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): 1928 Lab Group #: 7351 Filter Type / Filter Area: MCE 385 mm- Lab Sample #: 6 Grid Opening Size: 0.01124

Client Sample #: 08 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 Structure Type Length "iCNFiructjre N or 7 EDS No (Nonadb B C M >=05 u 1 '=5(J Chrys Amphibole Nonasb Ambig/ND i9o Coord <5p Elements)

77^ 'Z //

[O'S

■______________ _

! i

4

Struct = > 0.5p > 5:1 Asoect Ratio Grid acceptance;

A Positive dihraction pattern properties contorming ;o <50% jndissolved filter, overlapped or folded Totals <10% particulate coverage >50% coverage ale laboratory identification criteria oPsen/ed least 20 urioided or overlapped grid squares <5% F i B C M ■^5u 9= EDS spectrum conforming to laboratory holes or opaque areas identification criteria observed Chrysotile -AMPHIBOLES Amphibole F = Single Fiber Amosite Ambiguous | 3 = Bundle (<3 fibers <1 fiber diameter apart Crocidolite C = Cluster i>3 Intersections) Anthophyllite Non-Asbestos j T remolite M = Matrix Actinolite i Non-Identified j NSD = No Structures Detected

CONFIDENTIAL, CITY_21MC100_003459955 SUBJECT TO PROTECTIVE ORDER NO, 2, SEPT. 2008

NYC-WTC_000179550