21.   No hazardous substance was found in the mail.

22.   No hazardous substances had been found in the air except some dust with slightly elevated asbestos levels, the EPA said.

23.   The government will prepare the north apron for housing, with massive de-contamination also proposed to remove potentially hazardous substances.

24.   The Los Angeles-based company also signed a court order that prohibits trafficking in mislabeled hazardous substances.

25.   There have been reports Canadian peacekeepers serving in Croatia were exposed to hazardous substances such as PCBs and bauxite, a mineral used to make aluminum.

26.   Tight environmental standards have forced farmers to limit their use of environmentally hazardous substances.