NYC-WTC_000228808

NYC 9/11 Public Portal Document

TEM Asbestos (air) Count Sheet Client Name: NYC BOE Volume (liters): 1800 Lab Group #: 7664 Filter Type / Filter Area: MCE 385 mm" Lab Sample #: 14 Grid Opening Size: 0,01124 Client Sample#: 16 Area Examined: 0,04496 mm- GRID BOX: Magnification: 20,000 GRIP ID: Accelerating Voltage: 100 KeV # Grid Openings: 4 Analysis Date: 5/7/02

Analysis Performed By: MARK PEYSAKHOV

GO. StrucKtre Structure Type Length IO of Structure Nor 7 EOS i No (Nonadb F B C M >=05 M :>=5m Ctirys Amphibole tionasb Ambig/NCf No Coord Elements)

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Struct - > O.ip >5:1 Aspect Ratio Grid acceptance; t/= Positive dlffiacKort pattern properties contomlng to <S0% undissohred filler, overtapped or folded Totab laboratory identification criteria observed < 10% particuiate coverage >50% coverage ate least 20 unfolded or overlapped grid squares <5% F B C M >5p V= EDS spectrum conforming to laboratory holes or opaque areas (dentification criteria observed Chrysotile AMPHIBOLES Amphibole F- Single Fiber ! Amosite B = Bundle fibers <1 fiber diameter apart Crocidolite Ambiguous C = Cluster (>3 Intersecbdns) . Anthophyllite Non-Asbestos Tremolite M = Maths Actinolite NoQ-Identified NSD = SiructufBs Oetecied

CITY_21MC100_002901722

NYC-WTC_000228808