NYC-WTC_000216731

NYC 9/11 Public Portal Document

TEM Asbestos (air) Count Sheet Client Name: NYC BOE Volume (liters): 1944 Lab Group #: 7108 Filter Type / Filter Area: MCE 385 mm^ Lab Sample #: 19 Grid Opening Size: 0.01124 Client Sample #: 19 • Area Examined: 0.04496 mm^

GRID BOX: Magnification: 20 000 GRIPED: Accelerating Voltage: 100 KeV # Grid Openings: 4 Analysis Date: 3/17/02

Analysis Performed By: MARK PEYSAKHOV

GO. Structure Structure T ype' Length ID of Structure NorN EDS No (Nonadb F B C M >=05 p : Chrys Amphibole Nonasb Ambig/ND ■No Coord <5p Elements)

‘I

Struct = > 0.5p .>-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 M >51J 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 T remolite M = Matrix Non-Identified Actinolite NSO = No Structures Detected

CITY_21MC100_002877355

NYC-WTC_000216731