HomeMy WebLinkAboutSW8020908_CURRENT PERMIT_20030212STORMWATER DIVISION CODING SHEET
POST -CONSTRUCTION PERMITS
PERMIT NO. SW �-7P) /l �ilT
I DOC TYPE CURRENT PERMIT
`❑ APPROVED PLANS
❑ HISTORICAL FILE
❑ COMPLIANCE EVALUATION INSPECTION
DOC DATE �v�jOdlrih
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OF W A T&-
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Mr, Joseph Barwick, President
Carteret Community College
3305 Arendell Street
Morehead City, NC 28557
Dear Mr. Barwick:
Michael F. Easley, Governor
William G. Ross, Jr., Secretary
North Carolina Department of Environment and Natural Resources
Alan W. Klimek, P.E., Director
Division of Water Quality
Wilmington Regional Office
February 12, 2003
Subject: Permit No. SW8 020908
Wayne West and Marine Technology Buildings
High Density'Stormwater Project
Carteret County
The Wilmington Regional Office received a complete Stormwater Management Permit
Application for Wayne West and Marine Technology Buildings on February 11, 2003. Staff
review of the plans and specifications has determined that the project, as proposed, will comply
with the Stormwater Regulations set forth in Title 15A NCAC 2H.1000. We are forwarding
Permit No. SW8 020908 dated February 12, 2003, for the construction of Wayne West and
Marine Technology Buildings.
This permit shall be effective from the date of issuance until February 12, 2013, and shall be
subject to the conditions and limitations as specified therein. Please pay special attention to the
Operation and Maintenance requirements in this permit. Failure to establish an adequate system
for operation and maintenance of the stormwater management system will result in future
compliance problems.
If any parts, requirements, or limitations contained in this pennit 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
pen -nit shall be final and binding.
If you have any questions, or need additional information concerning this matter, please contact
Linda Lewis, or me at (910) 395-3900.
Sincerely, L
Rick Shiver
Water Quality Regional Supervisor
RSS/arl: S:1WQSISTORMWATIPERMIT1020908.FEB 03
cc: Vincent Chirichella, P.E.
Morehead City Building Inspections
Division of Coastal Management
Linda Lewis
Wilmington Regional Office
Central Files ANA
NCDEN t
N.C. Division of Water Quality 127 Cardinal Drive Extension Wilmington, N.C. 28405 (910) 395-3900 Fax (910) 350-2004 Customer Service
800-623-7748
State Storn3Nvater Management SvstenlS
Permit No. SWS 02090S
STATE OF NORTH CAROLINA
DEPART.NIENT OF ENVIRONMENT AND NATURAL RESOURCES
DIVISION OF \'VATER QUALITY
STATE STORIVIWATER 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
Carteret Contnnnrity College
Wayne West and Marine Technology Buildings
Carteret County
FOR THE
construction, operation and maintenance of an infiltration basin in compliance with the
provisions of 15A NCAC 2H .1000 (hereafter referred to as the "stormwater rules') and the
approved stormwater management plans and specifications and other supporting data as attached
and on file with and approved by the Division of Water Quality and considered a part of this
permit.
This permit shall be effective from the date of issuance until February 12, 2013, and shall be
subject to the following specified conditions and limitations:
I. DESIGN STANDARDS
l . This permit is effective only with respect to the nature and volume of stormwater
described in the application and other supporting data.
2. This stormwater system has been approved for the management of stormwater runoff as
described on page 3 of this permit, the Project Data Sheet. The stormwater control has
been designed to handle the runoff from 129,113 square feet of impervious area. The
excess desi4n storm must pass through a 50' vegetated filter prior to discharge.
3. The tract will be limited to the amount of built -upon area indicated on page 3 of this
permit, and per approved plans.
4. All stormwater collection and treatment systems must be located in either dedicated
common areas or recorded easements. The final plats for the project will be recorded
showing all such required easements, in accordance.with the approved plans.
5. The runoff from all built -upon area within the permitted drainage area of this project must
be directed into the permitted stormwater control system. A permit modification must be
submitted and approved prior to the construction of additional built -upon area from
outside of the approved drainage area.
2
State Stonnwater Manai-,ement Svstems
Permit No. SWS 020905
10. The pennittce shall submit final site layout and grading plans for any permitted future
areas shown on the approved plans, prior to construction. if the proposed BUA exceeds
the amount permitted under this permit, a modification to the permit must be submitted
and approved prior to construction.
11. 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.
12. Prior to the sale or lease of any portion of the property, the permittee,shall notify DWQ
and provide the name, mailing address and phone number of the purchaser or leasee. An
access/maintenance easement to the stormwater facilities shall be granted in favor of the
permittee if access to the stormwater facilities will be restricted by the sale or lease of any
portion of the property.
13. The permittee must maintain compliance with the proposed built -upon area and ensure
that the runoff from all the built -upon is directed into the permitted system.
14. 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 Fhe changes have been made.
15. The permittee must maintain the current permitted drainage area. No additional runoff
from outside of the permitted drainage area boundary may enter the permitted stormwater
facilities without first applying for and receiving a permit modification.
16. The storage pond may not infiltrate. A clay liner must be provided in the storage pond.
III. GENERAL CONDITIONS
This permit is not transferable. In the event there is a desire for the facilities to change
ownership, or there is a name change of the Permittee, a formal permit transfer request
must be submitted to the Division of Water Quality accompanied by an application fee,
documentation from the parties involved, and other supporting materials as may be
appropriate. The approval of this request will be considered on its merits and may or may
not be approved. The permittee is responsible for compliance with all permit conditions
until such time as the Division approves the transfer request.
2. Failure to abide by the conditions and limitations contained in this permit may subject the
Permittee to enforcement action by the Division of Water Quality, in accordance with
North Carolina General Statute 143-215.6A to 143-215.6C.
3. The issuance of this permit does not preclude the Permittee from complying with any and
all statutes, rules, regulations, or ordinances which may be imposed by other government
agencies (local, state, and federal) which have jurisdiction.
4. In the event that the facilities fail to perform satisfactorily, including the creation of
.nuisance conditions, the Permittee shall take immediate corrective action, including those
as may be required by this Division, such as the construction of additional or replacement
stormwater management systems.
5. The permittee grants DENR Staff permission to enter the property during normal business
hours for the purpose of inspecting all components of the permitted stormwater
management facility.
6. 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.
5
State Stormwater Management Systems
Pen11it..No -.-,,S,\ 8 02090Sr . - .=-.
Un€ess 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.
Approved plans and specifications for this project are incorporated by reference and are
enforceable parts of the permit.
9. The permittee shall notify the Division any name, ownership or mailing address chancres
within 30 days.
Permit issued this the 12th day of February, 2003.
NORTH CAROLINA ENVIRONMENTAL MANAGEMENT COMMISSION
Alan W. Klimek, P.E., Director
Division of Water Quality
By Authority of the Environmental Management Commission
Z
State Stormwater Management Systems
Permit No. S\V8 020908
Wayne West and Marine Technology Buildings
Stornrnvater Permit No. SWS 02090S
Carteret County
Designer's Certification
as a duly registered
4.
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
7
0
Certification Requirements:
State Stonzi\N'ater Managemeiit Systems
Permit No. SNVS 02090S
_1. The drainage area to the system contains approximately the permitted acreage.
?. The drainage area to the system contains no more than the permitted amount of
built -upon area.
3. All the built -upon area associated with the project is graded such that the runoff `
drains to the system.
4. The outlet/bypass structure elevations are per the approved plan.
S. The outlet structure is located per the approved plans.
6. Trash rack is provided on the outlet/bypass structure.
7. All- slopes are grassed with permanent vegetation.
8. Vegetated slopes are no steeper than 3:1.
9. The inlets are located per the approved plans and do not cause short-circuiting of
the system.
10. The permitted amounts of surface area and/or volume have been provided.
11. Required drawdown devices are correctly sized per the approved plans.
12. All required design depths are provided.
13. All required parts of the system are provided, such as a vegetated shelf, and a
forebay.
14-. The overall dimensions of the system, as shown on the approved plans, are
provided.
cc: NCDENR-DWQ Regional Office
Morehead City Building Inspections
OFFICE USE ONLY
Date Received
Fee Paid
Permit Number
11
--6--02 A , IZ 1q-a2
-$¢ZO60 oo0015&o
1 Sw8 020908
State of North Carolina
Department of Environment and Natural Resources
Division of Water Quality
STORMWATER MANAGEMENT PERMIT APPLICATION FORM
This form may be photocopied for use as an original
I. GENERAL INFORMATION
1. Applicants name (specify the name of the corporation, individual, etc. who owns the project):
Carteret Community College
2. Print Owner/Signing Official's name and title (person legally responsible for facility and compliance):
Joseph Barwick, President
3. Mailing Address for person listed in item 2 above:
3305 Arendell Street
City: Morehead City State: NC Zip:
28557-2989
Telephone Number: ( 252 } 222-61,40 —
h. Project Name (subdivision, facility, or establishment name - should be consistent with project name on plans,
specifications, letters, operation and maintenance agreements, etc.):
Carteret Community College
Additions & Renovations
S. Location of Project (street address):
3305 Arendell Street
City: Morehead City County:___Carteret
6. Directions to project (from nearest major intersection):
North on Atlantic Beach Causeway, Left onto Highway
70 leading West,
Left onto College Circle.
7. Latitude: N340 43.4' Longitude: W760 45.5 `
of project
8. Contact person who can answer questions about the project:
Name: Vincent Chirichella Telephone Number: L9191 )
3 8 0 — 8 7 5 0
II. PERMIT INFORMATION:
1. Specify whether project is (check one)
X New
Renewal Modification
Form SWU-101 Version 399 Page I of 4
2. If this application is being submitted as the result of a renewal or modification to an existing permit, list the
existing permit number and its issue date (if known)
3. Specify the type of project (check one):
Low Density X High Density Redevelop General Permit Other
4. Additional Project Requirements (check applicable blanks):
_CAMA Major X Sedimentation/Erosion Control 404/401 Permit NPDES Stormwater
Information on required state permits can be obtained by contacting the Customer Service Center at
1-877-623-6748.
III. PROJECT INFORMATION
1. in the space provided below, summarize how stormwater will be treated. Also attach a detailed narrative
(one to two pages) describing stormwater management for the project .
T' , r, F 1 }i
First 1z.%of rainfall will be captured in sedimentation/detention
basin to then be pumped to an infiltration basin. All other stormwater
will bypass into a 50' vegetated filter to then discharge into Bogue
Sound. -- -
2. Stormwater runoff from this project drains to the White Oak River basin.
3. Total Project Area: 8.986 acres 4. Project Built Upon Area: 39.3 %
5. How many drainage areas does the project have? 1 '
6. Complete the following information for each drainage area. If there are more than two drainage areas in the
project, attach an additional sheet with the information for each area provided in the same format as below.
.Basin Information ''
Drainage Area 1
Drainage Area 2 ` _
Receiving Stream Name
Bogue Sound
Receiving Stream Class
SA
Drainage Area
232,665 sq. ft.
Existing Impervious` Area
15,689 s q. f t.
Proposed Impervious`Area
113,424 s q. f t.
% Impervious" Area (total)
55.3 %
Impervious*.Surface Area ,
Drainage Area 1
Drainage Area 2'! .
On -site Buildings
56,402 sq.' ft.'
On -site Streets
______________
On -site Parking
57,439 sq . f t .
On -site Sidewalks
7,677 sq . f t .
Other on -site
7,595 s q. f t.
Off -site
__________________
Total: 129,113 s q . f t .
Total:
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 3.99 Page 2 of 4
7. How was the off -site impervious area listed above derived? Delineation of site survey With
field verification.
IV. DEED RESTRICTIONS AND PROTECTIVE COVENANTS
The following italicized deed restrictions and protective covenants are required to be recorded for all
subdivisions, outparcels and future development prior to the sale of any lot. If lot sizes vary significantly, a table
listing each lot number, size and the allowable built -upon area for each lot must be provided as an attachment.
1. The following covenants are intended to ensure ongoing compliance with state stormwater management permit number
as issued by the Division of Water Quality. These covenants may not be
changed or deleted without the consent of the State.
2. - No more than square feet of any lot shall be covered by structures or impervious materials.
Impervious materials include asphalt, gravel, concrete, brick, stone, slate or similar material but do not include wood
decking or the water surface of swimming pools. ..
3: Swales shall not be filled in, piped, or altered except as necessary to provide driveway crossings.
4. Built -upon area in excess of the permitted amount requires a state stormwater management permit modification prior to
construction.
5. All permitted runoff from outparcels or future development shall be directed into the permitted stormwater control
system. These connections to the stormwater control system shall be performed in a manner that maintains the integrity
and performance of the system as permitted.
By your signature below, you certify that the recorded deed restrictions and protective covenants for this project
shall include all the applicable items required above, that the covenants will be binding on all parties and persons
claiming under them, that they will run with the land, that the required covenants cannot be changed or deleted
without concurrence from the State, and that they will be recorded prior to the sale of any Iot.
V. SUPPLEMENT FORMS
The applicable state stormwater management permit supplement form(s) listed below must be submitted for each
BMP specified for this project. Contact the Stormwater and General Permits Unit at (919) 733-5083 for the status
and availability of these forms.
Form SWU-102
Wet Detention Basin Supplement
Form SWU-103
Infiltration Basin Supplement
Form SWU-104
Low Density Supplement
Form SWU-105
Curb Outlet System Supplement
Form SWU-106
Off -Site System Supplement
Form SWU-107
Underground Infiltration Trench Supplement
Form SWU-108
Neuse River Basin Supplement
Form SWU-109
Innovative Best Management Practice Supplement
Form SWU-101 Version 3.99 Page 3 of 4
VI. SUBMITTAL REQUIREMENTS
Only complete application packages will be accepted and reviewed by the Division of Water Quality (DWQ).
A complete package includes all of the items listed below. The complete application package should be
submitted to the appropriate DWQ Regional Office.
1. Please indicate that you have provided the following required information by initialing in the space provided
next to each item.
• Original and one copy of the Storinwater Management Permit Application Form
• One copy of the applicable Supplement Form(s) for each BMP
• Permit application processing fee of $420 (payable to NCDENR)
• Detailed narrative description of stormwater treatment/management
• Two copies of plans and specifications, including:
- Development/Project name
Engineer and firm
Legend
- North arrow
- Scale
Revision number & date
Mean high water line
Dimensioned property/project boundary
Location map with named streets or NCSR numbers
Original contours, proposed contours, spot elevations, finished floor elevations
Details of roads, drainage features, collection systems, and stormwater control measures
Wetlands delineated, or a note on plans that none exist
Existing drainage (including off -site), drainage easements, pipe sizes, runoff calculations
- Drainage areas delineated
- Vegetated buffers (where required)
VII. AGENT AUTHORIZATION
If you wish to designate authority to another individual or firm so that they may provide information on your
behalf, please complete this section.
Designated agent (individual or firm): Stei-rart Engineering, Inc. (Attn: Vince Chirichella)
Mailing Address: P.O. Box 1 2-054
City: Research Triangle Par'c State: NC Zip: '27-709
Phone:( 919 ) 380-8750 Fax: 919 380-8752
VIII. APPLICANT'S CERTIFICATION
I, (print or type name of person listed in Genera! Information, item 2)
Joseph Bandcic
certify that the information included on this permit application form is, to the best of my knowledge, correct and
that the project will be constructed in conformance with the approved plans, that the required deed restrictions
and protective covenants will be recorded, and that the proposed project complies with the requirements of 15A
NCAC 2H .1000\
i Signature:
Date: F.o)6-0
Form SWU-101 Version 3.99 Page 4 of 4
Permit No. SW8 020908
(to be provided by DWQ)
State of North Carolina
Department of Environment and Natural Resources
Division of Water Quality
STORMWATER MANAGEMENT PERMIT APPLICATION FORM
INFILTRATION BASIN SUPPLEMENT
This form may be photocopied for use as an original
DWO Stormwater Management Plan Review:
A complete stormwater management plan submittal includes a stormwater management permit application, an
infiltration basin supplement for each system, design calculations, soils report and plans and specifications
showing all stormwater conveyances and system details.
1. PROJECT INFORMATION
ProiectName: Carteret Community College Additions & Renovations
Contact Person: A.T. Rhu e Phone Number: (2 5 2 ) 22 2 -- 619 8
This worksheet applies to: Basin No.
1
(as identified on plans)
in Drainage Area 1 .
(from Ponn SWU-tot)
11. DESIGN INFORMATION - Attach supporting calculations/documentation. The soils report must be
based upon an actual field investigation and soil borings. County soil maps are not an acceptable source
of soils information. All elevations shall be in feet mean sea level (fmsl).
Soils Report Summary
Soil Type
Infiltration Rate
SHWT Elevation
Basin Design Parameters
Design Storm
Design Volume
Drawdown Time
Basin Dimensions
Basin Size
Basin Volume Provided
Basin Elevations
Bottom Elevation
Storage Elevation
Top Elevation
Wando
3 in/hr or eflhr/sf (circle appropriate writs)
10.0 fmsl (Seasonal High Water Table elevation)
1.5
inch (I.S inclr event for SA raters, 1 inch event for others)
15,925 c.f.
4.5 days
ft. x
16,011 c.f.
18.00 fmsl
20.90 fmsl
21.00 fmsl
ft. = 4 , 239 sq. ft. (bortoin dimension+)
Form SWU-103 Rev 3.99 Page 1 of 3
III. REQUIRED ITEMS CHECKLIST
®The following checklist outlines design requirements per the Stormwater Best Management Practices Manual
(N.C. Department of Environment, Health and Natural Resources, February 1999) and Administrative Code
Section: 15 A NCAC 2H .1008.
Initial in the space provided to indicate that the following design requirements have been met and supporting
documentation is attached. If the applicant has designated an agent in the Stormwater Management Permit
Application Form, the agent may initial below. Attach justification if a requirement has not been met.
Applicants Initials
a. System is located 50 feet from class SA waters and 30 feet from other surface waters.
b. System is located at least 100 feet from water supply wells.
c. Bottom of system is at least 2 feet above the seasonal high water table.
d. Bottom of the system is 3 feet above any bedrock or impervious soil horizon.
e. System is not sited on or in fill material or DWQ approval has been obtained.
puewc
?APK&Nf. System is located in a recorded drainage easement for the purposes of operation and
maintenance and has recorded access easements to the nearest public right-of-way.
S66 Sotim q g. Drainage area for the device is less than 5 acres.
5EE i,loTt h. Soils have a minimum hydraulic conductivity of 0.52 inches per hour and soils report is
attached.iSo&L& Waver ATYA-ACD• AME"'OBo fWao r ?c,amiu .
• ii i. System captures and infiltrates the runoff from the first 1.0 inch of rainfall (1.5 inch event for
OV areas draining to SA waters ). Design volume and infiltration calculations attached.
j. System is sized to take into account the runoff at the ultimate built -out potential from all
surfaces draining to the system, including any off -site drainage. Calculations attached.
•
i
r-
All side slopes stabilized with vegetated cover are no steeper than 3:1 (H:V).
A pretreatment device such as a catch basin, grease trap, filter strip, grassed swale or
sediment trap is provided.
Bottom of the device is covered with a layer of clean sand to an average depth of 4 inches or
dense vegetative cover is provided.
Vegetated filter is provided for overflow and detail is shown on plans (Required minimum
length is 50 feet for SA waters, 30 feet for other waters).
Flow distribution mechanism within the basin is provided.
A benchmark is provided to determine the sediment accumulation in the pretreatment device.
Runoff in excess of the design volume bypasses off-line systems (bypass detail provided).
System is designed to draw down the design storage volume to the proposed bottom
elevation under seasonal high water conditions within five days. A soils report and till
pertinent draw -down calculations are attached.
Plans ensure that the installed system will meet design specifications (constructed or
restored) upon initial operation once the project is complete and the entire drainage area is
stabilized.
Form SWU-[03 Rev 3.99 Page 2 of 3
0
•
IV. INFILTRATION BASIN OPERATION AND MAINTENANCE AGREEMENT
1. After every runoff producing rainfall event and at least monthly inspect the infiltration system for erosion,
trash accumulation, vegetative cover, and general condition.
2. Repair eroded areas immediately, re -seed as necessary to maintain adequate vegetative cover, mow
vegetated cover to maintain a maximum height of six inches, and remove trash as needed.
3. After every runoff producing rainfall event and at least monthly inspect the bypass, inflow and overflow
structures for blockage and deterioration. Remove any blockage and repair the structure to approved design
specifications.
4. Remove accumulated sediment from the pretreatment system and infiltration basin annually or when depth
in the pretreatment unit is reduced to 75% of the original design depth. The system shall be restored to the
original design depth without over -excavating. Over -excavating may cause the required water table
separation to be reduced and may compromise the ability of the system to perform as designed. Removed
sediment shall be disposed of in an appropriate manner and shall not be handled in a manner that will
adversely impact water duality (i.e. stockpiling near a stormwater treatment device or stream, etc.).
A benchmark shall be established in the pretreatment unit. The benchmark will document the original
design depth so that accurate sediment accumulation readings can be taken. The measuring device used to
determine the depth at the benchmark shall be such that it will give an accurate depth reading and not
readily penetrate into accumulated sediments.
When the design depth reads 4 feet in the pretreatment unit, the sediment shall be
removed from both the pretreatment unit and the infiltration basin.
�5. If the Division determines that the system is failing, the system will immediately be repaired to original
design specifications. If the system cannot be repaired to perform its design function, other stormwater
control devices as allowed by NCAC 2H .1000 must be designed, approved and constructed.
I acknowledge and agree by my signature below that I am responsible for the performance of the five
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.
Print Name and Title:_ se-� _ru)'t c k ?TCS i cieri Ca�ereA l bmmkn
Address:,3505 MC,, hMA, C'%t IJ C a fss-] 1
Phone: (DSa) 0, f Y0 _ Date:___
Signatu
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, _U�� �, Sm. t a Notary Public for the State of 00(4\ Caro�If\0 , County of
CarA e.fe a- do hereby certify that J Se, af-u. U personally appeared before me this a�
day of + , and acknowledge the due execution of the forgoing infiltration basin maintenance requirements.
vditness my ha'd and official seal,
SEAL - My commission expires
Form S W O-103 Rev 3.99 Page 3 of 3
W ATFR Michael F. Easley, Governor
�a Q William G. Ross Jr., Secretary
' G North Carolina Department of Environment and Natural Resources
co y
> Alan W. Klimek, P.E.,Director
Division of Water Quality
Coleen H. Sullins, Deputy Director
Division of Water Quality
February 27, 2004
Mr. Joseph Barwick, President
Carteret Community College
3305 Arendell Street
Morehead City, NC 28557
Subject: Permit No. SW8 020908
Wayne West and Marine Technology Buildings
High Density Stormwater Project
Carteret County
Dear Mr. Barwick:
The Wilmington_ Regional Office received a complete, modified Stormwater
Management Permit Application for.Wayne West and Marine Technology Buildings on
February 13, 2004. Staff review of the plans and specifications has determined that the
project, as proposed, will comply with the Stormwater Regulations set forth in Title 15A
NCAC 2H.1000. We are forwarding Permit No. SW8 020908 dated February 27, 2004,
for the construction of Wayne West and Marine Technology Buildings.
This permit shall be effective from the date of issuance until February 27, 2014, 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 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.
If you have any questions, or need additional information concerning this matter, please
contact Linda Lewis, or me at (910) 395-3900.
Sincerely,
�c-- V-
Rick Shiver
Water Quality Regional Supervisor
RSSIarl: S:IWQSISTORUIWATIPERMIT1020908.feb04
cc: Vincent Chirichella, P.E., Stewart Engineering
Ron Cullipher, P.E., Stroud Engineering
Morehead City Building Inspections
Division of Coastal Management
Linda Lewis
Wilmington Regional Office
Central Files
N. C. Division of Water Quality 127 Cardinal Drive Extension (910) 395-3900 Customer Service
Wilmington Regional Office Wilmington, NC 28405 (910) 350-2004 Fax 1 800 623-7748 NCDENR
State Stormwater Management Systems
Permit No, SW8 0209n
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
Carteret Community College
Wayne West and Marine Technology Buildings
Carteret County
FOR THE
construction, operation and maintenance of an infiltration basin in compliance with the
provisions of 15A NCAC 2H .1000 (hereafter referred to as the "stormwater rules") and
the approved stormwater management plans and specifications and other supporting
data as attached and on file with and approved by the Division of Water Quality and
considered a part of this permit.
This permit shall be effective from the date of issuance until February 27, 2014, 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 Part 6 of this Section of the permit. The stormwater control
has been designed to handle the runoff from 135,864 square feet of impervious
area. The design storm in excess of 1.5" must pass through a 50' vegetated filter
prior to discharge.
3. The tract will be limited to the amount of built -upon area indicated on page 3 of
this permit, and per approved plans.
4. The runoff from all built -upon area within the permitted drainage area of this
project must be directed into the permitted stormwater control system. A permit
modification, must be submitted and approved prior to the construction of
additional built -upon area from outside of the approved drainage area.
5. The runoff will drain by gravity through two separate manholes, to an unlined
storage pond, where it will be pumped via a forcemain to the infiltration basin at a
maximum rate of 60 gpm. The storage elevation in the storage pond is elevation
9. The incoming runoff in excess of the 1.5" design storm in the storage pond will
flow over the bypass weirs and into the vegetated filter.
Page 2 of 8
State Stormwater Management Systems
Permit No. SW8 020908
6. The infiltration basin and storage pond must provide the following criteria, in
accordance with the design requirements:
a. Receiving Stream/index #: Bogue Sound WOK03 20-36-(8.5)
b. Classification of Water Body: "SA"
C. Proposed System: Infiltration Basin
wl separate storage pond
d. Drainage Area, acres: 5.34
Onsite, ft2: 232,665
Offsite, ft2: 0
e. Total Impervious Surfaces, ft2: 135,864
Infiltration Basin Storage Pond
f. Basin Depth, feet: 3.15 4.0
g. TSS removal efficiency: 85% (a 50' vegetated filter is required)
h. Bottom Elevation, FMSL: 17.75 5.0
i. Permitted Surface Area, ft2: 4,035 @17.75 15,902 @8.0
j. Permitted Storage Volume, ft3: 17,046— 16,795
k. Temporary Storage Elevation: 20.9 FMSL 9.0
I. Controlling Orifice: Bypass weir Pump to basin
M. Type of Soil: Wando
n. Expected Infiltration Rate: 3 inches per hour
o. Time to Draw Down: 4.5 days
P. Seasonal High Water Table Elevation: . 15.5 FMSL
II. SCHEDULE OF COMPLIANCE
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.
3. 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.
4. If the stormwater system is 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.
Page 3 of 8
State Stormwater Management Systems
Permit No. SW8 020908
5. 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 all vegetated 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 infiltration basin filter media, forcemain,
pump, outlet structure, orifice device, flow spreader, catch basins and
piping.
g. Access to the structures in the storage pond and infiltration basin must be
available at all times.
h. The pump to the infiltration basin must be maintained in good working
order.
6. Records of maintenance activities must be kept and made available upon
request to authorized personnel of DWQ. The records will indicate the date,
activity, name of person performing the work and what actions were taken.
7. A decorative spray fountain will be allowed in the storage pond, 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 the fountain's pump is based on the
permanent pool volume. The maximum pump power for a fountain in this
pond is 1/8 horsepower.
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. The permittee shall submit final site layout and grading plans for any permitted
future development areas shown on the approved plans, prior to construction. If
the proposed BUA exceeds the amount permitted under this permit, a -
modification to the permit must be submitted and approved prior to construction.
10. 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. -
11. The permittee must maintain compliance with the proposed built -upon area and
ensure that the runoff from all the built -upon is directed into the permitted
system.
Page 4 of 8
State Stormwater Management Systems
Permit No. SW8 020908
12. 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, but not
limited to, the Stormwater management measures, built -upon area,
details, grading, etc.
b. Project name change.
C. Transfer of ownership.
d. Redesign or addition to the approved amount of built -upon area or to the
drainage area.
e. Further subdivision, acquisition, or sale of the project area. The project
area is defined as all property owned by the permittee, for which
Sedimentation and Erosion Control Plan approval or a CAMA Major
permit was sought.
f. Filling in, altering, or piping of any vegetative conveyance shown on the
approved plan.
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.
14. The permittee must maintain the current permitted drainage area. No additional
runoff from outside of the permitted drainage area boundary may enter the
permitted stormwater facilities without first applying for and receiving a permit
modification.
111. MONITORING CONDITIONS
1. Three monitoring wells shall be installed to monitor the top of the water table,
factoring in the seasonal low. One shall be located up -gradient of the pond in an
undisturbed, natural area, and the other two down -gradient of the pond. The
wells will be monitored once a month (on approximately the same day of the
month) for a period of twelve months. Upon receipt of the permit, the monitoring
wells must be installed. Sample collection will begin the first of the month
following installation.
2.- The monitoring well samples will be tested for the following parameters using
generally accepted Standard methods:
a. Static water level to 0.01 feet, relative to land surface.
b. TSS
' c. Nitrates
d. Total Phosphorous
e. Fecal Coliform
3. Samples must be collected by either a certified Wastewater Treatment Facility
operator, or a similarly trained person.
4. Testing of the samples will be conducted by a State Certified Laboratory. Copies
of the lab sheets must be submitted to the Division within 30 days.
5. - The permittee shall submit quarterly reports to the Division of Water Quality,
which summarize the results of the previous three months of testing. The reports
are due within 30 days of receiving the last test results from the laboratory.
Page 5 of 8
State Stormwater Management Systems
Permit No. SW8 020909
6. The Division will analyze the data at the end of 12 months. Should the data,
reveal violations of groundwater or water quality standards, the storage pond will'
be lined with an impermeable lining material to be approved by the Division.
Should the data reveal only slight violations of groundwater or water quality
standards, the Division and the permittee shall meet to decide if the sampling
shall continue for another year, or if the requirement to line the pond can be
deleted.
IV. GENERAL CONDITIONS
1. This permit is not transferable except after notice to and approval by the Director.
In the event there is a desire for the facilities to change ownership, or there is a
name change of the Permittee, a formal "permit transfer request must be
submitted to the Division of Water Quality accompanied by an application fee,
documentation from the parties involved, and other supporting materials as may
be appropriate. The approval of this request will be considered on its merits and
may or may not be approved. The permittee is responsible for compliance with
all permit conditions until such time as the Division approves the transfer
request.
2. Failure to abide by the conditions and limitations contained in this permit may
subject the Permittee to enforcement action by the Division of Water Quality, in
accordance with North Carolina General Statute 143-215.6A to 143-215.6C.
3. The issuance of this permit does not preclude the Permittee from complying with
any and all statutes, rules, regulations, or ordinances which may be imposed by
other government agencies (local, state, and federal) which have jurisdiction.
4. In the event that the facilities fail to perform satisfactorily, including the creation
of nuisance conditions, the Permittee shall take immediate corrective action,
including those as may be required by this Division, such as the construction of
additional or replacement stormwater management systems.
5. The permittee grants DENR Staff permission to enter the property during normal
business hours for the purpose of inspecting all components of the permitted
stormwater management facility.
6. 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.
7. Unless specified elsewhere, permanent seeding requirements for the stormwater
control must follow the guidelines established in the North Carolina Erosion and
Sediment Control Planning and Design Manual'.
8. Approved plans and specifications for this project are incorporated by reference
and are enforceable parts of the .permit.
9. The permittee shall notify the Division any name, ownership or mailing address
changes within 30 days.
Permit issued this the 27th day of February, 2004.
NORTH CAROLINA ENVIRONMENTAL MANAGEMENT COMMISSION
Division of Water Quality
By Authority of the Environmental Management Commission
Page 6 of 8
State Stormwater Management Systems
Permit No. SW8 020908
Carteret Community College
Wayne West and Marine Technology Buildings
Stormwater Permit No. SW8 020908
Carteret 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. SW8 020908
Certification Requirements:
. The drainage area to the system contains approximately the permitted
acreage.
2. The drainage area to the system contains no more than the permitted
amount of built -upon area.
3. All the built -upon area associated with the project is graded such that the
runoff drains to the system.
4. The outlet/bypass structure elevations are per the approved plan.
5. The outlet structure is located per the approved plans.
6. Trash rack is provided on the outlet/bypass structure.
7. All slopes are grassed with permanent'vegetation.
8. Vegetated slopes are no steeper than 3:1.
9. The inlets are located per the approved plans and do not cause short-
circuiting of the system.
10. The permitted amounts of surface area and/or volume have been
provided.
11. Required drawdown devices are correctly sized per the approved plans.
12. All required design depths are provided.
13. All required parts of the system are provided, such as a vegetated shelf,
and a forebay.
1�. The overall dimensions of the system, as shown on the approved plans,
are provided.
cc: NCDENR-DWQ Regional Office
Morehead City Building Inspections
Page 8 of 8
.,rv.,"OFFICE-USE ONLY.:,"
Date Received
Fee Paid
Permit Number
Zij g v� q vS nL-
State of North Carolina
Department of Environment and Natural Resources
Division of Water Quality
STORMWATER MANAGEMENT PERMIT APPLICATION FORM
This form may be photocopied for use as an original
I. GENERAL INFORMATION
1. Applicants name (specify the name of the corporation, individual, etc. who owns the project):
Carteret -Community College
2. Print Owner/Signing Official's name and title (person legally responsible for facility and compliance):
Joseph Barwick, President
3. Mailing Address for Person listed in item 2 above:
3305 Arendell Street
City: Morehead City
Telephone Number: ( 252 ) 2 2 2— 614 0
State: NC
Zip: 28557-2989
4. Project Name (subdivision, facility, or establishment name -should be consistent with project name on plans,
specifications, letters, operation and maintenance agreements, etc.):
.Carteret Community College Additions and Renovations
5. Location of Project (street address):
.., .ry P,
3305 Arendell Street
City: Morehead City County: Carteret
6. _ Directions to project (from nearest major intersection): - = Causeway,-
Nnrt-.'h_on_AtlantJc Reach Left onto-...Hi"way 70 leading West
Loft onto College Circle.
7. Latitude: N 34Q 43 .4Longitude: W 7C 4 5 . 5 ' of project
8. Contact person who can answer questions about the project:
Name: Vince Chirichella Telephone Number: ( 919 ) 380-8750
II. PERMIT INFORMATION:
1. Specify whether project is (check one): New Renewal X Modification
Form SWU-101 Version 3.99 Page 1 of 4
2. If this application is being submitted as the result of a renewal or modification to an existing permit, list the
existing permit number SW8 020906 and its issue date (if known)
3. Specify the type of project (check one):
Low Density X High Density Redevelop
4. Additional Project Requirements (check applicable blanks):
General Permit Other
�CAMA Major X Sedimentation/Erosion Control _404/401 Permit NPDES Stormwater
Information on required state permits can be obtained by contacting the Customer Service Center at
1-877-623-6748.
III. PROJECT INFORMATION
1. In the space provided below, summarize how stormwater will be treated. Also attach a detailed narrative
(one to two pages) describing stormwater management for the project .
First 1 1/21, of rainfall will be captured in sedimentation/detention
basin. to',,then; be�--pumped to- an,-infiltrationTbasin. All other stormwater
will bypass into a 50' vegetated filter to then discharge into Boque
Sound.
2. Stormwater runoff from this project drains to the White 0 a k River basin.
3. Total Project Area: 8..986 acres 4. Project Built Upon Area: 41.0
5. How many drainage areas does the project have? 1
6. Complete the following information for each drainage area. If there are more than two drainage areas in the
project, attach an additional sheet with the information for each area provided in the same format as below.
Bas�ntInformationE �i�.Draina
e Area qn,a;
k
i'F EL':,ypDraina e�Areaµ2 :„1,w,'.'
Receiving Stream Name
Bogue Sound
Receiving Stream Class
SA
Drainage Area
232,665 ' sq. ft.
Existing Impervious` Area
15 , 6 89 - sq . f t .
Proposed Impervious*Area
f t . 35 g(�
%Impervious* Area (total)
58.4 %
m
Ipervtous5urface AreaM
Drainage Area'1 '�5�
,,,., x: a.b:: �, +,
.. M.
n{s •� D-" '' e `Area! ,
„ ,., ..
a, �,: g,�,.
On -site Buildings
56,402 s :ft .
On -site Streets
On -site Parking
62,536 s. f t.
On -site Sidewalks
9,331 s q. f t.
Other on -site
7,595 s q. f t.
Off -site
Total: 135,864 sq . f t .
Total:
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 3.99
Page 2 of 4
How was the off -site impervious area listed above derived? Deli neat ion of Site survey
with field verification.
IV. DEED RESTRICTIONS AND PROTECTIVE COVENANTS
The following italicized deed restrictions and protective covenants are required to be recorded for all
subdivisions, outparcels and future development prior to the sale of any lot. If lot sizes vary significantly, a table
listing each lot number, size and the allowable built -upon area for each lot must be provided as an attachment.
The following covenants are intended to ensure ongoing compliance with state stormwater management permit number
as issued by the Division of Water Quality. These covenants may not be
changed or deleted without the consent of the State.
2. No more than square feet of any lot shall be covered by structures or impervious materials.
Impervious materials include asphalt, gravel, concrete, brick, stone, slate or similar material but do not include wood
decking or the water surface of swimming pools.
3. Swales shall not be filled in, piped, or altered except as necessary to provide driveway crossings.
4. Built -upon area in excess of the permitted amount requires a state stormwater management permit modification prior to
construction.
S. All permitted runoff from outparcels or future development shall be directed into the permitted stormwater control
system. These connections to the stormwater control system shall be performed in a manner that maintains the integrity
and performance of the system as permitted.
By your signature below, you certify that the recorded deed restrictions and protective covenants for this project
shall include all the applicable items required above, that the covenants will be binding on all parties and persons
claiming under them, that they will run with the land, that the required covenants cannot be changed or deleted
without concurrence from the State, and that they will be recorded prior to the sale of any lot.
V. SUPPLEMENT FORMS
The applicable state stormwater management permit supplement form(s) listed below must be submitted for each
JMP specified for this project. Contact the Stormwater and Qenera_I Permits Unit at (919) 733-5083 for the status
and availability of these forms.
Form SWU-102
Wet Detention Basin Supplement
Form SWU-103
Infiltration Basin Supplement
Form SWU-104 '
Low Density Supplement
Form SWU-105
Curb Outlet System Supplement
Form SWU-106
Off -Site System Supplement
Form SWU-107
Underground Infiltration Trench Supplement
Form SWU-108
Neuse River Basin Supplement
Form SWU-109
Innovative Best Management Practice Supplement
Form SWU-101 Version 3.99 Page 3 of 4
1
VI. SUBMITTAL REQUIREMENTS
Only complete application packages will be accepted and reviewed by the Division of Water Quality (DWQ).
A complete package includes all of the items listed below. The complete application package should be
submitted to the appropriate DWQ Regional Office.
I. Please indicate that you have provided the following required information by initialing in the space provided
next to each item.
• Original and one copy of the Stormwater Management Permit Application Form
• One copy of the applicable Supplement Forni(s) for each BMP
• Permit application processing fee of $420 (payable to NCDENR)
• Detailed narrative description of stormwater treatment/management
• Two copies of plans and specifications, including:
- Development/Project name
- Engineer and firm
- Legend
- North arrow
Scale
Revision number & date
Mean high water line
- Dimensioned property/project boundary
Location map with named streets or NCSR nurnbers
- Original contours, proposed contours, spot elevations, finished floor elevations
- Details of roads, drainage features, collection systems, and stormwater control measures
- Wetlands delineated, or a note on plans that none exist
- Existing drainage (including off -site), drainage easements, pipe sizes, runoff calculations
- Drainage areas delineated
- Vegetated buffers (where required)
VII. AGENT AUTHORIZATION
If you wish to designate authority to another individual or firm so that they may provide information on your
behalf, please complete this section.
Designated agent(individualorfirm):Stewart Engineering, Inc. (Attn: Vince Chirichella)
Mailing Address: 260 - C Town Half. Drive
City: Morrisville State: NC Zip: 27560
Phone: ( 919 ) 380-8750 Fax: ( 919 ) 380-8752
VIII. APPLICANT'S CERTIFICATION
I,(printortype nameofpersonlisted inGeneral Information, item 2) Joseph Barwick
certify that the information included on this permit application form is, to the best of my knowledge, correct and
that the project will be constructed in conformance with the approved plans, that the required deed restrictions
and protective covenants will be recorded, and that the proposed project complies with the requirements of 15A
NCAC 2H ..1-0[
Signatu
Date: // - D % - 0A
l Form SWU-101 Version 3.99 Page 4 of 4
i
e
Permit No. 4) 3 U yD sr /x'01)
(to be provided by DWQ)
State of North Carolina
Department of Environment and Natural Resources
Division of Water Quality
STORMWATER MANAGEMENT PERMIT APPLICATION FORM
INFILTRATION BASIN SUPPLEMENT
This form may be photocopied for use as an original
DWQ_Stormwater Management Plan Review:
A complete stormwater management plan submittal includes a stormwater management permit application, an
infiltration basin supplement for each system, design calculations, soils report and plans and specifications
showing all stormwater conveyances and system details.
I. PROJECT INFORMATION
Project Name: Carteret Community College Additions & Renovations
Contact Person: A.T. Rhue Phone Number: (252) 222-6198
This worksheet applies to: Basin No. 1 in Drainage Area 1
(us idenrffied on ptuns) (from Farm SWU-101)
II. DESIGN INFORMATION - Attach supporting calculations/documentation. The soils report must be
based upon an actual field investigation and soil borings. County soil maps are not an acceptable source
of soils information. All elevations shall be in feet mean sea level (fmsl).
Soils Report Summary
Soil Type
Infiltration Rate
SH WT Elevation
Basin Design Parameters
Design Storm
Design Volume
Drawdown Time
Basin Dimensions
Basin Size
Basin Volume Provided
Basin Elevations
Bottom Elevation
Storage Elevation
Top Elevation
Wando
3 l/h or cflhrlsf (circle appropriate units)
15.50 fmsl (Seasonal High Water Table elevation)
1.5 inch (1.5 inch event for SA waters, 1 inch event for others)
16,736 c.f.
4 5 days
ft. x
17,046 c.f.
17.75
fmsl
20.90
fmsl
21.00
fmsl
ft. = 4,035 sq. ft. (bonoin diinensions)
Dorm SWU-103 Rcv 3.99 Page l of 3
III. REQUIRED ITEMS CHECKLIST
The following checklist outlines design requirements per the Stormwater Best Management Practices Manual
(N.C. Department of Environment, Health and Natural Resources, February 1999) and Administrative Code
Section: 15 A NCAC 214 .1008.
Initial in the space provided to indicate that the following design requirements have been met and supporting
documentation is attached. If the applicant has designated an agent in the Stormwater Management Permit
Application Form, the agent may initial below. Attach justification if a requirement has not been met.
APRlicants Initials
a.
b.
C.
d.
e.
System is located 50 feet from class SA waters and 30 feet from other surface waters.
System is located at least 100 feet from water supply wells.
Bottom of system is at least 2 feet above the seasonal high water table.
Bottom of the system is 3 feet above any bedrock or impervious soil horizon.
System is not sited on or in fill material or DWQ approval has been obtained.
System is located in a recorded drainage easement for the purposes of operation and
maintenance and has recorded access easements to the nearest public right-of-way.
Drainage area for the device is less than 5 acres.
Soils have a minimum hydraulic conductivity of 0.52 inches per hour and soils report is
attached.
System captures and infiltrates the runoff from the first 1.0 inch of rainfall (1.5 inch event for
areas draining to SA waters ). Design volume and infiltration calculations attached.
System is sized to take into account the runoff at the ultimate built -out potential from all
surfaces draining to the system, including any off -site drainage. Calculations attached.
k. All side slopes stabilized with vegetated cover are no steeper than 3:1 (H:V).
A pretreatment device such as a catch basin, grease trap, filter strip, grassed Swale or
sediment trap is provided.
m. Bottom of the device is covered with a layer of clean sand to an average depth of 4 inches or
dense vegetative cover is provided.
n. Vegetated filter is provided for overflow and detail is shown on plans (Required minimum
length is 50 feet for SA waters, 30 feet for other waters).
o. Flow distribution mechanism within the basin is provided.
p. A benchmark is provided to determine the sediment accumulation in the pretreatment device.
q. Runoff in excess of the design volume bypasses off-line systems (bypass detail provided).
r.
S
System is designed to draw down the design storage volume to the proposed bottom
elevation under seasonal high water conditions within five days. A soils report and all.
pertinent draw -down calculations are attached.
Plans ensure that the installed system will meet design specifications (constructed or
restored) upon initial operation once the project is complete and the entire drainage area is
stabilized.
Form SWU-103 Rev 3.99 Page 2 of 3
IV. INFILTRATION BASIN OPERATION AND MAINTENANCE AGREEMENT
. After every runoff producing rainfall event and at least monthly inspect the infiltration system for erosion,
trash accumulation, vegetative cover, and general condition.
2. Repair eroded areas immediately, re -seed as necessary to maintain adequate vegetative cover, mow
vegetated cover to maintain a maximum height of six inches, and remove trash as needed.
3. After every runoff producing rainfall event and at least monthly inspect the bypass, inflow and overflow
structures for blockage and deterioration. Remove any blockage and repair the structure to approved design
specifications.
4. Remove accumulated sediment from the pretreatment systern and infiltration basin annually or when depth
in the pretreatment unit is reduced to 75% of the original design depth. The system shall be restored to the
original design depth without over -excavating. Over -excavating may cause the required water table
separation to be reduced and may compromise the ability of the system to perform as designed. Removed
sediment shall be disposed of in an appropriate manner and shall not be handled in a manner that will
adversely impact water quality (i.e. stockpiling near a stormwater treatment device or stream, etc.).
A benchmark shall be established in the pretreatment unit. The benchmark will document the original
design depth so that accurate sediment accumulation readings can be taken. The measuring device used to
determine the depth at the benchmark shall be such that it will give an accurate depth reading and not
readily penetrate into accumulated sediments.
When the design depth reads 7.5 feet in the pretreatment unit, the sediment shall be
removed from both the pretreatment unit and the infiltration basin.
5. If the Division determines that the system is failing, the system will immediately be repaired to original
design specifications. If the system cannot be repaired to perform its design function, other stormwater
control devices as allowed by NCAC 2H .1000 must be designed, approved and constructed.
I acknowledge and agree by my signature below that I am responsible for the performance of the five
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.
Print Name and Title: Joseph Barwick, President Carteret Community College
Address: 3305 Arendel.l St. , Morehead City, NC 28557
Phone: 222-6140 Date:. 11` q_c)3
Signatu
Note: The legally responsible party should not be a honeowners association runless more than SO% of the lots have been sold and a
resident of the subdivision has been awned the president.
I, 77o kxQ e_ -A�) . 5!m+;ON a Notary Public qf 011� for the State of 00r4N C0l,, County of `,
r+C - , do hereby certify that ZQSCO V-�i�Gf W lC% personally appeared before me this qk
day of J-X)C�3 , and acknowledge the due execution of the forgoing infiltration basin maintenance requirements.
Witness ni • lid and official sell,
SEAL � t
1��
My commission expires 1 f
Forn SWU-103 `Rev 3.99
Page 3 of 3
"'91
A
001A Itomor ILVI
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ri
AAPR OVED
NORTH CAROLINA ENVIRONMENTAL
MANAGEMENT COMMISSION
DIVISION OF WATER QUALITY
2-7 - F7EF8 - -zcx) 4
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151A HIGHWAY 24
HEAD CITY, N.C. 28557
(4-2) 47 7470
NAL L L I YPH 167. —E.