NYC-WTC_000229335

NYC 9/11 Public Portal Document

TEM Asbestos (air) Count Sheet Client Name: NYC BOE Volume niters): 1816 Lab Group #: 8178 Filter Type / FUter Area: MCE 385 mm’ Lab Sample #: 16 Grid Opening Size: 0.01124 Client Sample #: 18 Area Examined: 0.04496 mm’ GRID BOX: Magnification; 20 000 GRID ID: Accelerating Voltage: 100 KeV # Grid Openings: 4 Analysis Date: 6/19/02

Analysis Performed By: ROliMAN^YSAKHOV

:I-----GO. Structure Structure Type Length lOofSteKture N or V EOS ,----------- (Nonadb No F S C W >=05p >=5p Chrys AmpWbote Nonasb Ambig,W No ■ Coord <5m Elements)

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Struct =» > 0.5(1 > 5;1 Aspect Ratio Grid acceptance: positive diffraction pattern properties conforming to <50% andissohted fftter, ovorfapped «fbWed Totals laijoratoty xJenWication criteria oSsarved <10% participate coverage >50% coverage ate lent 20 unfolded or overlapped grid squares <5% F B C M >5vi EDS spectrum conforming to latioratory holes or opacue areas ideneffcatjoii criteria observed Chrysotile rAMPHlBOLES~] Amphibole F = Single Fiber Anw^te i B = Bundle (<3 fibers <1 fiber diameter apart Crocidolite Ambiguous C = Cluster (>3 Intersections) , Anthophyllite Non-Asbestos Tremolite 1 M = Mafiw Actinolite Non-Idcntified NSO = No Stfuctums Detected

CITY_21MC1OO_OOO491978 NYC-WTC_000229335