NYC-WTC_000203541

NYC 9/11 Public Portal Document

TEM Asbestos (air) Count Sheet Client Name: NYC BOE V^olume filters): 1920 Lab Group #: 9089 Filter Type / Filter Area: MCE 385 Lab Sample #: 4 Grid Opening Size: 0.01124

Client Sample #: 04 Area Examined: 0 04496 mm^

GRID BOX: Magnification: 20.000 GRID ID: .Accelerating \'oltage: 100 KeV # Grid Openings: 4 Analysis Date: 11/11/02

Analysis Performed By: ROMAN PEYSAKHOV

; GO. Structure Structure Type Length ID of Structure N or EDS (Nonadb ‘ i No F B C M >=05 M >=5p Chrys Amphibole Nonasb Ambig/ND ’ No ' Coord <5m Elements)

z K

i ’ !

i T

Photo No (from 1 in 5 asbestos containing samples) Grid acceptance' Struct = > 0 5p > 5'I Aspect Ratio <50% undissolved filter, overlapped or folded Totals Positive diffraction pattern properties conforming to <10% particulate coverage >50% coverage ate laboratory identification critena observed least 20 unfolded or overlapped gnd squares <5% F B C M >5iJ holes or opaque areas \= EDS spectrum conforming to laboratory Chrysotile identification entena observed ! AMPHIBOLES! Amphibole F = Single Fiber Amosite B = Bundle (<3 fibers <1 fiber diameter apart Crocidolite Ambiguous C = Cluster (>3 Intersections) ! Anthophyllite Non-Asbestos Tremolite M = Matrix Non-ldentified Actinolite NSD = No Structures Detected

CITY_21MC100_0 03058536

NYC-WTC_000203541