SW7060905_CURRENT PERMIT_20070404

STORMWATER DIVISION CODING SHEET
POST -CONSTRUCTION PERMITS
PERMIT NO.
SW 7D
DOC TYPE
CURRENT PERMIT
❑ APPROVED PLANS
❑ HISTORICAL FILE
❑ COMPLIANCE EVALUATION INSPECTION
DOC DATE
YYYYMMDD

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`NATFRQ
Michael F. Easley, Governor
�OF
G
G. Ross Jr., Secretary
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William
North Carolina Department of Environment and Natural Resources
Alan W. Klimek, P.E. Director
Division of Water Quality
DIVISION OF WATER QUALITY
April 4, 2007
Town of Hertford
Attn: Mr. John Christensen
PO Box 32
Hertford, NC 27944
Subject: Stormwater Permit No. SW7060905
Town of Hertford Water Plant
High Density Stormwater Project
Perquimans County
Dear Mr. Christensen:
The Washington Regional Office received your completed
Stormwater Application for the subject project on January 25,
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. SW7060905 dated April 4, 2007 to the Town of
Hertford, NC.
This permit shall be effective from the date of issuance
until April 4, 2017 and shall be subject to the conditions and
limitations as specified therein. Please pay special attention to
the Operation and Maintenance requirements in this permit.
Failure to establish an adequate system for operation and
maintenance of the stormwater 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.
North Carolina Division of Water Quality Internet: h2o.encstate.nc.us
943 Washington Square Mall Phone: [phone]
Washington, NC 27889 FAX [phone]
An Equal OpportunitylAffirmative Action Employer— 50% Recycled110% Post Consumer Paper
NorthCarolina
Naturally

Town of Hertford
April.4, 2007
Page Two
If you have any questions, or need additional information
concerning this matter, please contact Mr. Bill Moore at (252)948-
3919.
�ncerel ,
Al Hodge, Regional Supervisor
Surface Water Protection Section
Washington Regional Office
cc: Green Engineering
Perquimans County Planning/Inspections
✓WARD Stormwater Files
Central Files

State Stormwater Management Systems
Permit No. SW7060905
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
Town of Hertford
Perquimans County
FOR THE
construction, operation and maintenance of stormwater management
systems 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 for
grassed swales and a Bioretention Filter to server the new Water
Treatment Plant located at Hertford, NC'.
This permit shall be effective from the date of issuance until
April 4, 2017, and shall be subject to the following specified
conditions and limitations:
I. DESIGN STANDARDS
1. This permit is effective only with respect to the nature and
volume of stormwater described in the application and other
supporting data.
2. This stormwater system has been approved for the management
of stormwater runoff as described on page 4 of this permit,
the Project Data Sheet.
3. Approved plans and specifications for this project are
incorporated by reference and are enforceable parts of the
permit.
3

S
DIVISION OF WATER QUALITY
PROJECT DATA
Project Name:
Permit Number:
Location:
Applicant:
Mailing Address:
Application Date:
Water Body Receiving Stormwater
Runoff:
Classification of Water Body:
Total Site Area:
Total Impervious
Surfaces Allowed:
BioEilter Storage:
Depth
Required Storage Volume:
Provided Storage Volume:
Provided Surface Area:
Storage Elevations:
0
Town of Hertford
Water Treatment Plant
SW706O9O5
Perquimans County
Town of Hertford
PO Box 32
Hertford, NC 27944
09/07/2006; original
01/25/2007; complete
Perquimans River
SC
1.52 acres
0.34 acres
1.0 ft
4358 cf
4534 cf
4707 sf
overflow structure set
at elevation 6.25

a
4. No homeowner/lot owner/developer shall be allowed to fill in,
alter, or pipe any vegetative practices (such as swales)
shown on the approved plans as part of the stormwater
management system without submitting a revision to the permit
and receiving approval from the Division.
5. The following items will require a modification to the
permit:
a. Any revision to the approved plans, regardless of size
b. Project name change
C. Transfer of ownership
d. Redesign or addition to the approved amount of built -
upon area
e. Further subdivision of the project area.
In addition, the Director may determine that other revisions
to the project should require a modification to the permit.
6. 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.
II. SCHEDULE OF COMPLIANCE
1. The permittee will comply with the following schedule for
construction and maintenance of the stormwater management.
system.
a. 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 surfaces except roads.
b. During construction, erosion shall be kept to a minimum
and any eroded areas of the system will be repaired
immediately.
2. The facilities must be properly maintained and operated at
all times. The approved Operation and Maintenance Plan must
be followed in its entirety and maintenance must occur at the
scheduled intervals.
3. The permittee shall at all times provide the operation and
maintenance necessary to assure the permitted stormwater
system functions at optimum efficiency including, but not
limited to:
5

U
a. Semi-annual scheduled inspections (every 6 months)
b. Sediment removal
C. Mowing and revegetation of side slopes
d. Immediate repair of eroded areas
e. Maintenance of side slopes in accordance with approved
plans and specifications
f. Debris removal and unclogging of outlet structure,
orifice device and catch basins and piping.
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.
5. 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.
6. Upon completion of construction 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. Mail the
Certification to the Washington Regional Office, 943
Washington Square Mall, Washington, North Carolina, 27889,
attention Division of Water Quality.
7. A copy of the approved plans and specifications shall be
maintained on file by .the Permittee for a minimum of five
years from the date of the completion of construction.
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.
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 143-215.6(a) to 143-215.6(c).
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.
6

9. 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 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.
6. At least 6 months prior to the expiration date, the permittee
shall request that this permit be renewed.
Permit issued this the 4 th day of April, 2007.
NORTH CAROLINA ENVIRONMENTAL MANAGEMENT COMMISSION
Alart W. Klimek,- P.E., Director
Division of,Water Quality
By Authority of the Environmental
Permit Number SW7060905
7
WWWM
ilmom
Management Commission

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i
Stormwater Permit SW7060905
Grassed Swales & (1) Bioretention Filter
Town of Hertford Water Treatment Plant
Hertford, NC
Designer's Certification
I,
as a duly
registered Professional Engineer in the State of North Carolina,
having been authorized to observe (periodically/weekly/full time)
the construction of the project,
for
(Project)
(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.
Signature
Registration Number
Date
P

i
E140 State of North Carolina StArCi,-
exffS [RD ®WQ WARD9partment of Environment and Natural Resources
1 ?1,,�� _D pf a,3 Division of Water Quality
vecka` � �e� STORMWATER MANAGEMENT PERMIT APPLICATION FORM
This form may be photocopied for use as an original
I. GENERAL INFORMATION
1. Applicants name(specify the name of the corporation, individual, etc. who owns the project):
Town of Hertford
2. Print Owner/Signing Official's name and title (person legally responsible for facility and compliance):
_ ohn Christensen -Town Man— er
- - _
3. Mailing Address for person listed in item 2 above:
Town of Hertfor4 Post Office Box 32
Zip:
Number.
4. Project Name (subdivision, facility, or establishment name - should be consistent with project name on
plans, specifications, letters, operation and maintenance agreements, etc.):
Town of Hertford Water Treatment Plant Improvements
5. Location of Project (street address):
Grubb Street and Clark Street
6. Directions to project (from nearest major Intersection):
Site located approximately 1 mile southeast of the Intersection of SR 1108
7. Latitude: I Longitude:
8. Contact person who can answer question about the project:
Name: E. Leo Green, Jr., P.E. Telephone Numbers: 252-237-5365
II. PERMIT INFORMATION:
1. Specify whether project is (check one):
From SWU-101 Version 3.99
at
of project
New Renewal X Modification
Page 1 of 4
G:E98-175.2\ston ter management permit app

2. If this application is being submitted as the result of a renewal or modification to an existing permit, list the
existing permit number N/A and its issue date (if known)
3. Specify the type of project (check one):
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 X NPDES Stormwater
Information on required state permits can be obtained by contacting the Customer Service Center at
1-877-623-6748.
Ili :J:Wl1x049IN ;W WIF-•1111101PI
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 for the proposed Droiect will be collected via a storm drainaae Pipe collection
system and routed through a bioretention area and discharged at least 30' from the stream bank.
2. Stormwater runoff from this project drains to the Pasquotank River basin.
3. Total Project Area: 1.52 acres 4. Project Built Upon Area: 36.05
5. How many drainage areas does the project have? 1
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
Perquimans River
Receiving Stream Class
Drainage Area
1.52 Ac 66 Z// rf
Existing Impervious *Area
3,900 SF
Proposed Impervious * Area
32,547
% Impervious * Area total
55 %
Impervious * Surface Area
Drainage Area 1
Drainage Area 2
On -site Buildings
1055
On -site Streets
0
On -site Parking
17,505
On -site Sidewalks
1,622
Other on -site
12,365
Off -site
Total: 32,547
JTotaI7
*Impervious area is defined as the built upon area including, but not limited to, buildings, roads, parking areas,
sidewalks, gravel areas, etc. ,
Page 2 of 4
Form SWU-101 Version 3.99
G:E9&175.21stormwater management permit app

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.
1. 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 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 tilled 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 outparoels or future development shall be directed into the permitted stormwater
control system. These connections to the stormwater control system shall be performed in a manner that
maintains the integrity and performance of the system as permitted.
By your signature below, you certify that the recorded deed restrictions and protective covenants for this project
shall include all the applicable items required above, that the covenants will be binding on all parties and
persons darning 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 (919)7335083 for the
status and availability of these fortes.
Form SWU-102
Wet Detention Basin Supplement
Form SWU-103
Infiltration Basin Supplement
Form SWU-104
Low Density Supplement
Form SWU-105
Curb Outlet System Supplement
Form SWU-106
Off -Site System Supplement
Forth SWU-107
Underground Infiltration Trench Supplement
Forth SWU-108
Neuse River Basin Supplement
Form SWU-109
Innovative Best Management Practice Supplement
Page 3 of 4
Forth SWU-101 Version 3.99
G:Eg&1752%stormwater nwagement permft app

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.
1. Please indicated that you have provided the following required information by initialing in the space
provided next to each item.
• Original and one copy of the Stor mwater Management Permit Application Form
• One copy of the applicable Supplement Form(s) for each BMP
• Permit application processing fee of $420 (payable to NCDENR)
• Detailed narrative description of stormwater treatmenUmanagement
• 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 or roads, drainage features, collection systems, and stormwater control measures
- Wetlands delineated, or a note on plans that none exist
- Existing drainage (including off4te), 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):
Mailing Address:
City:
Phone:
Vill. APPLICANTS CERTIFICATION
State:
Fax:
Zip:
I, (print or type name of person listed in General Information, item 2)
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
Date:-5— I (0 - 03
Forth SWUA01 Version 3.99

!GREEN ENGINEERING, P.L.L.C.
NCDENR - DEN
Tran 4 invoice Type Date Reference
15612 090606 Invoice 09/06/06 PERM= =S - k/O E96-175.2
RECEIVED
SEP - 12006
DWQ-WARQ
e GREEN ENGINEERING, © P.L.ENGINEERSIPU E VEYORS
POST OFFICICBOX 60E BOX 609
303 NORTH GOLDSBORO STREET
WILSON, NORTH CAROLINA 27893
Exactly Four hundred t»enty and no / 100 Dollars
TO rY NCDENR - DEM
ORDER
OF
Date: 9/6/2006
Ra_ance
$420.00
NO
B..n.E Bankiny.nd Tmxt COmy..y
66-uvssi
Check Number:
Check Amt:
Discount
$0.00
CHECK NO.
20733rL2
$42C.00
Pay Amount
$420.00
22q 73g 2
DATE AMOUNT
9/6/2006 $420.00
u•020732111 1:053LOIL2L1:00052LI.L313265ti'
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September 1, 2006
North Carolina Department of Environment
And Natural Resources
Division of Environmental Management
943 Washington Square Mall
Washington, North Carolina 27889
Attention: Mr. William Moore
SUBJECT: Water Treatment Plant Improvements
Stormwater Management Permit
Hertford, North Carolina
PN: E98-175.2
Dear Mr. Moore:
SEP - 7 2006
DWQ-WARD
Per our conversation please find attached for your continued review the following:
Original and one copy of the Stormwater Management Permit Application Form
Permit application processing fee of $420.00 (payable to NCDENR)
Detailed narrative description of stormwater treatment/management
Two (2) copies of plans and specifications
Calculations for Bio-Retention Area
Project data sheet
I trust this information will be sufficient for your continued review.
Please call me if you have any questions.
Resp ctfully,
E. Leo Green, III, P.E.
ELG,IIUpbg
O:\Wo98\E98115.2\williarn sworeF W3LG10iR MCMPAmRhFA`"6.18$EEN ENGINEERING, PLLC
WATER, WASTEWATER SURVEYING, PLANNING. PROJECT MANAGEMENT
303 N. GOLDSBORO ST. PO BOX 609 WILSON N.C. 27893 TEL 252,2 3 7 . 5365 FAX [phone] WWW.GREENENGINEERING.COM

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DIVISION OF WATER QUALITY
PROJECT DATA
Project Name:
Permit Number:
Location:
Application:
Mailing Address:
Application Date:
Water Body Receiving Stormwater
Runoff -
Classification of Water Body:
Total Site Area:
Total Impervious Surfaces Allowed:
BioFilter Storage Depth:
Required Surface Area (based on 7%)
Provided Surface Area:
Required Storage Volume:
(based on 1.0-inch runoff)
Provided Storage Volume:
Controlling Orifice:
OAWOME98175.2NMSION OF WAM QUALITY. ProjW UNe shm 9-1-06.dm
Town of Hertford
Water Treatment Plant
SW7030608
Perquimans County
Town of Hertford
PO Box 32
Hertford, North Carolina 27944
06-10-03;original
10/20/03; complete
Perquimans County
SC
1.52 acres
0.34 acres
0.95 ft
4,634 sf
4,707 sf
4,358 cf
4,534 cf
overflow structure
elevation 6.25