All posts in “Regulatory News”

Navigating Cleaner Air Oregon (CAO)

To track emissions at the national level, the United States Environmental Protection Agency (EPA) requires Oregon (and other states) to conduct statewide inventories from all sources of air pollution. These data collected from across the country are used for making new rules and modeling air pollution.

A few years in the making, Cleaner Air Oregon (CAO) addresses this need and is already affecting many companies in the state. As of November 2018, all permitted facilities should have already submitted emissions inventories for their sources to the Oregon Department of Environmental Quality (DEQ).

In addition to closing previous loopholes, CAO evaluates potential air toxics health risks (for cancer and non-cancer health effects) to people living, working or going to school near industrial and commercial facilities, and reduces those risks to below action levels adopted in law or rules.

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Understanding Continuous Particulate Monitors

The U.S. Environmental Protection Agency (USEPA) defines particle pollution into two categories:

  • PM10 – Particulate matter with a diameter less than 10 microns,
  • PM2.5  – Particulate matter with a diameter less than 2.5 microns, also known as “fine particles.”

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