TEM Asbestos bulk sample results, NYC BOE, Apr 2002

NYC 9/11 Public Portal Document

TEM Asbestos fair) Count Sheet Client Name: N^’C BOE Volume (liters): 1744 Lab Group #: 7376 Filter Type / Filter Area: MCE 385 mm’ Lab Sample #: 10 GridOpeningSize: 0.01124 Client Sample #: 12 Area Examined: 0.0562 mm’

GRID BOX: Magnification: 20,000 GRID ID: Accelerating Voltage: 100 KeV # Grid Openings: 5 Analysis Date: 4/10/02

Analysis Performed By: MARK PEYSAKBOV

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

7^^ S’'

-.2 •JX' <6 ” X

Struct = > o.pp > 5:1 .Aspect Ratio Grid acceptance:

Positive diffraction pattern properties conforming to <50% undissolved filter, overlapped or folded Totals laboratory identification criteria observed <10% particulate coverage >50% coverage ate least 20 unfolded or overlapped grid squares <5% F B C M >5u EDS spectrum conforming to laboratory holes or opaque areas identificalion criteria observed Chiysotile ' AMPHIBOLES j Amphibole F = Single Fiber I Amosite I S = Bundle (<3 fibers <1 fiber diameter apart Crocidolite : Ambiguous C = Cluster (>3 Intersections) 1 Anthcphyllile | Non-Asbestos Tremolite M = Matrix Non-Identified Act,oolite NSD = N'O Structures Cetected

CONFIDENTIAL, CITY_21MC100_0 09505369 SUBJECT TO PROTECTIVE ORDER NO. 2, SEPT. 2008

NYC-WTC_000178872