AGL Loy Yang, Loy Yang B and Energy Australia Yallourn Latrobe Valley Coal Fired Power Stations Licence Review Community Summary Report August 2018 Table of contents 1. Introduction..................................................................................................................................... 1 1.1 Periodic licence review ........................................................................................................ 1 1.2 Purpose of this report........................................................................................................... 1 2. Regulatory framework – Victoria .................................................................................................... 2 2.1 EPA Act ................................................................................................................................ 2 2.2 National Environment Protection (Ambient Air Quality) Measure ........................................ 2 2.3 State Environment Protection Policies ................................................................................. 3 3. Latrobe Valley Air Quality Control Region characteristics ............................................................. 6 4. Latrobe Valley power stations ...................................................................................................... 10 4.1 General description ............................................................................................................ 10 4.2 Annual Performance Statement (APS) .............................................................................. 11 5. Power station licence monitoring regime ..................................................................................... 12 5.1 By each facility ................................................................................................................... 12 5.2 Emissions profile 2013-2017 ............................................................................................. 12 6. Latrobe Valley Air Quality Control Region ambient monitoring .................................................... 16 6.1 Review of previous air quality modelling............................................................................ 20 7. Proposed new licence parameters ............................................................................................... 21 7.1 Particulate matter ............................................................................................................... 21 7.2 Mercury .............................................................................................................................. 25 8. New air dispersion modelling ....................................................................................................... 28 8.1 EPA approved modelling proposal .................................................................................... 28 8.2 Modelling with fixed emission rates ................................................................................... 28 8.3 Model prediction sensitivity to new parameters ................................................................. 34 9. Other items ................................................................................................................................... 38 9.1 Best practice emission management ................................................................................. 38 9.2 Monitoring technical limitations .......................................................................................... 39 10. Findings and recommendations ................................................................................................... 40 10.1 Current ambient monitoring ............................................................................................... 40 10.2 Assessment of ambient air monitoring and modelling of the Power Station emissions ........................................................................................................................... 40 10.3 The adequacy of existing air pollution control technology ................................................. 41 11. Scope, limitations and assumptions ............................................................................................. 42 GHD | Report for AGL Loy Yang, Loy Yang B and Energy Australia Yallourn - Latrobe Valley Coal Fired Power Stations Licence Review, 3136071 Table index Table 1 NEPM AAQ monitoring standards ....................................................................................... 3 Table 2 SEPP AQM design (modelling) criteria ................................................................................ 4 Table 3 Power Stations Environment Management Systems (EMS) ............................................. 11 Table 4 Source air monitoring program .......................................................................................... 12 Table 5 Highest impacted grid point for total suspended particles (TSP) ...................................... 31 Table 6 Highest impacted grid point for PM10 and PM2.5 ................................................................ 31 Table 7 PM2.5 Emission rates (uniformly) scaled upward to match the ambient standard set-points ........................................................................................................................... 33 Table 8 Mercury Emission rates (uniformly) scaled upward to match the ambient standard set-point. ............................................................................................................. 34 Figure index Figure 1 Extract from State environment protection policy (Air Quality Management) – Schedule F ........................................................................................................................... 5 Figure 2 Latrobe Valley terrain with monitoring stations and Power Stations ................................... 6 Figure 3 Annual wind roses for Morwell East, Traralgon, Jeeralang Hill and Rosedale South .................................................................................................................................... 8 Figure 4 Annual wind roses for Latrobe Valley airport – surface and 250 m ..................................... 9 Figure 5 A typical Latrobe Valley coal fired power station schematic .............................................. 10 Figure 6 Loy Yang A emission profiles – SO2 (30 minute data) ...................................................... 13 Figure 7 Loy Yang A emission profiles – total particles (30 minute data) ........................................ 14 Figure 8 Loy Yang B emission profiles – SO2 (30 minute data) ...................................................... 14 Figure 9 Loy Yang B emission profiles –total particles (30 minute data) ......................................... 15 Figure 10 Yallourn emission profiles – total particles (30 minute data) ............................................. 15 Figure 11 NO2 1-hour maximum, as a percentage of NEPM AAQ standard ..................................... 18 Figure 12 NO2 annual, as a percentage of NEPM AAQ standard ..................................................... 18 Figure 13 SO2 1-hour maximum, as a percentage of NEPM AAQ standard ..................................... 19 Figure 14 SO2 annual, as a percentage of NEPM AAQ standard ..................................................... 19 Figure 15 Daily maximum PM10, as a percentage of NEPM AAQ standard ...................................... 22 Figure 16 Annual PM10, as a percentage of NEPM AAQ standard .................................................... 22 Figure 17 Daily maximum PM2.5, as a percentage of NEPM AAQ standard ..................................... 23 Figure 18 Annual PM2.5 as a percentage of NEPM AAQ standard .................................................... 23 Figure 19 Daily and rolling annual average at Traralgon PM2.5 2014 to 2017 ................................... 24 Figure 20 Particle characterisation study of the Hunter Valley (Robinson, 2016) ............................. 25 GHD | Report for AGL Loy Yang, Loy Yang B and Energy Australia Yallourn - Latrobe Valley Coal Fired Power Stations Licence Review, 3136071 Figure 21 Predicted maximum one-hour SO2 for 2014 - maximum emissions .................................. 29 Figure 22 Predicted hourly, daily and annual SO2 concentrations - maximum emissions ................ 30 Figure 23 PM10 at 100% of TSP using bottom-up approach to compare to existing emission limits .................................................................................................................... 32 Figure 24 Predicted maximum daily PM10 compared to standard and measured ............................. 35 Figure 25 Predicted annual PM10 compared to standard and measured .......................................... 35 Figure 26 Predicted maximum daily PM2.5 compared to AAQ standard and measured .................... 36 Figure 27 Predicted annual PM2.5 compared to AAQ standard and measured ................................. 36 Figure 28 2017 Predicted 3-minute mercury concentrations (ng/m3) ................................................ 37 GHD | Report for AGL Loy Yang, Loy Yang B and Energy Australia Yallourn - Latrobe Valley Coal Fired Power Stations Licence Review, 3136071 1. Introduction 1.1 Periodic licence review The Environment Protection Authority Victoria (EPA) is reviewing the environment licences issued to the brown coal fired power stations