PURPOSE: This rule 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 rule applies to installations which have indirect heating sources.
   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) The heat input used for each indirect heating source shall be the equipment manufacturer’s or designer’s guaranteed maximum input in millions of British Thermal Units (BTUs) per hour, whichever is greater.
   4. (D) The amount of particulate matter emitted shall be determined as specified in 10 CSR 10-6.030(5).

   5. (E) For the purpose of this rule only, the following terms shall have the meaning ascribed:

      1. 1. Existing—means any source which

was in being, installed or under construction on February 15, 1979, except that if any source is subsequently altered, repaired or rebuilt at a cost of thirty percent (30%) or more of its replacement cost, exclusive of routine maintenance, it shall no longer be existing but shall be considered as new; and

1. 2. New—means any source which is not

an existing source, as defined in paragraph (1)(E)1.

1. (F) This regulation shall not apply to indirect heating sources subject to the provisions of 10 CSR 10-6.070.
2. (G) 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.

1. (2) Maximum Allowable Particulate Emission Rate (ER) From Existing Indirect Heating Sources.

   1. (A) The total heat input of all existing indirect heating sources within an installation shall be used to determine the maximum allowable particulate ER, which is to be applied to each existing indirect heating source within the installation. After that, each indirect heating source within the installation shall be tested and considered independently for compliance with this rule.

   2. (B) Emission Limitations.

      1. 1. The maximum allowable particulate

ER for an installation of existing indirect heating sources with a heat input rate of less than ten (10) million BTUs per hour shall be 0.60 pounds per million BTUs of heat input.

1. 2. The maximum allowable particulate

ER for an installation of existing indirect heating sources with a heat input rate equal to or greater than ten (10) million BTUs per hour and less than or equal to five thousand (5000) million BTUs per hour shall be determined by the following equation:

E = 1.09(Q)-0.259

where E = the maximum allowable particulate ER 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.

1. 3. The maximum allowable particulate

ER for an installation of existing indirect heating sources with a heat input rate greater than five thousand (5000) million BTUs per hour shall be 0.12 pounds per million BTUs of heat input.

1. (3) Maximum Allowable Particulate ER From New Indirect Heating Sources.

   1. (A) The total heat input of all new and existing indirect heating sources within an installation shall be used to determine the 10 CSR 10-5

maximum allowable particulate ER which is to be applied to each new indirect heating source within the installation. The maximum allowable particulate ER from the existing indirect heating sources within such an installation shall be determined as specified in 10 CSR 10-5.030(2). After that, each indirect heating source within the installation shall be tested and considered independently for compliance with this rule.

1. (B) Emission Limitations.

   1. 1. The maximum allowable particulate

ER for new sources in an installation of indirect heating sources with a heat input rate of less than ten (10) million BTUs per hour shall be 0.40 pounds per million BTUs of heat input.

1. 2. The maximum allowable particulate

ER for new sources in an installation of indirect heating sources with a heat input rate equal to or greater than ten (10) million BTUs per hour and less than or equal to one thousand (1000) million BTUs per hour shall be determined by the following equation:

E = 0.80(Q)-.301

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

1. 3. The maximum allowable particulate

ER for new sources in an installation of indirect heating sources with a heat input rate greater than one thousand (1000) million BTUs per hour shall be 0.10 pounds per million BTUs of heat input.

1. (4) Compliance with this rule shall be accomplished by any installation as expeditiously as practicable, but in no case shall final compliance extend beyond three (3) years (March 25, 1979) from the effective date of this rule (March 25, 1976). In the interim each installation shall meet the allowable particulate emission rate applicable to that installation on October 25, 1978.

2. (5) Alternate Method of Compliance.

   1. (A) Compliance with this rule also may be demonstrated if the weighted average ER of two (2) or more indirect heating sources is less than or equal to the maximum allowable particulate ER determined in section (2) or (3). The weighted average ER for the indirect heating sources to be averaged shall be calculated by the following formula: n

      G (ERi.Qi) i = 1

      _____________________________

WAER= n

G Qi i = 1

where WAER = the weighted average ER in pounds per million BTUs; ERi = the actual ER of the ith indirect heating source in pounds per million BTUs; Qi = the rated heat input of the ith indirect heating source in millions of BTUs per hour; and n = the number of indirect heating sources in the average.

1. (B) Installations demonstrating compliance with this rule in accordance with the requirements of section (5) shall do so by making written application to the director. The application shall include the calculations performed in paragraph (5)(A)1. and all necessary information relative to making this demonstration. After written approval by the director, the ER used in the calculations of paragraph (5)(A)1. shall become the maximum allowable particulate ER for each specified indirect heating source under this rule.

2. (C) Section (5) only shall apply—

   1. 1. To indirect heating sources while

burning coal; and

1. 2. If the maximum allowable particulate

ER determined in subsection (5)(B) for each indirect heating source does not exceed the maximum allowable particulate ER determined for that source from section (2) or (3) using the rated heat input, Qi, for the individual indirect heating source as if that individual indirect heating source was the only such source at the installation.

AUTHORITY: section 643.050, RSMo 1994.* Original rule filed March 14, 1967, effective March 24, 1967. Rescinded and readopted: Filed Aug. 11, 1978, effective Feb. 11, 1979. Amended: Filed March 14, 1984, effective Sept. 14, 1984.

*Original authority: 643.050, RSMo 1965, amended 1972, 1992, 1993.