Underground development started in 1974 through a sampling programme.

This site contains a more thorough description of RadNet, its sampling programs, history, and other related information.

So she began a sampling program that, by conservative accounts, cost more than $100,000 per year.

Ms. Rosen said the sampling programs were a good idea.

The sampling programs are still in their infancy.

EPA turned off the system later in 1998, because the sampling program did not measure potential dioxin emissions.

And because the sampling program is voluntary, concerns were raised that the potential liability could keep building owners from participating.

In the 1970s, the lab's worldwide sampling programs were expanded to include non-nuclear pollutants.

Following the first study changes were made to the trucks to contain dust and a sampling program was put into effect to monitor dust release.

A sampling program showed declines at all sampling sites.