NYC-WTC_000229341

NYC 9/11 Public Portal Document

TEM Asbestos (air) Count Sheet Client Name: NYC BOE Volume fliters): 1808 Lab Group #: 8194 Filter Type / Filter Area: MCE 385 mm= Lab Sample #: 10 Grid Opening Size: 0.01124 Client Sample #: 12 Area Examined; 0.04496 mm- GRIP BOX: 20,000 GRID ID: Accelerating Voltage: 100 KeV # Grid Openings: 4 Analysis Date: 6/20/02

Analysis Performed By; MARKPEYSAKHOV

GO. Structure SUuctuiB Type Length IDofSIructitfB NorN EDS No (Nonaett) F B C M >*05 y :>=5p Chrys Ajnphibole Nonasb AmbigMO No Coord <5tJ Elements)

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Struct« > 0.5g > 5:1 Aspect Ratio Grid acceptance: '/= Posifive dMiadion pattern properties conforming to <50% undijsotved itor, overfapped or foirfad Totals iaboratory denttficatton criteria observed <10% particuiate coverage >50% coverage ate least 20 unfolded or overtapped giM squares <5% F B C M >5m >/= EDS spectrum conforming to laooratory boles or opaque areas identiScationcntenaQtBaved Chrysotile AMPHIBOLES Amphibole F X Single Fiber Amosite B = Bundle (<3 fibers <1 fiber diameter apart i Crocidolite Ambiguous C = Cluster (>3 interseettonsi I Anthophyllite Non-Asbestos I Tremolite M = Matrix Actinolite Non-ldcntiSed \‘S0 = No Structures Detected

CITY_21MC1OO_OOO491996 NYC-WTC_000229341