

State and trends of contaminated Antarctic sites
State and trends of contaminated Antarctic sites
Terrestrial section of Thala Valley clean-up finalised; some material remains in the nearshore marine environment
Terrestrial section of Thala Valley clean-up finalised; some material still left in nearshore and marine environment
Historical fuel spill (1980s)
Historical fuel spill (1980s)
Fuel spill at main powerhouse (1999); contaminants reached the melt lake from which fresh water is obtained for the station
Fuel spill at main powerhouse (1999); contaminants reached the melt lake from which fresh water is obtained for the station
Abandoned station (built in 1957); old tip site and fuel cache are still present and contain a large volume of contaminated material
Abandoned station (built in 1957); old tip site and fuel cache still present and contain a large volume of contaminated material
Old tip site near Davis research station
Old tip site
Fuel spill (2010)
Old tip site, large land-based debris removed. Some material remains in the nearshore marine environment
Old tip site, large land-based debris removed; some material still left in nearshore marine environment
Historical fuel spill (1980s)
Historical fuel spill (1980s)
Historical fuel spills (1980s–2000)
Historical fuel spills (1980s-2000)
Leakage of 3500 litres of special Antarctic blend fuel from above-ground fuel line. Containment barriers were constructed and an extensive area (less than 5000 m2) of contaminated soil requiring treatment and remediation was identified
Assessment Summary Key
Grades
Very good
Remediation activities completed; remediation monitoring continues
Good
Remediation in progress and/or containment of contaminants achieved
Poor
Preliminary impact assessment under way including identification of contaminants
Very poor
No action yet
Recent Trends
-
Improving
-
Stable
-
Deteriorating
-
Unclear
Confidence
-
Adequate: Adequate high-quality evidence and high level of consensus
-
Somewhat adequate: Adequate high-quality evidence or high level of consensus
-
Limited: Limited evidence or limited consensus
-
Very limited: Limited evidence and limited consensus
-
Low: Evidence and consensus too low to make an assessment
Comparability
-
Comparable: Grade and trend are comparable to the previous assessment
-
Somewhat comparable: Grade and trend are somewhat comparable to the previous assessment
-
Not comparable: Grade and trend are not comparable to the previous assessment
-
Not previously assessed
Comments
Assessment remains the same as in 2011.