cfs
State Surface Area Requirement at normal pool
Pond side slopes = 3 :1
Depth below N.P. = 5 ft.
SA/DA = 0.0521
(Chart for 90% TSS Removal for Wet Detention
Pond without Vegetative Filter)
Required SA = (SA/DA) x (Total Drainage Area)
= 4,619sq. ft,
State Volume Requirement for Store e of first 1" runoff:
Rv = .05+.009(Percent Impervious)
0,7000056 in/in
Vol. = (Design Rainfall)(Rv)(Drainage Area)
71 cu. ft.
=O QOFESSIpy��.l,
y 9r9,
SEAL
S -0 17374
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�OREGOR;,�t
03128-Pond 1 of 2

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2/4/2005
MVL
Pond Volume:
Shallotte Shops
Stormwater Calculations
Bottom SA = 320 sq. tt.
Normal Pool SA = 4,668 sq. ft.
Vol. _ [(N.P. SA + Bottom SA) / 21 x (N.P. el. - Bottom el.)
12,470 cu.ft.
ForebaV:
Required Volume
Vol. = 20% of storage volume
2,494 cu.ft.
Provided Volume
Bottom SA = 356 sq. ft.
Normal Pool SA = 1,395 sq. ft.
Vol. _ [(N.P. SA + Bottom SA) / 21 x (N.P. el. - Bottom el.)
= 9 R97 ... ft
3 ft.
Outlet Structure Design:
Flow for 2-day drawdown.
for 1st 1" of stormwater,
Q = Required Vol. / 172,800 sec. (2-days)
= 0.030 cfs
r Area or ripe for t-uay oidwuuwn.
= Q/ [Cd x SQRT(2 x g x h)]
Cd = 0.6
g = 32.2 ft./sz
h = (F P, elev.-N.P elev.)/2
0.55 ft.
A = 0.0084 sq. ft.
Diameter of Pipe for 2-daV drawdown
DIA. = SQRT[(A x 4) / pi]
= 0.1033 1
= 1.24
Use 1.0" orifice
Outlet Structure Check:
Using a 4' x 4' Basin,
Perimeter (L) = 16 ft.
Q = CIA
C = (% imp.)(.95) + (1-% imp.)(.25)
= 0.76
1 = 6.30 in. for a 10 yr. Storm
A = 2.04 Acres
= 9.74 cfs
Flow for 5-day drawdown:
for 1st 1" of stormwater,
Q = Required Vol. /432,000 sec.(5-days)
0.012 cfs
Nequirea Area or ripe Tor z)-oay ❑rawoown.
A= Q/ (Cd x SQRT(2 x g x h)]
Cd = 0.6
g = 32.2 ft./s2
h= IF.P. elev.-N.P. elev.)/2
= 0.55 ft.
A= 0.0034 sq. ft.
Diameter of Pipe for 5-day drawdown:
DIA. = SQRT[(A x 4) / pi]
0.0653 ft.
0.78 in.
Q= CwxLxH"
H = [Q / (Cw x L)]v'
Cw = 3
0.35 ft.
Peak elevation = flood pool elevation + H
32,45 ft.
03128
03128-Pond 2 of 2

Shallotte Shops Revision
Subject: Shallotte Shops Revision
From: Linda Lewis <[e-mail]>
Date: Wed, 26 Jan 2005 12:27:13 -0500
To: Monica Loughlin <[e-mail]>
Monica:
First, you need to understand the difference between a permit modification and
plan revision. The permit modification involves the rewriting of the permit to
charfge something and requires a $420.00 fee. A plan revision involves the
rearrangement of the same amount of built -upon area, and requires no fee. You
appear to be proposing both, but you have not submitted the required fee.
Second, I see from the revised supplement that the permanent pool and storage
elevations have changed from what was permitted. If this is the case, then the
permit will have to be rewritten to reflect these changes, meaning a $420.00 fee is
required. The revised plans we approved on October 14, 2004, and the permit issued
on April 12, 2004, indicate a permanent pool (normal pool) elevation of 31.0 and a
temporary pool (flood pool) elevation of 32.1, while the plans submitted on January
21 indicate 30.8 and 31.9, respectively. While the difference remains the same, the
elevations on the plans are different than what is shown in the permit.
If you change your pond details and go back to the permitted elevations, then I can
treat this as a plan revision, with no fee.
Please advise as to what course of action you wish to take.
Linda
1 of 1 1/26/2005 12:27 PM

North Carolina
James D. Simons, PG, PE
Director and State Geologist
r
NC®ENR
Department of Environment and
Division of Land Resources
Land Quality Section
January 25, 2005
RECEIVE4 D
IAN 66 2005
BY:__
Natural Resources
Michael F. Easley, Governor
William G. Ross Jr., Secretary
LETTER OF RECEIPT OF REVISED EROSION CONTROL PLAN
Tri Coast Properties
Mr. Jon T. Vincent, Mbr/Mgr.
1508 Military Cutoff Road
Wilmington, NC 28403
RE: Project Name: Shallotte Shops
Project ID: Bruns-2004-269
County: Brunswick
River Basin: Cape Fear
Submitted By: Tripp Engineering
Date Received by LQS: January 21, 2005
Plan Type: REVISED
Dear Mr. Vincent:
This office has received the revised soil erosion and sediment control plan submitted for the project
listed above. G.S. 113A-54.1(a) requires that this office approve or disapprove a submitted revised plan within
15 days of receipt of such plan. Failure to act by this office within this time period shall be deemed approval of
the revised plan.
Commencement or continuation of a land -disturbing activity under the jurisdiction of this Act prior to
the approval of an erosion and sediment control plan is a violation of the Act.
The approval of an erosion and sediment control plan is conditioned on the applicant's compliance
with Federal and State water quality laws, regulations and rules.
If you have questions please do not hesitate to contact this office. Your cooperation in this matter is
appreciated and we look forward to working with you on this project.
Sincerely,
Todd C. Walton
Land Quality Section
cc: Monica V. Loughlin, Tripp Engineering, PC
LQS—WiRO; SWS-WiRO
W ilntington Regional Office
127 Cardinal Drive Extension, Wilmington, NC 28450 Phone: [phone] Fax: [phone]

TRIPP ENGINEERING, P.C.
419 Chestnut Street
Wilmington, North Carolina 28401
Phone: [phone] • FAX: [phone]
January 14, 2005
NCDENR
Division Water Quality
127 Cardinal Drive
Wilmington, NC 28405-3845
Attn: Ms. Linda Lewis
Re: Shallotte Shops
Project No. SW8 040323
TE 03128
Dear Linda:
I'm writing to request a modification to existing permit No. SW8 04023. Due to a
contract tenant that requires a drive-thru, the building, parking and access areas have
been reconfigured accordingly.
Please note that the drainage area and impervious surfaces have not changed.
Revised drawings, calculations, narrative, page 2 of the stormwater permit application,
and page 1 of the wet detention basin supplement are attached.
Please review for approval and contact us with any questions, comments or if you
need additional assistance. Thank you.
Sincerely,
Tripp Engineering, P .
AAM-(, v ° t, V�
Monica V. Loughlin
MVL:dcb
JAN 2 1 '1005
Enc.

1/10/2005
MVL
Shallotte Shops
Stormwater Calculations
03128
Total Drainage Area
s . ft.
acres
88,652
2.04
Impervious Area
Land Use
sq. ft.
acres
buildings
10,032
0.23
asphalt
43,480
1.00
1
concrete
3,016
0.07
future
7,499
0.17
Total
64,027
1.47
Stormwater Calculations:
Time of Concentration
Hydraulic Length (L) = 630 ft.
hange in Height (H) = 4 ft.
Tc = (L' /H).'6° / 128
= 7.84 min.
Flow for 10 year, 6 hour Storm (Q,o)
OPRE _ (CPRE) x (hc) x (Area)
= 3.21 cfs
o PosT = (CPosT) x (ho) x (Area)
9.74 cfs
Detention Pond Design:
Pond Size:
Elevation
ft.
Surface Area
(sq. ft.)
Normal Pool
- 30.80
4,668
Flood Pool
31.90
5,725
Top of Bank
34.80
8,837
Bottom of Pool
25.80
320
Total Provided Storage Volume:
Vol. _ [(Normal pool SA + Flood Pool SA) / 2]
x (F.P. elev. - N.P. elev.)
= 5,716 cu.ft.
% impervious = 0.722
0
say 73.0%
CPRE = 0.25
CPosT= (%imp.)(.95)+(1%imp.)(.25)
= 0,76
Ito = 6.30 in/hr
Iao = 7.79 in/hr
Flow for 50 year, 6 hour Storm (Qso)
QPRE _ (CPRE) x (110) x (Area)
= 3.96 cfs
QPosT = (CPcsT) x (1io) x (Area)
= 12.05 cfs
State Surface Area Reauirement at normal cool
Pond side slopes = 3 :1
Depth below N.P. = 5 ft.
SA/DA = 0.0521
(Chart for 90% TSS Removal for Wet Detention
Pond without Vegetative Filter)
Required SA = (SA/DA) x (Total Drainage Area)
4,619sq. ft.
State Volume
��jj CARP
RECEIVED \\�°pFFsS%pyL9
�ZFa SEAL 4;
17374
FEB 0 7 2005 ti`•.F Q: `Q
DweGciNEy�Q/
SNBU40323 �� REGG
PROJ # /��7�//llfllltltttl"
irement for Storaqe of first 1"
03128-Pond 1 of 2

•1 /10/2005
MVL
Shallotte Shops
Stormwater Calculations
03128
Pond Volume:
Bottom SA = 320 sq. ft.
Normal Pool SA = 4,668 sq. ft.
Vol. _ [(N.P. SA + Bottom SA) / 21 x (N.P. el. - Bottom el.)
= 12,470 cu. ft. I
Forebay:
Required Volume
Vol. = 20% of storage volume
= 2,494 cu. ft.
Bottom SA = 356 sq. ft.
Normal Pool SA = 1,395 sq, ft.
Vol. _ [(N.P. SA + Bottom SA) / 21 x (N.P. el.
2,627 cu,ft.
depth = 3 ft.
Outlet Structure Design:
Flow for 2-day drawdown:
for 1st 1" of stormwater,
Q = Required Vol. / 172,800 sec. (2-days)
= 0.030 cfs
rea Area or ripe for o-aay arawaown:
A= Q/ [Cd x SQRT(2 x g x h)]
Cd = 0.6
9 = 32.2 ft./s2
In = (F.P. elev.-N.P elev.) /2
= 0.55 ft.
Diameter of Pioe for 2-dav drawdown
DIA. = SQRT[(A x 4) / pi]
0.1033 ft.
1.24
Use 1.0" orifice
Outlet Structure Check:
Using a 4' x 4' Basin,
Perimeter (L) = 16 ft.
Q = CIA
C = (% imp.)(.95) + (1% imp.)(.25)
= 0.76
1 = 6.30 in. for a 10 yr. Storm
A = 2.04 Acres
= 9.74 cfs
Bottom el.)
Flow for 5-day drawdown:
for 1st 1" of stormwater,
Q = Required Vol. /432,000 sec.(5-days)
0.012 cfs
Kea Wrea Area or F me Tor o-oav arawaown
LA
= Q/ [Cd x SQRT(2 x g x h)]
Cd = 0.6
9 = 32.2 ft./sz
h = (F.P. elev. - N.P. elev.) / 2
= 0.55 ft.
=_ 0.0034 sq. ft.
Diameter of Pipe for 5-day drawdown:
DIA. = SQRT[(A x 4) / pi]
= 0.0653 ft.
0.78 in.
Q= CwxLxH
H = [Q / (Cw x L)IM
Cw = 3
0.35 ft.
Peak elevation = flood pool elevation + H
32.25 ft.
03128-Pond
2of2

O1/14/05
Stormwater Narrative
Shallotte Shops
Brunswick County, NC
TE03128
Shallotte Shops is a 2.04-acre existing vacant tract proposed for a commercial shopping center.
Impervious areas include 10,032 sf of building, 3,016 sf of sidewalk and 43,480 sf of asphalt.
7,499 sf is allocated for future impervious area, creating a total lot impervious area of 64,027 sf.
The total percent impervious is 72.2%.
The project will be treated by wet detention. The detention pond will be designed to meet the
State's V and the County's 10-year pre -post requirement. Outflow from the pond drains to the
Shallotte River, classification SC HQW.