- Maintain guardrails and edge protection around all ASP tanks at all times.
- Wear a personal flotation device within 2 metres of tank edges.
- Ensure rescue equipment including life rings and throw lines is in place.
- Isolate and lock out aerators and mixers before work near moving parts.
- Wash hands thoroughly before eating or drinking after sewage contact.
- Cover all cuts with waterproof dressings before starting work.
- Monitor for H2S and ammonia when working on or near ASP tanks.
- Keep walkways and handrails clean and free of slippery biofilm.
- Follow the permit to work system for all ASP maintenance tasks.
- Ensure tetanus and hepatitis vaccinations are up to date.
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- DON'T remove guardrails around ASP tanks without a permit.
- DON'T lean over tank edges or stand on non-designated surfaces.
- DON'T enter an ASP tank without a confined space procedure.
- DON'T work near aerators or mixers without confirmed isolation.
- DON'T eat, drink, or smoke near ASP tanks without washing first.
- DON'T ignore cuts or abrasions — cover them to prevent infection.
- DON'T assume walkways are non-slip — biofilm builds up rapidly.
- DON'T attempt rescue from an aerated tank without specialist equipment.
- DON'T ignore symptoms of illness after sewage exposure — seek medical advice.
- DON'T bypass the permit to work system for any ASP task.
See also: Wastewater Treatment Works Safety Awareness | Drowning Prevention and Water Safety
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