Lead by weight in dry surface paint equals which of the following values?

Lead by weight in dry surface paint equals which of the following values?

• A. 1%
• B. 0.4%
• C. 0.05%
• D. 0.5%

Answer: (D)

The main idea here is the regulation-defined threshold for what counts as lead-based paint based on how much lead is in the dried paint film. Lead-based paint is defined as paint that contains 0.5 percent lead by weight in the dry film (equal to 0.5 g of lead per 100 g of paint, or about 5,000 parts per million). If the film’s lead content is at or above this level, it triggers requirements for lead-based paint handling, testing, and hazard reduction; if it’s below, the paint isn’t considered lead-based under that standard, though hazards can still exist from dust or chips. Why this value fits: 0.5% by weight is the regulatory cutoff chosen to identify paints with a significant lead content while keeping testing practical. The other numbers are either higher or lower than this defined threshold, so they don’t represent the official standard for labeling paint as lead-based.

The main idea here is the regulation-defined threshold for what counts as lead-based paint based on how much lead is in the dried paint film. Lead-based paint is defined as paint that contains 0.5 percent lead by weight in the dry film (equal to 0.5 g of lead per 100 g of paint, or about 5,000 parts per million). If the film’s lead content is at or above this level, it triggers requirements for lead-based paint handling, testing, and hazard reduction; if it’s below, the paint isn’t considered lead-based under that standard, though hazards can still exist from dust or chips.

Why this value fits: 0.5% by weight is the regulatory cutoff chosen to identify paints with a significant lead content while keeping testing practical. The other numbers are either higher or lower than this defined threshold, so they don’t represent the official standard for labeling paint as lead-based.