SW8050222_COMPLIANCE_20050225

STORMWATER DIVISION CODING SHEET
POST -CONSTRUCTION PERMITS
PERMIT NO.
SwgcQAl
DOC TYPE
❑ CURRENT PERMIT
❑ APPROVED PLANS
❑ HISTORICAL FILE
P�2COMPLIANCE EVALUATION INSPECTION
DOC DATEo`�j_
YYYYM M DD

INFILTRATION TRENCH ANALYSIS Filename: 050222-1
Project # SW8 050222
Project Name Housing Warehouse A, UNCW
Recvng Stream Bradley
ley Creek
Drainage Basin Cape Fear
Site Area 0.03 acres
Impervious Area Calculation
Buildings
Parking/Asphalt
Concrete
Date
Reviewer
*Classification
Index #
Drainage Area
* outside the 575'AEC
25-Feb-05
P.Bartlett
Sc
18-87-24-4-(2)
1310 SF
0.03 Acres
Rational Cc (list C after each BUA)
960 0.95
0.95
0.95
.. .. .. .. ...
Total
Volume/Storage Calculation
If Rational Method is used, place a 1 in this box
Required
Design Storm
RV
Provided
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%
Trench Volume per linear foot
Minimum Trench length required
Total Volume Provided
Elevation Of Bottom Of Trench
Elevation Of SHWT
Overflow Elevation
Ekfiltration Rate/ Drawdown
Reported Hydraulic Conductivity
Bottom Surface Area
25 YEAR 24 HOUR STORM NIA
Intensity, i = .33 inches / hour
Qr-- C i A =
Qp through the bottom of the basin=
% Impervious= 73.3%
Cc: 0.75
1 in
0.71
€82s CF
Pipe Size 1 Pipe Size 2
3 Feet
7.5 Feet
1 '2-
53 Cubic Feet
Cubic Feet
7.069
9 Feet
8.35 Feet
1.5 Feet
12.53 SF
...........
CF
Cubic Feet
Feet
Cubic Feet
9
3:
34.5 Mean Sea Level
32.5 Mean Sea Level
37.6 Mean Sea Level
26 Cubic Feet Per Hour Per Sq Ft
75-15 Square Feet
hours
0.01 CFS
0.5428 CFS Must be > Qr
10 YEAR 10 MIN HIGH INTENSITY EVENT
Intensity, i = 6.3 inches / hour
Volume for 10 yr. 10 min. event =
85.21 CF < 83 CF

CULTEC, Inc.
Typical Cross Section Contactor® 10OHD Unpaved H2O Installation
I I I
1 2"' — 2" WASHED,
CRUSHED STONE FINISHED GRADE
CULTEC 410 FILTER FABRIC
RECOMMENDED, NOT REQUIRED 85% COMPACTED FILL e
CULTEC CONTACTOR 10OHD CULTEC 410
HEAVY DUTY H-24 CHAMER7 7 FILTER FABRIC
B
TOP, SIDES AND BOTTOM
/ r
In
/ rfl
1'-0" 36" 6" STONE BASE E
GENERAL NOTES TYp,
GontacAll CotarO ctorO GO CULTEC,hamber must Brookfield, CT. TYPICAL CROSS SECTION CONTACTOR 10OHD .
All Conlactore 1 W Chambers must be installed In
acIVEL
regulations. F cordance wish alf applicable focal, state and federal R.F C
UNPAVED H-20 CULTEC CHAMBER SYSTEM
Refer to manufacturer, CULTEC, INC.'s recommended
Cont instoaguidettnea. (2.97 CF./ LF.) FEB 2 3 NDa99
Ail Contactors 700WD H2O Heavy Duly units are
marked with a 4' stripe along the length of the chamber.
N.T.S. � W
y-
CALCULATIONS BASED ON
40% STONE VOID e
I Designed by Checked by Approved ay -date Filename Oate Srale
TM R,H LUIS TAPIR G-C 5122/12 CA❑ FILE 6/11/12 N/5
INC. 100 CROSS SECTION
CULTEC Contactor®& Recharger"� 878 FEDERAL ALRD.CULTRD. FX: (203) 7751462
" ^•..•�..r Plastic Septic 8 Stormwater Chambers BROKFI ELD CT 06804 PH:18004CULTEC
PH: (203) 7754416 140KD UNPVD H21 Edition Sheet
.CUl-TEG,COM
i
L_ 1
CULTEC, Inc.
878 Federal Road • P.O. Box 280 • Brookfield, CT 06804 USA
[phone] 9 (800) 4-CULTEC • Fax: [phone] . www.cult2g.co • [e-mail]
Copyright 0 2003 CULTEC, Inc. All rights reserved.
STORMWATER SECTION Page 34 of 50
J

CULTEC, Inc.
Storage Capacities of CULTEC Contactor@ & RechargerTM Chambers
For design and technical assistance, call CULTEC, Inc. at 800-4-CULTEC (800-428-5832). 4�
Table 1
-- -Code
Lul
Le
D.,
bu
A,
S,
D,
Duw
Model
Lay-
Up
Length
it
Length
Adjustment
It
Width
In.
Height
In.
Chamber
Volume
fl3/ft
40%
Stone
Vold
Volume
ft3/ft
Total
Retention
Storage
ft3/ft
TataI
Retention
Storage'
it'/unit
Surface
Area
Required
ft2/unit
Stone
Rewired'
ft /unit
Depth of
installation
to top of
chamber°
it
Design
Unit
Widths
it
Field DrainTM C-
8.00
0.34
48
8.5
1.68
1.27
2.95
23.54
32.00
25.23
1.21
4.00
Contactors EZ-2
8.00
0.34
16
12.5
0.82
0.66
1.48
11.78
1 12.72
13.05
1.55
1.59
Contactor@ 75
6.25
0.75
30
12.4
1.60
0.90
2..5.0
15.59
15.63
13.96
1.54
2.50
Contactor® 100
7.50
1.50
36
12.5
1.86
1.11
2.97
22.25
1 22.50
20.74
1.55
-3.00
Contactor® 125
6.25
1.00
30
18.0
2.22
1.12
3.34
20.83
15.63
17.38
2.00
2.50
Bechar erTM 180
6.33
1 1.00
36
20.5
1 3.45
1.27
4.72
29.88
18.99
20.10
2.21
3.00
Bechar erTM 280
7.00
1 1.00
47
26.5
6.08
2.04
8.12
56.81
28.00
35.61
2.80
4.00
Bechar erTM 330
6.25
1 1.17
52
30.5
7.44
2.91
10,35
64.63
30.19
45.33
3.05
4.83
Fiechar erTM 400
6.17
1.30
52
32.5
7.96
3.02
10.98
67.72
29.81
46.50
3.21
4;83
RECEIVED
SF�E �}-S�-(cD05�
Based on lay-up length of chamber Including separation requirement if any. BY: r
s Based on lay-up length of chamber including separation requirement - if any.
3 Based on lay-up length of chamber including separation requirement - if any.
Calculation does not include burial requirements above the chamber. Refer to Burial Requirements Chart for additional depth requirements.
5 Includes unit width plus separation requirement - If any. Contactor® EZ-24 placed 19" on center. RechargerTm 280 placed 48" on center. Recharger7m 330 & 400 placed 58" on
center.
CULTEC, Inc.
878 Federal Road • P.O. Box 280 . Brookfield, CT 06804 USA
[phone] • (800) 4-CULTEC • Fax: [phone] + www,cultec.com • [e-mail]
Copyright ® 2003 CULTEC, Inc. All rights reserved.
STORMWATER SECTION Page 3 of 50

mi
Date Design It NORRIS, KUSKE & TUNSTALL Sheet
902Market St. CONSULTING ENGINEERS, INC. Wilmington, N.C.28401 / Of
Check Job �Pr7�- ,� For _�� � �j�;� Jo
C.L. c Tft7 C�—�. F71VA)
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ti
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04194 UNCW Warehouse Expansion Type 11124-hr Rainfall=7.00"
Prepared by Andrew & Kuske Consulting Engineers, Inc Page 2
H droCADS 7.01 s/n 000479 01986-2004 Applied Microcomputer Systems 2/13/05
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: Warehouse Expansion Runoff Area=1,260 sf Runoff Depth=5.48"
Tc=5.0 min CN=87 Runoff=0.18 cfs .0.013 of
Pond 2P: Infiltration System Peak Elev=37.62' Storage=86 cf Inflow=4.18 cfs 0.013 of
Discarded=0.05 cfs 0.013 of Primary=0.09 cfs 0.001 of Outflow=0.14 cfs 0.013 of
Total Runoff Area = 0.029 ac Runoff Volume = 0.013 of Average Runoff Depth = 6.48"

04194 UNCW Warehouse Expansion Type 11124-hr Rainfall=7.00"
Prepared by Andrew & Kuske Consulting Engineers, Inc Page 3
HydroCAD® 7.01 s/n 000479 m 1986-2004 Applied_ Microcomputer Systems - 2/13105
Subcatchment 1S: Warehouse Expansion
[491 Hint: Tc<2dt may require smaller dt
Runoff - 0.18 cfs @ 12.07 hrs, Volume= 0.013 af, Depth= 5.48"
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 (sf) CN Description
960 98 Roof area of expansion
300 50 Grass
1,260 87 Weighted Average
Tc Length Slope Velocity Capacity Description
min feet ftlft ftlsec cfs
5.0 Direct Entry, Draiage area
n
LL
Subcatchment 1S: Warehouse Expansion
Hydrograph
Time (hours)
p RunoTr

04194 UNCW Warehouse Expansion Type 111 24-hr Rainfall=7.00"
Prepared by Andrew & Kuske Consulting Engineers, Inc Page 4
HydroCADO 7.01 sin 000479 © 1986-2004 Applied Microcomputer Systems 2/13/05
Pond 2P: Infiltration System
(931 Warning: Storage range exceeded by 0.02'
(85) Warning: Oscillations may require Finer Routing>1
Inflow Area = 0.029 ac, Inflow Depth = 5.48"
Inflow = 0.18 cfs @ 12.07 hrs, Volume= 0.013 of
Outflow = 0.14 cfs @ 12.20 hrs, Volume= 0.013 af, Atten= 22%, Lag= 7.7 min
Discarded = 0.05 cfs @ 11.80 hrs, Volume= 0.013 of
Primary - 0.09 cfs @ 12.20 hrs, Volume= 0.001 of
Routing by Stor-Ind method, Time Span= 0.00-24.00 hrs, dt= 0.05 hrs
Peak Elev= 37.62' @ 12.20 hrs Surf.Area= 79 sf Storage= 86 cf
Plug -Flow detention time= 12.8 min calculated for 0.013 of (99% of inflow)
Center -of -Mass det. time= 9.8 min ( 797.9 - 788.1 )
# Invert Avail.Storage Storage Description
1 34.50' 36 cf Custom Stage Data (Prismatic) Listed below
119 cf Overall - 28 cf Embedded = 91 cf x 40.0% Voids
2 35.00' 28 cf 32.1"W x 12.0"H x 7.60'L Cuitec C-100 x 2 Inside #1
3 34.00' 22 cf Custom Stage Data (Prismatic) Listed below -impervious
86 cf Total Available Storage
Elevation Surf.Area Inc.Store Cum.Store
{feet) (sq-ft) (cubic -feet) (cubic -feet)
34.50 79 0 0
36.00 79 119 119
Elevation Surf.Area Inc.Store Cum.Store
(feet) (sq-ft) (cubic -feet) (cubic -feet)
34.00 6 0 0
37.60 6 22 22
# Routina Invert Outlet Devices
1 Discarded 0.00' 0.036100 fpm EAltration over entire Surface area
2 Primary 37.60' 10.0' long x 2.6' high Sharp -Crested Rectangular Weir 2 End Contractions)
Discarded OutFlow Max=0.05 cfs @ 11.80 hrs HW=34.51' (Free Discharge)
t-I=Exfiltration (Exfiltration Controls 0.05 cfs)
PrimaryOutFlow Max=0.06 cfs @ 12.20 hrs HW=37.62' (Free Discharge)
L2=S harp -Crested Rectangular weir (Weir Controls 0.06 cfs @ 0.4 fps)

04194 UNCW Warehouse Expansion Type H/ 24-hr Rainfall=7.00"
Prepared by Andrew & Kuske Consulting Engineers, Inc Page 5
HydroCAD® 7.01 s/n 000479 C 1986-2004 Applied Microcomputer Systems 2/13/05
Pond 2P: Infiltration System
Hydrograph
M
0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24
Time (hours)