NYC-WTC_000202405

NYC 9/11 Public Portal Document

TEM Asbestos (air) Count Sheet Client Name: NYGBOE Volume (liters): 1920 liabGroun^ 8760' Filter Type / Filter Area: MGE 385 mm^ Lab Sample #: 7 Grid Opening Size: 0.01124

Client Sample U: 7 Area Examined: 0.04496 mm\

GRID BOX: Magnification: 20,000 GRIDJD: Accelerating Voltage: 100 KeV # Grid Openings: 4 Analysis Date: 8/25/02

Analysis Performed By: ROMAN PEYSAKHOV

GO. Structure 'Structurs Type Length ID of Structure N or .'V EDS (Nor,abb No F B C M Chrys Amphibole Nonasb Ambig/ND No Coord Elenients)

Jmj 2 1

■ Struct = > 0.5|u > 5; I Aspect Ratio 7 Grid acceptance: /= Positive diffraction pattern properties conforming to <50% undissolved filter, overlapped or forded Totals laboratory identification criteria Observed <10% particulate coverage >50% coverage ate least 20 unfolded or overlapped grid squares <5% F - B c M >50 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) Anthophyllite Non-Asbestos i Tremolite M = Matrix I Actinolite Non-Identified NSD t No Structures Detected

CITY_21MC100_003272475

NYC-WTC_000202405