Southern Cross Operations Annual Environmental Report 2008 - 2009

2009 Annual Environmental ReportSouthern Cross OperationsUnder the EP Act Licence 4597/12, five TSF bores require monitoring for specifiedanalytes/water levels quarterly during December, March, June and September and sixmonthly during March and September. When interpreting the licence, condition W10(a)requires “major anions and cations” to be monitored, (in addition to the analytes listed).It has been assumed that all major cations and anions are captured in the table under-condition W10(a) with the addition of the anions NO 3 and SO 2- 4 . One of the bores(MB94B1) was dry for the duration of the reporting period, therefore samples could notbe taken for this bore. Therefore only 64 monitoring events (quarterly) and 176monitoring events (six-monthly) were possible for the reporting period. In addition tomonitoring bore data, a further nine piezometers require monitoring for standing waterlevels in September, December, March and June (36 monitoring events).Figure 7-3: Marvel Loch TSF and Monitoring Bore Locations.Analysis of the quarterly bore water monitoring indicates that four omissions (out of 64monitoring events) occurred; WAD CN was not recorded at any of the four bores inSeptember 2008. In addition to these omissions sampling of MB94G1 occurred 11days late for the September monitoring.For the six monthly bore monitoring no omissions (out of 176 monitoring events)occurred for the reporting period, although sampling of MB94G1 occurred 11 days late43