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Trends in PARWQP Inputs
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Linkage of Bioaccumulation and Biological Effects to Changes in Pollutant Loads in South San Francisco Bay
Michelle Hornberger, Samuel Luoma, Daniel Cain, Cynthia Brown, Robin Bouse,
Francis Parchaso, Christopher Wellise, and Janet Thompson

Although the total volume of effluent remained relatively constant through time, Cu loads decreased through time. Very little change in Zn loads occurred during the study period. (Note: Ag loads not quantified during early phase of study.)

Total annual Cu and Zn loads

Decreases in metal concentration in clams correspond to the plant improvements, through 1988-91.

Copper in M. balthica

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