HomeMy WebLinkAboutSW7060712_CURRENT PERMIT_20070409STORMWATER DIVISION CODING SHEET
POST -CONSTRUCTION PERMITS
PERMIT NO.
SW:Za�a42 Z/2
DOC TYPE
CURRENT PERMIT
C❑ APPROVED PLANS
❑ HISTORICAL FILE
❑ COMPLIANCE EVALUATION INSPECTION
DOC DATE
.62a
YYYYMM DD
.'•
Michael F. Easley, Governor
William G. Ross Jr., Secretary
r North Carolina Department of Environment and Natural Resources
I
Y Alan W. Klimek, P.E. Director
Division of Water Quality
DIVISION OF WATER QUALITY
April 9, 2007
County of Dare
Attn: Mr. Terry Wheeler
PO Box 1000
Manteo, NC 27954
Subject: Stormwater Permit No. SW7060712
Hatteras Satellite Office
High Density Stormwater Project
Dare County
Dear Mr. Wheeler:
The Washington Regional Office received a completed
Stormwater Application for the subject project on February 26,
2007. 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. SW7060712 dated April 9, 2007 to Dare
County.
This permit shall be effective from the date of issuance
until April 9, 2017 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.
North Carolina Division of Water Quality Internet: wwo,mcwaternualitv.orm
943 Washington Square Mall Phone (252) 946-6481
Washington, NC 27889 Fax (252) 946-9215
Nne
orthCarohna
Naturallry
An Equal Opporlunity/Affirmative Action Employer— 50 % Recycled110 % Post Consumer Paper
County of Dare
April 9, 2007
Page Two
If you have any questions, or need additional information
concerning this matter, please contact Mr. Bill Moore at (252)948-
3919.
Sincer y,
Al Hodge, Regional Supervisor
Surface Water Protection Section
Washington Regional Office
cc: Mulkey Engineers
Dare County Planning/Inspections
t/4ARO Stormwater Files
Central Files
State Stormwater Management Systems
Permit No. SW7060712
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
County of Dare
Dare County
FOR THE
construction, operation and maintenance ofstormwater management
systems 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 for
(3) infiltration basins to serve the Hatteras Satellite Office
located off NC12 at Frisco, NC.
This permit shall be effective from the date of issuance until
April 9, 2017, 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 on page 9 of this permit,
the Project Data Sheet.
3. Approved plans and specifications for this project are
incorporated by reference and are enforceable parts of the
permit.
3
DIVISION OF WATER QUALITY
PROJECT DATA
Project Name:
Permit Number:
Location:
Applicant:
Mailing Address:
Application Date:
Water Body Receiving Stormwater
Runoff:
Classification of Water Body:
Total Site Area:
Total Impervious
Surfaces Allowed:
Basin Depths:
Required Storage Volume:
Provided Storage Volume:
Provided Surface Area:
Storage Elevations:
VA
Hatteras Satellite Office
SW7060712
Dare County
County of Dare
PO Box 1000
Manteo, NC 27954
07/17/2006; original
02/26/2007; complete
Pamlico Sound
SA
28.9 acres
1.01 acres
0.75
ft -
Basin 1
0.80
ft -
Basin 2
2.25
ft -
Basin 3
1133
cf
- Basin 1
1105
cf
- Basin 2
2181
cf
- Basin 3
4487
cf -
Basin 1
2222
cf
- Basin 2
4530
cf
- Basin 3
4876
sf
- Basin 1
2625
sf
- Basin 2
1313
sf
- Basin 3
5.92
ft
- Basin 1
7.30
ft
- Basin 2
6.75
ft
- Basin 3
4. No homeowner/lot owner/developer shall be allowed to fill in,
alter, or pipe any vegetative practices (such as swales)
shown on the approved plans as part of the stormwater
management system without submitting a revision to the permit
and receiving approval from the Division.
5. The following items will require a modification to the
permit:
a. Any revision to the approved plans, regardless of size
b. Project name change
C. Transfer of ownership
d. Redesign or addition to the approved amount of built -
upon area
e. Further subdivision of the project area.
In addition, the Director may determine that other revisions
to the project should require a modification to the permit.
6. 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.
II. SCHEDULE OF COMPLIANCE
1. The permittee will comply with the following schedule for
construction and maintenance of the stormwater management
system.
a. 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 surfaces except roads.
b. During construction, erosion shall be kept to a minimum
and any eroded areas of the system will be repaired
immediately.
2. The facilities must be properly maintained and operated at
all times. The approved Operation and Maintenance Plan must
be followed in its entirety and maintenance must occur at the
scheduled intervals.
3. The permittee shall at all times provide the operation and
maintenance necessary to assure the permitted stormwater
system functions at optimum efficiency including, but not
limited to:
5
a. Semi-annual scheduled inspections (every 6 months)
b. Sediment removal
C. Mowing and revegetation of side slopes
d. Immediate repair of eroded areas
e. Maintenance of side slopes in accordance with approved
plans and specifications
f.. Debris removal and unclogging of outlet structure,
orifice device and catch basins and piping.
4. 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. .
5. 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.
6. Upon completion of construction 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. Mail the
Certification to the Washington Regional Office, 943
Washington Square Mall, Washington, North Carolina, 27889,
attention Division of Water Quality.
7. A copy of the approved plans and specifications shall be
maintained on file by the Permittee for a minimum of five
years from the date of the completion of construction.
III. GENERAL CONDITIONS
1. 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 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.
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 143-215.6(a) to 143-215.6(c).
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.
6
9. 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 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.
6. At least 6 months prior to the expiration date, the permittee
shall request that this permit be renewed.
Permit issued this the 9 th day of April, 2007.
NORTH CAROLINA ENVIRONMENTAL MANAGEMENT COMMISSION
Alan W. Klimek, P.E., Director
Division of Water Quality
By Authority of the Environmental
Permit Number SW7060712
7
Management Commission
Stormwater Permit SW7060712
(3) Infiltration Basins
Hatteras Satellite Office
Frisco, NC
Designer's Certification
as a duly
registered Professional Engineer in the State of North Carolina,
having been authorized to observe (periodically/weekly/full time)
the construction of the project,
for
(Project)
(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.
Signature
Registration Number
Date
n
Vif
g4-/�(o
llk/o�
®�p►(�_1hI.A (�O State of North Carolina
NV Q V ADPutment of Environment and Natural Resources
Division of Water Quality
sidAc, 7/ao/xp
STORMWATER MANAGEMENT PERMIT APPLICATION FORM
This form may be photocopied for use as an original
I. GENERAL INFORMATION
i. Applicants name (specify the name of the corporation, individual, etc, who owns the project): .
Co UNTV Or PARE
2. Print Owner/Signing Official's name and tide (person legally responsible forfacilityand compliance):
1'...., 9 .... , rrtl �� Coti n { ar
3. Mailing Address for person listed in item 2 above:
City: MA'VTEO State: lJ.C. Zip: Z7454
Telephone Number:
4. Project Name (subdivision, facility, or establishment name - should be consistent with project name on plans,
specifications, letters, operation and maintenance agreements, etc.):
I-4ATTEQA5 SATE" irF OF,CE
5. Location of Project (street address):
563�6 Tic- 14wy IZ
City: Frisco County E)APE
6. Directions to project (from nearest major intersection):
Ae1prcx• Si000 WEST ALo, N.C, Hwy IZ Fropi IN-E iSK'T o
7. Latitude: 35' N Longitude: 7534t 50 of project
8. Contact person who can answer questions about the project:
Name: CNRi57opwc2 F2yrmr Telephone Number. (qlq
II. PERMIT INFORMATION:
1. Specify whether project is (check one): New Renewal Modification
Fomi SWU-101 Version 3.99 Page 1 of
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 ✓ High Density _Redevelop General Permit _Other
4. Additional Project Requirements (check applicable blanks):
_CAMA Major / 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
I. 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 .
KuNn�G Fzom ) mk W5Srgzy RAPT OF TH F_ SItF WILL U'YIL;'; F22 SFKF_U
T F.^,W
(�U 2 SI�P.Q TP /Nfr)LAnc/! r3c,: /, i. I Hr � -. EAs.��Rh/ 7,6g: ,0W '! ILL A,:;c r/Li r
HFF'r 1"LCW �A/r0 z 7'?�15��D' S Wn[s ���� li:0 L1= LcN('� 1-cCWIN4 �N 0PPo5 rTY IiIRECT/oN..
2. Stormwater runoff from this project drains to the PASc^orAmic River basin.
3. Total Project Area: ze.4o acres 4. Project Built Upon Area: 3. d� %
5. How many drainage areas does the project have? :3
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 I
Drainage Area 2
Receiving Stream Name
/
P >1Lrcc so,,•.�o
PnmLico ,; ;
So
Receiving Stream Class
SA e; W
SA 40 W
Drainage Area
(
O. 5 q Ac
Existing Impervious" Area
0.036 Ac
0, o$6 A c
Proposed Impervious Area
o,Zq6 Ac
o,ZN Ac
% Impervious` Area (total)
Impervious` Surface Area
Drainage Area I
Drainage Area 2
On -site Buildings
—
O 7o Ac
On -site Streets
o 133 Ac
0. O 1
On -site Parking
0 35c
0.61 , Z Ac
On -site Sidewalks
0.0Z6 4C
0.010 A
Other on -site
—
_
Off -site
- 0, 0'z 6 AC
Ac
Total: . 256 A c-
Total: 0. *Z0 Ac
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
Basin Information
Drainage Area 3
Receiving Stream Name
Pamlico Sound
Receiving Stream Class
SA; HOW
Drainage area
1.934
Existing Impervious Area
0
Proposed Impervious Area
0.483 AC
% Impervious Area (total)
24.97%
Impervious Surface Area
Drainage Area 3
On -site buildings
0.199 AC
On -site streets
0.101 AC
On -site parking
0.147 AC
On -site sidewalks
0.036 AC
Other on -site
0.000 AC
Off -site
0.000 AC
Total:
0A83 AC
7. How was the off -site impervious area listed above derived? ELL tt F rTFl! `.� vzV-, Ftc v
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 runalf from outparcels or future development shall be directed into the permitted stormwater control
system. These connections to the stormwa ter can trol system shall be performed in a manner that maintains the integrity
and performance of One system as pernitted.
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
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-]02
Wet Detention Basin Supplement
Form SWU-103
Infiltration Basin Supplement
For 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
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.
Please indicate that you have provided the following required information by initialing in the space provided
next to each item.
Initials
• Original and one copy of the Stormwater Management Permit Application Form e"AF
• One copy of the applicable Supplement Fonn(s) for each BMP CAF
• Permit application processing fee of $420 (payable to NCDENR) CAF
• Detailed narrative description of stormwater treatment/management CAF
• Two copies of plans and specifications, including: car
- 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 sweets 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): Mow<e'y FNC�iN�AZS `} C.��,�s.',:rn�✓IS
Mailing Address: G %ri0 'jgyc., SAD
Phone: Nice ) 8:s-8 lSZ3
VIII. APPLICANT'S CERTIFICATION
State: A/ C Zip: Z 7J 11
Fax: ( qfq ) 6',rl-/1/R
I, (print or type name of person listed in General information, item 2) / 4'C-1JLJ�'`z� e✓
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 wit] be recorded, and that the proposed project complies with the requirements of ISA
NCAC 2H .1000.
Date:
Form SWU-101 Version 3.99 Page 4 of 4
Permit No.
(lobe provided by DTVQ)
State of North Carolina
Department of Environment and Natural Resources
Division of Water Quality
s�EG F.b�i7 Lam®
STORMWATER MANAGEMENT PERMIT APPLICATION FORM
INFILTRATION BASIN SUPPLEMENT JUL 17 2006
This form may be photocopied for use as an original DINQ_WAR®
DWO Stormwater Management Plan Review: UVS[
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
Project Name : HATTr-gj, ,< 3ATF/ ' Oi-r-tce
Contact Person: (— uR 1SroPt+cR rLyTiar- Phone Number: (919 ) f35R--/�31 C3
This worksheet applies to: Basin No. 1 in Drainage Area
(rrs identified On plaue) (from Form Srrt1-l0/,)
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 CnArP Oua' rllo= 5Amb5 1 ARay 'F11"b1-u
Infiltration Rate . in/hr or cf/hr/sf (circle appropriate units)
SHWT Elevation 2• o f117S1 (Seasonal High FYatei Table elevalion)
Basin Design Parameters
Design Storni _ 3 inch (1.5 inch event jar SA waters, 1 inch eventfor others)
Design Volume 3. J) 4`_f c.f. %
Drawdown Time days
Basin Dimensions
Basin Size 95 8. x JrZO sq. ft. (bottom dimensions)
Basin Volume Provided 3 4ZG c.f. ?
Basin Elevations
Bottom Elevation 4. h fmsl
Storage Elevation 6 .S fins)
Top Elevation 7 o fmsl
Form SWU-103 Rev 3.99 Page 1 of 3
1II. 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 A 008.
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 Storntwater Management Permit
Application Form, the agent may initial below. Attach justification if a requirement has not been met.
Applicants Initials
eig� a. System is located 50 feet from class SA waters and 30 feet from other surface waters.
c b. System is located at least 100 feet from water supply wells.
4, c. Bottom of system is at least 2 feet above the seasonal high water table.
o, 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.
f. 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.
CIA g. Drainage area for the device is less than 5 acres.
h. Soils have a minimum hydraulic conductivity of 0.52 inches per hour and soils report is
attached.
i
i. 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.
Ga(, 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.
k. All side slopes stabilized with vegetated cover are no steeper than 3:1 (H:V).
I.• A pretreatment device such as a catch basin, grease trap, filter strip, grassed swale or
sediment trap is provided.
in. 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.
eel 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.
6 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. 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.
s. 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. INFD,TRATION BASIN OPERATION AND MAINTENANCE AGREEMENT
l . 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 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 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 stonmwater
control devices as allowed by NCAC 2H .1000 must be designed, approved and constructed.
1 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: %t✓+� W: <^lc i �� 1ntiLN�
Address: 0.0. V, 100D yyxk,,,-VC 0 ,V C 2 -ts S Y
5— 64eu
�1n1a4
/Vote: The legally responsible parry should not be a homemrners association unless more that? 50% of the lots have been sold and a
resident of the subdivision has been named the president.
j1, Cli o1 ee r W ? /% I QM,5 , a Notary Public for the State of 0, , County of
"bnt-e , do hereby certify that Te " W lee.lei- personally appeared before me this�n'
day of \J" /W , •4 ODI, , and acknowled^_e the due execution of the forgoing infiltration basin maintenance requirements.
Witness my hand %ei�,4i' &iila1e,l, t, - � , W C��e/�
SEAL
` 'r•
Form S\�;J-103
co
My commission expires /1-4 -09
Pale 3 of 3
Pemut No
(to be provided by DIV&
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 pho(ocopied for use as an original
RECE0VIED
JUL 1 7 2006
®WQ-WARO
DWO Stormwater Management Plan Review:
A complete stonnwater management plan submittal includes a stonnwater 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 : Na rr-zns SnrE&rn= OFF- cf
Contact Person: CNr-T ['IAE_FZ F-wrr+i� Phone Number: (qIq )FEB -iF,
This worksheet applies to: Basin No
2
(as id wifted on plmts)
in Drainage Area i
(from Form Sirv-101)
I1. 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 (finsl).
a71�r.Fas... (file/owl
Soils Report Summary y` r� / /' s - 3 " be /ww
\RE Y 1=co
Soil Type n r wE HND3,ou6p
Infiltration Rate in/hr or cf/hr/sf (circle appropriate mats)
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
4.b fn1Sl (Seasonal High Water Table elevation)
3 inch (1.5 inch every far Sal waters, I inch event for others)
207 c.f. 7
days
iti ft. x i. = 27t sq. f. (bonom dimensions)
° n c.f.
3 5 finsl
0 find
5 trust
Forni 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 ofEnvironment, 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
16 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.
r,4_ d. Bottom of the system is 3 feet above any bedrock or impervious soil horizon.
k1 e. System is not sited on or in fill material or DWQ approval has been obtained.
f. 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.
Cae- g. Drainage area for the device is less than 5 acres.
It. Soils have a m nimum hydraulic conductivity of 0.52 inches per hour and soils report is
attached.
i. System captures and infiltrates the runoff from the first 1.0 mch of rainfall (1.5 inch event for
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.
k. All side slopes stabilized with vegetated cover are no steeper than 3:1 (H:V).
u,LY 1. A pretreatment device such as a catch basin, grease trap, filter strip, grassed swale or
sediment trap is provided.
in. 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.
c4 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.
C6 p. A benchmark is provided to detemtine the sediment accumulation in the pretreatment device.
q. Runoff in excess of the design volume bypasses off-line systems (bypass detail provided).
F. 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.
cL s. 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.
Fonn SWU-103 Rev 3.99 Page 2 of 3
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 inunediately, 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 die 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 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 stonmwater
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: ev✓
ec PN clo— h YA r"-t"
Address:
o , 30 x [ Utril
Phone: 15t 475— $
Date: �1l 06
Signature
Note: The legally responsible parry should not be a homeowners association unless more then 50% of the lots hm,e been sold and a
resident of the subdivision has been named the president. ,
W r DiUP.rx"o
, a Notary Public for the State of ��s , County of
do hereby certify that
T vn . %v%IG'?_�Pi— personally appeared before me this
day of \,II ti{a DO , and acknowledge the due execution of the forgoing infiltration basin maintenance requirements.
Witness my hand d ado` VC34444[1,��,i
CE�9 �..
•,.•UGC
SEAL
^^ p
Mycommissionexpires
a OTAn c� .
x�a �7 y.
Form SWU-Ity3 Rev 31_,_� J w y�tJJ
Page 3 of 3
y�' C' ®, •+•
"ceeeeeaa'+°•
zoos - M U L K E Y
JUL ENGINEERS & CONSULTANTS
®WQ-1NARQ
Infiltration Basins Supplement
c. (Basin #2) From the geotechnical report, groundwater was encountered at elevation
4.5 nearest to Basin #2, aith the existing grade in this area of 5.0. Due to this fact,
we increased the surface area and kept the basin as shallow as possible, with a depth
of only 1.5'.
f. No drainage easements have been recorded. The proposed on -site drainage will be
private.
h. The hydraulic conductivity is unknown at this time.
1. Filter strips were used to the greatest extent possible. However, the use of catch
basins would create problems in trying to detain any stormwater runoff. The inverts
of the pipes would be lower that what is necessary to outlet.
o. Basin #1 utilizes a 6:1 length to width ratio in order to promote settling of any
suspended solids. Basin #2 has a large surface area relative to the incom ng
flow/velocity, also to encourage settling.
q. No bypass structure has been provided. Again, this would mean that the stormwater
must be captured in some type of stormwater piping network. This would drive the
basins even deeper, which would create potential problems with the existing
groundwater. Also, it would pose problems regarding oudetting the proposed
basins.
r. The attached current soils report does not include an infiltration rate. Therefore,
draw -down calculations have not been provided.
MULKEY INC. 6750 TRYON ROAD CARY. NO 27511 PO DO% 33127 RALEIGH. NO 27636 PH: 919-051-1912 FAX: 919-851-191a WWW.MULKEYINC.COM
T
�MULKEY
ENGINE . EMS & CONSULTANTS:.-
MMLKEY. INC.
PO Box 33127,
RALE113.. NC 27636-3127
919.135 , -1912
PAY
Four Hundred Twenty. and 00/100 Dollars
TO.';
NCDENR
1601 Mail Service Center
Raleigh NC 27699
iWACHOVIA BANK, N:Af-- Z..
66-21-530
I'm 0 0 0 C300 3113,10 1:0 S 3000 2 191: 20E. 25 30 7 1123 113 20
CHECK DATE' July,.7., 2006.
AMOUNT $420.00
e
�0--MULKEY
ENGINEERS & CONSULTANTS
P❑ Box 33127
RALEIGH, NC 27636
PHONE: 91 9-851 -1 91 2
FAx: 9 1 9-B 5 1- 1 9 1 B
LETTER OF TRANSMITTAL
RE>✓FIVEU
JUL 17 2006
To: Roger Thorpe Date: July 14, 2006
NCDENR
934 Washington Square Mall
Washington, NC 27889 " FEDERAL EXPRESS "
Re: Hatteras Satellite Office
Job No.: 2005354.00
I am sending you the following item(s):
COPIES
DATE
NO.
DESCRIPTION
2
Construction Drawing Set
2
Permit Application
2
Infiltration Basin Supplement
2
Infiltration Basin Supplement explanations
1
Calculations Package
1
7/7/06
60038
$420 check
These are transmitted as checked below:
❑ As requested ❑ For your use
❑ For approval ❑ For Signatures
® For review and comment ❑
Remarks:
Enclosed are the plans and Calculations for Hatteras Satellite Office. If you have any questions, feel free
to call me at 919.858.1823.
Copy to: Signed: `-� 447ti—
Christopher A. Flythe, El
SWid 0'"71�
FINANCIAL RESPONSIBILITYIOWNERSHIP FORM
SEDIMENTATION POLLUTION CONTROL ACT
LQ
No person may initiate any land -disturbing activity on one or more acres as covered by the Act before this
form and an acceptable erosion and sedimentation control plan have been completed and approved by the
Land Quality Section, N.C. Department of. Environment and Natural Resources. (Please type or print and, if
the question is not applicable or the e-mail and/or fax information unavailable, place NIA in the blank.)—
Part A.
JUL 2 5 2006
1. Project Name Hatteras Satellite Office
2. Location of land -disturbing activity: County Dare City or Township Frisco V u u Q-WAR®
Highway/Street 50346 NC Hwv 12 Latitude Longitude
3. Approximate date land -disturbing activity will commence: 8/06
4. Purpose of development (residential, commercial, industrial,. institutional, etc.): commercial
5. Total acreage disturbed or uncovered (including off -site borrow and waste areas): 2.10 AC
6. Amount of fee enclosed: $ 150.00 . The application fee of $50.00 per acre (rounded
up to the next acre) is assessed without a ceiling amount (Example: a 9-acre application fee is $450).
7. Has an erosion and sediment control plan been filed? Yes No Enclosed X
8. Person to contact should erosion and sediment control issues arise during land -disturbing activity:
Name David Clawson E-mail Address dayecCa7C0 dare nc us
Telephone 252.475.5731 Cell #
Fax # 252.473.5668
9. Landowner(s) of Record (attach accompanied page to list additional owners):
County of Dare (David Clawson) 252.475.5731 252.473.5668
Name Telephone Fax Number
207 Budleich Street
Current Mailing Address Current Street Address
Manteo NC 27954
City State Zip City State ZIP
10. Deed Book
Part B.
Page No. Provide a copy of the most current deed.
1. Person(s) or firm(s) who are financially responsible for the land -disturbing activity (Provide a
comprehensive list of all responsible parties on an attached sheet):
Same as Landowner of Record
Name E-mail Address
Current Mailing Address
City
State cip
Current Street Address
City State Zip
Telephone Fax Number
2. (a) If the Financially Responsible Party is not a resident of North Carolina, give name and street address
of the designated North Carolina Agent:
Name
Current Mailing Address
City
Telephone
State
E-mail Address
Current Street Address
City State Zip
Fax Number
(b) If the Financially Responsible Party is a Partnership or other person engaging in business under an
assumed name, attach a copy of the Certificate of Assumed Name. If the Financially Responsible
Party is a Corporation, give name and street address of the Registered Agent:
Name of Registered Agent
Current Mailing Address
E-mail Address
Current Street Address
City State Zip City State Zip
Telephone Fax
The above information is true and correct to the best of my knowledge and belief and was provided
by me under oath (This form must be signed by the Financially Responsible Person if an individual
or his attorney -in -fact, or if not an individual, by an officer, director, partner, or registered agent with
the authority to execute instruments for the Financially Responsible Person). I agree to provide
corrected information should there by any change in the information provided herein.
U \1 r , `Ii
Type or prin ame
Signature
C ou .ice rM e~
Title or Authority
Date
It1 Jb
I, Janice" a Notary Publicof the County of bcre
State of North Carolina, hereby certify that % i Me, /e4— appeared
personally before me this day and being duly s orn acknowledged that the above form was
executed by him.
Witness my hand and not , valr Phis �r day of 20 0�
Otq�A
0�fir,a� N�« ttbry
Seal
My commission expires
u�L5v
CO
`0rerrerarrN°
Permit No.
(to be provided by DWQ)
State of North Carolina
Department of Environment and Natural Resources
Division of Water Quality
STORMWATER MANAGEMENT PERMIT APPLICATION FORM
RLch.- LW
INFILTRATION BASIN SUPPLEMENT
This form may be photocopied for use as an original FEB 2 6 2007
DWO Stormwater Management Plan Review: ®WQ-WAR®
A complete stonnwater management plan submittal includes a stonnwater management permit application, an
infiltration basin supplement for each system, design calculations, soils report and plans and specifications
showing all stonnwater conveyances and system details.
I. PROJECT INFORMATION
Project Name : ITA IEZAS SaT1=�-L,T[= 0T-F1cf
Contact Person: CHtiison E FiLr-Hi= PhoneNmnber: (9iy ) 858-1823
This worksheet applies to: Basin No. Z in Drainage Area Z
(as identified on plans) (from Form 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 (f nsl).
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
Sr �S�tin
0.7S m/hr or cf/hr/sf (circle appropriate units)
5.l9 fmS1 (Seasonal High Water Table elevation)
11 S inch (1.5 inch event for SA waters, I inch event for others)
IIoS c.f.
3 days
ft. x 105 ft. = ZG 'Zi sq. ft. (bottom dimensions)
Z, ZZZ= c.f.
finsl
fmsl
fmsl
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
c�_ a. System is located 50 feet from class SA waters and 30 feet from other surface waters.
L� b. System is located at least 100 feet from water supply wells.
SE: Araci4 c. Bottom of system is at least 2 feet above the seasonal high water table.
e-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.
See A m Nsn f. 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.
t f g. Drainage area for the device is less than 5 acres.
c-r h. Soils have a minimum hydraulic conductivity of 0.52 inches per hour and soils report is
attached.
i. 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.
f� 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.
k. All side slopes stabilized with vegetated cover are no steeper than 3:1 (H:V).
1. A pretreatment device such as a catch basin, grease trap, filter strip, grassed swale or
sediment trap is provided.
in. 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.
SEE Arr Hen q. Runoff in excess of the design volume bypasses off-line systems (bypass detail provided).
r. 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.
s. 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 MAINTENACNCE 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 nmanner and shall not be handled in a manner that will
adversely impact water quality (i.e. stockpiling near a stonnwater 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 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 stonnwater
control devices as allowed by NCAC 2H A000 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 parry.
Print Name and Title: -�%— u k ea- eN Co—
naa—,- -�. — Co ,rt�%� P_ o . m3ex i ou). Mkwice, "J t 7—
y
!Vote: The legally responsible parry should not be a hmnemcners association unless more than 50% of the lots have been sold and a
l rc.rident of the subdivision has been named the pi esident.
I, �l nntrPa W t Q.Q(LlAwJ , a Notary Public for the State of /ref , County of
do hereby certify that J9vn i w!Ie'�IEi— _._ personally appeared before me this
day of 00(, , and acknowledge the due execution of the forgoing infiltration basin maintenance requirements.
Witness my hand and,,=QFia4ml,If �n A 'ro �. w CLC11 640
SEAL �� 59,.f_', My commission expires
®TAR 7�'s
yea `10
Fame SWU ®Ijl3 Rev . 91B 1. �`) Page 3 of 3
++++ CU
+ceee.asae
0-MULKEY
ENGINEERS $ CEINSULTANTS
Infiltration Basins Supplement
Infiltration Basin #2
c. The bottom of the system is -1.31' above the seasonal high water table. Per
comments, a minimum of 1'-2' is required above seasonal high water table in order
for approval.
f. Since Dare County owns the land, and is responsible for maintenance, no easements
are required.
q. As discussed, no bypass structure is provided. However, instead of the 1.5" rainfall
volume, double that amount will be infiltrated in Basin #2.
MULKEY INC. 6750 TRYON ROAD CARY. NO 27511 PC BO% 33127 RALEIGM, NO 27636 PH: 919-853-1912 FP%: 919-EI51-19113 WWW.MLILKEYINC.CGM
Permit No.
(to be provided by DWQ)
State of North Carolina
Department of Environment and Natural Resources
Division of Water Quality
STORMWATER MANAGEMENT PERMIT APPLICATION FORM MEoVED
INFILTRATION BASIN SUPPLEMENT FEB 2 6 2007
This form may be photocopied for use as an original
DWQ Stormwater Management Plan Review: DWQ-F AR®
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: ; {q„EtiFls rrs O Ftce
Contact Person: C r,,: i s—cpliE c f-�yrtl E Phone Number: (q iR -1 u Z 3
This worksheet applies to: Basin No. 3 in Drainage Area 3
(as identified on plans) (from Form 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
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
O, 7S in/ or cf/hr/Sf ,(circle appropriate units)
3 16 fmsl (Seasonal High Water Table elevation)
1 S inch (1.5 inch event for SA waters, I inch event for others)
Z, I81 c.f.
I.5 days
i ft. x g , 7 S ft. = 1, 313
4,530 c.f.
4.5 fmsl
6,75- fmsl
7, o finsl
ft. (bottom dimensions)
Form SWU-103 Rev 3.99 Page 1 of 3
HL 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.
e,� b. System is located at least 100 feet from water supply wells.
SA 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.
S
C. System is not sited on or in fill material or DWQ approval has been obtained.
f. 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.
664- g. Drainage area for the device is less than 5 acres.
h. Soils have a minimum hydraulic conductivity of 0.52 inches per hour and soils report is
attached.
i. System captures and infiltrates the runoff from the first 1.0 inch of rainfall (I.5 inch event for
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.
k. All side slopes stabilized with vegetated cover are no steeper than, 3:1 (H:V).
1. A pretreatment device such as a catch basin, grease trap, filter strip, grassed swale or
sediment trap is provided.
in. 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.
c-,4 �,N q. Runoff in excess of the design volume bypasses off-line systems (bypass detail provided).
r. 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.
s. 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.
5;A = 5£c AT Ac E�
Form SWU-103 Rev 3.99 Page 2 of 3
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
sedunent 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 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 stonnwater
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: 1 4 CN C-0 ^ ^ �Y\ c"
Address: ol/ Ca -n o.
Phone: C� St� 97f— $ Date:_ 7106L
Note: The legally responsible parry should not be a homeowners association unless more than 50% of the lots hm,e been sold and a
l resident of the subdirrsion has been named the president.
I, 0 mtC2 W t hfi,. XA , a Notary Public for the State of Nei , County of
do hereby certify that T .m WhP-PiCI— personally appeared before me this
day of Q00t, , and acknowledge the due execution of the forgoingp itn�filtration basin maintenance requirements.
10
Witness my hand and a,j6j169�`ilito n ,� LJ i�C. um� ^O
SEAL ,�i ���� My commission expires
a OT A&�
v 6t1p e .
Form SWU +1"g3 Rev 3.59r'3 p—\�� Page 3 of 3
°Ff+cceaeaaao°�
MULKEY
ENGINEERS & CC7N5UL.TANTS
Infiltration Basins Supplement
Infiltration Basin #3
c. The bottom of the Basin is —1.14' above the seasonal high water table. As discussed
in the comments, permitting is possible with a mimmuin of 12-24" of clearance
between the bottom of the basin, and the seasonal high water table.
f. Since Dare County owns the land, and is responsible for maintenance, no easements
are required.
q. As discussed, no bypass structure is provided. However, instead of the 1.5" rainfall
volume, greater than 2 times that amount will be infiltrated in Basin #3.
MOLKEY INC. 6750 TRYON ROAD CARY. NC 27511 PC Box 33129 RALEIDr, NC 27636 PH: 919-851-1912 FA,: 919-851-1918 www.NULKEvwc.cDN
Permit No.
(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 RECEM EVE
This form may be photocopied for use as an original FEB 2 S 2007
DWO Stonmwater Management Plan Review: (� IA�<l
A complete stormwater management plan submittal includes a stormwater manager er permi p[�lication, 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 : < nracE
Contact Person: C Hgts7aPl+En' Inc Phone Number: ('rill'
This worksheet applies to: Basin No
.1
(as identified on plans)
in Drainage Area
1
(from Form 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 infonnation. All elevations shall be in feet mean sea level (fmsl).
Soils Report Summary
Soil Type 2Y -�'w>
Infiltration Rate in/ or cf/hr/sf (circle appropriate units)
SHWT Elevation 2). 1 % flnsl (Seasonal High Water Table 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
I ' 7 inch (1.5 inch event for SA waters, I inch event for others)
1, 133 c.f.
days
q,Z ft. x 5 3 ft. _ 4,876 sq. ft. (bottom dimensions)
S7 c.f.
S,17
finsl
5.9Z
finsl
6.)7
finsl
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.
e 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.
'-A f. 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.
4 g. Drainage area for the device is less than 5 acres.
w� h. Soils have a minimum hydraulic conductivity of 0.52 inches per hour and soils report is
attached.
cf i. 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.
e, 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.
k. All side slopes stabilized with vegetated cover are no steeper than 3:1 (H:V).
c=,21. A pretreatment device such as a catch basin, grease trap, filter strip, grassed swale or
sediment trap is provided.
in. 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.
Cc D. 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).
c o. Flow distribution mechanism within the basin is provided.
p. A benchmark is provided to determine the sediment accumulation in the pretreatment device.
1 q. Runoff in excess of the design volume bypasses off-line systems (bypass detail provided).
/', 2 r. 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.
c s. 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.
S1 _ SEE AnAcrlE>
Form SWU-103 Rev 3.99 Page 2 of 3
IV. INFILTRATION BASIN OPERATION AND MAINTENANCE AGREEIMENT
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 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 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 stonnwater
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 performnance 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: c,-!b lJA—lc� yl1cis.w�v
Address: P.O. V,, 10oD YV% ka SY
phnner ( Z 5 L) (V? 5- S Iq p u _ Date: 1 n l a C.
Note: The legabi, responsible pm pr should not be a homeowners association unless more than Al$o of the lots have been sold and a
jj resident of the subdivision has been named the president.
11 I. 011I CC j—, . 0 i /I 16 M,5 , a -\Notary Public for the State of 1�f Q� County of
do hereby certify that Lpe2, �Elr personally appeared before me this
day of �, .2W , and acknowledge the due execution of the forgoing infiltration basin maintenance requirements.
Witness my hand `6 (4'ktF``if�i9"t
SEAL Y!z. My commission expires��
y.
Font S1k�1-103 R wo.� Page 3 of 3
G
C\ S4
l i
-0-MULKEY
ENGINEERS & CONSULTANTS
Infiltration Basins Supplement
Infiltration Basin #1
f. Since Dare County owns the land, and is responsible for maintenance, no easements
are required.
y. As discussed, no bypass structure is provided. However, instead of the 1.5" rainfall
volume, nearly quadruple that amount will be infiltrated in Basin #1.
MULKEY INC. 5750 TRYON ROAD C.ARY. NC 27511 PC Box 33129 RALEIGH. NC 27636 PH: 91 9-851-191 2 FAX: 919-851-1916 www.MULKEYINC.CMM
OFFICE USE ONLY
Date Received
Fee Paid
Permit Number
2-7,- D
0 6 p 7/Z.-
State of North Carolina \
Department of Environment and Natural Resources
Division of Water Quality
STORMWATER MANAGEMENT PERMIT APPLICATION FORM �b�—a-N%
This form may be photocopied for use as an original
I. GENERAL INFORMATION
FEB 2 6 2007
1. Applicants name (specify the name of the corporation, individual, etc. who owns the prcject))WQ"WAR0
2. Print Owner/Signing Official's name and title (person legally responsible for facility and compliance):
(cRtiy iJHF=LSiZ , t7v^ry nC7yr2
3. Mailing Address for person listed in item 2 above:
'ziI � S,fiecT
City: MAIT—Ed State: NC. Zip: 27954
Telephone Number: ('Z5Z )-475'Sg00
4. Project Name (subdivision, facility, or establishment name -should be consistent with project name on plans,
specifications, letters, operation and maintenance agreements, etc.):
)�A �ti�NS �Y�7 rGC i'rf �Fi= tCc
5. Location of Project (street address):
5 G 34 & A/C P WY
City: i7e i S co County:
6. Directions to project (from nearest major intersection):
L'�- AC. C, lye //'vy /Z riZar7 Siy.�,cSrc nnn,
7. Latitude: >50 i5i ',6" n/ Longitude: 76' 34' t✓ of project
8. Contact person who can answer questions about the project:
Name: C 5 it/' E/ yTy _ Telephone Number: ( q I 1 )
II. PERMIT INFORMATION:
1. Specify whether project is (check one): New Renewal 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 and its issue date (if known)
3. Specify the type of project (check one):
Low Density ✓ High Density Redevelop General Permit Other
4. Additional Project Requirements (check applicable blanks):
CAMA Major ✓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.
SNCi;' (- v,•/ IS VIIL,Z6:� T ] Hv
2. Stormwater runoff from this project drains to the PASQL)orANK River basin.
3. Total Project Area: A .3 acres 4. Project Built Upon Area: 24. 1 %
our OF zs.9b is AL /{-c.z6j
5. How many drainage areas does the project have? g
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 L r '
Drainage Area 2: -.
Receiving Stream Name
I"AMLI(O SevN'J
�M ILO
Receiving Stream Class
5A 14 0 t,,
SA 9 6,
Drainage Area
O, Ac
O,
Existing Impervious` Area
Q5
Proposed Impervious'Area
0 eog
0,Z03
% Impervious" Area (total)
'L 4- i = 4 , 4 0
4 S 3
ImperviousSurface Area,
Drainage Area I
Drainage Area 2 .
On -site Buildings
D oZo Ac
—
On -site Streets
o . .0
0,077
On -site Parking
0 , O31
p.lo5'
On -site Sidewalks
0, 017
D •o LI
Other on -site
—
—
Off -site
Total: �,Z g
Total: 0 -Lo3
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
Basin Information
Drainage Area 3
Drainage Area 4
Receiving Stream Name
Pamlico Sound
Pamlico Sound
Receiving Stream Class
SA; HOW
SA; HQW
Drainage area
0.604 AC
0.093 AC
Existing Impervious Area
0.000 AC
0.019 AC
Proposed Impervious Area
0.401 AC
0.024
% Impervious Area (total)
66.39%
46.02%
Impervious Surface Area
Drainage Area 3
Drainage Area 4
On -site buildings
0.140 AC
0.000 AC
On -site streets
0.075 AC
0.023 AC
On -site parking
0.151 AC
0.001 AC
On -site sidewalks
0.035 AC
0.000 AC
Other on -site
0.000 AC
0.000 AC
Off -site
0.000 AC
0.019 AC
Total:
0.401 AC
0.043 AC
Basin Information
Drainage Area 5
Drainage Area 6
Receiving Stream Name
Pamlico Sound
Pamlico Sound
Receiving Stream Class
SA; HQW
SA; HQW
Drainage area
0.245 AC
0.437 AC
Existing Impervious Area
0.000 AC
0.071 AC
Proposed Impervious Area
0.021 AC
0.063 AC
% Impervious Area (total)
8.57%
30.66%
Impervious Surface Area
Drainage Area 5
Drainage Area 6
On -site buildings
0.000 AC
0.000 AC
On -site streets
0.013 AC
0.052 AC
On -site parking
0.008 AC
0.009 AC
On -site sidewalks
0.000 AC
0.002 AC
Other on -site
0.000 AC
0.000 AC
Off -site
0.000 AC
0.071 AC
Total:
0.021 AC
0.134 AC
Basin Information
Drainage Area 7
Drainage Area 8
Receiving Stream Name
Pamlico Sound
Pamlico Sound
Receiving Stream Class
SA; HQW
SA; HQW
Drainage area
1.300 AC
1.107 AC
Existing Impervious Area
0.000 AC
0.000 AC
Proposed Impervious Area
0.000 AC
0.000 AC
% Impervious Area (total)
0.00%
0.00%
Impervious Surface Area
Drainage Area 7
Drainage Area 8
On -site buildings
0.000 AC
0.000 AC
On -site streets
0.000 AC
0.000 AC
On -site parking
0.000 AC
0.000 AC
On -site sidewalks
0.000 AC
0.000 AC
Other on -site
0.000 AC
0.000 AC
Off -site
0.000 AC
0.000 AC
Total:
0.000 AC
0.000 AC
7. How was the off -site impervious area listed above derived? R/L7 % rA� S v�v- v ;'/
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 lot.
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
nextto each item.
Initials
Original and one copy of the Stormwater Management Permit Application Form _( AF
One copy of the applicable Supplement Form(s) for each BMP CAF
Permit application processing fee of $420 (payable to NCDENR) CAF
Detailed narrative description of Stormwater treatment/management CAF
Two copies of plans and specifications, including: CAF
- 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 finn):�,VL -)' EALC7 vrr=PS `� �NSr'�rn�✓TS
Mailing Address: 6-7'0 'TKy,>N tioAD
Phone: (gig ) 87S'IE7-3
VIII. APPLICANT'S CERTIFICATION
State: A/ C Zip: Z75) 1
Fax: ( Q19 ) '6�S:)-MfA
1, (print or type narne of person listed in General Information, item 2) 1-Ore-1 k/J \,« `ew
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 21-1 .1000.
Date: r /- // -0b
Fonn SWU-101 Version 3.99 Page 4 of 4