TEM Asbestos air sample results, NYC BOE, Feb 2002

NYC 9/11 Public Portal Document

TEM Asbestos fair) Count Sheet Client Name: WC BOE Volume (liters): is 34 Lab Group #: 6610 Filter Type / Filter Area: MCE 3S5 mm- Lab Sample #: 7 Grid Opening Size: 0.01124 Client Sample #: 10 Area Examined: 0.04496 min­ GRID B.OX: Magnification: 20,000 GRID ID: C? Accelerating Voltage: 100 KeV # Grid Openings: 4 Analysis Date: 2/9/02

Analysis Performed By: — MARK PEYSAKHOV

GO. Structure Structure Type Length ID of Structure N or V EDS No (Non abb F B C M ?=05p Chrys Amphibole Nonasb Ambig/ND No Coord <50 Elernenis)

2- 4dr> -27

Struct = > 0.5u _> 5:1 Aspect Ratio Grid acceptance: '/= Positive diffraction pattern properties conforming to <50% undissolved filter, ovenapped or folded Totals laboratory ioentification criteria observed <10% particulate coverage >50% coverage ate least 20 unfolded or overiapped grid squares <5% F B C M 1 >5p '</= cDS soectrum conforming to laboratory holes or opaque areas identifica-jon criteria observed Cltrysotile AMPHIBOLES Amphibole i F = Single Fiber Amosite • S = Sundle (<3 fibers <1 fiber diameter aoart Crocidolite Ambiguous } C = Cluster (>3 Intersections) Anthophyllite Non-Asbesros Tremolite M = Matrix j Non-Identified J Actinolite NSD = No Structures Detected

CITY_21MC100_003103077

NYC-WTC_000183740