TEM Asbestos air sample results, NYC BOE, Feb 2002

NYC 9/11 Public Portal Document

TEM Asbestos (air) Count Sheet Client Name: NYC BOE Volume (liters): 1816 Lab Group #: 6843 Filter Type / Filter Area: MCE 385 mm- Lab Sample #: 15 Grid Opening Size: 0,01124 Client Sample #: 18 Area Examined: 0.04496 mm-

GRID BOX: Magnification: 20,000 GRID ID: Accelerating Voltage: 100 KeV # Grid Openings: 4 Analysis Date: 2/27/02

Analysis Performed By: MARK PEYSAKHOV

GO. Structure Structure Type Length ID of Structure N or 0 EDS (Nonadb ’ '■ No F B C M >=05 u >=5p Chrys Amphibole NonasD Ambig/ND No Coord <5iJ Elements)

S- A i — .3 X

i I 1 I

„ i Struct = > 0.5n > 5:1 Aspect Ratio Grid acceptance:

•3= 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 1 >5p 'J- EDS spectrum conforming to laboratory identification criteria observed holes or opaque areas

AMPHIBOLES 1 Chrysotile Amphibole ~T~i F = Single Fiber Amosite L B = Bundle {<3 libers <1 fiber diameter apart Crocidolite Ambiguous i C = Cluster (>3 Intersections) Anthophyllite j . Non-Asbestos j Tremolite M = Matrix ! Non-Identiiied ' Actinolite NSD = No Structures Detected I

CITY_21MC100_0 03103535

NYC-WTC_000183924