NYC-WTC_000217819

NYC 9/11 Public Portal Document

TEM Asbestos (air) Count Sheet Client xName: NYC BOE Volume (Titers): 19S4 Lab Group #: 6573 Filter Type / Filter At ea: MCE 3S5 m Lab Sample #: 4 Grid Opening Size: 0.01124

Client Sample #: 4 Area Examined: 0 04496 m;n’

GRID BOX: Magnification: 20.000 GRIDID; Accelerating Voltage: 100 KeV # Grid Openings: 4 ■Analysis Date: 2^6,'O2

Analysis Performed By: MARK PEYSAKHOV

GO, Structure Structure Type Length ID of Structure N or \ EDS No >=05 p :>=5u Amphiboie : Nonasb I Ambig/ND i 4<ona.>b F B C M Chrys I I tiemenis) No Coord <5p /

Struct = >0.5p >5:1 Aspect Ratio Grid acceptance: >/= Positive diffraction pattern properties conforming to <50% undissolved filter, overlapped or folded Totals <10% particulate coverage >50% coverage ate laboratory identification criteria observed least 20 unfolded or overlapped grid squares <5% [ F B I C ! M : EDS spectrum conforming to laboratory holes or opaque areas identification cnteria observed Chrysotile

F = Single Fiber AMPHIBOLES Amosite Amphibole i f! Ambiguous j B = Bundle (<3 fibers <1 fiber diameter apart Crocidolite C = Cluster (>3 Intersections) Anthophyllite Non-Asbestos j T remolite M = Matrix Actinolite Non-Identified i NSD = No Structures Detected

CITY_21MC100_000465766 NYC-WTC_000217819