1.  What is a TMDL?  San Joaquin River DO TMDL Overview  TMDL Control Program & Phase II MS4 Permit Sue McConnell (Senior WRCE) (916) 464-4798 Christine Joab (Environmental Scientist) (916) 464-4655 Phase II MS4 SJR DO TMDL 22 Jan 2014 1

2.  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 Phase II MS4 SJR DO TMDL 22 Jan 2014 2

3. 3 Port of Stockton Impaired Reach Turner Cut Disappointment Slough

4. Phase II MS4 SJR DO TMDL 22 Jan 2014 4 DO TMDL Source Area Impaired Reach of the DWSC San Joaquin River Friant Dam Mendota Pool

5.  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) Phase II MS4 SJR DO TMDL 22 Jan 2014 5

6.  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 Phase II MS4 SJR DO TMDL 22 Jan 2014 6