PURPOSE: This rule specifies the maximum allowable shade or opacity of visible air contaminant emissions, unless exempt or regulated by 10 CSR 10-6.070, and requires the use of opacity monitoring devices on certain air contaminant sources.

PUBLISHER’S NOTE: The publication of the full text of the material that the adopting agency has incorporated by reference in this rule would be unduly cumbersome or expensive. Therefore, the full text of that material will be made available to any interested person at both the Office of the Secretary of State and the office of the adopting agency, pursuant to section 536.031.4, RSMo. Such material will be provided at the cost established by state law.

1. (1) Restrictions Applicable to All Installations.

   1. (A) No person shall discharge into the atmosphere from any single source of emission, any air contaminant of a shade or density equal to or darker than that designated as No.1 on the Ringelmann Chart or twenty percent (20%) opacity.
   2. (B) This section shall not apply to existing sources, other than incinerators, which emit less than twenty-five (25) pounds per hour of particulate.

2. (2) Restrictions Applicable to Existing Installations, Other Than Incinerators, Which Emit Less Than Twenty-Five (25) Pounds Per Hour of Particulate.

   1. (A) No person exempted from the provisions of section (1) shall discharge into the atmosphere from any single source of emission, any air contaminant of a shade or density equal to or darker than that designated as No. 2 on the Ringelmann Chart or forty percent (40%) opacity.
   2. (B) This section shall not apply to incinerators.

3. (3) Exceptions.

   1. (A) A person subject to section (1) may discharge into the atmosphere from any single source of emission for a period(s) aggregating not more than six (6) minutes in any sixty (60) minutes air contaminants of a shade or density not darker than No. 2 on the Ringelmann Chart or forty percent (40%) opacity.
   2. (B) Where the presence of uncombined water is the only reason for failure of an emission to meet the requirements of section

4. (1) or (2) of this regulation, that section shall not apply.

   1. (C) The provisions of sections (1) and (2) of this regulation shall not apply to the following:

      1. 1. Transfer of molten metals;
      2. 2. Emissions from transfer ladles;
      3. 3. Coke ovens when pushing coke from

oven;

1. 4. Water quenching of coke on discharge

from ovens; or

1. 5. Existing grey iron jobbing cupolas as

defined in 10 CSR 10-5.050.

1. (4) Method of Measurement.

   1. (A) The Ringelmann Chart published and described in the United States Bureau of Mines Information Circular 7718 or the United States Public Health Service Smoke Inspection Guide as described in the Federal Register, Title 42, chapter 1, subchapter F, part 75, shall be used in grading the shade or opacity of visible air contaminant emissions. The director of the Department of Natural Resources may specify other means of measurement which give comparable results or Specific to the St. Louis Metropolitan Area

results of greater accuracy. The two (2) publications described in this subsection are made a part of this regulation by reference.

1. (B) The installation of opacity monitoring devices shall be required on fluid bed catalytic cracking unit catalyst regenerators, coalfired steam generating units with greater than two hundred fifty (250) million British Thermal Units (BTUs)/hour heat input and portland cement calcining kiln operations.

2. (C) Minimum Specifications.

   1. 1. Performance specifications. Continu-

ous monitoring systems for monitoring opacity shall comply with performance specification 1 as set forth in 40 CFR part 60, Appendix B, “Performance Specification 1.”

1. 2. Cycling time. Cycling times include

the total time a monitoring system requires to sample, analyze and record an emission measurement. Continuous monitoring systems for measuring opacity shall complete a minimum of one (1) cycle of operation (sampling, analyzing and data recording) for each successive ten (10)-second period.

1. 3. Monitor location. All continuous

monitoring systems or monitoring devices shall be installed so that the measurements obtained are representative measurements of emissions occurring within the discharged opacity profile.

1. 4. Combined effluents. When the efflu-

ents from two (2) or more affected facilities of similar design and operating characteristics are combined before being released to the atmosphere, opacity monitoring systems may be installed on the combined effluent.

1. 5. Zero and drift. The owners or opera-

tors of all continuous monitoring systems installed in accordance with the requirements of this rule shall record the zero and drift at least once daily unless the manufacturer has recommended adjustments at shorter intervals at which case those recommendations shall be followed and shall adjust the zero and span whenever the twenty-four (24)-hour zero drift or twenty-four (24)-hour calibration drift limits in 40 CFR part 60, Appendix B, “Performance Specification 1” are exceeded or whenever the twenty-four (24)-hour zero drift or twenty-four (24)-hour calibration drift exceed ten percent (10%) of the emission standard.

1. 6. Span. Instrument span shall be

approximately two hundred percent (200%) of the expected instrument data display output corresponding to the emission standard for the source.

1. (D) Minimum Data Requirements.
2. 1. Written reports required. Owners or

operators of facilities required to install continuous monitoring systems shall submit a written report of excess emissions for each calendar quarter and the nature and cause of the excess emissions, if known, to the director. All quarterly reports shall be postmarked by the thirtieth day following the end of each calendar quarter.

1. 2. Data summary. The data summary

shall consist of the magnitude in actual percent opacity of all six (6)-minute averages of opacity greater than the opacity emission limitation. Average of values may be obtained by integration over the averaging period or by arithmetically averaging a minimum of twenty-four (24) equally spaced instantaneous opacity measurements per six (6)-minute period. A one (1)-hour period means any sixty (60)-minute period commencing on the hour and a six (6)-minute period means any one (1) of ten (10) equal parts of a one (1)- hour period.

1. 3. Inoperative periods. The date and

time identifying each period during which the continuous monitoring system was inoperative (except for zero and span checks) and the nature of system repairs or adjustments shall be reported.

1. 4. No excess emissions. When no excess

emissions have occurred during the reporting period and the continuous monitoring system has not been inoperative, repaired or adjusted, this information shall be included in the report.

1. 5. Files to be maintained. Owners or

operators of affected facilities shall maintain a file of all information reported in the quarterly summaries and all other data collected either by the continuous monitoring system or as necessary to convert monitoring data to the units of the applicable standard, for a minimum of two (2) years from the date of collection of the data of submission of summaries.

1. (E) Special Considerations.

   1. 1. Alternatives. Alternative monitoring

requirements, system locations and procedures for performing calibration checks which do not meet the requirements of this rule but adequately demonstrate a definite and consistent relationship with the intent of this rule may be approved by the director.

1. 2. Exceptions.

   1. A. Coal-fired steam generating units

that have an annual boiler capacity factor of thirty percent (30%) or less as currently defined by the Federal Power Commission shall be exempt from these monitoring requirements.

1. B. Coal-fired boilers and portland

cement calcining kilns scheduled for retirement prior to January 1, 1981, shall be exempt from these monitoring requirements subject to receipt and approval of an affidavit by the director. 10 CSR 10-5

1. C. Coal-fired boilers which utilize

flue gas desulfurization equipment shall be exempt from these monitoring requirements.

1. D. Portland cement calcining kilns

whose particulate emissions are controlled with baghouses which emit from multiple stacks or vents shall be exempt from these opacity monitoring requirements.

1. (F) Compliance.

   1. 1. Owners or operators of affected facil-

ities shall submit a plan for meeting the requirements of this rule to the director within sixty (60) days of its effective date (October 24, 1976).

1. 2. Notwithstanding compliance with any

other provision of this rule, no owner or operator of a facility affected by this rule will be deemed to be in compliance until the compliance plan receives the written approval of the director.

1. 3. Effective dates of compliance. Facili-

ties affected by this rule shall comply within twelve (12) months of its effective date (March 25, 1977).

1. (5) Compliance Schedule. Existing installations subject to section (1), other than incinerators, shall be in compliance with section
2. (1) by July 1, 1978. Those existing sources, except incinerators, which are subject to section (1) shall comply with the limitations of section (2) until July 1, 1978. All incinerators and new sources shall comply with section
3. (1) on March 25, 1976.

AUTHORITY: section 643.050, RSMo (1994).* Original rule filed March 14, 1967, effective March 24, 1967. Amended: Filed Jan. 14, 1977, effective July 11, 1977. *Original authority 1965, amended 1972, 1992, 1993.