Document ID: EPA-HQ-OW-2004-0002-0492
Agency: epa
Document Type: Supporting & Related Material
Title: 
Posted Date: 2004-11-30T05:00Z

OCS
Platform
CWIS
Information
Company:
ExxonMobil
Production
Company
Prospect
or
Field
Name:
Alaminos
Canyon
25
OCS
Lease
and
Block:
Alaminos
Canyon
25
OCS­
G
10380
Platform
Name:
A
CWIS
Information
Requirements
Platform
Information
Number
of
CWISs
1
Brief
description
of
each
CWIS
(
e.
g.,
sea
chest,
simple
pipe)
Simple
pipe
Rough
dimensions
of
each
CWIS
and
indicate
whether
CWIS
has
existing
flange
47"
diameter
with
2"
perforated
holes
last
10.5',
bottom
plate
perforated
with
2"
holes.
Extends
approximately
 
560'
below
surface
of
GOM.
No
flange
Screen
type
(
e.
g.,
strainer,
wedge
wire)
with
mesh
size
80
Mesh
inlet
strainer.

Total
daily
maximum
design
water
intake
volume
of
each
CWIS
20,736,000
gallons
(
14,400
gpm).
All
four
sea
water
lift
pumps
at
capacity.
Total
daily
water
intake
volume
of
each
CWIS
(
set­
up/
drilling)
10,080,000
gallons
(
7000
gpm)

Total
daily
cooling
water
intake
volume
of
each
CWIS
(
set­
up/
drilling)
10,080,000
gallons
(
7000
gpm)

Design
through
screen
velocity
of
each
CWIS
(
i.
e.,
Q
=
V
*
A)
(
set­
up/
drilling)
6.96
ft/
sec
(
At
7000
gpm)
Q=
7000
gpm
=
26.5
m^
3/
min
=
935.8
ft^
3/
min
List
purposes
of
cooling
water
intake
(
e.
g.,
cool
crude
oil,
produced
water,
power
generators,
drill
pipe
brakes).
Cools
closed
loop
fresh
water
system
which
in
turn
cools
lube
oil.

List
purposes
of
cooling
water
intake
(
e.
g.,
cool
crude
oil,
produced
water,
power
generators,
drill
pipe
brakes).
List
purposes
of
non­
cooling
water
intakes
(
e.
g.,
fire
water,
hotel
loads)
other
than
ballast
water.
Reverse
osmosis
water
maker,
fire
water,
and
water
wash
system.
These
are
only
used
intermittently.
Total
volume
of
water
intake
for
ballasting,
duration
of
ballast
intake,
and
through
screen
velocity
of
ballast
intake.
Passive
Ballast
System­
minimal.

Mitigation
measures
for
reducing
impingement
and
entrainment
of
aquatic
organisms,
and
biofouling
prevention
measures.
Sea
water
strainer.

Mitigation
measures
for
reducing
exotic
species
migration
through
ballast
water.
None­
Passive
Ballast
System.

CWIS
=
Cooling
Water
Intake
Structure
OCS
Platform
CWIS
Information
Company:
ExxonMobil
Production
Company
Prospect
or
Field
Name:
Green
Canyon
19/
18
OCS
Lease
and
Block:
Green
Canyon
18
OCS­
G
4940
Platform
Name:
A
CWIS
Information
Requirements
Platform
Information
Number
of
CWISs
2
Brief
description
of
each
CWIS
(
e.
g.,
sea
chest,
simple
pipe)
Simple
pipe
Only
one
is
operating
at
any
time.
Rough
dimensions
of
each
CWIS
and
indicate
whether
CWIS
has
existing
flange
Each
caisson
extends
approximately
60ft
below
the
water
line
and
is
20"
in
diameter.
No
flange.
Screen
type
(
e.
g.,
strainer,
wedge
wire)
with
mesh
size
None
at
intake,
strainer
by
water
maker
and
air
cooler.
1/
4"
mesh.
Total
daily
maximum
design
water
intake
volume
of
each
CWIS
2,376,000
gallons
per
day
Total
daily
water
intake
volume
of
each
CWIS
(
set­
up/
drilling)
All
water
is
used
for
cooling
except
a
little
is
used
in
case
of
fire
and
for
potable
water.

Total
daily
cooling
water
intake
volume
of
each
CWIS
(
set­
up/
drilling)
~
2,100,000
gallons
per
day
Design
through
screen
velocity
of
each
CWIS
(
i.
e.,
Q
=
V
*
A)
(
set­
up/
drilling)
1.70
ft/
sec
List
purposes
of
cooling
water
intake
(
e.
g.,
cool
crude
oil,
produced
water,
power
generators,
drill
pipe
brakes).
Cool
compressor
discharge
gas
from
each
stage.
Cool
platform
air
supply.
Cool
high
pressure
gas.
List
purposes
of
cooling
water
intake
(
e.
g.,
cool
crude
oil,
produced
water,
power
generators,
drill
pipe
brakes).
List
purposes
of
non­
cooling
water
intakes
(
e.
g.,
fire
water,
hotel
loads)
other
than
ballast
water.
Fire
water.
Potable
water
supply.

Total
volume
of
water
intake
for
ballasting,
duration
of
ballast
intake,
and
through
screen
velocity
of
ballast
intake.
N/
A
No
ballast
water
Mitigation
measures
for
reducing
impingement
and
entrainment
of
aquatic
organisms,
and
biofouling
prevention
measures.
Screens
in
place
throughout
system.
No
chemicals
are
injected
into
the
water
supply
and
the
water
does
not
come
into
contact
with
any
process
fluids.
Mitigation
measures
for
reducing
exotic
species
migration
through
ballast
water.
N/
A
No
ballast
water
CWIS
=
Cooling
Water
Intake
Structure
OCS
Platform
CWIS
Information
Company:
ExxonMobil
Production
Company
Prospect
or
Field
Name:
Main
Pass
280
OCS
Lease
and
Block:
Main
Pass
283
OCS­
G
13662
Platform
Name:
A
CWIS
Information
Requirements
Platform
Information
Number
of
CWISs
2
Brief
description
of
each
CWIS
(
e.
g.,
sea
chest,
simple
pipe)
Simple
pipe
Rough
dimensions
of
each
CWIS
and
indicate
whether
CWIS
has
existing
flange
10"
diameter
pipe
extending
to
 
111'
below
surface
of
GOM.
Has
a
flange.
Screen
type
(
e.
g.,
strainer,
wedge
wire)
with
mesh
size
Strainer­
mesh
size
unknown
Total
daily
maximum
design
water
intake
volume
of
each
CWIS
5,760,000
gallons
per
day
Total
daily
water
intake
volume
of
each
CWIS
(
set­
up/
drilling)
2,880,000
gallons
per
day
Total
daily
cooling
water
intake
volume
of
each
CWIS
(
set­
up/
drilling)
2,880,000
gallons
per
day
Design
through
screen
velocity
of
each
CWIS
(
i.
e.,
Q
=
V
*
A)
(
set­
up/
drilling)
Unknown
List
purposes
of
cooling
water
intake
(
e.
g.,
cool
crude
oil,
produced
water,
power
generators,
drill
pipe
brakes).
Cools
gas
compressor
and
crude
oil.

List
purposes
of
cooling
water
intake
(
e.
g.,
cool
crude
oil,
produced
water,
power
generators,
drill
pipe
brakes).
List
purposes
of
non­
cooling
water
intakes
(
e.
g.,
fire
water,
hotel
loads)
other
than
ballast
water.
Fire
water
Total
volume
of
water
intake
for
ballasting,
duration
of
ballast
intake,
and
through
screen
velocity
of
ballast
intake.
NA
Mitigation
measures
for
reducing
impingement
and
entrainment
of
aquatic
organisms,
and
biofouling
prevention
measures.
Strainer
Mitigation
measures
for
reducing
exotic
species
migration
through
ballast
water.
NA
CWIS
=
Cooling
Water
Intake
Structure
OCS
Platform
CWIS
Information
Company:
ExxonMobil
Production
Company
Prospect
or
Field
Name:
Mississippi
Canyon
281
OCS
Lease
and
Block:
Mississippi
Canyon
280
OCS­
G
3818
Platform
Name:
A
CWIS
Information
Requirements
Platform
Information
Number
of
CWISs
2
Brief
description
of
each
CWIS
(
e.
g.,
sea
chest,
simple
pipe)
Simple
pipe
Rough
dimensions
of
each
CWIS
and
indicate
whether
CWIS
has
existing
flange
10"
diameter
extending
to
 
30'
below
surface
of
GOM.
No
flange.
Screen
type
(
e.
g.,
strainer,
wedge
wire)
with
mesh
size
½
"
mesh
screen
at
pump
intakes
Total
daily
maximum
design
water
intake
volume
of
each
CWIS
2,300,000
gallons/
day
Total
daily
water
intake
volume
of
each
CWIS
(
set­
up/
drilling)
2,300,000
gallons/
day
Total
daily
cooling
water
intake
volume
of
each
CWIS
(
set­
up/
drilling)
100%

Design
through
screen
velocity
of
each
CWIS
(
i.
e.,
Q
=
V
*
A)
(
set­
up/
drilling)
6.5
ft/
sec
List
purposes
of
cooling
water
intake
(
e.
g.,
cool
crude
oil,
produced
water,
power
generators,
drill
pipe
brakes).
Cools
Norkool
which
is
used
to
cool
compressors,
generators,
and
pump.

List
purposes
of
cooling
water
intake
(
e.
g.,
cool
crude
oil,
produced
water,
power
generators,
drill
pipe
brakes).
List
purposes
of
non­
cooling
water
intakes
(
e.
g.,
fire
water,
hotel
loads)
other
than
ballast
water.
Fire
water
Total
volume
of
water
intake
for
ballasting,
duration
of
ballast
intake,
and
through
screen
velocity
of
ballast
intake.
NA
Mitigation
measures
for
reducing
impingement
and
entrainment
of
aquatic
organisms,
and
biofouling
prevention
measures.
½
"
mesh
screen
Mitigation
measures
for
reducing
exotic
species
migration
through
ballast
water.
None
CWIS
=
Cooling
Water
Intake
Structure
OCS
Platform
CWIS
Information
Company:
ExxonMobil
Production
Company
Prospect
or
Field
Name:
South
Pass
89
OCS
Lease
and
Block:
South
Pass
98
OCS­
G
1619
Platform
Name:
B
CWIS
Information
Requirements
Platform
Information
Number
of
CWISs
2
Brief
description
of
each
CWIS
(
e.
g.,
sea
chest,
simple
pipe)
Simple
pipe
Rough
dimensions
of
each
CWIS
and
indicate
whether
CWIS
has
existing
flange
10"
diameter
extending
to
 
95'
below
surface
of
GOM.
No
flange.
Screen
type
(
e.
g.,
strainer,
wedge
wire)
with
mesh
size
1/
8"
V­
shaped
mesh
screen
Total
daily
maximum
design
water
intake
volume
of
each
CWIS
2,300,000
gallons/
day
Total
daily
water
intake
volume
of
each
CWIS
(
set­
up/
drilling)
2,300,000
gallons/
day
Total
daily
cooling
water
intake
volume
of
each
CWIS
(
set­
up/
drilling)
2,300,000
gallons/
day
Design
through
screen
velocity
of
each
CWIS
(
i.
e.,
Q
=
V
*
A)
(
set­
up/
drilling)
10.2
ft/
sec
List
purposes
of
cooling
water
intake
(
e.
g.,
cool
crude
oil,
produced
water,
power
generators,
drill
pipe
brakes).
Cools
Norkool
which
is
used
to
cool
compressors,
generators,
and
pump.

List
purposes
of
cooling
water
intake
(
e.
g.,
cool
crude
oil,
produced
water,
power
generators,
drill
pipe
brakes).
List
purposes
of
non­
cooling
water
intakes
(
e.
g.,
fire
water,
hotel
loads)
other
than
ballast
water.
Fire
water,
toilets
Total
volume
of
water
intake
for
ballasting,
duration
of
ballast
intake,
and
through
screen
velocity
of
ballast
intake.
NA
Mitigation
measures
for
reducing
impingement
and
entrainment
of
aquatic
organisms,
and
biofouling
prevention
measures.
1/
8"
mesh
screen
Mitigation
measures
for
reducing
exotic
species
migration
through
ballast
water.
None
CWIS
=
Cooling
Water
Intake
Structure