SW7080503_CURRENT PERMIT_20080529

STORMWATER DIVISION CODING SHEET
POST -CONSTRUCTION PERMITS
PERMIT NO.
Sw
DOC TYPE
CURRENT PERMIT
El APPROVED PLANS
El HISTORICAL FILE
El COMPLIANCE EVALUATION INSPECTION
DOC DATE
YYYYMMDD

wa:Ko
Michael F. Easley, Governor
Williarn G. Ross Jr., Secretary
North Carolina Department of Environment and Natural Resources
Coleen H. Sullins, Director
Division of Water Quality
May 29, 2008
Pasquotank County
Aftn.: Randy Keaton
P.O. BOX 56
Elizabeth City, NC 27909
Subject: Stormwater Review SW7080503
Reverse Osmosis Water Treatment —Phase 11
High Density Permit
Pasquotank County
Dear Mr. Keaton:
The Washington Regional Office received a complete Stormwater Management Permit Application for the subject
project on May 05, 2007. Staff review of the plans and specifications has determined that the project, as
proposed, will comply with the Stormwater Regulations set forth in Title 15A NCAC 2H.1000. We are forwarding
Permit No. SW70080503 dated May 29, 2008 for the construction of the subject project.
This permit shall be effective from the date of issuance until May 29,2018 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, 6714 Mail Service Center, Raleigh, NC 27699-6714. Unless such
demands arb made this permit shall be final and binding.
If you have any questions, or need additional information concerning this matter, please contact Ernest Odei-
Larbi, or me at [phone].
cerl,
oJ
Regional Supervisor�
Surface Water Protection Section
AH/eol: J:\WPDATA\WQS\ State SW-EOL\Permits — Wet pond\2008
cc: David T. UpChurch- Hobbs, Upchurch & Associates, P.A (300 S.W Broad Street, Southern Pines, NC 28387)
Ppquotank County Planning/inspection
t.)4ashington Regional Office
Central File
North Carolina Division of Water Quality Internet: �vwncwaterqualirv.org
943 Washington Square Mali Phone [phone]
Washington, NC 27889 Fax [phone]
One
NorthCarolina
Natimally
An Equal Opportunity/Affirmative Action Employer — 50% Recycled/l 0% Post Consumer Paper

State Stormwater Management Systems
Permit No. SW708050i
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
Pasquotank 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 May 29, 2018 and shall be subject to the following
specified conditions and limitations:
1. 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 1.6 on page 3 of this permit. The stormwater control has been designed to handle the runoff from
80,000 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.
kA

State Stormwater Management Systems
Permit No. SW7080503
6. The following design criteria have been provided in the wet detention pond and must be maintained at
design condition:
Total Impervious Surfaces, ft: 80,000 (designed for 85,560)
Design Storm, inches: 1.5
Receiving §tream: Little River
Classification of Water Body: C; SW
Total Site Area: 4.14 ac
Drainage area: 4.14 ac
Total Impervious allowed on site: 80,000 sf
TSS removal efficiency: 90%
Wet Pond Ave. Depth: 3.04 ft
Required Storage Volume: 47.083 cf
Provided Storage Volume: 47,083 cf
Required Surface Area: 5,484.86 sf
Provided Surface Area:
15,463 sf
Permanent Pool Volume:
47,083 cf
Permitted Forebay Volume:
10,414 cf
Controlling Orifice:
2 inch
Permanent Pool Elevation, FMSL
Temporary Storage Elevation
6.0 ft. MSL
3

State Stormwater Management Systems,
Permit No. SW7080503
11. SCHEDULE OF COMPLIANCE
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.
The permittee shall at all times provide the operation and maintenance necessary to assure the permitted
stormwater system functions at optimum efficiency. The approved Operation and Maintenance Plan must
be followed in its entirety and maintenance must occur at the scheduled intervals including, but not limited
to:
a. Semiannual scheduled inspections (every 6 months).
b. Sediment removal.
C. Mowing and revegetation of slopes and the vegetated filter.
d. Immediate repair of eroded areas.
e. Maintenance of all slopes in accordance with approved plans and specifications.
f. Debris removal and unclogging of outlet structure, orifice device, flow spreader, catch basins and
piping.
9. 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 DWO. The records will indicate the date, activity, name of person performing the work and what
actions were taken.
5. 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 pond is 1/6 HP 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.
8. If the stormwater system was used as an Erosion Control device, it must be restored to design condition
prior to operation as a stormwater treatment device, and prior to occupancy of the facility.
9. Access to the stormwater facilities shall be maintained via appropriate easements at all times.
% 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:

State Stormwater Management Systems
Permit No. SVV7080503
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 Pernnittee at all times.
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.
Ill. GENERAL CONDITIONS
1 . This permit is not transferable except after notice to and approval by the Director. In the event of a
change of ownership, or a name change, the permittee must submit a formal permit transfer request to
the Division of Water Quality, accompanied by a completed name/ownership change form, documentation
from the pates involved, and other supporting materials as may be appropriate. The approval of this
request will be considered on its merits and may or may not be approved. The permittee is responsible for
compliance with all permit conditions until such time as the Division approves the transfer request.
2. Failure to abide by the conditions and limitations contained in this permit may subject the Permittee to
enforcement action by the Division of Water Quality, in accordance with North Carolina General Statute
143-215.6A to 143-215.6C.
3. The issuance of this permit does not preclude the Permittee from complying with any and all statutes,
rules, regulations, or ordinances, which may be imposed by other government agencies (local, state, and
federal) having jurisdiction.
4. In the event that the facilities fail to perform satisfactorily, including the creation of nuisance conditions,
the Permittee shall take immediate corrective action, including those as may be required by this Division,
such as the construction of additional or replacement stormwater management systems.
5. The permittee grants DENR Staff permission to enter the property during normal business hours for the
purpose of inspecting all components of the permitted stormwater management facility.
6. The permit may be modified, revoked and reissued or terminated for cause. -The filing of a request for a
permit modification, revocation and reissuance or termination does not stay any permit condition.
7. Unless specified elsewhere, permanent seeding requirements for the stormwater control must follow the
guidelines established in the North Carolina Erosion and Sediment Control Planning and Design Manual.
8. Approved plans and specifications for this project are incorporated by reference and are enforceable
parts of the permit.
9. The permittee shall notify the Division any name, ownership or mailing address changes within 30 days.

State Stormwater Management Systems,
I Permit No. SW7080503
10. This permit shall be effective from the date of issuance until. Application for permit renewal shall be
submifted 180 days prior to the expiration date of this permit and must be accompanied by the
processing fee.
Permit issued this the 29th day of May 2008,
NORTH CAROLINA ENVIRONMENTAL MANAGEMENT COMMISSION
fflrColeen H. Sullins, Director
Division of Water Quality
By Authority of the Environmental Management Commission
Permit Number SW7080503

State Stormwater Management Systems
Permit No. SW7080503
Reverse Osmosis Water Treatment —Phase 11
Pasquotank County
Designer's Certification
1. , 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:
SEAL
Signature
Registration Number
Date

State Stormwater Management Systems
Permit No. SW7080503
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.
11. 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
Pasquotank County Building Inspections

==-- -- , - -- DWQ USE ONLY
Date Received
Fee Paid
Permit Number
MAY 2 b Z U U 0
V05
4VO90509
UlPf"'AIVAR0
44
Department of Environment and Natural Resources
State of North Carolina
Division of Water Quality
STORMWATER MANAGEMENT PERMIT APPLICATION FORM
Thisforin inay be photocopiedfor use as an original
1. GENERAL INFORMATION
I . Applicants name (specify the name of the corporation, individual, etc. who owns the project):
Pasquotank Count3�
2. PrintOwner/Signing Official's name and title (person legally responsible for facility and compliance):
Randy Keaton -County Manager
3. Mailing Address for person listed in item 2 above:
P.O. Box 56
City:Elizabeth Ci!�� - State:NC Zip:27909
Phone: [phone] Fax: [phone]
Email:
4. Project Name (subdivision, facility, or establishment name - should be consistent with project name on plans,
specifications, letters, operation and maintenance agreements, etc.):
Pasquotank County
Reverse Osmosis Water Treatment Plans -Phase 11
5. Location of Project (street address):
1,000 LF West along SRI 144 from intersection of SRI 140, SR-1144, and SR1303
City:Elizabeth City County:Pasquotank
6. Directions to project (from nearest major intersection):
1,000 LF West along SRI 144 from intersection of SRI 140, SRI 144, and SR1303
7. LatitUde:36 Degrees 16' 15" Longitude:76 Degrees 22' 08" of project
8. Contact person who can answer questions about the project:
Nanie:lanies D. Freeman Telephone Number: (910 ) 692-5616
l�-'rii�iil:[e-mail]
Il. PERMIT INFORMATION:
1 . Specify whether project is (check one):
ZNew
DRenewal E]Modification
Fonn SWU-101 Version 8.07
Page I ol'4

2. If this application is being submitted as the result of a renewal or modification to all existing permit, list the
existing permit number and its issue (late (if known)
3. Specify the type of project (check one):
F_]Low Density ZHigh Density E]Redevelop E]General Permit DUniversal SMP DOther
4. Additional Project Requirements (check applicable blanks):
F_1CAMA Major NSedimentation/ Erosion Control []404/401 Permit E:1NPDES Stormwater
Information on required state permits can be obtained by contacting the Customer Service Center at
1-877-623-6748.
Ill. 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 for this project will be treated via a wet pond designed in accordance with the current DW
standards. All runoff from the developed area will be routed in to the pond's forebay. The pond is designed for
the ultimate build out of impervious surfaces.
2. Stormwater runoff from this project drains to the Pasquotank River basin.
3. Total Site Area: 4.14 acres 4. Total Wetlands Area: 0 acres
5. 100' Wide Strip of Wetland Area: N/A acres (not applicable if 110 Wetlands exist on site)
6. Total Project Area**:4.14 acres 7. Project Built Upon Area:48 %
8. How many drainage areas does the project have?l
9. Complete the following information for each drainage area. If there are more than two drainage areas in the
project, attach all additional sheet with the information for each area provided in the same format as below.
Basin Information
Drainage Area I
Drainage Area 2
Receiving Stream Name
Little River
Stream Class & Index No.
QSW - 30-5-(])
Drainage Area (so
203,700
Existing Impervious* Area (so
0
Proposed Inipervious*Area (so
80,000
% Impervious* Area (total)
40
Impervious* Surface Area
Drainage Area I
Drainage Area 2
On -site Buildings (so
16,000
Oil -site Streets (so
0
Cn-sitc Parking (sl)
36,500
On -site Sidewalks (so
0
Other on -site (sO
27,500
Off -site (so
0
Total (so:
80,000
Forni SWU-101 Version 8.07 Page 2 of 4

Impervious area is defined as the built upon area including, but not limited to, buildings, roads, parking areas,
sidewalks, gravel areas, etc.
**Total project area shall be calculated based on the current policy regarding inclusion of wetlands in the built upon area
percentage calculation.
10. How was the off -site impervious area listed above
IV. DEED RESTRICTIONS AND PROTECTIVE COVENANTS
One of the following 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.
Form DRPC-1
High Density Commercial Subdivisions
Form DRPC-2
High Density Developments with Outparcels
Form DRPC-3
High Density Residential Subdivisions
Form DRPC4
Low Density Commercial Subdivisions
Form DRPC-5
Low Density Residential Subdivisions
Form DRPC-6
Low Density Residential Subdivisions with Curb Outlets
By your signature below, you certify that the recorded deed restrictions and protective covenants for this
project shall include all the applicable items required in the above form, that the covenants will be binding
on all parties and persons claiming under them, that they will run with the land, that the required covenants
cannot be changed or deleted without concurrence from the State, and that they will be recorded prior to the
sale of any lot.
V. SUPPLEMENT FORMS
The applicable state stormwater management permit supplement form(s) listed below must be submitted for each
BMP specified for this project. Contact the Stormwater and General Permits Unit at [phone] for the status
and availability of these forms.
Form SW401 -Low Density
Form SW401-Curb Outlet System
Form SW401-Off-Site System
Form SW401-Wet Detention Basin
Form SW401-Infiltration Basin
Form SW401-Infiltration Trench
Form SW401-Bioretention Cell
Form SW401-Level Spreader
Form SW401-Wetland
Form SW401 -Grassed Swale
Form SW401-Sand Filter
Low Density Supplement
Curb Outlet System Supplement
Off -Site System Supplement
Wet Detention Basin Supplement
Infiltration Basin Supplement
Underground Infiltration Trench Supplement
Bioretention Cell Supplement
Level Spreader/Filber Strip/Restored Riparian Buffer Supplement
Constructed Welland Supplement
Grassed Swale Supplement
Sand Filter Supplement
Fonn SWU-101 Version 8.07 Page 3 of 4

vi. SUBMITTAL REQUIREMENTS
Only complete application packages will be accepted and reviewed by the Division of Water Quality (DWQ).
A complete package includes all of the items listed below. The complete application package should be
submitted to the appropriate DWQ Office. (Appropriate office may be found by locating project on the
interactive online map at http://h2o.enr.state.ne.us/su/msi maps.ht )
1 Please indicate that you have provided 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
-IMF
• Original and one copy of the Deed Restrictions & Protective Covenants Form
_�> 0 F
• Original of the applicable Supplement Form(s) d O&M agreement(s) for each BMP
• Permit application processing fee of $505 ($4,000 for Express) payable to NCDENR
• Calculations & detailed narrative description of stormwater treatment/ management
• Copy of any applicable soil report
• Three copies of plans and specifications (sealed, signed & dated), 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)
VII. AGENT AUTHORIZATION
If you wish to designate authority to another individual or firm so that they may provide information on your
behalf, please complete this section.
Designated agent (individual or firm):Hobbs, Upchurch & Associates, P.A.
Mailing Address:P.0 Box 1737
City:Southern Pines State:NC Zip:28388
Phone: [phone] Fax: [phone]
Email: iFreeman@hobbsupghurch..com
VIII. APPLICANT'S CERTIFICATION
1, (print or type name of person listed in General Information, item 2) Randy Keaton
certify that the information included on this permit application form is, to the best of my knowledge, correct and
that the project will be constructed in conformance with the approved plans, that the required deed restrictions
and protective covenants will be recorded, and that the proposed project complies with the requirements of 15A
NCAC 2H.1000.
Signature: Date: C112- 7 A 12
Form SWU-101 Version 8.07 Page 4 of 4

Penh No.!�N 7o so 50 3
(b i5e pr�lded by DWQ)
,I WA rp.�q
—Alr;h
NCDM
STORMWATER MANAGEMENT PERMIT APPLICATION FORM
401 CERTIFICATION APPLICATION FORM
WET DETENTION BASIN SUPPLEMENT
Ths form must be filledout,
pantract andsu5mlW
The Requnaxf Items CheaWl (Pal must bepninted, Medout andsubmittedalong wiO all of the requiredinbornalm
If. PROJECT INFORMATION'
Protect name
Pasquotank County Water Plant
Contact person
Jeff Thornlason (Hobbs, Upchurch & Associates)
Phone murnber
910-270-5520
Date
10111007
DraimeW am numi*r
1 of 1
111. DESIGN INFORMATION
Site Charwtensbcs
Dminagearea
180,134
ft'
Impervious area
85,560
f?
% impervious
47,49797373
% R EIE C V El- D.
Design rainfall depth
15
in
SteMeVolume: Nan-SRWaters
MAY - 5 2008
Mnimunn volume requared
11,70B
ft'
Volume pruMed
18,087
ft'
StorW Volume. SRWaters
D%A1Q-WAR0
1-yr, 2"r runoff depth
WA
in
Pre,development 1-yr, 24-hr nmoff
NIA
03
Post -development 1-yi, 24-hr runoff
WA
a,
Mnimum volume required
#VALUE1
ft'
Volume provided
WA
ft�
Pod Flow Calculations
Is prelpost control of the 1-yr 24-hr peak law
required?. y (Y or N)
I-yT, 24-hr rainlal depth
2.3
in
Rational C. pre developmem
0.5
(unitless)
Rational C, pod�davelopment
0.7
(unitless)
Rainfall intensirlif. I-yr, 24-hr storm
4.6
HVhF
Pre-duvelopment 1-yr, 24-hr peak flow
13.0
fil/sec
Post-davelopmend 1-yr, 24-hr peak Dow
H
f0tsec
PrePost 1-yr, 24-hr peak How control
75--o),a,
Basin Elevations
Basin bottom elevabon
Ho
ft
Sediment cleanout elevation
100
ft
Permanent pool elevation
6,00
ft
Temporary pool elevation
7,00
ft
Volume and Surface Area Calculations
SAIDA ratio
56D
unitless)
Permanent pool, surface area recluged
10,087
to
Permanertt pool, surface arm prowled
15,463
ft? OK
Permanent pool volume
47,083
fir
Average depth for SAIDA Wes
304488133
ft OK
Forebay volume
10,04
ft 3
Forebay % of permanent pool volume
22
% Must be approx. 20%, Adjust pond dimensions
Temporary pool. surface was provicied
19,767
ft,
�rn 9VW1 -VM Dsterftn leasi�Rev, 2
�ns 1. & 11. Design Surnrnary, Page 1 d 3

Penh No.—
fto be pmwdd by DWO)
111. DESIGN INFORMATION
Drffwdmn Calculations
Treatment volume drawdawn lime 3.3 der OK
Treatment volume dsdwge rate
0.10 Ols
Pre -development I -yr, 24-hr discharge
13,00 01/s
OK
Past-clevelolarrient 1-yr, 24-hr discharge
0,00 ftIs
OK
Additional khrrmation
Diameter of orifice
2.00 in
DesW TSS removal
90 %
Basin skle slopes
3 1
OK
Vegetated shelf dope
10 1
OK
Vegetated shelf width
10 R
OK
LffKjth of ftypath to width rate
5.97 1
OK
Length to width ratio
2.67 1
OK
Trash rack for overflaw & ofifim?
y (Y or M
OK
Freeboand provided
I ft
OK
Vegetated tiler provided?
n (Y or N)
Design must be based on 90% TSS removal
Recorded damage easement prowled?
y (Y or M
OK
Capures all ninciff at uttimate buiWaid?
y (Y or M
OK
Drain medwism for maintenance a emergencies
limited
ffVALUEI
F� SVV401-VM D� Sssin-R..2 Parts 1, & I. Design Su�ry, P2ge 2 013

Perrit
Jill. REQUIRED FEMS CHECKLIST
(to be providiod by D10M)
Please mclicate the page or plan sheel numbers where the supporting documentation can be found. An incomplete submittal package will
result in a request for additional Wormation. This vivill delay fined review and approval of the project. Initial in the space provided to
indicate the following design requirements have been met If the applicant has designated an agent, the agent may initial below. If a
requirement has not been met attatch justification.
Pagel Plan
Initials
Shed'No.
L YEi —(0
1. Pam (1- - 50' or larger) of the enfire site showing:
Design at ultimate build -out,
Off-sde drainage (if applicable),
Delineated drainage basins (include Rational C coefficient per basin),
Basin dimensions,
Pretreatment system,
High flow bypass system,
Maintenance access,
Recorded drainage easement and public right of way (ROW),
Overflow device, and
Bainclanes of drainage easement
2. Partial plan (V = 30- or larger) and details for the wet detention basin showing:
- Outlet structure with trash rack or similar,
- Maintenance access,
- Permanent pool dimensions,
- Forebay and main pondwith hardened emergency spillway,
- Basin cross-section,
- Vegetation specification for pladng shelf, and
PWTC
"er "
3- Section view of the dry detention basin (1 20' or larger) showing:
- Side slopes, 3:1 or lower,
- Pretreatment and treatment areas, and
- Inlet and outlet stuctures.
4. If the basin is used for sediment and erosion control during construction, clean out of the basin is specified
on the plans prior to use as a wet detention basin.
5. A table of elevations, areas, incremental volumes & accumulated volumes for overall pond and for forebay,
to verify volume provided.
6. An assurance that the installed system will meet design specifications upon initial operation once the
project is complete and the entire drainage area is stabilized.
Ap
7. A construction sequence that shows how the wet detention basin will be protected from sediment until the
entire drainage area is stabilized.
7tFCAUAh
� 3
8. The supporting calculations.
9. A copy of the signed and notarized inspection and maintenance 0M) agreement.
10. A copy of the deed restriction.
Forint SW401-Wet Detention BasinAev-1
Part Ill. Required Items Choclklist, Page 3 of 3

Wet Detention Basin Inspection and Maintenance Agreement
I will keep a maintenance record on this BMP. This maintenance record will be kept in a
log in a known set location. Any deficient BMP elements noted in the inspection will be
corrected, repaired or replaced immediately. These deficiencies can affect the integrity
of structures, safety of the public, and the removal efficiency of the BMP.
The wet detention basin system is defined as the wet detention basin, REC E-W ED
pretreatment including forebays and the vegetated filter if one is provided.
This system (check one): MAY - 5 2008
E] does M does not incorporate a vegetated filter at the outlet. DWQAAJARO
This system (check one):
F] does 0 does not incorporate pretreatment other than a forebay.
Important maintenance procedures:
— Immediately after the wet detention basin is established, the plants on the
vegetated shelf and perimeter of the basin should be watered twice weekly if
needed, until the plants become established (commonly six weeks).
— No portion of the wet detention pond should be fertilized after the first initial
fertilization that is required to establish the plants on the vegetated shelf.
— Stable groundcover should be maintained in the drainage area to reduce the
sediment load to the wet detention basin.
— If the basin must be drained for an emergency or to perform maintenance, the
flushing of sediment through the emergency drain should be minin-tized to the
maximum extent practical.
— Once a year, a dam safety expert should inspect the embankment.
After the wet detention pond is established, it should be inspected once a month and
within 24 hours after every storm event greater than 1.0 inches (or 1.5 inches if in a
Coastal County). Records of inspection and maintenance should be kept in a known set
location and must be available upon request.
Inspection activities shall be performed as follows. Any problems that are found shall
be repaired immediately.
BMP element.
Potential problem:
How I will remediate the problem:
The entire BMP
Trash/debris is present.
Remove the trash/debris.
The perimeter of the wet
Areas of bare soil and/or
Regrade the soil if necessary to
detention basin
erosive gullies have formed.
remove the gully, and then plant a
ground cover and water until it is
established. Provide lime and a
one-time fertilizer application.
Vegetation is too short or too
Maintain vegetation at a height of
long.
approximately six inches.

BMP element.
Potential problem:
How I will remediate the problem:
The inlet device: pipe or
The pipe is clogged.
Unclog the pipe. Dispose of the
swale
sediment off -site.
The pipe is cracked or
Replace the pipe.
otherwise damaged.
Erosion is occurring in the
Regrade the swale if necessary to
swale.
smooth it over and provide erosion
control devices such as reinforced
turf matting or riprap to avoid
future problems with erosion.
The forebay
Sediment has accumulated to
Search for the source of the
a depth greater than the
sediment and remedy the problem if
original design depth for
possible. Remove the sediment and
sediment storage.
dispose of it in a location where it
will not cause impacts to streams or
the BMP.
Erosion has occurred.
Provide additional erosion
protection such as reinforced turf
matting or riprap if needed to
prevent future erosion problems.
Weeds are present.
Remove the weeds, preferably by
hand. If pesticide is used, wipe it on
the plants rather than spraying.
The vegetated shelf
Best professional practices
Prune according to best professional
show that pruning is needed
practices
to maintain optimal plant
health.
Plants are dead, diseased or
Determine the source of the
dying.
problem: soils, hydrology, disease,
etc. Remedy the problem and
replace plants. Provide a one-time
fertilizer application to establish the
ground cover if a soil test indicates
it is necessary.
Weeds are present.
Remove the weeds, preferably by
hand. If pesticide is used, wipe it on
the plants rather than spraying.
The main treatment area
Sediment has accumulated to
Search for the source of the
a depth greater than the
sediment and remedy the problem if
original design sediment
possible. Remove the sediment and
storage depth.
dispose of it in a location where it
will not cause impacts to streams or
the BMP.
Algal growth covers over
Consult a professional to remove
50% of the area.
and control the algal growth.
Cattails, phragmites or other
Remove the plants by wiping them
invasive plants cover 50% of
with pesticide (do not spray).
the basin surface.

BMP element:
Potential problem:
How I will remediate the problem:
The embankment
Shrubs have started to grow
Remove shrubs immediately.
on the embankment.
Evidence of muskrat or
Use traps to remove muskrats and
beaver activity is present.
consult a professional to remove
beavers.
A tree has started to grow on
Consult a dam safety specialist to
the embankment.
remove the tree.
An annual inspection by an
Make all needed repairs.
appropriate professional
shows that the embankment
needs repair.
The outlet device
Clogging has occurred.
Clean out the outlet device. Dispose
of the sediment off -site.
The outlet device is damaged
Repair or replace the outlet device.
The receiving water
Erosion or other signs of
Contact the local NC Division of
damage have occurred at the
Water Quality Regional Office, or
outlet.
the 401 Oversight Unit at 919-733-
1786.
The measuring device used to determine the sediment elevation shall be such
that it will give an accurate depth reading and not readily penetrate into
accumulated sediments.
When the permanent pool depth reads 5.0 feet in the main pond, the sediment
shall be removed.
When the permanent pool depth reads 5.0 feet in the forebay, the sediment
shall be removed.
Sediment Removal
Bottom
BASIN DIAGRAM
(fill in the blanks)
Permanent Pool Elevation 6.0
1.0 � ReMajnen�Pool
........... .. Vo
u Sediment Removal Elevation 1.0 Volume
0.0 ft Min. = -------------- I ------
Bottom Elevation 0.0 1-ft n
\2�-sediment \ ------------- LiL�
Storage Sedimer
Storage
FOREBAY MAIN POND

I acknowledge and agree by my signature below that I am responsible for the
performance of the maintenance procedures listed above. I agree to notify DWQ of any
problems with the system or prior to any changes to the system or responsible party.
Print name: Randy Keaton
Title: Pasquotank County ManacjE�--
Address: P.O. Box 39, Elizabeth CitV, NC 27907-0039
Date: q /ftR
Note: The legally responsible party should not be a homeowners association unless more than 50% of
the lots have been sold and a resident of the subdivision has been named the president.
1, Karen S. Jenninc[s , a Notary Public for the State of
-North Carolina _,County of Pasquotank I do hereby certify that
- Randy Keaton personally appeared before me this 2c)t-h
day of 1��ii 2-0-0-8- and acknowledge the due execution of the
forgoing wet detention basin maintenance requirements. Witness my hand and official
ka- r-e- C,
0
SEAL
My commission expires May 18, 2012