NYC-WTC_000203519

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 mm- Lab Sample #: 4 Grid Opening Size: 0.01124 Client Sample #: 04 Area Examined: 0.04496

GRID BOX: GRIDED: /Wt Magnification: ■Accelerating Voltage: 20.000 100 KeV # Grid Openings: 4 Analysis Date: 11/11/02

Analysis Performed By: ROMAN PEYSAKHOV

I GO Structure Structure Type Length ID of Stnicture N or 7 EDS ‘ i No (Nonadb F B C M >=05 p >=5|j Chrys Amphibole Nonasb Ambig/ND ' No ' Coord <5p Elements)

37 As, 1 eiH I I K (L

Photo No (from 1 in 5 asbestos containing samples) „ Grid acceptance Struct = > 0.5u .> 51 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 >5p holes or opaque areas V= EDS spectrum conforming to laboratory Chrysotile identification cnteria observed i AMPHIBOLES i Amphibole F = Single Fiber i Amosite ' B = Bundle (<3 fibers <1 fiber diameter apart i Crocidolite Ambiguous C = Cluster (>3 Intersections) I Anthophyllite Non-Asbestos Tremolite M = Matrix Non-Identified Actinolite NSD = No Structures Detected

CITY_21MC100_003058444

NYC-WTC_000203519