# COMAR Title 26 — Department of the Environment

## Subtitle 11 — Air Quality

### Chapter 25 — Control of Glass Melting Furnaces

#### Regulation .03 Visible Emissions from Glass Melting Furnaces.

*COMAR 26.11.25.03*

A. General Requirements.

  (1) A person may not cause or permit the discharge of emissions of greater than 20 percent opacity from a glass melting furnace.

  (2) A person may not cause or permit the discharge of fugitive emissions of greater than 20 percent opacity from a building containing forming and post-forming equipment.

B. Exceptions.

  (1) The provisions of §A(1) and (2) of this regulation do not apply to emissions that occur during process modifications or adjustments and that are not greater than 40 percent opacity for a period of not more than 6 consecutive minutes in any 60 minutes.

  (2) A person who owns or operates a gas-fired installation subject to this chapter other than an opal recipe glass melting furnace is not eligible for a visible emission exception under COMAR 26.11.06.02B for that installation.