30 TAC Chapter 307 Texas Surface Water Quality Standards Workgroup meeting March 7, 2007

2000 Standards EPA Decisions Disapproved Sam Rayburn – DO Selenium WER Dixon Creek Caney Creek, Linville Bayou No Action Surface waters in the state Fecal coliform for effluent limits Bacteria criteria for Red River Appendix B

2000 Standards EPA Approved Appendix D Appendix C segment boundaries App E Cu, Zn, Al WERs Saltwater Aq criteria – Table 1 Human Health criteria – Table 3 307.6 toxic materials 307.3 definitions Implement WERs in permits once EPA approves Nueces River Tidal DO Appendix A New segments Aquifer protection Dissolved minerals pH changes E. coli & Enterococcus

2000 standards Under EPA Review Freshwater aquatic toxic criteria 307.4 General Criteria – text 307.7 Table 5 – app to Classified waters Wetland functions & seagrass use 307.8 – Application of Standards 307.9 – Determination of Standards Attainment 307.10 – temp in Comal River

Next Standards Management approval to begin rule process Working internally, team and agency e-comments List server

Workgroups Today Next group Nutrient criteria for reservoirs Toxic criteria Next group Bacteria 307.9 – Determination of Standards Attainment

What we are working on Whole-effluent toxicity (WET) Sole Source Drinking Water Definitions Seagrass use Segment boundaries – ex. Caddo Site-specific changes on segments Salado Creek Caney Creek Clear Fork Trinity River West Fork Trinity River Little Wichita Black Bayou Dixon Creek Slaughter Creek

Appendix E – 15 water bodies – WER Appendix D - ~95 streams Appendix E – 15 water bodies – WER EPA recommendation – chlorine removal Bacteria Evaluate existing recreational standards & assessment procedures Broader range of uses

Timeline Draft timeline Management approval Dec 2006 1st stakeholder meeting Mar 2007 Final rule to rule team Jan 2008 Proposed Agenda Mar 2008 Adoption by Commission Sept 2008