SW8060243_CURRENT PERMIT_20060421

STORMWATER DIVISION CODING SHEET
POST -CONSTRUCTION PERMITS
PERMIT NO.
SW
DOC TYPE
CURRENT PERMIT
APPROVED PLANS
❑ HISTORICAL FILE
❑ COMPLIANCE EVALUATION INSPECTION
DOC DATE
YYYYMMDD

�pF W A
�O G
L=� 7
• a �
April 21, 2006
Michael F. Easley, Governor
William G. Ross Jr., Secretary
North Carolina Department of Environment and Natural Resources
Indian Beach, LLC
Greystone Real Estate Holdings Corp., Managing Member
Thomas Ryan, Vice President
8414 Falls of the Neuse Road
Raleigh, NC 27615
Subject: Permit No. SW8 060243
The Grande Villas @ The Preserve
Redevelopment Stormwater Permit
Carteret County
Dear Mr. Ryan:
Alan W. Klimek, P.E. Director
Division of Water Quality
The Wilmington Re tonal Office received a complete Stormwater Management Permit
Application Tor The Grande Villas The Preserve on April 10, 2006. Staff review of the plans
and specifications has determined1hat the pproject, as proposed, will comply with the
Stormwater Regulations set forth in Title 15A NCAC 2H .1000. We are forwarding Permit No.
SW8 060243, dated April 21, 2006, for the construction of the subject project.
This permit shall be effective from the date of issuance until April 21, 2016 and shall be subject
to the conditions and limitations as specified therein.
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 either Paul Bartlett or me at [phone].
Sincerely,
Edward Beck
Regional Supervisor
Surface Water Protection Section
ENB/ptb: S:IWQSISTORMWATERIPERMIT1060243.apr06
cc: Ronald D. Cullipher, P.E., Stroud Engineering, PA
Katrina Marshall, Carteret County Inspections
Paul T. Bartlett, P.E.
Division of Coastal Management
Wilmington Regional Office
Central Files
One
NocthCarolina
Aatura!!1l
North Carolina Division of Water Quality 127 Cardinal Drive Extension Wilmington, NC 28405 Phone [phone] Customer Service
Wilmington Regional Office Internet: www.ncwaterguality, org Fax [phone]
An Equal Opportunity/Affirmative Action Employer— 50% Recycled110% Post Consumer Paper

State Stormwater Management Systems
Stormwater Permit Number SW8 060243
STATE OF NORTH CAROLINA
DEPARTMENT OF ENVIRONMENT AND NATURAL RESOURCES
DIVISION OF WATER QUALITY
STATE STORMWATER MANAGEMENT PERMIT
REDEVELOPMENT PERMIT
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
Greystone Real Estate Holdings Corp., Thomas Ryan; Indian Beach Acquisition, LLC
The Grande Villas @ The Preserve
Carteret County
FOR THE
redevelopment of existing impervious surfaces and treatment of the runoff in two
underground infiltration trench 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.
The Permit shall be effective from the date of issuance until April 21, 2016 and shall be
subject to the following specific conditions and limitations:
I. DESIGN STANDARDS
1. The pproposed built -upon area is 80,311 square feet, which is less than the
85,976 square feet that previously existed.
2. To the extent practicable, the project has Provided stormwater control measures
in accordance with the stormwater rules. Those control measures are:
a. Two underground infiltration trench systems;
b. Those measures as more fully described in Section 1.5 of this permit.
3. Approved plans and specifications for projects covered by this permit are
incorporated by reference and are enforceable parts of the permit.
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.
2 of 6

State Stormwater Management Systems
Stormwater Permit Number SW8 060243
5. The following design criteria have been provided in the infiltration trenches and
must be maintained at design conditions:
Infiltration Trench
System #1
System #2
a. Drainage Area, acres
1.89
1.06
Onsite, ft
82,313
46,351
Offsite, ft
None
None
b. Total Impervious Surfaces, ft
56,217
24,094
c. Design Storm, inches
1.5
1.5
d. Trench Dimensions", L x W x H, ft
770 x 7.5 x 2.5
360 x 7.5 x 2.5
e. Perforated Pipe Diameter/Length
2.5'0/770'L
2.5'0/360'L
f. Bottom Elevation, FMSL
11.4
7.0
9. Bypass Weir Elevation, FMSL
13.9
9.5
h. Permitted Storage Volume, ft
6822
3189
i. Type of Soil
Newhan
Fripp & Newhan
Expected Infiltration Rate, inlhr
12.0
12.0
k. Seasonal High Water Table, FMSL
9.0
5.0
I. Time to Draw Down, hours
1.2
1.0
m. Receiving Stream/River Basin
Bo ue SoundfWhite Oak
n. Stream Index Number
20-36- 8.5
o. Classification of Water Body
SA; HQW
" Based on one run of pipe.
II. SCHEDULE OF COMPLIANCE
The permittee shall at all times provide adequate erosion control measures in
conformance with the approved Erosion Control Plan.
2. The permittee shall submit all information requested by the Director or his
representative within the time frame specified in the written Information request.
3. The permittee shall construct the stormwater control measures as shown on the
approved plans.
4. 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:
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. Debris removal and unclogging of outlet structure, orifice device, catch
basins and piping.
5. 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 the approved plans, regardless of size.
b. Project name changge.
C. Transfer of ownership.
d. Redesign or addition to the approved amount of built -upon area.
e.. Further subdivision, acquisition, or selling of the project area. The project
area is defined as all property owned by1he permittee, for which
Sedimentation and Erosion Control Plan approval was sought.
6. The Director may determine that other revisions to the project should require a
modification to the permit.
3 of 6

State Stormwater Management Systems
Stormwater Permit Number SW8 060243
7. The Director may notify the permittee when the permitted site does not meet one
or more of the minimum requirements ofthe permit. Within the time frame
specified in the notice, the permittee shall submit a written time schedule to the
Director for modifying the site to meet minimum requirements. The permittee
shall provide copies of revised plans and certification in writing to the Director
that the changes have been made.
III. GENERAL CONDITIONS
Failure to abide by the conditions and limitations contained in this permit mayy
subject the Permittee to an enforcement action by the Division of Water Qualityy,
in accordance with North Carolina General Statutes 143-215.6A to 143-215.6C.
2. The permit issued shall continue in force and effect until revoked or terminated.
3. 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.
4. The issuance of this permit does not prohibit the Director from reopening and
modifying the permit, revoking and reissuing the permit, or terminating tN permit
as allowed by the laws, rules, and regulations contained in Title 15A of the North
Carolina Administrative Code, Subchapter 2H.1000; and North Carolina General
Statute 143-215.1 et. al.
5. The permittee shall submit to the Director and shall have received approval for
revised plans, specifications, and calculations prior to construction, for an
additions, deletions or redesign of the previously permitted amount of builNpon
area proposed regardless of the size of the modification.
6. The permit is not transferable except after notice to and approval by the Director.
The Director may require modification or revocation and reissuance of the permit
to change the name and incorporate such other requirements as may be
necessary. A formal permit request must be submitted to the Division of Water
Quality accompanied by the appropriate fee, documentation from both 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 Director approves the transfer request.
7. 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.
8. The permittee grants permission to DENR Staff to enter the premises during
normal business hours far purposes of inspecting the facility.
9. The permittee shall notify the Division of any name, ownership or mailing address
changes within 30 days.
10. 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.
Permit issued this the 21 st day of April 2006
NO CAROL A�JViRONMENTAL MANAGEMENT COMMISSION
_-------- ------------------
for Alan W. Klimek, P.E., Director
Division of Water Quality
By Authority of the Environmental Management Commission
Permit Number SW8 060243
4of6

State Stormwater Management Systems
Stormwater Permit Number SW8 060243
The Grande Villas @ The Preserve
Stormwater Permit No. SW8 060243
Carteret Countv
Designer's Certification
Page 1 of 2
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
5 of 6

State Stormwater Management Systems
Stormwater Permit Number SW8 060243
Page 2 of 2
Certification Requirements:
1. The drainage area to the system contains approximately the permitted
acreage.
2. The drainage area to the system contains no more than the permitted
amount of built -upon area.
3. All the built -upon area associated with the project is graded such that the
runoff drains to the system.
4. All roof drains are located such that the runoff is directed into the system.
5. The bypass structure elevations are per the approved plan.
6. The bypass structure is located per the approved plans.
7. A Trash Rack is provided on the outlet/bypass structure.
8. All slopes are grassed with permanent vegetation.
9. Vegetated slopes are no steeper than 3:1.
10. The inlets are located per the approved plans and do not cause short-
circuiting of the system.
11. The permitted amounts of surface area and/or volume have been
provided.
12. All required design depths are provided.
13. All required parts of the system are provided.
14. The required system dimensions are provided per the approved plans.
cc: NCDENR-DWQ Regional Office
Katrina Marshall, Carteret County Building Inspections
6 of 6

OFFICE USE ONLY
Date Received
Fee Paid
Permit Number
9.z aaaGDdz�
1i
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):
Indian Beach Acquistion, LLC
2. P9t O�w,rner/Sito� �ng.Offici
Thom Ryan 1, -Member
d t' e person le ay respons e for facility and c
3. Mailing Address for person listed in item 2 above:
8414 Falls of the Neuse Rd.
City: Raleigh
Telephone Number. 919 844-9025
State: NC
Zip: 27615
4. Project Name (subdivision, facility, or establishment name - should be consistent with project name on plans,
specifications, letters, operation and maintenance agreements, etc.):
The Grande Villas @ The Preserve
5. Location of Project (street address):
Hwy 58
City: Indian Beach County: CARTERET
6. Directions to project (from nearest major intersection):
From the intersection of Hwy 24 & Hwy 58, take Hwy 58 East approx. 11.7 miles. Proiect is on the right
located at the existing Sea Breeze Campground.
7. Latitude: N34141'9"
Longitude: W76A53'28"
8. Contact person who can answer questions about the project:
Name: RONALD D. CULLIPHER, P.E. Telephone Number: ( 252
H. PERMIT INFORMATION:
1. Specify whether project is (check one): ✓ New
of project
247-7479
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)
�fj� pi�1
3. Specify the type of project (check one) :� i
Low Density ✓ High Density ReYlevelop 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.
ALL STORMWATER FROM THE IMPERVIOUS SURFACES SHALL BE TREATED BY UNDERGROUND
INFILTRATION.
2. Stormwater runoff from this project drains to the B,_�D'I Da River basin.
3. Total Project Area: 6.02 acres 4. Project Built Upon Area: 55.12 %
5. How many drainage areas does the project have?,
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
BOGUE SOUND
Receiving Stream Class
SA
SA
Drainage Area
82,313 SF
46,351 SF
Existing Impervious* Area
33,327 SF
11,456 SF
Proposed Impervious*Area
56,217 SF
24,094 SF
% Impervious* Area (total)
68.30 %
51.98 %
Impervious* Surface Area
Drainage Area 1
Drainage Area 2
On -site Buildings
21,173 SF
8,797 SF.
On -site Streets
22,007 SF
12,592 SF
On -site Parking
On -site Sidewalks
13,037 SF
2,705 SF
Other on -site
0 SF
0 SF
Off -site
0 SF
0 SF
Total: 56,217 SF
Total: 24,094 SF
* 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

7. How was the off -site impervious area listed above derived? NIA
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.
I. 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. SwaIes shall not be filled in, piped, or altered except as necessary to provide driveway crossings.
4. Built-uponarea 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 aspermitted.
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 [phone] 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.
L 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 (}{
• 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: Fez G
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): Stroud Engineering, P.A.
Mailing Address: 151-A Hwy 24
City: Morehead City
Phone: [phone]
VIII. APPLICANT'S CERTIFICATION
State: NC Zip: 28557
Fax: ( 252 ) 247-4098
I, (print or type name of person listed in General Information, item 2) Thomas Ryan Member
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 recor d, and that the proposed project complies with the requirements of 15A
NCAC 2H .100 .
Signature: r, Date' �� b
Fonn SWU-101 Version 3.99 Page 4 of

'��SWQ "d3��
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
UNDERGROUND INFILTRATION TRENCH 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
underground infiltration trench supplement for each system, design calculations, and plans and specifications
showing all stormwater conveyances and system details.
I. PROJECT INFORMATION
Project Name: The Grande Villas @ The Preserve
Contact Person: Thomas Ryan Phone Number: (919 ) 844-9025
For projects with multiple infiltration systems, a supplement form must be completed for each system. This
worksheet applies to: Trench 1 in Drainage Area 1
(from plans) (from Form SWU-101)
IL DESIGN INFORMATION (attach supporting calculations/documentation):
Soils Report Summary (based upon an actual field investigation and soil borings)
Soil Type
Newhan
PA'Jg/a/ac��%.
Infiltration Rate
12.0
in/hr or cf/hr/sf (circle appropriate units)
in
SHWT Elevation
5.0
(Seasonal High Water Table elevation)
Trench Design Parameters
Design Volume
6,790.85
c f
Dcsign Storm
1.51,
inch event (1.5 inch event for Sal waters, I inch event for others)
Drawdown Time
0.049
days
Perforated Pipe Size
30"
inch diameter
Perforated Pipe Length
770
ft.
No. Observation Wells
NONE
(may be required on a case -by -case basis)
Stone Type (if used)
#57
Stone Void Ratio
0.4
Trench Elevations (in feet mean sea level)
Bottom Elevation
11.40'
fmsl
Storage/Overflow Elevation
13.90
fmsl
Form SWU-107 Rev 3.99 Page t of 4

Trench Dimensions
Height 2.50 ft. Length
Width 7.50 ft. Volume Provided
III. REQUIRED ITEMS CHECKLIST
185 ft.
(0,822.20 cu.ft.
The following checklist outlines design requirements per the Stormwater Best Management Practices manual (N.C.
Department of Environment, Health and Natural Resources, November 1995) 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
R 1 a. System is located 50 feet from class SA waters and 30 feet from other surface waters.
6ZOC 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.
P-p-c_ d. Bottom of the system is 3 feet above any bedrock or impervious soil horizon.
�-; e. Off-line system, runoff in excess of the design volume bypasses the system (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 based upon infiltration
through the bottom only (a hydrogeologic evaluation may be required).
g. Soils have a minimum hydraulic conductivity of 0.52 inches per hour.
Q.tOC. h. System is not sited on or in fill material or DWQ approval has been obtained.
i. 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.
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.
_ k. 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.
1. System captures and infiltrates the runoff from the first 1.0 inch of rainfall (1.5 inch event
for areas draining to SA waters ).
t _ m. Drainage area for the device is less than 5 acres.
n. A pretreatment device ( filter strip, grassed swale, sediment trap, etc.) is provided.
K K_ o. Trench bottom is covered with a layer of clean sand to an average depth of 4 inches.
p. Sides of the infiltration trench are lined with geotextile fabric.
q. Rock used is free of fines (washed stone) and has a large void ratio.
a4ac— r. Side to bottom area ratio is less than 4:1.
Fonn SWU-107 Rev 3.99 Page 2 of 4

s. Observation well(s) are provided (case -by -case basis).
JA 'Vegetated filter is provided for overflow (50 feet for SA waters, 30 feet for other waters)
and detail is shown on plans.
u. A benchmark for checking sediment accumulation is provided.
IV. UNDERGROUND INFILTRATION TRENCH OPERATION AND MAINTENANCE AGREEMENT
After every runoff producing rainfall event and at least monthly inspect the bypass/overflow structure for
blockage and deterioration and the infiltration system for erosion, trash accumulation, grass cover, and general
condition.
2. Repair eroded areas immediately, re -seed as necessary to maintain adequate vegetative cover, mow vegetative
cover to maintain a maximum height of six inches, and remove trash and blockages as needed to maintain
system performance.
Remove accumulated sediment annually or when depth is reduced to 75% of the original design depth. Restore
depth to 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.
4. The water level in any monitoring wells will be recorded after a 1 inch rainfall event and at least once a month.
Chronic high water table elevations (within 1 foot of the bottom of the system for a period of three months)
shall be reported to DWQ immediately.
5. If DWQ determines that the system is failing, the system will immediately be repaired or replaced 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.
Remove accumulated sediment from the infiltration system annually or when depth in the 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 infiltration system. 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 depth at the benchmark reads 3.02 , the accumulated sediment shall be removed
from the system.
Form SWU-107 Rcv 3.99 Page 3 of 4

I acknowledge and agree by my signature below that I am responsible for maintaining the stormwater
collection system in accordance with the six 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: Thomas Ryan/ Member
Address: 8414 Falls of the Neuse Rd. Raleigh, NC 27615
Phone: (919)
Signature:
Date: l 11 D lb
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 stthdivision has been named the president.
I, a Notary Public for th State of K Ty County of �
do hereby certify that a YAJJ personally appeared before me this )AP
day of & 00 b , and acknowledge the due execution of the forgoing infiltration basin maintenance
requirements. Witness my hand and official seal,
BONNIE S. OUSI.T
Notary Public, State of New York
No.OIDU5027899
SEAL My commission expires QUelified in New York County
ommission Expires May 23, 6
a04
Form SWU-]07 Rev 3.99 Page 4 of 4

Permit Noll a �4
(to be provided b DWQ)
State of North Carolina
Department of Environment and Natural Resources
Division of Water Quality
STORMWATER MANAGEMENT PERMIT APPLICATION FORM
UNDERGROUND INFILTRATION TRENCH 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
underground infiltration trench supplement for each system, design calculations, and plans and specifications
showing all stormwater conveyances and system details.
I. PROJECT INFORMATION
Project Name :
The Grande Villas @ The Preserve
Contact Person: Thomas Ryan
Phone Number: (919 ) 844-9025
For projects with multiple infiltration systems, a supplement form must be completed for each system. This
worksheet applies to: Trench 2 in Drainage Area 2
(from plans) (from Form SWU-101)
11. DESIGN INFORMATION (attach supporting calculations/documentation):
Soils Report Summary (based upon an actual field investigation and soil horings)
Soil Type Fripp & Newhan oin/N
/—)kGPd r-tr -Infiltration Rate 12.0' or cf/hr/sf (circle appropriate units)
SHWT Elevation 5' fmsl (Seasonal High Water Table elevation)
Trench Design Parameters
Design Volume
3,012.79
Design Storm
1.51,
Drawdown Time
0.046
Perforated Pipe Size �
30"
Perforated Pipe Length
No. Observation Wells NONE
Stone Type (if used)
#57
Stone Void Ratio
0A
Trench Elevations (in feet mean sea level)
Bottom Elevation
7.00'
Storage/Overflow Elevation
9.50'
c. f.
inch event (1.5 inch event for SA waters, 1 inch event for others)
days
inch diameter
ft.
fmsl
fmsl
(may be required on a case -by -case basis)
Fonn SWU-107 Rev 3.99 Page I of 4

Trench Dimensions
Height 2.50 ft. Length
Width 7.50 ft. Volume Provided
III. REQUIRED ITEMS CHECKLIST
[2.0 ft.
3, 18C7, 6o cu.ft.
The following checklist outlines design requirements per the Stormwater Best Management Practices manual (N.C.
Department of Environment, Health and Natural Resources, November 1995) 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
R0<_ a. System is located 50 feet from class SA waters and 30 feet from other surface waters.
Ak_ 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. Off-line system, runoff in excess of the design volume bypasses the system (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 based upon infiltration
through the bottom only (a hydrogeologic evaluation may be required).
g. Soils have a minimum hydraulic conductivity of 0.52 inches per hour.
h. System is not sited on or in fill material or DWQ approval has been obtained.
t- i. 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.
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.
k. 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.
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 ).
929< ., m. Drainage area for the device is less than 5 acres.
Q n. A pretreatment device ( filter strip, grassed swale, sediment trap, etc.) is provided.
"_ o. Trench bottom is covered with a layer of clean sand to an average depth of 4 inches.
p. Sides of the infiltration trench are lined with geotextile fabric.
Rock used is free of fines (washed stone) and has a large void ratio.
Side to bottom area ratio is less than 4:1.
Form SWU-107 Rev 3.99
Page 2 of 4

1A s. Observation well(s) are provided (case -by -case basis).
1N�Pitt t. Vegetated filter is provided for overflow (50 feet for SA waters, 30 feet for other waters)
n and detail is shown on plans.
11�3)u. A benchmark for checking sediment accumulation is provided.
IV. UNDERGROUND INFILTRATION TRENCH OPERATION AND MAINTENANCE AGREEMENT
1. After every runoff producing rainfall event and at least monthly inspect the bypass/overflow structure for
blockage and deterioration and the infiltration system for erosion, trash accumulation, grass cover, and general
condition.
2. Repair eroded areas immediately, re -seed as necessary to maintain adequate vegetative cover, mow vegetative
cover to maintain a maximum height of six inches, and remove trash and blockages as needed to maintain
system performance.
3. Remove accumulated sediment annually or when depth is reduced to 75% of the original design depth. Restore
depth to 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.
4. The water level in any monitoring wells will be recorded after a 1 inch rainfall event and at least once a month.
Chronic high water table elevations (within 1 foot of the bottom of the system for a period of three months)
shall be reported to DWQ immediately.
5. If DWQ determines that the system is failing, the system will immediately be repaired or replaced to original
design specifications. if the system cannot be repaired to perform its design function, other stormwater control
devices as allowed by NCAC 2H A000 must be designed, approved and constructed.
6. Remove accumulated sediment from the infiltration system annually or when depth in the 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 infiltration system. 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 depth at the benchmark reads 2.87 , the accumulated sediment shall be removed
from the system.
Form S WU- ] 07 Rev 3.99 Page 3 of 4

.j-
I acknowledge and agree by my signature below that I am responsible for maintaining the stormwater
collection system in accordance with the six 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: Thomas Ryan 1 Member
Address: 8414 Falls of the Neuse Rd. Raleigh, NC 27615
Phone: (919)
Signature:(
Date
0
Note: The legally responsible part} should not be a homeowners association unless more than 30% of the lots have been sold and a
resident of the subdivision has been named the president.
S() dud a Notary Public for the SjatVof . County of �
!�! do hereby certify that f i personally appeared before me this
day of �,:Bo and acknowledge the due execution of the forgoing infiltration basin maintenance
requirements. Witness my hand and official seal,
f
BONNIE S. Dust►N
Notary Public, State of New York
SEAL My commission expires No. 01DUK27899'unty
� yafi to t
COMMission Expires May
Form SWU-lo7 Rev 3.99 Page 4 of 4