It is also important to consider the
concentrations that have been recorded in environmental samples, in
particular at dredged material disposal sites. In the UK alone there
are over 150 disposal sites including the Rame Head site, which
serves the marine disposal requirements of the River Tamar and
Plymouth Sound. The site lies in water depths of 18–38 m and is
located approximately 2 km west of Rame Head and 6 km west
of the entrance to Plymouth Sound. At the Rame Head disposal site,
the
P
PAH concentrations ranged from 0.4 to 2.6 mg/Kg dry weight
(Allen, 2005)and410 mg/Kg in the Tyne and Tees estuaries
(Woodhead et al., 1999). In contrast a study in Sydney harbour,
Australia, showed the maximum
PAH concentrations to be as high
as 380 mg/Kg dry weight