On April 24, 2018, EPA released for public comment a supplemental analysis on the definitions of small business size and their effect on Toxic Substances Control Act (TSCA) user fee collection. In the proposed fees rule EPA released in February, small businesses can quality for reduced fee amounts. For the supplemental analysis, EPA requested comment on:

EPA is also extending the comment period for the proposed TSCA fees rule until May 24, 2018. This is meant to give interested parties more time to comment on both the rule and the supplemental analysis.