Exposure may occur when there is contact with the caulk and any surrounding porous materials into which the PCBs may have been released (e.g., brick, concrete, wood). PCBs may also be released into the soil from exterior caulk, particularly as the caulk weathers, and there may be potential exposure for individuals who frequent adjacent play areas or gardens.
Caulk that is not intact and is peeling, brittle, cracking or deteriorating visibly in some way will have the highest potential for release of PCBs. Caulk would generally be characterized of lesser concern if it appears completely visually intact to the observer and does not have any signs of deterioration.
Indoor air quality may also be affected by PCBs from caulk to a limited extent. PCBs can slowly vaporize from caulk and be inhaled, and caulk dust particles can come into contact with people in the building and enter the air handling system, and move to other areas of the building.
Steps should be taken to minimize long-term exposures.
Should I be concerned about PCBs in caulk?
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