TEM Asbestos air sample results, NYC BOE, Aug 2002

NYC 9/11 Public Portal Document

TEM Asbestos fair) Count Sheet Client Name: NYC BOE Volume (liters): 1952 Lab Group #: 8760 Filter Type / Filter Area: MCE 385 mm^ Lab Sample #: 11 Grid Opening Size: 0.01 124 Client Sample #: Area Examined: 0.04496 mm- GRID BOX: Magnification: 20,000 , GRID ID: Accelerating Voltage: 100 KeV # Grid Openings: 4 Analysis Date: 8/25/02

Analysis Performed By: ROMAN PEYSAKHOV

^GO. Structure Structure Type Length ID of Structure N or V EDS No (Nonadb F B C M >=05 p :>=5pi Chrys Amphibole Nonasb Ambig/ND , n . _ No Coord <5p Elements)

<2 -

Struct = > 0.5^1 > 5:1 Aspect Ratio Grid acceptance: Positive diffraction pattern properties conforming to "=50% uhdissolved 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 >5p 'J= EDS spectrum conforming to laboratory holes or opaque areas identification criteria obsen/ed Chrysotile AMPHIBOLES Amphibole F = Single Fiber Amosite B = .Bundle (<3 fibers <1 fiber diameter apart Crocidoiite Ambiguous C = Cluster (>3 Intersections) Anthiophyllite Non-Asbestos Tremolite ‘ M = fvlalrix Non-Identified Actinolite NSD = No Structures Delected

CONFIDENTIAL, CITY_21MC100_003430364 SUBJECT TO PROTECTIVE ORDER NO. 2, SEPT. 2008

NYC-WTC_000175146