Document ID: EPA-HQ-OW-2002-0019-0081
Agency: epa
Document Type: Supporting & Related Material
Title: 
Posted Date: 2003-10-17T04:00Z

Results
of
the
Monte
Carlo
Analysis
for
Application
of
Biosolids
to
Agricultural
Land
­

Fixed
Sample
at
1000
ppt
TEQ
Table
1
through
Table
10
presents
a
summary
of
the
risk
results
for
the
adult
and
child
farmer
receptors
evaluated
by
the
Monte
Carlo
analysis
using
the
median
sample
concentration
from
the
2001
National
Sewage
Sludge
Survey
(
NSSS)
scaled
to
be
1000
ppt.
The
Monte
Carlo
results
are
presented
for
the
50th,
the
75th,
the
90th,
and
the
95th
percentiles
from
the
distribution
of
risk
for
each
pathway.
For
the
application
to
agricultural
land
scenario
the
receptor
of
concern
is
a
farmer
who
applies
biosolids
to
his
crops
and
pasture.
The
pathways
considered
in
this
scenario
are
the
ingestion
of
soil,
above­
ground
produce,
root
vegetable,
beef,
milk,
poultry,
egg,
and
fish,
and
inhalation
of
ambient
air
and
breastmilk
ingestion
by
the
infant.
The
risk
percentiles
for
each
pathway
were
selected
independently
and
do
not
necessarily
correspond
to
the
same
inputs
(
i.
e.,
the
90th
percentile
risk
for
the
above
ground
vegetable
ingestion
may
not
be
the
risk
from
vegetable
ingestion
used
to
calculate
the
90th
percentile
total
risk).
These
tables
show
that
the
driving
pathways
for
risk
from
the
use
of
biosolids
on
agricultural
fields
are
the
beef
and
milk
pathways.
These
pathways
show
risks
at
least
an
order
of
magnitude
higher
than
any
other
pathway.
The
risks
in
these
tables
are
calculated
using
the
Cancer
Slope
Factor
for
TCDD
of
1.56
x
105
(
mg/
kg­
d)­
1.
If
a
new
different
slope
factor
is
used
the
results
can
be
scaled
accordingly.

Table
1.
Percentile
Risk
for
Soil
Ingestion
Pathway
Percentile
Lifetime
Individual
Risk
Adult
Child
50th
3E­
7
8E­
7
75th
9E­
7
1E­
6
90th
2E­
6
2E­
6
95th
3E­
6
3E­
6
Table
2
Percentile
Risk
for
Exposed
Produce
Ingestion
Pathway
Percentile
Lifetime
Individual
Risk
Adult
Child
50th
5E­
8
3E­
8
75th
2E­
7
8E­
8
90th
5E­
7
2E­
7
95th
9E­
7
3E­
7
Table
3
Percentile
Risk
for
Belowground
Vegetable
Ingestion
Pathway
Percentile
Lifetime
Individual
Risk
Adult
Child
50th
8E­
7
5E­
7
75th
3E­
6
2E­
6
90th
8E­
6
4E­
6
95th
1E­
5
6E­
6
Table
4.
Percentile
Risk
for
Poultry
Ingestion
Pathway
Percentile
Lifetime
Individual
Risk
Adult
Child
50th
1E­
6
2E­
6
75th
5E­
6
3E­
6
90th
1E­
5
6E­
6
95th
2E­
5
8E­
6
Table
5.
Percentile
Risk
for
Egg
Ingestion
Pathway
Percentile
Lifetime
Individual
Risk
Adult
Child
50th
2E­
6
2E­
6
75th
5E­
6
3E­
6
90th
1E­
5
6E­
6
95th
2E­
5
9E­
6
Table
6.
Percentile
Risk
for
Beef
Ingestion
Pathway
Percentile
Lifetime
Individual
Risk
Adult
Child
50th
3E­
5
3E­
5
75th
9E­
5
6E­
5
90th
2E­
4
1E­
4
95th
4E­
4
2E­
4
Table
7.
Percentile
Risk
for
Milk
Ingestion
Pathway
Percentile
Lifetime
Individual
Risk
Adult
Child
50th
2E­
5
3E­
5
75th
6E­
5
6E­
5
90th
1E­
4
1E­
4
95th
2E­
4
2E­
4
Table
7­
8.
Percentile
Risk
for
Fish
Ingestion
Pathway
Percentile
Lifetime
Individual
Risk
Adult
50th
3E­
8
75th
2E­
7
90th
6E­
7
95th
1E­
6
Table
9.
Percentile
Risk
for
Air
Inhalation
Pathway
Percentile
Lifetime
Individual
Risk
Adult
Child
50th
3E­
8
4E­
8
75th
1E­
7
9E­
8
90th
2E­
7
2E­
7
95th
3E­
7
2E­
7
Table
10.
Percentile
Risk
for
Breast
Milk
Ingestion
Pathway
Percentile
Lifetime
Individual
Risk
Infant
50th
9E­
8
75th
2E­
7
90th
3E­
7
95th
4E­
7
Table
11.
Percentile
Risk
for
Farm
Family
for
All
Pathways
Percentile
Lifetime
Individual
Risk
Adult
Child
50th
7E­
5
7E­
5
75th
2E­
4
1E­
4
90th
4E­
4
3E­
4
95th
6E­
4
4E­
4
The
sample
from
Episode
6400
was
used
to
scale
to
1000
ppt.
This
is
the
median
sample
and
was
chosen
to
be
scaled
from
its
original
concentration
to
represent
1000
TEQ.
These
calculations
are
shown
in
the
following
table
Calculation
of
Waste
Concentration
Representing
1000
TEQ
(
Episode
6400)

CAS
Chem
WasteConc.
Used
in
Modeling
(
ppt)
Original
Waste
Conc.
(
ppt)
TEF
Original
TEQ
Conc.
(
ppt)
Final
TEQ
Conc.

1746016
TCDD,
2,3,7,8­
45.6553725
1.1
1
1.1
45.655
19408743
HxCDD,
1,2,3,7,8,9­
298.8351654
7.2
0.1
0.72
29.884
31508006
PeCB,
2,3',
4,4',
5­
239068.1323
5760
0.0001
0.576
23.907
32598133
TeCB,
3,3',
4,4'­
13530.59221
326
0.0001
0.0326
1.353
32598144
PeCB,
2,3,3',
4,4'­
97121.42876
2340
0.0001
0.234
9.712
3268879
OCDD,
1,2,3,4,6,7,8,9­
77614.13324
1870
0.0001
0.187
7.761
32774166
HxCB,
3,3',
4,4',
5,5'­
244.8788161
5.9
0.01
0.059
2.449
35822469
HpCDD,
1,2,3,4,6,7,8­
8757.530542
211
0.01
2.11
87.575
39001020
OCDF,
1,2,3,4,6,7,8,9­
11911.90173
287
0.0001
0.0287
1.191
39227286
HxCDD,
1,2,3,4,7,8­
120.3641639
2.9
0.1
0.29
12.036
39635319
HpCB,
2,3,3',
4,4',
5,5'­
2282.768625
55
0.0001
0.0055
0.228
40321764
PeCDD,
1,2,3,7,8­
336.1895611
8.1
1
8.1
336.190
51207319
TCDF,
2,3,7,8­
635.0247265
15.3
0.1
1.53
63.502
52663726
HxCB,
2,3',
4,4',
5,5'­
12326.95057
297
0.0000
1
0.00297
0.123
55673897
HpCDF,
1,2,3,4,7,8,9­
116.2136754
2.8
0.01
0.028
1.162
57117314
PeCDF,
2,3,4,7,8­
78.85927977
1.9
0.5
0.95
39.430
57117416
PeCDF,
1,2,3,7,8­
95.4612334
2.3
0.05
0.115
4.773
57117449
HxCDF,
1,2,3,6,7,8­
136.9661175
3.3
0.1
0.33
13.697
57465288
PeCB,
3,3',
4,4',
5­
1519.078758
36.6
0.1
3.66
151.908
57653857
HxCDD,
1,2,3,6,7,8­
481.4566554
11.6
0.1
1.16
48.146
60851345
HxCDF,
2,3,4,6,7,8­
219.9758857
5.3
0.1
0.53
21.998
65510443
PeCB,
2',
3,4,4',
5­
39346.63011
948
0.0001
0.0948
3.935
67562394
HpCDF,
1,2,3,4,6,7,8­
5146.605627
124
0.01
1.24
51.466
70362504
TeCB,
3,4,4',
5­
3312.08975
79.8
0.0001
0.00798
0.331
70648269
HxCDF,
1,2,3,4,7,8­
145.2670943
3.5
0.1
0.35
14.527
72918219
HxCDF,
1,2,3,7,8,9­
20.75244204
0.5
0.1
0.05
2.075
74472370
PeCB,
2,3,4,4',
5­
6806.80099
164
0.0005
0.082
3.403
38380084
HxCB,
2,3,3',
4,4',
5'­
43165.07945
1040
0.0005
0.52
21.583
Total
TEQ
24.09355
1000