PURPOSE: This regulation restricts the emission of filterable particulate matter in the source gas of an operation or activity except where 10 CSR 10-6.405 and/or 10 CSR 10-6.070 would be applied.

1. (1) Applicability.

   1. (A) This regulation applies to any operation, process, or activity that emits particulate matter.

   2. (B) The provisions of this rule shall not apply to the following:

      1. 1. Cotton gins;
      2. 2. The grinding, crushing, and classifying operations at a

rock quarry;

1. 3. The receiving and shipping of whole grain from or into

a railroad or truck transportation source at a grain elevator;

1. 4. Smoke generating devices, as defined in subsection (2)(D)

of this rule, when a required permit or a written determination that a permit is not required has been issued or written;

1. 5. Batch-type charcoal kilns required to comply with 10

CSR 10-6.330;

1. 6. The burning of fuel for indirect heating;
2. 7. Fugitive emissions;
3. 8. Emission sources that are exempt from construction

permitting under 10 CSR 10-6.061;

1. 9. Emission sources that are permitted by rule under 10

CSR 10-6.062;

1. 10. The burning of refuse;
2. 11. The processing of salvageable material by burning;
3. 12. Emission units that at maximum design capacity have

a potential to emit less than one-half (0.5) pounds per hour of particulate matter;

1. 13. The grinding, crushing, and conveying operations at a

power plant;

1. 14. Coating operations equipped with a control system

designed to control at least ninety-five percent (95%) of the particulate overspray provided the system is operated and maintained in accordance with manufacturers’ specifications or comparable maintenance procedures that meet or exceed manufacturers’ specifications;

1. 15. Any particulate matter emission unit that is subject

to a federally enforceable requirement to install, operate, and maintain a particulate matter control device system that controls at least ninety percent (90%) of particulate matter emissions; and

1. 16. Emission units that at maximum hourly design rate

(MHDR) have an uncontrolled potential to emit less than the allowable emissions as calculated in paragraphs (3)(A)1. and (3) (A)2. of this rule.

1. (C) In the event that other rules in Title 10 Code of State Regulations are also applicable to particulate matter emission units, the more stringent requirement shall apply.

1. (2) Definitions. Definitions of certain terms specified in this rule may be found in 10 CSR 10-6.020.

2. (3) General Provisions.

   1. (A) Emission Limitations. All applicable sources, except grey iron jobbing cupolas and corn wet milling drying processes, shall meet the following requirements:

      1. 1. Except as provided for in paragraph (3)(A)2. and

subsection (1)(B) of this rule, no person shall cause, suffer, allow or permit the emission of particulate matter in any one (1) hour from any source in excess of the amount calculated using one of the following equations selected based on the applicable process weight rate: For process weight rates of 60,000 pounds per hour (lb/hr) or less:

E = 4.10P 0.67

and for process weight rates greater than 60,000 lb/hr:

E = 55.0P 0.11 – 40;

where: E = rate of emission in lb/hr; and P = process weight rate in tons per hour (tons/hr); or

1. 2. The limitations established by paragraph (3)(A)1. of

this rule shall not require the reduction of particulate matter concentration, based on the source gas volume, below the concentration specified in paragraph (3)(A)2., Table I of this rule for that volume; provided that, for the purposes of this section, the person responsible for the emission may elect to substitute a volume determined according to the provisions of paragraph (3)(A)3. of this rule; and provided further that the burden of showing the source gas volume or other volume substituted, including all the factors which determine volume and the methods of determining and computing the volume shall be on the person seeking to comply with the provisions of this section. Table I Source Gas Volume (at Standard Concentration Grain Cubic Foot Per Minute) Per Cubic Foot 7,000 or less 8,000 9,000 10,000 20,000 30,000 40,000 50,000 60,000 80,000 100,000 120,000 140,000 160,000 180,000 200,000 300,000 400,000 500,000 600,000 800,000 1,000,000 or more

1. 3. Any volume of gases passing through and leaving an

air pollution abatement operation may be substituted for the source gas volume of the emission unit served by the air pollution abatement operation, for the purposes of paragraph (3)(A)2. of this rule, provided that air pollution abatement operation emits no more than forty percent (40%) of the weight of particulate matter entering; and provided further that the substituted volume shall be corrected to standard conditions and to a moisture content no greater than that of any gas stream entering the air pollution abatement operation and further provided that there is an enforceable requirement to operate the air pollution abatement equipment; and

1. 4. Notwithstanding the provisions of paragraphs (3)(A)1.

and (3)(A)2. of this rule, no person shall cause, allow, or permit the emission of particulate matter from any source in a concentration in excess of 0.30 grain per standard cubic foot of exhaust gases.

1. (B) Grey iron jobbing cupolas shall meet the following requirements:

   1. 1. Cupolas shall be equipped with gas cleaning devices

operated to remove not less than eighty-five percent (85%) by weight of all the particulate matter in the cupola discharge gases or release not more than 0.4 grain of particulate matter per standard cubic foot of discharge gas, whichever is more stringent; and

1. 2. All gases, vapors, and gas entrained effluents shall be

incinerated at a temperature not less than one thousand two hundred degrees Fahrenheit (1,200 °F) for a period of not less than 0.3 seconds.

1. (C) All existing corn wet milling drying processes shall be equipped with gas cleaning devices operated to remove not less than ninety-nine and one-half percent (99.5%) by weight of all particulate matter in the dryer discharge gases or release not more than one one-hundredth grain of particulate matter per dry standard cubic foot (0.01 gr/dscf) of discharge gas.

1. (4) Reporting and Record Keeping. All records of any tests performed to determine the amount of particulate matter 0.100 0.096 0.092 0.089 0.071 0.062 0.057 0.053 0.050 0.045 0.042 0.040 0.038 0.036 0.035 0.034 0.030 0.027 0.025 0.024 0.021 0.020; or emitted from a unit shall be kept on-site and available for inspection for five (5) years following the test date.

2. (5) Test Methods. The following hierarchy of emission measurement approaches shall be used to determine compliance with section (3) of this rule. If compliance data is not available from a measurement approach, or an approach is impractical for a source, then the next approach listed in the hierarchy shall be used in its place. The choice of an emissions measurement approach is subject to the approval of the director—

   1. (A) Continuous Emission Monitoring System (CEMS);
   2. (B) Stack tests as specified in 10 CSR 10-6.030(5)(A) or (5)(B), as determined by the director;
   3. (C) Compliance Assurance Monitoring (CAM) plan found in the facility’s operating permit; or
   4. (D) Other methods, as described in permits issued under 10 CSR 10-6.060 or 10 CSR 10-6.065 or as approved by the director. These may include approved engineering calculations or other U.S. Environmental Protection Agency documentation.

AUTHORITY: section 643.050, RSMo Supp. 2012.* Original rule filed Jan. 14, 2000, effective Aug. 30, 2000. Amended: Filed Dec. 22, 2000, effective Sept. 30, 2001. Amended: Filed Sept. 9, 2008, effective May 30, 2009. Amended: Filed July 1, 2010, effective Feb. 28, 2011. Amended: Filed Sept. 16, 2011, effective May 30, 2012. Amended: Filed March 13, 2013, effective Oct. 30, 2013. AUTHORITY: section 643.050, RSMo 2016.* Original rule filed Feb. 25, 2011, effective Oct. 30, 2011. Amended: Filed Nov. 25, 2019, effective Sept. 30, 2020.

*Original authority: 643.050, RSMo 1965, amended 1972, 1992, 1993, 1995, 2011. where 10 CSR 10-6.070 would be applied. PUBLISHER’S NOTE: The secretary of state has determined that the publication of the entire text of the material which is incorporated by reference as a portion of this rule would be unduly cumbersome or expensive. This material as incorporated by reference in this rule shall be maintained by the agency at its headquarters and shall be made available to the public for inspection and copying at no more than the actual cost of reproduction. This note applies Area of State only to the reference material. The entire text of the rule is printed here. Kansas City & St. Louis Metropolitan (1) Applicability. (A) This rule applies throughout the state with additional conditions applicable to the metropolitan areas of Kansas City, Springfield-Greene Springfield, and St. Louis as found in sections (2) and (3) of this County & rule. Outstate Missouri (B) This rule 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 may include, but are not limited to, coal, tire derived fuel, coke, lignite, coke breeze, gas, fuel oil, biomass, and wood, but do not include refuse. When any products or byproducts of a manufacturing process are burned for the same purpose or in Area of State conjunction with any fuel, the same maximum emission rate limitations apply. (C) An emission unit that is subject to 10 CSR 10-6.070 and Kansas City & St. Louis Metropolitan Springfield-Greene County & Outstate Missouri in compliance with applicable provisions; or an emission unit fueled by landfill gas, propane, natural gas, fuel oils #2 through #6 (with less than one and two-tenths percent (1.2%) sulfur), and/or other gases (with hydrogen sulfide levels less than or equal to four (4) parts per million volume as measured using ASTM D4084, as specified in 10 CSR 10-6.040(23), or equivalent and mercury concentrations less than forty (40) micrograms per cubic meter as measured using ASTM D5954, as specified in 10 CSR 10-6.040(30), or ASTM D6350, as specified in 10 CSR 10-6.040(32), or equivalent) would be deemed in compliance with 10 CSR 10-6.405. (D) The heat input from emission units in subsection (1) (C) of this rule must be included in the calculation of Q, the installation’s total heat input as defined in subsections (3)(D) and (3)(E) of this rule. (E) An installation is exempt from this rule if all of the installation’s applicable units are fueled only by landfill gas, propane, natural gas, fuel oils #2 through #6 (with less than one and two-tenths percent (1.2%) sulfur), or other gases (with hydrogen sulfide levels less than or equal to four (4) parts per million volume as measured using ASTM D4084, as specified in 10 CSR 10-6.040(23), or equivalent and mercury concentrations less than forty (40) micrograms per cubic meter as measured using ASTM D5954, as specified in 10 CSR 10-6.040(30), or ASTM D6350, as specified in 10 CSR 10-6.040(32), or equivalent) or any combination of these fuels. (2) Definitions. (A) Existing—Any source which was in being, installed, or under construction on the date provided in the following table: Outstate Area February 24, 1971 *Exception: If any source subsequently is altered, repaired, or rebuilt at a cost of thirty percent (30%) or more of its replacement cost, exclusive of routine maintenance, it no longer is considered an existing source but will be considered a new source. Rate Limits for Existing (B) New—Any source which is not an existing source, as Heat Input (mmBtu/hour) Sources (pounds/mmBtu) defined in subsection (2)(A) of this rule. (C) Definitions of certain terms specified in this rule, other <10 than those defined in this rule section, may be found in 10 CSR ≥10 and ≤5,000 E=1.09Q-0.259 10-6.020. >5,000 ≤10 (3) General Provisions. (A) The heat content of solid fuels shall be determined as >10 and <10,000 E=0.90Q-0.174 specified in 10 CSR 10-6.040(2). The heat content of liquid ≥10,000 hydrocarbon fuels shall be determined as specified in 10 CSR 10-6.040(3). (B) For purposes of this rule, the heat input is the aggregate heat content of all fuels whose products of combustion pass through a stack(s). The hourly heat input value used shall be the equipment manufacturer’s or designer’s guaranteed maximum input, whichever is greater, except in the case of boilers of ten (10) million British thermal units (mmBtu) or less the heat input can also be determined by the higher heating Rate Limits for New Heat Input (mmBtu/hour) value (HHV) of the fuel used at maximum operating conditions. Sources (pounds/mmBtu) The total heat input of all fuel burning units used for indirect <10 heating at a plant or on a premises is used for determining the ≥10 and ≤1,000 E=0.80Q-0.301 >1,000 ≤10 >10 and <2,000 E=1.31Q-0.338 ≥2,000 0.60 0.12 0.60 0.18 0.40 0.10 0.60 0.10 maximum allowable amount of particulate matter which may Area of State Contruction date began on or before be emitted. Kansas City Metropolitan Area February 15, 1979 (C) Indirect heating sources requiring permits under 10 CSR St. Louis Metropolitan Area February 15, 1979 10-6.060 that in turn may require particular air pollution control Springfield-Greene County Area September 24, 1971 measures to meet more stringent emission rate limitations Outstate Area February 24, 1971 than in this rule shall meet the requirements of the permits issued under 10 CSR 10-6.060 Construction Permits Required. Area of State Contruction date began on or before (D) Emission Rate Limitations for Existing Indirect Heating Kansas City Metropolitan Area February 15, 1979 Sources. No person may cause, allow, or permit the emission St. Louis Metropolitan Area of particulate matter from existing indirect heating sources in February 15, 1979 excess of that specified in the following table: Springfield-Greene County Area September 24, 1971 Rate Limits for Existing Outstate Area February 24, 1971 Area of State Heat Input (mmBtu/hour) Sources (pounds/mmBtu) <10 Kansas City & ≥10 and ≤5,000 E=1.09Q-0.259 St. Louis Metropolitan >5,000 ≤10 Springfield-Greene County & >10 and <10,000 E=0.90Q-0.174 Rate Limits for Existing Area of State Heat Input (mmBtu/hour) Outstate Missouri Sources (pounds/mmBtu) ≥10,000 <10 Kansas City & ≥10 and ≤5,000 E=1.09Q-0.259 Where: St. Louis Metropolitan >5,000 E = the maximum allowable particulate emission rate limit for existing sources in pounds per mmBtu of heat input, rounded ≤10 Springfield-Greene off to two (2) decimal places; and County & >10 and <10,000 E=0.90Q-0.174 Q = the summation of heat input in mmBtu/hour from Outstate Missouri ≥10,000 all affected fuel burning equipment at a source (including Rate Limits for New Area of State Heat Input (mmBtu/hour) Sources (pounds/mmBtu) existing equipment, new equipment, NSPS units, and other <10 clean units identified in subsection (1)(C) of this rule). Kansas City & (E) Emission Rate Limitations for New Indirect Heating ≥10 and ≤1,000 E=0.80Q-0.301 St. Louis Metropolitan Sources. No person may cause, allow, or permit the emission >1,000 of particulate matter in excess of that specified in the following ≤10 Springfield-Greene table: County & >10 and <2,000 E=1.31Q-0.338 Rate Limits for New Outstate Missouri Area of State Heat Input (mmBtu/hour) ≥2,000 Sources (pounds/mmBtu) <10 Kansas City & ≥10 and ≤1,000 E=0.80Q-0.301 St. Louis Metropolitan >1,000 ≤10 Springfield-Greene County & >10 and <2,000 E=1.31Q-0.338 Outstate Missouri ≥2,000 Where: E = the maximum allowable particulate emission rate limit for new sources in pounds per mmBtu of heat input, rounded off to two (2) decimal places; and Q = the summation of heat input in mmBtu/hour from all affected fuel burning equipment at a source (including existing equipment, new equipment, NSPS units, and other clean units identified in subsection (1)(C) of this rule). (F) Alternate Method of Compliance. 1. Compliance with this rule also may be demonstrated if the weighted average emission rate (WAER) of two (2) or more indirect heating sources is less than or equal to the maximum allowable particulate E determined in subsection (3)(D) or (3) (E) of this rule. The WAER for the indirect heating sources to be averaged is calculated by the following formula: 0.60 0.12 0.60 0.18 0.60 0.12 0.60 0.18 0.40 0.10 0.60 0.10 0.40 0.10 0.60 0.10 n ∑ (Eai x Qi) i=1 WAER = n ∑ Qi i=1 Where: WAER = the weighted average emission rate in pounds per mmBtu; Eai = the actual emission rate of the ith indirect heating source in pounds per mmBtu; Qi = the rated heat input of the ith indirect heating source in mmBtu per hour; and n = the number of indirect heating sources in the average. 2. Installations demonstrating compliance with this rule in accordance with the requirements of subsection (3)(F) of this rule do so by making written application to the director. The application shall include the calculations performed in paragraph (3)(F)1. of this rule and all necessary information relative to making this demonstration. 3. Subsection (3)(F) of this rule only applies if the WAER determined by paragraph (3)(F)2. of this rule for indirect heating sources does not exceed the maximum allowable particulate E determined for that source from subsection (3)(D) or (3)(E) of this rule when 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. (4) Reporting and Record Keeping. All records must be kept on-site for a period of five (5) years and made available to the department upon request. The owner or operator shall maintain records of the following information for each year the unit is operated: (A) The identification of each affected unit and the name and address of the plant where the unit is located for each unit subject to this rule; (B) The calendar date of the record; (C) The emission rate in pounds per mmBtu for each unit on an annual basis for those units complying with the limit in subsections (3)(D) and (3)(E) of this rule; and (D) The emission rate in pounds per mmBtu for each facility on an annual basis for those units complying with subsection (3)(F) of this rule. (5) Test Methods. The following hierarchy of methods shall be used to determine compliance with subsections (3)(D) and (3) (E) of this rule: (A) Continuous Emission Monitoring System (CEMS); (B) Stack tests, as specified in 10 CSR 10-6.030(5)(A) or (5)(B); (C) Other EPA documents; (D) Compliance Assurance Monitoring (CAM) Plans as found in a facility operating permit may be used to provide a reasonable assurance of compliance with subsections (3)(D) and (3)(E) of this rule; (E) Sound engineering calculations; (F) Any other method, such as AP-42 (U.S. Environmental Protection Agency (EPA) Compilation of Air Pollutant Emission Factors) or Factor Information and Retrieval System (FIRE), approved for the source by incorporation into a construction or operating permit, settlement agreement, or other federally enforceable document. AP-42 (Environmental Protection Agency (EPA) Compilation of Air Pollutant Emission Factors) and Factor Information and Retrieval System (FIRE) as published by EPA January 1995 and August 1995 are hereby incorporated by reference in this rule. Copies can be obtained from the National Technical Information Service (NTIS), 5285 Port Royal Road, Springfield, VA 22161. This rule does not incorporate any subsequent amendments or additions; or (G) Other alternate emission estimation methods not listed in this section when pre-approval is obtained from the department and EPA before using such methods to estimate emissions. *Original authority: 643.050, RSMo 1965, amended 1972, 1992, 1993, 1995, 2011.