Cold Room / Cold Storage Work SWMS
Working in sub-zero environments (−18°C to −30°C) — entry/exit procedures, hypothermia controls, lone-worker check-in, door seal integrity, emergency release, ammonia + CO2 refrigerant leak response. Applies to warehousing and food-processing cold stores.
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This SWMS covers the full scope of worker occupancy inside Australian industrial cold-storage environments — chilled stores at +2°C to +6°C, freezer stores at −18°C to −30°C, blast freezers below −30°C, refrigerated cross-dock bays, and temperature-controlled picking faces in 3PL distribution centres, food-processing cold stores, pharmaceutical cold chain warehouses, and ice-cream and meat cold-chain facilities. It is written for the forklift and pallet-truck drivers who pick inside the freezer, the QA and inventory staff who perform temperature-logged audits, the maintenance technicians who enter the cold room to service evaporator coils or door seals, and the PCBU whose primary duty of care extends to every person on the cold-side of the air curtain. Every control in this document has been authored against the Model WHS Regulation 2025 Part 7.1 Hazardous Chemicals, Part 4.5 Plant, and the Code of Practice: Managing the Work Environment and Facilities (SafeWork Australia, 2020), with additional reference to AS/NZS 5149 Refrigeration Systems and Heat Pumps, AS 4077 Industrial Refrigeration — Safety, the WorkSafe Victoria and SafeWork NSW cold-exposure guidance, and SafeWork SA's Cold Storage Facilities guidance as the canonical national reference.
Cold-store work is not a listed High Risk Construction Work activity under Schedule 1 of the WHS Regulation and therefore does not trigger the mandatory HRCW SWMS obligation under Section 299. However, cold-store activity carries compounded duty under three regulatory streams simultaneously: Part 7.1 Hazardous Chemicals imposes duties where ammonia (R717) or carbon dioxide (R744) refrigerants are present, Part 4.5 Plant imposes duties in relation to the refrigeration plant and the MHE that operates inside the cold zone, and Section 19 of the WHS Act imposes the primary duty of care on the PCBU for lone-worker, hypothermia, and emergency-release risk. A documented SWMS remains the most defensible evidentiary record that all three streams have been assessed together. The North Star Cold Storage ammonia-leak evacuation in Victoria in 2018 is the commonly cited Australian precedent: a refrigerant release from a roof-mounted ammonia plant forced an evacuation of the facility, triggered a WorkSafe investigation, and exposed deficiencies in the facility's emergency response and refrigerant-monitoring programme. SafeWork SA's Cold Storage Facilities guidance page remains the authoritative national reference in the absence of a dedicated code of practice, and both SafeWork NSW and WorkSafe Tasmania publish cold-environment hazard pages that this SWMS aligns to.
Hazards identified
12 hazards covered, sorted by priority.
Core-temperature drop below 35°C leading to impaired judgement, cardiac arrhythmia, and loss of consciousness during extended picking or maintenance shifts.
Tissue damage and permanent injury to extremities from bare-skin contact with metal surfaces below −10°C or prolonged exposure without rated PPE.
Acute pulmonary oedema, chemical burns, and potential fatality at concentrations above 300 ppm; ammonia is toxic, flammable, and detectable by odour at 5 ppm but disabling before that threshold.
Asphyxiation and loss of consciousness from oxygen displacement; CO2 is heavier than air and accumulates at floor level, where lone workers are found unresponsive.
Delayed rescue and progression from recoverable cold stress to fatal hypothermia because no one is aware the worker has stopped moving inside the freezer.
Worker trapped inside sub-zero environment; emergency release that has frozen, been painted over, or mechanically seized is a recognised cold-store failure mode.
Fractures, concussion, and crush injury from a fall in front of moving MHE; ice accretion around doors is the most frequently reported cold-store slip cause.
Manual-handling injury during load break, pallet assembly, or dropped product at sub-zero temperatures; ManTRA scoring confirms force and posture risk rises sharply below 0°C.
Pedestrian–MHE collision during the first 30–60 seconds after crossing the air curtain, while goggles, safety glasses, and cabin windows are fogged.
Heart attack, angina, or asthma attack in susceptible workers whose pre-existing condition is exacerbated by cold-driven peripheral vasoconstriction.
Worker stranded in sub-zero environment without an extraction path, compounded if the breakdown blocks an egress aisle.
Fatigue-driven errors, shortcutting of cold-exposure rotation, and mental health harm from extended overnight cold-pick shifts under KPI pressure.
Control measures
Hierarchy-of-controls order: elimination → substitution → isolation → engineering → administrative → PPE.
- 1Eliminate worker occupancy in the coldest zones where reasonably practicable — use automated storage and retrieval systems (ASRS), pallet shuttles, and pick-to-light drop-off at ambient staging zones for high-frequency SKUs.
- 2Apply a documented cold-exposure rotation matrix to limit single-session exposure: maximum 50–55 minutes continuous at −18°C to −25°C before a minimum 15-minute warm-up break in a +18°C rest room; shorter exposure for freezer-blast zones below −30°C.
- 3Operate a mandatory two-person or 15-minute radio check-in rule for every cold-zone entry below 0°C. Any missed check-in triggers an extraction response within 5 minutes. Personal duress alarms (man-down sensors) are issued for every lone-worker task.
- 4Install engineered internal door release on every cold-store and freezer door per AS 4077 and AS/NZS 5149 principles, tested weekly and recorded on a door-release register. The release mechanism is painted hi-vis, unobstructed, and operable with gloved hands at −30°C.
- 5Install and monitor refrigerant leak detection at cold-store floor level (CO2) and at cold-store ceiling or plant-room level (ammonia) with audible and visual alarms inside and outside the zone, linked to automated ventilation and a documented evacuation plan.
- 6Maintain refrigerant plant per AS/NZS 5149 and AS 4077 — annual inspection by a licensed refrigerant technician holding an ARCtick authorisation; documented maintenance log; SDS for every refrigerant on-site; emergency response plan rehearsed at least annually.
- 7Issue rated cold-environment PPE: insulated freezer jacket and bib-trouser rated to −30°C, thermal balaclava and beanie, insulated steel-cap boots to AS/NZS 2210.3, two-layer thermal gloves (inner liner plus grip-rated outer), and Class D/N hi-vis overlay to AS/NZS 4602.1.
- 8Conduct pre-entry medical screening at induction — exclude workers with uncontrolled cardiovascular, respiratory, or Raynaud's conditions from regular cold-zone work; provide toolbox education on hypothermia, frostbite, and cold-exhaustion recognition for all entrants.
- 9Maintain internal illuminance above 160 lux at the working plane in freezer stores and above 300 lux at pick-face positions, per AS/NZS 1680.2.4, with defrost-cycle timing that does not leave workers in low-light conditions.
- 10Apply an anti-slip regime at cold-zone door thresholds: daily ice-scrape, weekly steam removal of built-up frost, high-friction floor strips at the air-curtain line, and a temporary stop-work if ice builds to more than 5 mm at the doorway.
- 11Limit MHE presence in the cold zone to battery-rated equipment and maintain a cold-zone battery log — full-charge at shift start, swap-at-50% protocol, and dedicated charging bay ventilated to dissipate hydrogen per AS/NZS 60335-2-29.
- 12Apply Hazardous Manual Tasks assessment (ManTRA or equivalent) at every pick-face where workers perform more than 40 lifts per hour below 0°C; redesign pick-face height, pallet weight, and case count where ManTRA scores exceed threshold.
- 13Apply psychosocial controls per WHS Regulation r55A-55D: cold-shift rotation that does not exceed 4 consecutive nights, supervisor authority to pull a worker from cold without penalty, scheduled peer-check-in, and a no-blame near-miss reporting pathway.
- 14Consult with workers per Section 47 of the WHS Act on cold-zone shift patterns, exposure rotation, PPE fit, and the emergency response plan. Record Health and Safety Representative input and any worker-raised concerns.
- 15Emergency response baseline: trapped-worker rescue procedure, refrigerant leak evacuation plan, first-aid for hypothermia and frostbite (gradual rewarming, not direct heat), and contact details for the local refrigeration contractor and emergency services posted at every cold-zone entry.
- 16Daily pre-start toolbox talk covering scope, expected cold-zone duration, rotation schedule, lone-worker pairings, refrigerant-alarm status, and door-release test confirmation. Record attendance and any worker-raised issues.
Applicable Codes of Practice
Binding guidance on the storage, handling, labelling, and emergency response for ammonia (R717) and CO2 (R744) refrigerants; SDS, manifest, and placard duties applicable to the refrigeration plant room.
Covers thermal comfort, temperature controls, lighting, rest facilities, and emergency access applicable to cold-store and freezer environments.
Applies to repetitive pick, load-break, and pallet-assembly tasks performed at reduced temperature where dexterity, grip, and force are compromised.
Applies to the refrigeration plant, evaporator and condenser equipment, and to any MHE operating inside the cold zone.
Technical standard governing refrigeration system design, safety classifications, leak-detection, ventilation, and emergency-release requirements.
Safety standard specifically for industrial refrigeration personnel covering PPE, training, and emergency procedures in ammonia and CO2 systems.
Minimum illuminance requirements for cold-store pick-face, aisle, and maintenance tasks.
Who this is for
- →3PL, food-processing, and pharmaceutical cold-store PCBUs operating chilled, freezer, or blast-freezer environments with regular worker occupancy.
- →Forklift, reach-truck, and electric pallet-truck drivers picking and put-away inside the cold zone below 0°C.
- →Refrigeration and facilities technicians performing planned or reactive maintenance on evaporators, doors, and plant-room equipment.
- →QA, inventory, and compliance staff performing temperature-logged audits and sampling inside the cold zone.
- →WHS coordinators and refrigeration-plant supervisors preparing for WorkSafe audit, insurer review, or customer cold-chain certification.
What you receive
- ✓Editable Microsoft Word document (.docx, Word 2016 or newer compatible), delivered within 24 hours of purchase.
- ✓Title page with PCBU name, ABN, site address, cold-zone identifiers, refrigerant type, and revision date fields.
- ✓Signed approval block for PCBU, refrigeration-plant supervisor, and nominated cold-zone safety officer.
- ✓Hazard register with the 12 hazards above, each scored on a 5x5 likelihood-consequence matrix with inherent and residual risk.
- ✓Hierarchy-of-control measures cross-referenced to the WHS Regulation Parts 4.5 and 7.1, AS/NZS 5149, AS 4077, and the Managing Work Environment and Facilities Code of Practice.
- ✓Cold-exposure rotation matrix template with zone temperature, maximum continuous exposure, warm-up duration, and PPE requirement.
- ✓Lone-worker check-in protocol template, duress-alarm register, and emergency extraction procedure for trapped workers.
- ✓Refrigerant emergency response plan template covering ammonia (R717) and CO2 (R744) leak scenarios, evacuation routes, and external notification.
- ✓Worker sign-on register and consultation record template for HSR sign-off and worker input per Section 47 of the WHS Act.
- ✓Legislation schedule pre-populated for NSW with variance table for VIC, QLD, SA, WA, TAS, NT, ACT; emergency contacts, hypothermia and frostbite first-aid chart, and review-and-update log.
Worked example
A 3PL cold-storage facility in Melbourne runs a two-shift freezer-pick operation at −22°C serving evening grocery despatch. The B-shift lead forklift driver commences a 55-minute continuous pull at 22:10, paired with a second driver in the same aisle under the 15-minute radio check-in protocol on UHF channel 4. Both drivers wear insulated freezer jackets and bib-trousers rated to −30°C, thermal balaclavas, two-layer gloves with grip-rated outer, AS/NZS 2210.3 insulated steel-cap boots, and Class D/N hi-vis overlays. Each carries a thermal wrist monitor and a personal duress alarm. At 22:55 the rotation matrix triggers a 15-minute warm-up in the +18°C rest room, and both drivers hand over to the next pair. Weekly emergency door-release testing is scheduled every Sunday at 06:00 — the maintenance technician verifies the internal release on every door and records the result on the door-release register. The ammonia leak-detection alarm is tested monthly against a bottled-ammonia source in the plant room, logged against the ARCtick technician's maintenance sheet. When a shift worker reports numbness in a gloved finger twelve minutes into a pull on a −30°C blast freezer, the supervisor pulls her from the zone under the no-blame protocol; she is medically screened and returned to an ambient pick-face for the remainder of the shift.
Related legislation
- Work Health and Safety Act 2011 (NSW) — Section 19 primary duty of care; Section 27 officer due diligence; Section 47 worker consultation; duty to provide information, training, and supervision.
- WHS Regulation 2025 (NSW) — Part 3.1 (risk management), Part 4.5 (plant), Part 7.1 (hazardous chemicals — ammonia and CO2 refrigerant duties), r55A-55D (psychosocial hazards).
- Ozone Protection and Synthetic Greenhouse Gas Management Act 1989 (Cth) — ARCtick refrigerant handling licence for technicians servicing the plant.
- Food Standards Australia New Zealand (FSANZ) Standard 3.2.2 — food-safety temperature duties that interact with this SWMS where the cold store is used for food storage.
- Environmental Protection Act (state equivalents) — refrigerant emission and plant-room emergency-release duties at the facility boundary.
- Safe Work Australia — Workplace Exposure Standards (transitioning to WEL on 1 December 2026) applicable to ammonia short-term and long-term exposure limits.
Frequently asked questions
Why isn't this SWMS flagged as High Risk Construction Work?
Cold-store worker occupancy is not listed in Schedule 1 of the WHS Regulation as HRCW, so the mandatory Section 299 SWMS obligation does not apply. However, the PCBU's duty under Section 19 of the WHS Act, the Part 7.1 hazardous chemical duties for refrigerants, and the Part 4.5 plant duties for the refrigeration system mean a documented SWMS is the most defensible way to evidence risk management. WorkSafe investigators consistently cite the absence of documented cold-exposure and refrigerant-leak procedures in post-incident prosecutions.
Does this cover ammonia (R717) and CO2 (R744) refrigerants, or only one?
It covers both. Ammonia is toxic and flammable with an odour threshold of 5 ppm and an immediately dangerous to life and health (IDLH) concentration around 300 ppm; CO2 is an asphyxiant that accumulates at floor level. The SWMS addresses both leak-detection strategies, both evacuation patterns, and the SDS for both. Where your facility operates only one refrigerant type, delete the unused scenario from the emergency response plan before issuing.
Can I use this SWMS for food-processing cold rooms, not just 3PL warehousing?
Yes. The worker-occupancy controls — cold-exposure rotation, lone-worker check-in, emergency door release, refrigerant response — apply equally to food-processing cold rooms, meat and dairy cold chains, and ice-cream stores. FSANZ Standard 3.2.2 temperature duties add a food-safety overlay but the worker-safety controls are the same. Remove or retain the MHE-in-cold-zone controls depending on whether forklifts operate in your cold zone.
Can I use this SWMS in Victoria under the OHS Act?
Yes, as a starting point. Victoria operates under the OHS Act 2004 and OHS Regulations 2017, and WorkSafe Victoria administers the refrigeration-plant and cold-environment duties. Swap the legislation schedule for Victorian equivalents and cite the WorkSafe Victoria Workplace Amenities Compliance Code and the Hazardous Substances Compliance Code in place of the SafeWork Australia codes. The 2018 North Star Cold Storage ammonia-leak evacuation is a Victorian precedent underpinning the refrigerant-response section of this SWMS.
How often does this SWMS need to be reviewed?
At minimum every 12 months; after any refrigerant leak, trapped-worker incident, or cold-stress event; whenever the refrigeration plant is modified or a new refrigerant is introduced; whenever cold-zone layout, shift pattern, or PPE specification changes; and when regulatory guidance updates — including the 1 December 2026 Workplace Exposure Limits transition and any update to AS/NZS 5149 or AS 4077.
Is this document editable and suitable for my branding?
Yes. The DOCX includes editable header and title-page fields for company name, ABN, logo, site address, refrigerant type, and supervisor details. All body text is editable in Microsoft Word. Replace generic PCBU and site fields before issuing to workers or auditors, and delete the ammonia or CO2 section that does not apply to your refrigeration plant.
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