SW8950701_HISTORICAL FILE_19980922 (2)

STORMWATER DIVISION CODING SHEET
POST -CONSTRUCTION PERMITS
PERMIT NO.
SW8 g50-1 U 1
DOC TYPE
❑ CURRENT PERMIT
❑ APPROVED PLANS
KI HISTORICAL FILE
❑ COMPLIANCE EVALUATION INSPECTION
DOC DATE
1c1q 8 01 ►22
YYYYMMDD

State ofNorth Carolina
Department of Environment
and Natural Resources
Wilmington Regional Office
James B. Hunt, Jr., Governor
Wayne McDevitt, Secretary
Division of Water Quality
September 22, 1998
Mr. Ken Gebert, President
Colony Coast Contractors, Inc., General Partner in
Parkstone Limited Partnership
610 Gunston Lane
Wilmington, NC 28405
Subject:
Dear Mr. Gebert:
NCDENR
NORTR CAROLINA DEPARTMENT or
ENVIRONMENT AND NATURAL RESOURCES
Permit No. SW8950701 Modification
Parkstone at Landfall
High Density Subdivision Stormwater Project
New Hanover County
The Wilmington Regional Office received the modification to the Stormwater Management Permit Application for Parkstone
at Landfall on April 29, 1998, with final information on July 16, 1998. Staff review of the plans and specifications has
determined that the project, as proposed, will comply with the Stormwater Regulations set forth in Title 15A NCAC 2H.1000.
We are forwarding Permit No. SW8 950701 Modification, dated September 22, 1998, for the construction of the project,
Parkstone at Landfall.
This permit shall be effective from the date of issuance until September 22, 2008, and shall be subject to the conditions and
limitations as specified therein. Please pay special attention to the Operation and Maintenance requirements in this permit.
Failure to establish an adequate system for operation and maintenance of the stormwater management system will result in
future compliance problems.
Ifany parts, requirements, or limitations contained in this permit are unacceptable, you have the right to request an adjudicatory
hearing upon written request within thirty (30) days following receipt of this permit. This request must be in the form of a
written petition, conforming to Chapter 150B of the North Carolina General Statutes, and filed with the Office of Administrative
Hearings, P.O. Drawer 27447, Raleigh, NC 2761 1-7447. 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 (910)
395-3900.
Sincerely,
RSS/arl
cc:
Rick Shiver
Water Quality Regional Supervisor
S:\WQS\STORM WAT\PERMIT\950701.SEP
Mark Ashness, P.E.
Tony Roberts, New Hanover County Inspections
Beth Easley, New Hanover County Engineering
Linda Lewis
Wilmington Regional Office
Central Files
127 Cardinal Dr. Ext., Wilmington, North Carolina 28405 Telephone [phone] FAX [phone]
An Equal Opportunity Affirmative Action Employer 50% recycled/10°/ post -consumer paper

State Stormwater Management Systems
Permit No. SW8 95070I 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
Parkstone Limited Partnership
Parkstone at Landfall
New Hanover County
FOR THE
construction, operation and maintenance of 2 detention ponds 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 September 22, 2008 and shall be subject to the
following specified conditions and limitations:
I. DESIGN STANDARDS
This permit is effective only with respect to the nature and volume of stormwater described in the
application and other supporting data.
2. This stormwater system has been approved for the management of stormwater runoff as described on page
3 of this permit, the Project Data Sheet. The subdivision is permitted for 40 lots, each limited to a maximum
built -upon area as follows: the 13 existing Woodbridge Lots: Lots 4,36,38, & 39 @3,200 ft2; Lot 1 @3,400
ftz; Lots 5,7,35,37 & 40 @3,600 ft2; Lot 6 @3,900 ft2; Lots 2 & 3@4,180; the 27 Parkstone Lots: Lot 21
@3,600 ft2; Lot 24 @3,700 ftz; Lots 1-4,6,7,18,19 23, & 26 @3,800 ftz; Lots 8,17,20 & 22 @3,900 ft2; Lots
5,10,11,12,15,16,25, &27 @4,000 ftz; Lot 13 @4,100 ftz; Lot 9 @4,200 ftz; and Lot 14 @4,300 ftz.
3. Approved plans and specifications for this project are incorporated by reference and are enforceable parts
of the permit.
2

State Stormwater Management Systems
Permit No. SW8 950701 Modification
DIVISION OF WATER QUALITY
PROJECT DATA SHEET
Project Name: Parkstone at Landfall
Permit Number: 950701 Modification
Location: New Hanover County
Applicant: Mr. Ken Gebert, President
Colony Coast Contractors, Inc., General Partner
Mailing Address: Parkstone Limited Partnership
610 Gunston Lane
Wilmington, NC 28405
Application Date: April 29, 1998
Water Body Receiving Stormwater Runoff: Molts Channel
Classification of Water Body:
"SB 4"
POND1
POND2
Pond Depth, feet:
5.5
7.5
Permanent Pool Elevation, FMSL:
9
8.9
Total Impervious Surfaces, ftz:
104,282
134,122
Lots
*69,000
**82,960
Roads/Parking, ftz
32,690
40,396
Other, ftz
Parking, 2,592
Sidewalks & Parking, 10,766
Offsite Area entering Pond, ftz:
none, per Engineer
Required Surface Area, fie:
6,483
3,945
Provided Surface Area, fie:
8,413
4,490
Required Storage Volume, ft':
8,761
11,243
Provided Storage Volume, ft3:
9,337
14,940
Temporary Storage Elevation, FMSL:
10
11.3
Controlling Orifice:
1.5"$ pipe
1.5"$ pipe
*Parkstone Lots 1-7, 17-27
**Woodbridge Lots 1-7, 35-40 and
Parkstone Lots 8-16.
I

State Stormwater Mana.-ement Systems
Permit No. SW8950701 Modigutim
4. 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.
5. The permittee is responsible for verifying that the proposed built -upon area does not exceed the allowable
built -upon area. 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.
The following items will require a modification to the permit:
a. Any revision to the approved plans, regardless of size.
b. Project name change.
C. Transfer of ownership.
d. Redesign or addition to the approved amount of built -upon area.
e. Further subdivision of the project area.
f. Filling in, altering, or piping of any vegetative conveyance shown on the approved plan
In addition, the Director may determine that other revisions to the project should require a modification to
the permit.
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. Sheet C-4 received November 9, 1995 will continue to be the approved detail detail sheet for Pond 2.
II. SCHEDULE OF COMPLIANCE
1. The stormwater management system shall be constructed in it's entirety, vegetated and operational for its
intended use prior to the construction of any built -upon surface except roads.
2. During construction, erosion shall be kept to a minimum and any eroded areas of the system will be repaired
immediately.
3. The permittee grants permission to DENR Staff to enter the property for the purposes of inspecting the
project for compliance with the conditions of this permit.
4. 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.
5. Decorative spray fountains will not be allowed in the pond.

State Stormwater Management Systems
Permit No. SW8 950701 Modification
The permittee shall at all times provide the operation and maintenance necessary to assure the permitted
stonmwater system functions at optimum efficiency. The approved Operation and Maintenance Plan must
be followed in its entirety and maintenance must occur at the scheduled intervals including, but not limited
to:
a. Semiannual scheduled inspections (every 6 months).
b. Sediment removal.
C. Mowing and revegetation of side slopes.
d. Immediate repair of eroded areas.
e. Maintenance of side slopes in accordance with approved plans and specifications.
f. Debris removal and unclogging of outlet structure, orifice device and catch basins and piping.
g. Access to the outlet structure must be available at all times.
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.
Prior to the sale of any lot, deed restrictions must be recorded which limit the built -upon area per lot to the
amount as shown on the Project Data Sheet, per Section 1, Part 2. The recorded statements must follow the
form:
a. "The maximum built -upon area per lot is limited as follows: the existing Woodbridge Lots: Lots
4,36,38, & 39 @3,200 ft; Lot 1 @3,400 ft'; Lots 5,7,35,37 & 40 @3,600 ftZ; Lot 6 @3,900 ft'; Lots
2 & 3@4,180; 27 Parkstone Lots: Lot 21 @3,600 ftZ; Lot 24 @3,700 ft'; Lots 1-4,6,7,18,19,23, &
26 @3,800 ft'; Lots 8,17,20 & 22 @3,900 ft'; Lots 5,10,11,12,15,16,25, &27 @4,000 ft'; Lot 13
@4,100 ft'; Lot 9 @4,200 ft'; Lot 14 @4,300 ft', inclusive of that portion of the right-of-way
between the lot line and the edge of pavement, structures, pavement, walkways of brick, stone, or
slate, but not including open wood decking or the water surface of swimming pools."
b. "The covenants pertaining to stormwater regulations may not be changed or deleted without
concurrence of the State."
C. "Alteration of the drainage as shown on the approved plan may not take place without the
concurrence of the State."
d. "All runoff from each 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 naturally drain into the
system are not required to provide these measures."
9. This permit shall become voidable unless the facilities are constructed in accordance with the conditions of
this permit, the approved plans and specifications, and other supporting data.
10. A copy of the recorded deed restrictions must be submitted to the Division within 30 days of the date of
recording the plat. The recorded copy must be signed by the Permittee, dated, stamped with the deed book
number and page, and bear the stamp/signature of the Register of Deeds.

..
State Stormwater Management Systems
Permit No 5W8 950701 Modification
11. Prior to transfer of ownership, the pond must be inspected by DWQ personnel, and determined to be in
compliance with all permit conditions. Records of maintenance activities will be required.
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.
III. GENERAL CONDITIONS
This permit is not transferable. In the event there is a desire for the facilities to change ownership, or there
is a name change of the Permittee, a "Name/Ownership Change Form" must be submitted to the Division
of Water Quality accompanied by appropriate documentation from the parties involved, such as a copy of
the deed of trust. Other supporting materials, such as a signed Operation and Maintenance plan in the case
of engineered systems, will also be required. 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. 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.
The issuance of this permit does not preclude the Permittee from complying with any and all statutes, rules,
regulations, or ordinances which may be imposed by other government agencies (local, state, and federal)
which have jurisdiction.
4. In the event that the facilities fail to perform satisfactorily, including the creation of nuisance conditions,
the Permittee shall take immediate corrective action, including those as may be required by this Division,
such as the construction of additional or replacement stormwater management systems.
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.
Permittee grants permission to staff of the DWQ to access the property for the purposes of inspecting the
stormwater facilities during normal business hours.
Permit issued this the 22nd day of September, 1998.
NORTH CAROLINA ENVIRONMENTAL MANAGEMENT COMMISSION
DIti i n /. �
A. Preston Howard, Jr., P.E., Director
Division of Water Quality
By Authority of the Environmental Management Commission
Permit Number SW8 950701 Modification
G7

State Stormwater Management Systems
Permit No SW8950701 Modification
Parkstone at Landfall
Stormwater Permit No. SW8 950701 Modification
New Hanover County
Engineer's Certification
1, , as a duly registered Professional Engineer in the State of North
Carolina, having been authorized to observe (periodically/weekly/full time) the construction of the project,
ect)
for (Project Owner) hereby state that, to the best of my abilities, due care
and diligence was used in the observation of the project construction such that the construction was observed to be
built within substantial compliance and intent of the approved plans and specifications.
Noted deviations from approved plans and specifications:
Signature
Registration Number
Date
SEAL
7

STORU AI �
D E C E I V E
POND MAINTENANCE RE UIItEA�* JUL 16 1998 D
Project Namffa 6e: 4eai I,.J, Q Ts
Q a+ I I PAoj n� DlD�
Permittee: Qh I J i n-) i� Q=64 rikl p
Address:_ 2zo � n� I �ahPi PhoneNo._
I. Monthly, or after every runoff producing rainfall event, whichever comes fast:
A. Inspect the trash rack; remove accumulated debris, repair/replace if it is not functioning.
B. Inspect and clear the orifice of any obstructions. If a pump is used as the drawdown
mechanism, pump operation will be checked. A log of test runs of the pump will be kept
on site and made available to DWQ personnel upon request.
C. Inspect the pond side slopes and grassed inlet swales; remove trash, and repair eroded areas
before the next rainfall event.
D. If the pond is operated with a vegetated filter, the filter will be checked for sediment
accumulation, trash accumulation, erosion and proper operation of the flow spreader
mechanism. Repairs/cleaning will be done as necessary.
H. Quartetly (Four times a year):
A. Inspect the collection system (ie. catch basins, piping, grassed swales) for proper
functioning. Accumulated trash will be cleared from basin grates, basin bottoms, and piping
will be checked for obstructions and cleared as required.
B. Pond inlet pipes will be checked for undercutting. Riprap or other energy dissipation
structures will be replaced, and broken pipes will be repaired.
III. Semi-annually (twice a year):
r:, 1.
A. Accumulated sediment from the bottom of the outlet structure will be removed.
B. The forebay depth will be checked at various points. Sediment removal is required when the
depth is reduced to 75 % of the original forebay design depth of K
C. Grassed swales, including the vegetated filter if applicable, will be reseeded twice a year as
necessary.
nnPori = , �
A

POND MAINTENANCE REQUIREMENTS
PAGE 2
IV. Annually (Once a year):
A. The pond depth will be checked at various points. Sediment removal is required when the
depth is reduced to 75 % of the original design depth or 3', whichever is greater. Design
depth is ', measured vertically from the orifice down to the pond's bottom.
Sediment must be removed to at least the original design depth.
V. General:
A. Mowing of the side slopes will be accomplished according to the season. Maximum grass
height will be 6".
B. Cattails are encouraged along the pond perimeter, however they will be removed when they
cover more than 1/2 the surface area of the pond. The best time to cut them is at the end of
the growing season, in November. Environmentally sensitive chemicals for use in killing
cattails can also be used. Contact your nearest Agricultural Extension Agent.
C. The orifice/pump is designed to draw down the pond in 2-5 days. If drawdown is not
accomplished in that time, the orifice will be replaced with a larger or smaller orifice. Slow
drawdown may be attributed to a clogged system. The source of the clogging will be found
and eliminated.
D. All components of the detention pond system will be kept in good working order. Repair
or replacement components will meet the original design specifications as per the approved
stormwater plan. If previously approved components are determined to be ineffective, the
component must be redesigned and/or replaced.
VI. Special Requirements:
I, — �g*)fon 9• &40121e� rt , hereby ack-nowledge that I am the financially
(please print or type natne clearly)
responsible party for maintenance of this detention pond. I will be responsible for the performance of the
maintenance -as outlined above,/as part of the Stormwater Management Permit received for this project.
Signature: Datei
Revised 2125/97 .
Lf�t�

,.. C. Y
' ale eceiveFee
Paid,ennit
Number
State of North Carolina
Department of Environment and Natural Resources
Division of Water Quality
STORMWATER MANAGEMENT PERMIT APPLICATION FORM
This form may be photocopied for use as an original
I. GENERAL INFORMATION
1. Applicants name (spgcify the name of tjre
-env
2. Print Owner/Signing Official's name and title (the person
its compliance):, I t
3. Mailing Address for person listed in item 2 above:
CityI �I I I m 1 nq 1Z�) n
Telephone Number. ( I IQ j 12—E&_
who ownstthe project):
is legally retsponsible for the facility and
r�I
4. Project Name (subdivision, facility, or establishment name - should be consistent with project name on
plans, specifications, letters, pperation and maintenance agreements, etch: , i
5. Location of Facility (street address)
Ov. r, County
6. Directions to facility (fro nearest m�jpr intersection : I
U��" I c7 �Jol 1�S b r.
of l V r o
e►" n� 1 G�
7. Latitude: Longitude of facility
B. Contact Ferrson who can answer questions about the facility:
Nano LZOn < Telephone Number: ( I I D ) 'L ✓Cl/—
II. PERMIT INFORMATION:
1. Specify whether project is (check one): New Renewal Modification
2. If this application is being suamitted as the re ult of a renewal or modification to an exist' g�err 't list
the existing pennitnumber_5 W �7 qr2 O10 1 and its issue date (if known)
Form SWU-101 January 1998 Page 1 of 4

i4
3. Specify the type of project (check one):
_Low Density ,High Density _Redevelop
_General Permit _Other
4. Additional Project Requir�etr/tents (check applicable blanks):
_CAMA Major / 1 Sedimentation/Erosion Control
III. PROJECT INFORMATION
_404 Permit
1. In the space provided below, summarize how stormwater will be treated. Also attach a detailed narrative
(ong to two pages) describipg stormwater management for the project.
e sL1�Ies
2. Stormwater runoff from this project drains to the �., hee River basin.
�/^
3. Total Project Area: acres 4. Project Built Upon Area: `4o.
5. How many drainage basins does the project have?
2 6P4&ffW- i�MiT 41-r,
6. Complete the following information for each drainage basin. If there are more than two drainage basins in
the project, attach an additional sheet with the information for each basin rovided in the same format as
below. f jai' I� e • �
'Basin 'Informatlon%3 ``,
r
Receivin Stream Name
Receiving Stream Class
Drainage Basin Area
h,116
Existing Impervious* Area
Proposed Im ervious"Area
Q
p
% Impervious Area (total)
O
o
Im ervlous:Sucfa`ceArea". "''
, ,:- Drama' . ,Brim l re ,',,r ea
�s sprains eiBastnF2 ,1 ��„x'
On -site Build ins
C7
On -site Streets
On -site Parkin
p
On -site Sidewalks
Other on -site
Off -site
Totald
k
E_
iwu5 area
is defined
ed areas, etc.tt upon area including, but not limited too,,, buildings, roads, parking
areas,
7. How was the off -site impervious area listed above derived? k 65E
IV. DEED RESTRICTIONS AND PROTECTIVE COVENANTS
Deed restrictions and protective covenants are required to be recorded for all low density projects and all
subdivisions prior to the sale of any lot. Please see Attachment A for the specific items that must be recorded.
Form SWU-101 January 1998 Page 2 of 4

By your signature below, you certify that the recorded deed restrictions and protective covenants for this project
shall include all the items required by the permit, that the covenants will be binding on all parties and persons
claiming under them, that they will run with the land, that the required covenants cannot be changed or
deleted without concurrence from the State, and that they will be recorded prior to the sale of any lot.
If you wish to designate submittal authority to another individual or firm so that they may provide
information on your behalf, please complete this section:
Designated agent (individual or fum): GCS F—,e h %f n nc
VII. SUBMITTAL REQUIREMENTS
This application package will not be accepted by the Division of Water Quality unless all of the applicable
items are included with the submittal.
1. Please indicate that you have provided the following required information by signing your initials in the
space provided next to each item.
• Original and one copy of the Stormwater Management Permit Application Form
• One copy of the applicable Supplement Form(s) for each BMP (see Attachment A)
• Permit application processing fee (see Attachment A)
• Two copies of plans and specifications including:
• 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 & 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, parking, cul-de-sacs, sidewalks, and curb and gutter
- Wetlands delineated, or a note on plans that none exist
- Existing drainage (including off -site), drainage easements, pipe sizes, runoff calculations
- Drainage basins delineated
- Vegetated buffers (where required)
V. APPLICANT'S CERTIFICATION
1; (print or type name of person listed in General Information, itent 2) Von V e k r4
certify that the information, included on this permit application form is correct, that the project will be
constructed in conformance with the approved plans, that the deed restrictions in accordance with Attachment
A of this form will be recorded with all required permit conditions, and that to the best of my knowledge the
proposed project co lies with the requirements of 15A NCAC 21-1.1000.
Signature /J/` � 9�,ZioGt� . Date -.—
Form SWU-101 January 1998 Page 3 of 4

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

CAPE FEAR
Engineering, Inc.
3963 Market Street
Wilmington, N.C. 2a403
voice [phone]
Fax [phone]
E-mail [e-mail]
To: N.C.D.E.N.R.
Division of Water Quality
127 Cardinal Drive Ext.
Wilmington, N.C. 28405-3845
ATTENTION. Linda Lewis
RECEIVED
JUL 161998
BY:
Transmittal
DATE: 7/13/98
PROJECT No 208-01 _98
RE: Parkstone Subdivision @ Landfall
Modification of Permit # SW8 950701
Quantity Drawing No. Description
t Maintenance Agreement for both ponds
2 Sets Revised Stormwater Master Plan
REMARKS Resubmittal addressing your comments. If you have any questions
or require additional information please contact our office.
CC: Ken Gebert, Owner CAPE F -n ineering, Inc.
File
Signed

State of North Carolina
Department of Environment
and Natural Resources
Wilmington Regional Office
James B. Hunt, Jr., Governor
Wayne McDevitt, Secretary
Division of Water Quality
June 23, 1998
Mr. Mark Ashness, P.E.
Cape Fear Engineering
3963 Market Street
Wilmington, NC 28403
INCDENR
NORTH CAROLINA DEPARTMENT OF
ENVIRONMENT AND NATURAL RESOURCES
Subject: ACKNOWLEDGEMENT OF RECEIPT AND
REQUEST FOR ADDITIONAL INFORMATION
Stormwater Project No. SW8 950701
Parkstone @Landfall
New Hanover County
Dear Mr. Ashness:
The Wilmington Regional Office received a Stormwater Management Permit Application for
Parkstone @Landfall on April 29, 1998. A preliminary review of that information has determined that the
application is not complete. The following information is needed to continue the stormwater review:
1. Please provide existing and proposed contours, spot elevations, finished floor elevations,
inverts and top elevations for the homes, roads, drives, piping, and catch basins. The
previously approved plans under Woodbridge will be superceeded by this permit modification,
so the approved plans must be complete in all items.
2. Please provide dimensions for the roads, property lines, and permanent pool of both ponds.
3. Since this is a modification and both ponds are included in the application, please provide the
pond section and outlet details for Pond 2.
4. Delineate all wetlands on site, or note on the plans that none exist.
5. Locate the pond in a recorded access/drainage easement.
6. Please refer to the enclosed Operation and Maintenance plan. Several of the items are missing
from the one submitted, including the monthly inspection requirement, forebay sediment
removal, reseeding, cattail removal, accomplishment of drawdown within 2-5 days, and the
repair/replacement of all components of the detention pond and collection system to the
permitted design condition. Please either add these requirements to the submitted document,
or have the enclosed document signed by the owner. It is not necessary to sign separate
documents for each pond. One O & M with both ponds' depths listed will suffice.
Additionally, a notary signature is no longer required.
127 Cardinal Dr. Ext., Wilmington, North Carolina 28405 Telephone [phone] FAX [phone]
An Equal Opportunity Affirmative Action Employer 50% recycled/10% post -consumer paper

Mr. Ashness
June 23, 1998
Stormwater Project No. SW8 950701
7. Please add the direction and distance to at least one more named road, such as Military Cutoff
on the location map.
Please note that this request for additional information is in response to a preliminary review. The
requested information should be received by this Office prior to July 18, 1998, or the application will be
returned as incomplete. The return of a project will necessitate resubmittal of all required items, including
the application fee.
If you have any questions concerning this matter please feel free to call me at [phone].
RSS/arl:
cc:
Sincerely,
/'4� � 4.�
Ms. Linda Lewis
Environmental Engineer
S:\WQS\STORMWAT\ADDINFO\950701.JUN
Linda Lewis
Central Files
127 Cardinal Dr. Ext., Wilmington, North Carolina 28405 Telephone [phone] FAX [phone]
An Equal Opportunity Affirmative Action Employer - 50% recycled/10 % post -consumer paper

CAPE FEAR
4 Engineering, 1
3963 Market Street
Wilmington, N.C. 28403
Votes [phone]
Fox [phone]
E-mil [e-mail]
TO: N.C.D.E.N.R.
Division of Water Quality
127 Cardinal Drive Ext.
Wilmington, N.C. 28405-3845
ATTENTION: Linda Lewis
Transmittal
DATE: 4/28/98
PROJECT NO: 208-01 _98
RE: Parkstone Subdivision @ Landfall
Modification of Permit # SW8 950701
Quantity
Drawing No.
Description
1
Set
Original Approved Plan with Approval Letter
2
Sets
Revised Stormwater Master Plan
2
Sets
Detailed Stormwater Plan noting modifications
2
Sets
Stormwater Permit Application with Wet Detention Basin Supplement
1
Check
Plan Review Fee — Check for $385.00
2
Sets
Stormwater Narrative with Calculations
1
Set
House Plan Footprint
1
Set
Maintenance Agreement for each Pond
REMARKS Attached is information for stormwater permit approval. If you have any questions
or require additional information please contact our office.
CC: Ken Gebert, Owner rAPE F, g' ring, Inc.
File fTJ
Signed
Mark P. Ashness, PE

Impervious Area Comparision
Parkstone @ Landfall
4/28/98
Detention Pond #1 - Impervious Surface Breakdown Pond Revised from prior Permit
New New New Home New Lot
New Lot # Old Lot # Home Driveway Sidewalk Total
1
26
3,052
sf
510 sf
200 sf
3,800
sf
2
27
3,052
sf
510 sf
200 sf
3,800
sf
3
28
3,052
sf
510 sf
200 sf
3,800
sf
4
29
3,052
sf
510 sf
200 sf
3,800
sf
5
30
3,052
sf
653 sf
200 sf
4,000
sf
6
31
3,052
sf
531 sf
200 sf
3,800
sf
7
32
3,052
sf
451 sf
200 sf
3,800
sf
17
15
3,052
sf
553 sf
200 sf
3,900
sf
18
16
3,052
sf
476 sf
200 sf
3,800
sf
19
17
3,052
sf
476 sf
200 sf
3,800
sf
20
18
3,052
sf
579 sf
200 sf
3,900
sf
21
19
3,052
sf
259 sf
200 sf
3,600
sf
22
20
3,052
sf
560 sf
200 sf
3,900
sf
23
21
3,052
sf
518 sf
200 sf
3,800
sf
24
22
3,052
sf
388 sf
200 sf
3,700
sf
25
23
3,052
sf
685 sf
200 sf
4,000
sf
26
24
3,052
sf
484 sf
200 sf
3,800
sf
27
25
3,052
sf
691 sf
200 sf
4,000
sf
Revised Plan Impervious Breakdown
Lots
69,000
sf
4,059 avg. per lot
Roadways
25,207
sf
Sidewalks
7,483
sf
Pond has been revised to accommodate
Parking Areas
2,592
sf
the increase in impervious area
104,282
sf
103,050 sf Previously Permitted

4
Detention Pond #2 - Impervious Surface Breakdown No physical change to Pond #2
New
New
New Home
New Lot
New Lot #
Old Lot #
Home
Driveway
Sidewalk
Total
(Parkstone)
(Woodbridge)
Impervious
Impervious
Impervious
Impervious
1
-
sf
0 sf
0 sf
-
sf
2
-
sf
0 sf
0 sf
-
sf
3
-
sf
0 sf
0 sf
-
sf
4
-
sf
0 sf
0 sf
-
sf
5
-
sf
0 sf
0 sf
-
sf
6
-
sf
0 sf
0 sf
-
sf
7
-
sf
0 sf
0 sf
-
sf
10
8
3,052
sf
535 sf
400 sf
4,000
sf
11
9
3,052
sf
488 sf
400 sf
4,000
sf
12
10
3,052
sf
505 sf
400 sf
4,000
sf
13
11
3,052
sf
608 sf
400 sf
4,100
sf
14
12
3,052
sf
751 sf
400 sf
4,300
sf
15
13
3,052
sf
519 sf
400 sf
4,000
sf
16
14
3,052
sf
472 sf
400 sf
4,000
sf
8
33
3,052
sf
371 sf
400 sf
3,900
sf
9
34
3,052
sf
662 sf
400 sf
4,200
sf
35
-
sf
- sf
- sf
-
sf
36
-
sf
- sf
- sf
-
sf
37
-
sf
- sf
- sf
-
sf
38
-
sf
- sf
- sf
-
sf
39
-
sf
- sf
- sf
-
sf
40
-
sf
- sf
- sf
-
sf
Totals
27,468
sf
4,911 sf
3600 sf
36,500
sf
Revised Plan Impervious Breakdown
Lots 36,500 sf 1,587 avg.perlot
Roadways 40,396 sf
Sidewalks 7,334 sf
Parking Areas 3,432 sf
87,662 sf 137,930 sf Permitted Previously

N
—ts�
t -F
No.5505
Engineers Computation Pad
�� 6

124>
Engine 5
Engineers Computation Pad

STORMWATER CALCULATIONS - Parkstone Pond #1
Stage - Storage Entire Pond
Contour
Contour
Incr.
Accum.
Elev.
Area
Storage
Storage (S)
(11)
(so
(co
(cf)
3.5
325
0
211
4.0
519
211
772
5.0
1,025
983
1,417
6.0
1,808
2,400
2,457
7.0
3,105
4,856
3,922
8.0
4,739
8,778
9.0
8,413
6,576
= l�
15,354 �I ��
10.0
10,260
9,337
C,
24,691 - -(Or ar-
5,994
10.5
13,717
30,685
Stage - Storage Foreba
Contour
Contour
Incr.
Accmn.
Elev.
Area
Storage
Storage (S)
(n)
(sfl
(c9
(c>)
6.0
133
0
374
7.0
615
374
983
8.0
1,350
1,357
9.0
2,148
1,749
r
3,106

CM
v!
1 - Manual - 10 Yr - Qp = 18.62 cfs
20
15
Q cfs 10
Out
5
0.0 0.5 1.0 1.5 2.0 2.5
Time (hrs)

Inflow Hvdrograph - Q10
Peak Inflow, (Qp) =>
Tunc to Peak Calculation: CN=
Q"=
Time to Peak, (Tp) =>
(SCS TR-55)
18.6 cfs
80 P= 4.8
2.72 (inches of nmofi)
32.88 minutes
1/tp
QDR
t
Q
0.00
0.000
0
0.00
0.06
0.009
2
0.17
0.12
0.036
4
0.67
0.18
0.080
6
1.49
0.24
0.139
8
2.59
0.30
0.211
10
3.94
0.37
0.294
12
5.49
0.43
0.385
14
7.17
0.49
0.479
16
8.93
0.55
0.574
18
10.71
0.61
0.667
20
12.44
0.67
0.753
22
14.05
0.73
0.831
24
15.49
0.79
0.896
26
16.71
0.85
0.947
28
17.65
0.91
0.981
30
18.30
0.97
0.998
32
18.62
1.03
0.997
34
18.59
1.10
0.978
36
18.24
1.16
0.941
38
17.55
1.22
0.889
40
16.57
1.28
0.825
42
15.38
1.34
0.762
44
14.21
1.40
0.704
46
13.13
1.46
0.650
48
12.13
1.52
0.601
50
11.21
1.58
0.555
52
10.35
1.64
0.513
54
9.57
1.70
0.474
56
8.84
1.76
0.438
58
8.17
1.83
0.405
60
7.55
1.89
0.374
62
6.97
1.95
0.345
64
6.44
2.01
0.319
66
5.95
2.07
0.295
68
5.50
2.13
0.272
70
5.08
2.19
0.252
72
4.69
2.25
0.233
74
4.34
2.31
0.215
76
4.01
2.37
0.199
78
3.70
2.43
0.183
80
3.42
2.49
0.170
82
3.16
S= 2.50

MA
2.56
0.157
84
2.92
2.62
0.145
86
2.70
2.68
0.134
88
2.49
2.74
0.124
90
2.30
2.80
0.114
92
2.13
2.86
0.105
94
1.97
2.92
0.097
96
1.82
2.98
0.090
98
1.68
3.04
0.083
100
1_55
3.10
0.077
102
1.43
3.16
0.071
104
1.32
3.22
0.066
106
1.22
3.29
0.061
108
1.13
3.35
0.056
110
1.04
3.41
0.052
112
0.97
3.47
0.048
114
0.89
3.53
0.044
116
0.82
3.59
0.041
118
0.76
3.65
0.038
120
0.70
3.71
0.035
122
0.65
3.77
0.032
124
0.60
3.83
0.030
126
0.55
3.89
0.027
128
0.51
3.95
0.025
130
0.47
4.02
0.023
132
0.44
4.08
0.022
134
0.40
4.14
0.020
136
0.37
4.20
0.019
138
0.35
4.26
0.017
140
0.32
4.32
0.016
142
0.29
4.38
0.015
144
0.27
4.44
0.013
146
0.25
4.50
0.012
148
0.23
4.56
0.012
150
0.21
4.62
0.011
152
0.20
4.68
0.010
154
0.18
4.75
0.009
156
0.17
4.81
0.008
158
0.16
4.87
0.008
160
0.14
4.93
0.007
162
0.13
4.99
0.007
164
0.12
5.05
0.006
166
0.11

Stage / Discharge
3.0
2.5
2.0
tage (ftf 5
1.0
0.5
0.00 20 40 60 80 100
Discharge (cfs)

a
Stage / Storage
3.0
2.5
2.0
tage (ftf 5
1.0
0.5
0-8.0 0.2 0.4 0.6 0.8 1.0
Storage (acft)

2 - Reservoir - 10 Yr - Max. E1. = 10.5 f
11.0
10.6
10.2
lev (ft)
9.8
9.4
9.01
.0 0.5 1.0 1.5 2.0 2.5
Time (hrs)

In
2 - Reservoir - 10 Yr - Qp = 18.12 cfs
20
15
/ 4 cfs 10 In
5
/ Out
0.0 0.5 1.0 1.5 2.0 2.5
Time (hrs)

Page 1
Hydrograph Summary Report
Hyd.
No.
Hydrograph
type
(origin)
Peak
flow
(cfs)
Time
Interval
(min)
Time to
peak
(min)
volume
(acft)
Return
period
(yrs)
Inflow
hyd(s)
Maximum
elevation
(ft)
Maximum
storage
(acft)
Hydrograph
description
1
Manual
18.6
2
32
1.17
10
—
10 YR Hydo
2
Reservoir
18.1
2
36
1.14
10
1
10.50
0.35
tOYR
Proj. file: 0428.GPW
IDF file: WILKIDF
Run date: 04-28-1998

Hydrograph Report Page
Hyd. No. 2
10 YR
Hydrograph type
= Reservoir
Storm frequency
= 10 yrs
Inflow hyd. No.
= 1
Max. Elevation
= 10.50 ft
Peak discharge
= 18.12 cfs
Time interval
= 2 min
Reservoir name
= Pond #1
Max. Storage
= 0.35 acft
Storage indication method used.
Total Volume = 49,667 ouft, 1.14 aoft
Hydrograph Discharge Table
Time
Inflow
Elevation
Culy. A Culy. B
Culy. C Weir A
Weir B Weir C
Outflow
(hrs)
(cfs)
(ft)
(cfs) (cfs)
(Cfs) (cfs)
(cfs) (cfs)
(cfs)
0.23
7.07
9.23
0.02 -----
----- -----
----- -----
0.02
0.27
8.93
9.34
0.03 -----
----- -----
----- -
0.03
0.30
10.71
9.47
0.06 -----
----- -----
----- -
0.06
0.33
12.44
9.62
0.09 -----
- --
-
0.09
0.37
14.05
9.79
0.13 -----
----- -----
----- -----
0.13
0.40
15.49
9.98
0.17 -----
----- ----
----- -----
0.17
0.43
16.71
10.14
0.20
-- 1.52
----- -----
1.72
0.47
17.65
10.27
0.22 -----
----- 4.32
----- -----
4.54
0.50
18.30
10.39
0.23 -----
----- 7.35
----- -----
7.58
0.53
18.62 <<
10.47
3.30 -----
----- 9.72
----- - -
13.02
0.57
18.59
10.50
7.37 -----
--- 10.65
----- -
18.03
0.60
18.24
10.50 <<
7.39 -----
----- 10.74
----- -----
18.12 <<
0.63
17.55
10.50
7.38 -----
----- 10.69
----- -----
18.07
0.67
16.57
10.50
6.88 -----
----- 10.50
----- -----
17.39
0.70
15.38
10.49
5.82
----- 10.27
----- -----
16.09
0.73
14.21
10.48
4.84 -----
---- 10.06
----- -----
14.90
0.77
13.13
10.48
3.91 -----
-- 9.86
----- ---
13.77
0.80
12.13
10.47
3.05 -----
- 9.67
----- -
12.72
0.83
11.21
10.46
2.26 -
-- 9.50
- -
11.75
0.87
10.35
10.46
1.52 -----
-- 9.34
--- --
10.86
0.90
9.57
10.45
0.84 ----
-- 9.19
----- -
10.03
0.93
8.84
10.45
0.24 -----
- 9.05
-- -
9.29
0.97
8.17
10.44
0.24 ----
- 8.85
----- -----
9.09
1.00
7.55
10.43
0.24 -
- 8.54
-- -
8.78
1.03
6.97
10.42
0.24 --
- 8.16
-- -
8.40
1.07
6.44
10.40
0.23 -----
- - 7.73
----- -
7.97
1.10
5.95
10.39
0.23 -----
---- 7.30
----- -----
7.54
1.13
5.50
10.37
0.23 -----
- 6.87
----- -
7.10
1.17
5.08
10.36
0.23 -----
-- 6.44
----- -----
6.67

85% TSS REMOVAL
30 TOOT VEGETATED FILTER RE, QUntED
DEPTH
3'
3.5'
4.0'
4.5'
5.0'
5.5'
6.0'
6.5'
7.0'
7.5'
IMP %
10 %
.9
.8
.7
.6
.5
0
0
0
0
0
20 %
1.7
1.3
1.2
1.1
1.0
.9
.8
.7
.6
.5
30 %
2.5
2.2
1.9
1.8
1.6
1.5
1.3
1.2
1.0
.9
40 %
3.4
3.0
2.6
2.4
2.1
1.9
1.6
1.4
1.1
1.0
50 %
4.2
3.7
3.3
3.0
2.7
2.4
2.1
1.8
1.5
1.3
60 %
5.0
.4.5
3.8
3.5
3.2
2.9
2.6
2.3
2.0
1.6
70 %
6.0
5.2
4.5
4.1
3.7
3.1
2.9
2.5
2.1
1.8
80 %
6.8 ;i
6.0
5.2
4.7
4.2
3.7
3.2
2.7
2.2
2.0
90 %
7.5
6.5
5.8
5.3
4.8
4.3
3.8
3.3
2.8
1.3
100 %
8.2
7.4
6.8
6.2
5.6
5.0
4.4
3.8
3.2
2.6
90% TSS REMOVAL
NO VEGETATED FILTER RE,QUIIMED
3.5'
4.0'
4.5'
5.0'
5.5'
6.0'
6.5'
7.0'
7.5'
I3'
1.3
1.0
.8
.7
.6
.53
22.4
2.0
1.8
1.7
1.5
1.4
1.2
1.0
.9
.6
30 %
3.5
3.0
2.7
2.5
2.2
1.9
1.6
1.3
1.1
.8
40 %
4.5
4.0
3.5
3.1
2.8
2.5
2.1
1.8
1.4
1.1
50 %
5.6
5.0
4.3
3.9
3.5
.1
2.7
2.3
1.9
1.5
60 %
7.0
6.0
5.3
4.8
4.3
3.9
3.4
2.9
2.4
1.9
70 %
8.1
7.0
6.0
5.5
5.0
4.5
3.9
3.4
2.9
2.3
80 %
9.4
8.0
7.0
6.4
5.7
5.2
4.6
4.0
3.4
2.8
90 %
(10.7)
9.0
7.9
7.2
6.5
5.9
5.2
4.6
3.9
3.3
LIM8100 %
12.0
10.0
8.8
.1
7.3
6.6
5.8
5.1
4.3
3.6
Note: The required surface area calculated from the tables is to be provided at the permanent pool elevation.

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( IN FEET )
1 inch = 10 ft