CALCULATION
SHEET
SIGNATURE
Arash
Hooshangi
DATE
04/
13/
04
CHECKED
_____________________________________
DATE_________

PROJECT
304(
m)
Biennial
Plan
2004/
2005:
Petroleum
Refining
Industry
Detailed
Study
CALC
NO._____________

SUBJECT
Toxic
Equivalents
for
Dioxins
Reported
in
2000
to
TRI
FILENAME
Q:\
304m\
Updated
TRI
and
PCS
Databases\
Petroleum
Refining\
Petroleum
Refining.
mdb
This
document
outlines
the
steps
taken
to
calculate
toxic
equivalents
(
TEQ)
for
dioxin
discharges
reported
to
the
2000
TRI.
For
risk
assessment
purposes,
toxicity
equivalency
factors
(
TEFs)
for
dioxin
congeners
were
developed,
with
the
TEF
of
2,3,7,8­
TCDD
equal
to
1.0
(
WHO/
97,
see
attached
reference).
The
dioxin
and
dioxin­
like
compound
category
in
TRI
consists
of
17
individual
chemicals
(
congeners).
The
TEFs
for
the
17
dioxin
congeners
in
the
TRI
category
are
listed
in
the
Dioxin_
TEF
table
of
the
MS
Access
database.

1.
Calculation
of
TEQ
for
TRI
Discharges
where
the
Facility
Reported
Dioxin
Distribution.

Query
132b:
a.
Identifies
refineries
that
report
dioxin
congener
distributions
and
also
report
dioxin
discharges
to
wastewater
(
or
POTWs).
b.
Multiplies
total
dioxin
discharge
for
facility
by
individual
congener
distributions
and
TEFs
to
calculate
the
congener
TEQ.
c.
Sums
the
TEQ
result
for
all
17
congeners
to
arrive
at
a
total
TEQ
for
facility
dioxin
discharges.

2.
Calculation
of
TEQ
for
TRI
Discharges
where
the
Facility
Did
Not
Report
Dioxin
Distribution.

Query
133:
Calculates
the
average
congener
distribution
reported
to
TRI
by
petroleum
refineries.

Query
134b:
a.
Identifies
refineries
that
report
dioxin
discharges
to
wastewater
(
or
POTWs)
but
do
not
report
congener
distributions.
b.
Multiplies
total
dioxin
discharge
for
facility
by
average
congener
distributions
(
Query
133)
and
TEFs
to
calculate
the
congener
TEQ.
c.
Sums
the
TEQ
result
for
all
17
congeners
to
arrive
at
a
total
TEQ
for
facility
dioxin
discharges.

3.
Query
135b:
combines
the
above
two
queries
(
132b
and
134b).

4.
Result
The
complete
list
of
petroleum
refining
dioxin
TEQs
(
in
lbs
and
grams)
is
presented
in
the
following
spreadsheet:
Q:\
304m\
Petroleum
Refining\
Reports
and
Memos\
Dioxin
TEQ\
TRI
TEQ
QA/
QC
First,
please
check
the
Dioxin_
TEF
table
to
ensure
correct
TEF
values
are
entered
for
dioxin
congeners.
Second,
please
check
the
queries
(
132b,
133,
134b,
and
135b)
to
ensure
that
TEQ
calculations
are
correct.
CALCULATION
SHEET
SIGNATURE
Arash
Hooshangi
DATE
04/
13/
04
CHECKED
_____________________________________
DATE_________

PROJECT
304(
m)
Biennial
Plan
2004/
2005:
Petroleum
Refining
Industry
Detailed
Study
CALC
NO._____________

SUBJECT
Toxic
Equivalents
for
Dioxins
Reported
in
2000
to
TRI
FILENAME
Q:\
304m\
Updated
TRI
and
PCS
Databases\
Petroleum
Refining\
Petroleum
Refining.
mdb
Sample
Calculations
Dioxin
1:
1,2,3,4,5,7,8­
Heptachlorodibenzofuran,
TEF=
0.01
Facility:
98221SHLLLWESTM
(
reported
dioxin
distribution)
Dioxin
1
distribution
=
15.9
%
Total
dioxin
loads:
0.01146392
lbs
Dioxin
1
TEQ=
TEF
*
distribution
*
total
dioxin
load
=
0.01
*
15.9%
*
0.01146392
=
1.823E­
05
TEQ
Facility:
59101CNCBL401SO
(
did
not
report
dioxin
distribution)
Total
dioxin
load:
0.0003561752
lbs
Dioxin
1
average
distribution
=
16.93
%
Dioxin
1
TEQ=
TEF
*
average
distribution
*
total
dioxin
load
=
0.01
*
16.93%*
0.0003561752
=
6.03E­
07
TEQ
