Procedures to Implement the Texas Surface Water Quality Standards Peter Schaefer Standards...
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![Page 1: Procedures to Implement the Texas Surface Water Quality Standards Peter Schaefer Standards Implementation Team 512-239-4372peter.schaefer@tceq.texas.gov.](https://reader035.fdocuments.in/reader035/viewer/2022062315/5697c0251a28abf838cd569c/html5/thumbnails/1.jpg)
Procedures to Implement the Texas Surface Water
Quality Standards
Peter SchaeferStandards Implementation
Team 512-239-4372
![Page 2: Procedures to Implement the Texas Surface Water Quality Standards Peter Schaefer Standards Implementation Team 512-239-4372peter.schaefer@tceq.texas.gov.](https://reader035.fdocuments.in/reader035/viewer/2022062315/5697c0251a28abf838cd569c/html5/thumbnails/2.jpg)
What are “Implementation Procedures (IPs)”
Procedures to Implement the Texas Surface Water Quality Standards (IPs) RG-194
A guidance document that explains how TCEQ applies the Texas Surface Water Quality Standards
![Page 3: Procedures to Implement the Texas Surface Water Quality Standards Peter Schaefer Standards Implementation Team 512-239-4372peter.schaefer@tceq.texas.gov.](https://reader035.fdocuments.in/reader035/viewer/2022062315/5697c0251a28abf838cd569c/html5/thumbnails/3.jpg)
IP Revision process
• Triennial review process
• 2010 IPs approved at the June 30, 2010 TCEQ Commissioner’s Agenda
• EPA approved most of the 2010 IPs on July 12, 2013
• Next water quality standards revision: 2017
• Next IPs revision also targeting 2017
![Page 4: Procedures to Implement the Texas Surface Water Quality Standards Peter Schaefer Standards Implementation Team 512-239-4372peter.schaefer@tceq.texas.gov.](https://reader035.fdocuments.in/reader035/viewer/2022062315/5697c0251a28abf838cd569c/html5/thumbnails/4.jpg)
Unresolved EPA Objections to 2010 IPs:
• Dechlorination • Variances
• Whole Effluent
Toxicity
![Page 5: Procedures to Implement the Texas Surface Water Quality Standards Peter Schaefer Standards Implementation Team 512-239-4372peter.schaefer@tceq.texas.gov.](https://reader035.fdocuments.in/reader035/viewer/2022062315/5697c0251a28abf838cd569c/html5/thumbnails/5.jpg)
Focus of 2017 IP Revisions• Updates to dechlorination requirements for
minor municipal discharges• Variances• Reasonable Potential for WET Testing• Temperature • Ambient WQ data updates• Industrial cooling water impoundments
definitions• Updates to endangered species• 316(b) rule implementation• Updates to MALs• Correcting errors/ommissions in current IPs
![Page 6: Procedures to Implement the Texas Surface Water Quality Standards Peter Schaefer Standards Implementation Team 512-239-4372peter.schaefer@tceq.texas.gov.](https://reader035.fdocuments.in/reader035/viewer/2022062315/5697c0251a28abf838cd569c/html5/thumbnails/6.jpg)
Dechlorination
IPs propose dechlorinationrequirements for renewing,
new, and expanding domestic discharges with design flows between 0.5 and 1.0 MGD
![Page 7: Procedures to Implement the Texas Surface Water Quality Standards Peter Schaefer Standards Implementation Team 512-239-4372peter.schaefer@tceq.texas.gov.](https://reader035.fdocuments.in/reader035/viewer/2022062315/5697c0251a28abf838cd569c/html5/thumbnails/7.jpg)
Variances
IPs address site specific standards and variances.
EPA objection -specific date for compliance with final effluent
limits
![Page 8: Procedures to Implement the Texas Surface Water Quality Standards Peter Schaefer Standards Implementation Team 512-239-4372peter.schaefer@tceq.texas.gov.](https://reader035.fdocuments.in/reader035/viewer/2022062315/5697c0251a28abf838cd569c/html5/thumbnails/8.jpg)
Biomonitoring Review
• Focused on “WET”-Whole Effluent Toxicity
• Exposure of invertebrate and vertebrate species to predict impacts to aquatic life (lethal and sublethal)
• Uses the most recent 5 years of testing, determines reasonable potential
• Formulates language, and “Toxicity limits”
![Page 9: Procedures to Implement the Texas Surface Water Quality Standards Peter Schaefer Standards Implementation Team 512-239-4372peter.schaefer@tceq.texas.gov.](https://reader035.fdocuments.in/reader035/viewer/2022062315/5697c0251a28abf838cd569c/html5/thumbnails/9.jpg)
EPA Objection to 2010 IPs
•EPA wants Reasonable Potential determination process for WET limits within IPs
•Ongoing discussions with EPA to come to agreement
![Page 10: Procedures to Implement the Texas Surface Water Quality Standards Peter Schaefer Standards Implementation Team 512-239-4372peter.schaefer@tceq.texas.gov.](https://reader035.fdocuments.in/reader035/viewer/2022062315/5697c0251a28abf838cd569c/html5/thumbnails/10.jpg)
Toxicity Reduction Evaluations
• TREs are now voluntary. Although no longer
• mandatory, they are strongly encouraged.
• A successful TRE is dependent upon a defining
• reasonable potential to assure that sublethal toxicity is
• persistent and significant.
![Page 11: Procedures to Implement the Texas Surface Water Quality Standards Peter Schaefer Standards Implementation Team 512-239-4372peter.schaefer@tceq.texas.gov.](https://reader035.fdocuments.in/reader035/viewer/2022062315/5697c0251a28abf838cd569c/html5/thumbnails/11.jpg)
Temperature
• Temperature screening stakeholder group started in August 2014
• TCEQ is taking initial comments and working on detailed procedures for inclusion in the IPs
• Draft procedures to be presented to stakeholders in summer 2016
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Temperature RP analysis
• Heat balance equation
• Numerical model calculations (ex. Cormix)
• Highly site-specific technical analysis
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Ambient Water Quality Data
• Routine water quality data is analyzed to derive segment-specific values
• TSS, pH, hardness, TDS, chloride, sulfate
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316(b)-Intake Structures
• EPA’s final rule for existing facilities became effective October 14, 2014
• TCEQ working with EPA and permittees on application/information requirements and implementation issues
• Court challenges still pending
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Endangered Species
•New listings
•De-listings
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MAL’s
Changes to Minimum Analytical Levels (MALs) -
now in effect
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Nutrients 2010 IPs
• Streams and Rivers- narrative
• Lakes – numeric and narrativelocal effects in reservoirsmain body
• Bays and Estuaries
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Nutrient Screening
• Phytoplankton in open water
• Attached algae; floating algae
• Rooted vegetation
• Aesthetic effects on recreation
• Water supplies: THM, taste & odor
• Aquatic-life: fisheries ↑↓ habitat ↑↓
• DO at night↓ diversity↓
![Page 19: Procedures to Implement the Texas Surface Water Quality Standards Peter Schaefer Standards Implementation Team 512-239-4372peter.schaefer@tceq.texas.gov.](https://reader035.fdocuments.in/reader035/viewer/2022062315/5697c0251a28abf838cd569c/html5/thumbnails/19.jpg)
IPs – Nutrient Narrative Criteria
30 TAC Chapter 307.4(e):
“Nutrients … shall not cause excessive growth of aquatic vegetation which impair an
existing, attainable, or designated use.”
![Page 20: Procedures to Implement the Texas Surface Water Quality Standards Peter Schaefer Standards Implementation Team 512-239-4372peter.schaefer@tceq.texas.gov.](https://reader035.fdocuments.in/reader035/viewer/2022062315/5697c0251a28abf838cd569c/html5/thumbnails/20.jpg)
Nutrients – Typical TP Limits
Permitted Flow (MGD) TP Limit (mg/L)
< 0.5 1.0
0.5 – 3.0 1.0 – 0.5
> 3.0 0.5
Site specific- 0.15 mg/L TP limits
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Nutrients – Nitrogen Limitations
• TN limitations to prevent potential impact to sea grass communities.
• Consideration of site specific conditions influencing dispersion and discharge volume in relation to the proximity of sea grasses to outfall.
• In the absence of numeric criteria, nitrogen limit recommendations are based on Best Professional Judgment (BPJ) and available site specific data.
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Reservoir Criteria• Criteria were
proposed for 75 reservoirs
• EPA approved about half of the criteria proposed
• How does that affect me??
![Page 23: Procedures to Implement the Texas Surface Water Quality Standards Peter Schaefer Standards Implementation Team 512-239-4372peter.schaefer@tceq.texas.gov.](https://reader035.fdocuments.in/reader035/viewer/2022062315/5697c0251a28abf838cd569c/html5/thumbnails/23.jpg)
pH Screening Procedures
• Screening procedure established with EPA concurrence for certain direct discharges to classified segments
• pH Sceening conducted: • for major municipal
facilities (≥1 MGD flow)
• for industrial discharges
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IP Revisions• Update Segment ambient WQ
data
• Temperature – cooling water
• WET -RP analysis
• Decholorination
• pH Objections
• Variances
• Endangered species
• MALs
• 316(b) rule implementation
• General updates
![Page 25: Procedures to Implement the Texas Surface Water Quality Standards Peter Schaefer Standards Implementation Team 512-239-4372peter.schaefer@tceq.texas.gov.](https://reader035.fdocuments.in/reader035/viewer/2022062315/5697c0251a28abf838cd569c/html5/thumbnails/25.jpg)
Any
Questions
???