Pollutant Loads to the Bay Measuring the L

Pollutant Loads to the Bay: Measuring the “L” in TMDL Lester Mc. Kee Sources Pathways and Loadings Workgroup and Watershed Program Manager SFEI RMP Annual Meeting, May 10 th 2005

SPLWG Achievements n 13 technical reports over the past 5 years including reports on urban drainage, atmospheric inputs, and sediment loads n Developed conceptual models and designed evaluation strategies for monitoring Hg, PCBs and OC pesticides in stormwater runoff n Implemented stormwater monitoring studies at Mallard Is. and Guadalupe R. n SPLWG - The leading source of loads information n Forum for discussion RMP Annual Meeting 2005

SPLWG - Systematic Plan Davis et al. , 1999, 2000 A. Watershed Characterization B. Conceptual Model Development C. Develop Evaluation Strategies D. Establish Regional Network of “Observation Watersheds” E. Extrapolate to Other Watersheds RMP Annual Meeting 2005

The Pathways of “L”… n Loads enter the Bay from 5 main pathways: 1 2000 2005 1. Urban stormwater 2 2. New Almaden mining area 3 3. Atmospheric deposition 5 4. Urban and industrial wastewater 5. Large Rivers Total Mercury Inputs 1 2 4 3 RMP Annual Meeting 2005

Why Else Study Loads? n Improve understanding of variation (both spatial and temporal) n Estimate loads in unmeasured places (extrapolation and modeling) n Measure change over time in relation to management activities RMP Annual Meeting 2005

Recent SPLWG Highlights n Completed technical reports on the Mallard Is. and Guadalupe River field studies n Submitted three papers to scientific journals n Began discussions on how to choose a location for another small tributaries loading study n Received 6 special and pilot studies proposals n Initiated the development of a new 5 -year work plan RMP Annual Meeting 2005

Special and Pilot Studies Proposals #1: Small Tributaries Loading study (number two) #2: Design of a watershed RMP #3: Improving Bay Area hydrography for characterization and modeling stormwater flow #4: Storm drain outfall sediment characterization #5: Determining the ability for loadings studies to observe change #6: Enhanced isohyetal analysis of the SF Bay Area RMP Annual Meeting 2005

SPLWG 5 -Yr Work Plan (2005 -09) RMP Annual Meeting 2005

SPLWG 5 -Yr Work Plan (2005 -09) Activity Funding Sources 2005 A S 2006 A S 2007 A S 2008 A S 2009 A S Workgroup meetings and external coordination RMP $22 k Mallard Island Large River Loadings Study RMP $51 k $60 k Contingency Guadalupe Small Tributaries Loadings Study CEP, RMP, USACE, SCVURPPP $173 k $50 k ? ? ? Reconnaissance Survey of Loading Study Sites RMP $7. 5 k Additional small tributaries loadings studies ? ? ? ? ? Extrapolations / regional loading estimates ? ? ? ? Development of the next fiveyear plan RMP In-kind $22 k $120 k RMP Annual Meeting 2005 $10 k

SPLWG 5 -Yr Work Plan (2005 -09) Activity Funding Sources 2005 A S 2006 A S 2007 A S 2008 A S 2009 A S Workgroup meetings and external coordination RMP $22 k Mallard Island Large River Loadings Study RMP $51 k $60 k Contingency Guadalupe Small Tributaries Loadings Study CEP, RMP, USACE, SCVURPPP $173 k $50 k ? ? ? Reconnaissance Survey of Loading Study Sites RMP $7. 5 k Additional small tributaries loadings studies ? ? ? ? ? Extrapolations / regional loading estimates ? ? ? ? Development of the next fiveyear plan RMP In-kind $22 k $120 k RMP Annual Meeting 2005 $10 k

SPLWG 5 -Yr Work Plan (2005 -09) Activity Funding Sources 2005 A S 2006 A S 2007 A S 2008 A S 2009 A S Workgroup meetings and external coordination RMP $22 k Mallard Island Large River Loadings Study RMP $51 k $60 k Contingency Guadalupe Small Tributaries Loadings Study CEP, RMP, USACE, SCVURPPP $173 k $50 k ? ? ? Reconnaissance Survey of Loading Study Sites RMP $7. 5 k Additional small tributaries loadings studies ? ? ? ? ? Extrapolations / regional loading estimates ? ? ? ? Development of the next fiveyear plan RMP In-kind $22 k $120 k RMP Annual Meeting 2005 $10 k

SPLWG 5 -Yr Work Plan (2005 -09) Activity Funding Sources 2005 A S 2006 A S 2007 A S 2008 A S 2009 A S Workgroup meetings and external coordination RMP $22 k Mallard Island Large River Loadings Study RMP $51 k $60 k Contingency Guadalupe Small Tributaries Loadings Study CEP, RMP, USACE, SCVURPPP $173 k $50 k ? ? ? Reconnaissance Survey of Loading Study Sites RMP $7. 5 k Additional small tributaries loadings studies ? ? ? ? ? Extrapolations / regional loading estimates ? ? ? ? Development of the next fiveyear plan RMP In-kind $22 k $120 k RMP Annual Meeting 2005 $10 k

SPLWG 5 -Yr Work Plan (2005 -09) Activity Funding Sources 2005 A S 2006 A S 2007 A S 2008 A S 2009 A S Workgroup meetings and external coordination RMP $22 k Mallard Island Large River Loadings Study RMP $51 k $60 k Contingency Guadalupe Small Tributaries Loadings Study CEP, RMP, USACE, SCVURPPP $173 k $50 k ? ? ? Reconnaissance Survey of Loading Study Sites RMP $7. 5 k Additional small tributaries loadings studies ? ? ? ? ? Extrapolations / regional loading estimates ? ? ? ? Development of the next fiveyear plan RMP In-kind $22 k $120 k RMP Annual Meeting 2005 $10 k

SPLWG 5 -Yr Work Plan (2005 -09) Activity Funding Sources 2005 A S 2006 A S 2007 A S 2008 A S 2009 A S Workgroup meetings and external coordination RMP $22 k Mallard Island Large River Loadings Study RMP $51 k $60 k Contingency Guadalupe Small Tributaries Loadings Study CEP, RMP, USACE, SCVURPPP $173 k $50 k ? ? ? Reconnaissance Survey of Loading Study Sites RMP $7. 5 k Additional small tributaries loadings studies ? ? ? ? ? Extrapolations / regional loading estimates ? ? ? ? Development of the next fiveyear plan RMP In-kind $22 k $120 k RMP Annual Meeting 2005 $10 k

SPLWG 5 -Yr Work Plan (2005 -09) Activity Funding Sources 2005 A S 2006 A S 2007 A S 2008 A S 2009 A S Workgroup meetings and external coordination RMP $22 k Mallard Island Large River Loadings Study RMP $51 k $60 k Contingency Guadalupe Small Tributaries Loadings Study CEP, RMP, USACE, SCVURPPP $173 k $50 k ? ? ? Reconnaissance Survey of Loading Study Sites RMP $7. 5 k Additional small tributaries loadings studies ? ? ? ? ? Extrapolations / regional loading estimates ? ? ? ? Development of the next fiveyear plan RMP In-kind $22 k $120 k RMP Annual Meeting 2005 $10 k

Next Steps and Philosophy n Receive written comments on the draft work plan n Revise work plan to reflect oral and written comments n Systemically update the work plan as new information is generated (i. e. a living document) RMP Annual Meeting 2005

Field Studies WY 2005 Highlights n Mallard Island Large Rivers Loading Study n Guadalupe River Small Tributaries Loading Study

“The Mallard Island Study” Funding: RMP n SFEI: Management/sampling assistance/report n USGS SSC/turbidity data collection n RWQCB X-section variability n UCSC Sample collection/Hg and SSC analysis n AXYS Organic contaminant analysis RMP Annual Meeting 2005

“The Mallard Island Study” Location Map RMP Annual Meeting 2005

Suspended Sediment Loads 1. 15 Mt RMP Annual Meeting 2005

Sampling for Trace Contaminants RMP Annual Meeting 2005

Total Mercury Loads RMP Annual Meeting 2005

Total Mercury Loads 191 kg RMP Annual Meeting 2005

PCB Loads RMP Annual Meeting 2005

“The Guadalupe Small Tributaries Loads Study” Funding: RMP, CEP, USACE/SCVWD, SCVURPPP n SFEI Management/trace contaminant sampling/report n USGS Suspended sediment and bed loads n MLML Trace element analysis of water and sediment n AXYS Organic contaminant analysis RMP Annual Meeting 2005

“The Guadalupe Small Tributaries Loads Study” n SFEI WY 2005 field team Nicole David n Jennifer Hayworth n Jennifer Hunt n Kristen Larned n Jon Leatherbarrow n Aroon Melwani n Sarah Pearce n 51% Samples collected outside of work time

“The Guadalupe Small Tributaries Loads Study” Location Map RMP Annual Meeting 2005

Suspended Sediment Load Preliminary RMP Annual Meeting 2005

Sampling for Trace Contaminants RMP Annual Meeting 2005

Total Mercury Loads Max annual: 900 – 1, 100 kg 5 -yr mean: 6 – 440 kg RMP Annual Meeting 2005

PCB Loads RMP Annual Meeting 2005

Closing Comments n SPLWG efforts over the past 5 years had a profound influence our perceptions of Bay functions n This emerging understanding has strongly influenced the development of the mercury and PCB TMDLs n To complete the circle, the TMDL recommendations are now influencing the planning process for new SPLWG studies n Without the dedicated field team at SFEI, much of this information would not have been generated RMP Annual Meeting 2005