Laboratory Biocontainment (PC2/PC3) Fit-Out SWMS

Laboratory biocontainment fit-out is the specialist work that builds a PC2 or PC3 physical-containment laboratory: sealed surfaces, directional airflow and a pressure cascade, HEPA filtration, biosafety-cabinet installation and penetration sealing, including the refit of used containment spaces. The dominant hazards are electric shock connecting biosafety cabinets, fans, HEPA housings and controls, exposure to residual biological contamination in a used containment space, HEPA filter handling, falls installing ceiling HEPA housings and ducting, a confined ceiling or plenum space, and a compromised pressure cascade or containment failure at handover. This SWMS covers the containment fit-out, sealing, airflow, HEPA and biosafety-cabinet installation; it does not cover the laboratory's containment design, the research program it houses, or the certification of the facility's biosafety level, which are documented separately.

Under the model Work Health and Safety Act 2011 and the harmonised Work Health and Safety Regulations adopted in each state and territory, this is high risk construction work because it is carried out on or near energised electrical services, in or near a confined ceiling or plenum space, where a person can fall more than two metres, and in an area requiring respiratory protection from residual biological contamination; Victoria operates the equivalent provisions under the Occupational Health and Safety Act 2004 and Occupational Health and Safety Regulations 2017. Microbiological safety and containment follow AS/NZS 2243.3, cleanroom and biosafety-cabinet verification follow AS 1807, and the cabinet, fan and control connections follow AS/NZS 3000. On a refit, a certified decontamination and a clearance certificate are required before work begins.

Failure to meet the primary duty of care is prosecuted under the Category 1 to 3 offences in the Work Health and Safety Act (and the equivalent provisions in Victoria's Occupational Health and Safety Act 2004), with maximum penalties indexed in most jurisdictions, imprisonment available for individuals, and a separate industrial manslaughter offence; current figures follow the prevailing penalty schedule of the responsible state regulator. This document is structured to satisfy the safe work method statement content requirements of the harmonised regulations and documents a controlled fit-out and containment commissioning.

Hazards identified

10 hazards covered, sorted by priority.

Control measures

Hierarchy-of-controls order: elimination → substitution → isolation → engineering → administrative → PPE.

1. 1Elimination: Isolate and lock out before connecting cabinets, fans, HEPA housings and controls, test before touch, and use a licensed electrician under permit; use insulated tools.
2. 2Elimination: Require a certified decontamination or fumigation and a clearance certificate before works in a used containment space, per AS/NZS 2243.3; wear the personal protective equipment the clearance specifies.
3. 3Engineering: Use bag-in and bag-out HEPA filter handling, treating used filters as contaminated and disposing of them as clinical or hazardous waste; wear a P3 respirator and gloves.
4. 4Engineering: Use an elevating work platform or scaffold with edge protection for ceiling HEPA housings, ducting and services, with a fall-arrest harness where a residual fall risk remains.
5. 5Elimination: Work from outside the ceiling or plenum space where possible; otherwise ventilate and use a confined-space permit where it applies.
6. 6Engineering: Use mechanical aids for biosafety cabinets, fans and heavy housings, with two-person handling; wear gloves and footwear.
7. 7Substitution: Use low-volatile-organic-compound products, with ventilation and local exhaust and safety-data-sheet controls; wear a respirator and gloves.
8. 8Engineering: Handle sheet metal, glass and existing labware safely, with housekeeping; wear cut-resistant gloves.
9. 9Engineering: Commission airflow with smoke and pressure testing, and certify the biosafety cabinet to AS 1807 and AS/NZS 2243.3 before handover.
10. 10Engineering: Keep access clear with housekeeping; wear safety footwear.

Applicable Codes of Practice

High-Risk Construction Work triggered

Worked example

A containment contractor is fitting out a PC3 physical-containment laboratory: sealing the surfaces, installing the directional-airflow and pressure-cascade ductwork, the ceiling HEPA housings, the biosafety cabinets and the penetration sealing, including a refit of part of a used containment space. The work is high risk construction work because it is on or near energised electrical services, in or near a confined ceiling plenum, at a height where a person can fall more than two metres, and in an area requiring respiratory protection from residual biological contamination, so the contractor builds the safe work method statement around these limbs. Before any work in the used containment space, a certified decontamination or fumigation is carried out and a clearance certificate is issued to AS/NZS 2243.3, because residual biological agents would otherwise expose the trades. The biosafety cabinets, fans, HEPA housings and controls are connected only after isolation and lock-out by a licensed electrician who tests before touch, and used HEPA filters are removed by bag-in and bag-out handling, treated as contaminated and disposed of as clinical or hazardous waste with a P3 respirator. Ceiling HEPA housings, ducting and services are installed from an elevating work platform with edge protection, the ceiling plenum is worked from outside where possible or under a confined-space permit, and heavy cabinets and housings are moved with mechanical aids and two-person handling. Sealants and coatings are low-volatile-organic-compound products applied with ventilation and local exhaust in the sealed room. At handover the airflow is commissioned with smoke and pressure testing and the biosafety cabinet is certified to AS 1807 and AS/NZS 2243.3, confirming the pressure cascade and containment. Workers sign on to the statement before starting, the decontamination clearance and commissioning records are kept, and the signed statement is held on site for the responsible state regulator.

Related legislation

• Work Health and Safety Act 2011 (harmonised; enacted in all states and territories except Victoria, which applies the Occupational Health and Safety Act 2004), s.19 — Primary duty of care to workers and to other persons at or near the workplace
• Harmonised Work Health and Safety Regulations, section 291 — Defines high risk construction work (Victoria: Occupational Health and Safety Regulations 2017, Part 5.1)
• Harmonised Work Health and Safety Regulations, section 299 — Content and review requirements for a safe work method statement for high risk construction work (Victoria: regulation 327; Tasmania: regulation 312)
• Harmonised Work Health and Safety Regulations, Part 4.7 — Electrical safety: the prohibition on energised electrical work except where de-energising is not reasonably practicable and the prescribed conditions are met (Victoria applies the Occupational Health and Safety Regulations 2017 and state electrical-safety legislation)
• Harmonised Work Health and Safety Regulations — Confined spaces: entry permit, atmospheric monitoring, standby and rescue duties (Victoria applies the Occupational Health and Safety Regulations 2017)
• AS/NZS 2243.3 and biosafety requirements — Containment-level controls, directional airflow, and a certified decontamination with a clearance certificate before work in a used containment space

Frequently asked questions