TEM Asbestos air sample results, NAT BOE, Mar 2002

NYC 9/11 Public Portal Document

TEM Asbestos (air) Count Sheet Client Name: NAT BOE Volume (liters): 1824 Lab Group #: 7151 lAlter Type / Filter Area: MCE 385 mm- Lab Sample #: 16 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: 3/20,/02

Analysis Performed By: fC/ ROMAN PEYSAKHOV

GO, Structure Structure Type Length ID of Structure Norv EDS (Nonadb No F B C M >=05 M >=5p Chrys Amphibole Nonasb Ambig/ND No Coord Elements) <5p

57^13 IL 4’ is —

I 1------- r

Struct = > 0.5p _> 5:1 Aspect Ratto Grid acceptance;

'j'= 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 I B C M >5u 9= EDS spectrum conforming to iaboratory holes or opaque areas identification critena observed Chrysotile AMPHIBOLES Amphibole F = Single Fiber Amosite B = Bundle (<3 fibers <1 fiber diameter apart Crocidolite Ambiguous C = Cluster (>3 Intersections) Anthophyllite Non-Asbestos i Tremolite M = Matrix Non-Identified ! NSD = No Structures Detected Actinolite _____ ..... ..1 1 1

CITY_21MC100_0 03102692

NYC-WTC_000183487