PURPOSE: This rule specifies the maximum allowable shade or opacity of visible air contaminant emissions 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) Application. This rule shall apply throughout Missouri except in the City of St. Louis and St. Charles, St. Louis, Jefferson, Franklin, Clay, Cass, Buchanan, Ray, Jackson, Platte and Greene Counties.
2. (2) Definitions of terms specified in this rule may be found in 10 CSR 10-6.020.

3. (3) Restrictions Applicable to Existing Installations. No person may discharge into the ambient air from any single existing source of emission whatsoever any air contaminant—

   1. (A) Of a shade or density equal to or darker than that designated as No. 2 on the Ringlemann Chart; or
   2. (B) Of an opacity as to obscure an observer’s view to a degree equal to or greater than does smoke designated as No. 2 on the Ringlemann Chart.

4. (4) Restrictions Applicable to New Installations. No person may discharge into the ambient air from any single new source of emission whatsoever, any air contaminant—

   1. (A) Of a shade or density equal to or darker than that designated as No. 1 on the Ringlemann Chart; or
   2. (B) Of an opacity as to obscure an observer’s view to a degree equal to or greater than does smoke designated as No. 1 on the Ringlemann Chart.

5. (5) Exceptions.

   1. (A) A person may discharge into the ambient air from any single source of emission for a period(s) aggregating no more than six (6) minutes in any sixty (60) minutes air contaminants—

      1. 1. Of a shade or density not equal to nor

darker than No. 3 on the Ringlemann Chart; or

1. 2. Of an opacity as to obscure an

observer’s view to a degree not equal to nor greater than does smoke designated as No. 3 on the Ringlemann Chart.

1. (B) For the purpose of subsection (5)(A), the staff director, for a specific source and for special conditions, may approve any other schedule.
2. (C) Where the presence of uncombined water is the only reason for failure of an emission to meet the requirements of section

1. (3) or (4) of this rule, those sections shall not apply.

   1. (D) The provisions of section (3) of this rule shall not apply to the following:

      1. 1. Transfer of molten metals;
      2. 2. Emissions from transfer ladles; or
      3. 3. Existing grey iron cupola furnaces.

   2. (E) This rule shall not apply to the following:

      1. 1. Internal combustion engines;
      2. 2. Wood burning stoves or fireplaces in

dwelling;

1. 3. Fires used for recreational purposes

or fires used for the noncommercial preparation of food by barbecuing;

1. 4. Fires used solely for the purpose of

training firemen;

1. 5. Smoke generating devices when a

required permit or a written determination that a permit is not required has been issued or written. A smoke generating device is a specialized piece of equipment which is not an integral part of a commercial, industrial or manufacturing process and whose sole purpose is the creation and dispersion of fine solid or liquid particles in a gaseous medium;

1. 6. Incinerators used to burn refuse;
2. 7. The pyrolysis of wood for the pro-

duction of charcoal in batch-type charcoal kilns (Emissions from batch-type charcoal kilns shall comply with the requirements of

10 CSR 10-6.330 Restriction of Emissions From Batch-Type Charcoal Kilns); and

1. 8. Open burning of refuse.

1. (6) Method of Measurement.

   1. (A) The Ringlemann Chart shall be the standard in grading the shade or opacity of visible air contaminant emissions. The staff director, with the consent of the source operator, may employ any other means of measurement which gives comparable results or results of greater accuracy.
   2. (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 (BTU)/hour heat input and portland cement calcining kiln operations.

   3. (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 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.

   1. 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 staff 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, that 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 data or 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 staff 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 staff director.

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 bag-houses which emit from multiple

(12/31/98)* Rebecca McDowell Cook

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 staff director within sixty (60) days (June 1, 1971) of its effective date (April 13, 1971).

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 staff director.

1. 3. Effective dates of compliance.

Facilities affected by this rule shall comply within twelve (12) months (April 1, 1972) of its effective date (April 3, 1971).

1. (7) Time Schedule for Compliance.

   1. (A) Except as otherwise specified, compliance with the provisions of this rule shall be according to the following time schedule:

      1. 1. All new installations shall comply

when operation begins;

1. 2. All existing installations not in com-

pliance as of the effective date (April 3, 1971) of this rule shall be in compliance within six (6) months (September 3, 1971) unless the owner or person responsible for the operation of the installation shall have submitted to the staff director in a form and manner satisfactory to him/her, a program and schedule for achieving compliance, this program and schedule to contain a date on or before which full compliance will be attained and other information as the staff director may require. If approved by the staff director, that date will be the date on which the person shall comply; and

1. 3. The staff director may require per-

sons submitting the program to submit periodic subsequent reports on progress in achieving compliance.

AUTHORITY: section 643.050, RSMo Supp. 1997.* Original rule filed March 24, 1971, effective April 3, 1971. Amended: Filed Jan. 31, 1972, effective Feb. 10, 1972. Amended: Filed Jan. 14, 1977, effective July 11, 1977. Amended: Filed Aug. 16, 1977, effective Feb. 11, 1978. Amended: Filed March 15, 1979, effective Nov. 11, 1979. Emergency amendment filed June 15, 1995, effective June 25, 1995, expired Oct. 22, 1995. Amended: Filed Sept. 14, 1995, effective May 30, 1996. Amended: Filed June 15, 1998, effective Jan. 30, 1999. *Original authority 1965, amended 1972, 1992, 1993, 1995. Rebecca McDowell Cook (12/31/98)*