NYC-WTC_000216485

NYC 9/11 Public Portal Document

TEM Asbestos (air) Count Sheet Client Name: NYC BOE Volume (liters): 1928 Lab Group #: 6820 Filter Type / Filter Area: MCE 385 mnV Lab Sample #: 14 Grid Opening Size: 0.01124

Client Sample #: 14 Area Examined: 0.04496

GRU) BOX: Magnification: 20,000 GIUDTT): Accelerating Voltage: 100 KeV # Grid Openings: 4 Analysis Date: 2/24/02

Analysis Performed By: MARK PEYSAKHOV

GO. Structure Structure Type Length IDofStructure N or 7 EDS No (Nonadb F B C M "^OSpi i>=5p Chrys Amphibole Nohasb Ambig/ND No Coord <5p Elements)

■a

a.

• Struct = > 0.5)1 >5:1 Aspect Ratio Grid acceptance: Positive diffraction pattem.properties conforming to <50% undissolved filter, overlapped or folded Totals laboratory identification criteria observed <10% particulate coverage >50% coverage ate least 20 unfolded or overlapped gn'd squares <5% F B C M >5p ^/= EDS spectrum conforming to laboratory 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 Intersections). I Anthophyllite NomAsbestos i Tremolite M = Matrix Non-Identified i Actinolite NSD = No Structures Detected

CITY_21MC100_002877089

NYC-WTC_000216485