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   hazardous  air pollutants  from  area  sources and  an  equivalent

   reduction in the public health risks associated  with such sources

   including a  reduction  of not  less  than 75  per centum  in  the

   incidence of cancer attributable to emissions from such sources.

      "(2)   Research   program.-The   Administrator   shall,   after

   consultation   with  State   and  local   air  pollution   control

   officials, conduct a program  of research with respect  to sources

   of  hazardous  air pollutants  in urban  areas  and  shall include

   within such program-

         "(A) ambient monitoring for  a broad range of  hazardous air

      pollutants  (including, but  not limited  to,  volatile organic

      compounds,  metals,  pesticides   and  products  of  incomplete

      combustion) in a representative number of urban locations;

         "(B) analysis to  characterize the sources of such pollution

      with a focus  on area  sources and the  contribution that  such

      sources  make  to  public   health  risks  from  hazardous  air

      pollutants; and

         "(C) consideration  of atmospheric  transformation and other

      factors  which  can  elevate  public  health  risks  from  such

      pollutants.  Health effects considered under this program shall

      include,  but not be limited to, carcinogenicity, mutagenicity,

      teratogenicity,  neurotoxicity,  reproductive  dysfunction  and

      other acute  and chronic  effects including  the role  of  such

      pollutants as  precursors of  ozone or acid  aerosol formation.

      The Administrator shall report  the preliminary results of such

      research not later than 3 years after the  date of enactment of

      the Clean Air Act Amendments of 1990.

      "(3) National strategy.-

         "(A)  Considering  information  collected  pursuant  to  the

      monitoring   program   authorized   by   paragraph   (2),   the

      Administrator shall, not later  than 5 years after the  date of

      enactment of the  Clean Air  Act Amendments of  1990 and  after

      notice and opportunity for public comment, prepare and transmit

      to the  Congress a comprehensive strategy  to control emissions

      of hazardous air pollutants from area sources in urban areas.

         "(B) The strategy shall-

           "(i) identify  not less than  30 hazardous air  pollutants

         which, as the result of emissions from area sources, present

         the greatest threat  to public health in the  largest number

         of urban  areas and that are  or will be listed  pursuant to

         subsection (b), and

           "(ii)  identify  the source  categories  or  subcategories

         emitting such pollutants that are or will be listed pursuant

         to  subsection  (c).     When  identifying  categories   and

         subcategories  of  sources   under  this  subparagraph,  the

         Administrator shall  assure that  sources accounting  for 90

         per centum or more of the aggregate emissions of each of the

         30  identified  hazardous  air  pollutants  are  subject  to

         standards pursuant to subsection (d).

         "(C)  The  strategy shall  include  a  schedule  of specific

      actions to  substantially reduce the public  health risks posed

      by  the release of  hazardous air pollutants  from area sources

      that  will  be  implemented  by  the  Administrator  under  the

      authority of this or other laws (including, but not limited to,

      the  Toxic Substances  Control  Act,  the Federal  Insecticide,

      Fungicide and Rodenticide Act and the Resource Con-

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