SW8070319_Historical File_20080218

Michael F. Easley, Governor
William G. Ross Jr., Secretary
North Carolina Department of Environment and Natural Resources
Coleen H. Sullins Director
Division of Water Quality
February 18, 2008
Robert E. Huckabee, III, Manager
Cape Fear Investment and Development, LLC
1611 Castle Hayne Road, Building B
Wilmington, NC 28401
Subject: Stormwater Permit No. SW8 070319MOD
Ferguson Distributors
High Density Subdivision Project
New Hanover County
Dear Mr. Huckabee:
The Wilmington Regional Office received a complete Stormwater Management Permit Application for
Ferguson Distributors on February 11, 2008. 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 070319MOD, dated February 18, 2008, for
the construction of the project, Ferguson Distributors.
This permit shall be effective from the date of issuance -wntil August 8, 2017, and shall be subject to the
conditions and limitations as specified therein. Please p, special attention to the Operation and
Maintenance requirements in this permit. Failure to estabii�h an adequate system for operation and
maintenance of the stormwater management system will reult 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 writteo � r aquest within sixty (60) 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 matte:, please contact Chris
Baker, or me at [phone].
Sint�,
,
Edward Beck
Regional Supervisor
Surface Water Protection Section
ENB/csb: S:\WQS\STORMWATER\PERMIT\070319MOD.feb08
cc: Jeffrey B. Petroff, Coastal Land Design, PLLC
New Hanover County Inspections
City of Wilmington Stormwater Services
New Hanover County Engineering
Chris Baker
Wilmington Regional Office
Central Files None Cazolina
turall6f
North Carolina Division of Water Quality 127 Cardinal Drive Extension Wilmington, NC 28405 Phone [phone] Customer Service
Wilmington Regional Office Internet: www.ncwatMualitv.org Fax [phone]
An Equal Opportunity/Affirmative Action Employer— 50% Recycled/10% Post Consumer Paper

State Stormwater Management Systems
Permit No. SW8 070319MOD
STATE OF NORTH CAROLINA
DEPARTMENT OF ENVIRONMENT AND NATURAL RESOURCES
DIVISION OF WATER QUALITY
STATE STORMWATER MANAGEMENT PERMIT
HIGH DENSITY SUBDIVISION 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
Jeffrey M. Stokley, Cape Fear Investment and Development, LLC
Ferguson Distributors
3881 US HWY 421 North, New Hanover County
FOR THE
construction, operation and maintenance of a wet 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 August 8, 2017 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 in Section 1.6 on page 3 of this permit.
3. Approved plans and specifications for this project are incorporated by reference
and are enforceable parts of the permit.
4. The runoff from all built -upon area within the permitted drainage area of this
project must be directed into the permitted stormwater control system.
5. Each lot within the subdivision whose ownership is not retained by the permittee,
must submit a separate Offsite Stormwater Management Permit application
package to the Division of Water Quality and receive a permit prior to any
construction on the lot.
Page 2of8

State Stormwater Management Systems
Permit No. SW8 070319MOD
6. The following design elements have been permitted for this wet detention pond
stormwater facility, and must be provided in the system at all times.
a.
Drainage Area, acres:
13.84
Onsite, ft2:
602,992
Offsite, ft2:
None
b.
Total Impervious Surfaces, ft2:
382,411
c.
Pond Depth, feet:
6
d.
TSS removal efficiency:
90%
e.
Design Storm, inches:
1.5
f.
Permanent Pool Elevation, FMSL:
14.5
g.
Permitted Surface Area @PP ft2:
34,023
h.
Permitted Storage Volume, fts:
47,096
i.
Storage Elevation, FMSL:
15.73
j.
Controlling Orifice:
4" 0 pipe
k.
Permanent Pool Volume, ft3:
141,793
I.
Forebay Volume, ft3:
26,516
m.
Maximum Fountain Horsepower:
1/2
n.
Receiving Stream / River Basin:
Cape Fear River/Cape Fear
o.
Stream Index Number:
15-25-1-9
p.
Classification of Water Body:
"C; Sw"
II. SCHEDULE
OF COMPLIANCE
No homeowner/lot owner/developer shall fill in, alter, or pipe any drainage feature
(such as swales) shown on the approved plans as part of the stormwater
management system without submitting a revision to the permit and receiving
approval from the Division.
2. The permittee is responsible for verifying that the proposed built -upon area for
the entire lot does not exceed the maximum allowed by this permit. Once the lot
transfer is complete, the built -upon area may not be revised without approval
from the Division of Water Quality, and responsibility for meeting the built -upon
area limit is transferred to the individual property owner.
3. If an Architectural Review Board or Committee is required to review plans for
compliance with the BUA limit, the plans reviewed must include all proposed
built -upon area. Any approvals given by the Board do not relieve the homeowner
of the responsibility to maintain compliance with the permitted BUA limit.
4. The permittee shall submit to the Director and shall have received approval for
revised plans, specifications, and calculations prior to construction, for any
modification to the approved plans, including, but not limited to, those listed
below:
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, acquisition, or sale of all or part of the project area.
The project area is defined as all property owned by the permittee, for
which Sedimentation and Erosion Control Plan approval or a CAMA Major
permit was sought.
f. Filling in, altering, or piping of any vegetative conveyance shown on the
approved plan.
Page 3 of 8

State Stormwater Management Systems
Permit No. SW8 070319MOD
5. The Director may determine that other revisions to the project should require a
modification to the permit.
6. All stormwater collection and treatment systems must be located in either
dedicated common areas or recorded easements. The final plats for the project
will be recorded showing all such required easements, in accordance with the
approved plans.
7. 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.
8. 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.
9. During construction, erosion shall be kept to a minimum and any eroded areas of
the system will be repaired immediately.
10. 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.
11. 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.
12. Permanent seeding requirements for the stormwater control must follow the
guidelines established in the North Carolina Erosion and Sediment Control
Planning and Design Manual.
13. The permittee shall at all times provide the operation and maintenance
necessary to assure that all components of the permitted stormwater system
function 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 re -vegetation 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 structures, orifice, catch basins and
piping.
g. Access to all components of the system must be available at all times.
14. 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.
Page 4 of 8

State Stormwater Management Systems
Permit No. SW8 070319MOD
15. This permit shall become void unless the facilities are constructed in accordance
with the conditions of this permit, the approved plans and specifications, and
other supporting data.
16. Prior to the sale of any lot, the following deed restrictions must be recorded:
a. The following covenants are intended to ensure ongoing compliance with
State Stormwater Management Permit Number SW8 070319MOD, as
issued by the Division of Water Quality under NCAC 2H.1000.
b. The State of North Carolina is made a beneficiary of these covenants to
the extent necessary to maintain compliance with the Stormwater
Management Permit.
C. These covenants are to run with the land and be binding on all persons
and parties claiming under them.
d. The covenants pertaining to stormwater may not be altered or rescinded
without the express written consent of the State of North Carolina, Division
of Water Quality.
e. Alteration of the drainage as shown on the approved plans may not take
place without the concurrence of the Division of Water Quality.
f. The maximum built -upon area for this parcel is 285,411. This allotted
amount includes any built -upon area constructed within the lot property
boundaries, and that portion of the right-of-way between the front lot line
and the edge of the pavement. Built upon area includes, but is not limited
to, structures, asphalt, concrete, gravel, brick, stone, slate, coquina and
parking areas, but does not include raised, open wood decking, or the
water surface of swimming pools.
g. Lots within CAMA's Area of Environmental Concern may be subject to a
reduction in their allowable built -upon area due to CAMA regulations.
h. All runoff on the lot must drain into the permitted system. This may be
accomplished through providing roof drain gutters, which drain to the
street, grading the lot to drain toward the street, or grading perimeter
swales and directing them into the pond or street. Lots that will naturally
drain into the system are not required to provide these measures.
i. Built -upon area in excess of the permitted amount will require a permit
modification.
17. A copy of the recorded deed restrictions must be submitted to the Division within
30 days of the date of recording the plat, and prior to selling lots. The recorded
copy must contain all of the statements above, the signature of the Permittee, the
deed book number and page, and the stamp/signature of the Register of Deeds.
18. Prior to transfer of the permit, the stormwater facilities will be inspected by DWQ
personnel. The facility must be in compliance with all permit conditions. Any
items not in compliance must be repaired or replaced to design condition prior to
the transfer. Records of maintenance activities performed to date will be
required.
19. Decorative spray fountains will be allowed in the stormwater treatment system,
subject to the following criteria:
a. The fountain must draw its water from less than 2' below the permanent
pool surface.
b. Separated units, where the nozzle, pump and intake are connected by
tubing, may be used only if they draw water from the surface in the deepest
part of the pond.
c. The falling water from the fountain must be centered in the pond, away from
the shoreline.
Page 5of8

State Stormwater Management Systems
Permit No. SW8 070319MOD
d. The maximum horsepower for the fountain's pump is based on the
permanent pool volume. The maximum pump power for a fountain in this
pond is 1 /2 horsepower.
20. Built upon area includes, but is not limited to, structures, asphalt, concrete,
gravel, brick, stone, slate, coquina and parking areas, but does not include
raised, open wood decking, or the water surface of swimming poois.
III. GENERAL CONDITIONS
1. This permit is not transferable to any person or entity except after notice to and
approval by the Director. In the event there is either a desire for the facilities to
change ownership, or there is a name change of the Permittee, a
"Name/Ownership Change Form" must be submitted to the Division of Water
Quality accompanied by appropriate documentation from the parties involved.
This may include, but is not limited to, a deed of trust, recorded deed restrictions,
Designer's Certification and a signed Operation and Maintenance plan. The
project must be in good standing with DWQ. The approval of this request will be
considered on its merits and may or may not be approved.
2. The permittee is responsible for compliance with all of the terms and conditions
of this permit until such time as the Director approves the transfer request.
3. 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.
4. 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.
5. 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.
6. The permit may be modified, revoked and reissued or terminated for cause. The
filing of a request for a permit modification, revocation and re -issuance or
termination does not stay any permit condition.
7. Permittee grants permission to staff of the DWQ to access the property for the
purposes of inspecting the stormwater facilities during normal business hours.
8. The permittee shall notify the Division of any name, ownership or mailing address
changes within 30 days.
9. 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.
Permit issued this t_ 8th day of February, 2008
NORT AROLINA ENVIRONMENTAL MANAGEMENT COMMISSION
(2,
C;
for Co een H. Sullins, Director
Division of Water Quality
By Authority of the Environmental Management Commission
Page 6 of 8

State Stormwater Management Systems
Permit No. SW8 070319MOD
Ferguson Distributors
Stormwater Permit No. SW8 070319MOD
New Hanover County
Designer's Certification
Page 1 of 2
I, , as a duly registered 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.
The checklist of items on page 2 of this form is a part of this Certification.
Noted deviations from approved plans and specifications:
Signature
Registration Number
Date
SEAL
Page 7 of 8

State Stormwater Management Systems
Permit No. SW8 070319MOD
Certification Requirements: Page 2 of 2
.1. The drainage area to the system contains approximately the permitted
acreage.
2. The drainage area to the system contains no more than the permitted
amount of built -upon area.
3. All the built -upon area associated with the project is graded such that the
runoff drains to the system.
4. All roof drains are located such that the runoff is directed into the system.
5. The outlet/bypass structure elevations are per the approved plan.
6. The outlet structure is located per the approved plans.
7. Trash rack is provided on the outlet/bypass structure.
8. All slopes are grassed with permanent vegetation.
9. Vegetated slopes are no steeper than 3:1.
10. The inlets are located per the approved plans and do not cause short-
circuiting of the system.
11. The permitted amounts of surface area and/or volume have been
provided.
12. Required drawdown devices are correctly sized per the approved plans.
13. All required design depths are provided.
14. All required parts of the system are provided, such as a vegetated shelf, a
forebay, and the vegetated filter.
15. The required dimensions of the system are provided, per the approved
plan.
cc: NCDENR-DWQ Regional Office
New Hanover County Building Inspections
Page 8 of 8

DW USE ONLY
Date Received
Fee Paid
Permit Number
992 , � , z oo
c*VD--,f-1696
�G>�07a3�
State of North Carolina
Department of Er!vron ment and Natural Resources
Division of Water Quality
STORMWATER MANAGEMENT PERMIT APPLICATION FORM
This form may be photocopied for use as an original
I. GENERAL INFORMATION
1. Applicants name (specify the name of the corporation, individual, etc. who owns the project):
Cape Fear Investment & Development, LLC
2. Print Owner/Signing Official's name and title (person legally responsible for facility and compliance):
Robert E. Huckabee, III, Manager
3. Mailing Address for person listed in item 2 above:
1611 Castle Hayne Road, Building B
City:Wibnington State:NC Zip:28401
Phone: (910 ) 359-6036 Fax: (910 ) 395-6605
Email:[e-mail]
4. Project Name (subdivision, facility, or establishment name - should be consistent with project name on plans,
specifications, letters, operation and maintenance agreements, etc.):
Ferguson Distributors
5. Location of Project (street address):
3881 US HWY 421 North
City:Wilmington County:New Hanover
6. Directions to project (from nearest major intersection):
Go west across the Isabel Holmes Bridge. Turn left at the stop light onto 421 North. Project is. on the left just
north of the I40 ramp
7. Latitude:34d 17' 57.85" N Longitude:77d 58' 39.41" W of project
8. Contact person who can answer questions about the project:
Name:Walter "Pete" Avery Telephone Number: 1910 ) 359-6036
Email:[e-mail]
II. PERMIT INFORMATION:
1. Specify whether project is (check one):
UNew
URenewal ®Modification
Form SWU-101 Version 8.07 Page 1 of 4

2: If this application is being submitted as the result of a renewal or modification to an existing permit, list the
existing permit number SW08-070319 and its issue date (if known) N/A
3. Specify the type of project (check one):
❑Low Density ®High Density ❑Redevelop ❑General Permit ❑Universal SMP ❑Other
4. Additional Project Requirements (check applicable blanks):
❑LAMA Major ®Sedimentation/Erosion Control F404/401 Permit ❑NPDES Stormwater
Information on required state permits can be obtained by contacting the Customer Service Center at
1-877-623-6748.
III. PROJECT INFORMATION
1. In the space provided below, summarize how stormwater will be treated. Also attach a detailed narrative
(one to two pages) describing Stormwater management for the project.
Stormwater will be treated by one conventional stormater pond.
2. Stormwater runoff from this project drains to the Cane Fear River basin.
3. Total Site Area: 13.84 acres 4. Total Wetlands Area: 0 acres
5. 100' Wide Strip of Wetland Area: 0 acres (not applicable if no wetlands exist on site)
6. Total Project Area**:13.84 acres
8. How many drainage areas does the project have?1
7.
Project Built Upon Area:63.42
9. Complete the following information for each drainage area. If there are more than two drainage areas in the
project, attach an additional sheet with the information for each area provided in the same format as below.
Basin Information
Dramage Area 1
Drainage Area 2
Receiving Stream Name
Cape Fear River
Stream Class & Index No.
C;Sw 15-25-1-9
Drainage Area (sf)
602,992 sf
Existing Impervious* Area (so
0 sf
Proposed Impervious*Area (sf)
382,411 sf
% Impervious* Area (total)
63.42%
Impervious* Surface Area
Drainage Area 1
Drainage Area 2
On -site Buildings (sf)
70,365 sf
On -site Streets (sf)
0 sf
On -site Parking (sf)
170,544 sf
On -site Sidewalks (sf)
4,502 sf
Other on -site (sf)
137,000 sf
<----- FUTURE DEVELOPMENT
Off -site (sf)
n/a
Total (sf):
382,411 sf
* Impervious area is defined as the built upon area including, but not limited to, buildings, roads, parking areas,
sidewalks, gravel areas, etc.
**Total project area shall be calculated based on the current policy regarding inclusion of wetlands in the built upon area
percentage calculation.
Form SWU-101 Version 8.07 Page 2 of 4

10. How was the off -site impervious area listed above derived?No off -site impervious area enters site.
IV. DEED RESTRIC:'IONS AND PROTECTIVE COVENANTS
One of the following deed restrictions and protective covenants are required to be recorded for all subdivisions,
outparcels 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.
Form DRPC-1
High Density Commercial Subdivisions
Form DRPC-2
High Density Developments with Outparcels
Form DRPC-3
High Density Residential Subdivisions
Form DRPC-4
Low Density Commercial Subdivisions
Form DRPC-5
Low Density Residential Subdivisions
Form DRPC-6
Low Density Residential Subdivisions with Curb Outlets
By your signature below, you certify that the recorded deed restrictions and protective covenants for this
project shall include all the applicable items required in the above form, 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. SUPPLEMENT FORMS
The applicable state stormwater management permit supplement form(s) listed below must be submitted for each
BMP specified for this project. Contact the Stormwater and General Permits Unit at [phone] for the status
and availability of these forms.
Form SW401-Low Density
Low Density Supplement
Form SW401-Curb Outlet System
Curb Outlet System Supplement
Form SW401-Off--Site System
Off -Site System Supplement
Form SW401-Wet Detention Basin
Wet Detention Basin Supplement
Form SW401-Infiltration Basin
Infiltration Basin Supplement
Form SW401-Infiltration Trench
Underground Infiltration Trench Supplement
Form SW401-Bioretention Cell
Bioretention Cell Supplement
Form SW401-Level Spreader
Level Spreader/Filter Strip/Restored Riparian Buffer Supplement
Form SW401-Wetland
Constructed Wetland Supplement
Form SW401-Grassed Swale
Grassed Swale Supplement
Form SW401-Sand Filter
Sand Filter Supplement
Form SWU-101 Version 8.07 Page 3 of 4

VI. SUBMITTAL REQUIREMENTS
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 Office. (Appropriate office may be found by locating project on the
interactive online map at bq.,;,b2o enr.state.nc.usfsuimsi maps.htnj)
1. Please indicate that you have provided the following required information by initialing in the space provided
next to each item.
Initials
• Original and one copy of the Stormwater Management Permit Application Form
• OriginaI and one copy of the Deed Restrictions & Protective Covenants Form
• Original of the applicable Supplement Form(s) and O&M agreement(s) for each BMP
• Permit application processing fee of $505 ($4,000 for Express) payable to NCDENR
• Calculations & detailed narrative description of stormwater treatment/management
• Copy of any applicable soil report
• Three copies of plans and specifications (sealed, signed & dated), including:
- Development/Project name
Engineer and firm
-Legend
- North arrow
- Scale
- Revision number & date
- Mean high water line
- Dimensioned property/project boundary
- Location map with named streets or NCSR numbers
- Original contours, proposed contours, spot elevations, finished floor elevations
- Details of roads, drainage features, collection systems, and stormwater control measures
- Wetlands delineated, or a note on plans that none exist
- Existing drainage (including off -site), drainage easements, pipe sizes, runoff calculations
- Drainage areas delineated
- Vegetated buffers (where required)
VII. AGENT AUTHORIZATION
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) -Coastal Land Design PLLC
Mailing .Address:PO Box 1172
City:Wilmington State:NC Zip:28402
Phone: (910 ) 254-9333 Fax. (910 ) 254-0502
Email:[e-mail]
VIII. APPLICANT'S CERTIFICATION
I, (print or type name of person listed its General Infortnation, item 2) Robert E. Huckabee, III, Manager
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 covenants r
be recorded, and that the proposed project complies with the requirements of 15A
NCAC 2H .1
Signature:
Date- Z— 9' Z_Oe 13
Form SWU'-101 Version 8.07 Page 4 of 4

Permit Number: '!5 � 70 3 / y
(to be provided by DWQ)
Drainage Area Number:
Wet Detention Basin Inspection and Maintenance Agreement
I will keep a maintenance record on this BMP. This maintenance record will be kept in a
log in a known set location. Any deficient BMP elements noted in the inspection will be
corrected, repaired or replaced immediately. These deficiencies can affect the integrity
of structures, safety of the public, and the removal efficiency of the BMP.
The wet detention basin system is defined as the wet detention basin,
pretreatment including forebays and the vegetated filter if one is provided.
This system (check one):
❑ does ® does not incorporate a vegetated filter at the outlet.
This system (check one):
❑ does ® does not incorporate pretreatment other than a forebay.
Important maintenance procedures:
- Immediately after the wet detention basin is established, the plants on the
vegetated shelf and perimeter of the basin should be watered twice weekly if
needed, until the plants become established (commordy six weeks).
- No portion of the wet detention pond should be fertilized after the first initial
fertilization that is required to establish the plants on the vegetated shelf.
- Stable groundcover should be maintained in the drainage area to reduce the
sediment load to the wet detention basin.
- If the basin must be drained for an emergency or to perform maintenance, the
flushing of sediment through the emergency drain should be minimized to the
maximum extent practical.
- Once a year, a dam safety expert should inspect the embankment.
After the wet detention pond is established, it should be inspected once a month and
within 24 hours after every storm event greater than 1.0 inches (or 1.5 inches if in a
Coastal County). Records of inspection and maintenance should be kept in a known set
location and must be available upon request.
Inspection activities shall be performed as follows. Any problems that are found shall
be repaired immediately.
BMP element:
Potentialproblem:
How I will remediate theproblem:
The entire BMP
Trash/ debris is present.
Remove the trash/ debris.
The perimeter of the wet
Areas of bare soil and/or
Regrade the soil if necessary to
detention basin
erosive gullies have formed.
remove the gully, and then plant a
ground cover and water until it is
established. Provide lime and a
one-time fertilizer application.
Vegetation is too short or too j
Maintain vegetation at a height of
long.
I approximately six inches.
Form SW401-Wet Detention Basin I&M-Rev2

Permit Number: yw
(to be provided by DWQ)
Drainage Area Number:
BMP element:
Potentialproblem:
How I will remediate the problem:
The inlet device: pipe or
awale
The pipe is clogged.
Unclog the pipe. Dispose of the
sediment off -site.
The pipe is cracked or
Replace the pipe.
otherwise damaged.
Erosion is occurring in the
Regrade the swale if necessary to
swale.
smooth it over and provide erosion
control devices such as reinforced
turf matting or riprap to avoid
future problems with erosion.
The forebay
Sediment has accumulated to
Search for the source of the
a depth greater than the
sediment and remedy the problem if
original design depth for
possible. Remove the sediment and
sediment storage.
dispose of it in a location where it
will not cause impacts to streams or
the BMP.
Erosion has occurred.
Provide additional erosion
protection such as reinforced turf
matting or riprap if needed to
prevent future erosion problems.
Weeds are present.
Remove the weeds, preferably by
hand. If pesticide is used, wipe it on
the plants rather than spraying.
The vegetated shelf
Best professional practices
Prune according to best professional
show that pruning is needed
practices
to maintain optimal plant
health.
Plants are dead, diseased or
Determine the source of the
dying.
problem: soils, hydrology, disease,
etc. Remedy the problem and
replace plants. Provide a one-time
fertilizer application to establish the
ground cover if a soil test indicates
it is necessary.
Weeds are present.
Remove the weeds, preferably by
hand. If pesticide is used, wipe it on
the plants rather than spraying.
The main treatment area
Sediment has accumulated to
Search for the source of the
a depth greater than the
sediment and remedy the problem if
original design sediment
possible. Remove the sediment and
storage depth.
dispose of it in a location where it
will not cause impacts to streams or
the BMP.
Algal growth covers over
50% of the area.
Consult a professional to remove
and control the algal growth.
Cattails, phragmites or other
Remove the plants by wiping them
invasive plants cover 50% of
with pesticide (do not spray).
the basin surface.
Form SW401-Wet Detention Basin I&M-Rev.2

Permit Number:
(to be provided by DWQ)
Drainage Area Number:
BMP element:
Potentialproblem:
How I will remediate theproblem:
The embankment
Shrubs have started to grow
Remove shrubs immediately.
on the embankment.
Evidence of muskrat or
Use traps to remove muskrats and
beaver activity is present.
consult a professional to remove
beavers.
A tree has started to grow on
Consult a dam safety specialist to
the embankment.
remove the tree.
An annual inspection by an
Make all needed repairs.
appropriate professional
shows that the embankment
needs repair.
The outlet device
Clogging has occurred.
Clean out the outlet device. Dispose
of the sediment off -site.
The outlet device is damaged
Repair or replace the outlet device.
The receiving water
Erosion or other signs of
Contact the local NC Division of
damage have occurred at the
Water Quality Regional Office, or
outlet.
the 401 Oversight Unit at 919-733-
1786.
The measuring device used to determine the sediment elevation shall be such
that it will give an accurate depth reading and not readily penetrate into
accumulated sediments.
When the permanent pool depth reads 6 feet in the main pond, the sediment
shall be removed.
When the permanent pool depth reads 6 feet in the forebay, the sediment shall
be removed.
BASIN DIAGRAM
(fill in the blanks)
Permanent Pool Elevation 14:50
Sediment Removal . 8.50 - r-�ftMin.
en Pool
- - - - - - - - - me Sediment Removal Elevation 8.50 Volume
Bottom Elevatio 7.50 ------------------------------------------ ------ement Bottom Elevation 7.50 1-ft
Storage Sedimei
Storage
FOREBAV MAIN POND
Form SW401-Wet Detention Basin I&M-Rev.2

Permit No.
(to be provided by DWQ)
c3F W A ]'Fq
" 9
NCDENR
STORMWATER MANAGEMENT PERMIT APPLICATION FORM
401 CERTIFICATION APPLICATION FORM
WET DETENTION BASIN SUPPLEMENT
This form must be filled out, printed and submitted.
The Required Items Checklist (Part 1/1) must be printed, filled out and submitted along with all of the required information.
i, PROJECT KFORMAT�
Project name Ferguson Distributors
Contact person Walter "Pete'Avery
Phone number 910-3M036
Date 19-Feb-08
Drainage area number Pond 1
H. DEStG i' It+iFt]RMATIt7N
�
Site Characteristics
Drainage area
602,992
fe
Impervious area
382,411
f?
% impervious
63.41891766
%
Design rainfall depth
1.5
in
Storage Volume: Non -SR Waters
Minimum volume required
46,790
ft3
Volume provided
47,096
ft3
Storage Volume: SR Waters
1-yr, 24-hr runoff depth
in
Pre -development 1-yr, 24-hr runoff
ft3
Post -development 1-yr, 24-hr runoff
ft3
Minimum volume required
ft3
Volume provided
ft
Peak Flow Calculations
Is pre/post control of the 1-yr 24-hr peak flow required?
N
(Y or N)
1-yr, 24-hr rainfall depth
in
Rational C, pre -development
(unitless)
Rational C, post -development
(unitless)
Rainfall intensity: 1 -yr, 24-hr storm
in/hr
Pre -development 1-yr, 24-hr peak flow
if/sec
Post -development 1-yr, 24-hr peak flow
ft3/sec
Pre/Post 1-yr, 24-hr peak flow control
f0/sec
Basin Elevations
Basin bottom elevation
750
ft
Sediment cleanout elevation
850
ft
Bottom of shelf elevation
%00
ft
Permanent pool elevation
14,50
ft
Top of shelf elevation
15.00
ft
Temporary pool elevation
15.73
ft
Volume and Surface Area Calculations
SA/DA ratio
5.37
(unitless)
Surface area at the bottom of shelf
22987.W
ft
Volume at the bottom � of shelf
87546.00
Permanent pool, surface area required
3,2,391
flz
Permanent pool, surface area provided
34,023
if OK
Permanent pool volume
141,793
ft3
Average depth for SA/DA tables
4.167563119
ft OK
Surface area at the top of shelf
38362
f?
Volume at the top of shelf
170757
ft
Form SW401-Wet Detention Basin-Rev.3 Parts I. & II. Design Summary, Page 1 of 2

Permit No.
(to be provided by DWQ)
5ON INFORMATION
Forebay volume
26,516
f
Forebay % of permanent pool volume
19
% OK
Temporary pool, surface area provided
#0;873
fe
Drawdown Calculations
Treatment volume drawdown time
2.2
days OK
Treatment volume discharge rate
0715
ek.
Pre -development 1-yr, 24-hr discharge
9,83
fO/s OK
Post -development 1-yr, 24-hrdischarge
0:43
fO/s OK
Additional Information
Diameter of orifice
4.00
in
Design TSS removal
90
%
Basin side slopes
3
:1
OK
Vegetated shelf slope
1,0
:1
OK
Vegetated shelf width
10
It
OK
Length of flowpath to width ratio
10
:1
OK
Length to width ratio
3
:1
OK
Trash rack for overflow & orifice?
y
(Y or N)
OK
Freeboard provided
35
ft
OK
Vegetated filter provided?
N
(Y or N)
Design must be based on 90% TSS removal
Recorded drainage easement provided?
y
(Y or N)
OK
Capures all runoff at ultimate build -out?
y
(Y or N)
OK
Drain mechanism for maintenance or emergencies
Pumps
Form SW401ANot Detention Basin-Rev.3 Parts I. & II. Design Summary, Page 2 of 2

P. 01
TRANSACTION REPORT
t
t
—
FEB-19-2008 TUE
10:38 AM
%K FOR: NODENR
9103502004
�K
�c
SEND
DATE START RECEIVER
TX TIME PAGES TYPE
NOTE
M# 'DP
FEB-19 10.'33 AM 92540502
4'33" 9 FAX TX
OK :
827
�c
TOTAL
4M 335 PAGES : . ;9
��c��c�c�c�cic�c�c�ct��t�cic�c�tt�c��c�ct�ct�c�c�c�c�c�c�c�c�c�ttt�c�c�c�c�c�c�cttt�c�cttt��c�c�ct��ctt�c�c�c�c�c���ctt�c��ctt�c��cttt�c�c���tt�c��c�c�ct�c
Stato of North Csroun� Rcsanrcgs
ata
tandN
Depattanest of Euv�ron�ona1 OfficeVyiluninvt°
YrOam G. Ross, Jr-, 5ectetnx3'
Micharex F. ,Easley, Gavergor FAX COVER SIOET
D
Date:
Co. / L
d�5�
No. Pages (Owl- cover):
From: 7o Casmer
phone; 910 796-'12��
F=
�•��y c .X t
/'� • A ftmadlve Action &W10y'm
n$i orluniV
ion, WilmingWa. NC 28g05 • (910) 79g.')x15 � An i?q �
127 Cardmal Drix►e Extens

State of North Carolina
Department of Environment and Natural Resources
Wilmington Regional Office
Michael F. Easley, Governor
FAX COVER SHEET
William G. Ross, Jr., Secretary
Date: 2 a No. Pages (excl. cover): U
To: ��`� �ETI�`� From: JoCasmer
Co: CO �5 L G f n c✓ �`5 Phone: [phone]
Fax: s`T ' j!sd Z Fax: [phone]
Re:
127 Cardinal Drive Extension, Wilmington, NC 28405 • [phone] 0 An Equal Opportunity Affirmative Action Employer

Stormwater Narrative
For
Ferguson Distributors
New Hanover County, North Carolina
Prepared by:
Coastal Land Design, PLLC
Civil Engineering/ Landscape Architecture/ Construction Management
P.o.Box 1.172
Wilmington, .SIC 2.8402
Prepared for:
Phonc: 910-254-9333
Fax:[phone]
Cape Fear Investment & Development, LLC
1611 Castle Hayne Road, Building B
Wilmington, NC 28401
pi
February 19, 2008
Ar
��-

Narrative
Proiect Description
This stormwater design is for an approximately 13.84 acre business park off of N.C. Highway 421 in New
Hanover County. This project is a high density stormwater project that uses storm sewers to convey
stormwater to an onsite conventional stormwater pond. This submittal is a modification to previously
approved stormwater permit number SW08-070319. The proposed stormwater pond is designed to meet
both NCDENR's and New Hanover County's stormwater requirements.
Site Description
The topography of the Ferguson Distributors is slightly rolling with mild slopes ranging from 0.5% to 1% and
is heavily vegetated with a thick pine forest. The site ultimately drains to the Cape Fear River 18-(63), a
waterway classified as C:Sw. The elevations on this project ranges from 14 feet MSL to 18 feet. The majority
of the soils, according to the Soil Survey of New Hanover County, are Lakeland sands and Leon sands.
These soils have a soil hydrologic group of A and D respectively. This property is zoned IND-2.
Stormwater Treatment
Storm sewers will be installed to route stormwater to the proposed stormwater pond. This site will be graded
such that stormwater is directed towards inlet boxes where all drainage from impervious surfaces will be
collected and get routed to the proposed stormwater pond. The proposed stormwater pond is designed
according to NCDENR's and New Hanover County's stormwater requirements.
The stormwater pond has been designed to meet NCDENR's capacity analysis as well as New Hanover
County's pre -post requirements. The bleeddown orifice is designed to drain down the first 1.5" of rainfall
within two (2) to five (5) days. The riser elevation is set at 17.65' with a 48"x8" rectangular weir located at the
temporary pool of 15.73', which satisfies New Hanover County's pre -post requirement for the 25 year storm
event. The elevation of the emergency spillway is also at 17.65' with a width of 157 If and is designed so that
New Hanover County's top of dam requirement could be met. With the design conditions set as listed
above, the conventional stormwater pond can safely route the 100-year storm event.

Supplemental Stormwater Calculations
For
Ferguson Distributors
New Hanover County, North Carolina
Prepared by:
Coastal Land Design, PLLC
Civil Engineering / Landscape Architecture / Construction Management
P.O•Box 1172
Wilmington, NC 284.02
Prepared for:
Phone:[phone]
Fax:[phone]
Cape Fear Investment & Development, LLC
1611 Castle Hayne Road, Building B
Wilmington, NC 28401
February 19, 2008
� J:�,�� a �'�•i �+�.e 5;..��`y•

Supplemental NCDENR Project Area Calculation
For
Ferguson Distributors
New Hanover County, North Carolina

NCDENR Project Area Determination
for Stormwater Design
Project Name:.......
Location: ........ .
Date: ...................
Designer: .............
Checker: ..............
File: ....................
iFerguson Distributors
New Hanover County, North Carolina
2/18/2008 7:25
J. Winterwerp, El
J. Carmine, PE
rSite\CaIIcs\f650-03
CLDProjects\650-00 Jeff Stokley\650-03 Hwy 421 Ferguson
NCDENR-Project Area.xls Sheetl
Project Characteristics
Total Site Area (TSA):...................................... 602,992 s.f. ( 13.843 ac. )
Total Wetland Area (TWA) :................................ 0 s.f. (0 ac. )
100' Strip of Wetland Area (SWA):....................... 0 Is.f. (0 ac. )
Calculation Method-1
Wetland Fraction TWA / TSA [acres]
0 13.843 = 0 %
Non -Wetland Area (NWA) = TSA - TWA [acres]
13.843 - 0 = 13.8
Project Area = NWA / 0.75 [acres]
13.8 / 0.75 = 18.4 = Not Applicable
Calculation Method-2
Non -Wetland Area (NWA) = TSA - TWA [acres]
13.843 - 0 = 13.84
Project Area = NWA + SWA [acres]
13.843 + 0 = 13.84
1 Total Project Area = 13.84 ac. = Method-2

Stormwater Pond Capacity Design
For
Ferguson Distributors
New Hanover County, North Carolina

Wet Detention Basin Design Sheet
Ferguson Site
Stormwater Pond
1 otal Drainage Area, Ad = l 602,992 I1 [sf]
Buildings/Lots: 70.365
Parking Lot/ Driveway: 170,544
Sidewalk: 4,502
Future: 137,000
[sf]
[sf]
[sf]
[sf]
Total Impervious Area, Ai = 1 382,411 [sf]
Surface Area Calculations
All Ponds Combined: Death
Connected Pond
Contour Elevation
£Connceted Pond
Contour Area CA
Pond Depth
D
Incremental
Volume
D*EjCA
fmsl1
[sq ftj
ft
I [sq ftj
I jgn
7.50
12,211
Sediment Stoage
8.50
16,024
6.00
0
0
9.50
18,296
5.00
17,160
17,160
10.50
20,697
4.00
19,496
36,656
11.50
23,202
3.00
21,949
58,605
12.50
25,813
2.00
24.508
83,112
13.50
28,762
1.00
1 27.288
1 110,400
14.50
34,023
0.00
31,393
1 141,793 Ji
Average Depth (d) = ED*ErCA / EErCA
d (ft) = 141,793 4.2 ft
34,023
Minimum Average Depth = 3ft < 4.2 ft < Oft = Maximum Average Depth OK
Percent Impervious (1):
Imp = EAi / Ad
Imp = 382411 / 602992.23
Imp = 63.42 %
Sediment Removal Efficiency (Percent) = 90
SAIDA Ratio Determination
Higher Percentage =
70
SAIDA %
Interpolation Bi-Directional
Higher Depth =
4.5
5.50
1 st - SA/DA @ Depth Interpolation
SA/DA %
Lower Depth =
4
6.00
SA/DA at Imp = 70%, d =4.2 ft
5.83
SAIDA at Imp = 60°k, d =4.2 ft
5.13
Lower Percentage =
60
SA/DA %
Higher Depth =
4.5
4.80
2nd - SA/DA @ Impervious Interpolation
SA/DA %
Lower Depth =
4
5.30
SA/DA Ratio at Imp =63.42%
5.37
Pond Shall Have an Average Depth of 4.2 ft and Be Designed to Remove 90% TSS
SAIDA = 5.37 %
Required Surface Area at Permanent Pool Elevation (14.5 ft) for Pond
SAREQ. _ (SA/DA)*Ad
SAREQ, _ (5.37/100)*602992.23sf
SAREQ. = 32,391 sf

SA Provided = 34,023 > 32,391 = SA Required OK
ITemporary Storage Volume Calculations
Minimum Required Volume (Simple Method by Tom Scheuler):
Receiving water body name ........................ Cape Fear River
Receiving water body classification ............... C;Sw
Receiving water body location.....................I New Hanover County, NC
First Flush Volume Required, P = 1.5 in
Rv= 0.05 + 0.009 * (Imp)
Rv = 0.0563.42)
Rv =�0.621
Volume = P * Rv * Ad
Volume = 1.5/12 * 0.621 *(602992.23sf)
Volume = 46,790 1 sf
Ponds: Striae Storaae Function
Contour Elevation
Contour Area
CA
Incremental Storage
Accumlative
Storage S
fmsl
NO ft
14.50
34,023
0
0
15.00
38,362
18,096
18,096
15.50
40,298
19,665
37,761
15.73
40,873
9,335
47,096
16.50
42,815
41,557
79.318
Required Temporary Storage Volume, RTSV.
Height of First Flush of Runoff ...................
Permanent Pool Elevation, PPE .................
Minimum Temporary Pool Elevation, MTPE...
Designed Temporary Pool Elevation, DTPE..
Surface Area at Temporary Pool Elevation....
Designed Temporary Storage Volume, DTSV
.................. 46,790 Cf
.................. 1.217 ft
................... 14.50 fmsl
................... 15.72 fmsl
.................. 15.73 fmsl
................... 40,873 sf
.................. 47,096 cf
11 Vol. Provided = 47,096 > 46,790 = Vol Required OK

Forbay Sizing Calculations
Forbay Permanent Volume
Pond
Contour Elevation
Pond
Contour Area
Increment. Volume
I Accum. Volume
[fmsll
1sqftl
rcu ftl
1 rcu ft
7.50
2,468 j
Sediment Storage
8.50
2,763
0
0
9.50
3,245
3,004
3,004
10.50
3,770
3,507
6,511
11.50
4,327
4,048
10,559
12.50
4918
4,623
15,181
13.50
5,775
5,347
20,528
14.50
6,201
5,988
1 26,516 J.
Main Pond Permanent Volume
Contour Elevation
Contour Area
Increment. Volume
Accum. Volume
[fmsI1
Fsqft
I CCU ftl
I CCU ft
7.50
9,744 j
Sediment Storage
8.50
113,261
0
0
9.50
15,051 j
14,156
14,156
10.50
16,927
15,989
30,145
11.50
18, 875
17,901
48,046
12.50
20,895
19,885
67,931
13.50
22,987
21.941
89,872
14.50
27,822
25,404
1 115,276 -11
Total Basin Volume = 141,793 cf <--- Forebay Volume + Main Pond Volume
Forebay Volume = 26,516 cf
Min Forbay Volume = (18%)*(Total Basin Volume)
Min Forbay Volume = 18% * 141793
Min Forbay Volume = 1 25,523 of
Max Forbay Volume (22%)*(Total Basin Volume)
Max Forbay Volume = 22% * 141793
Max Forbay Volume = 1 31,194 1 cf
11 Min FB Vol = 25523cf > 26,516 > 31194cf = Max FB Vol OK
Drawdown Orifice Sizing Calculations
Orifice Diameter, D = - in
Orifice Coefficient, Cd
Ao
Ao = 0.78540*(4in/12in/ft)^2
Ao = 0.087 I sf
Qorifice = Cd*Ao*(2g*Havg)0.50
Qorifice=(0.6)*(0.087sf)*(64.4fpss*0.35ft)^0.5
Qorifice = 0.250 cfs
Havg= (DTPE-PPE-D/2)/3
Havg = 15.73ft -14.5ft - 0.50*4in/ I2in/ft) / 3
Havg = 0.35 ft
tdd = DTSV / Qorifice
tdd = ( 47096cf / 0.25cfs) / 86,400sec/day
tdd = 2.2 days
11 2 days < 2.2 days < 5 days OK ii

Outlet Desi n Calculations
Post Development Watershed Information
Watershed Length, L — 1,100 ft
Watershed Head, H IL__3.5 j ft
Time of Concentration, Tc,post = L3/H °' /128
Time of Concentration, Tc,post = 16 min
1-yr Storm Event =
10-yr Storm Event =
100-yr Storm Event =
146
20
268
32
403
37
Basin Composite C, Cc,post = %Imp*(0.95) + (1 - %Imp)*(0.29)
Basin Composite C, Cc,post = 0.6342 *0.95 + (1 - 0.6342)*0.29
Basin Composite C, Cc,post = 0.71
Emergency Spillway Design (100-yr Storm Event)
100-yr intensity, post = g / (Tc + h)
100-yr intensity, post = 403 /(16min + 37 )
100-yr intensity,post = 7.65 in/hr
<- -NHCo SW Manual
<- -NHCo SW Manual
<- -NHCo SW Manual
0100,post = (Cc, post)* (1 00-yr Intensity, post)*Ad
Q100,post = 0.71 * 7.65in/hr *(602992.23sf / 43,560sf/ac)
Q100,post = 1 75 1 cis
Top of Bank Elevation, TOP = fmsl
Design Spillway Invert, DSI =EN
fmsl
Spillway Weir Cocfficicnt, Cw =[earthern]
Available Head for Discharge, Hs = TOP - DSI
Available Head for Discharge, Hs = 18.44fmsl-17.65fmsl
Available Head for Discharge, Hs = 0.79 ft
Required Length of Spillway, Lsr = Q100,post / (Cw *Hs''5)
Required Length of Spillway, Lsr = 75 /(3 *(0.79ft-1.50) )
Required Length of Spillway, Lsr = 36 ft
Designed Length of Spillway, Lsd = 157 ft
Length Provided = 157 > 36 = Length Req'd OK
Depth of Flow, d = (Q100,post / (Cw * Lsd))"'-'
Depth of Flow, d = 75cfs /(3*157ft ) — (1/1.50)
Depth of Flow, d = 0.3 ft
Spillway Flow Depth Elevation = DSI + d
Spillway Flow Depth Elevation = 17.65fmsl + 0.3ft
Spillway Flow Depth Elevation = 17.94 fmsl
Emergency Freeboard = TOP - SI - d
Emergency Freeboard = 18.4fmsl-17.65fmsl - 0.3ft
Emergency Freeboard = 0.50 ft
11 Emergency Freeboard Provided = 0.50 > 0.50 = Freeboard Req'd OK

Channel Roughness, n = 0.035 [earthern]
Channel Side Slope, m = L.� MA
Conveyance Factor, K = (Lsd*Hs + m*Hs2)1'66'/ (Lsd + 2*Hs*(1+m2)0'5)0'66'
Conveyance Factor, K = 157*0.79 + 3*0.79 ^ 2) ^ 1.667 / (157 + 2*0.79* (1 +3 ^ 2) ^ 0.50) ^ 0.667
Conveyance Factor, K = 106.418
Mimimum Channel Slope, Sm = 100*(Q100,post/ (1.49*K/n))2
Mimimum Channel Slope, Sm = 100* 75 / 1,49*106.418/0.035)) ^ 2
Mimimum Channel Slope, Sm = 0.03 %
Designed Channel Slope, Sd = 0.20 %
Slope Provided = 0.20 > 0.03 = Slope Req'd OK
1- r Pre -!Development Discharge
Tc Multiplier, K,post = 2.00 [overland flow]
C, pre= 0.25
Time of Concentration, Tc,post = (K/128)*(L3/H)0335
Time of Concentration, Tc,post = (2/128)*((1100^3)/3.5) ^0.385
Time of Concentration, Tc,post = 31 [min]
1-yr intensity, pre = g / (Tc + h)
1-yr intensity, pre = 146 /(31 min + 20)
1-yr intensity,pre = 1 2.84 1 [in/hr]
Qi,pre = (C,pre)*(1-yr Intensity,pre)*Ad
Q1,pre = 0.25 * 2.84in*(602992.23sf / 43,560sf/ac)
Q1,pre = /hr 10 [cis]
Hmax on Orifice = DTPE - PPE - D/2
Hmax on Orifice = 15.73fmsl-14.5fmsl - 0.50*4in/12in/ft
Hmax on Orifice = 1.06 [ft]
Qorifice-max = Cd*Ao*(2g*Hmax) )-o
Qorifice-max 0.6 *(0.087s ,'2*32.2fpss*1.06ft) ^0.5
Qorifice-max 0.433 j [cfs]
11 Qoriffce-max = 0.43 ¢ 9.83 = Qpre-iyr OK

Supplemental Storm Sewer Calculations
For
Ferguson Distributors
New Hanover County, North Carolina

w 0
cn
3
z
C
3
v
m
0
m
m
w
0
In
m
0
N
2
a 90
0
i 00
cn W
0
3
m
m
n:
0
o:
m
0

v
o
w
N
J
zr
o
CDm
a
co
N
Z _ p
CL
O
3
n
T._
7
N
a
O=
_ r-
D
O
S
O
3
m
cow
�
_
° p
—
o_
(D
ai
N
v
v
0
,gam
0
p
p
0
0
0
�A�
0
N
0
W
o
a)
m p
n N
-n
0
0
0
ow 7
v
co
co
ID
4
p1
0
W
(h
M —
CD
w
ry
m g
A
N
O N
0)
O
O
O
N r
O
O
(gyp
o O O
N
w
w
mj
O
A
Cc�p
CF)
z
c
OD
W
A
^ter
F j
N
O
O1
—
p
7
y
n
n
=
n
(A
m C
DI
W
=
N N
i
o
p
p
<
i
o
0
0
z
W
W
W
(D
o
_ n
O
00
N
VI
C O
N
31 7
O
O
O
A
m�
o
—
N
m
N
O
(ll
R
in
O
co
v_
o
W
rn
u,
n_
r
w
i
a
cn
O
3
cn
M-
T
d
(Q
N

^�
-'
z r
z
0
-0c^'
0
oa
m
fD
ri
n
m
0)
c
(n
C7
v
W
o
rn
cn
n
41
m
a
oCD
o_
II
:3
O
m
0
O
-<
5C
-r
N
W
(p
a
C
pj
0
in
w
a
CD
CD
N
U7
�e T
N
�
ry
_
r
u7
6
(
A
^. N r
"
(D
O
W
lNp A
n
O
7
Ci
0
0
ul r
= 3
CD CD
W
N
to
t W
W
N
m
A
CD
N
.fi rM
_°a.
w
w
r�
io
O
.Wp.
00Dj
C CD
v �
O
o
OD.
^N r
(D
w
o
o
to
cn
o
z
c
bD
C. S
v
rn
cn
c.
r
O
:3
ai
C7�
U7
A
Oo
.P
rn
N
C S
a
w
»
r-
O
O
O
O
N
A
O
y C
Ui
CT
A
.-. C 2
c
CA-
`"'
r
7
v
v
m
N
j
Z= v
N
OQ
O 7
(n
_
90
N
O
_
v
v
n
O
U!
V!
6
N
W
O
7
�
cn
rF
0
Vn
m
co
�T
N
00
O
T
01

§
-0u
a
ƒE
,
2
3
g § e
/
#
_ « �
z
\
/
+
e
U
\
,
E
0
2
#
2
/
4 g §
2\
\
\
P P P
n
-
/
g
8 8 E
` O
/ J
)
¥ # @
\ (A §
\ O
aID
k
P P P
8 8
< D
8
"a
ƒ
c c 2
4 2
+
$ \
2 n
§
$
2
g 2
I
3-
»
o 0
/
\
o P u
.
£
k E k
J r
E
\
\
/ 7
\ §
CD
Q
E
w w
;
"
k 8 8
k r
G
(
@
8 8 E
J
=
e e e
Cl)
0
G 3 2
CD
m ¥
&
k 8 @
k
k2
}
\ \ /
ca
§
k
(
k
P P P
Ca
®
y
(
7 \ \
-
U
°
P g P
_
§ y o
2
0 0 8
}
P g o
v
f
2 @ §
\
Cl)
0
m k S
[
\ § \
Cl
F
g
7
Lae d
f
=
\
co0) k
% \ /
J
\ \
+ J
k
0
, m�

z
-0
z r
o
�
m
CD'
w
N
coo
cn
TI
n
m
n
fn
0
cn
A
w
0
nni
0
0
n
n
0.
a
�G
N
N 0
O
C
Oo
OD
A
'-'
10 <D
-h
r
of
in
o
0
0
;
Nr
3
0
o
`'\�
D m
(D
co
W
N
'
5
m
is
A
w
m
0)
N
t0
W
00
O N
O
A
O
m3
O
O
0
ma
3
z
3
Q
q
0
m
w
O
a
m
0
N
a0
N
O
O
co
_�

C)
to
W

0
(D
OD
V
O
m
A
w
N
OZ r•
�m
m
00
V
Ut
A
W
Nm
j
Z— p
fA
C
Q
(D N
O
C
d
_.
V
07
00
co
s
s
s
V
V
r
V
O
co
W
W
(Jl
=r
79
C_
3
O
Cal
N
G D1 p
7
Ill
N
O CC
to —
fCO)(
V
v
v
o
0
o
v
v
0
0
,gam
n
a�
a�
Q
a
O
o
a
p
o
p
p
p
0
X
0
0
0
0
0
0
0
0
0
A0
p
0
p
p
p
0
p
p
o
w p
W
(O
-A+
O
V
V
0
W
V
(� � 7
�
v
V
v
co
V
(D
V
CD
-4
coV
V
V
V
m
(T
O
(T
O
Vt
O
Vt
O
N
O
C71
O
U1
O
U1
O
(T
O
3 K 3
7 (D (D
W
N
--•
W
N
-+
O
O
p
R1
-4
O
O
(OD
(4
O
A
v N
7 �
O
O
O
O
O
O
O
O
OCil
N r
O
O
O
O
O
O
0
(AO
O
a m
v (D (D
lD
W
N
N
W
W
N
O
O
00
ao
00
O
-a
OV
CD
CA
O
A
V
OD
C (CD
Z
c
QDD
O
O
00
O
A
O
O
N
N
y
.. O (D
O
N
—
"'
v
7
N
l
CD
n
n
n
n
n
n
n
n
n
=
m
O
O
O
O
O
O
O
O
O
C
O
O
O
O
O
O
O
O
O
7 °1 Z
`r C
W
La
C.)W
La
W
W
N
s
-a
O
-..
O
0 C.
O
O
O
O
O
piN
O
A
fD O
� N
o
0
0
0
0
0
0
0
0
rn
o
—
N
-
w
o
g
n
g
g
g
n
n
m
0
N
A
N
O
[O
W
i
v
00
O
(n
A
W
N
--�
O
D]
((DD
v

x
(0
07
V
0)
cyl
A
W
N
z r
z
_0
0
0
CD
m
T0
0
0
0
v_
0
0
0
m
X
CDA
Cn
N
O
o
�
g
g
g
g
v
g
V
9
A
o
r
a
0)
(Yi
G)
iv
—.
m
3
o'
n
°1
co
o
v
`0
0
y
-n
m
cn
�
V
G
0
3
�
N
d
0)
OD
W
Q)
V
O
•�
W
�I
A
C'i 01
_
O
O
j
V
N
00
Oc)
n
O
A
y'
2
r
m
Cr
8
O
O
A
O
O
NCD
^. y r
N
O
0o
N
0
0
�
Ci
Ci
Ci
ci
Ci
Ci
Ci
0
sr
0.3
N
-4
Oo
OD
OD
( 4
O
(0
W
W
w
V
V
A
(a
mS
N
co
P
CA
go
j
Wfl
O
V
O
O
(00
(
A
W
N
N
W
W
N
O
O
PO
m
0
-
v
O
O
A
V
Oo
.v' ' C (D
01
a �
O
O
O
O
O
O
O
O
O
.. yco r
V
N
A
coo
(00
(00
.OP
00)
N
z
O
8t
in
A
A
rL 2
O
U1
W
DD
O
N
Oo
A
Oo
Vt
r'' Gi
O
-w
m
V1
(T
(n
V
O
O
CT
cn
A
W
W
(D
N
N
W
(WO*
C =
G)
r
O
O
O
O
O
O
O
O
OPO
A
V
(00
OV
N
O
Ut
O
0")
N
y
O
O
()'i
..A
Vt
V
8
8
Ot
cn
0)
(D
V
co
(0
Oo
O
m
0
n
,• r
I
m
lD
co
V
s
U1
A
W
N
N
o.
o=o;
�y
1
N
0
0
0
0
0
0
0
0
000
a
a
a
a
a
a
s
0
0
0
0
c
1
6
,�
N
0
cn
e-F
0
cn
CD
CD
I
cn
A�
�T
N
M
O
T
01
Q
m

z
-0
(O
Oa
ti
p
Ui
A
W
N
--+
z I_
O
o
O�
m
a
-n
p
U7
A
W
N
j
O
z
w
rn
m
In
II
�
�
O
O)
m
co
O
m
J
41
((D
OP,
.
a)
V
w
D II
m
V
O
O
O
O
O
O
O
O
O
(7
0
0
0
0
0
0
0
0
0
w
�+ p
u
°)
(o
y
O
W
W
W
W
N
U1
(T
W
•[OT
OOD
O
V
(�D
A
W
V
(�O
'wpm p
u
O
O
O
O
O
O
O
O
O
O
0
O
C.
O
O
O
0
O
p
O
p
O
O
0
o
O
o
H ,Q10
a
m
D
D
D
D
O
D
D
0
0
,g �
+
3
3
IDM
N
a�
a�
a�
Q
O
.P
O
O
O
O
O
p
O
A
A
'� S
>
O
O
O
O
O
O
O
O
O
.�► .�
C
O
Q
22
O
O
O
O
O
O
O
N
N
0
0
0
0
0
0
0
0
0�
:»
m
C
N
N
s
A
NW
(D
co
OOi
coW
a
W
W
W
W
W
W
W
W
W
II
00000000C)
o
�
N
N
N
N
N
N
N
~
O
O
O
O
O
O
O
O
O
a
Q
(o
(o
(o
(o
(o
(o
(o
(o
(o
O
(D
y
N
N
N
N
N
N
N
N
N
{
O
O
O
O
O
O
O
O
O
C
C
O
O
O
O
O
O
O
O
O
p
o
0
0
0
0
0
0
0
0
0
o
0
0
0
0
0
0
0
(n
m
o.
m
��
m
0
0
0
p
0
0
0
0
o
0
—
G)
0
0
0
0
0
0
0
0
0
N
x
D
US
(ll
N
U7
U1
U1
U1
(.fl
U(
UI
9
C
(O
O
O
O
O
O
O
O
O
p
a
0
0
0
0
0
0
0
0
0
O
O
O
O
O
O
O
O
O
w
p
p
O
O
O
O
p
p
p
m
O
O
O
O
Na)v
A
O
N
N
_
O
Oio
fD
m
T
0
0
O
0
p
p
w
�
01
0-
dO
O
p
p
O
O
C
O
O
N
N
a)
A
.ram
(D
V
0)
O
O
O
O
�
N
m
N
N
N
N
?
OrQ
N
'O
W
rr
N
O
co
—
p
O
O
O
O
Ut
O
p
a
O
O
p
O
O
p
p
O
O
O
p
^. p
0
0
0
0
0
0
0
C
p
�• a
00
0
0
z W
0
0
0
0
0
0

z
_0
Zr
O
o
m
mn
a
O
OD
V
O)
m
A
W
N.)N
*
m
o
0-0
°CD
0'
g
g
2g
o
o
-
—
-
O-
o)
s
a.
W
w
v
�
0C
W
W
-+
N
W
W
A
"
N' 7
W
O
O
O
Oo
A
O
O
N
N fD
-n
�r
cn
O
o
0
0
0
0
0
0
0
N r
"
0
0
O
O
0
O
0
00
0
� N
4
63
O
-�'
W
M
A
v
O
0
W
N
N
W
W
N
O
co
00
-J
O
O
W
—
O
O
A
J
W
ma
V
J
J
V
V
V
V
V
O
AO
O
O
O
O
O
O
O
O
ma
O
O
O
O
O
O
O
O
O
3
z
3
a-
w
0
:'
CD
Y,
co
v
m
rn
o
N
Do
N
t
O
O
co
I
1
1
:�q
X
CD
O
m
N
O
lD

>K
P. 01 �K
�K
TRANSACTION REPORT
w.�K
FEB-14-2008
THU 11:28 AM �K
�K FOR: NCDENR
9103502004
�K
SEND
DATE START RECEIVER
TX TIME PAGES TYPE:
NOTE:
M# llP iK
>K FEB-14 11:28 AM 93956605
1101" 2 FAX TX
OK
(01) 785 �c
>K
�K
TOTAL
1M 1S PAGES:
2
>K
�
NCDENR
(North Carolina Department of Environment and Natural Resources
Wilmington Regional Office
(9101796,7215
Michael F_ Easley, Governor
Wi I loam G. Ross Jr., Secretary
FAX COVER SHEET
Dane._ C LA — 0 c5 # apes
b
From;
Co: Division ('Y,?PCSS — i�L-1�
Ea X: 01 `�►' tro�o 0 F.k�X #; 910-350-2004
127 Cardinal Driva Ext., Wilmington, Norlh Carolina 28405.3845 • Phone: [phone] FAX. [phone]

Coastal Land Design, PLLC.
P. O. Box 1172 Wilmington, NC 28402
Phone:[phone] Fax:[phone]
To: NCDENR-Division of Water Quality
127 Cardinal Drive Extension
Wilmington, NC 28405
Attn: I Mr. Chris Baker
Transmittal
Date: February 11, 2008
File: 650-03
Subject: Ferguson Distributors
Stormwater Submittal
❑ As Requested ❑ For Your Files ❑ For Distribution ® For your Review / Action / Approval
❑ Sent via Mail ❑ Sent via Courier
Quantity
Drawing No.
Description
1
Check
In the Amount of $4,000.00
1
Original
Stormwater Management Permit Application Form (SWU-101)
1
Copy
Stormwater Management Permit Application Form (SWU-101)
1
Original
Wet Detention Basin Supplement (SWU-102)
1
Original
Wet Detention Basin Inspection and Maintenance Agreement (SW-401)
1
Copy
Stormwater Design Narrative
1
Copy
Stormwater Design Supplemental Calculations
3
Sets
Stormwater Plans (Cover, SW-01, and SW-02)
1
Copy
Cape Fear Investment & Development, LLC Articles of Organization
1
Copy
Current Deed
REMARKS I Please let me know if you have any questions or concerns.
Sig
n, PLLC.
Transmittal-NCDENR