84 FR 50833
EPA designated a new reference method for measuring concentrations of nitrogen dioxide and amended an existing reference method for measuring coarse particulate matter in ambient air.
EPA designated a new reference method for measuring concentrations of nitrogen dioxide and amended an existing reference method for measuring coarse particulate matter in ambient air.
EPA designated one new equivalent method for measuring concentrations of ozone in ambient air.
EPA announced its designation of a new equivalent method for measuring concentrations of ozone in ambient air.
The Department of Environmental Protection seeks comment on Pennsylvania's 2018 Annual Ambient Air Monitoring Network Plan, which has been updated to address changes made in the Commonwealth's ambient air monitoring network and identify changes anticipated to occur in the remainder of 2018 and in 2019. Comments are due July 16, 2018. See https://www.pabulletin.com/secure/data/vol48/48-24/932.html.