Asbestos fiber analysis results, H.S. of Economics & Finance, Apr

NYC 9/11 Public Portal Document

TEM Asbestos (air) Count Sheet Client Name: NYC BOE Volume (liters): 1920 Lab Group #: 7351 Filter Type / Filter Area: MCE 385 mm" Lab Sample #: 9 Grid Opening Size: 0.01124

Client Sample #: 04 ArmiLAyHninetl: 0.04496 mm’

GRID BOX: 4^^ Magnification: 20,000 GRIDH): Accelerating Voltage: iOO KeV # Grid Openings: 4 Analysis Date: 4/7/02

Analysis Performed By: MICHAEL GORYCKI

GO. Structure Structure Type Length ID of Structure Norv EDS (Nonadb No F B C M >^057^ >=5u’ Chrys Amphibole Nonasb Amoig/ND No Coord <5p Elements)

g "S ? Xr 7

I 1~T

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

9= r^ositive diftraction pattern properties conforming to <50% undissoived filter, overlapped orfoldec Totals laboratory identification criteria observed <10% oarticulate coverage >50% coverage ate less; 20 unfolded or ovedapoed grid squares <5% F i F ) B C . M :>5u \= EDS spectrum conforming to laboratory holes or opacue areas identification criteria observed Chrysotile .AMPHIBOLES Amphibole r : Single Fiber Amosite e = Bundle l<3 fibers <1 fiber diameter apart Crocidolite Ambiguous C = Clusier ;>3 Intersections) Anthophyllite Non-Asbestos Tremolite M = Matrix i Non-IdeTitified Actinolite NSD = tslo Structures Detected

CONFIDENTIAL, CITY_21MC100_0 03459951 SUBJECT TO PROTECTIVE ORDER NO. 2, SEPT. 2008

NYC-WTC_000179546