TEM Asbestos air sample results, NYC BOE, Feb 2002

NYC 9/11 Public Portal Document

TEM Asbestos (air) Count Sheet Client Yame: YY'C BOE Volume (liters'): ISOS Lab Group #: 6674 Filter Type / Filter Area: MCE 3S5 mm Lab Sample 16 Grid Opening Size: 0.01124 Client Sample #: 16 ■Area E^vamined: 0.04496 mm- GRID BOX: Magnification: 20,000 GRID ID: ■Accelerating Voltage: 100 KeV # Grid Openings: 4 ■Analysis Date: 2/14/02

Analysis Performed By: MARK -PEYSAKHOV

GO. Structure Structure Type Length ID of Structure N or N EDS No 7^0511 (Nonadb F B C M ■=5p Chrys Amphibole Nonasb Ambig/ND No Coord <Sp Elements)

A .. 4^ 3

Struct = > 0.5)1 .> 5:1 Aspect Ratio Grid acceptance; ^L Positive diffraction pattern progenies conforming to <50% undissolved filler, overlapped or folded Totals laboratory identification criteria observed <10% partculate coverage >50% coverage ate

v'= EDS spectrum conforming to iaccratorr least 20 unfolded or avertapped gn'd squares <5% holes or opacue areas I F I B I C IMi ioentification critena observed Chrysotile i AMPHIBOLES ; Amphibole i .p = Single Fiber Amesite B = Bundle ;<3 fibers <1 fiber oiameter acar Crocidolite ’ Ambiguous C = Cluster (>3 Interseoiions) Anthopnyllite 1 Non-Asbestos ; Tremolite M = Matrix I Non-Idenrified Actinolite NSD = No Structures Detected

CITY_21MC1OO_OO31O32O5

NYC-WTC_000183775