TITLE
V
PERIODIC
MONITORING
GUIDANCE
FINALIZED
The
Environmental
Protection
Agency
(
EPA)
issued
guidance
on
September
15,
1998,
that
clarifies
certain
principles
to
be
applied
when
implementing
the
periodic
monitoring
requirements
of
40
CFR,
sections
70.6(
a)(
3)
and
71.6(
a)(
3).
The
guidance,
developed
with
significant
stakeholder
involvement,
should
assist
State
and
local
permitting
authorities
in
evaluating
whether
sufficient
monitoring
is
contained
in
each
facility's
air
operating
permit.

Under
EPA's
operating
permit
program
(
title
V),
permits
issued
must
include
periodic
monitoring
for
each
emission
point
at
each
source.
This
requirement
has
been
one
of
the
most
challenging
aspects
of
title
V
implementation
because
issues
raised
have
revealed
significantly
different
interpretations
among
permitting
authorities,
EPA,
and
industry.
The
periodic
monitoring
guidance
discusses
in
detail
the
factors
that
should
be
considered
in
assessing
the
adequacy
of
the
periodic
monitoring
and
should
resolve
most
questions
of
interpretation.
In
addition,
by
clarifying
periodic
monitoring
requirements,
EPA
expects
that
the
guidance
will
lead
to
good
permits
which
satisfy
the
Clean
Air
Act
and
its
regulations.

The
guidance
clarifies
the
instances
in
which
periodic
monitoring
is
required.
It
does
not,
however,
contain
specific,
technical
examples
of
periodic
monitoring.
The
Agency
is
developing
a
technical
reference
document
containing
such
examples
that
is
expected
to
be
available
to
the
public
by
Spring
1999.
It
is
likely
that
understanding
of
the
technical
aspects
of
implementing
periodic
monitoring
will
continue
to
evolve
over
time
and
that
the
reference
document
will
be
supplemented
accordingly.
The
guidance
also
clarifies
the
instances
in
which
no
periodic
monitoring
is
required.
In
addition,
the
guidance
confirms
that
top­
down
or
hierarchical
approaches
to
monitoring
selection
are
not
required.

Other
features
of
the
guidance
include
background
on
why
and
when
periodic
monitoring
is
necessary
and
a
description
of
the
monitoring
evaluation
process.
The
guidance
describes
how
periodic
monitoring
can
be
made
enforceable
through
the
title
V
permit
and
discusses
documentation
that
should
accompany
the
permit
record.
It
also
explains
EPA's
role
in
the
periodic
monitoring
evaluation
process
and
where
the
applicant,
the
permitting
authority,
or
public
may
find
more
information
about
the
process.

For
further
information,
interested
parties
can
obtain
an
electronic
copy
of
the
guidance
from
EPA's
operating
permits
program
web
site
at
the
following
address:
http://
www.
epa.
gov/
oar/
oaqps/
permits.
For
questions
concerning
the
guidance
or
specific
periodic
monitoring
adequacy
determinations,
contact
your
State/
local
permitting
authority
or
David
McNeal
(
404­
562­
9102)
or
Joel
Huey
(
404­
562­
9104)
of
EPA
Region
4.
