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 #: 4 Grid Opening Size: 0.01124 Client Sample #: Area Examined: 0.04496 mm- GRID BOX: Magnification: 20,000 GRID ID: Accelerating Voltage: 100 KeV # Grid Openings: 4 Analysis Date: 4/7/02

Analysis Performed By: MICHAEL GORYCKI

GO. Structure Struc:ure Type Length ID of Structure N or v EDS (Nonado No F B C M >=05 p Chrys Amphibole Nonasb Ambig/ND No Coord ^5p Elements)

Y //

/□fS----

Struct = > O.op > 5:1 Aspect Ratio Grid acceptance:

9= Positive diffraction pattern p'operties conforming to <50% undissolvec filter overlapped or folded Totals <10% particulate coverage >50% coverage ate laboratory identification criteria observed least 20 unfoidec or overlapped grip squares <5% f fTb C M >5p \'= EDS spectrum conforming tc laooratory hoies or opaque areas (. identification criteria observed Chrysotile AMPHIBOLES Amphibole I F = Single Fiber Amosite S = Bundle !<3 fibers <1 fibs' diameter apart Crocidolite Ambiguous 1 C = Cluster (>3 Inlersectionsl Anthophyllite Non-Asbestosi Tremolite M = Matrix I Non-Idcntified Actinolite NSD = No Structures Detected

CONFIDENTIAL, CITY_21MC100_003459953 SUBJECT TO PROTECTIVE ORDER NO. 2, SEPT. 2008

NYC-WTC_000179548