SW8060333_COMPLIANCE_20060410

STORMWATER DIVISION CODING SHEET
POST -CONSTRUCTION PERMITS
PERMIT NO.
SW
DOC TYPE
❑ CURRENT PERMIT
❑ APPROVED PLANS
❑ HISTORICAL FILE
�DCOMPLIANCE EVALUATION INSPECTION
C
DOC DATE
�f•1'/,L�
YYYYMMDD

INFILTRATION TRENCH ANALYSIS Filename: S:IWPDATAIWQSIINTRENCH1060333
Project # SW8 060333 Date
Project Name Hampstead Commercial Center Reviewer
Recvng Stream Old Topsail Creek Classification
Drainage Basin Cape Fear Index #
Site Area acres Drainage Area
Impervious Area Calculation
10-Apr-06
R. Gordon
SA,HQW
18-87-12
62,622 SF
Acres
Rational Cc (list C after each BUA)
Buildings 12000 1
Streets 1
OS Prkg 41730 1
OS sidewalks 1600
Total = 5.3301 % Impervious- 88.4%
Volume/Storage Calculation
If Rational Method is used, place a 1 in this box 0
Required
Provided
Design Storm
RV
Volume to Store
Pipe Diameter
Length Of a Single run of Pipe
Number of Pipe Runs in Trench
Storage In Piping
Total Storage in Piping
Cross -Sectional Area Of Pipe Runs
Length Of Trench
Width Of Trench
Height Of Trench
Cross -Sectional Area Of Trench
Voids Volume, 40%
Total Voids Volume
Total Volume Provided
Elevation Of Bottom Of Trench
Elevation Of SHWT
Overflow Elevation
Exfiltration Rate / Drawdown
Reported Hydraulic Conductivity
Bottom Surface Area
Drawdown Time
25 YEAR 24 HOUR STORM NIA
Intensity, i = .33 inches / hour
Qr=CiA=
Qp through the bottom of the basin=
Cc: 0.88
1.5 in
0.85
5616;:CF
Pipe Size 1 I Pipe Size 2
3
Feet
162
Feet
3
each
3435
0 Cubic Feet
<3:435 Cubic Feet
21.206
0.000 SF
165
Feet
17.86
Feet
4
Feet
71.44
0.00 SF
6691'X.
CF
CF
Cubic Feet
49 Mean Sea Level
47 Mean Sea Level
52.98 Mean Sea Level
1.4583 Cubic Feet Per Hour Per Sq Ft
2946.9 Square Feet
<1'-54" hours
0.42 CFS
1.1937 CFS Must be > Qr
10 YEAR 10 MIN HIGH INTENSITY EVENT
Intensity, i = 6.3 inches / hour
Volume for 10 yr. 10 min. event =.
4789.08 CF < 6691 CF

12-12-03; 10: 52AM:ALLEN AND MCDONALD
ARTICLES OF ORGANIZATION
OF
MBD HOLDINGS, LLC
SOSID: 0702646
Date Filed: 12/12/2003 2:03:00 PM
Elaine F. Marshall
North Carolina Secretary of State
C200331100061
Pursuant to 57C-2-20 of the General Statutes of North Carolina, the undersigned hereby submits
these Articles of Organization for the purpose of forming a Limited Liability Company.
The name of the Limited Liability Company is MBD HOLDINGS, LLC.
2. The latest date on which the Limited Liability Company is to dissolve is January 1, 2073.
3. The name and address of each organizer executing the Articles of Organization is as
follows:
James A. MacDonald
1508 Military Cutoff Road
Suite 102
Wilmington, N.C_ 28403
4. The street address and county of the initial Registered Office of the Limited Liability
Company is 1609 Country. Club Road, Wilmington, New Hanover County, North Carolina, 28403.
5. - The mailing address if different from the street address of the initial Registered Office is:
P.O.Drawer 3007, Wilmington, New Hanover County, Wilmington, North Carolina, 28406.
6. The name of the initial Registered Agent is Michael Davis.
7. The street address and county of the principal office of the limited liability company is 16N
Country Club Road, Wilmington, New Hanover County, North Carolina, 28403.
The mailing address and county of the principal office of the limited liability company is P.Q.
Drawer 3007, Wilmington, New Hanover County, North Carolina, 28406.
8. Check one of the following:
_ Member -managed LLC: all of the members by virtue of their status as members shall
be managers of this Limited Liability Company.
X Manager -managed LLC: except as provided by NCGS §57C3-20(a), the members of
this Limited Liability Company shall not be managers by virtue of their status as members.
9. These Articles will be effective upon filing.
This the, ?day of October, 2003.
eA41)onald, Orj—amj�r__

pEPAR77Ne.
A
LIMITED LIABILITY COMPANY
ANNUAL REPORT
NAME OF LIMITED LIABILITY COMPANY: Afbd Holdings, LLC
STATE OF INCORPORATION: NC
SOSID: 0702646
Date Filed: 1/24/2006 9:28 AM
Elaine F. Marshall
North Carolina Secretary of State
SECRETARY OF STATE L.L.C. Ill NUMBER: 0702646 FEDERAL, EMPLOYER ID NUMBER: 20-0628374
NATURE OF BUSINESS: Rental Propertv
REGISTERED AGENT: Davis, Michael B
REGISTERED OFFICE MAILING ADDRESS: P.O. Draµ-er 3007
Wilmington, NC 28406
REGISTERED OFFICE STREET ADDI2I3SS: 1609 Country Club Road
Wilmington, NC 28403 County: New Hanover
PRINCIPAL OFFICE 'TELEPHONE NUMBER: 910-799-6635
PRINCIPAL, OFFICE MAILING ADDRESS: P.O. Drawer 3007
ihibnington, ArC 28406
PRINCIPAL OFFICE STREET ADDRESS
MANAGERS/MEMBERS/ORGANIZERS:
Michael B Davis
Title: Manager
1609 COUNTRY CLUB RD
Wilmington, NC 28403
1609 Country Club Road
Wibmington, NC 28403
CERTIFICATION OF ANNUAL REPORT MUST BE COMPLETED I3Y ALL LIMITED LIABILITY COMPANIES
Michael B Davis
1/24/2006
FORM MUST BE SIGNED BY A MiVNAGER/MEMBER
DATE
Michael B Dads Manager/Member
TYPF OR PRINT NAh7F. TYPE OR PRINT TITLE
ANNUAL REPORT FF,F: E-Paid Secretary or State • Corporations Division • Post Office Box 29525 • Raleigh, NC 27626-0525

StormTech-
Subsurface Stormwater Management'
Porosity of Structural Baekfill Tech Sheet # 1
Rev. 12/20/05
General:
StormTech advises that a porosity of 40% is appropriate to use for the storage capacity
of structural aggregate used in the bedding and embedment zones around StormTech
chambers. This memo provides technical support for the use of a porosity of 40%. The major
points of the memo are:
40% porosity is appropriate for the washed, open graded, angular aggregate material
StormTech recommends for foundation and embedment.
• Most of the porosity data available is based on a compacted condition. StormTech
requires compaction of the foundation (bedding) and allows dumped aggregate
embedment around the chambers.
Test data indicates that although the porosity of the compacted foundation is
approximately 39%, the porosity of the dumped backfill in the embedment zone is
typically greater than 40% and the calculated weighted average porosity exceeds 40%
for typical StormTech systems.
Porosity is protected from soils migration by a non -woven geotextile that surrounds the
entire system.
Terms:
Porosity (n) is defined as the volume voids over the total volume expressed as a
percent: n = (V / Vt ) x 100%. Other terms commonly used to describe porosity include; "voids"
and "void space". .A related term that should not be confused with porosity is void ratio (e)
which is the volume of voids over the volume of solids expressed as a decimal: e = V / Vs.
Compilation of Known Test Data:
Sample
Data Source
Porosity
Bulk Density
Test / Description
AASHTO # 4
StormTech lab
39.9%
94.3 Ibs/ft3
dumped, corrected'
AASHTO # 57
StormTech lab
45.4%
87.2 Ibs/ft3
dumped, corrected'
AASHTO # 4
StormTech lab
37.4%
103.0 Ibs/ft3
jiggled - tamped, corrected'
AASHTO # 57
StormTech lab
38.7%
97.7 Ibs/ft3
jiggled - tamped, corrected'
AASHTO # 57
NTH lab
50 - 51 %
tapped & agitated, dried
AASHTO # 57
NTH lab
50 - 52 %
tapped & agitated, dried
AASHTO # 3
NTH lab
53 - 54%
tapped & agitated, dried
-1 1/"
Anderson Eng. Cons.
41.9%
96.8 Ibs/ft3
jiggled - tamped, C293
-1 '/2"
Anderson Eng. Cons.
35.3%
101.7 Ibs/ft3
jiggled - tamped, C293
-1 '/2"
Anderson Eng. Cons.
37.8%
98.6 Ibslft3
jiggled - tamped, C293
-1 '/2"
Anderson Eng. Cons.
41.3%
93.6 Ibs/ft3
jiggled - tamped, C293
-1 1/2"
Anderson Eng. Cons.
38.2%
98.7 Ibs/ft3
jiggled - tamped, C293
-3/4"
Anderson Eng. Cons.
38.5%
100.3 Ibslft3
jiggled - tamped, C293
-3/4"
Anderson Eng. Cons.
38.9%
97.9 Ibs/ft3
jiggled - tamped, C293
20 Beaver Road I Suite 1041 Wethersfield, CT 106109I Toll Free 888-892-26941 Fax [phone] www.stormtech.com

Compilation of Known Test Data (continued):
Sample
Data Source
Porosi
Bulk Density
Test / Description
AASHTO # 4
Universal Eng. Semi.
44.3%
78.6 Ibs/ft3
rodded - tamped, C294
AASHTO # 57
Universal Eng. Serv.
43.2%
79.8 Ibs/ft3
rodded - tamped, C294
AASHTO # 4
Universal Eng. Serv.
46.1%
70.8 lbs/ft3
rodded - tamped, C295
AASHTO # 57
Universal Eng. Serv.
42.8%
74.8 IbS/ft3
rodded - tamped, C295
1 Testing was conducted by StormTech in Oct of 2003 using aggregate from Connecticut.
Water was used to fill voids and a correction factor that reduced porosities by 3 to 16%
was calculated and applied to correct for wall effects of the test container.
2 Testing was conducted by NTH Consultants, Exton, PA in Dec 2002 for ADS. This was
dry testing in accordance with the "Civil Engineering Reference Manual, Sixth Edition" by
Michael R. Lindburg, PE.
3 Testing was conducted by Anderson Engineering Consultants, Inc., Little Rock, AR in
February, 2000 for 7 different aggregate samples from four suppliers in Arkansas.
4 The material tested was lime rock from central Florida. Testing was conducted by
Universal Engineering Sciences in Orlando, FL in November, 2005.
5 The material tested was recycled, crushed concrete from central Florida. Testing was
conducted by Universal Engineering Sciences in Orlando, FL in November, 2005.
ASTM C29 is the "Standard Test Method for Bulk Density ("Unit Weight") and Voids in
Aggregate".
Porosity References:
• "Urban Runoff Quality Management' WEF MOP 23 / ASCE MOP 87. Table 5.12
lists uniform sized gravel at 40%.
• "Controlling Urban Runoff:" by Thomas R. Schueler, July 1987 describes storage
volume of the void space in the trench at 40% of the excavated trench volume.
• "On -site Stormwater Management: Applications for Landscape and Engineering"
Second Edition by Bruce Ferguson and Thomas Debo states that open graded
crushed stone has 40% void space.
3/4 - 2 INCH WASHED,
CRUSHED, ANGULAR STONE
AASHTO M288 CLASS 2
NON -WOVEN GEOTEXTILE-n
12" MIN. TYP. i "�
DUMPED EMBEDMENT
EXCEEDS 40% POROSITY
o� 6" MIN,
I i DEPTH OF STONE
TO BE DETERMINED
BY DESIGN ENGINEER
6" MIN.'

TopoZone - The Web's Topographic Map
Page 1 of 1
It
topozone
.01
f,
z
i
Ik
0 0.1 0.2 0.3 0.4 0.5 km
�1
0 0.09 0.18 0.27 0.36 0.45 mi
Map center is 340 22' 50"N, 770 41' 48"W (WGS84/NAD83)
Topsail quadrangle M=-9.17
Projection is UTM Zone 18 NAD83 Datum G=-1.524
http://www•topozone.comlprint.asp?z=18&n=3807648.89835763&e=252051.274119461 &s... 4/7/2006

NC DENR - D1V1SON OF WATER QUALITY
.0311 CAFE FEAR RIVER BASIN
2B .0300
Name of Stream
Description
Class
Classification
Date Index No.
Topsail Sound and Middle
All waters between the
SA;ORW
O1/01/90
18-87-11.7
Sound ORW Area
Barrier Islands and the
mainland located between a
line running from the
western most shore of
Mason Inlet to the
southwestern shore of Howe
Creek and a line running
from the western shore of
New Topsail Inlet to the
eastern mouth of Old Topsail
Creek
Old Topsail Creek
From source to
SA;HQW
08/09/81
18-87-12
Intracoastal Waterway
Howard Channel
From Old Topsail Inlet to
SA;ORW
0I/01/90
18-87-13
Intracoastal Waterway
Mill Creek (Betts Creek)
From source to
SA;HQW
08/09/81
18-87-14
Intracoastal Waterway
Long Point Channel
From Old Topsail Inlet to
SA;ORW
01/01/90
18-87-15
Intracoastal Waterway
Green Channel
From Rich Inlet to
SA;ORW
01/01/90
18-87-16
Intracoastal Waterway
Cedar Snag Creek
From Green Channel to
SA;ORW
01/01/90
18-87-17
Intracoastal waterway
Butler Creek
From Nixon Channel to
SA;ORW
01/01/90
18-87-18
Intracoastal waterway
Futch Creek
From source to
SA;HQW
08/09/81
18-87-19
Intracoastal Waterway
Nixon Channel
From Rich Inlet to
SA;ORW
01/01/90
18-87-20
Intracoastal Waterway
Middle Sound
Entire Sound
SA;ORW
01/01/90
1B-87-21
Pages Creek
From source to
SA;HQW
08/09/81
1B-87-22
Intracoastal Waterway
Howe Creek
From source to
SA;ORW
O1/01/90
18-87-23
Intracoastal Waterway
Intracoastal Waterway
From the western mouth of
SA;HQW
08/09/81
18-87-(23.5)
Howe Creek to the
southwest mouth of Shinn
Creek, exclusive of the
Wrightsville Beach
Recreational Area
59