AGL Community Engagement Forum

AGL Loy Yang

AGL Employee

This discussion forum is one of the places you can share local knowledge, thoughts and feedback, and ask questions to better understand AGL Loy Yang, including the AGL Loy Yang Mine and Loy Yang 'A' Station.

 

If you have any questions, concerns, or ideas outside of the topics we post in this group, still feel free to post or engage in the conversation. Given our business continuity priorities through the Coronavirus (COVID-19) outbreak, we may take longer than usual to get back to you.

 

We apologise in advance for any delay, and thank you for your understanding.

 

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Re: AGL Loy Yang

Switched-on

What is AGL doing at Loy Yang A to prevent excess coal ash dust emissions similar to the situation at Liddelle Power Station?

 

is there a difference between Brown Coal ash and ash from black coal?

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Re: AGL Loy Yang

AGL Employee

Hi @Greenthumb732,

 

Thanks for your question. A few points about Loy Yang’s ash collection:

  • Loy Yang’s ash pond is approximately one tenth the surface area of Macquarie and Liddell.
  • Loy Yang remove and bury its leached ash annually in an EPA approved cell which are clay capped at the end each season.
  • Loy Yang’s ash ponds are fully covered in water for eight months each year.  The pond being excavated is only exposed to wind for two months each year

As you may be aware ash is the incombustible solid residue from the combustion of the brown coal in the boilers. The ash is collected in the boiler hearths and electrostatic precipitator hoppers and is conveyed as a slurry mixed with water to the Ash Pond. Once the ash slurry enters the Ash Pond the ash settles out from the water in the slurry mixture. The water from the Ash Pond is decanted to be either recycled back to Loy Yang A for reuse or transferred to the saline waste outfall pipeline to a licenced discharge point under Gippsland Water’s EPA licence. The ash is removed from the Ash Pond and deposited into an EPA licensed onsite Ash Landfill.

 

The Ash Pond is comprised of three interconnected ponds:

  • The northern settlement pond and the southern settlement pond operate on a two-year cycle, with one of the two settlement ponds being filled in the first year and then dewatered and the ash removed in the second year. This operation alternates between the two settlement ponds to provide continual ash storage capacity.
  • The eastern clarification pond, which receives overflow water from the settlement ponds and the saline water from Hazelwood and Yallourn, allows for further settlement of suspended solids.

One settlement pond and the eastern clarification pond is always covered with water, therefore the risk of dust generation is negligible. The highest risk of dust generation is when ash is being excavated from the dried settlement pond and transferred to the Ash Landfill. Loy Yang has invested in a floating excavator to accelerate the ash removal process and reduce the impact of weather on the operation. To further minimise the risk of dust generation water carts are employed to wet down the truck haul route. During the carting campaign weather conditions are monitored, and activities suspended during high wind events. After the ash has been deposited in the Ash Landfill the ash is covered with a dust suppressant.

 

The physical and chemical properties of ash vary according to the mineralogy of the non-combustible materials in the coal, the temperature and conditions of combustion and methods of ash collection. The properties of ash not only vary between facilities but can also vary among samples from the same facility due to the variability of the coal within a coal seam. However, the major element chemistry and physical properties of brown coal ash and black coal ash in Australia will fall within typical ranges.

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Re: AGL Loy Yang

Switched-on

What is the plans for Loy Yang with the new Corona outbreak announcement?

is a situation planned where the station is shut down because of lack of workers? 
will other employees in agl be called in or former employees recruited?

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Re: AGL Loy Yang

AGL Employee

We can confirm that an AGL Loy Yang employee has tested positive for COVID-19. 

 

The employee was last on site at Loy Yang on Wednesday 29 July and we are supporting the employee who is self-isolating in line with government advice until receiving medical clearance to return to work. We are also supporting our workforce at the plant. 

 

AGL Loy Yang has strict safety measures around social distancing and hygiene protocols on site.  All employees or contractors in close contact with this employee have been notified, asked to self-isolate and get tested and follow government advice. 

Worksafe has been notified, a deep clean will be undertaken at site and we will work closely with relevant authorities to assist with contact tracing. 

 

The safety and wellbeing of our people is our highest priority and we will continue to carefully monitor the situation. 

 

Our priorities are our people – the safe management of employees and contractors – while ensuring we keep generating for our customers and community.

 

We do have site-specific pandemic plans in place across our operations including here at Loy Yang. Extensive work on scenario planning and business continuity planning was carried out at the beginning of the pandemic and has continued to be updated as required. We have various measures in place to assist in preventing the spread ofCOVID-19 on site including site screening questions, temperature checks, strict hygiene measures, modifying interactions to limit contact such as splitting crews and the requirement to remain two metres socially distant and to wear masks on site.

 

We have reminded everyone to continue to comply with the Trigger Action Response Plan and to notify us if they feel unwell or display symptoms, including fever, or flu-like symptoms such as coughing.

 

We are restricting access to site and we are engaging with key stakeholders to ensure our workforce understands and supports these measures.

 

These actions are in line with the Victorian Department of Health and Human Services and World Health Organisation guidelines. Any changes to this plan would be driven by government advice and changes in the environment. There is no impact to generation from the site.

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