1.   If either chemical had leaked into the ground, the groundwater and soil could be contaminated for years, officials said.

2.   The workers going into the basement will have monitors that constantly check the air to ensure that the chemical is not leaking.

3.   A third possibility is that the chemicals leaked into soil, groundwater and underground infrastructure, according to the Environmental Protection Agency and Con Ed.

4.   Last year, the Mir suffered a fire, chemical leaks in its cooling system and a rupture from a collision with a cargo ship.

5.   Lund said he was waiting for gas samples to be tested to confirm which chemicals had leaked from the plant.

6.   No chemicals leaked from the overturned cars.