TEM Asbestos air sample results, NYC BOE, Feb 2002

NYC 9/11 Public Portal Document

TEM Asbestos (air) Count Sheet Client Name: NYC BOE VoIumeJIiterslL IS 24 Lab Group #: 6735 Filter Type ! Filter Area: MCE 385 mm- Lab Sample #: 14 Grid Opening Size: 0.01124 Client Sample #: i / Area Examined: 0.04496 mnn- GRID BOX: Manniti cation: 20,000 GRID ID: ■Accelerating X'oltage: 100 KeV # Grid Openings: 4 Analysis Date: 2/19/02

Analysis Performed By: ROM.AN PEYSAKHOV

GO. Structure Structure Type Length ID of Structure N or N EDS No >=05 M (Nonadb F B C M >=5pi Chrys Amphibole Nonas b Ambig/ND No Coord <5u Elements)

23g If

IK

i. i

Struct = > 0.5u ,> 5:1 Aspect Ratio Grid accepance: •/= Positive difiraction pattern properties conforming to <50% undissolved filter, overlapped or folded Totals Iaborato7 identification criteria observed <10% particulate coverage >50% coverage ate least 20 unfolded or overtapped grid squares <5% ' F j B C M >5u y = £DS spectrum conforming to laboratory holes or opaque areas identification critena obsen/ed Chrysotile I I AMPHIBOLES : Amphibole J r = Single .-ioer Amosite S = Sundle (<3 fibers <1 fiber diameter apart Crocidolite • .Ambiguous j C = Cluster (>3 Intersections) Anthophyllite Noil-Asbestos i T remolite M = Matrix i Non-Identified 1 Actinolite NSD = No Structures Detected

CITY_21MC1OO_OO31O3323

NYC-WTC_000183825