1.   Critics accuse the company of acting too slowly in notifying residents of the chemical leak.

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

3.   The school was closed as a precautionary measure following a chemical leak.

4.   Safety procedures are being urgently reviewed after a chemical leak at a major manufacturing plant.

5.   Although some people were exposed to the chemical leak, Texas City Mayor Chuck Doyle gave both Sterling workers and city employees high marks for the Wednesday response.

6.   At first glance, this seems an unlikely place to be troubled by chemical leaks, school evacuations and denunciations of one of its oldest employers.

7.   But all the while the company maintaining that whatever the people were treated for was unrelated to the chemical leak.

8.   Several workers said alarms intended to detect chemical leaks were often ignored.

9.   The chemical leak from the cooling system caused significant sinus and respiratory irritation for Mir crew members.

10.   Biologists from the University of the West Indies and the Port Royal Marine Laboratory were exploring other possible causes, including a chemical leak.