1.   The chemical leak poses a threat to human health.

2.   All along, however, the Energy Department has maintained that the tritium leak posed no serious health risk to neighbors of the lab.

3.   But mission operations specialist Bob Castle said officials determined that the leak posed little risk to the mission and said the flight rule would not be applied.

4.   No one was injured, and officials said the leak posed no threat to public safety.

5.   Quickly determining that the leak posed no danger, officials ordered the count to resume.

6.   Such leaks may pose a hazard to people nearby.

7.   The leaks pose no ecological threat because the thin layer of oil evaporates quickly.

8.   They showed that high-level radioactive waste leaks may pose a much greater threat to groundwater and the Columbia River than the Energy Department had acknowledged.

9.   He added that the plant was shut down even though the leak posed no danger to the environment.

10.   Mayor Francisco Ramirez Acuna said Tuesday the leak posed no risk of explosion.