TEM Asbestos air sample results, NYC BOE, Dec 2001

NYC 9/11 Public Portal Document

TEM Asbestos (air) Count Sheet Client Name: NTT BOE Volume filters): 1944 Lab Group #: 6010 Filter Type / Filter Area: MCE 385 mrn= Lab Sample #: 18 Grid Opening Size: 0.01124

Client Sample #: 18 Area Examined: 0.04496 mm*

GRID BOX: Magnification: 20.000 GRID ID: Accelerating A oltage: 100 KeV # Grid Openings: 4 Anah'sis Date: 12/1/01

Analysis Performed By: MARK PEYSAKHOV

GO S Structure Structure Type Length ID of Structure N or EDS (Nonadb No F B C M >=05 p >=5)j Chrys Amphibole Nonasb Ambig/ND No Coord <5u Elements)

a

Struct = > 0.5p > .5:1 Aspect Ratto i Grid acceptance:

Positive diffraction pattern properties conforming to <50% undissoived filter, overlapped or folded Totals laboratory' identification criteria observed <10% particulate coverage >50% coverage ate least 20 unfolded or overlapped grid squares <5% C M >5u x= EDS spectrum conforming to laboratory holes or opaque areas _________ i F i B ioentification criteria observed Chrysotile | ■AMPHIBOLES Amphibole r = Single -iber Amosite E = Bundle (<3 fibers <’ fiber diameter apart Crocidolite Ambiguous C = Cluster (>3 Intersections! Anthophyllite Non-Asbestos i T remolite Il = Matrix Actinolite N on-Identified J i NSD = No Structures Detected ..__ l._.

CITY_21MC100_003104436

NYC-WTC_000183979