PURPOSE: This rule restricts the emission of particulate matter in the source gas of an operation or activity except where 10 CSR 10- 5.030, 10 CSR 10-5.080 and/or 10 CSR 10- 6.070 would be applied.

1. (1) General Provisions.

   1. (A) This regulation applies to any operation, process or activity except the burning of fuel for indirect heating in which the products of combustion do not come into direct contact with process materials and except the burning of refuse and except the processing of salvageable material by burning.
   2. (B) Process weight means the total weight of all materials introduced into a source operation, including solid fuels, but excluding liquids and gases used solely as fuels and excluding air introduced for purposes of combustion.

   3. (C) Process weight rate means a rate established as follows:

      1. 1. For continuous or long-run steady-

state source operations, the total process weight for the entire period of continuous operation or for a typical portion, divided by the number of hours of that period or portion;

1. 2. For cyclical or batch source opera-

tions, the total process weight for a period which covers a complete operation or an integral number of cycles, divided by the hours of actual process operation during that period; and

1. 3. Where the nature of any process or

operation or the design of any equipment is to permit more than one (1) interpretation of this section, that interpretation which results in the minimum value for allowable emission shall apply.

1. (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.

1. (2) Emission Limitations.

   1. (A) Except as provided for in subsection (2)(B), 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 shown in paragraph (2)(A) Table I for the process weight allocated to that source.

      Table I

      Process Weight Rate

      Lb/Hr

      1,000 1,500 2,000 2,500 3,000 3,500 4,000 5,000 6,000 7,000 8,000 9,000 10,000 12,000 18,000 20,000 30,000 40,000 50,000 60,000 70,000 80,000 90,000

      100,000 120,000 140,000 Rate of Emission

Tons/Hr Lb/Hr 0.05 0.551 0.10 0.877 0.20 1.40 0.30 1.83 0.40 2.22 0.50 2.58 0.75 3.38 1.00 4.10 1.25 4.76 1.50 5.38 1.75 5.96 2.00 6.52 2.50 7.58 3.00 8.56 3.50 9.49 4.00 10.4 4.50 11.2 5.00 12.0 6.00 13.6 9.00 17.9 10.00 19.2 15.00 25.2 20.00 30.5 25.00 35.4 30.00 40.0 35.00 41.3 40.00 42.5 45.00 43.6 50.00 44.6 60.00 46.3 70.00 47.8 Specific to the St. Louis Metropolitan Area

Process Rate of

Weight Rate Emission

Lb/Hr Tons/Hr 160,000 80.00 200,000 100.00

1,000,000 500.00 2,000,000 1,000.00 6,000,000 3,000.00

Interpolation of the data in this table for process weight rates up to 60,000 lb/hr shall be accomplished by use of the equation

E = 4.10P 0.67

and interpolation and extrapolation of the data for process weight rates in excess of 60,000 lb/hr shall be accomplished by use of the equation:

E = 55.0P 0.11 - 40;

where: E = rate of emission in lb/hr; and P = process weight rate in tons/hr.

1. (B) The limitations established by subsection (2)(A) shall not require the reduction of particulate matter concentration, based on the source gas volume, below the concentration specified in subsection (2)(B), Table II 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 subsection (2)(C); 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 come within the provisions of this section.

   Table II

   Source Gas Concentration

Volume, Standard Grain Per Cubic Foot Standard Per Minute 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 Source Gas Concentration Volume, Standard Grain Per Lb/Hr Cubic Foot Standard 49.0 Per Minute Cubic Foot 160,000 0.036 51.2 69.0 180,000 0.035 200,000 0.034 77.6 300,000 0.030 92.7 400,000 0.027 500,000 0.025 600,000 0.024 800,000 0.021 1,000,000 or more 0.020

1. (C) Any volume of gases passing through and leaving an air pollution abatement operation may be substituted for the source gas volume of the source operation served by the air pollution abatement operation, for the purposes of subsection (2)(B), 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.
2. (D) No person shall cause, suffer, 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. If provisions of this subsection would permit a greater emission of particulate matter per hour than allowed by subsection (2)(A), the provision of this subsection (2)(D) shall not apply, except that the following regulation shall apply to existing grey iron jobbing cupolas. For purposes of this regulation, a jobbing cupola is defined as a cupola which has a single melting cycle no more than ten (10) hours in any consecutive twenty-four (24) hours and no more than fifty

3. (50) hours in any consecutive seven (7) days.

   1. 1. All existing grey iron jobbing cupolas

shall be equipped with gas cleaning devices and so operated as to remove eighty-five percent (85%) by weight of all the particulate

0.100 matter in the cupola discharge gases or 0.096 release not more than 0.4 grain of particulate 0.092 matter per standard cubic foot of discharge 0.089 gas, whichever is more stringent. 0.071

1. 2. All gases, vapors and gas entrained

0.062 effluents from those cupolas shall be inciner- 0.057 ated at a temperature not less than one thou- 0.053 sand two hundred degrees Fahrenheit (1200° 0.050 F) for a period of not less than 0.3 second. 0.045 0.042 (3) Exceptions. The following exceptions to 0.040 the provisions of this regulation shall be per- 0.038 mitted: 10 CSR 10-5

1. (A) For the grinding, crushing and classifying operations at a rock quarry; and
2. (B) For the receiving and shipping of whole grain from or into a railroad or truck transportation source at a grain elevator.

AUTHORITY: section 643.050, RSMo 1994.* Original rule filed March 14, 1967, effective March 24, 1967. Amended: Filed June 30, 1975, effective July 10, 1975. Amended: Filed March 15, 1979, effective Nov. 11, 1979. Amended: Filed Oct. 13, 1983, effective March 12, 1984. *Original authority 1965, amended 1972, 1992, 1993.