31.   The size of the asbestos fibers that the government was measuring also became part of the battle.

32.   The tests were done during rainy weather, which may have reduced the amount of asbestos fibers in the air.

33.   Today, commercial labs use three different levels of microscopic examination to detect and quantify asbestos fibers.

34.   Tremolite asbestos fibers were found in four of the samples.

35.   Twenty-three of the air samples showed actinolite or tremolite asbestos fibers, the on-scene coordinator said.

36.   Under the federal Clean Air Act, asbestos must be removed from demolition and renovation sites without releasing asbestos fibers into the environment.

37.   Unlike cracked walls or collapsed fireplaces, asbestos fibers are invisible to the eye and test results are open to wide interpretation.

38.   Water that gets caught behind the vinyl or aluminum will take forever to dry out, and power-washing can release asbestos fibers from asbestos cement.

39.   As a young man, Vento worked as a state-paid laborer in several St. Paul-area facilities that he claimed exposed him to asbestos fibers.

40.   Asbestosis is a progressive lung disease caused by inhaling asbestos fibers.