NYC-WTC_000228954

NYC 9/11 Public Portal Document

TEM Asbestos (air) Count Sheet Client Name: NYC BOE Volnme fliters): ISOO Lab Gronp #: 7778 Filter Type / Filter Area: MCE 385 mm- Lab Sample #; 13 Grid Opening Size: 0.01124

Client Sample #; 15 Area Examined: 0.04496 mm’

GRID BOX: Magnification: 20 000 GRIDID: Acceierating Voltage: 100 KeV # Grid Openings: 4 Analysis Date: 5/18/02

Analysis Performed By: MARK PEYSAKHOV

GO. Structure Structure Type Length 10 of Structurs N or 7 EDS ■ (Ncnadb i No F 0 C M >=05 p :>=51J Chrys Amphibole ■Monash Ambig/ND No Coord Elements) i <5p

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Struct = > O.Sp > 5:1 Aspect Ratio Grid acceptance: xl= Positive diffraction pattern properties conforming to <50% undissaived filter, overtapped or folded Totals latjoratory tdentricafon criteria oOserved <10% particulate caverage >50% coverage ate least 20 unfolded oroveiapped grid squares <5% F B C >5p 7-EDE spectrum conforming to latjoratory 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 interseclions) Anthophyllite Non-Asbestos Tremolite M = Matrix Non-Identified Actinolite NSD - No Structures Detected

CITY_21MC1OO_OO29O1958

NYC-WTC_000228954