Product Overview

Summary: This SOP provides a clear, step‑by‑step framework for safely managing chemical spills that occur on roofs, including solar installations, plant platforms and service roofs. It helps Australian businesses control environmental and fall-from-height risks, protect workers and building occupants, and demonstrate due diligence under WHS legislation when dealing with hazardous substances at height.

Chemical spills on roofs present a unique combination of hazards: exposure to hazardous substances, environmental contamination via stormwater systems, and the ever‑present risk of falls from height. This Safe Operating Procedure is specifically designed for rooftop environments where chemicals such as cleaning agents, water treatment chemicals, HVAC refrigerants, fuel, sealants, or solar battery electrolytes may be used, stored or transported. It sets out a consistent, defensible method for identifying the spill, isolating the area, implementing controls, and coordinating a safe and compliant clean‑up while working at height.

The document helps organisations translate their chemical management and working‑at‑heights policies into practical actions that frontline workers can follow under pressure. It addresses the complexities of roof access, fragile surfaces, drainage points, confined plant areas and proximity to public spaces below. By implementing this SOP, businesses can reduce the likelihood of uncontrolled releases into stormwater, prevent slips and falls, and ensure that only trained personnel undertake clean‑up activities using appropriate PPE, spill kits and fall protection. It also supports compliance with Australian WHS legislation, hazardous chemicals regulations and environmental protection requirements, providing clear records of how rooftop chemical incidents are managed.

Key Benefits

• Ensure a rapid, structured and safe response to chemical spills occurring on roofs or elevated plant platforms.
• Reduce the risk of worker injury from hazardous chemicals, slips, trips and falls during spill response activities.
• Protect stormwater systems, building occupants and the surrounding environment from uncontrolled chemical releases.
• Demonstrate compliance with WHS and environmental obligations through a documented, repeatable response process.
• Standardise training so all rooftop workers know their roles, limits of authority and when to escalate to emergency services or specialist contractors.

Who is this for?

• Facilities Managers
• WHS Managers
• Maintenance Supervisors
• Roofing Contractors
• HVAC Technicians
• Solar PV Installers
• Plumbers and Roof Plumbers
• Site Managers
• Emergency Wardens
• Health and Safety Representatives (HSRs)

Hazards Addressed

• Exposure to hazardous chemicals (corrosive, toxic, flammable or environmentally hazardous substances)
• Inhalation of chemical vapours, fumes or aerosols in poorly ventilated rooftop plant areas
• Skin and eye contact with corrosive or irritant substances during spill containment and clean‑up
• Slip hazards from spilled liquids on sloped or wet roof surfaces
• Falls from height while responding to spills near roof edges, skylights or fragile roofing materials
• Fire and explosion risks from flammable liquids or gases on roofs near ignition sources
• Environmental contamination via roof drains, gutters and stormwater systems
• Manual handling injuries when deploying spill kits, barriers or temporary containment
• Heat stress and UV exposure during prolonged spill response on exposed roofs

Included Sections

• 1.0 Purpose and Scope – Rooftop Chemical Spill Response
• 2.0 Definitions and Types of Rooftop Chemical Spills
• 3.0 Roles and Responsibilities (PCBU, Supervisors, Workers, Emergency Wardens)
• 4.0 Pre‑Planning and Roof Risk Assessment Requirements
• 5.0 Rooftop Chemical Inventory, SDS Access and Spill Risk Profiling
• 6.0 Required Training and Competency for Spill Responders at Height
• 7.0 Required PPE, Spill Kits and Fall Protection Equipment
• 8.0 Initial Response: Assess, Alert, Isolate and Make Safe
• 9.0 Working at Height Controls During Spill Response
• 10.0 Spill Containment on Roofs (Drains, Gutters and Run‑off Control)
• 11.0 Spill Clean‑up Procedures by Chemical Type (Corrosive, Flammable, Toxic, Environmental Hazard)
• 12.0 Decontamination of Area, Tools and Equipment
• 13.0 Waste Handling, Labelling and Disposal in Line with Environmental Requirements
• 14.0 Communication, Notifications and Escalation (Internal, Regulator, Emergency Services)
• 15.0 Incident Reporting, Investigation and Corrective Actions
• 16.0 Inspection, Maintenance and Location of Rooftop Spill Kits
• 17.0 Document Control, Review and Continuous Improvement

Legislation & References

• Work Health and Safety Act 2011 (Cth) and corresponding state and territory WHS Acts
• Work Health and Safety Regulations 2011 (Cth) – Hazardous Chemicals and Falls
• Safe Work Australia – Code of Practice: Managing Risks of Hazardous Chemicals in the Workplace
• Safe Work Australia – Code of Practice: Managing the Risk of Falls at Workplaces
• Safe Work Australia – Code of Practice: How to Manage Work Health and Safety Risks
• AS 1940: The storage and handling of flammable and combustible liquids
• AS/NZS 1891 series: Industrial fall-arrest systems and devices
• AS/NZS 1715: Selection, use and maintenance of respiratory protective equipment
• AS/NZS 2161 series: Occupational protective gloves
• Relevant state and territory environmental protection legislation and stormwater pollution guidelines