1CFR
Parts
420,
437,
and
438
DCN
300­
013
SUBJ:
HEM
Final
Limitations
for
Poultry
Subcategory
(
Subcategory
K)
­
Existing
Sources
FROM:
Shari
Barash
TO:
MPP
Project
Record
DATE:
February
24,
2004
Consistent
with
other
recently
promulgated
or
amended
effluent
guidelines
limitations
and
standards
for
other
point
source
categories,
1
EPA
excluded
all
self­
monitoring
oil
and
grease
data
analyzed
with
methods
that
require
freon,
an
ozone­
depleting
agent,
as
an
extraction
solvent.
EPA
is
phasing
out
these
freon­
based
methods
and
has
approved
a
replacement
method,
Method
1664,
which
measures
hexane
extractable
materials
(
HEM).
EPA
has
concluded
that
the
freon
based
methods
are
unlikely
to
produce
comparable
results
to
Method
1664.

As
explained
in
DCN
300­
011,
EPA
selected
Episode
307a
as
the
model
facility
for
the
BOD
5
and
TSS
parameter
limitations
in
the
Poultry
Subcategory.
EPA
is
unable
to
base
the
HEM
limitations
on
data
from
Episode
307a
because
EPA's
database
does
not
contain
any
HEM
data
for
Facility
307a.

Thus,
to
develop
the
final
limitations
and
standards
for
HEM,
as
was
done
for
BOD
5
and
TSS,
for
the
Poultry
Subcategory,
EPA
first
determined
the
median
HEM
effluent
concentrations
of
all
of
the
poultry
facilities
in
its
database
that
utilize
Option
2
or
Option
2.5
technologies.
In
response
to
comments,
EPA
eliminated
all
Option
2
and
Option
2.5
facilities
with
a
filter
or
chemical
phosphorus
removal
from
the
analysis.
The
Option
2
and
Option
2.5
technologies
are
the
same
except
that
Option
2.5
also
includes
partial
denitrification.
However,
EPA
found
that
no
Option
2
facilities
had
any
HEM
data,
so
was
left
with
only
Option
2.5
facilities.
Since
EPA
has
no
basis
to
conclude
that
this
additional
step
would
have
any
effect
on
the
HEM
effluent
concentrations,
EPA
concluded
that
it
is
appropriate
to
transfer
the
HEM
limitations
for
the
Poultry
Subcategory
from
Option
2.5.
Table
1
provides
information
on
the
facilities
and
HEM
effluent
discharges
used
to
calculate
the
median
HEM
effluent
concentrations.
Based
on
comments
that
EPA
should
use
all
of
the
data
available
to
it,
EPA
used
its
full
effluent
database
for
Option
2
and
2.5
facilities
(
i.
e.,
including
data
from
facilities
that
only
provided
data
reported
as
summarized
monthly
averages
)
to
calculate
the
HEM
LTAs
and
limitations
for
the
final
rule.
This
ensures
that
facilities
operating
the
selected
technology
would
be
able
to
achieve
the
limitations
and
standards
of
the
final
rule.
Table
1:
Data
Used
to
Establish
HEM
Limitations
in
the
Poultry
Subcategorya
Episode
Number
LTA,
mg/
L
1­
Day
VF
4­
Day
VF
Daily
Max
Limit,
mg/
L
Monthly
Average
Limit,
mg/
L
11
5.75
1.93
1.23
26
6.21
2.51
1.37
32
6.13
2.12
1.29
6448
5.93
b
b
312
c
c
c
Final
Limitation
6.03
2.19
1.30
13.2
7.8
aValues
include
autocorrelation
and
were
determined
using
the
methods
described
in
Chapter
14
of
the
final
Technical
Development
Document.
bEPA
is
unable
to
calculate
variability
factors
for
data
sets
that
contain
only
a
single
non­
censored
value
(
See
Chapter
14
of
the
final
Technical
Development
Document
for
more
details).
cAlthough
this
facility
provided
EPA
with
some
summary
effluent
data,
the
data
included
boiler
blowdown
wastewater
and
is
therefore
not
representative
of
poultry
process
wastewaters
alone.

The
final
limitation
LTA
is
the
median
of
the
four
facilities
with
usable
data,
while
the
final
Vfs
are
the
means
of
the
3
facilities
with
usable
data.
This
is
consistent
with
EPAs
approach
in
past
effluent
guidelines.
