Which of the following best describes a composite sample?

• A. A single sample made up of multiple sub samples
• B. A sample collected from multiple floors
• C. An average of several samples
• D. A single sample taken from the exterior

Answer: (A)

Composite sampling means taking several small sub-samples from different spots and mixing them into one container to form a single sample that is analyzed as a whole. In lead inspection, this provides a single value that represents the level across the combined areas rather than a result from a single location, helping to capture variability and give a more representative picture. It’s not about collecting from multiple floors, nor just averaging separate results, nor taking a single sample from the exterior—those would be either separate samples or non-combined representations.