NYC-WTC_000230016

NYC 9/11 Public Portal Document

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TEM Asbestos (air) Count Sheet Client Name: NYC BOE Volume (liters): 1928 Lab Group 7149 Filter Type / Filter Area: MCE 385 Lab Sample #: 20 Grid Opening Size: 0.01124 Client Sample tt-: 20 Area Examined: 0.04496 GRID BOX: Magnification: 20,000 GRID ID: 2^^ Accelerating Voltage: 100 KeV # Grid Openings: 4 Analysis Date: 3/20/02

Analysis Performed By: ROMAN PEYSAKHOV

GO. Structure Structure Type Length ID of Structure N or EDS ' No (Nonadb F B C M >=05 M >=5p Chrys. Amphibole Nonasb Ambig/ND ' No Coord <5m Elemerts)

Cf

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 overiepped grid squares <5% v/= EDS spectrum conforming to laboratory F B C M >5j 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 Tremolite M = Matrix Non-Identified Actinolite NSD = No Structures Detected

CONFIDENTIAL, CITY_21MC1OO_OO3388617 SUBJECT TO PROTECTIVE ORDER NO. 2, SEPT. 2008

NYC-WTC_000230016