SW8040345_CURRENT PERMIT_20040629

STORMWATER DIVISION CODING SHEET
POST -CONSTRUCTION PERMITS
PERMIT NO.
SW ?XJ`t 0�`i�
DOC TYPE
� CURRENT PERMIT
❑ APPROVED PLANS
❑ HISTORICAL FILE
❑ COMPLIANCE EVALUATION INSPECTION
DOC DATE
YYYYMMDD

o�oF w A rF,�pG
co �r
Michael F. Easley, Governor
William G. Ross Jr., Secretary
North Carolina Department of Environment and Natural Resources
Alan W. Klimek, P.E.,Director
p t Division of Water Quality
Coleen H. Sullins, Deputy Director
Division of Water Quality
June 29, 2004
-,Mr. Ronald Bryant
TP Inc.
P.O. Box 2658
Surf City, NC 28445
Subject: Stormwater Permit No. SW8 040345
Crosswinds Townhomes — Phase IV
High Density Project
Pender County
Dear Mr. Bryant:
The Wilmington Regional Office received a complete Stormwater Management Permit
Application for Crosswinds Townhomes — Phase IV on June 25, 2004. Staff review of the plans
and specifications has determined that the project, as proposed, will comply with the Stormwater
Regulations set forth in Title 15A NCAC 2H.1000, We are forwarding Permit No. SW8 040345
dated June 29, 2004, for the construction of the subject project.
This permit shall be effective from the date of issuance until June 29, 2014, and shall be subject
to the conditions and limitations as specified therein. Please pay special attention to the
Operation and Maintenance requirements in this permit. Failure to establish an adequate system
for operation and maintenance of the stormwater management system will result in future
compliance problems.
If any parts, requirements, or limitations contained in this permit are unacceptable, you have the
right to request an adjudicatory hearing upon written request within thirty (30) days following
receipt of this permit. This request must be in the form of a written petition, conforming to
Chapter 150B of the North Carolina General Statutes, and filed with the Office of Adininistrative"
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
Laurie Munn, or me at [phone].
Sincerely,
Rick Shiver
Water Quality Regional Supervisor
RSS/Ism: S:1WQSISTORMWATIPERMIT1040345.jun04
cc: Jason Williams
Pender County Building Inspections
Laurie Munn
LW.ilmington.Regional=0.ffice
Central Files
N. C. Division of Water Quality 127 Cardinal Drive Extension [phone]
Wilmington Regional Office Wilmington, NC 28405 [phone] Fax
Customer Service
1 800 623-7748

State Stormwater Management Systems
Permit No. SW8 040345
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
TP Inc.
Crosswinds Townhomes — Phase IV
Pender County
FOR THE
construction, operation and maintenance of 2 infiltration basins and 2 infiltration trenches in
compliance with the provisions of 15A NCAC 2H .1000 (hereafter referred to as the "stormwater
rules') and the approved stormwater management plans and specifications and other supporting
data as attached and on file with and approved by the Division of Water Quality and considered a
part of this permit.
This permit shall be effective from the date of issuance until June 29, 2014, and shall be subject
to the following specified conditions and limitations:
I. DESIGN STANDARDS
l . This permit is effective only with respect to the nature and volume of stormwater
described in the application and other supporting data.
2. This stormwater system has been approved for the management of stormwater runoff as
described on page 3 of this permit, the Project Data Sheet. The stormwater control has
been designed to handle the runoff from 40,939 square feet of impervious area. This
system must be operated with a 50' vegetated filter.
3. The tract will be limited to the amount of built -upon area indicated on page 3 page 4 of
this permit, and per approved plans.
4. All stormwater collection and treatment systems must be located in either dedicated
common areas or recorded easements. The final plats for the project will be recorded
showing all such required easements, in accordance with the approved plans.
5. The runoff from all built -upon area within the permitted drainage area of this project must
be directed into the permitted stormwater control system.
Page 2 of 8

State Stormwater Management Systems
Permit No. SW8 040345
The
following design criteria have been provided
in the infiltration
basin and must be
maintained at design condition:
DA 2
DA 3
a.
Drainage Area, acres:
0.31
0.3
Onsite, ft2:
1313219-
13,068
Offsite, ft2:
none, per engineer
b.
Total Impervious Surfaces, ft2:
12,852
6,426
C.
Design Storm, inches:
1.5
1.5
d.
Basin Depth, feet:
1.75
1.75
e.
Bottom Elevation, FMSL:
5.25
5.25
f
Bottom Surface Area, ft2:
516
219
g.
Bypass Weir Elevation, FMSL:
7.0
7.0
h.
Permitted Storage Volume, ft3:
1,530
835
i.
Type of Soil:
Sand
Sand
j.
Expected Infiltration Rate, in/Ytr:
27.5
27.5
k.
Seasonal High Water Table, FMSL:
3.15
3.25
1.
Time to Draw Down, hours:
1.3
1.6
M. Receiving Stream/River Basin
ICWW / Cape Fear.
n.
Stream Index Number:
18-87-(5.5)
o.
Classification of Water Body:
"SA HQW"
The
following design criteria have been provided in the infiltration trench and must be
maintained at design condition:
DA 1
DA 4
a.
Drainage Area, acres:
0.59
0.09
Onsite, ft2:
25,854
3,920
Offsite, ftz:.
none, per engineer
b.
Total Impervious Surfaces, ft :
17,741
3,920
C.
Design Storm, inches:
1.5
1.5
d.
Trench Dimensions, L x W x H, ft:
266'xl0'xl'
114'x10 x1'
e.
Perforated Pipe Diameter/Length:
6" / 266'
6" / 144'
f.
Bottom Elevation, FMSL:
5.45
5.25
g.
Bypass Weir Elevation, FMSL:
6.9
6.9
h.
Permitted Storage Volume, ft3:
2,174
469
i.
Type of Soil:
Sand
Sand
j.
Expected Infiltration Rate, in/hr:
27.5
27.5
Page 3 of 8

State Stormwater Management Systems
Permit No. SW8 040345
k. Seasonal High Water Table, 1;MSL: 3.45 3.25
I. Time to Draw Down, hours: 0.18 0.18
M. Receiving Stream/River Basin: ICWW / Cape Fear
n. Stream Index Number: 18-87-(5.5)
o. Classification of Water Body: "SA HQW"
II. SCHEDULE OF COMPLIANCE
I . The stormwater management system shall be constructed in its entirety, vegetated and
operational for its intended use prior to the construction of any built -upon surface.
2. During construction, erosion shall be kept to a minimum and any eroded areas of the
system will be repaired immediately.
3. The permittee shall at all times provide the operation and maintenance necessary to assure
the permitted stormwater system functions at optimum efficiency. The approved
Operation and Maintenance Plan must be followed in its entirety and maintenance must
occur at the scheduled intervals including, but not limited to:
a. Semiannual scheduled inspections (every 6 months).
b. Sediment removal
C. Mowing and revegetation of slopes and the vegetated filter.
d. Immediate repair of eroded areas.
e. Maintenance of all slopes in accordance with approved plans and specifications.
f. Debris removal and unclogging of outlet structure, orifice device, flow spreader,
catch basins and piping.
g. A clear access path to the outlet structure must be available at all times.
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. The facilities shall be constructed as shown on the approved plans. This permit shall
become voidable unless the facilities are constructed in accordance with the conditions of
this permit, the approved plans and specifications, and other supporting data.
6. Upon completion of construction, prior to issuance of a Certificate of Occupancy, and
prior to operation of this permitted facility, a certification must be received from an
appropriate designer for the system installed certifying that the permitted facility has been
installed in accordance with this permit, the approved plans and specifications, and other
supporting documentation. Any deviations from the approved plans and specifications
must be noted on the Certification. A modification may be required for those deviations.
7. If the stormwater system was used as an Erosion Control device, it must be restored to
design condition prior to operation as a stormwater treatment device, and prior to
occupancy of the facility.
8. Access to the stormwater facilities shall be maintained via appropriate easements at all
times.
9. The permittee shall submit to the Director and shall have received approval for revised
plans, specifications, and calculations prior to construction, for any modification to the
approved plans, including, but not limited to, those listed below:
a. Any revision to any item shown on the approved plans, including the stormwater
management measures, built -upon area, details, etc.
Page 4 of 8

State Stormwater Management Systems
Permit No. SW8 040345
b. Project name change.
C. Transfer of ownership.
d. Redesign or addition to the approved amount of built -upon area or to the drainage
area.
e. Further subdivision, acquisition, lease or sale of all or part of the project area. The
project area is defined as all property owned by the permittee, for which
Sedimentation and Erosion Control Plan approval or a CAMA Major permit was
sought.
f. Filling in, altering, or piping of any vegetative conveyance shown on the approved
plan.
10. The permittee shall submit final site layout and grading plans for any permitted future
areas shown on the approved plans, prior to construction.
11. A copy of the approved plans and specifications shall be maintained on file by the
Pennittee for a minimum of ten years from the date of the completion of construction.
12. The Director may notify the permittee when the permitted site does not meet one or more
of the minimum requirements of the permit. Within the time frame specified in the notice,
the permittee shall submit a written time schedule to the Director for modifying the site to
meet minimum requirements. The permittee shall provide copies of revised plans and
certification in writing to the Director that the changes have been made.
III. GENERAL CONDITIONS
This permit is not transferable except after notice to and approval by the Director. In the
event of a change of ownership, or a name change, the permittee must submit a formal
permit transfer request to the Division of Water Quality, accompanied by a completed
name/ownership change form, documentation from the parties involved, and other
supporting materials as may be appropriate. The approval of this request will be
considered on its merits and may or may not be approved. The permittee is responsible
for compliance with all permit conditions until such time as the Division approves the
transfer request.
2. Failure to abide by the conditions and limitations contained in this permit may subject the
Permittee to enforcement action by the Division of Water Quality, in accordance with
North Carolina General Statute 143-215.6A to 143-215.6C.
3. The issuance of this permit does not preclude the Permittee from complying with any and
all statutes, rules, regulations, or ordinances, which maybe imposed by other government
agencies (local, state, and federal) having jurisdiction.
4. In the event that the facilities fail to perform satisfactorily, including the creation of
nuisance conditions, the Permittee shall take immediate corrective action, including those
as may be required by this Division, such as the construction of additional or replacement
stormwater management systems.
The permittee grants DENR Staff permission to enter the property during normal business
hours for the purpose of inspecting all components of the permitted stormwater
management facility.
6. The permit may be modified, revoked and reissued or terminated for cause. The filing of
a request for a permit modification, revocation and reissuance or termination does not
stay any permit condition.
7. Unless specified elsewhere, permanent seeding requirements for the stormwater control
must follow the guidelines established in the North Carolina Erosion and Sediment
Control Planning and Design Manual.
Page 5 of 8

State Stormwater Management Systems
Permit No. SW8 040345
S. Approved plans and specifications for this project are incorporated by reference and are
enforceable parts of the permit.
9. The permittee shall notify the Division any name, ownership or mailing address changes
within 30 days.
Permit issued this the 29th day of June 2004.
NORT CAROLINA ENVIRONMENTAL MANAGEMENT COMMISSION
Alan W. Klimek, P.E., Director
Division of Water Quality
By Authority of the Environmental Management Commission
Page 6 of 8

State Stormwater Management Systems
Permit No. SW8 040345
Crosswinds Townhomes — Phase 1V
Stormwater Permit No. SW8 040345
Pender County
Designer's Certification
1, , as a duly registered in the
State of North Carolina, having been authorized to observe (periodically/ weekly/ full time) the
construction of the project,
(Project)
for (Project Owner) hereby state that, to the best of
my abilities, due care and diligence was used in the observation of the project construction such
that the construction was observed to be built within substantial compliance and intent of the
approved plans and specifications.
The checklist of items on page 2 of this form is included in the Certification.
Noted deviations from approved plans and specification:
Signature
Registration Number
Date
SEAL
Page 7 of 8

State Stormwater Management Systems
Permit No. SW8 040345
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.
�. 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 outlet/bypass structure elevations are per the approved plan.
6. The outlet structure is located per the approved plans.
7. 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. Required drawdown devices are correctly sized per the approved plans.
13. All required design depths are provided.
14. All required parts of the system are provided, such as a vegetated shelf, and a
forebay.
15. - The required system dimensions are provided per the approved plans.
cc: NCDENR-DWQ Regional Office
Pender County Building Inspections
Page 8 of 8

Mr. Ronald Bryant
Crosswinds Townhomes — Phase IV.
Stormwater Permit No. SW8 040345
Designer's Certification
I, Wr, 13 p as a duly registered P—n 1 n.c- in the
State of North Carolina, having been authorized to observe (pedddically / weekly 1 full time) the
construction of the project,
o SS W l Irl ilcs V-1, -�V�asc- kv (Project)
for I_ r t !%C- . _ _ _(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.
Required Items to be checked for this certification to be considered complete are on page 2 of
this form.
Noted deviations from approved plans and specifications:
�• Signature SEAL .
Registration Number 1 �$i _ _ Q� ••
Date 12 1 M : a� SEAL
16879 �
CEIVED
f JAIL 2 4 2011
,13Y:
Page 3 of 4

Mr. Ronald Bryant
Crosswinds Townhomes — Phase IV
Stormwater Permit No. SW8 040345
Certification Requirements: Page 2 of 2
✓ 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.
V-""3. All the built -upon area associated with the project is graded such that the runoff
drains to the system.
✓ 4. The outlet/bypass structure elevations are per the approved plan.
✓ 5. The outlet structure is located per the approved plans.
N h 6. Trash rack is provided on the outlet/bypass structure.
V"'7. Alf slopes are grassed with permanent vegetation.
�. Vegetated slopes are no steeper than 3:1.
�9. The inlets are located per the approved plans and do not cause short-circuiting of
the system.
✓10. The permitted amounts of surface area and/or volume have been provided.
11. Required drawdown devices are correctly sized per the approved plans.
,--'l2. All required design depths are provided.
�_<1.3. All required parts of the system are provided, such as a vegetated shelf, and a
forebay.
14. The dimensions of the system, as shown on the approved plans, are provided.
cc: NCDENR-DWC
Town of Surf City
Page 4 ol'4

'C3FFICEUSE�OI�LY.r „
Date Received
Fee Paid
Permit Number
to E O
U7V-0 1t Llvw"
w 3 K S
(92a-70 tt Ll ( a 5-
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):
Ronald Bryant— TP Inc.
2. Print Owner/Signing Official's name and title (person legally responsible for facility and compliance):
Ronald Brvant— Owner/uresident
3. Mailing Address for person listed in item 2 above:
PO Box 2658
City: Surf City State: NC Zip: 28445
Telephone Number: ( 910 } 3 2 8— 6 9 6 9
4. Project Name (subdivision, facility, or establishment name - should be consistent with project name on
plans, specifications, letters, operation and maintenance agreements, etc.):
Crosswinds Townhomes—Phase IV
5. Location of Project (street address):
Hvy 50 (South �`1'opsail Drive)
City: _ Surf City County: PPndpr
6. Directions to project (from nearest major intersection):
From intersection of Hwy 50/210, follow Hwy 50 southwest approximately
n. 75 mi l PG . Crossi•7i nds is 1 nratPr3 0.28 miles. on left., past Charlotte
Ave.
7. Latitude: 3 4° 2 5 ' 12 . 8 " Longitude: 7711 3 3 ' 19 . 5 " of project
8. Contact person who can answer questions about the project:
Name: R. Mark��'wal ten Telephone Number: ( 910 ) 259-4800
II. PERMIT INFORMATION:
1. Specify whether project is (check one):
x 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) N/A
3. Specify the type of project (check one):
Low Density X High Density Redevelop General Permit Other
4. Additional Project Requirements (check applicable blanks):
�CAMA Major x Sedimentation/Erosion Control _404/401 Permit NPDES Stormwater
Information on required state permits can be obtained by contacting the Customer Service Center at
1-877-623-6748. -
III. PROJECT INFORMATION
1. In the space provided below, summarize how stormwater will be treated. Also attach a detailed narrative
(one to two pages) describing stormwater management for the project .
Thprp will be no treatment of stormwater other than permanent infiltration
basins and trenches.
2. Stormwater runoff from this project drains to the Intracoastal waterway P4wpr basin.
3. Total Project Area: 1.58 acres
4. Project Built Upon Area: 60 %
5. How many drainage areas does the project have? 4
6. Complete the following information for each drainage area. If there are more than two drainage areas in the
project, attach an additional sheet with the information for each area provided in the same format as below.
Bas Mftformaiion
mw � Drainage Area 1
a 4 Drazr►age Area 2 :
Receiving Stream Name
Intracoastal Waterway
Intracoastal waterway
Receiving Stream Class
SA
Drainage Area
25,854
Existing Impervious* Area
Pro osed Irn ervious"Area
0
12-,, f3S7— sF.
9 6 .4 0
% Impervious* Area (total)
4 6 %
I erviaus*Surface AreasMW
DrargefA{area"1 k
nD:rainag Area 2k'
On -site Buildings
6,426 s f
12,852 s f
On -site Streets
11,315 s f
On -site Parking
On -site Sidewalks
Other on -site
Off -site
Total: 17 , 7 41 s f
Tote 12,852 s f .Y
* 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 3.94 Page 2 of 4

7. How was the off -site impervious area listed above derived? N/A
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 N/A 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 pe7 formed 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 [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.
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 R+M to
• One copy of the applicable Supplement Form(s) for each BMP RNW
• Permit application processing fee of $4,2&(payable to NCDENR)
• Detailed narrative description of stormwater treatment/management �M
• Two copies of plans and specifications, including:
- Development/Project name
- Engineer and firm
- Legend
- North arrow
- Scale
- Revision number & date
- Mean high water line
- Dimensioned property/project boundary
- Location map with named streets or NCSR numbers
- Original contours, proposed contours, spot elevations, finished floor elevations
- Details of roads, drainage features, collection systems, and stormwater control measures
- Wetlands delineated, or a note on plans that none exist
- Existing drainage (including off -site), drainage easements, pipe sizes, runoff calculations
- Drainage areas delineated
- Vegetated buffers (where required)
VII. AGENT AUTHORIZATION
If you wish to designate authority to another individual or firm so that they may provide information on your
behalf, please complete this section.
Designated agent (individual or firm): R . Ma rk"IWA 1 ton— Walton Enciino r i n
Mailing Address. PO?Box 895
City: BLS rs}aw State:_ rT r Zip: 2 8 4 2 5
Phone: ( 910 ) 259-4800 Fax: (- 910 ) 259-1779
VIII. APPLICANT'S CERTIFICATION
I, (print or type name of person listed in General Information, item 2) Rdr)CJ c R K
certify that the information included on this permit application form is, to the best of my knowledge, correct and
that the project will be constructed in conformance with the approved plans, that the required deed restrictions
and protective covenants will be recorded, and that the proposed project complies with the requirements of 15A
NCAC 2H .1000.
Signature:
Date:
Form SWU-101 Version 3.99 Page 4 of 4

Stormwater Management Permit Application Form
Part 111. Project Information Con't.
Basin information....
Drainage Area 3, =;. _
- . Drainage Area 4 `.
Receiving Stream Name
Intracoastal Waterway
Intracoastal Waterway
Receiving Stream Class
SA
SA
Drainage Area
13,068 s.f.
3,920 s.f.
Existing Im ervioue Area
6,426 s.f.
3,920 s.f.
Proposed Impervious* Area
0
0
% Impervious Area (total)
50%
100%
lm ervious'.Surface Area
Drainage Area'3::=....
Draina e'Area 4
On -site Buildings
6,426 s.f.
0
On -site Streets
0
3,920 s.f.
On -site Parking
0
0
On -site Sidewalks
0
0
Other on -site
0
0
Off -site 1
0
0
Total: 6,426 s.f.
Total: 3,920 s.f.
"Impervious area is defined as the built upon area including, but not limited to,
buildings, roads, parking areas, sidewalks, gravel areas, etc.

;'t ► r�Ft�_ :r 1_1J` -fro AI.)1' �Fti3fi�";•�gi��•r :tC
r' _.3.�__i ._ - _` '._... !1u^ 'Ydi:-.�?�i_.',�1. �h ':�• 'Ti�;Y�+ +Yi /--i grit
,',fir

Permit No. 'SAA) K 0 W 3'Lff-
(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 : -�r� �f.n-� Ta ...m b p � —
Contact Person: R . Mark —jda i r. n n Phone Number: a -
For projects with multiple infiltration systems, a supplement form must be completed for each system. This
worksheet applies to: TrenctB 1 d g . C & L azz y in Drainage Area 1
(from plans) Day Dr. (from FormSWU-101)
II. DESIGN INFORMATION (attach supporting calculations/documentation):
Soils Report Summary (based upon: an actual field investigation and soil borings)
Soil Type Sand
Infiltration Rate 27.5 in/hr or cf/hr/sf (circle appropriate units)
SHWT Elevation 3.45 fmsl (Seasonal High Water Table elevation)
Trench Design Parameters
Design Volume
Design Storm
Drawdown Time
Perforated Pipe Size
Perforated Pipe Length
No. Observation Wells
Stone Type (if used)
Stone Void Ratio
2, 174 c.f.
1.5 inch event (I.5 inch event for SA waters, 1 inch event for others)
0.1 days
6 inch diameter
266 ft.
N/A (may be required on a case -by -case basis)
#57-stone
o'4o
Trench Elevations (in feet mean sea level)
Bottom Elevation 5.45
Storage/Overflow Elevation r-
fmsl
fnnsl
Form SWU-1o7 Rev 3.99 Page I of 4

Trench Dimensions
Height
Width
10 ft.
See Calcs.
III. REQUIRED ITEMS CHECKLIST
Length ft. (2) S e e
Volume Provided 2,174 cu ft Calcs,
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
i� 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.
r'^ c. Bottom of system is at least 2 feet above the seasonal high water table.
M 6j d. Bottom of the system is 3 feet above any bedrock or impervious soil horizon.
M0 e. Off-line system, runoff in excess of the design volume bypasses the system (bypass detail
provided).
onal 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.
�1`^�.,._• h.
System is not sited -on or in fill material or DWQ approval has been obtained.
i.
Pions 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.
M•yJ 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.
f. System is designed to draw down the design storage volume to the proposed bottom
r\ r"`' �� 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.
t� M' 1. System captures and infiltrates the runoff from the first 1.0 inch of rainfalV"(1.5 nch event
for areas draining to SA waters ).
elevation under seas
P'e�' 'Ai
m. Drainage area for the device is less than 5 acres.
-, M In./ n. A pretreatment device ( filter strip, grassed swale, sediment trap, etc.) is provided.
2 M w o. Trench bottom is covered with a layer of clean sand to an average depth of 4 inches.
—_ Kft �J' _ p. Sides of the infiltration trench are lined with geotextile fabric.
KVVV k' q. Rock used is free of fines (washed stone) and has a Iarge void ratio.
(Z' f/ti r. Side to bottom area ratio is less than 4:1.
Form SWU-t07 Rev 3.99 Page 2 of 4

'211K
1A
s_ Observation well(s) are provided (case -by -case basis).
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.
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 I inch rainfall event and at least once a month.
Chronic high water table elevations (within I 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 storib- 6at'eetontroi
devices as allowed by NCAC 2H .1000 must be designed, approved and constructed.
6. Remove accumulated sediment from the infiltration system annually or when depth zii•thetinit 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 (Le.
stockpiling near a stormwater treatment device or stream, etc.).
A"bencliiriark shaU, e estabhli licd-in tfie iiifiltration 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.
a
When the depth at the benchmark reads , the accumulated sediment shall be removed
from the system.
RE C E I V
?004
Form 5WU-107 Rev 3.99
Page 3 of 4
Dwo
PRW #__ =ter:.—; -. -

s. Observation well(s) are provided (case -by -case basis).
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 AG
1. After every runoff producing rainfall event and at least monthly inspect the bypass/overflow stru96re for
blockage and deterioration and the infiltration system for erosion, trash accumulation, grass c er, and general
condition.
2. Repair eroded areas immediately, re -seed as necessary to maintain adequate vegetativ over, mow vegetative
cover to maintain a maximum height of six inches, and remove trash and blockages s needed to maintain
system performance.
3. Remove accumulated sediment annually or when depth is reduced to 75% o e original design depth. Restore
depth to original design depth without over -excavating. Over -excavating ay cause the required water table
separation to be reduced and may compromise the ability of the system perform as designed.
4. The water level in any monitoring wells will be recorded after a 1 i h rainfall event and at least once a month.
Chronic high water table elevations (within 1 foot of the bottom the system for a period of three months)
shall be reported to DWQ immediately.
S. If DWQ determines that the system is failing, the system 1 immediately be repaired or replacedto original
design specifications. If the system cannot be repaired t perform its design function; other stormwater'control
devices as allowed by NCAC 2H .1000 must be desig d, approved and constructed...,- ; -.,
6. Remove accumulated sediment from the infil
to 75% of the original design depth. The
over -excavating. Over -excavating may
compromise the ability of the system to
an appropriate manner and shall not b
stockpiling near a stormwater treatmgfit
r ion system annually or when depth'in•thelanit is reduced
m shall be restored to the original design depth without
the required water table separation to be reduced and may
m as designed. Removed sediment shall be disposed of in
d in a manner that will adversely impact water quality (i.e.
device or stream, etc.).
A benchmark shall be establishe to the infiltration system. The benchmark will document the original
design depth so that accurate spaiment accumulation readings can be taken. The measuring device used
to determine the depth at the enchmark shall be such that it will give an accurate depth reading and not
readily penetrate into accurdulated sediments.
When the depth at the benchmark reads N/A , the accumulated sediment shall be removed
from the system.
Form SWU-107 Rev 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: Ronald Bryant- owner
Address: Po Box 2658
Phone: 91t]-3 8-6969 Date: 5/27/04
Signature.
Note: The legally responsible party should not be a homeowners association unless more than 50% of the lots have been sold and
a resident of the subdivision has been named the president.
I, _ 1 tL A - V u'r� , a Notary Public for the State of _.N C _ , County of
do hereby certify that I?-Or'z'-U (3 cu.j� personally appeared before me this
— day of '? , and acknowledge the due execution of the forgoing infiltration
my
basin maintenance requirements. Witness hand and official seal,
• • u yNti.
My commission expires
N , L•,
f+Ci � V j
is
Form SWU-107 Rev 3.99 Page 4 of 4

Permit No. SW g 6 q10
(to be provided by DWQ)
State of North Carolina
Department of Environment and Natural Resources
Division of Water Quality
STORMWATER MANAGEMENT PERMIT APPLICATION FORM
INFILTRATION BASIN SUPPLEMENT
This farm may be photocopied for use as an original
DWQ Stormwater Management Plan Review:
A complete stormwater management plan submittal includes a stormwater management permit application, an
infiltration basin supplement for each system, design calculations, soils report and plans and specifications
showing all stormwater conveyances and system details.
I. PROJECT INFORMATION
Project Name : Crosswinds Townhomes
Contact Person: R. Mark`-Valton Phone Number: ( 910) 259-4800
This works heet applies to: Basin No- Bldg f D & E in Drainage Area 2
(as ideraifwd on ptens) (from Form SWU-101)
H. 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 'Voluime
Drawdown Time
Basin Dimensions
Basin Size
Basin Volume Provided
Basin Elevations
Bottom Elevation
rage Elevation
Top Elevation
sand
27.5 inAu or cf/hr/sf (circle appropriate units)
3.15 fmSl (Seasonal High eater Table elevation)
1 . 5 inch (1.5 inch event far SA waters, 1 inch event far others)
1,530 C.f.� --- - - - - --- - --- -..
0 . 0 5 days
tt. x
S� o c.f.
5.25
fmsl
7.0
fmsl
7 .5
fmsI
ft. = 5 165 sq. ft. (bottom dimensions)
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
,t"�Q a.
System is located 50 feet from class SA waters and 30 feet from other surface waters.
nr1 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.
g,M W 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.
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_
n pn
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.
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 (M V).
lZy \
4y 1.
A pretreatment device such as a catch basin, grease trap, filter strip, grassed swaie or
sediment trap is provided.
�✓ m. Bottom of the device is covered with a layer of clean sand to an average depth of 4 inches
or dense vegetative cover is provided.
n. Vegetated filter is provided for overflow and detail is shown on plans (Required minimum
1 length is 50 feet for SA waters, 30 feet for other waters). _ _. __._
h' o. Flow distribution mechanism within the basin is provided.
f`'I 10� P. A benchmark is provided to determine the sediment accumulation in the pretreatment
device.
K-^ q. Runoff in excess of the design volume bypasses off-line systems (bypass detail provided).
Ifs �yA/ 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.
KVVn 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 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.
1 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 met to the pretreatment unit, the sediment shall be
removed from both the pretreatment unit and the infiltration basin.
If the Division determines that the system is failing, the system will immediately be repaired to original
design specifications. If the system cannot be repaired to perform its design function, other stormwater
control devices as allowed by NCAC 2H .1000 must be designed, approved and constructed.
I acknowledge and agree by my signature below that I am responsible for the performance of the five
maintenance procedures listed above. I agree to notify DWQ of any problems with the system or prior to any
changes to the system or responsible party.
Print Name and Title: Ronald Bryant -owner
Address: Po B.Qx� 2658 , Surf City, NC 28445
91.0-328-6969
Signature:
Date: 5/27/04
Note: The -legally responsible party Aould not be a homeowners association unless more than 50% of the lots have been sold and
a resident of the subdivision has been named the president.
1.
1, 1 i� a Notary Public for the State of , County of
U �fi. do hereby certify that F, F personally appeared before me this 7
day of (yt��+ imW acknowledge the due executio of the forgoing infiltration basin maintenance
requirements. Witness$ d42" al,
•
t
-AL -' My commission expires -
Form S WU-103 Re ��'�.�"� Page 3 of 3

LL
�
s
f, -

Permit No. _ 5_ WE 6L('03q,5—
(to he provided by Dl11Q)
State of North Carolina
Department of Environment and Natural Resources
Division of Water Quality
STORMWATER MANAGEMENT PERWT APPLICATION FORM
INFILTRATION BASIN SUPPLEMENT
This foritr tnay be photocopied for use as an original
DWQ Siormwater Manag_en�ent Plan Review:
A complete stormwater management plan submittal includes a stormwaler management pernut 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 : . Crosswinds Toimhomes
Contact Person R . Mark Walton
This worksheet applies to: Basin No. Bldg. F
fns identified on plans)
Phone Number: 910 259-4800
in Drainage Area 3
(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 reaps are not an acceptable
source of soils information. All elevations shall be in feet mean sea level (fmsl).
Soils Report Summary
Soil Type
lnf.1tration Rate
SHWT Elevation
Basin Design Parameters
Design Storm
Design Volume
Drawdown Time
Basin Dimensions
Basin Size
Basin Volume Provided
Basin Elevations
P -*tom Elevation
age Elevation
Top Elevation
Form SWU-103 Rev 3.99
Sand
2-7 - 5 imfbr or cf/h.T/sf (circle appropriate units)
3.25 fnnsl (Seasonal High Water Table elevation)
1 . 5 inch (1.5 inch event for SA waters, 1 inch event for others)
835 c.f.
0.07 days
ft. x - - ft. = 219 sq. ft. (bottom dimensions)
835 C.f.
5.25 fmsl
7.0 fmsl
745 fmsI
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
6J a. System is located 50 feet from class SA waters and 30 feet from other surface waters.
fM-"t b. System is located at least 100 feet from water supply wells_
V 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.
U e. System is not sited on or in fill material or DWQ approval has been obtained.
&M1A) 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.
f A hJ
JZM 1nJ
tZ M h/
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.
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.
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).
A pretreatment device such as a catch basin, grease trap, filter strip, grassed swale or
sediment trap is provided.
m. Bottom of the device is covered with a layer of clean sand to an average depth of 4 inches
or dense vegetative cover is provided.
n. Vegetated filter is provided for overflow and detail is shown on plans (Require_ d rn_ in_ i_mu_ rr
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
l � w device.
Y~ 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. INFIILTRATION BASIN OPERATION AND AWNTENANCE 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.
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 jeeCin the pretreatment unit, the sediment shall be
removed from both the pretreatment unit and the infiltration basin.
If the Division determines that the system is failing, the system will immediately be repaired to original
design specifications. If the system cannot be repaired to perform its design function, other stormwater
control devices as allowed by NCAC 2H .1000 must be designed, approved and constructed.
I acknowledge and agree by my signature below that I am responsible for the performance of the five
maintenance procedures listed above. I agree to notify DWQ of any problems with the system or prior to any
changes to the system or responsible party.
Print Name and Title: Ronald Bryant- owner
Address: PO Box 2658
Phone: [phone] Date: 5/27/04
Signature
Note: The legally responsible party should not be a homeowners association unless more than 50% of the lots have been sold and
a resident of the subdivision has been named the president.
�L.
Form S WU-103
-off' U• 4
�'�. Off` ••....••�� �.
9 N
Rev 3.99`r11011 01811 011 %%�ti`.
State of County of
dJ personally appeared before me this oC7
on of the forgoing infiltration basin maintenance
-A ~ i
My commission expires
Page 3 of 3

Permit No. 15W,3 oMtn34S
(to be provided by DIVQ)
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: Crosswinds Townhomes
Contact Person: R. Mark"W a 1. t o n
Phone Number: ( 910)-2 5 9- 4 8 0 0 '
For projects with multiple infiltration systems, a supplement form must be completed for each system. This
worksheet applies to. Trench-$lamen at
pp g • _ in Drainage Area 4
(from plans) (from Form SWU-101)
11. DESIGN INFORMATION (attach supporting calculations/documentation):
Soils Report Summary (based upon an actual
field investigation and soil borings) `
Soil Type s a n (I
Infiltration Rate 27.5
in/hr br cf/hr/sf (circle appropriate units)
SHWT Elevation 3.25
fmsl (Seasonal High Water Table elevation)
Trench Design Parameters
Design Volume 469
c.f.
Design Storm 1 .5
inch event (1.5 inch event for SA waters, I inch event for others)
Drawdown Time 0 , 008
days
Perforated Pipe Size 6
inch diameter
Perforated Pipe Length 114
ft.
No. Observation Wells N/A
(may be required on a case -by -case basis)
Stone Type (if used) #57st.nnonp,
Stone Void Ratio �;•`i C�
Trench Elevations (in feet mean sea level)
Bottom Elevation 5.25
fmsl
Storage/Overflow Elevation 7-
fmsl
Form SWU-107 Rev 3.99 Page t of 4 r

Trench Dimensions
Height
Width
ft.
10 ft.
111. REQUIRED ITEMS CHECKLIST
Length
Volume Provided
114 ft.
469 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
�'J a.
System is located 50 feet from class SA waters and 30 feet from other surface waters.
i,w b.
System is located at least 100 feet from water supply wells.
V,) c.
Bottom of system is at least 2 feet above the seasonal high water table.
Vo 0 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).
Soils have hydraulic 0.52 inches hour.
g.
a minimum conductivity of per
Ali 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.
nn
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.
ii'.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.
LN„ N% 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 ).
m.
Drainage area for the device is less than 5 acres.
Ic 4 n.
A pretreatment device ( filter strip, grassed swale, sediment trap, etc.) is provided.
KYAW o.
Trench bottom is covered with a layer of clean sand to an average depth of 4 inches.
�. tA' 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.
YIA W r. Side to bottom area ratio is less than 4:1.
Form SWU-107 Rev 3.99 Page 2 of 4

��
s. Observation well(s) are provided (case -by -case basis).
�- t. Vegetated filter is provided for overflow (50 feet for SA waters, 30 feet for other waters) and
detail is shown on plans.
MAJ 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.
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-.eyent and at leastbnce a month.
Chronic high water table elevations (within 1 foot of the bottom of the system for.a peri ocbrof thred mbriths)
shall be reported to DWQ immediately.
S. If DWQ determines that the system is failing, the system will immediately bercepaired o'racezlo original
design specifications. If the system cannot be repaired to perform its design fiffictfon;. other stormwater control
devices as allowed by NCAC 2H .1000 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 mariner 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 i �� , the accumulated sediment shall be removed
from the system.
tE CE VED
? 9 2004
DWQ
PROD #
Form 5WU-107 Rev 3.99
Page 3 of 4

4)
NC� s. Observation well(s) are provided (case -by -case basis).
�- t. Vegetated filter is provided for overflow (50 feet for SA waters, 30 feet for other waters) and
detail is shown on plans.
R-KnAj. 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 accumulationrass cover, and general
condition.
2. Repair eroded areas immediately, re -seed as necessary to maintain adequate v etative cover, mow vegetative
cover to maintain a maximum height of six inches, and remove trash and b ckages as needed to maintain
system performance.
3. Remove accumulated sediment annually or when depth is reduced t 5% of the original design depth. Restore
depth to original design depth without over -excavating. Over -ex c ating may cause the. required water table
separation to be reduced and may compromise the ability of the ystem to perform as designed...
r
4. The water level in any monitoring wells will be recorded of r a i inch rainfall -event and at least once a month.
Chronic high water table elevations (within 1 foot of the ttom of the systerri1da period of,thred months)
shall be reported to DWQ immediately. „r „
5. If DWQ determines that the system is failing, the s tem will immediately be�repaired or r�placed.to original
design specifications. If the system cannot be re fired to perform its design funcfioti; other, storrriwater control
devices as allowed by NCAC 2H .1000 must b designed, approved and construcEed.
.t'ii9f4ti ,
6. Remove accumulated sediment from the/infiltration system annually or when depth in the unit is reduced
to 75% of the original design depth. T e system shall be restored to the original design depth without
over -excavating. Over -excavating y cause the required water table separation to be reduced and may
compromise the ability of the syst to perform as designed. Removed sediment shall be disposed of in
an appropriate manner and shall of be handled in a manner that will adversely impact water quality (i.e.
stockpiling near a stormwater eatment device or stream, etc.).
A benchmark shall be es lished in the infiltration system. The benchmark will document the original
design depth so that ace rate sediment accumulation readings can be taken. The measuring device used
to determine the dept at the benchmark shall be such that it will give an accurate depth reading and not
readily penetrate in accumulated sediments.
When the depth at the benchmark reads NSA , the accumulated sediment shall be removed
from the system.
Form SWU-107 Rev 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.
Punt Name and Title: Ronald Bryant- owner
Address. PO Box
Phone: [phone] - 6 9
Signature:
Date: 5-27-04
Note: The legally responsible party should not be a homeowners association unless more than 50% of the lots have been sold and
a resident of the subdivision has been named the president.
, a NotaryPublic for t/e State of NOl `) -O ' Countyof
do hereby certi that V r personally appeared before me this
2,-) _ day of , h i� „y and acknowledge the due execution of the forgoing infiltration
basin maintenance requirements. Witness my hand and official seal,
1 w
Z�9 COO
My commission expires 0 -3a 'C) J
Form SWU-107 Rev 3.99 Page 4 of 4