20090157 Ver 1_More Info Received_20090601

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SEGO
Southern Environmental Group, Inc.
5315 South College Road, Suite E
Wilmington, North Carolina 28412
910.452.2711 (office) • 910.452.2899 (fax)
Transmittal Letter
Date: 29 May 2009
To: Mr. Ian McMillan
Of: DWQ/401 Oversight Express Review Permitting
Attached you will find:*
SEGi Project #. 04-202.01
Clent Name, Mr. Wllllam H. Smith
USACOE Action ID#: 20D4-1149-065
1
JUN 2009 WAT WET(gND$?iRyp STORE EiR BRANCH
? Proposal ? Sketch(es) ? Permit ? Signed Wetland Map ? Photo(s)
? JD Package ? Report(s) ? Plans ® Information Request ? Other
Copies Dated Description
1 05/29/09 Response to Comments from Stormwater Unit
'it noted items are NOT attached, please contact our office.
These are being delivered:
® For your Review/Comment ® For your Records ? Returned for Correction(s)
? Corrected and Returned ? For your Signature ? As Requested
? Other:
By: ® Hand Delivery ? Fed-Ex ? UPS ? Regular Mail ? Other
Notes:
Ian:
Attached is SEGi's response to comments received from DWQ's Stormwater Unit on 06 March 2009. We apologize for the delay in our
response - we have been attempting to obtain information from outside sources, which took longer than anticipated. This information is
being provided to your office in an effort to ensure all regulatory agencies receive the same information pertaining to this project. Please
review the attached documentation, and feel free to contact my office with any questions or concerns at 910.452.2711. Thank you, in
advance, for your time and consideration.
Signature and (Typed) Name:
7 v,c ,
Amanda L. Kolb
Date: 29 May 2009
joutkern Environmental Group, Inc.
5515 South College Koacl, juite E_ - Wilmington, North Carolina 28+12-
910.-+52-271 1 - Fax: [phone] • of [e-mail]
www.segi.us (' t
?
29 May 2009 Q@ L4 J!P
Hand Delivery JUN 1 2JQg
WETLANDS AND STORE TER BRANCH
N.C. Division of Water Quality /Stormwater
Attn: Ms. Kelly Johnson
127 Cardinal Drive Extension
Wilmington, NC 28405-5406
Re: 421 Truck Stop Expansion Project [SEGiProject#: 04-202.01]
Wilmington, New Hanover County
Response to Comments (Stormwater Permit # SW8 900421)
Dear Ms. Johnson:
This letter is in reference to the proposed expansion of an existing truck stop facility, located at
1610 US Highway 421 North in Wilmington, New Hanover County, North Carolina. Southern
Environmental Group, Inc. (SEGi) has been retained by Mr. William H. Smith, the owner and
Applicant, to address all comments listed within a letter received from the Division of Water
Quality's (DWQ) Stormwater Unit. Please see below:
1. State Stormwater Permitting Process:
a.) Rules Subject: This facility was originally issued a State Stormwater permit
in 1990. The site drains to the Northeast Cape Fear River, Stream Index Number
18-74-(61), classified SC; SW in the Cape Fear River Basin. The facility will
need to modify its existing high density State Stormwater permit to accommodate
the expansion. The area of the site that is currently permitted under SW8900421
will continue to be permitted under that permit. The area that will be added due
to the expansion will be added to SW8900421. However the new area will be
subject to 15A NCAC 02B .1000 with the effective date of October 1, 2008, and
SL 2008-211.
A modification to the entire existing Stormwater design will be applied for
by Coastal Site Design, PC. The new design has been procured to handle all
stormwater associated with the site. The proposed modification to the
existing design will require the removal of the Vortechs system and seven
sand filters. The new plan calls for the use of multiple sand filters and
vegetative filters. The Applicant is proposing to regrade a portion of the
existing site, eliminate the existing sand filters on-site, and install two larger
5r-6i
sand filters, which will address the increase in impervious surface area on
the subject parcel.
According to the engineer, State Stormwater requires vegetative filters to
serve as an off-line bypass, so when the storage pipes are full, there is an
outlet for the water to discharge. The discharged water must be conveyed
through a vegetative filter to assist with pollutant removal. The vegetative
filters aide in removing pollutants from water that is not being conveyed
through the sand filters. The vegetative filters will be raised one to two feet
above the existing wetlands and the raised filters will be planted with grass,
to assist in pollutant removal (see Attachment A).
b) Density Determination: The facility is currently operating under a high-
density permit due to the amount of built-upon area and due to the presence of a
piped collection system. An initial review of the materials provided indicates that
this modification will likely be required to be permitted as high-density. High-
density permits required structural stormwater best management practices (BMPs)
to treat the effluent. Examples of stormwater BMP options include wet ponds
and infiltration basins.
Pursuant to the requirements of the State Stormwater Program, the
modified stormwater plan implements Stormwater BMPs . The BMPs which
will be put into place include sand filters and vegetative filters. According to
the NC DENR Stormwater BMP Manual, underground sand filters are useful
on sites where space is limited. They are highly effective at filtering total
suspended sediment. Perimeter sand filters are useful for small sites with
flat terrain or high water table, which are all characteristics of the subject
parcel.
The NC DENR Stormwater BMP Manual states that the use of vegetative
filters as stormwater controls can reduce pollutants such as sediment and
organic matter. Vegetative filters can slow the velocity of water and promote
infiltration.
Stormwater BMP Options: The site is currently permitted with seven sand
filters and one Vortechs Stormwater Treatment System Unit. The Vortechs unit
was permitted as one of five innovative projects in the Wilmington Region. The
permit requires that the permittee conduct quarterly monitoring and submit
monitoring reports regarding the function of the Vortechs unit. To date, none of
the required monitoring reports has been submitted. The Division conducted an
initial inspection on February 10, 2009. Staff inspected sand filters and observed
manholes on-site, but were not able to enter the manhole(s) to inspect the
Vortechs unit. The owner will receive a Notice of Inspection (NOI). A follow up
SEGO
inspection will be scheduled to observe the Vortechs unit and to determine if it is
in compliance. If the unit is not in compliance with the permit, a Notice of
Violation (NOV) will be issued. In instances where applicants request
modifications to permits that are not in compliance, the Division will review the
application to determine if the facility can be brought into compliance under
existing conditions with existing equipment. If this is not the case, the Division
may require alternate treatment. In this instance, the Division may reconsider the
use of the Vortechs unit an require an alternate BMP.
It is SEGi's understanding that the stormwater permit, issued 02 September
2003, was applied for, and issued to, Mr. William A. Ambrose, Executive
Vice President of the Worsley Companies (See Attachment B). A review of
the issued permit, and the original permit application, provided verification
that Mr. William H. Smith, the property owner, was not listed, nor copied,
on either document.
The stormwater permit application has Mr. Ambrose listed as the
"Applicant (name of the corporation, individual, etc., who owns the
project)". Mr. Ambrose is also listed as the "person legally responsible for
[the] facility and compliance" (See Attachment Q. Therefore, it is SEGi's
understanding that Mr. Ambrose, or one of his constituents, should have
been performing the required monitoring of the Vortechs system and the
seven sand filters. SEGi contacted the Worsley Company and was informed
that Mr. Ambrose is no longer employed by the company. SEGi advised the
Worsley Company of the stipulations associated with their issued
stormwater permit, and the fact it appeared they may be in non-compliance,
to which the Worsley Company replied they would work on obtaining the
information requested by the DWQ Stormwater Unit.
Since that phone conversation, SEGi understands that the Worsley
Company has hired a firm to provide data regarding the project, as it relates
to the Stormwater permit issued to the Worsley Company. However, SEGi
is not privy to that information, and we hope the DWQ Stormwater Unit will
contact the Worsley Company to obtain that data, and any other
requirements of that permit. Since the Stormwater permit was issued to Mr.
Ambrose, of the Worsley Company, SEGi believes our client, who has stated
that he was not aware of the permit modification, or the permit application,
should not be penalized for the Worsley Company's compliance, or non-
compliance, with the permit conditions.
Our client, Mr. Smith, has contracted a new engineer, Coastal Site Design, to
redesign the system, which will address the increase in impervious surface
associated with the proposed truck stop expansion. The redesigned system
5r-GI
has eliminated the need for the Vortechs system and the seven sand filters.
The modified plan calls for the use of sand filters and vegetative filters,
which have been discussed throughout this response letter.
2. Reverse Osmosis effluent:
On July 25, 2008 the Division received a letter from Worsley Operating
Corporation regarding NPDES permit N00065307. This letter informed the
Division that, "A Sludge Management Plan for the permit renewal is not required
as [Worsley Operating Corporation] will be discharging backwash water from the
site's reverse osmosis system into the stormwater system." Please be advised that
draining Reverse Osmosis (RO) backwash to the stormwater treatment system is
not acceptable. RO backwash is wastewater. Wastewater discharge is not
covered under stormwater permits issued under 15A NCAC 02B .1000 or SL
2008-211. If RO backwash is currently being discharged, it is doing so in
violation of the facility's stormwater permit and may be subject to penalties. RO
backwash discharge will not be covered in the stormwater permit modification.
Again, Mr. Smith, the property owner, was unaware that the Worsley
Operating Company submitted a modification to the existing NPDES Permit
N00065307, and was also not aware the the proposed modification would be
in violation of the facility's approved NPDES permit.
SEGi has contacted the Worsley Operating Company and informed them
that their proposed modification to the existing NPDES permit may
constitute a violation. SEGi was informed that the Worsley Operating
Company would contact the DWQ Stormwater Unit to determine an
appropriate course of action to rectify the situation. SEGi has attempted to
communicate with the Worsley Company, but unfortunately, SEGi has been
unable to obtain any of the Worsley Company's data. It is SEGi's sincere
hope that Mr. Smith, our client, will not be penalized for the alleged failure
of a permit holder who was issued a permit, without the property owner, our
client, being aware of the permit application or issuance. Please feel free to
contact the Worsley Company, at 910-395-5300, regarding the alleged
violation of the stormwater permit and the alteration to the NPDES permit.
For clarification of the statements mentioned above, please refer to the following documentation
attached to this correspondence:
A. Cross-sectional drawing, produced by Coastal Site Design, which depict
locations of proposed stormwater management facilities;
B. Stormwater Permit SW8 900421 Modification, issued to Mr. William A.
Ambrose on 2 September 2003; and,
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C. Stormwater Application, submitted on behalf of Mr. William A. Ambrose
on 23 August 2002.
It is SEGi's sincere hope that the submittal of the responses above, and the documentation
attached, will satisfy the concerns voiced by the DWQ Stormwater Unit. If you have any
remaining questions or concerns, please feel free to contact me via telephone at 910.452.2711, or
email, at amanda(a,se i.us. Thank you for your time and consideration with regard to this
project.
Sincerely,

Amanda L. Kolb
Environmental Consultant
Enclosures: (3)
cc: Ms. Emily Hughes (USACE)
Mr. Stephen Rynas (DCM)
Mr. Chad Coburn (DWQ)
Mr. Ian McMillan (DWQ)
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? C'V)YYnex-'k -b
NOV.20.2006 1:16PM NCDENR WIRO 1`10.524 P.2
0? WATk;71 Michael F. Easley, Govemor
O .J)Iliam G. Ross Jr. Secretary
North Carolina Department of Environment and Natural ?tesources
p -? Alan W. Igimek, p,E.,Director
Division of Water Quality
Coleen H. Sullins' De uty Direddr
Division of plater Quality
September 2, 2003
Mr. William A. Ambrose, Ex. Vice President
Worsiey Companies
PO Box 3227
Wilmington, NC 28406
Subject: Stormwater Permit No. SW8 900421 Mod.
Scotchman Store #303
High Density Project
New Hanover County
Dear Mr. Ambrose:
The Wilmington Regional Office received.a com lets,
Management Permit Application for Scotchman tore #303 oen A49uust 29,2003. Sta
review of the plans and Specifications has determined that the? prol?ect a ff
comply with the Stormwater Regulations set forth in Title 1SA NCAC ' s pro?ppoosed, will
forwarding Permit No, SW8 900421 dated September 2, 2003, for the consstOruuctio a are
the subject project. n of
This permit shall be effective from the date of Issuance.until September 2, 2013, and
shall be subject to the conditions and limitations as specified therein, Please
special attention to the Monitoring requirements,. and the Operation and Maintenance
requirements in this permit Failure to establish an adequate system for monitoring,
operation and maintenance of the stormwater management system
compliance problems. will result in fure
If any parts, requirements, or limitations contained in this permit are unacce table'
have the right to request an adjudicatoty hearing upon within P
YOU
days following receipt of this pennk This renest mast bein thef request of a riittte?'?g)
petition, conforming to Chapter 1505 of the North Carolina General Statutes,
with the Office of Administrative Hearings, P.O. Drawer 274,47, Raleigh, NC 2761 led
7447. Unless such demands are made this permiti shall be final and binding.
If you have ant, questions, or need additional information concernin this
contact Linda wis, or me at [phone], g matter, please
Sincerely,
l„
Rick Shiver 1
RSS/ed: SAWQSISTORMWAT1PERiyliT1900Wq Water Regional Supervisor
cc: Richard Collier, P.E., McKim and Creed
Tony Roberts, New Hanover County Building Inspections
Beth E. Wetherill, New Hanover County Engineering
Division of Coastal Management
Linda Lewis
Wiimingg??on Regional office
Centrallles
N. C. Division of Water GuaGry
Wilmington Regional oMm
127 Cardinal Drive Extension [phone]
'
Wilmington. NC 2W5 Customer Service
(gi0) 350.200a Fax [phone] Nina
NOV.20.2006 1:16PM NCDENR WIRO
STATE OF NORTH CAROLINA
DEPARTMENT OF ENVIRONMENT AND NATURAL RESOURCES
DIVISION OF WATER QUALITY
STATE 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 GRANTEO TO
William A. Ambrose, Ex. Vice President, Worsley Companles
Scotchmen Store #303
New Hanover County
FOR THE
construction, operation and maintenance of 7 sand filters and one Vortechs Storrmwater
Treatment System Unit in compliance with the-provisions of 15A NCAC 2H .1000
(hereafter ref erred to as the '"sto?tnwater rulesl and the approved stonnwater
management plans and specifications and other supporting data as attached and on file
with and approved by the Division of Water Quality and considered a part of this permit.
This permit shall be effective from the date of issuance until September 2, 2013, and
shall be subject to the following specified conditions and limitations:
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 on pages 4, 5 and 6 of this permit, the Project Data Sheets.
The stomtwater controls have been designed to handle the runoff from 69,240;
800;1,400;1200; 15,500; 4,300; 3,400; and 2,400 square feet of impervious
area, respectw;ly.
3. The tract will be limited to the amount of built-upon area indicated on page 3 of
this permit, and per approved plans.
4. All stonnwater collection and treatment systems must be located per the
approved plans.
5. The runoff from all built-upon area within the permitted drainage areas of this
project must be directed into the appropriate permitted stormwater control
system, per the approved drainage area plan.A permit modification must be
submitted and approved prior to the construction of additional built upon area
from outside of the approved drainage area.
NO. 524 P.3
State Stormy-•er Management Systems
Permit N, 3W8 900421 Modification
2
NOV.20.2006 1:17PM NCDENR WIRO NO.524 P.4
State Storm, w Management Systems
Permit No. SW8 900421 Modification
6. Each sand fitter consists of a sediment chamber and a sand chamber. The sand
depth shall be a minimum of 18". 'Runoff is designed to sheetflow over the grated
side of the filter into the sediment dhamber to settle large solids. The runoff will
then flow over weirs cut into the wall at the approved elevations,
into the sand
chamber for treatment. A minimum 6" orifice shall be provided at the bottom of
each sand chamber to allow the treated runoff to be discharged.
7. The Vortechs Stormwater Treatment unit must be designed! S? ed and installed
per Vortechs specifications to achieve a minimum a5% TSS removal efficiency.
8• Quarterly monitoring of the outflow from the Vortechs Unit is required. See
Section IV of this permit for speclfic monitoring requirements.
9. In the event that the Vortechs Unit fails to function as required, or to meet the
85% TSS, removal efficiency minimum, the sytem shall be replaced by other
permittabie stormwater management measures, such as a sand filter.
10. Drainage Area #3 consists of the area by the diesel pumps and is served by an
Oil/Water Separator, not covered by this permit.
3
NOV.20.2006 1:17PM NCDENR WIRO NO.524 P.5 }
State Stormy' ' 3r Management Systems
Permit Nc,. -.,W8 900421 Modifcation
DIVISION OF WATER QUALITY
PROJECT DESIGN DATA SHEET
Project Name: Scotchman Store #303
Permit Number: SW8 900421 Mod.
Location: New Hanover County
.
Applicant: William A. Ambrose, Exec. Vice President
Mailing Address: Worsley Companies
PO Box 3227
Wilmington, NC 28406
Application Date: August 29, 2003
Receiving Str+eamtRiver Basin: N.E. Cape Fear River / Cape Fear
Stream Index Number: CPF1718-74-61
Classification of Water Body: "SC Sw"
System Number: 2 4 5 ' 6
Design Storm: 1" 1" in
Drainage Area,.:
't
t`- 800 1400
800 1 1200 15500
e, f
ns
Offske, f?: 400
0 0 1200
0 15500
0
Total Impervious Surfaces, ft7: 800 1400' 1200 15500
Filter & Sed. Chamber Depth 18" 18" 18" 18"
Filter & Sed. Chamber Length: 10' 10' 10' 90'
Filter & Sed. Chamber Width: 18" 18" 18" 18"
' TSS removal efficiency: 85% a 30' filter is required. however, due to
site constraints, one will not be constructed
Top of sand elevation, FMSL: 4.7 4.7 4.7 5.3
Permitted Surface Area, ft2: .30 30 30 270
Permitted Storage Volume, ft3: 45 45 45 405
Weir Elevation to Sand Filter, FMSL: 4.45 4.45 4.45 5.05
Outlet Orifice: 6" ? 6" ? 6"o 6"0
4
NOV.20.2006 1:17PM NCDENR WIRO NO.524 P.6
State Stormy-er Management Systems
Permit NL 3W8 900421 Modification
DIVISION OF WATER QUALITY
PROJECT DESIGN DATA SHEET
Project Name: Scotchman Store #303
Permit Number: SW8 900421 Mod.
Location: New Hanover County
Applicant: William A, Ambrose, Exec, Vice President
Mailing Address: Worsley Companies
PO Box 3227
Wilmington, NC 28406
Application Date: August 29. 2003
Receiving Stream/River Basin: N.E. Cape Fear River / Cape Fear
Stream Index Number: CPF1 7 18-74-61
Classification of Water Body: "SC Sw"
System Number. 7 8 9
Design Storm: 1" 1 ° 1 •
Drainage Area, ,
30 3400
240
Onsite,
Offshe, ft2: 4
0 0 Q
0
Total Impervious Surfaces, 112: 4300 3400' 2400
Filter & Sod, Chamber Depth: 18" 18" 18"
Filter & Sed. Chamber Length: 35' 35' 25'
Filter & Sed. Chamber Width: 18^ 18" 18«
TSS removal efficiency: 85% a 30' filter is required , however, due to
site constraints, one will not be constructed
Top of sand elevation, FMSL: 4.9 5.2 5.45
Permitted Surface Area, f i2: 105 105 75
Permitted Storage Volume, ft3: 157,5 157.5 112.5
Weir Elevation to Sand Filter, FMSL: 4.65 4.95 5.2
Outlet Orifice: 6°0 6°? 6"+
5

NOV.20.2006 1:17PM NCDENR WIRO NO.524 P.7
State Storm- `er Management Systems
Permit N- SW8 90042 Modification
DIVISION OF WATER QUALITY
PROJECT DESIGN DATA SHEET
Project Name:
Permit Number.
Location:
Applicant:
Mailing Address:
Application Datd:
Receiving Stream/River Basin:
Stream Index Number
Classification of Water Body:
System Number
Design Storm:
Drainage Area,:
Onsite, ft`.
Offsite, ft2:
Total Impervious Surfaces, ft2:
Model Number.
Expected TSS Removal Efficiency:
Design Ratio:
Runoff Coefficient
Scotchman Stone #303
SW8 900421 Mod.
New Hanover County
William A. Ambrose, Exec, Vice President
Worsley Companies
PO Box 3227
Wilmington, NC 28406
August 29, 2003
N.E. Cape Fear River / Cape Fear
CPF1718-74.61
"Sc Sw"
Vortechs Unit
1"
59,240
559,240
59,240
Model 5000.
89%
14.3
0.9
6

NOV.20.2006 1:17PM NCDENR WIRO NO.524 P.8
State Stormv, '°r Management Systems
Permit NL_ jW8 900421 Modification
II. SCHEDULE OF COMPLIANCE
'i . 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.
2. During construction, erosion shall be kept to a minimum and any eroded areas of
the system will be repaired immediately,
3. The permittee shall at all times provide the operation and maintenance
necessary to assure the permitted stormwater system functions at optimum
efficiency. The approved Operation and Maintenance Plan must be followed in its
entirety and maintenance must occur at the scheduled intervals including, but not
liMheeddth:
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 outlet structure, orifice device, flow
spreader, catch basins and piping.
g. Access to the outlet structure must be available at all times.
4. Records of maintenance activities must be kept and made available upon
request to authorized personnel of DWO. The records will Indicate the date,
activity, name of arson performing the work and what actions were taken.
Documentation ofthe Wrtechnics Unit inspections and maintenance shall be
made on the forms provided by the company, copy attached.
5. Decorative spray fountains will not be allowed in the stormwater treatment
system.
6. The facilities shall be constructed as shown on the approved plans. This permit
shall become voidable unless the facilities are constructed in accordance with the
conditions of this permit, the approved plans and specifications, and other
supporting data.
7. Upon completion of construction, prior to issuance of a Certificate of Occupancy,
and prior to operation of this permitted faculty, a certification must be received
from an appropriate designer for the system installed certifying that the permitted
facil has been installed in accordance with this permit, the appproved plans and
specs ications, 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.
8. 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.
7
NOV.20.2006 i:18PM NCDENR WIRO
' NO. 524 P.9
State Storrrr, "'or Management Systems
Permit N. aW8 900421 Modification
8. At least 30 days prior to the sale or lease of any portion of the property, the
permittee shall notify DWQ and provide the name, mailing address and phone
number of the purchaser or leasee. An access/maintenance easement to the
stormwater facilities shall be granted in favor of the permittee if access to the
stormwater facilities will be restricted by the sale or lease of any portion of the
property.
10. The permittee shall submit to the Director and shall have received approval for
revised plans, sp
below ecifications, and calculations prior to construction, for any
modification to the approved plans, including, but not limited tel those listed
:
a. Any revision to any item shown on the approved plans, Including the
stormwater management measures, built-upon area, details, etc,
b. Project name change.
C. Transfer of ownership.
d. Redesign or addition to the approved amount of built-upon area or to the
drainage area.
e. Further subdivision, acquisition, or sale of all or part of the project area.
The project area is defined as all property owned by the permitter, for
which Sedimentation and Erosion Control Plan approval or a LAMA Major
permit was sought.
f. illing in, altering, or piping of any vegetative conveyance shown on the
approved plan.
11. The permittee shall submit final site layout and grading plans for any permitted
future areas shown on the approved plans, prior to construction. If the proposed
BUA exceeds the amount permitted under this permit, a modification to the
permit must be submitted and approved prior to construction.
12. A copy of the approved plans and specifications shall be maintained on file by
the ermittee for a minimum of ten years from the date of the completion of
construction.
13. The permittee must maintain compliance with ,the proposed built-upon area and
ensure that the runoff from all the built-upon is directed into the permitted system.
14. 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 Qermittee shall submit a written time schedule to the
Director for modifying the site to meet minimum requirements. The permittee
shall provide copes of revised plans and certification in writing to the Director
that the changes have been made.
15. The permittee must maintain the current permitted drainage area. No additional
runoff from outside of the permitted drainage area boundary may enter the
permitted stormwater facilities without first applying for and receiving a permit
modification.
III. MONITORING REQUIREMENTS
1. The permittee shall submit a monitoring plan to the DWQ for approval within 60
days of receipt of this permit, for the Vortechs Unit.
2. Quarterly monitoring of both influent and effluent is required. Samples shall
consist of a grab sample of the first flush (within the first 15 minutes of discharge
from the unit and flo-paced composide samples collected, at a minimum over
the first three hours of the event.
NOV.20.2006 1=18P11 NCDENR WIRO' 110.524 P.10
State Stormwr `-r Management Systems
Permit No. N8 900421 Modification
3. Samples must be collected in each of the four seasons. Monitoring parameters
shall include the following at a minimum. Additional parameters may be added on
a case-by-case basis, to address water quality Issues in the area.
a. Total Suspended Solids
b. Oil and grease
c. TKN
d. Ammonia Nitrogen
e. Nitrate-Nitrite ,
f. Total Phosphorous
g. Total Coliform °
h. Fecal Coliform
1. Enterococcus
j. Flow
4. The storrh event date, total rainfall and duration must be recorded for both the
storm event prior to the sampled event and the sampled event.
5. All samples shall be collected from a representative storm event. A
representative storm event is an event that measures greater than 0.1 inches of
rainfall and that is preceded by at least 72 hours during which no storm event
measuring greater than 0.1 inches has occurred, A single storm event may
contain up to 10 consecutive hours of no precipitation. For example, if it rains for
2 hours without producing a collectible discharge, and then stops, a sample may
be collected if a rain protfucing discharge begins again within the next 10 hours.
6. The permittee shall split samples with DWQ for at least two events during the first
year after the Vortechs unit is installed. The ppermittee shall notify the Division as
soon as possible of their intent to provide split samples.
7. Within 30 days of receiving laboratory results, the permittee shall submit copies
to the Division of Water Quality, Stormwater and General Permits Unit,16T7
Mail Service Center, Raleigh, NC 27699-1617. All data submitted must
reference the project name, location and permit number.
8. The permittee may petition to have the monitoring requirements modified,
reduced, or eliminated only after 10 valid monitorial events for 10 different storm
event have been submitted for the system, during the course of a full year.
Modification shall be determined on a case-by-case basis.
9. An annual report shall be submitted by March 1 of each year. The report shall
document the inspection, maintenance. and monitoring activities performed
during the previous calendar year, and summarize overall system performance.
The annual report shall be submitted to NCDENR-DWQ, Stormwater and
General Permits Unit, 1617 Mail Service Center, Raleigh, NC 27699-1617,
IV. GENERAL CONDITIONS
1. This permit is not transferable except after notice to and approval by the Director.
In the event of a change of ownership, or a 'name change, the penmittee must
submit a formal permit transfer request to the Division of Water Quality,
accompanied by a completed name/ownership change form, documentation from
the parties involved, and other supporting materials as may be appropriate. The
approval of this request will be considered on its merits and may or may not be
approved. The permittee is responsible for compliance with all permit conditions
until such time as the Division approves the transfer request.
NOV.20.2006 1:18PM NCDENR WIRO NO.524 P.11
State Storm- 'ter Management Systems
Permit N. _ SW8 900421 Modification
2. Failure to abide by the conditions and limitations contained in this permit may,
subject the Permittee to enforcement action by the Division of Water Qual'y in
accordance with North Carolina General Statute 143-215.6A to 143-215.6C.
3. The Issuance of this permit does not preclude the Permittee from complying with
any and all statutes, rules, regulations, or ordinances which may be Imposed by
other government agencies (local, state, and federal) which have jurisdiction.
4. In the event that the facilities fail to perform satisfactorily, including the creation of
nuisance conditions, the Permittee shall take immediate corrective action,
including those as may be required by this Division, such as the construction of
additional or replacement stormwater management systems.
5. The permittee grants DENR Staff permission to enter the property during normal
business'hours for the purpose of inspecting all components of the permitted
stormwater management facUity.
6. The permit may be modified, revoked and reissued or terminated for cause. The
filing of a request for a permit modification, revocation and reissuance or
terrnination does not stay any permit condition. ,
7. Unless specified elsewhere, permanent seeding requirements for the stormwater
control must follow the guidelines established In the North Carolina Erosion and
Sediment Control Planning and Design Manual.
B. Approved plans and specifications for this project are incorporated by reference
and are enforceable parts of the permit.
9. The permittee shall notify the Division any name, ownership or mailing address
changes within 30 days.
Permit issued this the 2nd day of September, 2003. ,
NORTH CAROLINA ENVIRONMENTAL MANAGEMENT COMMISSION
r Az D A
I-On Alan Klimek ,-P.E; Director
Division of Water Quality
BY Authority of the Environmental Management Commission
10

-
t-,aclnmexnk C-AIL
0
1:19PM NCDENR WIRO NO.524 P.12
OFFICF USE ONLY
Date Received Fee Paid 13..,,.14,,.
Ole;
State of North Carolina
Department of Environment and Natural Resources
Division of Water Quality
STORMWATER MANAGEMEN'X' PF T APPLXCATxON FORM
This form may be photocopied for use as an original
1. G1ENERAL INFORMATION:
1. Applicant's name (specify the name of the corporation, individual, etc. who owns the project):
2. Print Owner/ Signing Official's name and title (the person legally responsible for facility and compliance):
William A. Ambrose, Executive Vice-President
3. Mailing Address for person listed in item 2 above:
10 South Cardinal Drive, PO Box 3227
City: _wilmington state: NC
Zip: 28446
Telephone Number: 910-769-2442
4. Project Name (subdivision, facility, or establishment name - should be consistent with project name on plans,
specificati ns, letters, operation and maintenance agreements, etc.):
S. Location of Pxojeet (street address):
of US 421 and YTS 11
City:
County: New Hanover
6. Directions to project (from nearest major intersection):
The intersection of US 421 and US 117
7. Latitude: _ 77 degrees 57' 10" W Longitude: 34 degrees 1S' 10" N
of project
8. Contact person who can answer questions about the project:
Name: Gregory J. Hetzler, PE Telephone Number: [phone]
II. PERMff INFORMATION;
1. Specify whether project is (check one): New Renewal X Modification
Form: SWU-101 Version 3.99
S:1083710011140 PermitslStormw4ter Mgmt Permit .doe Page 1 of 4

M
NOV.20.2006 1:19PM NCDENR WIRO N0.524 P.13
Receiving Stream Name Ca Fear Cape Fear
Receiving Sircam Class C, NSW C. NSW
Drainage Area 1.36 so (59,259 sp 0,02 ac (800 af)
Existing Impervious Area
Proposed Impervious Area 1,36 0.02
Impervious Area 100 100
On-7
7
On-
Qt?-
1. 59 2.'i R40 Ai&- bQ
On-site Sidewalks
Other on-site
Off-site
Total: 592 AOL., Total: Z 00
Receiving Suram Name Cape Fear Cape Fear
Receiving Sir= Class C, NSW C, NSW
Arainage Area A- 0.12 ac (3434st) 5220 0.03 so (+ff-at) jq<V
Bxisting hupervious Area
Proposed Impervious Area 5220 W
!Pemous Ares, 100 100
On-site Buildings
On-site Streets
On-site Parldug ' 5,210 A40- 42*4 1
Ou-sits Sidewalks
Other on-site
Off'-site
Total: S 220 AA., Total: PEV-P 1 400 AV-
Impervious area is defined w the built upon area including, but not Knifed to, buildings. roads, parking areas,
Sidewalks, gravel areas, etc.
7yp?'c.21 ch s I i'cz}?bn en 9-2.03 b moth up Ib
dr2ina??rd,?,s ?? cal?u(2?'vn5.

NOV.20.2006 1:19PM NCDENR WIRO NO.524 P.14
Receiving stream Nano Cape Fear Cape Fear
Receiving Stream Class C NSW C, NSW
Drainage Area. 0.03 no (1,250 efl 0.36 ac
sfl15 ?
Existing Impervious Area
Pr
oposed bWervions Area
-146 , tZQO
44 .3
en
vious Area
% 100 100
iags
ts
ng
70n-sSidewaW
alks

Total;
I
MPervtous area is defined as the built upon area including, but not limited to, b uildings. roadg_ mrklno .,"aw
McWautc, gravel areas, do.

NOV.20.2006 1:19PM NCDENR WIRO NO.524 P.15
Receiviug Stream Name e Fear
7
ing stream class C, NSW
ge Area 0,06 ac (;s;$#-si)
j
Existing Impervious Area
Pr osed Impervious Area 1 4 ,0(v +-M-
% Impervious Area 100
On-site Buildings
On-site Streets
On-site Parking
On-site Sidewalks
Other on-site
o$-site
Total: Total:
*fmDerVlOUS area is defined as the built upon area including. but not limited to. b uildino. roads rarklniz area.
sidewalks, gravel areas, etc.
1 NOV.20.2006 1:20PM NCDENR WIRO
NO. 524 P.16
7: How was the off-site impervious area listed above derived? NIA
M_ DEED RESTRICTIONS AND PROTECTIVE COVENANTS
The following italicized deed restrictions and protective covenants are required to be recorded for all subdivisions,
outpareels and future development prior to the sale of any lot. If lot sizes Vary significantly, a table listing each lot
number, size and the allowable built upon area for each lot must be provided as an attachment.
1. The following covenants are intended to ensure ongoing compliance with state sior mwater management
permit number as issued by the Division of Water Quality.
These covenants may not be changed or deleted without the consent of the State.
Z No more than square feet of any lot shall be covered by structures or impervious
mater'ials..Impervious materials include asphalt, gravel, concrete, brick, stone, slate or similar material
but do not include wood decking or the water surface of swimming pools
3. S vales shall not be filled in, piped, or altered except as necessary to provide driveway crossings.
4. Built-upon area in excess of the permitted amount requires a state stormwater management permit
modification prior to construction.
5. All permitted rune from outparcels or future developments shall be directed into the permitted
stormwater control system. These connections to the stormwater control system shall be performed in a
manner that maintains the integrity and performance of the system as permitted.
By your signature below, you certify that the recorded deed restdction5 and protective covenants for this project
sball include all the applicable items required above, that the covenants will be binding on all parties and persons
claiming under them, that they will run with the land, that the required covenants cannot be changed or deleted
without concurrence from the State, and that they will be recorded prior to the sale of any lot.
V. SUPPLMVWT FORMS
The applicable state stormwater management permit supplement form(s) listed below must be submitted for each
BUT specified for this project. Contact the Stormwater and General Permits Unit at [phone] for the status
and availability of these forms.
Form SWU-102
Form SWU-I03
Form SWU-104
Form SWU'-I05
Form SWU 106
Form SWU-107
Form SWU-108
Form SWY.] 109 In
Wet Detention Basin Supplement
Infiltration Basin Supplement
Low Density Supplement
Curb Outlet System Supplement
Off-Site System Supplement
Underground Infi4tration Trench Supplement
Neese River Basin Supplement
novative Best Management Practice Supplement
VI. SUBMITTAL REQUIItEMEMS
Only complete application packages will be accepted and reviewed by the Division of Water Quality
(DWQ). A complete package includes all of the items listed below. The complete application package
should be submitted to the appropriate DWQ Regional Office.
Form: SWU-101 version 3.99
S:1083710011140 Permits\Stormwater Mgmt Permit .doc Page 3 of 4
NOV.20.2006 1:20PM NCDENR WIRO

• Original and one, copy of the Stormwater Management Permit Application Form
NO. 524 P.17
7. Please indicate that you have provided the following required information by initialing in the space provided
next to each item.
Initials
• One copy of the applicable Supplement Form(s) for each BMP
• Permit application processing fee of 5420 (payable to NCDENR)
• Detailed narrative description of stortnwater treatment/ management:
Two copies of plans and specifications, including:
- Development/Project name ?
Engineer and fm /
- Legend ?
-North arrow /
- Scale /
- Revision number & date
- Mean high water line r
- Dimensioned property/ project boundary J'
- Location trap with named streets or NCSR numbers r'
- Original contours, proposed contours, spot elevations, finished floor elevations ?
- Details of roads, drainage features, collection systems, and atormwater control measures
- Wetlands delineated, or a note on plans that none exist peo'
- Existing drainage (including off-site), drainage easements, pipe sizes, runoff calculations
- Drainage areas delineated ?
Vegetated buffers (where required) r
V M AGENT AUTHORMAITON V

./
If you wish to designate authority to another individual or firm so that they may provide information on your
behalf please complete this section:
Designated agent (individual or firm): McKim & Creed, P. A.
Mailing Address: 243 N. Ikont Street
City: womington , - State: NC Zip: 28401
Phone: _ [phone] Fax: [phone]
VIU. AMICANTIS CERTIFICATION
I, (print or type name ofperson listed in CeneralInformation, item 2) W 11I 2M A. Alnbros_
certify that the information included on this permit application form is, to the best of my knowledge, correct and
that the project will be constructed in conformance with the approved plans, that the required deed restrictions
and protective coven is will be recorded, and that the proposed project complies with the requirements of 15A
NCAC 2H.1000. -A
Signature:
e
Date: f, 7. & %...

Form: SWU-101 Version 3.99
S:\0837\0011\40 Permits\Stormwater Mgmt Permit doe • Page 4 of 4