Toxic Substances Control Act (TSCA) Science Advisory Committee on Chemicals (SACC) - Review of Risk Evaluation for 1, 4 Dioxane

Comments submitted by Richard Denison, Ph.D., Lead Senior Scientist, on behalf of Environmental Defense Fund. Please find two files comprising our comments: #1: EDF's comments on EPA's Supplemental Analysis #2: NGO request for an extension of the comment period submitted to EPA on Nov. 23, 2020

Filed on regulations.gov — full text not in the inline record.

Attached please find comments submitted by Stephanie Schwarz, Legal Fellow, on behalf of Environmental Defense Fund (EDF) on EPA's Draft Risk Evaluation for 1,4-dioxane. In addition to our comments, EDF is submitting the following appendices and prior comments: Appendix I: EDF's blog posts on workers Appendix II: FracFocus data Appendix III: FracFocus reports Appendix IV: UCMR 3 Appendix V: Superfund list Appendix VI: Petitioners' Opening Brief challenging EPAs Prioritization and Risk Evaluation Rules Appendix VII: Petitioners' Reply Brief challenging EPAs Prioritization and Risk Evaluation Rules EDF's Comments on the Ten Scopes under the Toxic Substances Control Act, submitted September 19, 2017

Please find attached comments submitted by Richard A. Denison, Ph.D., Lead Senior Scientist, on behalf of Environmental Defense Fund. EDF is submitting three documents: 1. New comments on the draft risk evaluation for the SACC's consideration. 2. Appendix A cited in our new comments. 3. EDF's previously submitted comments on the problem formulations for the first 10 chemicals undergoing risk evaluations under TSCA. In order to assist the SACC in identifying those comments specific to 1,4-dioxane, we have attached a cover sheet that identifies each concern and the sections and page numbers where we address that concern in the full set of comments.