Environment
Air emissions - volatile organic compounds (VOC)
Bayswater Power Station total VOC emissions decreased 97%. The significant decrease in emissions was due to a change in the way in which emissions were calculated in FY23. In FY23, point source emissions were calculated using the summed total of individual VOCs measured from two rounds of stack tests on each of the four units. In previous years, point source emissions were calculated by application of emission factors to the total amount of coal combusted at the facility. Using results from stack testing is more accurate than using emission factors.
Liddell Power Station total VOC emissions decreased 78%. Point source emissions are calculated using the summed total of individual VOCs measured in stack tests. Measurements of individual VOCs were lower in FY23 compared to FY22, with most VOC substances below the detection limit. This, combined with the decrease in operating hours, resulted in a 93% decrease in point source VOC emissions
AGL Torrens total VOC emissions decreased 22%.The decrease in emissions aligns with the overall decrease in pipeline natural gas combustion at Torrens Island and Barker Inlet power stations (down 23%).
Notes
FY23 data was updated in November 2023. A subset of data (comprising emissions associated with the combustion of black coal at Bayswater and Liddell power stations, black and brown coal as well as natural gas at AGL Loy Yang Power Station, and gas and fuel oil at AGL Torrens Power Station) was reported with the initial release of the FY23 Data Centre on 10 August 2023.
For the purposes of this data set, AGL Torrens comprises the Torrens Island Power Station and the Barker Inlet Power Station.
All figures have been rounded to the nearest kilogram.
Emissions from Kwinana Swift Power Station have been included from FY20.
Air emissions data for AGL sites is publicly reported NPI data (see www.npi.gov.au/).
The emission factors used in AGL's NPI reports are sourced from relevant industry emission estimation technique manuals available on the NPI website.