What are the common sources of lead exposure in residential properties?

Lead exposure in residential properties primarily comes from lead-based paint, contaminated soil, and plumbing systems that use lead solder. Lead-based paint was commonly used in homes built before 1978, and deterioration of this paint can produce lead dust and chips, posing a risk, especially to children.

Contaminated soil is often present in urban areas where lead has settled from various sources, including leaded gasoline and industrial emissions. This soil can be tracked into homes or come into direct contact with children playing outside.

Plumbing systems with lead solder can also be a significant source of lead exposure, particularly in older homes where lead was commonly used to join pipes. As water sits in these pipes, lead can leach into the drinking water supply.

The other options do not represent common sources of lead exposure. While asphalt roofs and shingles or wooden window frames may contain elements that can degrade over time, they are not recognized as primary sources of lead exposure. New vinyl siding typically does not contain lead and is a safer option for homes. Understanding these common sources of lead exposure is crucial for proper risk assessment and mitigation in lead abatement practices.