Intermediate Control of Typical High and Moderate Risks

Strategies, activities, and infrastructure

Dehumidify to below 65% RH year-round to eliminate mould and bacterial growth in interior spaces. However, in the north temperate zone, winter humidity levels of heated, occupied buildings will have to be closer to 30% RH to avoid potential mould growth inside insulated wall cavities unless a thoroughly intact vapour barrier is installed. Filtration of fresh air using standard HVAC system (MERV 14 air filtration) (Tétreault 2003) reduces spore concentrations. Install water detection alarms to alert staff if water pooling or flooding happens in susceptible zones of a building.

Strategies, activities, and infrastructure

Use adhesive traps in key locations as a means to conduct a quarterly inspection for insect activity. Conduct an annual visual inspection of collections. Use a household chest freezer as a quarantine treatment method for acquisitions and loans (bag objects).

Strategies, activities, and infrastructure

Use an interior trapping program combined with effective blocking to detect and control rodents. Avoid using poison bait stations because poisoned rodents and some baits support insect pest life. As well, rodents are able to move poisoned bait to other locations despite careful design of the station.

Strategies, activities, and infrastructure

Control as described in the basic level recommendations.

CCI Technical Bulletin Nº 29.