1. River Loads The Mallard Island Study Nicole David, John Oram, Lester McKee, SFEI Russ Flegal, UCSC

2. Sampling Location

3. Sampling

4. Hg v SSC (all data)

5. Influence of Salinity

6. Suspended Sediment and Hg Loads

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

8. 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%. PCBsPAHs FWMC 6230 23350

9. Project Schedule Summer/Fall 2005: $51k - Write Final report for data collected during WYs 2002, 2003, 2004, and 2005 WY 2006: $60k - Collect wet season first flush data and update report WY 2007: $0k - Use RMP contingency funds if necessary to sample a large flood WY 2008: $0k - Use RMP contingency funds if necessary to sample a large flood WY 2009: $120k – Sample and report on all floods for the season in addition to reinterpreting the first 8 years of chemical data and 15 years of suspended sediment data