Audit, Compliance and Risk Blog

Radon gas is released naturally by radioactive decay within rock formations, from where it can percolate to the surface and infiltrate basement and trenching, and then produce hazardous concentrations if trapped or spread throughout the structure by the ventilation system. Because of its radioactive origin, radon can pose health risks – it’s the leading cause of lung cancer in non-smokers. The US Environmental Protection Agency (EPA) administers extensive information programs, which encourage in-building testing (especially in housing), and provides guidance for hazard reduction. EPA’s authority derives primarily from the Indoor Radon Abatement Act of 1988 (codified as Title III of the Toxic Substances Control Act (TSCA)). In addition, the Occupational Safety and Health Administration (OSHA) considers radon a type of ionizing radiation subject to worker protection requirements. The remainder of this note provides background to radon hazards and their management, referencing information from EPA, OSHA and other agencies and professional organizations. 

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The 2016 amendments to the Toxic Substances Control Act (TSCA) added procedures for the Environmental Protection Agency (EPA) to evaluate risks presented by existing chemicals using the latest scientific information – including information developed after a chemical entered use in the US. Based on these reviews, EPA is to update its regulatory requirements, ranging from labeling-only through use restrictions up to and including bans from further distribution and use. (I summarized these review requirements HERE ).  Beginning in November 2019, EPA regularly announces new chemical reviews, and subsequently the results of these reviews. (I wrote about the first review announcement HERE ). On July 25, 2024 EPA published a formal proposal to review 5 additional chemicals for designation as High-Priority Substance subject to strict controls under TSCA. The rest of this note identifies these proposed chemicals.

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The federal Superfund law (Comprehensive Environmental Response, Compensation, and Liability Act (CERCLA) of 1980) defines broad categories of parties who might be deemed responsible for chemical contamination (“responsible parties”) and liable to pay for some or all the costs o cleaning up. Nearly 45 years after CERCLA was first enacted, a federal Court of Appeals has confirmed for the first time that a party that “arranges for” disposal can be liable for cleanup costs

, even if there’s no evidence that the party knew that the materials being disposed were hazardous. Although this ruling is consistent with the statutory text and decades of practice, it’s still the first formal ruling by an Appeals court (68^th Street Site Work Group v. Alban Tractor Co.). The rest of this note summarizes “arranger-for” liability, and this case.

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Since the 1980s, the Occupational Safety and Health Administration (OSHA) has required most employers to protect their workers from workplace chemical hazards, and to train workers to protect themselves.  Most employers are subject to OSHA’s Hazard Communication Standard (HCS; 29 CFR 1910.1200), or to variants imposed by states delegated OSHA’s authority. Many of the present requirements were established by massive revisions adopted in March 2012, when OSHA recast HCS to align it with the United Nations-sponsored Globally Harmonized System of Classification and Labeling of Chemicals (GHS).  OSHA’s 2012 revisions conformed the US to GHS Revision 3, which was issued internationally in 2002.  The most obvious change was the adoption of Safety Data Sheets (SDSs) to replace longstanding Material Safety Data Sheets (MSDSs), but employers faced a series of deadlines during 2013-2016. 

On May 20, 2024, OSHA significantly updated HCS requirements for the first time since 2012, primarily to reflect GHS changes through Revision 7 (which was published in 2017). OSHA’s revisions take effect on July 19. The remainder of this note summarizes these changes, based on the affected subsections or appendices.

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