Section 24-145. Emission of particulate matter from refuse burning equipment and fuel burning equipment; weight-rate standard

(a)  No  person  shall  cause  or  permit the emission of particulate matter from refuse burning
  equipment and fuel burning equipment if the emission from such equipment
  is in violation of the provisions of section 24-141 or  24-142  of  this
  code  or  if  the  particulate  matter  emitted  as measured in the flue
  exceeds the following limits:
    (1) In refuse burning  equipment,  the  permissible  particulate  rate
  shall  be  as provided in figure four of section 24-153 of this code. If
  two or more refuse burning units are connected to  a  single  flue,  the
  total  capacity rating of all refuse burning units connected to the flue
  shall be the capacity rating for the purpose of computing the amount  of
  particulate matter which may be emitted. If a single refuse burning unit
  is  manifold  to  two  or  more  flues the capacity rating of the single
  refuse burning unit shall be the capacity  rating  for  the  purpose  of
  computing the amount of particulate matter which may be emitted;
    (2)  In  fuel  burning  equipment  in  which  the preponderance of the
  particulate matter emitted is caused by the burning of fuel, 0.40 pounds
  for each million Btu per hour input if  the  equipment  has  a  capacity
  rating  of  ten  million Btu per hour or less. If the capacity rating of
  the fuel burning equipment is more than ten million Btu  per  hour,  the
  amount  of  permissible  emissions  of  particulate  matter  shall be as
  provided in figure three of section 24-153 of this code, as measured  on
  a dry basis.
    (b)  If two or more fuel burning units are connected to a single flue,
  the total capacity rating of all fuel burning  units  connected  to  the
  flue  shall  be  the  capacity  rating  for the purpose of computing the
  amount of particulate matter which may be  emitted.  If  a  single  fuel
  burning unit is manifold to two or more flues the capacity rating of the
  single fuel burning unit shall be the capacity rating for the purpose of
  computing the amount of particulate matter which may be emitted.