TEM Asbestos air sample results, NYC BOF, Mar 2002

NYC 9/11 Public Portal Document

TEM Asbestos (air) Count Sheet Client Name: NYC BOF Volume (liters): 1808 Lab Group #: 6908 Filter Type / Filter Area: MCE 385

Lab Sample #: 16 Grid Opening Size: 0.01124

Client Sample #: 19 Area Examined: 0.04496 mm-

Magnification: GRID BOX: 20.000 GRID ID: Accelerating Voltage: 100 KeV # Grid Openings: 4 Analysis Date: 3/3/02

Analysis Performed By: MARK PEYSAKHOV

GO. Structure Structure Type Length ID of Structure Nor EDS (Nonadb No C M >=05 u I =5p Chrys Amphibole Nonasb Ambig/ND No Coord Elements) <5m

J------- F.. ----------- F

n

i------- h I

Struct = > 0.5h > 5:1 Aspect Ratio Grid acceptance,

T= 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 F B C M >5p 1= EDS spectrum conforming to laboratory holes or opaque areas identification criteria observed Chrysotile AMPHIBOLES Amphibole i F = Single Fiber Amosite 8 = Bundle (<3 fibers <1 fiber diameter apart Crocidolite Ambiguous I C = Cluster (>3 Intersections! Anthophyllite Non-Asbestos i Tremolite M = Matrix Non-Identified Actinolite NSD = No Structures Delectec

CITY_21MC100_0 03102259

NYC-WTC_000183209