Which conditions must be present to identify a friction surface hazard?

To identify a friction surface hazard, it is essential to focus on the characteristics that specifically point to the deterioration of lead-based paint (LBP) through friction or abrasion. The correct response highlights the presence of lead-based paint, evidence of abrasion, and the accumulation of dust on nearby horizontal surfaces.

The reasoning behind this choice involves understanding how friction surfaces are formed and the indicators that suggest they may be hazardous. When LBP is subjected to abrasion, often from frequent contact or wear—such as on window sills, doors, or furniture—it can become dislodged and generate lead dust. This dust poses a significant health risk, particularly to children and pregnant individuals. The evidence of abrasion signals that the paint may be worn or compromised, which increases the likelihood of lead release into the environment. The dust accumulation on horizontal surfaces further indicates that lead particles may have been generated and settled nearby, confirming a potential hazard.

Other choices introduce variables that do not specifically align with identifying friction surface hazards, such as water damage, mold, or humidity, which can indicate different types of issues or hazards in a property but are not definitive indicators of friction surfaces alone. Therefore, the presence of LBP, signs of abrasion, and dust accumulation are crucial elements in assessing