SW8010912_Historical File_20020408

Michael F. Easley, Governor
William G. Ross, Jr., Secretary
North Carolina Department of Environment and Natural Resources
Gregory J. Thorpe, Ph.D., Acting Director
Division of Water Quality
Wilmington Regional Office
April 8, 2002
Mr. William A. Ambrose, Executive Vice President
Worsley Companies, Inc.
PO Box 3227
Wilmington, NC 28406
Subject: Permit No. SW8 010912
Rocky Point Scotchman #150
High Density Stormwater Project
Dear Mr. Ambrose: Pender County
The Wilmington Regional Office received a complete Stormwater Management Permit Application for Rocky Point
Scotchman #150 on March 22, 2002. 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 010912 dated April 8, 2002, for the construction of Rocky Point Scotchman #150.
This permit shall be effective from the date of issuance until April 8, 2012, and shall be subject to the conditions
and limitations as specified therein. Please pay special attention to the Operation and Maintenance requirements
in this permit. Failure to establish an adequate system for operation and maintenance.of the stormwater management
system will result in future compliance problems.
If any parts, requirements, or limitations contained in this permit are unacceptable, you have the right to request an
adjudicatory hearing upon written request within thirty (30) days following receipt of this permit. This request must
be in the form of a written petition, conforming to Chapter 150B of the North Carolina General Statutes, and filed
with the Office of Administrative Hearings, P.O. Drawer 27447, Raleigh, NC 27611-7447. Unless such demands
are made this permit shall be final and binding.
If you have any questions, or need additional information concerning this matter, please contact Linda Lewis, or
me at [phone].
Sincerely,
Rick Shiver
Water Quality Regional Supervisor
RSS/arl: S:1WQSISTORMWATIPERNffAol0912.APR
cc: Jeff Roney, P.E. , .
Pender County Building Inspections
Linda Lewis
Wilmington Regional Office
Central Files
N.C. Division of Water Quality in
127 Cardinal Drive Extension Wilmington, N.C. 28405 [phone] Fax [phone] Customer Service
800-623-7748

i •
State Stormwater Management Systems
Permit No. SW8 010912
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
Worsley Companies, Inc.
Rocky Point Scotchman #I50
Pender 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 April 8, 2012 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 on page
3 of this permit, the Project Data Sheet. The stormwater control has been designed to handle the runoff from
269,114 square feet of impervious area.
3. Approved plans and specifications for this project are incorporated by reference and are enforceable parts
of the permit.
4. The tract will be limited to the amount of built -upon area indicated on page 3 of this permit, and per
approved plans. The built -upon area for the future development is limited to n/a.
5. 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.
6. The runoff from all built -upon area within the permitted drainage area of this project must be directed into
the permitted stormwater control system. A permit modification must be submitted and approved prior to
the construction of additional built -upon area from outside of the approved drainage area.
2

State Stormwater Management Systems
Permit No. SW8 010912
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 ofNorth Carolina as amended, and
other applicable Laws, Rules, and Regulations
PERMISSION IS HEREBY GRANTED TO
Worsley Companies, Inc.
Rocky Point Scotchman #150
Pender 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 April 8, 2012 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 on page
3 of this permit, the Project. Data Sheet. The stormwater control has been designed to handle the runoff from
269,114 square feet of impel- rious area.
3. Approved plans and specifications for this project are incorporated by reference and are enforceable parts
of the permit.
4. The tract will be limited to the amount of built -upon area indicated on page 3 of this permit, and per
approved plans. The, built -upon area for the future development is limited to n/a.
5. 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.
6. The runoff from all built -upon area within the permitted drainage area of this project must be directed into
the permitted stormwater control system. A permit modification must be submitted and approved prior to
the construction of additional built -upon area from outside of the approved drainage area.
2

State Stormwater Management Systems
Permit No. SW8 010912
DIVISION OF WATER QUALITY
PROJECT DESIGN DATA SHEET
Project Name:
Rocky Point Scotchman #150
Permit Number:
SW8 010912
Location:
Pender County
Applicant:
Mr. William A. Ambrose, Executive Vice President
Mailing Address:
Worsley Companies, Inc.
PO Box 3227
Wilmington, NC 28406
Application Date:
March 22, 2002
Name of Receiving Stream/Index #:
Cape Fear / Northeast Cape Fear River / 18-74-(47.5)
Classification of Water Body:
"B Sw'°
Pond Depth, feet:
6.5
Permanent Pool_ Elevation, FMSL:
23.5
Drainage Area, acres:
10.22
Total Impervious Surfaces, ft2:
269,114
Offsite Area entering Pond, ft2:
None, per engineer
Required Surface Area, ft2:
13,011
Provided Surface Area, ft2:
21,497
Required Storage Volume, W:
22,038
Provided Storage Volume, W:
22,210
Temporary Storage Elevation, FMSL: 24.49
Controlling Orifice:
211cp pipe
3

State Stormwater Management Systems
Permit No. SW8 010912
II. SCHEDULE OF COMPLIANCE
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.
2. During construction, erosion shall be kept to a minimum and any eroded areas of the system will be repaired
immediately.
3. The permittee shall at all times provide the operation and maintenance necessary to assure the permitted
stormwater system functions at optimum efficiency. The approved Operation and Maintenance Plan must
be followed in its entirety and maintenance must occur at the scheduled intervals including, but not limited
to:
a. Semiannual scheduled inspections (every 6 months).
b. Sediment removal.
C. Mowing and revegetation of side slopes and vegetated filter.
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, 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 taker_.
5. Decorative spray fountains will not be allowed in the stormwater treatment system.
6. The facilities shall be constructed as shown on the approved plans. This permit shall become voidable unless
the facilities are constructed in accordance with the conditions of this permit, the approved plans and
specifications, and other supporting data.
7. Upon completion of construction, prior to issuance of a Certificate of Occupancy, and prior to operation of
this permitted facility, a certification must be received from an appropriate designer for the system installed
certifying that the permitted facility has been installed in accordance with this permit, the approved plans
and specifications, and other supporting documentation. Any deviations from the approved plans and
specifications must be noted on the Certification. A modification may be required for those deviations.
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. 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, or sale of the project area. The project area is defined as all property
owned by the permittee, for which Sedimentation and Erosion Control Plan approval was sought.
f. Filling in, altering, or piping of any vegetative conveyance shown on the approved plan.
10. The permittee shall submit final site layout and grading plans for any permitted future areas shown on the
approved plans, prior to construction. Ifthe proposed BUA exceeds the amount permitted under this permit,
a modification to the permit must be submitted and approved prior to construction.
4

State Stormwater Management Systems
Permit No. SW8 010912
11. 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.
12. The permittee shall notify the Division of any name, ownership or mailing address changes within 30 days.
13. Prior to the sale or lease of any portion of the property, the permittee shall notify DWQ and provide the
name, mailing address and phone number of the purchaser or leasee. An access/maintenance easement to
the stormwater facilities shall be granted in favor of the permittee if access to the stormwater facilities will
be restricted by the sale or lease of any portion of the property.
14. The permittee is responsible for verifying that the proposed built -upon area does not exceed the allowable
built -upon area.
15. The Director may notify the permittee when the permitted site does not meet one or more of the minimum
requirements of the permit. Within the time frame specified in the notice, the permittee shall submit a written
time schedule to the Director for modifying the site to meet minimum requirements. The permittee shall
provide copies of revised plans and certification in writing to the Director that the changes have been made.
III. GENERAL CONDITIONS
1. This permit is not transferable. In the event there is a desire for the facilities to change ownership, or there
is a name change of the Permittee, a formal permit request must be submitted to the Division of Water
Quality accompanied by an application fee, documentation from the parties involved, and other supporting
materials as may be appropriate. The approval of this request will be considered on its merits and may or
may not be approved. Responsibility for compliance with all permit conditions remains with the Permittee
until such time as the Division approves the formal permit 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)
which have jurisdiction.
4. In the event that the facilities fail to perform satisfactorily, including the creation of nuisance conditions,
the Permittee shall take immediate corrective action, including those as may be required by this Division,
such as the construction of additional or replacement stormwater management systems.
5. The permittee grants DENR Staff permission to enter the property 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.
Permit issued this the 8th day of April, 2002
NORTH CAROLINA ENVIRONMENTAL MANAGEMENT COMMISSION
` ,� Gregory J. Thorpe, Pliff, Acting Direc or
1 ` Division of Water Quality
By Authority of the Environmental Management Commission
5

OFFICE USE ONLY
Date Received
Fee Paid
Permit Number
Q 17-01
-142OcO wae¢s&q
Sl u 8 oio vz-
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. Applicant's name (specify the name of the corporation, individual, etc. who owns the project):
Worsley Companies, Inc.
2. Print Owner/ Signing Official's name and title (the person legally responsible for facility and compliance):
William A. Ambrose, Executive Vice -President
3. Mailing Address for person listed in item 2 above:
10 South Cardinal Drive, P.O. Box 3227
City: Wilmington State: NC
Telephone Number: [phone]
Zip: 28406
4. Project Name (subdivision, facility, or establishment name - should be consistent with project name on plans,
specifications, letters, operation and maintenance agreements, etc.):
Rocky Point Scotchman #150
5. Location of Project (street address):
1-40 / 14wK 2l0 _Extt
City: Rocky Point County:
6. Directions to project (from nearest major intersection):
Pender
From Wilmington, take I-40 North to Hwy 210 off ramp. Go west on Hwy 210, go over the overpass.
The property is located at the corner of I40 and Hwy 210.
7. Latitude: k77.87704
Longitude: 34.43852
8. Contact person who can answer questions about the project:
Name: Gregory J. Hetzler, PE Telephone Number:
IL PERMIT INFORMATION:
1. Specify whether project is (check one): X New Renewal
of project
[phone]
Modification
Form: SWU-101 Version 3.99 Page 1 of 4

2. If this application is being submitted as the result of a renewal or modification to an existing permit, list
the existing permit number
3. Specify the type of project (check one):
and its issue date (if known)
Low Density X High Density Redevelop General Permit 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.
III. PROJECT INFORMATION
1. In the space provided below, summarize how stormwater will be treated. Also attach a detailed narrative (one
to two pages) describing stormwater management for the project.
Stormwater runoff from this project will be treated in a Wet Detention Pond sized for the 1" rainfall.
2. Stormwater runoff from this project drains to the Cape Fear River basin.
3. Total Project Area:
10.22
acres 4. Project Built Upon Area: 60.4 %
5. How many drainage areas does the project have?
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 Area 1
Drainage Area 2
Receiving Stream Name
Northeast Cape Fear River
Receiving Stream Class
BSW
Drainage Area
10.22 acres
Existing Impervious* Area
Proposed hn ervious* Area
6.18 acres
% hn ervious* Area (total)
60.4
-Impervious* Surface Area
Drainagc Area.1
Drwnage Area. 2
On -site Buildings
21,123 sf
On -site Streets
------
On-site Parking/Roadway
235,045 sf
On -site Sidewalks/Concrete
12,946 sf
Other on -site
------
Off site
------
Total: 269,114 sf
Total:
* 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?
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.
The following covenants are intended to ensure ongoing compliance with state stormwater management
permit 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 269,114 square feet of any lot shall be covered by structures or impervious
materials. Impervious materials include asphalt, gravel, concrete, brick, stone, slate or similar material
but do not include wood decking or the water surface of swimming 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
modification prior to construction.
5. All permitted runoff from outparcels or future developments shall be directed into the permitted
stormwater control system. These connections to the stormwater control system shall be pei formed 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
BUT specified for this project. Contact the Stormwater and General Permits Unit at [phone] for the status
and availability of these forms.
Form SWU-102
Wet Detention Basin Supplement
Form SWU-103
Infiltration Basin Supplement
Form SW-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 Supplement
Form SWU-109 Innovative Best Management Practice Supplement
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.
Form: SWU-101 Version 3.99 Page 3 of 4

1. Please indicate that you have provided the following required information by initialing 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 BUT
• 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 & 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 sormwater 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 AUTHORIZATIO9
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): McKim & Creed, P. A.
Mailing Address: 243 N. Front Street
City: Wilmington State: NC
Phone: [phone] Fax: [phone]
VIH. APPLICANT'S CERTIFICATION
Zip:
28401
I, (print or type name of person listed in General Information, item 2) William A. Ambrose
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.. ) n
Signature:
Date: /9?= f4-1'- D2_
Form: SWU-101 Version 3.99 Page 4 of 4

March 13, 2002
v C
M SCREED
M&C 00837.0013(10)
Ms. Linda Lewis
NC DENR - Division of Water Quality
127 Cardinal Drive Extension
Wilmington, NC 28406
RE: DWQ Project No. SW8 010912, Rocky Point Scotchman
Dear Linda:
This letter is in response to your fax dated 02/07/02 requesting additional items to be shown on
the grading plan for the above referenced project. Your comment is listed below in bold and
our response is listed in normal font.
Please provide the actual proposed contours for the 2 collection swales that drain to the pond.
Based on the proposed spot elevations shown, the north -south swale will be a tight squeeze
between the pond and the parking lot. I don't believe a 3:1 side slope can be achieved in that
swale. Please submit 2 copies of the revised grading plan.
The grading and drainage plan has been revised to add the proposed contours of the swales,
along with some additional spot elevations and a section of the swale at the pond. Please note
that a minimum 3:1 slope was achieved for all the swale side slopes.
Page 4 of the application has not been initialed.
Attached are two initialed copies of page 4 of the application.
Should you have any questions or require additional information, please contact me at (910)
343-1048.
Regards,
M IM R P.A.
Jeffery A. Roney
Sr. Designer
JAR/tab
Attachments: Page 4 of the Application
C104-Grading and Drainage Plan dated 09/13/01, revision #2, revision date
02/25/02
cc: Greg Hetzler, PE
Don Quinn
File 243 N. FRONT ST., WILMINGTON, NORTH CAROLINA 28401
S-\0837\0013\10-Comm\031302 DWQ R 11 Itr.doc
Pet. 910.343.1048 FAX [phone] www.mckimcreed.com
AA0002667

P. 1
COMMUNICATION RESULT REPORT ( FEB. 7.2002 11:58AM )
TTI NCDENR WIRO
FILE MODE OPTION ADDRESS (GROUP) RESULT PAGE
------------------------------------------------------------------------------------------------
229 MEMORY TX 9-2518282 OK P. 1/1
REASON FOR ERROR
E-1) HANG UP OR LINE FAIL
E-3) NO ANSWER
Date: February 79 2002
To: Jeff Roney, P.E.
Company: McKim and Creed
FAX #: [phone]
E-2) BUSY
E-4) NO FACSIMILE CONNECTION
Michael F, Easley, Governor
Wiliam G. Ross, Jr., Secretary
North Carolina Department of Environment and Natural Resources
FAX COVER SBEET
DWQ Stormwater Project Number: SW8 010912
Project Name: Rocky Point Scotchman #150
MESSAGE:
Dear Jeff-,
Gregory J. Thorpe, Ph.D., Acting Director
Division of Water Quality
Wilmington Reglonal Office
No. of Pages: 1
From: Linda LewisAO"`
Water Quality Section - Stormwater
FAX # [phone]
Phone # [phone]
Please provide the actual proposed contours for the 2 collection swales that drain, to the pond. Barad on the
proposed spot elevations shown, the north -south Swale will be a tight squeege between the pond and the parking
lot. I don't believe a 3 :1 side slope can be achieved in that swale. Please submit 2 copies ofthe revised grading plan.

Michael F. Easley, Governor
William G. Ross, Jr., Secretary
North Carolina Department of Environment and Natural Resources
FAX COVER SHEET
Date: February 7, 2002
To: Jeff Roney, P.E.
Company: McKim and Creed
FAX #: [phone]
DWQ Stormwater Project Number: SW8 010912
Project Name: Rocky Point Scotchman #150
MESSAGE:
Dear Jeff
Gregory J. Thorpe, Ph.D., Acting Director
Division of Water Quality
Wilmington Regional Office
No. of Pages: 1
From: Linda Lewis Arok�
Water Quality Section - Stormwater
FAX # [phone]
Phone # [phone]
Please provide the actual proposed contours for the 2 collection swales that drain to the pond. Based on the
proposed spot elevations shown, the north -south swale will be a tight squeeze between the pond and the parking
lot. I don't believe a 3:1 side slope can be achieved in that swale. Please submit 2 copies of the revised grading plan.
Page 4 of the application has not been initialed.
S:\WQS\STORMWAT\ADDINFO\010912.FEB
AM-
N.C. Division of Water Quality 127 Cardinal Drive Extension Wilmington, N.C. 28405 [phone] Fax [phone] Customer Service
800-623-7748

[REU t:l w Aso
V♦ 7�,�,��+s�*�7� DEC ���
,lrl 1�11r1C��.1�G�L BY: FTRANSMITTAL
TO. DENR
127 Cardinal Drive Extension
Wilmington, NC 28405
ATTENTION: Linda Lewis
DATE: I
December 13, 2001
PROJECT NO: 0837-0013
TASK NO: 4
RE: SCotchman Convenience Store #150
TRANSMITTAL NO: 1
PAGE 1 OF 1
WE ARE SENDING: ® Originals ® Prints ❑ Shop Drawings ❑ Samples
I"I Specifications Z Calculations ❑ Other -
Quantity
Drawing No.
Rev.
Description
Status
1
Response letter to request for additional information
G
3
Stormwater Management Permit Application Form
(1 original & 1 copy)
G
3
Wet Detention Basin Supplement (1 original & 1 copy)
G
3
Stormwater Treatment Worksheet (1 original & 1 copy)
G
I 3
C101, C102,
C104, & C106
---
Scotchman Store #150 Plans and Details dated 12/1210 i
G
_T
Issue Status Code:
Action Status Code:
REMARKS:
A. Preliminary B. Fabrication Only C. For Information D. Bid
E. Construction F. For Review & Comments G. For Approval H. See Remarks
1. No Exceptions Taken 2. Make Corrections Noted 3. Other
4. Amend & Resubmit 5. Rejected -See Remarks
243 NORTH FRONT STREET, WILMINGTON, NC 28401 [phone] FAX [phone]
cc: Don Quinn, Worsley Companies, Inc. & C
File 08370013 (40) // / IM ��=� , PA
Design ;jook.10
Sig
S:10837\0013\10-COMM1121301 Stormwater Permit Trans.doc

Basin
Stormwater Treatment Worksheet
Surface Area of Permanent Pool
Total Basin Area Ta := 10.22
Impervious Area la := 6.2
% Impervious Area I:= Ia •100
Ta
Permanent Pool Depth Pd := 6.5ft
RECEIVED
DEC 17 2001
DWQ
PRoa # SGu g 0 /D �l Z
acres ---- -------------------- ----------Drainage Area
acres ---------------------------Impervious Area
I = 60.665
90 % TSS Removal w/out Vegetative Filter TSS := 4.8 - --90% TSS removal
(form SAIDA table see attached copy) --------- -
Required Surface Area Sa := TSS Ta 43560
100
Sa = 21368.794 CuFt-------------------- Permanet Pool Surface Area
Surface Area Provided 21,497 see Reservoir Reports
1" Storm Volume to be Controlled
Schueler (1987) "Simple Method" of volume calculation
Rv := 0.05 + 0.009•I Rv = 0.596
1•Rv
TPVolume := Ta-43560 TPVolume = 2.2110.33
12
Volume to be drawn down over a period of two to five days
r AO

Temporary Pool Elevation and Volume Calculation
To provide the required storage, set the elevation of principle
spillway such that the required volume is contained between
the permanet pool elevation and the spillway elevation.
data .=
Ponds Stape/Storage Temporary Pool
23.5
0
24.2
15483
24.9
31854
26.3
67353
27
86532
Interpolated values:
fit(TPVolume) = 24.483
Information from
Reservoir Report
Temporary Pool Elevation
fit(TPElev) = 22110.33 CuFt-------- —--------- --------------------------Temporary Pool Volume
Permanent Pool Volume Calculation
PPElev := 23.5--------- ----------- —---- —------- —--------- —---- --------Permanet Pool Elevation
data
Ponds Stane/Storage Permanent Pool
17
0
20
27702
21
40072
22
55609
23
74465
23.5
84802
Information from
Reservoir Report
Interpolated values:
fit(PPElev) = 84802 CuFt--- ------- ----__------- — --- ___w_________--_-___Permanet Pool Volume
Forebay Calculation
A forebay is an excavated settling basin or a section separated by a low weir located
at the head of a wet detention pond to capture incoming sediment before it reaches the
main portion of the pond. The forebay volume should equal 20% of the basin volume
fit(PPElev)•20%=16960.4 CuFt----------------- ---------- -------------____Forebay Volume

Drawdown Orfice - 2 to 5 Day Detention
Os := 2 Inches-----------------------------------------------------------Orfrce Diameter
C := 0.6
rOs•.5 2
A :_ I 12 I A = 0.022
g := 32.17
h •_ TPElev — PPElev h = 0.492 1/2 Avg. Head
2
Q := C•A 2•g•h Q = 0.074
TT Volume
Q
3600.24 = 3.476 days -- ------- —----- ---------- ------- ---------- —------ --------- Drawdown Time

Reservoir Report Page 1
Reservoir No. 1 - Tempory Pool Volume
Hydraflow Hydrographs by Intelisolve
Pond Data
Bottom LxW = 146.6 x 146.6 ft Side slope = 3.0:1
Bottom elev.
= 23.50 ft Depth
= 3.50 ft
Stange { Storage Table
Stage (ft)
Elevation (ft)
Contour area (sqft) Incr. Storage (cuft)
Total storage (cuft)
0.00
23.50
21,497
0
0
0.17
23.67
23,293
3,789
3,789
0.35
23.85
25,160
3,843
7,632
0.52
24.02
27,100
3,898
11,530
0.70
24.20
29,111
3,953
15,483
0.88
24.38
31,195
4,008
-.19,492
1.05
24.55
33,350
4,064
-- 23,556
1.23
24.73
35,578
4,120
- 27,677
1.40
24.90
37,877
4,177
31,854
1.58
25.08
40,248
4,234
36,088
1.75
25.25
42,692
4,291
40,379
1.92
25.42
45,207
4,349
44,728
2.10
25.60
47,795
4,407
49,135
2.28
25.77
50,454
4,466
53,601
2.45
25.95
53,186
4,525
58,126
2.63
26.13
55,989
4,584
62,710
2.80
26.30
58,864
4,644
67,353
2.97
26.48
61,812
4,704
72,057
3.15
26.65
64,831
4,764
76,821
3.32
26.83
67,923
4,825
81,646
3.50
27.00
71,086
4,886
86,532
Culvert/ Orifice Structures
Weir Structures
[A]
[B] [C] [D]
[A] [B] [C]
[D]
Rise in
= 24.0
2.0 0.0 0.0
Crest Len ft
= 15.00 20.00 0.00
0.00
Span in
= 24.0
2.0 0.0 0.0
Crest El. ft
= 24.49 25.80 0.00
0.00
No. Barrels
= 1
1 0 0
Weir Coeff.
= 3.33 3.33 0.00
0.00
Invert El. ft
= 22.42
23.50 0.00 0.00
Weir Type
= Riser Rect
Length ft
= 75.0
1.0 0.0 0.0
Multistage
= Yes No No
No
Slope %
= 0.50
0.50 0.00 0.00
N-Value
= .013
.010 .000 .000
Orif. Coeff.
= 0.60
0.60 0.00 0.00
Multi -Stage
= n/a
No No No
Exfiltration
Rate
= 0.00 in/hr/sqft Tailwater Elev. = 0.00 ft
Note: All outFlows have been analyzed under inlet and
outlet control.
Stage / Storage / Discharge Table
Stage
Storage Elevation
Clv A Clv B Clv C
Clv D
Wr A
Wr B Wr C Wr D
Exfil
Total
ft
cuft ft
cfs cfs cfs
cfs
cfs
cfs cfs cfs
cfs
cfs
0.00
0 23.50
5.79 0.00 -
-
0.00
0.00 --
---
0.00
0.17
3,789 23.67
8.06 0.05 --
0.00
0.00 ---
--
0.05
0.35
7,632 23.85
9.75 0.08 -
0.00
0.00
--
0.08
0.52
11,530 24.02
11.51 0.10 -
--
0.66
0.00 -
0.76
0.70
15,483 24.20
14.97 0.12 -
-
11.81
0.00 --
11.93
0.88
19,492 24.38
17.77 0.14
---
29.81
0.00 -- --
17.91
1.05
23,556 24.55
20.19 0.15 -
-
52.63
0.00 -- -
--
20.34
1.23
27,677 24.73
22.35 0.16 ---
79.39
3.49 -- --
-
26.00
1.40
31,854 24.90
24.32 0.17 -
---
109.58 21.21 -- --
---
45.70
1.58
36,088 25.08
26.13 0.18 -
---
142.85 47.02 --
73.34
1.75
40,379 25.25
27.83 0.19 ---
-
178.95 78.87 - -
- -
106.90
1.92
44,728 25.42
0.00 0.00 ---
--
0.00
0.00 --- --
-
0.00
2.10
49,135 25.60
0.00 0.00 ---
---
0.00
0.00 ---
--
0.00
2.28
53,601 25.77
0.00 0.00 --
---
0.00
0.00 --
--
0.00
2.45
58,126 25.95
0.00 0.00 --
--
0.00
0.00 - --
--
0.00
2.63
62,710 26.13
0.00 0.00
-
0.00
0.00 -- ---
-
0.00
2.80
67,353 26.30
0.00 0.00 ---
---
0.00
0.00 -- ---
--
0.00
2.97
72,057 26.48
0.00 0.00 --
---
0.00
0.00 - -
0.00
3.15
76,821 26.65
0.00 0.00 --
---
0_00
0_00 --- --
---
0.00
3.32
81,646 26.83
0.00 0.00
0.00
0.00 ---
--
0.00
3.50
86,532 27.00
0.00 0.00 ---
---
0.00
0.00 -- - -
--
0.00

Reservoir Report Page 1
Reservoir No. 2 - Permanent Pool Volume Hydraflow Hydrographs by Intelisolve
Pond Data
Pond storage is based on known contour areas. Average end area method used.
Stage / Storage Table
Stage (ft)
Elevation (ft)
Contour area (sqft)
Incr. Storage (cult)
Total storage (cult)
0.00
17.00
7,080
0
0
1.00
18.00
8,458
7,769
7,769
2.00
19.00
9,940
9,199
16,968
3.00
20.00
11,527
10,734
27,702
4.00
21.00
13,214
12,371
40,072
5.00
22.00
17,859
15,537
55,609
6.00
23.00
19,853
18,856
74,465
6.50
23.50
21,497
10,338
84,802
Culvert /
Orifice Structures
Weir Structures
[A]
[B]
[C]
[D]
[A] [B]
[C]
[D]
Rise in
= 0.0
0.0
0.0
0.0
Crest Len ft
= 0.00 0.00
0.00
0.00
Span in
= 0.0
0.0
0.0
0.0
Crest El. ft
= 0.00 0.00
0.00
0.00
No. Barrels
= 0
0
0
0
Weir Coeff.
= 0.00 0.00
0.00
0.00
Invert El. ft
= 0.00
0.00
0.00
0.00
Weir Type
= -
--
Length ft
= 0.0
0.0
0.0
0.0
Multi -Stage
= No No
No
No
Slope %
= 0.00
0.00
0.00
0.00
N-Value
.000
.000
.000
.000
Orif. Coeff.
0.00
0.00
0.00
0.00
Multi -Stage
= n/a
No
No
No
Exfiltration Rate
= 0.00 in/hr/sgft Tailwater Elev.
= 0.00 ft
Note: All outflows have been analyzed under inlet and outlet control.
Stage /Storage
/Discharge Table
Stage
Storage Elevation
Clv A Clv
B Clv
C Clv D Wr A
Wr B Wr C
Wr D
Exfil
Total
ft
cuft ft
cfs
cis
cfs
cfs cfs
cfs cfs
cfs
cfs
cfs
0.00
0 17.00
--
-
- ---
--- -
---
--
0.00
1.00
7,769 18.00
--
--
-- --
-- -
--
--
0.00
2.00
16,968 19.00
---
--
-- --
- --
--
0.00
3.00
27,702 20.00
--
- -
--
--
- - -
--
0.00
4.00
40,072 21.00
-
---
--
-- --
---
-
---
0.00
5.00
55,609 22.00
-
--
--
--
-- --
---
---
0.00
6.00
74,465 23.00
-
---
--
--
-
--
0.00
6.50
84,802 23.50
---
---
--
-- --
- -
--
0.00

Reservoir Report Page 1
Reservoir No. 3 - Forebay Volume
Hydraflow Hydrographs by Intelisolve
Pond Data
Bottom LxW = 37.5 x 37.5 ft
Side slope = 2.0:1
Bottom elev.
= 17.00 ft Depth
= 6.50 ft
Stage I Storage Table
Stage (ft) Elevation (ft) Contour area (sqft) Incr. Storage (cuft)
Total storage (cuft)
0.00 17.00
1,406
0
0
0.32 17.33
1,722
473
473
0.65 17.65
2,070
506
979
0.97 17.98
2,450
540
1,519
1.30 18.30
2,862
575
2,093
1.63 18.63
3,306
611
2,704
1.95 18.95
3,782
648
3,352
2.28 19.27
4,290
686
4,038
2.60 19.60
4,830
726
4,764
2.93 19.92
5,402
766
5,530
3.25 20.25
6,006
808
6,338
3.58 20.58
6,642
850
7,188
3.90 20.90
7,310
894
8,082
4.23 21.23
8,010
939
9,021
4.55 21.55
8,742
985
10,006
4.88 21.88
9,506
1,032
11,038
5.20 22.20
10,302
1,080
12,118
5.52 22.52
11,130
1,129
13,248
5.85 22.85
11,990
1,180
14,428
6.17 23.17
12,882
1,231
15,659
6.50 23.50
13,806
1,284
16,943
Culvert / Orifice Structures
Weir Structures
[A] [B]
[C]
[D]
[A] [B] [C]
[D]
Rise in = 0.0 0.0
0.0
0.0
Crest Len ft
= 0.00 0.00 0.00
0.00
Span in = 0.0 0.0
0.0
0.0
Crest El. ft
= 0.00 0.00 0.00
0.00
No. Barrels = 0 0
0
0
Weir Coeff.
= 0.00 0.00 0.00
0.00
Invert El. ft = 0.00 0.00
0.00
0.00
Weir Type
= - ---
Length ft = 0.0 0.0
0.0
0.0
Multi -Stage
= No No No
No
Slope % = 0.00 0.00
0.00
0.00
N-Value = .000 .000
.000
.000
Orif. Coeff. = 0.00 0.00
0.00
0.00
Multi -Stage = n/a No
No
No
Exfiltration Rate
= 0.00 in/hr/sgft Tailwater Elev. = 0.00 ft
Note: All outflows have been analyzed under inlet and outlet control.
Stage / Storage / Discharge Table
Stage Storage Elevation Clv
A CIv
B Clv C
Clv D Wr A
Wr B Wr C Wr D
Exfil
Total
ft cuft ft cfs
cfs
cfs
cfs cis
cfs cfs cfs
cfs
cfs
0.00 0 17.00
---
-- -
-- --
---
0.00
0.32 473 17.33 --
-
---
-- --- ---
0.00
0.65 979 17.65 ---
-
- -
-- -- --
-
0.00
0.97 1,519 17.98 --
---
--
--- ---
- --
-
0.00
1.30 2,093 18.30 --
- -
--- --
---
0.00
1.63 2,704 18.63 --
-
--
--
-- - --
---
0.00
1.95 3,352 18.95 --
-
--
--- ---
-- -
---
0.00
2.28 4,038 19.27 ---
---
--
--- ---
-- -
--
0.00
2.60 4,764 19.60
---
---
--- ---
--- --
--
0.00
2.93 5,530 19.92 -
- -
- --
--- --- ---
--
0.00
3.25 6,338 20.25
-
--
-- ---
--- -
0.00
3.58 7,188 20.58 ---
--
-
- --- -
---
0.00
3.90 8,082 20.90 ---
--
--
---
-_
0.00
4.23 9,021 21.23 ---
--
-
-- --
- -
-
0.00
4.55 10,006 21.55
-
--
---
- -
---
0.00
4.88 11,038 21.88 ---
-
--
--
-- - -
---
0.00
5.20 12,118 22.20 -
-
---
---
-- - -
0.00
5.52 13,248 22.52 --
- -
--- - -
--
0.00
5.85 14,428 22.85
--
-
- -.-
-- --- --
0.00
6.17 15,659 23.17 ---
--
- --
-- - -
0.00
6.50 16,943 23.50 ---
--
--
- -
- -
0.00

r,PMCK1N4&CREED
December 12, 2001
Linda Lewis
NCDENR Division of Water Quality
127 Cardinal Drive Extension
Wilmington, NC 28405-3845
RE: Request for Additional Information
Stormwater Project No. SW8010912
Rocky Point Scotchman #150
Pender County
Dear Ms. Lewis:
M&C 00837-0013
RECEIVED
DEC 17 2001
DWQ
PROD
The following is in response to your letter of November 21, 2001, regarding the above
referenced project.
1. Please show the proposed grading and provide the inverts for the proposed swales
adjacent to the truck parking area and the hotel parking area.
Additional spot elevations have been added to the plans.
2. Please list the specific wetland plants to be planted on the 6:1 shelf, and remove the part
of the note that says " ... or vegetation". Vegetation covers a variety of plans and not all
of them are suitable wetland species. Chapter 2 of the BMP document contains a listing
of suitable wetland plants.
The detail has been revised.
3. Please label what the permanent pool elevation is on Pond Section A, or be consistent
with the other details and label it NWSE.
.The detail has been reprised to reflect NWSE.
4. Please label the outlet structure on the plan sheets and plan view detail. It is currently
shown as an unlabeled square.
The plans have been revised.
5. Please include the forebay in the Pond A Section detail.
The detail has been revised.
SA0837A0013110-COMM1121201 LewisResp0r2111rf4FcFRONT ST., WILMINGTON, NORTH CAROLINA 28401
TEL [phone] FAX [phone] www.mckimcreed.com
AA0002667

Linda Lewis
December 12, 2001
Page 2
6. Please provide finished spot elevations for the perimeter access road along the west and
south property lines.
Additional spot elevations have been added to the plans.
7. If there is an existing ditch along the west property line, please label it. Otherwise,
please account for the offsite drainage from the property to the west.
There is an existing ditch and plans have been revised to indicate the ditch.
8. The legend on the drainage and grading plan is very incomplete. The same symbol is
used to represent the temporary diversion ditch on the SEC plan and the proposed
swales on the grading plan. Please provide a complete legend.
The SEC plan has been revised. This will be a permanent swate in both cases.
9. The sediment accumulation depth specified on the supplement for the main pond. is only
1.6'. A minimum of 3' of depth must be provided at all times. Please revise this to 4.9'.
The form has been revised.
10. The permanent pool volume reported on the supplement is 92,742 cubic feet. Twenty
percent of that volume is 18,548 cubic feet, which must be provided in the forebay, but
only 4,391 cubic feet is reported. A range of 18%-22% is acceptable. Too little volume in
the forebay defeats the purpose of having a forebay, and too much volume affects the
treatment in the main pond by taking away surface area at the design depth. Please
.correct and revise.
I have revised the calculations. The correct permanent pool volume should be
75,393 cu. ft., the 92,742 volume reported, was the permanent and temporary pool
volumes added together. The calculations and application have been revised.
Additionally, a reservoir report for the permanent pools stage /storage
information is included. The fore bay has also been recalculated and should be
15,079 cu. ft. of the 75,393 cu. ft. permanent pool volume. A reservoir report for the
fore bays stage / storage information is also included.
11. How did you determine that a volume of 4,391 cubic feet had been provided in the
forebay? None of the calculations has any pond surface area information below
permanent pool. Please provide forebay calculations and show the pond surface areas
below permanent pool.
Please see response to comment 10 above.
SA083710013110-COMM1121201 Lewis Response Ur.doc
v M�IdM&CREED
v

Linda Lewis
December 12, 2001
Page 3
12. The rules require that, in the case of corporations, a person of at least the level of vice
president sign the application. If someone else signs, a signed authorization must be
provided from the president or vice president.
The application has been re -signed by an authorized person of Worsley
Companies Inc. per NCDENR requirements
Sincerely,
/bhc
cc: Don Quinn
&X063T001300-COMM1121201 Lewis Response Ur.doc 46
v MCKIM&CREM

Michael F. Easley, Governor
William G. Ross, Jr., Secretary
North Carolina Department of Environment and Natural Resources
Gregory J. Thorpe, Ph.D., Acting Director
Division of Water Quality
Wilmington Regional Office
November 21, 2001
Mr. Don Quinn, Construction Maintenance Manager
Worsley Companies, Inc.
PO Box 3227
Wilmington, NC 28406
Subject: REQUEST FOR ADDITIONAL INFORMATION
Stormwater Project No. SW8 010912
Rocky Point Scotchman #150
Pender County
Dear Mr. Quinn:
The Wilmington Regional Office received a Stormwater Management Permit Application for Rocky Point
Scotchman #150 on September 17, 2001. A preliminary review of that information has determined that the
application is not complete. The following information is needed to continue the stnrrnwatr*r r�vie-.w-
1. Please show the proposed grading and provide the inverts for the proposed swales adjacent the truck
parking area and the hotel parking area.
2. Please list the specific wetland plants to be planted on the 6:1 shelf, and remove the part of the note
that says "...or vegetation". Vegetation covers a variety of plants and not all of them are suitable
wetland species. Chapter 2 of the BMP document contains a listing of suitable wetland plants.
3. Please label what the permanent pool elevation is on Pond Section A, or be consistent with the other
details and label it NWSE.
4. Please label the outlet structure on the plan sheets and plan view detail. It is currently shown as an
unlabeled square.
S. Please include the forebay in the Pond A Section detail.
6. Please provide finished spot elevations for the perimeter access road along the west and south
property lines.
7. If there is an existing ditch along the west property line, please label it. Otherwise, please account
for the offsite drainage from the property to the west.
8. The legend on the drainage and grading plan is very incomplete. The same symbol is used to
represent the temporary diversion ditch on the SEC plan and the proposed swales on the grading
plan. Please provide a complete legend.
9. The sediment accumulation depth specified on the supplement for the main pond is only 1.6'. A
minimum of 3' of depth must be provided at all times. Please revise this to 4.9'.
AM
A i~R
N.C. Division of Water Quality 127 Cardinal Drive Extension Wilmington, N.C. 28405 [phone] Fax [phone] Customer Service
800-623-7748

Mr. Quinn
November 21, 2001
Stormwater Project No. SW8 010912
10. The permanent pool volume reported on the supplement is 92,742 cubic feet. Twenty percent of that
volume is 18,548 cubic feet, which must be provided in the forebay, but only 4,391 cubic feet is
reported. A range of 18%-22% is acceptable. Too little volume in the forebay defeats the purpose
of having a forebay, and too much volume affects the treatment in the main pond by taking away
surface area at the design depth. Please correct and revise.
11. How did you determine that a volume of 4,391 cubic feet had been provided in the forebay? None
of the calculations has any pond surface area information below permanent pool. Please provide
forebay calculations and show the pond surface areas below permanent pool.
12. The rules require that, in the case of corporations, a person of at least he level of vice president sign
the application. If someone else signs, a signed authorization must be provided from the president
or vice president.
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 December 21, 2001, 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 need additional time to submit the information, please mail or fax your request for a time extension
to the Division at the address and fax number at the bottom of this letter. The request must indicate the date by
which you expect to submit the required information. The Division is allowed 90 days from the receipt of a
completed application to issue the permit.
The construction of any impervious surfaces, other than a construction entrance under an approved
Sedimentation Erosion Control Plan, is a violation of NCGS 143-215.1 and is subject to enforcement action
pursuant to NCGS 143-215.6A.
Please reference the State assigned proj ect number on all correspondence. Any original documents that need
to be revised have been sent to the engineer or agent. All original documents must be returned or new originals must
be provided. Copies are not acceptable. If you have any questions concerning this matter please feel free to call me
at [phone].
Sincerely,
4wdll�u V4"
Linda Lewis
Environmental Engineer
RSS/arl: S:\WQS\STORMWAT\ADDINFO\010912.NOV
cc: Linda Lewis
Jeff Roney, Project`Engineer

LETTER OF TRANSMITTAL
DATE: September 14, 2001
RE: Scotchman Convenience Store #150
WE ARE SENDING: ® Originals Z Prints ❑ Shop Drawings ❑ Samples
❑ Specifications Z Calculations ® Other - Stormwater Submittal
Quantity Drawing No. Rev. Description Status
1 --- --- $420.00 Application Fee Check G
2 --- --- Stormwater Management Permit Application Form G
dated 08-30-01 (1 original and 1 copy)
2 --- --- Wet Detention Basin Supplement Form dated 08-30-01 G
(1 original and 1 copy)
2 --- --- Stormwater Design Narrative and Supporting Calculations G
dated 08-31-01
2 Cover, C101, --- Scotchman Store #150 Plans and Details dated 09-13-01 tGj
C102, C104,
C105 & C106
Issue Status Code: A. Preliminary B. Fabrication Only C. For Information D. Bid
E. Construction F. For Review & Comments G. For Approval H. See Remarks
Action Status Code: 1. No Exceptions Taken 2. Make Corrections Noted 3. Other
4. Amend & Resubmit 5. Rejected -See Remarks
REMARKS:
,/1 n
�✓8 oia qi�
cc: Don Quinn, Worsley Companies, Inc.
File 08370013 (40)
Design Book
243 NORTH FRONT STREET, WILMINGTON, NC 28401 [phone] FAX [phone]
I CR ,PA
Signed
S:\0837\0013\10-Comm\090701 TRANSMIT storm.doc

STORMWATER DESIGN NARRATIVE
AND
SUPPORTING CALCULATIONS
SCOTCHMAN CONVENIENCE STORE #150
and
Motel
ROCKY POINT, NC
Pender County, North Carolina
Project #0837-0013 (40)
August 31, 2001 RECEIV.ED
SEP 17 2001
G Prepared for: �'S OWQ
(Dq' 2
PROD #
Worsley Companies, Inc.
10 South Cardinal Drive
P.O. Box 3227
Wilmington, North Carolina 28406
(910) 7692442
August 31, 2001
3 (40)
I'll
AXLLI�
McKim and Creed Engineers
243 North Front Street
Wilmington, North Carolina 28401
[phone]

C
STORMWATER DESIGN NARRATIVE
AND
SUPPORTING CALCULATIONS
SCOTCHMAN CONVENIENCE STORE #150
and
Motel
ROCKY POINT, NC
Pender County, North Carolina
Project #0837-0013 (40)
August 31, 2001
Table of Contents
INDEX
Design Narrative
Stormwater Treatment Worksheet
Stormwater Pond Data
Hydrograph Summary Reports
10, 25, 100 year storm events
Surface Area to Drainage Area Ratios
(SA/ DA)
Runoff Curve Numbers (RCN) Table
10, 25, 100 year Rainfall Data Maps
24-HR (1-Day) Intensities
Stream Classification Descriptions
Pender County SCS Soils Information
Engineering Site Plans
page 3-4
Page 5-6
Page 7
Page 8-10
Page 11
Page 12
Page 13-15
Page 16-18
Page 19-24
Survey, C101, C102, C104, C105 and C107

SCOTCHMAN CONVENIENCE STORE #150
ROCKY POINT, NC
Pender County, North Carolina
Project #0837-0013 (40)
August 31, 2001
Design Narrative
Worsley Companies, Inc. is proposing development, which will include construction of a
Scotchman Convenience Store, a Motel, and infrastructure. Internal drives, parking, utilities and
stormwater management improvements would be constructed to serve this project. The site
contains approximately 10.22 acres of open property. The site is located in Rocky Point, NC at
the western quadrant of 1- 40 and NC 210 interchange Mile -Marker (MM) 408.
Ortho-photo of 1-40 and NC 210
Areas to the west of the site have developed business areas. To the North the site abuts NC
210. To the East the site abuts the 1-40 Rights -of -Ways. To the South a mixture of pasture
and wooded undeveloped areas surround the site. Terrain on the site slopes toward the East
property line, to the Right-of-way of US 1-40. The land previously was cleared, likely for
agricultural uses.
Page 3 of 4
S:1083710013120-Tech1STORMWATER DESIGN NARRATIVE.doc

The Soil Survey of Pender County indicates that the soils within the project area are Autryville,
Foreston, Goldsboro and Muckalee. The area of the proposed stormwater pond is located in the
Muckalee soil, this soil type is in a hydrologic group "D", it has an apparent high water table at
0.5 to 1.5 feet below grade and the infiltration is less that 2.0 inches per hour, all of these soil
characteristics will benefit and support of a wet detention pond. The project is within the
drainage basin that drains to the Northeast Cape Fear River, sub basin CPF23, stream index
number 18-74-(47.5), map number J27NE4, stream class B SW.
Land Management Group (LMG) of Wilmington NC conducted a site investigation for the
purpose of reviewing any potential impact to wetland areas. LMG's has reported wetlands were
not evidenced. The site was generally determined to have well-defined plow zone strata,
indicative of recent agricultural activities, overlying well drained light tan Sandy Loam soils.
Supporting drainage calculations, drainage basin and pond information are provided within the
following pages of this report.
Stormwater runoff from the proposed site would be conveyed to a wet detention pond via paved
overland flow, grassed swales and stormwater piping. The subsurface storm drain piping
system has been designed sized to accommodate runoff from a 24-hr 10-year storm event.
Stormwater treatment from the proposed improvements will be provided in the wet detention
pond designed in accordance with NCDENR Best Management Practices (BMP) requirements.
The pond's designed length to width ratio is approximately 3:1, and includes a fore -bay volume
of 20% of the basin's overall volume. Pond side slopes are 3H to 1V, with 6H to 1V planted
littoral shelf. The littoral shelf is provided just below the control water surface elevation. The
permanent pool depth is 5 feet.
The pond has been sized to detain the 1" rainfall volume from the projects drainage basins. The
1" rainfall volume will draw down throw a 2" orifice in 2.83 days. Stormwater in excess of the 1"
rainfall volume will overflow the pond's riser structure and discharge to the Right-of-way of US I-
40. The water elevation of the pond's permanent pool is 23.5 ft. Draw down orifice elevation is
set at this elevation. The 1" runoff rainfall volume elevation is 24.49 ft. This elevation is the
elevation of the overflow riser structure. The water elevation of the pond realizes an elevation of
25.43 ft during a 24-hour 10-year storm event. The 24-hour 25-year storm event water
elevation of the pond is at 25.80 ft. This elevation is also the elevation of the emergency
overflow, which discharges from the pond to the right-of-way of US 1-40. The 24-hour 100-year
storm event water elevation of the pond is at 26.18 ft, approximately 10" below the pond berm
elevation at 27.00 ft.
Page 4of4
S:1083710013120-Tech1STORMWATER DESIGN NARRATIVE.doc

Rocky Point
Scotchman #150
Basin
Stormwater Treatment Worksheet
Surface Area of Permanent Pool
Total Basin Area Ta := 10.22 1-1/
Impervious Area Ia := 6.2 l�
% Impervious Area 1:= Ia .100 I = 60.6654&� l"'
Ta
Permanent Pool Depth Pd := 5ft
90 % TSS Removal w/out Vegetative Filter
(form SA/DA table see attached copy) TSS := 4.8
Required Surface Area Sa := TSS Ta•43,560 Sa = 21,368.794 v
100
Surface area (El. 23.5 Provided '
of Ponds = 21,500 sf
1" Storm Volume to be Controlled
Schueler (1987) "Simple Method" of volume calculation
Rv := 0.05 + 0.009-I Rv = 0.596
Volume 1 • Rv12 •Ta-43560 Volume = 22�110.33
Volume to be drawn down over a period of two to five days
Forebay Design
A forebay is an excavated settling basin or a section separated by a low weir located
at the head of a wet detention pond to capture incoming sediment before it reaches the
main portion of the pond. The forebay volume should equal 20% of the basin volume
Forebay Volume Volume-20% = 4,422.066 cf ,
V

Reservoir Report
Page 1
Reservoir No. 1 - Stormwater Pond English
Pond Data
Bottom area = 21500.0 sqft Side slope = 3.0:1 Bottom elev. = 23.50 ft Depth = 3.50 ft
Stage / Storage Table
Stage
Elevation
Contour area
Incr. Storage
Total storage
ft
ft
sqft
cuft
cuft
0.00
23.50
21,500
0
0
0.35
22,120
7,634
7,634
0.70
24.20Z y,ti q
22,749
7,854
✓,
15,487 22_11ip
1.05
2,4.55.-
23,387
8,079
23,566 !
1.40
24.90
24,034
8,308
31,874
1.75
25.25
24,689
8,542
40,416
2.10
25.60
25,354
8,781
49,196
2`.45
25.95
26,027
9,024
58,221
2.80
26.30
26,709
9,272
67,493
3.15
26.65
27,400
9,525
77,017
3.50
27.00
28,099
9,782
86,799
Culvert / Orifice Structures
Weir Structures
[A]
[g] [C]
[D]
[A]
[B]-
[C]
[D]
Rise in =
24.0
2.0 0.0
0.0
Crest Len ft =
15.00
�20.00
0.00
0.00
Span in =
24.0Z
2.0 0.0
0.0
Crest El. ft =
24.49
25.80
0.00
0.00
No. Barrels =
1 ✓
1 0
0
Weir Coeff.
3.00
3.00
0.00
0.00
Invert El. ft =
22.42
23.50 0.00
0.00
Eqn. Exp.
1.50
1.50
0.00
0.00
Length ft =
75.0
1.0 0.0
0.0
Multi -Stage =
Yes
No
No
No
Slope % =
0.50
0.50 0.00
0.00
N-Value =
.013
.010 .000
.000
Orif. Coeff. =
0.60
0.60 0.00
0.00
Multi -Stage =
-----
No No
No
Tailwater Elevation =
0.00 ft
Stage !Storage /Discharge
Table
Note: All outflows have been analyzed under inlet and outlet control.
Stage Storage
Elevation
Clv A
Clv B Clv C
Clv D Wr A
Wr B
Wr C
Wr D
Discharge
ft cuft
ft
cfs
cfs cfs
cfs cfs
cfs
cfs
cfs
cfs
0.00 0
2g3 ,ram,
5.79
0.00 ---
--- 0.00
0.00
--
---
0.00
0.35 7,634
23.85
8.06
0.05 ---
--- 0.00
0.00
---
---
0.05
0.70 15,487
24.20
9.75
0.08 ---
--- 0.00
0.00
---
---
0.08
1.05 23,566
24.55
11.51
0.10 ---
-- 0.66
0.00
--
---
0.76
1.40 31,874
24.90
14.97
0.12 ---
--- 11.81
0.00
---
--
11.93
1.75 40,416
25.25
17.77
0.14 --
-- 29.81
0.00
---
-
17.91
2.10 49,196
25.60
20.19
0.15 ---
--- 52.63
0.00
---
---
20.34
2.45 58,221
25.95
22.35
0.16 ---
--- 79.39
3.49
---
---
26.00
2.80 67,493
26.30
24.32
0.17 --
--- 109.58
21.21
--
---
45.70
3.15 77,017
26.65
26.13
0.18 ---
--- 142.85
47.02
---
---
73.34
3.50 86,799
27.00
27.83
0.19 ---
--- 178.95
78.87
---
---
106.90

Hydrograph Summary Report
Page 1
Hyd.
No.
Hydrograph
type
(origin)
Peak
flow
(cfs)
Time
interval
(min)
Time to
peak
(min)
Volume
(cuft)
Return
period
(yrs)
Inflow
hyd(s)
Maximum
elevation
(ft)
Maximum
storage
(cuft)
Hydrograph
description
1
SCS Runoff 39.25 5
725
164,965
25
---
--
Basin A
2
Reservoir 21.65 5
745
161,740
25
1
25.80
54,345
Route
Proj. file: DRAINAGE.GPW
OF file: WilmlDF.IDF
-T
Run date: 08-09-2001
0

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