TX185 Texas Dallas-Fort Worth Area 2008 Eight-Hour Ozone Attainment Demonstration State Implementation Plan for the 2017 Attainment Year, Texas Project No. 2015-014-SIP-NR, submitted to EPA August 5, 2016 (TX-387, SIP)

The Sierra Club, Downwinders at Risk, and Center for Biological Diversity (the Conservation Groups) submit these comments on the U.S. Environmental Protection Agencys (EPAs) Proposed Approval and Promulgation of Implementation Plans; Texas; Attainment Demonstration for the Dallas/Fort Worth 2008 Ozone Nonattainment Area, 83 Fed. Reg. 19,483 (May 3, 2018), EPA Docket No. EPAR06OAR20160476; FRL997701Region 6. On June 1, 2018, the Conservation Organizations also submitted to EPA via UPS Mail Service modeling files on an external hard drive. If you have any questions or we can provide additional information, please do not hesitate to contact us. Joshua Smith Staff Attorney Sierra Club 2101 Webster Street, Suite 1300 Oakland, CA 94612 joshua.smith@sierraclub.org (415) 977-5560

On behalf of Sierra Club, the Center for Biological Diversity, and Downwinders at Risk (Conservation Organizations), I respectfully request that the U.S. Environmental Protection Agency (EPA) provide stakeholders with an additional 30 days to comment on EPAs proposed approval of Texass attainment demonstration for the Dallas/Fort Worth 2008 Ozone Nonattainment Area, EPA Docket No. EPA-R06-OAR-2016-0476; FRL-9977-01-Region 6; 83 Fed. Reg. 19,484 (May 3, 2018). A 30-day extension would result in a new comment deadline of July 4, 2018.