SW8050427_HISTORICAL FILE_20060221

STORMWATER DIVISION CODING SHEET
POST -CONSTRUCTION PERMITS
PERMIT NO.
SW8 05y4?_-j
DOC TYPE
❑ CURRENT PERMIT
❑ APPROVED PLANS
HISTORICAL FILE
❑ COMPLIANCE EVALUATION INSPECTION
DOC DATE
2001V 0221
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
February 21, 2006
PPD GP, LLC, General Partner
PPD Development, LP, Sole Manager
River Ventures, LLC
Mr. Fred Davenport, Jr., Vice President
3151 South 17`n Street
Wilmington, NC 28412
Subject: Stormwater Permit No. SW8 050427 Modification
PPD Parking Garage (formerly North Riverfront Parking Garage)
High Density Project
New Hanover County
Dear Mr. Davenport:
The Wilmington Regional Office received a complete Stormwater Management Permit Application for
PPD Parking Garage (formerly North Riverfront Parking Garage) on February 14, 2006. Staff review of
the plans and specifications has determined that the project, as proposed, will comply with the
Stormwater Regulations set forth in Title 15A NCAC 2H.1000. We are forwarding Permit No. SW8
050427 Modification dated February 21, 2006, for the construction of the subject project.
This permit shall be effective from the date of issuance until February 21, 2016, 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].
Sincerely,
?ra-
Edward Beck
Regional Supervisor
Surface Water Protection Section
-- —_-- ENB/ptb:--==-S.\WQS\STORMWATER\PERMIT\050427Mod:feb06----- --- - --=-
cc: Mark T. Arcuri, P.E., Criser Troutman Tanner Consulting Engineers
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.
Wilmington Regional Office
Central Files
1 1A
North Carotin Division of Water Quality 127 Cardinal Drive Extension Phone [phone] Customer Servicel-877-623-6748
Wilmington Regional Office Wilmington, NC 28405-3845 FAX [phone] Imemet h2o.encstate.nc.us
An Equal OpportunitylAffrmauve Action Employer- 50% Recycled110% Post Consumer Paper
NoorthCarolina
Aatura!!y

State Stormwater Management Systems
Permit No. SW8 050427 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
Mr. Fred Davenport, Jr. and River Ventures, LLC
PPD Parking Garage (formerly North Riverfront Parking Garage)
New Hanover County
FOR THE
construction, operation and maintenance of an underground infiltration trench 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 modifies the original Permit No. SW8 050427, issued May 23, 2005, by:
(1) changing the permittee from City of Wilmington, Sterling B. Cheatham, City Manager
to River Ventures, LLC, Fred Davenport, Jr., Vice President;
(2) changing the project name from North Riverfront Parking Garage to PPD Parking
Garage;
(3) reducing the drainage area and impervious area, each previously 67,340 sq ft, to
65,679 sq ft each; and
(4) modifying the infiltration trench system configuration and increasing the number of
StormChamberT"" units from 80 to 145 at 115 ft3 of design storage each.
This permit shall be effective from the date of issuance until February 21, 2016 and
shall be subject to the following specified conditions and limitations:
I. DESIGN STANDARDS
This permit is effective only with respect to the nature and volume of stormwater
described in the application and other supporting data.
2. This stormwater system has been approved for the management of stormwater
runoff as described in Section 1.6 on page 3 of this permit. The stormwater
control has been designed to handle the runoff from 65,679 square feet of
impervious area. This trench is designed for a 2-inch storm event and
stormwater in excess of the 2-inch event bypasses the trench and discharges to
the City stormwater system.
Page 2 of 7

State Stormwater Management Systems
Permit No. SW8 050427 Modification
3. The tract will be limited to the amount of built -upon area indicated on page 3 of
this permit, and per approved plans. There is no allotment for future built -upon
area at the site.
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.
6. The following design criteria have been provided
in the infiltration trench and
must be maintained at design condition:
a. Drainage Area, acres:
1.51
Onsite, ft2:
65,679
Offsite, ft2:
none
b. Total Impervious Surfaces, ft2:
65,679
C. Design Storm, inches:
2.0
d. Trench Dimensions, L x W x H, ft:
North:
85 x 37 x 4.33
South:
125 x 31 x 4.33
e. Number of StormChamberTM units:
145 at 115 ft3 each
f. Bottom Elevation, NGVD:
22.0
g. Bypass Weir Elevation, NGVD:
26.33
h. Permitted Storage Volume, ft3:
18,000
i. Type of Soil:
Sand
j. Expected Infiltration Rate, in/hr:
9.1
k. Seasonal High Water Table, NGVD:
20
I. Time to Draw Down, hours:
2.1
M. Receiving Stream/River Basin:
Cape Fear River / Cape Fear
n. Stream Index Number:
18-74-(61)
o. Classification of Water Body:
"SC; Sw"
II. SCHEDULE OF COMPLIANCE
1. The stormwater management system shall be constructed in its entirety,
vegetated and operational for its intended use prior to the construction of any
built -upon surface.
2. During construction, erosion shall be kept to a minimum and any eroded areas of
the system will be repaired immediately.
Page 3 of 7

State Stormwater Management Systems
Permit No. SW8 050427 Modification
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. Immediate repair of eroded areas.
d. Maintenance of all slopes in accordance with approved plans and
specifications.
e. Debris removal and unclogging of bypass structure, filter media, flow
spreader, catch basins, and piping.
f. A clear access path to the bypass structure must be available at all times.
g. No chemicals added to the solution for pressure -washing surfaces.
4. Records of maintenance activities must be kept and made available upon
request to authorized personnel of DWQ. The records will indicate the date,
activity, name of person performing the work and what actions were taken.
5. The facilities shall be constructed as shown on the approved plans. This permit
shall become voidable unless the facilities are constructed in accordance with
the conditions of this permit, the approved plans and specifications, and other
supporting data.
Upon completion of construction, prior to issuance of a Certificate of Occupancy,
and prior to operation of this permitted facility, a certification must be received
from an appropriate designer for the system installed certifying that the permitted
facility has been installed in accordance with this permit, the approved plans and
specifications, and other supporting documentation. Any deviations from the
approved plans and specifications must be noted on the Certification. A
modification may be required for those deviations.
7. If the stormwater system was used as an Erosion Control device, it must be
restored to design condition prior to operation as a stormwater treatment device,
and prior to occupancy of the facility.
8. Access to the stormwater facilities shall be maintained via appropriate
easements at all times.
9. The permittee shall submit to the Director and shall have received approval for
revised plans, specifications, and calculations prior to construction, for any
modification to the approved plans, including, but not limited to, those listed
below:
a. Any revision to any item shown on the approved plans, including the
stormwater management measures, built -upon area, details, etc.
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.
Page 4 of 7

State Stormwater Management Systems
Permit No. SW8 050427 Modification
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.
2. Failure to abide by the conditions and limitations contained in this permit may
subject the Permittee to enforcement action by the Division of Water Quality, in
accordance with North Carolina General Statute 143-215.6A to 143-215.6C.
3. The issuance of this permit does not preclude the Permittee from complying with
any and all statutes, rules, regulations, or ordinances, which 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.
6. The permit may be modified, revoked and reissued or terminated for cause. The
filing of a request for a permit modification, revocation and reissuance or
termination does not stay any permit condition.
7. Unless specified elsewhere, permanent seeding requirements for the stormwater
control must follow the guidelines established in the North Carolina Erosion and
Sediment Control Planning and Design Manual.
8. Approved plans and specifications for this project are incorporated by reference
and are enforceable parts of the permit.
9. The permittee shall notify the Division any name, ownership or mailing address
changes within 30 days.
Permit issued this the 21 st day of February 2006.
NORTH fc/{ NAA ONMENTAL MANAGEMENT COMMISSION
Division of Water Quality
By Authority of the Environmental Management Commission
Page 5 of 7

State Stormwater Management Systems
Permit No. SW8 050427 Modification
PPD Parking Garage (formerly North Riverfront Parking Garage)
Stormwater Permit No. SW8 050427 Modification, February 21, 2006
New Hanover County
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 6 of 7

State Stormwater Management Systems
Permit No. SW8 050427 Modification
W"
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
Page 7 of 7

" •• OFFICE USE ONLY
" Date Received '
Fee Paid
Permit Number
-
-o�I
Jr 4
DOU
ON4
i
sd:1
MJ
State of North Carolina
Department of Environment and Natural Resources
Division of Water Quality
STORMWATER MANAGEMENT PERMIT APPLICATION FORM
This form may be photocopied for use as an original
I. GENERAL INFORMATION
1.. Applicants name (specify the name of the corporation, individual, etc. who owns the project):
fZnlErt�yr...;rr.,2�g ILL
2: Print Owner/Signing Official's name and title (person legally responsible for facility and compliance):
'J2 V I C.E PAE51yee T
3. Mailing Address for person listed in item 2 above:
3t51 Sou�rFF " 1'Y�` �tt��'f
City, W t l.M ih1Ca'1•C� State:�__ zip:
4. Project Name (subdivision, facility, or establishment name -should be consistent with project name on plans,
specifications, letters, operation and maintenance agreements, etc.):
PPD PA104" K16 CAORAGE
L
5. Location" of Project'(streetaddeess):
". _- , _ .; si=r; ���'�_'� i,;.Fj`(Lu Ic1 SV►I IG..KJTt�'cE 1 __
Giiy: uJ1t:aCounty: MEW l4&P4oV BIZ
6. Directions to project (from nearest major intersection):
1 'IY' A"r IT1T�2��-t'TipA( OF- 82uMS1A1tCX ANI!�,
S:zta�l9 S'T2cE`r'S
7. Latitude: AI D IQ ,4?. , Longitude: W V 561 S.S' of project
. ':.:i �.` p..:?:,ii2':Jr �-`.•�i Y1 �uN#!a�YA i d•.. a... -. '
-.8., Contact petsort_wlio can answer questions about the project:
Name: Art4 IEJ Telephone Number: ( 910 ) j9 7' V Z09
II, PERMIT INFORMATION:
1. Specify whether project is (check"one):, New Renewal !L Modification
' V:IY.. '."'KM1�)`•4TslYP�%NIA�3M,.AL%,'.^,. :
Form SWU-101 'Version 3.99 Page 1 of 4

2. If this application ls;being submitted as'the rgsultt f a renewal or modification to an existing permit, list the
existing permit number 5 W 8" Q �04 it and its issue date (if known) AYZ 1710 6
3. Specify the type of project (check one):
_Low Density iC High Density _Redevelop _General Permit _Other
4. Additional Project Requirements (check applicable blanks):.
_CAMA Major 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.
111. PR6JEa— t"RMATION ,
1. In the space provided below, summarize how stormwater will be treated. Also attach a detailed narrative
(one to two pages) describing stormwateir management for the project.
_,.Sio)�MWk`15r — .��' 'L�DC+�25 tAIIU RSc RouTF rto
G Y O;ti c in�icny''.` asi l fGJul - iZA04met i'�I» ow1C� wild- i w1FtL.Tt2A4TE_
Yatt�� W I U.- B�(PAX �b G1T';( �t"o2Mu.IbET�1L I M St2icrc"'r"
2.. Stormwater.ndribff;from this project drains to the CA 79, IE:rr.2 River basin.
3. Total Project Area: � .12- acres
4. Project Built Upon Area: 8$
5: How many drainage.areas does the project have?
-S."'Cotnplete•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 Informtio ansCs; F4- X =7.
+A Dramage'Area 1 .
�:
Drainage Area 2,
Receiving Stream Name
44„�1i,re r_ t yGZ
Receiving Stream Class
5cG
Drainage ATea,. .... _.
6 S `( q
Existing ImPeivtQus=Area_;:
___p +0 MA ild
.. _.
Froposed"Impeious,Area-:
%Impervious Area (total)
100�
- :'f,,a e. ,:am.v.:,.,
Impervious Surface Area�-,�,
r ;-'•'
,2 h''`�;1���� �IJ�rainage�Area 1 �. '_ '
� Drainage Area 2'
On -site Buildings
S 'S
On -site Streets
AO
On -site, P,arking4,.,,;i
On-site-
Other.on'ske
O
Off -site
- Q
_
Total: (pS 611
Total:
» Impervious area is defined as'the built upon area including, but not limited to, buildings, roads, parking areas,
sidewalks, gravel areas, etc.
FormSWU-101 Version'=3.99 —, Page 2 of 4
w

7. How was the off -site impervious area listed above derived?
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 fi wing..covenants'are intended to ensure ongoing compliance with state stormwater management permit number
`*" "•' P ` ` "' as issued by the Division of Water Quality. These covenants may not be "
changed or'deliked iviiNonritie'consehf'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 of swimming pools.
3_. Swales shall not be filled In, piped, or altered except as necessary to provide driveway crossings.
4. Bunt -upon aieq in ezcess.of the permitted amount requires a state stormwater management permit, modification prior to
construction.
5. All permitted runoff from outparcels or future development shall be directed Into the permitted stormwater control
system. These connections to the stormwater control system shall be 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'[he applicable items required above, that the covenants will be binding on all parties and persons
claiming undenthem;,that they will•run with the land, that the required covenants cannot be changed or deleted
without concurrence from tfie State,.arid 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 availabilityof fhese'forms.
FormSWU-102 ` 'WecDetentionBasin Supplement
Form SWU-103 Infltration Basin Supplement
Form SWU-104 Low -Density Supplement
Form SWU-105, Curb'Outlet System Supplement
Form SWU-106 Off -Site System Supplement
Form SWU-107 Underground Infiltration Trench Supplement
Form SWU-108 Neuse River Basin Supplement -
Form SWU-109 'Innovative Best Management Practice Supplement
i.-'+:?tx'ei,°ten ;:h•,�i,t'.�`, ..':-.:vri•,�,rr.�,4:;:•:
. ..
Form S WU-101 ' Version 3.99 Page 3 of 4

VI. SUBMITTAL REQUIREMENTS.
-On ' ly 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 ,approprlateDWQ,Regional Office.
1. Please indicate that you have provided the following required information by initialing in the space provided
next to each item,
_ Initials
• Original and one copy of the Stormwater Management Permit Application Form (JITlR
• One copy of the applicable Supplement Form(s) for each BMP MTft<
• Permit application processing fee of4426•tpayable to NCDENR) A'4-, V90
_ • Detailed narrative description of stormwater treatment/management
• Two co ies'oflans and specifications, including: pATAr
:✓ ?eke t ritJ'F?ivjecc 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
^Origin.contours;,proposed'contours, spoteleva[lons,finishedfloor elevations
ZJDetails ofroads: drainage' features, collection systems; and stormwater control measures
Wetlands delineated; or a note on plans that none exist
- Existing drainage (including off -site), drainage easements_pipe sizes, runoff calculations
- Drainage areas delineated
- - Vegetated buffers (where required)
VII: AGENT AUTHORIZATION
If you,wishto deSigna[a afithority;to,another individual or firm so that they may provide information on your
behalf,"pleasepm" lete;thissection: -.
MA21C 'T P.Rt-iA21 PE
Designated agent (individual or firm): e4L.IeEY2- •}iLOIATMl9 4 TA-11VCt - L061Y7. F-A* -
Mailing Address: _ 1 ` p.LiF'(M9S ��i� . _Jy \'ram t O Z►
City:yi'Lowt46! 4 __. State: roc + Zip: 'Z6403
Phone: ( 01 O ) .39.Z'' V9Z9 Fax: ( 9 t O , 397 - Z9 i l
VIII: APPIACANT'giCHRTIFICATION_ -
I, (print or gWname:o-f person listed in General Information, item 2)
certify that the information included on this permit application
that the projecOAfill be constructed in confo ante w th a ap
and protective covenants wlllpeyecaided qhd thatF se
NCAC 2H .1000. % (/ //
Form.SWU-101 Version 3:99. Page 4 of 4
is, to the best of my knowledge, correct and
wed plans, that the required deed restrictions
project complies with the requirements of 15A
Date: C7( "'.2$ •OCo

j14 06 08:56a Criser Troutman Tanner Co
910-397-2971
FAX MEMORANDUM
C R I S E R
TROUTMAN
T A N N E R
COMPA_N—Y, SLAj
DATE: _1 L) —D
FAX NUMBER
3S0 —2�04
70TAL NO. OF PAGES INCLUDING COVER:
L—
PHONE NVM 6EP. _
q
CTT'S PROJECT NUMBER'
``7C/G v
RE:
CLIENT'S REFERENCE NllMBER:
V
❑ URGENT ❑ FORREJIEW ❑ PLEASE COMMEN7' ❑ PLEASE REPLY ❑ FOR YOUR INFORMATION
NOTES/COMMENTS:
d5CE- Kk� V f401 Mom` � fl\ u�L aooi-,
Sincerely yours,
CRISER TROUTMAN TANNER CONSULTING ENGINEERS
POST OFFICE BOX 37^7 WILN-IINGTON. NC 23406
3809 PEACHTR EE AVE. SUITE 102 LNILM!NGTON, NC 28403
P410.397.2929 F910.39-72971
F,CEIV]ED
FEB 1 4+ Zoo,
CRISER TROUTMAN TANNER CONSULTING ENGINEERS
Post Othce Box 3727 Wdmmgton, NC 28412 ' 3SO9 Peachtree Ave. Suite 102 Wilmington, NC 23403 p 910.397.2S29 f 910.397.2971

Fej 14 06 08:56a Criser Troutman Tanner Co 910-397-2971 p.2
a
CERTIFICATE
The undersigned, being the sole Manager of River Ventures, LLC, a North
Carolina limited liability company, hereby certifies as follows:
1. That the Operating Agreement of River Ventures, LLC authorizes the sole
Manager to elect officers who have authority to act on behalf of River Ventures, LLC;
and
2. That Fred B. Davenport, Jr. is the duly elected and incumbent Vice
President of River Ventures, LLC and is authorized to sign the Stormwater Permit on
behalf of Rivet Ventures, LLC.
2005.
1N WITNESS WHEREOF, this Certificate was signed this 190 day of April,
PPD DEVELOPMENT, LP
Sole Manager of River Ventures, LLC
By: PPD GP, LLC
General Partner of PPD Development, LP
By.
Name: B. udd Hartman
Title: General Counsel and Secretary
t00-d ZOO Z11-1 E90LU1018+
ONI Odd-=Jd W22ra0 900Z-6l-Pd

P. 1
FILE MODE
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803 MEMORY TX
* * * COMMUNICATION RESULT REPORT ( FEB.13.2006
OPTION
REASON FOR ERROR
E-1) HANG UP OR LINE FAIL
E-3) NO ANSWER
ADDRESS (GROUP)
---------------
93972971
5:42PM ) * * *
TTI NCDENR WIRO
RESULT PAGE
--------------------------
OK P. 2/2
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
Date: 2/13106
To: Mark Arcuri
Company: CTT
FAX M [phone]
William G. Ross, Jr., Secretary
FAX COVER SHEET
No. of Pages: 2 (Incl. Cover)
From: Paul Bartlett
Water Quality Section -
Stormwater
FAX #: [phone]
Phone #: [phone]
DWQ Stormwater Project Number: SW8 050427 Modification
Project Name: PPD Parking Garage
MESSAGE:
Mark,
A Request for Additional Information is attached for the subject project. The original will
be mailed to Mr. Davenport, and a copy will be mailed to you.
/% 4

.3
State of North Carolina
Department of Environment and Natural Resources
Wilmington Regional Office
Michael F. Easley, Governor
Date: 2/13/06
To: Mark Arcuri
Company: CTT
FAX #: [phone]
William G. Ross, Jr., Secretary
FAX COVER SHEET
No. of Pages: 2 (Incl. Cover)
From: Paul Bartlett
Water Quality Section -
Stormwater
FAX #: [phone]
Phone #: [phone]
DWQ Stormwater Project Number: SW8 050427 Modification
Project Name: PPD Parking Garage
MESSAGE:
Mark,
A Request for Additional Information is attached for the subject project. The original will
be mailed to Mr. Davenport, and a copy will be mailed to you.
1 G
ENB\ptb: S:\WQS\STORMWATER\ADDINFO\2006\050427Mod.feb06
127 Cardinal Drive Extension, Wilmington, NC 28405-3845 Telephone [phone] FAX [phone]
An Equal Opportunity Affirmative Action Employer

..
W A7FR
0
� —
February 13, 2006
Mr. Fred Davenport, Jr
River Ventures LLC
3151 South 17th Street
Wilmington, NC 28412
Subject: Request for Additional
Stormwater Project No.
PPD Parking Garage
New Hanover County
Dear Mr. Davenport
Michael F. Easley, Governor
William G. Ross, Jr., Secretary
North Carolina Department of Environment and Natural Resources
Information
SW8 050427 Modification
Alan W. Klimek, P.E. Director
Division of Water Quality
The Wilmington Regional Office received a Stormwater Management Permit Application for
PPD Parking Garage on February 1, 2006. A preliminary review of that information has
determined that the application is not complete. The following information is needed to,
continue the stormwater review:
provide documentation that you are registered with the NC Department of
retary of State as a "Manager" of River Ventures, LLC since the LLC is
edylas a "Manager -managed" LLC and revise the title in Section 1.2 of the
Please n�e that ttYs request for additional information is in response to a preliminary review.
The requ, sted information should be received by this Office prior to February 21, 2006, 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.
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].
Sincefely,
Paul T. Bartlett, P.E.
Environmental Engineer
ENB/ptb: S:\WQS\STORMWATER\ADDINFO\2006\050427Mod.feb06
cc: Mark T. Arcuri, P.E., Criser Troutman Tanner Consulting Engineers
Paul Bartlett
North Carolina Division of Water Quality 127 Cardinal Drive Extension Phone [phone] Customer Servicel-877 623-6748
Wilmington Regional Office Wilmington, NC 28405-3845 FAX [phone] Internet. h2o.enrstate.nc.us One
NorthCarolina
An Equal OpportumtylAffrmative Action Employer- 50 % Recycled110 % Post Consumer Paper Natura"I/

Page 1 of 1
W ib ,-05-04�7Mi-1)
Elaine F Marshall
Secretary
Corporations
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(/ /OW. 017 rtilbe�{-
e x i pea vim fi
N Carolina ti r K tJ ,LLB
DE1�/�RTMILINT O%rTHE'" rr �,
SECRETARY of STAT-&" �
PO Box 29622 Raleigh, INC 27626-0622 [phone]
Date: 2/13/2006
Click here to:
� Vieyw Document Filings I
JPrint apre-populated Annual Report Form I Annual Report Count I Fil
an Annual Report I
Corporation Names
Name
Name Type
NC River Ventures, LLC Legal
Limited Liability Company Information
SOSID:
FID:
Status:
Date Formed:
Citizenship:
State of Inc.:
Duration:
Registered Agent
t, _07--17893
Agent Name:
Registered Office Address:
Registered Mailing
Address:
Principal Office Address:
Principal Mailing Address
Current -Active
3/24/2004
Domestic
NC
Perpetual
Law Office Jack B. Styles, P.C.
211 E Six Forks Road
Suite 204
Raleigh NC 27609
211 E Six Forks Road
Suite 204
Raleigh NC 27609
No Address
No Address
For questions or comments about the North Carolina Secretary of State's web site, please send e-mail to Webmaster.
http://www. secretary. state. nc.us/Corporations/Corp.aspx?Pitemld=6448735
2/13/2006

SOSID: 717893
Date Filed: 3/24/2004 2:44:00 PM
Elaine F. Marshall
North Carolina Secretary of State
C200408400037
State of North Carolina
Department of the Secretary of State
Limited Liability Company
Articles of Organization
Pursuant to § 57C-2-20 of the General Statutes of North Carolina, the undersigned does
hereby submit these Articles of Organization for the purpose of forming a limited liability
company.
The name of the limited liability company is:
River Ventures, LLC
2. The latest date on which the limited liability company is to dissolve is:
Perpetual
3. The name and address of each organizer executing these articles of organization is
as follows:
Jack B. Styles
211 E. Six Forks Road, Suite 204
Raleigh, NC 27609
4. The street address and county of the initial registered office of the limited liability
company is:
Number and Street: 211 Six Forks Road, Suite 204
City, State, Zip Code: Raleigh, NC 27609
County: Wake
The mailing address if different from the street address of the initial registered
office of the limited liability company is:
6. The name of the initial registered agent is:
Jack B. Styles

Check one of the following:
(i) Member -managed LLC: all of the members by virtue of their
status as members shall be managers of this limited liability
company.
X (ii) Manager -managed LLC: except as provided by N.C.G.S. § 57C-3-
20 (a), the members of this limited liability company shall not be
managers by virtue of their status as members.
8. The organizer shall perform the ministerial duty of executing and filing these
articles of organization. If members are named in these articles of organization,
the organizer shall not have any further duty or responsibility regarding the
limited liability company by virtue of acting as organizer.
The name and address of every initial member named in the Articles of
Organization is:
10. Any other provisions which the limited liability company elects to include are
attached.
11. 'these articles will be effective upon filing, unless a date and/or time is specified:
Signed on Tuesday, March 23, 2004.
I�
Sig tature
Jack B. Styles, Organizer
Type or Print Name and Title

I Oa. Limitation of Liability. No Manager or Member of the Company shall be liable
to the Company or its Members for monetary damages for an act or omission in
such person's capacity as a Manager or Member, except as provided in Chapter
57C of the General Statutes of North Carolina for (i) acts or omissions which a
Manager knew at the time of the acts or omissions were clearly in conflict with
the interests of the Company, (ii) any transaction from which a Manager derived
an improper personal benefit, or (iii) acts or omissions occurring prior to the date
this provision becomes effective. If Chapter 57C of the General Statutes of North
Carolina is amended to authorize action further eliminating or limiting liability of
a Manager or Member, then the liability of any Manager or Member of the
Company shall be eliminated or limited to the fullest extent permitted by Chapter
57C of the General Statutes of North Carolina as so amended. Any repeal or
modification of this section shall not adversely affect the right or protection of a
Manager or Member existing at the time of such repeal or modification.
I Ob. Indemnification. The Company shall indemnify the Managers and Members to
the fullest extent permitted or required by Chapter 57C of the General Statutes of
North Carolina, as amended from time to time, and the Company may advance
expenses incurred by the Manager or Member upon the approval of the Managers
and the receipt by the Company of an undertaking by such Manager or Member to
reimburse the Company unless it shall ultimately be determined that such
Manager or Member is entitled to be indemnified by the Company against such
expenses. The Company may also indemnify its employees and other
representatives or agents up to the fullest extent permitted under Chapter 57C of
the General Statutes of North Carolina or other applicable law, provided that the
indemnification in each such situation is first approved by Members owning a
majority in interest.
1 Oc. Operating Agreement. The Company shall be operated pursuant to a written
operating agreement. No purported oral operating agreement among the members
shall be enforceable. In the event that the members do not sign a written
operating agreement, the Company shall be operated in accordance with the
applicable provisions of N.C.G.S. Chapter 57C, and the applicable provisions of
that Chapter shall be deemed to be the operating agreement of the Company. In
the event that the members sign a written operating agreement which fails to
address any matter, that matter shall be governed by the applicable provisions of
N.C.G.S. Chapter 57C.

C R I S E R
TROUTMAN
T A N N E R
TRANSMITTAL LETTER
TO:
FROM:
PAUL BARTLETT
Mark T. Arcuri, PE
COMPANY:'
DATE:
NCDENR - SW
Feb 1, 20M
ADDRESS:
127 Cardinal Drive
CTT'S PROJECT NUMBER:
5603
SW
42-7 An 6
1°l
Wilmington, NC
PHONE NUMBER:
CLIENT'S REFERENCE NUMBER:
796-7215
RE:
PPD Parking Garage
IN
le)
WETRANSMIT: ❑ATTACHED ❑ UNDER SEPARATE COVER ❑HAND CARRIED BY -__ ❑UPS/FEDEX
THE FOLLOWING: ❑ TRACINGS ❑ PRINTS ❑ INSPECTION REPORT ❑ SHOP DRAWINGS ❑ SPECIFICATIONS ❑ OTHER
COPIES
DATE
SHEET NO.
DESCRIPTION
REMARKS
1ORIG &
APP
E
1COPY
gfCFl,
1 ORIG
INFILTRATION SUPPLEMENT FEB () 1
OOE
1 ORIG
CHECK NO 01848199 - $4000-
1 COPY
2-1-06
NARRATIVE AND STORMWATER CALCULATIONS
2 COPIES
2-1-06
Cl.l C1.2 C1.3
CONSTRUCTION PLANS
C2.1 C2.2 C2.3
c
1 COPY
3-15-05
INFILTRATION TEST REPORT
151
�V'
fjo /j&e;4 1 6,01 " e t r (a�-3
NOTES/COMMENTS:
Paul,
Your upfront help on this project is greatly appreciatedl As we discussed, PPD now owns property and will
build the parking garage. You permitted the deck previousy as SW8 050427, May 23, 2006, for The City
of Wilmington. We are proposing a larger infiltration system to meet City requirements. On behalf of River
Ventures, LLC, we hereby request the Permit holder name be changed as per the attached application.
Please call me with any questions you have (397-2929).
Cc: Tara Schwenzfeier (fx 254-0228)
CRISER TROUTMAN TANNER CONSULTING ENGINEERS
Post Office Box 3727 Wilmington, NC 28406 1 3809 Peachtree Ave. Suite 102 Wilmington, NC 28403 p 910.397.2929 f 910.397.2971

J
STORMWATER NARRATIVE
AND DRAINAGE CALCULATIONS
Project:
PPD PARKING GARAGE
Location:
155 Brunswick Street
Wilmington, North Carolina
New Hanover County
Prepared for:
River Ventures, LLC
3151 South 17th Street
Wilmington, NC 28412
POP
J G '\
Prepared by:
Mark T. Arcuri, PE
Criser Troutman Tanner Consulting Engineers
3809 Peachtree Avenue
Suite 102
Wilmington, NC 28403
Date:
February 1, 2006
CTT Project 5603.00
J 2co G

t
TABLE OF CONTENTS
Narrative...................................................................:..................................... 1
Storm Drain Layout Inside Deck................................................................... 2
DrainageAreas......................................................................................... 3-4
WierHGL Calculations................................................................................... 5
10 Year Storm Drain Calculations ............................. ....................... --- 6 - 8
50 Year Storm Drain Calculations....................................................... 9 - 11
Storm Drain Layout Outside Deck..............................................................12
10 Year Storm Drain Calculations......................................................13 -14
50 Year Storm Drain Calculations......................................................15 -16
Infiltration System Sizing for NCDENR.......................................................17
Infiltration System Sizing for City ........................................................ 18 - 22
Stormchamber Product Specifics....................................................... 23 - 28
Erosion Control Calculations............................................................... 29 - 31

f
STORMWATER NARRATIVE
GENERAL
PPD wishes to construct a parking garage as part of the Northern Downtown Revitalization
Effort. The existing property is 1.579 acres. Additional acreage (0.141 acres) was added to
the property at the northeast corner of the site (intersection of Second and Front Streets,
resulting in a new project property area of 1.720 acres (74907 square feet).
EXISTING SITE FEATURES
The site is currently a parking lot, all paved, and currently used by Cape Fear Community
College. Storm drainage in the Public Road Rights of Way exists on Front Street and
Brunswick, which flow west towards The Cape Fear River. Also, storm drainage exists on
Second Street and ties into drainage in Front Street and flows to the north and onto The
Cape Fear River as well. Topography across the site is down from east to west.
This site has an existing NCDENR Stormwater Permit for North Riverfront Parking Garage,
SW8 050427, dated May 23, 2005. A March 15, 2005 report by S&ME revealed an
infiltration rate of 9.1 inches per hour. Linda Lewis stated in email April 12, 2005 to treat
2 inches in lieu of a vegetative filter.
PROPOSEDIMPROVEMENTS
The parking garage will be six stories. The garage will result in 65,679 SF of impervious
surface on the property. Remaining areas between the garage building and the property line
will contain a combination of landscaping, hardscape, and sidewalks. Roof drains from the
top deck will be routed down along columns and sheer walls to below the bottom floor
elevation. From there, they will be collected in a storm drain system under the first floor
pavement and routed to a flow separation structure, below ground. This structure will direct
the first flush to an underground infiltration system. The separation structure will cause the
runoff in excess of the first flush to bypass the infiltration system and flow to the
aforementioned storm drains in the Front Street Right of Way. The infiltration system will be
at least 2 feet above the seasonal high water table. The system will utilize plastic arched
domes for the core of the infiltration system. The arches will be encased in #57 stone. The
entire system will then be wrapped in filter fabric. The system will be sized to satisfy both
City Pre Development flow requirements and State Water Quality requirements.
As required by The City of Wilmington, storm drains will be sized to convey the 10-year storm
flow and prevent flooding during the 50-year storm flow.

Hydraflow Plan View
Outfall
DI5/ST1
Project file: 5360 PPD Garage 2 FT Lower.stm No. Lines: 11 01-31-2006 J
HydrOm Storm Sewers 2003

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Storm Sewer Tabulation
Page 1 -
Station
Len
Drng Area
Rnoff
Area x C
Tc
Rain
Total
Cap
Vol
Pipe
Invert Elev
HGL Elev
Grnd / Rim Elev
Line ID
coeff
(1)
flow
full
Line
To
Incr
Total
In cr
Total
Inlet
Syst
Size
Slope
Up
Dn
Up
Dn
Up
Dn
Line
(ft)
(ac)
(ac)
(C)
(min)
(min)
(in/hr)
(cfs)
(cfs)
(ft/s)
(in)
M
(tt)
(ft)
(ft)
(ft)
(ft)
(ft)
1
End
13.0
000
1.51
0.00
0.00
1.43
0.0
12.8
5.9
8.46
0.00
0.17
96
000
19.00
1900
27.08
27.08
28.50
000
2
1
130
0.00
1.51
0.00
0.00
1.43
0.0
12.7
5.9
847
5.04
4.79
18
0.23
25.53
25.50
27.16
27.08
28.30
28 50
3
2
15.0
0.02
0.61
0.95
0.02
0.58
100
126
5.9
3.43
5.42
1.94
18
027
25.57
25.53
27.54
2752
28.00
28.30
4
2
89.0
0.00
0.90
0.00
000
0.86
0.0
'11.7
6 1
5.17
5 34
2.93
18
026
25.76
25.53
27.74
27.52
29.50
28.30
5
4
15.0
0.32
032
095
0.30
0.30
10.0
10.0
6.3
1 92
2.25
2.44
12
0.40
2632
26.26
27.98
27.94
29.75
29.50
6
3
5.0
0.24
0.24
095
0.23
0.23
10.0
10.0
6.3
1.44
2.25
1.83
12
0.40
26.09
26.07
27.63
27.63
28 00
28.00
7
3
100.0
0.01
0.35
0.95
0.01
0.33
10.0
11.6
6.1
2.02
3.29
1 64
15
0.26
2608
25.82
2772
27.63
29.65
28.00
8
7
22.0
020
0.20
0.95
0.19
0.19
10.0
10.0
6.3
1.20
2.28
1.53
12
0.41
26.42
26.33
27.81
27.79
29.75
29.65
9
7
103.0
0.14
0 14
0.95
0.13
0.13
10.0
10.0
6 3
0.84
2.02
1.07
12
0 32
26.66
26.33
27.84
27.79
2975
29.65
10
4
174.0
0.02
0.58
0.95
0.02
055
10.0
10.2
6.3
3.46
7.92
2.01
18
0.57
26.75
2576
28.11
27.94
29.50
29.50
11
10
50.0
0.56
0.56
095
0.53
053
10.0
100
6.3
3.35
2.36
4.30
12
0.44
27.47
2725
28.63
28.21
29.75
29.50
Project File. 5360 PPD Garage 2 FT Lower.stm
Number of lines: 11
Run Date: 01-31-2006
NOTES Intensity = 123.91 / (Inlet time + 23.70) A 0.85; Return period = 10 Yrs.
Mydrenow Storrs Sewers 2W3

Storm Sewer Profile
Proj. file: 5360 PPD Garage 2 FT Lower.stm -
Elev. (ft)
40.00
35.00
_ Ln_ Ln:-
- —Ln: 2—Ln: 3— 15 (i) — - — 12-( n)---
30.00
25.00
20.00
15.00
0 25 50 75 100 125 150 175 200 225 250
Reach (ft)
Hydraflow Storm Sewers 2003

Storm Sewer Profile
D.nl FI-- 94gn DDM (]n.nn- 0 CT 1 --, c4m
Elev. (ft)
35.00
30.00
25.00
20.00
15.00 -L
0
iG
L0 0V !0 IVV ILO IVV IIV GVV GGV GVv GiV VVv .'ca vv�a
Reach (ft)
0
Hydraflow Storm Sewers 2003

Storm Sewer Tabulation
Page 1-
Station
Len
Drng Area
Rnoff
Area x C
Tc
Rain
Total
Cap
Val
Pipe
Invert Elev
HGL Elev
Grnd I Rim Elev
Line ID
coeff
(1)
Flow
full
Llne
To
Incr
Total
Incr
Total
Inlet
Syst
Slope
Up
Dn
Up
Dn
Up
Dn
Line
7Jn)e
(ft)
(ac)
(ac)
(C)
(min)
(min)
(inlhr)
(cfs)
(cfs)
(ft/s)
(%)
(ft)
(ft)
(ft)
(ft)
(ft)
A
1
End
13.0
0.00
1 51
0.00
0.00
1 43
0.0
12.2
7.5
10.72
000
0.21
96
0.00
19.00
19.00
27.18
27.18
28.50
0.00
2
1
130
0.00
1 51
0.00
0.00
1 43
0.0
12.2
7.5
10.73
5.04
6.07
18
0.23
25.53
25.50
27.32
27.18
28.30
28.50
3
2
15.0
0.02
0.61
0.95
0.02
0.58
10.0
12.1
7.5
4.34
5.42
2.46
18
0.27
25.57
25 53
27.91
27.89
2800
28 30
4
2
890
0.00
0.90
0.00
0.00
0.86
0.0
A 1 3
7 6
6.51
5.34
3.68
18
0.26
25.76
25.53
28.23
2789
29.50
28.30
5
4
15.0
0.32
0.32
0.95
0.30
0.30
10.0
10.0
7 8
239
2.25
3.04
12
0.40
26.32
26.26
28.62
28.55
29 75
29.50
6
3
5 0
0.24
024
0.95
0.23
0.23
10.0
100
7.8
1.79
2.25
2.28
12
0.40
26.09
26.07
28.07
28.06
28.00
2800
7
3
100.0
0.01
0.35
0 95
0.01
0.33
10.0
11.3
7 6
2.53
3.29
2 07
15
0.26
2608
25.82
28.21
2806
29.65
2800
8
7
22.0
0.20
020
0.95
0.19
0.19
10.0
10.0
7.8
1.49
2.28
1.90
12
0.41
26.42
26.33
28.35
28.31
29.75
29.65
9
7
103.0
0.14
0.14
0.95
0.13
013
10.0
10.0
7.8
1.04
2 02
1.33
12
032
26.66
26.33
28.40
28.31
2975
29.65
10
4
1740
0.02
0.58
0.95
0.02
0 55
10.0
10.2
7.8
4.31
7.92
2.44
18
0.57
26.75
25.76
28.84
28.55
29.50
29 50
11
10
50.0
0.56
0.56
0 95
0.53
0.53
100
10.0
7.8
4.18
2.36
5.32
12
0.44
2747
27.25
29.67
28.98
29.75
29.50
Project File: 5360 PPD Garage 2 FT Lower.stm
Number of lines: 11
- Run Date: 01-31-2006
NOTES: Intensity = 176.65 / (Inlet time + 27.60) ^ 0.86; Return period = 50 Yrs.
Hydr Om Stonn Sewers 2003

Storm Sewer Profile
Proj. file: 5360 PPD Garage 2 FT Lower.stm -
Elev. (ft)
40.00
—L-n 1
—96-(in)— —
35.00
Ln,__ _ k--I
_Ln: 2_L-n: 3— 15 (i n)
30.00
25.00
20.00
1500
0 25 50 75 100 125 150 175 200 225 250
Reach (ft)
O
HydraFlow Storm Sewers 2003

Storm Sewer Profile
Proj. file: 5360 PPD Garage 2 FT Lower.stm
Elev. (ft)
40.00
35.00
30.00
25.00
rra ie
15.00 1
0
1
25 50 75 100 125 150 175 200 225 250 275 300 325 350
Reach (ft)
Hydraflow Storm Sewers 2003

Hydraflow Plan View
Outfall
Project file: 5603 PPD Garage Street Drainage Rev.stm No. Lines: 4 _� 02_01-2006 J
MydrO. Storm Sewers 2003
N

Storm Sewer Tabulation
Page f -
Station
Len
Drng Area
Rnoff
Area a C
Tc
Rain
Total
Cap
Val
Pipe
Invert Elev
HGL Elev
Grind I Rim Elev
Line ID
(I)
Flow
full
Line
To
Incr
Total
coeff
Incr
Total
Inlet
Syst
Size
Slope
Up
_
Dn
Up
Dn
Up
Dn
Line
(ft)
(ac)
(ac)
(C)
(min)
(min)
(Inlhr)
(cfs)
(cfs)
(ftls)
(In)
(%)
(ft)
(ft)
(ft)
(ft)
(ft)
(ft)
1
End
40.0
0.01
1.52
0.95
0.01
1.44
&0
13.3
5.8
8.42
11.86
5.69
18
1.28
17.35
16.84
1846
18.09
19.80
21.35
2
1
180
0.00
1.51
0.00
0.00
1 43
0.0
13.2
.58
8.37
8.87
6.82
15
1.89
1794
17.60
19.61
19.30
22.50
19.80
3
2
38.0
000
1.51
0.00
0.00
1.43
00
13.1
5.9
8.39
17.08
7.00
15
7.00
20.60
17.94
21.73
20.33
29.00
22.50
4
3
500
1.51
1.51
0.95
1.43
1.43
13.0
'13 0
5.9
8.42
19.16
7.02
15
8.80
2500
20.60
26.13
21 85
28.50
29.00
Project File: 5603 PPD Garage Street Drainage Rev.stm
Number of lines: 4
Run Date: 02-01-2006
NOTES: Intensity = 121.801 (Inlet time + 23.50) A 0.84: Return period = 10 Yrs.
Hyara0ow Sion Sewers 2W3 J

Storm Sewer Profile
Proi. file: 5603 PPD Garaae Street Drainaae Rev.Stm _
Elev. (ft)
"Cr. me
33.00
23.00
13.00 '
0
10 20 30 40 50 60 70 80 90 100 110 120 130 140 150
Reach (ft)
HydraFlow Storm Sewers 2003

Storm Sewer Tabulation
Page 1 -
Station
Len
Drng Area
Rnoff
Area x C
Tc
Rain
Total
Cap
Val
Pipe
Invert Elev
HGL Elev
Grind I Rim Elev
Line ID
coeff
(I)
flow
full
Line
To
Incr
Total
Incr
Total
Inlet
Syst
Size
Up
Dn
Up
Dn
Up
Dn
Line
[Slope
(ac)
(C)
(min)
(min)
(inlhr)
(cfs)
(cfs)
(ftls)
(in)
(k)
(ft)
(ft)
(ft)
(k)
(k)
1
End
40.0
0.01
1.52
0.95
0.01
144
5.0
13.2
7.3
10.56
11.86
6.73
18
1.28
17.35
16.84
18.59
18.09
19.80
21.35
2
1
18.0
000
1.51
000
0.00
1.43
0 0
13.2
7.3
10.49
8.87
855
15
1.89
17.94
17.60
20.13
19.65
22.50
1980
3
2
38.0
0.00
1 51
0.00
000
1.43
0.0
13.1
7.3
10.51
17.08
8.57
15
7.00
20.60 -
17.94
22.28
21.27
29.00
22.50
4
3
50.0
1.51
1.51
0.95
1.43
1.43
13.0
13.0
7.3
10.53
19.16
8.65
15
8.80
25.00
20.60
26.20
22.45
28.50
29.00
Project File: 5603 PPD Garage Street Drainage Rev.stm
Number of lines 4
Run Date: 02-01-2006
NOTES: Intensity = 171.29 1(Inlet time + 27.30) " 0.85; Return period = 50 Yrs.
Hydrsnow storm sewers 2003

Storm Sewer Profile
Prol. file: 5603 PPD Garage Street Drainage Rev.strn
Elev. (ft)
38.00
33.00
W. ie
23.00
18.00
13.00 '
0
10 20 30 40 50 60 70 80 90 100 110 120 130 140 150
Reach (ft)
Hydraflow Storm Sewers 2003

DATE DESIGN CRISER & TROUTINIAN SHEET
Consulting Engineers North Carolina j Wilmington, e o OF
CHECK JOB F;; T FOR JOB. NO.
Qe z,c , �Gv1 c—A4zat-E. �� �-t cp
�s �.: I a �� `.`IrzJ�r—c � oF.1 S�(ST.:.M %G� �wF►.1t2. yu)
T
2 g'5 M l ry I M,u,wt
MBE

PPD Garage
February 1, 2006
Criser Troutman Tanner
Mark T. Arcuri, PE
Pre -Development
Runoff Coefficient, C
Hydraulic Length, L
Elevation Change, H
Watershed Area, A
Time of Concentration, Tc
10-yr Intensity, I
50-yr Intensity, I
10-yr Flow, Qa
50-yr Flow, Oa
Post -Development
Impervious Area
Runoff Coefficient, C
Hydraulic Length, L
Elevation Change, H
Area, A
Time of Concentration, Tc
10-yr Intensity,
50-yr Intensity, I
10-yr Flow, Qp
50-yr Flow, Qp
dQ, 10 yr storm
dQ, 50 yr storm
10 yr Required Storage
50 yr Required Storage
Time to Peak
10-yr Storm Depth (P)
50-yr storm depth (P)
Soil Curve Number (CN)
SCS Curve Number (CN)
Soil Storage Capacity (S)
10-yr Runoff Depth (Q')
10-yr Runoff Volume (V)
50-yr Runoff Depth (Q`)
50-yr Runoff Volume (V)
0.2
320 ft
15ft
1
acres
5.00 min
7.20 in/hr
8.89 in/hr
ifs 2.19 cfs
2.71 cfs
1.51 acres
0.95
320 ft
15ft
1.51 acres
5.00 min
7.20 in/hr
8.89 in/hr
10.41 cfs
12.87 cfs
8.22 cfs
10.16 cfs
3.43E+03 cu ft
4.24E+03 cu ft
4.80 in
6.40 in
49 �00
98
0.20
4.56 in
25014 cu ft
6.16 in
33773 cu ft
Tc = (L'/H)""/128
I = 252/(30+Tc)
I = 338/(33+Tc)
Q=CIA
Q = CIA
To = (L'/H)""/128
I = 252/(30+Tc)
I = 338/(33+Tc)
Q = CIA
Q = CIA
S = dQ'Tc'1.39'60
S = dQ`Tc'1.39'60
6 hr runoff
6 hr runoff
S = 1000/CN - 10
Q' = ((P-0.2'S)1^2/(P + 0.8'S)
V=Q'A
Q' = ((P-0.2'S)112/(P + 0.8'S)
V = Q'A
10-yr Time to Peak (Tp) 28.80 min Tp = V/1.39Qp
50-yr Time to Peak (Tp) 31.47 min Tp = V/1.39Qp

)01
Infiltration Trench
storage pipe (D)
68
in
basin depth (H)
4.33
ft
basin width at bottom (W)
11.4
ft
Trench Length at bottom (L)
615
ft
Void Fraction (Fv)
0.4
Infiltration Rate (It)
9.1
in/hr
Pipe Volume (Vp)
7755 cu ft
Stone Fill Volume (Vs)
9041 cu ft
Total Volume (Vt)
16796 cu ft
Effective Area (Ae)
3879 sq ft
Trench Outflow (Ot)
1.477 cfs
Stage Storage Function
Trench Invert 22.00 ft
Trench Bank 26.33 It
adjust length and width to represent true infiltration area
1 if open basin, .4 if stone filled
Vp = Pi*(D/2)^2*U144 divide by 2 for StormChamber
Vs = Fv*[H*W*L - Vp]
Vt = Vp + Vs
Aeff = VUH
Ot = It*L*W/43,200
CONTOUR [NCR ACCUM
CONTOUR AREA VOL VOL STAGE In S In Z Zest
[sq ft] [cu ft] [cu ft] [ft]
22.00 3879
23.00 3879
24.00 3879
25.00 3879
26.00 3879
26.33 3879
62.281616
b _ 1.00
Ks I 3.88E+03
10 yr
50 yr
0
0
0.00
0.0000
0.0000
0.0003
3,879
3,879
1.00
8.2633
0.0000
1,0000
3,879
7,758
2.00
8.9565
0.6931
2.0001
3,879
11,637
3.00
9.3619
1.0986
3.0001
3,879
15,516
4.00
9.6496
1.3863
4.0001
1,280
16,796
4.33
9.7289
1.4656
4.3301
b = [In (S2/S,)]/[In (Z2/Zl)]
Ky - Sy/2z
D
Peak Discharge (ft3ls)
Pre -Development
City Consultant
2.19
2.71
Post -Development
City Consultant
10.41
12.87

2O
Regression to determine b and Ks
9.6000
9.4000 -
j—
= 8.8000 - -Y__ x +_82633
8.6000 - -- ---R2�=
8.4000-----
8.2000 -
0.000 0.200 0.400 0.600 0.800 1.000 1.200
0 0 0 0 0 0 0
In Z
m= 1
b = 8.2633 3878-873

Inflow Hyarograph, 10-yr storm
t<1.25 Tc 0Ot= Op/2'(1<os(p,'I?p))
t - 1.25 Tc 0 = 4 34'Op-axp(-1.3'(l7Tp))
Permanent Level
2200 ft
Top
Length
0 00 ft
Ctrl. Pipe
Diameter 00-0 in
Peak Outflow
1.84 Cs
Elevation
it
Elevation 1
0.00 it
Peak Stage
26.43,ft
Weir Coal.
3.00
Onf. Coal.
0.52
Om Coal.
060
0 Pre -Development
2.19
Trench Bank
2633
WOO
Length
d,00 R
Barrel
Onf. Coef
0.65
Infiltration Rate:
1 48 cfs
Top El
Bat. El. i
27.33 ft
26_33 ft
Diameter 1500 in
Elevation 25_00 ft
Ofi-site Outflow
0.36,
Weir Coal
om teat
300
0.60
c-T
e��L
Interval -
0.100 fraction of tp
Tp=
28.80
Weir
Weir
Weir
Top
Top
Top Structure
Total
Trench
Time t
Oln
Storage
Stage
Ctrl pipe
Weir
Oriface Outflow
Weir Ortface
Outflow
Total
Barrel
Outflow
Infiltration
min
cis
cu It
it
cis
cis
cis
cis
cis
cia
cis
cfs
eta
cis
Cis
0
0.00
0.00
22.00
0.00
0.00
0.00
0.00
0.00
0.00
000
0,00
0.00
000
0.00
3
0.25
000
22.00
000
0.00
0.00
000
0.00
000
GOO
000
ODD
000
0.00
6
099
44.04
2201
000
0.00
000
ODO
000
0.00
000
0.00
ODD
000
000
9
215
215.88
22.06
000
0.00
0.00
0.00
0.00
0.00
000
000
000
000
0.00
12
360
586.79
22 15
000
0.00
ODO
0.00
0.00
0.00
000
000
coo
148
148
14
521
95333
22.25
000
000
000
000
000
000
0.00
000
0.00
1.48
148
17
682
159792
22.41
000
0.00
000
0.00
000
000
000
000
0.00
148
148
20
827
2520.56
2265
000
000
000
0.00
ODO
0.00
000
0,00
0,00
1.48
1.48
23
942
3694.03
22.95
0.00
0.00
0.00
ODO
0.00
000
0.00
000
0 DO
1.48
148
26
10.16
506656
23.31
0.00
000
000
000
000
000
000
000
000
1.48
148
29
10.41
656689
23.69
0.00
0DO
000
000
000
000
000
000
000
1.48
1.48
32
1016
811126
2409
ODO
000
000
000
000
ODD
000
000
000
148
1.40
35
9.42
9611.58
24.48
0.00
0.00
0.00
000
0.00
000
0.00
000
GOO .
148
1.48
37
8.34
1098410
24.83
0.00
000
000
000
000
000
000
000
000
1.48
1.48
40
732
1217003
2514
000
000
000
0.00
000
0.00
000
000
0.18
148
148
43
643
13180.27
25.40
0.00
0.00
0.00
0.00
000
ODD
ODD
coo
091
1.48
1.48
46
565
14036.25
25.62
0.00
0.00
0.00
000
000
000
GOO
000
176
148
1.48
49
496
14756.T7
25.80
0.00
0.00
0.00
0.00
000
000
000
0.00
2.62
148
1.48
52
4.35
1535835
25.96
000
O.00
0.00
0.00
000
000
000
000
3,41
148
148
55
382
15855.49
26.09
0.00
0.00
0.00
0.00
000
000
000
0.00
4.11
1.48
1.48
58
336
16260.91
26.19
0.00
0.00
0.00
0.00
ODO
0.00
0.00
0.00
472
148
1.48
60
2.95
16585.81
2628
000
OM
000
000
0.00
0.00
000
0.00
5.16
148
1.48
63
2.59
16839.98
2534
0.00
0.01
002
0.01
000
000
0.00
0.01
5.41
149
148
66
227
1702962
2639
000
018
020
018
ODO
000
0.00
0.18
559
165
1.48
69
200
1713635
2642
OW
031
035
031
000
000
000
0.31
569
1.79
1.48
72
1.75
17172.02
2643
000
036
041
0.36
000
0.00
0.00
036
572
1 84
1.48
75
1.54
1715696
26.42
0.00
0.34
0.39
0.34
0.00
0.00
ODD
034
5.71
182
1.48
78
135
17108.70
2641
0.00
028
031
028
000
000
0.00
028
567
1 75
1.48
81
1.19
1703944
26.39
000
0.19
0,21
0.19
0.00
000
0.00
019
560
1.67
1.48
84
1.04
1696658
26.37
0.00
0.10
0.12
010
0.00
0.00
0.00
010
552
1.58
1.48
86
091
160088
26.35
0.00
003
003
0.03
000
0.00
000
0.03
5.43
150
148
89
0.90
1676193
26.32
0.00
0.00
0.00
0.00
0.00
0.00
0.00
000
5.33
148
1.48
92
0.71
1664556
26.29
0.00
000
000
GOD
0.00
0.00
0.00
000
522
1.48
148
95
0.62
16512.26
26.26
0.00
0.00
0.00
000
0.00
0.00
0.00
000
5.08
148
1 d8
98
054
16364.11
26.22
000
000
0.00
0.00
0.00
0.00
0.00
0.00
488
1.48
148
101
048
16202.90
2618
000
ODO
000
0.00
000
0.00
0.00
0.00
463
1.48
148
104
042
16030.24
2613
000
0.00
000
0.00
000
000
000
0.00
437
148
148
107
0.37
15847.52
26.09
0.00
0.00
000
0.00
0.00
0.00
000
0.00
4.10
1.48
1.48
109
0.32
1565596
2604
GOD
000
000
000
000
0.DO .
000
000
3 B3
1.48
1.48
112
0 2B
1546665
25.98
0.00
0.00
000
0.00
000
0.00
OD0
000
3.54
1.48
1.48
115
0.25
15250.53
25.93
0.00
0.00
0.00
0.00
0.00
000
0.00
000
3.26
1 48
1.48
118
022
1503842
25.88
0.00
000
000
000
000
000
000
0.00
2.98
1.48
1.48
121
0AS
1482106
25.82
0.00
000
000
000
000
coo
0.00
000
270
1.48
148
124
0.17
1459909
25.76
000
000
000
000
000
000
000
000
242
1.48
1.48
127
015
1437307
25.71
0.00
0.00
000
000
0.00
ODD
0.00
000
215
148
1.48
130
0.13
14143.49
25.65
0.00
000
000
000
000
000
000
000
188
1.48
1.48
132
0.11
1391079
25.59
0.00
000
0.00
000
000
000
0.00
000
163
1.48
1.48
135
0.10
1367535
25.53
0.00
0.00
0.00
000
0.00
0.00
0.00
000
1.38
148
148
138
009
1343750
25.46
0.00
0.00
O.DO
GOD
0.00
000
0.00
000
1 15
1.48
148
141
008
13197.54
25.40
0.00
0.00
O.DO
0.00
000
000
000
000
0.93
1.48
1.48
144
007
12955.72
2534
0.00
O.OD
0.00
0.00
000
000
000
0.00
0.72
148
1.48
147
0.06
12712.27
2528
000
0.00
0.00
0.00
000
0.00
000
O.DO
0.53
1.48
1.48
150
0.05
12467.39
2521
000
0.00
0.00
000
0.00
0.00
0.00
000
036
1.48
1.48
153
005
12221.25
25.15
0.00
0.00
000
0.00
0.00
000
000
000
021
148
1.48
156
004
11974ol
2509
000
000
000
000
000
000
000
0.00
0.09
1.48
1.48
158
0.04
11725.80
25.02
0.00
0.00
000
ODO
O.00
ODO
000
0.00
0.01
1.48
1.48
161
0.03
it476.73
24.96
0.00
000
000
000
0.00
000
0.00
000
000
1.48
1,48

Z,Ix
Inflow Hydrograph, 50-yr storm
t < 1.25 Tc 0 (t) = Op/2'(i cos(pi't/Tp))
t> 1.26 Tc 0 = 4.34.Op•exp(-1.3'(VTp))
Permanent Level
22.00 it
Riser
Length
0.00 It
Ctrl. Pipe
Diameter
000
in
Peak Outflow
6.88�
CIS
�'�`
'r0fa44
Elevation
0.00 It
Elevation
0.00
It
Peak Stage
26.92,?K
ft
L.G'S743
Weir Coef.
3.00
Ord. Cost
052
..��- ��.
Orif. Coef.
0.60
O Pre -Development
2,71
_
Pond Bank
26.33
Sec Riser
Length
4.00 it
Barrel
Orif. Coef
0.65
Infiltration Rate:
1.48 cfs
Top El.
27.33 ft
Diameter
15.00
in
Off -site Outflow
5.40'
Bot. El.
26.33 ft
Elevation
2500
it
Weir Coef.
3.00
Orif. Coef.
0.60
'
Tp =
31.47
Riser 2
Riser 2
Riser 2
Riser
Riser'
Riser
Structure
Total
Trench
Time t
Oln
Storage
Stage
Ctrl pipe
Weir
Ortface
Outflow
Weir
Orgace
Outflow
Total
Barrel
Outflow
Infiltration
min
CIS
cu ft
ft
cfs
CIS
Cis
cfs
cis
cfs
CIS
Cfs
cfs
cfs
cfs
0.00
0.00
0.00
22.00
0.00
0.00
0.00
0.00
0.00
0.00
0.00
0.00
0.00
0.00
0.00
3.15
0.31
0.00
22.00
0.00
0.00
0.00
0.00
0.00
0.00
0.00
0.00
0.00
0.00
0.00
6.03
1.13
54.40
22.01
0.00
000
0.00
0.00
0.00
000
0.00
0.00
0.00
0.00
0.00
8.91
2.38
249.57
22.06
0.00
0.00
0.00
0.00
0.00
0.00
0.00
0.00
0.00
000
0.00
11.79
3.96
660.70
22.17
0.00
0.00
0.00
0.00
0.00
0.00
0.00
0.00
0.00
1.48
1.48
1467
5.75
1090.07
22.28
0.00
0.00
0.00
0.00
0.00
000
0.00
0.00
0.00
148
1.48
1755
759
1827.93
22.47
0.00
0.00
0.00
0.00
0.00
0.00
0.00
0.00
0.00
1.48
1.48
20.43
9.34
288C00
22.74
0.00
0.00
0.00
0.00
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000
0.00
0.00
0.00
1.48
1.48
23.31
10.84
4241.89
23.09
0.00
0.00
0.00
0.00
0.00
0.00
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0.00
0.00
1.48
1.48
26.19
11.99
5860.44
23.51
0.00
0.00
0.00
0.00
0.00
0.00
0.00
0.00
0.00
1.48
1.48
29.07
12.68
7677.12
23.98
0.00
0.00
0.00
0.00
0.00
0.00
0.00
0.00
0.00
1.48
1.48
31.95
12.86
9613.11
24.48
0.00
0.00
0.00
0.00
0.00
0.00
0.00
0.00
0.00
1.48
1.48
34.83
12.51
11579.83
24.99
0.00
0.00
0.00
0.00
0.00
0.00
0.00
0.00
0.00
1.48
1.48
37.71
11.66
13486.15
25.48
000
0.00
0.00
000
0.00
0.00
0.00
0.00
1 19
1.48
1.48
40.59
10.44
15245.92
2593
0.00
0.00
0.00
0.00
0.00
0.00
0.00
0.00
3.26
1.48
1.48
43.47
9.27
16795.56
26.33
0.00
0.00
0.00
0.00
0.00
0.00
0.00
0.00
5.37
1.48
1.48
46.35
8.23
18142.79
26.68
0.00
2.46
2.79
2.46
0.00
0.00
0.00
2.46
6.56
3.93
1,48
49.23
7.31
18885.86
26.87
0.00
4.75
5.39
4.75
0.00
0.00
0.00
4.75
7.13
6.22
1.48
52.11
6.49
19073.52
26.92
0.00
5.40
6.13
5.40
0.00
0.00
0.00
5.40
7.27
6.88
- 148
54.99
5.76
19006.62
26.90
0.00
5.16
5.86
5.16
0.00
0.00
0.00
5.16
7.22
6.64
1.48
57.87
5.12
18854.75
26.86
0.00
4.64
5.27
4.64
0.00
0.00
0.00
4.64
7.11
6.12
1.48
6075
4.54
18681.56
26.82
0.00
4.07
4.62
4.07
0.00
0.00
0.00
4.07
6.98
555
1.48
63.63
4.03
18508.25
26.77
0.00
3.52
4.00
3.52
0.00
0.00
0.00
3.52
6.84
5.00
1.48
66.51
3.58
18341.56
26.73
0.00
3.02
3.43
3.02
0.00
0.00
0.00
3.02
6.71
4.50
1.48
69.39
3.18
18183.33
26.69
0.00
2.57
291
2.57
0.00
0,00
0.00
2.57
6.59
4.D4
1.48
72.27
2.82
18033.73
26.65
0.00
2.16
2.46
2.16
0.00
0.00
0.00
2.16
6.47
3.64
1.48
75.15
2.51
17892.31
26.61
0.00
1.80
2.05
1.80
0.00
0.00
0.00
1.80
6.35
3.28
1.48
78.02
2.23
17758.39
26.58
0.00
1.48
1.68
1.48
0.00
0.00
0.00
1.48
6.24
2.96
1.48
80.90
1.98
17631.23
26.55
0.00
1.20
1.36
1.20
0.00
0.00
0.00
1.20
6.13
2.68
1.48
83.78
1.75
17510.03
26.51
0.00
0.95
108
0.95
0.00
0.00
000
0.95
603
2.43
1.48
86.66
1.56
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26.48
0.00
0.73
083
0.73
0.00
0.00
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0.73
592
2.20
1.48
89.54
1.38
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26.46
0.00
0.53
0.61
0.53
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0.00
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0.53
5.82
2.01
1.48
92.42
1.23
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26.43
0.00
0.37
0.41
0.37
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0.00
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0.37
5.73
1.84
1.48
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1.09
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0.00
0.22
0.25
0.22
0.00
0.00
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5.63
1.70
1.48
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W 'vw h v d r J IO g i 2 3 0 1 U t i 0-3..,0 •••

BENEFITS OVER OTHER TYPES OF BMPS
» Helps counter drought conditions by maintaining groundwater base flow to streams.
>> Replicates pre -development hydrology.
» Eliminates thermal discharge loadings.
>> Replenishes groundwater supplies.
>> Achieves higher pollutant removal rates through soil filtration and accelerated
microbial actions (bio-remediation).*
>> Achieves Low Impact Development and Zero Discharge goals.
>> Reduces dependence on stormwater ponds and associated maintenance costs,
liability and mosquito problems and allows for use of higher value real estate.
>> Provides a lower cost and longer effective life alternative to perforated pipe.
» Provides a lower cost alternative to drainage pipe for conveyance, with added
benefits of groundwater recharge and water quality enhancement. ,
AVERAGE % REMOVAL RATES
POLLUTANT
PARAMETER i
INFILTRATION
Wetland
Water
Quality Pond
Filtering
System
Water
Quality Swale
Total Phosphorus
........................................... >.................................
65 i....................................................................
51
45.5 i..................................
45
14.5
...................................
Total Nitrogen
............................................................................
82.5 i..................................
20.9
30
.......................................................,...........
32
10.5
i...................................
Lead
.............................................................................................................
98
63
66.5
`...................................................................
71
50
i........... .............. .........
Zinc
........................................_................................._................................._..............................
99
53.5
50.5
69
..........................
49
_ ............................
Suspended Solids
...........................................>
88.5
................................. _.................................
78
70
:..............................
81
..........................
66
............................
Organic Carbon
82
28
35
57
23
Sou e: Brown, Whitney, Schueler,
Thomas. National Pollutant
Remoyal Performance Database for
Storm —nor BMPs. August t991
Center Far Watershed Protection,
Ellicott
City, Maryland.
BENEFITS OVER SIMILAR
TECHNOLOGIES
>> Direct connect side openings eliminate expensive header pipe
manifold feed and discharge pipe systems and related extra
excavation and stone.
>> Over 6o% more storage capacity, with a design storage capacity
Of 115 cubic feet per StormChamber.
>> Less time and labor cost for installation.
>> Tested to exceed AASHTO H-20 wheel load rating by 3 times by
Rensselare Polytechnic Institute.
>> Integrated end walls; no extra cost for end plates.
Smaller system foot print and less stone and filter fabric required.
» io" inspection/clean out risers for quick and easy sediment
removal.
8.5'
-- "__ by dl r C to 0 1 c s0 lu ti on s. cc

RECOMMENDED INSTALLATION OF STORMCHAMBER
FOR STORM WATER MANAGEMENT UNDER PAVEMENT
StormChamber storage= 75CF
Design storage capacity= 115CF
I
34"
I
EXAMPLE CONFIGURATION
­Fq i­_,
W W V1 tl V Cl. 0 1 0 1,J I C 5 I I Ll t I 0 11 1 1 1) M

THE COMPANY
We are a multi -disciplinary environmental consulting and water resources research company,
founded and operated by ecologists, biologists and engineers.
The StormChamber was developed as a management toot for the control of stormwater runoff,
sediment control, and pollutant removal, designed to overcome the deficiencies of alternative
technologies.
WARRANTY
StormChambers are covered by a 10 year limited warranty. See our design manual for more details.
MI&t (11UT 14 1%,111:1
Free design manual and CD. The CD contains detail sheet drawing CAD files that can be
copied directly to plans, and an Excel program for calculating the numbers of
StormChambers needed, alternative chamber configurations, trench dimension, and the
amount of stone and filter fabric needed.
We provide free StormChamber system design assistance.
On -site installation assistance.
Lot I] LI I fiT* a I I 1111 1*3 kyj Fit t' DI
[phone] (Toll -Free)
[phone] (Voice)
[phone] (Fax)
info@hydrologicso(utions.com (Email Us)
PO Box 672, Occoquan, Virginia 22125
www nYdfoloqlc.qchjtions com

StormChamber Design Calculator
Cubic Feet of Storage Required: r._... ___ -_ 1 < Start Here
Modify Storage With
Number of Number
Number
Trench Min. Trench
Min. Trench
Square Ft.
CY of
CY of
Sq. Yards
Additional Stone'
Chambers Wide
Long
Depth (Ft) Width In Ft.
Length in Ft.
of System
Excavation
Stone
Filter Fabric
Storage Just In
StormChamber 75CF
107E
#DIV/O!
','.��
2
#DIV/01
#DIVIO!
#DIV/O!
#DIV/0!
#DIV/O!
With Stone Up To Top Of
StormChamber 110CF
73[ =- ]
#DIV/O!
( ---�
2
#DIV/01
#DIV/O!
#DIV/O!
#DIV/01
#DIVIO!
Standard With 6" Stone
Above & Below 115CF
70r —
#DIVI01
1`_' __�
2
#DIV101
#DIV/01
#DIV101
#DIV/01
#DIV/01
With Additional 6"
Stone 124CF
65[T---
111
5.933j
37
85
3,111
684
319
506
With Additional 12
Stone 133CF
61
#DIV/O!
r
2
#DIV/O!
#DIV/O!
#DIV/O!
#DIV/O!
#DIV/01
With Additional 18"
Stone 142CF
57�_�
#DIV/O!
r—j
2
#DIV/O!
#DIV/O!
#DIV/O!
#DIV/O!
#DIV/O!
With Additional 24"
Stone 151CF
53l V
#DIV/01
—�
2
#DIV/01
#DIV/O!
#DIV/O!
#DIV/01
#DIWO!
With Additional 30"
Stone 160CF
50=_ I!
#DIV/O!
[�
2
#DIV/01
#DIV/O!
\
#DIV/0!
#DIV/O!
#DIV/O!
With Additional 36"
Stone 169CF
48r'----_]
#DIV/O!
[„_ 1
IGNORE ERROR MESSAGES
2
#DIV/O!
#DIV/01
#DIV/O!
#DIVIO!
#DIV/O!
' Storage capacity of stone
based on 40% void.

StormChamber Design Calculator
Cubic Feet of Storage Required: L < Start Here
Modify Storage With
Number of Number Number Trench
Min. Trench
Min. Trench
Square Ft.
CY of
CY of
Sq. Yards
Additional Stone*
Chambers Wide Long Depth (Ft) Width in Ft.
Length in Ft.
of System
Excavation
Stone
Filter Fabric
Storage Justin
StormChamber 75CF
1331-_- #DIV/01 -- -�J
2
#DIV/01
#DIV/O!
#DIV/O!
#DIV/O!
#DIV/O!
With Stone Up To Top Of
StormChamber 110CF
90(,_� #DIV/O! j___- i
2
#DIV/O!
#DIV/O!
#DIV/O!
#DIV/O!
#DIV/O!
Standard With 6" Stone
Above & Below 115CF
_
87 #DIV/01 J
2
#DIV/01
#DIV/01
#DIV/01
#DIV/01
#DIV/01
With Additional 6"
Stone 124CF
_
80[ �__51 16� 5939
31
125
3,843
844
394
632
With Additional 12"
Stone 133CF
75[_--- #DIV/O! 5.8333
2
#DIV/O!
#DIV/O!
#DIV/O!
#DIV/01
#DIV/01
With Additional 18"
Stone 142CF
70[_ #DIV/O! �_ �
2
#DIV/O!
#DIV/O!
#DIV/O!
#DIV/01
#DIV/O!
With Additional 24"
Stone 151CF)
#DIV/O! _'
2
#DIV/O!
#DIV/O!
#DIV/O!
#DIV/O!
#DIV/O!
With Additional 30"
Stone 160CF
62(� #DIV/O! F
2
#DIV/O!
#DIV/O!
#DIV/O!
#DIV/O!
#DIV/O!
With Additional 36"
Stone 169CF
59[—_j #DIV/O! j
2
#DIV/O!
#DIV/O!
#DIV/O!
#DIV/O!
#DIV/O!
IGNORE ERROR MESSAGES
Storage capacity of stone
based on 40% void.

DgTE DESIGN SHEET
CRISER & TROUT�IAN
IW 'N�- Wilmington, ConsultinbEngineers North Carolina '1 1 nc
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Wilmington, Consulting Engineers North Carolina
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i
March 15, 2005
City of Wilmington
Post Office Box 1810
Wilmington, North Carolina 28402
Attention: Mr. Jim Flechmer
Reference: Double Ring Infiltrometer Testing
North Riverfront Parking Garage
Brunswick Street
Wilmington, North Carolina
Job No. 1061-05-085
Dear Mr. Flechtner:
FEB 0 1 200� �Z /1't li�
In accordance with S&ME Proposal 594-05 dated February 2, 2005, S&ME personnel have recently
conducted one double -ring infrltrometer test of the surficial soils at the subject site at the
approximate location shown in Figure 1. Specifically, our representatives visited the site on March
12, 2005, and conducted one double -ring infiltrometer test at a depth of 15 inches below the asphalt
surface. This testing was conducted in general accordance with American Society for Testing and
Materials (ASTM) procedure D-3385 entitled, "Infiltration Rate of Soils in Field Using Double -
Ring Infiltrometer".
While on site, our representative attempted to advance hand-augered borings near the infltrometer
test location. However, our personnel were not able to advance a boring beyond a maximum depth
of 18 inches at two locations due to the presence of rubble debris.
The average infiltration rate at the test location was approximately 9.1 inches per horn. A summary
of the field test results is presented in Table 1.
S&ME, Inc. )910) 799-9945
6409 Amsterdam Way, Building B-3 [phone] fox
Wilmington, North Carolina 28405 w .smeinc.ccm

City of Wilmington
S&ME Job Number 1063-05-085
March 15, 2005
Page Two
S&ME appreciates the opportunity to provide our services during this phase of the project. Should
you have any questions after reviewing this letter, or if we can be of additional assistance, please do
not hesitate to contact us at your convenience.
Sincerely,
S&ME, INC.
C. Richard Connell, II
Senior Engineering Technician
Michael W. Behen, P.E.
Senior Geotechnical Engineer
CRC:MWB/jns
Attachments
Copies: Criser & Troutman Consulting Engineers, Mr. David Criser (Fax)
HR Associates, Mr. John Farabow (E-Mail)

TABLE 1
Double Ring Infiltrometer Testing
North River&ont Parking Garage
Brunswick Street
Wilmington, North Carolina
Job No. 1061-05-085
Date of Test
Depth of Test Below Site Grade
Depth of Water in Rings
Inner Diameter of Inner Ring
Inner Diameter of Outer Ring
Average Infiltration Rate
March 12, 2005
15 inches below asphalt surface
3 inches
I 1 %a inches
22% inches
9.1 inches per hour

PROP0� PROPERTY AVJL15Tr1FHT
EXI5TIN6 PROPERTY LINE
If/
I 1
!
1
its
I \
I
/ I
/
I
/
LEGEND
• Approximate Location Note: Site plan drawing provided to S&ME
of Infiltrometer Testing by H.R. Associates personnel.
SCALE: NOT TO SCALE INFILTROMETER TESTING Figure
NORTH RNERFRONT PARKING GARAGE Numbel
CHECKED BY: MWBsm BRUNSWICK STREET
WILMINGTON, NORTH CAROLINA 1
DRAWN BY: JNS
ENGINEERING • TUrING
DATE: 3-14-05 ENVIRONMENTALSERVICES JOB NUMBER: 1061-05-085

n

Jan, 13 06 09.58a Ciiser Troutman Tanner Ylu-3y/-2yn p 2
MWA
®'�jir
NtDENR
North Carolina Department of Environment and Natural Resources
127 Cardinal Drive, Wilmington NC 28405 [phone] FAX (910) 35
Request for Express Permit Review
r
FILL-IN all information below and CHECK required Permit(s).
FAX or email to Cameron. Weaver(alncmail.net along with a narrative and vicinity may of the project location.
Projects must be submitted by 9:00 A.M. of the review date, unless prior arrangements are made.
APPL
PROJECT Name Pt'D �""' nIC� �' n �s
- _ orvr-o oncue
Company
❑ STREAM ORIGINATION CERTIRCATION, Stream Name
X STORMWATER
❑ COASTAL
MANAGEMENT
❑ LAND QUALITY
County
❑ Low Density ❑ High Density -Detention Pond ❑ High Density -Other
❑ Low Density -Curb & Gutter ❑ High Density -Infiltration ❑ Off Site
❑ Excavation & Fill ❑ Bridges & Culverts ❑ Structures Information
❑ Upland Development ❑ Marina Development ❑ Urban Waterfront
❑ Erosion and Sedimentation Control Plan with
❑ WETLANDS (401) ❑ No Wetlands on Site (letter from COE)
❑ Greater than 0.1 AC Wetlands Impacted
❑ Less than 0.1 AC Wetlands Impacted
acres to be disturbed.
[]Wetlands Delineated/No JD
❑Jurisdictional Determination has been done
❑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.
For DENR use only
SUBMITTAL DATES: Fee Split for multiple permits:
SW _ $
CAMA
LQS
401
Total Fee Amount $

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Jan 13 06 09:58a Cuser Troutman lanner yiu-JyI -/�I i N.o
STORMWATER NARRATIVE
GENERAL
PPD wishes to construct a parking garage as part of the Northern Downtown Revitalization
Effort. The existing property is 1.579 acres. Also, The City will be realigning the intersection
of Second and Front Streets to be a "Tee" configuration to provide for safertraffic flow in the
area. With this realignment, there will be additional property converted from City of
Wilmington Road Right of Way to be appended to the subject property area (also owned by
The City). The additional acreage will be approximately 0.141 acres and will result in a new
project property area of 1.720 acres (74907 square feet).
EXISTING SITE FEATURES
The site is currently a parking lot, all paved, and currently used by Cape Fear Community
College. Storm drainage in the Public Road Rights of Way exists at the intersection of
Brunswick and Front Streets. This storm drainage is directed to The Cape Fear River.
Topography across the site is down from east to west.
A March 15, 2005 report by S&ME revealed an infiltration rate of 9.1 inches per hour.
PROPOSEDIMPROVEMENTS
The parking garage will be six stories. The garage will result in 65,679 SF of impervious
surface on the property. Remaining areas between the garage building and the property line
will contain a combination of landscaping, hardscape, and sidewalks. Roof drains from the
top deck will be routed down along columns and sheer walls to below the bottom floor
elevation. From there, they will be collected in a storm drain system under the first floor
pavement and routed to a flow separation structure, below ground. This structure will direct
the first flush (2") to an underground infiltration system. The separation structure will cause
the runoff in excess of the first two inches to bypass the infiltration system and flow to the
aforementioned storm drains in the City Road Right of Way. The infiltration system will be at
least 2 feet above the seasonal high water table. The system will utilize plastic arched
domes for the core of the infiltration system. The arches will be encased in #57 stone. The
entire system will then be wrapped in filter fabric. The system will be sized also to satisfy
City Pre Development flow requirements.
As required by The City of Wilmington, storm drains will be sized to convey the 10-year storm
flow and prevent flooding during the 50-year storm flow.

Id UO USJ:Ofa unser iioutman tanner `J"IU-J`Jf-Ly/I p.I
C R I S E R
TROUTMAN
TANNER
FAX MEMORANDUM
TC.
FROM: / L
CAMERON WEAVER
Mark T. Arcuri, PE it 1
COMPANY:
DATE:
NCDENR Express Permitting
Jan 13, 2006
FAX NUMBER:
TOTAL NO. OF PAGES INCLUDING COVER:
350-2004
5
PHONE NUMBER.
CRISER & TROUTMAN'S PROJECT NUMBER:
796-7215
5603
RE:
CLIENT'S REFERENCE NUMBER:
PPD Parking Garage
Express Pre App
❑ URGENT ❑ FOR REVIEW ❑ PLEASE COMMENT ❑ PLEASE REPLY ❑ FOR YOUR INFORMATION
NOTES/COMMENTS:
CAMERON,
See attached Pre App form, vicinity map, and narrative. This will be a mod to permit # SW8 050427. 1
talked to Paul Bartlett yesterday and he set a review date of Feb 2. He said fee would $4,000. He
said no pre app meeting would be needed. Thanks.
Cc: Brett Powell (fx 919-836.1280)
Wes Nau (fx 919-684-3742)
CRISER TROUTMAN TANNER CONSULTING ENGINEERS
Post Office Box 3727 N'itmington. NC 28406 1 3809 Peachtree Ave. Suite 102 Wlmington. NC 28403 p 910.397.2929 f 910.397.2971

Jan 13 06 09'58a Criser Troutman Tanner
91U-Ji)1-2911 PA
I
STORMWATER NARRATIVE
Project:
PPD PARKING GARAGE
Location:
155 Brunswick Street
Wilmington, North Carolina
New Hanover County
Prepared for:
River Ventures, LLC
3151 South 17th Street
Wilmington, NC 28412
Prepared by:
Mark T. Arcuri, PE
Criser Troutman Tanner Consulting Engineers
3809 Peachtree Avenue
Suite 102
Wilmington, NC 28403
Date:
January 13, 2006
CTT Project 5603.00