How many subsamples are recommended to collect from bare soil in play areas?

The recommended number of subsamples to collect from bare soil in play areas is 3 to 10 subsamples. This range is suggested to ensure a comprehensive assessment of potential lead contamination, as various factors such as soil composition, age of the area, and previous use can contribute to uneven distribution of lead. By collecting multiple subsamples, a more reliable average concentration of lead in the soil can be determined, which is critical for evaluating health risks to children who play in these areas. This sampling strategy helps ensure that any potential contamination is accurately identified and effectively addressed, maintaining safety in environments where children frequently play.