SW8000824_HISTORICAL FILE_20060828

STORMWATER DIVISION CODING SHEET
POST-CONSTRUCTION PERMITS
PERMIT NO. SW8 /)
DOC TYPE ❑ CURRENT PERMIT
❑ APPROVED PLANS
X%�HISTORICAL FILE
❑ COMPLIANCE EVALUATION INSPECTION
DOC DATE
YMMDD

�QF \NATFR Michael F. Easley,Governor
�O G William G.Ross Jr,Secretary
VJ r North Carolina Department of Environment and Natural Resources
J
� Y Alan W.Klimek,P.E. Director
Division of Water Quality
August 28, 2006
Mr. Norman Sneeden DWO C COPY
PO Box 1509 YV FILE 1
Wrightsville Beach, NC 28480
Subject: Stormwater Permit No. SW8 000824 Modification
Hermitage Park Warehouse
High Density Project
New Hanover County
Dear Mr. Sneeden:
The Wilmington Regional Office received a complete Stormwater Management Permit
Application for Hermitage Park Warehouse on August 25, 2006. 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 000824
dated August 28, 2006, for the construction of the subject project.
This permit shall be effective from the date of issuance until August 28, 2016, 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 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 matter, please
contact Linda Lewis, or me at [phone].
Sincerely,
Edward Beck
Regional Supervisor
Surface Water Protection Section
ENB/arl: S:\WOS\STORMWAT\PERMIT\000824mod.aug06
cc: Phil Tripp, P.E., Tripp Engineering
Tony Roberts, New Hanover County Building Inspections
City of Wilmington Development Services
Beth E. Wetherill, New Hanover County Engineering
Linda Lewis
Wilmington Regional Office
Central Files
No thCarolina
atura!!y
North Carolina Division of Water Quality , 127 Cardinal Drive Extension Wilmington,NC 28405 Phone[phone] Customer Service
Wilmington Regional Office Internet: www.ncwaterQt;ality.org Fax [phone]
An Equal Opportunity/Affirmative Action Employer—50%Recycledl10%Post Consumer Paper

State Stormwater Management Systems
Permit No. SW8 000824Modification Q
STATE OF NORTH CAROLINA
DEPARTMENT OF ENVIRONMENT AND NATURAL RESOURCES
DIVISION OF WATER QUALITY
STATE STORMWATER MANAGEMENT PERMIT
HIGH DENSITY DEVELOPMENT
In accordance with the provisions of Article 21 of Chapter 143, General Statutes of
North Carolina as amended, and other applicable Laws, Rules, and Regulations
PERMISSION IS HEREBY GRANTED TO
Norman Sneeden
Hermitage Park Warehouse
3985 Blue Clay Road, Wilmington, 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 "storm water 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 28, 2016, 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. The stormwater
control has been designed to handle the runoff from 131,896 square feet of
impervious area..
3. The tract will be limited to the amount of built-upon area indicated on page 3 of
this permit, and per approved plans. The built-upon area for the future
development is limited to 11,406 square feet.
4. 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.
5. The runoff from all built-upon area within the permitted drainage area of this
project must be directed into the permitted stormwater control system.
Page 2 of 7

State Stormwater Management Systems
Permit No. SW8 000824 Modification
STATE OF NORTH CAROLINA
DEPARTMENT OF ENVIRONMENT AND NATURAL RESOURCES
DIVISION OF WATER QUALITY
STATE STORMWATER MANAGEMENT PERMIT
HIGH DENSITY DEVELOPMENT
In accordance with the provisions of Article 21 of Chapter 143, General Statutes of
North Carolina as amended, and other applicable Laws, Rules, and Regulations
PERMISSION IS HEREBY GRANTED TO
Norman Sneeden
Hermitage Park Warehouse
3985 Blue Clay Road, Wilmington, 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 28, 2016, 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. The stormwater
control has been designed to handle the runoff from 131,896 square feet of
impervious area..
3. The tract will be limited to the amount of built-upon area indicated on page 3 of
this permit, and per approved plans. The built-upon area for the future
development is limited to 11,406 square feet.
4. 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.
5. The runoff from all built-upon area within the permitted drainage area of this
project must be directed into the permitted stormwater control system.
Page 2 of 7

State Stormwater Management Systems
Permit No. SW8 000824 Modification
6. The following design criteria have been provided in the wet detention pond and
must be maintained at design condition:
a. Drainage Area, ?cres: 8.30
Onsite, ft : 361,548
Offsite, ftz: 0
b. Total Impervious Surfaces, ftz: 131,896
C. Design Storm, inches: 1
d. Pond Depth, feet: 6.0
e. TSS removal efficiency: 90%
f. Permanent Pool Elevation, FMS.z: 24.20
Permanent Pool Surface Areq, ft : 16,963
h. Permitted Storage Volume, ft : 22,453
i. Temporary Storage Elevation, FMSL: 25.45
j. Controlling Orifice: 2"0 pipe
k. Permitted Forebay Volume, ft3: 11,890
I. Receiving Stream/River Basin: UT Prince George Creek / CPF23
M. Stream Index Number: 18-74-53
n. Classification of Water Body: "C Sw"
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.
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 slopes and the vegetated filter.
d. Immediate repair of eroded areas.
e. Maintenance of all slopes in accordance with approved plans and
specifications.
f. Debris removal and unclogging of outlet structure, orifice device, flow
spreader, catch basins and piping.
g. Access to the outlet structure must be available at all times.
4. Records of maintenance activities must be kept and made available upon
request to authorized personnel of DWQ. The records will indicate the date,
activity, name of person performing the work and what actions were taken.
5. 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. A
modification may be required for those deviations.
Page 3 of 7

State Stormwater Management Systems
Permit No. SW8 000824 Modification
6. 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.
d. The maximum horsepower for a fountain in this pond is 1/4 horsepower.
7. The facilities shall be constructed as shown on the approved plans. 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.
8. If the stormwater system was used as an Erosion Control device, it must be
restored to design condition prior to operation as a stormwater treatment device,
and prior to occupancy of the facility.
9. Access to the stormwater facilities shall be maintained via appropriate.
easements at all times.
10. 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 any item shown on the approved plans, including the
stormwater management measures, built-upon area, details, etc.
b. Project name change.
C. Transfer of ownership.
d. Redesign or addition to the approved amount of built-upon'area or to the
drainage area.
e. Further subdivision, acquisition, lease 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.
11. The permittee shall submit final site layout and grading plans for any permitted
future areas shown on the approved plans, prior to construction.
12. 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.
13. 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.
Page 4 of 7

State Stormwater Management Systems
Permit No. SW8 000824 Modification
III. GENERAL CONDITIONS
1. This permit is not transferable except after notice to and approval by the Director.
In the event of a change of ownership, or a name change, the permittee must
submit a formal permit transfer request to the Division of Water Quality,
accompanied by a completed name/ownership change form, documentation
from the parties involved, and other supporting materials as may be appropriate.
The approval of this request will be considered on its merits and may or may not
be approved. The permittee is responsible for compliance with all permit
conditions until such time as the Division approves the transfer request.
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) having jurisdiction.
4. In the event that the facilities fail to perform satisfactorily, including the creation
of nuisance conditions, the Permittee shall take immediate corrective action,
including those as may be required by this Division, such as the construction of
additional or replacement stormwater management systems.
5. The permittee grants DENR Staff permission to enter the property during normal
business hours for the purpose of inspecting all components of the permitted
stormwater management 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.
7. Unless specified elsewhere, permanent seeding requirements for the stormwater
control must follow the guidelines established in the North Carolina Erosion and
Sediment Control Planning and Design Manual.
8. Approved plans and specifications for this project are incorporated by reference
and are enforceable parts of the permit.
9. The permittee shall notify the Division any name, ownership or mailing address
changes within 30 days.
Permit issued this the 28th day of August 2006.
NORTH CAROLINA ENVIRONMENTAL MANAGEMENT COMMISSION
Tor-Alan W. Klimek, P.E�)Director .
Division of Water Quality
By Authority of the Environmental Management Commission
Page 5 of 7

OFFICE USE ONLY
Date Received Fee Paid Permit Number
L , o— 0j vo D "Au
mvd. 6-e 2cNo ED State of North Carolina
Department of Environment and Natural Resources DEC 8 0 2005
Division of Water Quality
-X;
STORMWATER MANAGEMENT PERMIT APPLICATION FORMA—
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):
Hermitage Park Warehousing_
2. Print Owner/Signing Official's name and title(person legally responsible for facility and compliance):
Norman Sneeden/Owner
3. Mailing Address for person listed in item 2 above:
P.O. Box 1509
City: Wrightsville Beach State: NC Zip: 28480
Telephone Number: 910-791-6841
4. Project Name(subdivision, facility,or establishment name—should be consistent with project name on
plans, specifications, letters,operation and maintenance agreements, etc.):
Hermitage Park Warehouse Expansion
5. Location of Project(street address):
3985 Blue Clay Road
City: Wilmin on County: New Hanover
6. Directions to project(from nearest major intersection):
From the intersection of 132 and Blue Clay Road,travel south on Blue Clay Road for Approximately
.85 mile. Site is on an access road, 3985 Blue Clay Road
7. Latitude : N 340 19' 00" Longitude: W 770 55' 00" of project
8. Contact person who can answer questions about the project:
Name: Jonathan W. Ham, E.I. Telephone Number: 910-763-5100
II. PERMIT INFORMATION:
1. Specify whether project is(check one): New Renewal X Modification
Form SWU-101 Version 3.99 Page I of

2. If this application is being submitted as the result of a renewal or modification to an existing permit, list
The existing permit number SW8 000824 and its issue date(if known) 10/20/02
3. Specify the type of project(check one):
Low Density X High Density Redevelop GeneralPermit Other
4. Additional Project Requirements(check applicable blanks):
CAMA Major X Sedimentation/Erosion Control 404//401 Permit _NPDES Stormwater
Information on required state permits can be obtained by contacting the Customer Service Center at
1-877-623-6748.
IIl. 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.
wet detention
2. Stormwater runoff from this project drains to the Cape Fear River basin.
3. Total Project Area: 8.5 acres 4. Project Built Upon Area: 22.12 %.
5. How many drainage basins does the project have? 1
6. 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 Drainage Basin 1 Drainage Basin 2
Receiving Stream Name Unnamed trib to Prince George Creek
Receiving Stream Class C-SW
Drainage Basin Area 8.3 ac
Existing Impervious * Area 3.03 ac
Proposed Impervious * Area 3.03 ac
% Impervious* Area(total) 36.48%
Impervious * Surface Area Drainage Basin I Drainage Basin 2
On-site Buildings 74,040 sf
On-site Streets -
On-site Parking 46,450 sf
On-site Sidewalks -
Other on-site(FUTURE) 11,406 sf
Off-site -
Total: E=131,896sf Y'=
*Impervious area is defined as the built upon area including, but not limited to, buildings, roads,parking
areas sidewalks, gravel areas, etc.
Form SWU-101 Version 3.99 Page 2 of 4

7. How was the off-site impervious area listed above derived? NA
IV. DEED RESTRICTIONS AND PROTECTIVE COVENANTS
The following italicized 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.
1. The following covenants are intended to ensure ongoing compliance with state stormwater management permit
number NA as issued by the Division of Water Quality. These covenants may
not be changed or deleted without the consent of the State.
2. No more than NA square feet ofarty lot shall be covered by structures of impervious materials.
Impervious materials include asphalt,gravel,concrete, brick stone,slate or similar material but do not include wood
decking or the water surface ofswimmmg pools.
3. Swales shall not be filled in,piped or altered except as necessary to provide driveway crossings.
4. Built-upon area in excess of the permitted amount requires a state stormwater management permit moderation prior
to construction
5. All permitted runofffrom outparcels orfiture development shall be directed into the permitted stormwater control
system. These connections to the stormwater control system shall be performed in a manner that maintains the
integrity and performance of the system as permitted
By your signature below,you certify that the recorded deed restrictions and protective covenants for this project
shall include all the applicable items required above,that the covenants will be binding on all parties and
persons claiming under them,that they will run with the land,that the required covenants cannot be changed or
deleted without concurrence from the State,and that they will be recorded prior to the sale of any lot.
V. 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(910)733-5083 for
the status and availability of these forms.
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 Ott-Site System Supplement
Form SWU-107 Underground Infiltration Trench Supplement
Form SWU-108 Neuse River Basin Supplement
Form SWU-109 Innovative Best Management Practice Supplement
Form SWU-101 Version 3.99 Page 3 of

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 Regional Office.
1. Please indicate that you have provided the following required information by initialing in the space
provided next to each item.
Ap is 1 itials
• Original and one copy of the Stormwater Management Permit Application Form
• One copy of the applicable Supplement Form(s)for each BMP
• Permit application processing fee of$420(payable to NCDENR)
• 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, 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)
VH. 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): Tripp Engineering, P.C.
Mailing Address: 419 Chestnut Street
City: Wilmington State: NC Zip: 28401
Phone: [phone] Fax: [phone]
VIH. APPLICANT'S CERTIFICATION
I, (print or type name of person listed in General Information, item 2) Norman Sneeden
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 will be record d,and that the proposed project complies with the requirements of 15A
NCAC 2H .1000.
Signature: Date: - 9. 0S
Form SWU-101 Version 3.99 Page of

TE 00086
Permit No. SW8 000824
(to be provided by DWQ)
State of North Carolina
Department of Environment and Natural Resources
Division of Water Quality
STORMWATER MANAGEMENT PERMIT APPLICATION FORM
WET DETENTION BASIN SUPPLEMENT
This form may be photocopied for use as an original
DWQ 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: Hermitage Park Warehouse Expansion
Contact Person: Jonathan W. Ham E.I. Phone Number: ( 910 1 763-5100
For projects with multiple basins, specify which basin this worksheet applies to: 1
elevations
Basin Bottom Elevation 19.0 ft. (/loor of the basin)
Permanent Pool Elevation 24.2 ft. (elevation of the orifice)
Temporary Pool Elevation 25.45 ft. (elevation of the discharge structure overflow)
areas
Permanent Pool Surface Area 16��sq.ft. (water surface area at the orifice elevation)
Drainage Area 8.3 ac. (on-site and off-site drainage to the basin)
Impervious Area 3.03 ac. (on-site and off-site drainage to the basin)
volumes
Permanent Pool Volume 5�452 cu.ft. (combined volume ofmain basin and forebay)
Temporary Pool Volume 2��cu.ft. (volume detained above the permanent pool)
Forebay Volume 12,875 cu.ft. (approximately 20%of total volume)
Other parameters
SA/DA' 1.95 (surface area to drainage area ratio from DWQ table)
Diameter of Orifice 2.0 in. (2 to 5 day temporary pool draw-down required)
Design Rainfall 1.0 in.
Design TSS Remova12 90 % (minimum 85%required)

Footnotes:
I. When using the Division SAIDA tables,the correct SAIDA 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. In the 20 coastal counties,the requirement for a vegetative filter may be waived if the wet detention basin is designed to provide
90%TSS removal. The NCDENR BMP manual provides design tables for both 85%TSS removal and 90%TSS removal.
II. REQUIRED ITEMS CHECKLIST
The following checklist outlines design requirements per the Stormwater Best Management Practices Manual
(N.C. Department of Environment, Health and Natural Resources, February 1999) 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.
Ap ants Initials
a. The permanent pool depth is between 3 and 6 feet(required minimum of 3 feet).
?J/V b. The forebay volume is approximately equal to 20% of the total basin volume.
f %t c. The temporary pool controls runoff from the design storm event.
d. The temporary pool draws down in 2 to 5 days.
e. If required, a 30-foot vegetative filter is provided at the outlet(include non-erosive flow
calculations).
£ The basin length to width ratio is greater than 3:1.
g. The basin side slopes above the permanent pool are no steeper than 3:1.
It. A submerged and vegetated perimeter shelf with a slope of 6:1 or less (show detail).
i. Vegetative cover above the permanent pool elevation is specified.
3. A trash rack or similar device is provided for both the overflow and orifice.
k. A recorded drainage easement is provided for each basin including access to nearest right-
of-way.
1. 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
in. A mechanism is specified which will drain the basin for maintenance or an emergency.
*A Pump will be provided to drain the basin for maintenance or emergencies.
III. WET DETENTION BASIN OPERATION AND MAINTENANCE AGREEMENT
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 X does not incorporate a vegetated filter at the outlet.
This system (check one) 0 does X does not incorporate pretreatment other than a forebay.

Maintenance activities shall be performed as follows:
I. After every significant runoff producing rainfall event and at least monthly:
a. Inspect the wet detention system for sediment accumulation, erosion, trash accumulation,
vegetated 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 as designed.
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 (see diagram below). 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 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 3.9 feet in the main pond, the sediment shall be removed.
When the permanent pool depth reads 2.25 feet in the forebay, the sediment shall be removed.
BASIN DIAGRAM
(fill in the blanks)
Permanent Pool Elevation 24.2
Sediment R moval EL 2 L95 f5o� Sediment Removal Elevation 20.3 75%Bottom evation 21.2 ----------------------
Bottom Elevation 19 25°/
FOREBAY MAIN POND
5. Remove cattails and other indigenous wetland plants when they cover 50% of the basin surface. These
plants shall be encouraged to grow along the vegetated shelf and forebay berm.
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 comp6nents 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 seven
maintenance procedures listed above. I agree to notify DWQ of any problems with the system or prior to any
changes to the system or responsible party.
Print name: Norman Sneeden/Hermitage Park Warehousing
Title: Owner
Address: P.O. Box 1509, Wrightsville Beach, NC 28480
Phone: [phone]
Signature:
Date: //-
Note: The legally responsible party should not be a homeowners association unless more than 50%of the lots have been sold and
a resident of three subdivision has been named the president.
1, 71 2fj(A 1.� KK (I— , a Notary Public for the State of North Carolina
County of �/1&TY. , do hereby certify that Norman Sneeden
personally appeared before me this q U day of CVCAOb!L , 2002 and acknowledge the due
execution of the forgoing wet detention basin maintenance requirements. Witness my hand and official seal,
OTARy9�
?may`• A(lt3t_IG •`•Vc
ipll❑IIIIIP\\"\
SEAL
My commission expires In—]5-- 0(

Job No. 0S( 07
Date: 05 40&P
TRIPP ENGINEERING, P.C.
419 Chestnut Street, Wilmington, NC 28401
Phone: [phone] • FAX: [phone]
Email: [e-mail] ��rY �T
,6
LETTER OF TRANSMITTAL
To: ---
Attention: LINDA L F-w►S
Subject: SWq ociOgZg 14remITAGE pAxK xr
FAX TRANSMITTAL: NUMBER OF PAGES INCLUDES COVER _
I am sending you: ( ✓'ATTACHED ( ) UNDER SEPARATE COVER
( ) Prints ( ) Tracings ( ) Copy of letter ( ) Specifications (✓J Other
Copies Item No Description
Z PONO CALLS
These are transmitted as checked below:
( ) For Approval (►/'For Your Use ( ) Sign & Return ( ) Review
Remarks: TaAM14S ,
cc:
Signed:

8252006 Heritage Park Warehouse Expansion III 05107
JWH Stormwater Calculations
IF Total Draina a Area
ft. acres
361,548 1 8.30
Ira ious Area
Land Use s acres
Future Impervious 14,594 0.34
Buildings 74,040 1.70 %impervious= 0.365
Gravel/Parking/Concrete 43,262 0.99 = 36.5%
Total 1 131896 3.03 my 37.0%
Stomnvater Calculations:
Time of Concentration:
Hydraulic Length(L)= 1,300 R.
change in Height(H)= 4.5 ft.
To = (L'/H)-p6 1128
= 17.29 min. CPRE= 0.25
CMST= (%imp.)(.95)+(1%imp.)(.25)
Flow for 10 year,6 hour Storm(Qta): - 0.51
QPRE_ (CRRE)x(Ito)x(Area) 110= 6.30 m/hr
13.07 cfs 1n= 7.13 in/hr
QPoST- (CP T)x(I10)x(A-)
26.67 cis Flow for 25 year,6 hour Storm(Qn):
QP E_ (CmE)x(125)x(Area)
Soil Stora a Capacity for 10 year Storm: = 14.79 cis
CN= (98)(%imp.)+(60)(1-%imp.) QPoST= (Cros)x(125)x(Area)
74 - 30.18 cis
P= 4.82 in. fort Oyr,6 hr storm
S= 1000/CN-10 Soil Storage Capacity for 25 year Storm:
= 3,51 CN= (98)(%imp.)+(60)(1-%imp.)
Depth(D)= [P-(0-2)(S)12/[P+(0.8)(S)1 = 74
2.22 in. P= 5.71 in. for 25 yr,6 hr storm
S= 1000/CN-10 '
Time to Peak Flow. - 3.51
TP_ [(43.5)(D)(Area)]/Q2.P T Depth(D)= [P-(0.2)(S)]`/[P+(0.8)(S)]
30.08 min. 2.94 in.
Detention Pond Design Time to Peak Flow
TP= [(43.5)(D)(Area)]/Q,0,,,T
Pond Size: - 35.20 min.
Elevation Surface Area
ft ft.
Normal Pool 24.20 16,963 State Surface Area Requirement at normal pool:
Flood Pool 25.45 18.961 Pond side slopes= 3 :1
Top of Bank 29.20 25.450 Depth below N.P.= 5 ft.
Bottom of Pool 19.00 4,656 SAIDA= 0.0262
(Chart for 90%TSS Removal for Wet Detention
Provided Storage Volume: Pond without Vegetabve Filter
Vol._ [(Normal pool SA+Flood Pool SA)121 Re
quired SA= (SA/DA)x(Total Drainage Area)
x(F.P.elev.-N.P.elev.) - 9.473 s .ft.
22.453 cu.ft.
State Volume Required for Storage of first 1"of runoff.
Vol.= [(1/12)x(DA)x(%imp.)]+
111111/ [(1/12)x(DA)x(1-%imp.)x C]
I.-0A Cq R�p��` = 14,819 oU ft.
...........
S
S y-V:Y =
SEAL
0 17374
z? ; ac
�,�p'• • NEER 4Z:
. �� GR•
�RI 11,r
8' Z�A'D 0(c:l,
05107pond 1 of 2

v
Pi
0
JA32
ti

8/252006 Hennitage Park Warehouse Expansion III 05107
JVVFf Stomm ater Calculations
Ports Volume:
Botlom SA= 4,656 sq.It.
Normal Pool SA= 16,963 sq.ft.
Vol._ ((N.P.SA+Bottom SA)/21 x(N.P.el.-Bottom el.)
59,452 w.ft.
Forebav:
Required Volume Provided Volume
Vol.= 20%of total permanent storage volume Bottom SA= 3,002 sq.ft.
11,890 w.ft. Normal Pool SA= 5,581 s .ft.
Vol._ [(N.P.SA+Bottom SA)/21 x(N.P.el.-Bottom el.)
12,875 cu.ft+
depth= 3 ft.
Outlet Structure Desigm
Flow for 2-day drawdown: Flow for 5-day drawdown:
for 1 st 1"of stomm ter, for 1 st 1"of stonnwater,
Q= Required Vol.1172,800 sec.(2-days) Q= Required Vol./432,000 sec.(5days)
= 0.086 cfs = 0.034 Cis
Required Area of Pipe for 2-day drawdown: Required Area of Pipe for 5-day drawdown:
A= Q/[CdxSQRT(2xgxh)] A= Q/[Cdx SQRT(2xgxh)]
Cd= 0.6 Cd= 0.6
9= 32.2 ft./s' g= 32.2 ft/s'
h= (F.P.elev.-N.P.elev.)2 h= (F.P.elev.-N.P.elev.)/2
0.625 IL = 0.625 ft.
A= 0.0225 sq.R A= 0.0090 sq.ft.
Diameter of Pipe for 2-day drawdown: Diameter of Pipe for 5-cav drawdown:
DIA.= SQRT[(A x 4)/pi] DIA.= SQRT[(A x 4)/pi]
0.1694 ft. = 0.1071 ft.
2.03 in. = 1.29 in.
'Use:2 in diameter pipe
Outlet Structure Check:
Using a 4'x 4'Basin,
Perimeter L = 16 ft.
Q= CIA
C= (%imp.)(.95)+(1%imp.)(.25)
= 0.51
1= 7.13 in.for a 25 yr.Storm
A= 8.30 Acres
30A8 cis
Q= Cwx L x H''
H= (Q/(CwxQj]
Cw= 3
0.73 ft.
Peak elevation= flood pool elevation+H
26.18 ft.
05107pond 2 of 2

WS 2006 Hermitage Park Warehouse Expansion III 05107
JWdi Stormwater Calculations
Total Drainage Area
R acres
361,548 8.30
Irr ions Area
Land Use s .ft. acres
Future Im rvious 14,594 0.34
Buildings 74,040 1.70 %impervious= 0.365
Gravel/Parkin /Concrete 43,262 0.99 = 36.5%
Total 131896 1 3.03 say 37.0%
Stomvwater Calculafions:
Time of Concentration:
Hydraulic Length(L)= 1.300 ft.
change in Height(H)= 4.5 ft.
Tc = (L'M)-/128
17.29 min. CME= 0.25
Crow= (%imp.)(.95)+(1-%imp.)(.25)
Flow for 10 year,6 hour Storm(010): = 0.51
Q-_ (CmE)x(110)x(Area) Ira= 6.30 in/hr
13,07 cfs 125= 7.13 in/hr
QP Sr= (Crow)x Om)x(Area)
= 26.67 ofs Flow for 25 year,6 hour Storm(Q25):
QPRE- (CPRE)x(125)X(Area)
Soil Slora a Capacity for 10 year Storm: = 14.79 cfs
CN= (98)(%imp.)+(60)(l-%imp.) QPosr= (Cr T)x(125)x(Area)
74 - 30.18 cfs
P= 4.82 in. forl Oyr,6 hr storm
S= 1000/CN-10 Soil Storage Capacitv for 25 year Storm:
3.51 CN= (98)(%imp.)+(60)(1%imp.)
Depth(D)= [P-(0.2)(S)]2I]P+(0.8)(S)I = 74
2.22 in. P= 5.71 in. for 25 yr,6 hr storm
S= 1000/CN-10
Time to Peak Flow: = 3.51
TP= ((43.5)(Drea)]/Q2.POsi Depth(D)= [P-(0.2)(S)]`/[P+(0.8)(S)]
30.08)(A min. - 2.94 in.
Detention Pond Design Time to Peak Flay:
Tr= ((43.5)(D)(Area)]/Q10, o 7
Pond Size: - 35.20 min.
Elevation Surface Area
ft. ft.
Normal Pool 24,20 16,963 State Surface Area Requirement at normalpool:
Flood Pool 25.45 18.961 Pond side slopes= 3 :1
To of Bank 29.20 25.450 Depth below N.P.= 5 ft.
Bottom of Pool 19.00 4,656 SA/DA= 0,0262
(Chart for 90%TSS Removal for Wet Detention
Provided Storage Volume: Pond without Vegetative Filter
Vol._ [(Normal pool SA+Flood Pool SA)/2] Required SA= (SAIDA)x(Total Drainage Area)
x(F.P.elev.-N.P.elev.) - 9,473 s .ft.
22.453 cu.ft.
State Volume Re uired for Storage of first 1"of runoff:
Vol.= ((1/12)x(DA)x I%imp.))+
((1/12x( )x(1-%imp.)xC]
C 02
• ES•• 0 ��� = 14.819 ca.ft.,�pF S/N..
t o yIF 7
[i SEAL r
17374
Q '
S� ZS�o�
05107pond 1 of 2

'v
o � LCoCi J'
ip . "�

8252006 Hermitage Park Warehouse Expansion III 05107
JWH Stormwater Calculations
Pond Volume:
Bottom SA= 4,656 sq.ft
Normal Pod SA= 16,963 sq.ft.
Vol._ [(N.P.SA+Bottom SA)/21 x(N.P.el.-Bottom el.)
59.452 cu.R
o F
Required Volume Provided Volume
Vol.= 20%of total permenant storage volume Bottom SA= 3.002 sq.ft.
11,890 cu.IL Normal Pool SA= 5,581 sq.ft.
Vol.= [(N.P.SA+Bottom SA)/21 x(N.P.el.-Bottom el.)
12,875 cu.ft.
depth= 3 ft.
Outlet Structure Design:
Flow for 2-day drawdown: Flow for 5-day drawdown:
for 1st 1"of stormwater, for 1st 1"of storrwlater,
Q= Required Vol./172,800 sec.(2-days) Q= Required Vol./432.000 sec.(5-days)
0.086 cfs = 0.034 cfs
Required Area of Pipe for 2-day drawdown: Required Area of Pipe for 5-day drawdown:
A= Q/[Cdx SQRT(2xgxh)] A= Q/fCdx SQRT(2xgxh)]
Cd= 0.6 Cd= 0.6
g= 32.2 ft./s' g= 32.2 ft./s'
h= (F.P.elev.-N.P.elev.)2 h= (F.P.elev.-N.P.elev.)/2
0.625 ft = 0.625 ft.
A= 0.0225 sq.ft A= 0.0090 sq.ft.
Diameter of Pipe for 2-day drawdowm Diameter of Pipe for 5-day drawdown:
OIA.= SQRT[(A x 4)/pi] DIA.= SQRT[(A x 4)/pi]
0.1694 ft. = 0.1071 R
2.03 in. = 1.29 in.
'Use:2 in diameter 2ipe
Outlet Structure Check:
Using a 4'x 4'Basin,
Penmeter L = 16 ft.
Q= CIA
C= (%imp.)(.95)+(1-%imp.)(.25)
= 0.51
1= 7.13 in.for a 25 yr.Storm
A= 8.30 Acres
30A8 cfs
Q= Cwx Lx H"
H= [Q/(Cw x L)]°
Cw= 3
0.73 ft.
Peak elevation= flood pool elevation+H
26,18 ft.
05107pond 2 of 2

TRwp ENGINEERING, P.C.
0 419 Chestnut Street
Wilmington, North Carolina 28401
Phone: [phone] • FAX: [phone]
June 7, 2006
NCDENR JUN lv�b
Division Water Quality 082006
127 Cardinal Drive
Wilmington, NC 28405-3845
Attn: Ms. Linda Lewis
Re: Hermitage Park Warehouse Expansion III
Project No. SW8 000824
TE 05107
Dear Linda:
In response to your email comments dated June 2, 2006, we offer the following:
1. Pages 1 and 3 are updated and enclosed.
2. A highlighted C I is enclosed.
3. Two (2) copies of C2 have been updated and enclosed.
4. The proposed waste area is for bad soil from the pond that was built on the
neighboring site. The owner instead placed the material from the pond on
3927 Blue Clay Road, essentially rendering the waste site unnecessary. The
dark dashed line marks the limits of disturbance. The gravel boundaries have
been darkened to make them easier to differentiate from grass. There is no
asphalt on this site.
Sincerely,
Tripp Engineering, P.C.
Jonathan W. Ham, E.I.
JWH:dcb
Enc.

Re: Hermitage Park III SW8 000824 Mod.
Subject: Re: Hermitage Park III SW8 000824 Mod.
From: Linda Lewis <[e-mail]>
Date: Fri, 02 Jun 2006 08:21:13 -0400
To: Jonathan Ham <[e-mail]>
Jonathan:
Thanks for bringing me up to speed. I still have a few questions:
1. The revised calculations aren't matching up with the supplement form that was
submitted in December, 2005. It appears that the changes are in the permanent pool
and temporary pool elevations, the permanent pool surface area, and the permanent
pool, temporary pool and forebay volumes. Please submit revised pages 1 and 3. I
can use the original pages 2 & 4 so that you won't have to get Mr. Sneeden's
signature again.
2 . Is the drainage area map that was approved on October 21, 2002, still valid? It
does not appear to take into account the driveway connections that extend over the
property line. I think a revised drainage area delineation is needed which shows
the drainage area extending over the property line where the new driveways will be.
3 . Please submit 2 copies of the revised detail sheet reflecting revised pond
section and outlet structure details for the new pond design parameters.
4. The plans show a proposed waste area for "material from 3927 Blue Clay Road"
located behind the north building. How will this area be accessed? The plans are
not very clear in showing the extent of gravel drives and parking areas nor any
proposed spot elevations for said gravel/parking areas, especially adjacent the
north building Is it possible to remove the dark dashed line on sheet Cl and
somehow emphasize the boundaries of the gravel, asphalt, and parking areas that
will be draining to this pond?
Linda
Jonathan Ham wrote:
Linda:
I 'm very sorry if I have confused you. The reason a survey was ordered was that
New Hanover County requested a stormwater certification for the existing site
before the proposed 70' by 30' expansion could be permitted. We have since
received the survey information, updated it and the plans are before you. The
state certification is for TE02034, which includes the building to the
northwest. My draftsman forgot to remove the "proposed" tag on that particular
building, and I apologize for that confusion. There was only slated to be one
pond on this site, and it was designed to handle more impervious than is
actually out there. I was simply sending you the most recent plans so we can
resume the permitting process for the 70' by 30' addition in the southwest
corner of the site.
Please call me if you have any questions, and if necessary I will be happy to
meet with you in person to further explain the project in its entirety. Thank
you so much for all of your help and I look forward to talking to you again
soon!
Thanks!
Jonathan
Jonathan W. Ham, E.I.
Civil Engineering
I of 2 6/2/2006 10:09 AM

Re: Hermitage Park III SW8 000824 Mod.
Tripp Engineering, P.C.
419 Chestnut Street
Wilmington, NC 28401
(910) -763-5100
Express yourself instantly with MSN Messenger! Download today - it's FREE!
http://messenger.msn.click-url.com/go/onm00200471ave/direct/ol/
2 of 2 6/2/2006 10:09 AM

RE: Hermitage Park III SW8 000824 Mod.
Of ..
Subject: RE: Hermitage Park III SW8 000824 Mod.
From: "Jonathan Ham" <[e-mail]>
Date: Thu, 01 Jun 2006 14:14:39 -0400
To: [e-mail]
Linda:
I'm very sorry if I have confused you. The reason a survey was ordered was that
New Hanover County requested a storniwater certification for the existing site
before the proposed 70' by 30' expansion could be permitted. We have 'since
received the survey information, updated it and the plans are before you. The
state certification is for TE02034, which includes the building to the northwest.
My draftsman forgot to remove the "proposed" tag on that particular building, and I
apologize for that confusion. There was only slated to be one pond on this site,
and it was designed to handle more impervious than is actually out there. I was
simply sending you the most recent plans so we can resume the permitting process
for the 70' by 30' addition in the southwest corner of the site.
Please call me if you have any questions, and if necessary I will be happy to meet
with you in person to further explain the project in its entirety. Thank you so
much for all of your help and I look forward to talking to you again soon!
Thanks!
Jonathan
Jonathan W. Ham, E.I.
Civil Engineering
Tripp Engineering, P.C.
419 Chestnut Street
Wilmington, NC 28401
(910) -763-5100
Express yourself instantly with MSN Messenger! Download today - it's FREE!
http://messenger.msn.click-url.com/go/onm00200471ave/direct/ol/
I of 1 6/1/2006 2:32 PM

Hermitage Park III SW8 000824 Mod.
Subject: Hermitage Park III SW8 000824 Mod.
From: Linda Lewis <[e-mail]>
Date: Thu, 01 Jun 2006 12:13:40 -0400
To: Jonathan Ham<[e-mail]>
CC: Tripp Engineering<[e-mail]>
Jonathan:
I 'm very confused. The last I heard, this project was on hold (at your request fax
dated 3/10/2006) , and now you're sending me a Designer's Certification for the
expansion which hasn't been permitted yet? Am I missing something?
Is the new expansion which is northwest of the original project, still being
proposed, or has it already been built without a permit? The plans that were
submitted in December, 2005, show the existing previously permitted pond and a new
pond for the expansion. The certification appears to cover both the previously
permitted pond and the new one, which hasn't received a permit yet.
Please advise.
Thanks,
Linda
I of 1 6/1/2006 12:13 PM

TRIPP ENGINEERING, P.C.
0 419 Chestnut Street
Wilmington, North Carolina 28401
Phone: [phone] • FAX: [phone]
May 24, 2006
NCDENR
Division Water Quality
127 Cardinal Drive
Wilmington,NC 28405-3845
Attn: Ms. Linda Lewis
Re: Hermitage Park Warehouse Expansion III
Project No. SW8 000824
TE 05107
Dear Linda:
Enclosed please find two (2) sets of revised plans, calculations and engineer's
certification for the above referenced project. The pond has been revised to reflect the
asbuilt survey. Please review for approval and contact us with any questions, comments
or if you need additional information. Thank you.
Sincerely,
Tripp Engineering, P.C.
Jonathan W. Ham, E.I.
JWH:dcb
Enc.
CEIV.
MAY 2 5 7u:
BY:

}
5/222006 Hermitage
Park W r ehouseCalmlaRnsion III ',E C E I VE D 05107
ons
Total Drainage Area MAY 2 5 2006
ft. acres
361,548 1 8.30
DWQ
Impervious Area 'oROJ#
Land Use sq.ft. acres
Future Impervious 14,594 0.34
Buildings 74 040 1.70 %impervious= 0.365
Gravel/Parkin /Concrete 43.262 0.99 = 36.5%
Total 131,896 3.03 sa 37.0%
Stormwater Calwlations:
Time of Concentmbon:
R
ft
(Hydraulic Length(L)= 1,300 .
change in Height(H)= 4.5 .
Tc = (1-6/H)'-112
8
17.29 min. Cv = 0.25
CRosr= (%imp.)(.95)+(1-%imp.)(.25)
Flow for 10 year,6 hour Storm(Q,0): = Ml
FQvRe= (CRRe)x(110)x(Area) 1,0= 6.30 in/hr
= 13.07 cfs 1n= 7.13 in/hr
Q'::T= (Ca ST)x(110)x(Area)
= 26.67 cfs Flow for 25 year,6 hour Storm(Q25):
QME_ (CPRE)x(125)x(Area)
Soil Storage Capacity for 10 year Storm: = 14.79 cfs
CN= (98)(%imp.)+(60)(1-%imp.) QPoST= (CPo T)x(In)x(Area)
= 74 - 30.18 cfs
P= 4.82 in. furl Oyr,6 hr stoml
S= 1000/CN-10 Soil Storage Capacity for 25 year Storm:
3.51 CN= (98)(%imp.)+(60)(1-%imp.)
Depth(D)= [P-(0.2)(S)]2/(P+(0.8)(S)] = 74
= 2.22 in. P= 5.71 in. for 25 yr,6 hr storm
S= 1000/CN-10
Time to Peak Flow: = 3.51
TR= [(43.5)(D)(Area)]102, Depth(D)= [P-(0.2)(S)1'/[P+(0.8)(S)I
30.08 min. - 2.94 in.
Detention Pond Design: Time to Peak Flrnr.
TR= I(43.5)(D)(Area)1/Q,a.vosT
Pond Size: = 35.20 min. O
Elevation Surface Area
ft. ft. �•
Normal Pool 24.20 16,963 State Surface Area Requirement at normal wl:
Flood Pool 25.45 18,961 Pond side slopes-
Top of Bank 29.20 25,450 Depth below N.P.=
Bottom of Pool 19.00 4,656 SA/DA= 0,019 2,
(Chart for 90%TSS Removal for Wet Detention
Provided Storage Volume: Pond without Vegetative Filter
Vol._ [(Normal pool SA+Flood Pool SA)121 Required SA= (SAIDA)x(Total Drainage Area)
x(F.P.elev.-N.P.elev.) - 7,050 s .ft.
22,453 w.ft.
State Volume Required for Storage of first 1"of runoff.
\\I1111/l/ Vol.= [(1/12)x(DA)x(%imp.)]+
`` k� `,Ai /*' ' I(1/12C=(02 x(1-%imP.)xC1
= 14,819 cu.R.
=•a�pE l��Ysi9
SEAL ip
= v 17374 ty
Z
05107pond 1 of 2

I t
5222006 Heritage Park Warehouse Expansion III 05107
JWH Storwater Calculations
Pond Volume:
Bottom SA= 4,656 sq.IL
Nora,Pod SA= 16,963 sq.fL
Vol._ [(N.P.SA+Bottom SA)/2]x(N.P.el.-Bottom el.)
59,452 cu.ft.
ForFFw
Required Volume Provided Volume
Vol.= 20%of total perenant storage volume Bottom SA= 3.002 sq.ft.
11,890 cu.ft. Normal Pool SA= 5.581 sq.ft.
Vol._ [(N.P.SA+Bottom SA)/21 x(N.P.el.-Bottom el.)
12,875 cu.ft.
depth= 3 fL
Outlet Structure Design:
Flow for 2-day drawdown: Flow for 5-day drawdown:
for 1st l"of storwater, for 1st 1"of stom%vater,
Q= Required Vol./W2,800 sec.(2-days) 0= Required Vol.1432,000 sec.(5days)
0.086 cfs = 0.034 cfs
Required Area of Pipe for 2-day drawdown: Required Area of Pipe for 5-day drawdown:
Q/[Cdx SQRT(2xgxh)) A= O/[Cdx SQRT(2xgxh)]
Cd= 0.6 Cd= 0.6
9= 32.2 ft./s' .. - 9= 32.2 ft./s2
h= (F.P.elev.-N.P.elev.)2 h= (F.P.elev.-N.P.elev.)12
0.625 IL = 0.625 ft.
E-A
0.0225 sq.ft. A= 0.0090 s .ft.
Diameter of Pipe for 2-day drawdown: Diameter of Pipe for 5-day drawdown:
DIA.= SQRT[(A x 4)/pi] DIA.= SQRT[(A x 4)/pi]
= 0.1694 fL = 0.1071 ft.
2.03 in. = 1.29 in.
'Use:2 in diameter pipe
Outlet Structure Check:
Using a 4'x 4'Basin,
Perimeter L = 16 ft.
0= CIA
C= (%imp.)(.95)+(1%imp.)(.25)
= 0.51
1= 7.13 in.for a 25 yr.Storm
A= 8.30 Acres
30.18 cfs
Q= Cwx Lx H'
H= [Q/(Cw x L)]�
Cw= 3
0.73 ft.
Peak elevation= flood pool elevation+H
26.18 ft.
05107pond 2 of 2

MAR 10,2006 10:47A Tripp Engineering 9107635631 page 1
Job No. 05-I0 7
Date: 30
TRIPP ENGINEERING, P.C.
419 Chestnut Street, Wilmington, NC 28401
Phone: [phone] • PAX [phone]
Email: trippeng@a,ec.rr.com
LETTER OF TRANSMITTAL
To: �('�EN►�'
Attention: LINDA LF_1 i S
subject: 51/A 000gZ44 NEPM1746t DA —
vl�FAX TRANSMITTAL: NUMBER OF PAGES INCLUDES COVER Z
I am sending you: ( ✓)'ATTACHED ( ) UNDER SEPARATE COVER
( ) Prints ( ) Tracings ( Ircopy of letter ( ) Specifications ( ) Other
Copies Item No Description _
r ' Letri:,e.
These are transmitted as checked below:
( ) For Approval ( ) For Your Use ( ) Sign & Return ( ) Review
Remarks:—E-F,A5,ti t'_AL-c- Id/rd &jY 7/4) )S. _.
cc:
i
Signed �� 1�

MAR 10,2006 10:47A Tripp Engineering 9107635631 page 2
TRIPP ENGINEERING, P.C.
419 Chestnut Street
Wilmington, North Carolina 2MOI
Phone: [phone] • PAX: [phone]
March 10, 2006
NCDENR
Division Water Quality
127 Cardinal Drive
Wilmington, NC 28405-3845
Attn: Ms. Linda Lewis
Re: Hermitage Park Warehouse Expansion III
Project No. SW8 000824
TE 05107
Dear Linda:
We hereby submit this request to put a hold on this project. A new site survey
has been requested and a new site plan is currently being developed. We anticipate this
plan being completed and submitted back to your office by June 10, 2006. Please
contact us with any questions, comments or if you need additional information. Thank
you.
Sincerely,
Tripp Engineering,P.C.40*'
Jonathan W. Ham, E.I.
JWI I:dcb
Enc.

t
Tmpp ENGINEERING, P.C.
0 419 Chestnut Street
Wilmington, North Carolina 28401 :t'
Phone: [phone] • FAX: [phone]
DEI: ,
BY:
DecembeZ2, 2005 6
�� 04 '�-8CEIVED
NCDENR DEC 3 t1 l005
Division Water Quality
127 Cardinal Drive BY:
Wilmington, NC 28405-3845
Attn: Ms. Linda Lewis
Re: Hermitage Park Warehouse Expansion III
Project No. SW8 000824 Mod
TE 05107
Dear Linda:
In response to your correspondence dated November 21, 2005, we offer the
following:
1. The application for modification is enclosed.
2. The wet detention supplement is enclosed.
3. The required fee of$420 is enclosed.
4. All gravel drives have been dimensioned.
5. Grading has been added.
6. New calculations and drainage plans are enclosed.
Please review for approval and contact us with any questions, comments or if
you need additional information. Thank you.
Sincerely,
Tripp Engineering, P.C.
1/.
Jonathan W. Ham, E.I.
JWH:dcb
Enc.

%ZECEIVELD
DEC 3 0 2005
BY: j ✓8��2y d.
November 30, 2005 TE 05107
Stormwater Narrative
Hermitage Park Warehouse Expansion III
New Hanover County,NC
Hermitage Park Warehouse Expansion III is a pre-existing commercial site of 8.50 acres.
This project is a modification of the existing stormwater permit, number SW8 000824.
The tract is zoned industrial. Three structures currently exist on site, three warehouse
buildings along with gravel parking and access. The existing impervious area is 2.61
acres. The proposed expansion includes a 2,100 sf building addition, 880 sf of concrete,
and 3,840 sf of gravel access brings the total impervious area to 120,490 sf. The existing
permit, SW8 000824, allowed for 131,896 sf of impervious area. Since we are remaining
under that previous amount, we propose that the remaining 11,406 sf of permitted
impervious area be considered future area.
The existing stormwater pond is sized to treat the existing impervious area and in addition
is sized to handle more than the proposed additional impervious area. Outflow will
discharge through existing ditches to an unknown tributary to Prince George Creek,
classification C-SW.

�0F WIN ATF90 Michael F. Easley, Governor
�O G William G. Ross, Jr., Secretary
North Carolina Department of Environment and Natural Resources
1 y
Alan W. Klimek, P.E. Director
Division of Water Quality
November 21, 2005
Mr. Norman Sneeden
PO Box 1509
Wrightsville Beach, NC 28480
Project Name: Hermitage Park Warehouse
County: New Hanover County
Project Number: SW8 000824 Mod.
Dear Mr. Sneeden:
Your recent submission of revised plans regarding the subject stormwater management permit
is being returned because the application lacked the necessary basic elements to accept it for
review. The plans and any other documentation that were submitted have been discarded or
recycled, as appropriate. Please address the following noted deficiencies and provide the
requested information:
® The original permit did not make any allocation for future development. The project was
permitted with the understanding that the built-upon area numbers reported on the
application were for the permitted condition. The buildings comprised 79,980 ft2 and the
parking comprised 51 916 ft2. In order to now reduce these numbers so that a future
allocation of 11,406 ft� is created, a permit modification will be required. Please submit a
completed and signed March, 1999, version or higher, permit application with an original
signature.
Please submit a new wet detention supplement form, March, 1999 version or higher,
Please submit the required permit fee of $420.00.
There are three new gravel drives proposed, but only two have been dimensioned.
Please add proposed grading for the driveways showing how the runoff will be directed
into the stormwater collection system.
® Please submit new, revised and sealed pond design calculations due to the possibility
of an increased drainage area. Two of the proposed gravel drives will extend over onto
property that was not originally part of the approved drainage area for this project.
Please revise the drainage area for calculation purposes and provide a new drainage
area delineation map.
Please resubmit the permit application package to the address below. Note that the 90-day
statutory permit review time begins upon receipt of a complete application. If you have any
questions, please do not hesitate to call me at [phone].
Sincerely,
Linda Lewis
Environmental Engineer
cc: Jonathan Ham, Tripp Engineering
Linda Lewis
ENB/arl: S:\WQS\STORMWAT\RETURN\000824Mod.nov05
North Carolina Division of Water Quality 127 Cardinal Drive Extension Phone[phone] Customer Service1-877623-6748 One
Wilmington Regional Office Wilmington,NC 28405-3845 FAX [phone] Internet h2o.encstate.nc.us NotthCarolina
An Equal Opportunity/Affirmative Action Employer—50%Recycled/10%Post Consumer Paper Natcrrally

TRwp ENGINEERING, P.C.
0 419 Chestnut Street
Wilmington, North Carolina 28401
Phone: [phone] • FAX: [phone] .
November 15, 2005
NCDENR y ��
Division Water Quality pV�,
127 Cardinal Drive NU V 1 7 2005
Wilmington, NC 28405-3845
By:_
Attn: Ms. Linda Lewis
_
Re: Hermitage Park Warehouse Expansion III
Project No. SW8 000824
TE 05107
Dear Linda:
Enclosed please find two (2) sets of revised plans and a detailed narrative for the
above referenced project. The proposed expansion will not exceed the impervious area
allocated under existing permit SW8 000824. Please contact us with any questions,
comments or if you need additional information. Thank you.
Sincerely,
Tripp Engineering, P.C.
W
Jonathan W. Ham, E.I.
JWH:dcb
Enc.

November 7, 2005 TE 05107
Stormwater Narrative
Hermitage Park Warehouse Expansion III
New Hanover County, NC
Hermitage Park Warehouse Expansion III is a pre-existing commercial site of 8.50 acres.
This project is a modification of the existing stormwater permit, number SW8 000824.
The tract is zoned industrial. Three structures currently exist on site, three warehouse
buildings along with gravel parking and access. The existing impervious area is 2.61
acres. The proposed expansion includes a 2,100 sf building addition, 880 sf of concrete,
and 3,840 sf of gravel access brings the total impervious area to 120,490 sf. The existing
permit, SW8 000824, allowed for 131,896 sf of impervious area. Since we are remaining
under that previous amount, we propose that the remaining 11,406 sf of permitted
impervious area be considered future area.
The existing stormwater pond is sized to treat the existing impervious area and in addition
is sized to handle more than the proposed additional impervious area. Outflow will
discharge through existing ditches to an unknown tributary to Prince George Creek,
classification C-SW.

TRII'P ENGINEERING, P.C.
0 419 Chestnut Street
Wilmington, North Carolina 28401
Phone: [phone] • FAX: [phone]
November 3, 2005 �� Piw-
NCDENR
Division Water Quality ��
127 Cardinal Drive g>�
Wilmington, NC 28405-3845 N0V G �
&y. «uS
Attn: Ms. Linda Lewis \
Re: Hermitage Park Warehouse Expansion
SW8 000824 MOD
New Hanover County, NC
TE 05107
Dear Linda:
Enclosed please find two (2) sets of revised plans for the above referenced
project. This site was originally permitted for 131,896 sf of impervious on October 20,
2002. The actual impervious area on the site is currently 113,670 sf. Our proposed
impervious area for this portion of the project includes 2,100 sf of building, 880 sf of
concrete and 3,840 sf of gravel. This additional impervious brings the total impervious
area to 120,490 sf.
We would like to allocate the additional 11,406 sf of impervious as future area.
The existing pond and drainage system will not change, with only an extension of the
roof drain system to handle the new addition.
Please review for approval and contact us with any questions, comments or if
you need additional information. Thank you.
Sincerely,
Tripp Engineering, P.C.
Jonathan W. Ham, E.I.
JWH:dcb
Enc.