20150321 Ver 1_401 Application_20150315

McADaMs
LETTER OF TRANSMITTAL
To Ms Karen Higgins Date
NC Division of Water Resources
401 & Buffer Permitting Unit
a
512 N Salisbury Street
Raleigh, North Carolina 27604
Re Neuse Buffer Authorization Job No
Wake Technical Community College
I am sending you the following item(s)
KrMMAR % UV UV 3 0 2015
March 27, 2015
FED EX
WCC -14000
COPIES
DATE
NO.
DESCRIPTION
3
Buffer Authorization
These are transmitted as checked below
❑ As requested
® For approval
❑ For review and comment
arks
Copy to
❑ For your use
Signed
George Buchholz, RE , PWS
Environmental Project Manager
Raleigh- Durham Charlotte
2905 Meridian Parkway 11301 Carmel Commons Blvd , Suite 111
Durham, North Carolina 27713 Charlotte, North Carolina 28226
(919) 361 -5000 (704) 527 -0800
Designing Tomorrow's Infrastructure & Communities
McAdamsCoxom

J McADAMS
McAdamsCocom Designing Tomorrow's Infrastructure & Communities
DGC�CCMI
March 27, 2015
A R302015
Ms. Karen Higgins
DEN R • WATER RESOURQ
NC Division of Water Resources 401 8 BUFFER PERMITTIN
401 & Buffer Permitting Unit
512 N. Salisbury Street
Raleigh, North Carolina 27604
Re: Neuse Buffer Authorization
Wake Technical Community College
Main Campus — Parking Lot /Repaving Projects
Wake County, North Carolina
WCC -14000
Dear Ms. Higgins:
On behalf of Wake Technical Community College, we are applying for a
Neuse River Riparian Buffer Authorization for permanent impacts to Zone 1
and Zone 2 of the Neuse Buffer associated with the proposed improvements to
the parking lot located within the main campus and repaving of Parking Lots
S and P, construction of stormwater management facilities, construction of a
new wooden pedestrian bridge connecting Parking Lot S to Parking Lot P, and
the establishment of a 20 foot permanently maintained sanitary sewer
easement. The proposed project is located on the Wake Technical
Community College main campus at 9101 Fayetteville Road, Raleigh, North
Carolina, which is approximately 103 acres in size. More specifically,
Parking Lot S (PIN Numbers: 0689819439 and 0689804752) is located on the
east side of campus and Parking Lot P (PIN Numbers: 0689608986 and
0689608627) is located on the southwest side of campus. Both Parking Lot S
and P are existing gravel parking lots and are separated by an unnamed
tributary to Mills Branch and associated forested areas. The project site is
located within the Neuse River Basin (HUC 03020201) and the unnamed
tributaries to Mills Branch have a NCDWR Water Quality Classification of
Class C and Nutrient Sensitive Waters The proposed project involves an
expenditure of public funds and requires the preparation of an Environmental
Assessment document pursuant to the requirements of the State
The John R McAdams
Company, Inc
Environmental
Environmental Policy ct SEPA An Environmental Assessment document
the
being submitted t State Clearing House to be finalized. It is anticipated
a Finding of No Significant Impact (FONSI) conclusion will be rendered and
Raleigh / Durham, NC
the preparation of an Environmental Impact Statement will not be required.
2905 Meridian Parkway
Durham, North Carolina 27713
(919) 361 -5000
Charlotte, NC
11301 Carmel Commons Blvd
Suite 111
Charlotte North Carolina 28226
(704) 527 -0800
McAdamsCocom Designing Tomorrow's Infrastructure & Communities

Ms. Karen Higgins
Wake Technical Community College
Main Campus — Parking Lot/Repaving Projects
March 27, 2015
Page 2 of 7
The following items are included in this Neuse Buffer Authorization
application package:
• Signed Agent Authorization
• NCDWR Neuse Buffer Determination (NBRRO #14 -402;
November 19, 2014)
• Fig. 1 - USGS Quad — Lake Wheeler
•
Fig. 2 - Wake County Soil Survey (Sheet 85)
• Fig. 3.1 - Existing Conditions Map
• Fig. 3.2 - Existing Conditions Map with Aerial
•
Fig. 4 - Overall Impact Map
• Inset 1 — Proposed BMP Outfall ( Stormwater Wetland); 1" _
50'
• Inset 2 — Proposed Pedestrian Bridge; 1" = 50'
• Inset 3A — Proposed Sewer Easement; 1" = 50'
• Inset 3B — Proposed Sewer Easement; 1" = 50'
• Inset 4 — Proposed BMP Outfall (Wet Detention); 1" = 50'
• Inset 5 — Existing Storm Outfall; 1" = 50'
• Stormwater Impact Analysis and Preliminary Design of
Stormwater Management Facilities summary
• Wetland Supplement Form SWMF A (Proposed Stormwater
Wetland)
• Level Spreader Supplement Form SWMF A (Proposed
Stormwater Wetland)
• Wetland Supplement Form SWMF B (Proposed Wet
Detention)
• Level Spreader Supplement Form SWMF B (Proposed Wet
Detention)
STREAM MAPPING: McAdams Company, Inc. conducted a jurisdictional
wetland and stream delineation of the Wake Technical Community College
main campus. Based on the delineation, the Wake Technical Community
College main campus contains unnamed tributaries to Mills Branch, which
discharge into the Neuse River (HUC 03020201). The unnamed tributaries to
Mills Branch have a NCDWR Water Quality Classification of Class C and
Nutrient Sensitive Waters. The main campus contains a total of 2,704 linear
feet of perennial and intermittent jurisdictional streams. No jurisdictional
wetlands were identified on the main campus. The U.S. Army Corps of
Engineers conducted a jurisdictional wetland/stream field determination on
November 20, 2014 (SAW- 2014- 02128); however, the Jurisdictional
�Determmation Plat has not been signed yet. Based on the delineation, there
WCC -14000

Ms. Karen Higgins
Wake Technical Community College
Main Campus — Parking Lot /Repaving Projects
March 27, 2015
Page 3 of 7
are stream features located on the main campus that are subject to the Neuse
River Buffer Rules. NCDWR conducted an field determination on November
5, 2014, and on November 19, 2014 provided a Neuse Buffer Determination
(NBRRO #14 -402, attached).
PROJECT LOCATION /HABITAT: The areas are termed as Parking Lot S
(PIN Numbers: 0689819439 and 0689804752) and Parking Lot P (PIN
Numbers: 0689608986 and 0689608627). Parking Lot S is an existing gravel
parking area located on the east side of the main campus, adjacent to the west
of a railroad corridor for Norfolk Southern Corporation. There is a fenced
area located in the northeast corner of Parking Lot S that is used for storage
and contains a shed. Approximately 40 percent of Parking Lot S contains
forested areas. Parking Lot P is an existing gravel parking area located on the
southwest side of the main campus at the southeast corner of the intersection
of Tech Road and U.S. Highway 401. Approximately 80 percent of Parking
Lot P contains forested areas. Parking Lots S and P are separated by an
unnamed tributary to Mills Branch and associated forested areas. The third
and last area is located within the western side of the main campus near
Fayetteville Road. This area is primarily forested and is located at the
southeast corner of the intersection of Old McCullers Road and U.S. Highway
401.
The riparian buffer is mostly forested and consists of mainly loblolly pine
(Pinus taeda) and oak species (Quercus sp.), in addition to red maple (Acer
rubrum) and tulip poplar (Liriodendron tukpifera) with an understory of
Chinese privet (Ligustrum sinense) and greenbr>ar (Smilax rotundifolia). The
project site contains an unnamed tributaries to Mills Branch, which discharge
into the Neuse River (HUC 03020201) The unnamed tributaries to Mills
Branch have a NCDWR Water Quality Classification of Class C and Nutrient
Sensitive Waters. The main campus contains a total of 2,704 linear feet of
perennial and intermittent jurisdictional streams. No jurisdictional wetlands
were identified on the main campus. Stream features "A" (perennial) and "D"
(intermittent) are subject to the Neuse River Buffer Rules.
Land use within the vicinity of the project site is a mix of institutional, multi-
family, light industrial- office, railroad, and forested areas.
PROPOSED PROJECT /IMPACTS: The proposed project involves
improvements to the parking lot located within the main campus and repaving
of Parking Lots S and P. As a result of the proposed new development
activities, stormwater management facilities will be constructed to treat
WCC -14000

Ms. Karen Higgins
Wake Technical Community College
Main Campus — Parking Lot /Repaving Projects
March 27, 2015
Page 4 of 7
stormwater runoff The stormwater management facilities and associated
level spreaders will be located outside the Neuse River Buffers, however, the
proposed bypass channels associated with stormwater management facilities
will impact Neuse River Buffers (Insets 1 and 4). There is a proposed
retaining wall to be constructed associated with Parking Lot S (Inset 313). The
retaining wall will be located outside the Neuse River Buffers. There are
proposed temporary clearing and grading activities within Zone 2 of the
Neuse River Buffers associated with the installation of the retaining wall.
Located within the central section of Parking Lot S is an existing storm
drainage outfall. The outlet point of the existing storm drainage outfall is
proposed to be extended. The proposed extension of the storm drainage
outfall outlet will not impact Neuse River Buffers (Inset 5). A new wooden
pedestrian bridge connecting Parking Lot S to Parking Lot P is proposed to be
constructed through the Neuse River Buffers (Inset 2). The proposed
pedestrian bridge will be an aerial crossing of the unnamed tributary to Mills
Branch at a near perpendicular angle and mimic the two existing pedestrian
bridges located to the north of the proposed location. The Town of Fuquay-
Vanna is recommending the addition of a 20 foot permanently maintained
sanitary sewer easement to accommodate future sanitary sewer extensions that
are aligned north to south and paralleling the unnamed tributary to Mills
Branch along the west side of the stream feature. The proposed 20 foot
permanently maintained sanitary sewer easement will be aligned only within
Zone 2 of the Neuse River Buffers and avoid impacts to Zone 1 of the Neuse
River Buffers (Insets 3A and 313). Typical construction equipment will be
used for the project, such as a long -arm track -hoe, front end loader, and bush
hog for the initial clearing.
WCC -14000

Ms Karen Higgins
Wake Technical Community College
Main Campus — Parking Lot /Repaving Projects
March 27, 2015
Page 5 of 7
TOTAL BUFFER IMPACTS:
Buffer Impact Type
Zone I impact
Zone 2 impact
(square feet)
(square feet)
Bypass Channel;
Outfall (Stormwater
528
269
Wetland
Greenway /Hiking
2,129
1,233
Trail
Sanitary Sewer
0
13,001
Easement
Grading
0
332
Bypass Channel;
Outfall (Wet
523
67
Detention
TOTAL
3,180
14,902
AVOIDANCE and MINIMIZATION: Currently, Parking Lots S and P are
existing gravel parking lots, in which, there are currently no stormwater
management facilities utilized to treat stormwater runoff. The proposed
repaving improvements of Parking Lots S and P will include the construction
of a two stormwater management facilities to treat future runoff from the
upgraded Parking Lots S and P. The stormwater management facilities and
associated level spreaders will be located outside the Neuse River Buffers;
and thus, avoid impacting the buffers. However, there will be minimal
impacts to Neuse River Buffers the associated with the proposed bypass
channels of each of the stormwater management facilities. Located within the
central section of Parking Lot S is an existing storm drainage outfall. The
outlet point of the existing storm drainage outfall is proposed to be extended.
The proposed extension of the storm drainage outfall outlet will avoid
impacting Neuse River Buffers. Inset 5 is provided to show a closer view of
this proposed activity. There is a proposed retaining wall to be constructed
associated with Parking Lot S. The retaining wall will be located outside the
Neuse River Buffers; and thus, avoid impacting the buffers. Minimal impacts
within Zone 2 of the Neuse River Buffers associated with the installation of
the retaining wall are proposed in the form of temporary clearing and grading
activities A new wooden pedestrian bridge connecting Parking Lot S to
Parking Lot P is proposed to be constructed through the Neuse River Buffers.
The proposed pedestrian bridge will be an aerial crossing of the unnamed
WCC -14000

Ms. Karen Higgins
Wake Technical Community College
Main Campus — Parking Lot /Repaving Projects
March 27, 2015
Page 6 of 7
tributary to Mills Branch at a near perpendicular angle and mimic the two
existing pedestrian bridges located to the north of the proposed location.
Although there are unavoidable impacts associated with the pedestrian bridge,
the impacts to the Neuse River Buffers have been minimized by crossing at a
near perpendicular angle. In addition, the stream feature (Mills Branch) from
which the Neuse River Buffers are established is avoided. The Town of
Fuquay -Varina is recommending the addition of a 20 foot permanently
maintained sanitary sewer easement to accommodate future sanitary sewer
extensions that are aligned north to south and paralleling the unnamed
tributary to Mills Branch along the west side of the stream feature. The
proposed 20 foot permanently maintained sanitary sewer easement will be
aligned only within Zone 2 of the Neuse River Buffers and avoid impacts to
Zone 1 of the Neuse River Buffers.
DIFFUSE FLOW: Per to the Wake County Stormwater Design Tool, the
stormwater wetland, wet pond, level spreaders and vegetative filter strips will
provide the nitrogen removal that is necessary to meet the 10 lbs /ac /yr
maximum nitrogen export rate, prior to an offset payment, for the proposed
improvements.
STORMWATER MANAGEMENT: Four points of analysis (POA) were
utilized to capture the on- and off -site improvements associated with this
project. Detention and treatment are being provided at POA 1 using two
stormwater management facilities, one wet pond and one wetland. The
increase at POA 2 and POA 3 is less than 10 %, therefore no detention is being
provided at those POA's. There is a net decrease at POA 4 for the 1 -year
storm. Per the Wake County regulations, the peak stormwater runoff leaving
the site for the 1 -year, 24 -hr storm is no greater for post - development
conditions than pre - development conditions at all POA's unless the post -
development runoff exceeds the pre- development by less than 10 %. It should
be noted that the analysis provided is more conservative than the Wake
County Hybrid Stormwater Tool, however the tool is included for reference
See the appropriate sections for more information.
It should be noted that due to the large amount of existing impervious onsite,
the apportioning method was utilized to analyze the total nitrogen loads,
which takes into account the significant amount of existing impervious onsite
The simple method used in the Wake County Hybrid Stormwater Tool was
also included for reference.
WCC -14000

Ms. Karen Higgins
Wake Technical Community College
Main Campus —Parking Lot/Repaving Projects
March 27, 2015
Page 7 of 7
If the development on this tract is built as proposed within this report, then the
requirements set forth in the Wake County stormwater ordinance will be met
with the proposed stormwater management plan. However, modifications to
the proposed development may require that this analysis be revised. Some
modifications that would require this analysis to be revised include:
1. The proposed site impervious surface exceeds the amount accounted
for in this report.
2 The post - development watershed breaks change significantly from
those used to prepare this report.
The above modifications may result in the assumptions within this report
becoming invalid. The computations within this report will need to be
revisited if any of the above conditions become apparent as development of
the proposed site moves forward.
MITIGATION: All buffer impacts are deemed "Allowable" or "Exempt"
under the Neuse Raver Riparian Buffer Rules — Table of Uses. Therefore, no
mitigation is proposed.
Consideration of this project is greatly appreciated. If you should have any
questions or require additional information, please do not hesitate to contact
me at (919) 287 -0890.
Sincerely,
The John R.M McAdams Company, Inc.
George Buchholz REM, PWS
Environmental Consultant
Enclosures
WCC -14000

Div�islon of Water Resources
State of North Carolina
Department of Environment and Natural Resources
Division of Water Resources
15A NCAC 02B .0233 (8)(b),.0243 (8)(b), .0250 (11)(b), .0259 (8)(b),.0267 (11)(c), .0607 (e)(2) — Buffer Authorization
FORM, BA 10 -2013
Riparian Buffer Authorization Form 2 n 1 R
A.
Applicant Information
1.
Project Information
la
Name of project
Wake Technical Community College — Main campus — Parking Lot/Repaving
Projects
1 b
County
Wake
1c
Nearest municipality
Raleigh
1d
Subdivision name
le
Is the project located in any of North Carolina's
twenty coastal counties If yes, answer 1f below
El Yes ®No
1f
Is the project located within a NC Division of Coastal
Management Area of Environmental Concern (AEC)?
❑ Yes ® No
2.
Owner Information
2a
Name on Recorded Deed
Wake Technical COMM College TRST of,
2b
Deed Book and Page No
DB 009699, PG 01601
2c Map Book and Page No
(include a copy of the recorded
map that indicates when the lot
was created)
2d
Responsible Party
(for Corporations)
Wake Technical Community College (attn Mr Ganon Bunn)
2e
Street address
9101 Fayetteville Road
2f
City, state, zip
Raleigh, NC, 27603
2g
Telephone no
(919)866 -5534
2h
Fax no
21
Email address
3.
Applicant Information (if different from owner)
3a
Applicant is
❑ Agent ❑ Other, specify
3b
Name
3c
Business name
(if applicable)
3d
Street address
3e
City, state, zip
3f
Telephone no
3g
Fax no
3h
Email address
MAR 3 0 2015
FORM' BA 10 -2013 1 DENR - WATER RESOURCES I Page 1 of 9

INTERNAL DRAFT- NOT FOR PUBLIC USE
Section A. Applicant Information, continued
4.
Agent/Consultant Information (if applicable)
4a
Name
George Buchholz, Environmental Cons ultant/Prolect Manager
4b
Business name
(if applicable)
The John R McAdams Company, Inc
4c
Street address
2905 Meridian Parkway
4d
City, state, zip
Durham, NC, 27713
4e
Telephone no
(919)287 -0890
4f
Fax no
(919)361 -2269
4g
Email address
buchholz @mcadamsco com
FORM SSGP3080 8 -13 Page 2 of 9

B.
Project Information and Prior Project History
1.
Property Identification
1a
Property identification no (tax PIN or parcel ID)
0689804752, 0689819439
lb
Site coordinates (in decimal degrees)
Latitude 35 660833
Longitude -78 704167
1c
Property size
+ 103 acres
2.
Surface Waters
2a
Name of nearest body of water to proposed project
Mills Branch
2b
Water Quality Classification of nearest receiving water
C,NSW
2c
River basin
Neuse 03020201
3.
Project Description
3a
Describe the existing conditions on the site and the general land use in the vicinity of the project at the time of this
application
The areas are termed as Parking Lot S (PIN Numbers 0689819439 and 0689804752) and Parking Lot P (PIN
Numbers 0689608986 and 0689608627) Parking Lot S is an existing gravel parking area located on the east
side of the main campus, adjacent to the west of a railroad corridor for Norfolk Southern Corporation There is a
fenced area located in the northeast corner of Parking Lot S that is used for storage and contains a shed
Approximately 40 percent of Parking Lot S contains forested areas Parking Lot P is an existing gravel parking
area located on the southwest side of the main campus at the southeast corner of the intersection of Tech Road
and U S Highway 401 Approximately 80 percent of Parking Lot P contains forested areas Parking Lots S and P
are separated by an unnamed tributary to Mills Branch and associated forested areas The third and last area is
located within the western side of the main campus near Fayetteville Road This area is primarily forested and is
located at the southeast corner of the intersection of Old McCullers Road and U S Highway 401
3b
Attach an 8 '/2 x 11 excerpt from the most recent version of the USGS topographic map indicating the location of
the site See attached Figure 1
3c
Attach an 8'/2 x 11 excerpt from the most recent version of the published County NRCS Soil Survey Map
depicting the project site See attached Figure 2
3d
List the total estimated linear feet of all existing streams (intermittent and perennial) on the property
2,704 LF
3e
Explain the purpose of the proposed project
Proposed project consists of the construction of parking lot areas, pedestrian bridge, landscaping, utility
improvements, and stormwater management facilities As a result, Neuse River Buffer impacts are proposed
3f
Describe the overall project in detail, including the type of equipment to be used
The proposed project involves improvements to the parking lot located within the main campus and repaving of
Parking Lots S and P As a result of the proposed new development activities, stormwater management facilities
will be constructed to treat stormwater runoff The stormwater management facilities and associated level
spreaders will be located outside the Neuse River Buffers, however, the proposed bypass channels associated
with stormwater management facilities will impact Neuse River Buffers (Insets 1 and 4) There is a proposed
retaining wall to be constructed associated with Parking Lot S (Inset 3B) The retaining wall will be located
outside the Neuse River Buffers There are proposed temporary clearing and grading activities within Zone 2 of
the Neuse River Buffers associated with the installation of the retaining wall Located within the central section of
Parking Lot S is an existing storm drainage outfall The outlet point of the existing storm drainage outfall is
proposed to be extended The proposed extension of the storm drainage outfall outlet will not impact Neuse River
Buffers (Inset 5) A new wooden pedestrian bridge connecting Parking Lot S to Parking Lot P is proposed to be
constructed through the Neuse River Buffers (Inset 2) The proposed pedestrian bridge will be an aerial crossing
of the unnamed tributary to Mills Branch at a near perpendicular angle and mimic the two existing pedestrian
bridges located to the north of the proposed location The Town of Fuquay -Vanna is recommending the addition
of a 20 foot permanently maintained sanitary sewer easement to accommodate future sanitary sewer extensions
that are aligned north to south and paralleling the unnamed tributary to Mills Branch along the west side of the
stream feature The proposed 20 foot permanently maintained sanitary sewer easement will be aligned only
within Zone 2 of the Neuse River Buffers and avoid impacts to Zone 1 of the Neuse River Buffers (Insets 3A and
3B) Typical construction equipment will be used for the project, such as a long -arm track -hoe, front end loader,
and bush hog for the initial clearing
FORM BA 10 -2013 Page 3 of 9

B. Project Information and Prior Project History
4.
Jurisdictional Determinations
4a
Have jurisdictional wetland or stream determinations by the
® Yes ❑ No ❑ Unknown
Corps or State been requested or obtained for this property/
Comments
project (including all prior phases) in the past?
4b
If yes, who delineated the jurisdictional areas?
Agency/ Consultant Company McAdams
Name (if known)
Company, Inc
Other
4c
If yes, list the dates of the Corps jurisdictional determinations or State determinations and attach documentation
- USACE field concurrence (SAW- 2014 - 02128, November 20, 2014, JD Map not yet signed)
- NCDWR Neuse Buffer Determination (NBRO #14 -402, November
19, 2014)
5.
Project History
5a
Have permits or certifications been requested or obtained for this
❑ Yes ❑ No ® Unknown
project (including all prior phases) in the past?
5b
If yes, explain and detail according to "help file" instructions
6.
Future Project Plans
6a
Is this a phased projects
❑ Yes ® No
6b
If yes, explain
FORM SSGP3080 8 -13 Page 4 of 9

C. Proposed Impacts Inventory
1. Buffer Impacts
1a Project is in which protected basing
® Neuse ❑ Tar - Pamlico ❑ Catawba
❑ Randleman ❑ Jordan ❑ Goose Creek
1 b Individually list all buffer impacts below If any impacts require mitigation, then you MUST fill out Section D of this
form
Buffer impact
Reason for
Type of impact
Stream name
Buffer
Zone 1
Zone 2
number —
impact
(exempt, allowable,
mitigation
impact
impact
Permanent (P)
allowable w/ mitigation)
required?
(sq ft)
(sq ft)
or Temporary T
B1 ®P ❑ T
Bypass Channel,
Allowable
Unnamed
❑ Yes ® No
528
269
Outfall
Tributary to Mills
(Stormwater
Branch
Wetland)
B2 ® P ❑ T
Greenway /Hiking
Allowable
Unnamed
❑ Yes ® No
2,129
1,233
Trail
Tributary to Mills
Branch
B3 ®P ❑ T
Sanitary Sewer
Allowable
Unnamed
❑ Yes ® No
0
13,001
Easement
Tributary to Mills
Branch
B4 ❑ P ® T
Grading
Exempt
Unnamed
❑ Yes ® No
0
332
Tributary to Mills
Branch
65 ® P ❑ T
Bypass Channel,
Allowable
Unnamed
❑ Yes ® No
523
67
Outfall (Wet
Tributary to Mills
Detention)
Branch
B6 ❑ P ❑ T
❑ Yes ❑ No
Total
buffer impacts
3,180
14,902
1 c Comments
FORM BA 10 -2013 Page 5 of 9

C. Impact Justification and Mitigation, continued
D. Impact Justification and Mitigation
1. Avoidance and Minimization
1a Specifically describe measures taken to avoid or minimize the proposed impacts in designing project
- Currently, Parking Lots S and P are existing gravel parking lots, in which, there are currently no stormwater
management facilities utilized to treat stormwater runoff The proposed repaving improvements of Parking
Lots S and P will include the construction of a two stormwater management facilities to treat future runoff from
the upgraded Parking Lots S and P The stormwater management facilities and associated level spreaders
will be located outside the Neuse River Buffers, and thus, avoid impacting the buffers However, there will be
minimal impacts to Neuse River Buffers the associated with the proposed bypass channels of each of the
stormwater management facilities
- Located within the central section of Parking Lot S is an existing storm drainage outfall The outlet point of
the existing storm drainage outfall is proposed to be extended The proposed extension of the storm
drainage outfall outlet will avoid impacting Neuse River Buffers Inset 5 is provided to show a closer view of
this proposed activity
- There is a proposed retaining wall to be constructed associated with Parking Lot S The retaining wall will be
located outside the Neuse River Buffers, and thus, avoid impacting the buffers Minimal impacts within Zone
2 of the Neuse River Buffers associated with the installation of the retaining wall are proposed in the form of
temporary clearing and grading activities
- A new wooden pedestrian bridge connecting Parking Lot S to Parking Lot P is proposed to be constructed
through the Neuse River Buffers The proposed pedestrian bridge will be an aerial crossing of the unnamed
tributary to Mills Branch at a near perpendicular angle and mimic the two existing pedestrian bridges located
to the north of the proposed location Although there are unavoidable impacts associated with the pedestrian
bridge, the impacts to the Neuse River Buffers have been minimized by crossing at a near perpendicular
angle In addition, the stream feature (Mills Branch) from which the Neuse River Buffers are established is
avoided
- The Town of Fuquay -Vanna is recommending the addition of a 20 foot permanently maintained sanitary
sewer easement to accommodate future sanitary sewer extensions that are aligned north to south and
paralleling the unnamed tributary to Mills Branch along the west side of the stream feature The proposed 20
foot permanently maintained sanitary sewer easement will be aligned only within Zone 2 of the Neuse River
Buffers and avoid impacts to Zone 1 of the Neuse River Buffers
1 b Specifically describe measures taken to avoid or minimize the proposed impacts through construction techniques
Proper sedimentation and erosion control methods will be utilized during all phases of construction and
installation All work will take place during dry conditions and can be facilitated from high, non - jurisdictional,
stable ground The contractor shall install silt fence, inlet protection, sediment traps, diversion ditches, tree
protection, clearing only as necessary to install devices All erosion and sediment control measures will be
checked for stability and operation following every runoff producing rainfall, but in no case less than once every
week Any needed repairs will be made immediately to maintain all measures designed An erosion control
inspections report is required and will be kept by the owner's representative Temporary seeding and permanent
seeding plans are included to restore impacted areas The project will meet all relative requirements of Best
Management Practices and Engineered Stormwater Control Structures as outlined through State and Local
Stormwater Rules.
FORM SSGP3080 8 -13 Page 6 of 9

C. Impact Justification and Mitigation, continued
2.
Buffer Mitigation
2a
Will the project result in an impact within a protected riparian buffer that requires buffer
mitigation?
❑ Yes ® No
2b
If yes, then identify the square feet of impact to each zone of the riparian buffer that requires mitigation and
calculate the amount of mitigation required in the table below
Zone
Reason for impact
Total impact
(square feet
Multiplier
Required mitigation
(square feet
Zone 1
3 (2 for Catawba)
Zone 2
1 5
Total buffer mitigation
required:
2c
If buffer mitigation is required, is payment to a
mitigation bank or NC EEP proposed?
❑ Yes ❑ No
2d
If yes, attach the acceptance letter from the mitigation bank or NC EEP
2e
If no, then discuss what type of mitigation is proposed
2f
Comments
FORM SSGP3080 8 -13 Page 7 of 9

E. Diffuse Flow Plan
All buffer impacts and high ground impacts require diffuse flow or other form of ® Diffuse flow
stormwater treatment Include a plan that fully documents how diffuse flow will be ® Other BMP
maintained If a Level Spreader is proposed, attach a Level Spreader Supplement Form
If due to site constraints, a BMP other than a level spreader is proposed, please provide a
plan for stormwater treatment as outlined in Chapter 8 of the NC Stormwater BMP
Manual and attach a BMP Supplement Form
See attached Stormwater Impact Analysis and Preliminary Design of Stormwater
Management Facilities summary
Release Rate Management
Four points of analysis (POA) were utilized to capture the on- and off -site improvements
associated with this project Detention and treatment are being provided at POA 1 using two
stormwater management facilities, one wet pond and one wetland The increase at POA 2
and POA 3 is less than 10 %, therefore no detention is being provided at those POA's There
is a net decrease at POA 4 for the 1 -year storm Per the Wake County regulations, the peak
stormwater runoff leaving the site for the 1 -year, 24 -hr storm is no greater for post -
development conditions than pre - development conditions at all POA's unless the post -
development runoff exceeds the pre - development by less than 10% It should be noted that
the analysis provided is more conservative than the Wake County Hybrid Stormwater Tool,
however the tool is included for reference See the appropriate sections for more information
Water Quality Management
Per to the Wake County Stormwater Design Tool, the stormwater wetland, wet pond, level
spreaders and vegetative filter strips will provide the nitrogen removal that is necessary to
meet the 10 Ibs /ac /yr maximum nitrogen export rate, prior to an offset payment, for the
proposed improvements
It should be noted that due to the large amount of existing impervious onsite, the apportioning
method was utilized to analyze the total nitrogen loads, which takes into account the
significant amount of existing impervious onsite The simple method used in the Wake County
Hybrid Stormwater Tool was also included for reference
Conclusion
If the development on this tract is built as proposed within this report, then the requirements
set forth in the Wake County stormwater ordinance will be met with the proposed stormwater
management plan However, modifications to the proposed development may require that this
analysis be revised Some modifications that would require this analysis to be revised include
1 The proposed site impervious surface exceeds the amount accounted for in this
report
2 The post - development watershed breaks change significantly from those used to
prepare this report
The above modifications may result in the assumptions within this report becoming invalid
The computations within this report will need to be revisited if any of the above conditions
become apparent as development of the proposed site moves forward
FORM BA 10 -2013 Page 8 of 9

F.
Supplementary Information
by First Class Mail via the US Postal Service
1.
Environmental Documentation
OR NC DWR, Transportation Permitting Unit
la
Does the project Involve an expenditure of public (federal /state /local) funds or the use of
® Yes ❑ No
Raleigh, NC 27604
public (federal /state) land?
For all other projects sent by delivery service
lb
If you answered "yes" to the above, does the project require preparation of an
® Yes ❑ No
OR Karen Higgins
environmental document pursuant to the requirements of the National or State (North
NCDWR — 401 & Buffer Permitting Unit
1650 Mall Service Center
Carolina) Environmental Policy Act (NEPA/SEPA)?
Raleigh, NC 27699 - 1650
1c
If you answered "yes" to the above, has the document been finalized by the State
❑ Yes ® No
Clearing House? (If so, attach a copy of the NEPA or SEPA final approval letter)
Comments An Environmental Assessment document is being submitted to the State
Clearing House to be finalized It Is anticipated a Finding of No Significant Impact
(FONSI) conclusion will be rendered and the preparation of an Environmental Impact
Statement will not be required
2.
Violations
2a
Is the site In violation of DWR Wetland Rules (15A NCAC 02H 0500), Isolated Wetland
❑ Yes ® No
Rules (15A NCAC 02H 1300), DWR Surface Water or Wetland Standards, or Riparian
Buffer Rules (15A NCAC 02B 0200)?
2b
Is this an after - the -fact permit application?
❑ Yes ® No
2c
If you answered "yes" to one or both of the above questions, provide an explanation of the violations)
01
Applicant/Agent's Printed Name Applicant/Agent's SIg re Dat
(Agent's signature is valid only if an authorization letter from the applicant is provided )
Send 3 complete sets of this form and accompanying documents to the following
For government transportation projects sent
For government transportation projects sent
by First Class Mail via the US Postal Service
by delivery service (UPS, FedEx, etc)
NC DWR, Transportation Permitting Unit
OR NC DWR, Transportation Permitting Unit
1650 Mail Service Center
512 N Salisbury Street
Raleigh, NC 27699 - 1650
Raleigh, NC 27604
For all other projects sent by First Class Mail
For all other projects sent by delivery service
via the US Postal Service
(UPS, FedEx, etc)
Karen Higgins
OR Karen Higgins
NCDWR — 401 & Buffer Permitting Unit
NCDWR — 401 & Buffer Permitting Unit
1650 Mall Service Center
512 N Salisbury Street
Raleigh, NC 27699 - 1650
Raleigh, NC 27604
FORM SSGP3080 8 -13 Page 9 of 9

-a
WADA NI S
AGENT AUTHORIZATION FORM
All Blanks To Be Filled In By The CurrentPronerty Owner
Name. Garion Bunn
Address: 9101 Fayetteville Road, Raleigh, NC 27603 -5696 _
Phone: [phone]
Project Name/Description: Main
Project Number: WCC -14000
Date. 10/20/14
U S. Army Corps of Engineers
Attn: David Schaeffer
Raleigh Regulatory Field Office
3331 Heritage Trade Drive, Suite 105
Wake Forest, NC 27587
ing Lot / Repaving Projects
Rc: Wetlands Related Consulting and Permitting
To Whom It May Concern.
Brandon Finch /George Buchholz
I hereby designate and authorize The John R. McAdams Company, Inc to act in my behalf as
my agent in the processing of permit applications, to furnish upon request supplemental
information in support of applications, etc from this day forward.
I, the undersigned, a duly authorized owner of record of the property /properties identified herein,
do authorize representatives of the Wilmington District, U S. Army Corps of Engineers (Corps)
to enter upon the property herein described for the purpose of conducting on -site investigation
and issuing a determination associated with Water of the U.S. subject to Federal jurisdiction
under Section 404 of the Clean Water Act and /or Section 10 of the Rivers and Harbors Act of
1899.
This notification supersedes any previous correspondence concerning the agent for this project.
NOTICE: This authorization, for liability and professional courtesy reasons, is valid only
for government officials to enter the property when accompanied by The John R.
McAdams Company, Inc. staff.
Garion Bunn
Print Property Owner
Raleigh- Durham Charlotte
2905 Meridian Parkway 11301 Carmel Commons Blvd, Suite 111
Durham, North Carolina 27713 Charlotte, North Carolina
(919) 361 -5000 (704) 527 -0800
Designing Tomorrow's Infrastructure & Communities
McAdamsCo.com

NCDENR
North Carolina Department of Environment and Natural Resources
Pat McCrory John E. Skvarla, III
Governor Secretary
November 19, 2014
Wake Technical Community College
Mr. Garion Bunn
9101 Fayetteville Rd
Raleigh, NC 27603
Subject: Buffer Determination
NBRRO# 14 -402
Wake County
Determination Type-
Buffer Call
Isolated or EIP Call
® Neuse (15A NCAC 2B 0233)
Start@
❑ Tar - Pamlico (15A NCAC 2B 0259)
❑ Ephemeral /Intermittent /Perennial Determination
❑ Jordan (15A NCAC 26 0267)
❑ Isolated Wetland Determination
Project Name: Wake Tech Main Campus
Location/Directions Property is located on Wake Tech Main Campus Wake County, NC.
Subject Stream: Mills Branch
Determination Date: November 5, 2014 Staff: James Graham
Feature /Flag
Not
Subject
To
Buffers
Subject
To
Buffers
E /I /P*
Start@
Stop@
Soil
Survey
USCS
Topo
A
X
P
X
X
B
Off property
X
C
X
Non - existent
X
D
X
I
McAdams Flag
X
E
X
I
Pond A
X
Non - existent
X
* al - Ephemeral /intermittent/Perennial
Dne
�CqthCarolina
atura!!{,
North Carolina Division of Water Resources 1628 Mail Service Center Raleigh, NC 27699 -1628 Phone [phone]
Internet www newaterouality org Location 3800 Barrett Drive Raleigh, NC 27609 Fax [phone]
An Equal Opportunity /Affirmative Action Employer — 50% Recycled/1 0% Post Consumer Paper

Wake Tech Main Campus
Wake County
November 12, 2014
Page 2 of 2
Explanation- The feature(s) listed above has or have been located on the Soil Survey of Wake County, North
Carolina or the most recent copy of the USGS Topographic map at a 1:24,000 scale Each feature that is checked
"Not Subject" has been determined not to be a stream or is not present on the property. Features that are checked
"Subject" have been located on the property and possess characteristics that qualify it to be a stream. There may be
other streams located on your property that do not show up on the maps referenced above but, still may be
considered jurisdictional according to the US Army Corps of Engineers and /or to the Division of Water Resources
(DWR)
This on -site determination shall expire five (5) years from the date of this letter. Landowners or affected parties that
dispute a determination made by the DWR or Delegated Local Authority may request a determination by the
Director. An appeal request must be made within sixty (60) days of date of this letter or from the date the affected
party (including downstream and /or adjacent owners) is notified of this letter. A request for a determination by the
Director shall be referred to the Director in writing c/o Karen Higgins, DWR WeBSCaPe Unit, 1650 Mail Service
Center, Raleigh, NC 27699.
This determination is final and binding unless, as detailed-above, you ask for a hearing or appeal within sixty (60)
days.
The owner /future owners should notify the Division of Water Resources (including any other Local, State, and
Federal Agencies) of this decision concerning any future correspondences regarding the subject property (stated
above). This project may require a Section 404/401 Permit for the proposed activity. Any inquiries should be
directed to the Division of Water Resources (Central Office) at (919 )-807 -6300, and the US Army Corp of Engineers
(Raleigh Regulatory Field Office) at (919) -554 -4884.
If you have questions regarding this determination, please feel free to contact James Graham at (919) 791 -4256.
Respe fully,
�9
Danny Smit , Supervisor
Water Quality Section
Raleigh Regional Office
cc: RRO /SWP File Copy
George Buchholz
McAdams Company
2905 Meridian Parkway
Durham, NC 27713

Feature D
Subject to buffers
Intermittent
Q C =11-1
Feature E
Intermittent
Not Subject to
Buffers
Feature B
Off property
=TY"
Feature C and Pond A
Not existing
UA1
Feature A
Perennial Subject to buffers

MUZO
El
XiA
11 l
Amo(o
!i
•., •-� ���N- rte_. ,.._
DTIFIGp
v iueD
A ,•.1

N WAKE TECHNICAL COMMUNITY COLLEGE - MAIN CAMPUS
PRE - CONSTRUCTION NOTIFICATION !mIj
FIGURE 2. SOIL SURVEY EXHIBIT
0 250 500 1,000 PROJECT #: WCC -14000
Feet 1VI C ADAM S
1 inch =500 feet WAKE COUNTY, NORTH CAROLINA

LEGEND:
EXISTING JURISDICTIONAL
STREAM FEATURES
/ ..� - .
Sm
VA
IONIC.,
.� , 1
l�
TIMAZ
r,
.1
fr , th� _ •r
I T F Rp �N,Ir.N RO. IJJ
WAKE
TECHNICAL Q
F TECH FWD CDmYINFI' _
4y 99
t
4
mm U'
a.
, t
1 , � ill I�/ \ _ __'J /" ' J ", I " c U � ��•xyy
EXISTING STORMWATER
BMP
N � Z
r
l
1
• � r " t
F-
r p U to
0 a
r I / \ (� it '' • r' i g _0 00 O
I o
GRAPHIC SCALE z
F �
300 0 150 300 600 y L
z a U <
a � o
X
1 inch = 300 ft. emu ADAMS

LEGEND:
EXISTING JURISDICTIONAL ° { /�( _� ,� ' { LDILfC
STREAM FEATURES 4' , ,!'• �� �' -f _\ cui
NEUSE STREAM BUFFER ,x> d N �t ;� �' f ' r ` 77 R0,4D
{
�u�n�u�urau�nra PROJECT SITE: 102.9 AC.
v ,!' •.; � i -r R� A Iii` �-,''�i+ J r ". - -'u i (f-•'._ -., � "� t � 1- i i
INTERMITTENT JURISDICTIONAL
I�/ '' � p�•� � STREAM FEATURE l `� III
'D'; LENGTH 812' ,�,t, ,
�
'✓. - \
fC. 0 t. to l- J_ Fri ",� .
' 'i %f /; f'i'r �'•j € ��_ �111h .�Y- yl \,\ \y.'' - ;` i.� ,.i`,.t�nc ". -i �� /� /�,'
;,,'ri` i •�'• �= I�
y ' �: r` . ' WAKE TECHNICAL 1 �
7 COMMUNITY COLLEGE Wit. , \\ ✓ v I
/MAIN CAMPUS
(MAIN
NEUSE STREAM BUFFER J
f - -�;
IM
�';. $ie C.. ''✓ I �I r `, j�-/� ; _ '�` ., '' fr /,(' L `�`�.4 f/ qJ/ ! r �i 'l
PERENNIAL JURISDICTIONAL STREAM'
FEATURE 'A'; LENGTH 1827'
, f -
err.;f \,'i'•�'� ''. N, r„`�ti`" �'l �-- �' ` -:!I�� yJ,jal /i7 :,, li (`" y. j' ��� �• �f
=��-" i� / ! - '� ' �� � •-�._� _.� - -� ;,--� ' ��! ; —�,'� ���(!:, fir. � �1 , . i'lc; p� , .
l i'�/rh�•,�,jt-�_� r.� \ .�rLrn �`._= it =�. -C� �. }J / J lift �• %'�'ri l�ll ,��' �4N "(1 1 C ' / "' i
<� ll \,,t , ~��� �~` �D. n l J✓t . ��L -. , �- � r f'r j y + �S 1) ' � f1 [. f �
` INTERMITTENT JURISDICTIONAL
STREAM FEATURE 'E'` LENGTH 65'
—
v�; 1�•�('
11 -��� 1• i �,; /; 1in�. f" lr
lt
r '4
TJ. l
i I
r .
r '
o J+�
RD
o �
;r MWE
TECHNWk
F TE ROAD Cg1YUNfiY rz
4r rF
• ICR l i mL'!r
NTS
v
� l
JJJ
GRAPHIC SCALE
300 0 150 300 600
1 inch = 300 ft.
1�2 gRs 1
d�c7 of
NZ_
i211
� V
0 Z
Ov
U�
0
O � C7
1
a CC
-9i
Uzi
O < ,n
O
O O O
o N
I
U o II oN
0
3 O
Z
U �
� McAnwMs
r
1 ii
TJ. l
i I
r .
r '
o J+�
RD
o �
;r MWE
TECHNWk
F TE ROAD Cg1YUNfiY rz
4r rF
• ICR l i mL'!r
NTS
v
� l
JJJ
GRAPHIC SCALE
300 0 150 300 600
1 inch = 300 ft.
1�2 gRs 1
d�c7 of
NZ_
i211
� V
0 Z
Ov
U�
0
O � C7
1
a CC
-9i
Uzi
O < ,n
O
O O O
o N
I
U o II oN
0
3 O
Z
U �
� McAnwMs

LEGEND:
EXISTING JURISDICTIONAL
STREAM FEATURES
- - NEUSE STREAM BUFFER
..... PROJECT SITE: 102.9 AC.
r
PROPOSED PARKING LOT
A RENOVATION
PROPOSED PARKING LOT
B EXPANSION
L
I�
e
1
H`
t 1
04-x; `\: OL
D MC CUL
(SR 27 79) RCAD
IP
INTERMITTENT JURISDICTIONAL
STREAM FEATURE 'D'; LENGTH 812' c!
WAKE TECHNICAL
COMMUNITY COLLEGEt.
(MAIN CAMPUS)
* j NEUSE STREAM BUFFER
y{l n
a j
PERENNIAL JURISDICTIONAL STREAM':
FEATURE 'A'; LENGTH 1827'
�4�
_A; JURISDICTIONAL
STREAM FEATURE 'E'; LENGTH 65' '
1; I
PROPOSED PARKING LOT
P EXPANSION
PROPOSED WET
DETENTION POND
INSET #4 - PROPOSED
BMP OUTFALL
I
y
t
4q
OEM) � ®r,, mot; I
INSET #1 - PROPOSED
BMP OUTFALL
t, �171
- PROPOSED STORMWATER
WETLAND
GRAPHIC SCALE
300 0 150 300 600
1 inch = 300 ft.
w
h 1 2
a� I i !I
z
� A
W
C7
0
Uz
oa
�30
U
° ,n
O a ° p
o
N
U v II N
o °
z
F �
U �
'�I MCADA AS
NOTES:
1
1-
WAKE COUNTY PIN NUMBERS: 0689718778, 0689708713,
0689819439, 0689804752
2.
HUC: UPPER NEUSE - 03020201
3.
LAT: 35.650833 LONG: - 78.704167
4.
DWR STREAM CLASSIFICATION (MILLS BRANCH -
27- 43- 15 -7): C; NSW
5.
USACE FIELD CONCURRENCE (SAW- 2014 - 02128; NOVEMBER
20, 2014; JD MAP NOT YET SIGNED)
6.
NCDWR NEUSE BUFFER DETERMINATION (NBRRO #14 -402;
'!` <
NOVEMBER 19, 2014 )
7.
THERE ARE NO PROPOSED STREAM AND / OR WETLAND
1�
i
IMPACTS.
,t4
IMPACTS:
±i
NEUSE RIVER ZONE 1 IMPACTS: 3,180 SF (0.07 AC)
NEUSE RIVER ZONE 2 IMPACTS: 14,902 SF (0.34 AC)
OEM) � ®r,, mot; I
INSET #1 - PROPOSED
BMP OUTFALL
t, �171
- PROPOSED STORMWATER
WETLAND
GRAPHIC SCALE
300 0 150 300 600
1 inch = 300 ft.
w
h 1 2
a� I i !I
z
� A
W
C7
0
Uz
oa
�30
U
° ,n
O a ° p
o
N
U v II N
o °
z
F �
U �
'�I MCADA AS

I I /
SEE INSET #3
PROPOSED BUFFER IMPACT TO
J / STOP SHORT OF EXISTING STREAM
CHANNEL (I.E. NO STREAM
IMPACTS)
I A/
"9 PROPOSED RIP -RAP
BYPASS CHANNEL
�P PO
I
/07 / I
I
PROPOSED LIMITS OF
DISTURBANCE (TYP.) I �,
PERENNIAL
JURISDICTIONAL STREAM / / / PROPOSED LEVEL
1I�
A / SPREADER / FILTER /
/STRIP
J ► I r I r �� r� l� ,� l ,� o �/, / l
PROPOSED STORMWATER WETLAND LEGEND:
IMPACT AREA 1:
EXISTING JURISDICTIONAL
NEUSE RIVER BUFFER — ZONE 1 STREAM FEATURES
528 SF (0.01 AC.)
NEUSE STREAM BUFFER
NEUSE RIVER BUFFER — ZONE 2 GRAPHIC SCALE
269 SF (0.01 AC.)
40 0 20 40 80
1 inch = 40 ft.
x
„ -14 0 Stom wetlan d Pwmittin BMP-G eenwo o-Sewer Eassemen ttCurrwit Drawi
n
WCC14000- IMACT.dw 3/26/2015 9:18:59 AM, 3Buchholz, M.GrAeodr a me
PROJECT NO. WCC- 1 4000 WAKE TECHNICAL q� WADAM
FILENAME: WCC14000— IMPACT ' OOWA Y, fffr_ CO COLT LG L hm r
Parkway SCALE: 1 40, Durham, North C aohna 27o
7c1� 3
DATE: � AI C{S — W- T� COUNTY, NC (800) TLAcenee No: C-09
03-20 -2015 INSE r l: PROPOSED BMP OUTFALL MCADAMS

I I SEE INSET #3 r
-,/PERENNIAL
JURISDICTIONAL STREAM
/ = r PROPOSED WOODEN
— DECK PEDESTRIAN
IN BRIDGE
SEE INSET #313 /
/1
b
s 1
PROPOSED RETAINING
WALL (TYPO
/ 301
PROPOSED PEDESTRIAN BRIDGE,
\ AND ASSOCIATED FOOTERS, TO BE
\ gyp" / + LOCATED OUTSIDE TOP OF BANK
4, \ I ^ / 9 (I.E. NO STREAM IMPACTS) /
PROPOSED LIMITS OF
DISTURBANCE (TYP.)
PROPOSED PEDESTRIAN BRIDGE LEGEND:
IMPACT AREA 2:
EXISTING JURISDICTIONAL
NEUSE RIVER BUFFER - ZONE 1 STREAM FEATURES
2,129 SF (0.05 AC.)
NEUSE STREAM BUFFER
NEUSE RIVER BUFFER - ZONE 2 GRAPHIC SCALE
1,233 SF (0.03 AC.) 50 0 25 50 100
1 inch = 50 ft.
L PROJECT NO. WCC —� 4000 WEE �y TE • �.�'V ,C� ,
L= Luii% Viii'i '�
�N'�` WCC74000- IMPACT ���•���
CO COLLEGE MW SCALE: 1„ = 50'
MAIN CAMPUS -WAKE COUNTY, NC »,�' "� 19
r�, M e � C IJcea�e Pa: C-0789
(p DATE: 03 -20 -201 S INSET #2: PROPOSED PEDESTRIAN BRIDGE +•`�-++•`v ��) 733-550 - cA

PROPOSED SEWER EASEMENT I 1 ► 1 ,I I r /I
IMPACT AREA 3:
NEUSE RIVER BUFFER — ZONE 1
0 SF (0.00 AC.)
NEUSE RIVER BUFFER (SEWER IMPACTS
AC.)) — ZONE 2 — 13.001 SF (0.30 \ \` \I /� -,6 /
LEGEND: P I r PROPOSED 20 —FT
TA rr , 1 SEWER EASEMENT /
EXISTING JURISDICTIONAL / \ / Lp,T I P \ I , (TMP)
STREAM FEATURES I
NEUSE STREAM BUFFER
/ 1 I
SEE INSET #4
�
ENTI.O
A�
,Ile
r1�� /,
/ — — _ -/— III I i I II I / , M I J , 1 30 20
Z-
doo
, /, //,
U7
SEE INSET #1
PERENNIAL / / / / / I / r PROPOSED LIMITS F
JURISDICTIONAL STREAM / / / / / / J r DISTURBANCE (TYP
'A'
�
ii�il� /r 1, /� „� //, II ►� 1 �/ / J l i� / /// � I( I c l i l t \,
/ 1
1 PROPOSED 20 —FT
SEWER EASEMENT
/ I (TYP.)
/ I
; J 1
GRAPHIC SCALE
/ ' 50 0 25 50 100
/ 1 inch = 50 ft.
X: Pro' to WCC WCC -14000 Storm Wetland Permit tin BMP— Greenwa Trail —Sewer Easement Current Drowln a WCC14000— IMPACT.dw , 3/26/2015 9:20:36 AM, Buchholz. George
L PROJECT NO. WCC. -1 400 �� %� ��j TECHNICAL T
FILENAME: WCC14000— IMPACT •�L1 [ 11/” V�CAL CO COLLEGE �J C'�PAW.MM""'
SCALE: 1" = 50' MAIN CAMPUS - WAKE COUNTY, NC hom> �rt-v
Durh.m. North tyram,. 17713
I.Arssim No.: DATE: INSET #3A: PROPOSED SEWER EASEMENT A ., t �
03 -20 -2015 MCADAMS leool7ssae+e.��,a.�

PROPOSED SEWER EASEMENT
IMPACT AREA 3: 2 ' ,� /I� \I �\ \•'�/ ,/ �// �// / /^ ,'
ED 0.00 AC.)FFER -ZONE 1
O /f
NEUSE RIVER BUFFER (SEWER IMPACTS r
ONLY) - ZONE 2 -13,001 SF (0.30
PROPOSED CLEARING
GRADING /� w ; ; PROPOSED 20 —FT
I a SEWER EASEMENT
IMPACT AREA 4: �// / '� �, (TYP.) / /�� \ ,-- --
NEUSE RIVER BUFFER - ZONE 1 / / / / / / /-,J
0 SF (0.00 AC.)
NEUSE RIVER BUFFER (SEWER IMPACTS
ONLY) - ZONE 2 = 332 SF (0.00 AC.)
LEGEND:
EXISTING JURISDICTIONAL
STREAM FEATURES
- - -- NEUSE STREAM BUFFER
F(RO , /I / SEE INSET #2 \
LO?7
y
�6 \
/A
ZONE 2 BUFFER
IMPACTS; PROPOSED
CLEARING AND !i
-GRADING ASSOCIATED / J
' ,< WITH RETAINING WALL
INSTALLATION;
RETAINING WALL TO
J / / /CBE LOCATED OUTSIDE
BUFFER /
ds
TAE
—P ORN Ic
f
PROPOSED LIMITS OF
DISTURBANCE (TYP.) \ I
r
SEE INSET #4 PERENNIAL
JURISDICTIONAL STREAM / J
it �\\ �� / / / /% /I\ /� �/ 1 j � /�1J11 "� ✓I / \) \\ \`\
' / � // J (� ✓ / //, � / 1 1 ` I 1 \ / I ` / /STOR 11M�i�� �ATA� R
f/
,. )
PROPOSED 20 —FT
o / SEWER EASEMENT / % / (/ / ( ` r /
GRAPHIC SCALE
` / % / / (/ // J 1 11 ( f / 50 0 25 50 100
�/ J / / SEE INSET #1
/l 1 inch = 50 ft.
X: ro to WCC WCC -14000 Storm Wetland Permittin BMP- Greenwa Troil -Sewer Easement Current Drowin a WCC14000- IMPACT.dw , 3/26/2015 9:21:10 AM, Buchholz George
PROJECT NO. WCC-14000 "
y WCC14000- IMPACT WAKE TECIMCAL CO TITY COLLEGE J � 0%w.m°"'�
FILENAME:
.a
SALE, 1 w = 50' MAIN CAMPUS - WAKE COUNTY, NC 7806
Durham, North CazoNoa 71713
1Vo DATE: INSET #3B: PROPOSED SEWER FASEMF1ITI' ceool 7 No.:
�+eAa: a.aom
03 -20 -2015 MCADAMS

— 1 SEE INSET #3
I II / PROPO D-
PET D TENTIOI�L�
/POND,
_ _ lv PROPOSED RIP —RAP / 20' I 'r
7 I I i� BYPASS CHANNEL' / 30
PROPOSED BUFFER IMPACT TO
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- - -- NEUSE STREAM BUFFER
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67 SF (0.01 AC.) 40 0 20 40 80
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WAKE TECHNICAL COMMUNITY COLLEGE - MAIN CAMPUS
Stormwater Impact Analysis & Preliminary Design of Stormwater Management Facilities
General Description & Background
Located at the northwest corner of the intersection of Fayetteville Road and Old McCullers Road
in Raleigh, North Carolina is the development known as Wake Technical Community College -
Main Campus Proposed development on the 102 9 -acre site will consist of the construction of
parking lot areas, landscaping, utility improvements, and stormwater management facilities
The proposed development is located within the Neuse River basin and will be subject to the
stormwater management requirements set forth in Article 9 of the Wake County Unified
Development Ordinance (UDO) Per Wake County regulations, stormwater management on this
site shall address two primary issues (1) peak discharge rates and (2) water quality management
An Approved Stormwater Management Plan —shall be required for all proposed new
development disturbing one acre or more for residential development, and one half acre or more
for commercial, industrial, multifamily residential, local government property and other non-
residential uses [15A NCAC 02B 0235]; Neuse Rules apply County -wide [Wake County]
Stormwater Permit — is required for all development and redevelopment unless exempt
pursuant to the Unified Development ordinance A permit may only be issued subsequent to a
properly submitted, reviewed and approved stormwater management plan and permit application
[Wake County]
Nitrogen Load- contributed by the proposed new development activity shall not exceed the unit
area mass loading rate for nitrogen of 3 6 of pounds per acre per year nitrogen loading shall be
calculated using the Wake County Hybrid Stormwater Tool Nitrogen loading is calculated using
the Simple Method consistently with the State's Accounting Tool [15A NCAC 02B 0235 (4)(a)],
[Wake County]
Compliance Other Stormwater Regulations - proposed new development subject to NPDES,
water supply, Swift Creek Land Management Plan and other state and local mandated regulations
shall comply with those regulations in addition to the other requirement of 15A NCAC
02B 0277 [ 15A NCAC 02B 0277(4)(d)]
Volume Management — shall be required for RESIDENTIAL regular subdivisions when the
post development curve number exceeds the pre development curve number using the Wake
County Hybrid Stormwater Tool. Minor subdivisions have the option of limiting impervious to
15 %. 5 Runoff Treatment — Stormwater systems shall be designed to control and treat at a
minimum, the runoff generated from all surfaces by one inch of rainfall The treatment volume
shall be drawn down pursuant to each practice as provided in the July 2007 version of the
Stormwater Best Management Practices Manual published by DENR or other technically
equivalent standards acceptable to DENR Item 5 Runoff Treatment above [ 15A NCAC
02B 0277(4)(e)]
Peak Flow — new development shall not result in a net increase in peak flow leaving the site
from the pre development conditions for the 1 yr -24hr storm Treatment volume shall be drawn
down pursuant to standards specific to each practice as provided the NC Stormwater Best
Management Practices Manual or technically equivalent standards acceptable to NCDENR Peak
flow control for the 1 -year, 24- hour storm is required when the net increase in peak flow
between pre- and post - development exceeds 10% [15A NCAC 02B 0235 (4)(a)]

Replacement or Expansion w /No Net Increase in BUA — proposed development that would
replace or expand structures or improvements that existed as of July 2001, and that would not
result in a net increase in built -upon area shall not be required to meet nitrogen loading targets
except to the extent that the developer shall provide stormwater control at least equal to the
previous development
Replacement or Expansion with Net Increase in BUA proposed development that would
replace or expand structures or improvements and that would result in a net increase in built -
upon area shall meet the target of 3 6 lbs /ac /yr for the entire site OR achieve a 30% reduction in
nitrogen loading and no increase in phosphorus loading
Riparian Buffers — new development shall comply with the riparian buffer protection
requirements of 15A NCAC 02B 0233 and 0242 or subsequent amendments or replacements to
those requirements [ 15A NCAC 02B 0235]
Nutrient Offset Option- Developers shall have the option of offsetting part of their nitrogen
load by funding offsite management measures by making payment to the NC Ecosystem
Enhancement Program or to another seller of offset credits approved by the Division or may
implement other offset measures contingent upon approval by the Division Prior to accessing the
Ecosystem Enhancement Program (EEP) Nutrient Offset Program, all applicants are now
required by law to comply with Session Law 2009 -337 An Act to Promote the Use of
Compensatory Mitigation Banks and also with SL 2011 -343 Please refer to DENR's
Implementation Policy for more detailed guidance However, before using offset payments, the
development must attain, at a minimum, a nitrogen export that does not exceed 6
pounds /acre /year for residential development and 10 pounds /acre /year for commercial or
industrial development [15A NCAC 02B 0235 (4)(a)]
Stormwater Improvements — The developer shall complete all stormwater improvements
(drainage culverts, BMPs, et al ) prior to CO or record plat OR shall post a performance
guarantee The developer shall submit a plan to ensure maintenance, enforcement and
compliance of Best Management Practices (BMPs) for the life of the new development [Wake
County]
Plan Submittal — preliminary and construction plans shall be submitted along with the Wake
County Hybrid Stormwater Tool and stormwater submittal checklist, Presubmittal meetings shall
be scheduled through the Planning Department
This report contains calculations detailing the expected stormwater impacts as a result of the
proposed development along with preliminary design of the stormwater management facilities
that will be used to mitigate the impacts Please refer to the appropriate section of this report for
additional information
Calculation MethodoloEv
• Rainfall data for the Raleigh, NC region is from NOAA Atlas 14 This data describes a
depth - duration- frequency (DDF) table describing rainfall depth versus time for varying
return periods in the Raleigh, NC area These rainfall depths are input into the
meteorological model within PondPack for peak flow rate calculations Please reference
the rainfall data section within this report for additional information
• Using maps contained within the Wake County Soil Surveys, the on -site soils were
determined to be from hydrologic soil group (HSG) `A', `B', and `C' soils Since the
method chosen to compute both pre- and post - development peak flow rates and runoff

volumes is dependent upon the soil type, care was taken when selecting the appropriate
Soil Conservation Number (SCS CN)
• A composite SCS Curve Number was calculated for both the pre- and post- development
condition for each subbasin using SCS curve numbers and land cover conditions Land
cover conditions for the on -site pre - development conditions were taken from surveyed
information collected by Avioimage Mapping Services, Inc Land cover conditions for the
onsite post - development condition were taken from the proposed subdivision plan
• The post - development times of concentration for all on -site subbasms draining to existing
or proposed stormwater management facilities were assumed to be 5 minutes due to the
high amount of impervious onsite
• The existing on -site topography used in the analysis is from two different sources The
existing topography generally located within the property boundary is from field survey
by Avioimage Mapping Services, Inc The remainder of the topography is from Wake
County GIS data. Please refer to the pre- and post - development watershed maps for more
information.
• PondPack Version V8i was used in determining the pre- & post - development peak flow
rates for the 1 -, 2 -, 10 -, and 100 -year storm events
• Final water quality sizing calculations for the proposed stormwater management facility
were performed in accordance with the N C. Stormwater Best Management Practices
manual (NCDENR October 2007)
• Nitrogen export calculations for the project were computed using the City of Raleigh
Apportioning Method Due to the amount of existing impervious onsite, this method was
used to "assign" the proposed open space to either existing or new impervious surfaces
Since the proposed site is institutional, the maximum allowable TN -export (before an
offset payment is allowed) is 3 60 lbs /ac /yr
Discussion of Results
Release Rate Management
Four points of analysis (POA) were utilized to capture the on- and off -site improvements
associated with this project. Detention and treatment are being provided at POA 1 using two
stormwater management facilities, one wet pond and one wetland The increase at POA 2 and
POA 3 is less than 10 %, therefore no detention is being provided at those POA's There is a net
decrease at POA 4 for the 1 -year storm Per the Wake County regulations, the peak stormwater
runoff leaving the site for the 1 -year, 24 -hr storm is no greater for post - development conditions
than pre - development conditions at all POA's unless the post - development runoff exceeds the
pre- development by less than 10% It should be noted that the analysis provided is more
conservative than the Wake County Hybrid Stormwater Tool, however the tool is included for
reference See the appropriate sections for more information.
Water Quality Management
Per to the Wake County Stormwater Design Tool, the stormwater wetland, wet pond, level
spreaders and vegetative filter strips will provide the nitrogen removal that is necessary to meet
the 10 lbs /ac /yr maximum nitrogen export rate, prior to an offset payment, for the proposed
improvements

It should be noted that due to the large amount of existing impervious onsite, the apportioning
method was utilized to analyze the total nitrogen loads, which takes into account the significant
amount of existing impervious onsrte The simple method used in the Wake County Hybrid
Stormwater Tool was also included for reference
Conclusion
If the development on this tract is built as proposed within this report, then the requirements set
forth in the Wake County stormwater ordinance will be met with the proposed stormwater
management plan However, modifications to the proposed development may require that this
analysis be revised Some modifications that would require this analysis to be revised include
1 The proposed site impervious surface exceeds the amount accounted for in this report
2 The post - development watershed breaks change significantly from those used to prepare
this report
The above modifications may result in the assumptions within this report becoming invalid The
computations within this report will need to be revisited if any of the above conditions become
apparent as development of the proposed site moves forward

A I OF W ATF9
O� QG
� v
TA r
WDENR
STORMWATER MANAGEMENT PERMIT APPLICATION FORM
401 CERTIFICATION APPLICATION FORM
WETLAND SUPPLEMENT
This form must be filled out, printed and submitted
The Required Items Checklist (Part Ill) must be printed, filled out and submitted along with all the required information
I PROJECT INFORMATION
Project name
Wake Tech -Main Campus
Contact name
Josh Allen, PE
Phone number
919 - 361 -5000
Date
March 27, 2015
Drainage area number
IJo SWMF A
II DESIGN INFORMATION
Site Characteristics
Drainage area
474,851 00 ftz
Impervious area
335,434 00 fe
Percent Impervious
706%%
Design rainfall depth
100 Inch
Peak Flow Calculations
1 -yr, 24 -hr rainfall depth
1 -yr, 24 -hr Intensity
Pre - development 1 -yr, 24 -hr runoff
Post - development 1 -yr, 24 -hr runoff
Pre /Post 1 -yr, 24 -hr peak control
Storage Volume- Non -SA Waters
Minimum required volume
Volume provided (temporary pool volume)
Storage Volume SA Waters Parameters
1 5" runoff volume
Pre - development 1 -yr, 24 -hr runoff volume
Post - development 1 -yr, 24 -hr runoff volume
Minimum volume required
Volume provided
Outlet Design
Depth of temporary pool /ponding depth (Dpl, ,$)
Drawdown time
Diameter of orifice
Coefficient of discharge (CID) used In orifice diameter
calculation
Driving head (Ho) used In the orifice diameter calculation
290 In
494 In /hr
11263 ft3 /sec
10427 ft'/sec
-836 ft3 /sec
27 136 10 ft3
177,120 25 ft3 OK
ft3
ft3
ft3
ft"
ft3
11 65 In
4 37 days
2 25 In
0 60 (unitless)
0 97 ft
OK
OK
Drawdown orifice diameter may be Insufficient Please provide
adequate supporting calculations
OK
Form SW401- Wetland -Rev 6- 11/16/09 Parts I and 11 Project Design Summary, Page 1 of 3

Surface Areas of Wetland Zones
Surface Area of Entire Wetland
27,143 00 ft2
Insufficient wetland surface area
Shallow Land
8,830 00 ft2
OK
The shallow land percentage is
33%%
Shallow Water
11,119 00 ft2
OK
The shallow water percentage Is
41%%
Deep Pool
360
Forebay portion of deep pool (pretreatment)
2,65400 ft2
Insufficient forebay area
The forebay surface area percentage Is
10%
Non - forebay portion of deep pool
2,821 00 ft2
OK
The non - forebay deep pool surface area percentage is
10% %
Total of wetland zone areas
25,424 00 ft2
Enter data Into the shaded cells in this section
Add or subtract the following area from the zones
-1,71900 ft2
More required if not planting herb and /or trees
Topographic Zone Elevations
6
More required if not planting herb and /or shrubs
Temporary Pool Elevation (TPE)
Shallow Land (top)
303 00 ft amsl
Permanent Pool Elevation (PPE)
Shallow Water /Deep Pool (top)
302 75 ft amsl
Shallow Water bottom
302 50 ft amsl
Most shallow point of deep pool's bottom
301 50 ft amsl
Deepest point of deep pool's bottom
300 00 ft amsi
Design must meet one of the following two options
This design meets Option #1,
Top of PPE is within 6" of SHWT, If yes
(Y or N)
SHWT (Seasonally High Water Table)
ft amsl
OK
This design meets Option #2,
Wetland has liner with permeability < 0 01 in /hr, If yes
(Y or N)
Depth of topsoil above Impermeable liner
in
Topographic Zone Depths
Temporary Pool
Shallow Land
3 00 in
OK
Permanent Pool
Shallow Water
3 00 in
Insufficient shallow water depth
Deep Pool (shallowest)
15 00 In
Insufficient deep pool depth
Deep Pool (deepest)
33 00 In
OK
Planting Plan
Are cattails Included In the planting plan?
N (Y or N)
OK
Number of Plants recommended In Shallow Water Area
Herbaceous (4 +cubic -Inch container)
2,800
Number of Plants recommended in Shallow Land Area
Herbaceous (4 +cubic -inch container), OR
2,250
Shrubs (1 gallon or larger), OR
360
Trees (3 gallon or larger) and Herbaceous (4+ cubic -inch)
45 and
1,800
Number of Plants provided in Shallow Water Area
Herbaceous (4 +cubic -inch container)
2,516
Higher density is required
Number of Plants provided in Shallow Land Area
Herbaceous (4 +cubic -inch container)
1 435
More required if not planting shrubs or trees
Shrubs (1 gallon or larger)
51
More required if not planting herb and /or trees
Trees (3 gallon or larger) and
6
More required if not planting herb and /or shrubs
Grass -like Herbaceous (4+ cubic -inch)
Form SW40 1 -Wetland-Rev 6- 11/16/09 Parts I and 11 Project Design Summary, Page 2 of 3

Additional Information
Can the design volume be contained?
Y
(Y or N)
OK
Does project drain to SA waters9 If yes,
N
(Y or N)
Excess volume must pass through filter
What is the length of the vegetated filter?
NIA ft
Are calculations for supporting the design volume provided in the
Y
(Y or N)
OK
application
Is BMP sized to handle all runoff from ultimate build -out9
Y
(Y or N)
OK
Is the BMP located in a recorded drainage easement with a
Y
(Y or N)
OK
recorded access easement to a public Right of Way (ROW)?
The length to width ratio is
186 1
OK
Approximate wetland length
245 00 ft
Approximate wetland width
132 00 ft
Approximate surface area using length and width provided
32,340
00 ft o
This approx surface area is within this number of square feet
f the entire wetland surface area reported above
Will the wetland be stabilized within 14 days of constructions
Y
(Y or N)
OK
Form SW401- Wetland -Rev 6- 11/16/09 Parts I and 11 Protect Design Summary, Page 3 of 3

AG"
O�pF WATfROG
r
NCDENR
T
STORMWATER MANAGEMENT
PERMIT APPLICATION FORM
401 CERTIFICATION APPLICATION FORM
LEVEL SPREADER - VEGETATED FILTER STRIP (LS -VFS) SUPPLEMENT
This form must be completely filled out, printed, initialed, and submitted
I PROJECT INFORMATION
Project name
Wake Tech -Main Campus
Contact name
Josh Allen
Phone number
919 361 5000
Date
March 27 2015
Drainage area number
1 To SWMF A
II DESIGN INFORMATION
The purpose of the LS -VFS
Buffer Rule Diffuse Flow
Stormwater enters LS -VFS from
A BMP
Type of VFS
Pick one
Explanation of any "Other" responses above
If Stormwater Enters the LS -VFS from the Drainage Area
Drainage area
ft, Do not complete this section of the form
Impervious surface area
rye Do not complete this section of the form
Percent impervious
% Do not complete this section of the form
Rational C coefficient
Do not complete this section of the form
Peak flow from the 1 in/hr storm
cfs Do not complete this section of the form
Time of concentration
min Do not complete this section of the form
Rainfall intensity, 10 yr storm
in/hr Do not complete this section of the form
Peak flow from the 10 -yr storm
cfs Do not complete this section of the form
Design storm
Pick one
Maximum amount of flow directed to the LS -VFS
cfs Do not complete this section of the form
Is a flow bypass system going to be used9
(Y or N) Do not complete this section of the form
Explanation of any "Other' responses above
If Stormwater Enters the LS -VFS from a BMP
Type of BMP Other Explained below
Peak discharge from the BMP during the design storm 019 cfs
Peak discharge from the BMP during the 10 -year storm 779 cfs
Maximum capacity of a 100 -foot long LS -VFS cfs
Peak flow directed to the LS -VFS 023 cfs
Is a flow bypass system going to be used9 Y (Y or N)
Explanation of any "Other" responses above Type of BMP Wetland
Form SW401 - LS -VFS - 29June2012 - Rev 10 page 1 of 3

LS -VFS Design
Forebay surface area
Depth of forebay at stormwater entry point
Depth of forebay at stormwater exit paint
Feet of level lip needed per cfs
Computed minimum length of the level lip needed
Length of level lip provided
Width of VFS
Elevation at downslope base of level lip
Elevation at the end of the VFS that is farthest from the LS
Slope (from level lip to the end of the VFS)
Are any draws present in the VFS?
Is there a collector swale at the end of the VFS?
Bypass System Design (if applicable)
Is a bypass system provided?
Is there an engineered flow splitting device?
Dimensions of the channel (see diagram below):
M
B
W
y (flow depth for 10 -year storm)
freeboard (during the 10 -year storm)
Peak velocity in the channel during the 10 -yr storm
Channel lining material
Does the bypass discharge through a wetland?
Does the channel enter the stream at an angle?
Explanation of any "Other" responses above
75 sq It No forebay is required.
12 in
12 in Depth is appropriate.
ft/cfs
ft
10 ft Level spreader is too short to handle the flow.
m
298.00 fmsl
fmsl
N (Y or N) OK
N (Y or N)
Y (Y or N)
N (Y or N)
ft
ft
ft
It
It
ft/sec
Pick one:
(Y or N)
(Y or N)
13-
--H
1 R r1
Form SW401 - LS -VFS - 29June2012 - Rev. 10 page 2 of 3

III: REQUIRED ITEMS' HECKLIST
EDIT 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
Requried Item
1 Plans (1" - 50' 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),
Forebay (if applicable),
High flow bypass system,
Maintenance access,
Proposed drainage easement and public right of way (ROW), and
Boundaries of drainage easement
2 Plan details (1 "= 30' or larger) for the level spreader showing
- Forebay (if applicable),
High flow bypass system,
One foot topo lines between the level lip and top of stream bank,
Proposed drainage easement, and
Design at ultimate build -out
3 Section view of the level spreader (1" = 20' or larger) showing
- Underdrain system (if applicable),
Level lip,
Upslope channel, and
Downslope filter fabric
4 Plan details of the flow splitting device and supporting calculations (if applicable)
5 A construction sequence that shows how the level spreader will be protected from
sediment until the entire drainage area is stabilized
6 If a non - engineered VFS is being used, then provide a photograph of the VFS showing
that no draws are present
7 The supporting calculations
8 A copy of the signed and notarized operation and maintenance (0 &M) agreement
Initials Page or plan sheet number and any notes
Form SW401 - LS -VFS - 29June2012 - Rev 10 page 3 of 3

Permit No
(to be provided by DWQ)
WATF9
NCDENR o
STORMWATER MANAGEMENT PERMIT APPLICATION FORM
401 CERTIFICATION APPLICATION FORM
WET DETENTION BASIN 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
Project name Wake Tech Main Campus
Contact person Josh Allen PE
Phone number 919 361 5000
Date 3/27+2015
Drainage area number 1- To SWMF B
II DESIGN INFORMATION
Site Characteristics
Drainage area
Impervious area, post - development
% Impervious
Design rainfall depth
Storage Volume Non-SA Waters
Minimum volume required
Volume provided
Storage Volume SA Waters
15" runoff volume
Pre - development 1 -yr, 24 -hr runoff
Post - development 1 -yr, 24 -hr runoff
Minimum volume required
Volume provided
Peak Flow Calculations
Is the pre /post control of the 1 yr 24hr storm peak flow required?
1 yr, 24 -hr rainfall depth
Rational C, pre - development
Rational C, post - development
Rainfall Intensity 1 -yr, 24 hr storm
Pre - development 1 -yr, 24 -hr peak flow
Post - development 1 -yr, 24 -hr peak flow
Pre /Post 1 -yr, 24 -hr peak flow control
Elevations
Temporary pool elevation
Permanent pool elevation
SHWT elevation (approx at the perm pool elevation)
Top of 1 Oft vegetated shelf elevation
Bottom of 1 Oft vegetated shelf elevation
Sediment cleanout, top elevation (bottom of pond)
Sediment cleanout, bottom elevation
Sediment storage provided
Is there additional volume stored above the state required temp pool9
Elevation of the top of the additional volume
528 213 ft2
299 220 ft2
5665 %
10 in
24 642 ft3
152 591 ft'
OK, volume provided is equal to or in excess of volume required
u%l
ft3
ft3
ft3
ft3
Y (Y or N)
2 9 in
(unitless)
(unitless)
4 94 In /hr OK
112 63 ft3 /sec
104 27 ft3 /sec
-8 36 ft3 /sec
306 00 fmsl
300 00 fmsl
fmsl
299 50 fmsl
300 50 fmsl Data not needed for calculation option #1, but OK if provided
296 00 fmsl
294 00 fmsl Data not needed for calculation option #1, but OK if provided
200ft
Y (Y or N)
306 0 fmsl OK
Form SW401 -Wet Detention Basin -Rev 9- 4/18/12 Parts I & 11 Design Summary, Page 1 of 3

Permit No
(to be provided by DWQ)
II DESIGN INFORMATION
Surface Areas
Volume, temporary pool
Area, temporary pool
28,881 ft2
Area REQUIRED, permanent pool
16,267 ft2
SAIDA ratio
3 OS ( unitless)
Area PROVIDED, permanent pool, Apes -pool
17,974 ft2 OK
Area, bottom of 10ft vegetated shelf, Abo shelf
13,359 ft'
Area, sediment cleanout, top elevation (bottom of pond), Abol-pond
6,232 ft2
Volumes
Volume, temporary pool
50,357 ft'
Insufficient Volume does not agree with data previously entered
Volume, permanent pool, Vp,.-p,l
62 443 ft'
OK
Volume, forebay (sum of forebays if more than one forebay)
12,086 ft'
OK
Forebay % of permanent pool volume
194% %
OK
SA/DA Table Data
1 5 1
OK
Design TSS removal
90 %
OK
Coastal SAIDA Table Used?
N (Y or N)
OK
Mountain /Piedmont SAIDA Table Used?
Y (Y or N)
OK
SAIDA ratio
308 (unitless)
OK
Average depth (used in SAIDA table)
Y (Y or N)
OK
Calculation option 1 used? (See Figure 10 -2b)
Y (Y or N)
Volume, permanent pool, UPerm Pool
62,443 ft3
Area provided, permanent pool, Apes, -Pool
17,974 f'
Average depth calculated
3 47 ft
OK
Average depth used in SAIDA, day, (Round to nearest 0 5ft)
3 5 ft
OK
Calculation option 2 used? (See Figure 10 2b)
N (Y or N)
Area provided, permanent pool, Apenyooi
17,974 ft2
Area, bottom of I Oft vegetated shelf, Abot -sheii
13,359 ft2
Area, sediment cleanout, top elevation (bottom of pond), Aboiyond
6,232 ft2
'Depth" (distance b/w bottom of 1Oft shelf and top of sediment)
450 ft
Average depth calculated
ft
Average depth used in SAIDA, day, (Round to down to nearest 0 5ft)
ft
Drawdown Calculations
Drawdown through onfice9
Y (Y or N)
Diameter of orifice (if circular)
275 in
Area of orifice (if- non - circular)
in
Coefficient of discharge (CD)
060 ( unitless)
Driving head (Ho)
1 15 ft
Drawdown through weir?
N (Y or N)
Weir type
(unitless)
Coefficient of discharge (C,,,)
(unitless)
Length of weir (L)
ft
Driving head (H)
It
Pre - development 1 -yr, 24 -hr peak flow
112 63 ft3 /sec
Post - development 1 -yr, 24 -hr peak flow
104 27 ft3 /sec
Storage volume discharge rate (through discharge orifice or weir)
014 ft3 /sec
Storage volume drawdown time
2 15 days
OK, draws down in 2 -5 days
Additional Information
Vegetated side slopes
3 1
OK
Vegetated shelf slope
10 1
OK
Vegetated shelf width
10 0 ft
OK
Length of flowpath to width ratio
3 1
OK
Length to width ratio
1 5 1
OK
Trash rack for overflow & onfice9
Y (Y or N)
OK
Freeboard provided
1 3 ft
OK
Vegetated filter provided9
Y (Y or N)
OK
Recorded drainage easement provided?
Y (Y or N)
OK
Capures all runoff at ultimate build -out?
Y (Y or N)
OK
Drain mechanism for maintenance or emergencies is
8" DIP with Valve
Form SW401 -Wet Detention Basin -Rev 94/18/12 Parts I & 11 Design Summary Page 2 of 3

Permit No
(to be provided by DWQ)
III. -REQUIRED ITEMS CHECKLIST Z ` ° °
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.
Plans (1" - 50' 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),
Basin dimensions,
Pretreatment system,
High flow bypass system,
Maintenance access,
Proposed drainage easement and public right of way (ROW),
Overflow device, and
Boundaries of drainage easement
Partial plan (1" = 30' or larger) and details for the wet detention basin showing
Outlet structure with trash rack or similar,
Maintenance access,
Permanent pool dimensions,
Forebay and main pond with hardened emergency spillway,
Basin cross - section,
Vegetation specification for planting shelf, and
Filter strip
3 Section view of the wet detention basin (1" = 20' or larger) showing
Side slopes, 31 or lower,
Pretreatment and treatment areas, and
Inlet and outlet structures
4 If the basin is used for sediment and erosion control during construction, clean out of the basin is specified
on the plans prior to use as a wet detention basin
5 A table of elevations, areas, Incremental volumes & accumulated volumes for overall pond and for forebay,
to verify volume provided
6 A construction sequence that shows how the wet detention basin will be protected from sediment until the
entire drainage area Is stabilized
7 The supporting calculations
8 A copy of the signed and notarized operation and maintenance (0 &M) agreement
9 A copy of the deed restrictions (If required)
10 A soils report that Is based upon an actual field Investigation, soil borings, and Infiltration tests County
soil maps are not an acceptable source of soils Information
Form SW401 -Wet Detention Basin -Rev 9- 4/18/12 Part III Required Items Checklist, Page 3 of 3

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STORMWATER MANAGEMENT PERMIT APPLICATION FORM
401 CERTIFICATION APPLICATION FORM
LEVEL SPREADER - VEGETATED FILTER STRIP
(LS -VFS) SUPPLEMENT
This form must be completely filled out, printed, initialed, and submitted
I PROJECT INFORMATION
Project name
Wake Tech Main Campus
Contact name
Josh Allen
Phone number
919- 361 -5000
Date
March 27 2015
Drainage area number
1 To SWMF B
II DESIGN INFORMATION
The purpose of the LS -VFS
Buffer Rule Diffuse Flow
Stormwater enters LS -VFS from
A BMP
Type of VFS
Pick one
Explanation of any "Other" responses above
If Stormwater Enters the LS -VFS from the Drainage Area
Drainage area
ft,
Do not complete this section of the form
Impervious surface area
fe
Do not complete this section of the form
Percent impervious
%
Do not complete this section of the form
Rational C coefficient
Do not complete this section of the form
Peak flow from the 1 in/hr storm
cfs
Do not complete this section of the form
Time of concentration
min
Do not complete this section of the form
Rainfall intensity, 10 -yr storm
in /hr
Do not complete this section of the form
Peak flow from the 10 -yr storm
cfs
Do not complete this section of the form
Design storm
Pick one
Maximum amount of flow directed to the LS -VFS
cfs
Do not complete this section of the form
Is a flow bypass system going to be used?
(Y or N)
Do not complete this section of the form
Explanation of any "Other" responses above
If Stormwater Enters the LS -VFS from a BMP
Type of BMP
Wet detention pond
Peak discharge from the BMP during the design storm
029 cfs
Peak discharge from the BMP during the 10 -year storm
118 cfs
Maximum capacity of a 100 -foot long LS -VFS
cfs
Peak flow directed to the LS -VFS
034 cfs
Is a flow bypass system going to be used?
(Y or N)
Explanation of any "Other" responses above
Form SW401 - LS -VFS - 29June2012 - Rev 10 page 1 of 3

LS -VFS Design
Forebay surface area
Depth of forebay at stormwater entry point
Depth of forebay at stormwater exit point
Feet of level lip needed per cfs
Computed minimum length of the level lip needed
Length of level lip provided
Width of VFS
Elevation at downslope base of level lip
Elevation at the end of the VFS that is farthest from the LS
Slope (from level lip to the end of the VFS)
Are any draws present in the VFS?
Is there a collector swale at the end of the VFS?
Bypass System Design (if applicable)
Is a bypass system provided?
Is there an engineered flow splitting device?
Dimensions of the channel (see diagram below):
M
B
W
y (flow depth for 10 -year storm)
freeboard (during the 10 -year storm)
Peak velocity in the channel during the 10 -yr storm
Channel lining material
Does the bypass discharge through a wetland?
Does the channel enter the stream at an angle?
Explanation of any "Other" responses above
75 sq ft
No forebay is required.
12 in
12 in
Depth is appropriate.
ft/cfs
ft
10 It
Level spreader is too short to handle the flow,
ft
fmsl
fmsl
N (Y or N)
OK
N (Y or N)
Y (Y or N)
N (Y or N)
ft
ft
ft
ft
ft/sec
Pick one:
(Y or N)
(Y or N1
r
1 � i
Form SW401 - LS -VFS - 29June2012 - Rev. 10 page 2 of 3

III: REQUIRED ITEMS CHECKLIST A a d
EDIT 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
Requned Item
1 Plans (1" - 50' 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),
Forebay (if applicable),
High flow bypass system,
Maintenance access,
Proposed drainage easement and public right of way (ROW), and
Boundaries of drainage easement
2 Plan details (1" = 30' or larger) for the level spreader showing
- Forebay (if applicable),
High flow bypass system,
One foot topo lines between the level lip and top of stream bank,
Proposed drainage easement, and
Design at ultimate build -out
3 Section view of the level spreader (1" = 20' or larger) showing
- Underdrain system (if applicable),
Level lip,
Upslope channel, and
Downslope filter fabric
4 Plan details of the flow splitting device and supporting calculations (if applicable)
5 A construction sequence that shows how the level spreader will be protected from
sediment until the entire drainage area is stabilized
6 If a non - engineered VFS is being used, then provide a photograph of the VFS showing
that no draws are present
7 The supporting calculations
8 A copy of the signed and notarized operation and maintenance (0 &M) agreement
Initials Page or plan sheet number and any notes
Form SW401 - LS -VFS - 29June2012 - Rev 10 page 3 of 3