TEM Asbestos air sample results, NYC BOE, Apr 2002

NYC 9/11 Public Portal Document

TEM Asbestos (air) Count Sheet Client Name: OTC BOE Volume (liters): 1805 Lab Group #: 7574 Filter Type / Filter Area: MCE 385 mm’ Lab Sample #: 15 Grid Opening Size: 0.01124 Client Sample #: Area Examined: 0.04496 mm- GRID BOX: Magnification: 20,000 GRID ID: Accelerating Voltage: 100 KeV # Grid Openings: 4 Analysis Date: 4/29/02

Analysis Performed By: ROMAN PEYSAKHOV

GO. Structure Structure Type Length 10 of Structure N or V EDS (Nonadb No F B C M >=05 p : =5|J Chrys Amphibole Nonasb Ambig/NO No <5m Elements) I ZTt T - 2

/ig If

Struct = > 0.5p >5:1 Aspect Ratio Grid acceptance:

3- Positive diffraction pattern properties conforming to <50% undissolved filter, overlapped or folded Totals <10% particulate coverage >50% coverage ate laboratory identification criteria observed least 20 unfolded or overlapped grid squares <5% F B C >5|j v'= EDS spectrum conforming to laboratory holes or opaque areas identification criteria observed Chrysotile A.MPHISOLES Amphibole F = Single Fiber Amosite 3 = Bundle <3 fibers <1 fiber diameter apart Crocidolite Ambiguous I Anthophyllite Non-Asbestos C = Duster l>3 Intersections! Tremolite M = Matrix Actinolite Non-Identified NSC = No Structures Detected L

CONFIDENTIAL, CITY_21MC100_003471369 SUBJECT TO PROTECTIVE ORDER NO. 2, SEPT. 2008

NYC-WTC_000177134