Document ID: EPA-HQ-OW-2004-0002-0059
Agency: epa
Document Type: Supporting & Related Material
Title: 
Posted Date: 2004-11-23T05:00Z

MEMORANDUM
To:
Phase
III
Record
From:
Elicia
Blumberg,
Tetra
Tech,
Inc.
Date:
1
April
2004
Re:
Exclusion
of
high
flow
Phase
III
facilities,
DMU3250
and
DMU3235
______________________________________________________________________________

At
EPA's
request,
Tetra
Tech
evaluated
the
apportionment
of
intake
water
in
two
extreme
high
flow
facilities,
to
evaluate
usage
as
cooling
water
versus
power
production
in
hydro
stations.
This
memorandum
summarizes
the
results
of
the
evaluation.

DMU3250
This
facility
was
listed
as
having
a
design
intake
flow
(
DIF)
of
6.69
billion
gallons
per
day
(
BGD)
and
average
actual
intake
flow
(
AIF)
of
4.11
BGD.
The
facility
has
4
intake
structures,
Main
Mill,
Anston
Station,
PGW
old
and
PGW
new.
It
reported
cooling
water
use
as
22%
for
the
intake
called
Main
Mill,
and
1%
for
each
of
the
other
3
intakes.
The
Main
Mill
intake
is
significantly
lower
than
the
other
intakes;
nevertheless,
the
original
interpretation
of
the
data
concluded
that
the
cooling
water
usage
by
the
facility
totaled
25%,
rendering
it
in­
scope.
Tetra
Tech
checked
the
PCS
database
and
contacted
the
facility
in
order
to
better
understand
the
reason
for
the
high
intake
flow.
From
this
review,
it
appears
that
the
facility
included
intake
from
hydro
stations
in
its
DIF.
When
Tetra
Tech
spoke
with
the
facility
engineer
in
December
2003,
the
engineer
explained
that
the
facility
has
two
intake
locations,
one
mile
apart,
that
operate
in
tandem.
The
first
locale
takes
in
3500
million
gallons
per
day
(
MGD)
and
the
second
takes
in
3180
MGD,
totaling
the
6.69
BGD
reported
in
the
Phase
III
master
list.
Upon
review
of
the
flows
for
each
intake,
it
appears
that
Anston
Station
(
a
hydro
station)
operates
from
the
first
locale
(
the
one
that
takes
in
3500
MGD),
and
the
other
3
operate
at
the
second
locale
(
as
they
collectively
withdraw
about
3180
MGD).
The
PCS
database
indicates
that
one
of
the
3
intakes
may
also
be
a
hydro
station.
Tetra
Tech
suspects
that
the
intakes
referred
to
as
PGWs
are
both
hydro
stations
(
and
at
least
PGW
new
has
the
flows
in
a
magnitude
indicative
to
support
that).
If
3
of
the
4
intakes
are
indeed
hydro
stations,
then
the
flow
for
that
facility,
not
including
the
hydro
stations,
would
be
approximately
10
MGD.

DMU3235
This
facility
was
listed
as
having
a
DIF
of
5.85
BGD,
and
AIF
of
4.97
BGD.
Tetra
Tech
spoke
with
the
facility
representative
December
2003.
She
explained
that
the
facility
had
5
hydro
stations,
a
mill,
and
2
"
unknown"
intakes
(
totaling
8
intakes).
The
hydro
stations
were
responsible
for
the
majority
of
the
cooling
water
use.
Per
the
facility's
water
balance
diagrams,
Cooling
Water
System
A
is
the
Berlin­
Gorham
Mill
Complex.
Intake
A
withdraws
38.6
MGD,
and
Intake
B
withdraws
3.14
MGD.
Most
of
the
water
appears
to
be
used
for
the
following
processes:
filtration,
pulp
production,
chemical
recovery,
bleaching,
and
treatment.
Cooling
Water
System
B
feeds
the
Riverside
Hydro
Station,
and
has
two
intakes­
CWIS
C
and
D.
Each
CWIS
withdraws
582
MGD
(
totaling
1,164
MGD)
of
which
0.07
MGD
(
total)
is
used
for
non­
contact
cooling.
Cooling
Water
System
C
has
one
intake,
CWIS
E,
which
takes
in
1,160
MGD
to
the
Gorham
Hydro
Station.
Only
0.046
MGD
is
used
for
cooling.
Finally,
Cooling
Water
System
D
has
one
intake,
CWIS
H,
which
withdraws
2,197
MGD
into
the
Gorham
Hydro
Station.
0.017
MGD
is
used
for
cooling.
In
summary,
just
under
42
MGD
serves
the
mill
(
and
it
is
not
clear
from
the
water
balance
diagram
how
much
of
that
is
used
for
cooling).
The
remaining
4.5
BGD
go
to
one
of
two
hydro
stations.