Virginia Regulatory Town Hall
Natural and Historic Resources
Department of Environmental Quality
Air Pollution Control Board
Mandate 313

Mandate Information
Mandate Title:
Air Pollution- methods to determine opacity
Purpose of legislation
Authorizes DEQ to use (i) visual observations conducted pursuant to methods approved by EPA, (ii) data from certified continuous opacity monitors, or (iii) other methods approved by EPA to determine whether opacity requirements or opacity limits for air quality are being met.
Legislation mandating a change Chap 0148 (2007)
VAC chapters to be amended
9 vac 5 - 40 : Existing Stationary Sources
Associated Regulatory Actions
Action 2505: Opacity Source Surveillance Methods (Rev. F07)
Latest Stage: Final
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