TEM asbestos air sample results, NYC BOE, Nov 2001

NYC 9/11 Public Portal Document

TEM Asbestos (air) Count Sheet Client Name: NYC BOE Volume (liters): 1928 Lab Group #: 5886 Filter Type Filter Area: MCE 385 mm- Lab Sample #: 19 Grid Opening Size: 0.01124

Client Sample #: 19 Area Examined: 0,04496 mm- GRID BOX: Magnification! 20,000 GRID ID: Accelerating Voltage: 100 KeV # Grid Openings: 4 Analysis Date: 11/13/01

Analysis Performed By: MARK PEYSAKHOV

GO. Structure Structure T ype Length ID of Structure N or EDS No (Nonadb F B C M Chrys Amphibole Nonasb Ambig/ND No Coord <5iJ I Eiements) I

i

1

I I ! I i i I I

j___ I I j i I

J i Struct = > 0.5u .>5:1 Aspect Ratio Grid acceptance:

4= Positive diffraction pattern properties conforming to <50% undissolved filter, overlapped or folded Trrtals <10% particulate coverage >50% coverage ate laboratory identification criteria observed 4= EDS spectrum conforming to laboratory least 20 unfolded or overlapped grid squares <5% _______ P B i C I M I >5u holes or opaque areas identification criteria observec AMPHIBOLES Chrysotile I f I ! .Amphibole F = Single Fiber Amosite B = Bundle (<3 fibers <1 fiber diameier apart ' Crocidolite Ambiguous j C = Cluster (>3 Intersections) Anthophyllite Non-A^sbestos j i T remolite M = Matrix Actinolite j Non-identified i NSD = No Structures Detected

CITY_21MC1OO_OO31O6371

NYC-WTC_000185317