SW7080320_CURRENT PERMIT_20100121

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

F�
NCDENR
North Carolina Department of Environment and Natural Resources
Division of Water Quality
Beverly Eaves Perdue Colleen H. Sullins Dee Freeman
Governor Director Secretary
January 21.2010
Mr. Mike Collins, Chief Executive Officer
Innsbrook Golf and Marina, LLC
55 Beattie Place, Suite 100
Greenville. SC 29601
Subject: Stormwater Permit No. SW7080320 Modification
Innsbrook Clubhouse Villas and Amenity Center
High Density Commercial Bio-Retention Project
Dear Mr. Collins: Bertie County
The Washington Regional Office received a complete Stormwater Management Permit
Application for Innsbrook Clubhouse Villas and Amenity Center Modification on January 11,
2010. Staff review of the plans and specifications has determined that the project, as
proposed, will comply with the Stormwater Regulations set forth in Session Law 2008-211 and
Title 15A NCAC 21-1.1000. We are forwarding Permit No. SW7080320 Modification dated
January 21, 2010, for the construction of the subject project.
This permit shall be effective from the date of issuance until January 21, 2020, shall void Permit
No. SW7080320 Modification dated March 16, 2009, 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 150E 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 Samir Dumpor, or me at [phone].
Al Hodge
Regional Supe r
Surface Water Protection Section
AH/ sd: K:\WPDATA\WQS\Samir - State SW\Permits-Bioretention
cc: Thomas Goodwin, PE, Hobbs, Upchurch and Associates, PA (PO Box 1737,
Southern Pines, NC 28388)
Bertie County Building Inspections
Washington Regional Office
Central Files
North Carolina Division of Water Quality Internet: wiwi newatcrgt x y. tart;
943 Washington Square Mall Phone. [phone] One
Washington, NC 27889 FAX [phone] NorthCarOjtna
An Equal Opportunity/Affirmative Action Employer- 50% Recycled/10% Post Consumer Paper Nat['tral&

State Stormwater Management Systems
Permit No. SW7080320 Modification
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
Innsbrook Golf and Marina, LLC
Innsbrook Clubhouse Villas and Amenity Center Modification
Bertie County
FOR THE
construction, operation and maintenance of 7 bioretention basins. The drainage areas
for basins 1, 2, 4 (originally permitted on April 4, 2008) are in compliance with the
provisions of 1995 Stormwater rules and these rules are still in effect for said basins,
while the drainage areas for basins 3, 5, 6 and 7 are in compliance with the provisions
of Session Law 2008-211 and 15A NCAC 2H .1000 (hereafter referred to as the
"stormwater rules') and the approved stormwater management plans and specifications
and other supporting data as attached and on file with and approved by the Division of
Water Quality and considered a part of this permit.
This permit shall be effective from the date of issuance until January 21, 2020, and
shall be subject to the following specified conditions and limitations:
I. DESIGN STANDARDS
This permit is effective only with respect to the nature and volume of stormwater
described in the application and other supporting data.
2. This stormwater system has been approved for the management of stormwater
runoff as described in Section 1.7 on page 3 of this permit. The stormwater
control has been designed to handle the runoff from 366,545 square feet of
impervious area.
The tract will be limited to the amount of built -upon area as indicated in Section
1.7 of this permit, and per the application documents and as shown on the
approved plans.
All stormwater collection and treatment systems must be located in either
dedicated common areas or recorded easements. The final plats for the project
will be recorded showing all such required easements, in accordance with the
approved plans.
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. SW7080320 Modification
The built -upon areas associated with the drainage areas 3, 5, 6, 7, shall be
located at least 50 feet landward of all perennial and intermittent surface waters.
The following design criteria have been provided in the bioretention basin and
must be maintained at design condition:
BASIN #1
BASIN #2
a.
Drainage Area, sf:
146,725
129,643
b.
Total Impervious Surfaces, ft2:
85,646
72,706
C.
Design Storm, inches:
1.0
1.0
d.
Max. Ponded Depth, feet:
0.75
0.75
e.
Seasonal High Water Table, fmsl:
9.5
9.5
f.
Planting Media Depth, feet:
3.0
3.0
g.
Basin Dimensions, feet:
138'x69'
126'x64'
h.
Bottom Elevation, fmsl:
13.25
19.0
i.
Bottom Surface Area, ft2:
9,340
8,000
j.
Permitted Storage Volume, ft3:
7,035
5,993
k.
Bypass / Storage Elevation, fmsl:
17.0
23.0 .
n.
Drawdown Time, hours:
12
12
o.
Underdrain Diameter, inches:
4
4
P.
Receiving Stream/River Basin:
Black Walnut Swamp / Chowan
q.
Stream Index Number:
25-25
r.
Classification of Water Body:
"C; NSW"
BASIN #3
BASIN #4
a.
Drainage Area, sf:
75,121
2,391
b.
Total Impervious Surfaces, ft2:
33,179
9,306
C.
Design Storm, inches:
1.5
1.0
d.
Max. Ponded Depth, feet:
1.0
0.75
e.
Seasonal High Water Table, fmsl:
8.17
9.5
f.
Planting Media Deptf , feet:
2.0
5.0
g.
Basin Dimensions, ft :
4,627
48'x24'
h.
Bottom Elevation, fmsl:
19.0
17.0
i.
Bottom Surface Area, ft2:
3,813
1,150
j.
Permitted Storage Volume, ft3:
4,220
833
k.
Bypass / Storage Elevation, fmsl:
20.0
23.0
n.
Drawdown Time, hours:
48
12
o.
Underdrain Diameter, inches:
4
4
P.
Receiving Stream/River Basin:
Black Walnut Swamp / Chowan
q.
Stream Index Number:
25-25
r.
Classification of Water Body:
"C; NSW"
BASIN #5
BASIN #6
a.
Drainage Area, sf:
15,503
75,41
b.
Total Impervious Surfaces, ft2:
5,734
25,537
C.
Design Storm, inches:
1.5
1.5
d.
Max. Ponded Depth, feet:
1.0
1.0
e.
Seasonal High Water Table, fmsl:
8.17
8.17
f.
Planting Media Dept!), feet:
3.0
3.0
g.
Basin Dimensions, ft :
938
3,713
h.
Bottom Elevation, fmsl:
26.0
24.0
i.
Bottom Surface Area, ft2:
589
3,023
j.
Permitted Storage Volume, ft3:
764
3,368
k.
Bypass / Storage Elevation, fmsl:
27.0
25.0
n.
Drawdown Time, hours:
48
48
o.
Underdrain Diameter, inches:
4
4
P.
Receiving Stream/River Basin:
Black Walnut Swamp / Chowan
Page 3 of 8

State Stormwater Management Systems
Permit No. SW7080320 Modification
q.. Stream Index Number:
r. Classification of Water Body:
a. Drainage Area, sf:
b. Total Impervious Surfaces, ftZ:
C. Design Storm, inches:
d. Max. Ponded Depth, feet:
e. Seasonal High Water Table, fmsl:
f. Planting Media Depth, feet:
g. Basin Dimensions, ft :
h. Bottom Elevation, fmsl:
i. Bottom Surface Area, ft2:
j. Permitted Storage Volume, ft3:
k. Bypass / Storage Elevation, fmsl:
n. Drawdown Time, hours:
o. Underdrain Diameter, inches:
P. Receiving Stream/River Basin:
q. Stream Index Number:
r. Classification of Water Body:
II. SCHEDULE OF COMPLIANCE
25-25
"C: NSW"
BASS 7
34,437
1.5
1.0
8.17
2.0
5,092
21.0
4,160
4,626
22.0
48
4
Black Walnut Swamp / Chowan
25-25
"C; NSW"
1. The stormwater management system shall be constructed in its entirety,
vegetated and operational for its intended use prior to the construction of any
built -upon surface.
2. During construction, erosion shall be kept to a minimum and any eroded areas of
the system will be repaired immediately.
3. The permittee shall at all time 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. Mowin.9 and re -vegetation of slopes and the filter strip.
d. Immediate repair of eroded areas.
e. Maintenance of all slopes in accordance with approved plans.
f. Debris removal and unclogging of all drainage structures, level spreader,
filter media, planting media, underdrains, catch basins and piping.
g. Access to the basin and outlet structure must be available at all times.
4. Records of maintenance activities must be kept for each permitted BMP. The
reports will indicate the date, activity, name of person performing the work and
what actions were taken.
5. The permittee shall submit to the Division of Water Quality an annual summary
report of the maintenance and inspection records for each BMP. The report
shall summarize the inspection dates, results of the inspections, and the
maintenance work performed at each inspection.
6. The facilities shall be constructed as shown on the approved plans. This permit
shall become void unless the facilities are constructed in accordance with the
conditions of this permit, the approved plans and specifications, and other
supporting data.
Page 4 of 8

State Stormwater Management Systems
Permit No. SW7080320 Modification
7. 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.
8. 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.
9. Access to the stormwater facilities shall be maintained via appropriate recorded
easements at all times.
10. The permittee shall submit to the Director and shall have received approval for
revised plans, specifications, and calculations prior to construction, for any
modification to the approved plans, including, but not limited to, those listed
below:
a. Any revision to any item shown on the approved plans, including the
stormwater management measures, built -upon area, details, etc.
b. Project name change.
C. Transfer of ownership.
d. Redesign or addition to the approved amount of built -upon area or to the
drainage area.
e. Further subdivision, acquisition, lease or sale of all or part of the project
area. The project area is defined as all property owned by the permittee,
for which Sedimentation and Erosion Control Plan approval or a CAMA
Major permit was sought.
f. Filling in, altering, or piping of any vegetative conveyance shown on the
approved plan.
11. The permittee shall submit final site layout and grading plans for any permitted
future areas shown on the approved plans, prior to construction.
12. A copy of the approved plans and specifications shall be maintained on file by
the Permittee for a minimum of ten years from the date of the completion of
construction.
13. The Director may notify the permittee when the permitted site does not meet one
or more of the minimum requirements 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 completed Name/Ownership Change form signed by both parties, to the
Division of Water Quality, accompanied by the supporting documentation as
listed on page 2 of the form. The approval of this request will be considered on
its merits and may or may not be approved.
The permittee is responsible for compliance with all permit conditions until such
time as the Division approves a request to transfer the permit.
3. Failure to abide by the conditions and limitations contained in this permit may
Page 5 of 8

State Stormwater Management Systems
Permit No. SW7080320 Modification
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.
4. The issuance of this permit does not preclude the Permittee from complying with
any and all statutes, rules, regulations, or ordinances, which may be imposed by
other government agencies (local, state, and federal) having jurisdiction.
5. In the event that the facilities fail to perform satisfactorily, including the creation
of nuisance conditions, the Permittee shall take immediate corrective action,
including those as may be required by this Division, such as the construction of
additional or replacement stormwater management systems.
6. The permittee grants DENR Staff permission to enter the property during normal
business hours for the purpose of inspecting all components of the permitted
stormwater management facility.
7. The permit issued shall continue in force and effect until revoked or terminated.
The permit may be modified, revoked and reissued or terminated for cause. The
filing of a request for a permit modification, revocation and re -issuance or
termination does not stay any permit condition.
8. 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.
9. Approved plans and specifications for this project are incorporated by reference
and are enforceable parts of the permit.
10. The issuance of this permit does not prohibit the Director from reopening and
modifying the permit, revoking and reissuing the permit, or terminating the permit
as allowed by the laws, rules and regulations contained in Session Law 2008-
211, Title 15A NCAC 2H.1000, and NCGS 143-215.1 et.al.
11. The permittee shall notify the Division in writing of any name, ownership or
mailing address changes at least 30 days prior to making such changes.
Permit issued this the 21 st day of January, 2010.
NOFTH CAROLINA ENVIRONMENTAL MANAGEMENT COMMISSION
L
14f Coleen H. Sullins, Director
Division of Water Quality
By Authority of the Environmental Management Commission
Page 6 of 8

State Stormwater Management Systems
Permit No. SW7080320 Modification
Innsbrook Clubhouse Villas and Amenity Center Modification
Stormwater Permit No. SW7080320 Modification
Bertie 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 Name)
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. SW7080320 Modification
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 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, per the vegetation plan.
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
Bertie County Building Inspections

V'>_9_o
VA
Fee Paid
Permit Number
a5oa M,_0vCoa
o b3 c�
Applicabl�Ipl�s 2�Coastal SW -1995 B coastal 5 - 2008 ❑ Ph II -Post Construction
(select all a app y) Non -Coastal SW- HQW/ORW Waters ❑ Universal Stormwater Management Plan
tQL0ther WQ M mt Plan:
State of North Carolina
Department of Environment and Natural Resources
Division of Water Quality
STORMWATER MANAGEMENT PERMIT APPLICATION FORM
'Mis form may be photocopied for use as an original
I. GENERAL INFORMATION
1. Project Name (subdivision, facility, or establishment name -should be consistent with project name on plans,
specifications, letters, operation and maintenance agreements, etc.):
Innsbrook Clubhouse Villas and Amenity Center
2. Location of Project (street address):
S.R. 1502, Avoca Farm Road
City:Merry Hill County:Bertie Zip:27957
3. Directions to project (from nearest major intersection):
US "17N from Windsor (102 miles), right on SR 45 at Midwav (1.6 miles), left on Avoca Farm Road (4.1 miles)
4. Latitude:36° 00' 01" N Longitude:76° 41' 43" W of the main entrance to the project.
II. PERMIT INFORMATION
1. a. Specify whether project is (check one): ❑New ®Modification
b.If this application is being submitted as the result of a modification to an existing permit, list the existing
permit numberSW7080320 , its issue date (if known)April 4, 2008 , and the status of
construction: ❑Not Started ®Partially Completed* ❑ Completed* *provide a designer's certification
2. Specify the type of project (check one):
❑Low Density ®High Density ❑Drains to an Offsite Stonnwater System ❑Other
3. If this application is being submitted as the result of a previously returned application or a letter from DWQ
requesting a state stormwater management permit application, list the stormwater project number, if
assigned, and the previous name of the project, if different than currently
proposed,
4. a. Additional Project Requirements (check applicable blanks; information on required state permits can be
obtained by contacting the Customer Service Center at 1-877-623-6748):
❑CAMA Major
❑NPDES Industrial Stormwater
®Sedimentation/Erosion Control: 5.88 ac of Disturbed Area
❑404/401 Permit: Proposed Impacts
b.If any of these permits have already beeniacquired please provide the Project Name, Project/Permit Number,
issue date and the type of each permit:
0
Form SWU-101 Version 07July2009 Page I of 6

III. CONTACT INFORMATION
1. a. Print Applicant / Signing Official's name and title (specifically the developer, property owner, lessee,
designated government official, individual, etc. who owns the project):
Applicant/Organization:Innsbrook Golf and Marina, LLC
Signing Official & Title:Mike Collins, Chief Executive Officer
b.Contact information for person listed in item 1a above:
Street Address:55 Beattie Place, Suite 100
City:Greenville State:SC Zip:29601
Mailing Address (if applicable):
Phone: (864 ) 233-6070 Fax: (864 ) 233-3099
Email:mcollins©imiliving.com
c. Please check the appropriate box. The applicant listed above is:
❑ The property owner (Skip to Contact Information, item 3a)
❑ Lessee* (Attach a copy of the lease agreement and complete Contact Information, item 2a and 2b below)
❑ Purchaser* (Attach a copy of the pending sales agreement and complete Contact Information, item 2a and
2b below)
® Developer* (Complete Contact Information, item 2a and 2b below.)
2. a. Print Property Owner's name and title below, if you are the lessee, purchaser or developer. (This is the
person who owns the property that the project is located on):
Property Owner/ Organ ization:Innsbrook Golf and Marina, LLC
Signing Official & Title:Mike Collins
b.Contact information for person listed in item 2a above:
Street Address:934 Sutton Road
City:Merry Hill State: NC Zip:27957
Mailing Address (if applicable):
City: State: Zip:
Phone: (252 ) 473-1450 Fax: (864 ) 233-3099
3. a. (Optional) Print the name and title of another contact such as the project's construction supervisor or other
person who can answer questions about the project:
Other Contact Person/
Signing Official & Title
b.Contact information for person listed in item 3a above:
Mailing Address:
Phone:
Em
4. Local jurisdiction for building permits:
State:
Fax: ( 1
Point of
Phone H:
Form SWU-101 Version 07July2009 Page 2 of 6

IV. PROJECT INFORMATION
1. In the space provided below, briefly summarize how the stormwater runoff will be treated.
Stormwater from the project will be handled using 4 bioretention cells. The modification to the existing permit
will be a revision to all 4 bioretention cells.
2. a. If claiming vested rights, identify the supporting documents provided and the date they were approved:
❑ Approval of a Site Specific Development Plan or PUD Approval Date:
❑ Valid Building Permit Issued Date:
❑ Other: Date:
b.ldentify the regulation(s) the project has been designed in accordance with:
® Coastal SW -1995 ❑ Ph II - Post Construction
3. Stormwater runoff from this project drains to the Chowan River basin.
4. Total Property Area: 6.54 acres
5. Total Coastal Wetlands Area: acres
6. Total Surface Water Area: acres
7. Total Property Area (4) -Total Coastal Wetlands Area (5) - Total Surface Water Area (6) : Total Project
Aree:6.54 acres
Total project area shall be calculated to exclude the following the normal pool of inwounded structures, the area
between the batiks of streams and rivers, the area below the Nornal High Water (NM line or Mean High Water
(MHW) line, mud coastal wetlands lmtdward from the NHW (or MHW) line. The resultant project area is used to
calculate overall percent built upon area (BUA). Non -coastal wetlands lmutzoard of tlue NHW (or MHW) litie nay
be included in the total project area.
8. Project percent of impervious area: (Total Impervious Area / Total Project Area) X 100 = 34.71 %
9. How many drainage areas does the project have?4 (For high density, count 1 for each proposed engineered
stormwater BMP. For low density and other projects, use 1 for the whole property area)
10. Complete the following information for each drainage area identified in Project Information item 9. If there
are more than four 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'3_
'Drainage Area 5
Drainage Area 6
Drainage Area 7
Receiving Stream Name
Black Walnut
Swamp ✓
Black Walnut
Swamp ✓
Black Walnut
Swamp
Black Walnut
Swam
Stream Class
QNSW t/
QNSW v
QNSW
QNSW t
Stream Index Number *
25-25
25-25 v
25-25
25-25 ✓
Total Drainage Area (so
75121
15503
75412
103261
On -site Drainage Area (so
75121
15503
75412
103261
Off -site Drainage Area (so
0
0
0
0
Proposed Impervious Area** (so
33179
5734
25537
34437
% Impervious Area** total
44.2
37.0
33.9
33.3
Impervious- Surface Area
Drainage Area
Drainage Area -'
Drainage Area
Drainage Area
On -site Buildings/Lots (so
10365
3233
13090
22538
On -site Streets (so
18490
4474
11019
On -site Parking (so
1414
On -site Sidewalks (so
2516
828
7506
880
Other on -site (so
394
1673
467
Future (so
Off -site (so
Existing BUA*** (so
Total (so:
33179 V
5734
25537
34437
* Strewn Class and Index Number can be determined at: http://Ju2o.enr.state.ne.us/biuus/reports/reportsWB.litnd
Form S WU-101 Version 07July2009 Page 3 of 6

impervious area is defined as the built upon area including, but not limited to, buildings, roads, parking areas,
sidewalks, gravel areas, etc.
Report only that amount of existing BUA that will remain after development. Do not report any existing BUA that
is to be removed and which will be replaced by nero BUA.
11. How was the off -site impervious area listed above determined? Provide documentation.
Proiects in Union County: Contact DIVQ Central Office staff to check if the project is located within a Threatened &
Endangered Species watershed that nury be subject to more stringent stornnvate' requirements as per NCAC 02B .0600.
V. SUPPLEMENT AND O&M FORMS
The applicable state stormwater management permit supplement and operation and maintenance (O&M) forms
must be submitted for each BMP specified for this project. The latest versions of the forms can be downloaded
from http://h2o.enr.state.nc.us/su/bmp forms.htm.
VL 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. A detailed application instruction sheet and BMP
checklists are available from http://h2o.enr.state.nc.Us/su/bmp_forms.htm. The complete application
package should be submitted to the appropriate DWQ Office. (The appropriate office may be found by locating
project on the interactive online map at http://li2o.etir.state.nc.us/su/msi maps.htm.)
Please indicate that the following required information have been provided by initialing in the space provided for
each item. All original documents MUST be signed and initialed in blue ink. Download the latest versions for
each submitted application package from http://h2o.enr.state.nc.us/su/bnnp forms.htm.
Initials
1. Original and one copy of the Stormwater Management Permit Application Form. TF..J
2. Original and one copy of the signed and notarized Deed Restrictions & Protective Covenants "+ A•J
Form. (if required as per Part V11 below)
3. Original of the applicable Supplement Form(s) (sealed, signed and dated) and O&M t FvJ
agreement(s) for each BMP.
4. Permit application processing fee of $505 payable to NCDENR. (For an Express review, refer to
http://www.envhelp.ori,/piges/onestopexpress.htmI for information on the Express program
and the associated fees. Contact the appropriate regional office Express Permit Coordinator for
additional information and to schedule the required application meeting.)
5. A detailed narrative (one to two pages) describing the stormwater treatment/ managementfor
the project. This is required in addition to the brief summary provided in the Project
Information, item 1.
6. A USGS map identifying the site location. If the receiving stream is reported as class SA or the
receiving stream drains to class SA waters within 1/2 mile of the site boundary, include the 1/2
mile radius on the map.
7. Sealed, signed and dated calculations.
8. Two sets of plans folded to 8.5" x 14" (sealed, signed, & dated), including:
a. Development/Project name.
b. Engineer and firm.
c. Location map with named streets and NCSR numbers.
d. Legend.
e. North arrow.
f. Scale.
g. Revision number and dates.
h. Identify all surface waters on the plans by delineating the normal pool elevation of
impounded structures, the banks of streams and rivers, the MHW or NHW line of tidal
waters, and any coastal wetlands landward of the MHW or NI-IW lines.
• Delineate the vegetated buffer landward from the normal pool elevation of impounded
structures, the banks of streams or rivers, and the MHW (or NHW) of tidal waters.
i. Dimensioned property/project boundary with bearings & distances.
j. Site Layout with all BUA identified and dimensioned.
k. Existing contours, proposed contours, spot elevations, finished floor elevations.
1. Details of roads, drainage features, collection systems, and stormwater control measures.
'TF sJ
T(-LJ
Fonn SWU-101 Version 07July2009 Page 4 of 6

in. Wetlands delineated, or a note on the plans that none exist. (Must be delineated by a
qualified person. Provide documentation of qualifications and identify the person who
made the determination on the plans.
n. Existing drainage (including off -site), drainage easements, pipe sizes, runoff calculations.
o. Drainage areas delineated (included in the main set of plans, not as a separate document).
p. Vegetated buffers (where required).
9. Copy of any applicable soils report with the associated SHWT elevations (Please identify TC^-'
elevations in addition to depths) as well as a map of the boring locations with the existing
elevations and boring logs. Include an 8.5"xll" copy of the NRCS County Soils map with the
project area clearly delineated. For projects with infiltration BMPs, the report should also
include the soil type, expected infiltration rate, and the method of determining the infiltration rate.
(Infiltration Devices submitted to WiRO: Schedule a site visit for DWQ to verily the SHWT prior
to submittal, [phone].) A copy of the most current property deed. Deed book: 'i`(1 Page No: 2�j3 o r rCa: eu sh rjkh : Ne Q
For corporations and limited liability corporations (LLC): Provide documentation from the NC
Secretary of State or other official documentation, which supports the titles and positions held
by the persons listed in Contact Information, item 1a, 2a, and/or 3a per NCAC 2F[.1003(e). The
corporation or LLC must be listed as an active corporation in good standing with the NC
Secretary of State, otherwise the application will be returned.
http://www.secretary.state.iic.us/Corporations/CSearch.aspx
VIL DEED RESTRICTIONS AND PROTECTIVE COVENANTS
For all subdivisions, outparcels, and future development, the appropriate property restrictions and protective
covenants are required to be recorded prior to the sale of any lot. If lot sizes vary significantly or the proposed
BUA allocations vary, a table listing each lot number, lot size, and the allowable built -upon area must be provided
as an attachment to the completed and notarized deed restriction form. The appropriate deed restrictions and
protective covenants forms can be downloaded from
http://h2o.enr.state.nc.us/su/bml2 forms.htm#deed restrictions. Download the latest versions for each submittal.
In the instances where the applicant is different than the property owner, it is the responsibility of the property
owner to sign the deed restrictions and protective covenants form while the applicant is responsible for ensuring
that the deed restrictions are recorded.
By the notarized signature(s) below, the permit holder(s) certify that the recorded property restrictions and
protective covenants for this project, if required, shall include all the items required in the permit and listed
on the forms available on the website, 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 NC DWQ and that they will be recorded prior to the sale of any lot.
VIII. CONSULTANT INFORMATION AND AUTHORIZATION
Applicant: Complete this section if you wish to designate authority to another individual and/or firm (such as a
consulting engineer and/or firm) so that they may provide information on your behalf for this project (such as
addressing requests for additional information).
Consulting Engineer.Thomas K. Goodwin, P.E.
Consulting Firm: Hobbs, Upchurch & Associates, P.A.
Mailing Address:P.O. Box 1737
City:Southern Pines State:NC Zip:28387
Phone: (910 ) 692-5616
EmaiCtgoodwin©hobbsupchurch.com
Fax: (910 ) 692-7342
IX. PROPERTY OWNER AUTHORIZATION (if Contact Information, item 2 has been filled ont, complete this
section)
I, (print or type name of person listed in Contact Information, item 2a) , certify that I
own the property identified in this permit application, and thus give permission to (print or type name of person
listed in Contact Information, item la) with (print or type name of organization listed in
Contact Information, itenn lb) to develop the project as currently proposed. A copy of
the lease agreement or pending property sales contract has been provided with the submittal, which indicates the
party responsible for the operation and maintenance of the stormwater system.
Form SWU-101 Version 07July2009 Page 5 of 6

As the legal property owner I acknowledge, understand, and agree by my signature below, that if my designated
agent (entity listed in Contact Information, item 1) dissolves their company and/or cancels or defaults on their
lease agreement, or pending sale, responsibility for compliance with the DWQ Stormwater permit reverts back to
me, the property owner. As the property owner, it is my responsibility to notify DWQ immediately and submit a
completed Name/Ownership Change Form within 30 days; otherwise I will be operating a stormwater treatment
facility without a valid permit. I understand that the operation of a stormwater treatment facility without a valid
permit is a violation of NC General Statue 143-215.1 and may result in appropriate enforcement action including
the assessmenj ofc ivil penalties of up to $25,000 per day, pursuant to NCGS 143-215.6.
I, aL-WW (7_ LN1oM a Notary Public for the State of m ( _ County of
do hereby certify that T W , r LciY /n)G personally appeared
before me this
,,�Aday of � MIA Xfo, and acknowledge the due execution of the application for
a stormwater permit. Witness my hand and official seal, t
SEAL
My commission expires '?� (
X. APPLICANT'S CERTIFICATION
1, (print or type name of person listed in Contact Information, item 2)
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 the
applicable storm ate rules under A NCAC 2H .1000, SL 2006-246 (Ph. II - P6st Constructi�otn) 6r SL 2008-211.
Signature: Date:— 05 j1
I, a Notary Public for the State of Al, C County of
rdo hereby certify that f—EW personally appeared
before me this_�Wday of WA %e=K �� and acknthe execution of the application for
a stormwater permit. Witness my hand and official seal,
SEAL
My commission expires
Form SWU-101 Version 07July2009 Page 6 of 6

STORMWATER SUBMITTAL REQUIREMENTS
���IWET=DETENTION=PONDS
Objective
A. Collect all runoff from all BUA (proposed and/or existing and/or offsite) as the case may be,
by any means including piping or swales, and direct it to the pond.
B. Check the proposed pond design to make sure it meets or exceeds the minimum design
criteria for surface area, volume and drawdown.
11. What makes up a complete wet detention pond application package?
A. Two sets of sealed, signed & dated layout & grading plans with appropriate details.
(Additional sets of plans may be requested for projects in certain counties)
B. Completed application with supplement(s), SWU-101, SW401-Wet Pond, and inspection and
maintenance agreements.
C. Deed restriction document, if applicable (for subdivisions & projects with out parcels)
D. Sealed, signed & dated calculations.
E. Estimated seasonal high water table elevation at all pond locations.
F. Chlorides test results must be provided if the project is within''/z mile of SR waters (Phase II).
(This is only required to test out of SR water treatment requirements) )IIII110
III. BIMS entry (for DWQ use only)
Enter & track application acknowledged date, review date, add info requested/received dates, permit
issue dates, and drainage area info. Best done after the add info letter is written and before sending
permit up for signature.
IV. Shell documents (for DWQ use only)
Permit shells: s:\wqs\stormwater\shells\highcompond
s:\wqs\stormwater\shells\highsubpond
s:\wqs\stormwater\shells\HDhybrid
Spreadsheet: s:\wqs\stormwater\excel spreadsheets\pond
VI. Review Procedure
A. APPLICATION
1. V An original signature is required. Photocopied signatures cannot be accepted.
2.✓A completed wet detention pond supplement and a signed, dated and notarized wet
✓ detention pond Inspection and Maintenance Agreement with an original signature.
3. , The numbers on the supplement match up to the numbers used in the calculations and
✓ shown on the plan details.
4. /Built -upon areas are reported in square feet in Section 111.6.
5. Receiving stream name and classification. This is important because in the non -Phase
II counties, a wet pond cannot be used on a project that is within'/ mile of and draining
to SA waters. For Phase II, a wet pond is allowed within 1/2mile of SA waters.
6. Section 111.6 is filled in -cannot be left blank. One column must be filled in for each
proposed wet pond.
7. y If the applicant is a corporation, partnership or LLC, look it up on the Secretary of State
Corporations Database. Make sure corporation is spelled correctly (capitalization and
punctuation matter) and that the person signing the application is at least a vice-
president in the corporation, a General Partner in the partnership, a member in a
member -managed LLC, or the manager of a manager -managed LLC. Need
documentation to support if the Articles of Incorporation do not list the members or
managers of the LLC. If an agent signs, then a letter of authorization is needed from the
8,//president, vice president, general partner, member or manager.
rl For subdivided projects, a signed and not
deed restriction statement must be
provided.

Wef.Detention Pond, cont.
B. CALCULATIONS
1.
The orifice is sized based on drawing down the calculated minimum volume in 2-5
days. The average head to use in the orifice equation is approximately one-third of
the distance between the permanent pool elevation (PPE) and the elevation of the
next available outlet above the permanent pool. The elevation of the next available
outlet must be either the elevation where the minimum volume is provided, or it can
be higher. The temporary pool elevation (TPE) to report on the supplement will be
the elevation of the next available outlet above the PPE. The temporary pool volume
(TPV) to report on the supplement is the volume between the specified PPE and the
TPE.
2.
For Phase II projects that are within'/2 mile of and draining to SR waters, the
difference in runoff from the predevelopment and post -development conditions for
the 1 year 24 hour storm must be controlled and treated.
3.
For Phase II projects, the discharge rate leaving the pond can be no more than the
pre -development discharge rate for the 1 year 24 hour storm.
4.
For Phase II projects draining to SA water, no discharge to surface waters may occur
from wet ponds. The discharge leaving the orifice must be effectively infiltrated prior to
+.�
reaching surface waters.
5.
The average pond depth is the permanent pool volume divided by the permanent pool
surface area. The result must be between 3 ft. and 7.5 ft. Parts of the pond can be
deeper than 7.5 ft., but in no case can any part of the pond be less than 3 ft deep.
6.
If the 85% TSS chart is used a 30' vegetated filter must be provided at the outlet of the
pond. If the 90% TSS chart is used, no filter is required.
7.
Use the correct SA/DA TSS chart from the BMP Manual noting that there are different
charts for different areas of the State.
8.
Required surface area at permanent pool.
9.
Provided surface area at permanent pool (Based on pond dimensions)
10.
Required volume calculation based on 1.5" storm for Phase II projects* and 1" storm for
all others projects. *unless the project is Phase 11 and within ''/z mile of and draining to
SR waters then the volume calculation must be based on difference between the pre
and post development conditions for the 1-yr 24-hr storm.
11.
Table of elevations, areas, incremental volumes and accumulated volumes for overall
pond and for forebay, to verify volumes provided.
12.
Forebay designed to hold 20% of the permanent pool volume. (Range of 18%-22%
OK.)
13.
Non -erosive flow for 10 yr. storm in the vegetated filter, if using 85% TSS.
14.
The seasonal high water table must be at or below the proposed permanent pool
elevation to assure that the necessary volume will be available above the permanent
pool.
15.
Rounding numbers off during the calculation process can result in•deficiencies. Do not
round the numbers until you get to the final result. '
16.
An additional one foot must be excavated below the bottom elevation of the,pond. The 1
foot sediment accumulation depth is not included in the average depth calculation.

Wet Detention Pond, cont.
C. PLANS- Due to storage space constraints, plan sheets should be kept to a minimum. For
small commercial single wet pond projects, the plan set could consist of only 2 or 3 sheets,
layout, grading and details. For larger projects, show as much information as possible on as
few Sheets as possible, without cluttering them up.
I V Development/Project Name
Engineer name and firm.
3.+ Legend
4. ✓North Arrow
5. ✓ Location Map with nearest intersection of two major roads shown. Major road is any 1,
2; or 3 digit NC, US or interstate highway.
6. V/Scale- standard engineering scale, no off-the-wall stuff.
7. ✓Date
8. ✓ Revision number and date, if applicable.
9. Original contours, proposed contours, spot elevations, finished floor elevations, pipe
inverts, swale inverts, etc.
10 Existing drainage (piping, swales, ditches, ponds, etc.), including off -site. Include a map
lineating the offsite drainage areas.
11loperty/Project boundary lines, bearing & distances.
12. Mean High Water Line or Normal High Water Line, if applicable.
13"he permanent pool elevation must be above the SHWT and above the lowest
elevation of adjacent wetlands. Evaluate the need for a liner and/or berm/slurry wall to
,prevent dewatering the wetland.
14. Drainage easement widths, pipe sizes and swale inverts are provided.
15 Wetlands delineated, or a note on the plans that none exist. Get a copy of the wetlands
delineation map signed by the Corps of Engineers, or have the applicant include a copy
of the unsigned delineation map submitted to the Corps. Wet ponds may not be located
16Y/in wetlands unless a permit to fill those wetlands has been obtained.
Details for the roads, parking, cul-de-sacs, including sidewalk width, radii, dimensions &
slopes.
17V Apartment / Condo development- Provide a typical building footprint with dimensions
and note all concrete and wood deck areas.
18. he drainage area for each wet pond is clearly delineated and numbered to match up to
the.calculations and supplement. Drainage area delineation is best done as a separate
�lan sheet.
19. A pond section detail to include the forebay, a 10 foot wide vegetated shelf, pertinent
elevations for the bottom, permanent pool, temporary pool, and SHWT, 3:1 slopes
above the permanent pool, and the weir elevation between the main pond and the
veforebay.
20. /The 10 vegetated shelf extends 6" below and 6" above the permanent pool elevation.
N 21Y An outlet structure detail showing a trash rack with :56" square openings, the necessary
orifice invert elevation (i.e., the permanent pool), orifice size and temporary pool
M Ve'levation.
l 22.' /Dimensions for each line and arc formed by the permanent pool contour.
23/y Where the 85% TSS chart was used, a 30 ft. vegetated filter strip is required to be
shown on the plans & detailed (elevations, inverts, slopes, and flow spreader
✓mechanism). Please note that the filter strip is not a ditch.
24.✓A forebay is provided for each inlet and located so as to prevent short-circuiting.
25. The pond must have a minimum 1.5:1 length to width ratio and a minimum 3:1 flow path
length. Artificial "baffles" of timber, vinyl, or earth can be used to create a longer flow
path. The top elevation of the baffle should be set at the temporary pool elevation or
higher.
26. A Vegetation plan is specified for the pond, including slopes. Wetlands species are
listed for planting on the 10:1 shelf. Weeping Love Grass is not suitable as a permanent
vegetated cover for pond slopes.
27 All roof drainage must be directed to the pond. Show the roof drain collection lines on
the plan. This is necessary for projects where the buildings back up the property lines
where roof drainage may leave the site prior to going through the pond.

®��
NCDENRPRESS
Permit Number:
(to be provided by DWO)
,a01 WATFq
O' �G
y T
� r
o
STORMWATER MANAGEMENT PERMIT APPLICATION FORM
12010 401 CERTIFICATION APPLICATION FORM
pr w�
BIORETENTION CELL SUPPLEMENT
f��
u� C DENR This form must be filled out, printed and submitted.
The Required Items Checklist (Part III) must be printed, filled out and submitted along with all of the required information.
I:. PROJECTJNFORMATION'>"
Project name Innsbrook Clubhouse Villas and Amenity Center
Contact name Tom Wanko
Phone number 910-692-5616 "
Date December 9, 2009
Drainage area number DA-3 -
IL DESIGN INFORMATION i • .,., ',`t
Site Characteristics /
Drainage area 75,121 fit/V
Impervious area 33,179 ftz
Percent impervious 44.20/6
Design rainfall depth 1.5 inch
Peak Flow Calculations
Is pre/post control of the 1-yr, 24-hr peak flow required?
1-yr, 24-hr runoff depth
1-yr, 24-hr intensity
Pre -development 1-yr, 24-hr peak flow
Post -development 1-yr, 24-hr peak flow
Pre/Post 1-yr, 24-hr peak control
Storage Volume: Non -SA Waters
Minimum volume required
Volume provided
Storage Volume: SA Waters
1.5- runoff volume
Pre -development 1-yr, 24-hr runoff
Post -development 1-yr, 24-hr runoff
Minimum volume required
Volume provided
Cell Dimensions
Fording depth of water
Fording depth of water
Surface area of the top of the bioretention cell
Length:
Width:
-or- Radius
Media and Soils Summary
Drawdown time, ponded volume
Drawdown time, to 24 inches below surface
Drawdown time, total:
In -situ soil:
Soil permeability
Planting media soil.
Soil permeability
Soil composition
% Sand (by weight)
% Fines (by weight)
% Organic (by weight)
Y (Y or N)
0.46 in
5.52 in/hr
2,860 Wised
5.380 Wised
2.520 ft'/sec
4,202.0 it'
4,220.0 ft' OK
ft3
W
ft'
0 ft'
fl'
12 inches OK
1.00 It
4,627.0 ftZ OK
It
It
If
12 hr OK
36 hr OK
48 hr
0.03 in/hr Insufficient. Increase infiltration rate.
1.00 in/hr OK
85% OK
10% OK
5% OK
Total: 100%
Phosphorus Index (P-Index) of media 10 limitless) OK
Form SW401-Bioretention-Rev.8
July 30, 2009
Parts I and II. Design Summary, Page 1 of 2

Permit Number:
(to be provided by DWQ)
Basin Elevations
Temporary pool elevation
20.00 fmsl
Type of bioretention cell (answer "Y" to only one of the two
following questions):
Is this a grassed cell?
Y (Y or N)
OK
Is this a cell with trees/shrubs?
N (Y or N)
Planting elevation (top of the mulch or grass sod layer)
19 fri
Depth of mulch
4 inches
OK
Bottom of the planting media soil
17 fmsl
Planting media depth
2 it
Depth of washed sand below planting media soil
4 ft
Are underdrains being installed?
"Y (Y or N)
How many clean out pipes are being installed?
6
OK
What factor of safety is used for sizing the underdrains? (See
2
OK
BMP Manual Section 12.3.6)
Additional distance between the bottom of the planting media and
1 ft
the bottom of the cell to account for underdrains
Bottom of the cell required
12 fmsl
SHWT elevation
6.17 fmsl
Distance from bottom to SHWT
3.83 it
OK
Internal Water Storage Zone (IWS)
Does the design include IWS
N (Y or N)
Elevation of the top of the upturned elbow
fmsl
Separation of IWS and Surface
19 it
Planting Plan
Number of tree species
Number of shrub species
Number of herbaceous groundcover species
Additional Information
Does volume in excess of the design volume bypass the
Y (Y or N) OK
bioretention cell?
-
Does volume in excess of the design volume flow evenly distributed
Y (Y or N) OK
through a vegetated filsO
What is the length of the vegetated filter?
30+it
Does the design use a level spreader to evenly distribute flow? Y (Y or N) Submit a level spreader supplement.
Is the BMP located at least 30 feet from surface waters (50 feet if
SA waters)?
Is the BMP located at least 100 feet from water supply wells?
Are the vegetated side slopes equal to or less than 31?
Is the BMP located in a proposed drainage easement with access
to a public Right of Way (ROW)?
Inlet velocity (from treatment system)
Is the area surrounding the cell likely to undergo development in
the future?
Are the slopes draining to the bioretention cell greater than 20%?
Is the drainage area permanently stabilized?
Pretreatment Used
(Indicate Type Used with an'X' in the shaded cell)
Gravel and grass
(8 inches gravel followed by 3-5 it of grass)
Grassed Swale
Forebay
Other
Y (Y or N)
OK
Y (Y or N)
OK
Y- (Y or N)
OK
Y ,(Y or N)
OK
• - -. 3.76 fUsec
Insufficient inlet velocity unless energy dissipating devices are
being used.
N (Y or N) OK
N (Y or N) OK
Y (Y or N) OK
X OK
Form SW401-Biorelention-Rev.8
July 30, 2009 Pans I and It. Design Summary, Page 2 of 2

Permit No
(to be assigned by DWG)
IIC REQUIREDREMSCMECKLIST'is"'".`M . sI
Please indicate the page or plan sheet numbers where the supporting documentation can be found. An incomplete submittal package will
result in a request for addltlonal information. This will delay final review and approval of the project Initial in the space provided to
indicate the following design requirements have been met. If the applicant has designated an agent, the agent may initial below. If a
requirement has not been met, attach justification.
Page/ Plan
Initials Sheet No.
1. Plans (1' - 59 or larger) of the entire site shaving:
- Design at ultimate build -out,
- OH -site drainage (if applicable),
- Delineated drainage basins (include Rational C coefficient per basin),
- Cell dimensions,
- Pretreatment system,
- High flow bypass system,
Maintenance access,
- Recorded drainage easement and public right ofway (ROW),
- Clean out pipe locations,
- Overflow device, and
- Boundaries of drainage easement.
T ( tj C - S 2. Plan details (1' = 30' or larger) for the bioretention cell showing:
- Cell dimensions
- Pretreatment system,
- Hgh flow bypass system,
- Maintenance access,
- Recorded drainage easement and public right of way (ROW),
- Design at ultimate build -out,
- Off -site drainage (if applicable),
- Clean out pipe locations,
- Overflow device, and
- Boundaries of drainage easement.
- Indicate the P-Index between 10 and 30
C - 11 3. Section view of the bioretention cell (1' = 20' or larger) showing:
- Side slopes, 3:1 or laver
- Underdrain system (if applicable), and
- Bioretention cell layers (ground level and slope, pre-treatment, ponding depth, mulch depth, fill media
depth, washed sand, filter fabric (or choking stone if applicable), #57 stone, underdrains (if applicable),
SHWT level(s), and overflow structure)
TF� Gli'EaC�.Ave^. A soils report that is based upon an actual field investigation, soil borings, and infiltration tests. The
results of the soils report must be verified in the field by DWO, by completing 8 submitting the soils
investigation request form. County soil maps are not an acceptable source of soils information. All
elevations shall be in feet mean sea level (fmsl). Results of soils tests of both the planting soil and the in
situ soil must include:
- Sal permeability,
- Soil composition (% sand, % fines, % organic), and
P-index.
T �--- 5. A detailed planting plan (i' = 20' or larger) prepared by a qualified individual showing:
- A variety of suitable species,
- Sizes, spacing and locations of plantings,
- Total quantity of each type of plant specified,
- A planting detail,
- The source nursery for the plants, and
- Fertilizer and watering requirements to establish vegetation.
_14:�W A4achNAl.tt 6. An assurance that the installed system will meet design specifications upon initial operation once the
project is complete and the entire drainage area is stabilized.
T C - 10 7. A construction sequence that shows how the bioretention cell •will be protected from sediment until the
entire drainage area is stabilized.
1L� n �dL.IA^ ,11 8. The supporting calculations (including underdrain calculations, if applicable).
T�i nh*"ilra" LLAzl f'f.g A copy of the signed and notarized inspection and maintenance (AM) agreement.
'r F w m_z f �� _ 11%110. A copy of the deed restriction.
Form SW401.Bio(etoMion-Rev7 Part III. Page 1 of t

Bioretention Area Supporting Calculations
Area - DA-3
Peak Inflow Calculations
Drainage Are&A ,T 1
75,121 SF
1.72 Acres
Underdrain.Formula'

Bioretention Area Supporting Calculations
Area - DA-3
Intensity Calculations
Finding'The 1 rStorrn�'
6.25
inches
byreadin ,tt=ar,,
!
Time of Concentration Calculations
Hydraulic Length (ft.), L. 1 .1, 1 1
475
feet
Change, in Elevation'(ft.), H --
13
feet
Tirn eof'C o"nc'!.,. T' j
5.00
minutes
10yr Peak Intensity Calculations
Finding Th e ctJ
0.68
inches
t9yr,'P'T
b,r n atached char
--ii
d(in)/tc(min )*60(min/hr) ,
8.16
nches/hour
lyr Peak Intensity Calculations
Finding ;The I yr, @ Tc � � r�V
0.46
inches
by readi6 attached chart -c-, L
d(in)/tc(min )*160(min/fir )'� ... . .... 1
5.52
inches/hour

Permit Number:
(to be provided by DWQ)
Drainage Area Number:
Bioretention Operation and Maintenance Agreement
I will keep a maintenance record on this BMP. This maintenance record will be kept in a
log in a known set location. Any deficient BMP elements noted in the inspection will be
corrected, repaired or replaced immediately. These deficiencies can affect the integrity
of structures, safety of the public, and the removal efficiency of the BMP.
Important operation and maintenance procedures:
— Immediately after the bioretention cell is established, the plants will be watered
twice weekly if needed until the plants become established (commonly six
weeks).
— Snow, mulch or any other material will NEVER be piled on the surface of the
bioretention cell.
— Heavy equipment will NEVER be driven over the bioretention cell.
— Special care will be taken to prevent sediment from entering the bioretention cell.
— Once a year, a soil test of the soil media will be conducted.
After the bioretention cell is established, I will inspect it once a month and within 24
hours after every storm event greater than 1.0 inches (or 1.5 inches if in a Coastal
County). Records of operation and maintenance will be kept in a known set location
and will be available upon request.
Inspection activities shall be performed as follows. Any problems that are found shall
be repaired immediately.
BMP element:
Potentialproblems:
How 1 will remediate theproblem:
The entire BMP
Trash/debris is present.
Remove the trash/debris.
The perimeter of the
Areas of bare soil and/or
Regrade the soil if necessary to
bioretention cell
erosive gullies have formed.
remove the gully, and then plant a
ground cover and water until it is
established. Provide time and a
one-time fertilizer application.
The inlet device: pipe,
The pipe is clogged (if
Unclog the pipe. Dispose of the
stone verge or swale
applicable).
sediment off -site.
The pipe is cracked or
Replace the pipe.
otherwise damaged (if
applicable).
Erosion is occurring in the
Regrade the swale if necessary to
Swale (if applicable).
smooth it over and provide erosion
control devices such as reinforced
turf matting or riprap to avoid
future problems with erosion.
Stone verge is clogged or
Remove sediment and clogged
covered in sediment (if
stone and replace with clean stone.
applicable).
Form SW401-Bioretention O&M-Rev.3 Page 1 of 4

BMP element:
Potentialproblems:
How t will remediate theproblem:
The pretreatment area
Flow is bypassing
Regrade if necessary to route all
pretreatment area and/or
flow to the pretreatment area.
ullies have formed.
Restabilize the area after grading.
Sediment has accumulated to
Search for the source of the
a depth greater than three
sediment and remedy the problem if
inches.
possible. Remove the sediment and
restabilize the pretreatment area.
Erosion has occurred.
Provide additional erosion
protection such as reinforced turf
matting or riprap if needed to
prevent future erosion problems.
Weeds are present.
Remove the weeds, preferably by
hand.
The bioretention cell:
Best professional practices
Prune according to best professional
vegetation
show that pruning is needed
practices.
to maintain optimal plant
health.
Plants are dead, diseased or
Determine the source of the
dying.
problem: soils, hydrology, disease,
etc. Remedy the problem and
replace plants. Provide a one-time
fertilizer application to establish the
ground cover if a soil test indicates
it is necessary.
Tree stakes/wires are present
Remove tree stake/wires (which
six months after planting.
can kill the tree if not removed).
The bioretention cell:
Mulch is breaking down or
Spot mulch if there are only random
soils and mulch
has Floated away.
void areas. Replace whole mulch
layer if necessary. Remove the
remaining much and replace with
triple shredded hard wood mulch at
a maximum depth of three inches.
Soils and/or mulch are
Determine the extent of the clogging
clogged with sediment.
- remove and replace either just the
top layers or the entire media as
needed. Dispose of the spoil in an
appropriate off -site location. Use
triple shredded hard wood mulch at
a maximum depth of three inches.
Search for the source of the
sediment and remedy the problem if
possible.
An annual soil test shows that
Dolomitic lime shall be applied as
pH has dropped or heavy
recommended per the soil test and
metals have accumulated in
toxic soils shall be removed,
the soil media.
disposed of properly and replaced
with new planting media.
Form SW401-Bioretention O&M-Rev.3 Page 2 of 4

BMP element:
Potentialproblems:
How I will remediate theproblem:
The underdrain system
Clogging has occurred.
Wash out the underdrain system.
if applicable)
The drop inlet
Clogging has occurred.
Clean out the drop inlet. Dispose of
the sediment off -site.
The drop inlet is damaged
Repair or replace the drop inlet.
The receiving water
Erosion or other signs of
Contact the NC Division of Water
damage have occurred at the
Quality 401 Oversight Unit at 919-
outlet.
733-1786.
Form SW401-Bioretention O&M-Rev.3 Page 3 of 4

Permit
X
(to be provided by DWQ)
I acknowledge and agree by my signature below that I am responsible for the
performance of the 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.
Project nanie:lnnsbrook Clubhouse Villas
BMP drainage area number: DA 3
Print name:Mike Collins
Title:Chief Executive Officer
Address: SS 6 Vr4k, e kac� t 5L�A-c k 6U
Note: The legally responsible parry 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, StAsanne G A I ndey- , a Notary Public for the State of
SbtA Calm t na, , County of corewyi Ile , do hereby certify that
s A\n M CO I 1✓)% personally appeared before me this SO
day of LeCejffi �� aCCpl , and acknowledge the due execution of the
forgoing bioretention maintenance requirements. Witness my hand and official seal,
My commission expires
Form SW401-Bioretention I&M-Rev. 2
Page 4 of 4

Permit Number:
(to be provided by DWD/
®G'A ��'ppF�W ArFq, y
NC EXPRESS
�X��S�
5�\r►
JAN 1 I ZO1Q STORMWATER MANAGEMENT PERMIT APPLICATION FORM
401 CERTIFICATION APPLICATION FORM
NC ®E9NR BIORETENTION CELL SUPPLEMENT
This form must be filled out, printed and submitted.
The Required Items Checklist (Part III) must be printed, filled out and submitted along with all of the required information.
f•roleci name
Contact name
Phone number
Date
Drainage area number
910.692-5616
December 7, 2009
II. DESIGN INFORMATION
Site Characteristics
Drainage area
"" 15,503If ✓
Impervious area
5,734 ft' ✓
V/
Percent impervious
37.0% %
Design rainfall depth
1.5 inch ✓
Peak Flow Calculations
Is pre/post control of the 1-yr, 24-hr peak flow required?
1-yr, 24-hr runoff depth
1-yr, 24-hr intensity
Pre -development 1-yr, 24-hr peak flow
Post -development 1-yr, 24-hr peak Flow
Pre/Post 1-yr, 24-hr peak control
Storage Volume: Non -SA Waters
Minimum volume required
Volume provided
Storage Volume: SA Waters
1.5 runoff volume
Pre -development 1-yr, 24-hr runoff
Post -development 1-yr, 24-hr runoff
Minimum volume required
Volume provided
Cell Dimensions
Fording depth of water
Fording depth of water
Surface area of the top of the bioretention cell
Length:
Width:
-or- Radius
Media and Soils Summary
Drawdown time, ponded volume
Drawdown time, to 24 inches below surface
Drawdown time, total:
In -situ soil:
Soil permeability
Planting media soil:
Sail permeability
Soil composition
• Sand (by weight)
• Fines (by weight)
• Organic (by weight)
Phosphorus Index (P-Index) of media
Form SW401-Bioretention-Rev.8
July 30, 2009
Y.:.. (YorN)
0.46 in
5.52 in/hr
0,590 ft'/sec
1.030 ft'/sec
0.440 ft'/sec
742.0 ft'
764.0 ft' OK
It'
ft'
fta
0 ft'
fta
12 inches OK
1.00 Ill
938.0 ftz OK
ft
ft
ft
12 fir OK
36 fir OK
48 fir
0.03 in/hr Insufficient. Increase infiltration rate.
1.00 in/hr OK
85% OK
10% OK
5% OK
Total: 100%
10 (unitless) OK
Parts I and II. Design Summary, Page 1 of 2

Permit Number:
(to be provided by D WO)
Basin Elevations
Temporary pool elevation 27.00 first
Type of bioretenlion cell (answer 'Y" to only one of the two
following questions): _
Is this a grassed cell? N (Y or N)
Is this a cell with trees/shrubs? Y '(Y or N) OK media depth
Planting elevation (top of the mulch or grass sod layer) 26 fmsl
Depth of mulch 4inches OK
Bottom of the planting media soil - 23 fmsl
Planting media depth 3 It
Depth of washed sand below planting media soil 4 ft
Are underdrains being installed?
y. . (Y or N)
How many clean out pipes are being installed?
4' OK
What factor of safety is used for sizing the underdrains? (See
p OK
BMP Manual Section 12.3.6)
Additional distance between the bottom of the planting media and
1 ft
the bottom of the cell to account for underdrains
Bottom of the cell required
18 fmsl
SHWT elevation
_
8,17,fmsl
Distance from bottom to SHWT
9.83 It OK
Internal Water Storage Zone (IWS)
Does the design include IWS
Elevation of the top of the upturned elbow
Separation of IWS and Surface
Planting Plan
Number of tree species
Number of shrub species
Number of herbaceous groundcover species
N (Y or N)
fmsl
26 ft
3
3
7• OK
Additional Information _
Does volume in excess of the design volume bypass the Y (Y or N) OK
bioretention cell?
Does volume in excess of the design volume flow evenly distributed. Y , (Y or N) OK
through a vegetated filter?
-
What is the length of the vegetated filter? . 30+ft
Does the design use a level spreader to evenly distribute flow? Y (Y or N) Submit a level spreader supplement.
Is the BMP located at least 30 feet from surface waters (50 feet if
- Y
(Y or N)
OK
SA waters)?
Is the BMP located at least 100 feel from water supply wells?
Y
(Y or N)
OK
Are the vegetated side slopes equal to or less than 3:1?
Y
(Y or N)
OK
Is the BMP located in a proposed drainage easement with access
Y,,
(Y or N)
OK
to a public Right of Way (ROW)?
Inlet velocity (from treatment system)
I fusec
OK
Is the area surrounding the cell likely to undergo development in
N
. (Y or N)
OK
the future?
Are the slopes draining to the bioretention cell greater than 20%?
N ,.
(Y or N)
OK
Is the drainage area permanently stabilized?
Y
(Y or N)
OK
Pretreatment Used
(Indicate Type Used with an'X' in the shaded cell)
Gravel and grass
(81inches gravel followed by 3-5 ft of grass)
Grassed swale
X
OK
Forebay
Other
Form SW401-Bioretention-Rev.8
July 30, 2009 Parts I and il. Design Summary, Page 2 of 2

Permit No:
(lo be asslgnect by 0W0f
IIC"REQUIREDfiEM$'CNECNLISTAr-1 x;`_ "'y.'LrF" "•i 14i «:yY m} if .�3 .; a
Please indicate the page or plan sheet numbers where the supporting documentation can be found. An incomplete submittal package will
result in a request for additional information. This will delay final review and approval of the project. Initial in the space provided to
indicate the following design requirements have been met. If the applicant has designated an agent, the agent may initial below. If a
requirement has not been met, attach justification.
Page/ Plan
Initials Sheet No.
1. Plans It' - 50' a larger) of the entire site showing:
- Design at ultimate build -out,
- OH -site drainage (if applicable).
- Delineated drainage basins (include Rational C coefficient per basin),
- Cell dimensions,
- Pretreatment system,
- High now bypass system,
- Maintenance access,
- Recorded drainage easement and public right of way (ROW),
- Clean out pipe locations,
- Overflow device, and
- Boundaries of drainage easement.
2. Plan details (1' = 30' or larger) for the bioretention cell showing:
- Cell dimensions
- Pretreatment system,
- High flaw bypass system,
- Maintenance access,
- Recorded drainage easement and public right of way (ROW),
- Design at ultimate build -out,
- Off -site drainage (if applicable),
- Clean out pipe locatons,
- Overflow device, and
- Boundaries of drainage easement.
- Indicate the P-Index between 10 and 30
'.T�W C - l [
3. Section view of the bioretenton cell (1' = 20' or Iargeo showing:
- Side slopes, 3:1 or laver
- Underdrain system (if applicable), and
- Biorelention call layers [ground level and slope, pre-treatment, panting depth, mulch depth, fill media
depth, washed sand, filter fabric (or choking stone if applicable), #57 stone, underdrains (if applicable),
SH Wf level(s), and overflow structure[
A soils report that is based upon an actual field investigation, soil borings, and infiltration tests. The
results of the sals report must be verified in the field by OWO, by completing & submitting the soils
investigation request tonn. County sal maps are not an acceptable source of soils information. All
elevations shall be in feet mean sea level (fmsl). Results of sals tests of both the planting soil and the in
situ soil must include:
- Soil permeability,
- Sal composition (% sand, % fines, % organic), and
P-index.
5. A detailed planting plan (1' = 20' or larger) prepared by a qualified individual showing:
- A variety of suitable species,
- Sizes, spacing and locations of plantings,
- Total quantity of each type of plant specified,
A planting detail,
- The source nursery for the plants, and
- Fertilizer and watering requirements to establish vegetation.
A�ao)ft[-6 6. An assurance that the installed system will meet design specifications upon initial operation once the
r project is complete and the entire drainage area is stabilized.
10 7. A construction sequence that shows how the bioretention cell will be protected from sediment until the
entire drainage area is stabilized.
1CAJ i1tj�l 8. The supporting calculations (including underdrain calculations, if applicable).
-to F*r'Xv100 9. A copy of the signed and notarized inspection and maintenance (11A) agreement.
!F (u MCn110. A copy of the deed restriction.
Form SW401-ao etentb Rev.7 Part III. Page 1 or 1

Bioretention Area Supporting Calculations
Area - DA-5
Peak Inflow Calculations
Pre -development Impervious Percentage,-,,,,
Post -development Impervious Percenta
Pre -development Run-off Coefficient (�C
Post -development Run-off Coefficient •C
Rainfall Depth 'Rd')
1' r, 24,hr,rainfall'Intensit � I fi=�'. sir
Pre -development 1-yr 24 hr peak flow (Q)
:. ( is i i*,
Q='C'I'A ':,•
Post -development :1.-yr; 24-hrpeak flow
Q.='C'ItA�. ,triad, :',"
Storage Volumes: Non SR Waters Calculations
Rv=405+!9'(impeivious(ac)/DA'(ac))'
Volume required = 3630 Rd ' Rv
Volume; provided ,!'; .• x "•' '
Temporarypool area tw Q
Bottom pool area
Basin Structure Calculations
Cleanouts.Used: Yor N
::. Minimum Surface Areai(fL)
,; , ', ';
W., ,
)_'; --
°'•n^,`�� ro,t „'
'. ;..
A .4
Q'=
(0)
k,r 'Q=
3'":.=., H• ,p:
;Rv=
",� r
938
� V
' V=
Y
742
0.010
A 99°/u
0.30
0.52
1.5 in
5.52 in/hr
0.59 ft /sec
1.03ft/sec
0.383
764 ft
'14"I i' Pondifi Depth
1 feet
LandscapingRequirements
Basin SA in; acres),*,400/acre:,:;
9 -
Minimum Trees/Shrubs Required
1'cleanout/1000(fi) 6f 8asln'
0,938
Required
4
Provided
Underdrains
In -,Situ soil permeability:i:' "
0
in/hr
Underdrains Required
eO3
Yes
Calculations
tt'/sec
Draina a Area A
15,503 SF ✓
0.36 Acres
Pre=developmentlmpervious'Area
0 SF
0.00 Acres
Post-developmenDlm e
` ActuaLSize(ft,)
938
Post Development Flow =
1.03
roughness coefficient ''' :n= `
0.011
veralf-Diameter • - D=.
1.38
;. Underdrain.Formula., ,
Tatile'S=1 BMPManual"
-4" Underdrains'Requved
2 ,

Bioretention Area Supporting Calculations
Area - DA-5
Intensity Calculations
Finding: The.l0yr;�24`-hr Storm;.
6.25
inches
b readi attached chart'"';;. ('
Time of Concentration Calculations
Hydraulic Lebgth; ft: ,,La-s'; :h;.:-.
200
feet
Change in Elevation.(ft.), H..'
5
feet
Time of Conc.: T,
5.00
minutes
43{H)5/128
10 r Peak Intensity Calculations
Finding he 10yr,@,Tc'
0.68
inches
b readin attached chart
d in /tc min `60 min/hr ''
8.16
inches/hour
1 r Peak Intensity Calculations
Finding The tyr,@ Tc
0.46
inches
by readin attached'chartlt;=nw'.
d(in)/tc min '60 min/nr
5.52
l inches/hour

Permit Number:
(to be provider! by DWQ)
Drainage Area Number:
Bioretention Operation and Maintenance Agreement
I will keep a maintenance record on this BMP. This maintenance record will be kept in a
log in a known set location. Any deficient BMP elements noted in the inspection will be
corrected, repaired or replaced immediately. These deficiencies can affect the integrity
of structures, safety of the public, and the removal efficiency of the BMP.
Important operation and maintenance procedures:
— Immediately after the bioretention cell is established, the plants will be watered
twice weekly if needed until the plants become established (commonly six
weeks).
— Snow, mulch or any other material will NEVER be piled on the surface of the
bioretention cell.
— Heavy equipment will NEVER be driven over the bioretention cell.
— Special care will be taken to prevent sediment from entering the bioretention cell.
— Once a year, a soil test of the soil media will be conducted.
After the bioretention cell is established, I will inspect it once a month and within 24
hours after every storm event greater than 1.0 inches (or 1.5 inches if in a Coastal
County). Records of operation and maintenance will be kept in a known set location
and will be available upon request.
Inspection activities shall be performed as follows. Any problems that are found shall
be repaired immediately.
BMP element:
Potentialproblems:
How 1 will remediate theproblem:
The entire BMP
Trash/debris is present,
Remove the trash/debris.
The perimeter of the
Areas of bare soil and/or
Regrade the soil if necessary to
bioretention cell
erosive gullies have formed.
remove the gully, and then plant a
ground cover and water until it is
established. Provide lime and a
one-time fertilizer application.
The inlet device: pipe,
The pipe is clogged (if
Unclog the pipe. Dispose of the
stone verge or swale
applicable).
sediment off -site.
The pipe is cracked or
Replace the pipe.
otherwise damaged (if
applicable).
Erosion is occurring in the
Regrade the swale if necessary to
Swale (if applicable).
smooth it over and provide erosion
control devices such as reinforced
turf matting or riprap to avoid
future problems with erosion.
Stone verge is clogged or
Remove sediment and clogged
covered in sediment (if
stone and replace with clean stone.
applicable).
Form SW401-Bioretention O&M-Rev.3 Page 1 of

BMP element:
Potentialproblems:
How I will remediate theproblem:
The pretreatment area
Flow is bypassing
Regrade if necessary to route all
pretreatment area and/or
flow to the pretreatment area.
gullies have formed.
Restabilize the area after grading.
Sediment has accumulated to
Search for the source of the
a depth greater than three
sediment and remedy the problem if
inches.
possible. Remove the sediment and
restabilize the pretreatment area.
Erosion has occurred.
Provide additional erosion
protection such as reinforced turf
matting or riprap if needed to
prevent future erosion problems.
Weeds are present.
Remove the weeds, preferably by
hand.
The bioretention cell:
Best professional practices
Prune according to best professional
vegetation
show that pruning is needed
practices.
to maintain optimal plant
health.
Plants are dead, diseased or
Determine the source of the
dying.
problem: soils, hydrology, disease,
etc. Remedy the problem and
replace plants. Provide a one-time
fertilizer application to establish the
ground cover if a soil test indicates
it is necessary.
Tree stakes/wires are present
Remove tree stake/wires (which
six months after planting.
can kill the tree if not removed).
The bioretention cell:
Mulch is breaking down or
Spot mulch if there are only random
soils and mulch
has floated away.
void areas. Replace whole mulch
layer if necessary. Remove the
remaining much and replace with
triple shredded hard wood mulch at
a maximum depth of three inches.
Soils and/or mulch are
Determine the extent of the clogging
clogged with sediment.
- remove and replace either just the
top layers or the entire media as
needed. Dispose of the spoil in an
appropriate off -site location. Use
triple shredded hard wood mulch at
a maximum depth of three inches.
Search for the source of the
sediment and remedy the problem if
possible.
An annual soil test shows that
Dolomitic lime shall be applied as
pH has dropped or heavy
recommended per the soil test and
metals have accumulated in
toxic soils shall be removed,
the soil media.
disposed of properly and replaced
with new planting media.
Form S W401-Bioretention O&M-Rev.3 Page 2 of 4

BMP element:
Potentialproblems:
How I will remediate theproblem:
The underdrain system
Clogging has occurred.
Wash out the underdrain system.
if applicable)
The drop inlet
Clogging has occurred.
Clean out the drop inlet. Dispose of
the sediment off -site.
The drop inlet is damaged
Repair or replace the drop inlet.
The receiving water
Erosion or other signs of
Contact the NC Division of Water
damage have occurred at the
Quality 401 Oversight Unit at 919-
outlet.
733-1786.
Form SW401-Bioretention O&M-Rev.3 Page 3 of 4

Permit Number:
X
(to be provided by DIPQ)
I acknowledge and agree by my signature below that I am responsible for the
performance of the 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.
Project name:lnnsbrook Clubhouse Villas
BMP drainage area number:
Print name:Mike Collins
Title:Chief Executive Officer
Address:300 F. McBee Aventte,Saite 299 SS gxe4�i eiue 5�. k-l�w
Phone:[phone] Grc e v tlL- . Sc 7A 4,ok
Date: ( A9--30
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, �uszo r)e G . 9I 4ol , a Notary Public for the State of
Ukh Cara ( ntti, County of Greenv�me , do hereby certify that
s �Dh n I t t ' I ( i �)K personally appeared before me this `P
day of 1)2Ceh ito4�,r , 9O(i , and acknowledge the due execution of the
forgoing bioretention maintenance requirements. Witness my hand and official seal,
SEAL
My commission expires 11-1- .01(n
Form SW401-Bioretention IRM-Rev. 2 Page 4 of 4

Permit Number:
Ito be provided by DWO)
RWA OF W ATpq
y y
NCDENR
EXPRESS
JAN 1 1 2-MUMWATER MANAGEMENT PERMIT APPLICATION FORM
401 CERTIFICATION APPLICATION FORM
IBC DENRBIORETENTION CELL SUPPLEMENT
This form must be filled out, printed and submitted.
The Required Items Checklist (Part III) must be printed, filled out and submitted along with all of the required information.
(..PROJECT INFORMATION
Project name Innsbrook Clubhouse Villas and Amenity Center
Contact name
Phone number
Date
Drainage area number
II.�DESIGNINFORMATION
Site Chararteristire
Drainage area
Impervious area
Percent impervious
Design rainfall depth
Peak Flow Calculations
75,412 ft2
25,537 ft2 /
33.9% %
1.5 inch y
Is pre/post control of the 1-yr, 24-hr peak flow required? Y- (Y or N)
1-yr, 24-hr runoff depth 0.46 in
1-yr, 24-hr intensity 5.52 inthr
Pre -development 1-yr, 24-hr peak flow 2.870 ft'/sec
Post -development 1-yr, 24-hr peak flow 4.810 ft'/sec
Pre/Post 1-yr, 24-hr peak control 1940.ft'/sec
Storage Volume: Non -SA Waters
Minimum volume required
3,344.0 ft'
Volume provided
3,368.0 ft' OK
Storage Volume: SA Waters
1.5' runoff volume
"ft'
Pre -development 1-yr, 24-hr runoff
- ft'
Post -development 1-yr, 24-hr runoff
ft'
Minimum volume required
0 ft'
Volume provided
ft'
Cell Dimensions
Fording depth of water
12 inches OK
Fording depth of water
1.00 It
Surface area of the lop of the bioretention cell
3,713.0 ft2 OK
Length:
ft
Width:
ft
-or- Radius
- It
Media and Soils Summary
Drawdown time, ponded volume
12 hr
OK
Drawdown time, to 24 inches below surface
- 36 hr
OK
Drawdown time, total:
48 hr
In-sdu soil:
Soil permeability
0.03 in/hr
Insufficient. Increase infiltration rate.
Planting media soil..
Soil permeability
- 1.00 inthr
OK
Soil composition
% Sand (by weight)
85%'
OK
% Fines (by weight)
10%
OK
% Organic (by weight)
5%
OK
Total: 100%
Phosphorus Index (P-Index) of media 10 (unitless) OK
Form SW401-Bioretenlion-Rev.8
July 30, 2009
Parts I and II. Design Summary, Page 1 of 2

Permit Number:
(to be provided by DWO)
Basin Elevations
Temporary pool elevation
25.00 fmsl
Type of bioretention cell (answer 'Y' to only one of the two
following questions):
_
Is this a grassed cell?
N' ' (Y or N)
Is this a cell with trees/shrubs?
Y. -, (Y or N) OK media depth
Planting elevation (top of the mulch or grass sod layer)
24 fmsl
Depth of mulch
4 inches OK
Bottom of the planting media soil
21 mist
Planting media depth
3 It
Depth of washed sand below planting media soil
4. It
Are underdrains being installed?
Y (Y or N)
How many clean out pipes are being installed?
4 OK
What factor of safety is used for sizing the underdrains? (See
t
2 OK
BMP Manual Section 12.3.6)
Additional distance between the bottom of the planting media and
1 ft
the bottom of the cell to account for underdrains
Bottom of the cell required
16 fmsl
SHWT elevation
8.17fmsl
Distance from bottom to SHWT
7.83 ft OK
Internal Water Storage Zone (IWS)
Does the design include IWS
Elevation of the top of the upturned elbow
Separation of IWS and Surface
Planting Plan
Number of tree species
Number of shrub species
Number of herbaceous groundcover species
N (Y or N)
fmsl
24 ft
10
19
24
OK
Additional Information
Does volume in excess of the design volume bypass the Y;:, (Y or N) OK
bioretention cell? t i
Does volume in excess of the design volume Flow evenly distributed
through a vegetated filter?Y� (Y or N) OK
What is the length of the vegetated filter? 30+1t
Does the design use a level spreader to evenly distribute flow? Y (Y or N) Submit a level spreader supplement
Is the BMP located at least 30 feet from surface waters (50 feet if ';
' Y
(Y or N)
OK
SA waters)?
Is the BMP located at least 100 feet from water supply wells?
Y
(Y or N)
OK
Are the vegetated side slopes equal to or less than 3:1?
Y
(Y or N)
OK
Is the BMP located in a proposed drainage easement with access
.Y
(Y or N)
OK
to a public Right of Way (ROW)?
Inlet velocity (from treatment system)
1 ft/sec
OK
Is the area surrounding the cell likely to undergo development in
N
(Y or N)
OK
the future?
Are the slopes draining to the bioretention cell greater than 20%?
N ,.
(Y or N)
OK
Is the drainage area permanently stabilized?
Y -
(Y or N)
OK
Pretreatment Used
(Indicate Type Used with an'X' in the shaded cell)
-
Gravel and grass
(8inches gravel followed by 3-5 It of grass)
Grassed Swale
X
OK
Forebay
Other
Form SW401-131oretention-Rev.8
July 30, 2009 Parts I and II. Design Summary, Page 2 of 2

Permit No:
lto be a551gnw by DWO)
III: REQUIRED REM$'CHECKLIST°.:
Please indicate the page or plan sheet numbers where the supporting documentation can be found. An incomplete submittal package will
result In a request for additional information. This will delay final review and approval of the project Initial in the space provided to
indicate the following design requirements have been met. II the applicant has designated an agent, the agent may initial below. If a
requirement has not been met, attach justification. .
Page/ Plan
Initials Shad No.
1. Plans (1' - 59 or larger) of the entire site showing:
- Design at ultimate build -out,
- Off -site drainage (if applicable),
- Delineated drainage basins (include Rational C coefficient per basin),
- Cell dimensions,
- Pretreatment system,
- High Raw bypass system,
- Maintenance access,
- Recorded drainage easement and public right of way (ROW),
- Clean out pipe locations,
- Overflow device, and
- Boundaries of drainage easement.
T F Q C - S 2. Plan details (1' = 30' or lager) for the bioretention cell showing:
- Cell dimensions
- Pretreatment system,
- High flow bypass system,
- Maintenance access,
- Recorded drainage easement and public right of way (ROW),
- Design at ultimate build -out,
- OR -site drainage (if applicable),
- Clean out pipe locations,
- Overflow device, and
- Boundaries of drainage easement.
- Indicate the P-Index between 10 and 30
C _ 11 3. Section view of the bioretention cell IV = 20' or larger) showing:
- Side slopes, 3:1 or lower
- Underdrain system (if applicable), and
- Biorelention cell layers [ground level and slope, pre-treatment, ponding depth, mulch depth, fill media
depth, washed sand, filter fabric (or choking stone if applicable), #57 stone, underdrains (If applicable),
SHWT level(s), and overflow structural
TF4J 040 c fWLAW. A soils report that is based upon an actual field investigation, soil borings, and infiltration tests. The
results of the soils report must be verified in the field by DWO, by completing 8 submitting the soils
investigation request form. County soil maps are not an acceptable source of soils information. All
elevations shall be in feet mean sea level (frost). Results of soils tests of both the planting soil and the in
situ soil must include:
- Soil permeability,
- Soil composifion (% sand, % fines, % organic), and
P-index.
�--- 5. A detailed planting plan (1' = 20' or larger) prepared by a qualified individual showing:
- A variety of suitable species,
- Sizes, spacing and locations of plantings,
- Total quantity of each type of plant specified,
- A planting detail,
- The source nursery for the plants, and
- Fertilizer and watering requirements to establish vegetation.
AAAOi c W14 6. An assurance that the installed system will meet design specifications upon initial operation once Me
project is complete and the entire drainage area is stabilized.
T C - 10 7. A construction sequence that shows how the biorelention cell will be protected from sediment until the
entire drainage area is stabilized.
TCAJ d �%1 8. The supporting calculations (including underdrain calculations, if applicable).
'TEW AAT 0� lft% 9. A copy of the signed and notarized inspection and maintenance (AM) agreement.
*F LU {1i_I&c1iNGA,110. A copy of the deed restriction.
Form SW401-8iaretembnRev.7 Part 111, Page 1 of 1

Bioretention Area Supporting Calculations
Area - DA-6
Peak Inflow Calculations
Drainage Area (A)
75,412 SF
1.73 Acres
Pre -development Impervibus Area,
0 SF
0.00 Acres
Post -development Impervious'Area
25,537 SF
0.59 Acres
Pre -development Impervious Percentage
0.00%
Post -development Impervious, Percentagew
33.86%
Pre -development Run-offCoefficient ( C ) ,
0.30
Post -development Run-off Coefficient ( C 7;
ji 0.50
Rainfall Depth:( Rd
1.5 in
1 yr, 24!hr rainfall intensity (I tP�"
5.52 in/hr
Pre-development,l-yr, 247hrpeak,flow
0 = C*l A
2.87 it 3 /sec
Post -development 1-yr,,24-hr peal Ilow,
a = C*l*A
4.81 ft3 /sec
Storage Volumes: Non SIR Waters Calculations
Volume'required 3630 Rdr*4Rv,,* Alq,,, 11
V,
3344.24 ft3
Volume provided
Temporary 'pooI,#rea.,,,.,,,
Bottom pool area 3023
V=1
3368 ft' ✓
Basin Structure Calculations
Cleanouts Used (YorN)J��
Ponding DepW,,,,t,.
Minimum Surface Area (
✓
ft
')l 3344 1 feet
� �,Actual Size (W) 3713
Landscaping Requirements
BisimSA(in acres) * 400/acre Minimum Trees/Shrubs Required
1 Cleanout/1000(ft)of,Basinj 3.713 Required
L 4 Provided
Underdrains
In -Situ soil permeability , 0.03 in/hr
Underdrains Required . Yes
Calculations Underdrain Formula
A 318) Post Development,Flowl,',Q=,, 4.81 ( /sec
P M u
roughne s coeffi
cienu Oil Table 5-1 BIVIP Manual,
Slope S= 0.50% 4" Undeerdrairis Required
Uverall Diameter,�, i,, D= 2
')l 3344 1 feet
� �,Actual Size (W) 3713
Landscaping Requirements
BisimSA(in acres) * 400/acre Minimum Trees/Shrubs Required
1 Cleanout/1000(ft)of,Basinj 3.713 Required
L 4 Provided
Underdrains
In -Situ soil permeability , 0.03 in/hr
Underdrains Required . Yes
Calculations Underdrain Formula
A 318) Post Development,Flowl,',Q=,, 4.81 ( /sec
P M u
roughne s coeffi
cienu Oil Table 5-1 BIVIP Manual,
Slope S= 0.50% 4" Undeerdrairis Required
Uverall Diameter,�, i,, D= 2

Bioretention Area Supporting Calculations
Area - DA-6
Intensity Calculations _
Fmding.The,l0yr:24=hrS(orm:
6.25
inches
breadinattacfiedchart�"'.;
Time of Concentration Calculations
Hydraulic Length(ft.). L° ; `'
450
feet
Change ih.Elevatlon (ft:), H' -'
13
feet
Time of,Conc Tc`,',"• '
7
'_l0/H).',' V128 • '
5.00
minutes
10 r Peak Intensity Calculations
Fintling.The,tOyr, @:Tc .
0.68
inches
b readin .attached:chart...•....:•
d in /lc min `60 min/nr' ' <ri.. 1
8.16
inches/hour
1 r Peak Intensity Calculations
FindingThelyr,,@,Tc
0.46
inches
b readin at'tachedchart ,
d in /tc min `60 min/hr ` ""
5.52
inches/hour

Permit Number:
(to be provided by D IVQ)
Drainage Area Number:
Bioretention Operation and Maintenance Agreement
I will keep a maintenance record on this BMP. This maintenance record will be kept in a
log in a known set location. Any deficient BMP elements noted in the inspection will be
corrected, repaired or replaced immediately. These deficiencies can affect the integrity
of structures, safety of the public, and the removal efficiency of the BMP.
Important operation and maintenance procedures:
— Immediately after the bioretention cell is established, the plants will be watered
twice weekly if needed until the plants become established (commonly six
weeks).
— Snow, mulch or any other material will NEVER be piled on the surface of the
bioretention cell.
— Heavy equipment will NEVER be driven over the bioretention cell.
— Special care will be taken to prevent sediment from entering the bioretention cell.
— Once a year, a soil test of the soil media will be conducted.
After the bioretention cell is established, I will inspect it once a month and within 24
hours after every storm event greater than 1.0 inches (or 1.5 inches if in a Coastal
County). Records of operation and maintenance will be kept in a known set location
and will be available upon request.
Inspection activities shall be performed as follows. Any problems that are found shall
be repaired immediately.
BMP element:
Potentialproblems:
How l will remediate theproblem:
The entire BMP
Trash/debris is present.
Remove the trash/debris.
The perimeter of the
Areas of bare soil and/or
Regrade the soil if necessary to
bioretention cell
erosive gullies have formed.
remove the gully, and then plant a
ground cover and water until it is
established. Provide lime and a
one-time fertilizer application.
The inlet device: pipe,
The pipe is clogged (if
Unclog the pipe. Dispose of the
stone verge or Swale
applicable).
sediment off -site.
The pipe is cracked or
Replace the pipe.
otherwise damaged (if
applicable).
Erosion is occurring in the
Regrade the swale if necessary to
swale (if applicable).
smooth it over and provide erosion
control devices such as reinforced
turf matting or riprap to avoid
future problems with erosion.
Stone verge is clogged or
Remove sediment and clogged
covered in sediment (if
stone and replace with clean stone.
applicable).
Form S W401-Bioretention O&M-Rev.3 Page 1 of 4

BMP element:
Potentialproblems:
How I will remediate theproblem:
The pretreatment area
Flow is bypassing
Regrade if necessary to route all
pretreatment area and/or
Flow to the pretreatment area.
gullies have formed.
Restabilize the area after grading.
Sediment has accumulated to
Search for the source of the
a depth greater than three
sediment and remedy the problem if
inches.
possible. Remove the sediment and
restabilize the pretreatment area.
Erosion has occurred.
Provide additional erosion
protection such as reinforced turf
matting or riprap if needed to
prevent future erosion problems.
Weeds are present.
Remove the weeds, preferably by
hand.
The bioretention cell:
Best professional practices
Prune according to best professional
vegetation
show that pruning is needed
practices.
to maintain optimal plant
health.
Plants are dead, diseased or
Determine the source of the
dying.
problem: soils, hydrology, disease,
etc. Remedy the problem and
replace plants. Provide a one-time
fertilizer application to establish the
ground cover if a soil test indicates
it is necessary.
Tree stakes/wires are present
Remove tree stake/wires (which
six months after Iantin .
can kill the tree if not removed).
The bioretention cell:
Mulch is breaking down or
Spot mulch if there are only random
soils and mulch
has floated away.
void areas. Replace whole mulch
layer if necessary. Remove the
remaining much and replace with
triple shredded hard wood mulch at
a maximum depth of three inches.
Soils and/or mulch are
Determine the extent of the clogging
clogged with sediment.
- remove and replace either just the
top layers or the entire media as
needed. Dispose of the spoil in an
appropriate off -site location. Use
triple shredded hard wood mulch at
a maximum depth of three inches.
Search for the source of the
sediment and remedy the problem if
possible.
An annual soil test shows that
Dolomitic lime shall be applied as
pH has dropped or heavy
recommended per the soil test and
metals have accumulated in
toxic soils shall be removed,
the soil media.
disposed of properly and replaced
with new planting media.
Fonn SW401-Bioretention O&M-Rev.3 Page 2 of 4

BMP element:
Potentialproblems:
How I will remediate theproblem:
The underdrain system
Clogging has occurred.
Wash out the underdrain system.
if applicable)
The drop inlet
Clogging has occurred.
Clean out the drop inlet. Dispose of
the sediment off -site.
The drop inlet is damaged
Repair or replace the drop inlet.
The receiving water
Erosion or other signs of
Contact the NC Division of Water
damage have occurred at the
Quality 401 Oversight Unit at 919-
outlet.
733-1786.
Form SW401-Bioretention O&M-Rev.3 Page 3 of 4

x
Permit Number:
(to be provided by DWQ)
I acknowledge and agree by my signature below that I am responsible for the
performance of the 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.
Project name:lnnsbrook Clubhouse Villas
BMP drainage area number: DA 6
Print name:Mike Collins
Title:Chief Executive Officer
Address:360 E. t;B _ _ e __—_ _ j S P0.: it< Q \q� r SL"'A' o0
Note: The legally responsible party should not be a homeowners association unless more than 50% of
the lots have been sold and a resident of the subdivision has been named the president.
1, &xvtA nne e 61 AEK , a Notary Public for the State of
,5r4 rafrd t Y. o, County of rypp \7i 11E do hereby certify that
c 'bh✓1 i i� . �'�� vs personally appeared before me this
day of bKa ) fir , and acknowledge the due execution of the
forgoing bioretention maintenance requirements. Witness my hand and official seal,
o hS2- ,�LYI
u
SEAL
My commission expires �
Form SW401-Bioretention 1&M-Rev. 2
Page 4 of 4

Permit Number:
(to be provided by DWO)
WFWAT(.4
WA
t"C v_
EXPRESS
NCDENR g R
JAN 1 1 26TU MWATER MANAGEMENT PERMIT APPLICATION FORM
401 CERTIFICATION APPLICATION FORM
NC DENR BIORETENTION CELL SUPPLEMENT
This form must be filled out, printed and submitted.
The Required Items Checklist (Part 111) must be printed, filled out and submitted along with all of the required information.
I.'PROJECT INFORMATION ,.f Lr"
Project name Innsbrook Clubhouse Villas and Amenity Center
Contact name Tom Wanko
Phone number 910-692-5616
Date December 9, 2009
Drainage area number DA-7
Il.,DESIGN INFORMATION � +» •-.
—�
"'
Site Characteristics
/
Drainage area
103,261 ftz V
Impervious area
34,437Ili J
Percent impervious
33.3% %
Design rainfall depth
1.5 inch ✓
Peak Flow Calculations
Is pre/post control of the 1-yr, 24-hr peak flow required?
Y (Y or N)
1-yr, 24-hr runoff depth
0.46 in
1-yr, 24-hr intensity
5.52 in/hr
Pre -development 1-yr, 24-hr peak flow
3.930 ft3/sec
Post -development 1-yr, 24-hr peak flow
6.540 ft3/sec
Pre/Post 1-yr, 24-hr peak control
2.610 ft3/sec
Storage Volume: Non -SA Waters
Minimum volume required
_
4,520.0 ft3
Volume provided
4,626.0 ft3
OK
Storage Volume: SA Waters
1,5- runoff volume
ry3
Pre -development 1-yr, 24-hr runoff
, It
Post -development 1-yr, 24-hr runoff
it
Minimum volume required
0 1
Volume provided
fl3
Cell Dimensions
Fording depth of water
12 inches
OK
Ponding depth of water
1.00 It
Surface area of the top of the bioretention cell
5,092.0 It'
OK
Length:
It
Width:
It
-or- Radius
It
Media and Soils Summary
Drawdown time, ponded volume
12 hr
OK
Drawdown time, to 24 inches below surface
36 hr
OK
Drawdown time, total:
48 hr
In -situ soil:
Soil permeability
- 0.03 inlhr
Insufficient. Increase infiltration rate.
Planting media soil:
Soil permeability
1.00 in/hr
OK
Soil composition
% Sand (by weight)
85%
OK
% Fines (by weight)
10%
OK
% Organic (by weight)
5%
OK
Total: 100%
Phosphorus Index (P-Index) of media
10 (unitless)
OK
Form SW401-Bioretention-Rev.e
July 30, 2009
Pans I and 11. Design Summary, Page 1 or 2

Permit Number:
(to be provided by DWO)
Basin Elevations
Temporary pool elevation
22.00 fmsl
Type of bioretention cell (answer 'Y" to only one of the two
following questions):
Is this a grassed cell?
Y (Y or N)
OK
Is this a cell with trees/shrubs?
N. (Y or N)
Planting elevation (top of the mulch or grass sod layer)
21 fmsl
Depth of mulch
4inches
OK
Bottom of the planting media soil
- 19 fmsl
Planting media depth
2 ft
Depth of washed sand below planting media soil
4 it
Are underdrains being installed?
Y (Y or N)
How many clean out pipes are being installed?
6
OK
What factor of safety is used for sizing the underdrains? (See
- p
OK
BMP Manual Section 12.3,6)
Additional distance between the bottom of the planting media and
1 It
the bottom of the cell to account for underdrains
Bottom of the cell required
14 fmsl
SHWT elevation
_
` 8.17 fmsl
Distance from bottom to SHWT
5.83 ft
OK
Internal Water Storage Zone (IWS) _
Does the design include IWS N. (Y or N)
Elevation of the top of the upturned elbow fmsl
Separation of IWS and Surface 21 ft
Planting Plan
Number of tree species
Number of shrub species
Number of herbaceous groundcover species -
Additional Information
Does volume in excess of the design volume bypass the
,. Y
(Y or N)
OK
bioretention cell?
Does volume in excess of the design volume flow evenly distributed
Y
(Y or N)
OK
through a vegetated filter?
What is the length of the vegetated filter?
30+ft
Does the design use a level spreader to evenly distribute flow?
Y
(Y or N)
Submit a level spreader supplement.
Is the BMP located at least 30 feet from surface waters (50 feet if
Y
(Y or N)
OK
SA waters)?
Is the BMP located at least 100 feet from water supply wells?
Y
(Y or N)
OK
Are the vegetated side slopes equal to or less than 3:1?
Y
- (Y or N)
OK
Is the BMP located in a proposed drainage easement with access
Y
(Y or N)
OK
to a public Right of Way (ROW)?
Inlet velocity (from treatment system) 3.18 ft/sec Insufficient inlet velocity unless energy dissipating devices are
being used.
Is the area surrounding the cell likely to undergo development in N (Y or N) OK
the future?
Are the slopes draining to the bioretention cell greater than 20%? N (Y or N) OK
Is the drainage area permanently stabilized? Y (Y or N) OK
Pretreatment Used
(Indicate Type Used with an'X' in the shaded cell)
Gravel and grass
(8inches gravel followed by 3-5 It of grass)
Grassed swale - X OK
Forebay
Other
Form SW401-Bioretention-Re,ft
July 30, 2009 Parts I and II. Design Summary, Page 2 or 2

Permit No:
tto be assigneo by DM)
[It REQUIRE DITEMSCHECKLIST!
a"a`i'
Please indicate the page or plan sheet numbers where the supporting documentation can be found. An Incomplete submittal package will
resuN in a request for additional information. This will delay final review and approval of the project. Initial in the space provided to
Indicate the following design requirements have been met. If the applicant has designated an agent, the agent may initial below. If a
requirement has not been mel, attach justification.
Page/ Plan
Initials Sheet No.
1. Plans If" - 50' or larger) of the entire site showing:
- Design at ultimate build -an,
- Off-stte drainage (if applicable),
- Delineated drainage basins (include Rational C coefficient per basin),
- Cell dimensions.
- Pretreatment system,
- High flow bypass system,
- Maintenance access,
- Recorded drainage easement and public right of way (RCW),
- Clean out pipe locations,
- Overflow device, and
- Boundaries of drainage easement.
T 1J C - 5 2. Plan details (1' = 30' or larger) for the bioretention cell showing
- Cell dimensions
- Pretreatment system,
- High flow bypass system,
- Maintenance access,
- Recorded drainage easement and public right of way (ROW),
- Design at ultimate build -out,
- Ott -site drainage (if applicable),
- Clean out pipe locations,
- Overflow device, and
- Boundaries of drainage easement.
- Indicate the P-Index between 10 and 30
'gyp C - liI 3. Section view of the bioretention cell (1' = 20' or larger) showing:
- Side slopes, 3:1 or lower
- Underdrain system (if applicable), and
- Bicretention cell layers [ground level and slope, pre-treatment, pondmg depth, mulch depth, fill media
depth, washed sand, filter fabric (or choking stone if applicable), f157 stone, underdrains (if applicable),
SHWT level(s), and overflow structure)
TIP VJ 4"" Ci wee. wk, A soils report that is based upon an actual field investigation, soil borings, and infiltration tests. The
results of the soils report must be verified in the field by DWO, by completing & submitting the soils
investigation request form. County soil maps are not an acceptable source of soils information All
elevations shall be in feet mean sea level (fmsl). Results of soils tests of both the planting soil and the in
situ soil must include:
- Soil permeability,
- Soil composition (% sand, % fines, % organic), and
- P-index.
-1-t-
1 W L-1 5. A detailed planting plan (1' = 20' or larger) prepared by a qualified individual showing:
- A variety of suitable species,
- Sizes, spacing and locations of plantings,
- Total quantity of each type of plant specified,
- A planting detail,
- The source nursery for the plants, and
- Fertilizer and watering requirements to establish vegetation.
!: W AJAO cJWi-6 6. An assurance that the installed system will meet design specifications upon initial operation once the
project is complete and the entire drainage area is stabilized.
10 7. A construction sequence that shows how the bioretention cell will be protected from sediment until the
1 entire drainage area is stabilized.
i1}�a.4vwne.�l 6. The supporting calculations (including underdrain calculations, it applicable).
.l.c — A#aa"ewyl 9. A copy of the signed and notarized inspection and maintenance (AM) agreement.
TF w MC vl1o. A copy of the deed restriction.
Form SW401-ebreternbn-Ray.7 part III, page 1 of 1

Bioretention Area Supporting Calculations
Area - DA-7
Peak Inflow Calculations
Pre -development Imervious:Percenta a `.
0.00%
Post -development Impervious Percentage •'"
33.35%
Pre -development Run-off Coefficient (C') .,: , , ;.
0.30
Post -development Run-off:Coefficient (C: `"
0.50
Rainfall Depth ( Rd. , ' s � ^ ` '
1.5 in
1 r, 24 hr rainfall intensityI
5.52 in/hr
Pre -development 1-yr 24 hrpeak flow (Q) •=
Q C'I*A , �, �,r Q�=
3.93 ft /sec
Post-development.1-yr, 24-hr peak flow (Q)"'
Q =,C,I;A ., , , v , .: , "Q'=
6.54 ft /sec
Storage Volumes: Non SR Waters Calculations
Rv = .05+.9•(impervious (ac)/DA.(ac))
" Rv=
0.350
Volume required =.3630' Rd `.,Ry, A
r, `V-=
4519.54 ft
Volume, provided`
Temporary pool area ' 5092
Bottom"pool area •., 4160'
,;,�
,FV=
4626 ft
Basin Structure Calculations
'- 'CleanoutsUsed Y.'or.N Y
5• 'Pondin''Deth'"'
lMinimum=Surface.Area(ft.) 4520
FENfeet
"'Actual'Size fU. 5092
LandscapingRequirements
Basin: SA in acres)"400/acre" NA
Minimum Trees/Shrubs Required
1 Cleanout/1000(ft.);of Basin 5.092
Required
6
Provided
Underdrains
In -Situ soil.permeabilit; 0.03
in/hr
Underdrains Required Yes
Calculations
ft /sec
Draina a Area' ,A "^ �
103,261 SF
2.37 Acres
Pre-development.lm envious Area ,.
0 SF
0.00 Acres
Post -development , <,�.:,
34,437 SF
0.79 Acres
PosADevelopmenPFlow� Q=
6.54
rou hness coefficient .
n-,'
1Sloe
:%verallDiameter,D=6
t27
EE
UnderdrainFo�mula_:
_D= 16'(10'Q)'n/((S)^0.05))^(3/6)
Table 5-1 BMP Manual •
4" Unoerdrains Required
2

Bioretention Area Supporting Calculations
Area - DA-7
Intensity Calculations
Finding The
6.25
inches
=rStprm�
t:16 by re6a art
Time of Concentration Calculations
Hydraulic,Length (ft.), L, ,1
510
Ifeet
Change in Elevation H
18
feet
TimeofConc" . T
4L 3 /H'),, 3�ljj 28"
5.00
minutes
10yr Peak Intensity Calculations
Find !ng The
0.68
inches
fayr,
yreadin6,atchch)r, -
d(in)/tc(min )*60(min/hr, ,1 1
8.16
inches/hour
lyr Peak Intensity Calculations
Finding heIr�T
0.46
inches
brea iT att6Ita t
d(in)/tc(min )*60(min/hr) '- '�, ,' I ,
5.52
]inches/hour

Permit Number:
(to be provided by DIVQ)
Drainage Area Number:
Bioretention Operation and Maintenance Agreement
I will keep a maintenance record on this BMP. This maintenance record will be kept in a
log in a known set location. Any deficient BMP elements noted in the inspection will be
corrected, repaired or replaced immediately. These deficiencies can affect the integrity
of structures, safety of the public, and the removal efficiency of the BMP.
Important operation and maintenance procedures:
— Immediately after the bioretention cell is established, the plants will be watered
twice weekly if needed until the plants become established (commonly six
weeks).
— Snow, mulch or any other material will NEVER be piled on the surface of the
bioretention cell.
— Heavy equipment will NEVER be driven over the bioretention cell.
— Special care will be taken to prevent sediment from entering the bioretention cell.
— Once a year, a soil test of the soil media will be conducted.
After the bioretention cell is established, I will inspect it once a month and within 24
hours after every storm event greater than 1.0 inches (or 1.5 inches if in a Coastal
County). Records of operation and maintenance will be kept in a known set location
and will be available upon request.
Inspection activities shall be performed as follows. Any problems that are found shall
be repaired immediately.
BMP element:
Potentialproblems:
How I will remediate theproblem:
The entire BMP
Trash/debris is present.
Remove the trash/debris.
The perimeter of the
Areas of bare soil and/or
Regrade the soil if necessary to
bioretention cell
erosive gullies have formed.
remove the gully, and then plant a
ground cover and water until it is
established. Provide time and a
one-time fertilizer application.
The inlet device: pipe,
The pipe is clogged (if
Unclog the pipe. Dispose of the
stone verge or swale
applicable).
sediment off -site.
The pipe is cracked or
Replace the pipe.
otherwise damaged (if
applicable).
Erosion is occurring in the
Regrade the swale if necessary to
swale (if applicable).
smooth it over and provide erosion
control devices such as reinforced
turf matting or riprap to avoid
future problems with erosion.
Stone verge is clogged or
Remove sediment and clogged
covered in sediment (if
stone and replace with clean stone.
applicable).
Form SW401-Bioretention O&M-Rev.3 Page 1 of 4

BMP element:
Potentialproblems:
How 1 will remediate the roblem:
The pretreatment area
Flow is bypassing
Regrade if necessary to route all
pretreatment area and/or
flow to the pretreatment area.
gullies have formed.
Restabilize the area after grading.
Sediment has accumulated to
Search for the source of the
a depth greater than three
sediment and remedy the problem if
inches.
possible. Remove the sediment and
restabilize the pretreatment area.
Erosion has occurred.
Provide additional erosion
protection such as reinforced turf
matting or riprap if needed to
prevent future erosion problems.
Weeds are present.
Remove the weeds, preferably by
hand.
The bioretention cell:
Best professional practices
Prune according to best professional
vegetation
show that pruning is needed
practices.
to maintain optimal plant
health.
Plants are dead, diseased or
Determine the source of the
dying.
problem: soils, hydrology, disease,
etc. Remedy the problem and
replace plants. Provide a one-time
fertilizer application to establish the
ground cover if a soil test indicates
it is necessary.
Tree stakes/wires are present
Remove tree stake/wires (which
six months after planting.
can kill the tree if not removed).
The bioretention cell:
Mulch is breaking down or
Spot mulch if there are only random
soils and mulch
has floated away.
void areas. Replace whole mulch
layer if necessary. Remove the
remaining much and replace with
triple shredded hard wood mulch at
a maximum depth of three inches.
Soils and/or mulch are
Determine the extent of the clogging
clogged with sediment.
- remove and replace either just the
top layers or the entire media as
needed. Dispose of the spoil in an
appropriate off -site location. Use
triple shredded hard wood mulch at
a maximum depth of three inches.
Search for the source of the
sediment and remedy the problem if
possible.
An annual soil test shows that
Dolomitic Lime shall be applied as
pH has dropped or heavy
recommended per the soil test and
metals have accumulated in
toxic soils shall be removed,
the soil media.
disposed of properly and replaced
with new planting media.
Form SW401-Bioretention O&M-Rev.3 Page 2 of 4

BMP element:
Potentialproblems:
How 1 will remediate theproblem:
The underdrain system
Clogging has occurred.
Wash out the underdrain system.
(if applicable)
The drop inlet
Clogging has occurred.
Clean out the drop inlet. Dispose of
the sediment off -site.
The drop inlet is damaged
Repair or replace the drop inlet.
The receiving water
Erosion or other signs of
Contact the NC Division of Water
damage have occurred at the
Quality 401 Oversight Unit at 919-
outlet.
733-1786.
Form SW401-Bioretention O&M-Rev.3 Page 3 of 4

X
Permit Number:
(to be provided by DWQ)
I acknowledge and agree by my signature below that I am responsible for the
performance of the 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.
Project name:hmsbrook Clubhouse Villas
BMP drainage area number:
Print name:Mike Collins
Title:Chief Executive Officer
Address: cue-9ititcz8� 5s (�j eo�4 41 e Q St . �< 1 oe
Note: The legally responsible party should not be a homeowners association unless more than 50'%u of
the lots have been sold and a resident of the subdivision has been named the president.
I, �iZl1x n ne,� to-�i � , a Notary Public for the State of
pIA Ca yd i riG- , County of ��.Y1V� IIP , do hereby certify that
John M . C'ok' nS personally appeared before me this _3)
day of J a►Jy lr m � , and acknowledge the due execution of the
forgoing bioretention maintenance requirements. Witness my hand and official seal,
SEAL
My commission expires J i - Q —�?atp
Form SW401-Bioretention I&M-Rev. 2 Page 4 of 4

rar utrvn ueenn,VNLY
Reviewer:` v
Q,�J•,`�� North Carolina Department of Environment andSubmit
s
/ice Natural Resources
NCDENR Request for Express Permit Review Time:
Confirm
FILL-IN all the information below and CHECK the Permits) you are requesting for express review. FAX or Email the completed form to Express
Coordinator along with a completed DETAILED narrative, site plan (PDF file) and vicinity map (same items expected in the application package
of the project location. Please include this form in the application package.
• Asheville Region -Alison Davidson 828.296-4698;alison.davidson(c,ncdenr.gov
• Fayetteville or Raleigh Region -David Lee 919-791-4203; david.lee(ancdenr.gov
• Mooresville & -Patrick Grogan 704-663-3772 or patrick.grogan(glncdenr.gov
• Washington Region -Lyn Hardison 252-946.9215 or lyn.hardisond),ncdenr.gov
• Wilmington Region -Janet Russell 910.350.2004 or janet.russell(Tgncdenr.gov
NOTE: Project application received after 12 noon will be stamped in the following work day
Project Name: INNSBROOK CLUBHOUSE VILLAS AND AMENITY CENTER County, BERTIE
Applicant: MIKE COLLINS Company: INNSBROOK GOLF & MARINA
Address: 55 BEATTIE PLACE, SUITE 100 City: GREENVILLE, State: SC Zip: 29601-_
Phone: [phone], Fax: [phone], Email: [e-mail]
Physical Location:SR 1502, AVOCA FARM ROAD
Project Drains into BLACK WALNUT SWAMP waters — Water classification C NSW (for classification see-
http:/lh2o.enr.state.nc.us/bims/reports/reportsWB.html)
Permits of request
SW 7080320
SW
SW
SW
SW
r
JAN 1 12010
NC DENR
Project Located in CHOWAN River Basin. Is project draining to class ORIN waters? Y/N , within''/3 mile and draining to class SA waters YIN or within 1 mile
and draining to class HOW waters? YIN
Engineer/Consultant: THOMAS K. GOODWIN Company: HOBBS, UPCHURCH & ASSOCIATES
Address: PO BOX 1737 City: SOUTHERN PINES, State: NC Zip: 28387-_
Phone: [phone], Fax: [phone], Email: TGOODWIN@HOBBSUPCHURCH,COM
SECTION ONE: REQUESTING A SCOPING MEETING ONLY
❑ Scoping Meeting ONLY ❑ DWQ, ❑ DCM, ❑ DLR, ❑ OTHER:
SECTION TWO: CHECK ONLY THE PROGRAM (S) YOU ARE REQUESTING FOR EXPRESS PERMITTING
❑ 401 Unit ❑ Stream Origin Determination: _ # of stream calls — Please allach TOPO map marking the areas in questions
❑ Intermittent/Perennial Determination: _ # of stream calls — Please attach TOPO map marking the areas in questions
❑ 401 Water Quality Certification ❑ Isolated Welland (_linear ft or _acres)
❑ Riparian Buffer Authorization ❑ Minor Variance ❑ Major General Variance
® State Stormwater ❑ General ❑ SFR, ❑ SFR < 1 ac. ❑Bkhd & Bt Rmp, ❑ Clear & Grub, ❑ Utility ❑ Other
❑ Low Density ❑ Low Density -Curb & Gutter _ # Curb Outlet Swales ❑ Off -site [SW 7080320 (Provide permit #)]
® High Density -Detention Pond 04 # Treatment Systems ❑ High Density -Infiltration _ #Treatment Systems
❑ High Density -Bio-Retention _ # Treatment Systems ❑ High Density —SW Wetlands _ # Treatment Systems
El High Density -Other _ # Treatment Systems / ® MOD:® Major ❑ Minor ❑ Plan Revision ❑ Redev. Exclusion SW (Provide permit#)
❑ Coastal Management ❑ Excavation & Fill ❑ Bridges & Culverts ❑ Structures Information
❑ Upland Development ❑ Marina Development ❑ Urban Waterfront
® Land Quality ® Erosion and Sedimentation Control Plan with 1_0 acres to be disturbed.(CK # _ e0? (for DENR use)) 4 L s -C J
SECTION THREE — PLEASE CHECK ALL THAT IS APPLICABLE TO YOUR PROJECT (for both scoping and express meeting request)
Wetlands on Site ❑ Yes ❑ No
Wetlands Delineation has been completed: ❑ Yes ❑ No
US ACOE Approval of Delineation completed: ❑ Yes ❑ No
Received from US ACOE ❑ Yes ❑ No
For DENRuse
Fee Split for multiple oermits: (Check # 1
Buffer Impacts: ❑ No ❑ YES: _acre(s)
Isolated wetland on Property ❑ Yes ❑ No
404 Application in Process w/ US ACOE: ❑ Yes ❑ No Permit
nm Tt
SUBMITTAL DATES
Fee
SUBMITTAL DATES
I Fee
CAMA
$
Variance (❑ Mal; ❑ Min)
$
SW IN HD, [ILD, ❑ Gen)
$Dp
401:
$
LOS
$ j50D
Stream Deter,_
$
NCDENR EXPRESS March 2009

INNSBROOK GOLF & MARINA LLC.
P O Box 2444
Greenville, SC 29602
PAY
L
ORDER OF
co
DATE 1L--3---:
2099
5]-IW5M
Two Signatures Required
i i ♦ �ta°dewc°er BHIT�MPANY
FOR l.J 28r-
11°00002099ii° 1:05320L6071:0005222b 3234°
EXPRESS
JAN 112010
NC ®ENR

EXPRESS Stormwater Management Narrative
JAN 1 12010 Innsbrook Golf and Marina
Innsbrook Clubhouse Villas and Amenity Center
NC ®ENR Phase 1A
General Information
1. Name of Project:
Innsbrook Cbrbbouse
Bertie County, NC
December 30, 2009
Villas and Amenity Center
2. Street Address, City, County:
Innsbrook Goffand [Marina, Aleny I -lilt, 13erlie Co.
3. Geographic Coordinates: 8266'53.57N 2M320.33W
4. Acres in Tract: 6.54 acres
5. Acres Being Disturbed: 5.88 acres V
6. Acres in Wetlands: 0 acres
(Wetlands must be delineated & Sign -Off obtained from USACOE)
(Proposed Wetland Impacts Require Permits from Corps & DWQ)
7. Ownership Information From NC Secretary of State Web Site:
Rlal Cwporalion
8. Description of Development Proposal:
Thepurpose of this projecl is to consima a permanent dubhonse and amenity cenler to sense lbe golf course
along existing roadways, parking and ulililies. Also, I I residential villas are planned
9. Description of Adjacent Land Uses:
tvsidenlial and go ff i oun-e
10. Description of Existing Site & Topography:
The existing area where the facilities are to be placed has been built up approximately 6'4' rvilb
compacted elry and slopes ranging from 2% to 9%. The area drains toward an ex.fling pond .mnmled
will) a 4: I slope.
11. Previous or Existing Permits:
Yes
12. Tax parcel ID Number:
013 847 PC 230
13. Pre-1988 Built Upon Area, If Applicable:
N/fl
14. Discuss Phasing of the Project & Stormwater Facilities:
Project is proposed to be conslnrded in a single please
15. Discuss Proposed Waste Water Treatment & Water Supply:
IVailewalerTrealmeut and IValerSapply shall be provided by eaisling nearby mains.
16. Identify Historic Sites & Projects Being Funded With Public Monies:
Alone
17. Disclose Any/All Non -Compliance Issues with DENR Agencies:
No issuer cancenung !leis new Phase IA.
Stormwater Narrative Page t of 2

Stormwater Information
1. River Basin: Chowao
2. Stream Classification:
i. Name: Black IValout Suvp Index No.: 25-25 Class: C;NSIV Dist. from Site: ft.
ii. Name: Salmon Creek Index No.: 25-24 Class: CNSII%Dist. from Site: ft.
iii. Name: Index No.: Class: Dist. from Site: ft.
3. Identify Whether the Stormwater Design is High Density or Low Density, Commercial
or Residential, State Stormwater or NPDES Phase II, Address Vested Rights When
Applicable; Identify Pockets of High Density:
High Deosity Design. Coaslal County
4. Proposed Total'% Impervious Surface: /
34.71 %, ✓
5. Number of Proposed Treatment Measures, Type(s) of Collection System:
There aiv 4 Bioreten lim collectioo cells.
6. Will All Built Upon Area Be Collected:
YES
7. Identify Whether or Not the Project Has Buffer Requirements & Whether or Not
Development Is Proposed Within A Buffer:
N/A
8. Discuss Coastal Management AEC's When Applicable:
N111
9. Discuss Off -Site Runoff:
N/fl
10. Discuss Whether Road Construction Across Other property Is Necessary To Access
This Project:
Access to the site will be from the oewly constnicted Clubhouse Drive.
11. If An On -Site Evaluation Of The Soils Has Been Done, Discuss Infiltration Rates,
Seasonal High Water Table, etc., and Include Date Of Site Evaluation (This Is
Required For Infiltration Projects):
Oo-Site Evaluatim is atlaheul see Soil Report.
Additional Comments
Stonnwater Narrative Page 2 of 2

EXPRESS Project Narrative
Innsbrook Golf Course & Residential Development
JAN 1 1 2010 Innsbrook Clubhouse Villas and Amenity Center
NC DENR Merry Hill, Bertie County, North Carolina
Revised December 30, 2009
Project Description
This project was previously approved for 5 duplex villas and tennis courts with 4.8 acres of land
disturbance known as Phase 1A. The project has been modified to include 11 single family
residential villas and a proposed new clubhouse and amenity center that has been relocated
from it's previously approved location directly across clubhouse drive which will cause an
additional 1 acre of disturbance. Total new land disturbing will now be approximately 5.88 acres.
This particular phase in the development was formerly part of the Phase 1, but due to the area
being classified as a high -density area, was removed from Phase 1 and is now a new phase of
development, Phase 1A. All work will be completed within the existing property limits. The
development property is located south of US 17 at the mouth of the Chowan River east of the
Merry Hill, NC (see attached vicinity map and detailed plans).
Site Description
The existing property is vegetated with native and volunteer grasses, agricultural, and wooded
areas. Slopes within the project area are generally in the range of 2-4% while there are some
steeper areas in the vicinity of the pond's edge. Primary drainage for the project will be via
existing ditches eventually leading to Black Walnut Swamp (C;NSW).
Adjacent Property
Land use in the vicinity of the project is residential/agricultural. All work will be completed within
the limits of the existing property.
Soils
The dominant soil types in the development consist of Craven -Lenoir and Goldsboro -Norfolk -
Craven on the ridges and level areas respectively. Generally, these soils consist of a loamy
surface layer with loamy or clayey subsoil. Drainage ranges from well drained to poorly drained
with hydrologic soil groupings from B to D.

Previous and Current Permittin
To the south of Phase 1A is Phase 1 residential which has been permitted for Erosion Control
and Stormwater Management and has completed construction entering the development along
Innsbrook Blvd. connecting to the Phase 1A area and beyond. To the east and west is the golf
course which is part of the Phase 1 portion of the development and has been permitted for
Erosion Control and Stormwater Management and has completed construction leading up to the
Phase 1A area. To the north of Phase 1A is Phase 2 residential which has been permitted for
Erosion Control and Stormwater Management and will be commencing with construction in the
near future. Phase 1A that was permitted for Erosion Control under the project name of
Innsbrook Clubhouse Villas Permit No Bertie-2009-002 should be voided and replaced once it
is approved.
This phase of development has a current stormwater permit #SW7080320. The requested
modification of the existing permit will add the construction of the 11 villas, clubhouse and
amenity center and a new erosion control permit to permit 5.88 acres for the revised area.
Stormwater Management
This project will be developed under the high -density requirements for coastal counties and is
currently in the process of being permitted.
This project proposes to convey stormwater primarily through overland flow and swales and
having the outlets enter four bioretention areas. The modification of the permit will cause two of
the previously approved basins DA-3 and DA-7 to increase in size due to additional impervious
surface are but are in the same location. The other two basins DA-5 and DA-6 have been
moved slightly and have been updated to include the most recent impervious surface area.
Sheet flow from yards or golf course areas will be treated via the use of the 30 foot vegetated
buffer. This buffer will surround all proposed ponds and existing surface waters adjacent to the
property. The buffer will be planted and maintained with native and volunteer vegetation. No
built upon areas will be allowed within the delineated buffer area.
The bioretention areas are designed in accordance with the latest revisions to the BMP manual
Calculations:
Sizing of the storm drain piping and erosion control measures was done to the 10 yr.
design event.