Which of the following areas is NOT a key concern for lead in interior environments?

The area identified as not a key concern for lead in interior environments is basements. While basements can sometimes have lead-related concerns, such as old plumbing or deterioration of lead-based paint, they generally do not have the same level of exposure risk as other areas highlighted in the choices.

Windows, porches, and friction surfaces are of particular concern due to their high potential for lead contamination. Windows are significant because they often have lead-based paint that deteriorates or can create lead dust from the activities of opening and closing them. Porches can be similarly affected due to wear and tear, especially in older buildings where lead paint was commonly used. Friction surfaces—like those in doors and cabinets—also pose a high risk because they involve activities that generate dust and debris, increasing lead exposure. Understanding these distinctions highlights how lead abatement strategies prioritize areas with the most significant potential for human exposure.