San Joaquin River Stockton Deep Water Ship Channel Dissolved Oxygen TMDL

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San Joaquin River Stockton Deep Water Ship
Channel Dissolved Oxygen TMDL

• What is a TMDL?
• San Joaquin River DO TMDL Overview
• TMDL Control Program Phase II MS4 Permit
• Sue McConnell (Senior WRCE) [phone]
• Christine Joab (Environmental Scientist) (916)
  464-4655

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What is a TMDL?

• Waters not meeting water quality standards
  (objectives)
• Impaired water bodies list
• TMDL Planning and Management Tool
• Identify, quantify and control sources
• Implement Control Program (actions, time
  schedule, monitoring)
• Regulatory Programs
• NPDES Permits (Municipal, Industrial Storm
  Water)
• Waste Discharge Requirements (WDRs)
• 401 Water Quality Certifications
• Technical and Monitoring Report Requirements

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Impaired Reach of the San Joaquin River
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TMDL Source Area
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TMDL Sources

• TMDL Studies - 3 Contributing Factors
• Channel Geometry
• Flow through the Channel
• Upstream Oxygen Demanding Substances
• City of Stockton WWTP discharges
• Algae and nutrients from upstream watershed
• Other upstream point sources (includes NPDES
  Storm Water)

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TMDL Control Program Actions

• Contributors collectively responsible
• Work together to implement TMDL
• Actions Implemented within Watershed
• Stockton WWTP upgrade
• Aeration Facility operation
• Watershed studies and new WDRs for Ag
• Phase II MS4 TMDL Implementation
• Minimize, control and prevent discharge
• Annual Report submittal