11.   One complaint alleged that phone service providers and makers know the products generate unsafe levels of microwave radiation and that they had sought to suppress evidence of that danger.

12.   Tests determined that several of them had unsafe asbestos levels, and they were decontaminated, the officials said.

13.   The lawsuits contend the supermarket chains have failed to warn people living around distribution centers and workers of unsafe levels of cancer-causing diesel exhaust.

14.   The state law says businesses must warn if they expose people to cancer-causing chemicals at unsafe levels.

15.   Though unsafe levels of arsenic were generally limited to an area ranging from the Bay Area to Lake Tahoe, high levels also existed in Los Angeles tap water.

16.   Don Ferguson, a spokesman for the federal department, said if any more unsafe levels of chemicals are found, relocation of families would be considered.

17.   Ecologists say several areas still contain radiation levels unsafe for humans.

18.   Preliminary tests have shown that it contains unsafe levels of the poisonous metal mercury.

19.   The British government said personnel involved in the tests gave informed consent and denied they were exposed to unsafe levels of radiation.

20.   The British government says all personnel involved in the tests gave informed consent, and denies they were exposed to unsafe levels of radiation.