Jean Tétreault

Canadian Conservation Institute

SUMMARY OF CONTROL PROCEDURES TO PREVENT DAMAGES CAUSED BY CONTAMINANTS

AVOID damage by evaluating the potential interactions between objects and pollutants - evaluate potential interactions between objects and pollutants AVOID indoor sources - carefully select and use products - minimize the presence or the generation of pollutants AVOID outdoor source - minimize the presence and the generation of pollutants

BLOCK transfer (deposition or sorption) of pollutants on objects - block contact between object and product containing pollutants - apply a barrier film on objects' surface BLOCK emission of pollutants from products - apply a barrier film on products's surface BLOCK infiltration of pollutants in enclosures - use airtight enclosures - use filtered positive pressure systems BLOCK infiltration of pollutants in rooms/building - install objects into airtight non-emissive enclosures - insert efficient vapour phase and particle filters in the HVAC system

DETECT deteriorations - inspect signs of deterioration on objects and on enclosures' and building's products DETECT pollutants in enclosures and in rooms/building - do in situ monitoring of pollutants DETECT other reactants, catalysts, temperature and radiation in enclosures and in rooms/building - monitor the other reactants, catalysts, temperature and radiations

RESPOND to the reactivity of pollutants on objects - reduce minor reactants and catalysts involved in the deterioration processes - reduce the temperature and the radiations - reduce the exposure time RESPOND to the pollutants present in products - removal of the pollutants from the product - neutralization of the pollutants in the product RESPOND to high level of pollutants in enclosures - reduce pollutants' level - reduce other reactants' and catalysts' level involved in the generation of pollutants - reduce the temperature and the radiations RESPOND to high level of pollutants in rooms/building - reduce pollutants' level - reduce other reactants' and catalysts' level involved in the generation of pollutants - reduce the temperature and the radiations RESPOND to the detection of pollutants or damage on objects - protect objects from the harmful environment or from contaminated surfaces - apply mitigation procedures - reevaluate the Avoid, Block and Detect strategies

TREAT damaged objects - treat objects for limiting further damage