Tasks to be undertaken for the implementation of the additional control measures identified are outlined in Table 6.1, and the timeline for implementing such tasks specified.
BMC BMP Determination 22 Feb 2012.docx Page 48 Table 6.1 Tasks and implementation timelines for the application of additional control measures at Bengalla OEH Mining Activity
Category
Additional Control
Measures Tasks Implementation Timeline
Wheel Generated Dust (Unpaved Roads)
Wind Erosion of Exposed Areas (Unpaved Roads)
Primary measure:
Chemical suppression on unpaved haul roads Supporting measures:
Documentation of the haul road management program for consistent implementation Measurement of dust control effectiveness, e.g. through the use of dust monitors
Identify a product and devise an application strategy. February – 30 June 2012 Identify a method of measuring the dust control effectiveness
appropriate for haul roads.
February – 30 June 2012
Undertake dust measurement to establish the control effectiveness achieved by chemical suppression, and compare with the dust control efficiency target of 80 percent.
July – 30 September 2012
Documentation of the haul road management program. July – 30 September 2012 Application of chemical suppression, integrated within the site’s
haul road management program.
October 2012 onwards
Review findings of ACARP Project C20023, Improvement of Haul Road Dust Emission Estimation and Controls at Coal Mines, when available, to further support implementation of this measure.
Date dependent on study completion.
OEH Mining Activity Category
Additional Control
Measures Tasks Implementation Timeline
Wind Erosion of Overburden
Interim stabilisation through vegetation and/or chemical suppression
Review currently exposed overburden emplacement areas to assess:
• the period over which such areas are to remain inactive
• material and surface characteristics (moisture content; particle size distribution; evidence of crusting),
• exposure to prevailing winds, and
• proximity to environmental receivers.
February – June 2012
Establish and implement the most suitable interim stabilisation methods to the currently exposed overburden emplacement areas identified (e.g. hydromulching, chemical stabilisation, direct seeding, aerial seeding).
February – December 2012
Determine a suitable time limit for inactive overburden emplacement areas with dust generation potentials to remain exposed, following which interim stabilisation is required.
February – June 2012
Establish timelines within which interim stabilisation measures are to be applied for future years (e.g. time periods in the range of 1-3 months are practicable for chemical suppression; and 3-6 months for vegetation, depending on what time of the year areas become available for vegetation).
February – June 2012
Establish a process whereby mine planning identifies, on a monthly basis, areas available for application of interim dust suppression measures. Include this accountability in relevant procedures.
July – December 2012
On-going monthly identification of areas for interim stabilisation, and implementation of such stabilisation within established timelines.
January 2013 onwards
BMC BMP Determination 22 Feb 2012.docx Page 50
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