Glossary

1 x 7 crew A multi-skilled work-group in the Hazelwood mine that perform tasks such as fire services, earthworks and general maintenance around the mine on a seven day roster.
2 x 12 crew The operations team at the Hazelwood mine working on day and night shifts.
Area RAE Mobile air monitoring deployed to Morwell to monitor carbon monoxide levels.
Australasian
Inter-service Incident Management System
A nationally recognised system of incident management for emergency services agencies.
batters An area of the Hazelwood mine, also referred to as the mine wall or a section of the mine wall. The batters may refer to either the individual steeply sloping surfaces between working levels of the mine or the overall mine wall from the bottom of the mine to grass level consisting of individual batters, benches and berms.
benches Horizontal flat surfaces created by the individual working levels.
berms The relatively flat surfaces created in batters between working levels of the Hazelwood mine to stabilise the batter or intercept fretted material.
Black Saturday The Victorian bushfires of Black Saturday, 7 February 2009, that caused the death
of 173 people.
bunker A structure used for the short-term storage of mined coal prior to its use in a power station or other means.
clean water pump Water pump at the Hazelwood mine that de-waters the aquifer beneath the Hazelwood mine and conveys the artesian water to the Hazelwood pondage.
contained (fire) The status of a fire where the spread of the fire has been halted, but it may still be burning freely within the perimeter.
containment line A natural or constructed barrier, or treated fire edge, used in fire suppression and prescribed burning to limit the spread of fire.
control agency The agency nominated to control the response activities for an emergency.
controlled (fire)
or under control
The status of a fire where the complete perimeter of the fire is secured and no breakaway
is expected.
fire season The fire season is also known as the Fire Danger Period. The CFA declares the Fire Danger Period for each municipality (shire or council) at different times in the lead up to the fire season. The Fire Danger Period may be declared as early as October in some municipalities and typically remains in place until the fire danger lessens, which could be as late as May.
dredger A bucket-wheel digging machine that digs coal out from the batters of the mine, and deposits the coal onto the conveyor system that carries the coal to the power station.
DustTrak Mobile air monitoring equipment deployed to Morwell to produce indicative data for PM2.5.
ember attack Occurs when embers carried by the wind ignite spot fires ahead of the firefront.
embers Burning twigs, leaves and other debris that are carried by the wind.
Emergency Warning One of the levels of alerts used to warn the community during an emergency. The message for an Emergency Warning is, ‘you will be impacted by the emergency. You are in danger and must take action immediately’. The message will usually be preceded by the Standard Emergency Warning Signal.
Fire Alert
(Hazelwood mine)
A Fire Alert is declared at the Hazelwood mine when severe fire weather conditions exist. A Fire Alert triggers precautions, such as fire watch, prohibition of burning and welding, access and wetting down.
fire break Any piece of land where fire fuel has been physically removed to create a gap between an area of uninterrupted fire fuel. The fire break may be an area of exposed earth, a sand track, a bitumen road, or a water body.
fire danger rating The prediction of how a fire would behave if started, including how difficult it would
be to put out. The higher the rating, the more dangerous the conditions.
firefront Also called the head of the fire. A firefront is where a fire is making greatest progress (usually downwind), as measured by its forward rate of spread. Flames are tallest and the intensity of the fire is greatest at the fire front. The firefront is affected by wind direction, fuel and topography and can change as these factors change.
fireground The area where the fire is actively burning.
fire hole Fire holes are areas of heat within coal seams under the earth. As coal is fractious,
fissures are created within the seams, allowing oxygen to reach a hot spot and ignite a fire.
Fire holes occur naturally at the Hazelwood mine.
flank of the fire Refers to the sides of the fire, as distinct from the front of the fire.
going (fire) The status of a fire that is expanding in a certain direction or directions.
hot spot An active part of a fire. Also used to refer to a fire hole.
hot works Hot works at the Hazelwood mine refer to cutting, grinding or welding.
Level 1 fire incident A small, simple fire (or group of fires) which is able to be controlled using local resources.
Level 2 fire incident A fire that cannot be contained by the first attack of local resources.
Level 3 fire incident A large or complex fire where resources from a range of locations are involved.
major hazard facility A facility at which there is a potential for a major incident to occur. A major incident includes an uncontrolled incident involving fire which poses a serious and immediate risk to health and safety.
major mining hazard Hazards that carry a significant risk of causing more than one death.
MoLab Mobile air monitoring equipment deployed to Morwell to monitor air quality.
overburden The clay, gravel and soil that covers coal and which is removed in the mining process.
passive samplers A type of air sampling device. Passive samplers do not actively sample by drawing (pumping) an air stream across a sensor, but usually have a membrane or surface that interacts with the immediately adjacent air.
permanent monitoring stations Stations managed by the EPA that monitor ambient air quality in permanent locations throughout Victoria.
operating area (Hazelwood mine) The western batters or west field, where coal is currently being extracted.
reticulated fire services water system Also known as the fire service network. The system consists of a pipe network which supplies water to sprays and hydrants (including tanker filling points) in the mine.
safe (fire) The status of a fire where no further suppression action or patrols are necessary.
shelter in place An emergency response action recommended to the community for safety purposes when the outdoor atmosphere is too toxic. Shelter in place means to take shelter indoors, to seal off windows, doors and vents, and to listen for further instructions from emergency services.
slot bunker A central point at the Hazelwood mine where the coal is delivered from the mine and then sent onto the Hazelwood Power Station.
spot fire Spot fires are new fires that occur ahead of the main fire. They are usually started
by embers.
spotting The ignition of spot fires from sparks and embers.
State Emergency Warning System Or Standard Emergency Warning Signal – designed to alert the public via a media announcement that an official emergency announcement is about to be made concerning an actual or potential emergency which has the potential to affect the public.
strike team A team of five like CFA vehicles (eg tankers) and a command vehicle, all fully crewed.
tanker filling point An area where a mobile tanker can refill with water.
TravelBLANkET Mobile air monitoring equipment deployed to Morwell to produce indicative data for
PM2.5 measures.
Watch and Act One of the levels of alerts that are to warn the community during an emergency.
western batters
or west field
The western area at the Hazelwood mine where coal is currently being extracted. Also known as the Operating Area.
worked out batters Batters located in the worked out areas of the Hazelwood mine.
worked out areas The areas within the Hazelwood mine where coal mining no longer takes place.