HVO 2009 Annual Environmental Management Report - Final

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Coal & Allied – Hunter Valley Operations 3 ENVIRONMENTAL MANAGEMENT AND PERFORMANCE The Environmental Impacts Risk Register was reviewed in 2009 to systematically identify all the activities related to the mine that could cause environmental harm. A risk ranking is applied to these impacts (Table 15). Risk are ranked using a four tier classification; low, moderate, high or critical. In 2009 HVO identified no critical environmental impacts on site. The implementation and effectiveness of control strategies is to manage these risks which are summarised in Table 15. Table 15: Summary of Environmental Impacts Risk Register Potential Impact Air Quality (dust, spontaneous combustion, greenhouse gases) Vibration and Air Blast Overpressure Visual Amenity, Stray Light Habitat Protection (vegetation clearing, feral animals and weed control) Water Use Land Contamination Operational Noise Surface Water Quality Soil Erosion/Soil Loss Cultural Heritage Groundwater Quality Risk Ranking High High High High High Moderate Moderate Moderate Moderate Moderate Low 3.1 METEOROLOGICAL 3.1.1 Environmental Management The collection of meteorological data is carried out to assist in day to day operational decisions, planning, environmental management and to maintain an historic record. The meteorological (weather) stations record wind speed, wind direction, temperature, humidity, solar radiation and rainfall. The instruments are installed and calibrated according to the relevant Australian Standards (AS) 2923 (1987). Real time wind speed and direction is accessible to employees via the Coal & Allied intranet. This service provides the mining operations with the trend assessment details required to allow for informed operational decisions aimed at minimising impacts from the operation. HVO operates two real time weather stations; The HVO Corporate Meteorological Station and the Cheshunt Meteorological Station (refer to Figure 19). 3.1.2 Environmental Performance Monthly records (January 2009 – December 2009) and an annual summary of weather data is presented in Appendix 5 and Figure 15 to Figure 18. These records include; total monthly rainfall and total cumulative rainfall, monthly maximum and minimum temperatures, maximum wind speeds, mean wind direction, relative humidity minimum and maximum, solar radiation maximum, quarterly and annual wind-roses. HVO operates two meteorological stations, Corporate and Cheshunt. The HVO Corporate meteorological station was struck by lightning in October 2009. Therefore the reported weather data for was collected from the Cheshunt station while the Corporate station was inoperational. AEMR 2009 51
Coal & Allied – Hunter Valley Operations Data capture for 2009 was 100 per cent with the exception of rainfall which captured 99.73 per cent. Missed data was due to equipment malfunction during 2009 as detailed in Appendix 5. Data has been reported using the Cheshunt East meteorological station where equipment failure occurred at HVO Corporate meteorological station (01/10/2009 to 12/10/2009 due to lighting strike), Solar radiation (04/03/2009 to 31/12/2009) and Rainfall (01/10/2009 to 31/12/2009) due to equipment failure. 3.1.3 Rainfall Total rainfall for this reporting period was 564.4mm. Table 16 details the monthly breakdown for rainfall. A comparison on rainfall data for the last three years can be seen in Figure 15. There was approximately a three per cent decrease in annual rainfall in 2009 compared to 2008. Table 16: Rainfall Summary for 2009 Jan Feb Mar Apr May Jun July Aug Sep Oct Nov Dec Monthly Rainfall 3.0 172.0 81.6 57.4 38.4 38.2 22.2 1.0 26.2 33.0 25.0 66.6 2009 (mm) Cumulative Rainfall 3.0 175.0 256.6 314.0 352.4 390.6 412.8 413.8 440.0 473.0 498.0 564.6 2009 (mm) Wet Days * 3 8 7 6 10 7 8 2 4 10 7 7 Cumulative Wet Days * 3 11 18 24 34 41 49 51 55 65 72 79 *Note: Wet days are classified as days receiving rainfall greater than 0.2 mm. ** Note: Some data for October, November and December sourced from the Cheshunt meteorological station due to a lightning strike on the Corporate Centre meteorological station. Hunter Valley Operations - monthly and cumulative rainfall 2007-2009 Monthly Rainfall (mm) 300 250 200 150 100 50 0 Jan Feb Mar April May June July Aug Sept Oct Nov Dec Date 700 600 500 400 300 200 100 0 Cumulative Rainfall (mm) Monthly Rainfall 2007 Monthly Rainfall 2008 Monthly Rainfall 2009 Cumulative Rainfall 2007 Cumulative Rainfall 2008 Cumulative Rainfall 2009 Figure 15: Rainfall Summary for 2007 to 2009 AEMR 2009 52
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HVO 2009 Annual Environmental Management Report - Final

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