TEM Asbestos air sample results, NYC BOE, Feb 2002

NYC 9/11 Public Portal Document

TEM Asbestos (air) Count Sheet Client Name: NYC BOE Volnme (liters): 1840 Lab Group #: 6832 Filter Type / Filter Area: MCE 385 mm- Lab Sample #: 10 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: 2/26/02

Analysis Performed By: j)' ROMAN PEYSAKHOV

GO Structure Structure Type Length ID of Structure N or 9 EDS No (Nonadb ' j No .Coord F B C M >=05 M >=5m Chrys Amphibole Nonasb Ambig/ND Elements) I <5p ----------- !

YS2 AC--------

-I

Struct = > 0.5p. > 5:1 Aspect Ratio Grid acceptance: Positive diffraction pattern properties conforming to '50% undissolved filter, overiapped orfolded Totals laboratory identification criteria observed ':1O% particulate coverage >50% coverage ate least 20 unfolded or overlapped grid squares <5% F B C M >5u ■/= EDS spectrum conforming to laboratory holes or opaque areas identification criteria observed Chrysotile AMPHIBOLES , Amphibole F = Single Fiber Amosite B = Bundle (<3 fibers <1 fiber diameter apart Crocidolite Ambiguous C = Cluster {>3 Intersections) Anthophylliter Non-Asbestos Tremolite M = Matrix Actinolite Non-Identified NSD = No Structures Detected

CITY_21MC100_003108295

NYC-WTC_000185677