Document ID: EPA-HQ-OW-2003-0074-0405
Agency: epa
Document Type: Supporting & Related Material
Title: 
Posted Date: 2003-12-24T05:00Z

304(
m)
Phase
I
Priority
Point
Source
Categories:
PCS
Facilities
on
303(
d)
Impaired
Waters
Due
to
data
limitations
the
actual
number
of
PCS
facilities
discharging
to
impaired
waters
is
unkown.
Moreover,
upstream
facilities
(
and
non­
point
sources)

are
not
included
in
the
impaired
waters
analysis.
Sorted
by:

Impairment
information
is
based
on
a
combination
of
data
from
the
1998
and
2000
reporting
cylces.
There
are
a
total
of
22,347
impaired
waterbodies
in
the
303(
d)
data
base:

19,624
for
1998
and
2,723
for
2000.
Total
Facilities
in
Economic
Census
Total
Facilities
in
PCS1
Facilities
with
PCS
Loading
Estimates2
Facilities
Indexed
to
Receiving
Waters3
Indexed
Facilities
on
Impaired
Waters4
Percent
of
Indexed
Facilities
on
Impaired
Waters
Majors
Majors
Indexed
to
Receiving
Waters
Indexed
Majors
on
Impaired
Waters
Petroleum
Bulk
Stations
and
Terminals:
SIC
5171
9,104
1,840
8
1,147
221
19%
7
5
4
Organic
Chemicals,
Plastics,
&
Synthetic
Fibers:

SICs
2821,
2823,
2824,
2865,
2869
1,581
752
242
578
205
35%
238
232
100
Inorganic
Chemicals:
SICs
2812,
2813,
2816,
2819
1,402
506
97
406
146
36%
95
95
42
Nonferrous
Metals
Manufacturing:
SIC
3331,
3334,

3339,
3341,
3399
580
431
114
357
124
35%
114
114
47
Petroleum
Refining:
SIC
2911
244
252
116
195
68
35%
115
108
39
Oil
and
Gas
Extraction,
Coal
Bed
Methane
Subcategory:
SIC
1311
7,784
6,985
6
141
25
18%
14
6
3
1Under
Counting
of
Facilities
Because
of
Missing
SICs:
26
percent
of
PCS
facilities
(
45,000
of
168,517)
are
excluded
from
the
impaired
waters
analysis
because
they
do
not
have
SICs
in
PCS.

2Under
Estimating
of
Facility
Loads:
Both
concentration
and
discharge
flow
information
is
required
to
calculate
load
estimates
for
PCS
facilities.

Consequently,
load
estimates
have
been
calcuated
primarily
for
majors
because
most
minors
do
not
have
flow
information
in
PCS.

3Undercounting
of
Facilities
Because
They
are
not
Indexed
to
Reaches:
77
percent
of
PCS
facilities
are
excluded
from
impaired
waters
analysis
because
they
have
not
been
indexed
to
reaches,
including
5
percent
of
majors
(
340
of
6,833)
and
80
percent
of
minors
(
129,350
of
161,684).
74,480
PCS
facilities
have
been
indexed
to
the
National
Hydrography
Data
Set
(
NHD)
reaches.
There
are
a
total
of
22,347
impaired
waters
based
on
some
3
million
NHD
reaches.

4Facilities
that
discharge
to
impaired
waters,
where
at
least
one
pollutant
discharged
is
the
same
as
at
least
one
of
the
pollutants
identified
as
a
cause
of
impairment.
Nationally,
9,741
indexed
PCS
facilities
(
1,928
majors
and
7,813
minors)
have
been
matched
to
3,493
impaired
waters.

PCS
Limits
were
used
to
assign
major
facilties
to
impaired
waters.
Typical
Pollutant
Concentrations
(
TPC)
­
average
pollutant
discharge
concentrations
by
SIC
­
were
used
to
assign
minors
to
impaired
waters,
because
minors
have
little
or
no
limit
information
in
PCS.
Over
counting
may
occur
when
matches
are
based
on
TPC:
some
facilities
might
not
actually
discharge
some
or
all
of
the
TPC
assigned
pollutants.
Under
counting
may
occur
when
matches
are
based
on
PCS
Limits:
Facilities
might
discharge
pollutants
for
which
there
are
no
limits
in
their
permits.
Draft:
July
25,
2003
;
Draft:
July
25,
2003
)
is
s
Draft:
July
25,
2003