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

NYC 9/11 Public Portal Document

TEM Asbestos fair) Count Sheet Client Name: NYC BOE Volume (liters): 1920 Lab Group #: 7351 Filter Tvpe / Filter .Area: MCE 385 mm- Lab Sample #: 17 Grid Opening Size: 0.01124

Client Sample #: 19 Area Examined: 0.04496 mm-

GRID BOX: Magnification: 20,000 GRID ID: A^cele^atingJVoltag^ 100 KeV # Grid Openings: 4 Analysis Date: 4/7/02

Analysis Performed Bv; MICHAEL GORYCKl

GO. Structure Structure Type Length ID of Structure N or 4 EDS (Nonadb No F B C M ■=05p >=5(j Chrys Amphibole I Nonasb Atnbig/ND No Coord <5m Eiemenis)

4 a

fV -------

____

-

i J u Struct = >> 0 5p >5:1 Aspect Ratio Grid acceptance:

v= Positive diffraction pattern properties conforming to <50% undisscived filter, overlapped or folded Totals <10% particulate coverage >50% coverage ale laboratory identification criieria observed least 20 unfolded or overiapped grid squares <5% F ( B C I M >5p 9= EDS spectrum contorming to laboratory holes or opaque areas identification criteria observed AMPHIBOLES Chrysotile Amphibole .I "r~r i I F = Single Fiber Amosite B = Bundle {<3 fibers <1 fiber diameter apart Crocidolite Ambiguous C = Cluster (>3 Intersections) Anthophyllite Non-Asbestos Tremolite M = Matrix Actinolite I Nonddentifi^ NSD = No Structures Detected

CONFIDENTIAL, CITY_21MC100_0 03459966 SUBJECT TO PROTECTIVE ORDER NO. 2, SEPT. 2008

NYC-WTC_000179561