TEM Asbestos air sample results, NYC BOE, Apr 2002

NYC 9/11 Public Portal Document

TEM Asbestos (air) Count Sheet Client Name: NYC BOE Volume (liters): 1840 Lab Group #: 7483 Filter Type / Filter Area: MCE 385 mm- Lab Sample #: 10 Grid Opening Size: 0.01124 Client Sample #: 10 Area Examined: 0.04496 mm’ GRID BOX: Magnification: 20,000 GRID ID: Accelerating Voltage: 100 KeV # Grid Openings: 4 Analysis Date: 4/20/02

Analysis Performed By: ROMAN PEYSAKHOV

GO. Structure I Structure Type Length ID of Structure N or \ EDS No >=05 p A ATiUA— (Nonadb F B C M >=5|j Chrys Amphibole Nonasb Ambig/ND /X No Xoord <5p ' Elements)

wn 0 5 II (I ■

Struct = > O.Sp >5:1 Aspect Ratio Gnd acceptance:

\ = Positive diffraction pattern properties conforming to <50% undissolved filter, overlapped or folded Totals laboratory identification criteria observeo <10% particulale coverage >50% coverage ate least 20 unfolded or overlapped grid squares <5% F ' B I C i M ; >5p v= EDS spectrum conforming to laboratory holes or opaque areas identification criteria observed Chrysotile AMPHIBOLES Amphibole = Single Fiber Amosite B = Bundle (<3 fibers <1 fiber diameter apart Crocidolite Ambiguous C = Cluster (>3 Intersections) Anthophyllite Non-Asbestos Tremolite M = Matrix Non-Identified Actinolite NSD = No Structures Detected

CONFIDENTIAL, CITY_21MC100_003471200 SUBJECT TO PROTECTIVE ORDER NO. 2, SEPT. 2008

NYC-WTC_000177018