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Laboratory Chain of Custody

Polarized Light Microscopy

Phase Contrast Microscopy

Point Count Analysis

Laboratory Accreditations

Pinnacle Consultants, LLC provides PLM (Polarized Light Microscopy), PCM (Phase Contrast Microscopy), Point count analysis and Fungal Spore Analysis.  All of our analysts are certified and have extensive experience in the analysis of bulk asbestos samples, airborne fibers analysis along with the analysis of spore traps and direct examination for fungal spores.

Polarized light microscopy (PLM)  utilizes a stereoscope and PLM microscope to determine the presence or absence of asbestos in bulk building material samples. The presence of the six different types of asbestos can be determined using this method. The six types are chrysotile, amosite, crocidolite, tremolite, actinolite, and anthophyllite. Each type has its own unique characteristics.


Phase contrast microscopy (PCM) is the analysis of filter samples from air cassettes. A section of the filter is cut from the air cassette and placed on a slide for analysis under the PCM microscope. Fibers are counted on the fields and the concentration of fibers is determined from the count totals. This method counts all fibers present that meet the criteria for counting, regardless of fiber type.


Point count analysis determines, with more accuracy, the percentage of asbestos in a bulk sample. To qualify for point counting, a sample must be able to be ground to a dust (i.e. plaster, joint compound, or non-silicone window caulking). The sample is pulverized and mounted on a series of slides. 

© 2020 by Pinnacle Consultants, LLC          Cover Photo by Dan Friend


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