TEM Asbestos air sample results, NYC BOE, Oct 2001

NYC 9/11 Public Portal Document

TEM Asbestos (air) Count Sheet Client Name: NY’C BOE Volume (titers): 1936 Lab Group #: 5820 Filter Type / Filter Area: MCE 385 mnV Lab Sample #: 6 Grid Opening Size: 0.01124 Client Sample #: 6 Area Examined: 0.04496 mm- GRID BOX: Magnification: 20,000 GRID ID: Accelerating Voltage: 100 KeV # Grid Openings: 4

Analysis Performed By: MARK PEYSAKHOV

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

i i I i ) i

r~i

H

Struct = > 0.5n > 5:1 Aspect Ratio Gnd 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 C M >51J EDS spectrum conforming to laboratory holes or opaque areas identification criteria observed ChrysoTile AMPHIBOLES Amphibole i F = Single Fiber Amosite B = Bundle (<3 fibers <1 fiber diameter apart Crocidolite Ambiguous I C = Cluster (>3 Intersections) Anthophyllite Non-Asbestos i Tremolite M = Matrix Non-Identified I Actinolite NSD = No Structures Detected

CITY_21MC100_003106090

NYC-WTC_000185126