Document ID: EPA-HQ-OW-2004-0002-0633
Agency: epa
Document Type: Supporting & Related Material
Title: 
Posted Date: 2004-11-30T05:00Z

QUESTIONS
YOUR
RESPONSE
1.
Number
of
CWISs:
4
(
source
water
pumps)

2.
Brief
description
of
each
CWIS
(
e.
g.,
sea
chest,
simple
pipe):
Simple
pipe
(
J­
tube)

3.
Rough
dimensions
of
each
CWIS
and
indicate
whether
CWIS
has
existing
flange:
2
are
12
inch
and
2
are
16
inch,
flanged
4.
Screen
type
(
e.
g.,
strainer,
wedge
wire)
with
mesh
size:
None
but
there
ia
a
screen
at
the
pumps.

5.
Total
daily
maximum
design
water
intake
volumn
of
each
CWIS:
1800
GPM
per
CWIS
(
61714
BPD).
Typically
run
three
of
four.

6.
Total
daily
water
intake
volume
of
each
CWIS
(
set­
up/
drilling):
1800
GPM
(
not
sure
on
actual)

7.
Total
daily
cooling
water
intake
volume
of
each
CWIS
(
set­
up/
drilling):
Almost
all
water
is
used
for
cooling
(
assume
100%)

8.
Design
through
screen
velocity
of
each
CWIS
(
i.
e.,
Q=
V*
A)
(
set­
up/
drilling):
Velocity
through
12
inch
=
5.1
ft/
sec,
Velocity
through
16
inch
=
2.9
ft/
sec.

9.
List
purposes
of
cooling
water
intake
(
e.
g.,
cool
crude
oil,
produced
water,
power
generators,
drill
pipe
brakes):
Fuel
burning
equipment
(
gas
compressor
lube
oil,
scavenger
air,
lift
gas,
drilling
engine
oil
when
drilling)

10.
List
purposes
of
non­
cooling
water
intakes
(
e.
g.,
fire,
water,
hotel
loads)
other
than
ballast
water:
Waterflood,
firewater
11.
Total
volume
of
water
intake
for
ballasting,
duration
of
ballast
intake,
and
through
screen
velocity
of
ballast
intake:
NA
12.
Describe
mitigation
measures
used
for
reducing
impingement
and
entrainment
of
aquatic
organisms
(
e.
g.,
sea
chest
screens,
strainers):
None
13.
Describe
measures
used
to
reduce
or
prevent
biofouling:
None
14.
Describe
mitigation
measures
used
for
reducing
exotic
species
migration
through
ballast
water:
NA
OCS
Lease
and
Block:
Platform
Name:
Dolly
Varden
Platform
COOLING
WATER
INTAKE
STRUCTURE
(
CWIS)
INFORMATION
The
following
questions
apply
to
cooling
water
intake
structure(
s)
at
oil
and
gas
extraction
facility.
If
you
own
more
than
one
facilty,
please
copy
the
questions
and
answer
separately
for
each
facility.

Prospect
or
Field
Name:
Company:
Unocal