Using microscope to test for asbestos fibers

From: test (no_at_email.com)
Date: 07/18/04 

Date: Sun, 18 Jul 2004 19:53:25 +0300

What kind of microscope I should use to test for asbestos fibers? Would a 100x or
1000x light microscope suffice? I'd like to test samples on site and take only
suspect specimens to University lab. The site has a very low probability for
fibers but owner wants to check anyway.