Patchy contamination definition: what percentage or less?

Patchy contamination definition: what percentage or less?

• A. 25% or less
• B. 15% or less
• C. 50% or less
• D. 75% or less

Answer: (A)

Patchy contamination means contamination is not evenly spread but occurs in isolated patches, covering only a relatively small portion of the area. The standard threshold used to define this pattern is 25% or less. If contamination exceeds that—50% or 75%, for example—it’s considered more extensive rather than patchy, which is why those options aren’t correct. While a figure like 15% would also be patchy by the idea, the defined cutoff used in this context is 25% or less, making 25% or less the best descriptor.

Patchy contamination means contamination is not evenly spread but occurs in isolated patches, covering only a relatively small portion of the area. The standard threshold used to define this pattern is 25% or less. If contamination exceeds that—50% or 75%, for example—it’s considered more extensive rather than patchy, which is why those options aren’t correct. While a figure like 15% would also be patchy by the idea, the defined cutoff used in this context is 25% or less, making 25% or less the best descriptor.