MENDOCINO COUNTY AIR QUALITY MANAGEMENT DISTRICT

RULE 4-400 - CONTROL MEASURE FOR EMISSIONS OF DIOXINS FROM MEDICAL WASTE INCINERATORS

  1. No person shall dispose of medical wastes by burning except in a medical waste incinerator which meets the requirements of this regulation, and which has been reviewed by the air pollution control officer and received a written permit to operate in accordance with this and other regulations of the District.
  2. No person shall operate a category III medical waste incinerator unless either condition (1) or (2) is met:.
    1. Emissions to the atmosphere of dioxins are less than 1 percent of the uncontrolled emissions of dioxins; or
    2. Emissions of dioxins are less than 10 nanograms per kilogram of waste burned.
  3. No person shall operate a category III medical waste incinerator unless control equipment is installed and used in a manner which has been demonstrated to and approved by the Air Pollution Control Officer to meet all of the following conditions, (1) through (4):
  1. The temperature of the flue gas at the outlet of the control equipment shall not exceed 300 degrees Fahrenheit, unless it has been demonstrated to and approved in writing by the Air Pollution Control Officer and the ARB that lower emission rates are achieved at a higher outlet temperature; and
  2. The operating temperature of any single-chamber incinerator shall be maintained at not less than 1800 degrees Fahrenheit.
  3. The temperature of the primary combustion chamber of any multiple-chamber incinerator shall be maintained at not less than 1400 degrees Fahrenheit, and the temperature of the secondary combustion chamber shall be maintained at not less than 1800 degrees Fahrenheit.
  4. The design of any incinerator shall provide that the residence time of the combustion gases in the combustion chamber of a single-chamber incinerator or in the secondary combustion chamber of a multiple-chamber incinerator shall be at least one second. Residence time shall be calculated using Equation 1.

      where:
      V = is the volume, expressed in cubic feet, of that portion of the incinerator from the point where the maximum temperature has been reached to the point where the temperature has dropped to 1600 degrees Fahrenheit.

      Qc =  is the flow rate of combustion gas through the combustion chamber, expressed in actual cubic feet per second, and determined using ARB Test Method 2, after adjusting the measured flow rate to the maximum combustion chamber temperature, Tc, by using Tc instead of Tstd in the Method 2 calculation for Qc. The flow rate measured at the sampling point must be adjusted to chamber pressures. At the discretion of the Air Pollution Control Officer, alternative methods for determining Qc may be used if conditions are unacceptable for determining the combustion gas flow rate by Method 2.