SW3091001_Cover Letter & Permit_20091214

A
I ISENR
North Carolina Department of Environment and Natural Resources
Division of Water Quality
Beverly Eaves Perdue Coleen H. Sullins
Governor Director
December 14, 2009
Dee Freeman
Secretary
Ms. Patty Munns
Senior Vice President Facilities Services
State Employees Credit Union
1000 Wade Ave, DEC
Raleigh, North Carolina 27605 I C 2M
Subject: Stormwater Project No. SW3091001
High Density Commercial Bio-Retention Project
State Employees Credit Union, Mint Hill, North Carolina
Dear Ms. Munns:
The Stormwater Permitting Unit received a complete Stormwater Management Permit Application
for the State Employees Credit Union on December 2, 2009. Staff review of the plans and specifications
has determined that the project, as proposed, will comply with the Stormwater Regulations set forth in Title
15A NCAC 2H.1000 and Session Law 2006-246. We are forwarding Permit No. SW3091001, dated
December 14, 2009, for the construction, operation and maintenance of the subject project and the
stormwater BMPs.
This permit shall be effective from the date of issuance until December 13, 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 inspection and
maintenance of the stormwater management system will result in future compliance problems.
If any parts, requirements, or limitations contained in this permit are unacceptable, you have the
right to request an adjudicatory hearing upon written request within thirty (30) days following receipt of this
permit. This request must be in the form of a written petition, conforming to Chapter 150B of the North
Carolina General Statutes, and filed with the Office of Administrative Hearings, P.O. Drawer 27447,
Raleigh, NC 27611-7447. Unless such demands are made this permit shall be final and binding.
This project will be kept on file at the Mooreville Regional Office. If you have any questions, or
need additional information concerning this matter, please contact Dike Randall at [phone]; or
[e-mail].
Sincerely,
for Coleen H. Sullins
cc: Mooresville Regional Office
Central Files
SPU Files
Wetlands and Stormwater Branch
1617 Mail Service Center, Raleigh, North Carolina 27699.1617 ne
*1!^',li
Location: 512 N. Salisbury SL Raleigh, North Carolina 27604 1 V Carolina
Phone: [phone] FAX: [phone] Customer Service: 1-877.623.6748
Internet www.ncwaterquality.org atll�1aa�/!ji
An Equal Opportunity \ Affirmative Action Employer [� l�

State Stormwater Permit
Permit No. SW3091001
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
Patty Munns
State Employees' Credit Union
11529 Lawyers Road, Mint Hill, Union County
FOR THE
construction, operation and maintenance of two bioretention cell(s) in compliance with
the provisions of Session Law 2006-246 and 15A. NCAC 2H .1000 (h1ereafter referre
as the "stormwater rules') and the approved stormwater management plans and d to
specifications and other supporting data as attached and on file with and approved b
the Division of Water Quality and considered a part of this permit. p y
This permit shall be effective from the date of issuance until December 13, 2009 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 supportingater
data. .
2. This stormwater system has been approved for the mans
runoff as described in this permit. Bement of stormwater
3. The tract will be limited to the amount of built -upon area as indicated in Section
1.7 of this permit, and per the application documents and as shown on the
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 30 fe
landward of all perennial and intermittent surface waters. et
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State Stormwater Permit
Permit No. SW3091001.,
7.
The following design criteria have been provided in the bioretention cell and must
be maintained at design condition:
Drainage Area number:
a. Drainage Area, 2cres:
Onsite, ft
Offsite, ft2: 2.
b. Total Impervious Surfaces, ft .
Onsite, ft :
Offsite, ft2:
C. Design Storm, inches:
d. Max. Ponded Depth, inches:
e. Seasonal High Water Table, fmsl:
f. Planting Media Depth, feet:
g. Cell Dimensions, feet:
h. Bottom Elevation, fmsl:
i. Surface Area top of cell, ft2:
Permitted Storage Volume, ft':
Bypass / Storage Elevation, fmsl:
I. Predevelopment 1 year 24 hour:
M. Post development 1 year 24 hour:
n. Drawdown Time, hours:
o. Receiving Stream/River Basin:
p. Stream Index Number/Class
II. SCHEDULE OF COMPLIANCE
1. The stormwater management system shal
vegetated and operational for its intended
built -upon surface.
1A 1B
1.8
0.861
78,557
37,514
0
0
47,699
25,232
479699
25,232
0
0
2.6
2.6
6.6
7.2
760
762
2.09
3.58
69x145
29x112
766.41
766.92
10,002
51731
99264.0
40943
769.25
771.30
0.200
0.160
3.620
2.020
24
24
Goose Creek / Yadkin & Catawba
13-17-18 / "C"
I be constructed in its entirety,
use prior to the construction of any
2. During construction, erosion shall be kept to a minimum and any eroded areas of
the system will be repaired immediately.
3. The permittee shall at all 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 filter strip.
d. Immediate repair of eroded areas.
e. Maintenance of all slopes in accordance with approved plans.
f. Debris removal and unclk, flging of all drainage structures, level spreader,
filter media, planting medi`.i, underdrains, catch basins and piping.
g. Access to the cell and outlet structure must be available at all times.
4. Records of maintenance activities must be kept for each permitted BMP: The
reports 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 and inspection records for each BMP. The report
shall summarize the inspection dates, results of the inspections, and the
maintenance work performed at each inspection.
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A
State Stormwater Permit
Permit No. SW3091001
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.
M
7.. Upon completion of construction, prior to issuance of a Certificate of Occupancy,
and prior to operation of this permitted facility, a certification must be received y,
from an appropriate desigper for the system installed certifying that the permitted
facility has been installed in accordance with this er ' p mit, the approved plans and
specifications, and other supporting documentation. Any deviations from the
approved plans and specifications must benoted on the Certification. A
modification may be required for those deviations.
8. If the stormwater system was used as an Erosion Control device it m
ust be
restored to design condition prior to operation as a stormwater treatment device
and prior to occupancy of the facility.
9• Access to the stormwater facilities shall be maintained via appropriate recorded
easements at all times.
10. The permittee shall submit to the Director and shall have received approval
revised plans, specifications, and calculations prior to construction, for
for an
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
f• Filling in, altering, or piping of any vegetative conveyance oYnve anroval was sought.,
approved plan. ce shown on the
11. The permittee shall submit final site layout and grading plans for an ermitted
future areas shown on the approved plans, prior to construction. y p
12• A copy of the aptheproved plans and specifications shall be maintained on file b y
Permittee for a minimum of ten years from the date of the completion of
construction.
13. The Director may notify the permittee when the permitted site does not meet one
or more of the minimum requirements of the permit. within the time frame
specified in the notice, the permittee shall submit a written time schedule to the.
Director for modifying the site to meet minimum requirements. The permittee
shall provide copies of revised plans and certification in writing to the Director
that the changes have been made.
III. GENERAL CONDITIONS
1. This permit is not transferable 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 signed by both parties, to the
Division of Water Quality, accompanied by the supporting documentation. The
approval of this request will be considered on its merits and may
approved. itY or may not be
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State Stormwater Permit
Permit No. SW3091001
2. The permittee is responsible for compliance with all permit conditions until such
time as the Division approves a request to transfer the permit.
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 in writing of any name, ownership or
mailing address changes at least 30 days prior to making such changes.
ma g 9 . ,
12. The permittee shall submit a renewal request with all required forms and
docum
entation at least 180 days prior to the expiration date of this permit.
Permit issued this the 10 day of December, 2009.
NORTH CAROLINA ENVIRONMENTAL MANAGEMENT COMMISSION
for yoieen ri. ziumns, virmavi
Division of Water Quality
By Authority of the Environmental Management Commission
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