Documents from Previous SWQSAWG Meetings

On June 30, 2010, the Commission adopted revisions to the Standards and approved updated implementation procedures. See additional information regarding the revised 2010 Standards and implementation procedures.

On July 28, 2010, the Commission considered the following item related to the contact recreation uses and criteria:

• Options for Streamlining RUAA Procedures

Proposed Changes to Table 1 in the TSWQS

The table entitled, “ Proposed Changes to Table 1 in the TSWQS, 307.6 ,” lists the changes to the 2000 Standards version “Table 1, Criteria in Water for Specific Toxic Material Aquatic Life Protection.” The Proposed Changes table was created to address comments from the January 6, 2009, Work Group meeting. It provides information about why criteria changed for some substances and why some substances were added.

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April 27, 2009 Meeting

• Agenda (April 2009)
• Summary (April 2009, P.M. session)
• Attendee List (April 2009)
• Appendix F: Proposed Site-specific Nutrient Criteria for Selected Reservoirs
• Alternative Calculation of Chlorophyll a to Total Phosphorus Ratio
• Draft Nutrient Screening — Proposed
• Evaluation of Nutrient Criteria Development Using Only Recent Data
• Seven Years Data for Beta Testing of Assessment: Chlorophyll a and Total Phosphorus
• Status of Proposed Nutrient Criteria
• Comments (April 2009)

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January 7, 2009 Meeting

• Agenda (January 2009)
• Summary 01-06  ,  Summary 01-07
• Attendee List (January 2009)
• Procedures to Implement the Surface Water Quality Standards - DRAFT
• Summary of Significant Potential Changes to the Implementation Procedures (excluding WET) November 20, 2008
• Summary of Significant Potential Changes to the Implementation Procedures for Whole Effluent Toxicity January 7, 2009

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January 6, 2009 Meeting

• Attendee List (January 6 2009)
• Surface Water Quality Standards TAC 307
• Table 1 – Aquatic Life Protection
• Table 2 – Human Health Protection
• Table 3 – Aquatic Life Subcategories
• Table 4 – Critical Flow Values
• Overview of Proposed Standards Revisions 01/06/09
• Proposed Changes to Classified Water Bodies 01/06/09
• Draft Revisions to Recreation Criteria 01/06/09
• Final TCEQ Mercury Letter
• EPA Mercury Response Letter
•  Appendix A18  
• Appendix A – Site-specific Uses and Criteria for Classified Segments – Introduction
• Appendix B – Sole-source Surface Drinking Water Supplies
• Appendix C – Segment Descriptions
• Appendix D – Site-specific Uses and Criteria for Unclassified Water Bodies
• Appendix E – Site-specific Toxic Criteria
• Appendix F – Site-Specific Nutrient Criteria for Selected Reservoirs
• Draft Recreational UAA Procedures
• Abbreviated Nutrient Criteria Calculations
• Summary of Draft Appendix A Changes

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May 5, 2008 Meeting

• Agenda (May 2008)
• Summary (May 2008)
• Comments (May 2008)
• Chapter 307 Draft Rule Language
•  Table 1 in 307.6 – Aquatic life toxic criteria  
•  Table 2 in 307.6 – Human Health toxic criteria
• Appendix E – Site-Specific Criteria
• Appendix F – Nutrient Criteria
• Whole Effluent Toxicity (WET) Testing in the IPs
•  Table 3 – Aquatic Life Use Subcategories
• Table 4 – Critical Low Flow Values for DO in East Texas
• Segments with Seagrass Uses
• EPA Letter - Analytical Methods for Mercury in National Pollutant Discharge Elimination System (NPDES) Permits
• EPA Letter – Region 6 Minimum Quantification Level Guidance
• Minimum Analytical Levels and Suggested Methods for Permit Application Screening
• Analytical Methods for the Determination of Pollutants Regulated by Section 307.6 of Standards
• Water Quality Standards for Recreation: Options for Revision
• Whole Effluent Toxicity Basics - Current TCEQ Policy for May 5, 2008
• Whole Effluent Toxicity Testing: Revisions to Consider Standards Implementation Procedures for May 5, 2008
•  IP Springfed Streams

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September 6, 2007 Meeting

• Agenda (Sep 2007)
• Summary (Sep 2007)
•   Discussion Topics for 307.8: Standards Applicability (September 2007)
•   Discussion Topics for 307.9: Standards Attainment (September 2007)
•   Endangered Species Background Information
•   Background On The Development Of Water Quality Criteria For Nutrients
• Development of Nutrient Criteria in the Texas Surface Water Quality Standards (Criteria Formula)
•   Current Language Associated with Nutrients in the Standards and in Assessment Documents
•   Nutrients Database Development and Data Treatment
•   Nutrient Criteria for Reservoirs (Overview)
•   5 Year Assessment
•   Reservoir Trends and Exceedances
•  Assessment of Chlorophyll a for 0-10% Land Use Reservoirs
•  Assessment of Chlorophyll a for 10-20% Land Use Reservoirs
•  Assessment of Chlorophyll a for 20+% Land Use Reservoirs
•   Questions on Nutrient Criteria for Reservoirs  
•  Nutrient Criteria Development in Texas
•  Potential Changes to Sections 307.8 and 307.9: Standards Applicability and Attainment

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June 26, 2007 Meeting

• Agenda (June 2007)
• Summary (June 2007)
• Whole Effluent Toxicity (WET) Basics – Current TCEQ Policy
• WET EPA Permitting Strategy – Brief
• WET – Discussion Topics
• March 2005 TCEQ Letter
• March 2006 EPA Letter
• April 2006 TCEQ Letter
• April 2007 James Hanlon Memo to Miguel Flores
• May 2007 EPA Letter
• Questions for Small Breakout Group Discussions
• Notes on Revisions to Site-specific Standards
• Review of Site-specific Standards
• Notes for Appendix D
• Appendix D Entries
• Whole Effluent Toxicity (WET) Testing
• Waterbody Candidates
• Bacteria Data Summary
• Links to EPA documents for Whole Effluent Testing (WET)

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May 16, 2007 Meeting

• Agenda (May 2007)
• Summary (May 2007)
• Changes to §307.8-Application of Standards and §307.9-Determination of Standards Attainment
• Chapter 307.7 Recreational Uses and Criteria
• Revising Water Quality Standards for Water-Based Recreation
• Chlorophyll a, Total Phosphorus, Total Nitrogen
• Chlorophyll a Criteria
• Recreational Uses and Criteria: Options under Evaluation
• EPA Recreational Criteria Tables
• Options to Consider for Recreational Uses and Criteria
• Discussion Topics for 307.9: Standards Attainment
• Discussion Topics for 307.8: Standards Applicability

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March 7, 2007 Meeting

• Agenda (March 2007)
• Summary (March 2007)
• 2000 Standards Overview of EPA Approval and an Overview of the Next Standards Revision
• House Bill 3023: Special Designations
• Draft Sole-Source Surface Drinking Water Supplies
• Draft Nutrient Criteria Chlorophyll a, Total Phosphorus, Total Nitrogen
• Development of Nutrient Criteria in the Texas Surface Water Quality Standards
• Draft Chlorophyll a Criteria Reservoirs Least Impacted
• 10–15% Land Use
• 16–20% Land Use
• More Than 21% Land Use
• Draft Total Phosphorus Criteria
• Draft Total Nitrogen Criteria
• Potential Changes to 30 TAC Section 307.6
• EPA Requested Additions to Table 3
• Comparison of Existing Table 3 Values to Newly Calculated Human Health Criteria
• Table 1 – Draft Aquatic Life Criteria
• 2006 Proposed Table 3 Compared to NRWQC Criteria in Water for Specific Toxic Materials Human Health Protection
• Methylmercury Human Health Criteria
• Surface Water Quality Standards Web Links
• Summary of Preliminary Comments for Texas Surface Water Quality Standards
• Reservoir Nutrient Criteria – Texas Parks and Wildlife Department