8.18.2021 EPA Finalizes Hazard Assessments for Two Fuel Additives (ETBE and tert-Butanol):

On August 18th, EPA finalized the long-awaited hazard assessments for both Ethyl Tertiary Butyl Ether (ETBE) and tert-Butyl Alcohol (tert-Butanol).  ETBE was previously added to gasoline to increase its octane levels. It is still registered with EPA for use as a fuel additive, but it is not used currently in the United States.  tert-Butanol is one of the primary metabolites of ETBE and has also been used as a fuel oxygenate. It is also used for other purposes including as a solvent and as a dehydrating agent.
Continue Reading ICYMI: EPA’s IRIS Program is Ramping up its Activity for chemicals, including PFAS; EPA’s TSCA Program Releases Guidance for Exemptions to CDR Reporting

On November 9, 2020, EPA’s Office of Research and Development (ORD) released its long-awaited draft handbook that details the office’s process for developing chemical hazard assessments for its Integrated Risk Information System (IRIS) Program. The ORD Staff Handbook for Developing IRIS Assessments (IRIS Handbook) gives useful insight into ORD’s process to develop its IRIS assessments, which provide important toxicological information that federal and state environmental agencies consider when making regulatory and cleanup decisions under multiple statutory programs. EPA will accept comments on the draft handbook and charge questions until March 1, 2021.

Continue Reading EPA Releases Long-Awaited IRIS Handbook, But has Anything Changed?