SW7090710_CURRENT PERMIT_20150728

STORMWATER DIVISION CODING SHEET
POST -CONSTRUCTION PERMITS
PERMIT NO.
SW 7O�O�la
DOC TYPE
CURRENT PERMIT
APPROVED PLANS
❑ HISTORICAL FILE
❑ COMPLIANCE EVALUATION INSPECTION
DOC DATE
YYYYM M DD

no
A�
NC®ENR
North Carolina Department of Environment and Natural Resources
Pat McCrory
Governor
Mr. George Radford,
MCAS. Cherry Point
PSC Box 8006
July 28, 2015
Environmental Affairs Officer
Cherry Point, NC 28533
Subject: Stormwater Permit No. SW7090710 MOD#2
Child Development Center, MCAS Cherry Point
High Density Commercial Wet Pond Project
Craven County
Dear Mr. Radford:
Don Van der Vaart
Secretary
The Washington Regional Office received a complete Stormwater Management Permit
Modification Application for the Child Development Center, MCAS Cherry Point, NC on
July 21, 2015. 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
21-1.1000. We are forwarding Permit No. SW7090710 Modification#2 dated July 28, 2015,
for the construction of the subject project. This Modification is to add the improvements to
building 4298 to the wet detention basin constructed for the new Child Development
Center.
This permit shall be effective from the date of issuance until December 31, 2021, shall void
permit SW7090710 MOD issued on March 30, 2011 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, 6714 Mail Service Center, Raleigh, NC 27699-6714.
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 me at [phone].
Sincerely,
Samir Dumpor, PE
Environmental Engineer
AH/ sd: K:\SD\Permits-Wet Pond\SW7090710Modification#2
Division of Energy, Mineral, and Land Resources . Land Quality Section
Washington Regional Office
943 Washington Square Mall, Washington, North Carolina 27889 • Phone: [phone]/ FAX: [phone]
Internet: htto://oortal.ncdenr.orq/Web/Ir/land-quality
An Equal Opportunity 1 Affirmative Action Employer— 50% Recycled \ 10% Post Consumer Paper

cc: Kevin Avolis, PE, Avolis Engineering, PA
Craven County Building Inspections
Washington Regional Office

STATE OF NORTH CAROLINA
DEPARTMENT OF ENVIRONMENT AND NATURAL RESOURCES
DIVISION OF ENERGY, MINERAL, AND LAND RESOURCES
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
MCAS Cherry Point
Child Development Center, WAS Cherry Point
Havelock, Craven 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 Energy,
Mineral, and Land Resources (Division) and considered a part of this permit.
This permit shall be effective from the date of issuance until December 31, 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 1.7 of this permit. The stormwater control has been
designed to handle the runoff from 130,354 square feet of impervious area.
3. The tract will be limited to the amount of built -upon area indicated in Section I. 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 built -upon areas associated with this project shall be located at least 50 feet
landward of all perennial and intermittent surface waters.
7. The following design criteria have been provided in the wet detention pond and
must be maintained at design condition:
Page 2 of 7

a. Drainage Area, ftZ:
b. Total Impervious Surfaces, ftZ:
C. Design Storm, inches:
d. Pond Depth, feet:
e. TSS removal efficiency:
f. Permanent Pool Elevation, FMSL:
g. Permanent Pool required surface area, ftZ.
h. Permanent Pool ProvidedSurface Area, ft2:
i. Required Storage Volume a�Temp. Pool, ft3:
j. Provided Storage Volume, ft
k. Temporary Storage Elevation, FMSL:
I. Predevelopment 1 year 24 hour:
M. Post development 1 year 24 hour:
n. Controlling Orifice:
o. Permitted Forebay Volume, ft3:
P. Fountain Horsepower, HP
q. Receiving Stream/River Basin:
r. Stream Index Number:
S. Classification of Water Body:
II. SCHEDULE OF COMPLIANCE
12
383,228
130,354
1.50
4.0 average
90%
19.00
11,573
11,834
17,782
22,668
20.15
13.20 ft3/sec
14.90 ft3/sec
2.25"0 pipe
10,783
1/6, one sixth hp
Sandy Branch / Neuse
27-112-2-3
"C; Sw, NSW"
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.
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 time 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 re -vegetation of slopes and the vegetated filter strip.
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, level
spreader, filter strip, catch basins and piping.
p. Access to the outlet structure must be available at all times.
Records of maintenance activities must be kept for each permitted BMP. The
records will indicate the date, activity, name of person performing the work and
what actions were taken.
The permittee shall submit to the Division an annual summary report of the
maintenance inspection records for each BMP. The report shall summarize the
inspection dates, results of the inspections, and the maintenance work
performed at each inspection.
Access to the stormwater facilities shall be maintained via appropriate
easements at all times.
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.
Page 3 of 7

b. Separated units, where the nozzle, pump and intake are connected by
tubing, may be used only if they draw water from the surface in the
deepest part of the pond.
c. The falling water from the fountain must be centered in the pond, away
from the shoreline.
d. The maximum horsepower for a fountain in this pond is one sixth (1/6)
horsepower.
8. The facilities shall be constructed as shown on the approved plans. This permit
shall become void unless the facilities are constructed in accordance with the
conditions of this permit, the approved plans and specifications, and other
supporting data.
9. 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.
10. 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.
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, 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.
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. The permittee shall submit final site layout and grading plans for any permitted
future areas shown on the approved plans, prior to construction.
14. A copy of the approved plans and specifications shall be maintained on file by
the Permittee at all times.
III. GENERAL CONDITIONS
This permit is not transferable except after notice to and approval by the Director.
In the event of a change of ownership, or a name change, the permittee must
Page 4 of 7

submit a completed Name/Ownership Change form, to the Division, signed by
both parties, and accompanied by supporting documentation as listed on page 2
of the form. The project must be in good standing with the Division. The approval
of this request will be considered on its merits and may or may not be approved.
2. The permittee is responsible for compliance with all permit conditions until such
time as the Division approves the transfer request.
3. Failure to abide by the conditions and limitations contained in this permit may
subject the Permittee to enforcement action by the Division, in accordance with
North Carolina General Statute 143-215.6A to 143-215.6C.
4. 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.
5. 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.
6. 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.
7. The permit issued shall continue in force and effect until revoked or terminated.
The permit may be modified, revoked and reissued or terminated for cause. The
filing of a request for a permit modification, revocation and re -issuance or
termination does not stay any permit condition.
8. 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.
9. Approved plans and specifications for this project are incorporated by reference
and are enforceable parts of the permit.
10. The issuance of this permit does not prohibit the Director from reopening and
modifying the permit, revoking and reissuing the permit, or terminating the permit
as allowed by the laws, rules and regulations contained in Title 15A NCAC
2H.1000, and NCGS 143-215.1 et.al.
11. The permittee shall notify the Division of any name, ownership or mailing
address changes at least 30 days prior to making such changes.
12. This permit shall be effective from the date of issuance until December 31, 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.
Permit issued this the 28th day of July, 2015.
NORTH CARbL ENVIRONIY j4TAL MANAGEMENT COMMISSION
for
Coleen H. Sullins, Director
Division of Water Quality
By Authority of the Environmental Management Commission
Stormwater Permit No. SW7090710 Modification#2
Page 5 of 7

Child Development Center, MCAS Cherry Point, NC
Stormwater Permit No. SW7090710 Modification#2
Craven 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
Page 6 of 7

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-DEMLR Washington Regional Office
Craven County Building Inspections
Page 7 of 7

I�
L11 WaM
NCDENR
North Carolina Department of Environment and Natural Resources
Beverly Eaves Perdue
Governor
Division of Water Quality
Coleen H. Sullins
Director
July 31, 2009
Dee Freeman
Mr. George Radford, EA Officer Ts loem, ��1�^e� a 1 Mu c� 30� zC-r/
MCAS Cherry Point, EAD
Bldg. 4223, Access Rd.
Cherry Point, NC 28533
Subject: Stormwater Permit No. SW7090710
Child Development Center, MICAS Cherry Point
High Density Commercial Wet Pond Protect
Craven County
Dear Mr. Radford: '
The Washington Regional Office received a complete Stormwater Management Permit
Application for Engineering Product Support Facility, MCAS Cherry Point, NC on July 22,
2009. Staff review of the plans and specifications has determined that the project, as
proposed, will comply with the Stormwater Regulations set forth in Session Law 2008-211 and
Title 15A NCAC 2H.1000. We are forwarding Permit No. SW7090710 dated July 31, 2009, for
the construction of the subject project.
This permit shall be effective from the date of issuance until July 31, 2019, 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 Samir Dumpor, or me at [phone].
ATSc,erely,od e
Regional Supervisor
Surface Water Protection Section
AH/ sv: S:\WQS\STORMWATER\PERMIT\SW7090608
cc: Kevin Avolis, PE, Avolis Engineering, PA
WCaven County Building Inspections
ashington Regional Office
Central Files
North Carolina Division of Water Quality Internet: svNv c ncavaterggolity_om
943 Washington Square Mall Phone: [phone]�TOne
Washington, NC 27889 FAX [phone] orth'Carofina
An Equal Opportunity/Af(irmative Action Employer- 50%Recycler1110% Post Consumer Paper Nat,/r„ &

State stormwater Management systems
Permit No. SW7090710
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
MCAS Cherry Point
Child Development Center, MCAS Cherry Point
Havelock, Craven County
FOR THE
construction, operation and maintenance of a wet detention pond in compliance with
the provisions of Session Law 2008-211 and 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 31, 2019, and shall be
subject to the following specified conditions and limitations:
I. DESIGN STANDARDS
This permit is effective only with respect to the nature and volume of stormwater
described in the application and other supporting data.
This stormwater system has been approved for the management of stormwater
runoff as described in Section 1.7 of this permit. The stormwater control has been
designed to handle the runoff from 113,352 square feet of impervious area.
3. The tract will be limited to the amount of built -upon area indicated in Section I. 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.
The runoff from all built -upon area within the permitted drainage area of this
project must be directed into the permitted stormwater control system.
Page 2 of 8

uy. . Vy. ..
Permit No. SW7090710
is
VA
The built -upon areas associated with this project shall be located at least 50 feet
landward of all perennial and intermittent surface waters.
The following design criteria have been provided in the wet detention pond and
must be maintained at design condition:
a. Drainage Area, acres:
b. Total Impervious Surfaces, ft2:
C. Design Storm, inches:
d. Pond Depth, feet:
e. TSS removal efficiency:
f. Permanent Pool Elevation, FINIl
g. Permanent Pool Surface Area, ft
h. Permitted Storage Volume, ft :
i. Temporary Storage Elevation, FMSL:
j. Predevelopment 1 year 24 hour:
k. Post development 1 year 24 hour:
I. Controlling Orifice:
M. Permitted Forebay Volume, ft3:
n. Fountain Horsepower, HP
o. Receiving Stream/River Basin:
P. Stream Index Number:
q. Classification of Water Body:
II. SCHEDULE OF COMPLIANCE
7.94
113,352
1.50
3.8 average
90%
19.00
11,834
47,267
22.00
15.67 ft3/sec
0.31 ft /sec
2.25"0 pipe
10,783
1/6, one sixth hp
Sandy Branch / Neuse
27-112-2-3
"C; Sw, NSW"
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.
The permittee shall at all time 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 re -vegetation of slopes and the vegetated filter strip.
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, level
spreader, filter strip, catch basins and piping.
g. Access to the outlet structure must be available at all times.
4. Records of maintenance activities must be kept for each permitted BMP. The
records will indicate the date, activity, name of person performing the work and
what actions were taken.
5. The permittee shall submit to the Division of Water Quality an annual summary
report of the maintenance inspection records for each BMP. The report shall
summarize the inspection dates, results of the inspections, and the maintenance
work performed at each inspection.
Page 3 of 8

State Stormwater Management Systems
Permit No. SW7090710
91
Access to the stormwater facilities shall be maintained via appropriate
easements at all times.
Decorative spray fountains will be allowed in the stormwater treatment system,
subject to the following criteria:
a. The fountain must draw its water from less than 2' below the permanent
pool surface.
b. Separated units, where the nozzle, pump and intake are connected by
tubing, may be used only if they draw water from the surface in the
deepest part of the pond.
c. The falling water from the fountain must be centered in the pond, away
from the shoreline.
d. The maximum horsepower for a fountain in this pond is one sixth (1/6)
horsepower.
8. The facilities shall be constructed as shown on the approved plans. This permit
shall become void unless the facilities are constructed in accordance with the
conditions of this permit, the approved plans and specifications, and other
supporting data.
3. 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.
10. 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.
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, 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.
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. The permittee shall submit final site layout and grading plans for any permitted
future areas shown on the approved plans, prior to construction.
Page 4 of 8

i iviai iaycn iciR vYaIVI Its
Permit No. SW7090710
14. A copy of the approved plans and specifications shall be maintained on file by
the Permittee at all times.
III. GENERAL CONDITIONS
This permit is not transferable except after notice to and approval by the Director.
In the event of a change of ownership, or a name change, the permittee must
submit a completed Name/Ownership Change form, to the Division of Water
Quality, signed by both parties, and accompanied by supporting documentation
as listed on page 2 of the form. The project must be in good standing with the
Division. The approval of this request will be considered on its merits and may or
may not be approved.
2. The permittee is responsible for compliance with all permit conditions until such
time as the Division approves the transfer request.
3. 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.
4. 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.
5. 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.
6. 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.
7. The permit issued shall continue in force and effect until revoked or terminated.
The permit may be modified, revoked and reissued or terminated for cause. The
filing of a request for a permit modification, revocation and re -issuance or
termination does not stay any permit condition.
8. 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.
9. Approved plans and specifications for this project are incorporated by reference
and are enforceable parts of the permit.
10. The issuance of this permit does not prohibit the Director from reopening and
modifying the permit, revoking and reissuing the permit, or terminating the permit
as allowed by the laws, rules and regulations contained in Session Law 2006-
246, Title 15A NCAC 2H.1000, and NCGS 143-215.1 et.al.
11. The permittee shall notify the Division of any name, ownership or mailing
address changes at least 30 days prior to making such changes.
12. This permit shall be effective from the date of issuance until July 31, 2019.
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.
Page 5 of 8

State Stormwater Management Systems
Permit No. SW7090710
Permit issued this the 315' day of July, 2009.
-- — T COMMISSION
for
Division of Water Quality
By Authority of the Environmental Management Commission
Stormwater Permit No. SW7090710
Page 6 of 8

r management bystems
Permit No. SW7090710
Child Development Center, MCAS Cherry Point, NC
Stormwater Permit No. SW7090710
Craven 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
Page 7 of 8

State Stormwater Management Systems
Permit No. SW7090710
' 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. Traish 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
12. Reel uired 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. Thl required system dimensions are provided per the approved plans.
cc: NCDENR'i DWQ Washington Regional Office
Craven County Building Inspections

state 5tormwater Management Systems
Permit No. SW7090710-
n Child Development Cei. MCAS Cherry Point, NC —
'Stormwater Permit No. SW7090710
Craven Countyl
JAN 2 4 2011
Designer's Certification
I, John Kevin Avolis , 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,
Child Development Center
(Project)
for Cormanding Officer, MCAS Cherry, L 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
Nuibber
Date
20, 2011
SEAL
SM ,ISM Ij�:�1 rl
Page 7 of 8

orate wormwater management systems
Permit No. SW7090710
n
Permit issued this the 315t day of July, 2009.
NORTH CAROLINA ENVIRONMENTAL MANAGEMENT COMMISSION
/ —\` '- 'c�61[s` for
Coleen H. Sullins, irecto�
Division of Water Quality
By Authority of the Environmental Management Commission
Stormwater Permit No. SW7090710
n
Page 6 of 8

State Stormwater Management Systems
Permit No. SW7090710
''"Certification Requiremen—
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.
V 7. Trash rack is provided on the outlet/bypass structure.
t/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.
V 12. Required drawdown devices are correctly sized per the approved plans.
13. All required design depths are provided.
y/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 Washington Regional Office
Craven County Building Inspections
Page 8 of 8

AVOLIS ENGINEERING. P.A.
P.O. Box 15564 New Bern, North Carolina 28561 Office: 252.633.0068
January 20, 2011
Mr. Al Hodge
Regional Supervisor
Surface Water Protection Section
Washington Regional Office
943 Washington Square Mall
Washington, NC 27889
JAN 1 4 2011
RE: Engineer's Stormwater Certification — SW7090710
Child Development center, MCAS Cherry Point, Craven County, North Carolina
AE Project No. 10037
Dear Al:
Enclosed please find the Engineer's Stormwater Certification for the above -referenced project.
Should you have any questions relating to this matter or need any additional information or
assistance, please do not hesitate to call.
Sincerely,
volis, P.E.
Nident
Ruan Stewart — EAD, MCAS Cherry Point, North Carolina

EXPRESS
Permit No.
(to be provided by DWQ)
_ern
NCDENR
JUL 2 T2009
NC DENR
STORMWATER MANAGEMENT PERMIT APPLICATION FORM
401 CERTIFICATION APPLICATION FORM
WET DETENTION BASIN SUPPLEMENT
This form must be filled out, printed and submitted.
The Required Items Checklist (Part 111) must be printed, filled out and submitted along with all of the required information.
o2(DF W A TFgOG
h y
� r
o
I. PROJECT INFORMATION
Project name - Child Development Center- MCAS, Cherry Point, North Carolina
Contact person Kevin Avolis, PE
Phone number 252-633-0068
Date 15Jan-09
Drainage area number 1
Ill. DESIGN INFORMATION tr'
Drainage area
Impervious area, post -development
% impervious
Design rainfall depth
Storage Volume: Non-SAWaters
Minimum volume required
Volume provided
Storage Volume: SA Waters
1.5' runoff volume
Pre -development 1-yr, 24-hr runoff
Past -development 1-yr, 24-hr mnoff
Minimum volume required
Volume provided
Peak Flow Calculations
Is the prelpost control of the 1 yr 24hr storm peak flow required?
1-yr, 24-hr rainfall depth
Rational C, pre -development
Rational C, post -development
Rainfall intensity: 1-yr, 24-hr storm
Pre -development 1-yr, 24-hr peak flow
Post -development 1-yr, 24-hr peak flow
Pre/Post 1-yr, 24-hr peak flow control
Elevations
Temporary pool elevation
Permanent pool elevation
SHWT elevation (approx. at the perm. pool elevation)
Top of 1Oft vegetated shelf elevation
Bottom of 1Oft vegetated shelf elevation
Sediment cleanout, top elevation (bottom of pond)
Sediment cleanout, bottom elevation
Sediment storage provided
Is there additional volume stored above the state -required temp. pool?
Elevation of the top of the additional volume
346,070 e V
113,352 a ✓✓
32.75 % /
1.5 in ✓
14,915 it' y OK
47,267 ffa
OK, volume provided is equal to or in excess of volume required.
ft3 ,
ft3
ft3
0 ft3
ft3
Y (Y or N)
in
0.30 (uni8ess)
0.50 (unidess)
3.89 irdhr OK
15.67 ftalaec
0.31 ft"lsec
-15.36 fta/cnr.
22.00 fmsl
19.00 fmsl
19.00 fmsl
19.50 fmsl
18.50 firms) Data not needed for calculation option #1, but OK if provided.
13.00 fmsl
12.00 fmsl Data not needed for calculation option #1, but OK if provided.
1.00 it
Y (Y or N)
22.0 fmsl OK
Form SW401-Wet Detention Basin-Rev.5 Paris 1.811. Design Summary, Page 1 of 2

Permit No.
(ro be provided by DWO)
II. DESIGN INFORMATION -
Surface Areas
Area, temporary pool
Area REQUIRED, permanent pool
SAIDA ratio
Area PROVIDED, permanent pool, A� _md
Area, bottom of 10ft vegetated shelf, A,..,
Area, sediment cleanout, top elevation (bottom of pond), A..d
Volumes
Volume, temporary pool
Volume, permanent pool, V. .
Volume, forebay (sum of forebays if more than one forebay)
Forebay %of permanent pool volume
SAIDA Table Data
Design TSS removal
Coastal SAIDA Table Used?
Mountain/Piedmont SAIDA Table Used?
SAIDA ratio
Average depth (used in SAIDA table):
Calculation option 1 used? (See Figure 10-2b)
Volume, permanent pool, V,_,,
Area provided, permanent pool, A..
Average depth calculated
Average depth used in SAIDA, d.„ (Round to nearest 0.511)
Calculation option 2 used? (See Figure 10-2b)
Area provided, permanent pool, A._,,
Area, bottom of 10ft vegetated shelf, Aso, sr�
Area, sediment cleanoul, lop elevation (bottom of pond), A�,_,a
'Depth' (distance b/w bottom of 10ft shelf and top of sediment)
Average depth calculated
Average depth used in SAIDA, dn., (Round to nearest 0.511)
Drawdown Calculations
Drawdown through office?
Diameter of onfce (if circular)
Area of orifice (if -non -circular)
Coefficient of discharge (CD)
Driving head (Ho)
Drawdown through weir?
Weir type
Coefficient of discharge (C„.)
Length of weir (L)
Driving head (H)
Pre -development 1-yr, 24-hr peak flow
Post -development 1-yr, 24-hr peak flow
Storage volume discharge rate (through discharge orifice or weir)
Storage volume drawdown time
18,321 ft2 /
11,351 ft'
3.28 (unittess)
11,834 ftv OK
9,519 ft
5,075 f
47,267 ft3
OK
45,043 ft3
10,783 ft3
23.9%%
Insufficient forebay volume.
90 %
Y (Y or N)
N (Y or N)
V
3.28 (unitless)
Y (Y or N)
45,043 ft' OK
11,834 el OK
3.80 It V OK
3.8It OK
N (Y or N)
fir'
fir
ft�
Y (Y or N)
2.25 in
in
0.60 (unidess)
1.00 8
N (Y or N)
(unidess)
(unifless)
If
It
15.67 113lsec OK
0.31 ft3lsec OK
0.23 ft3lsec
4:00 days OK, draws down in 2-5 days.
OK, drewdown time is correct.
Additional Information
Vegetated side slopes
3 :1
OK
Vegetated shelf slope
10 :1
OK
Vegetated shelf width
10.0 It
OK
Length of towpath to width ratio
3 :1
OK
Length to width ratio
3.0 :1
OK
Trash rack for overflow & entice?
Y (Y or N)
OK
Freeboard provided
2.0 It
OK
Vegetated filter provided?
N (Y or N)
OK
Recorded drainage easement provided?
Y (Y or N)
OK
Capures all runoff at ultimate build -out?
Y (Y or N)
OK
Drain mechanism for maintenance or emergencies
Pump
Forth SW4e1-Wet Detention Basin-Rev.5
Parts I. & U. Design Summary, Page 2 of 2

Permit
fto be provided by DWQ)
III. REQUIRED ITEMS CHECKLIST
Please indicate the page or plan sheet numbers where the supporting documentation can be found. An incomplete submittal package will
result in a request for additional information. This will delay final 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, attach justification.
Pagel Plan
Initials
Sheet No.
C5
1. Plans (1" - 50' or larger) of the entire site showing:
- Design at ultimate build -out,
- Off -site drainage (if applicable),
- Delineated drainage basins (include Rational C coefficient per basin),
- Basin dimensions,
- Pretreatment system,
- High flow bypass system,
- Maintenance access,
- Proposed drainage easement and public right of way (ROW),
- Overflow device, and
- Boundaries of drainage easement.
/
a
C6
2. Partial plan (1" = 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 pond with hardened emergency spillway,
- Basin cross-section,
- Vegetation specification for planting shelf, and
C7
- Filter strip.
3. Section view of the wet detention basin (1" = 20' or larger) showing:
- Side slopes, 3:1 or lower,
- Pretreatment and treatment areas, and
- Inlet and outlet structures.
C5
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.
C7
5. A table of elevations, areas, incremental volumes & accumulated volumes for overall pond and for Forebay,
to verify volume provided.
�✓
C5
6. A construction sequence that shows how the wet detention basin will be protected from sediment until the
entire drainage area is stabilized.
X
7. The supporting calculations.
X
8. A copy of the signed and notarized operation and maintenance (0&M) agreement.
NIA
9. A copy of the deed restrictions (if required).
_ X 10. A soils report that is based upon an actual field investigation, soil borings, and infiltration tests. County
soil maps are not an acceptable source of soils information.
Form SW401-Wet Detention Basin-Rev.5 Part III. Required Items Checklist, Page 1 of 1

s
STORMWATER NARRATIVE
Child Development Center
Marine Corps Air Station, Cherry Point
Craven County, North Carolina
This project consists of the development of a new Child Development Center onboard Marine
Corps Air Station, Cherry Point in Havelock, Craven County, North Carolina. The project site
covers a total area of 346,070 square feet, 7.94 acres. The site was formerly developed as a
single-family military housing complex. The housing units have been demolished. The
remaining utility services and paved road network will be demolished or modified to
accommodate the new Child Development Center.
It is proposed that the Child Development Center be constructed in phases. The extent of all
phases of construction are indicated on the project plans. In addition to the Child Development
Center, traffic circulation areas will be constructed around the Child Development Center.
The construction of this new facility will result in a High Density Development necessitating the
need for an engineered stormwater system. It is proposed that a stormwater retention pond be .
constructed on the project site in order to receive and treat stormwater runoff from the project
limits.
Specifically, it is proposed that a total of 113,352 square feet, 2.60 acres of impermeable surfaces
be constructed within the project limits yielding a built -upon area of 32.8%. The stormwater
retention pond was sized for 90% TSS removal and will discharge to an existing vegetated swale
network which ultimately discharges to Sandy Branch, a tributary to Slocum Creek. Sandy
Branch has a surface water classification of C, Sw, NSW and a stream index of 27-112-2-3.
No wetland areas or Neuse Riparian Buffer areas are located within the project limits.
The proposed stormwater collection and treatment system fully complies with the Coastal
Stormwater Permitting Regulations.

EXPRESS' Penn it Number:
(to be provided by DWQ)
JUL 222009 Drainage Area Number: 1
Wet Detention Basin Operation and Maintenance Agreement
NC ®ENR
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 I 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 O&M-Rev.4 Page 1 of 1

Permit Number:
(to be provided by DWQ)
Drainage Area Number: 1
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 2 of 2

Permit Number:
(to be provided by DWQ)
Drainage Area Number: 1
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 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 6 feet in the main pond, the sediment
shall be removed.
When the permanent pool depth reads 6 feet in the forebay, the sediment shall
be removed.
Sediment Removal
Bottom
13.0
---------------
FOREBAY
BASIN DIAGRAM
(fill in the blankv)
Ift Min.
Sediment
Storage
i
Permanent Pool Elevation 19.0
Sediment Removal --
Elevation 13.0 -------------- Volum¢
------------------------ ------/
Bottom Elevation 12.0 1-ft M4i
MAIN POND
Storage
Form SW401-Wet Detention Basin O&M-Rev.4
Page 3 of 3

Permit Number:
(to be provided by DWQ)
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.
Project name: Child Development Center Contract No. N40085-06-D-4010-0005
BMP drainage area number:
Print name: 6?�eo � qc,_� W _ ea(*" -U r J I—
or_A =1
Address: _U 010 J 4--
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.
L. Franklin , a Notary Public for the State of
hC , County of do hereby certify that
C o rce w - �r • personally appeared before me this I i
day of V ,a-oq and acknowledge the due execution of the
forgoing wet detention basin maintenance requirements. Witness my hand and official
seal,
: �QrPPyt Lt FRA�Yr
apTAgrz CO
Zs
n "UBOO U
9 =�
5A,
4NN COVN ��`•
�nn11100
SEAL
My commission expires -7-�k.�_oli
Form SW401-Wet Detention Basin O&M-Rev.4 Page 4 of 4

STORMWATER SUBMITTAL REQUIREMENTS
WET DETENTION POND
I. Objective
A. Collect all runoff from all BUA (proposed and/or existing and/or offsite) as the case may be,
by any means including piping or swales, and direct it to the pond.
B. Check the proposed pond design to make sure it meets or exceeds the minimum design
criteria for surface area, volume and drawdown.
II. What makes up a complete wet detention pond application package?
A. Two sets of sealed, signed & dated layout & grading plans with, appropriate details.
(Additional sets of plans may be requested for projects in certain counties)
B. Completed application with supplement(s), SWU-101, SW401-Wet Pond, and inspection and
maintenance agreements.
C. Deed restriction document, if applicable (for subdivisions & projects with out parcels)
D. Sealed, signed & dated calculations. .,
E. Estimated seasonal high water table elevation at all pond locations.
F. Chlorides test results must be provided if the project is within'/z mile of SR waters (Phase 11).
(This is only required to test out of SR water treatment requirements)
III. BIMS entry (for DWQ use only)
Enter & track application acknowledged date, review date, add info requested/received dates, permit
issue dates, and drainage area info. Best done after the add info letter is written and before sending
permit up for signature.
IV. Shell documents (for DWQ use only)
Permit shells: s:\wqs\stormwater\shells\highcompond
s:\wqs\stormwater\sheiis\highsubpond
s:\wqs\stormwater\shelis\HDhybrid
Spreadsheet: s:\wqs\stormwater\excel spreadsheets\pond
VI. Review Procedure
/T
APPLICATION
1.�An original signature is required. Photocopied signatures cannot be accepted.
2. V A completed wet detention pond supplement and a signed, dated and notarized wet
detention pond Inspection and Maintenance Agreement with an original signature.
3. The numbers on the supplement match up to the numbers used in the calculations and
('The
on the plan details.
4. Built -upon areas are reported in square feet in Section 111.6.
5. Receiving stream name and classification. This is important because in the non -Phase
Il,counties, a wet pond cannot be used on a project that is within'/2 mile of and draining
/to SA waters. For Phase II, a wet pond is allowed within '/2 mile of SA waters.
6. Y Section 111.6 is filled in -cannot be left blank. One column must be filled in for each
/proposed wet pond.
7.V If the applicant is a corporation, partnership or LLC, look it up on the Secretary of State
Corporations Database. Make sure corporation is spelled correctly (capitalization and
punctuation matter) and that the person signing the application is at least a vice-
president in the corporation, a General Partner in the partnership, a member in a
member -managed LLC, or the manager of a manager -managed LLC. Need
documentation to support if the Articles of Incorporation do not list the members or
managers of the LLC. If an agent signs, then a letter of authorization is needed from the
sident, vice president, general partner, member or manager.
8�re
I*or subdivided projects, a signed and notarized deed restriction statement must be
provided.

Wet Detention Pond, cont.
B. CALCULATIONS
1.VThe orifice is sized based on drawing down the calculated minimum volume in 2-5
days. The average head to use in the orifice equation is approximately one-third of
the distance between the permanent pool elevation (PPE) and the elevation of the
next available outlet above the permanent pool. The elevation of the next available
outlet must be either the elevation where the minimum volume is provided, or it can
be higher. The temporary pool elevation (TPE) to report on the supplement will be
the elevation of the next available outlet above the PPE. The temporary pool volume
(TPV) to report on the supplement is the volume between the specified PPE and the
TPE.
2�For Phase II projects that are within % mile of and draining to SR waters, the
difference in runoff from the predevelopment and post -development conditions for
3.0Jthe 1 year 24 hour storm must be controlled and treated.
For Phase II projects, the discharge rate leaving the pond can be no more than the
4�fpre -development discharge rate for the 1 year 24 hour storm.
/ or Phase II projects draining to SA water, no discharge to surface waters may occur
from wet ponds. The discharge leaving the orifice must be effectively infiltrated prior to
r€aching surface waters.
5. ✓The average pond depth is the permanent pool volume divided by the permanent pool
surface area. The result must be between 3 ft. and 7.5 ft. Parts of the pond can be
6. �deeper than 7.5 ft., but in no case can any part of the pond be less than 3 ft deep.
lfthe 85 /° T S-ch s used a 30' vegetated filter must be provided at the outlet of the
/pond. If t 90% Thart is used, no filter is required.
7.'V Use the cc VDA TSS chart from the BMP Manual noting that there are different
!charts for different areas of the State.
8. (//Required surface area at permanent pool.
9.✓ Provided surface area at permanent pool (Based on pond dimensions)
10VRequired volume calculation based on 1.5" storm for Phase 11 projects* and 1" storm for
all others projects. *unless the project is Phase 11 and within '/ mile of and draining to
SR waters then the volume calculation must be based on difference between the pre
and post development conditions for the 1-yr 24-hr storm.
11. Table of elevations, areas, incremental volumes and accumulated volumes for overall
pond and for forebay, to verify volumes provided.
12.I/Forebay designed to hold 20% of the permanent pool volume. (Range of 18%-22%
OK.)
13)V///�dbn-erosive flow for 10 yr. storm in the vegetated filter, if using 85% TSS.
14.✓The seasonal high water table must be at or below the proposed permanent pool
elevation to assure that the necessary volume will be available above the permanent
pool!
15. -Rounding numbers off during the calculation process can result in%deficiencies. Do not
round the numbers until you get to the final result.
16VAn additional one foot must be excavated below the bottom elevation of the pond. The 1
foot sediment accumulation depth is not included in the average depth calculation.

/I
Wet Detention Pond, cont.
C. PLANS- Due to storage space constraints, plan sheets should be kept to a minimum. For
small commercial single wet pond projects, the plan set could consist of only 2 or 3 sheets,
layout,,g�ading and details. For larger projects, show as much information as possible on as
few sheets as possible, without cluttering them up.
1.✓ Development/Project Name
2. Engineer name and firm.
3.✓If6gend
4. ✓North Arrow
5.�L/ocation Map withnearest intersection of two major roads shown. Major road is any 1,
6.. ✓2/or 3 digit NC, US or interstate highway.
Scale- standard engineering scale, no off-the-wall stuff.
7./Date
8. Revision number and date, if applicable.
9.✓Original contours, proposed contours, spot elevations, finished floor elevations, pipe
inverts, swale inverts, etc.
10 vEzisting drainage (piping, swales, ditches, ponds, etc.), including off -site. Include a map
/delineating the offsite drainage areas.
11Y Property/Project boundary lines, bearing & distances.
12P/*, kan High Water Line or Normal High Water Line, if applicable.
13.f The permanent pool elevation must be above the SHWT and above the lowest
elevation of adjacent wetlands. Evaluate the need for a liner and/or berm/slurry wall to
1 Revent dewatering the wetland.
rainage easement widths, pipe sizes and swale inverts are provided.
15 Wetlands delineated, or a note on the plans that none exist. Get a copy of the wetlands
delineation map signed by the Corps of Engineers, or have the applicant include a copy
of the unsigned delineation map submitted to the Corps. Wet ponds may not be located
/in wetlands unless a permit to fill those wetlands has been obtained.
16V Details for the roads, parking, cul-de-sacs, including sidewalk width, radii, dimensions &
17Nopes.
partment / Condo development- Provide a typical building footprint with dimensions
/and note all concrete and wood deck areas.
18l! The drainage area for each wet pond is clearly delineated and numbered to match up to
the calculations and supplement. Drainage area delineation is best done as a separate
plan sheet.
19. VA pond section detail to include the forebay, a 10 foot wide vegetated shelf, pertinent
elevations for the bottom, permanent pool, temporary pool, and SHWT, 3:1 slopes
above the permanent pool, and the weir elevation between the main pond and the
r �forebay.
20t/ ,Theme 10 vegetated shelf extends 6" below and 6" above the permanent pool elevation.
21.V An outlet structure detail showing a trash rack with <_6" square openings, the necessary
orifice invert elevation (i.e., the permanent pool), orifice size and temporary pool
velevation.
WDimensions for each line and arc formed by the permanent pool contour.
-Where the 85% TSS chart was used, a 30 ft. vegetated filter strip is required to be
shown on the plans & detailed (elevations, inverts, slopes, and flow spreader
mechanism). Please note that the filter strip is not a ditch.
24. V/a forebay is provided for each inlet and located so as to prevent short-circuiting.
2 The pond must have a minimum 1.5:1 length to width ratio and a minimum 3:1 flow path
length. Artificial "baffles" of timber, vinyl, or earth can be used to create a longer flow
path. The top elevation of the baffle should be set at the temporary pool elevation or
26. A Vegetation plan is specified for the pond, including slopes. Wetlands species are
listed for planting on the 10:1 shelf. Weeping Love Grass is not suitable as a permanent
vegetated cover for pond slopes.
27V/All roof drainage must be directed to the pond. Show the roof drain collection lines on
the plan. This is necessary for projects where the buildings back up the property lines
where roof drainage may leave the site prior to going through the pond.

—. , Vc
` . 1.5 C i V - Uo
DEMLR USE ONLY
Date Received
Fee PaidCX+&- (1. 'S
Permit Number
Z000
SvJ?o9o�10
Applicable j u-le : i oastal SW -1995
❑ Coastal SW - 2008 ❑ Ph II - Post Construction
(select all that apply) ❑ Non -Coastal SW- HQW/ORW Waters ❑ Universal Stormwater Management Plan
. Iy A 5FlRt1Teq M t Plan:
li t! d"b G IL %..I
State of North Carolina �O
Department of Environment and Natural Resources
Division of Energy, Mineral and Land Resources
STORMWATER MANAGEMENT PERMIT APPLICATION FORM
This form may be photocopied for use as an original
I. GENERAL INFORMATION
1. Project Name (subdivision, facility, or establishment name -should be consistent with project name on plans,
specifications, letters, operation and maintenance agreements, etc.):
2. Location of Project (street address):
City: MCAS Cherry Point County: Craven Zip: 28533
3. Directions to project (from nearest major intersection):
Proceed from main gate off of NC Highway 101 along Roosevelt Boulevard. Proceed past MCX Exchange.
Project site is on left next to another existing Child Development Center.
4. Latitude:34° 54' 06" N Longitude:76° 54' 30" W of the main entrance to the project.
II. PERMIT INFORMATION:
1. a. Specify whether project is (check one): ❑New ®Modification ❑ Renewal w/ Modificationt
t Reaetoals With modifications also requires SWU-102 - Renewal Application Form
b.If this application is being sub tted as the result of a modification to an existing permit, list the existing
permit number SW 7090710 , its issue date (if known) 03/30/2011 and the status of
construction: ❑Not Started ❑Partially Completed* ® Completed* *provide a designer's certification
2. Specify the type of project (check one):
❑Low Density ®High Density ❑Drains to an Offsite Stormwater System ❑Other
3. If this application is being submitted as the result of a previously returned application or a letter from
DEMLR requesting a state stormwater management permit application, list the stormwater project number,
if assigned, and the previous name of the project, if different than currently
proposed,
4. a. Additional Project Requirements (check applicable blanks; information on required state permits can be
obtained by contacting the Customer Service Center at 1-877-623-6748):
❑CAMA Major ❑Sedimentation/Erosion Control: ac of Disturbed Area
❑NPDES Industrial Stormwater ❑404/401 Permit: Proposed Impacts
b.lf any of these permits have already been acquired please provide the Project Name, Project/Permit Number,
issue date and the type of each permit:
5. Is the project located within 5 miles of a public airport? V ®No ❑Yes
If yes, see S.L. 2012-200, Part Vl:littl2://12ortal.ncdenr.org/web/Ir/i-ules-aiid-regulations
Form SWU-101 Version Oct. 31, 2013 Page 1 of 6

III. CONTACT INFORMATION
1. a. Print Applicant / Signing Official's name and title (specifically the developer, property owner, lessee,
designated government official, individual, etc. who owns the project):
Signing Official &
b. Contact information for person listed in item la above:
Street Address: Bldg 4223, Access Road
City: MCAS Cherry Point State: NC 'Lip: 28533
Mailing Address (if applicable): PSC Box 8006
City: MCAS Cherry Point State: NC Zip: 28533
Phone: (252 ) 466.4186
Email:[e-mail]
Fax: (252 ) 466.2000
c. Please check the appropriate box. The applicant listed above is:
® The property owner (Skip to Contact Information, item 3a)
❑ Lessee* (Attach a copy of the lease agreement and complete Contact Information, item 2a and 2b below)
❑ Purchaser* (Attach a copy of the pending sales agreement and complete Contact Information, item 2a and
2b below)
❑ Developer* (Complete Contact hiformation, item 2a and 2b below.)
2. a. Print Property Owner's name and title below, if you are the lessee, purchaser or developer. (This is the
person who owns the property that the project is located on):
Property Owner/Organization:
Signing Official &
b.Contact information for person listed in item 2a above:
Street Address:
City:
Mailing Address (if applicable):
Phone: ( )
State: Zip:
Fax:
3. a. (Optional) Print the name and title of another contact such as the projects construction supervisor or other
person who can answer questions about the project:
Other Contact Person/
Signing Official & Title:
b.Contact information for person listed in item 3a above:
Mailing Address:
City: State'. Zip:
Phone: ( ) Fax: ( )
4. Local jurisdiction for building permits: N/A -Federal Installation
Point of Contact: Phone #: ( )
Form SWU-101 Version Oct. 31, 2013 Page 2 of 6

IV. PROJECT INFORMATION
1. In the space provided below, briefly summarize how the stormwater runoff will be treated.
Stormwater runoff from 531 SF of new impermeable area will be directed to existing stormwater retention
2. a. If claiming vested rights, identify the supporting documents provided and the date they were approved:
❑ Approval of a Site Specific Development Plan or PUD Approval Date:
❑ Valid Building Permit Issued Date:
❑ Other: Date:
b.If claiming vested rights, identify the regulation(s) the project has been designed in accordance with:
❑ Coastal SW -1995 ❑ Ph II - Post Construction
3. Stormwater runoff from this project drains to the Neuse River basin.
4. 'Total Property Area: 8.79 acres
5. Total Coastal Wetlands Area: 0 acres
6. Total Surface Water Area: 0 acres
7. Total Property Area (4) - Total Coastal Wetlands Area (5) - Total Surface Water Area (6) = Total Project
Aree:8.79 acres
Total project area shall be calculated to exclude the fallowing the normal pool of impounded structures, tine area
between the banks of streams and rivers, the area below the Normal High Water (NHW) line or Mean High Water
(MHW) line, and coastal wetlands landward from the NHW (or MHW) line. The resultant project area is used to
calculate overall percent built upon area (BUA). Non -coastal wetlands landward of the NHW (or MHW) line may
be included in the total project area.
8. Project percent of impervious area: (Total Impervious Area / Total Project Area) X 100 = 34.0
9. How many drainage areas does the project have?7 (For Itigh density, count 1 for each proposed engineered
stormwater BMP. For low density and other projects, use 1 for the whole property area)
10. Complete the following information for each drainage area identified in Project Information item 9. If there
are more than four drainage areas in the project, attach an additional sheet with the information for each area
provided in the same format as below.
Basin Information
Drains e Area 1
Drains e Area _
Drains e Area _
Drains e Area _
Receiving Stream Name
Sandy Branch
Stream Class *
C; Sw, NSW
Stream Index Number *
27-112-2-3
Total Drainage Area (so
383,228
On -site Drainage Area (sf). '
346,070
Off -site Drainage Area (so
37,158
Proposed Impervious Area*` (so
130,354
53 w+o re
* be
% Impervious Area** total
34.0
Impervious— Surface Area
Drainage Area 1
Drainage Area
Drainage Area
Drainage Area
On -site Buildings/Lots (so
30,620
On -site Streets (so
-
On -site Parking (so
64,496
On -site Sidewalks (so
18,767
Other on -site (so
16,471
Future (so
-
Off -site (so
Existing BUA*** (so
0
Total (so:
130,354
* Stream Class and Index Number can be determined at: kitty://nortai.ncdenr.or aeb/wq/ps/csn/classifications
Impervious area is defined as the built upon area including, but not limited to, buildings, roads, parking areas,
sidewalks, gravel areas, etc.
Form SWU-101 Version Oct. 31, 2013 , Page 3 of 6

'Report only that anaunt of existing BUA that will remain after development. Do not report any existing BUA that
is to be removed and which will be replaced by new BUA.
11. How was the off -site impervious area listed above determined? Provide documentation.
Field VisVt and Topographic Survey
Projects in Union Countv: Contact DEMLR Central Office staff to check if the project is located within a Threatened &
Endangered Species watershed that may be subject to more stringent stormwater requirements as per 15A NCAC 02B .0600.
V. SUPPLEMENT AND O&M FORMS
The applicable state stormwater management permit supplement and operation and maintenance (O&M) forms
must be submitted for each BMP specified for this project. The latest versions of the forms can be downloaded
from http://portalncdenr.org/web/wq/ws/su/bap-manual
VI. SUBMITTAL REQUIREMENTS
Only complete application packages will be accepted and reviewed by the Division of Energy, Mineral and
Land Resources (DEMLR). A complete package includes all of the items listed below. A detailed application
instruction sheet and BMP checklists are available from
http://portal.ncdenr.org/web/wq/ws/su/statesw/forms does. The complete application package should be
submitted to the appropriate DEMLR Office. (The appropriate office may be found by locating project on the
interactive online map athttp://portal,ncdetir.org/web/wq/ws/su/niaps.)
Please indicate that the following required information have been provided by initialing in the space provided
for each item. All original documents MUST be signed and initialed in blue ink. Download the latest versions
J for each submitted application package from http://12ortal.ncdenr.org/web/wq/ws/su/statesw/`forms_docs.
Original and one copy of the Stormwater Management Permit Application Form.
a112. Original and one copy of the signed and notarized Deed Restrictions & Protective Covenants _ 4/h
Form. (if required as per Part VII below) I
3. Original of the applicable Supplement Form(s) (sealed, signed and dated) and O&M
agreement(s) for each BMP.
4 Permit application processing fee of $505 payable to NCDENR. (For an Express review, refer to
http://www.envhelp.org_/pages/onestopexpress.html for information on the Express program
j and the associated fees. Contact the appropriate regional office Express Permit Coordinator for
gut additional information and to schedule the required application meeting.)
5. A detailed narrative (one to two pages) describing the stormwater treatment/management
J 6. A USGS map identifying the site location. If the receiving stream is reported as class SA or the
receiving stream drains to class SA waters within 1/2 mile of the site boundary, include the 1/2
mile radius on the map.
7. Sealed, signed and dated calculations (one copy).
8/ Two sets of plans folded to 8.5" x 14" (sealed, signed, & dated), including:
Ja. Development/Project name.
u/ b. Engineer and firm.
J/ c. Location map with named streets and NCSR numbers.
1 d. Legend.
e. North arrow.
f. Scale.
g. Revision number and dates.
h. Identify all surface waters on the plans by delineating the normal pool elevation of
impounded structures, the banks of streams and rivers, the MHW or NHW line of tidal
waters, and any coastal wetlands landward of the MHW or NHW lines.
• Delineate the vegetated buffer landward from the normal pool elevation of impounded
structures, the banks of streams or rivers, and the MHW (or NHW) of tidal waters.
i. Dimensioned property/project boundary with bearings & distances.
j. Site Layout with all BUA identified and dimensioned.
k. Existing contours, proposed contours, spot elevations, finished floor elevations.
1. Details of roads, drainage features, collection systems, and stormwater control measures.
in. Wetlands delineated, or a note on the plans that none exist. (Must be delineated by a
qualified person. Provide documentation of qualifications and identify the person who
Jmade the determination on the plans.
n. Existing drainage (including off -site), drainage easements, pipe sizes, runoff calculations.
�J o. Drainage areas delineated (included in the main set of plans, not as a separate document).
Form SWU-101 Version Oct. 31, 2013 Page 4 of 6

✓ 9.
p. Vegetated buffers (where required).
Copy of any applicable soils report with the associated SHWT elevations (Please identify Pre�t uSj
elevations in addition to depths) as well as a map of the boring locations with the existing Pcryd 4�
elevations and boring logs. Include an 8.5"xll" copy of the NRCS County Soils map with the
project area clearly delineated. For projects with infiltration BMPs, the report should also
include the soil type, expected infiltration rate, and the method of determining the infiltration rate.
(Infiltration Devices submitted to WiRO: Schedule a site visit for DEMLR to verifiit the SHWF prior
to submittal, [phone].)
10. A copy of the most current property deed. Deed book: Military Page No:
For corporations and limited liability corporations (LLC): Provide documentation from the NC
Secretary of State or other official documentation, which supports the titles and positions held
by the persons listed in Contact Information, item la, 2a, and/or 3a per 15A NCAC 21-1.1003(e).
The corporation or LLC must be listed as an active corporation in good standing with the NC
Secretary of State, otherwise the application will be returned.
httg://www.secret,iry.state.nc.us/Corporations/CSearch.aspx
VIL DEED RESTRICTIONS AND PROTECTIVE COVENANTS
For all subdivisions, outparcels, and future development, the appropriate property restrictions and protective
covenants are required to be recorded prior to the sale of any lot. If lot sizes vary significantly or the proposed
BUA allocations vary, a table listing each lot number, lot size, and the allowable built -upon area must be
provided as an attachment to the completed and notarized deed restriction form. The appropriate deed
restrictions and protective covenants forms can be downloaded from httl2:/112ortal.ncdenr.org/webzlr/state-
stormwater-forms does. Download the latest versions for each submittal.
In the instances where the applicant is different than the property owner, it is the responsibility of the property
owner to sign the deed restrictions and protective covenants form while the applicant is responsible for ensuring
that the deed restrictions are recorded.
By the notarized signature(s) below, the permit holder(s) certify that the recorded property restrictions and
protective covenants for this project, if required, shall include all the items required in the permit and listed
on the forms available on the website, 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 NC DEMLR, and that they will be recorded prior to the sale of any lot.
Vill. CONSULTANT INFORMATION AND AUTHORIZATION
Applicant: Complete this section if you wish to designate authority to another individual and/or firm (such as a
consulting engineer and/or firm) so that they may provide information on your behalf for this project (such as
addressing requests for additional information).
Consulting Engineer: 1. Kevin Avolis, PE
Consulting Firm: Avolis Engineering, PA
Mailing Address: P.O. Box 15564
City: New Bern
Phone: (252 ) 633.0068
EmaiLavo I isengineering®embargmail.com
State: NC Zip: 28561
Fax: ( )
IX. PROPERTY OWNER AUTHORIZATION (if Con tact Information, item 2 has been filled out, complete this
section)
I, (print or hjpe name of person listed in Contact Information, items 2a) , certify that I
own the property identified in this permit application, and thus give permission to (print or hjpe name of person
listed in Contact Information, item la) with (print or hjpe tame of organization listed in
Contact Information, item 1 a) to develop the project as currently proposed. A copy of
the lease agreement or pending property sales contract has been provided with the submittal, which indicates the
party responsible for the operation and maintenance of the stormwater system.
Form SWU-101 Version Oct. 31, 2013 Page 5 of 6

As the legal property owner I acknowledge, understand, and agree by my signature below, that if my designated
agent (entity listed in Contact Information, item 1) dissolves their company and/or cancels or defaults on their
lease agreement, or pending sale, responsibility for compliance with the DEMLR Stormwater permit reverts back
to me, the property owner. As the property owner, it is my responsibility to notify DEMLR immediately and
submit a completed Name/Ownership Change Form within 30 days; otherwise I will be operating a stormwater
treatment facility without a valid permit. I understand that the operation of a stormwater treatment facility
without a valid 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.
I, , a Notary Public for the State of County of
do hereby certify that
before me this _ day of
personally appeared
and acknowledge the due execution of the application for
a stormwater permit. Witness my hand and official seal,
SEAL
My commission
X. APPLICANT'S CERTIFICATION
I, (print or type nmue of person listed in Contact Information, item 1a) George Radford
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 1the p pr�o,�p{osed project complies with the requirements of the
applicable storm -water rules un r 1 NC 2�AUFUan any other applicable state stormwater requirements.
///&d Environmental Affairs Officer agTcet/aOfs
Signature:(�,/Ry �'restien of the Gemma, id rrzrP FFf a� Date:
Public for the Staff of NUJ -ffX l lAJ I/ IArM, County of
do hereby certify that k.1CM.. i V-,i5 1101 v personally appeared
s.'l. T4.Ve, C; OOil
before me thi _day of and acknowledge the�ue�e�c/ujtion of the plicafion for
a stormwater permit. Witness my hand and official seal,Tj'JL/lY{ `
OE�t Al fp�'y
t s�
`MV CoN°yenyCObfic
nt
3 2 0313 0/2020 xpirea
SEAL
My commission expires O�LVl�t_J
Form SWU-101 Version Oct. 31, 2013 Page 6 of 6

Permit
(to be provided by D WQ)
NCDENR
Project name
Contact person
Phone number
Date
Drainage area number
STORMWATER MANAGEMENT PERMIT APPLICATION FORM
401 CERTIFICATION APPLICATION FORM
WET DETENTION BASIN SUPPLEMENT
This to" must be filled out, printed and submitted.
The Required Items Checklist (Part III) must be printed, filled out and submitted along with all of the required information. -
2W bJ3 Wbb
61312015
Ill. DESIGN INFORMATION
Site Characteristics _
Drainage area 383,228.. ftz
Impervious area, post -development 130,354- ftz
%impervious 34.01 %
Design rainfall depth 1.5 in
Storage Volume: Non -SA Waters
O�OF VIA
ti
o
North Carolina
Minimum volume required
16,296 ft3
Volume provided
22,668 ft'V/
OK, volume provided is equal to or in excess of volume required.
Storage Volume: SA Waters
1.5" runoff volume
N/Aft'
Pre -development 1-yr, 24-hr runoff
ft3
Post -development 1-yr, 24-hr runoff
ft3
Minimum volume required
Volume provided ft3
Peak Flow Calculations
Is the prelpost control of the 1 yr 24hr storm peak flow required?
Y (Y or N)
1-yr, 24-hr rainfall depth
3.9' in
Rational C, pre -development
0.43;(unifless)
Rational C, post -development
0.51,(unitess)
Rainfall intensity: 1-yr, 24-hr storm
0.16 inmr Insufficient. Check intensity calculation.
Pre -development 1-yr, 24-hr peak flow
13.20 ft`/sec
Post -development 1-yr, 24-hr peak flow
14.98 ft'Isec
Pre/Post 1-yr, 24-hr peak flow control
1.78 ft3lsec
Elevations
Temporary pool elevation
Permanent pool elevation
SHWT elevation (approx. at the perm. pool elevation)
Top of 1Oft vegetated shelf elevation
.Bottom of 1Oft vegetated shelf elevation
Sediment cleanout, top elevation (bottom of pond)
Sediment cleanout bottom elevation
Sediment storage provided
Is there additional volume stored above the stale -required temp. pool?
Elevation of the top of the additional volume
- 20.15fmsl
19.00,fmsl
18.50-fmsl
19.50'.fmsl
18.50-fmsl
Data not needed for calculation option H1, but OK if provided.
13.00 tmsl
12,00 fmsl
Data not needed for calculation option q1, but OK it provided.
1.00 ft
Y (Y or N)
20.2 first
OK
Fen SW401-Wet Detention Basin-Rev.94118/12 Parts I. & II. Design Summary, Page 1 of 2

Permit
tlo be provided by
II. DESIGN INFORMATION
Surface Areas
Area, temporary pool
15,324 ft?
Area REQUIRED, permanent pool
11,573 ft
SAIDA ratio
3.02 (unitless)
Area PROVIDED, permanent pool, A,._.
11,834 a OK
Area, bottom of 1Oft vegetated shelf, A„ ,,a
9,519 ft
Area, sediment cleanout, top elevation (bottom of pond), Awt,,,w
3,360 fir
Volumes
Volume, temporary pool
16,296 fl3
Volume, permanent pool, V.-y,a
47,267 its
Volume, forebay (sum of forebays if more than one forebay)
10,783 Its
Forebay %of permanent pool volume
22.8% %
SAIDA Table Data
Design TSS removal
90 %
Coastal SAIDA Table Used?
Y (Y or N)
Mountain/Piedmont SAIDA Table Used?
N (Y or N)
SAIDA ratio
3.02 (unitless)
Average depth (used in SAIDA table):
_
Calculation option 1 used? (See Figure 10-2b)
r'Y (Y or N)
Volume, permanent pool, Vp,., p„ 1
47,267 W
Area provided, permanent pool, Ap,,, p,u
11,834 8`
Average depth calculated
4,17 ft
Average depth used in SAIDA, d., (Round to nearest 0.5ft)
4.0 A
Calculation option 2 used? (See Figure 10-2b)
N (Y or N)
Area provided, permanent pool, Ap„. p,a
11,834 ft
Area, bottom of 1Oft vegetated shelf, Ay,,.„
9,519 ft
Area, sediment cleanout top elevation (bottom of pond), Aml.w�d
3,360 fit'
Insufficient. Volume does not agree with data previously entered.
Insufficient forebay volume.
OK
OK
'Depth' (distance blw bottom of IN shelf and tap of sediment)
5.50 It
Average depth calculated
ft
Average depth used in SAIDA, it., (Round to down to nearest 0.5ft)
- It
Drawdown Calculations
Drawdown through orifice?
Y (Y or N)
Diameter of orifice (if circular)
2.25 in
Area of orifice (if -non -circular)
in
Coefficient of discharge (Cu)
0.60(unitless)
Driving head (H,)
1.15 ft
Drawdown through weir?
N (Y or N) -
Weir type
(uni8ess)
Coefficient of discharge (C„.)
(unitless)
Length of weir (L)
it
Driving head (H)
ft
Pre -development 1-yr, 24-hr peak flow _
13.20 ft'Isec
Post -development 1-yr, 24-hr peak flow
14.98. ft'/sec
Storage volume discharge rate (through discharge onfce or weir)
0.08 fts/sec
Storage volume drawdown time
2.26 days OK, draws down in 2.5 days,
Additional Information
Vegetated side slopes
3 :1
OK
Vegetated shelf slope
10 :1
OK
Vegetated shelf width
10.0 ft
OK
Length of flowpath to width ratio
3 :1
OK
Length to width ratio
3.0 :1
OK
Trash rack for overflow & onfice?
Y (Y or N)
OK
Freeboard provided
2.0 ft
OK
Vegetated filter provided?
N _(Y or N)
OK
Recorded drainage easement provided?
Y (Y or N)
OK
Capures all runoff at ultimate build -out?
Y. (Y or N)
OK
Drain mechanism for maintenance or emergencies is:
'Pump.
Form SW401-Wet Detention Basin-Rev.94/18/12 Pans 1.811. Design Summery, Page 2 of 2

Permit Number:
(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
This system (check one):
❑ does ® does not
incorporate a vegetated filter at the outlet.
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 I 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 O&M-Rev.4 Page 1 of 5-

Permit Number:
(to be provided by DWQ)
Drainage Area Number:
Form SW401-Wet Detention Basin O&M-Rev.4 Page 2 of 5

Permit Number:
(to be provided by DWQ)
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.
.1 Form SW401-Wet Detention Basin O&M-Rev.4 ' . • '1 Page 3 0$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 re air.. if applicable)
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 6 feet in the main pond, the sediment
shall be removed.
When the permanent pool depth reads 6 feet in the forebay, the sediment shall
be removed.
BASIN DIAGRAM
(fill in dte blanks)
Permanent Pool Elevation 19.0
Sediment Removal . 13.0 Pe anen Pool
------- --- Volume Sediment Removal Elevation 13.0 Volume
Bottom Elevatio 12.0 ft Min.
----------------------------------------- ------
Sediment Bottom Elevation 12.0 I-fl n
Storage Sedimet
Storage
FOREBAY MAIN POND
Form SW401-Wet Detention Basin O&M-Rev.4 Page 4 of $• ,

Permit Number:
(to be provided by DWQ)
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.
Project name: Repairs & Improvements to Building 4298, MCAS Cherry Point, NC
BMP drainage area number:
Print name: George Radford n
6 W, ftRf�F9R
Title: Director Environmental Affairs Environmental Affairs officer
Address: PSC 8006 MCAS Cherry Point, NC 28533-0013
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.
a Notary Public for the State of
NbYAY\ Wb ( nA , County of ON U \ , do hereby certify that
personally appeared before me this
day of and acknowledge the due execution of the
forgoing wet detention basin maintenance requirements. Witness my hand and official
seal, .
W/V p'
NotoN Public
g Croven County _MY Commission Ex Ites
0313012020
'. OgrH CP'I �
SEAL
My commission expires �� 015,50k
-* Form SW401-Wet Deten[ion-Basin O&M-Rev.4 — - I• ,. -Page 5 of-5 - - ..