Summary

EPA Signs Explanation of Significant Differences

The U.S. Environmental Protection Agency (EPA) Region 7 has issued an Explanation of Significant Differences (ESD) for the Lawrence Todtz Farm Superfund Site. Under the Superfund law, EPA issues an ESD for a site cleanup change that differs from the original decision document but does not alter the overall remedy. This ESD memorializes a decision to update the health-based standards at the site to reflect current understanding where it has changed since the 1988 Record of Decision. Also, EPA is updating the action levels to reflect these updated health-based standards.

EPA issued a proposed ESD to provide an opportunity for the public to provide comments on the proposed changes. A 30-day public comment period began June 23, 2020, and ended July 23, 2020. Comments received are addressed in the Responsiveness Summary portion of the ESD.

EPA has assessed the ability of the public to access the proposed ESD through an internet-based repository and has determined that the local community has this ability. The Administrative Record for this site will be available online for anyone with an internet connection. For additional site information, please visit the EPA’s website (see Site Documents & Data).

Questions, comments, or requests for site information can be submitted to: