SW7081208_CURRENT PERMIT_20210414

STORMWATER DIVISION CODING SHEET
POST -CONSTRUCTION PERMITS
PERMIT NO.
DOC TYPE
CURRENT PERMIT
APPROVED PLANS
❑ HISTORICAL FILE
❑ COMPLIANCE EVALUATION INSPECTION
DOC DATE
-2, l
YYYYM M D D

(jAn�
ROY COOPER
Governor
DIONNE DELLI-GATTI
Secretary
BRIAN WRENN
Director
NORTH CAROLINA
Environmental Quality
April 14, 2021
State Employees' Credit Union
Attention: Jonathan Crane, SVP. Facilities Services
P.O. Box 26807
Raleigh, NC 27611
Subject: Stormwater Permit No. SW7081208 Renewal
SECU — Columbia, NC
High Density Project
Tyrrell County
Dear Mr. Crane:
The Washington Regional Office received a Stormwater Management Permit
Application for renewal of the subject permit on March 19, 2021. Staff review of the
application has determined that the permit can be reissued. We are forwarding Permit
No. SV 7081208 dated April 14, 2021, for the continued operation of the existing
stormwater system.
This permit, upon its effective date, will replace all previous State Stormwater permits for
this project. This permit shall be effective from December 31, 2021 until December 30,
2029 and shall be subject to the conditions and limitations as specified therein, and does
not supercede any other agency permit that may be required. Please pay special attention
to the Operation and Maintenance requirements in this permit. Failure to establish an
adequate system for operation and maintenance of the stormwater management system
will result in future compliance problems.
If any parts, requirements, or limitations contained in this permit are unacceptable, you
have the right to request an adjudicatory hearing upon written request within thirty (30)
days following receipt of this permit. This request must be in the form of a written petition,
conforming to Chapter 150B of the North Carolina General Statutes, and filed with the
Office of Administrative Hearings, 6714 Mail Service Center, Raleigh, NC 27699-6714.
Unless such demands 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,
Roger K. Thorpe
Environmental Engineer
E
North Carolina Department of Environmental Quality I Division of Energy, Mineral and Land Resources
Washington Regional Office 1 943 Washington Square Mall I Washington. North Carolina 27889
2529466481

STATE OF NORTH CAROLINA
DEPARTMENT OF ENVIRONMENTAL QUALITY
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
State Employees' Credit Union
SECU - Columbia
Located at 1122 Scuppernong Drive — US HWY 64, Columbia, NC
Tyrrell County
FOR THE
construction, operation and maintenance of a wet detention pond system 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 December 31, 2021 until December 30, 2029, 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 0.87 acres of impervious area.
3. The tract will be limited to the amount of built -upon area indicated in Section 1.7
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.
u. ® -y� North Carolina Department of Environmental Quality I Division of Energy. Mineral and Land Resources
Washington Regional Office 1 943 Washington Square Mall I Washington. North Carolina 27889
°� 252946.6481

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 pond system and
must be maintained at design condition:
N
Drainage Area, ac.:
Total Impervious Surfaces, ft2:
Design Storm, inches:
TSS removal efficiency %:
Permanent Pool Elevation, FMSL:
Basin Depth, ft.:
Permitted Surface Area, ft2:
Tempory Storage Elevation, FMSL:
Permitted Storage Volume, ft3:
Controlling Orifice:
Receiving Stream/River Basin:
Classification of Water Body:
IL SCHEDULE OF COMPLIANCE
2.
11
6.44
37,890
1.5
90
2.0
5.0
4,590
2.8
4,631
1.0" O pipe
UT to Scuppernong River/ Pasquotank
"SC"
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.
g. Access to the outlet structure must be available at all times.
Records of maintenance activities must be kept for each permitted SCM. The
records will indicate the date, activity, name of person performing the work and
what actions were taken.
North Carolina Department of Environmental Quality I Division of Energy, Mineral and Land Resources
Washington Regional Office 1943 Washington Square Mall I Washington. North Carolina 27889
252.946.6481

5. The permittee shall submit to the Division, an annual summary report of the
maintenance inspection records for each SCM. The report shall summarize the
inspection dates, results of the inspections, and the maintenance work performed
at each inspection.
6. Access to the stormwater facilities shall be maintained via appropriate
easements at all times.
7. 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.
8. 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.
9. 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.
10. 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.
11. 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:
` �7: North Carolina Department of Environmental Quality I Division of Energy, Mineral and Land Resources
Ft4'r.7 Washington Regional Office 1943,Washingion Square Niall I Washington. North Carolina 27889
mom: 282.946.6481

12. The permittee shall submit final site layout and grading plans for any permitted
future areas shown on the approved plans, prior to construction.
13. A copy of the approved plans and specifications shall be maintained on file by
the Permittee at all times.
II. GENERAL CONDITIONS
1. This permit is not transferable except after notice to and approval by the Director.
In the event of a change of ownership, or a name change, the permittee must
submit a 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 DEQ 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.
�D Fp ��� North Carolina Department of Environmental Quality I Division of Enei gy. Mineral and Land Resources
Washington Regional Office 1 943 Washington Square Mall I Washington. North Carolina 27889
riww V
o.o, 282.946.6481

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 December 31, 2021 until December 30,
2029. 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 14 th day of April 2021.
NORTH CAROLINA ENVIRONMENTAL MANAGEMENT COMMISSION
or
Division of Energy, Mineral and Land Resources
By Authority of the Environmental Management Commission
Permit Number SW7081208
North Carolina Department or Environmental Quality I Division of Energy, Mineral and Land Resources
Washington Regional Office 1 943 Washington Square Mali I Washington, North Carolina 27889
252.946.6481

State
March 8, 2021
'Credit Union
NC Department of Environmental Quality
943 Washington Square Mall
Washington, NC 27889
To Whom It May Concern:
H0TIE
lU
MAR 19 03Z1
Enclosed is the Stormwater Permit Renewal Application Permit Number SW7081208 for the
SCM located at:
SECU
1122 Scuppernong Drive
US Highway 64
Columbia, NC 27925
A Cashiers Check is also enclosed in the amount of $505.00 for the renewal.
Please let me know if you need any additional information.
Sincerely,
John F. Elliott
SECU Facilities Management
919-839-8011
ielliottAncsecu.org
SCM Inspection and Maintenance Certification #3025
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4401 Crcedmoor Road • P.O. Box 26807 a Raleigh, NC 27611-6807 • 919-856-3340
"Equal Employment/Affirmative Action Employer, M/F/Disabdity/Veteran"

DEMLR USE ONLY
IFIP-Date Received
Fee Paid
Permit Number
3 1 �—I
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Sw7 c if �.
NC DEQ Division of Energy, Mineral and Land Resources
STATE STORMWATER:
PERMIT RENEWAL APPLICATION FORM
In accordance with 15A NCAC 2H.1045(3), the current permit holder shall renew their high density permit 180 days
prior to its expiration. Renewed permits are valid for a period of 8 years per Session Law 2011-398 (SB 781)
Section 60.(c). This application form is for permit renewals only.
A. PROJECT INFORMATION
1. State Stormwater Permit Number: SV 7081208
2. Project name: SECU - COLUMBIA
3. Project street address: 1122 SCUPPERNONG DRIVE- US HIGHWAY 64
City: COLUMBIA County: TYRRELL ZIP
27925
4. What, if any, changes have been made to the project as permitted? NONE
If the project has changed from the original approved plans, please complete SWU-101 for a Major
Modification or Minor Modification Application form available at hftps://deg.nc.gov/abouUdivisions/energv-
mi neral-land-resources/energy-mineral-land-rules/stormwater-grog ram/post-construction.
B. PERMITTEE INFORMATION
If changes to the permittee or project name have been made, please complete either the Permit Update form
or the Permit Transfer form available at. https //deg ncgov/abouUdivisions/energy-mineral-land-
resources/enerav-mineral-land-rules/stormwater-Droaram/post-construction. State Stormwater Permits do not
with the sale of the property.
1. Current Permit Holder's Company Name/Organization: STATE EMPLOYEES' CREDIT UNION
2. Signing Official's Name: JONATHAN CRANE
3. Signing Official's Title: SVP, FACILITIES SERVICES
4. Mailing Address: P.O. BOX 26807
City: RALEIGH State NC ZIP: 27611
5. Street Address: 4401 CREEDMOOR ROAD
City: RALEIGH State: NC ZIP: 27612
6. Phone. [phone] Email FACILITIESSERVICES(o)NCSECU.ORG
Stormwater Permit Renewal Form Page 1 of 3 May 11, 2018

C. SUBMITTAL REQUIREMENTS
Submit the application package to the appropriate DEMLR Regional Office (Coastal, SA Waters) or DEMLR
Central Office (Urbanizing Areas Ph 2, USMP, Non -Coastal HQW/ORW). Only applications packages that
include all required items listed below will be accepted and reviewed.
Initial each item below to indicate that the required information is provided in the application package:
JC 1. A permit application processing fee of $505.00 payable to NCDEQ.
JC 2. One original signed hard copy and one electronic copy of this completed form The signing official
named on this application to represent the current permittee must meet one of the following:
a. Corporation — a principle executive officer of at least the level of vice-president;
b Limited Liability Company (LLC) — a manager or company official as those terms are defined
in G.S. 57D "North Carolina Limited Liability Company Act;"
c. Public Entity — a principal executive officer, ranking official, or other duly authorized employee;
d. Partnership or limited partnership — the general partner;
e. Sole proprietor, or
f. Letter of authorization signed by one of the signatories noted in a — e above authorizing the
signature of another entity.
JC 3. One hard copy and one electronic copy of recorded documents required by the original permit that have
not yet been received by DEMLR, including: deed restrictions, protective covenants,
condominium/planned community declaration and easements. If the project has been built, include
documentation that the maximum BUA per lot or maximum total BUA has not been exceeded. If
the project has not been built, include a signed agreement that the final recorded deed restrictions
and protective covenants will be submitted at a later date.
JC 4. O&M Agreements, Please select one.
❑ I have a copy of the current recorded O&M Agreement for all SCMs, and I will continue to
keep this on file with the permit; or
® 1 do not have a copy of the current recorded O&M Agreement for all SCMs and am
requesting a copy be sent to me. I agree to keep this on file with the permit.
JC 5. Designer Certifications, Please select one:
® A copy of the certification(s) confirming that the project was built in accordance with the
approved plans have been previously provided to the Division; or
❑ A copy of the certification(s) confirming that the project was built in accordance with the
approved plans are enclosed, or
❑ The project has not yet been built.
N/A 6. [IF APPLICABLE] If the project has been built, one original hard copy and one electronic copy of a
signed, sealed, and dated letter from a licensed professional stating that the SCMs have been
inspected, and that they have been built and maintained in accordance with the permit.
N/A 7. [IF APPLICABLE] When the permittee is a corporation or a limited liability corporation (LLC): Provide
one hard copy and one electronic copy of documentation from the NC Secretary of State, or other
official documentation, which supports the titles and positions held by the persons listed in Section
C.2 per 15A NCAC 2H. 1043(3)(b).
htti)&//www.sosnc.gov/online services/search/by title/ Business Registration
Stormwater Permit Renewal Application Form Page 2 of 3 May 11, 2018

D. PERMITTEE'S CERTIFICATION
o,JA rH4ti C24�.1 E , the person legally responsible for the permit, certify that I have
a copy of the Permit and O&M Agreement on site (or I will obtain a copy and it will be kept on site), that I am
responsible for the performance of the maintenance procedures, and the site has been and will be maintained
according to the O&M Agreement and approved plans. I agree to notify DEMLR of any problems with the SCMs
or built -upon area and to submit the proper forms to modify or transfer the permit prior to any changes to the
project, SCMs, or ownership. All information provided on this permit renewal application is, to the best of my
knowledge, correct and complete-
Signature:o
mpl/ete-
Signature: Date: 03 r
NOTARIZATION:
I, usE P H 3rxF)+>,e . a Notary Public for the State of
/JomL m CA Ru County of LJ A ks do hereby certify
that . _L' ATgn.I C—sr-q iC personally appeared before me
this the t sr day of r i AR-C+k 20 2 , and acknowledge the due
execution of the forgoing instrument. Witness my hand and official seal,
(Notary Seal)
Notary Signature:
My commission ex ires r i 20 z
Stormwater Permit Renewal Application Form Page 3 of 3 May 11, 2018

'tf!
.ram •'�
m

State Stormwater Management Systems
Permit No. SV 7081208
Stormwater:EermifNO:_SVV7.08:1208
State_Effiployyees �Credit.Union4f
m FColubia;NC
Designer's Certification
cc%P C. hR6sT as a duly registered Peecyzsia."A4. ENrs NwL in the
State of North Carolina, having been authorized to observe (periodically/ weektyt fail
time) the construction of the project,
5Th'rE EMOtEE�' CR+`OIT UNrnTo — COt-U Mgl+ri'
(Project)
for STl4Tb EMPIoiAcSS C "tTr- uNlo� (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:
CAR
S . Q OF ESBr0�t
9
Signature } `
Registration Number O32S'73 `3 �
/f
Date 51271/1PEt>�
�. P.$s...
Page 6 of 7

State Stormwater Management Systems
Permit No. SW7081208
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.
L5. The outlet/bypass structure elevations are per the approved plan.
'i 6. The outlet structure is located per the approved plans.
7. Trash rack is provided on the outlet/bypass structure.
i _8. All slopes are -grassed with permanent vegetation.
y�9. Vegetated slopes are no steeper than 3:1.
10. The inlets are located per the approved plans and do riot cause short-
circuiting of the system.
j 2 11. The permifted 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.
JT_14. All required parts of the system are provided, such as a vegetated shelf,
and a forebay.
_J�L15. The required system dimensions are provided per the approved plans.
Page 7 of 7

Permit Number:
(to be provided by DIVA)
Drainage Area Number:
Wet Detention Basin Operation and Maintenance Agreement
I will keep a maintenance record on this BMP. This maintenance record will be kept in a
log in a known set location. Any deficient BMP elements noted in the inspection will be
corrected, repaired or replaced immediately. These deficiencies can affect the integrity
of structures, safety of the public, and the removal efficiency of the BMP.
The wet detention basin system is defined as the wet detention basin,
pretreatment including forebays and the vegetated filter if one is provided.
This system (check one):
❑ does ® does not incorporate a vegetated filter at the outlet. MAR 1 3 2009
This system (check one): f ;' . ;`t /0E; y
❑ 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 apl2lication.
Vegetation is too short or too
Maintain vegetation at a height of
lon
-approximately six inches.
Form SW401-Wet Detention Basin O&M-Rev.3
Page 1 of 4

Permit
(to be provided by DWQ)
Drainage Area
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 s ra in .
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 al al 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&NI-Rev.3
Page 2 of 4

Permit Number:
(to be provided by DWQ)
Drainage Area Number:
BMP element:
Potentialproblem:
How I will remediate theproblem:
The embankment
Shrubs have started to grow
Remove shrubs immediately.
on the embankment.
Evidence of muskrat or
Use traps to remove muskrats and
beaver activity is present,
consult a professional to remove
beavers.
A tree has started to grow on
Consult a dam safety specialist to
the embankment.
remove the tree.
An annual inspection by an
Make all needed repairs.
appropriate professional
shows that the embankment
needs repair.
The outlet device
Clogging has occurred.
Clean out the outlet device. Dispose
of the sediment off -site.
The outlet device is damaged
Repair or replace the outlet device.
The receiving water
Erosion or other signs of
Contact the local NC Division of
damage have occurred at the
Water Quality Regional Office, or
outlet.
the 401 Oversight Unit at 919-733-
1786.
The measuring device used to determine the sediment elevation shall be such
that it will give an accurate depth reading and not readily penetrate into
accumulated sediments.
When the permanent pool depth reads 5.00 feet in the main pond, the
sediment shall be removed.
When the permanent pool depth reads 1.00 feet in the forebay, the sediment
shall be removed.
Sediment Removal
Bottom
BASIN DIAGRAM
(fill in the blanks)
1.00 Pe maven
------------------ Volume
i 0.00 ft Min.
Sediment
Storage
POREBAY
Permanent Pool Elevation 2.00
Pool
Sediment Removal Elevation -300 Volun
Bottom Elevation
MAIN POND
1-ft
Storage
Form SW401-Wet Detention Basin 0&M-Rev.3
Page') of 4

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:State Employees' Credit Union - Columbia
BMP drainage area number: Pond #1
Print name: Robert S. Hall
Title: Sr. Exec. Vice President
Address:1000 Wade Avenue, Raleigh, NC, 27605
Date: 31 k� ! �`�
Note: The legally responsible party should not be a homeowners association unless more than 50% of
the lots have been sold and a resident of the subdivision has been named the president.
1, Ele-4nog. /- llcis A&1J&(Da Notary Public for the State of
C unty of (je,, P , do hereby certify that
personally appeared before me this G x�
day of m aQ .ei , j y(n % , and acknowledge the due execution of the
forgoing wet detention basin maintenance requirements. Witness my hand and official
seal,
NRR.0
a�TAR� OWN
011�.•
SEAL
Mycommission expires % 3 LrJ/T?
Form SW401-Wet Detention Basin O&M-Rev.3
Page 4 of 4

262

r _ 1
Permit
117",
Ito be Prov.Hed by OWO)
® '�if-a
NCDENR
MAY 2 8 2009
r
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 III) must be printed, filled out and submitted along with all of the required information
o�OF w A re90c
� r
o �c
jl.� PROJECT _
INFORMATION
Protect name
Contact person
Phone number
Date
Drainage area number
Fatty E. HIIOum
[phone]
52612009
IL DESIGN INFORMATION
Site Characteristics
Drainage area
50,803 ft'
Impervious area, post -development
37,890'ft'
%impervious
74.58 %
Design rainfall depth
1.5 in
Storage Volume: Non -SA Waters
Minimum volume required
Volume provided
Storage Volume: SA Waters
1 5" runoff volume
Pre development 1-yr, 24-hr runoff
Post -development 1-yr, 24-hr runoff
Minimum volume required
Volume provided
Peak Flow Calculations
Is the prelpost control of the lyr 24hrstorm peak flow required?
1-yr, 24-hr rainfall depth
Rational C, pre -development
Rational C, post -development
Rainfall intensity 1-yr, 24-hr stone
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
SHVIT elevation (approx. at the perm. pool elevation)
Top of 10ft vegetated shelf elevation
Bottom of 10ft 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 lop of the additional volume
045 ft' Insufficient required volume.
4,631 ft'
OK, volume provided is equal to or in excess of volume required
It
ft3
ft3
0 ft3
ft,
n -,(Y or N)
3.0 in
0.30 (umttess)
0.77 (umttess)
536 inmr OK
1.88 ft/sec
4.83 ft3lsec
2.95 ft3lcpr.
2.80 fmsl
2.00 ftnsl
150 fmsl
2.50 first
1.50 fmsl
-3.00 fmsl
A,00 fmsl
1.00 ft
n (YorN)
2.8 first OK
Form SW401-Wet Detention Basin -Rev 5
Parts I. 8 11 Design Summary, Page 1 of 2

Permit No.
(to be pr lld tlby DWO)
Ill. DESIGN INFORMATION
Surface Areas
Area, temporary pool
6,967:ft'
Area REQUIRED, permanent pool
4,420 ft'
SAIDA ratio
8.70 (unifless)
Area PROVIDED, permanent pool, A,.
4,590 ft OK
Area, bottom of 10ft vegetated shelf, A...
2,268 ft
Area, sediment cleanout, top elevation (bottom of pond), A..,
5941ft
Volumes
Volume, temporary pool
4,631' ft"
OK
Volume, permanent pool, Vp,,,.
7,882 ft"
Volume, forebay (sum of forebays if more than one forebay)
1,527,ft3
Forebay % of permanent pool volume
19.4% %
OK
SAIDA Table Data
Design TSS removal
g0 %
Coastal SAIDA Table Used?
y (Y or N)
MountairdPiedmont SAIDA Table Used?
n (Y or N)
SAIDA ratio
8.70 (unitless)
Average depth (used in SAIDA table):
Calculation option 1 used? (See Figure 10-2b)
It ,(Y or N)
Volume, permanent pool, V._p ,
'ft3
Area provided, permanent pool, Ap,,,,_y
N'
Average depth calculated
It
Average depth used in SAIDA, d„, (Round to nearest 0.5ft)
'ft
Calculation option 2 used? (See Figure 10-2b)
y "(Y or N)
Area provided, permanent pool, A._.
? 4,590 ft,
OK
Area, bottom of 1 Oft vegetated shelf, A,_,,,,
2,268 ft2
OK
Area, sediment cleanout, top elevation (bottom of pond), A�yP,a
594 ftr
OK
"Depth" (distance b/w bottom of 1 Oft shelf and top of sediment)
4.50 ft
OK
Average depth calculated
i 3.21 It
OK
Average depth used in SAIDA, d„, (Round to nearest 0.5ft)
3.0 It
OK
Drawdown Calculations
Drawdown through onficev
y (Y or N)
Diameter of orifice (if circular)
1.00 in
Area of orifice (if -non -circular)
in
Coefficient of discharge (Cc)
0.60 (umfless)
Driving head (Ho)
0.80 It
Orawdown through weir?
n . (Y or N)
Weir type
' (unit ess)
Coefficient of discharge (C..)
(unitfess)
Length of weir (L)
If
Driving head (H)
It
Pre -development 1-yr, 24-hr peak flow
1.90.ft3lsec
OK
Post -development 1-yr, 24-hr peak flow
0.12 ry3lsec
OK
Storage volume discharge rate (through discharge orifice or weir) , 0.02 ft3lsec
Storage volume drawdown time
2.28 days
OK, draws down in 2-5 days.
OK, drawdown time is correct.
Additional Information
Vegetated side slopes
31
OK
Vegetated shelf slope
10 :1
OK
Vegetated shelf width
10.0 It
OK
Length of flowpath to width ratio
; 3 :1
OK
Length to width ratio
2.5 .1
OK
Trash rack for overflow 8 orifice?
y (Y or N)
OK
Freeboard provided
1.0 If
OK
Vegetated filter provided?
n (Y or N)
OK
Recorded drainage easement provided?
n ;(Y or N)
Insufficient. Recorded drainage easement required.
Capures all runoff at ultimate build -out?
y (Y or N)
OK
Drain mechanism for maintenance or emergencies
Pump to be utilized for maintenance and emergency purposes ,
Form SW401-Wet Detention Basin -Rev 5
Pane r x 11 nxinn cu __ Patio S tit 9

Permit No.
�. Ito be Provded by DWQ)
MAY 2 8 2009
TA
NCDENR
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 III) must be printed, filled out and submitted along with all of the required informalion.
Project name
Contact person
Phone number
Date
Drainage area number
0p W Ares
o
o
II.'DESIGN'INFORMATION
`-ate'.
Site Characteristics
Drainage area '.30,503 ft
Impervious area, post -development".-:;,; 37,890, fta
% impervious 7458 %
Design minfall depth j?s�': Ys*�115 in
Storage Volume: Non -SA Waters
Minimum volume required
Volume provided
Storage Volume: SAWaters
1.5' runoff volume
Pre -development 1-yr, 24-hr runoff
Post -development 1-yr, 24-hr runoff
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. pod elevation)
Top of 1 Oft vegetated shelf elevation
Bottom of 10ft vegetated shelf elevation
Sediment deanout, 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
f m"; ` T4,545 it' Insufficient required volume.
wn-''._",,, f, ,,,
L'*`n � x 4, -3 ft3
✓;�''*=^?':.,:*s,? OK, volume provided is equal to or in excess of volume required.
�✓`;;�.'.<v:+<"s'�i•J^na < ft3
Ste' ft3
}� 0 113
Kv
u3'•�-.m—'� m
3.0 in
e+::P0.30,(umttess)
e;n0:77 limitless)
inthr OK
188 Osec
4.83 ft3lsec
2.95 ft31SeC
r•=� ��_sr:;:,i"2.00' fmsl
2.50 fmsl
fmsl
'�3.0o,fmsl
fmsl
1.00 It
:.w°''�`
,d"'M
fmsl OK
Form SW401-Wet Detenton Basin -Rev 5
Parts I. 8 11. Design Summary, Page 1 of 2

Permit No.
(ro be omvc dby DWO)
II'DESIGN INFORMATIONS
Surface Areas
Area, temporary pool
Area REQUIRED, permanent pool
SAIDA ratio
Area PROVIDED, permanent pool, A._,,
Area, bottom of 1 Off vegetated shelf, Ay ,r„„
Area, sediment deanout, top elevation (bottom of pond), Ate.
Volumes
Volume, temporary pool
Volume, permanent pool, V., rem
Volume, forebay (sum of forebays 1f 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 10-21b)
Volume, permanent pool, V.-P.
Area provided, permanent pool, Ate,,
Average depth calculated
Average depth used in SAIDA, d.„ (Round to nearest 0.5ft)
Calculation option 2 used9 (See Figure 10-21b)
Area provided, permanent pool, A._.
Area, bottom of 10ft vegetated shelf, A,,,,
Area, sediment cleanout, top elevation (bottom of pond), Ayr vo,
'Depth' (distance btw bottom of 10ft shelf and top of sediment)
Average depth calculated
Average depth used in SAIDA, d„, (Round to nearest 0.5ft)
Drawdown Calculations
Drawdown through onfice?
Diameter of onfice (d circular)
Area of orifice (if -nor circular)
Coefficient of discharge (Co)
Driving head (H.)
Drawdown through weir.?
Weir type
Coefficient of discharge (C„.)
Length of weir (L)
Driving head (H)
Pre -development 1-yr, 24-hr peak Row
Post -development 1-yr, 24-hr peak flow
Storage volume discharge rate (through discharge orifice or weir)
Storage volume drawdown time
Additional Information
Vegetated side slopes
Vegetated shelf slope
Vegetated shelf width
Length of fiowpath to width rate
Length to width ratio
Trash rack for overflow & onficeo
Freeboard provided
Vegetated filter provided?
Recorded drainage easement provided?
Capures all runoff at ultimate build-0ut?
Drain mechanism for maintenance or emergencies
Form SW401-Wet Detention Besm-Rev.5
„8,967�R
4,420 flz
i '-.'8.70,(unitless)
PA%=i'n g9;590:RZ OK
OK
19.4% % OK
8.70 (unitless)
or N)
or N)
(Y or N)
in
in2
(unitless)
ft
(Y or N)
(unitless)
or N)
or N)
or N)
or N)
OK
OK
OK
OK
OK
OK
OK
OK
OK, draws down in 2-5 days.
OK, drawdown time is correct
OK
OK
OK
OK
OK
OK
OK
OK
Insufficient. Recorded drainage easement required.
OK