Full containment will be erected to contain the ‘Contained Work Area – Hot-Zone’ before mould removal and remediation activities commence.
Complete isolation of work area from other occupied spaces using plastic sheeting sealed with duct tape or similar materials (including ventilation ducts/grills, fixtures and any other openings)
Negative air machines with HEPA filters to generate negative pressurization.
All contained areas will include properly sealed plastic sheeting on the ceilings, walls and floors, other than the work area where materials are to be removed. Depending on the nature of the project, the work area where mould is to be removed may not require plastic sheeting on the floors. The walls and ceilings with no visible mould growth will have plastic sheeting across the ceiling and from the ceiling down to the floor.
In order to properly seal and create the negative pressure containment the HVAC system may need to be shut down and sealed prior to any remedial activities. As a precaution, and whenever practical, the HVAC system will be shut down regardless of whether this is a necessity. All diffusers, vents and intakes must be completely sealed within the containment areas.
Containment will be erected using fireproof plastic sheeting of the following densities: Ceiling 4 mil, Walls 6 mil and Floors 10 mil (where possible).
Containment will be maintained via negative pressure to a minimum of -0.02 inches of water column. This will be checked and logged daily before and after any
activities inside the contained area as well as periodically during the workday. Containment pressurization will be operated without interruption 24 hours/day until completion.
Containment area will allow a minimum of 4 ACR (air changes) per hour.
All filters used on site will be functioning properly and disposed of as sanitary waste at the end of the work or when necessary to ensure proper functioning. All venting will be done to the outside of the building where possible, using HEPA filters.
All areas will be clearly marked as ‘Regulated Containment Area' and the containment area will be secure at all times.
All surfaces in the contained area including containment barriers will be HEPA vacuumed and cleaned with a damp cloth with a detergent solution and/or Benefect and will be visibly clean prior to the removal of the containment barriers. Three (3) passes of HEPA vacuuming for final cleaning will be performed. All equipment and tools in the containment areas will be cleaned and decontaminated prior to the removal of containment barriers.
Cleaning inside the containment area will be conducted from clean working areas towards dirty areas. Cleaning of walls will be from top to bottom and towards the air filtration device.
Contained area will be free and clear of any debris, dust and mould growth and all surfaces including the containment barriers will have been cleaned as specified at the end of the remediation works.
Access to the containment area will be restricted to qualified personnel, and the Client under supervision, with appropriate Personal Protection Equipment (PPE) only. Unrestricted access and/or occupancy should not occur until the containment area has been cleared. Unauthorized entry into the containment area will void all warranty and liability aspects of the work.
Depending on the nature of the project the containment areas may be video monitored and alarmed in order to ensure security and prevent unauthorized entry.
Vacating people from spaces adjacent to the work area during mould remediation may or may not be necessary depending on the exact nature of the project.