To pass, what is the maximum allowable amount of lead in dust samples for window sills?

The maximum allowable amount of lead in dust samples for window sills is established based on guidelines from health authorities, primarily the Environmental Protection Agency (EPA) and the Centers for Disease Control and Prevention (CDC). For window sills, the allowable lead dust level is set at less than 250 micrograms per square foot (µg/ft²).

This threshold is important because window sills are often locations where lead dust can accumulate, particularly in older buildings where lead-based paints may have been used. Maintaining lead dust levels below this limit reduces the risk of lead exposure, which can have serious health consequences, especially for young children and pregnant women.

The other options present different thresholds which exceed the established limit for lead dust concentration on window sills. Such limits aim to ensure a safe environment and reduce the potential for lead poisoning, highlighting a crucial aspect of lead safety regulations.