Since the winter of 2009, the AQD has asked that oil and gas operators develop short-term emission reduction plans that can be implemented with one-day notice from an impending elevated ozone forecast. Starting with the winter of 2013, the AQD promoted the expansion of short-term emission reduction measures on ozone action days by all stakeholders, including governmental agencies/entities and the public.
Ozone Contingency Plans
Ozone Contingency Plans (OCPs) identify activities that can reduce emissions and can be implemented upon one-day notice from the AQD of an impending Ozone Action Day (OAD). Examples of ways to reduce emissions on OADs include:
- Deferring non-essential construction and maintenance activities
- Delaying the refueling of trucks and equipment
- Eliminating truck idling when possible
This page provides ozone contingency plan participants with information and forms to implement these contingency plans.
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The AQD Monitoring Section helps ensure the ambient air quality in the State of Wyoming is maintained in accordance with the National Ambient Air Quality Standards (NAAQS). To carry out this goal, AQD operates and maintains a network of ambient air quality monitors to determine compliance with the NAAQS.
When areas, like the Upper Green River Basin, are not meeting the NAAQS, AQD also performs special monitoring studies such as the Upper Green Winter Ozone Study (UGWOS) to better understand ozone formation.
AQD also participates in EPA's national program to inform the public of the current air quality index called AirNow.
Current gaseous pollutant and visibility monitoring data can be viewed on www.wyvisnet.com.
Currently, for the 2015 Ozone National Ambient Air Quality Standards (NAAQS) – the most stringent ozone standard – all of Wyoming’s counties are meeting the standard and are in the process to be designated as attainment/unclassifiable by the U.S. Environmental Protection Agency (EPA).
What is a Ozone Nonattainment Area?
A ozone nonattainment area is one in which air quality does not meet the ozone standards set forth by the Federal government. On October 1, 2015, EPA revised the 8-hour primary and secondary National Ambient Air Quality Standards for ozone by lowering the level from 75 parts per billion (ppb) to 70 ppb.
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