NYC-WTC_000224736

NYC 9/11 Public Portal Document

TEM Asbestos (air) Count Sheet Client Name: NYC BOE Volume (liters): 1920 Lab Group #: 7836 Filter Type / Filter Area: MCE 385 mm^ Lab Sample #: 4 Grid Opening Size: 0.01124 Client Sample #: 04 Area Examined: 0.04496 //^ Magnification: GRID BOX: 20,000 GRID ID: ^r^^rS Accelerating Voltage: 100 KeV # Grid Openings: 4 Analysis Date: 5/23/02

Analysis Performed By: ROMAN p'eYSAKHOV

GO. Structure Structure Type Length ID of Structure NorN EDS (Nonadb No F B C M •=5|J Chrys Amphibole Nonasb Ambig/ND No Coord Elements) <5p

0 7 f/

Struct = > 0.5p >5:1 Aspect Ratio Grid acceptance:

'1 = Positive diffraction pattern properties conforming to <50% undissolved filter, overlapped or folded Totals laboratory identification criteria observed <10% particulate coverage >50% coverage ate

7= EDS spectrum conforming to laboratory least 20 unfolded or overlapped grid squares <5% holes or opaque areas F B c M >5|j

identification cnteria 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 Tremolite M = Matrix ! Non-Identified Actinolite NSD = No Structures Detected

CITY_21MC100_002893522

NYC-WTC_000224736