Ranger mine monitoring data

Gulungul Creek monitoring data 2014-2015

The graphs on this web page show the key chemical indicators for the 2014–2015 wet season plus water level from the Gulungul Creek downstream monitoring station (GCDS). Data from previous wet seasons can be found at Gulungul Creek grab sample monitoring data 2002 - 2010 and Gulungul Creek monitoring data 2010-2014. For reference, Gulungul Creek data are compared with the Magela Creek Water Quality Objectives.

The Supervising Scientist's interpretation of the data in these charts, along with supporting information, is available at:

Conductivity in Gulungul Creek

The conductivity limit of 42 µS/cm was ecotoxicologically derived and applies to exposure duration of 72 hours or greater. The Supervising Scientist has developed an interpretive framework to enable assessment of potential impacts arising from exposure durations that are less than 72 hours. Further details on this framework and its implementation can be found on the Ecotoxicological Electrical Conductivity-Magnesium Pulse Framework page.

Gulungul Creek continuous monitoring conductivity data from the commencement of the 2014–15 wet season. Trigger values are based on Magela Creek Water Quality Objectives and are overlain for comparison.

Turbidity in Gulungul Creek

The turbidity guideline of 26 NTU was determined statistically from historical weekly grab sampling data from Magela Creek. In the absence of a site specific guideline for Gulungul Creek the Magela Creek guideline can be used as an indicative guide for assessing the water quality within Gulungul Creek. This guideline may be exceeded occasionally due to natural events but should not be exceeded due to mining activities.

Gulungul Creek continuous monitoring turbidity data from the commencement of the 2014–15 wet season. Trigger values are based on Magela Creek Water Quality Objectives and are overlain for comparison.

Uranium in Gulungul Creek

The uranium limit of 6 µg/L has been derived using local ecotoxicological data in accordance with the Australian Water Quality Guidelines to protect 99% of the species present. The limit must not be exceeded. Please note that the limit is far above the range shown on the charts.

Gulungul Creek uranium data from the commencement of the 2014–15 wet season. Trigger values are based on Magela Creek Water Quality Objectives and are overlain for comparison. Please note that the uranium Limit of 6 µg/L is off the chart.

Manganese in Gulungul Creek

The manganese limit of 75 µg/L was ecotoxicologically derived and is only applicable during periods of high flow. This guideline may be exceeded occasionally due to natural events but should not be exceeded due to mining activities.

Gulungul Creek manganese data from the commencement of the 2014–15 wet season. Trigger values are based on Magela Creek Water Quality Objectives and are overlain for comparison. Please note that the manganese Limit of 75 µg/L is not shown on the chart.

Magnesium in Gulungul Creek

The magnesium limit of 3 mg/L was ecotoxicologically derived and applies to exposure durations of 72 hours or greater. The Supervising Scientist has developed an interpretive framework to enable assessment of potential impacts arising from exposure durations that are less than 72 hours. Further details on this framework and its implementation can be found on the Ecotoxicology Electrical Conductivity-Magnesium Pulse Framework page.

Gulungul Creek magnesium data from the commencement of the 2014–15 wet season. Trigger values are based on Magela Creek Water Quality Objectives and are overlain for comparison.

Sulfate in Gulungul Creek

There is no specific guideline for sulfate in Gulungul Creek. Conductivity is strongly correlated to sulfate so the guideline for conductivity is referred to when interpreting sulfate data. For comparison, the drinking water standard with taste as the criterion for sulfate is 250 mg/l.

Gulungul Creek sulfate data from the commencement of the 2014–15 wet season. Trigger values are based on Magela Creek Water Quality Objectives and are overlain for comparison.