Environmental Protection Agency (EPA) Model Lead Based Paint Risk Assessor Practice Test

What type of tube is suitable for dust wipe sampling?

1. Glass tubes with a sealable lid

2. Non-sterilized plastic tubes with a sealable lid

3. Sterilized metal tubes

4. Simple paper envelopes

The correct answer is: Non-sterilized plastic tubes with a sealable lid

For dust wipe sampling, the use of non-sterilized plastic tubes with a sealable lid is appropriate as they provide a controlled environment for collecting and storing the dust samples without introducing contaminants. These tubes protect the integrity of the samples, ensuring that they can be analyzed accurately for lead content. Non-sterilized plastic tubes are designed to be lightweight and moisture-resistant, which makes them suitable for fieldwork where conditions may not be optimal for delicate equipment. Their sealable lids prevent contamination from the external environment, which is crucial when handling potentially hazardous materials. Other options, such as glass tubes, while they may be suitable for certain types of samples, pose a higher risk of breakage during transportation and may not be necessary for dust sampling. Sterilized metal tubes could introduce unwanted variables into the sample, and simple paper envelopes do not provide the necessary protection and integrity needed for accurate analysis, as they can allow dust to escape or become contaminated. Thus, non-sterilized plastic tubes with sealable lids are the best choice for effective dust wipe sampling.