SW8040609_HISTORICAL FILE_20040701

STORMWATER DIVISION CODING SHEET
POST -CONSTRUCTION PERMITS
PERMIT NO.
SW.��
DOC TYPE
❑ CURRENT PERMIT
❑ APPROVED PLANS
HISTORICAL FILE
❑ COMPLIANCE EVALUATION INSPECTION
DOC DATE
ZP%�07,U�
YYYYMMDD

State Stormwater Management Systems
Permit No. SW8 040609
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
Southern States Chemical Inc.
Southern States Laydown Yard
New Hanvoer 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'D 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 July 1, 2014, 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 in Section I.6 on page 3 of this permit. The stormwater control has been
designed to handle the runoff from 283,409 square feet of impervious area.
3. The tract will be limited to the amount of built -upon area indicated on page 3 of this
permit, and per approved plans.
4. All stormwater collection and treatment systems must be located in either dedicated
common areas or recorded easements. The final plats for the project will be recorded
showing all such required easements, in accordance with the approved plans.
5. The runoff from all built -upon area within the permitted drainage area of this project must
be directed into the permitted stormwater control system.
2

State Stormwater Management Systems
Permit No. SW8 040609
6. The following design criteria have been provided in the wet detention pond and must be
maintained at design condition:
a.
b.
C.
d.
e.
f.
9-
h.
i.
J•
k.
1.
m
n.
Drainage Area, acres:
8.20
Onsite, ft2:
357,110
Offsite, ft2:
None, per engineer
Total Impervious Surfaces, ft2:
283,409
Design Storm, inches:
1"
Pond Depth, feet:
4.0
TSS removal efficiency:
90%
Permanent Pool Elevation, FMSL: 4.3
Permanent Pool Surface Area, ft2: 33,192
Permitted Storage Volume, ft3: 27,801
Temporary Storage Elevation, FMSL: 5.0
Controlling Orifice: 2.0460 pipe
(The orifice must drawdown the 1" volume in 2-5 days)
Permitted Forebay Volume, ft3:
Receiving Stream/River Basin:
Stream Index Number:
Classification of Water Body:
111. SCHEDULE OF COMPLIANCE
16,723
NE Cape Fear River / Cape Fear
18-74-(61)
"SC; Sw"
1. The stormwater management system shall be constructed in its entirety, vegetated and
operational for its intended use prior to the construction of any built -upon surface.
2. During construction, erosion shall be kept to a minimum and any eroded areas of the
system will be repaired immediately.
3. The permittee shall at all times provide the operation and maintenance necessary to assure
the permitted stormwater system functions at optimum efficiency. The approved
Operation and Maintenance Plan must be followed in its entirety and maintenance must
occur at the scheduled intervals including, but not limited to:
a. Semiannual scheduled inspections (every 6 months).
b. Sediment removal.
C. Mowing and revegetation of slopes and the vegetated filter.
d. Immediate repair of eroded areas.
C. Maintenance of all slopes in accordance with approved plans and specifications.
f. Debris removal and unclogging of outlet structure, orifice device, flow spreader,
catch basins and piping.
g. Access to the outlet structure must be available at all times.
4. Records of maintenance activities must be kept and made available upon request to
authorized personnel of DWQ. The records will indicate the date, activity, name of
person performing the work and what actions were taken.
3

State Stormwater Management Systems
Permit No. SW8 040609
Decorative spray fountains will be allowed in the stormwater treatment system, subject to
the following criteria: -
a. The fountain must draw its water from less than 2' below the permanent pool
surface.
b. Separated units, where the nozzle, pump and intake are connected by tubing, may
be used only if they draw water from the surface in the deepest part of the pond.
c. The falling water from the fountain must be centered in the pond, away from the
shoreline.
d. The maximum horsepower for a fountain in this pond is 1/3 horsepower.
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.
If the stormwater system was used as an Erosion Control device, it must be restored to
design condition prior to operation as a stormwater treatment device, and prior to
occupancy of the facility.
9. Access to the stormwater facilities shall be maintained via appropriate easements at all
times.
10. The permittee shall submit to the Director and shall have received approval for revised
plans, specifications, and calculations prior to construction, for any modification to the
approved plans, including, but not limited to, those listed below:
a. Any revision to any item shown on the approved plans, including the stormwater
management measures, built -upon area, details, etc.
b. Project name change.
C. Transfer of ownership.
d. Redesign or addition to the approved amount of built -upon area or to the drainage
area.
e. Further subdivision, acquisition, lease or sale of all or part of the project area. The
project area is defined as all property owned by the permittee, for which
Sedimentation and Erosion Control Plan approval or a CAMA Major permit was
sought.
f. Filling in, altering, or piping of any vegetative conveyance shown on the approved
plan.
11. The permittee shall submit final site layout and grading plans for any permitted future
areas shown on the approved plans, prior to construction.
12. A copy of the approved plans and specifications shall be maintained on file by the
Permittee for a minimum of ten years from the date of the completion of construction.
13. The Director may notify the permittee when the permitted site does not meet one or more
of the minimum requirements of the permit. Within the time frame specified in the notice,
the permittee shall submit a written time schedule to the Director for modifying the site to
meet minimum requirements. The permittee shall provide copies of revised plans and
certification in writing to the Director that the changes have been made.
4

State Stormwater Management Systems
Permit No. SW8 040609
III. GENERAL CONDITIONS
This permit is not transferable except after notice to and approval by the Director. In the
event of a change of ownership, or a name change, the permittee must submit a formal
permit transfer request to the Division of Water Quality, accompanied by a completed
name/ownership change form, documentation from the parties involved, and other
supporting materials as may be appropriate. The approval of this request will be
considered on its merits and may or may not be approved. The permittee is responsible
for compliance with all permit conditions until such time as the Division approves the
transfer request.
2. Failure to abide by the conditions and limitations contained in this permit may subject the
Permittee to enforcement action by the Division of Water Quality, in accordance with
North Carolina General Statute 143-215.6A to 143-215.6C.
3. The issuance of this permit does not preclude the Permittee from complying with any and
all statutes, rules, regulations, or ordinances, which may be imposed by other government
agencies (local, state, and federal) having jurisdiction.
4. In the event that the facilities fail to perform satisfactorily, including the creation of
nuisance conditions, the Permittee shall take immediate corrective action, including those
as may be required by this Division, such as the construction of additional or replacement
stormwater management systems.
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.
Unless specified elsewhere, permanent seeding requirements for the stormwater control
must follow the guidelines established in the North Carolina Erosion and Sediment
Control Planning and Design Manual.
8. Approved plans and specifications for this project are incorporated by reference and are
enforceable parts of the permit.
9. The permittee shall notify the Division any name, ownership or mailing address changes
within 30 days.
Permit issued this the 1 st day of July 2004.
NORTH CAROLINA ENVIRONMENTAL MANAGEMENT COMMISSION
Alan W. Klimek, P.E-, Director
Division of Water Quality
By Authority of the Environmental Management Commission

State Stormwater Management Systems
Permit No. SW8 040609
Southern States Laydown Yard
Stormwater Permit No. SW8 040609
New Hanover County
Designer's Certification
I, , as a duly registered in the
State of North Carolina, having been authorized to observe (periodically/ weekly/ full time) the
construction of the project,
(Project)
for (Project Owner) hereby state that, to the best of
my abilities, due care and diligence was used in the observation of the project construction such
that the construction was observed to be built within substantial compliance and intent of the
approved plans and specifications.
The checklist of items on page 2 of this form is included in the Certification.
Noted deviations from approved plans and specification:
Signature
Registration Number
Date
SEAL
6

State Stormwater Management Systems
Permit No. SW8 040609
Certification Requirements:
1. The drainage area to the system contains approximately the permitted acreage.
2. The drainage area to the system contains no more than the permitted amount of
built -upon area.
3. All the built -upon area associated with the project is graded such that the runoff
drains to the system.
4. All roof drains are located such that the runoff is directed into the system.
5. The outlet/bypass structure elevations are per the approved plan.
6. The outlet structure is located per the approved plans.
7. Trash rack is provided on the outlet/bypass structure.
8. All slopes are grassed with permanent vegetation.
9. Vegetated slopes are no steeper than 3:1.
10. The inlets are located per the approved plans and do not cause short-circuiting of
the system.
H . The permitted amounts of surface area and/or volume have been provided.
12. Required drawdown devices are correctly sized per the approved plans.
13. All required design depths are provided.
14. All required parts of the system are provided, such as a vegetated shelf, and a
forebay.
15. The required system dimensions are provided per the approved plans.
cc: NCDENR-DWQ Regional Office
New Hanover County Building Inspections
7

LETTER OF TRANSMITTAL pswl<WDI
community infr structure consultants
909 Market Street Wilmington, North Carolina 28401
TO: NCDENR
Division of Water Quality
Attn: Laurie Munn
910.762.4200 tel. 9
BY: _ ^�
DATE: 6/30/04
RE: Southern States La down Yard for
Southern States Chemical, Inc.
PROJECT NO: 40132.00.WL
We are sending via: ❑ Overnight ❑ Regular Mail ❑ Pick-up ® Hand Delivered
The following items. ❑ Correspondence ® Plans ❑ Specifications ❑ Other as listed below:
COPIES
DATE
NO.
DESCRIPTION
2
Revised Stormwater Permit Application, Wet Detention Supplement,
Drainage Narrative, Stormwater Calculations
2
Revised CO.O/Cover Sheet, SV1.11Existing Conditions, C1.1/Notes and
Legend, C2.1/Demolition Plan, C3.1/Site Layout Plan, C4.11Grading,
Drainage, Erosion Control, C4.2/Drainage Area Plan,
C5.11Miscellaneous Details, C5.2/Miscellaneous Details
1
WKD Response Letter
THESE ARE TRANSMITTED as checked below:
❑ For Approval ❑ As Requested ❑ Approved as Submitted ❑ Returned for Corrections
❑ For Your Use ® For Review and Comment ❑ Approved as Noted ❑ Forward to Subcontractor
REMARKS:
COPY TO: File, Stephen Dees SIGNED_ (L& Lbs�=
Carrie H. Bollenbacher, PE

fWK
DICKSON
community infrastructure consultants
June 30, 2004
Ms. Laurie Munn
NCDENR — Division of Water Quality
127 Cardinal Drive Extension
Wilmington, North Carolina 28405
RE: Southern States Chemical Company
Permit Number GP 31-04
WKD Project Number 40132.00.WL
Dear Ms. Munn:
Following are responses to comments from you in your letter of June 24, 2004, to Stephen Dees with
Southern States Chemical. All responses are prepared in bold text.
Comment:
1. Please complete Section VI of the application. The application has been returned to the
engineer for completion.
Response: Section VI of the application has been revised and enclosed.
Comment:
2. Please label and dimension the permanent pool contour on the wet detention pond drawing.
Response: Permanent pool contour has been labeled and dimensioned on site layout sheet (see
Sheet C3.1).
Comment:
3. Please specify the wetland species to be planted on the 6:1 shelf.
Response: Wetland species for 6:1 shelf specified on pond cross section (see Sheet C5).
Comment:
4_ The forebay should be 20% of the entire volume at the permanent pool (the main pond plus
the forebay). The forebay is too small for the current design.
Response: Volumes for the forebay have been revised to match those of the drawings. There
was an error in the excel spreadsheet that was previously submitted with the drainage
calculations (revised drainage calculations enclosed for your review).
909 Market Street
Wilmington, NC 28401
Tel. 910, 762.4200
Fax [phone]
www.wkdickson.com
North Carolina • South Carolina • Georgia • Florida

Ms. Laurie Munn
June 30, 2004
Page 2
Comment:
5. The application must be signed by a principal executive officer of at least the level of the
vice-president or his authorized representative. Mr. Dees may act as an authorized
representative if the principal executive officer submits a letter or authorization.
Response: Copy of letter of authorization enclosed as requested. Original has been mailed to
DWQ office.
If you have additional questions or need further clarifications, please let us know.
Sincerely,
W. K. Dickson & Co., Inc.
Carrie H. Bollenbacher, P.E.
/pb
Enclosure

Jun 25 04 03:11Fi Southern States Chemical ale-e32-It03 p.2
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North Carolina Division OfWater Quality
Wilming,on ltcbional Office
127 Cardinal Drive t{xter>tion
WilminLKon' NC
To Wh(un it may "meern:
June 25, 2004
P
Sulij*t- SWrmwatcr Projcrt No. SWE 040604
Southern States Lavdown Yard
New Harmer County
Your recent response dated -June 24, 2004 to our Stormwacur Management Permit
Appliewion indicated thus the application must be signed by a prircipal cxecutivc
ul'licer or an authoh7xd representa live.
For puM)1,,-:s of this application submittal_ Mr. Stephens Dcvs has appropriate
uuthonzation to sign on bchulf of Soothcm States Chemical, Inc:
YUur~ truly,
Kcy L?, Compton
President
I T
Key 0. Compton,
A •nsl3ant
P,Q aoA 5�Q}
Savhnnen, GA 31402
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j JUN 2 5 2004
o -:
RF,CEIVED
Mr. Stephen Dees
Southern States Chemical, Inc.
2600 US Hwy 421 N
Wilmington, NC 2S401
Dear Mr. Dees:
Michael F. Easley, Governor
William G. Ross Jr., Secretary
Nora Carolina Department of Environment and Natural Resources
Alan W. Ktimek, P.E.Arector
Division of Water Quality
Coleen H. Sullins, Deputy Director
Division of Water Quality
June 24, 2004
Subject: REQUEST FOR ADDITIONAL INFOR\ZaTION
Stormwater Project No. SW8 040609
Southern States Laydoa.,n Yard
New Hanover County
The Wilmington Regional Office received a Stormwater Management Perrrut Application for
Southern States Laydo«-n Yard on June 17, 2004. A preliminary review of that information has
determined that the application is not complete. The following information is needed to continue the
stormwater reN2e%%,:
Please complete Section VI of the application. The application has been returned to the
engineer for completion.
2. Please label and dimension the permanent pool contour on .the wet detention pond
dra%N7nc,
3. Please specif}, the wetland species to be planted on the 6:1 shelf.
:. The forebay should be 20% of the entire Volume at the permanent pool (the main pond
plus the forebay). The forebay is too small for the current design.
5. The application must be signed by a principal executive officer of at least the level of the
rice -president or his authorized representative. Mr. Dees may act as an authorized
representative if the principal executive officer submits a letter or authorization.
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 1, 2004, or the application will
be returred as incomplete. The return of a project Nvill 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.
- FwA
N. C. Division of Water Quality 127 Cardinal Drive Extension [phone] Customer Service *u
Wilmington Regional Office Wilmington, NC 28405 [phone] Fax [phone] am

Mr. Stephen Dees
Paze 2
June 24.2004
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 project 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,
Laurie Munn
Environmental Engineer
RSS/:Ism S:\N�'QSISTORMWATIADDINIFO120041040609 jun04.doc
cc: Laurie Munn
Carrie Bollenbacher, P.E.

►/
- ,14 -
r

Michael F. Easley, Governor
William G. Ross Jr., Secretary
North Carolina Department of Environment and Natural Resources
Alan W. Klimek. P.E.,Director
Division of Water Quality
Coleen H. Sullins, Deputy Director
Division of Water Quality
June 24.2004
Mr. Stephen Dees
Southern States Chemical, Inc.
2600 US Hwy 421 N
Wilmington, NC 25401
Subject: REQUEST FOR ADDITIONAL Ili TFORNLATION
Storm%vater Project No. SW8 040609
Southern States Laydown Yard
New Hanover County
Dear Mr. Dees:
The Wilmington Regional Office received a Stormwater Management Permit Application for
Southern States Lavdo«-n Yard on June 17, 2004. A preliminary review of that information has
determined that the application is not complete. The follwAring information is needed to continue the
stormwater review:
Please complete Section VI of the application. The application has been returned to the
engineer for completion.
2. Please label and dimension the permanent pool contour on the wet detention pond
dray.-ing.
�. Please specify the wetland species to be planted on the 6:1 shelf.
�. The forebay should be 20% of the entire volume at the permanent pool (the main pond
plus the forebay). The forebay is too small for the current design.
5. The application must be signed by a principal executive officer of at least the level of the
rice -president or his authorized representative. Mr. Dees may act as an authorized
representative if the principal executive officer submits a letter or authorization.
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 1, 2004, or the application Nvill
be returned as incomplete. The return of a project Nvill 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.
N. C. Division of Water Quality 127 Cardinal Drive Extension [phone] Customer Service A&A
Wilmington Regional Offsce Wilmington, NC 28405 [phone] Fax [phone] hl�'i7ENR

Nor. Stephen Dees
Pasze 2
June 24, 2004
The construction of any impervious surfaces, other than a construction entrance under an
approved Sedimentation Erosion Control Plan, is a Niolation of NCGS 143-215.1 and is- subject to
enforcement action pursuant to NCGS 143-215.6A.
Please reference the State assigned project number on all correspondence. Any original
documents that need to be re,6sed 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,
CVQ'k�-U%��
Laurie Munn
Environmental Engineer
RSS/:lsm S:1WQSISTORMWATIADDINFO12004\040609 jun04.doc
cc: Laurie Munn
Carrie Bollenbacher, P.E.

Please indicate that you have prodded the following required information by initialing in the space provided
next to each item.
Initials
• Original and one copy of the Stormwater Management Permit Application Form
• One copy of the applicable Supplement Form(s) for each BMP
• Permit application processing fee of S420 (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 stormwater control measures
- Wetlands delineated, or a note on plans that none exist -
- Existing drainage (including off -site), drainage easements, pipe sizes, runoff calculations
- Drainage areas delineated
- Vegetated buffers (where required)
«. AGENT AUTHORIZATION
If you wish to designate authority to another individual or firm so that they may provide information on your
behalf, please complete this section.
Designated agent (indivdual or firm): WK Dickson & Co.. Inc.
Mailing Address: 909 Market Street
City Wilmington State:
Phone: ( 910 ) 762-1200
NTII. APPLICANT'S CERTIFICATION
NC
Zip: 28401
Fax: [phone]
1, (print or n pe name of person listed in General Information, Item ?) Stephen Dees
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 v611 be recorded, and that the proposed project complies with the requirements of 15A
NCAC 2H.1000.
Signature:
Date:i f Z10D L{
Form S'WU-101 Version 3.99 Paae 4 of 4

State of North Carolina
Department of Environment and Natural Resources
Wilmington Regional Office
Michael F. Easley, Governor William G. Ross Jr., Secretary
1.te: 10q
FAX
FAX COVER SHEET
No. Of Pages: V
From: L ,a.1
CO:
FAX#: [phone]
127 Cardinal Drive Extension, Wilmington, N.C. 28405-3945 Telephone [phone] Fax [phone]
An Equal Opportunity Affirmative Action Employer

Stormwater Narrative
Southern States Laydown Yard
WKD#: 40132.00.WL
June 14, 2004
GENERAL
Southern States Chemical, Inc. plans to develop the property commercially with a laydown
yard. The site is located at the westerly portion of Southern States Chemical, Inc. property
at 2600 US Highway 421 North, which is approximately 2.4 miles north of the intersection
of US Highway 117 and US Highway 421 North. The site is moderately flat and drains by
means of sheet flow to an existing ditch that borders the proposed disturbed area both
north and east. The existing ditch drains to an existing pond located in the southeast corner
of the proposed disturbed area.
PROPOSED IMPROVEMENTS
Proposed improvements will involve the construction of a 6.52 acre laydown yard and will
include the construction of a wet detention basin. This basin will improve water quality for
post development runoff as well as ensure that our post -development flow (14.90 cfs) is less
that that our pre -development flow (16.71 cfs) for the 25-year event. All of the surface
water runoff from the developed areas will be sent to a proposed wet detention system.
Wetland impacts have been minimized with the road crossing and COE permits obtained.
The surface treatment of the laydown yard will be aggregate material.
DRAINAGE CONSIDERATIONS
Runoff will be conveyed to the detention system by means of a swale that runs along the
south and east boundaries of the laydown yard. This swale will ensure positive drainage to
the pond. The Swale system will be designed to transport the runoff from the 25-year storm
event to the pond. The grades shown on the plans are final grade elevations. The plan
currently proposed shows that the imperviousness of the drainage area being conveyed to
the pond will be approximately 79%. During construction silt fence, riprap apron,
sediment trap (proposed pond), and construction entrance will be place in critical areas as
directed by the Drainage Plan. All design criteria is based on. New Hanover County
stormwater standards.
Drainage areas were delineated for determining the correct swale / culvert size for each
drainage segment. Manning's equation was used to determine normal depth of flow in the
channels.
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STORMWATER RUNOFF
CALCULATIONS
PREPARED FOR
SOUTHERN STATES CHEMICAL, INC.
2600 US HWY 421 NORTH
Wilmington, NC 28401
June 14, 2004
a =h 77 'Sou#hern'S:ta#es Laydown Yard s, F
. _ _ h
x
,Wilmington, North&Carolina
n
4�
OF �S5��ti�y'
02931 t
W.K. Dickson & Co., Inc.
909 Market Street
Wilmington, NC 28401
Phone [phone]
Fax [phone]
WKD No. 40132.00.WL

WK DICKSON
Engineering 909 Nfarket Street
Land Planning Wilmington, NC 28401
Surveying [phone]
SOUTHERN STATES LAYDOWN YARD
TOTAL AREA DRAINING TO POND = 357,110 SF = 8.20 AC
TOTAL PRE -DEVELOPMENT FLOW =(C)(I25-YR)(A)=(0.25)(8.15)(8.20) = 16.71 CFS
PRE -DEVELOPMENT PEAK FLOW RATE FOR 25-YR RETURN PERIOD:
Q = 16.71 CFS
TOTAL PROPOSED IMPERVIOUS SURFACE AREA DRAINING TO POND:
GRAVEL AREAS = 283,409 SF
= 283,409 SF
PERCENT IMPERVIOUS DRAINAGE AREA FOR POND:
= (283,409 SF / 357,110 SF) x 100
= 79.4 %
REQUIRED STORAGE FOR 1-INCH OF RUNOFF FOR POND: (use Schueler Method)
= 0.05 + 0.009 (I)
= 0.05 + 0.009(79.4) = 0.766
= (1")(0,766)(1/12)(357,110)
22,807 CF (24,221 CF PROVIDED)
POND DEPTH SA/DA %
(FT)
4.0 6.94
POND SURFACE AREA (MIN.)
(SF)
IF POND DEPTH = 4.0 FT, MINIMUM SURFACE AREA = 24,783 SF
USED 90% TSS CHART TO SIZE POND
AREA @ ELEVATION 4.30 = 33,192 SF > 24,783 SF
24,783
REQUIRED STORAGE FOR FOREBAY: 20% OF TOTAL PERMANENT POOL VOLUME
= (0.2)(81,901 CF) .
16,380 CF (15,597 CF PROVIDED)
PROJECT: S. STATES LAYDOWN YARD SUBJECT: POND CALCULATIONS JOB NO.: 40132.00.WL
PREPARED BY: CHB DATE: 6/14/04 CHECKED BY: MNH DATE: PAGE NO OF

WK DICKSON
Engineering
Land Planning
Surveying
909 Market Street
Wilmington, NC 28401
[phone]
Pond Volume
Contour
Incremental
Cumulative
Elevation Area
Volume
Volume
(ft) (sf)
(cf)
(cf)
Bottom Elevation ` : =: Q:3 : ` = " 15823'
0
0
T. -' 17124.
11532
11532
2 s.. .,- 719044.
18084
29616
3 "_µ `.:: 21783
20414
50029
25978
23881
73910
Permanent Pool
7992
81901
Forebay Volume
Contour
Incremental
Cumulative
Elevation Area
Volume
Volume
(ft) (sf)
(cf)
(cf)
Bottom Elevation 0.3: ;: - _ , 2652.. '. `
0
0
1: ';! ,285.5,
1928
1928
3217
5144
43J74•-:.
3976
9120
r' !4 <.:. ,' S24>>'
4808
- 13928
Permanent.Pooi 4':3: .;5$92,
1670
15597
Forebay Volume is
19.0%
of Pond Volume
PROJECT: S. STATES LAYDOWN YARD SUBJECT: POND CALCULATIONS JOB NO.: 40132.00.WL
PREPARED BY: CHB DATE- 6114104 CHECKED BY: MNH DATE: PAGE NO OF

WK DICKSON
Engineering 909 Market Street
Land Planning Wilmington, NC 28401
Surveying [phone]
POND RELEASE
TIME FOR CONTROL PIPE: POND
ELEV.
EFF. STORAGE
VOL. RELEASED
OUTFLOW RATE
RELEASE TIME
(FT)
(CF)
(CF)
(CFS)
(HOURS)
5.00
24,221
3552
0.088
11.2.
4.90
20,669
3527
0.081
12.0
4.80
17,142
6973
0.074
26.1
4.60
10,169
10169
0.058
49.1
4.30
0
TOTAL HOURS
98..4
DAYS
f 4.1
CONTROL PIPE:
2
INCH ORIFICE BOLES
USED ORIFICE EQUATION TO DETERMINE
OUTFLOW RATE
Q = Cd"A`(2gh)"1/2
PROJECT: S. STATES LAYDOWN YARD SUBJECT: POND CALCULATIONS JOB NO.: 40132.00.WL
PREPARED BY: CHB DATE. 6/14/04 CHECKED BY: MNH DATE: PAGE NO OF

P
LETTER OF TRANSMITTAL k6l;
community Infrastructure consultants
909 Market Street Wilmington, North Carolina 28401
TO: NCDENR
Division of Water Quality
Attn: Laurie Munn
910.762.4200 tel. [phone] fax
DATE: 6/16/04
RE: Southern States Laydown Yard for
Southern States Chemical, Inc.
PROJECT NO: 40132,00.WL
We are sending via: ❑ Overnight ❑ Regular Mail ❑ Pick-up ® Hand Delivered
The following items: ❑ Correspondence ® Plans ❑ Specifications ❑ Other as listed below:
COPIES
DATE
NO.
DESCRIPTION
2
Stormwater Permit Application, Wet Detention Supplement, Drainage
Narrative, Stormwater Calculations
2
C0.0/Cover Sheet, SV1.1/Existing Conditions, C1.1/Notes and Legend,
C2.1/Demolition Plan, C3.1/Site Layout Plan, C4.1/Grading, Drainage,
Erosion Control, C4.2/Drainage Area Plan, C5.1/Miscellaneous
Details, C5.2/Miscellaneous Details
1
$4000.00 application fee
THESE ARE TRANSMITTED as checked below:
❑ For Approval ❑ As Requested ❑ Approved as Submitted ❑ Returned for Corrections
❑ For Your Use ® For Review and Comment ❑ Approved as Noted ❑ Forward to Subcontractor
REMARKS:
COPY TO: File. Stephen Dees
SIGNED: C_ 1 ' f36
Carrie H. Bollenbacher, PE

.05/06/2004 13:11 9107624201 WK DICKSON FAGS 81/03
S�1 O 7
1wMWKSIMILE DICKSON
community infrasiructure consultants
909 Market Street Wilmington, North Carolina 28401 910.762.4200 tel. 910.762,4201 fax
DATE: (,
AFFILIATION: VW Q- _
FAX NO: -350 ^ tDo
MESSAGE:
l( C
FROM: ofta-te T�D"-;et�
W.K. Dickson & Co., Inc.
910.762.4200 tel.
910.761.4201 fax
Number of pages including cover sheet:

05/06/2004 13:11 9107624201 WK DICKSON PAGE 02/03
PROJECT NARRATIVE FOR
SOUTHERN STATES LAYDOWN YARD
(40132.00.WL)
GENERAL INFORMATION
Owner: Southern States Chemical Inc.
2600 Highway 421 North
Wilmington, NC 28401
ATTN: Stephen Dees
Design Engineer: Carrie H. Bollenbacher, PE
do W.K. Dickson & Co., Inc. ,
909 Market Street
Wilmington, NC 28401
Applicable Fast -Track Permits: Stormwater
EXISTING IMPROVEMENTS
The project site is located at 2600 Highway 421 North in New Hanover County.
The topography of the existing site shows mild to moderate slopes currently
draining by sheet flow to the existing ditch that borders proposed disturbed area of
the site both north and east. The existing ditch drains to an existing pond located in
the southeast corner of the proposed disturbed area.
PROPOSED IMPROVEMENTS
The proposed disturbed acreage totals approximately 9.8 acres of the west portion
of the Southern States property. Proposed improvements will include the
construction of an 8.5 acre laydown yard. No underground utilities are necessary
to serve this development. This development will also include the construction of a
wet detention basin to provide detention and improvement of water quality for post
development runoff. This wet detention basin has been appropriately designed for
90% TSS removal and for storage and release of the first inch of runoff. Runoff to
the detention system will be conveyed by means of a swale that runs along the
south and east boundaries of the laydown yard. This Swale will ensure positive
drainage to the pond. All design criteria is based on New Hanover County
stormwater and erosion control standards.

05/06/2004 13:11 9107624291 WK DICKSON
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