TEM Asbestos air sample results, NYC BOE, Mar 2002

NYC 9/11 Public Portal Document

TEM Asbestos (air) Count Sheet Client Name: NYC BOE Volume (liters): 1840 Lab Group #: 7034 Filter Type / Filter Area: MCE 385 mm" Lab Sample #: 12 Grid Opening Size: 0.01124

Client Sample #: 15 Area Examined: 0.04496 mm^

GRID BOX: 9^/ Magnification: 20,000 GRID ID: Accelerating Voltage: 100 KeV # Grid Openings: 4 Analysis Date: 3/12/02

Analysis Performed By: ROMAN PEYSAKHOV

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

A _________

Struct = > O.bg > 5:1 .Aspect Ratio Grid acceptance: V= Positive diffraction pattern properties conforming to "^0% undissolved filter, overtapped or folded Totals laboratory identification criteria observed <10% particulate coverage >50% coverage ate least 20 unfolded or overlapped grid squares <5% F B I C M >5p v'= EDS spectrum conforming to labora’op/ holes or opaque areas identification criteria observed Chrysotile AMPHIBOLES Amphibole F = Single Fiber Amosite B = Bundle (<3 fibers <1 fiber diameter apart Crocidolite Ambiguous ; C = Cluster (>3 Intersections) Anthophyllite I Non-Asbestos i Tremolite M = Matrix ; Non-Identified ■ Actinolite NSD = No Structures Detected ___

CITY_21MC1OO_OO31O2458

NYC-WTC_000183320