1. Mercury Transport to San Francisco Bay through the Sacramento-San Joaquin River Delta. Nicole David, Lester J. McKee, Jon E. Leatherbarrow December 15, 2005 Item #7

2. Sampling Event 2005 January 3 through 6, 2005

3. Sampling Event 2005 Max dayflow 58,000 cfs (Max dayflow so far 150,000 cfs)

4. Sampling Event 2005 Max HgT 13.89 ng/L

5. Relationship between total Hg and SSC

6. Relationship between total Hg and SSC influenced by salinity

7. Annual Mercury Loads Water YearFlow (Mm 3 )Sediment (Mt)Mercury (kg) 199551,5592.58±0.83399±136 199631,4361.01±0.32184±62 199742,3072.24±0.72351±119 199853,6392.42±0.77389±132 199927,8050.84±0.27156±53 200022,3940.66±0.21123±42 20018,5650.26±0.0852±18 200211,3030.31±0.1058±20 200317,3300.55±0.1797±33 200418,5770.64±0.20110±37 2005*14,2660.33±0.1164±22 Average27,1981.08±0.34180±61

8. Organic Contaminants *four samples collected in May 2003 had TPCB concentrations ranging from 890 – 6700 pg/L Item #7

9. Preliminary Loading Estimates Loads are preliminary and were estimated using Regression (REG) and Flow Weighted Mean Concentrations (FWMC). Preliminary estimates of errors are approximately ± 25%. PCBs PAHs FWMC 6 230 23 350 Item #7

10. Project Sampling Schedule WY 2006: Collect first flush data and sample storm event over 150,000 cfs WY 2007: Sample storm event over 150,000 cfs only* WY 2008: Sample storm event over 150,000 cfs only* WY 2009: Sample all floods * With RMP contingency money

11. Project Reporting Schedule 2006 Final Report: 2002–2005 data 2009 Report sampling results and reinterpret existing data Item #7