TEM Asbestos Air Sample Results, NYC BOE, May 2002

NYC 9/11 Public Portal Document

TEM Asbestos (air) Count Sheet Client Name: NYC BOE Volume rtitersi; 1944 Lab Group #: 7902 Filter Type / Filter Area: MCE 385 mm^ Lab Sample #: 16 Grid Opening Size: 0.01124 Client Sample #: Area Examined: 0.04496 mrn-

GRID BOX: Magnification: 20 000 GRID ID: Accelerating Voltage: 100 KeV # Grid Openings: 4 Analysis Date: 5/30/02

Analysis Performed By: l\A ROMAN PEYSAKHOV

GO. Structure Structure Type Length ID of Stiucture N or v EDS (Nonadb No F B C M >=05 M Chrys Amphibote Nonasb Ambig/ND No Coord <5m Elements)

r 1=

Struct = > 0.5)1 >5:1 Aspect Ratio Grid acceptance: >/= Positive diffraction pattern properties conforming to <50% undissolved filter, overlapped or folded Totals laboratory identification criteria observed <10% particulate coverage >50% coverage ate least 20 unfolded or overlapped grid squares <5% F B C M >5p '1= 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) Anthophyllite Non-Asbestos Tremolite M = Matrix Non-Identified Actinolite NSD = No Structures Delected

CITY_21MC100_003090820

NYC-WTC_000191503