Product Overview

Summary: This Methane Gas Monitoring and Control SOP sets out a clear, defensible system for detecting, assessing, and controlling methane risks in Australian workplaces. It helps your organisation prevent explosions, fires, and asphyxiation events while demonstrating strong compliance with WHS legislation and industry standards.

Methane is a colourless, odourless, highly flammable gas that can accumulate rapidly in underground workings, confined spaces, and poorly ventilated areas. In industries such as underground coal mining, oil and gas, tunnelling, wastewater treatment and landfill operations, methane presents a critical risk of explosion, fire and asphyxiation if not rigorously controlled. This Methane Gas Monitoring and Control Safe Operating Procedure provides a structured, step‑by‑step approach to identifying methane risk areas, conducting effective atmospheric monitoring, interpreting readings, and implementing timely control actions.

The procedure translates Australian WHS obligations into practical on‑site instructions, covering everything from selection and calibration of gas detection equipment through to ventilation controls, hot‑work restrictions, exclusion zones, and emergency response triggers. It supports supervisors and workers to make consistent, evidence‑based decisions when methane levels change, reducing reliance on informal practices or individual judgement. By embedding this SOP into your operations, you create a robust, auditable system that helps prevent catastrophic incidents, protects workers and contractors, and provides clear documentation to demonstrate compliance during inspections, audits and incident investigations.

Key Benefits

• Ensure consistent, reliable methane monitoring across all high‑risk work areas and activities.
• Reduce the likelihood of explosions, fires and asphyxiation incidents associated with methane accumulation.
• Demonstrate compliance with Australian WHS legislation, mining regulations and relevant standards.
• Standardise training and expectations for supervisors, operators and contractors working in methane‑prone environments.
• Improve response times and decision‑making through clear action thresholds, escalation pathways and emergency steps.

Who is this for?

• WHS Managers
• Site Supervisors
• Underground Mine Managers
• Gas Drainage Engineers
• Drilling Supervisors
• Operations Managers
• Health and Safety Representatives (HSRs)
• Maintenance Supervisors
• Facilities Managers in Waste and Landfill Operations
• Oil and Gas Production Supervisors

Hazards Addressed

• Methane gas accumulation leading to explosion or fire
• Asphyxiation due to oxygen displacement by methane in confined or poorly ventilated spaces
• Ignition of flammable atmospheres by electrical equipment, hot work or static discharge
• Unexpected methane releases during drilling, cutting, excavation or longwall operations
• Exposure to hazardous atmospheres during entry to underground workings, tanks, sewers or sumps
• Equipment failure or inaccurate readings due to poorly maintained or uncalibrated gas detectors
• Vehicle and plant operation in areas with flammable gas concentrations

Included Sections

• 1.0 Purpose and Scope
• 2.0 Definitions and Abbreviations (LEL, UEL, ppm, %CH₄, intrinsically safe, etc.)
• 3.0 Applicable Legislation, Standards and References
• 4.0 Roles and Responsibilities (PCBU, Mine Manager, Supervisors, Workers, Contractors)
• 5.0 Methane Hazard Identification and Risk Assessment
• 6.0 Methane Monitoring Strategy (fixed systems, portable detectors, sampling locations and frequencies)
• 7.0 Gas Detection Equipment Requirements (selection, certification, storage and limitations)
• 8.0 Calibration, Bump Testing and Maintenance of Gas Detectors
• 9.0 Pre‑Start Checks and Verification of Monitoring Systems
• 10.0 Step‑by‑Step Operating Procedure for Methane Monitoring
• 11.0 Action Levels, Alarm Set‑Points and Required Controls (including LEL‑based response table)
• 12.0 Ventilation and Engineering Controls for Methane Management
• 13.0 Administrative Controls, Permits and Work Authorisation (including hot work and confined space entry)
• 14.0 Communication, Reporting and Escalation Requirements
• 15.0 Emergency Response Procedures for Elevated Methane Readings
• 16.0 Incident Reporting, Investigation and Corrective Actions
• 17.0 Training, Competency and Authorisation Requirements
• 18.0 Recordkeeping, Data Trending and Audit Requirements
• 19.0 Document Review, Continuous Improvement and Version Control

Legislation & References

• Work Health and Safety Act 2011 (Cth) and corresponding state and territory WHS Acts
• Work Health and Safety Regulations 2011 (Cth) and equivalent state and territory regulations
• Work Health and Safety (Mines and Petroleum Sites) legislation – applicable state and territory laws (e.g. NSW WHS (Mines and Petroleum Sites) Regulation 2014)
• Safe Work Australia – Code of Practice: Confined Spaces
• Safe Work Australia – Code of Practice: Managing Risks of Hazardous Chemicals in the Workplace
• Safe Work Australia – Code of Practice: Managing the Risk of Plant in the Workplace
• AS/NZS 60079 series: Explosive atmospheres (selection and use of equipment in hazardous areas)
• AS/NZS 2290.3: Electrical equipment for coal mines – Introduction, inspection and maintenance – Gas detecting and monitoring equipment
• AS/NZS 1715: Selection, use and maintenance of respiratory protective equipment
• AS/NZS 2865: Confined spaces