SW8981129_Historical File_19981210

State of North Carolina
Department of Environment
and Natural Resources
Wilmington Regional Office
James B. Hunt, Jr., Governor
Wayne McDevitt, Secretary
Division of Water Quality
Mr. Leo Nowak, Member/Manager
Nowak & Warwick, L.L.C.
2524 Independence Blvd.
Wilmington, North Carolina 28412
Dear Mr. Nowak:
A W&WW
NCDENR
NORTH CAROLINA DEPARTMENT OF
ENVIRONMENT AND NATURAL RESOURCES
December 10, 1998
Subject: Permit No. SW8 981129
Flow Serve
High Density Stormwater Project
Brunswick County
The Wilmington Regional Office received the Stormwater Management Permit Application for Flow Serve on November
18, 1998. Staff review of the plans and specifications has determined that the project, as proposed, will comply with the
Stormwater Regulations set forth in Title 15A NCAC 2H.1000. We are forwarding Permit No. SW8 981129 dated December
10, 1998, for the construction of Flow Serve.
This permit shall be effective from the date of issuance until December 10, 2008, and shall be subject to the conditions and
limitations as specified therein. Please pay special attention to the Operation and Maintenance requirements in this permit.
Failure to establish an adequate system for operation and maintenance of the stormwater management system will result in
future compliance problems.
If any parts, requirements, or limitations contained in this permit are unacceptable, you have the right to request an
adjudicatory hearing upon written request within thirty (30) days following receipt of this permit. This request must be in
the form of a written petition, conforming to Chapter 150B of the North Carolina General Statutes, and filed with the Office
of Administrative Hearings, P.O. Drawer 27447, Raleigh, NC 27611-7447. Unless such demands are made this permit shall
be final and binding.
If you have any questions, or need additional information concerning this matter, please contact Scott Vinson, or me at (910)
395-3900.
Sincerely,
�h Rick Shiver
Water Quality Regional Supervisor
RSS/sav: S:\WQS\STORMWATTERNMV8ll29.DEC
cc: Phil Tripp, P.E.
Delaney Aycock, Brunswick County Inspections
Scott Vinson
Wilmington Regional Office
Central Files
127 Cardinal Dr. Ext., Wilmington, North Carolina 28405 Telephone [phone] FAX [phone]
An Equal Opportunity Affirmative Action Employer 50% recycled/10% post -consumer paper

State Stormwater Management Systems
Permit No. SW8 981129
STATE OF NORTH CAROLINA
DEPARTMENT OF ENVIRONMENT AND NATURAL RESOURCES
DIVISION OF WATER QUALITY
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 GRANTED TO
Nowak & Warwick, L.L. C.
Flow Serve
Brunswick County
FOR THE
construction, operation and maintenance of a Detention Pond in compliance with the provisions of 15A NCAC 2H .1000
(hereafter referred to as the "stormwater rules') and the approved stormwater 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 December 10, 2008 and shall be subject to the following
specified conditions and limitations:
L 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 page 3 of this
permit, the Project Data Sheet. The stormwater control has been designed to handle the runoff from 84,291 square
feet of impervious area.
Approved plans and specifications for this project are incorporated by reference and are enforceable parts of the
permit.
4. The tract will be limited to the amount of built -upon area indicated on page 3 of this permit, and per approved plans.
2

State Stormwater Management Systems
Permit No. SW8 981129
DIVISION OF WATER QUALITY
PROJECT DESIGN DATA SHEET
Project Name:
Flow Serve
Permit Number:
S W8 981129
Location:
Brunswick County
Applicant:
Mr. Leo Nowak, Member/Manager
Mailing Address:
Nowak & Warwick, L.L.C.
2524 Independence Blvd.
Wilmington, North Carolina 28412
Application Date:
November 18, 1998
Water Body Receiving Stormwater Runoff: UT Cape Fear River
Classification of Water Body:
"C Sw"
If Class SA, chloride sampling results:
N/A
Pond Depth, feet:
6.5
Permanent Pool Elevation, FMSL:
36
Total Impervious Surfaces, W:
84,291
Offsite Area entering Pond, ft2:
N/A
Required Surface Area, ft2:
3,829
Provided Surface Area, ft2:
9,633
Required Storage Volume, ft3:
7,123
Provided Storage Volume, ft3:
22,122
Temporary Storage Elevation, FMSL:
38
Controlling Orifice:
1.54 pipe
3

State Stormwater Management Systems
Permit No. SW8 981129
II. SCHEDULE OF COMPLIANCE
1. 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 except roads.
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 limited to:
a. Semiannual scheduled inspections (every 6 months).
b. Sediment removal.
C. Mowing and revegetation of side slopes.
d. Immediate repair of eroded areas.
e. Maintenance of side slopes in accordance with approved plans and specifications.
f. Debris removal and unclogging of outlet structure, orifice device and 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 DWQ.
The records will indicate the date, activity, name of person performing the work and what actions were taken.
5. Decorative spray fountains will not be allowed in the ponds.
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 facility, a certification must be received from an appropriate designer for the system installed certifying
that the permitted facility has been installed in accordance with this permit, the approved plans and specifications,
and other supporting documentation. Any deviations from the approved plans and specifications must be noted on
the Certification.
8. A copy of the approved plans and specifications shall be maintained on file by the Permittee for a minimum of ten
years from the date of the completion of construction.
9. Prior to the sale of any portion of the property, 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 of any portion of
the property.
10. The permittee is responsible for verifying that the proposed built -upon area does not exceed the allowable built -upon
area.
11. The runoff from all built -upon area on the project must be directed into the permitted stormwater control system.
12. 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.
4

State Stormwater Management Systems
Permit No. SW8 981129
The following items will require a modification to the permit:
a. Any revision to the approved plans, regardless of size.
b. Project name change.
C. Transfer of ownership.
d. Redesign or addition to the approved amount of built -upon area.
e. Further subdivision of the project area.
f. Filling in, altering, or piping of any vegetative conveyance shown on the approved plan.
In addition, the Director may determine that other revisions to the project should require a modification to the permit.
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 permittee shall submit a written time
schedule to the Director for modifying the site to meet minimum requirements. The permittee shall provide copies
of revised plans and certification in writing to the Director that the changes have been made.
III. GENERAL CONDITIONS
1. This permit is not transferable. In the event there is a desire for the facilities to change ownership, or there is a name
change of the Permittee, a formal permit request must be submitted to the Division of Water Quality accompanied
by an application fee, 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.
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 Quality, 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 for the purpose of inspecting all components of
the permitted stormwater management facility.
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 termination does not stay any permit condition.
Permit issued this the 10th day of December, 1998.
NORTH CAROLINA ENVIRONMENTAL MANAGEMENT COMMISSION
` -5�C A A 4_X Ate(
A. Preston Howard, Jr., P.E., Director
Division of Water Quality
By Authority of the Environmental Management Commission
Permit Number SW8 981129
5

State Stormwater Management Systems
Permit No. SW8 981129
Flow Serve
Stormwater Permit No. SW8 981129
Brunswick County
Engineer's Certification
I, , as a duly registered Professional Engineer in the State of North Carolina,
having been authorized to observe (periodically/weekly/full time) the construction of the project,
(Project)
for (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.
Noted deviations from approved plans and specification:
Signature
Registration Number
Date
SEAL
0

I.
2
4
6.
7.
8.
II.
State of North Carolina
Department of Environment and Natural Resources
Division of Water Quality
STORMWATER MANAGEMENT PERMIT APPLICATION FORM
This form may be photocopied for use as an original
GENERAL INFORMATION
Applicants name (specify the name of the corporation, individual, etc. who owns the project):
Nowak & Warwick L.L.C.
Print Owner/Signing Official's name and title (the person who is legally responsible for the facility and
its compliance):
Leo Nowak Member/Manager
Mailing Address for person listed in item 2 above:
2524 Indepenence Blvd.
City: Wilmington State: NC Zip: 28412
Telephone Number: [phone]
Project Name (subdivision, facility, or establishment name — should be consistent with project name on
plans, specifications, letters, operation and maintenance agreements, etc.):
Flow Serve
Location of Facility (street address):
Lot 52 Leland Industrial Park
City: Leland County: Brunswick
Directions to facility (from nearest major intersection):
approx 24001f West from the intersection of US Hwy 74/76 and SR 1426 to Mercantile Drive to
eject entrance
Latitude: N34°15'00" Longitude: W78003'30" of facility
Contact person who can answer questions about the facility:
Name: Tripp Engineering1P.C./Phillip G. Triuu Telephone Number: [phone]
PERMIT INFORMATION:
Specify whether project is (check one): X New Renewal Modification
If this application is being submitted as the result of a renewal or modification to an existing permit, list
The existing permit number
Form SWU-101 January 1998 Page 1 of 4
and its issue date (if known)
ItIZI

Specify the type of project (check one):
Low Density X High Density Redevelop General Permit Other
4. Additional Project Requirements (check applicable blanks):
CAMA Major X_ Sedimentation/Erosion Control _ 404 Permit
III. PROJECT INFORMATION
1. In the space provided below, summarize how stormwater will be treated. Also attach a detailed
narrative (one tv two pages) describing storiinw— at r managernent. for the project.
Stormwater detention pond
2. Stormmwater runoff from this project drains to the Cape Fear River basin.
3. Total Project Area: 4.42 acres 4. Project Built Upon Area: 43.8 %.
5. How many drainage basins does the project have? 1
6. Complete the following information for each drainage basin. If there are more than two drainage basins
in the project, attach an additional sheet with the information for each basin provided in the same format
as below.
Receiving Stream Name
Unnamed trib to Cape Fear River
Receiving Stream Class
C-SW
Drainage Basin Area
192,51� sf
Existing Impervious * Area
N/A
Proposed Impervious * Area
84,291 sf
% Impervious* Area (total)
43.8%
On -site Buildings
18,000 sf
On -site Streets
N/A
On -site Sidewalks
1,500 sf
On -site Parking
31,211 sf
Other on -site Future
33,580 sf
Off -site
N/A
Total:
E=84,291 sf
E_
* Impervious area is defined as the built upon area including, but not limited to, buildings, roads, parking
areas sidewalks, gravel areas, etc.
7. How was the off -site impervious area listed above derived? N/A
IV. DEED RESTRICTIONS AND PROTECTIVE COVENANTS
Deed restrictions and protective covenants are required to be recorded for all low density projects and all
subdivisions prior to the sale of any lot. Please see Attachment A for the specific items that must be recorded.
Form SWU--101 January 1998 Page 2 of 4

By your signature below, you certify that the recorded deed restrictions and protective covenants for this project
shall include all the items required by the permit, 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. AGENT AUTHORIZATION
If you wish to designate submittal authority to another individual or firm so that they may provide information
on your behalf, please complete this section:
Designated agent (individual or firm): Tripp Engineering, P.C.
Mailing Address: 507 Chestnut Street
City: Wilmington State: NC Zip: 28401
Phone: [phone] Fax: [phone]
VII. SUBMITTAL REQUIREMENTS
This application package will not be accepted by the Division of Water Quality unless all of the applicable
items are included with the submittal.
Please indicate that you have provided the following required information by signing your initials in the
space provided next to each item.
s Initials
• Original and one copy of the Stormwater Management Permit Application Form
• One copy of the applicable Supplement Form(s) for each BMP (see Attachment A)
• Permit application processing fee (see Attachment A)
• Detailed narrative description of stormwater treatment/management
• Two copies of plans and specifications, including:
- Development/Project name
- Engineer and firm
- Legend
- North arrow
Scale
Revision number and date
Mean high water line
Dimensioned property/project boundary
Location map with named streets or NCSR numbers
Original contours, proposed contours, spot elevations
Details of roads, parking, cul-de-sacs, sidewalks, and curb and gutter
Wetlands delineated, or a note on plans that none exist
Existing drainage (including off -site), drainage easements, pipe sizes, runoff calculations
- Drainage basins delineated
Vegetated buffers (where required)
VI. APPLICANT'S CERTIFICATION
I, (print or type name of person listed in General Information, item 2) Leo Nowak
certify that the information included on this permit application form is correct, that the project will be
constructed in conformance with the approved plans, that the deed restrictions in accordance with Attachment A
of this form will be recorded with all required permit conditions, and that to the best of my knowledge, the
proposed project complies with the requirements of 15A NCAC 2H .1000.
Title:
Form SWU-101 January 1998 Page 3 of 4

ATTACHMENT A
1. Deed Restriction Language
The following statement must be recorded for all low density projects and for all projects that involve the
subdivision and selling of lots or outparcels:
1. No more than _N/A square feet of any lot, including that portion of the right-of-way between the
edge of pavement and the front lot line, shall be covered by impervious structures including asphalt,
gravel, concrete, brick, stone, slate or similar material but not including wood decking or the
surface ofswimming pools. This covenant is intended to insure continued compliance with the
stormwater permit issued by the State of North Carolina. The covenant may not be changed or
deleted without the consent of the State.
2. No one may fill in, pipe, or alter any roadside swale except as necessary to provide a minimum
driveway crossing.
NOTE: If lot sizes vary significantly, the owner/developer must provide an attachment listing each lot
number, size and the allowable built upon area for each lot.
For commercial projects that have outparcels or future development, the following statements must also be
recorded:
3. The connection from the outparcel or future area into the stormwater system must be made into the
forebay such that short-circuiting of the system does not occur.
4. All built -upon area from the outparcel or future development must be directed into the permitted
stormwater control system.
5. Built -upon area in excess of the permitted amount will require a permit modification prior to
construction.
For curb outlet systems, the following statement in addition to items 1 and 2 above must be recorded:
6. No one may pipe, fill in or alter any designated 100 foot long grassed Swale used to meet the
requirements ofNCAC 2H.1008(g).
2. Supplement Forms
The applicable supplement form(s) listed below must be submitted for each BMP specified for this project:
Form SWU-102
Wet Detention Basin Supplement
Form SWU-103
Infiltration Basin Supplement
Form SWU-104
Low Density Supplement
Form SWU-105
Curb Outlet System Supplement
Form SWU-106
Off --Site System Supplement
Form SWU-107
Underground Infiltration Trench Supplement
Form SWU-108
Neuse River Basin Nutrient Management Strategy Supplement
3. Permit Application Fees (check made payable to NCDENR and submitted to the appropriate
Regional Office)
Type of Permit
Low Density
High Density
Other
Director's Certification
General Permit
New, Modification, or
Late Renewal
$225
$385
$225
$350
$ 50
Form SWU-101 January 1998 Page 4 of 4
Timely Renewal Without
Modification
n/a
$225
n/a
n/a
n/a

TF1761ZI
Permit No.G�����/��
(to be provided by DWQ)
State of North Carolina
Department of Environment and Natural Resources
Division of Water Quality
STORT4-WATERM?NACErNT , PER%II'P nDDLiCATION FORM
WET DETENTION BASIN SUPPLEMENT
This form may be photocopied for use as an original
DWO Stormwater Management Plan Review:
A complete stormwater management plan submittal includes a wet detention basin supplement for each basin,
design calculations, plans and specifications showing all basin and outlet structure details, and a signed and
notarized operation and maintenance agreement.
I. PROJECT INFORMATION (please complete the following information):
Project Name: Flow Serve
Contact Person: Phillip G. Tripp, P.E. Phone Number; 910 763-5100
For projects with multiple basins, specify which basin this worksheet applies to:
Basin Bottom Elevation
_ _29.5
ft.
Permanent Pool Elevation
36.0
ft.
Temporary Pool Elevation
38.0
ft.
Permanent Pool Surface Area_9,633 _ sq.ft.
Drainage Area _192,573 _ sq.ft.
Impervious Area _84,291 ,ate 11
Permanent Pool Volume _33,208 cu.ft.
Temporary Pool Volume _22.122 cu.ft.
Forebay Volume 6 787 cu.ft.
SA/DA1 used 0.0230
Diameter of Orifice 1.5 in.
Design TSS Removal 90 %
H. REQUIRED ITEMS CHECKLIST
(average elevation of the floor of the basin)
(elevation of the orifice)
(elevation of the discharge structure overflow)
(water surface area at the orifice elevation)
(on -site and off -site drainage to the basin)
(on -site and off -site drainage to the basin)
(combined volume of main basin and forebay)
(volume detained above the permanent pool)
(surface area to drainage area ratio)
(85% TSS removal required, see item k below)
The following checklist outlines design requirements per the Stormwater Best Management Practices manual
(N.C. Department of Environment, Health and Natural Resources, November 1995) and Administrative Code
Section: 15 A NCAC 2H .1008.
Initial in the space provided to indicate the following design requirements have been met and supporting
documentation is attached. If the applicant has designated an agent in the Stormwater Management Permit
Application Form, the agent may initial below. If a requirement has not been met, attach Justification.
Form SWU-102 Rev 1/August 1998 Page 1 of 3

AppUc is Initials
a. The temporary pool controls runoff from the 1 inch storm event.
b. The basin length to width ratio is greater than 3: 1.
c. The basin side slopes above the permanent pool are no steeper than 3: 1.
Pd. A submerged and vegetated perimeter shelf at less than 6:1 is provided (show detail).
Qe. Vegetation above the permanent pool elevation is specified.
f. An emergency drain is provided to empty the basin.
6.5' g. The permanent pool depth is between 3 and 6 feet (required minimum of 3 feet).
p h. The temporary pool draws down in 2 to 5 days.
i. A trash rack is provided for both the overflow and orifice.
j. The forebay volume is approximately equal to 20% of the total basin volume.
Pk. Sediment storage is provided in the permanent pool.
N/A 1. A 30-foot vegetative filter is provided at the outlet2 (include erosive flow calculations).
Pin. Recorded drainage easement for each basin including access to nearest right-of-way.
n. A site specific operation and maintenance (O & M) plan is provided.
o. A vegetation management/mowing schedule is provided in the O & M plan.
rj () p. Semi-annual inspections are specified in the O & M plan.
C q. A debris check to be performed after every storm event is specified in the O & M plan.
Par. Specific clean -out benchmarks are specified in the O & M plan (elevation or depth).
s. A legally responsible party is designated in the O & M plan3 (include name and title).
t. If the basin is used for sediment and erosion control during construction, clean out of the
basin is specified to be performed prior to use as a wet detention basin.
Footnotes:
1 When using the Division SA/DA tables, the correct SA/DA ratio for permanent pool sizing should be computed based upon the
actual impervious % and permanent pool depth. Linear interpolation should be employed to determine the correct value for non-
standard table entries.
2 The requirement for a vegetative filter may be waived if the wet detention basin is designed to meet 90% TSS removal.
3 The legally responsible party should not be a homeowners association unless more than 50% of the lots have been sold and a
resident of the subdivision has been named the president.
M. WET DETENTION BASIN OPERATION AND MAINTENANCE AGREEMENT
The wet detention system is defined as the wet detention basin, forebay, non-integrated pretreatment
Systems (pretreatment other than forebays), and the vegetated filter if one is provided.
This system (check one) ❑ does �Rdoes not incorporate a vegetated filter.
This system (check one) ❑ does L does not incorporate non-integrated pretreatment.
Maintenance activities shall be performed as follows:
1. After every significant runoff producing rainfall event and at least monthly:
Form SWU-102 Rev 1/August 1998 Page 2 of 3

a. Inspect the wet detention system for sediment accumulation, erosion, trash accumulation, grass
cover, and general condition.
b. Check and clear the orifice of any obstructions such that drawdown of the temporary pool occurs within
2 to 5 days.
2. Repair eroded areas immediately, re -seed as necessary to maintain good vegetative cover, mow vegetative
Cover to maintain a maximum height of six inches, and remove trash as needed.
3. Inspect and repair the collection system (i.e. catch basins, piping, swales, riprap, etc.) quarterly to maintain
proper functioning.
4. Remove accumulated sediment from the wet detention basin system semi-annually or when depth is
reduced to 75% of the original design depth. Removed sediment shall be disposed of in an appropriate
manner and shall not be handled in a manner that will adversely impact water quality (i.e. stockpiling near a
wet detention basin or stream, etc.)
The original design depth is: (0.5'
The sediment removal benchmark depth is:
5. Remove cattails and other indigenous wetland plants when they cover 75% of the basin surface. These
plants shall be encouraged top grow along the basin perimeter.
6_ If the basin must be drained for an emergency or to perform maintenance, the flushing of sediment through
the emergency drain shall be minimized to the maximum extent possible.
7. All components of the wet detention basin system shall be maintained in good working order.
I acknowledge and agree by my signature below that I am responsible for the performance of the above
maintenance procedures. I agree to notify DWQ of any problems with the system or changes in the name of the
project, responsible party, or address.
Print name: Leo Nowak
Address: 1514 Independence Blvd.,Wilmington NC 28412
Phone: [phone]
Title:
Signs
Dates
I, Monica L. Valsi , a Notary Public for the State of _North Carolina_____, County
of New Hanover do hereby certify that Leo Nowack personally
appeared before me this IOth day of November , 19 98_, and acknowledge the
due execution of the forgoing infiltration system maintenance requirements. Witness my hand and official seal,
My commission expires 08/07/01 d31pzp
Form SWU-102 Rev 1/August 1998 Page 3 of 3

STORMWATER SUBMITTAL REQUIREMENTS
DETENTION POND
A. Site Plan
✓
1.
Development/Project Name
2.
Engineer name and firm.
3.
Legend
✓
4.
North Arrow
5.
Location Map with direction, distance to named streets, NCSR numbers.
6.
Scale
�✓
7.
Date
&L
8.
Revision number and date.
9.
Original contours, proposed contours, spot elevations, finished floor
elevations.
�✓
10.
Existing drainage, including off -site. Map of offsite area?
11.
Property/Project boundary lines, dimensioned.
tVIA
12.
Mean High Water Line, if necessary.
t.--
13.
Drainage easements, pipe sizes.
a/
14.
Wetlands delineated, or a note on the plans that none exist.
15.
Details of the road, par , cul- - s, including sideway, t%ffb emd-`�
16.
guaer-•
Drainage area to each pond delineated.
17.
Dimensions of the permanent pool.
N 14 9®2:f5518
Vegetated filter detail if using 85 % TSS. This is NOT a connector ditch.
✓
19.
Dimensions of the -read, parking cul-de-sacs, sidewalks, and curb and
gutter.
20.
Unit footprint with dimensions and concrete wood deck areas noted. for
apartments or condo development.
✓
21.
Forebay at each inlet. Prefer one inlet
✓
22.
Inlets located such that entire pond is used for treatment and no short-
circuiting.
k"�
23.
Pond section with:
Bottom elevation
Permanent pool elevation PP
Storage pool elevation SP
Slopes: 3:1 above permancnt pool
Vegetated shelf @6:1 slope, with begin and end elevations around
pond.
Forebay bottom elevation, 3:1 slopes,
✓
Forebay weir elevation between PP and SP.
24.
Outlet structure detail with trash rack and orifice.
25:
e ec so a pic
br4wTend.

26. A 3:1 L: W ratio has been provided for the pond.
STORMWATER SUBMITTAL REQUIREMENTS
DETENTION POND (cont)
B. Calculations
'✓
1.
85 % 0 90 i TSS Chart noted.
2.
Pond depth.
3.
SA/DA ratio calculation.
✓
4.
Required surface area at permanent pool.
5.
Provided surface area at permanent pool (Based on pond dimensions)
6.
Required volume.
7.
Provided volume.
,/
8.
Orifice size based on provided volume.
/
9.
Engineer seal.
10.
Built -upon area to each pond.
11.
Forebay designed to hold 20 % of the first inch.
12.
Non -erosive flow in the vegetated filter, if using 85 % TSS.
C. Supporting Documentation
f 1. Completed permit application
a. Is the person who signed the landowner or a leasee? Must be
landowner.
b. All sections completely filled in.
+� C. Check signature per .1003 (e). Make sure title is provided.
d. If agent signs, signatory authorization from owner.
e. Wet detention supplement sheet provided.
✓ f. Mailing address & phone of applicant- no C/O.
✓ g. Verify water body classification.
N LA h. Missing
information:
2. Signed Operation and Maintenance Plan (includes all items on DWQ O
& M form.)

11/12/98 98121
PGT FLOW SERVE
Veteririor( Pond
-Total Drainage Area
s , ft.
acres
}92.573
4.
Impervious Area
Larlri use
sq . ft.
acres
ild Bu'
1&,000
4.41
Future Building
18,000
0.41
Asphalt Roadway & Parking
31,211
0.72
Future Asp. Road & Park.
14,080
0.32
Concrete
1,500
0.03
Future Concrete
4 500
tk
TotaL
8,4,291
193
Stormwater Calculations:
I
Qz:
Hydraulic Length (L) = 600 ft.
change in Height (H) = 4 ft.
rc = (0-fmy'''t 12S
Tiff min.
QPRE _ (CPRE) x (6) x (Area)
= 5.59 cfs
(2Posr = PPosr) x (W x (Area)
T2.30 cfs
,,Oil ALO a %,a 'aGR ror L ear J[Orm:
CN = (89 % imp.) + (65)(1-% imp.)
7r
P = 3.30 in- for Z yr, 6 hr storm
S = 1000/CN - 10
3.33
Depth (D)= [P-(0.2)(S)]2 / 1P+(0.8)(S)T
T. M in.
TP = fi43-.SXDXAFB*E QzPosr
l-&1-7 rmm
Pond Size:
Elevation
Surface Area
ft.
Normal Pool
36.00
9,633
Fibod-Pbor
38.00-
tt4W
T a -Bank
3960
14;820-
m of Pool
29.W
W5
Provided Storage:
Vol..w = [(Normal pool SA + Flood SA) / 2]
x (F.P: elev. - N.P: elev.}
22.122-. cu. ft.
TetaM* 22,122 cu, ft.
Q10:
%impervious-= F}.438-
= *.8%
CPRE = U.25
CPosT = (% imp.)(.95)+(1-% imp.)(.25)
0.55
Iz = 5.06 in/hr
110 = 9.307 in/fir
QPRE _ (CPRI) x (110) x (Area)
6.96 cfs
aPosT = (Mposr3 x (fio) x (Area)
M32- cfs
CN = (89)(% imp.) + (65)(1-% imp.)
75-
P = 4.80 im for 10 yr, 6 hr storm
S = 1000/CN - 10
3.33
Depth (D)= [P=(Q.2)Mf I [P+(0.8)(Sy
Z.29r in.
TP= [(43-.5)(E3)(Araa}}/ QTvrosr
28.73- ruin.
Required Surface Area at normal owl:
Pond side slopes: 3 :1
DapkK below M.P.L 6.5 iL
for calculated Density and given depth,
SA/DA = 0.0230
chart for 90% TSS Remover for~
SA-= (SAQA}x-(Tota4-Dm9nageArea)-
4 429 sq, ft.
State Store a Required For first 1' of runoff:
Vol. 1(1/12) x (DA) x (% imp.)] +
[(}FFZ}* (DA) x (1-WkY f .)-* C}
Q = 0.25
= 9,280 cu.ft. : MWATER
D E C E I V E
NOV 181998 U

11/12/98
PGT FLOW SERVE
EMentPon Pond
Size Outlet Pipe for 2-day drawdown: Size Outlet Pipe for 5-day drawdown:
for 1st 1" of stormwater, for 1st 1" of stormwater,
Q= PROD Vol. / t72,800 sea-(2-days) Q= PRO'D VoLI 432,000 sec. (5-days)
0.128 cfs = 0.051 cfs
Area of pine = 0 / [Cc-' x SQRT(2 x g x h)]
Cd= Q.6-
g = 322 IL 1s-
h = (F.P. elev.- N.P. elev.) /2
1 ft.
A = a 8266- sq. ft-.
DIA. Of pipe = SQRT[(A x 4) / pi]
or.IM It.
= 2:2t im
Outlet Structure Check-
ing a W x 4' Basin,
Perimeter(L) = 16- It
Q = CIA
C = (% imp)(95) + (1-% imp.)(.25)
0.55
1 = 6.3 in. for a 10 yr. Storm
A= C.42-Acres
15.32 cfs-
Q= CwxLxH15
H = [Q / (Cw x L)ff
Cw = 3-
GA7 9.
Peak elevation = flood pool elevation+ H
38.47 ft.
Forebav:
Required Volume
Vol. = 20% of Required state storage volume
t,85fi cu_fL
Provided Volume
A= Q/[CdxSQRT(2xgxh)]
Cd = O:G
9 = 322 ftis`
h = (F.P. elev. - N.P. elev.) / 2
A-= 0.0-1-06 sq, &
DIA. _ SQRT[(A x 4) / pi]
= O:TTB4-ff.
1-.40- irr.
Normal Pool SA = 3,025 sq. ft.
BottnmSA= 1= ft_
Vol. _ [(N.P. SA + Bat. SA) / 2] x (N.P. el. - Bat. el.)
6,787 cu. ft.
depth = 3 ft.
98121

TRIPP ENGINEERING, P.C.
507 Chestnut Street
Wilmington, North Carolina 28401
Phone: [phone] • Fax: [phone]
November 17, 1998
NCDENR
Division of Environmental Management
Water Quality Section
127 Cardinal Drive
Wilmington, NC 28405-3845
Attn: Ms. Linda Lewis
Re: Flow Serve
Brunswick County, NC
TE 98121
Dear Linda:
NOV 181999
N0�
STORMWATER
Enclosed please find two (2) sets of plans, one (1) signed original and one (1)
copy of the application form including narrative, and one (1) wet detention basin
supplement, two sets of sealed calculations and one check for the application fee.
Please review for approval and contact us with any questions or comments. Thank
you.
Sincerely,
Tripp Engineering, P.C.
041.
Phillip G. Tripp, P.E.
PGT:jss
Enc.

0.00
11124/2006
JWH
Flow Serve Expansion
Pond Calculations
06098
Total Drains a Area
ft.
acres
283,226
6.50
Impervious Area
Land Use
I sq.ft.
acres
Existing buildings
18,000
0.41
Proposed buildings
18,000
0.41
Future
55,000
1.26
Existing concrete
1,500
0.03
Proposed concrete
2,069
0.05
Existing Asphalt
31,211
0.72
Proposed Asphalt
32,346
0.74
Total
1 158,126
3.63
Stormwater Calculations:
Time of Concentration:
Hydraulic Length (L) = 500 ft.
change in Height (H) = 3 ft.
Tc = (Lo /H).dno 1128
6.71 min.
Flow for 2 year, 6 hour Storm (QO:
QPRE _ (CPRE) x (110) x (Area)
6.91 cis
QPOST= (CPOSr) x (110) x (Area)
17.96 cis
soil storage capacity Tor z year storm:
CN = (98)(% imp.) + (60)(1 % imp.
82
P = 3.30 in. for2yr, 6 hr storm
S = 1000/CN -10
2.20
Depth (D)= [P-(0.2)(S)1` I [P+(0.8)(S)l
Time to Peak Flow:
TP = [(43.5)(D)(Area)1/ Q2.Post'
25.49 min.
Detention Pond Design:
Pond Sip•
Elevation
ft.)
Surface Area
(sq. ft.
Normal Pool
36.00
9,633
Flood Pool
38.00
12,489
To of Bank
39.50
14,820
Bottom of Pool
29.50
585
% impervious = 0.558
= 55.8%
say 55.0%
CPRE = 0.25
CPosr= (% imp.)(.95)+(1 % imp.)(.25)
0.65
12 = 4.25 in/hr
Ito = 4.92 in/hr
Flow for 10 year, 6 hour Storm (Q10):
QPRE _ (CPRE) x (125) x (Area)
8.00 cfs
QPosr = (CPosr) x (125) x (Area)
= 20.79 cis
CN = (98)(9,6 imp.) + (60)(1-% imp.)
= 82
P = 4.82 in, for 10 yr, 6 hr storm
S = 1000/CN -10
2.20
Depth (D)= [P-(02)(S)]2I [P+(0-8)(S)l
2.92 in.
Time to Peak Flow:
TP = [(43.5) (D) (Area)]/ Q1ayosT
= 39.70 min.
state surtace Area Kequirement at normal poor
Pond side slopes = 3 :1
Deoth below N.P. = 6.5 ft.
(Chart for 90% TSS Removal for Wet Detention
Required SA = (SAIDA) x (Total Drainage Area)
= 7,364 sq. ft.
State Volume Required for Storage of first 1" of runoff:
Rv = .05+ .009(% imp)'
= 0.552473
V= (Design rainfall)(Rv)(Drainage Area)
Provided Storage Volume: = 13,040 cu. ft.
Vol. _ [(Normal pool SA + Flood Pool SA) 121
x (F.P. elev. - N.P. elev.)
22,122 cu. ft. % �'� ...CA/?O!,#o*
�.` O••.•0 ESS/p /2 ��
r` •' �' �' '� 'o
SEAL
b = 17374OV
4
1
If l• I1����,
'�• ORE
Ot
06098pond 1 oft�,�"��

0.89
11/24/2006 Flow Serve Expansion
JWH Pond Calculations
Pond Volume:
Bottom SA = 585 sq. ft.
Normal Pool SA = 9,633 sq. ft.
Vol. _ [(N.P. SA + Bottom SA) / 2] x (N.P. at. - Bottom el.)
33,209 cu. it _ — _---
Foreba :
Required Volume
Vol. = 20% of storage volume
6,642 cu. ft.
Outlet Structure Desion:
Flow for 2-day drawdown:
for 1st 1" ofstormwater,
Q = Required Vol.1172,800 sec. (2-days)
0.075 cfs
Required Area of Pipe for 2-day drawdown:
A= Q/[CdxSQRT(2xgxh)]
Cd = 0.6
g = 32.2 ftJs°
h = (F.P. elev: N.P. elev.) /2
A= 0.0157 sq. ft.
Diameter of Pioe for 2-dav drawdown:
DIA. = SQRT[(A x 4) / pl]
0.1413 ft
1.70 in.
*Use:1.5 in diameter pipe
Outlet Structure Check:
Using a 4' x 4 Basin,
Perimeter L = 16 ft.
Q = CIA
C = (% imp.)(.95) + (1-% imp.)(.25)
0.65
1= 4.92 in. for a 25 yr. Stone
A = 6.50 Acres
— 20.79 cis
Q= CwxLxH
H = [Q / (Cw x L)]"'
Cw = 3
0.57 ft.
Peak elevation = flood pool elevation + H
38.57 ft.
Provided Volume
Bottom SA = 1,500 sq. ft.
Normal Pool SA = 3,025 sq. fL
Vol. _ [(N.P. SA+ Bottom SA) 121 x (N.P. el. - Bottom el.)
6,788 cu. ft.
Flow for 5-day drawdown:
for 1st 1" of stormwater,
Q = Required Vol. / 432,000 sec. (5-days)
= 0.030 cis
Required Area of Pipe for 5-day drawdown:
A= Q/ [Cd x SQRT(2 x g x h)]
Cd = 0.6
9 = 32.2 ftJs`
h = (F.P. elev. - N.P. elev.) / 2
A = 0.0063 sq. ft.
Diameter of Pipe for 5-day drawdown:
DIA. = SQRT[(A x 4) / pi]
0.0893 ft.
1.07 in.
06098
06098pond 2 of 2

0.00
11/24/2006
JWH
Flow Serve Expansion
Pond Calculations
06098
Total Drainage Area
sq. ft.
acres
283,226
6.50
Impervious Area
Land Use
I soft.
I acres
Existing buildings
18,000
0.41
Proposed buildings
18,000
0.41
Future
55,000
1.26
Existing concrete
1,500
0.03
Proposed concrete
2,069
0.05
Existing Asphalt
31,211
0.72
Proposed Asphalt
32,346
0.74
Total
1 158,126
1 3.63
Stormwater Calculations:
Time of Concentration:
Hydraulic Length (L) = 500 ft.
change in Height (H) = 3 ft.
Tc = (L' /I )-J° / 128
6.71 min.
Flow for 2 year, 6 hour Storm (OD:
QPRE _ (CPRE) x (I10) x (Area)
= 6.91 cfs
QPosr = (CPosr) x (6) x (Area)
17.96 cfs
Soil Storage Capacity for 2 year Storm:
CN = (98)(% imp.) + (60)(1 % imp.)
82
P = 3.30 in. fo2yr, 6 hr storm
S = 1000/CN -10
2.20
Depth (D)= [P-(0.2)(S)]` / [P+(0.8)(S)]
1.62 in.
Time to Peak Flow:
TP = [(43 . 5)(D)(Area)] / Q2.Posr
25.49 min.
Detention Pond Design:
Pond Size:
Elevation
ft.
Surface Area
s . ft.
Normal Pool
36.00
9,633
Flood Pool
38.00
12,489
Top of Bank
39.50
14,820
Bottom of Pool
29.50
585
% impervious = 0.558
= 55.8%
say 55.0%
CPRE = 0.25
CPosT= (% imp.)(.95)+(1-% imp.)(.25)
0.65
12 = 4.25 in/hr
Ito = 4.92 in/hr
Flow for 10 year, 6 hour Storm (Q10):
QPRE _ (CPRE) X (125) X (Area)
8.00 cfs
QPosT = (CPosT) X (lu) x (Area)
= 20.79 cfs
Sou Storage uapacity for i u year Storm:
CN = (98)(% imp.) + (60)(1 % imp.)
= 82
P = 4.82 in, for 10 yr, 6 hr storm
S = 1000/CN -10
2.20
Depth (D)= [P-(0.2)(S)]21 [P+(0.8)(S)]
2.92 in.
Time to Peak Flow:
TP = [(43.5)(D) (Area)]/ Q10yosr
= 39.70 min.
State Surface Area Requirement at normal pool:
Pond side slopes = 3 :1
Depth below N.P. = 6.5 ft.
SA/DA = 0.0260
(Chart for 90% TSS Removal for Wet Detention
Pond without Vegetative Filter
Required SA = (SA/DA) x (Total Drainage Area)
= 7,364 s . ft.
State Volume Required for Storage of first 1" of runoff:
Rv = .05+ .009(% imp)'
= 0.552473
V= (Design rainfall)(Rv)(Drainage Area)
Provided Storage Volume: = 13,040 cu. ft.
Vol. _ [(Normal pool SA + Flood Pool SA) / 2]
x (F.P. elev. - N.P. elev.) NO%J11�1eBl��IBO
22,122 cu. ft. gyp! .� k CA/jo SA
©% Q0606eacosog.. �®
00 �o�,. oF�ssso�'�s2 �o
40
SEAT.
�7374 40
OR ; toffy``
110
06098pond 1 of 2

0.89
11/24/2006 Flow Serve Expansion
JWH Pond Calculations
Pond Volume:
Bottom SA = 585 sq. ft.
Normal Pool SA = 9,633 sq. ft.
Vol. _ [(N.P. SA + Bottom SA)12] x (N.P. el. - Bottom el.)
33.209 cu. ft.
Foreba :
Required Volume
Vol. = 20% of storage volume
6,642 cu. ft.
Outlet Structure Design:
Flow for 2-day drawdown:
for 1 st V of stormwater,
Q = Required Vol. / 172,800 sec. (2-days)
0.075 cfs
Required Area of Pipe for 2-day drawdown:
A= Q/ [Cd x SQRT(2 x g x h)]
Cd = 0.6
g = 32.2 ft./s`
h = (F.P. elev.- N.P. elev.) /2
1 ft.
A = 0.0157 sq. ft.
Diameter of Pioe for 2-dav drawdown:
DIA. = SQRT[(A x 4) / pi]
= 0.1413 ft.
1.70 in.
"Use: 1.5 in diameter pipe
Outlet Structure Check:
Using a W x 4' Basin,
Perimeter L = 16 ft.
Q = CIA
C = (% imp.)(.95) + (1-% imp.)(.25)
0.65
1= 4.92 in. for a 25 yr. Storm
A = 6.50 Acres
20.79 cfs
Q= CwxLxH
H = [Q / (Cw x L)]y'
Cw = 3
0.57 ft.
Peak elevation = flood pool elevation + H
38.57 ft.
Provided Volume
Bottom SA = 1,500 sq. ft.
Normal Pool SA = 3,025 sq. ft.
Vol. _ [(N.P. SA + Bottom SA) / 2] x (N.P. el. - Bottom el.)
6.788 cu. ft.
Flow for 5-day drawdown:
for 1st 1" of stormwater,
Q = Required Vol.1432,000 sec. (5-days)
0.030 cfs
Required Area of Pipe for 5-day drawdown:
A= Q/ [Cd x SQRT(2 x g x h)]
Cd = 0.6
g = 32.2 ft-Is'
h = (F.P. elev. - N.P. elev.) / 2
A = 0.0063 sq. ft.
Diameter of Pipe for 5-day drawdown:
DIA. = SQRT[(A x 4) / pi]
0.0893 ft.
= 1.07 in.
06098
06098pond 2 of 2

November 18, 1998
Re: Flow Serve.
Lot No. 52 Leland Industrial Park
Brunswick County, NC
TE 98121
Stormwater Narrative
Lots No. 52 of Leland Industrial Park contains a total area of 4.42 acres. Construction of an
18,000 sf building with asphalt parking and access area of 31,211 sf is proposed at this time.
Additional future building and asphalt parking areas are used in the calculations. These areas are
18,000 sf and 14,0$0 respectively.
Runoff from this site will be routed through a detention pond and outflow into a proposed
drainage ditch. Calculations show that the pond is sized to contain the State's 1" requirement as well
as provide removal of 90% T.S.S.
Form SWU-101 January 1998 Page 1 of 4