TEM Asbestos air sample results, NYC BOE, Feb 2002

NYC 9/11 Public Portal Document

TEM Asbestos (air) Count Sheet Client Name: NYC BOE Volume (liters): 1920 Lab Group #: 6703 Filter Type / Filter Area: MCE 385 mm- Lab Sample #: 6 Grid Opening Size: 0.01124 Client Sample #: 06 Area Examined: 0.04496 mm- GRID BOX: Magnification: 20,000 GRID ID: Accelerating Voltage: 100 KeV # Grid Openings: 4 Analysis Date: 2/17/02

Analysis Performed By: ROM.AN PEYSAKHOV

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

P'^

Struct = > 0.5|i .> 5;1 Aspect Ratio Grid acceptance;

Positive diffraction pattern properties conforming to <50% undissolved filter, overlapped or folded Totals laboratory identification criteria obsen/ed <10% particulate coverage >50% coverage ate least 20 unfolded or overlapped grid squares <5% F B C M >5p V= EDS spectrum conforming to laboratory holes or opaque areas identification criteria observed Chrysotile ' AMPHIBOLES '! Amphibole F = Single Fiber ' Amosite i 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_21MC100_003467981 SUBJECT TO PROTECTIVE ORDER NO. 2, SEPT. 2008

NYC-WTC_000181102