Document ID: EPA-HQ-OW-2004-0002-0508
Agency: epa
Document Type: Supporting & Related Material
Title: 
Posted Date: 2004-11-30T05:00Z

Cooling
Water
Intake
Structure
(
CWIS)
Information
Data
Required
Rig
Information
Rig
Names:
Glomar
Adriatic
1
Glomar
Adriatic
9
Glomar
Adriatic
2
Glomar
Adriatic
10
Glomar
Adriatic
3
Glomar
Adriatic
11
Glomar
Adriatic
4
Compact
Driller
Glomar
Adriatic
5
Galveston
Key
Glomar
Adriatic
6
Key
Manhattan
Glomar
Adriatic
7
Key
Singapore
Glomar
Adriatic
8
Rig
Type
Jackup
MLT
116C
Total
Installed
Power
Generation
Capacity
6075
HP
Number
of
Cooling
Water
Intake
Structures
(
CWISs)
3
at
1100
gpm
submersible
pumps
average
Brief
description
of
each
CWIS
(
e.
g.,
sea
chest,
simple
pipe)
15"
pipe
or
flow
shroud
Rough
dimensions
of
each
CWIS
and
indicate
whether
onboard
CWIS
has
an
existing
flange
14"
ID
w/
out
flange
Screen
type
(
e.
g.,
strainer,
wedge
wire)
with
mesh
size
Basket
Strainers
Total
Design
Specifications
for
Daily
Maximum
Water
Intake
Volume
of
each
CWIS
1.68
million
gal
(
40,000
bbls)

Total
Daily
Water
Intake
Volume
of
each
CWIS
(
Set­
up/
Drilling)
1.55
million
gal
(
37,000
bbls)

Design
Specs
for
Through
Screen
Velocity
of
each
CWIS
(
i.
e.,
Q=
V*
A)
(
Set­
up/
Drilling)
2.3
ft/
sec
List
of
Purposes
of
Cooling
Water
Intakes
(
e.
g.,
cool
crude
oil,
produced
water,
power
generators,
drill
pipe
brakes)
Winch
cooling,
Brake
Water
Cooling,
HPU
(
High
Pressure
Unit)
,
Compressor
Cooling,
burner
boom
spray
cooling
List
of
Purposes
of
Non­
cooling
Water
Intakes
(
e.
g.,
fire
water,
hotel
loads)
Water
Makers,
Fire
Main,
Ballast,
Sanitary,
Pits,
MP
liner
wash,
shaker
cleaning,
preload
Total
Volume
of
Water
Intake
for
Ballasting,
Duration
of
the
Ballast
intake,
and
the
Through
Screen
Velocity
of
the
Ballast
intake
1.5
million
gal
(
11,943
kips)
6­
9
hours
2.3
fps
Mitigation
Measures
for
reducing
Exotic
Species
Migration
through
Ballast
water
None
Mitigation
Measures
for
reducing
Impingement
and
Entrainment
of
Aquatic
Organisms,
as
well
as
Bio­
fouling
Prevention
Measures
duplex
and
simplex
baskets,

Is
the
Rig
equipped
with
a
Radiator
Cooling
System
for
the
Main
Engines?
Yes