The pact appeared to be one of the largest ever made by a private company in a case involving toxic substances.

Many veterans participated in performance or equipment tests that did not involve biological or chemical substances.

Most of the objects involved substances that can be used in the manufacture of explosives.

While many kinds of work involve hazardous substances, some types of business are more likely to pose a risk than others.

You must provide the Home Office with a summary of your transactions involving scheduled substances every six months.

There are specific rules on recording incidents involving hazardous substances.

Sets out measures to control major accident hazards involving dangerous substances.

There are two directives and an information system used in the event of accidents involving radioactive substances.

Yet another activity is the development of a response capability for accidents involving noxious and dangerous substances.

The activities outlined above are just some of those that involve hazardous substances.