NYC-WTC_000218311

NYC 9/11 Public Portal Document

TEM Asbestos (air) Count Sheet C lient Name: NYC BOE Volume (liters): 1920 Lab Group #: 6940 Filter Type / Filter Area: ■MCE 3s5 mm Lab Sample #: 11 Grid Opening Size: 9 011 24

Client Sample #: 11 Area Examined: 0.04496 mm-

GRID BOX: ■Magniti cation: 20,000 GRID ID: Accelerating Voltage: 100 KeV # Cirid Openings: 4 Analysis Date: V5/O2

Analysis Performed By: MARK PEYSAKHOV

GO. Structure Structure Type Length iD of Structure Nor v EDS No (Nonadt F 3 C M >=05 pi Chrys Amphibole Nonast- Ambig/ND ! No Coord Elements)

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Struct = > 0.5p > 5:1 Aspect Ratio Gnd acceptance: >/= Positive diffraction pattern properties conforming to <50% undissolved filter, overlapped or folded Totals laboratory identification criteria obsen/ed <10% particulate coverage >50% coverage ate least 20 unfolded or overlapped grid squares <5% I F i B 1 C I M i >: '/= EDS spectrum conforming to laboratory holes or opaque areas identification criteria observed Chrysotile i ______ 1_____ L AMPHIBOLES Amphibole ' F = Single Fiber Amosite B : Bundle (<3 libers <1 libei diameter apart Crocidolite Ambiguous i C = Cluster (>3 Intersections) Anthopnyllite Non-Asbestos j Tremolite M = Matrix Actinolite Non-ldentilled ' NSD = No Structures Detected

CITY_21MC100_000466278 NYC-WTC_0002 18311