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Sen. David Vitter (R-LA) is highlighting language on structuring how and when EPA chemical safety rules would preempt those established by states as a key tenet of the final bill to reform the Toxic Substances Control Act (TSCA), following years of negotiations on the contentious issue that blocked previous efforts at TSCA reform.

House oversight panel member Paul Gosar (R-AZ) says several recent EPA personnel decisions such as disciplinary proceedings that it took since acting Deputy Administrator Stan Meiburg was nominated to that position could be undermined if the administration loses a court case over the legitimacy of acting officials.

EPA is poised to this month complete a peer review of how to incorporate a study on monetized benefits of reducing ozone-related mortality due to cutting methane emissions into regulatory analyses, which advocates say might help EPA use data from its draft information request for existing oil and gas operations in order to calculate benefits of a potential methane rule for those sources.

EPA is receiving conflicting comments on its draft risk review of certain exposures to the solvent 1-bromopropane (1-BP) with environmentalists and some states urging EPA to consider additional risks and exposures, while the chemical industry is arguing the review is a screening level assessment that should not be the basis of regulation.

EPA is proposing to add the flame retardant chemical hexabromocyclododecane (HBCD) to its list of chemicals whose releases must be reported to the agency annually under its Toxics Release Inventory (TRI), and is seeking to add the chemical to a “list of chemicals of special concern” that imposes stricter reporting requirements.

EPA's phase 2 greenhouse gas rule for trucks, slated for release this summer, is expected to include a non-binding commitment to craft a related national standard to prevent an increase in nitrogen oxide (NOx) emissions that may result from deployment of GHG controls, sources say, though a Los Angeles-area air district is poised next week to formally petition the agency to issue the NOx standard.

Members of EPA's Clean Air Scientific Advisory Committee (CASAC) particulate matter review panel are urging EPA to consider a wider range of issues and data than proposed so far when it reviews the current national ambient air quality standards (NAAQS) for fine particulate matter (PM2.5) and larger coarse particulate matter (PM10).