What is the maximum number of dwellings out of the sampled population that may exceed clearance levels?

What is the maximum number of dwellings out of the sampled population that may exceed clearance levels?

• A. 1 percent or 5 dwellings
• B. 5 percent or 50 dwellings
• C. 10 percent or 100 dwellings
• D. 20 percent or 100 dwellings

Answer: (B)

The concept being tested is how clearance results are evaluated across a group of dwellings using an acceptance-sampling approach. After abatement or renovation, a limited number of dwellings in the sampled population may exceed clearance levels, but there are strict caps to keep overall exposure under control. The standard sets two limits: no more than 5 percent of the dwellings tested may exceed the clearance levels, and no more than 50 dwellings may exceed them in total. In practice you apply both constraints together—the actual allowable number is the lesser of these two numbers for a given sample size. That’s why the correct choice states 5 percent or 50 dwellings. For example, with 100 dwellings tested, up to 5 may exceed clearance; with 1,000 dwellings, up to 50 may exceed clearance. The other options don’t match these regulatory limits.

The concept being tested is how clearance results are evaluated across a group of dwellings using an acceptance-sampling approach. After abatement or renovation, a limited number of dwellings in the sampled population may exceed clearance levels, but there are strict caps to keep overall exposure under control. The standard sets two limits: no more than 5 percent of the dwellings tested may exceed the clearance levels, and no more than 50 dwellings may exceed them in total. In practice you apply both constraints together—the actual allowable number is the lesser of these two numbers for a given sample size. That’s why the correct choice states 5 percent or 50 dwellings. For example, with 100 dwellings tested, up to 5 may exceed clearance; with 1,000 dwellings, up to 50 may exceed clearance. The other options don’t match these regulatory limits.