Opacity definition

Opacity means the degree to which emissions reduce the transmission of light and obscure the view of an object in the background.

Opacity means the degree to which an object seen through a plume is obscured, stated as a percentage.

Opacity means that property of a substance tending to obscure vision and is measured as percent obscuration.

Examples of Opacity in a sentence

• Opacity will be verified using the Unit “certifiable” continuous opacity monitoring system (COMS).

• Ohio regulations limit opacity from the FCCU to 20%, to be measured by a Continuous Opacity Monitoring system (“COMS”).

• Opacity shall be measured in the stack or, if approved by EPA, after the outlet of the baghouse and corrected to stack exit.

• The required Initial Opacity Compliance Demonstration (IOCD) was conducted December 2008.

• Recent and planned emissions control improvements at Newton include the following: •Install low-NOx burners and controls on Unit 2 (2001) •Install low-NOx optimization program on Units 1 and 2 (2002) •Modify Unit 1 boiler to TSF2000 low-NOx (2003-2004) A-49 Opacity monitoring reports for the first three quarters of 2001 indicate excess emissions for only 0.06 and 0.64 percent of the operating time for Units 1 and 2, respectively.

More Definitions of Opacity

Opacity means the capacity to obstruct the transmission of light, expressed as percent.

Opacity means a state which renders material partially or wholly impervious to rays of light and causes obstruction of an observer's view.

Opacity means an optical measurement of the density of particulate matter in the exhaust flow of an engine, expressed in m-1;

Opacity means the degree to which emissions, excluding uncombined water, reduce the transmission of light and obscure the view of an object in the background as measured by EPA Method 9 or other method, as specified in each applicable rule.

Opacity means the percentage of light obstructed from passage through an exhaust smoke plume.

Opacity means the fraction of a beam of light, expressed in percent, which fails to penetrate a plume of smoke.

Opacity means that condition which renders material partially or wholly impervious to rays of light and causes a degree of obstruction to an observer's view.