61.   Officials of the Maryland Department of the Environment said regular air quality tests since Wednesday detected no hazardous chemicals in the smoke.

62.   Officials of the Maryland Department of the Environment said air quality tests since Wednesday detected no hazardous chemicals in the smoke.

63.   Officials said the company notified the USDA of the voluntary recall after tests detected the presence of listeria.

64.   Preliminary tests had detected the bacteria in a substance inside the letter.

65.   Recent EPA tests detected dangerous concentrations of asbestos in soil, air and dust at the vermiculite processing sites.

66.   Sophisticated laboratory tests can detect traces of accelerants from even burned materials.

67.   She said laboratory tests have detected a harmful algae in the water, but that samples were being sent to experts in South Africa for further testing.

68.   That test can also detect the disease early, but it misses some cancers, and the ones it finds are outnumbered by false alarms.

69.   The Federal Trade Commission, which regulates health product advertising, charged that Chembio and Alfa falsely claimed the tests accurately detected the HIV virus.

70.   The levels were lower than those FDA tests could detect.