Asbestos Dust Sampling Results, 180 [name], Dec 2001

NYC 9/11 Public Portal Document

[ Andrew Goodman - £iummary of Asbestos Sampling Resultsi22801 .doc Page 30 (

Summary of Asbestos Sampling Results Page 2 of 2

Address: 180 Park Row Date sampled: Dec 4, 2001 5

Air samples

Airborne fibers as determined by Phased Contrast Microscopy (PCM): An air sample is collected by pulling air through a filter. The filter catches fibers and is then sent to a laboratory to detennine what types of fibers were in the air. Phase contrast microscopy identifies fibers based on size and shape, but not mineral composition. Therefore, the fibers seen by PCM include asbestos fibers as well as other fibers, such as textiles, fiberglass, cellulose, which might be present in your home. By counting all fibers, we are being more protective of your health when we compare this to our screening value for asbestos fibers.

Area Sampled Outside Common Residence 1 Residence 2 Sample Numbers No air sample No air sample A-Rl-29 VA-Rl-30 taken taken Concentration of Fibers in An­ No air sample No air sample <001 <001 at this location taken taken Concentration of Fibers in An­ <.001 <001 to .003 <001 to .003 <.001 to .003 at background locations Screening Value** 01 fee 01 f/ce 01 fee 01 fee

**Screening Value - The NYC standard for asbestos in community and residential buildings is 0.01 fibers/cubic centimeter (f/cc) in indoor air. This standard is used for re-occupancy in an indoor area where asbestos was detected and removed.

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