1.   But late last year, just as he began to make progress toward using the isotope against cancer, a radiation leak was discovered in a laboratory storage tank.

2.   Coastal Aruba Refining Co. NV shut its main crude unit after discovering a leak in furnace tubes during routine maintenance, a spokesman said.

3.   Critics of Olympic say one question that must be answered is why it took the company so long to discover the leak.

4.   If no leaks are discovered, he said, the tank can usually be filled with sand and then covered over with soil.

5.   It had hoped to return the refinery to full production this summer, but on Friday workers discovered a leak in a steam generator.

6.   State and federal officials say the deadline caused tank owners to discover leaks when they dug up old tanks or installed new detection systems.

7.   The airlock leak was discovered at the conclusion of a spacewalk in early November.

8.   The future of the reactor, which was closed last December when the leak was discovered, remains in doubt.

9.   They discovered the leak earlier this year and later evacuated an office building next to the reactor.

10.   When Exxon Pipeline discovered a leak in a liquid petroleum gas line, remote control valves were shut, and crews worked through the night to release trapped liquids.