Site Feedback

Website Feedback

This contact form is only for website help or website suggestions. If you have questions or comments regarding a published document please contact the publishing agency. Comments or questions about document content can not be answered by OFR staff. Please do not provide confidential information or personal data.

Title 40

This content is from the eCFR and is authoritative but unofficial.

Displaying title 40, up to date as of 7/10/2026. Title 40 was last amended 7/09/2026.
view historical versions
  1. Title 40 —Protection of Environment
  2. Chapter I —Environmental Protection Agency
  3. Subchapter C —Air Programs
  4. Part 63 —National Emission Standards for Hazardous Air Pollutants for Source Categories
  5. Subpart DDD —National Emission Standards for Hazardous Air Pollutants for Mineral Wool Production
  6. Performance Tests and Methods
  7. § 63.1190
  • Table of Contents
  • Details
  • Print/PDF
  • Display Options
  • Subscribe
  • Timeline
  • Go to Date
  • Compare Dates
  • Published Edition
  • Developer Tools
eCFR Content

The Code of Federal Regulations (CFR) is the official legal print publication containing the codification of the general and permanent rules published in the Federal Register by the departments and agencies of the Federal Government. The Electronic Code of Federal Regulations (eCFR) is a continuously updated online version of the CFR. It is not an official legal edition of the CFR.

Learn more about the eCFR, its status, and the editorial process.

§ 63.1190 How do I determine compliance?

(a) Using the results of the performance tests, you must use the following equation to determine compliance with the PM emission limit:

where:

E = Emission rate of PM, kg/Mg (lb/ton) of melt.

C = Concentration of PM, g/dscm (gr/dscf).

Q = Volumetric flow rate of exhaust gases, dscm/hr (dscf/hr).

K 51 = Conversion factor, 1 kg/1,000 g (1 lb/7,000 gr).

P = Average melt rate, Mg/hr (ton/hr).

(b) Using the results from the performance tests, you must use the following equation to determine compliance with the carbon monoxide, carbonyl sulfide, hydrogen fluoride, hydrogen chloride, formaldehyde, phenol, and methanol numerical emissions limits as specified in Table 2 to this subpart:

where:

E = Emission rate of measured pollutant, kg/Mg (lb/ton) of melt.

C = Measured volume fraction of pollutant, ppm.

MW = Molecular weight of measured pollutant, g/g-mole: Carbon monoxide = 28.01, carbonyl sulfide = 60.07, hydrogen fluoride = 20.01, hydrogen chloride = 36.46, Formaldehyde = 30.03, Phenol = 94.11, Methanol = 32.04.

CO = 28.01, Formaldehyde = 30.03.

Q = Volumetric flow rate of exhaust gases, dscm/hr (dscf/hr).

K1 = Conversion factor, 1 kg/1,000 g (1 lb/453.6 g).

K2 = Conversion factor, 1,000 L/m3 (28.3 L/ft3).

K3 = Conversion factor, 24.45 L/g-mole.

P = Average melt rate, Mg/hr (ton/hr).

[64 FR 29503, June 1, 1999, as amended at 80 FR 45330, July 29, 2015]

eCFR Content