1. Guadalupe River Small Tributaries Loading Study: Do we continue? If so How!! Lester McKee San Francisco Estuary Institute, Oakland, CA San Francisco Estuary Institute Item #3b

2. Sediment Load Variability in the Bay Area

3. Guadalupe sediment load variation predicted to be 2,300x

4. Rainfall Intensity Hypothesis Hg (mg/kg)

5. Measured Hg Loads Variation

6. Estimated Hg Load Variability

7. Options for Continuation (see word document for details) Option 1: Discontinue –$0k Option 2: Continue Status Quo –$80k per year (local sponsor) + $50k per year (RMP) = $130k/y Option 3: Large Floods Only – Falling Stage –$35k per year (USGS) (every year ongoing) –$15k (SFEI labor) + $10k (Hg lab analysis) only when a large flood occurs = $25k –$140k full study every 5 years (next time would be in water year 2011)