TEM Asbestos air sample results, NYC BOE, Nov 2001

NYC 9/11 Public Portal Document

TEM Asbestos (air) Count Sheet Client Name: NY’C BOE Votume (liters): 1944 Lab Group #: 5986 Filter Type / Filter Area: VICE 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: 11/29/01

.Analysis Performed By: ROMAN PEYSAKHOV

GC. Structure Structure Type Length ID of Structure N or V EDS (Nonadb No F B C M >=05 p Chrys Amphibole Nonasb Ambig/ND No Coord . <5|J Elements)

/g&z I| ('I (I

Struct = > G,5p _> 5:1 Aspect Ratio Grid acceptance: 4= 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% B j C M >5u 9= EDS spectrum conforming to laboratory holes or opaque areas j F identification criteria observed Chrysotile I AMPHIBOLES Amphibole F = Single Fiber Amosite B = Bundle (<3 fibers <1 fiber diameter apart i Crocidolite .Ambiguous C = Cluster {>3 Intersections) Anthophyllite Non-Asbestos Tremolite { M = Matrix Non-Identified Actinolite 1 NSD = No Structures Delected

CONFIDENTIAL, CITY_21MC100_003458497 SUBJECT TO PROTECTIVE ORDER NO. 2, SEPT. 2008

NYC-WTC_000179231