TEM Asbestos air sample results, NYC BOE, Nov 2001

NYC 9/11 Public Portal Document

TEM Asbestos (air) Count Sheet Client Name: NYC BOE Volume (liters): 1920 Lab Group #: 5897 Filter Tvpe / Filter Area: MCE 385 mm- Lab Sample 10 Grid Opening Size: 0.01124

Client Sample #: 10 Area Examined: 0.04496 mm-

Magnificatign: GRID BOX: 933- 20,000 GRIDED: Accelerating Voltage: 100 KeV # Grid Openings: 4 Analysis Date: 11/15/01

Analysis Performed By: MICHAEL GORYCKI

GO. Structure Structure Type Length ID of Structure N or 4 EDS No (Nonadb t- B C M >=05 p >=5|J Chrys Amphibole Nonasb AniDig/ND No Coord <5p Elements)

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Struct = > O.Sp ,> 5:1 Aspect Ratio Grid acceptance: ^= Positive diffraction pattern properties conforming to <50% undissolved filter, overlapped or folded Totals laboratory identification criteria observed <10% particulate coverage >50% coverage ate

EDS spectrum conforming to laboratory least 20 unfolded or overlapped grid squares <5% c M >5u holes or opaque areas identification critena observed Chrysotile j AMPHIBOLES S Amphibole I------------------------ I F = Single Fiber Amosite B = Bundle (<3 fibers <1 fiber diameter apart Crocidolite .Ambiguous C = Cluster {>3 Intersections) Anthophyllite Non-Asbestos Tremolite M = Matrix j Non-Identified Actinrslite NSD = No Structures Detected

CITY_21MC100_003106448

NYC-WTC_000185365