Which statement correctly describes a limitation of composite sampling?

Which statement correctly describes a limitation of composite sampling?

• A. It preserves data on the exact surface that contributed to the sample
• B. It provides precise location data for all surfaces
• C. It loses information on which exact location contributed the data
• D. It eliminates the need for any further cleaning

Answer: (C)

Composite sampling combines material from several locations into one analysis. This approach can be efficient, reducing the number of analyses and costs, but it sacrifices the ability to know exactly which surface contributed what amount. Because multiple areas are merged, the lab result reflects the overall level across all contributing locations, not the value for any single surface. That means you can’t pinpoint hotspots or target specific surfaces for remediation based on a composite result alone. The other statements don’t fit because they imply you can identify precise origins or rely on composite sampling to provide exact location data, which isn’t possible when samples are combined. And cleaning decisions aren’t made by the sampling method itself; regardless of sampling, surfaces still need appropriate cleaning and mitigation based on the findings.

Composite sampling combines material from several locations into one analysis. This approach can be efficient, reducing the number of analyses and costs, but it sacrifices the ability to know exactly which surface contributed what amount.

Because multiple areas are merged, the lab result reflects the overall level across all contributing locations, not the value for any single surface. That means you can’t pinpoint hotspots or target specific surfaces for remediation based on a composite result alone.

The other statements don’t fit because they imply you can identify precise origins or rely on composite sampling to provide exact location data, which isn’t possible when samples are combined. And cleaning decisions aren’t made by the sampling method itself; regardless of sampling, surfaces still need appropriate cleaning and mitigation based on the findings.