TEM Asbestos air sample results, NYC BOE, Feb 2002

NYC 9/11 Public Portal Document

TEM Asbestos (air) Count Sheet Client Name: NAG BOE Volume (liters): 1841 Lab Group #: 6576 Filter Type / Filter Area: MCE 385 mm" Lab Sample #: 8 Grid Opening Size: 0.01124 Client Sample #: 11 Area Examined: 0 04496 mm-

GRID BOX: Magnification: 20,000 GRID ID: Accelerating Voltage: 100 KeV # Grid Oneninws: 4 Analysis Date: 2/6/02

Analysis Performed By: MARK PEYSAKHOV

GO. Structure Structure Type Length ID of Structure N or V EDS No >=05 p I >=5p (Nonadb F B ! C M Chrys Amphibole Nonasb Amoig/ND No Coord <5p i Elements)

j

Struct = > C.5u > 5:1 Aspect Ratio Grid acceptance:

y/- Positive diffraction pattern properties conforming to <50% undissolved filter, overlapped or folded T otals <10% particulate coverage >50% coverage ate laboratory identification criteria observed

EDS spectrum conforming to laboratory least 20 unfolded or overlapped grid squares <5% F B C i M >5p holes or opaque areas iderrtification criteria observed Chi'vsotile [ ”T~ AMPHIBOLES Amphibole I F = Single Fiber Amosite I B = Bundle (<3 fibers <1 ’iber diameter apart Crocidolite Ambiguous C = Cluster (>3 Intersections) Anthophyllite Non-Asbestos M = Matrix Tremolite Actinolite Non-Identified NSD = No Structures Detected

CITY_21MC100_003103007

NYC-WTC_000183711