SW6091201_Cover Letter & Permit_20091209

NCDENR.
North Carolina Department of Environment and Natural Resources
Division of Water Quality.
Beverly Eaves Perdue Coleen H. Sullins
Governor
Director
December 9, 2009
Dee Freeman
Secretary
Tim Kinlaw, Associate Superintendent of Auxilary Services } r
Cumberland County Board of Education 1
P.O. Box 2357
Fayetteville, North Carolina C�� 1 5 209
Subject: Stormwater Permit No. SW6091201 p-'fit, IT' 111
Cashwell Elementary School Addition - OFRCE
High Density Commercial Infiltration Basin Project
Cumberland County
Dear Mr. Kinlaw
The Stormwater Permitting Unit received a complete Stormwater Management Permit Application
for Cashwell Elementary School Addition on December 3, 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. SW6091201, dated December 9, 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 8, 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 r . Dmwer.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 Fayetteville Regional Office. if you have any questions, or
need additional information concerning this matter, please contact Mike Randall at [phone];
or [e-mail].
Sincerely,
for Coleen H. Sullins
cc: Fayetteville Regional Office
Central Files
SPU Files
Wetlands and Stormwater Branch One 1
1617 Mail Service Center, Raleigh, North Carolina 27699.1617 . NDrthCarollna
Location: 512 N. Salisbury St. Raleigh, North Carolina 27604
Phone: [phone] FAX: [phone] Customer Service: 1-877-623-6748 Naturally
Internet: wvv✓.ncwaterquality.org
An Equal Opportunity l A(frmalive Action Employer

State Stormwater Permit
Permit No. SW6091201
STATE OF NORTH CAROLINA
DEPARTMENT OF ENVIRONMENT AND NATURAL RESOURCES
DIVISION;OF WAT.ER'QUALITY
I
STATE STORMWATER MANAGEMENT PERMIT,
HIGH DENSITY DEVELOPMENT
15 Kk39
-,- C° CF II
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
Tim Kinlaw, Associate Superintendent of Auxilary Services
Cumberland County Board of Education
Cashwell Elementary School Addition
2980 Legion Road, Cumberland County
FOR THE
construction, operation and maintenance of one infiltration basin in compliance with the
provisions of Session Law 2006-246 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 December 8, 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.
2. This stormwater system has been approved for the management of stormwater
runoff as described in Section 1.8 on page 3 of this permit. The stormwater
control has been designed to handle the runoff from 25,265 square feet of
impervious area.
3.
4
This basin was designed to infiltrate the 10 year — 24 hour volume in lieu of
providing a vegetated filter.
The tract will be limited to the amount of built -upon area indicated in Section 1.8
on page 2 of this permit, and as shown on the approved plans.
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.
Page 1 of 4

State Stormwater Permit
Permit No. SW6091201
6. The runoff from all built -upon area within the permitted drainage area of this
project must be directed into the permitted stormwater control system.
7. The built -upon areas associated with this project shall be located at least 30 feet
landward of all perennial and intermittent surface
waters.
8: The.following design criteria have been permitted
for the infiltration basin and
must be provided and maintained at design
condition:
a. Drainage Area, 9cres:
1.01
Onsite, ft :
43,996
Offsite, ft2:
0
b. Total Impervious Surfaces, ft2:
25,265
Onsite, ft. :
25,265
Offsite, ft2:
0
G. Design Storm, inches:
5.52 (10 year — 24 hour)
d Bottom Elevation, FMSL:
212.50
f. Bottom Surface Area, ft2:
1,389
h. Permitted Storage Volume, ft3:
13,123
i. Predevelopment 1 year 24 hour:
0.04
j. Post -development 1 year 24 hour:
0.08
k. Type of Soil:
Sand
I. Expected Infiltration Rate, in/hr:
24.70
M. Seasonal High Water Table, FMSL:
209.33
n. Time to Draw Down:
2. days
II. SCHEDULE OF COMPLIANCE
The stormwater management system shall be constructed in its entirety,
vegetated and operational for its intended use prior to the construction of any
built -upon surface. .
2. During construction, erosion shall be kept to a minimum and any eroded areas of
the system will be repaired immediately.
3. The permittee shall at all times provide the operation and maintenance
necessary to assure the permitted stormwater system functions at optimum
efficiency. The approved Operation and Maintenance Plan must be followed in its
entirety and maintenance must occur at the scheduled intervals including, but not
limited to:
a. Semiannual scheduled inspections (every 6 months).
b. Sediment removal.
C. Mowing and revegetation of slopes and the vegetated filter.
d. Immediate repair of eroded areas.
e. Maintenance of all slopes in accordance with approved plans and
specifications.
f. Debris removal and unclogging`of bypass structure, infiltration media, flow
spreader, catch basins, piping and vegetated filter.
g. A clear access path to the bypass 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.
Page 2 of 4

State Stormwater Permit
Permit No. SW6091201
6. The facilities shall be constructed'as shown on the approved plans. This permit -
shall become voidable unless the'facilities are constructed in accordance with the
conditions of this permit the approved"plans and specifications, and.other
supporting data.r.
7. If the stormwater system was used as an Erosion Control device, it must be
restored to design condition prior to operation as a stormwater treatment device,
and prior to occupancy of the facility.
8. 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. Access to the stormwater facilities shall be maintained via appropriate
easements at all times.
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 permittee shall submit final site layout and grading plans for any permitted
future areas shown on the approved plans, prior to construction.
12. A copy of the approved plans and specifications shall be maintained on file by
the Permittee for a minimum of ten years from the date of the completion of
construction.
13. The Director may notify the permittee when the permitted site does not meet one
or more of the minimum requirements df 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.
Page 3 of.4

State Stormwater Permit
Permit No. SW6091201
III. GENERAL CONDITIONS
1.. This permit is not transferable to any person or entity 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 the
appropriate documentation as listed on page 2 of the form. 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.
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.
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 reissuance or
termination does not stay any permit condition.
8. Unless specified elsewhere, permanent seeding requirements for the stormwater
controls 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.
12. The permittee shall submit a renewal request with all required forms and
documentation at least 180 days prior to the expiration date of this permit.
Permit issued this the 9th day of December, 2009.
NORTH CAROLINA ENVIRONMENTAL MANAGEMENT COMMISSION
Jor uoieen m. sumns, uirecror
Division of Water Quality
By Authority of the Environmental Management Commission
Page 4 of 4

State Stormwater Permit
Permit No. SW6091201
Cashwell Elementary School Addition
Cumberland County
Designer's Certification t' ,
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,
Cashwell Elementary School Infiltration Basin
(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 1 of 2

State Stormwater Permit
Permit No. SW6091201
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 bypass structure weir elevation is per the approved plan.
6. The bypass structure is located per the approved plans.
7. A Trash Rack is provided on the 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. All required design depths are provided.
13. All required parts of the system are provided.
14. The required system dimensions are provided per the approved plans.
cc: NCDENR-DWQ Regional Office
Page 2 of 2