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Rule Title: "Opacity" defined

Agency
Nevada Administrative Code
Affected Area
Agency-Wide Provisions
Regulation
Nac, Chapter 445B, Chapter 445, Air Controls - Definitions
Rule #
445B.121
Adoption Date
09/16/1976
Submittal Date
01/12/2006
Final Federal Register Date
03/27/2006
Federal Register Citation #
71 FR 15040

 

NAC 445B.121 “Opacity” defined. “Opacity” means the property of a substance tending to obscure vision and measured in terms of percent obscuration. The relationship between opacity and Ringelmann number is approximately equal to the following in shades of white to gray. Opacity Ringelmann (Percent) Number 20..........................1 40..........................2 60..........................3 80..........................4 100..........................5 [Environmental Comm’n, Air Quality Reg. 1.44, eff. 11-7-75; renumbered as 1.120, 12-4-76]—(Substituted in revision for NAC 445.557)

This SIP Citation Was Last Modified on September 22, 2014. EPA has attempted to assure that the action logs accurately reflect the actions published in the Federal Register. If there are discrepancies, however, the Federal Register is the official record. Send State Implementation Plan comments and questions to wilder.ceciley@epa.gov.

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