| Figure
3.17. |
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Near-total nickel (Ni) concentrations in water
in parts per billion (ppb) at 24 RMP stations sampled
in January, April, and August 1997. Concentrations
ranged from 0.61 to 39.48 ppb. The highest concentration
was sampled at Petaluma River (BD15) in January
and the lowest at Golden Gate (BC20) in August.
Average concentrations were highest (27.48 ppb)
in the Southern Sloughs in January and lowest (1.74
ppb) in the Central Bay in April. Twenty-eight samples
were above 24-hour average WQO for total nickel
(saltwater 7.1 ppb, freshwater--hardness dependent).
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