TELEPHONE
CALL
RECORD
Project:
CWA
316(
b)
Phase
III
Rule
for
Oil
and
Gas
Extraction
Facilities
Date:
18
May
2004
Name:
Mark
Briggs,
ERG
Contact
Name:
Linda
Cook
Johnson
Screens
New
Brighton,
MN
651­
636­
3900
Subject:
Screen
Design
for
Cooling
Water
Intake
Structures
on
Oil
and
Gas
Extraction
Facilities
I
spoke
with
Linda
Cook,
product
specialist
in
Johnson
Screens
CWIS
group,
regarding
the
CWA
316(
b)
Phase
III
Rule
for
Oil
and
Gas
Extraction
facilities.
Linda
was
well
aware
of
the
proposed
rule
and
stated
that
Johnson
Screens
had
developed
an
informational
packet
for
prospective
customers
regarding
the
regulation
the
application
of
Johnson
Screens
to
prevent
both
impingement
and
entrainment
of
marine
life.
Linda
stated
she
would
email
me
the
file
on
the
316(
b)
rule
Johnson
Screens
has
developed.

Linda
stated
that
Johnson
Screens
manufactures
a
cylindrical
wedge
wire
screen
designed
to
fit
over
existing
pipes
and
caissons
to
prevent
both
impingement
and
entrainment.
The
screens
are
designed
to
provide
a
flow
velocity
of
less
than
0.5
feet
per
second
(
fts)
and
the
screen
opening
is
sized
to
prevent
entrainment
of
the
smallest
marine
organism
located
within
the
vicinity
of
the
CWIS
opening.
Linda
stated
she
would
email
me
product
literature
on
the
cylindrical
wedge
wire
screens
that
Johnson
Screens
manufactures
for
CWIS.
Linda
also
stated
she
would
be
happy
to
answer
any
additional
questions
we
may
have
regarding
their
product.

Mark
TELEPHONE
CALL
RECORD
Project:
CWA
316(
b)
Phase
III
Rule
for
Oil
and
Gas
Extraction
Facilities
Date:
12
May
2004
Name:
Joy
Abel,
ERG
Contact
Name:
Mark
Watson
Johnson
Screens
Wytheville,
VA
(
508)
864­
4093
Subject:
Screen
Design
for
Cooling
Water
Intake
Structures
on
Oil
and
Gas
Extraction
Facilities
I
spoke
with
Mark
Watson
regarding
design
information
on
Johnson
Screens
Products
for
cooling
water
intake
structures.
The
following
are
the
questions
and
answers:

1.
Do
flat
panel
wedge
wire
screens
have
entrainment
reduction
properties?
Mark's
Answer:
Entrainment
reduction
is
not
inherent
with
a
flat
screen.
Flat
screens
do
not
distribute
the
flow
evenly
across
the
screen.
Mark
thought
that
these
screens
could
be
designed
to
distribute
the
flow
evenly
with
proper
baffling.

2.
Can
cylindrical
wedge
wire
screens
be
installed
onto
caissons,
sea
chests,
and
submersible
pump
intakes?
Mark's
Answer:
Mark
was
not
familiar
with
caissons
or
sea
chests.
He
said
that
cylindrical
wedge
wire
screens
can
be
installed
as
long
as
there
is
enough
clearance
and
it
can
be
attached.
There
must
be
at
leas
½
inch
diameter
clearance
around
the
screen.
There
typically
needs
to
be
a
flange
to
bolt
on
this
screen.
Based
on
my
description
of
the
caisson,
he
thought
this
screen
would
work
on
a
caisson.
He
did
not
know
if
the
screen
would
work
on
a
sea
chest
because
it
would
create
extra
drag.
He
said
mechanically,
he
does
not
see
why
it
would
not
work.

Joy
