Transcript www.tceq.state.tx.us

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
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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
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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
– Nutrient criteria for reservoirs
– Toxic criteria
• Next group
– Bacteria
– 307.9 – Determination of Standards
Attainment
What we are working on
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Whole-effluent toxicity (WET)
Sole Source Drinking Water
Definitions
Seagrass use
Segment boundaries – ex. Caddo
Site-specific changes on segments
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Salado Creek
Caney Creek
Clear Fork Trinity River
West Fork Trinity River
Little Wichita
Black Bayou
Dixon Creek
Slaughter Creek
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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
– 1st stakeholder meeting
– Final rule to rule team
– Proposed Agenda
– Adoption by Commission
Dec 2006
Mar 2007
Jan 2008
Mar 2008
Sept 2008