NYC-WTC_000220770

NYC 9/11 Public Portal Document

TEM Asbestos (air) Count Sheet ClientName: NYC BOE Volume (liters): 1840 Lab Group #: 7354 Filter Type / Filter Area: MCE 385 mm^ Lab Sample #: 8 Grid Opening Size: 0.01124

Client Sample #: 08 Area Examined: 0.04496 mm-

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

Analysis Performed By: MARK PEYSAKHOV

GO. Structure Structure Type Length ID of Structure N or EDS (Nonedb No F B C M >=05 M Chrys Amphibole Nonasb Anibig/ND No Coord Elements) ) <5tJ

J

I Struct = > 0-5g > 5:1 Aspect Ratio Grid acceptance: '/ = Positive diffraction pattern 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 grid squares <5% F B C MT >5h '/= EDS spectrum confonnirg to laboratory holes or opaque areas Identification criteria observed Chrysotile AMPHIBOLES Amphibole F = Single F ber Amosite 3 = Bundle (<3 fibers <1 fiber diameter apart Crocidolite Ambiguous C = Cluster |>3 intersecticnsj Anthophyllite Non-Asbestos Tremolite M = Matrix Non-Identified Actinolite N5D = No Structures Detected

CITY_21MC100_000621702 NYC-WTC_000220770