TEM Asbestos air sample results, NYC BOE, Nov 2001

NYC 9/11 Public Portal Document

TeM Asbestos (air) Count Sheet Client Name: WC BOE Volume (liters): 1952 Lab Group #: 5891 Filter Type / Filter Area: MCE 385 mm- Lab Sample #: Grid Opening Size: 0.01124 Client Sample #: 21 Area Examined: 0.04496 mm-

GRID BOX: Magnification: 20,000 GRIDED: Accelerating Voltage: 100 KeV # Grid Openings: 4 Analysis Date: ll,/15/01

Analysis Performed By: ROMAN PEYSAKHOV

GO. Structure Structure Type Length ID of Structure N or 4 EDS i No (Nonadb F B C M >=05 p >=5|J Chrys Amphibole NonasD Ampig/ND No Coord <5p Elements) :

TUTl I I I i //

^(9

I__ I i[ ___ ( i r

i j

I

! Struct = > 0.5p _> 5:1 Aspect Ratio Grid acceptance: 9= Posftive diffraction pattern properties conforming to ^50% undissolved filter, ovedapped orfolded Totals laboratory identification criteria observed :10% particuiate coverage >50% coverage ate least 20 unfolded or overlapped grid squares <5% F B I C M >5u EDS spectrum coniorming to laboratory holes or opaque areas ioentification 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-Ideniified Actinolite NSD = No Structures Detected

CITY_21MC100_003106434

NYC-WTC_000185356