• 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.

• 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