The list, page-45

"Chemiplas is actively applying for approval. Samples have been taken from the Lake and Chemiplas have been conducting their own bucket tests. Upon approval and registration the plan would be to conduct a three week trial in a closed off section of the Lake near the recreation area pump house."

I didn't get far .... bottom of p3. so I looked up Chemiplas. https://chemiplas.com.au/markets/water/

flocculants and polyaluminium chloride.... among other chemicals for treating industrial waste water.

Alum on the other hand is usually a potassium compound.

1. Poly aluminium chloride in water treatment has the characteristics of good coagulation performance, large alum particles, fast settling, low dosage, high efficiency, and wide application range. So it mainly used in treating urban drinking water and all kinds of industrial waste-water. This product can also be used to remove iron, manganese, chromium, lead and other heavy metals in water, fluoride, and oil in water, so it is used to treat printing and dyeing, papermaking, oilfield sewage, urban sewage, and sludge dehydration treatment process. Due to the positive charge of polyaluminum chloride, it has strong adsorption of suspended matter in water. For this reason, it has many advantages such as strong decontamination, high comprehensive efficiency in oil removal and turbidity removal, low cost, etc. It also can be used in casting, medicine, leather, and other fields.

https://www.watertreatment-chemicals.com/poly-aluminium-chloride/