PURPOSE: This regulation restricts the emission of particulate matter from fuel burning equipment used for indirect heating except where 10 CSR 10-6.070 would be applied.

1. (1) General Provisions.

   1. (A) This regulation applies to installations in which fuel is burned for the primary purpose of producing steam, hot water or hot air or other indirect heating of liquids, gases or solids and, in the course of doing so, the products of combustion do not come into direct contact with process materials. Fuels include those such as coal, coke, lignite, coke breeze, gas, fuel oil and wood but do not include refuse. When any products or byproducts of a manufacturing process are burned for the same purpose or in conjunction with any fuel, the same maximum emission limitations shall apply.
   2. (B) The heat content of solid fuels shall be determined as specified in 10 CSR 10- 6.040(2). The heat content of liquid hydrocarbon fuels shall be determined as specified in 10 CSR 10-6.040(3).
   3. (C) For purposes of this regulation, the heat input shall be the aggregate heat content of all fuels whose products of combustion pass through a stack(s). The heat input value used shall be the equipment manufacturer’s or designer’s guaranteed maximum input, whichever is greater. The total heat input of all fuel burning units at a plant or on a premises shall be used for determining the maximum allowable amount of particulate matter which may be emitted.
   4. (D) The amount of particulate matter emitted shall be determined as specified in 10 CSR 10-6.030(5). Any other method which is in accordance with good professional practice may be used with the consent of the staff director.
   5. (E) This rule shall not apply to indirect heating sources subject to the provisions of 10 CSR 10-6.070.
   6. (F) Indirect heating sources requiring permits under 10 CSR 10-6.060 that in turn may require particular air pollution control measures to meet more stringent emission limitations than in this rule shall meet the requirements of 10 CSR 10-6.060 Permits Required.

2. (2) Emission Limitations.

   1. (A) No person may cause, allow or permit the emission of particulate matter in excess of that specified in the following schedule:

      1. 1. If the equipment has a capacity rating

of ten (10) million British Thermal Units (BTUs) or less, 0.60 pounds for each million BTUs per hour input; or

1. 2. If the equipment has a capacity rating

of ten thousand (10,000) million BTUs or more, 0.12 pounds for each million BTUs per hour input.

1. (B) The amount of particulate matter which may be emitted from fuel burning equipment having an intermediate capacity rating between ten (10) million and ten thousand (10,000) million BTUs shall be determined by use of the following equation:

   E=1.02(Q)-0.233

where E=the maximum allowable particulate emission rate in pounds per million BTUs of heat input; rounded off to two (2) decimal places; and Q=the installation heat input in millions of BTUs per hour.

AUTHORITY: section 203.050, RSMo (1986). Original rule filed Dec. 5, 1969, effective Dec. 15, 1969. Amended: Filed March 15, 1979, effective Nov. 11, 1979. Amended: Filed Oct. 13, 1983, effective March 12, 1984. Amended: Filed March 14, 1984, effective Sept. 14, 1984.