Document ID: EPA-HQ-OW-2004-0002-0495
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
Name:
Falcon
100
Rig
Type:
Semisubmersible
F&
G
Pacesetter
L­
900
Total
Installed
Power
Generation
Capacity
(
7,800
HP)

Number
of
Cooling
Water
Intake
Structures
(
CWISs)
2
Brief
description
of
each
CWIS
(
e.
g.,
sea
chest,
simple
pipe)
Sea
Chest
Rough
dimensions
of
each
CWIS
and
indicate
whether
onboard
CWIS
has
an
existing
flange
16"
intake
pipe
reduced
to
a
10"
manifold
with
140'
of
8"
saltwater
discharge
piping
to
main
deck.
Screen
type
(
e.
g.,
strainer,
wedge
wire)
with
mesh
size
Simplex
Basket
Strainers
Total
Design
Specifications
for
Daily
Maximum
Water
Intake
Volume
of
each
CWIS
1,151,136
gal
(
27,408
bbls)
Total
Daily
Water
Intake
Volume
of
each
CWIS
(
Set­
up/
Drilling)
1,151,136
gal
(
27,408
bbls)
Design
Specs
for
Through
Screen
Velocity
of
each
CWIS
(
i.
e.,
Q=
V*
A)
(
Set­
up/
Drilling)
1.27
ft/
second
List
of
Purposes
of
Cooling
Water
Intakes
(
e.
g.,
cool
crude
oil,
produced
water,
power
generators,
drill
pipe
brakes)
Winch
brake
cooling,
Drawworks
Brake
Water
Cooling,
HPU
(
High
Pressure
Unit)
,
Air
Compressors
&
A/
C
unit
water
cooled
condenser
List
of
Purposes
of
Non­
cooling
Water
Intakes
(
e.
g.,
fire
water,
hotel
loads)
Water
Makers,
Fire
Main,
Ballast,
Sanitary,
&
Pits
Total
Volume
of
Water
Intake
for
Ballasting,
Duration
of
the
Ballast
intake,
and
the
Through
Screen
Velocity
of
the
Ballast
intake
1250
GPM,
max.
Duration
=
4
hours
299,964
gals
(
7,142
bbls)
Velocity
=
1.99
ft/
second.
16"
sea
chest
inlet
piping.
Mitigation
Measures
for
reducing
Exotic
Species
Migration
through
Ballast
water
The
rig
does
not
carry
much
ballast
water
from
location
to
location.
It
is
taken
on
and
dumped
at
the
same
location.
Mitigation
Measures
for
reducing
Impingement
and
Entrainment
of
Aquatic
Organisms,
as
well
as
Bio­
fouling
Prevention
Measures
Sea
chest
screens,
simplex
baskets,
cathodic
protection(
Al/
Cu
anodes
1amp
current)

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