emissions by electric utility steam generating units of
pollutants listed under subsection (b) after imposition of the
requirements of this Act. The Administrator shall report the
results of this study to the Congress within 3 years after the
date of the enactment of the Clean Air Act Amendments of 1990.
The Administrator shall develop and describe in the
Administrator's report to Congress alternative control
strategies for emissions which may warrant regulation under
this section. The Administrator shall regulate electric
utility steam generating units under this section, if the
Administrator finds such regulation is appropriate and
necessary after considering the results of the study required
by this subparagraph.
"(B) The Administrator shall conduct, and transmit to the
Congress not later than 4 years after the date of enactment of
the Clean Air Act Amendments of 1990, a study of mercury
emissions from electric utility steam generating units,
municipal waste combustion units, and other sources, including
area sources. Such study shall consider the rate and mass of
such emissions, the health and environmental effects of such
emissions, technologies which are available to control such
emissions, and the costs of such technologies.
"(C) The National Institute of Environmental Health Sciences
shall conduct, and transmit to the Congress not later than 3
years after the date of enactment of the Clean Air Act
Amendments of 1990, a study to determine the threshold level of
mercury exposure below which adverse human health effects are
not expected to occur. Such study shall include a threshold
for mercury concentrations in the tissue of fish which may be
consumed (including consumption by sensitive populations)
without adverse effects to public health.
"(2) Coke oven production technology study.-
"(A) The Secretary of the Department of Energy and the
Administrator shall jointly undertake a 6-year study to assess
coke oven production emission control technologies and to
assist in the development and commercialization of technically
practicable and economically viable control technologies which
have the potential to significantly reduce emissions of
hazardous air pollutants from coke oven production facilities.
In identifying control technologies, the Secretary and the
Administrator shall consider the range of existing coke oven
operations and battery design and the availability of sources
of materials for such coke ovens as well as alternatives to
existing coke oven production design.
"(B) The Secretary and the Administrator are authorized to
enter into agreements with persons who propose to develop,
install and operate coke production emission control
technologies which have the potential for significant emissions
reductions of hazardous air pollutants provided that Federal
funds shall not exceed 50 per centum of the cost of any project
assisted pursuant to this paragraph.
"(C) The Secretary shall prepare annual reports to Congress
on the status of the research program and at the completion of
the study shall make recommendations to the Administrator
identifying practicable and economically viable control
technologies for coke oven production facilities to reduce