SW7070706_CURRENT PERMIT_20130308

STORMWATER DIVISION CODING SHEET
POST -CONSTRUCTION PERMITS
PERMIT NO.
SWZQ�j
DOC TYPE
CURRENT PERMIT
❑ . APPROVED PLANS
❑ HISTORICAL FILE
❑ COMPLIANCE EVALUATION INSPECTION
DOC DATE
YYYYMM DD

J Ale NA wa:ko
MCDE R"
North Carolina Department of Environment and Natural Resources
Division of Water Quality
Pat McCrory Charles Wakild, P. E. John E. Skvarla, III
Governor Director. Secretary
March 8, 2013
Mr. Don Davis, V.P. of Operations
DRS —Technical Services, Inc.
1060 Consolidated Rd.
Elizabeth City, NC 27909
Subject: Permit No. SW7070706
DRS, Phase 2
High Density Stormwater Project
Dear Mr. Davis: Pasquotank County
The Washington Regional Office received a complete Stormwater Management Permit
Application for the transfer of ownership of DRS, Phase 2 from DRS C3 & Aviation Company to
DRS Technical Services, Inc. on March 8, 2013. 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. SW7070706 dated March 8,
2013, for the continued construction and operation and maintenance of the subject project. By
issuance of this permit the permit issued on January 13, 2011 is hereby rescinded.
This permit shall be effective from the date of issuance unti July 27, 2021 nd shall be subject
to the conditions and limitations as specified therein. Please a attention to the
Operation and Maintenance requirements in this permit and in the submitted application. 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
either Scott Vinson, or me at [phone].
Sin rely,
Charles Wakild, Director
Surface Water Protection Section
AA/sav: C:ISTORMWATERIPERMIT1SW7070706
cc: Washington Regional Office
North Carolina Division of Water Quality
943 Washington Square Mail
Washington, !North Carolina 27889
Phone: [phone] FAX: [phone]
Internet wwrtmaterquality.om
One
NOrtliCarolina
Natimally
An Equal Oppodunity 1 Affirmative Action+ Employer

State Stormwater Management Systems
Permit No. SW7070706
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
DRS Technical Services, Inc.
DRS, Phase 2
Pasquotank County
FOR THE
construction, operation and maintenance of a wet detention basin 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 July 27, 2021, 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 in Section 1.6 on page 3 of this permit. The stormwater controls have been
designed to handle the runoff from 3.66 acres of impervious area.
3. 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 and 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.
5. Approved plans and specifications for this project are incorporated by reference and are
enforceable parts of the permit. The runoff from all built -upon area within the permitted
drainage areas of this project must be directed into the permitted stormwater control
system.
Page 2 of 6

State Stormwater Management Systems
Permit No. SW7070706
6. The following design criteria have been provided in the wet detention pond and must be
maintained at design condition:
a.
Drainage Area, acres:
4.24
b.
Total Impervious Surfaces, ft2:
159,304 (3.66ac.)
C.
Design Storm, inches:
1.0
d.
Pond Depth, feet:
6.00
e.
TSS removal efficiency:
90%
f.
Permanent Pool Elevation, FMSL:
3.50
g.
Permanent Pool Surface Area, ft2:
10,135
h.
Permanent Storage Volume, ft3:
23,788
i.
Permitted Forebay Volume, ft3:
5,131
j.
Temporary Storage Elevation, FMSL:
4.85
k.
Temporary Storage Volume, ft3:
15,111
I.
Controlling Orifice:
1.875" � pipe
M.
Receiving Stream/River Basin:
Pasquotank River 1 Neuse
n.
Stream Index Number:
30 - 3 - (12)
o.
Classification of Water Body:
"SB"
II. SCHEDULE OF COMPLIANCE
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 Plans 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 bypass structure, filter media, flow spreader,
catch basins, piping and vegetated filter.
g. A clear access path to the bypass structure must be available at all times.
Page 3 of 6

State Stormwater Management Systems
Permit No. SW7070706
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. 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.
6. 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.
7. 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.
8. Access to the stormwater facilities shall be maintained via appropriate easements at all
times.
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, 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.
10. The permittee shall submit final site layout and gradin.9 plans for any permitted future
areas shown on the approved plans, prior to construction.
11. A copy of the approved plans and specifications shall be maintained on file by the
Permittee for the life of the project.
12. 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.
13. This permit shall be effective from the date of issuance until July 27, 2021. Application
for permit renewal shall be submitted 180 days prior to the expiration date of this permit
and must be accompanied by the processing fee.
14. No homeowner/lot owner/developer shall fill in, alter, or pipe any drainage feature (such
as swales) shown on the approved plans as part of the stormwater management system
without submitting a revision to the permit and receiving approval from the Division.
Page 4 of 6

State Stormwater Management Systems
Permit No. SW7070706
15. Prior to transfer of the permit, the stormwater facilities will be inspected by DWQ
personnel. The facility must be in compliance with all permit conditions. Any items not in
compliance must be repaired or replaced to design condition prior to the transfer.
Records of maintenance activities performed to date will be required.
16. Prior to the sale of any lot, the following deed restrictions must be recorded:
a. The following covenants are intended to ensure ongoing compliance with State
Stormwater Management Permit Number SW7070706, as issued by the Division
of Water Quality under NCAC 2H.1000.
b. The State of North Carolina is made a beneficiary of these covenants to the extent
necessary to maintain compliance with the Stormwater Management Permit.
C. These covenants are to run with the land and be binding on all persons and
parties claiming under them.
d. The covenants pertaining to stormwater may not be altered or rescinded without
the express written consent of the State of North Carolina, Division of Water
Quality.
e. Alteration of the drainage as shown on the approved plans may not take place
without the concurrence of the Division of Water Quality.
Construction of additional built -upon area in excess of 159,304 square feet, as
noted in the permit and on the approved plans, will require a permit modification.
g. All runoff on the lot must drain into the permitted system.
h. Filling in or piping of any vegetative conveyances (ditches, swales, etc.)
associated with this development, except for average driveway crossings, is
strictly prohibited by any persons.
17. A copy of the recorded deed restrictions must be submitted to the Division within
30 days of the date of recording the plat, and prior to selling lots. The recorded
copy must contain all of the statements above, the signature of the Permittee, the
deed book number and page, and the stamp/signature of the Register of Deeds.
1$. Built upon area includes, but is not limited to, structures, asphalt, concrete, gravel, brick,
stone, slate, coquina and parking areas, but does not include raised, open wood decking,
or the water surface of swimming pools.
III. 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 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.
Page 5of6

State Stormwater Management Systems
Permit No. SW7070706
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. A copy of the approved plans and specifications shall be
maintained on file by the Permittee for the life of the project.
9. The permittee shall notify the Division any name, ownership or mailing address changes
within 30 days.
Permit issued this the 8'h day of March, 2013.
NORTH CAROLINA ENVIRONMENTAL MANAGEMENT COMMISSION
for
0
fl i rnnt.� r
Division of \/V6ter Quality
By Authority of the Environmental Management Commission
Permit Number SW7070706
Page 6 of 6

State Stormwater Management Systems
Permit No. SVV7070706
PagLuotank County
Designer's Certification
1, Sean C: Robey , as a duly registered professional engineer in the
State of North Carolina, having been authorized to observe-(per'sod+eaatylA*3-e�ly/-fuU-tines) the
construction of the project, inspect after completion
DRS Technologies (Formerly TAMSCO Corp.) Phase 2
(Project) , ._...__.__.., � ....
for DRS Technologies (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:
•
Registration Number
G8$s-d
Date // _ d - / z-
`�����uw+rrrr�
`��� CA fro ��i����
y` oF-ss'16
;y9
.4
SEAL
18550
SEAL_
rr�nmt�
RECEIVED
NOV 1 4 2012
DWQ-WARD
Certification Requirements:
Page 7 of 8

State Stormwater Management Systems
Permit No. SW7070706
X 1.
X 2.
X 3.
x 4.
X 0,
X 6.
X 11
X 12,
The drainage area to the system contains approximately the permitted acreage.
The drainage area to the system contains no more than the permitted amount of
built -upon area.
All the built -upon area associated with the project is graded such that the runoff
drains to the system.
All roof drains are located such that the runoff is directed into the system.
The bypass structure elevations are per the approved plan.
The bypass structure is located per the approved plans.
A Trash Rack is provided on the outlet/bypass structure.
All slopes are grassed with permanent'vegetation.
Vegetated slopes are no steeper than 3:1.
The inlets are located per the approved plans and do not cause short-circuiting of
the system.
The permitted amounts of surface area and/or volume have been provided.
All required design depths are provided.
X 13. All required parts of the system are provided.
X 14. The required system dimensions are provided per the approved plans.
CC" NCDENR-DWQ Regional Office
Pasquotank County Building Inspections
Elizabeth City Building Inspections
Page 8 of 8

November 9, 2012
Mr. Scott Vinson
Dept. of Environment and Natural Resources
Water Quality Section
943 Washington Square Mall
Washington, NC 27889
Subject: Stormwater Management Permit
DRS Technologies — Phase 2
(formerly TAMSCO Corporation)
Proj. #120369
Stormwater Permit No. SW7070706
Dear Mr. Vinson:
HYMAN
ROBEY-®
RECEIVED
NOV 1 4 2012
pyyQ-WARO
Enclosed please find the Designer's Certification for the above referenced detention pond.
If you have any questions or require additional information, please do not hesitate to call this
office at [phone].
Sincerely,
Kimberly D. Hamby
Engineering Project Manager
cc: file
Ken Norris
P. O. Box 339 Camden, North Carolina 27921
[phone] License C-0598
Hyman B Robey, PC www.hymanrobey.com

1
NCDENR
North Carolina Department of Environment and Natural Resources�if��
Division of Water Quality G
it
Beverly Eaves Perdue Coleen H. Sullins Dee Freeman
Governor Director Secretary
STATE STORMWATER PERMIT NAME/OWNERSHIP CHANGE�������
I. CURRENT PERMIT INFORMATION
g �w 9-0q-��a ( NOV 10 2010
1. Stormwater Management Permit Number:
2. Project Name: — /A) -tit C o 1-2l0 /4-ri, nW@
#
3. Current Permit Holder's Company Name/Organization: 02�jo,v
4. Signing Official's Name: -..} Qrr 7;e r'c'I Title:
(person legally responsible for permit) n
5. Mailing Address: O O C-�O N S o L1t d4-1
City: C Stater Zip:
6. Phone: PJ )_,� - e Z"P/ Fax: ( )
'S6,L177
II. PROPOSED PERMITTEE 1 OWNER / PROJECT / ADDRESS INFORMATION
This request is for: (please check all that apply)
❑ Name change of the owner (Please complete Items 1, 2 and 3 below)
2C❑ ame change of project (Please complete Item 5 below)
Change in ownership of the property/company (Please complete Items 1, 2, 3, and 4 below)
❑ Mailing address 1 phone number change. (Please complete Item 4 below)
❑ Other (please explain):
1. Proposed permittee's company name/organization: Jb12SS C 3 �- 14✓1rt-TIJN � AC��-y
2. Proposed permittee's signing' official's name: � �h `) V r
3. Proposed permittee's Title: V . P o
4. Mailing Address: / o Q CD n1 S--
City: 14 �3r �4c7 State: �� Zip: � 9 9
Phone: (� )_.3 �� o Z X� Fax: ( }
5. New Project Name to be placed on permit: __D (� S CS --v k4i Y,
Please check the appropriate box. The proposed permittee listed above is:
❑ HOA or POA (Attach a copy of the deed transferring ownership of all common areas. Print Name
of HOA or POA in #1 above and provide name of HOA(POA) president in #2 above).
❑ The property owner.
❑ Lessee (Attach a copy of the lease agreement and complete Property Owner Information on
page 4)
❑ Purchaser (Attach a copy of the pending sales agreement and complete Property Owner
Information on page 4)
❑ Developer (Complete Property Owner Information on page 4)
SSW N10 Change Revl6Nov2009 Page 1 of 4

III. REQUIRED ITEMS
This application package will not be accepted by the Division of Water Quality unless all of the
applicable required items listed below are included with the submittal.
1 . This completed and signed form.
2. Legal documentation of the transfer of ownership. (For Permit Transfers Complete Current Permittee
and Proposed Permittee Sections)
3. A copy of the recorded deed restrictions, if required by the permit.
4. The designer's certification, if required by the permit and if not already submitted to DWQ.
5. If the Proposed Permittee is a corporation, LLC or General Partnership, provide documentation from
the Secretary of State office, which supports the named president, vice president, member, manager
or General Partner.
6. The $40.00 processing fee. If this is an initial transfer from the original permittee to the property owner
or other responsible party such as an HOA, the processing fee is not required. Subsequent ownership
transfers will require the $40.00 processing fee.
IV. CURRENT PERMITTEE'S CERTIFICATION
Please check one of the following statements:
❑ Check here if the Current Owner is only changing the owner name, company name or project
name, or the mailing address, and will retain ownership of the permit.
I, , the current owner, hereby notify the Division of
Water Quality that I am changing my name or company name and/or I am changing my mailing
address and/or I am changing the name of the permitted project. I further attest that this application
for a name/ownership change is accurate and complete to the best of my knowledge. I understand
that if all required parts of this application are not completed and that if all required supporting
information and attachments as outlined above are not included, this application package will be
returned as incomplete.
�eck here if Current Owner is transferring (selling) the property to a new owner and will not
retain ownership of the permit.
I, .6 .0- fi� , the current owner, am submitting this application for a transfer of
ownership for permit # So y . I hereby notify DWQ of the sale or other legal transfer
of the stormwater system associated with this permit. I further acknowledge and attest that I have
transmitted a copy of the most recent permit, a copy of the Designers Certification, a copy of the
DWQ approved plans and/or approved as -built plans, a copy of the approved Operation and
Maintenance agreement and copies of past maintenance records to the Proposed Permittee named
in Sections II and V of this form at the mailing address listed in Section 11 of this form. 1 further attest
that I assign all rights and obligations as permittee to the Proposed Permittee named in Section V of
this form. I understand that this transfer of ownership cannot be approved by the Division of Water
Quality unless and until the facility is in compliance with the permit and the Proposed Permittee signs
this form. I understand that in the event the facility is not in compliance or the Proposed Permittee
does not sign this form, the responsibility to bring the facility into compliance and to comply with the
terms and conditions of the permit remains with me until such time as the Proposed Permittee signs
this form and t e Division approves i
Signature: '1 Date:
a Notary Public for the State of
County of , do hereby certify that
personally appeared before me this the
day of , 20, and acknowledge the due execution of the
forgoing instrument. Witness my hand and official seal, (Notary Seal)
Notary Signature
SSW N/O Change Rev16Nov2009 Page 2 of 4

V. PROPOSED PERMITTEE CERTIFICATION: (This section must be completed by the
Proposed Permittee for all transfers of ownership)
ID I, �� 'i✓ a-✓k S , hereby notify the Division of Water Quality that I have
acquired through sale, lease or legal transfer, the responsibility for constructing and/or operating and
maintaining, the permitted stormwater management system. I have examined the permit and
inspected the permitted facility, and agree to assume the rights and liabilities contained in the permit
and to comply with the terms and conditions of the permit.
I attest that I have reviewed this application for an ownership change and it is accurate and complete
to the best of my knowledge. I understand that if all required parts of this application are not
completed and that if all required supporting information and attachments are not included, this
application package will be returned as incomplete.
I further acknowledge and attest that in the event the required facility inspection reveals that the
project is not in compliance with the permit, I understand this transfer of ownership will not be
approved until the project is brought into compliance. I acknowledge and attest that I have received a
copy of the most recent permit, a copy of the Designer's Certification, a copy of the DWQ approved
plans and/or approved as -built plans, a copy of the approved Operation and Maintenance agreement
and copies of past maintenance records from the previous permittee. I further acknowledge and
agree that I will construct and/or operate and maintain the system per the requirements listed in the
permit and in the Operation an Maintenance agreement.
Signature: / u--- Date: 1 r/p10&a
I, 11VVY-A , a Notary Public for the State of
­�,(xk lO�C,%) Y, County of , zm b f-O\do hereby certify that
personally appeared before me this the
t' day of N cf- mtyr 20A-Q-, and acknowledge the due execution of the
forgoing instrument. Witness my hand and official seal,
.�
Notary Signature
My Commission Expires
November 24, 241 3
{Notary Seal
Additional copies of the original permit and the approved Operation and Maintenance plan can be
obtained from the appropriate Regional Office of the Division of Water Quality.
This completed form, including all supporting documents and processing fee, should be sent to the
appropriate Regional Office of the North Carolina Department of Environment and Natural
Resources, Division of Water Quality, as shown on the attached map.
Please note that if the Proposed Permittee listed above is not the property owner, the property owner
must complete and sign page 4 of this document. Both the lessee / developer and the property
owner will appear on the permit as permittees.
SSW N/O Change Rev16Nov2009 Page 3 of 4

VI. PROPERTY OWNER CONTACT INFORMATION AND CERTIFICATION
If the Proposed Permittee listed in Sections II and V of this form is not the Property Owner, the
Property Owner must provide his/her Contact Information below and sign this form:
Printed Name:
Organization:
Title within the Organization:
Street Address:
City:
Mailing Address:
City:
Phone:
Email:
State:
(if different from street address)
State:
Fax:
Zip:
Zip:
I certify that I own the property identified in this permit transfer document and have given permission
to the Proposed Permittee listed in Sections 11 and V to develop, lease or purchase the property. A
copy of the lease agreement or pending property sales contract has been provided with the
submittal, which indicates the party responsible for the construction and/or operation and
maintenance of the stormwater system.
As the legal property owner I acknowledge, understand, and agree by my signature below, that I will
appear as a permittee along with the lessee/developer and that if the designated Proposed
Permittee dissolves their company and/or cancels or defaults on their lease agreement or pending
sales contract, responsibility for compliance with the DWQ Stormwater permit reverts back to me,
the property owner. As the property owner, it is my responsibility to notify DWQ by submitting a
completed Name/Ownership Change Form within 30 days of procuring a developer, lessee or
purchaser for the property. I understand that failure to operate and maintain the stormwater
treatment facility in accordance with the permit is a violation of NC General Statue 143-215.1, and
may result in appropriate enforcement action including the assessment of civil penalties of up to
$25,000 per day, pursuant to NCGS 143-215.6.
Signature of the property owner
Date:
I, , a Notary Public for the State of
, County of , do hereby certify that
personally appeared before me this the
day of , 20 , and acknowledge the due execution of the
forgoing instrument. Witness my hand and official seal,
Notary Signature
(Notary Seal)
SSW N/0 Change Rev16Nov2009
Page 4 of 4

Permit Number: 'S 6 7`0 -?- o b
(to be provided by DWQ)
Drainage Area Number:
Wet Detention Basin Operation 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,
pretreatment including forebays and the vegetated filter if one is provided.
This system (check one):
❑ does ® does not incorporate a vegetated filter at the outlet.
This system (check one):
❑ does ® 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 minimized 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 operation 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:
Potentialproblem:
How 1 will remediate theproblem:
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.
Form SW401-Wet Detention Basin 0&.M-Rev.4 Page 1 of 5

Permit Number:
(to be provided by D{t'Q)
Drainage Area Number:
Form SW401-Wet Detention Basin O&M-Rev.4 Page 2 of 5

Permit Number:
(to be provided by DIYQ)
Drainage Area Number:
BMP element:
Potentialproblem:
How I will remediate theproblem:
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.
Form SW401-Wet Detention Basin O&M-Rev.4 Page 3) of 5

Permit Number:
(to be provided by DWQ)
Drainage Area Number:
BMP element:
Potentialproblem:
How I will remediate theproblem:
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, if applicable)
The outlet device
Clogging has occurred.
Clean out the outlet device. Dispose
of the sed iment 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 4.5 feet in the main pond, the sediment
shall be removed.
When the permanent pool depth reads 2.25 feet in the forebay, the sediment
shall be removed.
BASIN DIAGRAM
(fill in the blanks)
Sediment Removal E . 1.25 Pe manenl
_ _ Volume
Bottom Elevatio .50 -sediment
Min.
Sediment
Storage
FOREBAY
Pool
Permanent Pool Elevation 3.5
Sediment Removal Elevation _ 1.0 Volume
-------------- -----
Bottom Elevation
MAIN POND
l -ft n.
Sediment
Storage
Form SW401-Wet Detention Basin O&M-Rev.4 Page 4 of 5

Permit Number:
(to be provided by DWQ)
1 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.
Pt-gjecl name: DRS C3 & Aviation 1060 Consolidated Rd. Elizabeth City, NC 27909
BMP drainage area number:
Print name: Don Davis
Title: Vice President, Elizabeth City perations
Address: 1060 Consolidated Rd. ELizabeth City, NC 27909
Phone: [phone] A
Signature:_,
Date:
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.
I, > A MiCh Q FOQQMZpd a Notary Public for the State of
����c)r ,County of�('[�nl� , do hereby certify that
)C],V 'i's _ personally appeared before me this Rtt
day of e m Ix, ,mac) and acknowledge the due execution of the
forgoing wet detention basin maintenance requirements. Witness my hand and official
seal,
SEAL
My Commission Expiree
November 24, 2413
My commission expire
Form SW401-Wet Detention Basin O&M-Rev.4
Page 5 of 5