The decision surprised many in the city because the property where Pfizer built was an abandoned industrial site with extensive contamination.

The study found that there was still extensive contamination, after approximately fifteen years during which attempts were made to clean up the town.

Where extensive contamination exists, even new construction is impossible without a thorough cleanup, often requiring state or Federal assistance.

If the sampling shows extensive contamination far from ground zero, the testing area may have to be expanded, Mr. Oppelt said.

Due to extensive contamination by unexploded ordnance, the island is currently off-limits to the public.

Further surveys of the site uncovered extensive contamination with chemical wastes which had been dumped "in both bulk and containerized forms."

This was eventually cleaned up, but due to extensive contamination it was decided that the 41 story ruin was to be taken down.

It found extensive contamination in the community.

In several incidents, weapons also exploded in non-nuclear blasts that caused extensive radioactive contamination.

In April 2008, the Freewinds was sealed, and work stopped on refurbishments, due to "extensive contamination" with blue asbestos.