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Silo and Storage Vessel Access Risk Assessment

Silo and Storage Vessel Access Risk Assessment

  • • 100% Compliant with Australian WHS Acts & Regulations
  • • Fully Editable MS Word & PDF Formats Included
  • • Pre-filled Content – Ready to Deploy Immediately
  • • Customisable – Easily Add Your Logo & Site Details
  • • Includes 2 Years of Free Compliance Updates

Silo and Storage Vessel Access Risk Assessment

Product Overview

Identify and control organisational risks associated with Silo and Storage Vessel Access through a structured, management-level WHS Risk Management approach that covers design, operation, maintenance and emergency response. This Risk Assessment supports compliance with the WHS Act, strengthens Due Diligence for Officers, and helps protect your business from operational and legal liability.

Risk Categories & Hazards Covered

This document assesses risks and outlines management controls for:

  • Governance, WHS Duties and Regulatory Compliance: Assessment of officer due diligence, PCBU obligations, consultation arrangements, and the integration of silo and vessel access risks into the wider WHS management system.
  • Design, Engineering and Procurement of Silos and Vessels: Management of design specifications, engineering controls, supplier selection and verification to ensure safe access, inspection and operation over the asset lifecycle.
  • Structural Integrity, Inspection and Maintenance Systems: Systems for periodic inspection, condition monitoring, corrosion control and maintenance planning to prevent structural failure and unsafe access conditions.
  • Access, Egress and Working at Height Systems: Governance of ladders, platforms, walkways, guardrails and fall protection systems, including inspection, certification and safe access planning.
  • Confined Space and Hazardous Atmosphere Management: Protocols for confined space identification, risk assessment, entry permits, atmospheric testing, ventilation and rescue capability for silos and vessels.
  • Silo Loading, Unloading and Overflow Management Systems: Control of filling, discharge, overfilling, bridging, product collapse and pressure hazards through engineered systems, monitoring and operating procedures.
  • Silo Extractor and Mechanical Handling System Controls: Management of augers, conveyors, rotary valves and extraction equipment including guarding, isolation, lock-out/tag-out and interlock systems.
  • Agitated Vessel and Mixing System Management: Assessment of risks from agitators, mixers, rotating equipment and internal mechanisms, including isolation, cleaning and maintenance access controls.
  • Hazardous Chemicals, Dust and Atmosphere Control: Controls for combustible dusts, hazardous chemicals, fumes and vapours, including segregation, ventilation, explosion protection and atmospheric monitoring.
  • Training, Competency and Authorisation: Definition of competency requirements, verification of training, authorisation of personnel and supervision standards for silo and vessel access activities.
  • Procedures, Permits and Documentation Control: Development and control of SOPs, confined space permits, work at height permits and document management to ensure current and consistent practices.
  • Contractor, Transport and Third‑Party Interface Management: Systems for prequalification, induction, supervision and coordination of contractors, transport operators and other third parties working around silos and vessels.
  • Monitoring, Auditing and Performance Review: Implementation of inspections, audits, KPIs and incident reviews to verify effectiveness of controls and drive continuous improvement.
  • Emergency Preparedness, Response and Rescue: Planning for entrapment, engulfment, falls, exposure and structural failure events, including rescue plans, equipment and liaison with emergency services.
  • Change Management and Project Implementation: Management of modifications, upgrades and new installations through formal change control, risk assessment and commissioning processes.

Who is this for?

This Risk Assessment is designed for Business Owners, Operations Managers, Engineers and Safety Professionals responsible for the planning, operation and maintenance of silo and storage vessel facilities and access systems.

Hazards & Risks Covered

Hazard Risk Description
1. Governance, WHS Duties and Regulatory Compliance
  • • Lack of clear allocation of person conducting a business or undertaking (PCBU), officer and worker WHS duties in relation to silos and storage vessels
  • • Inadequate consultation, cooperation and coordination between host employer, contractors, transport operators and maintenance providers
  • • Failure to apply WHS Act 2011 and WHS Regulations to confined spaces, hazardous atmospheres, plant and major hazard facilities where applicable
  • • Absence of formal process to identify which vessels are ‘confined spaces’ and which are not
  • • Inadequate monitoring of regulatory changes, Australian Standards and industry guidance relating to silo and tank access
  • • No documented risk management procedure for silos, agitated vessels and extractor systems
2. Design, Engineering and Procurement of Silos and Vessels
  • • Legacy silo and vessel designs without safe access, work platforms or fall prevention
  • • Inadequate design for safe loading, unloading and overflow prevention
  • • Lack of engineered access ways (stairs, ladders, platforms) compliant with AS 1657
  • • Poor segregation of moving plant, agitators and extraction equipment from access areas
  • • Designs that promote dust accumulation, product bridging or confined space entry for routine tasks
  • • Absence of safe sampling and inspection points from ground level or secure platforms
3. Structural Integrity, Inspection and Maintenance Systems
  • • Undetected corrosion, wall thinning or cracking in silo and tank shells, roofs and supports
  • • Failure of internal structures such as liners, filters, aeration systems and agitation components
  • • Blocked or damaged vents causing over‑pressurisation or implosion during loading and unloading
  • • Unreliable silo extractor systems leading to sudden blockage release or mechanical failure
  • • Inadequate inspection of safety-critical items such as ladders, platforms, anchors and handrails
  • • Absence of a formal system to manage end‑of‑life or decommissioning of deteriorated vessels
4. Access, Egress and Working at Height Systems
  • • Inadequate or non‑compliant ladders, stairs, landings and platforms for access to silo tops and hatches
  • • Lack of safe anchor points or fall arrest systems for work on roofs or elevated areas
  • • Trip, slip and fall hazards caused by poor housekeeping, product spills or weather‑affected surfaces
  • • Restricted or single‑point egress routes from platforms and walkways in an emergency
  • • Uncontrolled access to hazardous zones such as agile roof areas, fragile covers or unguarded openings
  • • Failure of temporary access equipment (ladders, mobile platforms) due to absence of selection and inspection systems
5. Confined Space and Hazardous Atmosphere Management
  • • Unrecognised confined spaces within silos, tanks and agitated vessels leading to asphyxiation or toxic exposure
  • • Development of hazardous atmospheres from fermentation, fumigants, product decomposition or inert gas purging
  • • Entrapment or engulfment in flowing or bridged product during entry
  • • Lack of atmospheric testing and continuous monitoring where required
  • • Inadequate rescue capability for persons entering silos or tanks
  • • Use of agitated vessel interiors as informal workspaces without controls
6. Silo Loading, Unloading and Overflow Management Systems
  • • Overfilling or over‑pressurisation of silos during pneumatic or mechanical loading
  • • Product overflow leading to structural damage, dust exposure or engulfment hazards at ground level
  • • Miscommunication between drivers, control room and operators during loading and unloading
  • • Incorrect selection of silo or tank connection point by transport operators
  • • Insufficient control of loading rates or failure of high‑level alarms and pressure relief devices
  • • Uncontrolled product discharge during unloading due to poor system design or procedures
7. Silo Extractor and Mechanical Handling System Controls
  • • Exposure to moving parts of silo extractor systems, augers, conveyors and rotary valves
  • • Unexpected start‑up of extraction equipment during inspection, cleaning or blockage clearing
  • • Product hang‑ups and bridging leading to uncontrolled release when disturbed
  • • Inadequate guarding or interlocks on hatches, access doors and inspection points
  • • Use of ad‑hoc tools or manual entry to clear blockages in extractors and discharge chutes
  • • Lack of system diagnostics and monitoring for extractor performance
8. Agitated Vessel and Mixing System Management
  • • Contact with moving agitators, paddles or impellers during inspection or cleaning
  • • Unexpected energisation of agitators while workers are inside or on the vessel
  • • Structural failure of baffles, mixers or shaft seals leading to loss of containment
  • • Inadequate isolation of energy sources including electrical, hydraulic and pneumatic supplies
  • • Agitation of hazardous chemicals causing off‑gassing, exothermic reactions or pressure build‑up
  • • Confined space and engulfment hazards within agitated vessels not recognised or controlled
9. Hazardous Chemicals, Dust and Atmosphere Control
  • • Exposure to hazardous chemicals stored or processed within silos and tanks (dusts, liquids, gases)
  • • Combustible dust accumulations leading to fire or explosion in and around silos
  • • Inadequate ventilation and extraction in areas surrounding silo access points
  • • Uncontrolled use of fumigants or inert gases in silos without appropriate monitoring and controls
  • • Lack of Safety Data Sheet (SDS) information integrated into silo access planning
  • • Ignition sources introduced during maintenance or hot work on silos and vessels
10. Training, Competency and Authorisation
  • • Workers and contractors accessing silos and vessels without adequate knowledge of risks and controls
  • • Supervisors not competent to verify controls such as permits, isolation and gas testing
  • • Inadequate training on silo extractor systems, agitated vessels and emergency procedures
  • • Failure to refresh training leading to skill fade and normalisation of deviance
  • • No formal authorisation system for high‑risk roles such as confined space entry supervisor or gas tester
11. Procedures, Permits and Documentation Control
  • • Outdated or inconsistent procedures for silo access, agitated vessel work and extractor operation
  • • Lack of integration between risk assessments, SWMS and permit‑to‑work systems
  • • Workers not having easy access to current procedures at the point of work
  • • Permits becoming a ‘tick and flick’ exercise without meaningful risk review
  • • Poor documentation of deviations, temporary repairs or non‑standard operating conditions
12. Contractor, Transport and Third‑Party Interface Management
  • • Contract drivers and maintenance contractors unaware of site‑specific silo hazards and controls
  • • Inconsistent standards between host site and third‑party operators for loading, unloading and access
  • • Poor coordination during simultaneous operations (e.g. loading while maintenance is underway)
  • • Uncontrolled access of visitors to silo areas and elevated platforms
  • • Limited oversight of subcontractors performing high‑risk activities such as tank cleaning and fumigation
13. Monitoring, Auditing and Performance Review
  • • Failure to detect deterioration in control effectiveness over time
  • • Lack of leading indicators for silo and vessel safety performance
  • • Infrequent or superficial inspections of critical controls such as alarms, interlocks and permits
  • • No systematic review of incidents, near misses or overflow events involving silos
  • • Complacency arising from long periods without a serious event
14. Emergency Preparedness, Response and Rescue
  • • Delayed or ineffective response to engulfment, falls from height or confined space incidents in silos and vessels
  • • Emergency services unable to access silo tops or confined space entry points safely
  • • Lack of specialised rescue equipment suitable for vertical and confined space rescue
  • • Workers unaware of emergency procedures specific to silo overflows, structural instability or product releases
  • • Emergency plans not accounting for after‑hours or remote site operations
15. Change Management and Project Implementation
  • • Unassessed risks introduced by modifications to silos, extractors, agitators or loading systems
  • • Temporary bypassing of safety systems during projects becoming permanent practice
  • • Lack of coordination between engineering, operations and WHS for upgrades or decommissioning
  • • Introduction of new products or materials that alter silo behaviour (e.g. flow, dustiness, reactivity) without review
  • • Insufficient commissioning and handover of new or modified silo systems
16. Health, Fatigue and Human Factors Management
  • • Worker fatigue leading to errors during silo loading, unloading or access activities
  • • Cognitive overload or poor interface design on control panels for extractor and agitation systems
  • • Reduced physical capability or health conditions affecting safe access to heights and confined spaces
  • • Normalisation of unsafe practices, short cuts or bypassing of controls
  • • Inadequate consideration of shift work, remote operations and lone work in silo areas

Need to add specific hazards for your workplace?

Don't worry if a specific hazard isn't listed above. Once you purchase, simply log in to your Client Portal and add your own custom hazards at no extra cost. We take care of the hard work—creating the risk ratings and control measures for free—to ensure your document is compliant within minutes.

Legislation & References

This document was researched and developed to align with:

  • Work Health and Safety Act 2011
  • Work Health and Safety Regulations 2017
  • AS/NZS ISO 31000:2018: Risk management — Guidelines
  • Safe Work Australia – Managing Risks of Plant in the Workplace Code of Practice: Guidance on plant design, guarding, maintenance and safe use.
  • Safe Work Australia – Confined Spaces Code of Practice: Requirements for identifying, assessing and controlling confined space risks in silos and vessels.
  • Safe Work Australia – Managing the Risk of Falls at Workplaces Code of Practice: Guidance on the selection and management of fall prevention and protection systems.
  • Safe Work Australia – Managing Risks of Hazardous Chemicals in the Workplace Code of Practice: Requirements for storage, handling and use of hazardous chemicals associated with silo and vessel operations.
  • AS 1657: Fixed platforms, walkways, stairways and ladders — Design, construction and installation.
  • AS/NZS 1891 (Series): Industrial fall-arrest systems and devices.
  • AS 2865: Confined spaces — Safe working in confined spaces.
  • AS/NZS 60079 (Series): Explosive atmospheres — Requirements relevant to combustible dust and hazardous area management.
  • AS/NZS ISO 45001:2018: Occupational health and safety management systems — Requirements with guidance for use.
Standard Risk Assessment Features (Click to Expand)
  • Comprehensive hazard identification for all activities
  • Risk rating matrix with likelihood and consequence analysis
  • Existing control measures evaluation
  • Residual risk assessment after controls
  • Hierarchy of controls recommendations
  • Action priority rankings
  • Review and monitoring requirements
  • Consultation and communication records
  • Legal compliance references
  • Sign-off and approval sections

$79.5

Safe Work Australia Aligned