SW8070667_HISTORICAL FILE_20070802

STORMWATER DIVISION CODING SHEET
POST -CONSTRUCTION PERMITS
PERMIT NO
SW8 O-101sLo-1
DOC TYPE
❑ CURRENT PERMIT
❑ APPROVED PLANS
HISTORICAL FILE
❑ COMPLIANCE EVALUATION INSPECTION
DOC DATE
2 c) o-1 og o2
YYYYMMDD

(J
Y
August 2, 2007
Chad O'Shields, Member Manager
Pierpoint Properties, LLC
--s 301 Pierpoint Drive _--
Wilmington, NC 28411
Subject: Stormwater Permit No SW8 070667
-� Alamance Subdivision -
High Density Subdivision Project
New Hanover County
Dear Mr O'Shields
Michael F Easley, Governor
William G Ross Jr, Secretary
North Carolina Department of Environment and Natural Resources
Coleen H Sullins, Director
Din ision of A ater Quality
The Wilmington Regional Office received a complete Stormwater Management Permit Application for
Alamance Subdivision on August 2, 2007 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 070667 dated August 2, 2007, for the construction of the
project, Alamance Subdivision
This permit shall be effective from the date of issuance until August 2, 2017, 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 manage,nent system will, result it-, future compliance problems
If any parts, requirements, or limitations contained in this permit are unacceptable, you have the right to
request an adludicatory 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 Rhonda
Hall, or me at [phone]
S*incerely,
l�
e.Edward Beck ll
Regional Supervisor
Surface Water Protection
Section
ENB/rbh S \WQS\STORMWATER\PERMIT\070667 aug07
cc Charles D Cazier, Tripp Engineering, P C
New Hanover County Inspections
City of Wilmington Stormwater Services
Beth E Wetherill, New Hanover County Engineering
Division of Coastal Management
Rhonda Hall
L Wilmington Regional Office i
Central Files
North Carolina Division of Water Quality 127 Cardinal Drive Extension Wilmington NC 28405 Phone [phone]
Wilmington Regional Office Internet www ncwateruualnv me Fax [phone]
An Equal Opportunity/Affirmative Action Employer — 50% Recycled110% Post Consumer Paper
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7hCarolma
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1 877 623 6748

State Stormwater Management Systems
Permit No SW8 070667
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
Chad O'Shields, Pierpomt Properties, LLC
Alamance Subdivision
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 2, 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 15 on page 3 of this permit The subdivision is
permitted for 9 lots, each allowed a maximum of 5,000 square feet of built -upon
area
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
Page 2 of 9

State Stormwater Management Systems
Permit No SW8 070667
5 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
347
Onsite, ft2
151,153
Offsite, ft2
None
b Total Impervious Surfaces, ft2
55,200
Lots at 5,000 ft2
45,000
Roads/Parking, ft2
10,200
Other, ft2
0
Offsite, ft2
0
c Pond Depth, feet
45
d TSS removal efficiency
90%
e Design Storm
V,
f Permanent Pool Elevation, FMSL
375
g Permitted Surface Area @PP, ft2
8,709
h Permitted Storage Volume, ft3
9,444
1 Storage Elevation, FMSL
385
I Controlling Orifice
k Permanent Pool Volume, ft3
1 Forebay Volume, ft3
m Maximum Fountain Horsepower
n Receiving Stream / River Basin
o Stream Index Number
p Classification of Water Body
II SCHEDULE OF COMPLIANCE
1"0 pipe
22,480
4,722
1/8
Smith Creek / Cape Fear
18-74-63
°C, Sw"
1 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
Page 3 of 9

State Stormwater Management Systems
Permit No SW8 070667
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
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
Page 4 of 9

State Stormwater Management Systems
Permit No SW8 070667
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
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 070667, 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 per lot is 5,000 square feet 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 dram gutters, which dram 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
dram 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
Page 5 of 9

State Stormwater Management Systems
Permit No SW8 070667
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
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 1/8 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 pools
III GENERAL CONDITIONS
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
protect 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
Page 6 of 9

State Stormwater Management Systems
Permit No SW8 070667
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 the 2nd day of August, 2007
NORTH CAROLINA ENVIRONMENTAL MANAGEMENT COMMISSION
/oruoieen h sumns, uir(eotor
Division of Water Quality
By Authority of the Environmental Management Commission
Permit Number SW8 070667
Page 7 of 9

State of North Carolina
Department of Environment and Natural Resources
Division of Water Quality
STORMWATER MANAGEMENT PERMIT APPLICATION FORM
This form may he photocopied for use as an original
I. GENERAL INFORMATION
I Applicants name (specify the name of the corporation, individual, etc who owns the project)
PieMomt Properties LLC
2 Print Owner/Signing Official's name and title (person legally responsible for facility and compliance)
Chad O'Shields Member Manager
3 Mailing Address for person listed in item 2 above
301 Pierpouit Drive
City Wilmington State
Telephone Number 232-7689
Zip 28411
4 Project Name (subdivision, facility, or establishment name — should be consistent with project name on
plans, specifications, letters, operation and maintenance agreements, etc )
Alamance Subdivision
5 Location of Project (street address)
6455 Murrayville Road
City Wilmington County New Hanover
6 Directions to project (from nearest major intersection)
Travel east from the intersection of Murrayvdle Road and Hwy 132 approximately one mile Site is on
7 Latitude N 340 17' 30" Longitude W 770 52' 00" of project
8 Contact person who can answer questions about the project
Name Phillip Tripp Telephone Number 910-763-5100
II PERMIT INFORMATION
1 Specify whether project is (check one) X New Renewal 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 and its issue date (if known)
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 ` Sedimentation/Erosion Control _ 404//401 PermitNPDES Stormwater
Information on required state permits can be obtained by contacting the Customer Service Center at
1-877-623-6748
in. PROJECT INFORMATION
I 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 pond
2 Stormwater runoff from this project drams to the Cape Fear River basin
3 Total Project Area 347 acres
5 How many drainage basins does the project have? I
4 Project Built Upon Area 366 %
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
Smith Creek -(0-1�
Receiving Stream Class
C-SW
Drainage Basin Area
3 47 ac
Existing Impervious * Area
0 sf
Proposed Impervious * Area
1 27 ac
% Impervious* Area (total)
36 6%
Impervious * Surface Area
Drainage Basin I
Drainage Basin 2
On -site Buildings(9@5000sf)
45,000 sf
On -site Streets
10,200 sf
On -site Parking
-
On -site Sidewalks
Other on -site
Off -site
Total
E= 55,200 sf
* 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

7 How was the oft site impervious area listed above derived9
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
I The following covenants are miended to ensure ongoing compliance with state stormwater managementpermit
number 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 square feet of airy 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 otiparrcels orfuture 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 [phone] for
the status and availability of these forms
Form SWU-102
Form SWU-103
Form SWU-104
Form SWU-105
Form SWU-106
Form SWU-107
Form SWU-108
Form SWU-109
Wet Detention Basin Supplement
Infiltration Basin Supplement
Low Density Supplement
Curb Outlet System Supplement
Off -Site System Supplement
Underground Infiltration Trench Supplement
Neuse River Basin Supplement
Innovative Best Management Practice Supplement
Form SWU-101 Version 3 99 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 Regional Office.
l Please indicate that you have provided the following required information by initialing in the space
provided next to each item
Applicant's Initials
• 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)
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) Tripp Engineering, P C
Mailing Address 419 Chestnut Street
City Wilmington State NC Zip 28401
Phone [phone] Fax [phone]
VHI APPLICANT'S CERTIFICATION
1, (print or type name ofperson listed in General Information, item 2) Chad O'Shields
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 recorded, and that the proposed project complies with the requirements of 15A
NCAC 2H 1000
Signature ��,�� Date Z6(]7
Form SWU-101 Version 3 99 Page 4 of 4

DEED RESTRICTIONS
AND PROTECTIVE COVENANTS
I, �- ec2r e[ cknowledge and affirm by my signature below, that I will cause the following deed
restrictions and protective covenants to be recorded prior to the sale of any lot
For All Projects
The following covenants are intended to ensure ongoing compliance with State Stormwater
Management Permit Number as issued by the Division of Water Quality under NCAC
2H 1000
The State of North Carolina is made a beneficiary of these covenants to the extent necessary to
maintain compliance with the stormwater management permit
These covenants are to run with the land and be binding on all persons and parties claiming under
them
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
Alteration of the drainage as shown on the approved plan may not take place without the concurrence
of the Division of Water Quality
VII For High Density Residential Subdivisions (in addition to 1.1-1.5 and all others that apply)
The maximum allowable built -upon area per lot is 5,000 square feet This allotted amount
includes any built -upon area constructed within the lot property boundaries, and that portion of the
nght-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
If the BUA per lot vanes, please record as follows and provide a complete lot listing with proposed BUA
The maximum allowable built -upon area per lot is as follows
Lot # BUA Lot # BUA
Lot # BUA
These allotted amounts include any built -upon area constructed within the lot property boundaries, ano
that portion of the nght-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
2 All runoff from the built -upon areas 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 swa/es to collect lot runoff and directing them into the
stormwater system or into the street Lots that will naturally drain into the system are not required to
provide these additional measures
Signature i�T�-rc �C i _Date G
Name, Title /aErN� 7�f'Sr L(
Company
I`. eb'1U Y1a Notary Public for the State of North Carolina, County of LLLo F-
do hereby certify that ?ATR\GK. C personally appeared before me this k2 day of
TUB J� and acknowledge the due execution of the forgoing instrument Witness my
hand and official seal,
SEAL
Sign-alurlp".�
My commission expires `� 50 2G 1 D _

P. 01
TRANSACTION REPORT
AUG-03-2007 FRI 11:15 AM
FOR: NCDENR 9103502004
SEND
>K >K
DATE START RECEIVER TX TIME PAGES TYPE NOTE M# DP
AUG-03 11:14 AM 97635631 11151, 7 FAX TX OK 236
Y TOTAL : 1M 15S PAGES: 7
State of North Carolina
Department of Environment and Natural Resources
Wilmington Regional Office
Michael F. Easley, Governor
FAX COVER SHEET
Date 8f3�o 7
Tu
Co
Fax
Re ffLi�ir/A/!G E J�t/BOi ✓/ A^�
Vd iam C. Ross, Jr., Secretary
No Pages (excl cover)
From 1—
Phone �71Z,74`5—
Fax j910)350-2004
127 Cardinal Dnve Extension, Wilmington, NC 29405 • [phone] - An Equal Opponumty Affitmupve Action Employer

State of North Carolina
Department of Environment and Natural Resources
Wilmington Regional Office
Michael F. Easley Governor William G. Ross, Jr., Secretary
FAX COVER SHEET
Date g %
To le- f/iZi P �
Co /i'ez �/1 i4t1i. r
FaxRe
No Pages (excl cover) _
From
Phone / �� " 7 96' Z �S
Fax [phone]
127 Cardinal Drive Extension, Wilmington, NC 28405 • [phone] • An Equal Opportunity Affirmative Action Employer

Job No 06115
Date 8-1-2007
TRIPP ENGINEERING, P.C.
419 Chestnut Street, Wilmington, NC 28401
Phone [phone] • FAX [phone]
Email trippeng@ec rr com
LETTER OF TRANSMITTAL
To
Attention Cameron Weaver
Subject Alamance Subdivision
FAX TRANSMITTAL NUMBER OF PAGES INCLUDES COVER
I am sending you ( X ) ATTACHED ( ) UNDER SEPARATE COVER
( ) Prints ( ) Tracings ( ) Copy of letter ( ) Specifications ( ) Other
Cooies Item No Description
1 Corrected Page 3 Wet Detention Supplement
2 Corrected Calculations
1 Corrected Page 1 Wet Detention Supplement
These are transmitted as checked below
( ) For Approval ( ) For Your Use ( ) Sign & Return ( ) Review
Remarks Due to the calculation corrections, page 1 of the wet detention supplement
needed to be revised as well
5
�CEIN7F
AUGn 2 1nC7
BY.
Signed Charles D Cazier

,t 8fJJ2007 Alamance Subdivision 06115
CDC Stomnvater Pond Calculations
Total Drama
a Area
sq It
I acres
151153
1 347
Impervious Area
Land Use
sq It
acres
lots
45 000
1 03
Street Area
10 200
023
Sidewalk Area
0
0 00
Total
55 200
1 27
Stonnwater Calculations
Time of Concentration
Hydraulic Length (L) = 1 "0 ft
change in Height (H) = 12 ft
Tc = (L'/H)O 1128
1060 min
Flow for 2 year 6 hour Storm (02)
QPRE - (CPRE) x (I14) x (Area)
3 69 cl
QPOST = (CPOST) x Oro) x (Area)
7 52 cfs
CN = (98)(% imp) + (60)(l% imp)
= 74
P = 3 30 in fo2yr 6 hr stone
S = 1000/CN 10
351
Depth (D)= [P-(0 2)(S)f /[P+(0 8)(S)1
= 1 10 in
Time to Peak Flow
TP = )(43 5)(D)(Area)) / Q2rosT
22 1,(
6 min
Detention Pond Design
Pend Soe
Elevation
ft
Surface Area
ft
Normal Pool
3750
8 709
Flood Pool
3850
10 178
Top of Bank
4100
13 851
Bottom of Pool
3300
1 282
Provided Storage Volume
Vol = [(Normal pool SA + Flood Pool SA) 121
x IF P elev - N P elev )
9 444 cu ft
% impervious = 0 365
= 36 5%
say 37 0%
CPRE = 026
Cro T = (% imp)( 95)+(l% imp)(25)
= 051
12= 425 in/hr
Ira = 4 92 m/hr
Flow for 10 year 6 hour Stone (Qra)
QPRE - (CPRE) x (125) x (Area)
4 27 cfs
QPOST - (CPOST) x (I25) x (Area)
8 71 cfs
Sod Storage Capacity for 10 year Sloon
CN = (98)(% imp) + (60)(1% imp)
= 74
P = 4 82 in for 10 yr 6 hr storm
S = 1000/CN - 10
351
Depth (0)= [P (0 2)(S)12I (P+(0 8)(S))
- 222 in
Time to Peak Flow
TP = [(43 5)(D)(Area)1 / Qm PosT
3851 min
State Surface Area Requirement at normal pool
Pond side slopes = 3 1
Depth below N P= 4 5 It
SA/DA = 00292
(Chart for 90% TSS Removal for Wet Detention
Pond wthout Vegetative Filter
Required SA = (SAIDA) x (Total Drainage Area)
4 414 so it
State Volume Required for Storaqe of first 1" of runoff
Rv = 05+ 00%% imp)
= 0378674
V= (Design ramfall)(Rv)(Dramage Area)
- 4,770 cu ft
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/0y�y9%
0- SEAL 9r'
032555 -
GINO*S .�
S D CPti�\��
�ylll I111
Copy of 06115pond 1 of 2
S-Z-?try?

BrM007 Alamance Subdivision 06115
CDC Stomvater Pond Calculations
Pond Volume
ZBottom SA = 1 282 sq ft.NomaI Pool SA = 8 709 sq IL
Vol = ((N P SA + Bottom SA) 121 x IN P el - Bottom el )
22.480 cu R
Forebav
Required Volume
Vol = 20% of storage volume
- 4 4% cu I
Outlet Structure Design
Flow for 2-day drawdown
for 1st 1 of stormwater
0 = Required Vol / 172 800 sec (2-days)
0 028 cfs
Required Area of Pipe for 2 day drawdovm
A= Q/(CdxSQRT(2xgxh)]
Cd= 06
g = 32 2 ft /s2
h= IF P elev N P elev ) 2
0 5 fL
A = 00081 sq It
Diameter of Pipe for 2-day drawdown
DIA = SQRT[(A x 4) / p]
0 1016 It
1 22 in
'Use 1 in diameter pipe
Outlet Structure Check
Using a 6 x 6 Basin
Perimeter L = 24 ft
0 = CIA
C = (% imp)(95) + (1 % imp)(25)
051
1 = 4 92 in for a 25 yr Stonn
A = 3 47 Acres
871 CfS
Q= Cwx Lx H'
H = (Q / (Cw x L)]°
Cw = 3
024 It
Peak elevation = flood pool elevation + H
38 74 ft
Provided Volume
Bottom SA = 802 sq ft
Normal Pool SA = 2 346 sq ft
Vol = ((N P SA + Bottom SA) / 21 x (N P el Bottom el )
= 4 722 cu ft
Flow for 5-day drawdown
for 1 st 1 of stormwater
Q = Required Vol / 432 000 sec (5days)
0 011 CIS
Required Area of Pipe for 5-day drawdown
A= Q/(Cdx SQRT(2xgxh))
Cd= 06
9 = 322 ft /s2
h= IF P elev - N P elev.) 12
- 05R
A = 00032 so ft
Diameter of Pipe for 5-daydrawdown
DIA = SQRT[(A x 4) / pQ
0 0643 It
0 77 in
Copy of 06115pond 2 of 2

TRIPP ENGINEERING, P.C.
419 Chestnut Street
Wilmington, North Carolina 28401
Phone [phone] • FAX [phone]
e
June l 1, 2007
NCDENR
Division of Water Quality
127 Cardinal Drive
Wilmington, NC 28405-3845
Attn. Ms Rhonda Hall
Re Alamance Subdivision
New Hanover County, NC
TE 06115
Dear Rhonda
RECEIVED
JUN 1 4 2007
Enclosed please find two (2) sets of plans, one (1) signed original and one (1)
copy of the application form with narrative, one (1) wet detention basin supplement, two
(2) sets of calculations, and one check for the express review fee
Please review for approval and contact us with any questions or comments
Thank you
Sincerely,
Tripp Engineering, P.C. GV• %/--
Jonathan W Ham, E I
JWH dcb
Eric
A

Pierpomt Properties, LLC
301 Pierpomt Drive
Wilmington, NC 28405
_Pierpoint-Properties,_ LLC
June 12, 2007
Dear Sir or Madam
Buck O'Shields is working with Pierpomt Properties, LLC as a managing consultant
for the Alamance project on Murrayville Road
Sincerely,
Keith Register
Member and Organizer
............................

April 06, 2007
Stormwater Narrative
Alamance Subdivision
New Hanover County, NC
TE 06115
The total drainage area of this project is 3 47 acres The tract is proposed for a 9 lot
subdivision with asphalt street access of 10,200 sf, and an allowable built upon area of
5,000 sf/lot Total built upon area proposed is 55,200 sf or 36 6%
Stormwater runoff will be treated by proposed pond The basin is sized for the State's P
storm and 25-year pre -post outflow per New Hanover County requirements Outflow will
be routed to Smith Creek, classification C-SW