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): 1816 Lab Group #: 6576 Filter Type / Filter Area: MCE ;385 mm- ' Lab Sample #: 6 Grid Opening Size: 0.01124

Client Sample #: 09 Area Examined: 0.04496 mni'

GRID BOX: Magnification: 20,000 GRIDID: Accelerating Voltage: 100 KeV # Grid Openings: 4 Analysis Date: 2/6/02

Analysis Performed By: MARK PEYSAKHOV

GO. Structure Structure Type Length ID of Structure N or 7 EDS (Nonadb No F B C M =05 p >=5|j Chrys j Amphibole Nonasb Ambig/ND No Coord <5p EtementS)

25

I ! o ( j

I I--------------------------------------------- 1------- 1-------------- _____ I i ! ""I i J Struct = > 0.5n > S:! Aspect Ratio Grid acceptance; V= Positive diffraction oatlern properties conforming to <50% undissotved filter, overlapped or folded Totals <10% particulate coverage >50% coverage ate laboratory identification criteria observed V= EDS spectrum conforming to laboratory least 20 unfolded or overlapped grid squares <5% I F j B C I M 1 >5p holes or opaque areas identification criteria observed Chrysotile । •—------------- AMPHIBOLES Amphibole I F = Single Fiber Amosite B = Bundle (<3 fibers <1 fiber dlamerer apart Crocidolite Ambiguous j C = Cluster (>3 intersections) Anthophyllite Non-Asbestos | Tremolite M = Matrix Actinolite Non-Identified ! NSD = No Structures Detected 1

CITY_21MC100_003103005

NYC-WTC_000183709