The underground building had blast doors at the surface, as well as extensive air filters (mainly against biological, chemical and radioactive contaminants).

The EPA is also collecting and analyzing flood water samples for biological and chemical contaminants.

It includes physical, chemical, and biological processes to remove physical, chemical and biological contaminants.

Do not stock up on unnecessary solvents and clean the house regularly to prevent biological and chemical contaminants from building up.

Many volatile organic compounds, which are considered chemical contaminants, can cause acute effects on the occupants of a building.

Most of the lakes, rivers and seas were filthy with all kinds of industrial and chemical contaminants.

The command post was augmented after World War II with an air intake tower equipped with filters for nuclear, biological and chemical contaminants.

Brookhaven's 5,300 acres were designated a federal Superfund site in 1989 because of radioactive and chemical contaminants in soil and ground water.

Wherever you live, you have every right to inquire about your community water supply: Is it being tested for biological and chemical contaminants?

But because of the presence of chemicals, some fish in some waters contain chemical contaminants, and the cumulative effects of consumption are cause for concern.