SW8050409_HISTORICAL FILE_20050718

STORMWATER DIVISION CODING SHEET
POST -CONSTRUCTION PERMITS
PERMIT NO.
SW8
DOC TYPE
❑ CURRENT PERMIT
❑ APPROVED PLANS
HISTORICAL FILE
❑ COMPLIANCE EVALUATION INSPECTION
DOC DATE
YYYYMMDD

Michael F. Easley, Governor
William G. Ross, Jr., Secretary
North Carolina Department of Environment and Natural Resources
Alan W. Klimek, P.E. Director
Division of Water Quality
July 18, 2005
PPD, GP, LLC, General Partner
PPD Development, LP, Sole Manager
River Ventures, LLC
Fred Davenport, Vice President
3151 S. 17r Street
Wilmington, NC 28412
Subject: Stormwater Permit No. SW8 050409 Modification
PPD Corporate Headquarters
High Density Project
New Hanover County
Dear Mr. Davenport:
The Wilmington Regional Office received a complete Stormwater Management Permit Application for
PPD Corporate Headquarters on July 14, 2005 to modify Stormwater Permit SW8 050409, issued April
21, 2005. The initial permit was issued for a proposed Phase I project that included the construction,
operation, and maintenance of a Cultec infiltration chamber/trench system for stormwater management.
Staff review of the plans and specifications has determined that the subject project, as proposed for a
modification to the initial permit, will comply with the Stormwater Regulations set forth in Title 15A
NCAC 2H.1000. We are forwarding Permit No. SW8 050409 Modification dated July 18, 2005, for the
construction of the subject project that includes stormwater management of larger drainage and
Impervious areas, a temporary drainage basin during construction, and the application of 3 sand filters
instead of the previously permitted Cultec infiltration system for stormwater control.
This permit shall be effective from the date of issuance until July 18, 2015, and shall be subject to the
conditions and limitations as specified therein. Please pay special attention to the Operation and
Maintenance requirements in this permit. Failure to establish an adequate system for operation and
maintenance of the stormwater management system will result in future compliance problems.
If any parts, requirements, or limitations contained in this permit are unacceptable, you have the right to
request an adjudicatory hearing upon written request within sixty (60) days following receipt of this
permit. This request must be in the form of a written petition, conforming to Chapter 150B of the North
Carolina General Statutes, and filed with the Office of Administrative Hearings, P.O. Drawer 27447,
Raleigh, NC 27611-7447. Unless such demands are made this permit shall be final and binding.
If you have any questions, or need additional information concerning this matter, please contact Paul
Bartlett, or me at [phone].
Sin ��r//e��ly, ��! ��
�3bv'a'(�d'Be�`
Regional Supervisor
Surface Water Protection Section
ENB/ptb: S:\WQS\STORMWAT\PERMIT\050409MOD.ju105
cc: John Tunstall, P.E., Norris, Kuske & Tunstall
Tony Roberts, New Hanover County Building Inspections
City of Wilmington Stormwater Services
Beth E. Wetherill, New Hanover County Engineering
Division of Coastal Management
Paul T. Bartlett, P.E.
Wilmingti n-R6'glonal-Office--)
Central Files
North Carolina Division of Water Quality 127 Cardinal Drive Extension Phone [phone] Customer Services-877-623-6748 One
Wilmington Regional Office Wilmington, NC 28405-3845 FAX [phone] Internet h2o encstate nc us NorthCarolina
An Equal opportunity/Affirmative Action Employer- 50 % Recycled110 % Post Consumer Paper Naturally

State Stormwater Management Systems
Permit No. SW8 050409 Modification
STATE OF NORTH CAROLINA
DEPARTMENT OF ENVIRONMENT AND NATURAL RESOURCES
DIVISION OF WATER QUALITY
STATE STORMWATER MANAGEMENT PERMIT
HIGH DENSITY DEVELOPMENT
In accordance with the provisions of Article 21 of Chapter 143, General Statutes of
North Carolina as amended, and other applicable Laws, Rules, and Regulations
PERMISSION IS HEREBY GRANTED TO
PPD GP, LLC; PPD Development, LP; Fred Davenport, River Ventures, LLC
PPD Corporate Headquarters
929 N. Front Street, Wilmington, New Hanover County
FOR THE
construction, operation and maintenance of a temporary stormwater impoundment
during construction and three sand filter systems, that replace the initially -permitted -
infiltration trench system, in compliance with the provisions of 15A NCAC 2H .1000
(hereafter referred to as the "stormwater rules') and the approved stormwater
management plans and specifications and other supporting data as attached and on file
with and approved by the Division of Water Quality and considered a part of this permit.
This permit shall be effective from the date of issuance until July 18, 2015, and shall be
subject to the following specified conditions and limitations:
I. DESIGN STANDARDS
This permit is effective only with respect to the nature and volume of stormwater
described in the application and other supporting data.
This stormwater system has been approved for the management of stormwater
runoff as described in Section 1.6 on page 3 of this permit. The stormwater
control of this modification has been designed to handle the runoff from 197,096
square feet of impervious area, replacing the previously permitted infiltration
trench system for the control of 106,722 square feet of impervious area.
3. The tract will be limited to the amount of built -upon area indicated on page 3 of
this permit, and per the approved plans.
4. All stormwater collection and treatment systems must be located in either
dedicated common areas or recorded easements. The final plats for the project
will be recorded showing all such required easements, in accordance with the
approved plans.
5. The runoff from all built -upon area within the permitted drainage area of this
project must be directed into the permitted stormwater control system.
Page 2 of 8

State Stormwater Management Systems
Permit No. SW8 050409 Modification
6. The following design criteria have been provided in the three sand filters, that
replace the previously permitted Cultec Infiltration chamber/trench system, and
must be maintained at design conditions:
Sand Filter Number
Design Criteria
1
2
3
a.
Drainage Area, acres:
1.88
1.85
1.77
Onsite, ft2:
81,716
80,730
77,130
Offsite, ft2:
None
None
None
b.
Total BUA, ft2:
70,441
61,850
64,805
c
Design Storm, inches:
1"
1"
1"
d.
Sand Filter Depth, ft:
2.25
2.15
2.10
e.
TSS efficiency:
85%
85%
85%
f.
Filter Bottom, FMSL:
13.75
7.35
22.55
g.
Filter Area, ft2:
680
680
640
h.
Sediment Area, ft2:
680
680
640
i.
Storage Volume, ft3:
3060
2924
2688
j.
Top of sand, FMSL:
16.0
9.5
24.65
k.
Weir Elevation, FMSL:
17.0
10.5
25.65
1.
Grate Elevation, FMSL:
20.0-20.25
11.5-12.5
260-28.0
M.
Controlling Orifice:
18" 0
18"0
181'0
n.
Number of Orifices:
1
1
1
o.
Receiving Stream/River Basin:
NE Cape Fear R./Cape Fear
p.
Stream Index Number:
CPF 18-74-61
q.
Classification of Water Body:
.'SC Sw"
7. The following design criteria have been provided in the temporary stormwater
impoundment, to be operated and maintained during construction, and must be
maintained at design conditions:
a Drainage Area, acres:
50
Onsite, ft :
217,500
Offsite, ft2:
None
b. Total Impervious Surfaces, ft2:
217,500
C. Design Storm, inches:
0.61
d. Impoundment Depth, feet:
2.0
e. Temporary Storage Elevation, FMSL:
11.0
f. Permitted Surface Area @ 11' elev., ft2:
8,250
g. Permitted Storage Volume, ft3:
10,500
h. Controlling Orifice:
1.25"0 pipe
I. Receiving Stream/River Basin:
NE Cape Fear R./Cape Fear
M. Stream Index Number:
CPF 18-74-61
n. Classification of Water Body:
"SC Sw"
Page 3 of 8

State Stormwater Management Systems
Permit No. SW8 050409 Modification
II. SCHEDULE OF COMPLIANCE
The stormwater management system shall be constructed in its entirety,
vegetated and operational for its intended use prior to the construction of any
built -upon surface.
2. During construction, erosion shall be kept to a minimum and any eroded areas of
the system will be repaired immediately.
3. The facilities shall be constructed as shown on the approved plans. This permit
shall become voidable unless the facilities are constructed in accordance with
the conditions of this permit, the approved plans and specifications, and other
supporting data.
4. If the stormwater system was used as an Erosion Control device, it must be
restored to design condition prior to operation as a stormwater treatment device,
and prior to occupancy of the facility.
Upon completion of construction, prior to issuance of a Certificate of Occupancy,
and prior to operation of this permitted facility, a certification must be received
from an appropriate designer for the system installed certifying that the permitted
facility has been installed in accordance with this permit, the approved plans and
specifications, and other supporting documentation. Any deviations from the
approved plans and specifications must be noted on the Certification. A
modification may be required for those deviations.
6. The permittee shall at all times provide the operation and maintenance
necessary to assure the permitted stormwater system functions at optimum
efficiency. The approved Operation and Maintenance Plan must be followed in
its entirety and maintenance must occur at the scheduled intervals including, but
not limited to:
a. Semiannual scheduled inspections (every 6 months).
b. Sediment removal.
C. Mowing and revegetation of slopes and the vegetated filter.
d. Immediate repair of eroded areas.
e. Maintenance of all slopes in accordance with approved plans and
specifications.
f. Debris removal and unclogging of bypass structure, filter media, flow
spreader, catch basins, piping and vegetated filter.
g. A clear access path to the bypass structure must be available at all times.
7. Records of maintenance activities must be kept and made available upon
request to authorized personnel of DWQ. The records will indicate the date,
activity, name of person performing the work and what actions were taken.
8. Access to the stormwater facilities shall be maintained via appropriate
easements at all times.
Page 4 of 8

State Stormwater Management Systems
Permit No. SW8 050409 Modification
9. The permittee shall submit to the Director and shall have received approval for
revised plans, specifications, and calculations prior to construction, for any
modification to the approved plans, including, but not limited to, those listed
below:
a. Any revision to any item shown on the approved plans, including the
stormwater management measures, built -upon area, details, etc.
b. Project name change.
C. Transfer of ownership.
d. Redesign or addition to the approved amount of built -upon area or to the
drainage area.
e. Further subdivision, acquisition, lease or sale of all or part of the project
area. The project area is defined as all property owned by the permittee,
for which Sedimentation and Erosion Control Plan approval or a CAMA
Major permit was sought.
f. Filling in, altering, or piping of any vegetative conveyance shown on the
approved plan.
10. The permittee shall submit final site layout and grading plans for any permitted
future areas shown on the approved plans, prior to construction.
11. A copy of the approved plans and specifications shall be maintained on file by
the Permittee for a minimum of ten years from the date of the completion of
construction.
12. The Director may notify the permittee when the permitted site does not meet one
or more of the minimum requirements of the permit. Within the time frame
specified in the notice, the permittee shall submit a written time schedule to the
Director for modifying the site to meet minimum requirements. The permittee
shall provide copies of revised plans and certification in writing to the Director
that the changes have been made.
III. GENERAL CONDITIONS
This permit is not transferable except after notice to and approval by the Director.
In the event of a change of ownership, or a name change, the permittee must
submit a formal permit transfer request to the Division of Water Quality,
accompanied by a completed name/ownership change form, documentation
from the parties involved, and other supporting materials as may be appropriate.
The approval of this request will be considered on its merits and may or may not
be approved. The permittee is responsible for compliance with all permit
conditions until such time as the Division approves the transfer request.
Failure to abide by the conditions and limitations contained in this permit may
subject the Permittee to enforcement action by the Division of Water Quality, in
accordance with North Carolina General Statute 143-215.6A to 143-215.6C.
3. The issuance of this permit does not preclude the Permittee from complying with
any and all statutes, rules, regulations, or ordinances, which may be imposed by
other government agencies (local, state, and federal) having jurisdiction.
4. In the event that the facilities fail to perform satisfactorily, including the creation
of nuisance conditions, the Permittee shall take immediate corrective action,
including those as may be required by this Division, such as the construction of
additional or replacement stormwater management systems.
5. The permittee grants DENR Staff permission to enter the property during normal
business hours for the purpose of inspecting all components of the permitted
stormwater management facility.
Page 5 of 8

State Stormwater Management Systems
Permit No. SW8 050409 Modification
6. The permit may be modified, revoked and reissued or terminated for cause. The
filing of a request for a permit modification, revocation and reissuance or
termination does not stay any permit condition.
Unless specified elsewhere, permanent seeding requirements for the stormwater
control must follow the guidelines established in the North Carolina Erosion and
Sediment Control Planning and Design Manual.
Approved plans and specifications for this project are incorporated by reference
and are enforceable parts of the permit.
The permittee shall notify the Division any name, ownership or mailing address
changes within 30 days.
Permit issued this the 18th day of July 2005.
NORTWCAROLINA ENVIRONMENTAL MANAGEMENT COMMISSION
Alan W Klimek, P.E., Director
Division of Water Quality
By Authority of the Environmental Management Commission
Page 6 of 8

State Stormwater Management Systems
Permit No. SW8 050409 Modification
PPD Corporate Headquarters
Stormwater Permit No. SW8 050409 Modification
New Hanover CountV
Designer's Certification
I, , as a duly registered in the
State of North Carolina, having been authorized to observe (periodically/ weekly/ full
time) the construction of the project,
(Project)
for (Project Owner) hereby state that, to the
best of my abilities, due care and diligence was used in the observation of the project
construction such that the construction was observed to be built within substantial
compliance and intent of the approved plans and specifications.
The checklist of items on page 2 of this form is included in the Certification.
Noted deviations from approved plans and specification:
Signature
Registration Number
Date
SEAL
Page 7 of 8

State Stormwater Management Systems
Permit No. SW8 050409 Modification
Certification Requirements:
1. The drainage area to the system contains approximately the permitted
acreage.
2. The drainage area to the system contains no more than the permitted
amount of built -upon area.
3. All the built -upon area associated with the project is graded such that the
runoff drains to the system.
4. All roof drains are located such that the runoff is directed into the system.
5. The bypass structure elevations are per the approved plan.
6. The bypass structure is located per the approved plans.
7. A Trash Rack is provided on the outlet/bypass structure.
8. All slopes are grassed with permanent vegetation.
9. Vegetated slopes are no steeper than 3:1.
10. The inlets are located per the approved plans and do not cause short-
circuiting of the system.
11. The permitted amounts of surface area and/or volume have been
provided.
12. All required design depths are provided.
13. All required parts of the system are provided.
14. The required system dimensions are provided per the approved plans.
cc: NCDENR-DWQ Regional Office
Tony Roberts, New Hanover County Building Inspections

NKT #04268
Mate or ivortn i—arouna
Department of Environment and Natural Resources
Division of Water Quality
STORM WATER MANAGEMENT PERMIT APPLICATION FORM
This form may he photocopied for use as an original
I. GENERAL INFORMATION
1. Applicants name (specify the name of the corporation, individual, etc. who owns the project):
River Ventures, LLC
2. Print Owner/Signing Official's name and title (person legally responsible for facility and compliance):
Fred B. Davenport. Jr.. Vice President
3. Mailing Address for person listed in item 2 above:
3151 South 171h Street
Telephone
4. Project Name (subdivision, facility, or establishment name — should be consistent with project name on
plans, specifications, letters, operation and maintenance agreements, etc.):
PPD Corporate Headquarters
5. Location of Project (street address):
929 N. Front Street
City: Wilmington County: New Hanover
6. Directions to project (from nearest major intersection):
Intersection of Hwy 421 and Third Street (SR 1627 S) turn onto Hanover Street go .2 mi, right
onto Nutt Street, then you are at Hanover Street
7. Latitude: 340 14' 44" N Longitude: 770 56' 58" W of project
8. Contact person who can answer questions about the project:
Name: John S. Tunstall Telephone Number: [phone]
II. PERMIT INFORMATION
I. Specify whether project is (check one)
X New
Form SWU-101 Version 3.99 Page 1 of 4
Renewal Modification

7-1/0rM -&,e;f I,-v/l
sw8 oso4a9Mop
013
4.
If this application is being submitted as the result of a renewal or modification to an existing permit, list the
Existing permit number N/A And its issue date (if known)
Specify the type of project (check one):
Low Density High Density X Redevelop
Additional Project Requirements (check applicable blanks):
General Permit Other
CAMA Major X Sedimentation/Erosion Control _ 404/401 Permit _ NPDES Stormwater
Information on required state permits can be obtained by contacting the Customer Service Center at
1-877-623-6748.
III. PROJECT INFORMATION
In the space provided below, summarize how stormwater will be treated. Also attach a detailed narrative (one
to two pages) describing stormwater management for the project.
Due to existing impervious area of the site (88% impervious area existing), NC DENR has
considered this development a re -development project. Stormwater from the development will be
directed to three sand filter units. Per Brownsfield Agreement soil must be capped as soon as
possible therefore the southern parking area will have a temporary basin for treatment.
2. Stormwater runoff from this project drains to the
3. Total Project Area: 7.48 AC
Cape Fear River Basin.
4. Project Built Upon Area: 70.1 %
3 permanent Drainage area to sand filters
5. How many drainage areas does the project have?
1 temporary drainage area during construction
6. Complete the following information for each drainage area. If there are more than two drainage areas in the
project, attach an additional sheet with the information for each area provided in the same format as below.
Basin Information
Sand Filter 1
Sand Filter 2
Receiving Stream Name
Cape Fear River
Cape Fear River
Receiving Stream Class
SC
SC
Drainage Area
81,716 SF = 1.88 AC
1.85 AC = 80,730 SF
Existing Impervious * Area Existing Site
285,184 SF Total entire site
285,184 SF Total entire site
Proposed Impervious* Area PH I
70,441 SF = 1.62 AC
61 850 SF =1.42 AC
% Impervious* Area (total)
84.45%
76.76 %
Impervious* Surface Area
Sand Filter I
Sand Filter 2
On -site Buildings
37,826 SF
On -site Streets
On -site Parking
32,615 SF
59,200 SF = 1.36 AC
On -site Sidewalks
2,650 SF = 0.06 AC
Other on -site
Off -site
Total: 70,441 SF = 1.62 AC
Total: 61,850 SF = 1.42 AC
Form SWU-101 Version 3.99 Page 2 of 4

/rI/03 1)Te-A l-Z
3 w8 oS-Mol MOP
Basin Information
SAND FILTER #3
Temporary Stormwater Impoundment
Receiving Stream Name
Cape Fear River
Cape Fear River
Receiving Stream Class
Sc
Sc
Drainage Area
77,130 SF = 1.77 AC
5.0 AC = 217,500 SF
Existing Impervious * Area Existing Site
285,184 SF Total Entire Site
285,184 SF Total entire site
Proposed Impervious* Area
64,805 SF
217,500 SF
% Impervious* Area total
84.1%
100%
Impervious* Surface Area
Temporary Stormwater Impoundment
I
On -site Buildings
24,525 SF
On -site Streets
On -site Parking
18,650 SF
217,500 SF
On -site Sidewalks
3,250 SF
Other on -site Plaza
18,425 SF
Off -site
--
Total: 64,805 SF
Total: 217,500 SF
Forth SWU-101 Version 3.99 Page 2b of 4

7. How was the off -site impervious area listed above derived? N/A
IV. DEED RESTRICTIONS AND PROTECTIVE COVENANTS
The following italicized deed restrictions and protective covenants are required to be recorded for all
subdivisions, outparcels and future development prior to the sale of any lot. If lot sizes vary significantly, a
table listing each lot number, size and the allowable built -upon area for each lot must be provided as an
attachment.
1. The following covenants are intended to ensure ongoing compliance with state storm water management permit
number as issued by the Division of Water Quality. These covenants may
not be changed or deleted without the consent of the State.
2. No more than square feet of any lot shall be covered by structures or impervious materials.
Impervious materials include asphalt, gravel, concrete, brick, stone, .slate or similar material but do not include
wood decking or the water surface ofswimming pools.
3. .Swales shall not be filled in, piped, or altered except as necessary to provide driveway crossings
4. Built -upon area in excess of the permitted amount requires a state stormwater management permit modification
prior to construction.
5. All permitted runofffrom outparcels or future development shall be directed into the permitted stormwater control
system. These connections to the stormwater control system shall be performed in a manner that maintains the
integrity and performance of the system as permitted.
By your signature below, you certify that the recorded deed restrictions and protective covenants for this project
shall include all the applicable items required above, that the covenants will be binding on all parties and persons
claiming under them, that they will run with the land, that the required covenants cannot be changed or deleted
without concurrence from the State, and that they will be recorded prior to the sale of any lot.
V. SUPPLEMENT FORMS
The applicable state stormwater management permit supplement form(s) listed below must be submitted for each
BMP specified for this project. Contact the Stormwater and General Permits Unit at [phone] for the status
and availability of these forms.
Form SWU-102
Form SWU-103
Form SWU-104
Form SWU-105
Form SWU-106
Form SWU-107
Form SWU-108
Form SWU-109
Wet Detention Basin Supplement
Infiltration Basin Supplement
Low Density Supplement
Curb Outlet System Supplement
Off -Site System Supplement
Underground Infiltration Trench Supplement
Neuse River Basin Supplement
Innovative Best Management Practice Supplement
Form SWU-101 Version 3.99 Page 3 of 4

VI. SUBMITTAL REQUIREMENTS
Only complete application packages will be accepted and reviewed by the Division of Water Quality (DWQ).
A complete package includes all of the items listed below. The complete application package should be
submitted to the appropriate DWQ Regional Office.
Please indicate that you have provided the following required information by initialing in the space provided
next to each item.
• Original and one copy of the Stormwater Management Permit Application Form
• One copy of the applicable supplement form(s) for each BMP
• Permit application processing fee of $420 (payable to NCDENR)H y,00D.
• Detailed narrative description of stormwater treatment / management
• Two copies of plans and specifications, including:
- Development / Project name
- Engineer and firm
- Legend
- North arrow
- Scale
- Revision number & date
- Mean high water line
- Dimensioned property / project boundary
- Location map with named streets or NCSR numbers
- Original contours, proposed contours, spot elevations, finished floor elevations
- Wetlands delineated, or a note on plans that none exist
- Existing drainage (including off -site), drainage easements, pipe sizes, runoff calculations
- Drainage areas delineated
- Vegetated buffers (where required)
VIL AGENT AUTHORIZATION
If you wish to designate authority to another individual or firm so that they may provide information on your behalf,
please complete this section.
John S. Tunstall, P.E.
Designated agent (individual or firm): Norris, Kuske & Tunstall Consulting Engineers, Inc.
Mailing Address: 902 Market Street
City: Wilmington State: NC
Phone: [phone]
VIIL APPLICANT'S CERTIFICATION
Fax: [phone]
Zip: 28401
1, (print or type naive ofperson listed in General Information, item 2) Fred B. Davenport, Jr , Vice President
Certify that the information included on this permit application form is, to the best of my knowledge, correct and that
the project will be constructed in conformance with the appro d plans, that the required deed restrictions and
protective covenants will be recorded, and that the p pose project complies with the requirements of 15A NCAC
2H.1000. '/ o -I/ //
Signature:
Form SWU-101 Version 3.99 Page 4 of 4
Date: 19 1�P_,01

NEW HANOVER COUNTY
Engineering Department
230 Market Place Drive - Suite 160
Wilmington, North Carolina 28403.
TELEPHONE [phone]
Beth Easley Wetherill, C.P.E.S.C.
• Soil Erosion Specialist
MEMORANDiTr
Date:
—r—
To: Linda Lewis
N.C.D.E.N.R.
From: Beth E. Wetherill
Soil Erosion Specialist
Re: Sedimentation and Erosion Control Plan
Grading Permit #
FP
The attached plans have been submitted for approval to New Hanover County.
If you have any questions, please contact this office.
BEW/aj
Attachment

Inglill
C.."Coe enity Durgn
DESIGN 1 mdteape Anlnleelam
hrI"i m
MEETING NOTES
Meeting 13 May 2005 Issue
Date: Date:
Author: Tara A. Schwenzfeier, RLA/ASLA
Sr. Associate/ Sr. Project Manager
Project: PPD Headquarters Wilmington NC
0402OW
Location: Conference Call
16 May 2005
Attendees: Don Anderson (DA)
PPD
Tara Schwenzfeier (TS)
Cline Design Associates
John Tunstall (JT)
Norris, Kuske & Tunstall
Cheryl Moody (CM)
ECS, Ltd
Daphne Olszewski (DO)
NCDENR - Brownfield
Ed Beck (EB)
NCDENR-DWQ
Paul Bartlett (PB)
NCDENR - DWQ - SWP
Pete McClintock (PM)
Bovis Lend Lease
Scott Johns (SJ)
Bovis Lend Lease
1. JT gave overview and summary of the last meeting that was held 5.09.05 at 4:00 at the NCDENR offices in
Wilmington. EB agfeed JT summary was consistent with what was discussed.
2. EB indicated that it is important for stormwater not to interact with groundwater. Therefore, the designer may
want to re -permit Phase I and delete infiltration system. Sand Filters or other devices were suggested as an
option for treatment.
3. JT indicated that we will be providing subsurface dewatering for the building, and would like to re -permit
Phase I (to eliminate the infiltration system previously approved) as we permit Phase II.
4. EB questioned the intent of designing a building that will require constant/permanent dewatering of a
contaminated site.
5. CM indicated that the Design Team has looked at various alternative design options, and feel that a
permanent dewatering system for the building is the best way to proceed.
6. JT asked DO if it would be acceptable per the Brownfield Agreement (BFA) to cover up the contaminated
soils (cap) with the proposed Phase II parking lot, and provide sand filters to capture surface solids prior to
discharging into the City stormwater system. The proposed design would allow for no infiltration or movement
of water through grassed swales, however there will need to be landscaped islands in order to meet City of
Wilmington code requirements for planting.
7. JT indicated that sand filters or other treatment devices could be underground chambers and therefore not
visible and would eliminate infiltration of surface water from the parking/impervious areas into/thru
contaminated soils.
8. DO indicated it is acceptable, we will need to maintain 2' of clean soils in landscaped islands that are not to
be considered "capp'ed". DO will need a plan showing what is proposed in the way of the cap design for this
Cline IJerrgo A rraiatu. PA / 125 N. FlaniuQmn St. Rak+gb. NC27603 / 1e1919-833-6413. Jar')I el-8i6-12d0
Cline Design Associates ofWilmingron, PL.LC /530 Causeway Dr., PO Boc 598 / Wiighrsville Beach, NC 28480 / tel [phone], tax 910-2964144
a.v.ChneDefr;nA w.mm

page 2 of 2
site. Plan to include sand filter locations and island/planted area design, indicating shallow areas to be
considered "capped, (these would need 2' of clean soils) and the tree planted areas which will be considered
as not capped. Shewould like to receive this plan by the first week of June. This will not hold up proceeding
with the other agencies.
9. EB inquired of DO if,permanent dewatering was consistent with BFA.
10. DO replies affirmative so long as discharge was appropriately permitted.
11. DA revealed that recent analysis indicated that PPD will be handling/treating 80 g/p/m.
12. DA indicated that the intent is to cap the entire site as quickly as possible with asphalt to minimize treating
rainwater. Later, the planted islands will be cut out and planted accordingly.
13. JT inquired of EB and PB if they would agree to this proposed method. They answered yes, although there is
a twist in that stormwater permits usually need to be in place prior to the introduction of impervious surface
being placed on the site.
14. EB asked about any thoughts on temporary controls — package settling units, vortechnics or moveable
treatment units? JT and CM working on this.
15. EB and PB need a proposal from JT/CM showing proposed method of physical treatment, but indicated that
though they have not done this previously, they are willing to work with PPD to assist in a temporary solution
for capping the site prior to the issuance of a stormwater permit for Phase Il. Phase I has a permit and they
are willing to stand by that permit until it is amended as part of Phase ll.
16. There is no express. permitting option for NPDES, as this involves a public comment/hearing process. The
process will take at least 90 days form the time of submittal.
17. DA asked if the groundwater from the dewatering system for the construction process is captured and
treated/tested and is determined to be "clean" can it not just be discharged into the City stormdrain system?
18. PB/EB indicated this made them uneasy.
19. JT asked about taking water that is coming on site from the East into an eastern slot drain to catch the off site
water and divert this off site water to lower PPD's treatment costs. This would be a passive gravity system.
20. EB indicated that the concept is reasonable, but he is cautious due to the possibility of the water to interact
with contaminated on site soils. This would need to be run by/thru the City of Wilmington and other agencies
such as groundwater protection at NCDES.
21. JT will set up a meeting with PB for today or Monday to coordinate proposed methods.
22. CM will meet with EB regarding effluent levels.
23. JT will contact TS as soon as he has a direction regarding movement of last bay of parking in
Phase II and location for sand filers. TS will coordinate the necessary site plan modifications and
get a digital file back to JT.
Copy: 04020W_LPCD07
All participants.
t
NQticv
The above represents the authoes understanding of the items discussed and agreed upon during the meeting Please notify the author vrunediately in writing if
your understanding is different, and a clarification will be issued to all parties. We will consider this document accurate if no corrections are received within one
week of issuance
Chm nuiga Aoaialer. PA / 125 N Hmnagtna.St. Raletgb. NC 2703 / rc1919 833-6413. Jac 919-83(,-12.50
Cane Design Associaresof WiLun/,non,PLLC/530Causeway D,.,POBoc598/W,ghl,,,Y,Bcach,NC28480/re1910-256-4141 fuc910-256-4144
muv,CZneDruiGrefLxsnm
i
i

Notification of Completion of Assessment for a Brownfields Agreeme...
Subject: Notification of Completion of Assessment for a Brownfields Agreement «INSERT
CITY/COUNTY HERE>>
From: Daphne Olszewski <Daphne.01szewski@ncmaiLnet>
Date: Wed, 08 Jun 2005 14:50:53 -0400
To: "<\"Bud McCarty-- DWM HW Section FMB\">" <Bud.McCarty@ncmailnet>, "<\"Cameron
Weaver - WiRO 1 Stop Permits\">" <Cameron.Weaver@ncmaiLnet>, "<\"Charles Stehman - WIRO
Aquifer ProtectionV">" <Charles.Stehman@ncmail. net>, "<V"Charlotte Jesneck - DWM SF Section
LHSB\">" <Charlotte.jesneck@ncmaiLnet>, "<V"Coleen Sullins - DWQ WQ Section\">"
<Coleen.Sullins@ncmaiLnet>, "<V"Dave Lown - SF FRB\">" <David.Lown@ncmaiLnet>, "<\"Doug
Holyfield - Haz. Waste Compliance\">" <Doug.Holyfield@ncmaiLnet>, "<\"Grover Nicholson DWM
UST Section\">" <Grover.Nicholson@ncmaiLnet>, "<\"Helen Cotton - DWM HW Section PB\">"
<helen.cotton@ncmailnet>, "<V"Jack Butler - DWM SF SectionV">" <Jack.Butler@ncmaiLnet>,
"<\"Jesse Wells - HW Compliance - West\">" <Jesse.Wells@ncmailnet>, "<\"Jim Bateson - DWM SF
Section, SERB\">" <James.Bateson@ncmaiLnet>, "<\"Jim Coffey - DWM SW SectionV">"
<James.C.Coffey@ncmaiLnet>, "<\"Jim Gregson - CAMA Wilmington District\">"
<Jim.Gregson@ncmaiLnet>, "<\"John Powers - DSCA/MGP Programs>\"" <john.powers@ncmaiLnet>,
"<\"Liz Cannon - DWM HW Section\">" <Elizabeth.Cannon@ncmaiLnet>, "<\"Mike Williford - HW
Compliance - East\">'I.<Mike. Williford@ncmailnet>, "<\"Rob Krebs - UST Section\">"
<rob.krebs@ncmaiLnet>, "<\"Ted Bush - DWQ Aquifer Protection\">" <Ted.Bush@ncmaiLnet>
CC: "<V"Bruce Nicholson - DWM BF ProgramV">" <Bruce.Nicholson@ncmailnet>, "<V'Dexter
Matthews -DWM\">' <Dexter.Matthews@ncmailnet>, "<\"Linda Culpepper - DWM\">"
<Linda.Culpepper@ncmaiLnet>, "<\"Shirley Liggins - DWM BF Program\">"
<Shirley.Liggins@ncmailnet>, Judd Hartman <[e-mail]>
To DENR Cleanup Programs:
This is an internal courtesy notice to inform your program that the DENR Brownfields Program has
determined that the environmental sampling and receptor survey regarding a property we know as PPD
Headquarters Site, formerly part of the Almont Shipping property/BF#08027-04-65, located at the
corner of Harnett and North Front Streets, Wilmington, New Hanover County, is now adequate to
determine that the sitetis safe for the intended reuse of this property. As a reminder, the agreement is
between DENR and the prospective developer of the property and does not relieve any party
responsible for contamination at the site from liability. Under the brownfields agreement, the site is
being redeveloped as a office building with future commercial/retail buildings planned, with its use
limited to commercial, including but not limited to office space and retail establishments, including
restaurants.
This information is available for review in our file room located at 401 Oberlin Road, Suite 150,
Raleigh, NC. If you would like to make an appointment to review this material, please contact Shirley
Liggins at [phone] or by e-mail at Shirley. Liggins(rIncmail.net.
The Program does not desire inundate all regulatory entities with further email notices unless you request
it. So, if you would like to be notified when this project enters its 60-day public comment period with
details of the location of the repository for the full brownfields agreement and ancillary documents
please respond to this.email. Otherwise, you will not be notified until the Brownfields Agreement has
been signed by DENR. Full brownfields agreement information will also always be available at the
Oberlin Road office.
of 2 6/8/2005 2:57 PM

Notification of Completion of Assessment for a Brownfields Agreeme...
The party with whom DENR has entered into the agreement is: River Ventures, LLC , with the contact
information as follows:
Judd Hartman, Esquire
Pharmaceutical Product Development Inc.
3151 South 17th Street Extension
Wilmington, NC 28412
Judd. hartmanowi 1 m.ppdi. com
[phone] ,
If you have any questions, please contact me using the information found in the signature block below.
Regards, Daphne
Please Note new phone number
Daphne J. Olszewski
Brownfields Program Project Manager
North Carolina Division of Waste Management
401 Oberlin Road, Suite 150
Raleigh, NC 27605
[phone](direct dial)
[phone] (main number)
[phone] (fax)
[e-mail]
http://www.ncbrokmfields,org
of 2 6/8/2005 2:57 PM

FW: Days Inn
Subject: FW: Days Inn
From: "Katrina Winters"<[e-mail]>
Date: Mon, 18 Jul 2005 10:59:48 -0400
To: <[e-mail]>
-----Original Message -----
From: Katrina Winters
Sent: Friday, July 15, 2005 5:28 PM
To: '[e-mail]'
Subject: Days Inn
Dean —Contact information for the Days Inn, Atlantic Beach: owned by Neel-Kanth, LLC
Contact person: Roger Patel 602 West Fort Macon Rd. Atlantic Beach, NC 28512
252-247-6400
Also, please let me know when the lift stations, etc. are approved as installed and the Food Lion, Atlantic Beach
is able to get a food service permit.
Hope you had a great weekend.--- Katrina Winters, RS , Carteret Co Health Dept
1 of 1 7/18/2005 11:12 AM

NORRIS, KUSKE & TUNSTALL John S. Tunstall, P.E. J Phillip Norris, P.E.
Kent P. Harrell, P.E. John A. Kuske, III, RE
CONSULTING ENGINEERS, INC. James T. Pyrtle, P.E. J.A. Kuske, RE.
902 Market Street • Wilmington, NC 28401-4733 • Phone [phone] • Fax [phone]
E-Mail: [e-mail]
LETTER OF TRANSMITTAL
To: Paul Bartlett, P.E., Environmental Engineer
Date: July 13, 2005
Job No 04268
NC DENR
subject: PPD Corporate Headquarters
WE ARE SENDING YOU VIA HAND DELIVER
❑ ATTACHED ❑ UNDER SEPARATE COVER
❑ SHOP DRAWINGS ® PRINTS ❑ TRACINGS
❑ SPECIFICATIONS ❑ DISKS ❑ COPY OF LETTER
❑
FAX TRANSMITTAL: NUMBER OF PAGES
INCLUDING THIS TRANSMITTAL
Call 910-343-9653 if you have any difficulty
receiving this message.
COPIES
DATE
NO.
DESCRIPTION
2
07-08-05
C1
Grading, Drainage, & Erosion Control Plan
2
07-08-05
C2
Grading, Drainage, & Erosion
Control Plan
2
06-06-05
C3
Utility Layout Plan
2
06-29-05
C4
Notes and Details
2
07-08-05
C5
Notes and Details
2
06-29-05
C6
Notes and Details
2
06-06-05
C7
Notes and Details
2
Preliminary Plan
2
06-03-05
SD1.1
Overall Site Layout Plan
(D AS REQUESTED
❑ FOR YOUR USE
❑ FOR REVIEW AND COMMENT ❑ FOR APPROVAL
❑ FOR BIDS DUE ❑ YOUR PRINTS LOANED TO US
REMARKS: Revised plans per your additional information request.
cc.
JUL b u 09 v
SIGNED John S. Tunstall, P.E., /kbh
CONFIDENTIAL AND PRIVILEGED Information contained in this document is privileged and confidential, intended for the sole use of the
addressee. If you are not the addressee or the person responsible for delivering it to the addressee you are hereby notified that any dissemination,
distribution or copying of this document is strictly prohibited If you have received this document in error please immediately notify the sender and
return to the address above

PPD - Additional Information Request (SW8 050409MOD)
_�. 14�•( S v 9 O J,D¢C-1-1.tty/�)
Subject: PPD - Additional Information Request (SW8 050409MOD)
From: Paul Bartlett <[e-mail]>
Date: Tue, 12 Jul 2005 08:36:48 -0400
To: "John Tunstall / Norris, Kuske & Tunstall Engineers" <[e-mail]>
John;
As we discussed, the NKT submittal for PPD dated July 11 is complete except for 2
items:
1. Please provide a detail for Curb Inlets #10 and #26 (3 connecting pipes), and
2. Please clarify bottom elevations for Sand Filters 42 (7.35' or 7.51) and 43
(22.55' or 22.651) on Drawing C6.
Thank you,
Paul
%17-f05- /
g : 2Oktl
1 of 1 7/12/2005 8:37 AM

NORRIS, KUSKE & TUNSTALL John S. Tunstall, P.E. J. Phillip Norris, P.E.
Kent P. Harrell, P.E. John A. Kuske, III, P.E.
CONSULTING ENGINEERS, INC. JamesT. Pyrtle, P.E. J.A. Kuske, P.E.
902 Market Street • Wilmington, NC 284014733 • Phone [phone] • Fax [phone]
E-Mail: [e-mail]
LETTER OF TRANSMITTAL
To: Cameron Weaver, Express Review Coordinator II Date: July 11, 2005 II Job No. 04268 JI
11 or Paul Bartlett NC DENR I subject: PPD Corporate Headquarters
WE ARE SENDING YOU VIA FAX FAX TRANSMITTAL: NUMBER OF PAGES
❑ ATTACHED ❑ UNDER SEPARATE COVER INCLUDING THIS TRANSMITTAL
❑ SHOP DRAWINGS ❑ PRINTS ❑ TRACINGS
❑ SPECIFICATIONS ❑ DISKS ❑ COPY OF LETTER Call 910-343-9653 if you have any difficulty
❑ receiving this message.
COPIES DATE NO. DESCRIPTION
Additional Information for Stormwater Permit
2 Sets of plans
1 calculations revised
1 narrative revised
1 application revised pg 2 and 2b of 4
❑ AS REQUESTED ❑ FOR REVIEW AND COMMENT ❑ FOR APPROVAL
® FOR YOUR USE ❑ FOR BIDS DUE ❑ YOUR PRINTS LOANED TO US
REMARKS:
CC:
blUNtu John S. I unstali, P.E., /kbh
CONFIDENTIAL AND PRIVILEGED: Information contained in this document is privileged and confidential, Intended for the sole use of the
addressee. If you are not the addressee or the person responsible for delivering it to the addressee you are hereby notified that any dissemination,
distribution or copying of this document is strictly prohibited. If you have received this document in error please immediately notify the sender and
return to the address above.

Date I Design NORRIS, KUSKE &TUNSTALL 902 Market St. Sheet
CONSULTING ENGINEERS, INC Wilmington, N.C. 28401-4733
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'Date Design A NORRIS, KUSKE&TUNSTALL 902 Market St. Sh r
CONSULTING ENGINEERS, INC. Wilmington, N.C.28401-4733
Check Job Forr�� Job No.
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I
1S
Parking Are Paved due
to Soils(B ownfield)
Z. .:: 2P.
Temp. asphalt cap on
soils
SUbCa Reach on Link Drainage Diagram for 04268 PPD Headquarters Temp. Basin
Prepared by Andrew & Kuske Consulting Engineers, Inc 6/29/05
HydroCAD® 7.03 s/n D00479 0 20DS HydroCAD SoftwareSolulions LLC

04268 PPD Headquarters Temp. Basin Type Ill 24-hr Rainfall=7.00"
Prepared by Andrew & Kuske Consulting Engineers, Inc Page 2
Time span=0.00-24.00 hrs, dt=0.05 hrs, 481 points
Runoff by SCS TR-20 method, UH=SCS
Reach routing by Stor-Ind+Trans method - Pond routing by Stor-Ind method
Subcatchment 1S: Parking Area Paved due to Soils(Brownfield) Runoff Area=5.000 ac Runoff Depth>6.75"
Tc=10.0 min CN=98 Runoff=29.72 cfs 2.814 of
Pond 2P: Temp. asphalt cap on soils Peak Elev=11.63' Storage=16,294 cf Inflow=29.72 cfs 2.814 of
Outflow=28.01 cfs 2.568 of
Total Runoff Area = 6.000 ac Runoff Volume = 2,814 of Average Runoff Depth = 6.76"

0
04268 PPD Headquarters Temp. Basin Type /// 24-hr Rainfall=7.00"
Prepared by Andrew & Kuske Consulting Engineers, Inc Page 3
HydroCAD® 7.03 s/n 000479 ® 2005 HydroCAD Software Solutions LLC 6/29/05
Subcatchment 1S: Parking Area Paved due to Soils(Brownfield)
Runoff = 29.72 cfs @ 12.14 hrs, Volume= 2.814 af, Depth> 6.75"
Runoff by SCS TR-20 method, UH=SCS, Time Span= 0.00-24.00 hrs, dt= 0.05 hrs
Type III 24-hr Rainfall=7.00"
Area (ac) CN Description
5.000 98 Impervious area
Tc Length Slope Velocity Capacity Description
10.0 Direct Entry, Paved parking wlout Building
Subcatchment 1S: Parking Area Paved due to Soils(Brownfield)
Hydrograph
p RU—W
rime (hours)

M
04268 PPD Headquarters Temp. Basin Type Ill 24-hr Rainfall=7.00"
Prepared by Andrew & Kuske Consulting Engineers, Inc Page 4
HydroCADS 7.03 s/n 000479 ® 2005 HydroCAD Software Solutions LLC 6/29/05
Pond 213: Temp. asphalt cap on soils
Inflow Area = 5.000 ac, Inflow Depth > 6.75"
Inflow = 29.72 cfs @ 12.14 hrs, Volume= 2.814 of
Outflow = 28.01 cis @ 12.17 hrs, Volume= 2.568 af, Atten= 6%, Lag= 2.3 min
Primary = 28.01 cfs @ 12.17 hrs, Volume= 2.568 of
Routing by Stor-Ind method, Time Span= 0.00-24.00 hrs, dt= 0.05 hrs
Peak Elev= 11.63' @ 12.17 hrs Surf.Area= 10,140 sf Storage= 16,294 cf
Flood Elev= 12.00' Surf.Area= 11,250 sf Storage= 20,250 cf
Plug -Flow detention time= 87.6 min calculated for 2.562 of (91% of inflow)
Center -of -Mass det. time= 42.9 min ( 788.8 - 745.9 )
Volume Invert Avail.Storage Storage Description
#1 9.00, 20,250 of Custom Stage Data (Prismatic) Listed below (Recalc)
Elevation Surf.Area Inc.Store Cum.Store
(feet) (sq-ft) (cubic -feet) (cubic -feet)
9.00 2,250 0 0
10.00 5,250 3,750 3,750
✓11.00 8,250✓ 6,750 10,500✓
12.00 11,250 9,750 20,250
Device Routing Invert Outlet Devices
#1 Primary 6.50' 24.0" x 40.0' long Culvert RCP, square edge headwall, Ke= 0.500
Outlet Invert-- 6.20' S= 0.0075'r Cc= 0.900 n= 0.010
#2 Device 1 9.00' 1.2" Vert. Orifice/Grate C= 0.600
#3 Device 1 11.00' 16.0' long x 1.0' high Sharp -Crested Rectangular Weir
2 End Contraction(s)
Primary OutFlow Max=27.46 cfs @ 12.17 hrs HW=11.62' (Free Discharge)
t- 4=Culvert (Passes 27.46 cis of 30.71 cfs potential flow)
t2=06fice/Grate (Orifice Controls 0.06 cfs @ 7.7 fps)
3=Sharp-Crested Rectangular Weir (Weir Controls 27.40 cfs @ 2.8 fps)

I
04268 PPD Headquarters Temp. Basin Type /// 24-hr Rainfall=7.00"
Prepared by Andrew & Kuske Consulting Engineers, Inc Page 5
HydroCAD® 7.03 s/n 000479 ® 2005 HydroCAD Software Solutions LLC 6129/05
Pond 2P: Temp. asphalt cap on soils
"rograph
D trinow
1.[] Rinmry
Tim (hours)

STORMWATER SYSTEM & EROSION CONTROL NARRATIVE
PPD CORPORATE HEADQUARTERS
929 N. FRONT STREET
WILMINGTON, NC 28401
For
River Ventures, LLC
3151 South 171" Street
Wilmington, NC 28412
[phone]
`eeeeeec;?ts•�d�a
va n,C� Ciklp ".
199851
S
RECEIV �..D
JUL
8 P�rx� vD
June 2005 __
Prepared by:
NORRIS, KUSKE, & TUNSTALL CONSULTING ENGINEERS, INC.
902 Market Street
Wilmington, North Carolina 28401
[phone]
[phone] (Fax)
E-mail: [e-mail]
NKT Project No. 04268

NARRATIVE
DESCRIPTION:
NKT PROJECT NO, 04268 PPD Corporate Headquarters
The PPD project site is a 7.48 acres tract located at 929 North Front Street,
Wilmington, NC. The soils of the site consist of sands and silty sands with grades ranging
from 1% to 7%. Approximately 7.5 acres will be graded to allow construction of the new
PPD Corporate Headquarters building with paved parking and paved access. In addition to
the 7.48 acres tract, the 3.12+/- acres tract to the north will be used as construction laydown
area and stockpile area. The runoff from the site is estimated using the rational method 10-
year design storm and rainfall data for the area. Construction is scheduled to begin as soon
as all permits and approvals are obtained.
The project consists of a 13 story building with 2 parking levels below grade and a
surface parking and 2 access drives. Approximately 10.6 acres total will be disturbed for
the construction of the new building.
EROSION CONTROL MEASURES:
The attached plans and specifications give the requirements for erosion control
measures. Silt fencing will be provided along the north & western sides of the site where
stormwater would be expected to sheet flow from disturbed areas directly to adjacent
property. The temporary sediment trap is designed for the south 4.93 acres of the site
(surface parking area and future development area shown on plan to be filled during Phase
1). The north 2.55 acres of the site will be excavated to elevation 8 for the 2 parking decks
below the building. All sediment from a rain event will be trapped within the building
excavation. A silt basin/ temporary sediment trap will be constructed on the south west
portion of the site during construction and restored to its design contours prior to
completion. Prior to building excavation the southwest portion of site shall be bermed to
elevation 13.0. A temporary silt fence will be provided on the west side of this temporary
berm. Gravel construction entrances will be constructed as shown on the plans.
Maintenance will be provided by the grading contractor and developer.
STORMWATER MANAGEMENT MEASURES:
The project site is located in New Hanover County. Land disturbing on the site will
exceed one acre, which requires the site to comply with the City & State regulations. The
site is classified as a redevelopment site by NCDENR. The stormwater runoff from the
building and surface parking area of the development will be directed to three sand filters.
A temporary basin will be constructed along the south west portion of the site for treatment
of asphalt impervious area prior to sand filters being built.
CONSTRUCTION SEQUENCE:
The Contractor will install the gravel construction entrance and silt fence prior to
beginning any clearing and grading operations. Additional silt fence will be installed when
and if conditions warrant during construction. Prior to grading operations the temporary
berm/sediment trap will be constructed immediately along with the outlet structure with
protection. Disturbed areas will be landscaped or seeded upon completion.

EROSION CONTROL NOTES AND MAINTENANCE PLAN
1. Install erosion control measures before beginning construction or as soon
thereafter as possible. All erosion and sediment control practices 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 practices as designed.
2. Maintain the gravel construction entrances in a condition to prevent mud or
sediment from leaving the construction site. The contractor shall inspect the
construction entrances on a daily basis. This will require periodic top dressing
with additional No. 4 stone. Any objectionable materials spilled, washed, or
tracked onto public roadways shall be removed immediately.
3. Install erosion control measures around the drop inlets as shown on the plans to
trap silt during construction. Inspect the erosion control around the inlets after
each rain and make repairs immediately. Remove sediment when it becomes
0.50 deep to provide adequate storage volume for subsequent rains. When the
contributing drainage area has been adequately stabilized, remove all materials
and any unstable soil and either salvage or dispose of it properly. Bring the
disturbed area to proper grade and appropriately stabilize all bare areas around
the drop inlets.
4. Sediment will be removed from behind the silt fence when it becomes 0.5 feet
deep at the fence. The sediment fence will be repaired as necessary to maintain
a barrier. Silt fence stakes shall be spaced 6 feet apart unless a wire backing is
used with 8 foot stake spacing.
5. Inspect temporary sediment traps / check dams after each period of significant
rainfall. Remove sediment and restore the trap to its original dimensions when
the sediment has accumulated to one-half the design depth of the trap. Place
the sediment that is removed in the designated disposal area and replace the
contaminated part of the gravel facing. Check the structure for damage from
erosion or piping. Periodically check the depth of the spillway to ensure it is a
minimum of 1.5 ft below the low point of the embankment. Immediately fill any
settlement of the embankment to slightly above design grade. Any riprap
displaced from the spillway must be replaced immediately. After all sediment -
producing areas have been permanently stabilized, remove the structure and all
unstable sediment. Smooth the area to blend with the adjoining areas and
stabilize properly.
6. No cut or fill slopes shall exceed a side slope of 1 vertical to 3 horizontal unless
otherwise specified on the plan. All slopes shall be seeded and stabilized within
15 days.

7. All disturbed areas shall be seeded within 15 days of disturbance. All seeded
areas will be fertilized, reseeded as necessary and mulched according to
specifications in the vegetative plan to maintain a vigorous, dense vegetative
cover.
8. More stringent measures shall be used to halt erosion if those shown on this plan
are not effective.
9. All erosion shall be controlled including side slopes before the project is
completed.
10. Remove temporary measures upon completion of project. All permanent
measures will be well established before project closeout.

SECTION 02920
SOIL EROSION AND SEDIMENTATION CONTROL
1. GENERAL
1.1 Contractor shall take every reasonable precaution throughout construction to
prevent the erosion of soil and the sedimentation of streams, lakes, reservoirs, other
water impoundments, ground surfaces, or other property as required by State and Local
regulations.
1.2 The Contractor shall install all required silt fences, and construction entrances at
the initiation of work, and have these measures reviewed and approved by the local
permit authority prior to clearing and grading operations.
1.3 The Contractor shall, within 15 days of suspension or completion of land
disturbing activities, provide permanent protective covering for disturbed areas.
Temporary and permanent erosion control measures shall be coordinated to assure
economical, effective, and continuous erosion and siltation control throughout the
construction and post -construction period. Use the specified seed for both temporary and
permanent seeding.
2. PRODUCTS
2.1 Asphalt for anchoring mulch shall be Type SS-1 Emulsion.
2.2 Fertilizer shall be 10-10-10 grade or equivalent.
2.3 Lime shall be dolomitic agricultural ground limestone containing not less than 10
percent magnesium oxide.
2.4 Mulch shall be small grain straw, hay, wood chips, asphalt emulsion, jute or other
suitable material free of undesirable weed seed.
2.5 Phosphate shall be 20 percent superphosphate or equivalent.
2.6 Seed shall be 20% carpet grass, 24% Bermuda, 20% turf Fescue, 10% Creeping
Red Fescue, and 24% Annual Rye grain. Bermuda seed shall be hulled for warm
weather planting and unhulled for cool weather planting. Purity of seed shall be a
minimum of 98 percent and germination shall be a minimum of 85 percent.
2.7 Silt fence shall consist of NCDOT Class A fabric supported metal posts spaced
not more than 6 feet on center. The bottom of the fabric shall be buried a minimum of 6
inches. See details on plans.

2.8 Gravel for check dams shall be #57 washed stone.
2.9 Aggregate for construction entrance shall be #4 washed stone.
2.10 Stone rip rap for check dams and erosion control shall be NCDOT
Class A or B as shown. See detail Sheet C3 for specific Erosion Control
products.
3. EXECUTION
3.1 General: Take every practicable measure during construction or suspension to
work to minimize erosion and siltation. Measures should include good construction
practices, temporary physical barriers to sediment travel, settling basins for new ditches,
and establishment of vegetative cover.
3.2 Construction Practices
3.2.1 Avoid dumping soil or sediment into any wetland or watercourse.
3.2.2 Maintain an undisturbed vegetative buffer where possible between a natural
watercourse and trenching and grading operations.
3.2.3 Avoid equipment crossings of streams, creeks, and ditches where practicable.
3.2.4 Grade all cut, fill and ditch slopes to minimum slope of 3:1, unless otherwise
shown or directed.
3.3 Temporary Physical Barriers are required where sedimentation on off site
property or excessive erosion is a problem.
3.3.1 Mulch shall be used for temporary stabilization of areas subject to excessive
erosion and for protection of seedbeds after planting where required.
1. Apply grain straw and hay at a rate of 75 to 100 pounds per 1000 square feet
and wood chips at a rate of 500 pounds per 1000 square feet. Jute and mesh
should be installed as per manufacturer's instructions.
2. Asphalt emulsion for slope stabilization should be applied at a rate of 1,000
gallons per acre. Asphalt emulsion used for anchoring straw should be
applied at a rate of 150 gallons per ton of straw.
3.3.2 Silt Fences shall be used at the base of slopes to restrict movement of sediment
from the site. Clean silt fence of accumulated sediment after each rainfall event or
when it exceeds a depth of 0.5 feet above natural grade.

3.3.3 Stone Check Dams, placed at the discharges of creeks, ditches, and swales,
shall consist of Class A rip rap at minimum two feet high and three feet thick across the
watercourse, with a one foot thick layer of gravel on upstream side. Remove sediment if
accumulated to a depth of 1.0 feet at upstream face.
3.4 Vegetative Cover: Establish and maintain permanent vegetative cover on all
unpaved areas disturbed by the work.
3.4.1 Preparation of Seedbed: Areas to be seeded shall be scarified to a depth of 4
inches and until a firm, well pulverized, uniform seedbed is prepared. Lime, phosphorous
and fertilizer shall be applied during the scarification process in accordance with the
following rates:
Lime: 45 pounds per 1000 square feet
Phosphorous: 20 pounds per 1000 square feet
Fertilizer: 17 pounds per 1000 square feet
3.4.2 Seeding: Disturbed areas shall be seeded with 2 to 3 pounds per 1000 square
feet of the specified seed mixture. Seed shall be worked into the bed to a depth of 1/4
inch. Regrade and seed eroded areas immediately
3.4.3 Mulch all areas immediately after seeding. Mulch shall be applied and anchored
as specified hereinbefore. Reapply as necessary to retain cover until grass is
established.
3.5 Construction Entrance: Provide an aggregate drive, 20 feet wide by 50 feet long
by 6 inches thick at each entrance to the site used by construction vehicles, until such
time as the permanent roadway is constructed. Remove soil if accumulated to a depth
greater than 0.5 inches.
3.6 Maintenance: The Owner and Contractor shall be responsible for maintaining all
temporary and permanent erosion control measures. Temporary structures shall be
maintained until such time as vegetation is firmly established in the area protected by
the structure. Permanent streambank protection and grassed areas shall be
maintained until completion of the project. Areas that fail to show a suitable stand of
grass or which are damaged by erosion shall be immediately repaired.
END OF SECTION

* * * COMMUNICATION RESULT REPORT ( JUL. 1.2005 11:02AN ) * * *
P. 1
FILE MODE OPTION
197 MEMORY TX
REASON FOR ERROR
E-1) HANG UP OR LINE FAIL
E-3) NO ANSWER
ADDRESS (GROUP)
93439604
TTI NCDENR WIRO
-------PAGE----
'K ' P. 11/11
E-2) BUSY
E-4) NO FACSIMILE CONNECTION
State of North Carolina
Department of Environment and Natural Resources
Wilmington Regional Office
Michael F. Easley, Governor
FAX COVER SHEET
William G. Ross, Jr.. Secretary
Date: 7/1/05 No. of Pages: 11 (Incl. Cover)
To: John Tunstall From: Paul Bartlett
Company: NKT Water Quality Section - Stormwater
FAX M 910.343-9604 FAX #: [phone]
Phone #: [phone]
DWQ Stormwater Project Number: SW8 050409 Modification
Project Name: PPD Corporate Headquarters
MESSAGE:
John,
A Request for Additional Information is attached for the referenced project along with
the sand filter section of the current Draft SMP Manual. The Draft is available on-line at:
http:tth2o.enr.state.nc.ustsu/documents/NCDENRStormwaterBM PManualDraft.pdf
The reauest original will be mailed to Mr. Davenaort. and a 000v will be mailed to vou.

State of North Carolina
Department of Environment and Natural Resources
Wilmington Regional Office
Michael F. Easley, Governor
FAX COVER SHEET
William G. Ross, Jr., Secretary
Date: 7/1/05 No. of Pages: 11 (Incl. Cover)
To: John Tunstall From: Paul Bartlett
Company: NKT Water Quality Section - Stormwater
FAX #: [phone] FAX #: [phone]
Phone #: [phone]
DWQ Stormwater Project Number: SW8 050409 Modification
Project Name: PPD Corporate Headquarters
MESSAGE:
John,
A Request for Additional Information is attached for the referenced project along with
the sand filter section of the current Draft BMP Manual. The Draft is available on-line at:
http://h2o.en r.state. nc.us/su/documents/NCDEN RStormwaterBM PManualDraft. pdf
The request original will be mailed to Mr. Davenport, and a copy will be mailed to you.
ENB\ptb: S:\WQS\STORMWATER\ADDINFO\2005\050409MOD
127 Cardinal Drive Extension, Wilmington, NC 26405-3645 Telephone [phone] FAX [phone]
An Equal Opportunity Affirmative Action Employer

Michael F. Easley, Governor
William G. Ross, Jr., Secretary
North Carolina Department of Environment and Natural Resources
Alan W. Klimek, P.E. Director
Division of Water Quality
July 1, 2005
Mr. Fred B. Davenport, Jr.
Vice President
River Ventures LLC
3151 South 17th Street
Wilmington, NC 28412
Subject: Request for Additional Information
Stormwater Project No. SW8 050409 Modification
PPD Corporate Headquarters
New Hanover County
Dear Mr. Davenport:
The Wilmington Regional Office received a Stormwater Management Permit Application for
PPD Corporate Headquarters on June 30, 2005. A preliminary review of that information has
determined that the application is not complete. The following information is needed to
continue the stormwater review:
ir
t_t 0o
2.
J)rt 'r 3.
Please correct Section 111.1 of the application to state 2 sand filters to be
consistent with Section 111.6 of the application, the plans, calculations, and the
narrative.
Please clarify the 3 drainage areas reported in Section 111.5. by adding a note
briefly describing each area (i.e., Sand Filter #1, #2, and Temporary
Impoundment).
Please use the sand filter design requirement of 360 ft2 per acre of drainage area
instead of 360 ft2 minimum, in accordance with the 1999 BMP Manual and the
current Draft BMP Manual.
Please note that this request for additional information is in response to a preliminary review.
The requested information should be received by this Office prior to July 11, 2005, or the
application will be returned as incomplete. The return of a project will necessitate resubmittal of
all required items, including the application fee.
If you need additional time to submit the information, please mail or fax your request for a time
extension to the Division at the address and fax number at the bottom of this letter. The
request must indicate the date by which you expect to submit the required information.
;i
North Carolina Division of Water Oua0y 127 Cardinal Drive Extension Phone [phone] Customer Servicel-877-623-6748
Wilmington Regional Office Wilmington, NC 28405-3845 FAX [phone] Internet h2o enr state nc us One
NOrttlC3rOlID3
An Equal Opportunity/Affirmative Action Employer — 50 % Recycled/10% Post Consumer Paper Natu1'all y

Mr. Fred B. Davenport, Jr.
July 1, 2005
Stormwater Application No. SW8 050409 Modification
ot
The construction of any impervious surfaces, other than a construction entrance under
an approved Sedimentation Erosion Control Plan, is a violation of NCGS 143-215.1 and
is subject to enforcement action pursuant to NCGS 143-215.6A.
Please reference, the State assigned project number on all correspondence. Any
original documents that need to be revised have been sent to the engineer or agent. All
original documents must be returned or new originals must be provided. Copies are not
acceptable. If you have any questions concerning this matter please feel free to call me
at [phone].
Sincerely,
Paul T. Bartlett, P.E.
Environmental Engineer
ENB/ptb: S:\WQS\STORMWATER\ADDINFO\2005\050409MOD
cc: Norris, Kuske & Tunstall Consulting Engineers, Inc.
Paul Bartlett
Page 2 of 2

J' a 1,v IV4d vrQ-r+ d Al p >Maax� ae/Gt. ( �� o w ` 1 to af'.
��+�'-lJ� o r✓�� si7ft7t.'AC,us/s-gzCuos m w:aVoA
3.14 Sand Filter (r��.�j�(�,,,t�j{+�0�
Companion BMPs: Filter Strip; Grassed Swale
Alternative BMPs: Bioretention
3.14.1 Definition
A sand filter (see Figure 3.14-1) is a device that allows stormwater to percolate down
through sand,layers and possibly a top -soil layer, where TSS and, to varying degrees, other
pollutants are filtered out.
3.14.2 Description and Purpose
Two main types of sand filters are presented here - the open sand filter and the closed sand
filter. Open sand filters can treat the largest drainage area of any type of filtering BMP. A
variation of the open sand filter, the open organic filter is used when maximum nutrient or
trace metal removals are desired. A major difference in open and closed sand filters is that
runoff filterecd through a closed sand filter is collected in underground pipes and discharged
to a drain. Water is not infiltrated into the groundwater. This is a method of obtaining the
benefits of sagd filtration without the potential contamination of groundwater.
3.14.3 Advantages
• Highly effective at filtering TSS.
• Can filter flows from moderate to large areas.
17
• Larger units can attenuate runoff peaks, particularly if the design storm is not large (e.g.,
less than its
return period).
• Underground closed filters are useful where space is limited.
• Perimeter,'closed filters useful for small sites with flat terrain or high water table.
3.14.4 Disadvantages
• Need to integrate trash screens or grated inlets in all designs so materials that can cause
premature failures are kept out of filter chambers. Frequent cleaning of these screens
may be required. Clogging of the sand filter materials can limit BMPs life -span.
e
• If anoxic conditions develop in the sand filter, phosphorus levels can increase as water
passes through the sand filter. (Avoid this by the maintenance described below when
the filter takes longer than 24 hours to drain.)
• May not lie effective in controlling peak discharges.
• Large sarid filters without grass cover may not be attractive in residential areas.
• When employed in some settings, trash accumulation on the surface of sand filters can
be unattractive.
P
r:
NCDENR STCRMWATER, BMP MANUAL.DCC
t(
L1
1199

3.14 SAND FILTER
FIGURE 3.14-1
Typical (Open) Sand Filter
From Stormwatei Manager's Resource Center (2004)
BYPASS JFLOWDIVERSION
tSTRUCTURE
PRETREATMENT
SEDIMENTATION
CHAMBER
PERFORATED STANDPIPE
WATER QUALITY
PRETREATMENT
TOPSOIL
CUFANEDWASHED
'CONCRETE -SAND
1,
7
NCDENR STORMWATER BMP MANUALDOC
DRAIN COLLECTION SYSTEM
BED
I
OUTFLOW
OUTFLOW
SPILLWAY
FILTER FABRIC
FILTER FABRIC
PERFORATED PIPE / GRAVEL
UNDERDRAIN SYSTEM
OUTFLOW
SPILLWAY
OUTFLOW
3-200

314 SAND FILTER
3.14.5 Location/General Characteristics
Sand and organic filtering systems are generally applied to land uses with a large fraction of
impervious surfaces. Maximum contributing area to an individual stormwater filtering
system is usually less than 10 acres. Some sand filters, however, including the Delaware
sand filter, can be used to treat a drainage area of up to 50 acres (Shaver and Baldwin,1991).
Higher efficiencies can be achieved with smaller drainage areas, though. Stormwater filters
typically require 2 to 6 feet of head (i.e., elevation difference); however, the perimeter sand
filter (Figure 3.15-2) can be designed to function with as little as 1 foot of head.
3.14.6 Design
Requirements for Regulatory Compliance
For purposes of satisfying the requirements of 15A NCAC 2H .1000, a properly designed
and constructed sand filter is assumed to have a TSS removal efficiency of 85 percent. In
addition, control of the 1-year, 24-hour storm runoff to pre -development rates must be
demonstrated.
!F
For purposes of satisfying the nutrient control requirements found in several Environmental
ManagemenfCommission rules, a properly designed and constructed sand filter is assumed
to have a nitrogen removal efficiency of 40 percent. In addition, control of the 1-year,
24-hour storm runoff to pre -development rates must be demonstrated.
,c1
The design guidelines in Section 3.14.6.2 should be followed to achieve these TSS and N
removal efficiencies; however, alternative designs, materials, and methodologies will be
considered on a case -by -case basis.
N
Design Guidelines
General
Sand filters are designed primarily for water quality enhancement and peak runoff
attenuation is, typically a secondary consideration.
Design Specifications and Methodology
Design Requirements
Sediment Chamber:
�• Volume =)540 ft3 per acre of drainage area
✓• At least 18, inches deep
• Surface area at least 360 ftz/acre
• Positive drainage to the chamber either in conduit or surface drainage
• No outlee.bxcept to sand chamber
• Outlet to sand chamber to result in sheet flow
i
Sand Filter Chamber:
• Filter volume = 540 ft3 per acre of drainage area
n/ • At least 18 inches of sand particles less than 2 mm average diameter
• A surface area of at least 360 ft2/acre
ie
NCDENR STORMWATER BMP MANUAL.DOC
3401

,r
.3 3.14 SAND FILTER
• An outlet positioned and sized such that the sand chamber will drain completely in
24 hours.
• No single outlet pipe sized greater than 6 inches, to provide a minimum of 12 inches of
sand above pipe
The design parameters above assume an average filtration rate of 0.04 gal/min/ftz (about
4 in/h) with 1 foot of head on the sand surface. This rate is needed to allow the runoff from
1.
the first inchlbf rainfall to pass through the filter within a period of 24 hours. As a result,
each square foot of sand must transmit approximately 62 gallons of water over a period of
24 hours. This design assumes that drainage through the sand chamber will occur
throughout the duration of runoff.
✓/ Storms that exceed 1 inch of runoff, depending on their intensity and duration, may
l overflow the sand filter. In these situations, runoff may not receive the same level of
0
treatment as "runoff from smaller storms. Where stormwater quantity control is required,
runoff that will flow over the sand filter must be considered in addition to the water flowing
from the normal outlet from the sand filter.
The filter structure must be designed to structurally withstand any load that is expected to
occur (water quantity, sediment quantity, and surface loading).
In addition, the following guidelines are recommended:
Soil
Sand filters can be adapted to areas with low -permeability soil because pipes can be used to
collect the flow from the sand area and direct it to a storm drain or to a stream. If high -
permeability,', soils are located under the sand filter, the runoff can be infiltrated using an
open filter and provided that there are no concerns with groundwater contamination. In this
case, design alternatives must be supported by a field investigation that establishes the
infiltration capacity of the subgrade materials.
Contributing Drainage Area
The upper limit of the contributing drainage area for sand filters is approximately 50 acres;
however, most sand filters have a contributing watershed between one-half and 10 acres
(Schueler et al.,1992).
Filter Bed
The filter bedytypically has a minimum depth of 18 inches.
Design Discharge
Sand filters should be designed to pass the spillway design storm (per local ordinance).
Typically, overflow weirs are used to bypass this and any other large storm discharges.
Overflow from the open sand filter should be provided to a non -erosive outlet point (e.g., to
prevent downstream slope erosion).
If runoff is delivered by a storm drain or is along the main conveyance system, the filtering
IIL system should be designed off-line. A flow regulator (or flow splitter diversion structure)
should be provided to divert the water quality treatment volume to the sand filter.
/ Stormwater filters should be equipped with a minimum 4 -inch perforated pipe underdrain
✓ (6 inches is preferred) in a gravel layer. The underdrain should be designed to carry 10 times
i
NCDENR STORMWATER SMP MANUAL DOC 3202.

!T;
3.14 SAND FILTER
the maximum flow from the filter medium. A permeable filter fabric should be placed
between the gravel layer and the filter media.
Slope
The slope of the contributing drainage area is not restricted, but the slope of the top of a
sand filter generally should be flat.
3.14.7 Cost
As reported in a study by Brown and Schueler (1997) it is difficult to generalize cost figures
because of the variety of filter designs available. The study was unable to determine a valid
correlation between the volume of stormwater treated and the cost of the filter. Typical total
cost of installation ranged between $2.50 and $7.50 per cubic foot of stormwater treated,
with an average cost of about $5 per cubic foot. These estimates include a 25 percent
contingencyNn addition, the cost can be impacted by the land use. For example, closed and
perimeter sand filters can be more expensive than open sand filters but they allow full use of
the site, which can be a major cost advantage in areas with high land prices.
3.14.8 Performance Enhancers
The performance and longevity of filters benefit greatly from pre-treatment that reduces the
amount of suspended solids entering the BMP. For example, filter strips and grassed swales
can be deployed upstream of sand filters for this purpose.
Continual inspection should be conducted, especially after a storm event, to detect the need
for maintenance (see Section 3.14.10 Monitoring).
The pollutant'removal mechanism of filters is mainly mechanical filtration, although other
processes may be present such as adsorption. However, biofiltration devices such as
bioretention jirovide additional mechanisms such as biodegradation and phytoremediation.
When applicable, bioretention can be a more effective alternative to infiltration devices.
3.14.9 Construction Guidelines
IF
The filter should conform to the specifications listed in Table 3.14-1
TABLE 3.14-1
Filter SDecifica
Material Specification/Test Method Size Notes
Sand Clean AASHTO-M-6 or ASTM-C- 0.02" to 0.04" Sand substitutions such as Diabase
33 concrete sand and Graystone #10 are not
acceptable. No.calcium or dolomitic
sand substitutions are acceptable.
No "rock dust" can be used for
sand.
Peat' Ash Content: <15 percent We The material must be reed -sedge
humic peat, shredded,
!1' pH range: 5.2 to 4.9 unoompacted, uniform, and clean.
<,#!. Loose bulk density
Leaf compost' ;; n/a
NCDENR STORMWATER BMP MANUAL DOC 3203
1.

S
314 SAND FILTER
TABLE 3.14.1
Material
Specification/Test Method
Size
Notes
Underlain gravel'
AASHTO-M-43
0.375" to 0.75"
Geotextile fabric (if
ASTM-D-4833 (puncture
0.08" thick
Must maintain 125 gpm/ ftz. flow
required)
strength-125 lb)
equivalent
rate. Note: a 4" pea gravel layer
opening size of
may be substituted for geotextiles
ASTM-D-4632 (tensile strength-
#80 sieve
meant to "separate" sand filter
'
300l1b)
layers.
Impermeable liner
ASTM-D-4833 (thickness)
30 mil thickness
Liner to be ultraviolet -resistant. A
(if required)
geotextile fabric should be used to
ASTM-D-(tensile strength
protect the liner from puncture.
i
1,100 Ib, elongation
longation 200 percent)
_
ASTM-D624 (tear resistance —
150 lb/in)
c.
ASTM-D-471 (water adsorption:
+8 to 2 percent mass)
Underlain piping,'
F758, Type PS 28 or AASHTO-
4" — 6" rigid
3/8" perf. @ 6" on center, 4 holes
�
M-278
schedule 40
per row; minimum of 3" of gravel
'
PVC or SDR35
over pipes; not necessary
-
underneath pipes
Concrete (cast-iii-
MSHA 2 Standards and Specs.
N/a
On -site testing of poured -in place
place)
concrete required: 28-day strength
Section 902, Mix No. 3, fa -=
and slump test; all concrete design
3,500 psi, normal weight, air-
(cast -in -place or pre -cast) not using
entrained; reinforcing to meet
previously approved state or local
ASTM-615-60
standards requires design drawings
sealed and approved by a licensed,
`
professional structural engineer.
Concrete (pre-
Per pre -cast concrete
N/a
cast)
manufacturer
Non-rebar steel.,-
ASTM A-36
N/a
Source: 2000 Maryland Stormwater Design Manual
x
1 Open sand filter only
2 Maryland State;Highway Administration
i
3.14.10 Monitoring
Sand filters should be inspected at least once per year after a storm event, to. ascertain
whether the filter's infiltration capacity is decreasing due to clogging of the top layer. This
layer may be removed in such cases to restore the infiltration rate (see Section 3.14.11
Maintenance).
3.14.11 Maintenance
Sand filters must be maintained as needed to remove visible surface sediment accumulation,
trash, debris, and leaf litter to prevent the filter from clogging prematurely. The top layer
may need to be removed and replaced if the annual monitoring shows a decrease in the
NCDENR STORMWATER 6MP MANUAL DOC
3204

314 SAND FILTER
infiltration capacity. In areas where heavy hydrocarbon loadings may be expected, the top 2
to 3 inches of'sand or overlying layers of geotextile and top soil must be replaced every 3 to
5 years. The removed material must be tested for proper disposal.
The maintenance guidelines are as follows:
• The sediment chamber outlet devices should be cleaned or repaired when drawdown
times within the chamber exceed 24 hours. Trash and debris should be removed as
necessary`. Sediment should be cleaned out of the sedimentation chamber when it
accumulates to a depth of more than 6 inches.
When the filtering capacity of the filter diminishes substantially (e.g., when water ponds
on the surface of the filter bed for more than 24 hours), the topsoil and underlying 3
inches of filter material should be removed and replaced with fresh material. The
removed sediments should be tested and disposed of in an acceptable mariner (e.g.,
1.
landfill). Silt/sediment should be removed from the filter bed when the accumulation
exceeds 11inch.
Vegetatid4 within the sedimentation chamber of open sand or organic filters should be
mowed to limit the height to 12 inches. Vegetation within the sedimentation chamber of
a closed sand filter should be removed.
Direct maintenance access should be provided to the pretreatment area and the filter
bed.
3.14.12 References and Additional Resources
Bell, W. and T. N. Nguyen. "BMP Technologies for Ultra -Urban Settings," Proceedings of the
Norfolk Branch Virginia Section American Society of Civil Engineers Annual Technical Seminar,
Watershed Planning & Management, Current Approaches and New Directions. ASCE. New York,
NY. 1996.
Brown, W. and T. Schueler. 1997. The Economics of Stormwater BMPs in the Mid -Atlantic
Region. Prepared for: Chesapeake Research Consortium. Edgewater, MD. Center for
Watershed Protection. Ellicott City, MD.
City of Alexgi.dria (Virginia). Alexandria Supplement to the Northern Virginia BMP Handbook.
Department of Transportation and Environmental Services. Alexandria, VA. February 1994.
City of Austin (Texas). Environmental Criteria Manual. Environmental and Conservation
Services Department. Austin, TX. 1988.
Galli, J. Peat -Sand Filters: A Proposed Stormwater Management Practice far Urbanized Areas.
Metropolitan ;Washington Council of Governments, Department of Environmental
Programs. Washington, D.C. 1990.
Livingston, E. H., M. E. McCarron, J. H. Cox, and P. A. Sanzone. Florida Development Manual
A Guide to Sound Land and Water Management. Florida Department of Environmental
Regulation. Tallahassee, FL. 1988.
Maryland Department of the Environment, 2000 Maryland Stormwater Design Manual, 2000.
NCDENR STORMWATER'SMP MANUAL.DOC 3205

Schueler, T. R., P. A. Kumble, and M. A. Heraty. A Current Assessment of Urban Best
Management Practices. Metropolitan Washington Council of Governments, Department of
Environmental Programs. Washington, D.C. 1992.
Stormwater Manager's Resource Center. (www.stormwatercenter.neD. Accessed October
2004. Centerfor Watershed Protection.
Shaver, E. and R. Baldwin. Sand Filter Design for Water Quality Treatment. State of Delaware
Department of Natural Resources and Environmental Control. Dover, Delaware. 1991.
Truong, H. V:, C. R. Burrell, M. S. Phua, and R. D. Dallas. Application of Washington D.C. Sand
Filter for Urbann Runoff Control. District of Columbia Environmental Regulation
Administration, Stormwater Management Branch. Washington, D.C. 1993.
NCDENR STORMWATER BMP MANUAL DOC
3206

NORRIS, KUSKE &TUNSTALL
CONSULTING ENGINEERS, INC.
June 29, 2005
Mr. Cameron Weaver, Express Review Coordinator
NC DENR Division of Water Quality
127 Cardinal Drive Extension
Wilmington, NC 28405-3845
Re: State Stormwater Express Permit Submittal
PPD Corporate Headquarters
Wilmington, NC
NKT Project No. 04268
Dear Mr. Weaver:
J. Phillip Norris, P.E.
John A. Kuske, III, P.E.
John S. Tunstall, P.E.
J.A. Kuske, P.E. of Counsel
Enclosed are two (2) sets of plans for the subject project, one (1) drainage area basin
delineation plan, one (1) set of calculations, one (1) copy of the stormwater narrative,
the original Division of Water Quality Stormwater Management Permit application, and
a $4,000.00 check for the express permit review fee.
Please review this information for approval and contact us with any questions or
comments you may have. Thank you for your assistance on this project.
Sincerely,
NORRIS, KUSKE, & TUNSTALL
CONSULTING ENGINEERS, INC.
I PbX
n S. Tunstall. P. E.
JST/kbh
06-29-05-s-sw express-Itr
Enclosures
cc: Linda Lewis / NC DENR
D504V71
902 Market Street • Wilmington, NC 28401-4733 9 Phone: [phone] • Fax: [phone]

O6/22/2005 WED 14:35 FAX [phone] Norris,
1VORRIS, KUSKE & TUNSTALL
CONSULTING ENGINEERS, INC.
Kuske, Tunstall
John S. Tunstall, P.E.
Kent P.:Harrell; P.E.
James T. Pvrtle. P.E.
Z 001/010
J. Phillip Norris, P.E.
John A. Kuske, III, P.E.
J.A. Kuske, P.E.
902 Market Street • Wilmington, NC 28401-4733 • Phone [phone] • Fax [phone]
E-Mail: [e-mail]
LETTER OF TRANSMITTAL & / 6� 0 '
To:
Cameron Weaver, Express Review Coordinator
Date: June 22, 2005
Joe No. 04258
NC DENR
subject: PPD Corporate Headquarters
WE ARE SENDING YOU VIA FAX
❑ ATTACHED ❑ UNDER SEPARATE COVER
❑ SHOP DRAWINGS ❑ PRINTS ❑ TRACINGS
❑ SPECIFICATIONS ❑DISKS ❑ COPY OF LETTER
;:f% (.;;,;TRANSMIZ7AL ;' ��INI::JIVIBER•.'"'OF :•F.1iGE;S,
................... ...............".....................,............. _
LUD'ING,THIS TRA�NSINt"TTAL" .:_ ..
INC ....... .,'.....: - ..
_ .
-Call. .any ........::.:.
3- -if_ you:;--have-
3 S rrless "
.td --"- -
COPIES
DATE
NO.
DESCRIPTION
1
Request for Express Permit Review ( review is scheduled for June 30th at 9 am )
1
Stormwater System & Erosion Control Narrative
1
Vicinity Map
❑
®
AS REQUESTED
FOR YOUR USE
❑ FOR REVIEW AND COMMENT, , ❑. FOR APPROVAL
❑ FOR BIDS DUE ❑ YOUR PRINTS LOANED TO US
REMARKS.-
CC: SIGNED John S. Tunstall, P.E., /Kbh
CONFIDENTIAL AND PRIVILEGED: Information contained in this document is privileged and confidential, Intended for the sole use of the
addressee. If you are not the addressee or the person responsible for delivering It to the addressee you are hereby notified that any dissemination,
distribution or copying of this document is strictly prohibited. If you have received this document in error please immediately notify the sender and
return to the address above.

06/22/2005 WED 14:35 FAX [phone] Norris, Kuske, Tastall
9002/010
North Carolina De artment ofnt of E- t and P Natural Resources
127 Cardinal Drive Extension, Wilmington, NC 28405 [phone] FAX [phone]
Request for Express Permit Review
NKT # 04268
FILL-IN all information below and CHECK required Permit(s).
FAX to Cameron Weaver along with a narrative and vicinity map of the project location.
Projects must be submitted by 9:00 A.M. of the review date, unless prior arrangements are made.
APPLICANT Name_ Fred B. Davenport, Jr., Vice President
Address 3151 South 17th Street City/State—Wilmington, NC_Zip 28412 County New Hanover
Phone [phone]Fax N/A Email N/A
PROJECT Name PPD Corporate Headquarters
ENGINEERICONSULTANT John S. Tunstall, P.E.
Address 902 Market Street City/State Wilmington, NC_ Zip 28401 County New Hanover
Phone [phone] Fax [phone] Email itunstall(o)nkteng.com
❑ STREAM ORIGINATION CERTIFICATION
... _........
-
® STORMWATER ❑ Low Density ❑ High Density -Detention Pond ❑ High Density -Other
❑ Low Density -Curb & Gutter ❑ High Density -Infiltration ❑ Off site
' Redevelopment
---------------
❑ COASTAL, ❑ Excavation & Fill ❑ Bridges & Culverts ❑ Structures Information
MANAGEMENT ❑ Upland Development ❑ Marina Development ❑ Urban Waterfront
LAND QUALITY ❑ Erosion and Sedimentation Control Plan with acres to be disturbed
❑ WETLANDS (401) ❑ No Wetlands on Site (letter from COE) ❑Wetlands Delineated/No JD
❑ Greater than 0.1 AC Wetlands Impacted ❑Jurisdictional Determination has been done
❑ Less than 0.1 AC Wetlands Impacted ❑Greater than 0.5 AC Wetlands Impacted
The legislation allows additional fees, not to exceed 50% of the original Express Review permit application
fee, to be charged for subsequent reviews due to the insufficiency of the permit applications.
rot DENR use Drily
SUBMITTAL DATES:
Fee Split for multiple permits:
SW
$
CAMA
$
LOS
$
401
$
Total Fee Amount $ '

06/22/2005 WED 14:35 FAX [phone] Norris, Kuske, Tunstall
Z003/010
STORMWATER SYSTEM & EROSION CONTROL NARRATIVE
PPD CORPORATE HEADQUARTERS
929 N. FRONT STREET
WILMINGTON, NC 28401
For
River Ventures, LLC
3151 South 17'" Street
Wilmington, NC 28412
[phone]
S• Tl
0101014
June 2005
Prepared by:
NORRIS, KUSKE, & TUNSTALL CONSULTING ENGINEERS, INC.
902 Market Street
Wilmington, North Carolina 28401
[phone]
[phone] (Fax)
E-mail: [e-mail]
NKT Project No. 04268

06/22/2005 WED 14:35 FAX [phone] Norris, Kuske, Tunstall j004/010
NARRATIVE NKT PROJECT NO.04268 PPD Corporate Headquarters
DESCRIPTION:
The PPD project site is a 7.48 acres tract located at 929 North Front Street,
Wilmington, NC. The soils of the site consist of sands and silty sands with grades ranging
from 1% to 7%. Approximately 7.5 acres will be graded to allow construction of the new
PPD Corporate Headquarters building with paved parking and paved access. In addition to
the 7.48 acres tract, the 3.12+/- acres tract to the north will be used as construction laydown
area and stockpile area. The runoff from the site is estimated using the rational method 10-
year design storm and rainfall data for the area. Construction is scheduled to begin as soon
as all permits and approvals are obtained.
The project consists of a 13 story building with 2 parking levels below grade and a
surface parking and 2 access drives. Approximately 10.6 acres total will be disturbed for
the construction of the new building.
EROSION CONTROL MEASURES:
The attached plans and specifications give the requirements for erosion control
measures. Silt fencing will be provided along the north & western sides of the site where
stormwater would be expected to sheet flow from disturbed areas directly to adjacent
property. The temporary sediment trap is designed for the south 4.93 acres of the site
(surface parking area and future development area shown on plan to be filled during Phase
1). The north 2.55 acres of the site will be excavated to elevation 8 for the 2 parking decks
below the building. All sediment from a rain event will be trapped within the building
excavation. A silt basin/ temporary sediment trap will be constructed 'on the south west
portion of the site during construction and restored to its design contours prior to
completion. Prior to building excavation the southwest portion of site shall be bermed to
elevation 13.0. A temporary silt fence will be provided on the west side of this temporary
berm. Gravel construction entrances will be constructed as shown on the plans.
Maintenance will be provided by the grading contractor and developer.
STORMWATER MANAGEMENT MEASURES:
The project site is located in New Hanover County. Land disturbing on the site will
exceed one acre, which requires the site to comply with the City & State regulations. The
site is classified as a redevelopment site by NCDENR. The stormwater runoff from the
surface parking area of the development 3.03 acres will be directed to two sand filters. The
building and some sidewalks of the development will be routed to another_ sand filter.
CONSTRUCTION SEQUENCE:
The Contractor will install the gravel construction entrance and silt fence prior to
beginning any clearing and grading operations. Additional silt fence will -be installed when
and if conditions warrant during construction. Prior to grading operations the temporary
berm/sediment trap will be constructed immediately along with the outlet structure with
protection. Disturbed areas will be landscaped or seeded upon completion.

06/22/2005 WED 14:35 FAX [phone] Norris, Kuske, Tunstall
Z005/010
EROSION CONTROL NOTES AND MAINTENANCE PLAN,
1. Install erosion control measures before beginning construction or as soon
thereafter as possible. All erosion and sediment control practices 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 practices as designed.
2. Maintain the gravel construction entrances in a condition to prevent mud or
sediment from leaving the construction site. The contractorshall. inspect the
construction entrances on a daily basis. This will require periodic'top dressing
with additional No. 4 stone. Any objectionable materials spilled, washed, or
tracked onto public roadways shall be removed immediately.
3. Install erosion control measures around the drop inlets as shown on the plans to
trap silt during construction. Inspect the erosion control around the inlets after
each rain and make repairs immediately. Remove sediment°when it becomes
0.50 deep to provide adequate storage volume for subsequent rains. When the
contributing drainage area has been adequately stabilized, remove all materials
and any unstable soil and either salvage or dispose of it properly. Bring the
disturbed area to proper grade and appropriately stabilize all bare areas around
the drop inlets.
4. Sediment will be removed from behind the silt fence when it becomes 0.5 feet
deep at the fence. The sediment fence will be repaired as necessary to maintain
a barrier. Silt fence stakes shall be spaced 6 feet apart unless a wire backing is
used with 8 foot stake spacing.
5. Inspect temporary sediment traps / check dams after each period �of significant
rainfall. Remove sediment and restore the trap to its original dimensions when
the sediment has accumulated to one-half the design depth of the trap_ Place
the sediment that is removed in the designated disposal area and replace the
contaminated part of the gravel facing. Check the structure for damage from
erosion or piping. Periodically check the depth of the spillway to ensure it is a
minimum of 1.5 ft below the low point of the embankment. Immediately fill any
settlement of the embankment to slightly above design grade. Any riprap
displaced from the spillway must be replaced immediately. After all sediment -
producing areas have been permanently stabilized, remove the structure and all
unstable sediment. Smooth the area to blend with the adjoining areas and
stabilize properly.
6. No cut or fill slopes shall exceed a side slope of 1wvertical to 3°horizontal unless
otherwise specified on the plan. All slopes shall be seeded and stabilized within
15 days.

06/22/2005 WED 14:36 FAX [phone] Norris, Kuske, Tunstall
� 006/010
7. All disturbed areas shall be seeded within 15 days of disturbance_ All seeded
areas will be fertilized, reseeded as necessary and mulched according to
specifications in the vegetative plan to maintain a vigorous, dense vegetative
cover.
B. More stringent measures shall be used to haft erosion if those shown on this plan
are not effective.
9. All erosion shall be controlled including side slopes before the project is
completed.
10. Remove temporary measures upon completion of project. All permanent
measures will be well established before project closeout.
d

06/22/2005 WED 14:36 FAI 910 343 9604 Norris, Kuske, Tunstall
a007/010
SECTION 02920
SOIL EROSION AND SEDIMENTATION CONTROL
1. GENERAL
1.1 Contractor shall take every reasonable precaution throughout construction, to
prevent the erosion of soil and the sedimentation of streams, lakes, reservoirs, other
water impoundments, ground surfaces, or other property as required by State and Local
regulations. . . . V
12 The Contractor shall install all required silt fences, and construction entrances at
the initiation of work, and have these measures reviewed and approved by the local
permit authority prior to clearing and grading operations.
1.3 The Contractor shall, within 15 days of suspension or completion of land
disturbing activities, provide permanent protective covering for • disturbed areas.
Temporary and permanent erosion control measures shall be coordinated to assure
economical, effective, and continuous erosion and siltation control throughout the
construction and post -construction period. Use the specified seed for both temporary and
permanent seeding.
2. PRODUCTS
2.1 Asphalt for anchoring mulch shall be Type SS-1 Emulsion. 9
4
2.2 Fertilizer shall be 10-10-10 grade or equivalent.
2.3 Lime shall be dolomitic agricultural ground limestone containing not less than 10
percent magnesium oxide.
2.4 Mulch shall be small grain straw, hay, wood chips, asphalt emulsion, jute. or other
suitable material free of undesirable weed seed.
2.5 Phosphate shall be 20 percent superphosphate or equivalent.
F
2.6 Seed shall be 20% carpet grass, 24% Bermuda, 20% turf Fescue, 10% Creeping
Red Fescue, and 24% Annual Rye grain. Bermuda seed shall be hulled for warm
weather planting and unhulled for cool weather planting. ' Purity of'seed shall be a
minimum of 98 percent and germination shall be a minimum of 85 percent.
2.7 Silt fence 'shall consist of NCDOT Class Afabric supported°metal'posts spaced
not more than 6 feet on center. The bottom of the fabric shall be buried a minimum of 6
inches. See details on plans.
,s
cg

06/22/2005 WED 14:36 FAX [phone] Norris, Kuske, Tunstall 9008/010
2.8 Gravel for check dams shall be #57 washed stone.
2.9 Aggregate for construction entrance shall be #4 washed stone!
2,10 Stone rip rap for check dams and erosion control shall be NCDOT
Class A or B as shown. See detail Sheet C3 for specific Erosion Control
products. ,
3. EXECUTION ,
3.1 General: Take every practicable measure during construction or suspension to
work to minimize erosion and siltation. Measures should include good -construction
practices, temporary physical barriers to sediment travel, settling basins foi-new ditches,
and establishment of vegetative cover.
32 Construction Practices
3.2.1 Avoid dumping soil or sediment into any wetland or watercourse.
3.2.2 Maintain an undisturbed vegetative buffer where possible between a natural
watercourse and trenching and grading operations.
3.2.3 Avoid equipment crossings of streams, creeks, and ditches where practicable.
3.2.4 Grade all cut, fill and ditch slopes to minimum slope of 3:1; unless otherwise
shown or directed.
3.3 Temporary Physical Barriers are required where sedimentation' on off site
property or excessive erosion is a problem.
' d , ,.d. . -
3.3.1 Mulch shall be used for temporary stabilization of areas subject,to excessive
erosion and for protection of seedbeds after planting where required.
1. Apply grain straw and hay at a rate of 75 to 100 pounds per lobo square feet
and wood chips at a rate of 500 pounds per 1000 square feet_ Jute and mesh
should be installed as per manufacturer's instructions.
2. Asphalt emulsion for slope stabilization should be applied'at a rate of 1,000
gallons per acre. Asphalt emulsion used for anchoring straw should be
applied at a rate of 150 gallons per ton of straw.
3.3.2 Silt Fences shall be used at the base of slopes to restrict movement of sediment
from the site. Clean silt fence of accumulated sediment after each rainfall event or
when it exceeds a depth of 0.5 feet above natural grade. _i " 1a.

06/22/2005 WED 14:36 FAX [phone] Norris, Kuske, Tunstall 009/010
3.3.3 Stone Check Dams, placed at the discharges of creeks, ditches, and swales,
shall consist of Class A rip rap at minimum two feet high and three feet thick across the
watercourse, with a one foot thick layer of gravel on upstream side. Remove sediment if
accumulated to a depth of 1.0 feet at upstream face.
3A Vegetative Cover: Establish and maintain permanent vegetative cover on all
unpaved areas disturbed by the work.
3.4.1 Preparation of Seedbed: Areas to be seeded shall be scarified to a depth of 4
inches and until a firm, well pulverized, uniform seedbed,is'prepared. r,Lime;�phosphorous
and fertilizer shall be applied during the scarification process in a'ccbrdance with the
following rates:
Lime: 45 pounds per 1000 square feet
Phosphorous: 20 pounds per 1000 square feet
Fertilizer: 17 pounds per 1000 square feet
3.4.2 Seeding: Disturbed areas shall be seeded with 2 to 3 pounds per 1000 square
feet of the specified seed mixture. Seed shall be worked into the bed to a depth of 1/4
inch. Regrade and seed eroded areas immediately s
3.4.3 Mulch all areas immediately after seeding. Mulch shall be applied and anchored
as specified hereinbefore. Reapply as necessary to retain cover until grass is
established. "'
3.5 Construction Entrance: Provide an aggregate drive, 20 feet wide by.50 feet long
by 6 inches thick at each entrance to the site used by construction vehicles, until such
time as the permanent roadway is constructed. Remove soil if accumulated to a depth
greater than 0.5 inches.
3.6 Maintenance: The Owner and Contractor shall be responsible for maintaining all
temporary and permanent erosion control measures. Temporary structures shall be
maintained until such time as vegetation is firmly established in thera?ea protected by
the structure. Permanent streambank protection and grassed areas shall be
maintained until completion of the project. Areas that fail to,show a suitable stand of
grass or which are damaged by erosion shall be imrriediatbly'rbpaired: ' ' ;
END OF SECTION
. A

O6/22/2005 WED 14:36 FAX [phone] Norris, Kuske, Tunstall
4!
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