Three key issues need to be addressed in order to evaluate a SSO for nickel:
How much of dissolved nickel in bay waters is complexed by organic ligands?
The extent of nickel complexation by organic ligands should be measured using methods already established in South San Francisco Bay studies. This information can be used to model free ionic nickel concentrations. Speciation studies should focus on regions known to have elevated nickel concentrations and measure nickel speciation under both high-flow and low-flow conditions.