and between 56 and 920 in 10,000 for high-arsenic copper
smelters) would remain considerably above the EPA estimated
maximum individual lifetime risk of less than 2 in 10,000
from current radionuclide emissions from DOE facilities.
Seetd.
Further, the maximum individual lifetime risk from
current emissions at DOE facilities are roughly equivalent
to those estimated for four sources of inorganic arsenic
that EPA determined should not be regulated (i.e., zinc
oxide plants, between 1.7 and 28 in 10,000; arsenic chemical
manufacturing, between 0.4 and 6.4 in 10,000; cotton gins,
between 0.17 and 2.83; and secondary lead smelters, between
2.0 and 3.2 in 10,000).
Seeid.
The other measure of risk that EPA considers important for
sensible risk management is “total population impact®.
Background Paper, supra.
EPA
This risk estimate which takes
account of all persons exposed provides a measure of the
"overall impact on public health® and is expressed in terms
of the annual number of cancer fatalities.
See id.
The
annual increased total population impact from current
radionuclide emissions from DOE facilities is estimated by
EPA to be about 1 cancer death in 15 years or 0.07 per year.
48 FR 15080 (April 6, 1983).
This is considerably less than
the annual population impact from benzene emissions from the
two benzene sources proposed to be regulated even after the
imposition of the proposed regulations (i.e., 0.14 for
fugitive benzene and .23 for coke by-product recovery