1. Sierra Nevada Klamath-Trinity Mountains San Francisco Coast Range Mercury Mining Gold Mining =gold mines = mercury mines Cover up of Legend For corner

2. Advisories have been issued for some of the contaminated areas

4. Wetland areas that have relatively high levels of methyl mercury in water (>1 ng/g) Yolo Bypass Yolo Bypass Grizzly Island Grizzly Island Los Banos wildlife area Los Banos wildlife area Blacklock wetlands in Suisun Blacklock wetlands in Suisun Several farmed islands in Delta Several farmed islands in Delta Anderson Marsh (Clear Lake) Anderson Marsh (Clear Lake)

5. PRIMARY FINDINGS 11. Mercury concentrations in eggs of some bird species in the Bay/Delta ecosystem were above embryotoxic thresholds.

7. Regional Board Basin Plan Amendment will call for studies and strategies from wetland owners for reducing methyl mercury exposure to humans and wildlife