Phase Contrast Microscopy (PCM) is a well-established analytical protocol used for the quantification of fibrous materials in air samples. PCM analysis is routinely used in conjunction with personal and environmental air monitoring. All of our analysts are graduates of NIOSH 582 courses, or certified equivalents, and routinely re-qualify for analytical duties through participation in the AIHA "PAT rounds". Allegheny Asbestos Analysis, Inc. has established a reputation in the asbestos abatement industry for timely, accurate, and reliable Phase Contrast Microscopy.