20120120 Ver 1_401 Application_20120212

20120120
Soil & Environmental Consultants, PA
11010 Raven Ridge Road • Raleigh, North Carolina 27614 Phone [phone] Fax [phone]
www SandEC com
February 3 2012
S &EC Protect # 11798 P I
To N C Division of Water Quality
WebSCaPe Unit
Attn Karen Higgins
512 N Salisbury Street 9`h floor
Raleigh NC 27603
From Nicole Thomson
Soil & Environmental Consultants P A
11010 Raven Ridge Road
Raleigh NC 27614
Re Neuse River Buffer Authorization Parkway Urology Raleigh Wake County NC
On behalf of the Owner Mr Thomas Paulson please find attached a complete application and supplemental
information requesting Neuse River Riparian Buffer Authorization from the N C Division of Water Quality (DWQ)
Please contact me at [phone] if you have any questions or require additional information
PROIFCT Ci iMM ARV
Project Name
Parkway Urology
Project Type
Medical development
Owner / Applicant
Mr Thomas Paulson
County
Wake
Nearest Town
Raleigh
Waterbody Name
UT to Crabtree Creek
Basin / Sub basin
03 04 02
Index Number
27 33 10
Class
C NSW
USGS Cataloging Unit
03020201
IMPACT SI iMM ARV
Stream Impact (acres)
0
Wetland Impact (acres)
0
Open Water Impact (acres)
0
Total Impact to Waters of the U S (acres)
0
Total Stream Impact (linear feet)
0
Total Neuse River Riparian Buffer Impact (square feet)
345 sq ft Zone 1 & 247 sq ft Zone 2
Attachments
Pre construction Notification (PCN) Application Form
Agent Authorization Form
USGS Topographic Site Vicinity Map
NRCS Soil Survey Site Vicinity Map
Soils Evaluation Report
Bioretention Area Calculation
Impact Maps (24X36)
2012
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Corps action ID no
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Form Version 13 Dec 10 2008
Page 1 of 12
PCN Form — Version 1 3 December 10 2008 Version
Pre - Construction Notification (PCN) Form
A
Applicant Information
1
Processing
1a
Type(s) of approval sought from the
Corps
El Section 404 Permit El Section 10 Permit
1 b Specify Nationwide Permit (NWP) number or General Permit (GP) number
1c
Has the NWP or GP number been verified by the Corps?
❑ Yes ❑ No
1d
Type(s) of approval sought from the DWQ (check all that apply)
❑ 401 Water Quality Certification — Regular ❑ Non -404 Jurisdictional General Permit
❑ 401 Water Quality Certification — Express ® Riparian Buffer Authorization
le
Is this notification solely for the record
because written approval is not required?
For the record only for DWQ 401
Certification
❑ Yes ❑ No
For the record only for Corps Permit
❑ Yes ❑ No
1f
Is payment into a mitigation bank or in lieu fee program proposed for mitigation
of impacts? If so attach the acceptance letter from mitigation bank or in lieu
fee program
❑ Yes ® No
1g
Is the project located in any of NC s twenty coastal counties If yes answer 1 h
below
❑ Yes ® No
1h
Is the project located within a NC DCM Area of Environmental Concern (AEC)?
❑ Yes ® No
2
Project Information
2a
Name of project
Parkway Urology Prostate Health Center
2b
County
Wake
2c
Nearest municipality / town
Raleigh
2d
Subdivision name
N/A
2e
NCDOT only T 1 P or state
protect no
u �%j
N/A a 'a1 0,
flu!)
3
Owner Information PER
3a
Name(s) on Recorded Deed
Mr Thomas Paulson
3b
Deed Book and Page No
05460/0624 PVETL4JVD DSTCR ICLALIITy
c
Responsible Party (for LLC if
applicable)
Mr Thomas Paulson
3d
Street address
2104 Peters Creek Parkway
3e
City state zip
Winston Salem NC 27127
3f
Telephone no
919 821 7890
3g
Fax no
N/A
3h
Email address
N/A
Page 1 of 12
PCN Form — Version 1 3 December 10 2008 Version

4
Applicant Information (if different from owner)
4a
Applicant is
❑ Agent ® Other specify Applicant is Owner as listed on the Agent
Authorization please copy agent (S &EC) on all correspondence
4b
Name
Mr Thomas Paulson
4c
Business name
(if applicable)
N/A
4d
Street address
2104 Peters Creek Parkway
4e
City state zip
Winston Salem NC 27127
4f
Telephone no
919 -821 7890
4g
Fax no
N/A
4h
Email address
N/A
5
Agent/Consultant Information (if applicable)
5a
Name
Nicole J Thomson
5b
Business name
(if applicable)
Sod & Environmental Consultants PA
5c
Street address
11010 Raven Ridge Road
5d
City state zip
Raleigh NC 27614
5e
Telephone no
[phone]
5f
Fax no
[phone]
5g
Email address
NThomson @sandec corn
Page 2 of 12

B Project Information and Prior Project History
1 Property Identification
1a Property identification no (tax PIN or parcel ID)
172397021
lb Site coordinates (in decimal degrees)
Latitude 35 7794 Longitude 785810
(DD DDDDDD) ( DD DDDDDD)
1c Property size
+/ 108 acres
2 Surface Waters
2a Name of nearest body of water (stream river etc ) to
UT to Crabtree Creek
proposed project
2b Water Quality Classification of nearest receiving water
C NSW 27 33 -(10) 03 -04 -02
2c River basin
Neuse River Basin (USGS Cataloging Unit 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 site is currently forested and is located adjacent to primarily office /institutional facilities to include Wake Med Hospital
Wake Technical Community College Health Sciences Campus Wake County Mental Health Center Wake County
Alcoholism Treatment Center Employment Security Commission Office African American Cultural Complex and an
NCDOT Traffic Survey Information & Mapping office
3b List the total estimated acreage of all existing wetlands on the property
0
3c List the total estimated linear feet of all existing streams (intermittent and perennial) on the property
Approximately 208 LF Please note that the channel enters the property in the northwest comer from an existing 54 inch
RCP under Sunnybrook Road and then exits the property before re emerging on the applicants property in the southeast
corner
3d Explain the purpose of the proposed project
The proposed site will be developed as a medical office which results in no jurisdictional impacts However the proposed
project is required to meet City of Raleigh Stormwater Management requirements and therefore has proposed a bio
retention cel to treat the stormwater generated by this project As such the applicant is requesting approval of the minor
amount of Neuse River Riparian Buffer impact associated with the overflow /bypass channel for this proposed BMP
3e Describe the overall project in detail including the type of equipment to be used
The site will be developed as a medical office but the specific project the applicant is requesting approval for relates to
the bypass /overflow channel for the required stormwater bio retention cel Equipment typical to stormwater BMP
construction will be used including backhoes excavators and dump trucks
4 Jurisdictional Determinations
4a Have jurisdictional wetland or stream determinations by the
Corps or State been requested or obtained for this property /
project (including all prior phases) in the past?
❑ Yes ❑ No ® Unknown
Comments
4b If the Corps made the jurisdictional determination what type
Preliminary El Final
of determination was made
4c If yes who delineated the jurisdictional areas?
Agency /Consultant Company
Name (if known)
Other
4d If yes list the dates of the Corps jurisdictional determinations or State determinations and attach documentation
Page 3 of 12
PCN Form — Version 1 3 December 10 2008 Version

B Project Information and Prior Project History
5 Project History
5a Have permits or certifications been requested or obtained for
this project (including all prior phases) in the past?
❑ Yes ® No ❑ Unknown
5b If yes explain in detail according to help file instructions
6 Future Project Plans
6a Is this a phased project?
❑ Yes ® No
6b If yes explain
Page 4 of 12

C Proposed Impacts Inventory
1 Impacts Summary
1a Which sections were completed below for your project (check all that apply)
❑ Wetlands ❑ Streams tributaries ® Buffers
❑ Open Waters ❑ Pond Construction
2 Wetland Impacts
If there are wetland impacts proposed on the site then complete this question for each wetland area impacted
2a
2b
2c
2d
2e
2f
Wetland impact
Type of jurisdiction
number —
Type of impact
Type of wetland
Forested
(Corps 404 10
Area of impact
Permanent (P) or
(if known)
DWQ — non -404 other)
(acres)
Temporary T
W1 ❑ P ❑ T
❑ Yes
❑ Corps
❑ No
❑ DWQ
2g Total wetland impacts
0
2h Comments
3 Stream Impacts
If there are perennial or intermittent stream impacts (including temporary impacts) proposed on the site then complete this
question for all stream sites impacted
3a
3b
3c
3d
3e
3f
3g
Stream impact
Type of impact
Stream name
Perennial
Type of jurisdiction
Average
Impact
number
(PER) or
(Corps 404 10
stream
length
Permanent (P) or
intermittent
DWQ — non -404
width
(linear
Temporary (T)
(INT)?
other)
(feet)
feet)
S1 ❑ P ❑ T
❑ PER
❑ Corps
❑ INT
❑ DWQ
3h Total stream and tributary impacts
0
31 Comments
4 Open Water Impacts
If there are proposed impacts to lakes ponds estuaries tributaries sounds the Atlantic Ocean or any other open water of
the U S then indiv ually list all open water impacts below
4a
4b
4c
4d
4e
Open water
Name of waterbody
impact number —
(if applicable)
Type of impact
Waterbody type
Area of impact (acres)
Permanent (P) or
Temporary T
01 ❑P ❑T
4f Total open water impacts
0
4g Comments
5 Pond or Lake Construction
If pond or lake construction proposed then complete the chart below
Page 5 of 12
PCN Form — Version 1 3 December 10 2008 Version

5a
5b
5c
5d
5e
Wetland Impacts (acres)
Stream Impacts (feet)
Upland
Pond ID
Proposed use or purpose
(acres)
number
of pond
Flooded
Filled
Excavated
Flooded
Filled
Excavated
Flooded
P1
P2
5f Total
5g Comments
5h Is a dam high hazard permit required
❑ Yes ❑ No If yes permit ID no
51 Expected pond surface area (acres)
5j Size of pond watershed (acres)
5k Method of construction
6 Buffer Impacts (for DWQ)
If project will impact a protected riparian buffer
then complete the chart below If yes then individually list all buffer impacts
below If any impacts require mitigation then you MUST fill out Section D of this form
6a
❑ Neuse ❑ Tar Pamlico ❑ Other
Project is in which protected basin?
❑ Catawba ❑ Randleman
6b
6c
6d
6e
6f
6g
Buffer impact
number —
Reason for
Buffer
Zone 1 impact
Zone 2 impact
Permanent (P) or
impact
Stream name
mitigation
(square feet)
(square feet)
Temporary T
required?
61 ®P ❑ T
Stormwater BMP
UT to Crabtree
El Yes
345
247
Bypass Swale
Creek
® No
6h Total buffer impacts
345
247
61 Comments The requested buffer impacts are the result of a bypass channel needed for a previously approved stormwater
management device These impacts are listed as allowable within the Neuse River Riparian Buffer Rules table of uses
Page 6 of 12

D
Impact Justification and Mitigation
1
Avoidance and Minimization
1a
Specifically describe measures taken to avoid or minimize the proposed impacts in designing project
The proposed site development avoids impacts to the stream located on the property In fact in addition to preserving
the Neuse River Riparian buffer the applicant has set aside an additional tree conservation area that extends beyond the
Neuse Buffer The applicant has also chosen to use retaining walls in the area where the proposed building is adjacent
to the Buffer The riparian buffer impacts requested in this application are solely for the purpose of constructing a
bypass /overflow channel from the stormwater bio retention cel proposed on site This stormwater BMP is designed to
treat all the storm flow that will be generated when this project is completed in compliance with City of Raleigh stormwater
requirements thereby ultimately improving water quality despite requiring a minimal amount of buffer impact to achieve it
1 b
Specifically describe measures taken to avoid or minimize the proposed impacts through construction techniques
The project will meet with the City of Raleigh requirements for Sediment and Erosion Control practices Tree protection
fencing will be utilized to ensure impacts remain within the permanent swale area as depicted on the impact maps
2
Compensatory Mitigation for Impacts to Waters of the U S or Waters of the State
2a
Does the project require Compensatory Mitigation for
impacts to Waters of the U S or Waters of the State?
❑ Yes ® No
2b
If yes mitigation is required by (check all that apply)
❑ DWQ ❑ Corps
2c
If yes which mitigation option will be used for this
projects
❑ Mitigation bank
❑Payment to in lieu fee program
❑ Permittee Responsible Mitigation
3
Complete if Using a Mitigation Bank
3a
Name of Mitigation Bank
3b Credits Purchased (attach receipt and letter)
Type
Quantity
3c Comments
4
Complete if Making a Payment to In lieu Fee Program
4a Approval letter from in lieu fee program is attached
❑ Yes
4b
Stream mitigation requested
linear feet
4c
If using stream mitigation stream temperature
❑ warm ❑ cool ❑cold
4d
Buffer mitigation requested (DWQ only)
square feet
4e
Riparian wetland mitigation requested
acres
4f
Non riparian wetland mitigation requested
acres
4g
Coastal (tidal) wetland mitigation requested
acres
4h
Comments
5
Complete if Using a Permittee Responsible Mitigation Plan
5a
If using a permittee responsible mitigation plan provide a description of the proposed mitigation plan
Page 7 of 12
PCN Form — Version 1 3 December 10 2008 Version

6 Buffer Mitigation (State Regulated Riparian Buffer Rules) — required by DWQ
6a Will the project result in an impact within a protected riparian buffer that requires
❑ Yes ® No
buffer mitigation?
6b If yes then identify the square feet of impact to each zone of the riparian buffer that requires mitigation Calculate the
amount of mitigation required
6c
6d
6e
Zone
Reason for impact
Total impact
Multiplier
Required mitigation
(square feet)
(square feet)
Zone 1
3 (2 for Catawba)
Zone 2
15
6f Total buffer mitigation required
6g If buffer mitigation is required discuss what type of mitigation is proposed (e g payment to private mitigation bank
permittee responsible riparian buffer restoration payment into an approved in lieu fee fund)
6h Comments The buffer impacts requested are minimal in nature and required solely to construct the bypass /overflow
channel from the proposed stormwater bio retention cel being built to treat the stormwater generated by this project when
completed It is our understanding that from an earlier meeting the project engineer (Mr Johnny Edwards) had with Ms
Annette Lucas (Stormwater Engineer for NC DWQ Central Office) that this plan was in accordance with DWQ
expectations for this BMP device It is also our understanding that these impacts are allowable per the Table of Uses
Page 8 of 12

E
Stormwater Management and Diffuse Flow Plan (required by DWQ)
1
Diffuse Flow Plan
1a
Does the project include or is it adjacent to protected riparian buffers identified
® Yes ❑ No
within one of the NC Riparian Buffer Protection Rules?
1 b
If yes then is a diffuse flow plan included? If no explain why
Comments This project is proposing a bio retention cel to capture and treat all
stormwater runoff generated by this project upon its completion Bio retention cels
❑ Yes ® No
are permitted to discharge directly to a surface water and therefore no diffuse flow
is required The minor amount of buffer impact requested in this application is
associated with the bypass /overflow channel for this device
2
Stormwater Management Plan
2a
What is the overall percent imperviousness of this project?
44%
2b
Does this project require a Stormwater Management Plan?
❑ Yes ® No
2c
If this project DOES NOT require a Stormwater Management Plan explain why
As this project is not requesting DWQ 401 Approval the Stormwater condition within the General Certifications does not
apply to this project and therefore no DWQ Stormwater review is required However
the City of Raleigh does require
stormwater treatment for the proposed development which is why the applicant has chosen to install a bio retention cel on
the property to handle the stormwater run-off generated by this project at its completion
2d
If this project DOES require a Stormwater Management Plan then provide a brief narrative description of the plan
❑ Certified Local Government
2e
Who will be responsible for the review of the Stormwater Management Plan?
❑ DWQ Stormwater Program
❑ DWQ 401 Unit
3
Certified Local Government Stormwater Review
3a
In which local government s jurisdiction is this project?
❑ Phase II
3b
Which of the following locally implemented stormwater management programs
❑ NSW
❑ USMP
apply (check all that apply)
❑ Water Supply Watershed
❑ Other
3c
Has the approved Stormwater Management Plan with proof of approval been
❑ Yes ❑ No
attached?
4
DWQ Stormwater Program Review
❑ Coastal counties
4a
Which of the following state implemented stormwater management programs apply
❑ HOW
❑ ORW
(check all that apply)
❑ Session Law 2006 246
❑ Other
4b
Has the approved Stormwater Management Plan with proof of approval been
attached
❑ Yes ❑ No
5 DWQ 401 Unit Stormwater Review
Page 9 of 12
PCN Form — Version 1 3 December 10 2008 Version

C Stormwater Management and Diffuse Flow Plan (required by DWQ) continued
5a Does the Stormwater Management Plan meet the appropriate requirements?
❑ Yes
❑ No
5b Have all of the 401 Unit submittal requirements been met?
❑ Yes
❑ No
Page 10 of 12

F
Supplementary Information
1
Environmental Documentation (DWQ Requirement)
1a
Does the project involve an expenditure of public (federal /state /local) funds or the
❑ Yes ® No
use of public (federal /state) land?
1 b
If you answered yes to the above does the project require preparation of an
environmental document pursuant to the requirements of the National or State
❑ Yes ❑ No
(North Carolina) Environmental Policy Act (NEPA/SEPA)?
1c
If you answered yes to the above has the document review been finalized by the
State Clearing House? (If so attach a copy of the NEPA or SEPA final approval
letter )
❑ Yes ❑ No
Comments
2
Violations (DWQ Requirement)
2a
Is the site in violation of DWQ Wetland Rules (15A NCAC 2H 0500) Isolated
Wetland Rules (15A NCAC 2H 1300) DWQ Surface Water or Wetland Standards
❑ Yes ® No
or Riparian Buffer Rules (15A NCAC 2B 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 violation(s)
3
Cumulative Impacts (DWQ Requirement)
3a
Will this project (based on past and reasonably anticipated future impacts) result in
❑ Yes ® No
additional development which could impact nearby downstream water quality?
3b
If you answered yes to the above submit a qualitative or quantitative cumulative impact analysis in accordance with the
most recent DWQ policy If you answered no provide a short narrative description
We have reviewed the DRAFT Internal Policy Cumulative impacts and the 401 Water Quality Certification and Isolated
Wetland Programs document prepared by the NC Division of Water Quality on April 10 2004 version 2 1 The draft
states that many private development projects including small commercial developments are unlikely to cause
cumulative impacts This project does not meet any of the three criteria of private projects that can clearly result in
cumulative impacts The proposed medical site development is relatively small in nature is within a commercially
developed landscape bounded by existing office /medical facilities and therefore the utility infrastructure (i a water and
electricity) are already in place to service the proposed development We anticipate that you will advise us if a qualitative
or quantitative impact analysis is required
4
Sewage Disposal (DWQ Requirement)
4a
Clearly detail the ultimate treatment methods and disposition (non discharge or discharge) of wastewater generated from
the proposed project or available capacity of the subject facility
This project will connect to existing sewer lines The City of Raleigh will ensure the capacity of their WWTF is not
exceeded
Page 11 of 12
PCN Form — Version 1 3 December 10 2008 Version

5 Endangered Species and Designated Critical Habitat (Corps Requirement)
5a Will this project occur in or near an area with federally protected species or
❑ Yes ® No
habitat?
5b Have you checked with the USFWS concerning Endangered Species Act
❑ Yes ® No
impacts?
El Raleigh
5c If yes Indicate the USFWS Field Office you have contacted
❑ Asheville
5d What data sources did you use to determine whether your site would impact Endangered Species or Designated Critical
Habitat?
As this project is only requesting Neuse River Buffer Riparian Authorization this question Is not relevant at this time
6 Essential Fish Habitat (Corps Requirement)
6a Will this project occur in or near an area designated as essential fish habitats
❑ Yes ® No
6b What data sources did you use to determine whether your site would Impact Essential Fish Habitat?
The proposed project is in Raleigh Wake County which is not near any coastal or tidal habitat that would support EFH
(i a salt marshes oyster reefs etc )
7 Historic or Prehistoric Cultural Resources (Corps Requirement)
7a Will this project occur in or near an area that the state federal or tribal
governments have designated as having historic or cultural preservation
❑ Yes ® No
status (e g National Historic Trust designation or properties significant in
North Carolina history and archaeology)?
7b What data sources did you use to determine whether your site would Impact historic or archeological resources?
As this project is only requesting Neuse River Buffer Riparian Authorization this question Is not relevant at this time
8 Flood Zone Designation (Corps Requirement)
8a WIII this project occur in a FEMA designated 100 year floodplain?
❑ Yes ® No
8b If yes explain how project meets FEMA requirements
8c What source(s) did you use to make the floodplain determination?
Information provided by project engineer as listed on the attached maps
Nicole J Thomson
February 3
05)/,��tveX--1
2012
Appllcan ent s ranted Name
Date
pelican ent Ignature
—authorization
(Agents signature is valid only if a letter from the applicant
is provided
Page 12 of 12

Environmental Consultants, PA
Road Raleigh, North Carolma 27614 Phone [phone] Fax [phone]
www SandEC com
AGENT AUTHORIZATION FORM
All Blanks To Be Filled In Py The Current Landowner or Municipal Official
Name X72y ",4=5 1V ¢AP e,. ®A1
Address —� /`'fir ✓E'1[� C:i:r �'L�G P� Gc/
Phone
Project Name/ Description 14' y S&EC Project # 1 1 1
Date Z
The Department of the Army
U S Army Corps of Engineers Wilmington District
P O Box 1890
Wilmington NC 28402
Attu cta ►► f �� \Crt1
Re Wetlands Related Consulting and Permitting
Field Office Ct �1
To Whom It May Concern
I the current landowner or municipal official, hereby designate and authorize Soil &
Environmental Consultants PA 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 The 1 day of 7€ C Z 0 11
This notification supersedes any previous correspondence concerning the agent for this project
NOTICE This authonzahon for liability and professional courtesy reasons is valid only for
government officials to enter the property when accompanied by S &EC staff You should call
S &EC to arrange a site meeting prior to visiting the site
Print Property Ow tier s or Muni ipal Official s Name
Ms Karin Iliggms
NCDCNR DWQ WeBSCAPe
Archdale Building
X12 N Sahsbur) St 9 h Floor
Raleigh NC 27604
Property Owner s or Municipal Official s Signature
cc Mrs Ni oleThoms<)n
Sod & Fnvironmental Consultants PA

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Soil & Environmental Consultants, PA
11010 Raven FMV Road • RaIOMA NOdb CKOhns 27614 • Mac (919) M&5900 • Fax. (919) 84fr94b9
Geotechnologies, Inc
Attu. Dave Israel
3200 Wellington Court, Suite 108
Raleigh, NC 27615
December 20, 2011
Job # 11788 S 1
Re Detailed soils evaluation for the Urology Prostate Health Center Storm Water
Bioretention basin, located at the intersection of Sunnybrook Road and Carl Sandburg
Court, Raleigh, NC
Dear Mr Israel
Soil & Environmental Consultants, PA (S&EC) performed a detailed soil evaluation
within the targeted area of the potential storm water bioretention basin on the site
mentioned above The purpose of tins evaluation was to provide additional mformation
ter the proper design of the proposed basin used as a BMP to treat the on site storm
water A soil morphological profile description was performed at the specified location
to a depth of 2 feet below the proposed basm bottom elevation to determine seasonal high
water table (SHWT) elevation. The following is a brief report of the methods utilized in
this evaluation and the results obtained.
SOiUSite Evaluation Methodology►
The site evaluation was performed by advancing a land auger boring to depth of 7 feet
from top of ground within the proposed basin location. S&EC navigated to flue basm
with a GPS receiver to describe soil morphological conditions at the boring location
using standard techniques outlined in the "Field Book for Desc nibirg and Sampling
Soils" published by the Natural Resources Conservation Service (NRCS 2002)
SOWSite Conditions
This site is located in the Piedmont uplands with soils formed from felsie and igneous
rock. The proposed lnoretenhon basm existing ground elevation is 223 78' and the
proposed basin bottom elevation is 220 00' S&EC advanced a hand auger boring to a
depth of 7' from top of ground in this location and did not encounter any evidence of
SHWT Field investigation revealed the soil bonng had no evidence of seasonal high
water table 2 feet below the proposed basin bottom elevation.
Current NC DWQ regulations also stipulate that an underdrarn must be installed in a
bioretention pond if soils underlying the structure have a drainage rate of less than 2

m/hr S&EC made no attempt to measure soil saturated hydraulic conductivity (Ksat) in
the underlying soil at this time, but based on pnor experience, behaves the underlying
soil does not have a hydraulic conductivity of greater than 2 m/hr
Soil & Envu+onmental Consultants, PA is pleased to be of service in this matter and we
look forward to assisting in the successful completion of the projea If requested, S &EC
can meet on site with NC-DWQ to discuss our findings and recommendations Please
feel free to call with any questions or comments
Sincerely,
Soil & Environmental Consultants, PA
Ricky Pontello
NC Iacroscd Soil Scientist #1232

Attachment 2 Soil Profile Description
Project Name Urology Prostate Health Center
Job Number 11788 S1
Date 12MBM1
Conducted By RP
to

GRAPHIC SCALE
1 =100
100 0 100 200
LEGEND
® SOIL SOkWG LOCATM
UROLOGY HEALTH CENTER
1wrr. mm Fe Vv 'law WAKE COUNTY NC GEO7ECHNOLOGIF PA
SOIL BORING LOCATION
No 11 06.51
'-100 1 rr
I Of I

Bioretention Area Calculations

Bio Retention Design
11123/2011
Project Parkway Urology Center
BioRetention
la =
071
(Impervious fraction unitless)
Rv =
069
(Runoff Coefficient undless)
Rd =
100
(Design storm depth inches)
A =
172
(Watershed Area Acres)
V =
430184
(Volume to be controlled in BR cf)
Bio Retention dimensions = variable
Area provided = 4600 00 sf
Volume provided @ 10 depth = 4600 00 of
# of clean -outs required= 4
D = 729 ft (total underdram pipe dia)
2 (# of 6 pipes required Table 5-1)

(to be Prodded by DWQ)
of 14 ATF9
HCDM o
STORMWATER MANAGEMENT PERMIT APPLICATION FORM
401 CERTIFICATION APPLICATION FORM
BIORETENTION CELL SUPPLEMENT
This form must be filled out printed and submmed
The Required !toms Che" (Part l►l) must be pm led figed out and submitted abog wlfh a8 of the required rnfomuation
Project name
Contact name
Phone number
Date
Drainage area number
919$28428
22.2012
.is.�,�., %- .t:+..a� -:YJ. btr�� .'�:::a:vtr.�.,.R:�':,.'�
.'E�`.�l� -iii, .d >.�.t,.?�� .�s...��.�...�t:..i�� _..ems •s��Sl���u�n'�n.��.,._ +'�i�:.�; e _ tk.F�sA�ri'
Drainage a :.
74 923 fe
Impervious
1 yr 24-hr Intensity
e «
Design wild depth
10 Inch
Peak Flow Calculations
Is prolpost control of the 1 yr 24-hr peak flow regln V
n (Y or N)
1 yr 24-hr runoff depth
In
1 yr 24-hr Intensity
inthr
Pre - development 1-yr 24-hr peak flow
ft'/sec
Post - development 1 yr 24-hr peek flow
ft3lsec
Pm/Post 1 yr 24-hr peak control
tt%ec
Storage Volume Non-SA Wafers
Minimum volume required
4 302 0 ft3
Volume provided
4 600 0 ft3
OK
Storage Volume SA Waters
15 runoff volume
ft3
Pre- development 1 yr 24-hr nunalf
tt3
Post-development 1 yr 24-hr runoff
ft3
Minimum volume required
0 ft3
Volume provided
ft3
Cell Dimensions
Pondmg depth of water
12 Indies
OK
Pondmg depth of water
10011
Surface area of the top of the bloivention cell
4 600 0 ft3
OK
Length
100 ft
OK
Width
50 ft
OK
-or Radius
ft
Media and Solis Summary
Drawdown time ponded volume
6 hr
OK
Drawdown dme to 24 Indies below surface
15 hr
OK
Drowdown time total
21 hr
In-situ sod
Soil permeability
4 00 inthr
OK
Planting media solh
Sod permeability
2 00 In/hr
OK
Soil composition
% Sand (by volume)
85%
OK
% Fines (by volume)
10%
OK
% Organic (by volume)
5%
OK
Total
100%
Phosphorus Index (P Index) of media
20 (unitless)
OK
Form SW4014Hcrehmftn•Rev 8
June 25 2010 Parts I and 11 Design Summary Pape 1 of 2

Basin Elevations
Temporary pool elevation
Type of bioretention cell (answer "r to only one of the two
following questions)
Is this a grassed cell?
Is tns a cell with tress/shrubs?
Planting elevation (top of the mulch or grass sod layer)
Depth of mulch
Bottom of the planting media soil
Planting media depth
Depth of washed sand below planting media soil
Are underdrains being Installed?
How many clean out pipes are being Installed?
What factor of safety is used for sizing the underdrains? (See
BMP Manuel Section 12 3 6)
Additional distance between the bottom of the planting media and
the bottom of the cell to account for undardrahns
Bottom of the cell required
SHWT elevation
Distance from bottom to SHWT
Internal Water Storage Zone (IWS)
Does the design include IWS
Elevation of the top of the upturned elbow
Separation of IWS and Surface
Planning Plan
Number of tree species
Number of shrub species
Number of herbaceous ground over species
Additional Infomlatlon
Does volume in excess of the design volume bypass the
txoretention cell?
Does volume In excess of the design volume flow evenly distributed
through a vegetated fifteR
What is the length of the vegetated filter?
fro be Povided byDWhy
225 00 fmsl
y (Y or N) OK
n (Y or N)
224 fmsl
0 inches Insufficient mulch depth unless installing grassed cell
221.25 fmsl
275ft
075ft
y (Y or N)
4 Insufficient number of clean out pipes provided
2 OK
1 it
219 5 fmsl
213 fmsl
65ft OK
Y (Y or N)
fmel
224 it
0
y (Y or N) OK
n (Y or N) Excess volume must pass through filer
ft
Does the design use a level spreader to evenly distribute flomR
n (Y or N)
Show how flow is evenly distributed
Is the BMP Iocated at least 30 feet from surface waters (50 feet d
y (Y 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 elopes equal to or less than 31?
y (Y or N)
OK
Is the BMP located in a proposed drainage easement with Scows
y (Y or N)
OK
to a public Right of Way (ROW)?
Inlet velocity (from treatment system)
1 f ?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 boretention Dell greater than 2D%? n (Y or N) OK
Is the drainage area permanently stabilized? y (Y or N) OK
Pretreatment Used
(Indicate Type Used with an )0 in the shaded cell)
Gravel and grass
(Ouches gravel followed by 3.5 it of grass)
Grassed swale OK
Forebay x
IQ
Form SW401 Sioreiendon-Rea 8
June 25 2010 Parts 1 and 11 Design Summary Page 2 of 2

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Bypass Channel Calculations

FHWA Urban Drainage Design Program, HY -22
HYDRAULIC PARAMETERS OF OPEN CHANNELS
Trapezoidal, Rectangular, or Triangular X- Section
Date 11/29/2011
Project No
Project Name
Computed by
INPUT PARAMETERS
1
Channel Slope (ft /ft)
0
1040
2
Channel Bottom Width (ft)
5
00
3
Left Side Slope (Horizontal to 1)
3
00
4
Right Side Slope (Horizontal to 1)
0
00
5
Manning's Coefficient
0
035
6
Discharge (cfs)
11
00
7
Depth of Flow (ft)
0
33
OUTPUT RESULTS
Cross Section Area (Sgft) 1 81
Average Velocity (ft /sec) 6 07
Top Width (ft) 5 99
Hydraulic Radius (ft) 0 28
Froude Number 1 94
,4/ s 72 GN °�/NE1 SLo PE= /G
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