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Identification and assessment of contaminated sites at Casey Station, Wilkes Land, Antarctica

Published online by Cambridge University Press:  27 October 2009

Patrick P. Deprez ,
Michael Arens  and
Helen Locher
Patrick P. Deprez
Affiliation:
Department of Primary Industries, Water and Environment, GPO Box 44A, Hobart, Tasmania 7001, Australia
Michael Arens
Affiliation:
Australian Antarctic Division, Commonwealth Department of the Environment and Heritage, Channel Highway, Kingston, Tasmania 7050, Australia
Helen Locher
Affiliation:
Hydro Electric Corporation, GPO Box 355D, Hobart, Tasmania, Australia
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Abstract

In December 1993 a study of contaminated sites at Casey Station, Wilkes Land, Antarctica, was undertaken. The preliminary assessment of these contaminated sites is presented here. A register of contaminated sites for Casey Station was developed, based on a survey of past Antarctic expeditioners, relevant literature, and in-house reports relating to site usage and history. On this basis a sampling strategy was devised for the highest priority, potentially contaminated sites at Casey Station. Samples were collected from the refuse disposal site (tip site) at Thala Valley and the mechanical workshop/powerhouse areas of ‘Old’ Casey. The results indicated that copper, lead, and zinc were leaching from the tip site into adjacent Brown Bay, with ‘hot spots’ of high petroleum hydrocarbon levels. The mechanical workshop/powerhouse area was also shown to be contaminated with petroleum hydrocarbons, polycyclic aromatic hydrocarbons, and metals such as copper, lead, and zinc. Several recommendations were made, including the removal of rubbish mixed with soil at the bottom end of Thala Valley in such a manner as to prevent any further release of contaminants, with subsequent site monitoring to verify effective removal of contaminants to acceptable environmental levels. It was also recommended that further investigations be carried out on the ecosystem of Brown Bay, the large fuel spill site, the upper and lower fuel-storage areas, and the area around the incinerator. There is scope for monitoring the natural breakdown and migration of contaminants at the mechanical workshop/powerhouse site. This should include studies on bioremediation of hydrocarbon-contaminated soils. Mechanisms for arresting surface migration should be investigated in those sites identified. In addition to meeting some of the international obligations of the Protocol on Environmental Protection to the Antarctic Treaty, this work also contributes towards the development of an approach to assessment and management of contaminated sites that is uniquely adapted to the Antarctic environment and could be applied at other Antarctic stations. to the assessment and management of contaminated sites that is uniquely adapted to the Antarctic environment. This approach could be utilised for site assessments at other Antarctic stations.

Type
Articles
Information
Polar Record , Volume 35 , Issue 195 , October 1999 , pp. 299 - 316
Copyright
Copyright © Cambridge University Press 1999

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