Section 24-144. Emission of air contaminant; sulfur compounds; volume standard

No  person  shall  cause  or  permit  the  emission  of  air  contaminant:  (a)  from equipment used in a manufacturing process if the
  air  contaminant  emitted  as  measured  in  the  flue  contains  sulfur
  compounds  of  more  than  five  hundred  parts per million of undiluted
  process emissions;
    (b) from a boiler with a capacity of five hundred million Btu per hour
  or  more  and  completed  after  August  twentieth,   nineteen   hundred
  seventy-one, if the air contaminant emitted has a sulfur dioxide content
  of  more  than  one  hundred  parts  per  million by volume of undiluted
  emissions measured at ten percent excess air;
    (c) from a boiler with a capacity of five hundred million Btu per hour
  or  more  and  completed  before  August  twentieth,  nineteen   hundred
  seventy-one, if the air contaminant emitted has a sulfur dioxide content
  of  more  than  two  hundred  parts  per  million by volume of undiluted
  emissions measured at ten percent excess air.