SW8020532_CURRENT PERMIT_20031031

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

OF 1 A 1 F�
Michael F. Easley, Governor
p
North Carolina Department
William G. Ross Jr. Secretary
Environment and Natural iResources
�O
co
j
of
Alan W. Klimek, P.E.,Director
p t
Division of Water Quality
Coleen H. Sullins, Deputy Director
Division of Water Quality
October 31, 2003
Cdr. Ben D. Pina, Public Works Officer
Marine Corps Base
1005 Michael Road
Camp Lejeune, NC 28542-0004
Subject: Permit No. SW8 020532
HQ Armory N62470-99-R-9158
High Density Stormwater Project
Onslow County
Dear Cdr. Pina:
The Wilmington Regional Office received a complete, modified Stormwater
Management Permit Application for HQ Armory on September 29, 2003. Staff review of
the plans and specifications has determined that the project, as proposed, will comply
with the Stormwater Regulations set forth in Title 15A NCAC 2H.1000. We are
forwarding Permit No. SW8 020532 dated October 31, 2003, for the construction of HQ
Armory.
This permit shall be effective from the date of issuance until October 31, 2013, 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 150E of the North Carolina General Statutes, and filed
with the Office of Administrative Hearings, P.O. Drawer 27447, Raleigh, NC 27611-
7447. Unless such demands are made this permit shall be final and binding.
If you have any questions, or need additional information concerning this matter, please
contact Linda Lewis, or me at [phone].
Sincerely,
Rick Shiver
Water Quality Regional Supervisor
RSS/arl:
S:IWQSISTORMWATIPERMIT1020532.00T
CC.'
Kevin Avolis, P.E.
A.G. Sholar, Asst. PWO
Division of Land Resources (Ref. ON02127)
Linda Lewis
Wilmington Regional Office
Central Files
N. C. Division of Water Quality 127 Cardinal Drive Extension [phone] Customer Service
Wilmington Regional Office Wilmington, NC 28406 [phone] Fax [phone]
A*A
NCDENR

State Stormwater Management Systems
Permit No. SW8 020532
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
Marine Corps Base
HQ Armory (N62470-99-R-9958)
Onslow 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 October 31, 2013, and
shall be subject to the following specified conditions and limitations:
1. DESIGN STANDARDS
1. This permit is effective only with respect to the nature and volume of stormwater
described in the application and other supporting data.
2. This stormwater system has been approved for the management of stormwater
runoff as described on page 3 of this permit, the Project Data Sheet. The
stormwater control has been designed to handle the runoff from 29,506 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.
6. The project may be constructed without the permitted pond as long as the
disturbed area remains less than 1 acre. If at any time the disturbance for this
project exceeds 1 acre, as determined by the Division of Land Resources, the
pond must be constructed as approved.
Page 2 of 8

State Stormwater Management Systems
Permit No. SW8 020532
DIVISION OF WATER QUALITY
PROJECT DESIGN
DATA SHEET
Project Name:
HO Armory (N62470-99-R-9158)
Permit Number:
SW8 020532
Location:
Onslow County
Applicant:
Cdr. Ben D. Pina, Pubiic Works Officer
Mailing Address:
Marine Corps Base
1005 Michael Road
Camp Lejeune, NC 28542-0004
Application Date:
August 21, 2002
Modified September 29, 2003
Receiving Stream/River Basin/Index #:
White Oak 1 New River 1 19-(15.5)
Classification of Water Body:
"SC NSW"
Pond Depth, feet:
Permanent Pool Elevation, FMSL:
Drainage Area, acres:
Total Impervious Surfaces, ft2:
Offsite Area entering Pond ft2:
Provided Surface Area, ft2:
Provided Storage Volume ft3:
Temporary Storage Elevation, FMSL:
Controlling Orifice:
4
6.56 (2.0 M)
0.87
29,506
5,328
2,799
2,672
7.26 (2.21 M)
1" � pipe
Page 3 of 8

State Stormwater Management Systems
Permit No, SW8 020532
II. SCHEDULE OF COMPLIANCE
The stormwater management system shall be constructed in it's entirety,
vegetated and operational for its intended use prior to the construction of any
built -upon surface.
2. During construction, erosion shall be kept to a minimum and any eroded areas of
the system will be repaired immediately.
3. The permittee shall at all times provide the operation and maintenance
necessary to assure the permitted stormwater system functions at optimum
efficiency. The approved Operation and Maintenance Plan must be followed in
its entirety and maintenance must occur at the scheduled intervals including, but
not limited to:
a. Semiannual scheduled inspections (every 6 months).
b. Sediment removal.
C. Mowing and revegetation of 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.
g. Access to the outlet structure must be available at all times.
4. Records of maintenance activities must be kept '-and made available upon
request to authorized personnel of DWQ. The records will indicate the date,
activity, name of person performing the work and what actions were taken.
5. Decorative spray fountains will not be allowed in the stormwater treatment
system.
6. The facilities shall be constructed as shown on the approved plans. This permit
shall become voidable unless the facilities are constructed in accordance with
the conditions of this permit, the approved plans and specifications, and other
supporting data.
7. Upon completion of construction, prior to issuance of a Certificate of Occupancy,
and prior to operation of this permitted facility, a certification must be received
from an appropriate designer for the system installed certifying that the permitted
facility has been installed in accordance with this permit, the approved plans and
specifications, and other supporting documentation. Any deviations from the
approved plans and specifications must be noted on the Certification. A
modification may be required for those deviations.
8. If the stormwater system was'used as an Erosion Control device, it must be
restored to design condition prior to operation as a stormwater treatment device,
and prior to occupancy of the facility.
9. The permittee shall submit final site layout and grading plans for any permitted
future areas shown on the approved plans, prior to construction. If the proposed
BUA exceeds the amount permitted under this permit, a modification to the
permit must be submitted and approved prior to construction.
10.1 A copy of the approved plans and specifications shall be maintained on file by
the Permittee for a minimum of ten years from the date of the completion of
construction.
Page 4 of 8

State Stormwater Management Systems
Permit No. SW8 020532
11. The permittee shall submit to the Director and shall have received approval for
revised plans, specifications, and calculations prior to construction, for any
modification to the approved plans, including, but not limited to, those listed
below:
a. Any revision to any item shown on the approved plans, including the
stormwater management measures, built -upon area, details, etc.
b. Project name Change.
c. Transfer of ownership.
d. Redesign or addition to the approved amount of built -upon area or to the
drainage area.
e. Further subdivision, acquisition, or sale of the project area. The project
area is defined as all property owned by the permittee, for which
Sedimentation and Erosion Control Plan approval or a CAMA Major
permit was sought.
f. Filling in, altering, or piping of any vegetative conveyance shown on the
approved plan.
12. The permittee must maintain compliance with the proposed built -upon area and
ensure that the -runoff from all the built -upon is directed into the permitted
system.
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.
III. GENERAL CONDITIONS
1. This permit is not transferable to anyone except after notice to and approval by
the Director. 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 transfer request
must be submitted to the Division of Water Quality accompanied by an
application fee, documentation from the parties involved, and other supporting
materials as may be appropriate. The approval of this request will be considered
on its merits and may or may not be approved. Responsibility for compliance
with all permit conditions remains with the Permittee until such time as the
Division approves the formal permit request.
2. Failure to abide by the conditions and limitations contained in this permit may
subject the Permittee to enforcement action by the Division of Water Quality, in
accordance with North Carolina General Statute 143-215.6A to 143-215.6C.
3. The issuance of this permit does not preclude the Permittee from complying with
any and all statutes, rules, regulations, or ordinances which may be imposed by
other government agencies (local, state, and federal) which have jurisdiction.
4. In the event that the facilities fail to perform satisfactorily, including the creation
of nuisance conditions, the Permittee shall take immediate corrective action,
including those as may be required by this Division, such as the construction of
additional or replacement stormwater management systems.
5. The permittee grants DENR Staff permission to enter the property during normal
business hours for the purpose of inspecting all components of the permitted
stormwater management facility.
Page 5 of 8

State Stormwater Management Systems
Permit No. SW8 020532
# 6. The permit may be modified, revoked and reissued or terminated for cause. The
I ding 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.
Permit modified and reissued this the 31 st day of October, 2003.
NORTH CAROLINA ENVIRONMENTAL MANAGEMENT COMMISSION
Alan W. Klimek, P.E., Director
4� Division of Water Quality
By Authority of the Environmental Management Commission
Page 6 of 8

State Stormwater Management Systems
Permit No. SW8 020532
HQ Armory
Stormwater Permit No. SW8 020532
Onslow County
Designer's Certification
I, , as a duly registered
in the State of North Carolina, having been authorized to observe (periodically/weekly/
full time) the construction of the project,
(Project)
for (Project Owner) hereby state that, to the
best of my abilities, due care and diligence was used in the observation of the project
construction such that the construction was observed to be built within substantial
compliance and intent of the approved plans and specifications.
The checklist of items on page 2 of this form is included in the Certification.
Noted deviations from approved plans and specification:
Signature
Registration Number
Date
SEAL
Certification Requirements:
Page 7 of 8

State Stormwater Management Systems
Permit No. SW8 020532
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. The outlet/bypass structure elevations are per the approved plan.
5. The outlet structure is located per the approved plans.
6. Trash rack is provided on the outlet/bypass structure.
7. All slopes are grassed with permanent vegetation.
8. Vegetated slopes are no steeper than 3:1.
9. The inlets are located per the approved plans and do not cause short-
circuiting of the system.
10. The permitted amounts of surface area and/or volume have been
provided.
11. Required drawdown devices are correctly sized per the approved plans.
12. All required design depths are provided.
13. All required parts of the system are provided,. such as a vegetated shelf,
and a forebay.
14. The overall dimensions of the system, as shown on the approved plans,
are provided.
cc: NCDENR-DWQ Regional Office
Onslow County Building Inspections
Page 8of8

�FFIGEAUSE gONLY " s
Date Received
Fee Paid
Permit Number
.S�
`�Za `= 00i
0Sr 3
1
State of North Carolina
Department of Environment and Natural Resources
Division- of. Water Quality
STORMWATER MANAGEMENT PERMIT APPLICATION FORM
This form may be photocopied for use as an original
I. GENERAL INFORMATION
1. Applicants name (specify the name of the corporation, individual, etc. who owns the project):
U.S. Marine Corps
2. Print Owner/Signing Official's name and title (person legally responsible for facility and compliance):
CDR S.R. Scanlan, Public Works Officer
3. Mailing Address for person listed in item 2 above:
1005 Michael Road
City: Camp Lejeune State: NC Zip: 28542-0004
Telephone Number: ( 910 } 4 51 - 2 5 81
4. Project Name (subdivision, facility, or establishment name - should be consistent with project name on plans,
specifications, letters, operation and maintenance agreements, etc.):
HQ Marine Armory
5. Location of Project (street address):
"H" Street
City: Camp Lejeune
County:
Onslow
6. Directions to project (from nearest major intersection):
0.05 miles southeast of the intersection of Holcomb Blvd. and
River Road and make a left on "H" Street.
7. Latitude: N 3 4° - 3 9. 6 3 2' Longitude: W 7 7° - 21 . 1 1 1' of project
8. Contact person who can answer questions about the project:
Name: Kevin Avo l i s , P.E. Telephone Number: (__2 5 2
II. PERMIT INFORMATION:
1. Specify whether project is (check one): x New Renewal
633-0068
Modification
Form S%U-101 Version 3.99 Page I of 4

2. If this application is being submitted as the result of a renewal or modification to an existing permit, list the
existing permit number 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 NPDES Stormwater
Information on required state permits can be obtained by contacting the Customer Service Center at
1-877-623-6748.
III. PROJECT INFORMATION
1. In the space provided below, summarize how stormwater will be treated. Also attach a detailed narrative
(one to two pages) describing stormwater management for the project.
Runoff from new pavement, gravel areas and the building will be
collected by curb inlets and will be routed to the wet detention
basin. See attachment No.1 for additional information.
2. Stormwater runoff from this. project drains to the
New
River basin,
3. Total Project Area: 0.75 acres
4. Project Built Upon Area:
77.6 %
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.
�D
'"Basin Information '�
i.-
�= rama eArea 1��
g e,....:��E
� F s%S _ a �¢,.. _sf-'°-^K_ . _�d�.- z �
ramage:AzeaY�
Receiving Stream Name
UT to New River
Receiving Stream Class
l"� Qs
Drainage Area
38,018 SF
Existing Impervious* Area
5,328 SF
Proposed Impervious*Area
241178 SF
% Impervious* Area (total)
7 7. 6 %
Impervious°..'Surface Area €d�
--
t Drainage Area 1 n 5�
-. .vl.r.-6.. : � ... i-� -�
_r t Drainae Area.2 •Prt
�
On -site Buildings
7,352 SF
On -site Streets
0 SF
On -site Parking
972 SF
On -site Sidewalks
1 000 SF
Other on -site
14,854 SF (gravel)
Off -site
5,328 SF
Total: 29, 506 SF
Total:
" Impervious area is defined as the built upon area including, but not limited to, buildings, roads, parking areas,
sidewalks, gravel areas. etc.
Form SVrU-101 Version 3.99 Page 2 of 4

7. How was the off -site impervious area listed above derived? Site Investigation
IV. DEED RESTRICTIONS AND PROTECTIVE COVENANTS
The following italicized deed restrictions and protective covenants are required to be recorded for all
subdivisions, outparcels and future development prior to the sale of any lot. If lot sizes vary significantly, a table
listing each lot number, size and the allowable built -upon area for each lot must be provided as an attachment.
The following covenants are intended to ensure ongoing compliance with state stormwater management permit number
as issued by the Division of Water Quality. These covenants may not be
changed or deleted without the consent of the State.
2. No more than 2 9 , 5 0 6 square feet of any lot shall be covered by structures or impervious materials.
Impervious materials include asphalt, gravel, concrete, brick, stone, slate or similar material but do not include wood
decking or the water surface of swimming pools.
3. Swales shall not be filled in, piped, or altered except as necessary to provide driveway crossings.
4. Built -upon area in excess of the permitted amount requires a state stormwater management permit modification prior to
construction.
5. All permitted runoff from outparcels or future 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
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 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
Form SWU-I07
Underground Infiltration Trench Supplement
Form SWU-108
Neuse River Basin Supplement
Form SWU-109
Innovative Best Management Practice Supplement
Form SWU-101 Version 3.99 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 Regional Office.
1. Please indicate that you have provided the following required information by initialing in the space provided
next to each item.
• Original and one copy of the Stormwater Management Permit Application Form
• One copy of the applicable Supplement Form(s) for each BMP
• Permit application processing fee of $420 (payable to NCDENR)
• Detailed narrative description of Stormwater treatment/management
• Two copies of plans and specifications, including:
- Development/Project name
- Engineer and firm
-Legend
- North arrow
- Scale
- Revision number & date
- Mean high water line
- Dimensioned property/project boundary
- Location map with named streets or NCSR numbers
- Original contours, proposed contours, spot elevations, finished floor elevations
- Details of roads, drainage features, collection systems, and 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):
Mailing Address: P.O. Box 15564
City: New Bern
Phone: ( 252 ) 633-0068
VIII_ APPLICANT'S CERTIFICATION
Avolis Engineering, PA
State: NC Zip: 28561
Fax: ( 252 1 633-6507
I, (print or type name ofperson listed in General Information, item 2) CDR S.R. Scanlan
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. , f
Signature:
Date: 2")� .1qA x' CZ
Form SWU-101 Version 3.99 Page 4 of 4

Permit No. 5WY O ZO 53Z
(to be provided by DWQ)
State of North Carolina
Department of Environment and Natural Resources
Division of Water Quality
STORMWATER MANAGEMENT PERMIT APPLICATION FORM
WET DETENTION BASIN SUPPLEMENT
This form may be photocopied for use as an original
DWQ Stormwater Management Plan Review:
A complete stormwater management plan submittal includes an application form, a wet detention basin
supplement for each basin, design calculations, and plans and specifications showing all basin and outlet
structure details.
I. PROJECT INFORMATION
Project Name: HQ Marine Armory
Contact Person: Kevin Avo 1 i s , P.E. Phone Number: (2 5 2
For projects with multiple basins, specify which basin this worksheet applies to:
elevations
Basin Bottom Elevation
2.59
ft.
Permanent Pool Elevation
6.56
ft
Temporary Pool Elevation
7.26
ft.
areas
Permanent Pool Surface Area
2, 799
sq. ft.
Drainage Area
0.873
ac.
Impervious Area
0.677
ac.
volumes
4,049
Permanent Pool Volume
cu. ft.
Temporary Pool Volume
2,672
cu. ft.
Forebay Volume
953
cu. ft.
Other parameters
SA/DAI
6.78%
Diameter of Orifice
1
in.
Design Rainfall
1
in.
Design TSS Removal 2
90
%
633-0068
(floor of the basin) ( 0.79m )
(elevation of the orifice) (2. Om)
(elevation of the discharge structure overflow) (2.214m)
(water surface area at the orifice elevation) (2 6 0m2) .
(on -site and off -site drainage to the basin) (38,018 SF)
(on -site and off -site drainage to the basin) (29,506 SF)
(combined volume of main basin and forebay) I 1 14. 6 6m3 }
(volume detained above the permanent pool) (75.7m3 }
(approximately 20% of total volume) ( 27. Ord )
(surface area to drainage area ratio from DWQ table)
(2 to 5 day temporary pool draw -down required)
(minimum 85% required)
Form 5WU-102 Rev 3.99 Page 1 of 4

Footnotes:
1 When using the Division SAIDA tables, the correct SAIDA ratio for permanent pool sizing should be computed based upon the
actual impervious % and permanent pool depth. Linear interpolation should be employed to determine the correct value for non-
standard table entries.
2 In the 20 coastal counties, the requirement for a vegetative filter may be waived if the wet detention basin is designed to provide
90% TSS removal. The NCDENR BMP manual provides design tables for both 85%TSS removal and 90% TSS removal.
II. REQUIRED ITEMS CHECKLIST
The following checklist outlines design requirements per the Stormwater Best Management Practices Manual
(N.C. Department of Environment, Health and Natural Resources, February 1999) and Administrative Code
Section: 15 A NCAC 2H .1008.
Initial in the space provided to indicate the following design requirements have been met and supporting
documentation is attached. If the applicant has designated an agent in the Stormwater Management Permit
Application Form, the agent may initial below. If a requirement has not been met, attach justification.
Is
a. The permanent pool depth is between 3 and 6 feet (required minimum of 3 feet).
b. The forebay volume is approximately equal to 20% of the basin volume.
c. The temporary pool controls runoff from the design storm event.
d. The temporary pool draws down in 2 to 5 days.
e. If required, a 30-foot vegetative filter is provided at the outlet (include non -erosive flow
calculations)
f. The basin length to width ratio is greater than 3:1.
g. The basin side slopes above the permanent pool are no steeper than 3:1.
h. A submerged and vegetated perimeter shelf with a slope of 6:I or less (show detail).
i. Vegetative cover above the permanent pool elevation is specified.
j. A trash rack or similar device is provided for both the overflow and orifice.
k. A recorded drainage easement is provided for each basin including access to nearest right-
of-way.
1. If the basin is used for sediment and erosion control during construction, clean out of the
basin is specified prior to use as a wet detention basin.
in. A mechanism is specified which will drain the basin for maintenance or an emergency.
III. WET DETENTION BASIN OPERATION AND MAINTENANCE AGREEMENT
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) 0 does redoes not incorporate a vegetated filter at the outlet.
This system (check one) 0 does Acdoes not incorporate pretreatment other than a forebay.
Form SWU-102 Rev 3.99 Page 2 of 4

r
Maintenance activities shall be performed as follows:
1. After every significant runoff producing rainfall event and at least monthly:
a. Inspect the wet detention basin system for sediment accumulation, erosion, trash accumulation,
vegetated cover, and general condition.
b. Check and clear the orifice of any obstructions such that drawdown of the temporary pool occurs
within 2 to 5 days as designed.
2. Repair eroded areas immediately, re -seed as necessary to maintain good vegetative cover, mow vegetative
cover to maintain a maximum height of six inches, and remove trash as needed.
3. Inspect and repair the collection system (i.e. catch basins, piping, swales, riprap, etc.) quarterly to
maintain proper functioning.
4. Remove accumulated sediment from the wet detention basin system semi-annually or when depth is
reduced to 75% of the original design depth {see diagram below). Removed sediment shall be disposed
of in an appropriate manner and shall be handled in a manner that will not adversely impact water quality
(i.e. stockpiling near a wet detention basin or stream, etc.).
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 3 feet in the main pond, the sediment shall be removed.
When the permanent pool depth reads 3 feet in the forebay, the sediment shall be renio-ved.
BASIN DIAGRAM
(fill in the blank)
Permanent Pool Elevation 6. 5 6 y r—
Sediment Re oval EL 3 . 5 9 ' 175 o t
-------------- • - Sediment Removal Elevation 3 ' S 9 7557,
Bottom Eie ation 2 . 5 9 ' %--------------------------------�----- ------f_25%
------
Bottom Elevation 2 . 59
FOREBAY MAIN POND
5. Remove cattails and other indigenous wetland plants when they cover 50% of the basin surface. These
plants shall be encouraged to grow along the vegetated shelf and forebay berm.
6. If the basin must be drained for an emergency or to perform maintenance, the flushing of sediment
through the emergency drain shall be minimized to the maximum extent practical.
Form SWU-102 Rev 3.99 Page 3 of 4

7. All components of the wet detention basin system shall be maintained in good working order.
I acknowledge and agree by my signature below that I am responsible for the performance of the seven
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.
Printname: S.R. Scanlan
Title: Commander / CEC / USN; Public Worker Officer
Address: _ 1005 Michael Road, Camp r.P3Pnna, NC
Phone: (91 0) 4 51—
Signature:
Date: 2 Y 1`44Y 02
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, 1E,Eu -1 �y NDy a Notary Public for the State of i eA 2c�L, yU
County of _ ONSLo� , do hereby certify that er
personally appeared before me this o2 day of r-t , and acknowledge the due
execution of the forgoing wet detention basin maintenance requirements. Witness my hand and official seal,
SEAL
My commission expires �`,
Form SWU-102 Rev 3.99 Page 4 of 4

Attachment Ng...I
Stormwater Management Permit Application
HQ Marine Armory Stormwater Management Narrative
All of the 0.75 acre HQ Marine Armory site impervious area runoff will be captured by this
project and will be routed to the front of a single wet detention basin. 0.124 acres of off -site
impervious area runoff will be captured and treated by this project. The basin incorporates a
forebay and perimeter shelf. The basin has a permanent pool depth of four feet and is designed
for 90% TSS removal. The 1-inch orifice results in a 1-inch storm draw down period of 60 hours
(2.5 days). The pond length to width ratio is greater than three. A permanent pool depth is
specified in the application where sediment removal would be required.

Permit No. ,SW 8 UZ 6S? L ' R 1
Date: 0 ZY 00 L- 4ti_
Z044
Engineer Certification
I'U 4d hokeAW, as a duly registered Professional Engineer in the State of North
Carolina, I)aving been authorized to observe periodically the construction of the
Project H Q /9, Camp Lejeune, North Carolina for the
Permittee hereby state that to the best of my abilities, due care and diligence was used in
the observation of the construction such that the construction was observed to be built
within substantial compliance and intent of the approved plans and specifications.
Noted deviations form approved plans and specifications:
..uOOO.._
Signature:
Registration No.
Date: �3 s