(Adopted: December 3, 1976)

                                       Rule 904
                       Standard of Performance for Incinerators

          (a)  Definitions

               (1)  DAY means 24 hours.

               (2)  INCINERATOR  means  any  furnace used in the process of
                    burning solid waste for the  purpose  of  reducing  the
                    volume of the waste by removing combustible matter.

               (3)  SOLID WASTE means refuse, more than 50 percent of which
                    is  municipal  type  waste  consisting  of a mixture of
                    paper,   wood,  yard  wastes,  food  wastes,  plastics,
                    leather,   rubber,    and   other   combustibles,   and
                    noncombustible materials such as glass and rock.

          (b)  Emission Standard

               This   rule  applies  to  solid  waste   incinerators,   the
               construction,   modification   or  reconstruction  of  which
               commenced after August 17, 1971,  of  more  than 50 tons per
               day charging rate.

               On and after the date on which the performance test required
               to be conducted by Rule 902 (b)(1) is completed, no owner or
               operator of a solid waste incinerator subject  to  this rule
               shall  cause to be discharged into the atmosphere any  gases
               which contain particulate matter in excess of 0.18 grams per
               dry standard cubic meter (0.08 grains per dry standard cubic
               foot) corrected to 12 percent carbon dioxide (CO2).

          (c)  Monitoring

               The owner  or  operator  of  any  incinerator subject to the
               provisions  of  this rule shall record  the  daily  charging
               rates and hours of operation.

          (d)  Testing Procedure

               Emissions shall be tested according to the methods specified
               by the Air Pollution Control Officer.