NYC-WTC_000230135

NYC 9/11 Public Portal Document

TEM Asbestos (air) Count Sheet Client Name: NYC BOE Volume (liters): 1952 Lab Group #: 6429 Filter Type / Filter Area: MCE 385 Lab Sample #: 15 Grid Opening Size: 0,01124

Client Sample #: Area Examined: 0.04496 ram^

GRID BOX: Magnification: 20,000 . GRID ID: Accelerating Voltage: 100 KeV # Grid Openings: 4 ’ Analysis Date: 1/24/02

Analysis Performed By: ROMAN PEYSAKHOV i

GO. Structure Structure Type Length ID of Structure NorN CDS No ■ (Nonadb F B C M >=05 p >=5iJ Chrys I Amphibole Nonasb Ambig/ND Elements) No Coord <5p

5 P'z.

1 :

Struct = > 0.5p -> 5:1 Aspect Ratio Grid acceptance: a/= Positive diffraction pattern properties conforming to <50% undissolved filter, overlapped or folded Totals laboratory identtfication criteria ooserved <10% particulate coverage >50% coverage ate least 20 unfolded orovertapped grid squares <5% F B C M >5p . V= EDS spectrum conforming to laboratory holes or opaque areas identification criteria observed Chrysotile ' AMPHIBOLES i Amphibole F = Single Fiber Amosite S = Bundle (<3 fibers <1 fiber diameter apart ■ Crocidolite Ambiguous C = Cluster {>3 Intersections) ; Anthophyllite Non-Asbestos : Tremolite M = Matrix Actinolite Non-Identified

CONFIDENTIAL, CITY_21MC100_003388786 SUBJECT TO PROTECTIVE ORDER NO. 2, SEPT. 2008

NYC-WTC_000230135