NYC-WTC_000192758

NYC 9/11 Public Portal Document

TEM Asbestos (air) Count Sheet Client Name: NYC BOE Volume (liters): 1920 Lab Group #: 7654 Filter Type / Filter Area; MCE 385 mm^ Lab Sample #: 1 Grid Opening Size: 0.01124 Client Sample #: 1 Area Examined: 0.04496 mm^ GRID BOX: Magnification: 20,000 GRID ID: / Accelerating Voltage: 100 KeV # Grid Openings: 4 Analysis Date: 5/6/02

Analysis Performed By: ROMAN reVSAKHOV

GO. Structure Structure Type Length ID of Structure N or 'i EDS No (Nonadb F. B C M >=05 p >=5p Ctirys Amphibole Nonasb Ambig/ND No T'ioord <5p Elements)

I'

Struct = > 0.5p > 5:1 Aspect Ratio Grid acceptance: a/= Positive diffraction pattern properties conforming to <50% undissolved filter, overlapped or folded Tot^ laboratory identification criteria observed <10% particulate coverage >50% coverage ate least 20 unfolded or overlapped grid squares <5% F B C M >5m EDS spectrum conforming to laboratory holes or opaque areas identification criteria observed Chrysotile ; AMPHIBOLY : Amphibole F = Single Fiber Amosite B = Bundle (<3 fibers <1 fiber diameter apart Crocidolite Ambiguous C = Cluster (>3 Intersections) ' Anthophyllite Non-Asbestos Tremolite M = Matrix Non-Identified ' Actinolite NSD = No Structures Detected

CITY_21MC100_003093163

NYC-WTC_000192758